JPH0592444A - Injection molding device - Google Patents

Abstract

PURPOSE:To provide an external part-storing device for storing molded products produced by a molding machine in a normally arranged state and capable of copying with the full-automation of a system. CONSTITUTION:Both of an injection molding machine and an external stocker 112 being an external part storing device have an optical communication circuit consisting of a light emitting diode 217 and a phototransistor 218 and the injection molding machine further has the optical communication interface 216 connected to the optical communication circuit and the injection molding machine and the external stocker 112 are operated so as to be mutually synchronized by optical communication.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding system including an injection molding machine and an external component storage device for aligning and storing molded products molded by the injection molding machine.

[0002]

2. Description of the Related Art A molded product molded by an injection molding machine is taken out from a mold by a product take-out machine and is aligned and stored in an external component storage device.

[0003]

Conventionally, this external component storage device is independent of the injection molding machine and operates asynchronously with the injection molding machine, so that the molded product may become jammed on the way.
There is a possibility that the space between molded products may be too large and normal alignment and storage may not be possible. An object of the present invention is to provide an injection molding system in which an external component storage device can properly store and store molded products, and the system can be fully automated.

[0004]

In order to achieve the above object, in the injection molding system of the present invention, both the injection molding machine and the external component storage device have an optical communication circuit, and the injection molding machine further has an optical communication circuit. It is characterized in that it has an optical communication interface connected to a circuit, and that the injection molding machine and the external component housing device operate in synchronization with each other by optical communication.

[0005]

Since the external component storage device operates in synchronization with the injection molding machine by optical communication, the molded products can be properly aligned and stored, and the external component storage device can be used as an AGV.
If it is installed in an (unmanned guided vehicle), the entire system can be automated.

[0006]

Embodiments of the present invention will now be described with reference to the drawings. As shown in FIG. 4, the vertical injection molding machine of this embodiment (hereinafter referred to as “molding machine”) has a mold clamping device 1, a cylinder device 2 and an injection device 3 arranged on a vertical line, and ejects a molded product. The robot 4 is also provided with a robot 4, and detailed structures and control devices of the respective devices 1, 2, 3, 4 will be sequentially described below.

First, the mold clamping device 1 will be described. Figure 1
Also, as shown in FIG. 2, four tie bars 5 extending in the vertical direction (vertical direction) are provided on the upper surface of the frame 4a of this molding machine.
Are integrally projected, and at the upper end of each tie bar 5,
A fixed platen 9 having a fixed die (upper die) 7 of a die 6 described later is fixedly supported. A movable platen 10 having a movable mold (lower mold) 8 of a mold is moved vertically while being guided by four tie bars 5 by a mold clamping air cylinder 12 described later. An abutting member 31 is located below the movable platen 10, and the abutting member 31 is supported by the gantry 4a via an abutting member support stay 30. When the movable platen 10 descends, the abutting member 31 is abutted. The member 31 is configured to penetrate the movable platen 10. In addition, the movable platen 10 is integrally provided with a detection piece 13 described below for position detection.

A bracket 25 is integrally projectingly provided on the pedestal 4a. The bracket 25 has a rear end portion of the mold clamping air cylinder 12 as a drive source of the movable platen 10, and a mold clamping air cylinder support pin 27. It is rotatably supported via. A toggle link mechanism 29 is coupled to the rod 26a of the mold clamping air cylinder 12 via a coupling member 28, and both ends of the toggle link mechanism 29 are rotatably coupled to the movable platen 10 and the gantry 4a, respectively. .. When the rod 26a of the mold clamping air cylinder 12 is pulled in, the toggle link mechanism 29 extends, whereby the movable platen 10 rises along the four tie bars 5, and the mold 6
Is closed and clamped (states of FIGS. 1 and 2). On the other hand, when the rod 26a of the mold clamping air cylinder 12 is projected, the toggle link mechanism 29 is bent, the movable platen 10 is lowered along the four tie bars 5, and the mold 6 is opened (see FIG. 4). Status).

Here, the detailed structure of the mold 6 is shown in FIG.
Will be described with reference to. 6 (A), (B), and (C) show the mold 6 in a mold closed state, a mold opening state, and a completely mold opened state, respectively.
This mold 6 is a known hot runner type,
The fixed mold 7 includes a fixed side attachment plate 14 fixed to a fixed platen 9 (see FIGS. 1 and 2) and a fixed side mold plate 15.
The movable die 8 is composed of a hot tip bushing 16 and the like, while the movable die 8 is fixed to the movable platen 10 (see FIG. 1 and FIG. 2), and a movable side mounting plate 18 having a through hole 17 is formed. Three rectangular parallelepiped spacer blocks 19
And the movable side mold plate 20 and the like.

A projecting plate 21 is provided between the two spacer blocks 19 so as to be vertically movable, and a molded product 22 is formed on the upper surface of the projecting plate 21 by penetrating the movable side mold plate 20. Two protruding pins 23 for protruding
Are integrally projected. Each protruding pin 23
Since the compression coil springs 24 provided between the two spacer blocks 19 are respectively wound around, the projecting plate 21 is urged downward by the two compression coil springs 24.

When the mold 6 is opened by the above-mentioned toggle link mechanism 29 (see FIGS. 1 and 2), FIG.
As shown in FIG. 3, the abutting member 31 described above is used for the movable platen 10 (see FIGS. 1 and 2) and the movable side mounting plate 18.
2 through the through hole 17 of the
The projecting plate 2 against the spring force of the two compression coil springs 24.
By pushing up 1, the two projecting pins 23 project from the cavity bottom surface of the movable side mold plate 20 and the molded product 22
Is configured to stick out and hold.

Returning to FIGS. 1 and 2, the description will be continued. The first sensor support stay 32 projecting from the gantry 4a has a first, second, and third sensors 33 sequentially arranged from above.
a, 33b, 33c are fixedly supported, and the first, second
When the movable platen 10 reaches the position immediately before the completion of mold closing, the detection pieces 13 of the movable platen 10 cause the first sensor 33 to detect the respective positions of the third sensor 33a, 33b, and 33c.
When the movable platen 10 is in the mold closing or mold opening midway position, the detection piece 13 of the movable platen 10 is detected.
Are detected by the second sensor 33b, and when the movable platen 10 reaches the mold opening completion position, the detection piece 13 of the movable platen 10 is set to be detected by the third sensor 33c. Further, two direct-acting piston type shock absorbers 34, 35 are fixedly supported on the gantry 4a, and each shock absorber 34, 35 has the same structure and extends in the vertical direction. Up,
The movable platen 10 is located below both sides of the platen 10.

