JP2000218622A - Apparatus for regeneration processing of foamed resin molded article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To furthermore decrease bad smell emitted from an apparatus and to process foamed resin molded articles regardless of existence of waterdrops. SOLUTION: This apparatus has a vol. reduction means 1 which takes a foamed resin being divided into fine pieces from an intake and performs vol. reduction processing. A hopper 2 for storing the foamed resin being devided into fine pieces is connected with the intake 101 for the vol. reduction means 1 and a vent hole 111 for exhausting high temp. vapor released from the foamed resin during vol. reduction processing is opened on the vol. reduction means l and the vent hole 111 are communicated with the inside of the hopper 2 through a cooling means 300. The high temp. vapor exhausted from the vent hole is condensed and separated by cooling with water by the cooling means 300 and only the gas ingredients among them are returned to the inside of the hopper 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foamed resin molded article regenerating apparatus having a volume reducing means for taking in a fragmented foamed resin and reducing the volume of the foamed resin. The present invention relates to a foamed resin molded product reprocessing apparatus capable of effectively suppressing the occurrence of a foamed resin.

[0002]

2. Description of the Related Art Foam resins such as styrofoam are molded into various shapes because of their excellent impact resistance, heat insulation, light weight, easy processing, and low cost. It is widely and widely used in various fields as a material for transporting vegetables, packing materials for home appliances and the like, and building materials such as heat insulating materials. However, on the other hand, a large amount of used foamed resin molded products are discharged as waste materials in factories, stores, homes, and the like.

[0003] In recent years, the recycling of waste materials has come to the fore, and there have been various techniques for recycling used foamed resin molded products discharged in large quantities. Proposed.

In general, a foamed resin molded article has a problem that it is lightweight because of being a foam, but has a problem that it is bulky. In order to recycle the foamed resin molded article, means for reducing the volume is employed. .

[0005] The volume reducing means includes, for example, a Japanese Utility Model No.
No. 45713, a feed cylinder for taking in the foamed resin crushed by the crushing means and a volume reduction cylinder slightly smaller in diameter than the feed cylinder are connected to each other, as in the apparatus for regenerating a foamed resin molded product described in JP-A-45713. 2. Description of the Related Art A cylinder is known in which a screw provided with screw blades having the same pitch in the axial direction is rotatably inserted in the cylinder. The foamed resin injected into the volume reducing means is heated and melted by a heater provided on the outer periphery of the cylinder while being extruded by a rotating screw to reduce its volume, and is recycled from a nozzle port formed at one end. Is discharged as a recycled product after volume reduction processing.

However, in general, a foamed resin generates a gas containing an odor by being heated and melted to reduce the volume. For example, in the case of a styrene-based foamed resin, the odor component generated from the volume reducing means is mainly a styrene monomer. However, in a recycling apparatus for regenerating a molded article of the expanded styrene resin, the styrene component generated by the volume reducing means is used. There is a problem that the working environment is significantly deteriorated due to the monomer being diffused to the outside of the apparatus.

For this reason, a hopper for accommodating the foamed resin is connected to an intake port of the foamed resin formed in the volume reducing means, and a discharge port for discharging the internal air to a cylinder constituting the volume reducing means is opened. And providing a means for providing an air circulation system for mixing the air containing the styrene monomer inside the volume reducing means with the foamed resin introduced into the volume reducing means by connecting the discharge port with the inside of the hopper. Can be considered.

According to such means, the air containing the styrene monomer discharged from the inside of the volume reducing means is introduced into the hopper, and the styrene monomer is adsorbed on the finely divided foamed resin inside the hopper. . Then, the styrene monomer is supplied again to the volume reducing means together with the foamed resin and subjected to volume reduction processing, whereby most of the styrene monomer is confined in the recycled product and discharged to the outside of the apparatus. Therefore, if the inside of the hopper containing the foamed resin is set as a substantially closed space, the amount of the styrene monomer is balanced in the circulation system formed between the volume reducing means and the inside of the hopper. Emission of offensive odor can be significantly reduced.

[0009]

In the case where the foamed resin molded product is a container or the like that has previously contained a water-containing article such as fish or fresh vegetables, the foamed resin molded product is regenerated in a state where water droplets remain attached. May be supplied to processing equipment. When the foamed resin molded product with such water droplets attached thereto is supplied to a reprocessing apparatus, the foamed resin molded product is finely crushed and stored in the hopper as fragmented foamed resin. Because the foamed resin contains moisture,
The function of adsorbing styrene monomer, which is a malodorous component in the air discharged from the inside of the volume reducing means, cannot be sufficiently achieved, and the styrene is reduced by reducing the volume of the water-containing foamed resin by the volume reducing means. Vapor containing monomer is generated and fills the circulation system formed between the volume reducing means and the inside of the hopper.

Therefore, in this circulation system, there is a possibility that the styrene monomer will eventually become saturated and the remaining styrene monomer will be diffused outside the apparatus. When the odor is dissipated by supplying the foamed resin molded product with the water droplets attached to the reprocessing device, the worker tends to hesitate to put the foamed resin molded product with the water droplets into the device, and the water droplets adhere. Complicated work of separating the foamed resin molded product from the adhered foamed resin molded product is inevitable.

In order to cope with such a problem, it is conceivable to previously dry the foamed resin molded product. However, it is not practical because there is a problem that a separate drying operation is required, which requires a long operation time and increases the cost. .

The present invention has been made in view of such a conventional situation, and can further reduce malodor emitted from the apparatus, and can perform treatment regardless of whether or not water droplets adhere to a foamed resin molded product. An object of the present invention is to provide a reprocessing apparatus for a foamed resin molded product.

[0013]

According to a first aspect of the present invention, there is provided a foamed resin molding having a volume reducing means for taking a fragmented foamed resin from an inlet and reducing the volume. In the article recycling apparatus, a hopper for accommodating fragmented foamed resin is connected to the intake of the volume reducing means, and the volume reducing means is detached from the foamed resin during volume reduction processing. And a discharge port for discharging the high-temperature steam, and the discharge port and the inside of the hopper are communicated via a cooling means.

