JP2824022B2 - Equipment for manufacturing recycled resin for molding - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing an unrequired resin product, such as a gate or a runner connecting plural resin products, which is generated during the injection molding of a synthetic resin. TECHNICAL FIELD The present invention relates to a method and an apparatus for producing a recycle material for molding for reuse as a material.

[0002]

2. Description of the Related Art In general, for example, in injection molding of a resin product, a trial molded product produced by trial molding from the start of molding until the temperature of a mold stabilizes to a predetermined value, or a defective molded product during mass production operation. Also, unnecessary objects such as gates and runners connecting a plurality of resin products are generated. These unnecessary materials are used as a part of molding materials for the next molding from the viewpoint of resource saving and cost reduction.

[0003] When the above-mentioned unnecessary material is reused, means for dissolving the unnecessary material again to produce regenerated rice granules;
Means of pulverizing unnecessary materials into a predetermined particle size by a crusher to prepare a regenerated resin material is mainly employed.
These regenerated pellets and regenerated resin are both mixed with new pellets (virgin pellets) and used as a part of the molding material.

[0004]

However, since the regenerated pellets are produced through a step of heating at a high temperature for a considerable period of time, the quality of the regenerated pellets is deteriorated by heat, resulting in poor strength and poor weather resistance. Therefore, when reused, the application is limited to resin products having low properties and not requiring strength and the like, and can be reused only for a very small portion of the resin products. Therefore, there is an annoyance that inventory management of the regenerated pellets is required.

On the other hand, in the case of using a recycled resin material that has been pulverized, unnecessary materials are pulverized by a crusher to select the size of the pulverized material, and only those having a predetermined size range are selected and used. Defects such as voids (bubbles), silver streaks referred to as silver, and black spots referred to as burns occur in the resin product obtained by molding the resin material obtained by mixing the resin regenerated material with new pellets. Easy to do. If these defects appear on the appearance, they will not disappear even if painted. Therefore, it cannot be used for a resin product or the like that requires an aesthetic appearance, and its use is also limited.
In addition, when the resin material is reused for a resin product whose appearance does not matter, the mixing ratio in the entire resin material is set to 2 in terms of strength and the like.
It is limited to keep it below 0%.

Accordingly, the present invention provides a method and apparatus for producing a recycled molding material that can be reused as a part of a molding material by increasing the mixing ratio in the entire forming material without substantially limiting the application. The purpose is to do.

[0007]

First, an aspect of the present invention will be described. The present inventors have investigated the cause of the above-described defects such as voids, silver, and burns when a recycled resin material obtained by pulverizing unnecessary materials into a predetermined particle size is mixed with new pellets and reused. As a result, it was found that the occurrence of the defect was due to the effect of the powder adhering to the surface of the recycled resin material. That is, in order to pulverize the unnecessary material into fine particles to produce a regenerated resin material, the unnecessary material is pulverized by a crusher for a relatively long time. In the pulverizing step, a large amount of powdery resin powder is generated, and this powder adheres to the surface of the pulverized material, and most of the powder remains adhered without dropping off from the pulverized material even during the sorting by the particle size sorting device.

Next, in the process of supplying the recycled resin material to the hopper of the molding apparatus via the conduit, the recycled resin material rubs against each other, or the recycled resin material is rubbed on the inner surface of the conduit or the hopper, and the powder is removed. The body falls from the granular resin reclaimed material and accumulates. The molding material in which the reclaimed resin material and the deposited powder are mixed into new pellets, for example, is filled into an injection cylinder of an injection molding machine and, when heated for melting, a powder having a small volume has a large volume. Since it is melted and heated more quickly than a new pellet or a recycled resin material, if the temperature is too high, overheating decomposition or gasification of the powder occurs. Voids are generated by gasification, and the air in the voids is heated to a high temperature by adiabatic compression during compression molding to carbonize the surrounding resin, causing burns and the like. Therefore, the present invention has been made by paying attention to the point that the above-described various inconveniences can be prevented by removing the powder adhering to the resin recycled material.