The air supply circuit to the mold clamping air cylinder 12 will be described. FIG. 7 is a circuit diagram of the air supply circuit in the mold open state. As shown in FIG.
Between the mold opening side port 12b of the mold clamping air cylinder 12 having 6a and the piston 26b and the air pressure source 101, a two-way valve 102 having a solenoid 102a from the air pressure source 101 side and two solenoids 103a and 103b are provided. First of 3-position 5-port all-port block type
4 way valve 103 is sequentially arranged. Further, a pressure switching circuit is arranged between the mold clamping side port 12a of the mold clamping air cylinder 12 and the first four-way valve 103, and this pressure switching circuit includes two solenoids 104a and 104b.
2 position 5 port type second 4 way valve 104 with
And a circuit in which the speed controller 105a and the low-voltage regulator 106 are connected in series and a circuit in which the speed controller 105b and the high-voltage regulator 107 are directly connected in parallel are connected in series Consists of. Each solenoid 103 of the above-mentioned first and second four-way valves 103, 104
A, 103b, 104a and 104b are energized (driven) at a predetermined timing described later by a control device described later.

In the air supply circuit described above, during mold clamping, one solenoid 104b of the second four-way valve 104 is energized in advance to switch to the high pressure regulator 107 side, that is, the mold clamping pressure is increased to the high pressure side. Set to. Then, one solenoid 103b of the first four-way valve 103
Is energized and switched, the pressurized air is supplied from the mold clamping side port 12a into the mold clamping air cylinder 12, and the mold 6 is closed at high speed and smoothly. When the detection piece 13 of the movable platen 10 is detected by the second sensor 33b during the mold closing, the control device energizes the other solenoid 104a of the second four-way valve 104, and the low pressure regulator 1
06, that is, the mold clamping pressure is set to the low pressure side, and the mold 6 is closed at a low pressure. When the detection piece 13 of the movable platen 10 is detected by the first sensor 33a, one solenoid 104b is energized again to switch to the high pressure regulator 107b side, and the mold clamping is completed. When the mold is closed by the low pressure, the mold 6 is prevented from being damaged due to foreign matter entering the mold parting surface. When opening the mold, first
The other solenoid 103a of the four-way valve 103 is energized.

Next, the cylinder device 2 will be described.
As shown in FIGS. 1, 2 and 3, the lower ends of the two air cylinders 36 are fixed to the upper surface of the end of the fixed platen 9, and the lower base connection is made to the rod 36 a of each air cylinder 36. Lower base 3 via member 38
9 are connected to each other, and the rod 36 of each air cylinder 36 is connected.
The lower base 39 is configured to move up or down by projecting or retracting a, respectively.

On the lower surface of the central portion of the lower base 39, a heating barrel (barrel) 42 having a cylinder head 41 having an open type nozzle 40 at the lower end portion (tip portion) is provided via a heating barrel mounting member 43. It is fixed, and a screw 44 is inserted in the heating cylinder 42. As shown in detail in FIG. 8, the screw 44 is provided with a screw head 45 and a backflow prevention ring 47 for preventing backflow of the molten resin 46 at the tip thereof, and is vertically moved and rotated by each separate driving means described later. Is done.

Returning to FIG. 1, FIG. 2 and FIG. 3, three band heaters 48a for heating the heating cylinder 42 are mounted on the outer peripheral surface of the heating cylinder 42, respectively. A band heater 48b is also attached to the cylinder head 41 of the cylinder 42. Each band heater 48a,
Heating cylinder 42 and cylinder head 41 wound with 48b
The temperature of each part of is detected by four thermocouples 49, respectively. As shown in FIG. 9, a hopper 51 is connected to the upper end of the heating cylinder 42 via a connecting member 42a integrally provided on the heating cylinder 42 and a chute 50 which is a pipe member in order, and the shutter 51a. The molding material (pellet) 51b falling from the hopper 51 when the is opened is supplied into the upper end portion of the heating cylinder 42 via the chute 50. Further, by closing the shutter 51a, the supply of the molding material into the heating cylinder 42 is shut off. The molding material supplied into the heating cylinder 42 is transferred to the lower portion of the screw 44 while being melted by the heat from the heating cylinder 42 and the shearing action of the rotating screw 44 and the heating cylinder 42. When the amount of the molten resin accumulated in the lower portion of the screw 44 reaches a predetermined amount, the screw 44 is quickly moved downward by the driving means described later, whereby the molten resin is preliminarily clamped by the nozzle 40 (see FIG. 3). It is injected into the mold 6 (see FIGS. 1 and 2).

A drain rod 52 is formed near the lower end of the chute 50, that is, in the vicinity of the connection to the heating cylinder 42, and a tube-shaped closing member 53 for closing the drain rod 52 is slid on the outer peripheral surface of the chute 50. It is fitted freely. When the closing member 53 is moved diagonally upward along the chute 50 as shown by an arrow A when changing the molding material or changing the color, the drain roller 52 is opened and unnecessary molding in the chute 50 is performed. The material can be efficiently discharged through the drain 52.

Next, the injection device 3 will be described. The injection device 3 melts the molding material by rotating the screw 44 and transfers the molten resin to the tip portion of the cylinder device 2, that is, the lower portion of the screw 44 while applying the back pressure, and the screw 44. Is a drive device for injecting the measured molten resin into a mold that has been clamped in advance by lowering (advancing).

As shown in FIGS. 2 and 3, on the upper surface of the end portion of the lower base 39, two guide shafts 54 extending in the vertical direction at predetermined intervals are provided in a protruding manner. A screw holder 58, which will be described later, is supported on the guide shaft 54 so as to be vertically movable. That is, the screw holder 58 has a protrusion 58a having guide holes on both sides thereof.
Since the respective guide shafts 54 are inserted into the respective protruding portions 58a, the screw holding body 58 is guided by the two guide shafts 54 and is movable in the vertical direction (vertical direction). The upper base 7 is attached to the upper end of each guide shaft 54.
3 is fixed.

The upper end of the screw 44 described above is integrally connected to the lower end of the screw extension shaft 56 by a screw fixing pin 55 so as not to rotate. An intermediate portion of the screw extension shaft 56 is rotatably supported by a screw holding body 58 via a pair of bearings 59. Further, a first toothed pulley 56a is fitted into the lower end portion of the screw extension shaft 56 and is fixed by a key.

The metering motor 60 (servo motor) is integrally fixed to the screw holder 58 via a metering motor holding stay 61, and the rotational force of the metering motor 60 is transferred to the first belt 62 via the first belt 62. By being transmitted to the toothed pulley 56a, the screw 44 and the screw 44
Is configured to be rotated. An upper stopper member 64 and a lower stopper member 65 are fixed to the upper and lower portions of each of the two guide shafts 54 by screws, and the two upper stopper members 64 and the two lower stopper members 65 hold the screw. The upper limit position and the lower limit position of the body 58 are regulated.

Further, one lower stopper member 65 is provided with an origin sensor 66a and a lower limit sensor 66b via a second sensor support stay 63, respectively. The origin sensor 66a is for detecting the origin of the screw holder 58. The lower limit sensor 66b is provided below the origin sensor 66a and detects the lower limit of the screw holder 58. The origin sensor 66a and the lower limit sensor 66b are used to find the origin of the injection device 3 (described later).
Is used when.

