JP2003088774A - Resin crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to reliably feed resin scrap such as sprues and runners to a crushing section and to thereby efficiently crush the resin scrap. SOLUTION: In a resin crusher in which on the top of a crushing section provided with a mobile cutting edge and a fixed cutting edge each of which cuts resin scrap into particles, a hopper that introduces the resin scrap into the main body attachable to or detachable from the body 10 of the crushing section is provided, a screw 40 that forcibly feeds the resin scrap into the crushing section is provided in the hopper 30. The screw 40 coincides in its axial direction with the center of the body 10 and is arranged over the substantially entire height of the hopper 30 from the opening of the body 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin crusher used for crushing resin waste materials and the like, and more specifically, it is characterized by the construction of a resin waste material feeding section in the resin crusher for crushing the resin waste material into particles. Regarding a resin crusher.

[0002]

2. Description of the Related Art Waste resin materials such as sprues and runners generated from a resin molding machine such as an injection molding machine are crushed into small pieces using a crusher, and mixed with a resin virgin material to be reused as a resin material. Various devices have been conventionally provided as devices for crushing resin waste materials. The applicant of the present invention has previously proposed, as an apparatus for crushing resin waste material, a granulator having a function of crushing resin waste material into particles (Japanese Patent Laid-Open No. 5-3056).
14 publication). While a normal resin crusher uses a rotary crushing blade and a fixed blade to crush resin waste material, the previous granulator uses a shearing blade to cut the resin waste material into particles similar to the resin virgin material. It is characterized by crushing (grinding) into uniform pellets.

[0003]

By the way, a resin crusher is often used in conjunction with a resin molding machine. In this case, resin waste materials such as sprues and runners generated by the resin molding machine are sequentially crushed by the resin crusher. It is thrown into the machine and crushed. Therefore, as the resin crusher, a product having a processing efficiency according to the discharge amount of the resin waste material generated from the resin molding machine is used. However, depending on the shape of the resin molded product, there are cases where the length of the resin waste material such as sprue, runner, etc. is long or it has a branch-like shape, so that it cannot be easily inserted from the inlet of the resin crusher. . Since resin molded products come in a variety of shapes in this way, the conventional resin molding machine has a chuck and a nipper for grasping the runner attached to the machine for taking out the resin molded product, and the runner is mounted above the hopper of the resin crusher. A device for cutting to a predetermined size is provided.

However, in the case of the method of cutting the runner with the chuck and the nipper and putting it in the hopper, the position of the runner and the like change when the product to be resin-molded changes. Therefore, the nipper is attached to cut the runner accurately. It is necessary to change the position and adjust. Such an adjusting operation is extremely complicated as an actual work, and it is necessary to prepare a chuck plate in which a chuck and a nipper are previously positioned and attached for each product. Since there are many types of resin molded products and their shapes are various, there is a problem in that it is extremely expensive to prepare a chuck plate for each product.

Further, in order to cope with various shapes of runners, it may be possible to use a resin crusher equipped with a hopper having a larger charging port. However,
Since a resin crusher with a large input port is usually a high-end model with high processing capacity, it may be necessary to use a resin crusher with a processing speed that is higher than necessary, both in terms of processing capacity and cost. There was a problem of being wasted. In particular, in the case of the above-mentioned shredder, even a small model has a high processing efficiency, so that the problem that the resin waste material cannot be input from the input port easily occurs, and it is desired that the resin waste material can be processed more efficiently. It was

The present invention has been made to solve the problems in these conventional resin crushers. The object of the present invention is to ensure that waste resin material can be thrown into the crushing portion of the resin crusher. The purpose of the present invention is to provide a resin crusher capable of efficiently treating waste resin material.

