KR100750348B1 - An apparatus with multiple air exhaust hole at the pressing part for reducing volume of expanded plastic - Google Patents

Abstract

A compression type volume reducing device for foamed plastic having plural air exhaust holes at a compression unit is provided to prevent the air from leaking in the axial direction of the compression unit, to effectively emit friction heat, and to prevent the foamed plastic from being stuck. A compression type volume reducing device for foamed plastic having plural air exhaust holes at a compression unit(30) is composed of: a compression chamber(21) for receiving foamed plastics; an extrusion port(24) for extruding the foamed plastic contained in the compression chamber; and the compression unit for compressing the foamed plastic contained in the compression chamber. Plural air exhaust holes are formed at a part of the compression unit coming into contact with the foamed plastic.

Description

TECHNICAL APPARATUS FOR AN APPARATUS WITH MULTIPLE AIR EXHAUST HOLE AT THE PRESSING PART FOR REDUCING VOLUME OF EXPANDED PLASTIC}

1 is a cross-sectional view of a compression reducer of a foam plastic using a conventional piston.

Figure 2 is a cross-sectional view of the compression reducer of a foam plastic using a conventional screw.

3 to 6 is a cross-sectional view showing the operating state of the compression-type container of the foamed plastic having a plurality of air discharge holes in the compression means of the present invention.

Figure 7 is a perspective view of a piston protruding in the direction of the extrusion port, an embodiment of the present invention.

Figure 8 is a perspective view of the piston recessed in the direction of the extrusion port of an embodiment of the present invention.

9 is a cross-sectional view of the piston having a plurality of air discharge holes and the air discharge hole formed in the compression means.

Figure 10 is a compression reducer of the foamed plastic formed with a plurality of air discharge holes in the screw to rotate with an embodiment of the present invention.

11 is a perspective view of a rotating screw in which a plurality of air discharge holes are formed.

<Description of the symbols for the main parts of the drawings>

Hopper: 10 Body: 20

Compression chamber: 21 Outlet: 22

Compression means Hand part: 23 Extrusion port: 24

Laminated part: 25 Compression means: 30

Piston: 32 Screw: 33

Air vent: 40 Inlet: 41

Outlet: 42 Outflow: 43

Storage space: 44 Discharge path: 45

The present invention relates to a foamed plastic compression reducer to facilitate the recycling by reducing the volume by compressing the foamed plastic, such as styrofoam.

More specifically, the present invention relates to a compression reducer of a foamed plastic, which forms an air discharge hole in a compression means for compressing a foamed plastic to facilitate the discharge of air contained in the foamed plastic leaked during compression, thereby further smoothing the compression. .

In general, expanded plastic is a general term for expanded by forming bubbles inside the plastic, and most thermosetting resins and thermoplastic resins such as vinyl, polystyrene, polyethylene, phenol resin, cellulose acetate, and urethane can be foamed. In particular, foamed polystyrene is called styrofoam, and is generally a resource-saving material in which 98% of the volume is air and the remaining 2% is resin.

Among the foamed plastics containing such foamed styrofoam, the used waste foamed plastic should be collected and transported for disposal or recycling. Since the waste foamed plastic has a large volume per unit weight, it takes a lot of logistics costs to collect and transport it mechanically. Extruders have been conventionally used to press down to reduce volume.

As such a conventional foamed plastic extruder, there is a "simplified compression type reducer" of the Republic of Korea Utility Model Registration No. 20-0251210 as shown in FIG.

The technique shown in the Republic of Korea Utility Model Publication No. 20-0251210, the waste styrofoam through the hopper (1), finely crushed waste styrofoam with a crushing roll (2) installed inside the hopper (1), The broken waste styrofoam particles are accumulated at the bottom of the compression chamber 3, and the cross-sectional area becomes narrower toward the rear of the waste styrofoam particles accumulated at the bottom of the compression chamber 3 using the piston 5 of the hydraulic cylinder 4. It was to have a configuration in which the waste styrofoam is compressed and reduced by being pushed toward the extruded opening 6 to be discharged to the outlet.