On the other hand, on the upper surface of the fixed platen 9, two injection device guide shafts 8 extending parallel to the respective air cylinders 36 are provided.
0 is integrally provided. This injection device guide shaft 8
Reference numeral 0 penetrates the guide member 81 fixed to the upper base 73 and the lower base 39 to support the guide member 81 so that the guide member 81 can move in the vertical direction. The rod 36a is projected or retracted to hold the screw. The body 58, and thus the injection device 3 is configured to ascend or descend while being guided by each injection device guide shaft 80. Based on this configuration, during normal injection molding, by pulling in the rods 36a of both air cylinders 36, the cylinder device 2 is moved to the mold 6 side against the reaction force of the molten resin in the mold 6. By pressing, the cylinder device 2 is not separated from the mold 6 by the reaction force. Further, when the mold 6 is replaced due to the change of the molded product as the target product, the rods 36a of both air cylinders 36 are made to project respectively, and the injection device 3 is raised to heat the injection device 3. Since a large space can be formed between the cylinder 42 and the mold 6, replacement work of the mold 6 becomes easy.

A load cell 67, which will be described later, is fitted in the upper end portion of the screw holder 58.
Is for detecting the reaction force of the molten resin in the mold 6. Here, the detailed structure of the load cell unit is shown in FIG.
This will be described with reference to 0. At the center of the load cell 67,
T-shaped connector plate 6 having a threaded portion in the central portion when viewed from the side
8 is screwed and fixed to the upper surface of the load cell 67 at even intervals. The lower end of a ball screw 70 is integrally fixed to the connector plate 68 via a mounting plate 69. In addition, at both ends of the connector plate 68, the pin 7
The pins 71 of the guide withdrawing 72 that integrally have 1 are respectively penetrated, and the lower end portions of the pins 71 are inserted into the two holes of the screw holding body 58, respectively.

Referring again to FIGS. 1, 2 and 3, based on these configurations, the (upward) reaction force applied to the screw 44 is transmitted through the screw extension shaft 56 and the screw holding body 58 to the load cell 67. By being transmitted to the lower surface of the outer peripheral portion of the load cell 67, a flexural force is generated in the load cell 67, and this flexural force is converted into a voltage signal.
The reaction force applied to can be measured.

A ball nut 75 is rotatably supported at the center of the upper base 73 via a pair of bearings 74. The ball screw 70 is screwed into the ball nut 75, and a second toothed pulley 76 for transmitting a rotational force is fixed by a screw. Has a second belt 77
The rotational force of the injection motor 78 (servo motor) is transmitted via the. As a result, the rotational force of the injection motor 78 is converted into a rectilinear force by the ball screw mechanism, and the screw holder 5
8 and thus the screw 44 can be moved up and down. Here, the injection motor 78 is the injection motor holding stay 7.
It is integrally fixed to the upper base 73 via 9.

Next, the molded product take-out robot 4 will be described. As shown in FIG. 4, a robot main body 82 is fixedly supported on a fixed platen 9 as a molding machine main body,
An arm 83 is attached to the robot body 82. The arm 83 is moved vertically and horizontally with respect to the robot main body 82 by a driving means (not shown), and a hand 84 for handling a work is attached to a tip end portion thereof. This hand 84 has a molded product 22 (see FIG. 6) on the two protruding pins 23 (see FIG. 6) when the arm 83 is at the pickup position L.
When the arm 83 is at the work opening position N, the picked molded product 22 is released. Further, during injection molding, the arm 83 is at an intermediate position between the pickup position L and the work opening position N. It waits at a certain waiting position M. The robot main body 82 is provided with a standby position sensor 85. The standby position sensor 85 is for detecting whether or not the arm 83 is in the standby position M at the time of starting the molding.

Further, on the side of the molding machine of this embodiment, the molded product 2 picked by the above-described molded product take-out robot 4 is used.
An external stocker 112, which is an external component storage device that stores 2 in line, is arranged. The external stocker 112 is for accommodating the molded product 22 (see FIG. 6) molded by the molding machine in a tape to facilitate the assembly of the molded product 22 by an automatic machine or the like. The operations of the molding machine and the molding machine are synchronized via an optical communication circuit including a light emitting diode 217 and a phototransistor 218 and an optical communication interface 216, which are non-contact communication means described later.

5A and 5B show the external stocker 112. FIG. 5A is a schematic perspective view of the same, and FIG. 5B is a detailed perspective view of an essential part of FIG. It is a perspective view of the hanging part of the tape 96. less than,
The detailed structure of the external stocker 112 will be described. The frame 92 as the main body of the external stocker has a plurality of casters 93.
It is equipped with and can be easily moved in all directions on the floor.
The take-up driven roller 95 supported by the frame 92 is provided with a molded product holding tape 94 in which a large number of recesses 94a matching the shape of the molded product 22 are formed at predetermined intervals (pitch P) in the longitudinal direction. A cover tape 96 is pre-wound on the cover tape roller 97 which is pre-wound and supports the smart body 92. Further, the winding driving roller 108 is in contact with the driving roller 111 on the outer peripheral surface thereof, and by rotating the driving roller 111 by the winding motor 110, friction force between the winding driving roller 108 and the driving roller 111 is generated. The winding drive roller 108 rotates. The sprocket 98 is rotated by the sprocket drive motor 99 by the pitch P.

When the external stocker 112 is used, one end of the molded product holding tape 94 is attached to the sprocket 9
8 and then fixed to the winding drive roller 108, and one end of the cover tape 96 is fixed to the cover guide 109.
And is fixed to one end of the (empty) molded product holding tape 94. Then, when the sprocket driving motor 99 and the winding motor 110 are driven, the molded product holding tape 94 is sent to the winding driving roller 108 side by the pitch P and the cover tape 96 is applied, and at the same time, the winding driving roller 1
It is wound on 08. At this time, the sprocket drive motor 9
By making the winding speed of the winding motor 110 faster than the feeding speed of 9, the slack of the molded product holding tape 94 can be prevented. When the molded product holding tape 94 is wound around the winding drive roller 108, the robot hand 84 (FIG. 4) is provided in the handling zone (shaded area in the drawing) 113 which is a position immediately before the cover tape 96 is applied to the molded product holding tape 94. And the molded product 22 held in FIG.
(See FIG. 6) is placed in the recess 94a of the molded product holding tape 94.

By repeating such an operation a number of times, a large number of molded products 22 are aligned and stored in the molded product holding tape 94. In this way, by combining the molding machine, the molded product take-out robot 4 and the external stocker 112, molding,
It is possible to continuously and automatically take out the molded products and arrange and store the molded products. Next, the control device in this embodiment will be described in detail with reference to FIGS. 11 to 33.