[0009] That is, in order to achieve the above-mentioned object, the apparatus for manufacturing a reclaimed material for molding according to claim 1 of the present invention is capable of reducing unnecessary materials generated during molding of resin products. A particle size sorting device that sorts the crushed material that has been crushed to a specified particle size or less.
A powder removal method for spraying a fluid on the pulverized material selected by the particle size separation device to remove powder adhering to the pulverized material.
And the particle size sorting device is directed obliquely downward.
The powder removing device having a transport passage for flowing down the pulverized material.
Is obliquely upward facing the pulverized material flowing down the transport passage.
The fluid is sprayed toward it.

[0010]

[0011]

[0012] The manufacturing apparatus for molding a reproducing material according to claim 2, in addition to the first aspect, pulverizing the unwanted product generated during the molding of the resin product below a predetermined particle size A crushed material crusher for roughly crushing unnecessary materials, and a small crusher for crushing the crushed material by the large crusher to a predetermined particle size or less. is constituted by the said <br/> comprises a fixed cutter and a movable cutter large split crusher crushing sandwich the unnecessary matters from both sides, the Kowari crusher crushing the crushed material by the large split crusher rotation It has a cutter.

[0013]

According to a third aspect of the present invention, there is provided an apparatus for manufacturing a reclaimed material for molding, wherein the small crusher according to the second aspect is configured such that the pulverized material from the large crusher is introduced from an upper inlet. A rotary cutter provided at the lower part of the inside to pulverize the pulverized material to a size smaller than a predetermined particle size, and an inner space of the casing being rotatably provided at an intermediate portion of the inner wall of the casing with one end serving as a fulcrum and opening and closing the inner space of the casing An intermediate lid that divides freely, a powder trap member that is fixed to an inner peripheral wall surface of the casing in a state in which a lower portion faces inward above the intermediate lid and covers a peripheral portion of an upper surface of the intermediate lid, An upper lid for opening and closing the charging port of the casing.

According to a fourth aspect of the present invention, in addition to the configuration of the third aspect , the moving unit that moves between a position corresponding to the charging port of the casing and a side position thereof is provided. The movable unit is provided with the upper lid so as to be movable up and down, and the movable unit is moved downward to close the opening of the casing and open the upper opening to open the opening. The mechanism is installed.

[0016]

According to a first aspect of the present invention , there is provided a particle size separation apparatus for selecting a particle size of a pulverized material obtained by pulverizing unnecessary substances to a predetermined particle size or less, and selecting a pulverized material having a particle size range suitable as a resin recycle material.
However, there is a transport path that allows the crushed material to flow down diagonally downward.
Then, a powder removing device that sprays a fluid such as dry air to the selected crushed material flows down the transport passage.
The fluid is sprayed obliquely upward toward the pulverized material.
Therefore, the pulverized material that is going to flow down is pushed by the fluid.
It is returned and mixed sufficiently with the subsequent pulverized material, sufficiently stirred, and the powder adhering to the surface of the pulverized material is scraped off, and the powder is blown off by the fluid, so it is within a predetermined particle size range. In addition, it is possible to obtain a recycled resin material from which powder adhering to the surface has been almost completely removed. In a resin product molded by using a molding material in which the regenerated resin is mixed with a new pellet, defects such as voids, silver, and burns caused by mixing of the powder into the molding material hardly occur. Therefore, the resin can be reused without restricting the application, and no defect occurs even if the mixing ratio of the resin recycled material to the whole molding material is increased.

[0017]

[0018]

According to a second aspect of the present invention , an unnecessary material is roughly divided into crushers.
After crushing to the size with
In a large crusher, unnecessary objects are sandwiched and crushed by a fixed cutter and a movable cutter, and then crushed, and crushed by both cutters. The crushed material produced by the large crusher is crushed to a predetermined particle size or less by a rotary cutter of the small crusher. In the split crusher, not only crushing but also cutting with both cutters, it is possible to suppress the amount of generated powder and to pulverize smoothly. Further, since the small crusher is a rotary type, the crushed material can be efficiently crushed.

According to a third aspect of the present invention , after the crushed material is charged into the casing of the small crusher from the charging port, the charging port is closed with the upper lid, and the internal space above the rotary cutter of the casing is closed with the intermediate lid. The rotary cutter is driven in this state. Therefore, the loud noise generated by the operation of the rotary cutter is confined in the casing and can be sufficiently silenced. Most of the powder generated in large quantities by the rotary cutter and rising in the casing is blocked by the intermediate lid, and the powder that has risen through the gap between the intermediate lid and the inner wall of the casing is also blocked by the powder trap member. And does not leak out of the casing.

