JPS6028505Y2 - Coarse crusher - Google Patents

Description

[Detailed description of the invention] This invention relates to a plastic runner coarse crusher.

When manufacturing plastic products using plastic injection molding methods, runners are always created.

Runners can be collected, crushed and reused.

Conventionally, runners were directly fed into a crusher to be crushed into fine particles.

One stage of pulverization was used to convert the raw material into granular recycled raw materials.

Runners have various shapes depending on their placement within the product mold, but all of them are quite long and bulky.

Since the runners are directly fed into the crusher, the input port of the crusher must be wide, and the rotating main shaft must be long horizontally.

Since the crusher must finely crush the runner, the rotating main shaft rotates at high speed.

A plurality of rotating blades are attached to the rotating main shaft without gaps, and these blades rotate inside a cylindrical casing.

The gap between the rotating blade and the casing is narrow.

The runner is crushed by shearing force between the outer peripheral surface of the rotary blade and the inner surface of the casing.

As the particles roll through narrow gaps, they become microscopic particles.

In other words, the outer peripheral surface of the rotating blade crushed and tore the runner.

In order to obtain small particles, it was necessary to rotate at high speed, and moreover, a large amount of horsepower was required.

Conventional runner crushers often have a rotation speed of 1000 times per minute or more and a driving force of 5 to 10 horsepower.

Such a runner crusher requires a large driving force and has a high rotational speed, so it generates a lot of noise.

Noise is undesirable because it worsens the working environment in factories.

Furthermore, when a plastic molding machine is operated automatically at night, the runners are sent one by one to a crusher, but the crusher generates a lot of noise, so it is extremely fast.

It is desirable to suppress noise more strictly at night.

In order to solve these drawbacks, the present inventor invented a device that roughly cuts the runners before feeding them into the crusher (Japanese Patent Application No. 101725/1989).
8-3654).

It is tentatively called a runner crusher.

This cuts the runner into several small pieces, not crushes it into tiny particles.

The runner crusher devised for the first time by the present inventor consists of a horizontally supported rotating main shaft, about 4 to 7 rotating blades fixed to the rotating main shaft at intervals, and a side surface of the rotating blade. It consists of the same number of fixed blades that are fixed in close proximity and a side movement mechanism that rotates the rotating main shaft at a low speed of 3 to 20 times per minute.

A plastic injection molding machine ejects one runner per cycle.

The runner is hot and soft, so it is easily cut between the rotating blade and fixed blade of the runner crusher.

The cut runner pieces are stored in a suitable container and later placed in a well-known runner crusher to be crushed into fine particles.

Plastic raw materials recycled in this way can be used again.

The runner was crushed in two stages.

However, as it is, it is troublesome and inconvenient.

This is because the coarsely crushed material must be fed into the crusher again.

One drawback is that the energy saving effect is small.

If the material that has been coarsely crushed in advance is placed in a crusher with the same horsepower as conventionally used, it will not result in any savings in electricity costs.

The present invention aims to solve these drawbacks.

The coarse crusher of the present invention has a runner coarse crusher invented by the present inventor on top of the crusher, and the two are integrated.

Furthermore, instead of driving both separately, we decided to use one motor to drive both at the same time.

Hereinafter, the structure, operation, and effects of the present invention will be explained with reference to drawings showing examples.

FIG. 1 is an overall front view of a coarse crusher according to an embodiment of the present invention, and FIG. 2 is an overall right side view.

The coarse crusher is a crusher B with a coarse crusher A attached on top of the crusher B.

Shredder B is well known.

The coarse crusher A was invented by the present inventor.

First, the part of the coarse crusher A will be explained.

FIG. 3 is a plan view of only the crusher A (illustrated without the guide cover).

FIG. 4 is a front view of only the coarse crusher A with the cover removed.

FIG. 5 is a left side view of the coarse crusher A.

A crusher A for crushing runners has a rotating main shaft 1 that is supported horizontally, an appropriate number of rotating blades 2 that are fixed to the rotating main shaft 1 at intervals, and a number of rotating blades 2 that are close to the side surface of the rotating blades 2. It consists of the same number of fixed blades 3 that are fixed to each other, and a drive mechanism C that rotates the rotating main shaft 1 at a low speed.

The drive mechanism C is common to the crusher A and the crusher B.

The base 4 is a combination of vertically elongated iron frames, on which a crusher B1 is installed below and a coarse crusher A is installed above.

A motor 6 is attached to the lower part of the base 4 with bolts 5.

A first pulley 7 is fixed to the rotating shaft of the motor 6.