According to a second aspect of the present invention, the cooling means includes:
2. The foamed resin molded product recycling apparatus according to claim 1, wherein the high-temperature steam discharged from the discharge port is water-cooled, condensed and separated, and only the gas component is returned to the inside of the hopper. .

According to a third aspect of the present invention, a crushing means for the foamed resin molded article is provided below a charging portion into which the foamed resin molded article is charged, and a crushing means is provided below the crushing means. A shredding device is provided by providing a storage section for accommodating the fragmented foamed resin, and the foamed resin fragmented from the storage section into an intake port of a volume reducing means for taking in the foamed resin and reducing the volume. And a hopper for introducing the hopper into the volume reducing means is connected to form a volume reducing device. And the inside of the hopper and the inside of the storage unit are connected by a circulation duct, and the foamed resin in the storage unit is transferred into the hopper by the transfer duct and the air in the hopper is Is returned to the accommodation part by the circulation duct. An annular path is formed, and an outlet for discharging high-temperature steam desorbed from the foamed resin at the time of the volume reduction treatment is opened in the volume reducing means, and the outlet and the inside of the hopper are cooled. A recycling apparatus for a foamed resin molded product, characterized in that the apparatus is in communication with the foamed resin molded article.

According to a fourth aspect of the present invention, the cooling means includes:
4. The apparatus according to claim 3, wherein the high-temperature steam discharged from the discharge port is condensed and separated by cooling with water, and only the gas component is returned to the inside of the hopper. .

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a foamed resin molded product is formed from a foamed resin, such as a food tray, a fish box, a vegetable transport box, a packing material for home appliances, a building material such as a heat insulating material, and the like. It refers to a molded product, and in particular, here refers to a waste material of a used foamed resin molded product.

In the present invention, the foamed resin refers to a foamed resin after it has been discharged from the crushing means and before it has been put into the volume reducing means and subjected to the volume reducing treatment.

In general, foamed resins include, for example, foamed styrene and foamed polyethylene, and the apparatus for reprocessing foamed resin molded products according to the present invention is particularly suitable for use in regenerating styrofoam. In the present embodiment,
A case in which this styrofoam resin is subjected to a regeneration treatment will be described.

The apparatus for regenerating a foamed resin molded product according to the present invention has a volume reducing means for taking in a fragmented foamed resin from an inlet and reducing the volume.

In the present invention, any means for crushing the foamed resin molded product into any piece can be used as long as it can make the foamed resin molded product fine, regardless of its structure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a schematic configuration of a volume reducing device provided with a volume reducing means in a foam resin molded article regenerating apparatus according to the present invention. In the figure, A is a volume reducing device for reducing the volume by heating and melting the degassed foamed resin and degassing the resin. In the embodiment shown in this embodiment, the volume reducing device A A volume reducing means 1 for taking in the foamed resin and reducing the volume; and a foamed resin which is connected to the upper part of the volume reducing means 1 and which is fragmented to be introduced into the volume reducing means 1. And a hopper 2.
The hopper 2 is mounted on a leg frame 3.

The volume reducing means 1 is for reducing the volume by taking in the flaked foamed resin, heating and melting and degassing the foamed resin. Inlet 101 into which foamed resin is injected from 2
A screw 150 is rotatably inserted into a cylindrical cylinder 100 having a nozzle portion 102 for discharging the reduced volume of resin at the tip, and the nozzle portion 102 is exposed to the outside. Stored in the box.

The intake 101 and the lower part of the hopper 2
The foamed resin in the hopper 2 communicates with each other so as to be quickly introduced into the intake 101.

As shown in FIG. 2, the inside of the cylinder 100 is formed to have a different diameter.
The inside of the intake 101
A pressure section 104 provided on the secondary side (right side in the figure) of the capture section 103 and having an inner diameter smaller than that of the capture section 103;
4 and a compression section 105 whose inner diameter gradually decreases as it goes from the intake section 103 to the pressurizing section 104, and is connected to the secondary side of the pressurizing section 104 so that the inner diameter is smaller than that of the pressurizing section 104. A decompression unit 106 which is enlarged, and the decompression unit 106 and the nozzle unit
An extruded portion 107 having an inner diameter smaller than that of the depressurized portion 106 is formed between the extruded portion 107 and the depressurized portion 106.

In the screw 150, the tip of the rotating shaft 151 is rotatably supported on the tip wall of the cylinder 100 via a bearing 108, and the rear end of the screw 150 passes through the rear end wall of the cylinder 100 to form the bearing 109. It is rotatably supported through. A sprocket (not shown) is fixed to the rear end of the shaft, and a chain (not shown) is stretched between the sprocket and a sprocket (not shown) fixed to a drive shaft of the motor 4 described later. The driving force is transmitted, and the motor is rotated at a predetermined rotation speed.

The nozzle portion 102 has an opening 102a through which a resin is discharged around a bearing 108 which supports the tip of a rotary shaft 151 of the screw 150.

On the outer periphery of the rotary shaft 151 of the screw 150, a screw blade 152 having a diameter substantially corresponding to the inner diameter of the cylinder 100 having the different diameter is formed. The taken-in foam resin is extruded and conveyed toward the nozzle section 102.
The screw blade 152 is formed so as to be in sliding contact with the inner surface of the cylinder 100 at least at portions corresponding to the intake portion 103, the pressurizing portion 104, and the pushing portion 107.

The pitch of the screw blade 152 is set between the take-in portion 103 and the portion corresponding to the pressurizing portion 104 and the pushing portion 10.
7 is formed at the same pitch in the portion corresponding to the pressure reducing portion 106, but in the portion corresponding to the pressure reducing portion 106, the pitch is formed larger than the others, and the space sandwiched by the screw blade 152 corresponds to the portion corresponding to the pressure reducing portion 106. It is formed to be larger only.