According to the fourth aspect , when the crushed material is charged into the small crusher, the moving unit is retracted to the side position of the casing with the upper cover raised, so that the upper cover does not hinder the supply of the crushed material. . When the pulverized material has been charged,
The moving unit moves to a position corresponding to the input port, and subsequently, the upper cover opening / closing mechanism is operated to seal the input port with the upper cover, so that a great noise reduction effect can be obtained.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic structural view showing an entire apparatus for manufacturing a resin recycle material for molding according to one embodiment of the present invention. FIG. 1 illustrates an injection molding machine 1 as a molding machine for a resin product. In the injection molding machine 1, pellets of a molding material such as ABS resin charged into the hopper 4 are supplied into the injection cylinder 3, and the pellets filled in the injection cylinder 3 are heated and melted. Next, when the molding die 2 is clamped, an injection screw (not shown) in the injection cylinder 3 is operated by rotation of a drive motor (not shown), and molten pellets in the injection cylinder 3 are injected. It is injected into the mold 2 from the nozzle 5.

After a certain period of time has passed since the molten pellets were injected into the mold 2, the mold 2 is opened and the molded resin product is taken out. At a work place 6 adjacent to the injection molding machine 1, a worker determines the quality of the taken out resin product and removes the gate, runner and burrs. The resin product determined to be defective and the removed gate, runner, Unnecessary objects 29 such as burrs are put into the box 7.

Unnecessary items 29 in the box 7 are conveyed by the first conveyor 8 and put into the large crusher 9, where they are roughly pulverized to a particle size larger than a predetermined particle size. The crushed material 54 discharged from the large crusher 9 is conveyed by the second conveyor 10 and put into the small crusher 11, and is finely crushed to a predetermined particle size or less by the rotary cutter 12 in the small crusher 11. You. The large crusher 9 and the small crusher 11 constitute a crushed material producing device 13.

The pulverized material 54 produced by the small crusher 11 is sucked by a vacuum pump (not shown) through a vacuum tube 14 to a hopper 16 of a particle size sorting device 15.
It is thrown in. The particle size sorting device 15 sorts out the pulverized materials 54 having a predetermined particle size range suitable for reuse as pellets. Sorted crushed material 54
For b, the powder adhering to the surface is removed by spraying a fluid by a powder removing device to be described later, and is temporarily inserted into the storage box 19 as the resin recycled material 79. The recycled resin material 79 in the storage box 19 is stored in the material tank 23 via the vacuum tube 21 and mixed with new pellets (virgin pellets) from the material supply hopper 24 to form a molding material. The molding material is supplied to the hopper 4 of the injection molding machine 1 via the conduit 26 by driving of a pneumatic transport machine (not shown).
Supplied to

FIG. 2 is a longitudinal sectional view showing the large crusher 9. This large crusher 9 has an opening 30 for an unnecessary material 29 of a resin product conveyed by the first conveyor 8 on an upper surface of a rectangular box-shaped casing 27. A fixed cutter C1 and a movable cutter C2 are opposed to each other at positions opposite to both sides of the insertion port 30. The space between the fixed cutter C1 and the movable cutter C2 in the casing 27 is a pulverizing chamber for the unnecessary material 29.

FIG. 3A shows the movable cutter C2 shown in FIG.
2B is a sectional view taken along line BB of FIG. 2, and FIG. 3C is a sectional view taken along arrow C of FIG. 2. FIG.
As shown in (a), the blade 32 of the movable cutter C2
Are arranged substantially in a cross shape. That is, a cross-shaped mounting portion 35 is protruded from one surface of the square substrate 33, and both sides of each plate-like portion extending in four directions from the center of the mounting portion 35 are also shown in FIG. Thus, the blades 32 are fixedly arranged in parallel as a pair.
Therefore, in this embodiment, a total of eight blades 32 are provided. As shown in FIG. 2, the mounting portion 35 has a shape in which four triangular plate-shaped portions are combined so that the center portion is highest.
Are arranged so as to be inclined rearward from the center toward the side.