By the way, the prior art has an advantage that can be easily installed in the collection place of the waste styrofoam, can be easily compressed and reduced waste styrofoam has the following problems.

In the case of the foamed styrofoam, as mentioned above, 98% of the volume is usually air. Therefore, when compressed, air will leak out. At this time, if there is no gap to leak out of the air, the compression is not easy, and since the air is compressed at a high pressure inside the compressed styrofoam, when the air is discharged to the outlet of the container, the expansion of the compressed styrofoam explodes rapidly. Sometimes it happens.

Therefore, in order to compress the waste styrofoam effectively, it is necessary to design the reducer so that air can escape easily. Looking at the Republic of Korea Registered Utility Model Publication No. 20-0251210 and the like in the prior art, the air discharge hole is formed on the outlet wall surface in the direction of the discharge port in the compression chamber.

Even with this structure, air can be removed, but because the air outlet is formed only around the passage of the compression chamber, it is not enough to escape a large amount of air, and the leaking air tries to go out in all directions. The air coming out in the axial direction of the compression means has no place to exit, which hinders compression.

Also, generally, a large amount of frictional heat is generated during compression, and the heat is used to transfer heat to the surroundings or change the state. Accordingly, the waste plastic is melted and pressed to the compression means, or heat is transferred to the reducer to increase the temperature of the compression chamber and the like.

If the frictional heat is not removed quickly, the waste plastic may stick to the air discharge hole, which may cause a problem of clogging the hole. In addition, it is possible to explode exponentially when coming out of the outlet and to hinder a smooth compression, the temperature of the container rises may cause deformation of the device or breakage of the device.

However, according to the prior art, it is difficult to remove the frictional heat due to the lack of sufficient heat transfer space to sufficiently remove the frictional heat.

On the other hand, according to another prior art Republic of Korea Patent No. 10-0500278 using the rotating screw of Figure 2, the extruded waste styrofoam by the extrusion screw. However, even in this case, since it is described that the place where the air discharge hole is formed is on the outer wall of the cylinder to be extruded, it is difficult to discharge sufficient gas as in the above.

In addition, in the case of the rotating screw, the frictional heat is accumulated by the long time driving, the waste styrofoam is melted by the frictional heat, and the waste styrofoam is stuck to the screw, which hinders the smooth operation of the container. Although the prior art has been disclosed to cool by using a cooling jacket, this has a problem that the structure of the device is complicated, maintenance is difficult, and manufacturing cost is also increased.

The present invention is to solve the above problems of the prior art.

First, an object of the present invention is to provide a compressed reducer having an air discharge rate by forming an air discharge hole in the axial direction of the compression means causing the compression action of the foamed plastic,

Secondly, an object of the present invention is to provide a compression type reducer capable of effectively releasing frictional heat that may occur during compression reduction by applying a configuration for increasing thermal conductivity and preventing sticking of waste plastic.

The present invention to achieve the above object

Compression chamber 21 that can accommodate the foamed plastic and

An extrusion port 24 through which the foamed plastic housed in the compression chamber is extruded;

In the compression reducer of the foamed plastic comprising a compression means 30 for compressing the foamed plastic in the compression chamber,

It is characterized in that the plurality of air discharge hole 40 is formed in the portion in contact with the foamed plastic of the compression means.

Hereinafter, a detailed configuration of the present invention will be described in detail with reference to the drawings.

3 to 6 are cross-sectional views showing the operating state of one embodiment of the extruder of the foamed plastic having a plurality of air discharge holes 40 in the compression means 30 according to the present invention.

In this embodiment, the extruder of the foam plastic is composed of a hopper 10 is installed on the top and the main body 20 is connected to the hopper 10 and installed below.

The main body 20 communicates with the hopper 10 and is provided with a compression chamber 21 configured to receive a foamed plastic therein, and compression means 30 mounted on one side of the compression chamber 21 to compress the foamed plastic. ) Is the basic component.