The rotation shaft 151 of the screw 150 is
It is formed to have the same diameter from the portion corresponding to 103 to the extrusion portion 107.Therefore, as shown in the drawing, the gap between the inner surface of the cylinder 100 and the rotating shaft 151 of the screw 150 is formed at the intake portion 103. It is the largest, and gradually decreases from the compression section 105 to the pressure section 104.
Then, it is configured such that it becomes the smallest in the pressurizing section 104, becomes slightly larger in the pressure reducing section 106 following the pressurizing section 104, and becomes smaller again in the pushing section 107.

Thus, the intake section 10 of the cylinder 100
The foamed resin taken in from step 3 is sequentially extruded and conveyed by the rotation of the screw 150, and is compressed in the compression section 105 as the gap between the inner surface of the cylinder 100 and the rotating shaft 151 is gradually reduced. It generates heat and is heated.

A plurality of ribs 110 project from the inner surface of the cylinder 100 in the compression section 105 along the axial direction of the cylinder 100. When the foamed resin is compressed in the compression section 105, the foamed resin is filled with the ribs 110. It is guided to 110 and extruded and conveyed to the pressurizing section 104, so that the screw 150
To prevent the foamed resin from rotating together with the rotation of. As a result, the foamed resin is effectively compressed in the compression section 105, and frictional heat due to the compression is efficiently generated.

The cylinder in the compression section 105
The distance L in the axial direction of the cylinder 100 is preferably formed so as to satisfy the relationship of L ≧ R with the inner diameter R of the cylinder 100 in the intake section 103.

The compression section 105 narrows down the foamed resin to about 1/3 to 1/5 in order to generate frictional heat in the foamed resin taken in the take-up section 103 and to degas air in the resin. However, if the axial distance L of the cylinder 100 is smaller than the inner diameter R of the cylinder 100 in the intake section 103, the compression section 105 that connects the intake section 103 and the pressurizing section 104 will rapidly Since the gap between the inner surface of the screw 150 and the rotating shaft 151 of the screw 150 is reduced, a load is applied to the motor 4 for rotating the screw 150, which is not preferable. If the axial distance L of the cylinder 100 in the compression section 105 and the inner diameter R of the cylinder 100 in the intake section 103 are formed so as to satisfy L ≧ R, the inner surface of the cylinder 100 and the screw 150 The rate of decrease of the gap with the rotating shaft 151 of the
It is possible to compress the foamed resin without applying a load on the motor 4 for rotating the screw 150, generate frictional heat, and extrude and transport the foamed resin to the pressurizing section 104 while degassing.

The compressed foamed resin is extruded and conveyed with the rotation of the screw 150 while being pressurized in the pressurizing section 104 subsequent to the compressing section 105, and is further melted and degassed by the friction caused by the pressurization. Sent to

In the pressure reducing section 106, the gap between the inner surface of the cylinder 100 and the rotating shaft 151 of the screw 150 increases, and the molten foamed resin that has been in a pressurized state via the compression section 105 and the pressure section 104 is removed. The pressure is reduced. At this time, a negative pressure due to the reduced pressure acts on the molten foamed resin, and the vapor (water and gas) remaining in the resin is effectively removed.

On the wall surface of the cylinder 100 corresponding to the pressure reducing section 106, a vent port 111 (discharge port) for discharging the vapor in the pressure reducing section 106 to the outside is provided. The steam desorbed from the tank is discharged to the outside of the volume reducing means 1 through the vent port 111.

Therefore, the foamed resin compressed and heated and melted through the compressing section 105 and the pressurizing section 104 is degassed in the depressurizing section 106 to be effectively degassed in the section. The amount of residual steam in the resin is reduced as compared with the extruded product, and a high-quality reprocessed product having a large true specific gravity can be obtained.

Further, the pitch of the screw blade 152 of the screw 150 corresponding to the pressure reducing portion 106 is formed larger than other portions, and the space sandwiched between the screw blades 152 becomes larger only at the portion corresponding to the pressure reducing portion 106. With this configuration, the molten foamed resin extruded and conveyed to the decompression unit 106 is supplied to the vent port 11 by a negative pressure.
I try to prevent them from being sucked into one.

The foamed resin melted by removing the vapor remaining in the resin in the pressure reducing section 106 is supplied to the extruding section 107 by the inner surface of the cylinder 100 and the rotating shaft 15 of the screw 150.
The pressure is increased by reducing the gap between the two again. Here, the molten foamed resin extruded and conveyed from the decompression section 106 to the extrusion section 107 is further degassed by being pressurized. The vapor desorbed here is pushed backward, and is discharged from the vent port 111 to the outside of the apparatus in the decompression section 106.

Reference numerals 112 and 113 denote preheating heaters provided on the outer periphery of the cylinder 100 corresponding to the pressurizing section 104 and the extruding section 107, respectively.

In the present invention, the foamed resin taken in from the inlet 101 of the cylinder 100 is compressed in the compression section 105 with the rotation of the screw 150, heated by frictional heat, and further heated in the pressure section 104. Since the foamed resin is melted by being pressed, it is hardly necessary to actively heat the foamed resin from the outside. For this reason, the residual heat heaters 112 and 113 only need to generate enough heat to keep the inside of the cylinder 100 at a constant temperature.
The heating temperature is kept low so that the temperature of the molten resin in the cylinder 100 does not exceed about 180 ° C. Therefore, the volume can be reduced without causing scorching of the resin surface or deteriorating the resin.

The motor 4 for rotating the screw 150 is disposed below the volume reduction device 1 by utilizing a space surrounded by the leg frame 3. Similarly, a control board 5 and the like are arranged below the volume reducing device 1.

FIG. 4 shows another embodiment of the volume reducing means. 2 are given the same reference numerals.