On the other hand, a total of eight blades 31 of the fixed cutter C1 are provided corresponding to the blades 32 of the movable side, and these blades 31 of the fixed side are, as shown in FIG.
It is fixed to the opposing sides of the four L-shaped fixing bases 36, and as shown by the two-dot chain line in FIG. positioned. Each fixing base 36 is supported by a quadrilateral substrate 34 attached to the inner wall surface of the casing 27.

The center of the other surface of the substrate 33 is attached to a rod 38 of a hydraulic cylinder 37 fixed to the inner wall surface of the casing 27, as shown in FIG. The drive reciprocates between a solid line position and a two-dot chain line position in FIG. On the other surface of the substrate 33, four guide shafts 39 are fixed around a rod 38, and each guide shaft 39 is slidably inserted into a guide bush 41 mounted on a support plate 40. The movable cutter C2 has four guide shafts 39.
Is held by the guide bush 41 and moves stably. The support plate 40 is fixed to the inner wall surface of the casing 27, and the rod 38 is connected to the through-hole 42 of the support plate 40.
Is pierced.

A discharge port 43 for dropping the pulverized material obtained by pulverizing the unnecessary material 29 onto the second conveyor is opened in the lower surface of the pulverizing chamber of the casing 27. Top input port 3
The 0 and lower discharge ports 43 are opened and closed by an upper door 45 and a lower door 46, respectively. These doors 45, 46
Are slidably held by a pair of guide rails 47 having a U-shaped cross section at both edges (the front side and the back side of the paper surface in FIG. 2), and are provided movably in the left-right direction of FIG.
Both are moved by driving the air cylinder 48 to open and close the inlet 30 and the outlet 43.

FIG. 4 is a longitudinal sectional view showing the small crusher 11. In FIG. 4, the casing 51 supported by the support 49 is provided with a second conveyor 10 from the large crusher 9 (FIG. 1). Pulverized material 5 being transported
4 is open at the upper end.
A seal member 57 such as a ring-shaped rubber is adhered to the peripheral edge of the flange shape. At the lower part of the casing 51, at the lower part of the cylindrical body, a mesh body 5 such as punched metal is provided.
A crushing chamber 52 in which the crushed material 54 is disposed is provided in the crushing chamber 52 for crushing the crushed material 54 to a size smaller than a predetermined particle size. The mesh body 53 has a mesh for dropping a pulverized material having a predetermined particle size or less, and the dropped pulverized material is separated by the vacuum tube 14 connected to the pulverizing chamber 52 into a particle size sorting device 15 (FIG. Sent to 1).

An intermediate cover 59 is provided at an intermediate portion in the vertical direction inside the casing 51. The intermediate lid 59 is rotatably mounted on the casing 51 with the support shaft 58 as a fulcrum, and is closed by an air cylinder (not shown) to partition the internal space indicated by a solid line in FIG. And an open position indicated by a two-dot chain line. The cylindrical powder trap member 61 is fixed to the peripheral surface of the inner wall of the casing 51 close to the peripheral end of the upper surface of the intermediate lid 59 in the closed position. This powder trap member 61
Has a shape in which the lower part is inclined so as to enter inward, and covers the upper surface peripheral portion of the intermediate lid 59. A soundproof wall 55 is provided around the outer periphery of the casing 51.

An upper cover 62 for opening and closing the charging port 56 of the casing 51 is attached to the moving unit 64 so as to be able to move up and down so as to open and close the charging port 56. As shown in FIG. 5 (left side view in FIG. 4), the support unit 65 having a U-shaped frame shape is configured such that rollers 66 at both lower ends thereof roll on a pair of guide rails 67. To move. As shown in FIG. 4, both guide rails 67 have a length that allows the support frame 65 to move between a position facing the insertion port 56 and a side position of the casing 51.

An air cylinder (a type of upper lid opening / closing mechanism) 68 is mounted on the upper surface of the center of the support frame 65, and the upper lid 62 is fixed to a rod 69 of the air cylinder 68 which penetrates the support frame 65 and hangs down. ing. Therefore, the upper lid 62 opens and closes the inlet 56 by the operation of the air cylinder 68. As shown in FIG. 5, a guide shaft 60 is attached to the upper lid 62 on both sides of the rod 69, and the guide shaft 60 is inserted through a guide bush 70 attached to the support frame 65.
The upper cover 6 is formed by the guide shaft 60 and the guide bush 70.
2 is guided to move up and down stably. FIG.
The end of the second conveyor 10 is located on the opposite side of the moving direction of the moving unit 64 and above the upper limit position of the upper lid 62.