FIG. 11 is a block diagram showing the entire control device. The CPU 200 controls the entire control device. ROM2
In 01, a control program for controlling all operations of the molding machine of this embodiment is stored in advance. R
AM202 contains information necessary for the molding machine, such as molding conditions,
Servo gain constants of the injection motor 78 and the metering motor 60 are stored, input and corrected by the user, and retained by a battery backup circuit (not shown) so as not to be lost when the power is turned off. The CRT 210 is used to display information about the molding machine to the user. The keyboard 211 is used by the user to input data and give instructions to the control device. The CRT 210 and the keyboard 211 are the interface 209 and the CPU 200.
Connected with. Digital input interface 203
Is a sensor 33a, 33b, 33 that detects the state of an external sensor, for example, the position of the detection piece 13 of the movable platen 10.
This is a circuit for fetching the on / off state of c into the CPU 200. The digital output interface 204 is a circuit for controlling on / off of the solenoid valves 102 to 104. The motor interfaces 205 and 207 are drive circuits for feedback controlling the injection motor 78 and the metering motor 60, respectively, and have a deviation counter for counting the position of an encoder (not shown) and a current feedback circuit like a general servo control circuit. It consists of a motor drive circuit. The thermocouple interface 207 is connected to the thermocouple 49 urged to the cylinder device 2 and enables the temperature of the cylinder device 2 to be taken into the CPU 200. The solid state relay (SSR) interface 208 is
It enables the CPU 200 to turn on / off the SSR for turning on / off a heater driving circuit (not shown) for driving the band heaters 48a and 48b. Interrupt circuit 2
Reference numeral 19 denotes the CPU 20 at regular time intervals (for example, 5 msec).
An interrupt to 0, which causes the CPU 200
Is the control of the servomotors 78, 60, the band heater 48
By executing the temperature control programs a and 48b, it becomes possible to perform motor servo control and temperature PID control. The communication interface 212 is a circuit (for example, R) for delivering and receiving a signal for synchronizing with the molded product take-out robot 4.
S232c), which also includes a communication circuit with another external CPU. The robot controller 213 is a control circuit for controlling the molded product take-out robot 4. The load cell amplifier 215 amplifies the output signal of the load cell 67 to generate CP.
Enables incorporation into U200. The load cell interface 214 outputs the output of the load cell amplifier 215 to C
It is composed of an A / D converter circuit incorporated in the PU 200. The operation panel 221 is a manual operation device provided with operation buttons for manual / automatic mode switching, molding start, emergency stop, etc., an operating indicator, and an abnormality display LED. The operation panel interface 220 is for inputting the switch state of the operation panel 221 and LE.
This is a circuit for displaying D. The optical communication interface 216 is an external stocker 112 for storing a molded product.
A light-emitting diode 217 for optical communication which is a non-contact communication means for synchronizing with the
Is an input / output circuit for driving the. Timer circuit 222
Is a circuit used by the CPU 200 for time management of the molding process.

FIG. 12 is a block diagram showing the entire operation panel 221. 223 is an LED that indicates the operating state, and 224
Is an LED indicating an abnormal state. 225 is a select switch for selecting an operation mode, which is “off”, “manual”,
Select "1 cycle" or "automatic" mode. 22
6 is a push switch, which functions as an injection u raising switch in the off mode and as a mold opening switch in the manual mode. Two
A push switch 27 functions as an injection u lowering switch in the off mode, a mold closing switch in the manual mode, one cycle, and a molding switch in the automatic mode. 228 is a push switch, which functions as a purge switch in the manual mode. A push switch 229 functions as an operation stop switch in the manual, 1-cycle, and automatic modes, and as an abnormal reset switch in abnormal states in all modes. 230 is an emergency stop switch.

FIG. 13 is a flow chart showing the operation of the entire molding machine of this embodiment, and FIG. 14 is a flow chart showing the process of mode selection (step 302) in FIG. First, a power-up process at the time of turning on the power is performed (step 301), and then the operation mode is determined by the mode selection switch 225 (step 302), and each mode shown in FIGS.
7, 1 cycle mode 308, automatic mode 309). In each mode 306 to 309, each switch 226
.. to 229 are performed. When the processing in each mode ends, the abnormality flag is confirmed (step 303), and if the abnormality flag is not set, step 3
Returning to 02, if the abnormality flag is set, the abnormality content is C
It is displayed on the RT 210 (step 304). After that, an abnormality process is performed by the operator, it is determined whether the abnormality reset switch 229 is pressed (step 305), and if it is pressed, the process returns to step 302.

FIGS. 15, 16, 17, and 18 are flow charts showing the operation of the molding machine of this embodiment in the cutting mode 306, the one-cycle mode 308, the manual mode 307, and the automatic mode 309, respectively. In the off mode 306, the operation is determined by the operation switches 226 and 227, and if the operation switch 226 is selected, the injection unit raising operation is performed (step 310), and if the operation switch 227 is selected, the injection unit is lowered. The operation is performed (step 311). In the manual mode 307, the operation is determined by the operation switches 226, 227, and 228, and if the operation switch 226 is selected, the mold opening operation is performed (step 312), and if the operation switch 227 is selected, the mold closing is performed. An operation is performed (step 313),
If the operation switch 228 is selected, the purging operation is performed (step 314). In the 1-cycle mode 308, the operation is determined by the operation switch 227, and if the operation switch 227 is selected, the molding operation is performed (step 315). In the automatic mode 309, the operation is determined by the operation switch 227, and if the operation switch 227 is selected, the continuous molding operation is performed (step 316).

FIG. 19 is a flow chart showing the molding operation in the molding machine of this embodiment. First, the mold closing step 317
The injection process 318, the weighing / cooling process 319, the suck back process 320, the mold opening process 321, and the taking-out process 3 are performed.
Then, the molding operation is completed. FIG. 20 is a flow chart showing the continuous molding operation in the molding machine of this embodiment.

First, the mold closing step 323 is performed, and the injection step 3
24, weighing / cooling step 325, suckback step 32
6. The mold opening process 327 and the take-out process 328 are performed in this order, and the mode selection switch 22 is operated at the end check process 329.
It is confirmed whether or not 5 is the automatic mode, and if it is the automatic mode, the process returns to the mold closing step 323.

Next, the control program stored in the ROM 201 will be described. The programs in the ROM 201 are roughly classified into a sequence control program and a servo control program, and the sequence control program is the CRT 21.
0, input and judge the user's instruction to the molding machine by the operation panel 221, and the molding sequence (molding, purging, mold opening,
Perform mold closing etc.). The servo control program uses the interrupt circuit 219 for a fixed time (for example, 1 msec).
Called every time, the speed of the injection motor 78, the metering motor 60, the pressure feedback control, and the band heater 48.
Temperature control using a and 48b is performed. Note that description of the individual control algorithms is omitted because they are known PID algorithms.

Next, how each servo control program is executed in the interrupt control program will be described. When the power is turned on, the CPU 200 executes the sequence control program on the ROM 201, and carries out a memory check in the power-up process described later. At this time, the interrupt circuit 219 interrupts the CPU 20 after a predetermined time.
0, the execution of the sequence control program is interrupted and the interrupt program of FIG. 21 is executed.

