JPH05269741A - Method and device for producing synthetic resin regenerated material stock from recovered foamed polystyrene product - Google Patents

Abstract

PURPOSE:To obtain method and device for producing a synthetic resin regenerated material stock from a recovered foamed polystyrene product which can be processed to a stock to be regenerated to a pellet-form synthetic resin material by a method wherein foamed polystyrene products widely used for packages or the like are recovered and formed into a thin plate by a small pressurizing force. CONSTITUTION:In a method according to the invention, a recovered foamed polystyrene product obtained by heating material beads is crushed to a state approximating to an expanded particle unit of expanded and fused material beads, thereafter being compressed to a synthetic resin regenerated material stock of a thin plate form in an unexpanded state or a state approximating thereto. A crusher 10 for crushing the foamed polystyrene product as fine as approximately an expanded and fused particle unit is incorporated in the lower part of a hopper 1 connected to a compression molding chamber 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for recovering expanded polystyrene products, which are widely used as packaging materials for electric products and transport boxes for marine products, and for reprocessing them into pelletized synthetic resin raw materials. The present invention relates to a method and an apparatus for producing a synthetic resin recycled raw material from a recovered product of an expanded polystyrene product used.

[0002]

2. Description of the Related Art In recent years, expanded polystyrene products have been widely used in fields such as packaging and transportation. Used expanded polystyrene products are discharged as waste from households and factories, and incinerators for garbage. In general, they are transported to landfills and disposed of, but the expanded polystyrene product has a large capacity and is bulky and difficult to handle even if it is stored as garbage. In addition, it is difficult to incinerate it as waste, and because it has a high combustion temperature, it requires a large amount of combustion energy and has the problem of accelerating damage to the incinerator, and it also reuses used expanded polystyrene products. There is also a problem in that the disposal of waste as waste without any use is a waste of global resources, and the development of a new recycling method is a technology for packaging and transportation. Also in view of society in general as well as field only it has been strongly desired.

Recently, waste of expanded polystyrene products has been collected and pelletized synthetic resin recycled raw materials have been processed from the waste. However, expanded polystyrene products are bulky and are therefore collected or recycled to a recycling plant. Due to various problems such as troublesome labor and a large space required for transportation and storage, it has not yet reached the stage of practical application.
Therefore, the applicant of the present invention has a hopper for supplying the crushed material of the recovered expanded polystyrene product, a compression molding chamber connected to the lower portion of the hopper, and a reciprocating motion in the compression molding chamber in the axial direction so that the crushed pieces Developed a device for manufacturing synthetic resin recycled raw material from the waste of expanded polystyrene products, which consists of a press plate that is crushed into a plate, and was previously in Japanese Patent Application No. 4-5368.
I filed as No. 5, but if the expanded polystyrene product was crushed to a normal size, it would not be possible to solve the problem that a considerable amount of pressure was required to press the product until it became a thin plate and the device became large. It was

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional problems, and recovers expanded polystyrene products and recycles them into pellet-shaped synthetic resin raw materials. The present invention has been completed for the purpose of providing a method and an apparatus for producing a synthetic resin recycled raw material from a recovered product of an expanded polystyrene product capable of producing a recycled raw material with a small pressure.

[0005]

In order to solve the above-mentioned problems, the first invention is to recover the expanded polystyrene product obtained by heating the pre-expanded raw material beads in each mold. The bead is crushed to a state close to the expanded and fused foamed particle unit, and the crushed pieces are compressed to release the air, gas, and water contained in each crushed piece and are in a non-foamed or near-thin plate shape. The second invention is a method for producing a synthetic resin recycled raw material from a product of expanded polystyrene product characterized by using the synthetic resin recycled raw material as described above. The second invention is to heat the pre-foamed raw material beads in a mold. A hopper having a crusher unit installed in the lower part for crushing the recovered expanded polystyrene product recovered to a state close to the expanded particle unit in which each raw material bead is foamed and fused, and a hopper connected to the lower part of the hopper. A synthetic resin recycled raw material from a product of expanded polystyrene product characterized by comprising a compression molding chamber and a press plate which freely reciprocates in the compression molding chamber in the axial direction and crushes the crushed pieces to form a plate. Is a device for manufacturing.

[0006]

The present invention will now be described in detail with reference to the illustrated embodiments. In the figure, 1 is a hopper that is installed on a movable base 20 to store waste polystyrene foam products, 2 is a vertically-extending rectangular tube-shaped compression molding chamber that is connected to the lower end of the hopper, and 3 is a compression unit. A gate that normally closes the front end opening of the molding chamber 2, the gate 3 is freely opened and closed by driving a motor 3a, and 4 is a polystyrene foam product recovery product supplied into the compression molding chamber 2. Gate 3 of crushed pieces
It is a reciprocating press plate that crushes toward.

The press plate 4 of the embodiment is connected to a servomotor 5 which is a drive source, and is also connected to an encoder 6 and a controller 7 for detecting the amount of movement of the press plate 4, The press plate 4 is configured to move freely within the compression molding chamber 2 with a predetermined thrust by the driving of the servomotor 5. Further, the reciprocating motion of the press plate 4 is repeated so that the press plate 4 is provided at the front portion of the compression molding chamber 2. The press plate 4 is reciprocated while the moving amount is reduced by an amount corresponding to an increase in the total thickness of the regenerated raw material formed by the controller 7 as the regenerated raw material material is sequentially formed and laminated. Has been done. Further, when the signal output from the encoder 6 is input to the controller 7, according to a program input in advance, for example, an emergency stop signal is output to stop the servo motor 5 immediately.