[0007]

The present invention has the following constitution in order to achieve the above object. That is, a hopper for introducing the resin waste material into the main body of the crushing processing unit in a detachable manner is provided at the upper part of the crushing processing section provided with a movable grain cutting blade for cutting the resin waste material into particles and a fixed grain cutting blade. In the above resin crusher, a screw is provided in the hopper to forcibly feed the resin waste material to the crushing processing section. In addition, in the present specification, the resin waste material includes materials such as rubber in addition to general plastic materials.

Further, the screw is arranged in the axial direction of the center of the main body so as to extend from the opening of the main body to substantially the entire height of the hopper. In addition, the casing portion of the hopper, a pair of side surface plates formed in a triangular shape extending to the side of the main body, a shielding plate attached between one side edge of the side surface plate, the other of the side surface plate. A tilting plate mounted between the side edges of the side plate, and a supporting plate mounted by opening the upper side of the tilting plate between the upper edges of the side plates, and a drive motor for rotationally driving the screw on the supporting plate. It is characterized by being attached.
Also, as a replacement hopper attached to the main body,
It is characterized in that hoppers having different opening dimensions of the opening are prepared.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will now be described in detail with reference to the drawings. 1, 2 and 3 are a front view, a side view and a top view showing a configuration of an embodiment of a resin crusher. As shown in FIG. 1, the resin crusher of the present embodiment includes a main body 10 of a crushing processing unit for waste resin material, a hopper 30 detachably attached to an upper portion of the main body 10,
The storage unit 60 is attached to the lower portion of the main body 10. The main body 10 of the crusher crushes the resin waste material such as sprue and runner into particles (grain cutting), and the hopper 30 crushes the resin waste material into the main body 1.
0 is sent to the crushing processing section, and the storage section 60 stores the resin waste material that has been cut into pieces.

The action of cutting resin waste materials such as sprues and runners into grains is due to the shearing action of the movable grain cutting blades and the fixed grain cutting blades provided inside the main body 10. Regarding the constitutions of the movable grain cutting blade and the fixed grain cutting blade in the main body 10, there is disclosed in Japanese Unexamined Patent Publication No.
Although it has the same configuration as the grain cutter disclosed in Japanese Patent No. 305614, a schematic configuration of the main body 10 will be described below with reference to FIGS.

FIG. 4 shows the internal structure of the main body 10. 12
Is a rotary crushing blade arranged on the upper part of the main body 10. This rotary crushing blade 12 has two crushing blades 12a, 12a mounted on a drive shaft that rotates in one direction. Reference numeral 14 is a fixed blade that meshes with the crushing blade 12a. The resin waste material fed from the hopper 30 is roughly crushed by the rotary crushing blade 12 and the fixed blade 14. A plurality of rotary crushing blades 12 are arranged at predetermined intervals in the axial direction of the drive shaft. The resin waste material introduced into the main body 10 from the hopper 30 is held by the side surface of the crushing blade 12 a of the rotary crushing blade 12 and crushed between the fixed blade 14.

Reference numeral 16 is a movable grain cutting blade having a large number of shear blades 16a connected to each other on the rotating shaft in the axial direction, and 18 is a fixed grain cutting blade for cutting resin waste material between the rotary blade 16a and the shear blade 16a. is there. The fixed grain cutting blade 18 is fixed to the side plate 20 a of the main body 10. While the rotary crushing blade 12 described above is driven to rotate in one direction, the movable grain cutting blade 16 is configured such that the shearing blade 16a comes in contact with and separates from the fixed grain cutting blade 18 with the center of the rotating shaft 16b as a fulcrum. Rock. The resin waste material that has been roughly crushed by the rotary crushing blade 12 and has fallen onto the movable grain cutting blade 16 and the fixed grain cutting blade 18 is oscillated by the movable grain cutting blade 16 and the shearing blade 16a and the fixed grain cutting blade. When it meshes with 18, it is crushed into particles.