In particular, the present invention is characterized in that a plurality of air discharge hole 40 is formed in a portion in contact with the foamed plastic of the compression means.

The hopper 10 has a top and bottom open, the shape is gradually narrowed from the upper opening to the lower opening, the lower opening is coupled to communicate with the compression chamber 21 of the main body 20. In addition, a crusher 11 is installed in the hopper 10, and the pulverizer is driven using a known driving means not shown.

Accordingly, when the foamed plastic is introduced into the upper opening of the hopper 10, it is pulverized by the grinder 11 and made into small pieces as shown in FIG. 3, and then piled apart toward the compression chamber 21.

4 shows a configuration in which a blocking plate 12 is installed to block a communication state between the hopper 10 and the compression chamber 21.

The blocking plate 12 is a rectangular plate shape of a transparent material bent at a right angle, and also made one wall surface of the hopper 10 on which the blocking plate 12 is installed is made of a transparent material, and then the bending plate 12 is bent. The rotating shaft 13 installed in the portion is mounted on the lower portion of the transparent wall surface of the hopper 10.

In addition, the rotatable clamp 14 is mounted on the transparent outer wall of the hopper 10, and the rotatable clamp 14 serves as a handle on the front side of the outer barrier plate of the vertically bent pivot block. Lock bundle 15 to be fitted is formed integrally.

In addition, a locking step 17 is formed at the boundary between the hopper 10 and the compression chamber 21 so that the edge end 16 of the inner blocking plate can be held.

Due to the configuration described above, when holding the lock block 15 and lifting the outer block plate, the inner block plate rotates to block the communication state between the hopper 10 and the compression chamber 21, and the lock block (15) is locked with a rotary clamp (14).

Such a configuration of the blocking plate is to use a conventional known art as it is, in addition to the various conventional techniques such as a flat block plate is a slide type reciprocating motion can be applied to the present invention by selecting the appropriate method according to the situation.

The compression chamber 21 is formed in an elongated tubular shape, and functionally, the compression chamber 21 may be divided into a compression means holder 23, a laminate 25, an extrusion port 24, and an outlet 22.

One side of the compression chamber 21 is equipped with a compression means 30 consisting of a hydraulic cylinder 31 and a piston 32, the piston 32 is stored in the compression means housing 23 in the compression chamber, As shown in FIG. 5, the foamed plastic accumulated in the stacking part 25 is pushed toward the extrusion hole 24 while periodically reciprocating by the driving force of the hydraulic cylinder in the compression chamber 21.

The compression means 30 is composed of a piston 32 and a cylinder 31, the part of the piston 32 in contact with the foamed plastic is the tip of the piston, the tip is protruded cross-sectional area in the direction of the extrusion port 24 There are a thing which has this narrowing shape (refer FIG. 7), and a thing which has a shape in which the cross-sectional area of the recessed space increases in the direction of an extrusion opening (refer FIG. 8).

In particular, it is a characteristic configuration of the present invention that a plurality of air discharge holes 40 are formed in a portion in contact with the foamed plastic in the compression means.

9 is an axial cross section of the piston having a plurality of air vents.

In the present invention, the air discharge hole 40 is an inlet 41 through which air from the foamed plastic is introduced,

An outlet 42 through which air flows,

Consists of an outlet passage 43 for connecting the inlet and outlet,

The outlet passage 43 is characterized in that the cross-sectional area is widened in the direction from the inlet to the outlet.

In the present invention in which a plurality of air discharge holes 40 are formed in the shape of the piston as described above, a path for discharging air discharged from the air discharge holes is required. Therefore, in the embodiment of the present invention, the interior of the compression means creates an accommodation space 44 through which air from the air discharge hole can be accommodated.

In addition, the air outlet 42 of the air discharge hole 40 formed in the piston is connected to the receiving space 44 formed in the compression means, the gas can be discharged from the compression means in the receiving space 44 A discharge passage 45 is formed.