In this volume reducing means 1 ', the cylinder 100'
The inner diameter is formed to be the same from the intake portion 103 to the nozzle portion 102, and the outer diameter of the rotating shaft 151 'of the screw 150' inserted into the cylinder 100 'is formed to have a different diameter.
That is, at a portion corresponding to the compression portion 105, the outer diameter of the rotation shaft 151 'is gradually increased toward the pressing portion 104, so that the gap between the inner surface of the cylinder 100' and the rotation shaft 151 'is increased. Is gradually reduced from the intake section 103 to the pressurizing section 104, and at a portion corresponding to the pressurizing section 104, the outer diameter of the rotating shaft 151 ′ is maintained,
06, the outer diameter of the rotary shaft 151 'is reduced so that the gap between the inner surface of the cylinder 100' and the rotary shaft 151 'is increased. In the same manner as the pressurizing section 104,
The outer diameter of 151 ′ is increased so that the gap between the inner surface of cylinder 100 ′ and rotating shaft 151 ′ is reduced again. With such a configuration, the same function as the volume reducing unit 1 shown in FIG. 2 can be achieved.

In the present invention, the inner surfaces of the cylinders 100 and 100 'in the compression section 105 and the screw 150
, 150 ′ means that the gap between the rotating shafts 151, 151 ′ becomes gradually smaller because the foamed resin taken in the take-in section 103 is extruded and conveyed and is compressed before being introduced into the pressurizing section 104. Means that the cylinders 100, 10
The inner surface of 0 'or the outer surface of the rotating shafts 151, 151' does not necessarily have to change linearly from the intake unit 103 to the pressing unit 104.

It is optional to add a molding means for molding the discharged resin into a predetermined shape to the nozzle portion 102 of the volume reducing means 1, 1 'in the present invention.

The hopper 2 is formed in a box shape for accommodating the fragmented foamed resin.
The foamed resin contained therein can be introduced into the intake port 101 by communicating with the intake port 101.

In FIG. 1, reference numeral 300 denotes a cooling means, and the high-temperature (about 180 ° C.) steam discharged from the vent port 111 is introduced into the hopper 2 through the cooling means 300 so as to be introduced. And the inside of the hopper 2. FIG. 5 is a sectional view showing the structure of the cooling means 300.

The cooling means 300 is for cooling the high-temperature steam discharged from the vent port 111. A copper tube 302 is spirally wound and accommodated in a box 301 in which cooling water is stored. ing. One end of the copper tube 302 penetrates from the side of the box 301 to the outside above the box 301 and communicates with the vent port 111, and the steam discharged from the vent port 111 enters the box 301. It can be introduced. The other end of the copper tube 302 penetrates from the side of the box 301 to the outside below the box 301, and communicates with a waste liquid storage unit 303 provided below the box 301.

The copper tube 302 housed in the box 301 is
Bifurcated inside 301, two spiral parts 302a, 3
After constructing 02b, it is unified again at the other end of the copper tube 302. Thus, the two spiral portions 302 are formed by the copper tube 302.
By configuring a and 302b, the high-temperature steam discharged from the vent port 111 can be efficiently cooled by the cooling water.

The waste liquid storage 303 stores the waste liquid condensed and liquefied by cooling the high-temperature steam flowing through the copper tube 302 with the cooling water at the bottom, and stores only gas components in the waste liquid storage 303. Gas vent 3 provided at the top of the side of
It has a condensation separation function to discharge from 04. The gas vent port 304 communicates with the inside of the hopper 2 and the vent port 111
Only the gas components of the high-temperature steam discharged from the hopper 2 are returned to the inside of the hopper 2.

In the figure, reference numeral 305 denotes a drain port provided in the waste liquid storage section 303, and the waste liquid stored in the waste liquid storage section 303 can be discharged from the drain port 303 to the outside.

FIG. 6 is a sectional view showing details of the structure near the vent port 111. In FIG. 6A, reference numeral 401 denotes a cylindrical wall portion which stands upright from a box housing the cylinder 100. The opening formed by the cylindrical wall portion 401 communicates with the vent port 111 of the cylinder 100. The cylindrical wall 40
A cylindrical nipple 402 is screwed into the inner surface of 1 to form a cylindrical wall.
A cylindrical portion further extends above 401. Nipple 402
A small-diameter portion 402b is integrally formed above the outer peripheral surface of the upper end portion of the T-tube with a step portion 402a interposed therebetween.
The cylindrical portion 403a of the 403 is externally fitted.

The cylindrical wall 401, the nipple 402 and the T-tube
An inner tube 404 is inserted inside a cylindrical portion formed by the tube portion 403a of the 403. The inner cylinder 404 is formed in a cylindrical shape having a length from the base end of the cylindrical wall portion 401 to a substantially upper end portion of the cylindrical portion 403a of the T-shaped tube 403, and the outer peripheral surface thereof has the cylindrical wall portion. The position corresponding to the vicinity of the base end of 401 and the T-shaped tube 403
A plurality of openings 404a and 404b are respectively formed at positions corresponding to the horizontal port 403b.

A baffle plate 405 is provided at an end of the inner cylinder 404 facing the vent port 111 so as to close the end opening. The baffle plate 405 is made of the foamed resin whose volume has been reduced by the volume reducing means 1,
It has the function of preventing intrusion into 04 and leakage to the outside. As shown in FIG. 6B, a large number of baffles 405 are provided to prevent leakage of the foamed resin from the volume reducing means 1 and to discharge only the steam inside the volume reducing means 1 to the outside. Are formed of perforated punched metal. The diameter of the small holes h is preferably 1 mm or less from the viewpoint of preventing leakage of the foamed resin from the volume reducing means 1 and discharging only air.

A bushing 406 is fitted to the upper end of the inner cylinder 404. The inner cylinder 404 is formed of a cylindrical portion formed by a cylindrical wall 401, a nipple 402, and a cylindrical portion 403a of a T-shaped tube 403. With the bushing 406 inserted inside, the T-tube 4
03 is supported by being fitted inside the upper end of the cylindrical portion 403a.

As described above, the inner cylinder 404 is formed by the nipple 402 and the T
When inserted and supported in the tubular portion formed by the tubular portion 403a of the character tube 403, between the outer surface of the lower end portion of the inner tube 404 and the inner surface of the tubular wall portion 401 are shown in the drawing. A slight gap s is formed as described above, and the steam discharged from the vent port 111 is configured to be able to flow into the inner cylinder 404 from the gap s through the lower opening 404a of the inner cylinder 404. ing.

