JPH0811135A - Volume reduction device of foaming polystyrene - Google Patents

Abstract

PURPOSE:To provide a volume reduction device of foaming polystyrene which is capable of reducing a volume by simple constitution and a fewer number of parts by covering mainly trash of the foaming polystyrene to be generated through a general household or business. CONSTITUTION:A drum 2 which is turned and driven by a motor 1 incorporated into a device is provided, a plurality of sharp cutters 3 are arranged on the inner circumferential surface of the drum 2, discharge holes 4 having arbitraty size are opened in a large number between the cutters 3, 3 and contracted and volume-reduced foaming polystyrene is discharged through the discharge hole 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a styrofoam volume reducing device which can greatly reduce the volume of styrofoam dust discharged in large quantities from ordinary households and businesses and is easy to handle.

[0002]

2. Description of the Related Art When packaging foods, precision instruments, etc., plastic containers and packaging materials are increasingly used. The plastic containers and packaging materials are turned into garbage immediately after being used. Recently, it is said that nearly 80% of the garbage generated by ordinary households is this waste plastic material. Among the waste plastic materials that have been turned into dust, styrofoam is originally a large amount and is very bulky in volume. Since this Styrofoam treatment is often done in a treatment facility such as an incinerator or landfill after being collected by a garbage truck, it is bulky until the day when this waste plastic material is collected in ordinary households. You must keep it in the closed condition. Moreover, it is necessary to transport it to the collection site by the time collection is done. Also, the processing of waste plastic materials generated from operations such as fast food restaurants, cafeterias, and supermarkets is basically the same as the processing of waste plastic materials coming out of this general household.

In order to solve the problems relating to the treatment of such waste plastic materials, some apparatuses have been proposed for treating the waste plastic materials at or near the source thereof.
Typical examples thereof are a heating combustion device and a heating melting device using a heater and gas. In addition to this, a heating and melting device using frictional heat and the like have been proposed. However, all of them are large and suitable only when a large amount of waste plastic material is generated.

In supermarkets and the like, it can be seen that collected plastic tableware trays, bottles, etc. are collected in one place and reused as recycled products, but the equipment becomes enormous and the collection cost is high. From the perspective of recycling, the cost has not reached the point where recycling is cost effective.

To overcome these problems, a method of heating and compressing with hot air and reduced pressure air has been proposed. This is because the waste plastic material is put into the waste container and the hot plastic is circulated in the treatment tank to heat and soften the waste plastic material, and the waste plastic material is compressed into blocks by the pressure difference between the depressurized air and the atmospheric pressure. It is a thing.

[0006]

However, this conventional technique has the following problems. That is, in the conventional apparatuses, a heater and an air pump are required because they are heated by hot air and compressed by air pressure, and in particular, a fan for circulating hot air is required to be made of low heat, so that the cost is high. In addition, the structure tends to be complicated due to the large number of parts.

The present invention solves the above-mentioned problems by significantly reducing the volume of styrofoam produced in a large amount in ordinary households and businesses, and also makes it easy and quick to handle. An object is to provide a styrofoam volume reducing device that can be treated.

[0008]

In order to achieve this object, the present invention provides a drum driven by a drive source such as a motor, and one or more styrofoam cutting members disposed on the inner peripheral surface of the drum. A styrofoam volume reducing device having cutting means, and a plurality of holes for discharging the processed products, which have been cut, are provided between the cutting means on the inner peripheral surface of the drum, and the drum is driven to rotate by a drive source such as a motor. A styrofoam volume reducing device in which a heating wire that generates heat above the melting point of styrofoam when an electric current is applied to the inner peripheral surface of the drum is fixedly attached, and it is preferable that the rotational speed of the drum is variable. In addition, it is appropriate to attach or process a member made of a material that prevents Styrofoam from slipping so that frictional heat is easily generated on the inner peripheral surface of the drum. A volume reduction device still Hopefully the size of a large number of holes for discharging the treated product was opened to the drum inner peripheral surface is a foam volume reduction device for a variable.

[0009]

The present invention having the above-described structure can perform the following operations. That is, since the present invention employs a technical means that has a small number of parts and enables volume reduction processing without a heating element, the cost of the apparatus can be suppressed.

Further, by selecting the diameter of the hole through which the expanded polystyrene having a reduced volume passes, a treated product of any size can be obtained, and the handling after the treatment becomes easy.

[0011]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the external appearance of a styrofoam volume reducing apparatus according to an embodiment of the present invention. FIG. 2 is a perspective view showing a drum rotatably driven by a motor incorporated in the styrofoam volume reducing device in one embodiment of the present invention. FIG. 3 is a perspective view showing a rotationally driven drum of a styrofoam volume reducing device according to another embodiment of the present invention.