The air discharge hole 40 is generally formed in the extrusion port 24 or the discharge port 22 and used to remove the air, which is known in the art.

However, when the air discharge hole 40 is formed in the piston 32 as described above, the gas is discharged to the piston side by the plurality of air discharge holes 40 and discharged to the receiving space via the receiving space 44 in the piston. It will exit to the outside through the passage (45).

The air discharge hole 40 is usually formed in the diameter of the inlet 41 is about 3mm, the diameter of the outlet is about 5mm. Therefore, as shown in the dotted circle of FIG. 9, the shape of the outlet passage 43 of the air discharge hole increases the cross-sectional area of the passage from the inlet 41 to the outlet 42 so that the pressure of the inlet is increased. This is much greater than the pressure at the outlet.

3 to 6, the extrusion port 24 is formed to gradually narrow the cross-sectional area of the passage toward the rear, the end portion is connected to the outlet 22. The extrusion port is a place where the cross-sectional area of the passage is gradually narrowed so that the space where the foamed plastic can exist is gradually reduced to compress the foamed plastic. Extruded spheres of such a structure is known to be well known in the art.

The outlet 22 is formed to have a constant cross-sectional area of the passage over the entire length, or is formed to gradually reduce the cross-sectional area of the passage toward the rear, it is common to form a stagnation chamber 26 at the end. This stagnation chamber 26 is made to have a plurality of air removal holes 50, which is also known to be well known in the art. The role of the air removal hole 50 formed in the stagnation chamber 26 is not different from that described above.

Another embodiment of the present invention is to use a screw 33 that rotates with the compression means shown in Figs. Even in the case of using a screw, the basic structure is not significantly different from that in the case of using the piston.

In FIG. 10, the configuration in the case of using a screw as a compression means uses a motor 35 instead of a hydraulic cylinder, and a shaft 34, which is a shaft, is mounted to the motor, and is provided on the outer diameter side of the shaft 34. In FIG. The screw 33 is formed.

The plurality of air discharge holes 40 described above are formed on the rotating blade of the screw. The shape of the air discharge hole 40 is as described above. However, unlike the compression means by the piston there is no receiving space 44 and the like connected to the outlet of the air discharge hole.

The air discharge hole 40 is connected to the space between the blade and the blade in the rear through the rotary blade of the screw. Therefore, the gas has a structure going from the space in front to the space immediately behind.

In the most preferred embodiment, as shown in Figure 11, the air discharge hole 40 is formed only within one rotation of the foremost of the rotating blade of the screw. In general, in the case of the screw, only the foremost part plays a role of pressure, and the rear blade plays a role of conveying mainly, so there is less need to remove gas generated from the foamed plastic.

Hereinafter, the operation of the extruder using the piston of the present invention will be described.

As shown in FIG. 3, when the foamed plastic is put into the hopper 10, the foamed plastic is crushed finely by the grinder 11 installed inside the hopper 10, and the broken foamed plastic piece Starts to build up on the bottom of the stack 25 of the compression chamber 21.

After all the pieces of foam plastic are stacked in the stacking part 25, the blocking plate 12 is rotated as shown in FIG. 4 to block the hopper 10 and the compression chamber 21.

Next, when the compression means 30 is driven, the piston 32 of the compression means 30 is advanced as shown in FIG. 5, and the piston 32 of the compression means 30 is applied to the stacking portion 25. The accumulated foamed plastic is pressed and compressed to continue the forward movement.

In this case, generally, a large amount of frictional heat is generated during compression, and the heat is used to transfer heat to the surroundings or to change the state. Therefore, the waste plastic is melted and pressed, or heat is transferred to the reducer, so that the temperature of the compression chamber 21 and the compression means 30 rises.

In particular, if the frictional heat is not removed quickly, the waste plastic is pressed to the air discharge hole 40, the air discharge is not smooth, there is a risk of explosive expansion when the compressed waste plastic is discharged from the outlet 22, Smooth compression can be impeded and the temperature of the reducer can rise, resulting in deformation of the device or damage to the device.