In the figure, reference numeral 407 denotes a plug fitted to the other end of the bushing 406.
The upper part of 04 is closed.

The T-shaped tube 403 has a horizontal opening 403b.
Communicates with one end side of the copper tube 302 in the cooling means 300, whereby steam discharged from the vent port 111 passes through the upper opening 404b of the inner cylinder 404 from the inside of the inner cylinder 404, and the T The cooling pipe 300 is introduced into the cooling means 300 through a horizontal pipe port 403b of the character pipe 403.

However, the flow of steam from the vent port 111 to the inside of the hopper 2 will be described. The high-temperature steam discharged from the vent port 111 passes through the outer surface of the lower end of the inner cylinder 404 and the inner surface of the cylindrical wall 401. Flows through the lower opening 404a into the inner cylinder 404 through the lower opening 404a, passes through the upper opening 404b of the inner cylinder 404, and is discharged from the horizontal opening 403b of the T-shaped tube 403.
It is introduced into the cooling means 300 which communicates with the horizontal port 403b of the character pipe 403.

The high-temperature steam introduced into the cooling means 300 is
In the process of flowing through the copper tube 302 (spiral portions 302a and 302b), it is cooled by cooling water. Styrene monomer, which is a malodorous component contained in the high-temperature steam discharged from the vent port 111, is liquefied by being cooled by cooling water. The liquefied styrene monomer flows into the waste liquid storage section 303 from the other end of the copper tube 302, and is stored at the bottom of the waste liquid storage section 303. On the other hand, the remaining gas components
It is returned from 304 to the inside of the hopper 2.

Therefore, in the circulation system formed between the volume reducing means 1 and the hopper 2, the cooling means 300 separates the styrene monomer which is a malodorous component from the high-temperature steam discharged from the vent port 111, Since only the gas component containing almost no styrene monomer is returned to the inside of the hopper 2, the emission of offensive odor to the outside of the apparatus can be further reduced, and water droplets adhere to the foamed resin molded product W1. Can be processed without any problem,
There is an effect that the foamed resin molded article can be treated irrespective of adhesion of water droplets and without worrying about emission of bad smell.

In the air circulation system provided between the volume reducing means 1 and the hopper 2 as described above, the hopper 2 is substantially used from the viewpoint of ensuring the emission of offensive odor to the outside of the apparatus. It is preferable to form a closed space.
Here, the fact that the hopper 2 is substantially closed means that the hopper 2 is closed.
The upper side and the side not communicating with the volume reducing means 1 are closed, and the interior of the hopper 2 is opened so as to directly communicate with the outside world except the volume reducing means 1 at least at the time of the volume reducing processing of the foamed resin. Not in a state. For example, hopper 2
The lid is opened and closed only when the foamed resin is supplied, and is closed during the volume reduction process, or a duct is connected to supply the foamed resin to the hopper 2. It is conceivable to form it so as to be closed.

Therefore, the foamed resin crushed by the crushing means provided in the crushing device provided separately from the volume reducing device A is conveyed into the hopper 2 by using a duct, so that the hopper 2 Is described below as a substantially closed space.

FIG. 7 shows a schematic configuration of a preferred embodiment of a foamed resin molded article regenerating apparatus provided with crushing means for supplying the fragmented foamed resin to the volume reducing means 1.

In the figure, B is a crushing device. The crushing device B is formed in a box shape by extending a side plate on a rectangular frame (not shown), and is provided at an upper portion inside the main body. An input section 6 into which the foamed resin molded product W1 is input,
It has a crushing means 7 for the foamed resin molded article W1 disposed below the charging section 6, and a storage section 8 provided below the crushing means 7 at the lowermost portion. Is configured as a separate device, and the foamed resin W2 fragmented by the crushing device B is supplied to the hopper 2 of the volume reduction device A by being conveyed.

The charging section 6 has a charging port (not shown) for charging a used foamed resin molded article W1 at an upper portion or a side portion, and is used to be sequentially crushed and fragmented by crushing means 7 described later. A hopper structure for accommodating the completed foamed resin molded product W1 is provided. Although not shown, the inlet is provided with a lid for preventing contamination of foreign substances and emission of odor during operation of the apparatus and for safety, and is provided after the used foamed resin molded article W1 is inserted. Is preferably covered with a lid.

The crushing means 7 is provided below the charging section 6 and crushes the foamed resin molded article W1 charged in the charging section 6 sequentially from the lower side thereof into small pieces. As long as the foamed resin molded product W1 has a structure that can be crushed and fragmented, any application can be applied. In the present embodiment,
This shows a structure in which the foamed resin molded product W1 can be further finely grained than crushed into pieces.

The crushing means 7 has one end side of a plurality of plate members 72 fixed to a rotating shaft 71 which is rotatably mounted horizontally by rotatably supporting both ends below the charging section 6. Rotating plate 70, and a perforated plate 73 stretched with a predetermined gap between the tip of the plate member 72 below the rotating plate 70,
It has a motor 74 as a drive source for driving the rotary plate 70 to rotate.

This crushing means 7 is different from the conventional means for cutting and crushing a foamed resin molded product by sliding contact between the blade portion of the rotary blade and the fixed blade, and has no fixed blade. Unlike mere crushing, by crushing and rubbing the foamed resin molded product W1 between the rotary plate 70 and the perforated plate 73, the crushed particles are made into finer particles than the crushed flakes. Device.

As described above, when the foamed resin molded product W1 is finely divided into finer particles than the flakes by crushing, the foamed resin W
2, the packing density can be increased, and the volume reduction processing amount can be increased accordingly.

A sprocket 71a is fixed to one shaft end of the rotary shaft 71, and a chain 74b is stretched between the sprocket 71a and the sprocket 74a fixed to the drive shaft of the motor 74 so that the motor 74
The driving force of 74 is transmitted, and the rotation is performed at a predetermined rotation speed.