The action of cutting the resin waste material by the shearing blade 16a and the fixed grain cutting blade 18 is to form the shearing blade 16a into a small blade of about several mm in accordance with the size of the resin waste material to be cut. This is done by forming a fixed grain cutting blade 18 so as to mesh with each of the shearing blades 16a. Figure 5
The perspective view and the assembly perspective view of the movable grain cutting blade 16 are shown in FIG.
The movable grain cutting blades 16 are configured such that shearing blades 16a formed in the same shape are adjacent to each other and are fixed to the rotating shaft 16b by locking metal fittings 19.

FIG. 6 shows a movable grain cutting blade 16 and a fixed grain cutting blade 18.
It is explanatory drawing which shows the effect | action at the time of cutting the resin waste material 25 into pieces. For the sake of explanation, a round bar-shaped resin waste material 25 is a movable grain cutting blade 1
6 shows a state in which it is crushed by being held between the cutting edges of 6 and the fixed grain cutting blade 18. The shearing action between the shearing blade 16a and the fixed grain cutting blade 18 is that the resin waste material 25 is sheared into a comb shape as shown in FIG. 6 (b) by the primary shearing of the shearing blade 16a and the fixed grain cutting blade 18. The protruding portion 25a remains and the shear blade 1 continues.
As shown in FIG. 6 (c), the projection 25a is sheared by the secondary shearing between the cutting edge 6a and the fixed-grain cutting blade 18, and the resin waste material 25b having a semicircular cross section remains. The primary shearing and the secondary shearing are operations performed by one swinging motion in which the movable grain cutting blade 16 meshes with the fixed grain cutting blade 18, and the waste resin material is shredded twice in this one stroke. It will be.

As described above, the crushing action of the resin waste material by the resin crusher of this embodiment is that the resin waste material is cut into pieces by the shearing action of the movable grain cutting blade 16 and the fixed grain cutting blade 18. By connecting a small shear blade to the movable grain cutting blade 16 and the fixed grain cutting blade 18, the resin waste material can be reliably caught between the blade edges and sheared. By the movable grain cutting blade 16 and the fixed grain cutting blade 18, the resin waste material can be caught between the blade tips and crushed without letting the resin waste material escape from the blade portion, so that extremely efficient crushing is possible. The longer the movable grain cutting blade 16 and the fixed grain cutting blade 18, the higher the processing capacity.
Therefore, it is only necessary to use a model suitable for the amount of resin waste material to be processed. Further, the movable grain cutting blade 16 and the fixed grain cutting blade 18 are characterized in that a crushed material with uniform particles can be obtained by the primary shearing and the secondary shearing.

In FIG. 1, reference numeral 50 denotes a cover portion for accommodating a drive portion for driving the rotary crushing blade 12 and the movable grain cutting blade 16 mounted in the main body 10. Reference numeral 52 is a motor that drives the rotary crushing blade 12 and the movable grain cutting blade 16 mounted in the main body 10. 54 is a motor 52
Is a switch for turning on and off the drive of the.

The crushed material cut into pieces in the main body 10 is the main body 1
It falls from 0 and is stored in the storage unit 60. As shown in FIG. 2, a storage tank 62 formed in a box shape with an open top is set in the storage portion 60 so as to be replaceable.
Reference numeral 64 is a discharge window provided on the front surface of the storage tank 62. When a certain amount or more of the crushed material is accumulated in the storage tank 62, the discharge window 64 opens by the weight of the crushed material and discharges the crushed material to the outside of the storage tank 62.

As described above, in the main body 10, the crushed resin material is sequentially cut by the movable cutting blade 16 and the fixed cutting blade 18. If the crushed material is fully stored in the storage tank 62, the crushed material will not be discharged downward from the main body 10, so that the crushed material is accumulated even in the crushed portion by the movable grain cutting blade and the fixed grain cutting blade, and the grain is broken. The crushed material cut into pieces by the cutting blades may be compressed one after another to become a lump or melt. Therefore, in order to avoid such a situation, when the crushed material accumulates in the storage tank 62 in a certain amount or more, the crushed material is naturally discharged from the discharge window 64 to the vicinity of the grain cutting blade. The crushed material does not collect.

