JPS63137814A - Material injection in stamping mold equipment - Google Patents

Abstract

PURPOSE:To improve a commodity value by making an external appearance beautiful without incurring deterioration of strength, by performing a movement of a screening member of a nozzle according to a preset program. CONSTITUTION:A nozzle 6 of an injection die 1 is formed slenderly on an injection mechanism of stamping mold equipment. An auxiliary action control mechanism moving a movable screening member 21 extending to the center of the nozzle from both ends of the nozzle based on a program established beforehand is provided in a longitudinal direction of the nozzle. Then the screening member 21 is moved based on the program by the auxiliary action control mechanism while moving the nozzle 6 of the casting mechanism almost linearly by turning the same to about a right angle direction to a moving direction of the same by facing the same toward a terminal part Y-Y' from the beginning part X-X' of a molding part 53 of a mold 52 by a manual control mechanism. As an injection width of a material is fitted continuously to a width l of the molding part 53 like this, it does not happen that a gap which becomes a joint later is formed between the injection materials.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a feeding machine having a fluidized plastic material feeding mechanism, and a shaping mold that receives a certain amount of plastic material from the feeding machine and solidifies it. The present invention relates to a method for injecting material in a stamping mold apparatus, which includes a heat press machine and a main operation control mechanism that injects a plastic material into a mold while moving a material supply mechanism over the mold.

BACKGROUND OF THE INVENTION An example of the above-mentioned stamping mold apparatus is disclosed in Japanese Patent Publication No. 59-179 filed by the applicant of this application.
One example is the one disclosed in Publication No. 31. The outline of this device will be explained with reference to FIG. 4, and the details will be cited from the publication.

This device can be roughly divided into a fluidized plastic material feeder 41;
It consists of a heat press machine 42 and a main operation control mechanism 43. The material feeder 41 includes a heating and melting mechanism 45 for overplastic material that can be operated intermittently, a feed mechanism 46 connected to this, and an approximately It has a measuring mechanism 47 that measures and holds an amount of plastic material corresponding to a batch, and an injection mechanism 48 from which the material is pumped.The injection mechanism 48 is provided with an injection nozzle 49, and the measuring mechanism 47 and Injection mechanism 48
is mounted on the moving mechanism 50. The hot press machine 42 includes a shaping mold 52 arranged within the movement range of the injection nozzle 49 . The motion control mechanism 43 allows a necessary trajectory to be programmed using a perforated tape 55 or a numeric keypad (not shown), and uses, for example, a numerical controller or a microcomputer.

In such a device, when injecting material into the mold 52, the moving mechanism 51 is actuated by a command signal issued from the control mechanism 43, and the programmed moving mechanism 51, for example, A and B shown in FIG. , C, and D, the fluid plastic material is injected into the molding part 53 of the mold 52, and the programmed operating order includes starting and stopping the heating and melting mechanism 45, opening and closing each valve, etc. Activate by command according to the following.

Problems to be Solved by the Invention When the plastic material is injected into the mold 52 as described above, the injection nozzle 49 moves out of the mold 52, the heat press machine 42 is activated, and the mold is closed. 52 from Figure 6 (A) to (B)
It will be closed as follows. In this case, the material 56 on the trajectory AB and the material 56' on the trajectory CD are initially (
Although the two parts were separated as shown in A), their opposing ends have come closer together as shown in (B), resulting in a molded product joined at the joining part 57.

However, the joint portion 57 formed in this manner has the disadvantage that it forms streaks, which reduces the strength of the product, and also makes the product unsightly, reducing its commercial value.

Therefore, it is an object of the present invention to provide a method for injecting materials in a stamping mold machine that does not create joints that form streaks and therefore does not reduce the strength of the product, and does not have an unsightly appearance and reduce the commercial value. It is on offer.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention includes forming an elongated nozzle of an injection die in the injection mechanism of a stamping molding device, and in the longitudinal direction of the nozzle,
A shielding member that is movable from both ends to the center and a sub-motion control mechanism that moves this shielding member based on a preset program are provided, and the main motion control mechanism controls the nozzle of the injection mechanism into the mold. The auxiliary movement control mechanism moves the shielding member based on a preset program while moving the shielding member in a substantially straight line from the starting end to the terminal end of the molding part in a direction substantially perpendicular to the direction of movement. It is something to do.

Function: When injecting material as described above, when the injection mechanism moves linearly on the mold, a program for this is set in advance in the sub-movement control mechanism depending on whether the width of the molding part is wide or narrow. Since this control mechanism moves the shielding member from both ends of the nozzle to the center and from the center to both ends t, the material injection width is continuously adapted to the width of the molding part, Therefore, gaps that later become joints are not formed between the injection materials, as in conventional methods.

Embodiment 1 and 2 show an embodiment of the present invention, and 1 in the figure shows an injection die attached to the injection cylinder 40 of the injection mechanism 48, and this die 1 has two parts extending laterally. It has a die body 2 formed by connecting divided die pieces 3 and 4 with bolts 5.

This die body 2 has a nozzle 6 extending in the longitudinal direction on the lower surface and a narrow cavity 7 located above the nozzle 6 and communicating with the injection cylinder 40 and the nozzle 6. Both ends of the nozzle 6 and the cavity 7 are , is closed by an end plate 8 (only one of which is shown in FIG. 1) attached to the die body 2.

One die piece 3 is provided with a longitudinally extending choker 9 whose head is exposed in the cavity 7 so that it can be moved in and out.The choker 9 is inserted into the cavity 7 by a bolt 12 attached to the die piece 3. It can be moved in and out to adjust the amount of material passing through the cavity 7.