Reference numeral 10 is a crusher device built in the lower portion of the hopper 1. The crusher device 10 is for crushing the recovered product of the expanded polystyrene product obtained by heating the pre-foamed raw material beads in the mold to a state close to the foamed particle unit in which the respective raw material beads are foamed and fused, As shown in FIGS. 2 and 3, two parallel axes 11,
A plurality of gears 12, 12 mounted on 11 are arranged so as to alternately overlap with each other between the shafts 11, 11 and rotate in a direction indicated by an arrow. By passing the polystyrene product between the rotating gears 12 and 12, the product is crushed and dropped to a state close to the foamed particle unit forcibly foamed and fused, and deposited in the compression molding chamber 2.

As the crusher device 10,
For example, 25 pieces of gears 12 having a diameter of 200 mm and a thickness of 2.5 mm are arranged as shown in FIG. 3 so that the distance between the gears is 4 mm, and the gears 12 are rotated at about 120 rpm. Needless to say, the size of 12, the pitch of teeth, the distance between the gears, the rotation speed, and the like can be arbitrarily selected according to the size of the foamed particles, the foaming degree, and the like. It is also possible to use a circular saw or the like.

[0010]

[Function] The thus constructed product is installed and used at a site where a large number of expanded polystyrene packaging boxes are put out, such as a fish market or an electric appliance store. As it is or once it is crushed to a required size and put into the hopper 1, the expanded polystyrene product is relatively easily peeled off by the crusher device 10 built in the lower part of the hopper 1. It will be crushed to a state close to the foamed particle unit or cut into a size close to it. Then, when individual crushed pieces close to the foamed particle unit as described above are supplied into the compression molding chamber 2 by a predetermined amount, in the case of a 50 times foamed product, the press plate 4 (contact pressure 8 kg / cm ² ) It is crushed by pressurization and the volume is reduced to about 1/30 to 1/15 and the thickness is 5 to 1
A plate-shaped recycled material of about 0 mm is formed in about 4 minutes.
At this time, the crushed pieces are in a state close to individual foamed particle units, in which a large number of foamed particles are fused, and voids such as when compressed while forming voids between each foamed particle. Since the air in the air does not hinder the compression, the air, gas, and water that were present in each expanded particle are immediately released through the entire surface of each expanded particle as an outlet, and no expansion or A thin plate-like synthetic resin recycled material in a close state can be manufactured in an extremely short time. Moreover, the surface of the foamed particles on the crushed surface is the crusher device 10
Since it is damaged or cut by the above, the air and the like when compressed are released very quickly. Incidentally, conventionally, it took about 20 minutes at a surface pressure of 60 kg / cm ² to perform the same treatment, and the excellent effect of the present invention has been confirmed.

In the embodiment, the stroke amount of the press plate 4 is calculated in advance and the data is input to the controller 7, so that the comparison operation between the movement amount measured by the encoder 6 and the data is immediately performed. When a press failure occurs due to the supply of crushed pieces from the hopper 1 or the inclusion of foreign matter, for example, an abnormal signal is issued to stop the servo motor 5 and display an alarm.
In this way, the regenerated raw material material compressed into a plate shape one after another is formed and layered. For example, when the total thickness becomes about 50 cm, the gate 3 of the hopper 1 is opened and discharged. After that, the gate 3 is closed again and the same procedure is repeated, so that a large number of regenerated raw material materials having substantially the same size are discharged in a stacked state. The block for recycled raw material is crushed to about 1/30 to 1/15 of its original volume, has excellent handleability, and can be stored and transported extremely compactly. Become.

[0012]

As is apparent from the above description, according to the present invention, used expanded polystyrene products are collected as pellets without being immediately discarded by incineration treatment or landfill treatment. It is possible to manufacture a plate-shaped synthetic resin recycled raw material used for reprocessing into a synthetic resin raw material with a small pressing force. The process of crushing to a state close to the attached foamed particle unit, and compressing this crushed fragment to release the air, gas, and moisture contained in it from the surface of each crushed fragment, in the state of non-foaming or near it Since it is possible to continuously perform the process of using a thin plate-shaped synthetic resin as a raw material for recycling, it is possible to easily and efficiently transfer it to the recycling plant as a thin plate with a small volume at the collection site. Transport in Ikuringu processing and
There is also an advantage that the storage and other series of recovery costs can be made extremely low. Therefore, the present invention greatly contributes to the industrial development as a method and an apparatus for producing a synthetic resin recycled raw material from a product of expanded polystyrene products, which eliminates the conventional problems.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the device of the present invention.

FIG. 2 is a side sectional view showing a main part of a crusher device in an embodiment of the present invention device.

FIG. 3 is a schematic plan view showing a main part of a crusher device in an embodiment of the device of the present invention.

[Explanation of symbols]

 1 Hopper 2 Compression molding chamber 4 Press plate 10 Crusher device

Claims (2)

[Claims] 1. A foam polystyrene product obtained by heating a raw bead pre-foamed in a mold is crushed to a state close to a foamed particle unit in which each raw bead is foam-fused and then crushed. Characterized in that compressed crushed pieces are compressed to release air, gas and moisture contained in the crushed pieces from the surface of each crushed piece to obtain a thin plate-like synthetic resin recycled raw material in a non-foamed state or close to that. A method for producing a synthetic resin recycled raw material from a product of expanded polystyrene products. 2. A crusher device for crushing the recovered expanded polystyrene product obtained by heating the pre-expanded raw material beads in a mold to a state close to the expanded particle unit in which each raw material bead is foamed and fused. ) In the lower part
(1) and a compression molding chamber connected to the bottom of the hopper (1)
(2) and a press plate (4) comprising a press plate (4) that reciprocates freely in the compression molding chamber (2) in the axial direction and crushes the crushed pieces to form a plate. Equipment for manufacturing synthetic resin recycled raw materials from materials.