Therefore, when the shape of the tip of the piston as the compression means protrudes or is recessed as in the present invention, the surface area of the working surface contacting the waste foamed plastic is increased than that of the piston having the shape of the shape perpendicular to the direction of action of the compression means. Since heat transfer is proportional to the surface area, friction heat generated during compression can be easily transmitted to the compression means and discharged to the outside.

In addition, since the surface area of the working surface is increased, more air discharge holes 40 can be formed in the present invention. If too many air outlets are formed in a predetermined area, the structural stability of the device is weakened, and if too few are formed, the air is not smoothly discharged.

Therefore, the air discharge holes are arranged at regular intervals, and the wider the surface area, the greater the number of air discharge holes that can be formed. As a result, smooth air is discharged by the shape of the tip of the protruding or recessed piston of the present invention, so that stable and efficient compression can be achieved.

In the present invention, as shown in Figure 7, in particular, in the case of a compression means made of a piston having a shape of a tip that protrudes in the direction of the extrusion port 24, the cross-sectional area is narrow, has the following action.

When the shape of the tip of the piston protrudes in the direction of the extrusion port 24, that is, the direction in which the piston travels, the cross-sectional area becomes narrow, the force applied by the piston is constant because the pressure is proportional to the force and inversely proportional to the cross-sectional area. The narrower the cross-sectional area in contact with the foamed plastic, the higher the pressure applied to the foamed plastic. Thus, the piston 32 can more easily push the foam plastic out.

That is, as shown in FIG. 7, the tip of the piston protrudes to narrow the cross-sectional area in the direction of the extrusion port, and thus has compression means characterized in that a tip is formed. In this case, the force is concentrated and concentrated at one point, which increases the pressure applied to one point, which helps effectively advance the piston.

As the piston 32 of the compression means 30 continues the compression stroke as described above, the foamed plastic accumulated in the stacking portion 25 is gradually pushed into the extrusion hole 24, and the extrusion hole 24 is closed. Compressed as it passes

The principle that the foamed plastic is compressed in the extrusion port 24 is similar to the prior art shown in FIG.

That is, the extrusion hole 6 shown in the prior art of FIG. 1 is formed with a narrower inner diameter toward the rear, and in such a prior art, the foamed plastic passes through the extrusion hole 6 by pushing the piston 5. In the process, the compression force by the piston (5) and the pressure that the foam plastic is pressed by the narrow inner diameter of the extrusion hole 6 acts in combination, thereby compressing the foamed plastic as a whole.

The foamed plastic compressed at the extrusion hole 26 is pushed by the foamed foam at the rear, which is continuously compressed by the reciprocating piston 32 as shown in FIG. 6, and is conveyed toward the outlet 22 extending from the extrusion hole 24. do.

At this time, the compressed foamed plastic which has just exited the extruded port 24 and entered the outlet 22 has a property of restoring, ie, expanding due to the pressure of air compressed therein.

Therefore, when the diameter of the outlet 22 is formed to be constant over the entire length, when the compressed foamed plastic passes through the outlet 22, while being pressed continuously by a constant pressure by the wall surface of the outlet 22, the internal compression Since the air is gradually released and the air pressure drops, by the time it is completely discharged out of the outlet 22, it almost loses the property to expand.

Therefore, the length of the outlet should be formed long enough as the compressed foamed plastic to lose the expansion force, for example, in the case of compressing the waste styrofoam is usually formed about 2m in length.

In addition, when the diameter of the outlet 22 is formed to decrease toward the rear, the compressed foamed plastic is gradually pressed by the wall surface of the outlet 22 when passing through the outlet 22, thereby obtaining the effect of compressing once more. There is an advantage.

When the foamed plastic is passed through the outlet 22 from the extrusion port 24, the gas escapes, the shape of the outlet passage 43 of the air discharge hole is shown in the inlet ( 41, the inlet pressure is much greater than the outlet pressure because the cross-sectional area of the passage in the direction of the outlet 42 is increased.