In the actual operation, the amount of the crushed material accumulated in the storage tank 62 is checked at any time, and when the fixed amount of crushed material is accumulated, the storage tank 62 is replaced or the crushed material in the storage tank 62 is crushed. Move it to the storage box and set it again. It is also possible to monitor the amount of the crushed material in the storage tank 62 and stop the crushing operation or issue an alarm when a certain amount of the crushed material is accumulated.

In the resin crusher of this embodiment, the main body 10
As shown in FIGS. 2 and 3, in the hopper 30 provided on the upper part of the main body 10, the casing part attached to the upper part of the main body 10 has triangular side plates 32, 3 extending toward the side of the main body 10.
2, a shield plate 34 mounted between one side edges of the side plates 32, 32, an inclined plate 35 mounted between the other side edges of the side plates 32, 32, and an upper edge of the side plate 32. A support plate 36 attached to the upper end of the inclined plate 35, and the resin waste material is introduced into the upper portion of the main body 10 through the rectangular opening opening 38 above the inclined plate 35. Is configured. Reference numeral 39 is a window provided above the shielding plate 34. Window 39 is hopper 3
It is provided to visually check the state of 0.

As shown in FIG. 1, the resin crushing machine according to the present embodiment has a characteristic structure in which a resin waste material charged into an inside of a hopper 30 through an opening 38 of the hopper 30 is used as a main body 1.
The point is that a screw 40 for feeding to the 0 side is provided. The screw 40 is formed to have a length substantially equal to the entire height of the hopper 30, and the screw 40 is arranged in the vertical direction with its axial direction substantially aligned with the center position of the main body 10. As a result, the screw 40 is arranged over substantially the entire length from the support plate 36 to the lower position of the hopper 30. 42 is a drive motor that drives the screw 40 to rotate about its axis, and 44 is a switch that turns the drive motor 42 on and off. The drive motor 42 is fixed on the support plate 36 fixed to the side plate 32,
The screw 40 is connected to the output shaft.

The screw 40 is provided with screw blades on the outer peripheral surface of the rotating shaft for gradually pushing down the resin waste material from above the hopper 30 toward the main body 10 as the screw 40 rotates. Drive motor 4 by switch 44
2 is operated to open the opening 38 of the hopper 30.
The resin waste material that has been thrown into is forcedly fed into the main body 10 from the upper portion of the hopper 30 by the screw 40.

As described above, in the resin crusher, the size of the opening 38 into which the resin waste material is put is smaller than that of the resin waste material such as sprue and runner, and it is difficult to put the resin waste material into the opening 38. Has become. In this respect, in the resin crusher of the present embodiment, when the resin waste material is introduced through the opening 38, the screw 40 forces the resin waste material to be removed from the main body 1.
Since it is sent to 0, the waste resin is simply hopper 30
Even if the resin waste material does not reach the main body 10 when it is charged into, the resin waste material can be reliably sent to the crushing position, and thus the resin waste material can be reliably cut into pieces. In the resin crusher of the present embodiment, the screw 40 is arranged over almost the entire length from the upper part of the hopper 30 to the opening of the main body 10, so that the resin waste material is reliably fed to the opening of the main body 10.

In an actual device, a plurality of hoppers 3 having the same mounting dimensions to the main body 10 but different opening sizes 38 are used.
0 is prepared, and the hopper 30 can be exchanged as needed to set it on the main body 10. Accordingly, by exchanging the resin crusher with the same main body 10 and attaching the hopper 30, the hopper 30 is appropriately attached according to the length of the resin waste material such as the sprue and runner to crush the resin waste material. It becomes possible.

In the above embodiment, the hopper 3
Although only one screw 40 is provided in the 0 according to the center position of the main body 10, it is possible to dispose a plurality of screws 40 in the hopper 30. For example, since the resin waste material is forcibly fed from the opening 38, the opening 3
It is also possible to dispose another screw diagonally from 8 along the inclined plate 35. It is also possible to arrange a small screw on the outside of the screw 40 to further force the resin waste material to be drawn.