FIG. 6 is a longitudinal sectional view showing the particle size sorting device 15. The particle size sorting device 15 includes, from above, a large grain transport path 71, a predetermined grain transport path 72, and a small grain powder transport path 73.
Are provided in three stages parallel to each other and inclined obliquely downward from a position below the hopper 16. The large grain conveying passage 71 has a predetermined particle size d1 of the crushed material 54 from the hopper 16.
The following pulverized materials 54b, 54c and 54d are dropped into the predetermined particle conveying passage 72 to sort out large-sized pulverized materials 54a. The predetermined-grain transport passage 72 drops the small-grain pulverized material 54c and the finer powder 54d having a lower limit d2 that is smaller than the predetermined particle size by a certain value and the finer powder 54d onto the small-grain powder transport passage 73, and sets the predetermined particle size range d1 to d2. The crushed material 54b having a predetermined grain size is selected. Each of the transport passages 71 to 73 is provided with a vibration by a spring member 75 which expands and contracts by receiving a rotational force of a motor 74.

A powder removing device 17 for removing the powder 54e adhering to the surface of the pulverized material 54b having a predetermined particle size range d1 to d2 is disposed downstream of the predetermined particle conveying passage 72. The powder removing device 17 transfers dry air (a type of fluid) E from an air supply source 76 to a predetermined grain transport passage 72.
The dry air E is sprayed obliquely upward so as to be opposed to the pulverized material 54b flowing obliquely downward along the predetermined grain conveying passage 72 by spraying from the nozzle portion at the tip of the pipe 78 inserted therein. . The dried air E removes the powder 54e adhering to the surface of the crushed material 54b of a predetermined grain size to obtain a recycled resin material 79. The recycled resin material 79 is stored in the storage box 19.

Above the large grain transfer passage 71, the powder 5
A dust collector 80 for sucking and removing 4e is provided.
A magnet 81 for adsorbing and removing iron and the like is provided on the lower surface on the downstream side of the predetermined grain transport passage 72. Also,
The hopper 16 is provided with a control valve 82 for controlling the amount of the crushed material 54 dropped.

Next, the operation of the above embodiment will be described. In the work place of the injection molding machine 1 shown in FIG. 1, when an operator puts a defective resin product or an unnecessary material 29 such as a gate runner or a burr into the box 7, this unnecessary material 29
And is loaded into the large crusher 9 from the loading port 30. When a predetermined amount of the unnecessary object 29 is charged, the first conveyor 8 stops, and the air cylinder 48 at the top of FIG.
The upper door 45 moves to the left in FIG.

Next, the hydraulic cylinder 37 operates to move the movable cutter C2 from the solid line position in FIG. 2 to the two-dot chain line position, and the unnecessary object 29 is crushed by the movable cutter C2 and the fixed cutter C1. With both cutters C
1, cut by C2 and roughly ground. At this time, since the movable-side blade 32 has a shape inclined rearward from the center toward the four sides, the cut portion due to the engagement with the fixed-side blade 31 gradually moves from the center to the four sides. The unnecessary material 29 is smoothly pulverized.

When the crushing of the unnecessary material 29 by the large crusher 9 is completed, the lower air cylinder 48 operates so as to suck the rod, the lower door 46 moves rightward in FIG. Then, the pulverized material 54 obtained by pulverizing the unnecessary material 29 falls on the second conveyor 10. At this time, in the small crusher 11, as shown by a two-dot chain line in FIG. 4, the moving unit 64 retracts to the side of the casing 51 with the upper lid 62 pulled up, and the charging port 56 is opened. , The intermediate lid 59 is stopped at the position rotated upward as shown by the solid line in FIG.
1 is closed so as to partition the internal space in the middle. Therefore, the pulverized material 54 supplied from the second conveyor 10 to the input port 56 is once collected on the intermediate lid 59.