First, it is checked whether the value of information (hereinafter referred to as "servo flag") set at a predetermined position in the RAM 202 is 1 (step 400), and if it is 1, the servo control program of the injection motor 78 is executed. (Step 40
1), set the value of the servo flag to 2 (step 40
2) The servo control program is ended, and the CPU 200 continues to execute the sequence control program from the interrupted continuation. After 1 msec again, the interrupt circuit 219
Then, the CPU 200 is interrupted and the servo control program is executed. Since the value of the servo flag is 2 this time, the metering motor control program is executed (steps 403 and 404), and the servo flag is set to 3 (step 405). After 1 msec again, the interrupt circuit 219 interrupts the CPU 200, and the servo control program is executed. Since the value of the servo flag is 3 this time, the temperature control program is executed (steps 406 and 407) and the servo flag is set to 1 (step 408). The interrupt circuit 219
The first interrupt of sets the servo flag to 1 (step 409).

The CPU 200 manages the execution of the sequence as described above while controlling the injection motor 78 and the metering motor 6.
0, temperature control is executed as if three programs were executed at the same time as the sequence control (to be exact, every 3 msec). FIG. 22 is a flowchart showing the power-up process in the molding machine of this embodiment.

First, when the power is turned on, the contents of the RAM 202 backed up in memory are checked for memory (step 410), and if there is an abnormality as a result, a predetermined abnormality processing is performed (steps 411, 4).
12). If the data is normal, band heaters 48a, 48
The temperature control by b is performed by using the SSR interface 208, the thermocouple 49, and the couple interface 207 in the ROM 2
It is started by the temperature PID control program stored in advance in 01 (step 413), and the confirmation is continued for each band heater 48a, 48b until the preset target temperature is reached (step 414). When all the band heaters 48a and 48b reach the target temperature, the screw cold rotation prohibition timer that starts rotation of the screw 44 is started until the band heaters 48a and 48b have a predetermined temperature for a predetermined time (step 415). ). Next, waiting for the timer to elapse (step 416), the power-up process is completed after a lapse of time.

FIG. 23 is a flow chart showing the origin finding step in the molding machine of this embodiment. First, the counter indicating the number of home search operations is cleared to 0 (step 42).
0). Next, whether or not the mold 6 is in the open state is confirmed by the signal of the third sensor 33c (step 421). If it is not in the open state, the origin search cannot be executed unless the mold is opened in the CRT 210. It is displayed (step 42)
2), the process ends. If the mold is open, the injection motor 7
8 is driven at a predetermined speed to move the screw 44 downward (injection operation) (step 423). Next, wait until the lower limit sensor 66b is turned on (step 4
24) When turned on, the motor interface 2 at that time
The value of the deviation counter (not shown) in 05 is stored as a lower limit sensor position in a predetermined position in RAM 202 (step 425). Subsequently, this time, the weighing motor 60 is rotated in the weighing direction at a predetermined speed (step 426),
The injection motor 78 is operated at a predetermined speed so that the screw 44 rises (step 427). After confirming that the origin sensor 66a is turned on (step 42)
8) The Z phase detection circuit (not shown) in the motor interface 205 confirms the Z phase of the injection motor 78 (step 429). If confirmed, the value of the deviation counter at that time is set to the predetermined position in the RAM 202 as the origin position. (Step 430). Injection motor 7 when saved
8. Stop the metering motor 60 (steps 431, 4
32). Next, the counter value is incremented by +1 (step 433), and it is confirmed whether or not the counter value is 2, that is, whether or not the home search operation has been completed twice (step 434).
This process is repeated once more than 1, and if completed, the value of the deviation counter of the second process is used as the origin finding result to perform the position control data calculation described later (step 435), and the molding operation is performed. The required position data of the encoder of the injection motor 78 is obtained and the origin finding process is completed.

FIG. 24 shows position control data calculation (step 4
It is a flow chart of 35). First, based on the lower limit sensor position (encoder value of the injection motor 78) obtained in the origin finding step and the weighing amount (mm) input from the keyboard 211 via the RAM 202 or the interface 209 in advance, the weighing complete position (= Weighing amount (mm) ×
The number of pulses per 1 mm + lower limit sensor position) is calculated as the encoder value of the injection motor 78 (step 44).
0). Next, this measurement complete position and the RAM 20 in advance
2 or keyboard 2 via interface 209
Using the suck back amount (mm) input from 11, the suck back complete position (= suck back amount (mm) x number of pulses per mm + measurement complete position-acceleration / deceleration time movement amount) is ejected in the same manner as in step 440. It is calculated as an encoder value of the motor 78 (step 441).

In step 442, the upper limit abnormal position of the screw 44 upon completion of injection, the lower limit abnormal position of the screw 44 upon completion of injection in step 443, the upper limit position of the screw 44 in step 444, and the step 445 in step 445. Set the lower limit position of the screw 44 to step 440.
Similar to the above, the encoder value of the injection motor 78 is calculated by the following equation.

Injection completion position upper limit abnormal position = injection completion position upper limit abnormal setting value (mm) x number of pulses per mm + lower limit sensor position (pulse) Injection completion position lower limit abnormal position = injection completion position lower limit abnormality setting value (mm) × Number of pulses per 1 mm + Lower limit sensor position (pulse) Upper limit position = Screw position upper limit abnormal setting value (pulse) + Lower limit sensor position (pulse) Lower limit position = Screw position lower limit abnormal setting value (pulse) + Lower limit sensor position (Pulse) FIG. 25 is a flowchart of the purging process in the molding machine of this embodiment.

First, the injection motor 78 is started with a predetermined speed pattern (for example, uniform acceleration) (step 450). Next, wait until the lower limit sensor 66b is turned on until the screw 44 is pushed down (step 45).
1). When the lower limit sensor 66b is turned on, the injection motor 78 is stopped (step 452). Next, the weighing motor 60
At a predetermined speed (step 45
3) Then, the injection motor 78 starts back pressure control by pressure feedback from the load cell 67 (step 454) to start the metering operation. Next, since this molding machine is an open nozzle type, the molten material drips from the tip of the nozzle in measurement control during the purging process. In particular, when back pressure is applied, the back pressure tends to sag, so when the injection device 3 is pushed down by the back pressure and the lower limit sensor 66b is turned on, the back pressure control of the injection motor 78 is stopped (steps 455, 4).
56), after waiting for a predetermined time (step 457), back pressure starts to be applied (step 454). If the lower limit sensor 66b does not turn on, the value of a deviation counter (not shown) in the motor interface 205 is read to check whether it has reached a value corresponding to a predetermined weighing value (step 458). If not, return to 455, If it has reached, a suck back process to be described later is executed (step 459) and it is checked whether or not there is an instruction to stop the operation panel 221 (step 460).