At the bottom of the other die piece 4, there is a nozzle 6 between it and the die piece 3.
A replacement lip 11 having a side surface forming an adjustment hole 10 extending in the longitudinal direction above the lip is removably attached. A longitudinal slit 16 is provided in the lower part of the die piece 3 facing the exchange lip 11.
A threaded hole is provided in the die piece 3 toward the die piece 3, and the threaded cylindrical portion of the cylindrical nut 13 is screwed into this threaded hole. A screw spigot 14 is screwed into the center screw hole of the nut 13, and the tip of the screw spigot 14 is fixed to the die piece 3 in front of the slit 16 across the slit 16. The pitch between the outer and inner threads of the nut 13 is larger in the latter than in the former, and as a result, when the nut 13 is rotated, the threaded rod 14 advances and retreats, opening and closing the slit 16. Adjust the width of the nozzle 6.

A pair of guide rails 15 are provided near the outer edges of the bottom surfaces of the die pieces 3, 4 and extend in the longitudinal direction.

Both side edges of an outer deckle 17 that moves along the bottom surface of the die body 2 are slidably fitted into this guide rail 15, and a lip mask 18 is placed on the adjustment bolt 20 at a position facing the opening of the nozzle 6 of this outer deckle 17. It is attached so that its position relative to the nozzle 6 can be adjusted. Each end plate 8 is provided with a through hole at a position opposite to the adjustment hole 10, and this through hole has an inner fitting 19 that goes in and out of the adjustment hole 10.
The outer ends of the two discs 17 and 19 into which are slidably fitted are each attached to a support plate 21 arranged parallel to the end plate 5.

A guide rod 22 whose one end is attached to the end plate 5 is slidably fitted into the support plate 21, and a screw stud 23 whose one end is rotatably attached to the end plate 5 is attached to the support plate 21 via a nut 24.
The support plate 21 is guided by the guide rod 22 and reciprocated by rotating the screw stud 23.

A motor board 25 parallel to the support plate 21 is attached to the other end of the guide rod 22, and the other end of the screw stud 23 is rotatably supported by this board 25 and extends. The end thereof is connected via a coupling 26 to a motor 27 installed on the substrate 25. A rotation angle detector 29 is installed on the mount 28 attached to the motor 27, and this detector 29 is connected to the belt 30. It works in conjunction with the threaded rod 23 via pulleys 31 and 32, and detects the state of rotation of the threaded rod 23 by the motor 27.

The injection method using such a device will be specifically explained.

The main operation control device causes the nozzle 6 to move to the mold 52 shown in FIG.
When the starting end xx' of the molding section 53 is reached, the material starts to be injected from the nozzle 6 into the molding section 53, and the nozzle moves in the direction of the arrow while injecting the material according to the set program.

At this time, the width Q of the forming part 53 changes as shown in the figure between one curve x-y and x'-y' toward the terminal end Y-Y'. It is installed as a program and adjusted according to the program as follows.

FIG. 1 shows a state in which the nozzle 6 is opened to the full width, and assuming that the width Q is narrower than this,
The motor 27 is operated by the sub-operation control mechanism, and the screw thread 2
3 to advance the support plate 21 to the left in FIG.

Along with this, the inner adjustment hole 19 is adjusted to the adjustment hole 10.
Inside, outer 17 and lip mask 18
advance along the opening of the nozzle 6, thereby narrowing the opening width of the adjusting hole 10 and the nozzle 6 to a width corresponding to the width 0 described above.

According to the width set in this way, the motor 27 rotates in either the forward or reverse direction according to instructions from the sub-operation control mechanism to adjust the position of the deckle 17.
When the width reaches 2', the injection from the nozzle 6 is stopped by the main operation control mechanism, and the injection die 1 is moved out of the mold 52 in the same manner as in the known method.

In the above-mentioned position adjustment of both discs 17 and 19, the rotation angle of the screw stud 23 is detected by the detector 29 using the belt 30 and the pulleys 31 and 32, and the amount of adjustment is constantly checked.

Effects This invention is as described above, and when moving the elongated nozzle of the injection mechanism over the molding part of the mold,
The nozzle is oriented almost perpendicular to the direction of movement, and its width is adjusted by moving the nozzle's closing member according to a program preset by the sub-movement control mechanism, so the injection material is placed on the mold. It has a planar shape instead of a linear shape, so there is no risk of joints forming during hot pressing after injection, which would reduce strength, and it also has a clean appearance. In addition, the nozzle movement locus is simple, the program can be simplified, and the nozzle movement mechanism can be simplified.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a part of the injection die used to carry out the method of the present invention, taken along the line ■--I in FIG. 2, and FIG. 3 is a process explanatory diagram of the method of this invention carried out by the same method as above; FIG. 4 is a layout diagram of each part of the entire apparatus used in the method of this invention; The figure is a drawing similar to FIG. 3 according to the conventional method, and FIG. 6 is an explanatory view before (A) and after (B) the injected material is pressed with a hot press machine.

Claims (1)

[Claims] 1. Approximately 1 determined by a fluid plastic material feeder having an injection mechanism and a molded product injected from the injection mechanism.
A heat press machine having a shaping mold that receives a batch of plastic material and plots it, and a main operation that injects the plastic material into the mold while moving the injection mechanism over the mold. In the stamping mold apparatus, the nozzle of the injection die of the injection mechanism is formed into an elongated shape, and a shielding member movable from both ends of the nozzle toward the center in the longitudinal direction of the nozzle; A sub-motion control mechanism is provided to move the member based on a preset program, and the main motion control mechanism
While moving the nozzle of the injection mechanism in a nearly straight line from the starting end of the molding section of the mold to the rear end while keeping it oriented almost perpendicular to the direction of movement, the sub-movement control mechanism moves the shielding member according to a preset program. A material injection method characterized by moving based on.