The rotational force of the first pulley 7 is transmitted to the second pulley 9 by the belt 8.

The speed is reduced between the first pulley 7 and the second pulley 9.

The second pulley 9 is fixed to the crusher main shaft 10 of the crusher B.

The crusher main shaft 10 passes horizontally through the crusher body, and is connected to a sun gear (input) of a planetary gear reducer 11 at the other end.

The output of the reducer 11 appears on the reduction shaft 12.

The reduction ratio is 1120 in this example.

It has two planetary gears with reduction ratios of 1/4 and 175.

A first sprocket 13 is fixed to the end of the reduction shaft 12.

The rotation of the first sprocket 13 is controlled by the chain 14 stretched in the vertical direction.
5.

The second sprocket 15 is fixed to the end of the rotating main shaft 1.

In this way, the driving force of the motor 6 is applied to the rotating main shaft 1 of the crusher A.
It will be transmitted to

The rotating main shaft 1 is rotatably supported by pillar blocks 16 and 17 on the left and right sides.

The pillow block 16.17 is fixed to the base 4 by bolts 18.19.

A cylindrical spacer 20 is interposed between the rotary blades 2 and passed through the rotary main shaft.

The rotary blade 2 is prevented from rotating relative to the rotary main shaft 1 by a key 21.

The rotary blades 2, . . . , spacers 20, .

A fixing metal fitting 25 attached to the upper stage of the base 4 with a set screw 24 fixes the fixed blade 3 with a set screw 26.

In this example, the fixed blade 3 is a simple straight blade,
The blade may be appropriately curved.

The rotary blade 2 and the fixed blade 3 are provided so as to be in contact with each other on the side surfaces, and the runner is cut at this contact portion.

Either the rotary blade 2 or the fixed blade 3 must have a sharp blade surface.

In this example, the rotary blade 2 is provided with an oblique blade surface 27 having an acute angle.

A blade surface may be attached to the fixed blade 3.

A guide cover 2 surrounds the rotating main shaft 1 from the front, rear, left and right sides.
There are 8.

The guide cover 28 becomes an entrance into which the runner R is introduced.

FIG. 6 is an enlarged view of the vicinity of the rotary blade 2.

In this figure, the rotary blade 2 rotates clockwise.

In this example, the rotary blade has three-fold symmetry and has three cutting sections.

A rotary blade having two-fold symmetry or four-fold symmetry may be used.

A main shaft through hole 30 and a keyway 31 are bored in the center of the rotary blade 2.

The shape of the cutting portion is such that the retracting inclined blade surface 32 and the outwardly inclined surface 33 forming an acute angle with respect to the retracting inclined blade surface 32 are cut out from the disk.

The retraction inclined blade surface 32 connects the protrusion 34 at the tip with the cutting recess 35 at the inner depth, and cuts the target object that hits this surface.
It is slanted so that it pulls inward as it rotates.

In other words, the retraction inclined blade surface 32 forms an angle θ in the rotational direction with respect to the radial direction, and is an inclined blade surface that once draws the object inward under centrifugal force.

The average retraction angle θ is 45° in this example.

The horizontally long runner is drawn inward by the retracting inclined blade surface 32 and cut between the cutting recess 35 and the fixed blade 3.

The outwardly inclined surface 33, the protrusion 36, and the outer periphery 37 following the cutting recess 35 do not contribute to cutting.

The plurality of rotary blades 2 are attached to the rotary main shaft 1 so that their phases are different from each other.

For example, when five rotary blades are used as in this example, the phase of each rotary blade may be shifted by 24 degrees.

However, it is better to make this phase shift random, rather than giving it one unit at a time starting from the end.

If the phase shift is applied sequentially from the end of the rotary blade, the rotary blade will sit on one spiral, and when the runner R is introduced, there is a possibility that the runner R will be cut in a one-sided state. becomes larger.

If you cut it with one side stuck, you may end up cutting it incorrectly.

Therefore, it is better to give the phase shift randomly.

The number of rotating blades is preferably about 4 to 8.

The diameter of the rotary blade is 100-25.

The thickness is approximately 10 to 257 FF.

The rotation speed is about 3 to 2□□□/minute.

Here are two examples.

[Example 1] Motor horsepower 1/4 horsepower, rotation speed 6 times/min, runner inlet 365 x 460 mm, rotary blade diameter 13
07F! ll.

The width of the rotating blade is 12 mm, the number of rotating blades is 6, the number of fixed blades is 6, and the crusher weighs 45 kg.