When a predetermined amount of the crushed material 54 is charged, the second conveyor 10 is stopped, and the moving unit 64 is moved rightward from the position indicated by the two-dot chain line in FIG. 4 by driving a motor (not shown). And stops above the inlet 56 indicated by the solid line. Next, the air cylinder 68 operates so that the rod 69 protrudes, and the upper lid 62 is pressed against the sealing material 57 as shown by a solid line in FIG. Subsequently, the intermediate lid 59 is rotated downward as shown by a two-dot chain line to put the pulverized material 54 into the pulverizing chamber 52, and then rotated upward again to interpose the inner space of the casing 51 in the middle. Close with. After that, rotary cutter 1
2 rotates to start pulverization of the pulverized material 54.

By the way, when crushing by the rotary cutter 12, an extremely loud noise is generated, and the noise may not be sufficiently suppressed only by the soundproof wall 55. But,
In the above embodiment, the upper lid 62 is pressed against the sealing material 57 to seal the charging port 56, and the intermediate lid 56 partitions the inner space of the casing 51 at the middle to close the upper opening of the rotary cutter 12. In addition, the noise at the time of pulverization by the rotary cutter 12 can be sufficiently suppressed so as not to go out of the casing 51.

Most of the powder generated and fluttered during the pulverization by the rotary cutter 12 is blocked by the intermediate lid 59, and the powder that has passed through the gap between the periphery of the intermediate lid 59 and the inner wall of the casing 51 is also removed. After being dammed by the trap member 61 and deposited on the upper surface of the intermediate lid 59, the intermediate lid 5
Next, when 9 rotates downward, it falls into the crushing chamber 52. That is, it is possible to prevent the powder from rising upward in the casing 51.

The powder producing apparatus 13 has a structure in which two types of crushing means, a large crusher 9 and a small crusher 11, are connected in series, and the unnecessary material 29 is roughly crushed by the large crusher 9. Thereafter, the material is crushed by the small crusher 11 to a size smaller than a predetermined particle size. Therefore, the pulverizing time can be reduced as compared with a case where the unnecessary material 29 is pulverized to a size smaller than a predetermined particle size by using only the small crusher 11, for example. In addition, since the powder is mainly generated in the small crusher 11, the amount of the generated powder decreases as the pulverization time in the small crusher 11 is reduced.

From the small crusher 11 to the vacuum pipe 1
The pulverized material 54 fed into the hopper 16 of the particle size sorting device 15 of FIG. 6 through the filter 4 is dropped on the large grain conveying passage 71 by a constant amount by the control valve 81, and is sorted according to the size. It flows down obliquely downward along each of the transport passages 71-73. Large crushed material 54a exceeding a predetermined particle size d1
Flows down along the large grain conveyance passage 71 and is collected at the lower part.
It is returned to the small crusher 11 via a manual operation of a worker or a transport path. The pulverized material 54 having a particle size lower than the lower limit d2
b and the finer powder 54 d
Collected through and discarded.

In the predetermined grain conveying passage 72, the dry air E is blown obliquely upward from the downstream side along the conveying passage 71 in opposition to the pulverized material 54b in the predetermined particle size range d1 to d2 flowing downward obliquely. Therefore, the pulverized material 54b is slightly pushed back, mixed sufficiently with the subsequent pulverized material 54b, sufficiently agitated, and slightly blown up while rubbing each other, and the powder 54e adhered to the surface of the pulverized material 54b.
Is blown off by the dry air E. The blown powder 54e is sucked by the dust collector 80 and discharged to the outside. It should be noted that a considerable amount of the powder 54 e is also supplied by the vibration imparted by the spring member 75,
It is shaken up.

The pulverized material 54b within the predetermined particle size range d1 to d2
The resin reclaimed material 79 obtained by removing the powder 54e adhering to the surface of the storage box 19 is once collected in the storage box 19,
It is supplied to the material tank 23 by the vacuum tube 21 of FIG. 1 and is mixed with the new pellets. This resin recycled material 79
Because the powder 54e that has adhered has been removed, the resin product obtained by reusing the resin reclaimed material 79 as a part of the molding material may have a higher mixing ratio with respect to new pellets. Almost no defects such as voids, silver, and burns occur.

According to the results of actual measurement, even if the weight ratio of the recycled resin material 79 to the total amount of the recycled resin material 79 and the new pellets, that is, the mixing ratio is increased to 50%, almost no defects occur. Since the ratio of the unnecessary materials 29 generated in the actual process to the resin product is about 10% by weight, all the generated unnecessary materials 29 can be reused. Moreover, the use of the recycled resin material 79 does not need to be limited to only resin products whose appearance is not required. Therefore, unnecessary object 2
9 can be automatically fed to the material tank 23 to form a series of production lines. On the other hand, conventionally, since it is necessary to limit the use and control the mixing ratio, a series of production lines cannot be configured.