FIG. 26 is a flow chart showing the measuring process in the molding machine of this embodiment. First, the injection motor 78
Is driven to start pressure feedback (back pressure control) using the load cell 67 with a predetermined back pressure value as a target value (step 470). Next, the weighing motor 6
The rotation of 0 is started (step 471). next,
It is checked whether the lower limit sensor 66b is turned on (step 4
72) If it is turned on, the back pressure control is stopped (step 4
73), after waiting for a fixed time (step 474), the back pressure control is restarted (step 475). If the lower limit sensor 66b is off, it is checked whether the origin sensor 66a is on (step 476). If it is off, the process returns to step 472. When the metering progresses and the screw 44 rises, the injection device 3 rises, and the origin sensor 66a turns on, the value of the deviation counter (not shown) in the motor interface 205 of the injection motor 78 at that time is read and the counter value stored in the origin finding process is read. It is checked whether the difference is within a predetermined range (step 477), and if not, a predetermined abnormality process (step 478) is performed. If there is no abnormality, the measurement is further advanced, the injection device 3 is retracted, that is, the injection motor 78 is rotated, and the encoder value is waited until it reaches a value corresponding to a predetermined measurement amount (step 479). When it reaches, the metering motor 60 is stopped (step 480), the injection motor 78 is stopped (step 481), and the metering process is ended.

FIG. 27 is a flow chart of the suck back process in the molding machine of this embodiment. With the open nozzle type molding machine, the screw head 4
5 It is necessary to pull up the screw 44 to prevent the liquid from dripping from the tip. Therefore, the main molding machine also pulls up the injection motor 78 according to a predetermined pattern after completion of the measuring process.

First, the injection motor 78 is started in the pulling direction at a predetermined speed (step 4).
85). Next, it is checked whether or not the value of a deviation counter (not shown) in the motor interface 205 has reached a value corresponding to the above-mentioned movement amount by checking whether the movement amount has been raised by a predetermined movement amount (step 486), and when it reaches, the injection motor 78 Is servo-locked (step 487), and the suck back process is completed.

FIG. 28 is a flow chart of the injection process in the molding machine of this embodiment. First, the screw 44 is driven by the injection motor 78 at a predetermined speed pattern to fill the mold 6 with the material, and at the end of the filling process, the screw 44 is driven at a constant speed.
Moves forward (step 490). So load cell 6
The pressure value of No. 7 is monitored using the load cell interface 214 (step 491). If the set pressure 1 is not reached, the pressure value is waited until the set pressure 1 is reached. The pressure feedback control based on the pressure value is switched to control so that the set pressure becomes a constant value (step 49
2) The pressure value is kept constant for a predetermined pressure holding time 1 (step 493). When the holding pressure time 1 has passed, the target pressure value is switched to the holding pressure value 2 (step 494),
The pressure value is kept constant only for the holding time 2 (step 49
5). When the pressure holding time 2 has passed, the process proceeds to the pressure reducing process (step 496). In this case, if the pressure value is suddenly lowered at the end of injection, the screw 44 retracts more than necessary due to springback, which causes problems such as entrainment of air during metering. The pressure value is gradually lowered according to a predetermined pattern, and when the pressure reaches the back pressure value, the injection process is ended.

FIG. 29 is a flow chart of the mold opening process in the molding machine of this embodiment. First, the first four-way valve 10
3 solenoid 103a is energized (step 50
0). As a result, the pressurized air from the air source 101 is supplied from the die opening side port 12b into the die clamping air cylinder 12, and the die opening of the die 6 is started. Next, the detection piece 13 of the movable platen 10 moves to the position of the second sensor 33b,
It is checked whether the sensor 33b of No. 1 has output a signal (ON) (step 501). If it is ON, the mold clamping intermediate sensor flag is turned OFF (step 503). If OFF, it is checked whether the cycle time has been exceeded (step 502). If it has not exceeded, the process returns to step 501, and if it has exceeded, abnormal processing is performed (step 506). After step 503, the detection piece 13 of the movable platen 10 is moved to the third position.
Of the third sensor 33c to output a signal (ON) and check whether the sensor 33c has moved to the sensor 33c (step 50).
4) If it is on, it means that the mold opening has been completed. If it is not on, it is checked whether or not the cycle time is exceeded (step 505). If it is not over, the process returns to step 504, and if it is over, abnormal processing is performed. Perform (step 506).

30 and 31 are flowcharts of the take-out process in the molding machine of this embodiment. First, whether or not to use the external stocker 112 is determined from the contents of the RAM 202 set in advance by the user (step 51).
0). If it is not used, the normal extraction described later is performed (step 537). Next, when the external stocker 112 is used, the operation time-out timer of the external stocker 112 is started (step 511). Then, the stocker status output is read from the optical communication circuit to check whether the value is an odd number (step 512),
If the number is an even number, it means that the hardware is abnormal, and therefore predetermined abnormality processing (for example, displaying a comment of abnormality on the CRT 210 and turning on a warning lamp) is performed (step 513), and the process is ended. If it is not an odd number in step 512, it is checked whether the stocker status output value is 5 (step 514), and if it is 5, a predetermined remaining warning is issued (step 515) and step 521.
Go to. If it is not 5 in step 514, it is checked whether the stocker status output value is 3 (step 515), 3
If so, the in-operation display is output to the CRT 210 (step 516) and the process proceeds to step 518. If it is not 3 in step 516, it is checked whether the stocker status output value is 1 (step 518), and if it is 1, step 521
Go to. Check if stocker time is over (Step 51
9) If it is over, abnormal processing is performed (step 52
0). Otherwise, return to step 512. Next, a timer for operation time-out of the molded product take-out robot 4 is started (step 521). Next, it is checked whether or not the molded product take-out robot 4 is ready (whether it is in the retracted position) by checking whether the standby position sensor 85 is on (step 522). If it is not ready, it is checked whether the time is over (step 523). If so, the abnormality processing is performed (step 524). Otherwise, step 522.
Return to. If preparation is completed in step 522, a start command is sent to the molded product ejection robot 4 through the communication interface 212.
(Step 525). Next, the molded product take-out robot 4 is checked for an error (step 526), and if there is an error, a predetermined abnormality process is performed (step 527). If not, it is checked whether the time is over (step 528). If it is not over, it is determined whether or not the molded product take-out robot 4 takes out the molded product by the operation programmed in the robot controller 213 and moves it to the mold closing possible position. The state is checked from the state of 85 (step 530). If the standby position sensor 85 is off, the process returns to step 526 because it is not yet done. If the standby position sensor 85 is turned on, the take-out is completed, so a take-out completion signal of the molding machine is output (step 531). Next, the operation time-over timer of the external stocker 112 is started (step 532). Next, it is checked whether the external stocker 112 is in the feeding operation by reading the stocker status output from the optical communication circuit and whether the value is 3 (step 533). If it is not being fed, it is checked whether it is time out (step 53).
4) If it is over, abnormal processing is performed (step 53).
5). Otherwise, it returns to step 533. If it is being fed at step 533, the molding machine status output is set to 1 (step 536), and the take-out process is ended. In addition,
The odd / even statuses and the output values 1, 2, 3, etc. are merely examples, and can be realized by using other numerical values.