Therefore, even when the gas flows smoothly from the inlet port 41 to the outlet port 42 due to the pressure difference, and the foamed plastic piece blocks the air discharge hole, the foamed plastic piece is rapidly discharged from the inlet port by the pressure difference. It is sucked to the side and removed.

In addition, the pieces of foamed plastic removed as described above may absorb the frictional heat generated by the compression means, which may be a means of preventing the temperature rise in the apparatus.

The gas generated from the foamed plastics applied by the plurality of air discharge holes 40 formed in the piston 32 is discharged to the piston side in the axial direction, and the air is discharged to the receiving space 44 in the piston through the air discharge holes. Are accepted. The received gas is discharged to the outside through the discharge passage 45 connected to the receiving space.

This gives a gap in which the gas escapes in the axial direction, and the air coming out of the axial direction of the compression means has no place to exit because the air leaking from the compressed and applied foamed plastic, which has been a problem in the prior art, tries to go out in all directions. It is possible to prevent the phenomenon that interferes with the compression.

Therefore, in the present invention, the amount of gas remaining in the foamed plastic is significantly reduced, and the pressure applied to the piston is reduced.

The operation of the extruder by means of a rotating screw, which is another embodiment of the present invention, will be described.

As shown in FIG. 10, the foamed plastic is crushed by the grinder 11 in the hopper 10, and the broken foamed plastic pieces start to accumulate in the compression chamber 21.

After the foamed plastic pieces are piled up, the foamed plastic pieces are caught on the blade of the screw 33 which is continuously operating and are advanced by the blade.

Next, the foamed plastic is pushed by the rear foamed plastic as it continues to move forward, the foamed plastic is gradually pushed into the extrusion port 24, and is compressed while passing through the extrusion port (24). The principle that the foamed plastic is compressed in the extrusion port 24 is similar to the prior art shown in FIG.

In other words, the extrusion hole 6 shown in the prior art of Figure 1 is formed as the inner diameter becomes narrower toward the rear, the back by the screw in the process of the foamed plastic passes through the extrusion hole 6 by the push of the screw Compressive force by the foamed plastic is pushed in and the pressure that the foamed plastic is pressed by the narrower inner diameter of the extrusion hole 6 acts in combination and the foamed plastic is compressed and reduced as a whole.

The foamed plastic 60 compressed in the extruder 26 is pushed by the foamed plastic 60 at the rear, which is continuously compressed by the rotating screw, and is transferred toward the outlet 22 extending from the extruder 26. It is accepted.

The following process will not be described because it is not different from the process of applying the extruder by the piston.

However, in discharging the gas, since the air discharge hole 40 is formed in the screw blade, the gas passes through the blade of the screw through the air discharge hole and escapes backward. In the case of the space between the screw blades in the rear, the density of the foamed plastic is lower than in the front, and the pressure is low.

In addition, the foremost portion of the blade of the rotating screw is continuously rotated, and because the pushing the plastic foam in contact with the cumulative heat of friction occurs, the plastic foam is melted and pressed to the air discharge hole (40).

At this time, the air discharge hole 40 is the same as the enlarged picture in FIG. 9 above, since the inlet 41 of the front of the blade is formed narrower than the outlet 42 of the rear side, the outlet compared to the inlet 41 The pressure of 42 is lowered, and the pressed plastic piece is sucked into the inlet 41 due to the pressure difference and exits backward, so that the hole of the screw is not clogged, and the screw blades are kept clean, and the frictional heat is reduced. By removing the contained pieces of foam plastic and gas, the deformation caused by overheating of the screw blade is prevented as much as possible.

Hereinafter, the effects of the present invention will be described.

By the configuration and action as described above, the present invention has a compression reducer of a foam plastic having a plurality of air discharge holes in the compression means as follows.

First, because the air escapes in the axial direction, the air leaking from the compressed and applied foamed plastic, which has been a problem in the prior art, tries to go out in all directions, so the air coming out in the axial direction of the compression means has to go out. This prevents the phenomenon of interfering with compression.