The plate member 72 is formed in a substantially rectangular shape by a flat plate, and a plurality of the plate members 72 are arranged side by side at predetermined intervals in the axial direction of the rotary shaft 71. One end is fixed at a predetermined angle in the radial direction, and the other end (the end opposite to the rotating shaft 71) has a length that reaches the surface of the porous plate 73.

As shown in FIGS. 9 and 10, a pressing plate 72a for pressing the foamed resin molded product W1 against the surface of the perforated plate 73 is provided at the tip end of each of the plate members 72. The pressing plate 72a presses the foamed resin molded product W1 put into the input section 6 against the surface of the porous plate 73, and presses the pressed foamed resin molded product W1 with the rotation of the rotary plate 70. The surface of 73 is rubbed.

The pressing plate 72a is composed of small pieces formed in a substantially rectangular shape by a flat plate, and is provided at the tip end side of each plate member 72 so as to protrude laterally from both side surfaces thereof. Also, this pressing plate 72a is
b faces the perforated plate 73 and the surface 72b is inclined at a predetermined angle toward the rotation direction of the plate member 72. When formed in this manner, the pressing plate 72a is made of a foamed resin molded product W
1 can be guided in the direction of rotation of the rotating plate 70 on the side 72b facing the perforated plate 73, and at the same time can be naturally guided toward the surface of the perforated plate 73. The effect of pressing and crushing and rubbing is enhanced.

The pressing plate 72a is not limited to the illustrated example in which the pressing members 72a protrude from both side surfaces on the distal end side of the respective plate members 72, but may protrude from only one side surface on the distal end side of the respective plate members 72. Alternatively, the plate member 72 protruding from both side surfaces and the plate member 72 protruding only from one side surface may be mixed in the rotating plate 70.

The plate member 72 has a saw blade portion 72c on the rotation direction side thereof for piercing and breaking the foamed resin molded product W2. As a result, the foamed resin molded product W1 is
The blade 72 is pierced by the saw blade portion 72c and broken into small blocks by the rotation of the plate member 72. The pressing plate 72a of the plate member 72 reliably presses the surface of the perforated plate 73 to crush and rub.

The perforated plate 73 is stretched at a predetermined interval from the tip of the plate member 72, and is pressed against the surface with the rotation of the rotary plate 70 and rubs while being foamed.
Is made into fine particles by grinding through a hole edge 73b of a through hole 73a formed in the perforated plate 73, and is stretched so as to surround the lower side of the rotating plate 70.

The perforated plate 73 is made of a metal material and has a diameter of 30 mm.
It is formed in a plate-like or net-like shape with a large number of through holes 73a of about 100 mm open.Specifically, a punching metal in which a large number of through holes are formed in a metal plate or a metal material with a large number of cuts is stretched. An expanded metal or the like in which a through-hole is formed by forming a through hole in a mesh shape can be used. In particular, the expanded metal has a portion in which the edge of the through hole projects at an acute angle toward the surface side, and the acute angled projecting portion is pressed against the surface by the pressing plate 72a of the rotating plate member 72. There is an advantage that the obtained foamed resin molded product W1 can be effectively ground and refined, and furthermore, since the expanded metal can be a commercially available product, there is also an advantage that the production cost can be reduced. preferable.

The accommodating portion 8 is provided below the perforated plate 73 in the crushing means 7, and is finely granulated by the crushing means 7 and discharged from the through-hole 73 a of the perforated plate 73.
2 is provided. Two openings 81 and 82 are formed in the side surface of the housing portion 8, and one opening 81 is connected to the hopper 2 of the volume reduction device A through the blowing means 9.
And the other opening 82 is connected to the hopper 2 of the volume reduction device A by the circulation duct 11. Therefore, the hopper 2 of the volume reduction device A has openings 21 connected to the transfer duct 10 and the circulation duct 11, respectively.
And 22 are formed.

In the present embodiment, the hopper 2 of the volume reduction device A is formed in a box whose upper and side sides are closed, and has a conveying duct 10, a circulation duct 11, and the volume reducing means 1. He is isolated from the outside world except that he is in contact. Thereby, the malodorous component generated when the foamed resin W2 is heated and melted by the volume reducing means 1 is prevented from being diffused from the hopper 2 to the outside as much as possible.

The blowing means 9 is accommodated in a space 83 formed between the side of the accommodating portion 8 and the inside of the crushing device B main body, and is finely granulated accommodated in the accommodating portion 8. This is for sucking the foamed resin W2 and transporting the foamed resin W2 to the hopper 2 of the volume reduction device A by the transport duct 10, and is constituted by a blower motor or the like. Since the finely-granulated foamed resin W2 has a small specific gravity and is extremely light, the suction force of the blowing means 9 only needs to have a suction force enough to suck the finely-granulated foamed resin W2 and transport it to the hopper 2. .

In this space 83, a motor 75 for rotating and driving the rotary plate 70 is also housed. Further, the blowing means 9 is not limited to the one stored in the space 83,
Although it may be installed outside the crushing device B main body, this space 83
It is preferable that the noise generated by the blowing means 9 can be prevented from leaking outside and space can be saved.

Reference numeral 84 denotes a magnet provided at the bottom of the housing portion 8. When the magnet is provided at the bottom of the housing portion 8 as described above, the magnets 84 are contained in the foamed resin W 2 finely granulated by the crushing means 7. Metallic foreign matters such as mixed metal pieces can be sucked and held at the bottom of the housing portion 8. Thereby, the hopper 2 of the volume reducing device A is
It is possible to prevent a situation in which a metal foreign matter such as a relatively light metal piece is erroneously conveyed, and it is possible to reliably prevent the metal foreign matter from entering the volume reduction unit 1.