According to the resin crusher of this embodiment, as described above, the resin waste material is forcibly forced into the hopper 30.
By providing a screw 40 for feeding the sprue into the hopper 30, a sprue that cannot be inserted through the opening 38 of the hopper 30,
Even a waste resin material such as a runner can be pulled into the hopper 30 from the opening 38 and sent to the crushing processing section in the main body 10 to be crushed. The resin waste material fed to the opening in the upper part of the main body 10 is drawn by the rotary crushing blade 12 to the grain cutting position by the movable grain cutting blade 16 and the fixed grain cutting blade 18, and the required crushing is performed. This makes it possible to suitably crush the resin waste material that cannot be thrown in through the opening 38 of the hopper 30 by the resin crusher of this embodiment.

[0027]

According to the resin crusher according to the present invention, as described above, the sprue, the resin waste material such as the runner can be reliably fed to the crushing processing section of the resin crusher by the feeding action by the screw. Depending on the shape of the resin waste material such as the sprue and runner, it is possible to reliably crush the resin waste material even when it is difficult to input the resin waste material from the input port of the resin crusher. As a result, it is not necessary to cut the resin waste material into small pieces in advance, and it is possible to deal with resin molded products in which various shapes of resin waste material are generated. In addition, it is not necessary to select the above model with a large opening size of the charging port, and it is possible to use a resin crusher with a processing capacity suitable for the processing amount, and it is possible to save cost waste. Play.

[Brief description of drawings]

FIG. 1 is a front view showing a configuration of an embodiment of a resin crusher.

FIG. 2 is a side view of an embodiment of a resin crusher.

FIG. 3 is a top view of an embodiment of a resin crusher.

FIG. 4 is a cross-sectional view showing a configuration of a main body portion of a resin crusher.

5A and 5B are a perspective view and an assembled perspective view showing a configuration of a movable grain cutting blade provided in a main body.

FIG. 6 is an explanatory view showing a grain cutting action by a movable grain cutting blade and a fixed grain cutting blade.

[Explanation of symbols]

10 body 12 rotary crushing blades 14 fixed blade 16 movable grain cutting blade 16a shear blade 18 Fixed grain cutting blade 25 resin waste 30 hopper 32 Side plate 34 Shield 35 inclined plate 36 Support plate 38 openings 39 windows 40 screws 42 Drive motor 44 switch

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 3F075 AA07 BA01 BB03 CA06 CA09                       CC04 CC05                 4D067 EE02 GA16 GB03                 4F201 AL01 AL02 AL14 BA04 BC02                       BC12 BC25 BC37 BN29 BQ01                       BQ04 BQ16 BQ47 BQ48

Claims (4)

[Claims] 1. A resin waste material is introduced into the main body of the crushing treatment section so as to be detachable from the main body of the crushing treatment section, above the crushing treatment section provided with a movable grain cutting edge for cutting the resin waste material into particles and a fixed grain cutting edge. A resin crusher provided with a hopper, wherein the hopper is provided with a screw for forcibly feeding the resin waste material into the crushing processing section. 2. The resin crusher according to claim 1, wherein the screw is arranged over the entire height of the hopper from the opening of the main body such that the screw is aligned with the center of the main body in the axial direction. 3. A pair of side plates, each of which has a triangular shape and has a casing portion extending laterally of the main body, and a shield plate attached between one side edges of the side plates.
It is composed of an inclined plate attached between the other side edges of the side plate and a support plate attached between the upper edges of the side plate by opening the upper side of the inclined plate, and the screw is driven to rotate on the support plate. 3. A drive motor for driving is attached.
The resin crusher described. 4. The resin crusher according to claim 1, 2 or 3, wherein hoppers having different opening sizes are prepared as replacement hoppers mounted on the main body.