FIG. 32 is a flow chart of the normal take-out process in the molding machine of this embodiment. First, the timer for the operation time-out of the molded product take-out robot 4 is started (step 540). Next, it is checked whether or not the molded product take-out robot 4 is ready (whether it is in the retracted position) by checking whether the standby position sensor 85 is on (step 54).
1) If the preparation is not completed, it is checked whether the timer is over (step 542), and if it is over, abnormal processing is performed (step 543). Otherwise, it returns to step 541. If preparation is completed in step 541, a start command is issued to the molded product take-out robot 4 via the communication interface 212 (step 544). Next, the molded product take-out robot 4 is checked for an error (step 545), and if it is an error, a predetermined abnormality process is performed (step 5).
46). If not, it is checked whether or not the time is over (step 547). The state of the standby position sensor 85 is checked (step 549). If the standby position sensor 85 is off, the process returns to step 545 because it is not yet done. Standby position sensor 8
If 5 is on, the normal take-out process is completed.

FIG. 33 is a flow chart of the mold clamping process in the molding machine of this embodiment. When the mold clamping operation is started,
The one solenoid 104b of the second four-way valve 104 is energized to switch to the high-pressure regulator 107 side, that is, the mold clamping pressure is set to the high-pressure side, and the first four-way valve 103
One solenoid 103b is energized (step 55).
0). Then, the pressurized air from the pressurized air source 101 is supplied into the mold clamping air cylinder 12 from the mold closing port 12a, and the mold clamping of the mold 6 is started. Next, a timer (not shown) is activated to start counting the mold clamping time (step 5).
51). Next, whether the mold clamping intermediate sensor flag is on,
That is, it is checked whether or not the detection piece 13 of the movable platen 10 is already between the first sensor (mold clamping sensor) 33a and the second sensor (mold clamping intermediate sensor) 33b (step 55).
2) If there is between the sensors 33a and 33b, the other solenoid 104a of the second four-way valve 104 is energized and switched to the low pressure regulator 106 side, that is, to the low pressure side (step 559). If the mold clamping intermediate sensor flag is OFF, it is checked whether a signal is output (ON) from the mold clamping sensor, that is, the first sensor 33a (step 55).
3). At first, since the detection piece 13 of the movable platen 10 is not yet at the position of the first sensor 33a, it is further checked whether or not a signal is output (ON) from the second sensor 33b (step 554), and the signal is output. Then, the mold clamping intermediate sensor flag is turned on (step 555), and the mold clamping pressure is switched to the low pressure side (step 559). Second sensor 33
When the detection piece 13 of the movable platen 10 is not present at the position of b,
And, after the mold clamping pressure is switched to the low pressure side in step 559, it is checked whether or not the mold clamping time exceeds a predetermined time (step 556). If the mold clamping time exceeds the predetermined time, it is determined that foreign matter has entered the mold partitioning surface, and abnormal processing is performed (step 557). If the mold clamping time does not exceed the predetermined time, the process returns to step 553, and the detection piece 13 of the movable platen 10 is moved to the first sensor 33.
If it has not reached a, the above-mentioned processing is repeated. If the detection piece 13 reaches the first sensor 33a, the solenoid 104b of the second four-way valve 104 is energized to switch to the high pressure regulator 107 side, that is, The mold clamping pressure is switched to the high pressure side, and the solenoid 10 of the first four-way valve 103
Power is supplied to 3b (step 558).

Next, the operation of the molding machine of this embodiment will be described mainly with reference to FIGS. First, preparations for molding such as cleaning the mold 6 and supplying a molding material (pellet) 51b to the hopper 51 (see FIG. 9) are made in advance. When the molding preparation is completed and the power is turned on, each band heater 48
a, 48b temperature control, and the origin sensor 6
6a and the lower limit sensor 66b
The protrusion 58a of 8 is detected, and the origin is set. The position of the screw holder 58 at the end of the home search, and thus the position of the screw 44, becomes the home position. Then, based on the operation of the air supply circuit (see FIG. 7) described above, the mold is closed by the two-stage pressure control. Then, the rods 36a of the two air cylinders 36 of the injection device 3 are respectively retracted to lower the injection device 3, and the nozzle 40 (see FIG. 8) of the heating cylinder 42 is fixed to the fixed mold (upper mold) 7 side. Press on.

The screw 44 is advanced to the most advanced position (most lowered position) by the injection motor 78, and the metering motor 60 is activated to rotate the screw 44. Hopper 51
The molding material supplied from the inside of the heating cylinder 42 through the chute 50 is transferred to the tip portion of the screw 44 by the rotation of the screw 44. At this time, the molding material in the heating cylinder 42 is heated from the outer periphery by the band heaters 48a, and at the same time, frictional heat is generated due to the kneading action of the screw 44 and the heating cylinder 42, so that heat is generated internally. The temperature rises. While the screw 44 is rotating, the screw 44 is pushed back by the reaction force of the molten resin 46 (see FIG. 8) transferred to and stored in the tip portion of the screw 44, and the reaction force is detected by the load cell 67. However, by controlling the injection motor 78 so that the reaction force becomes a predetermined value,
The required injection quantity can be obtained by preventing the mixture of air etc. (measurement). After the measurement, the rotation of the screw 44 is stopped, and further, in order to prevent the resin dripping from the nozzle 40, the injection motor 78
Raise the screw 44 slightly (suck back).

After the suck back, the screw 44 is rapidly advanced (lowered) by the injection motor 78, and the molten resin 46 at the tip of the screw 44 is injected from the nozzle 40 into the closed mold 6 at a high speed ( Injection operation). After that, the screw 44 is stopped by the injection motor 78, and the holding pressure for holding the injection pressure is performed. After cooling the mold 6 for a required time, the mold 6 is opened. Immediately before the completion of the mold opening, the abutting member 31 supported by the gantry 4a abuts the projecting plate 21 (see FIG. 6) of the mold 6 so that the two projecting pins 23
(See FIG. 6) protrudes from the bottom surface of the cavity of the movable mold 8,
The molded product 22 (see FIG. 6) is projected and held.

When the mold opening is completed, the arm 83 of the molded product take-out robot 4 located at the standby position M moves in the horizontal direction and stops at the pickup position L, and its hand 84 projects two. After picking the molded product 22 on the pin 21, and after moving the arm 83 to the work opening position N, the hand 84 places the molded product 22 in the recess 94 a on the molded product holding tape 94. After that, the above-mentioned injection molding, removal (pick) of the molded product, and storage are continuously performed,
Then, when the above-described operation is continuously repeated for a plurality of cycles, a molded product holding tape 94 containing a large number of molded products 22 is obtained.

As described above, in this embodiment, since the external stocker 112, which is the external component storage device, operates in synchronization with the injection molding machine through optical communication, the molded products are properly aligned and stored. By incorporating this external component storage device into the AGV, automation of the entire system becomes possible.

[0062]

As described above, according to the present invention, since the external component housing device and the injection molding machine operate in synchronization with each other by optical communication, the molded products are properly aligned and housed.
Further, if this external component storage device is incorporated into the AGV, there is an effect that the entire system can be automated.