The transfer duct 10 is for transferring the foamed resin W2 in the storage section 8 to the hopper 2 of the volume reducing device A by the blowing means 9, while the circulation duct 11
Is for recirculating the air in the hopper 2 of the volume reduction device A to the storage section 8 using the wind power used for transporting the foamed resin W2. Any of these may be of any material and shape as long as they have a finely-granulated foamed resin W2 or a duct structure through which air can flow, but as shown in this embodiment, the volume reducing device A When the crushing device B and the crushing device B are separately formed, it is particularly preferable that the crushing device B is formed by a flexible tube.

Further, at least the transfer duct 10 is formed of a transparent or translucent material so that the transfer state of the foamed resin W2 transferred from the storage section 8 can be visually checked, so that the inside is directly visible. Preferably it is possible. In this case, the entirety of the transfer duct 10 may be formed of a transparent or translucent material, or the transfer duct 10
Alternatively, a small window for visual recognition may be partially formed, and only the small window may be formed of a transparent or translucent material.

As described above, since the hopper 2 of the volume reduction device A and the storage section 8 are connected to each other by the transfer duct 10 and the circulation duct 11, respectively, the transfer duct 10 is separated from the storage section 8. A circulation path including a path through the hopper 2 through the hopper 2 and a path from the hopper 2 through the circulation duct 11 to the storage unit 8 is formed. The side and upper sides of the hopper 2 are closed and isolated from the outside. As a result, the gas containing the bad odor generated when the foamed resin W2 is heated and melted in the volume reducing means 1 is not circulated to the outside of the apparatus, but is circulated and circulated between the hopper 2 and the storage section 8. In addition, the working environment is prevented from being significantly deteriorated due to the emission of offensive odor.

In this embodiment, the volume reducing device A and the crushing device B, which are separately formed, are connected to the transfer duct 10 respectively.
However, the hopper 2 of the volume reduction device A is isolated from the outside world, and the transfer duct 10 is provided between the hopper 2 and the accommodating portion 8 of the crushing device B as described above. As long as the circulation path is formed by the circulation duct 11 and the circulation duct 11, both may be assembled to form an integrated device.

In FIG. 7, reference numeral 23 denotes a circulation duct 1.
1 is a mesh filter that closes the front side of the opening 22 to which the opening 1 is connected. When the air in the hopper 2 returns to the storage section 8 through the circulation duct 11, the foamed resin W2 in the hopper 2 returns together. I try not to. This mesh filter
The opening 23 is preferably about 1 to 3 mm so that the finely-granulated foamed resin W2 does not pass through.

Reference numeral 24 denotes a level sensor comprising a photoelectric sensor or the like provided on the side surface of the hopper 2, and a light emitting portion (not shown) of the level sensor 24 faces the inner surface of the side surface of the hopper 2.
Also in the hopper 2 of the foamed resin W2 conveyed from the accommodating section 8 through the conveying duct 10 to the light receiving section (not shown) of the level sensor 24 facing the inner surface of the side surface similarly. It detects the level of the capacity.
When the amount stored in the hopper 2 exceeds a certain amount, the level sensor 24 detects the amount and notifies the worker by a not-shown notifying means, and simultaneously stops the transfer of the foamed resin W2 to the hopper 2.

Since the finely-granulated foamed resin W2 is charged, the level sensor 24 facing the inner surface of the hopper 2 is charged.
Of the level sensor 24
May malfunction. For this reason, the opening 21 communicating with the transfer duct 10 is directed toward the surface of the detection unit of the level sensor 24, and air is blown from the opening 21 of the hopper 2 together with the foamed resin W2 transferred from the transfer duct 10. It is preferable that the foamed resin W2 attached to the detection unit of the level sensor 24 be blown off and removed by contacting each detection unit of the sensor 24.

A stirrer 200 is installed inside the hopper 2 above the intake 101 of the volume reducing means 1 so as to extend along the length of the intake 101 (the axial direction of the cylinder 100). .

The stirrer 200 is connected to the inlet 1 of the volume reducing means 1.
A plurality of stirring rods 202 are protruded from the outer peripheral surface of a rotating shaft 201 laid across the length of 01, and are driven by a motor 4 that rotationally drives a screw 150 of the volume reducing means 1. By rotating by the force, the foamed resin W2 collected near the bottom inside the hopper 2 (near the intake 101 of the volume reducing means 1) is stirred. Since the fragmented foamed resin W2 is extremely light, when it is dropped into the intake 101 of the volume reduction means 1 from the inside of the hopper 2, they strike each other to cause a so-called bridge, and the intake 10
In some cases, a phenomenon may occur in which the agitator 200 is rotated near the bottom inside the hopper 2 so that the foamed resins W2 abut each other, as shown in this embodiment. The formation of a bridge state is prevented, and the foamed resin W2 that has been fragmented is
There is an advantage that it can be smoothly dropped into the intake 101 of the volume reducing means 1.

However, according to the apparatus for regenerating a foamed resin molded product, the foamed resin molded product W1 in the charging section 6 is separated by the respective plate members 72 and the pressing plates 72a provided on the rotary plate 70 of the crushing means 7. Pressed against the surface of perforated plate 73, rotating plate 70
Are crushed and rubbed together with the rotation of the roller, and are finely ground by the hole edge 73b of the through hole 73a of the perforated plate 73.

The finely-granulated foamed resin W2 falls downward from the through hole 73a of the perforated plate 73 and is stored in the storage section 8.
At this stage, relatively large foreign matter such as a string mixed in the foamed resin molded product W1 is separated by the perforated plate 73. Also,
When there is a metal foreign matter such as a metal piece in the finely-granulated foamed resin W2, the foreign matter is attracted and held by the magnet 84 provided at the bottom of the housing portion 8 and separated from the foamed resin W2.

The foamed resin W2 housed in the housing portion 8 has a small specific gravity and is very light because it is finely divided. Therefore, the foamed resin W2 is easily sucked by the suction force of the blowing means 9 and reduced through the conveying duct 10. The container A is transported to the hopper 2. Since the suction force of the blowing means 9 is a suction force enough to suck the finely-granulated foamed resin W2 having a small specific gravity, foreign matters having a relatively large specific gravity, such as pebbles and metal pieces, are contained in the housing portion 8. Even if there is, the foamed resin W2 and the foreign matter are completely separated by utilizing the difference in specific gravity, and foreign matter such as pebbles and metal pieces having a relatively large specific gravity is prevented from being conveyed to the hopper 2. .