[Example 2] Motor horsepower 172 horsepower, rotation speed 7 times/min, runner inlet 500 x 640 mm, rotary blade diameter 200 mm
rra, width of rotating blade 2orrrln, number of rotating blades 6,
The number of fixed blades is 6, and the crusher weight is 165 kg.

The structure of the coarse crusher A has been explained above.

Next, the crusher B will be explained.

Runner crushers are already widely used and well known.

FIG. 7 is a partially vertical front view of the crusher B only.

FIG. 8 is a partially vertical right side view of the crusher B.

The crusher B has a hopper 40 that is wide open upward, and the coarsely crushed runner pieces are sent from the hopper 40 to the casing 4.
Fall into 2.

Hopper 40 is fixed to casing 42 with bolts 43.

Four rotary blades 44 are lined up in a space in the casing 42 without gaps, and are fitted into the crusher main shaft 10 via a key 41.

A flange portion 45 is provided at the end of the enlarged diameter portion of the crusher main shaft 10.

The rotary blade 44 is held together between a flange portion 45 and a holding nut 46.

In order to close the cylindrical space of the casing 42 from both sides,
Support discs 47, 48 abut the casing from both sides.

A reduction gear case 49 is provided outside the support disk 48 .

Stoppers 50, 51 secure the support discs 47, 48 to the casing 42.

The crusher main shaft 10 is rotatably supported by bearings 52 and 53 on support discs 47 and 48.

The second pulley 9 that transmits power from the motor 6 to the crusher is
It is attached to the crusher main shaft 10 via a key 54 to prevent rotation, and is prevented from being removed by a screw 55.

A planetary gear reducer 11 is provided in the reducer case 49 .

This is a system in which two planetary gears 56 and 57 are directly connected in two stages.

In this example, a reduction ratio of 1/lK115 is used, so the reduction ratio is 1120.

The outer shell gear of the planetary gear reducer 11 is fixed to the reducer case 49 with bolts 58 .

The decelerator case 49 is fixed to the crusher casing 42 by locking bolts 59.

The output of the decelerator 11 is taken out by the deceleration shaft 12.

The deceleration shaft 12 is supported by a bearing 60 so as to be fixed to the decelerator case 49 .

In order to transmit power from the crusher B to the coarse crusher A, a first sprocket 13 is fixed to the reduction shaft 12 with a key 61 and a screw 62.

The casing 42 of the crusher B is split with respect to a horizontal line including the center of the main shaft, and the upper half of the casing can be opened.

This is to clean the rotating blade and the inside of the casing.

For this reason, the upper and lower casings are connected by a horizontal pivot pin 69 provided at the front.

When the upper and lower casings are closed, to secure them both,
On one side of the casing, a rigid bolt 70 is pivotally mounted with a pin 71 with respect to the lower casing.

The upper casing is held down by a nut 72 that is screwed into a rigid bolt 70.

A hard bolt 73 is installed near the pivot pin 69 of the casing.
is fastened to the lower casing with a pin 74.

A nut 75 is screwed onto the upper end of the rigid bolt 73 and holds down the upper casing surface.

To open the crusher B, loosen the nuts 72.75, push the rigid bolts 70.73 outward and remove them from the upper casing.

After this, the upper casing is lifted and opened around the pivot pin 69.

The rotary blade 44 of the crusher is shown in FIGS. 9 and 10.

In this example, the thickness is 25rrr! The diameter to the outermost edge of n1 is 118-Irr! It is n.

Four locations serve as blade portions 81. At the center is the crusher main shaft 1
A shaft hole 82 through which 0 is passed is bored, and a keyway 83 is carved therein.

The base portion 85 on which the crusher A is mounted is secured by pins 84.
It is pivotally connected to the lower part of the base, and the other end of the base part 85 is latched by a latch 86 and a hook 87.

The sprockets 13, 15 and chain 14 are covered with a chain case 90.

A storage box 91 for storing crushed plastic particles is provided below the crusher B.

This can be pulled forward.

Casters 92 are attached to the bottom of the base 4 so that the entire device can be easily moved.

The operation of the above configuration will be explained.

The runners discharged from the plastic injection molding machine are fed into the crusher A one by one.

The rotating blade 2 and the fixed blade 3 cut the runner into several pieces.

The cut pieces fall through the hopper 40 of the crusher B and enter the crusher casing 42.

The cut pieces are ground many times between the rotating blade 44 and the inner wall of the casing to become fine particles.

These plastic microparticles are reused.

Describe the effects.