In addition, since the cross-sectional area of the passage from the inlet to the outlet is increased in the shape of the air discharge hole 40, the pressure of the inlet is much greater than that of the outlet, so that the gas smoothly goes from the inlet to the outlet, Even if the pressed foam pieces block the air discharge holes 40, the foam pieces are rapidly removed by the pressure difference.

Therefore, the amount of gas remaining in the foamed plastic is significantly reduced, the pressure is reduced, and the force that the piston must give for compression is also reduced to obtain a highly efficient compressed reducer.

In addition, the frictional heat is removed in the foamed plastic pieces to prevent the temperature rise in the device, thereby reducing the sticking of the foamed plastic, and improve the structural stability of the device.

Second, the shape of the piston is protruded or recessed in the direction of the extrusion port to widen the surface area of the working surface of the piston, thereby increasing the number of air discharge holes, the heat transfer rate is also increased. Therefore, air can be removed more efficiently and frictional heat can be released.

In addition, the shape of the piston protrudes in the direction of the extrusion port to have a shape that narrows the cross-sectional area of the piston, and forms a sharp pointed tip, so that the force given is concentrated to one point. Therefore, the pressure applied to one point becomes high, which helps the piston to move forward effectively, thereby increasing the efficiency of the compressor.

Third, in the case where the air discharge hole is formed in the screw, in the discharge of the gas, since the air discharge hole is formed in the screw blade, the gas passes through the blade of the screw through the air discharge hole and escapes backward.

At this time, since the air outlet has a lower pressure than the inlet, the compressed plastic piece is sucked into the inlet and exits to the rear to prevent clogging of the air outlet and keep the screw blades clean. In addition, by removing the pieces of foam plastic and gas containing frictional heat, it is possible to prevent the deformation caused by overheating of the screw blade as much as possible to obtain a high-efficiency and structural stability of the compression reducer.

Claims (6)

Compression chamber 21 that can accommodate the foamed plastic and An extrusion port 24 through which the foamed plastic housed in the compression chamber is extruded; In the compression reducer of the foamed plastic comprising a compression means 30 for compressing the foamed plastic in the compression chamber, Compression reducer of a foam plastic having a plurality of air discharge holes in the compression means, characterized in that a plurality of air discharge holes (40) is formed in a portion in contact with the foamed plastic of the compression means (30). The method of claim 1, The air discharge hole 40 is an inlet 41 through which air from the foamed plastic is introduced, An outlet 42 through which air flows, Consists of an outlet passage 43 for connecting the inlet and outlet, The outlet passage (43) is a compression reducer of a foam plastic having a plurality of air discharge holes in the compression means, characterized in that the cross section is widened in the direction from the inlet to the outlet. The method according to claim 1 or 2, The compression means 30 is composed of a piston 32 and a cylinder 31, A portion of the piston 32 in contact with the foamed plastic is the tip of the piston, the tip is protruded to have a plurality of air discharge holes in the compression means characterized in that the cross-sectional area narrows toward the extrusion port 24 The compression type container of the branch plastic foam. The method according to claim 1 or 2, The compression means 30 is composed of a piston 32 and a cylinder 31, A portion of the piston 32 in contact with the foamed plastic is the tip of the piston, the tip is recessed so that the cross-sectional area of the recessed space increases in the direction of the extrusion port 24, a plurality of air in the compression means Compression reducer of foamed plastic with discharge hole. The method according to claim 1 or 2, The compression means 30 is composed of a motor 35, a shaft 34 and a screw 33, Compression reducer of a foam plastic having a plurality of air discharge holes in the compression means, characterized in that a plurality of air discharge holes 40 are formed on the blade of the screw in contact with the foam plastic of the screw (33). The method of claim 5, The air discharge hole 40 is a compression type of foamed plastic having a plurality of air discharge holes in the compression means, characterized in that the air outlet is formed only within the portion of the screw blade rotated one end at the end of the extrusion port direction Winder.

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