As the fluid to be sprayed on the pulverized material 54b in the predetermined particle size range d1 to d2, the dry air E shown in the above embodiment is most suitable from the viewpoint of cost and the like.
A liquid such as hexane which is highly volatile and does not adversely affect the properties of the resin can also be used. In addition, as applicable resin, in addition to the ABS resin used in the above-described example,
Examples include polyethylene and polypropylene.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an entire apparatus for manufacturing a resin recycled material for molding according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing details of a large crusher shown in FIG. 1;

FIG. 3A is a view of the movable cutter of FIG.
FIG. 3B is a cross-sectional view taken along the line BB of FIG. 2, and FIG.

FIG. 4 is a longitudinal sectional view showing details of a small crusher shown in FIG. 1;

FIG. 5 is a left side view of the upper configuration of FIG. 4;

FIG. 6 is a longitudinal sectional view showing details of a particle size sorting device and a powder removing device of FIG. 1;

[Explanation of symbols]

9: Large crusher, 11: Small crusher, 12
... granule size sorting device, 13 ... pulverized material making device, 17 ... powder removing device, 29 ... unnecessary material, 31 ... fixed cutter, 32 ... movable cutter, 51 ... casing, 54 ... crushed material, 54b
... sorted crushed material, 54e ... powder, 59 ... intermediate lid, 6
DESCRIPTION OF SYMBOLS 1 ... Powder trapping member, 62 ... Upper lid, 64 ... Moving unit, 68 ... Air cylinder (upper lid opening / closing mechanism), 72 ... Transport path, 79 ... Resin recycled material, E ... Dry air (fluid),

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 61-130342 (JP, U) JP-A 4-87778 (JP, U) JP-A 63-197645 (JP, U) (58) Survey Field (Int.Cl. ⁶ , DB name) B29B 13 / 10,17 / 00

Claims (4)

(57) [Claims] 1. A particle for selecting a crushed material obtained by crushing an unnecessary material generated at the time of molding of a resin product to a predetermined particle size or less.
And a powder removal device for spraying a fluid on the pulverized material selected by the particle size separation device to remove powder adhering to the pulverized material.
Device, wherein the particle size sorting device causes the pulverized material to flow down diagonally downward.
And the powder removing device is configured to prevent the pulverized material flowing down the transport passage from flowing.
An apparatus for manufacturing a reclaimed resin material for molding , which sprays a fluid diagonally upward . 2. The method according to claim 1, further comprising:
Unnecessary materials generated during molding are ground to a specified particle size or less
A crushed material producing device for producing crushed material, and the crushed material producing device roughly crushes unnecessary materials.
Crusher and crushed material by this big crusher
Composed with a small crusher that grinds to a specified particle size or less.
The crusher crushes unnecessary objects from both sides.
It has a fixed cutter and a movable cutter to crush,
The small crusher is powdered by the large crusher.
An apparatus for manufacturing a recycled resin material for molding, which includes a rotary cutter for crushing crushed material. 3. The small crusher according to claim 2, wherein the crushed material from the large crusher is supplied from an inlet at an upper end.
A casing to be charged, and a pulverized material provided at a lower portion in the casing to crush predetermined particles.
A rotary cutter for milling degrees or less in size, self-rotate the fulcrum at one end portion to the intermediate portion of the inner wall of the casing
Installed inside the casing to open and close the internal space of the casing
Intermediate lid, and an inclined state in which a lower part faces inward above the intermediate lid
And fixed to the inner peripheral wall surface of the casing,
A powder trapping member that covers a peripheral portion of an upper surface, and an upper lid that opens and closes the charging port of the casing.
Molding resin regeneration material manufacturing apparatus are. 4. The case according to claim 3 , further comprising:
Between the position corresponding to the loading slot and its side position.
A moving unit that moves,
A lid is provided so as to be movable up and down, and the casing is moved downward by moving the upper lid to the moving unit.
Block the charging port, pull up the top lid and close the charging port.
An apparatus for manufacturing a reclaimed resin material for molding, which is provided with an opening / closing mechanism for opening the upper lid .