(1) Instead of putting the runner directly into the crusher, it is roughly crushed before being put into the crusher.

The input port of the crusher can be small, and even a small crusher can be used.

In this example, the input port of the crusher is 10100mm x 110mm.
It is.

This is sufficient since it has been cut in advance to a length of 100rrfIL or less.

If the crusher used was a 3 horsepower crusher, this can be reduced to 1 horsepower.

Since the power of the crusher is 174 to 172 horsepower, power consumption can be reduced.

(2) Since the crusher is smaller, noise and vibration can also be suppressed.

(3) Since the drive motor for the coarse crusher and crusher is common,
Both are operated and stopped at the same time.

The strongest reaction occurs in the crusher at the moment the runner is introduced.

Furthermore, the runner must be loaded into the crusher while the rotary blades are rotating.

This is because the runner is jammed and cannot start rotating.

Since the coarse crusher and crusher are operated at the same time, the crusher has
Only coarsely crushed items will arrive.

This is because the coarse crusher A does not pass the runner downward even if it is thrown in when the crusher A is stopped.

An example of rotation speed will be described.

When the frequency of the commercial power supply is 50H2, 60Hz, the coarse crusher rotates at 9.7 times/min, 11.6 times/min, and the crusher rotates at 792 times/min, 94 times/min.

[Brief explanation of drawings]

FIG. 1 is an overall front view of a coarse crusher according to an embodiment of the present invention. Figure 2 is an overall right side view of the same thing. FIG. 3 is a plan view showing only the crusher with the guide cover removed. FIG. 4 is a front view of only the coarse crusher with the guide cover removed. Figure 5 is a left side view of only the coarse crusher. FIG. 6 is a side sectional view of only the vicinity of the rotary blade of the crusher. Figure 7 is a partially longitudinal front view of the crusher only. Figure 8 is a partially vertical right side view of only the crusher. FIG. 9 is a side view of the rotary blade of the crusher. FIG. 10 is a front view of the rotary blade of the crusher. A... Crusher, B... Crusher, C...
... Drive mechanism, 1 ... Rotating main shaft, 2 ...
...Rotating blade, 3...Fixed blade, 4...
Base, 5... Bolt, 6... Motor,
7...First pulley, 8...Belt, 9
...Second pulley, 10...Crushing machine main shaft, 11...Planetary gear reducer, 12...
Reduction shaft, 13...First sprocket, 14...
...Chain, 15...Second sprocket, 16,17...Pirola block, 18,19
...Bolt, 20...Spacer, 21
...Key, 22.23...Tightening nut, 24...Set screw, 25...Fixing bracket, 26...Set screw , 27... Slanted blade surface, 28... Guide cover, 30... Spindle through hole, 31... Keyway, 32...
Retraction inclined blade surface, 33...Outward inclined surface, 34.
...The hook is the protrusion, 35...The cutting recess, 3
6...Protrusion, 37...Outer periphery, 40.
...Hopper, 41...Key 42...
...Casing, 43...Bolt, 44...
... Rotating blade, 45 ... Flange part, 46.
...Press nut, 47,48...Support disc, 52,53...Bearing, 56,57...
...Planetary gear system, 60...Bearing, 69...
... Pivot pin, 70, 73 ... Hard bolt, 8
6... Latch, 87... Hook, 91.
...Storage box, 92...Caster.

Claims (2)

[Scope of utility model registration request] (1) Crusher A that cuts plastic runners into several pieces
, a crusher B that is installed below the crusher A and crushes the cut runner pieces into fine particles, and a drive mechanism C that applies driving force from a common motor 6 to the crusher B and the crusher A. Therefore, the crusher A has a rotating main shaft 1 that rotates from 3 to 20 times per minute, an appropriate number of rotating blades 2 attached to the rotating main shaft 1 at intervals, and a rotating blade 2 that is close to the side surface of each rotating blade 2. The fixed blade 3 is fixed to the fixed blade 3, and one or both of the rotary blade 2 and the fixed blade 3 have an inclined blade surface for moving the object sandwiched between the rotary blade 2 and the fixed blade 3 inward. The crusher B
A coarse crusher is characterized in that a rotary blade 44 is attached to a main shaft 10 that rotates at high speed without any gaps. (2) The crusher main shaft 10 includes a planetary gear reducer 11, a first sprocket 13, a chain 14, and a second sprocket 15.
is connected to the rotating main shaft 1 of the crusher through a planetary gear reducer, sprocket, and chain, and the rotation of the crusher is doubly decelerated and transmitted to the crusher.Claim 1 The coarse crusher described.