1 to 3, a plurality of sharp cutters 3 are arranged and fixed at predetermined positions on the inner peripheral surface of the drum 2. A large number of discharge holes 4 of arbitrary size are provided between the cutters 3. Drum 2
As a rotational driving method, if the outer peripheral portion driving means [so-called rim drive system] of the drum 2 is adopted as shown in FIG. 3, the center of the drum 2 and the center of the driving portion do not necessarily coincide. Further, the rotation direction may be clockwise or counterclockwise.

When the volume reduction treatment of styrofoam is performed, first, the charging lid 5 is opened and styrofoam [not shown] is charged. When the operation switch 6 is turned on, the drum 2 is rotated and centrifugal force generated causes the styrofoam to be pressed against the cutter 3 arranged on the inner peripheral surface of the drum 2. Here, the centrifugal force is proportional to the mass of the charged one, and since Styrofoam has a low density, its force is also small,
It can be covered by increasing the rotation speed. When the Styrofoam is still large, it is pressed by the centrifugal force against the cutter 3 arranged on the inner peripheral surface of the drum 2, and is cut by the combined force in the radial direction and the circumferential direction. This operation is repeated until the size of the Styrofoam becomes equal to or smaller than the pitch of the cutter 3.

When the size of the styrofoam becomes equal to or smaller than the pitch of the cutter 3, it comes into contact with the inner wall surface of the drum 2 this time. In addition, the reduced styrofoam will rub against each other. Friction heat is generated here. The heat generation rate is proportional to the centrifugal force, the distribution of styrofoam on the wall surface, and the friction coefficient of the wall surface. That is, the frictional heat generated can be controlled by them.

When the temperature rise due to frictional heat exceeds the glass transition point of styrofoam, softening and shrinkage begin. In other words, the volume can be reduced simply by rotating the drum 2. Prior to that, the cutter 3 cut it to a pitch or less, so that the contracted and reduced volume of the expanded polystyrene has a certain size, and if the size is smaller than the discharge hole 4 arranged on the inner peripheral surface of the drum 2. , Discharged from there. That is, the size of the processed product discharged can be controlled by the size of the discharge hole 4.

The processed material discharged from the discharge hole 4 is discharged from the discharge port 7.
It is discharged to the outside of the device body, and its size is almost the same, and it is used as a recycled product.

Although not shown, the following means can be implemented as another embodiment of the present invention. One of them is a styrene foam volume reducing device in which a heating wire [not shown] which generates heat above the melting point of styrofoam when an electric current is applied is arranged and fixed on the inner peripheral surface of a drum 2 which is rotationally driven by a drive source such as a motor 1. is there.

The second is a polystyrene foam volume reducing device in which the rotation speed of the drum 2 is variable by frequency control by an inverter [not shown].

As a third feature, there is provided a styrofoam volume reducing device in which a member made of a material which prevents styrofoam from slipping is attached or processed so that frictional heat is easily generated on the inner peripheral surface of the drum 2.

As the fourth feature, there is provided a styrofoam volume reducing device in which the size of a large number of holes for discharging the processed material formed on the inner peripheral surface of the drum 2 is preferably variable.

[0022]

As is apparent from the above description, according to the present invention, the number of parts can be extremely reduced, which is advantageous in terms of cost. In addition, it is possible to obtain a special effect that the size of the Styrofoam-treated product after the treatment is almost the same, and the product is easy to handle even as a recycled product.

[Brief description of drawings]

FIG. 1 is a perspective view showing the external appearance of a styrofoam volume reducing device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a drum rotatably driven by a motor incorporated in a styrofoam volume reducing device according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a rotationally driven drum of a styrofoam volume reducing device according to another embodiment of the present invention.

[Explanation of symbols]

 1 Motor 2 Drum 3 Cutter 4 Discharge Hole 5 Input Lid 6 Operation Switch 7 Discharge Port

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Claims (5)

[Claims] 1. A drum which is rotationally driven by a drive source such as a motor, and one or more cutting means for cutting styrofoam, which is arranged on the inner peripheral surface of the drum. A styrofoam volume reduction device characterized in that a large number of holes for discharging the cut products are opened in between. 2. A styrofoam volume reducing device comprising a drum which is rotationally driven by a drive source such as a motor, and in which a heating wire which generates heat above the melting point of the styrofoam when an electric current is applied to the inner peripheral surface of the drum is fixed. 3. The Styrofoam volume reducing device according to claim 1, wherein the rotation speed of the drum is variable. 4. The styrofoam according to claim 1 or 2, wherein a member made of a material whose slipperiness is less likely to slip is attached or processed so that frictional heat is easily generated on the inner peripheral surface of the drum. Volume reduction device. 5. The Styrofoam volume reducing device according to claim 1 or 2, wherein the size of the plurality of holes for discharging a processed material opened on the inner peripheral surface of the drum is variable.