JPH0520493Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a raw material supply device that supplies recycled raw materials to a raw material regenerating machine, and in particular, the present invention relates to a raw material supply device that supplies recycled raw materials to a raw material regenerating machine, and in particular, the present invention relates to a raw material supply device that supplies recycled raw materials to a raw material regenerating machine. It was designed to provide a good supply.

<Prior Art> Generally, surplus materials such as fluffs and threads of film pieces generated during the production of synthetic resin films or nets are processed into pellets using a raw material recycling machine.

In order to send recycled raw materials to this raw material regenerating machine,
A raw material supply device as shown in the figure is used.
As shown in the figure, the raw material supply device 10 is integrally formed with a supply port 13 projecting from a lower end portion and communicating with a recycled raw material input port 12a provided in a part of an extruder 12 having a screw 11. hopper 14 and a motor 1 placed on a bracket 15 provided at the upper end opening 14a of the hopper 14.
6, a conveying shaft 17 is provided vertically and coaxially with a rotating shaft (not shown), and a conveying means 19 is provided with a screw blade 18 spirally provided on the conveying shaft 17. The screw blade 18 is configured such that the outer diameter of the screw blade 18 gradually becomes smaller toward the supply port 13 side in accordance with the shape of the hopper 14 in order to forcibly push the raw material having a small bulk specific gravity downward. Above the opening 14a of this hopper 14, an input port 21 of an introduction passage for a mixed recycled raw material 20 containing recycled raw materials having different bulk specific gravity is located, and the recycled mixed raw material 20 is guided into the hopper 14. .

<Problems to be solved by the invention> However, the conventional recycled raw material supply device 10
When recycled raw materials such as flats and strings are supplied over a long period of time, the flats and strings are pushed into the vicinity of the supply port 13 below the screw blade 18, and the screw blades 18 gradually become clogged. There is a problem in that it gets tangled with the tip and cannot be efficiently fed to the screw 11 side of the extruder 12.
Further, there is a problem in that recycled raw materials with extremely low bulk specific gravity accumulate in the side wall of the upper part of the hopper 14.

<Means for Solving the Problems> The configuration of the present invention for solving the above problems is such that a supply port communicating with the molding machine is formed at the lower end, and an inner wall surface for guiding the falling of the raw material faces toward the supply port. The hopper is provided with a slanted hopper, and a conveying means having a lower end located near the supply port and forcibly conveying the raw material to the vicinity of the supply port at at least one location inside or on the inner wall surface of the hopper. In the raw material supply device, the conveyance means is a conveyor belt that is wound around pulleys disposed near the supply port and near the upper opening of the hopper, and has a scraper plate on the outer surface of the pulley for moving the raw material. It is characterized by

Further, the conveyor belt may be disposed at at least one location along the inner wall surface of the hopper.

Further, scraping plates may be provided at the center of the interior of the hopper, facing the conveying surfaces of the conveying belt, and erected on the outer surfaces thereof, and may be alternately arranged in a different manner.

<Function> In the above-mentioned configuration, when recycled raw materials with various bulk specific gravity are mixed and fed into the hopper, the raw materials with light bulk specific gravity tend to accumulate in the upper part of the hopper, but the conveying means transports the recycled raw materials with light bulk specific gravity. The raw material is forcibly conveyed together with the raw material having a heavy bulk specific gravity to the vicinity of the supply port communicating with the molding machine, and is reliably fed into the molding machine.

<Embodiments> Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the transport means 1 along the inner wall surface of the hopper.
07A is a schematic diagram of a raw material supply device showing an embodiment of the present invention.

A raw material supply device 100A according to this embodiment includes a hopper 102 that communicates with an extruder 12 through a supply port 101, and a set of upper and lower pulleys 121 and 12 disposed above and below an inner wall surface 120 of the hopper 102. 122 and is wound around these upper and lower pulleys 121, 122, and its outer surface is on the hopper inner wall surface 1.
20 and a conveying means 107A comprising a conveying belt 123 extending along the conveyor belt 123.

The inner wall surface of the hopper 102 has an inner wall surface 120.
Rotating shafts 125 and 126 are rotatably supported by brackets 124 provided above and below the upper rotating shaft 125, and a large-diameter upper pulley 121 is mounted on the lower rotating shaft 126, and a small-diameter lower pulley 122 is mounted on the lower rotating shaft 126. are provided for each. And these upper pulleys 12
1 and the lower pulley 122, a conveyor belt 123 is wound around the inner wall surface 120 of the hopper 102.

Further, a motor 129 supported via a bracket 130 is provided at the upper end opening 102a of the hopper 102, and a transmission belt 13 is wound around the motor 129 and the upper pulley 121.
The conveyor belt 123 is driven by the operation of the motor 129 via the motor 129.

Further, as shown in FIGS. 1 and 2, a large number of scraping plates 127 are erected at regular intervals in the width direction on the outer peripheral surface of the conveyor belt 123, and the gaps between these raking plates 127 are Lower pulley 1
22 and the inner wall surface 120, there is a border plate 1 having a protrusion 140 sandwiched between a pair of brackets 124.
41 is located. Yotsuteko no Jiyama Board 141
This prevents the raw material from being scraped up above the hopper 102.

In this way, in the raw material supply device 100A, when various recycled mixed raw materials 109 having different bulk specific gravity are introduced into the hopper 118 from the introduction passage 110, the recycled raw materials with lower bulk specific gravity accumulate near the upper part of the hopper 102. At this time, motor 12
9 to the left to drive the upper pulley 121 to the left and similarly rotate the conveyor belt 123 to the left, the recycled raw material with a light bulk specific gravity accumulated at the top is pushed downward, and It reaches 101 and is supplied into the screw 11 of the extruder 12.