[Brief description of drawings]

FIG. 1 is a schematic front view of a mold 6 of an embodiment of a vertical injection molding machine of the present invention in a mold closed state.

FIG. 2 is a schematic side view of the vertical injection molding machine of FIG.

3 is a vertical cross-sectional view showing details of an injection device 3 and a cylinder device 2 of the vertical injection molding machine of FIG.

4 is a diagram showing a state in which a molded product take-out robot 4 and an external stocker 212 are installed in the vertical injection molding machine of FIG.

5A is an enlarged perspective view showing a detailed structure of an external stocker 112 in FIG. 4, and FIG. 5B is a perspective view showing a molded product holding tape 94 and a cover tape 96.

6A and 6B are vertical cross-sectional views of the mold 6, where FIG. 6A shows a state in which the mold 6 is closed, and FIG. 6B shows a state in which the mold 6 is being opened. FIG. 6C shows a state where the mold 6 is completely opened.

FIG. 7 is a circuit diagram of an air supply circuit of the mold clamping air cylinder 12.

8 is an enlarged vertical sectional view of a tip portion (screw head portion) of the injection device 3 shown in FIG.

9 is an enlarged view of the molding material supply unit shown in FIGS. 1 and 2. FIG.

FIG. 10 is an enlarged view of the load cell unit shown in FIG.

FIG. 11 is an overall configuration diagram of a control device in the present embodiment.

FIG. 12 is a configuration diagram showing an entire operation panel 221.

FIG. 13 is a flowchart showing the overall operation of the molding machine of this embodiment.

FIG. 14 is a flowchart showing a process of mode selection in FIG.

FIG. 15 is a flowchart showing the operation of the molding machine of this embodiment in the cutting mode 306.

FIG. 16 is a flowchart showing the operation of the molding machine of this embodiment in the 1-cycle mode 308.

FIG. 17 is a flowchart showing the operation of the molding machine of this embodiment in the manual mode 307.

FIG. 18 is a flowchart showing the operation of the molding machine of this embodiment in the automatic mode 309.

FIG. 19 is a flowchart showing a molding operation in the molding machine of this embodiment.

FIG. 20 is a flowchart showing a continuous molding operation in the molding machine of this embodiment.

FIG. 21 is a flowchart of an interrupt program.

FIG. 22 is a flowchart showing a power-up process.

FIG. 23 is a flowchart showing an origin finding step.

FIG. 24 is a flowchart of position control data calculation.

FIG. 25 is a flowchart showing a purging step.

FIG. 26 is a flowchart showing a weighing process.

FIG. 27 is a flowchart showing a suck back process.

FIG. 28 is a flowchart showing an injection step.

FIG. 29 is a flowchart showing a mold opening process.

FIG. 30 is a flowchart showing a take-out step.

FIG. 31 is a flowchart showing a take-out step.

FIG. 32 is a flowchart showing a normal take-out step.

FIG. 33 is a flowchart showing a mold clamping process.

[Explanation of symbols]

1 Mold clamping device 2 Cylinder device 3 Injection device 4 Mold ejection robot 4a Stand 5 Tie bar 6 Mold 7 Fixed mold (upper mold) 8 Movable mold (lower mold) 9 Fixed platen 10 Movable platen 12 Mold clamping air cylinder 12a Mold clamping Side port 12b Model open side port 13 Detecting piece 14 Fixed side mounting plate 15 Fixed side template 16 Hot tip bushing 17 Through hole 18 Movable side mounting plate 19 Spacer block 20 Movable side template 21 Projection plate 22 Molded product 23 Projection pin 24 Compression Coil Spring 25 Bracket 26 Mold Closing Air Cylinder 26a Rod 26b Piston 27 Mold Closing Air Cylinder Support Pin 28 Connecting Member 29 Toggle Link Mechanism 30 Abutting Member Support Stay 31 Abutting Member 32 First Sensor Support Stay 33a First Sensor 33b Second sensor 33c Third sensor Service 34,35 Shock absorber 36 Air cylinder 36a Rod 38 Lower base connecting member 39 Lower base 40 Nozzle 41 Cylinder head 42 Heating cylinder (barrel) 42a Connecting member 43 Heating cylinder mounting member 44 Screw 45 Screw head 46 Molten resin 47 Backflow prevention ring 48a, 48b Band heater 49 Thermocouple 50 Chute 51 Hopper 51a Shutter 51b Molding material 52 Drainro 53 Closing member 54 Guide shaft 55 Screw fixing pin 56 Screw extension shaft 56a First toothed pulley 57 Guide rod 58 Screw retainer 58a Projection part 59 Bearing 60 Metering Motor 61 Metering Motor Holding Stay 62 First Belt 63 Second Sensor Support Stay 64 Upper Stopper Member 65 Lower Stopper Member 66a Origin Sensor 66b Lower Limit Set Service 67 Load cell 68 Connect plate 69 Mounting plate 70 Ball screw 71 Pin 72 Guide plate 73 Upper base 74 Bearing 75 Ball nut 76 Second toothed pulley 77 Second belt 78 Injection motor 79 Injection motor holding stick 80 Injection device guide shaft 81 guide member 82 robot body 83 arm 84 hand 85 standby position sensor 92 frame 93 caster 94 molded product holding tape (embossed tape) 94a recessed portion 95 take-up driven roller 96 cover tape 97 cover tape roller 98 sprocket 99 sprocket drive motor 101 Air pressure source 102 2-way valve 102a, 103a, 103b, 104a, 104b
Solenoid 103 First four-way valve 104 Second four-way valve 105a, 105b Speed controller 106 Low pressure regulator 107 High pressure regulator 108 Winding drive roller 109 Cover guide 110 Winding motor 111 Drive roller 112 External stocker 113 Handling zone 200 CPU 201 ROM 202 RAM 203 Digital input interface 204 Digital output interface 205 Motor interface 206 Motor interface 207 Thermocouple interface 208 SSR interface 209 Interface 210 CRT 211 Keyboard 212 Communication interface 213 Robot controller 214 Load cell interface 215 Load cell amplifier 216 Optical communication interface 17 Light-Emitting Diode for Optical Communication 218 Phototransistor for Optical Communication 219 Interrupt Circuit 220 Operation Panel Interface 221 Operation Panel 222 Timer Circuit 223 to 230 Switch 301 to 329 Step 400 to 409 Step 410 to 416 Step 420 to 435 Step 440 to 445 Step 450 ~ 460 steps 470-481 steps 485-487 steps 490-496 steps 500-506 steps 510-537 steps 540-549 steps 550-558 steps

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tadanobu Miyazaki 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.

Claims (1)

[Claims] 1. An injection molding system comprising an injection molding machine and an external component storage device for aligning and storing molded products molded by the injection molding machine, wherein both the injection molding machine and the external component storage device are optical. A communication circuit is provided, and the injection molding machine further has an optical communication interface connected to the optical communication circuit, and the injection molding machine and the external component housing device operate while synchronizing with each other by optical communication. The characteristic injection molding system.