Note that the attachment position of the conveyor belt 123 is such that the conveyor belt 123 penetrates the wall of the hopper 102, so that the conveyor belt 123 is attached to the hopper 102 only when descending.
If the material is moved along the inner wall surface within the material 2, the conveyor belt will only work to move the material downward.
There is no need to worry about stirring up raw materials.

In this embodiment, as shown in FIG.
7A is provided along the inner wall surface 120 of the hopper, but it is also possible to arrange it in the center of the hopper 102. At this time, a means to prevent the raw material from being scraped up is required.

FIG. 3 is a schematic diagram of such another embodiment of the raw material supply device. Note that the same reference numerals are given to the same members as those of the raw material supply device 100A of the embodiment described above, and the explanation thereof will be omitted.

The conveying means 107B of the raw material supply device 100B according to this embodiment includes a pair of vertical rotation shafts 134A and 134B that are respectively supported in parallel in the vicinity of the upper part and the lower part of the central part of the hopper 102, passing through the hopper 102. , 135A, 135B, upper pulleys 131A, 131B and lower pulley 1.
32A and 132B are fixedly installed, respectively, and a conveyor belt 133A is wound around the upper and lower pulleys 131A and 132A, and a conveyor belt 133B is wound around the upper and lower pulleys 131B and 132B, respectively. The conveying surfaces of these conveying belts 133A, 133B are positioned to face each other, and the scraping plates 127 erected on the surfaces of these conveying belts 133A, 133B are moved alternately. . These conveyor belts 133A,
133B, one upper pulley 131A is rotated via a transmission belt 128 from a motor 129 fixed to a bracket 130 provided in the upper opening 102a of the hopper 102, and the other upper pulley 131A is The upper pulley 131B is rotated in the opposite direction to the upper pulley 131A by a transmission means such as a friction wheel with gears. When the motor 129 is rotated to the left, the transmission belt 128
, the upper pulley 131A rotates to the left, causing the conveyor belt 133A to rotate to the left. On the other hand, upper pulley 13
The upper pulley 131B, which rotates in the opposite direction to 1A, rotates clockwise, causing the conveyor belt 133B to rotate clockwise.

In such a raw material supply device 100B, when various recycled mixed raw materials 109 having different bulk specific gravity are supplied into the hopper 102 from the introduction passage 110,
Objects with relatively light bulk specific gravity tend to accumulate near the top of the hopper 102, but as described above, they are rotated by the motor 129 and transferred to the conveyor belts 133A, 133.
When B is driven, the raw material with a light bulk specific gravity accumulated in the upper part is also pushed downward together with the raw material with a heavy bulk specific gravity and is supplied into the screw 11.

Note that the conveyor belt 133B may be directly driven by the motor 129 via a figure-8-shaped transmission belt.

Furthermore, the means for driving the conveyance means is not limited to the transmission means using the motor and transmission belt described in this embodiment, but may also be implemented using other power transmission means such as a chain type or gear type. Good too.

The rotary shaft supporting means for supporting the pulley around which the conveyor belt is wound may be provided on the inner wall of the hopper instead of passing through the hopper as described in this embodiment.

Furthermore, the motor may also be provided on the side of the hopper instead of being provided on the top of the hopper.

In this embodiment, a belt-type conveying means provided in the hopper 102 has been specifically explained, but the present invention is not limited to these. It may take some means. Further, the conveyance means disposed inside the hopper may be a single conveyance means, a plurality of conveyance means, or a combination of various conveyance means.

<Effects of the invention> As explained above in detail along with the examples,
The raw material supply device according to the present invention is equipped with a conveyance means for conveying the raw material to the vicinity of the supply port in the hopper, so even if a mixed raw material containing raw materials with different bulk specific gravity is supplied, the raw material can be efficiently transferred into the molding machine. This has the effect of allowing smooth feeding.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a raw material supply device according to an embodiment of the present invention, FIG.
The figure is a schematic diagram of a raw material supply device according to another embodiment,
FIG. 4 is a schematic diagram of a conventional raw material supply device. In the drawing, 11 is a screw, 12 is an extruder, 1
00A and 100B are raw material supply devices, 101 is a supply port, 102 is a hopper, 107A and 107B are conveying means, 109 is a raw material, and 120 is an inner wall surface.

Claims (1)

[Claims for Utility Model Registration] 1. A hopper in which a supply port communicating with a molding machine is formed at the lower end and whose inner wall surface for guiding the falling of the raw material is inclined toward the supply port, and the inside or inner wall surface of this hopper. A raw material supply device comprising a conveyor whose lower end is located in the vicinity of the supply port and forcibly conveys the raw material to the vicinity of the supply port, wherein the conveyance means is located between the vicinity of the supply port and the hopper. 1. A raw material supply device characterized in that it is a conveyor belt that is wound around pulleys each disposed near an upper opening and has scrapers on its outer surface for moving the raw material. 2. The raw material supply device according to claim 1, wherein the conveyor belt is disposed at at least one location along the inner wall surface of the hopper. 3. Utility model registration claim No. 3, which is provided in the central part of the interior of the hopper, and is characterized in that the conveying surfaces of the conveying belts face each other, and scraping plates standing on the outer surfaces of these plates are alternately arranged. The raw material supply device according to item 1.