The foamed resin W2 conveyed to the hopper 2 is taken into the volume reducing means 1 connected below the hopper 2, and is heated and melted by the volume reducing means 1 to be subjected to volume reduction processing. In this volume reduction step, steam containing a malodorous component is generated from the foamed resin W2, and a part of the vapor flows out of the intake 101 into the hopper 2 and further from the interior of the volume reduction means 1 through the vent port 111 and the cooling means 300. According to the present embodiment, the hopper 2 has openings whose side and upper sides are respectively connected to the transfer duct 10 and the circulation duct 11.
Portions other than 21 and 22 are isolated from the outside world and are substantially closed. Moreover, the foamed resin W2 in the storage section 8 is transported into the hopper 2 through the transport duct 10 by the blowing of the blowing means 9. At the same time, the air in the hopper 2 is returned through the mesh filter 23 from the opening 22 to the storage section 8 through the circulation duct 11, and further circulates between the storage section 8 and the hopper 2. Vent in the storage means 1
Combined with the configuration in which the heat is returned from the 111 to the inside of the hopper 2 via the cooling means 200, the emission of offensive odor to the outside of the apparatus can be more effectively prevented.

[0100]

According to the present invention, a hopper for accommodating fragmented foamed resin is continuously provided at the intake of the volume reducing means, and the hopper is detached from the volume reducing means at the time of foaming resin volume reduction processing. By opening a discharge port for discharging the collected high-temperature steam and communicating the discharge port with the inside of the hopper through a cooling means, it is possible to further reduce the odor emitted from the reprocessing apparatus. In addition, there is a remarkable effect that the treatment can be performed regardless of whether or not water droplets adhere to the foamed resin molded product.

Further, a foaming resin in the storage section of the crushing device is transported into the hopper of the container reducing device by a transport duct, and a circulation path for returning the air in the hopper to the storage section by the circulation duct is provided. Because the air in the hopper circulates between the storage section and the hopper,
In addition to the above effects, the emission of offensive odor to the outside of the apparatus is more effectively prevented.

[Brief description of the drawings]

FIG. 1 is a side cross-sectional view showing a schematic configuration of a volume reduction device provided with a volume reduction means in a foamed resin molded product regeneration processing device according to the present invention.

FIG. 2 is a partially cutaway side sectional view showing a volume reducing means.

FIG. 3 is a longitudinal sectional view taken along the line III-III of FIG. 2;

FIG. 4 is a partially cutaway side sectional view showing another example of the volume reducing means.

FIG. 5 is a sectional view showing the structure of the cooling means.

FIG. 6 is a longitudinal sectional view showing a structure near a vent opening.

FIG. 7 is an explanatory view showing a schematic configuration of a preferred embodiment of a foaming resin molded article reprocessing apparatus according to the present invention.

FIG. 8 is a sectional front view showing a schematic configuration of a crushing apparatus.

FIG. 9 is a partially cutaway perspective view showing a main part of the crushing means.

FIG. 10 is an explanatory diagram showing an operation state of a rotating plate in the crushing means.

[Explanation of Signs] A Volume reducing device B Crushing device W1 Foamed resin molded product W2 Foamed resin 1, 1 'Volume reducing means 100, 100' Cylinder 101 Intake port 102 Nozzle section 102a Opening 103 Capture section 104 Pressing section 105 Compression section 106 Decompression section 107 Extrusion section 108, 109 Bearing 110 Rib 111 Vent port (discharge port) 112, 113 Heater for residual heat 150, 150 'Screw 151, 151' Rotating shaft 152 Screw blade 2 Hopper 21, 22 Opening 23 Mesh filter 24 Level Sensor 3 Leg frame 4 Motor 5 Control board 6 Input section 7 Crushing means 70 Rotating plate 71 Rotating shaft 71a Sprocket 72 Plate member 72a Pressing plate 72b One surface 72c Saw blade 73 Perforated plate 73a Through hole 73b Hole edge 74 Motor 74a Sprocket 74b Chain 8 Housing 81, 82 Opening 83 Space 84 Magnet 9 Ventilation means 10 Transport duct 11 Circulation duct 200 Stirrer 300 Cooling means

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) // B29K 105: 04 105: 26 F term (reference) 4D004 AA09 AC05 BA07 CA03 CA04 CA22 CB13 CB31 CC20 4D065 CA06 DD11 DD26 EB14 ED13 ED20 ED32 ED46 4F201 AA13 AA50 AG20 BA04 BC02 BC12 BC17 BC25 BN08 BN25 BN29 BP17 BP31 BP40 BQ02 4F301 AA15 AC12 BA12 BA21 BE01 BE05 BF17 BF32

Claims (4)

[Claims] 1. An apparatus for regenerating a molded foamed resin product having volume reducing means for taking in a fragmented foamed resin from an inlet and reducing the volume of the foamed resin. A hopper for accommodating the foamed resin is connected in series, and an outlet for discharging the high-temperature steam desorbed from the foamed resin at the time of volume reduction processing is opened in the volume reducing means. An apparatus for regenerating a foamed resin molded product, wherein the apparatus is in communication with the inside through a cooling means. 2. The cooling device according to claim 1, wherein the cooling means cools and condenses the high-temperature steam discharged from the discharge port by water cooling, and returns only a gas component of the high-temperature steam to the inside of the hopper. Regeneration processing equipment for foamed resin molded products. 3. A foaming resin molded article crushing means is provided below an input portion into which the foamed resin molded article is charged, and a housing section for accommodating the fragmented foamed resin is provided below the crushing means. A hopper for introducing the fragmented foamed resin from the storage section into the intake of the volume reducing means for taking in the foamed resin and reducing the volume while forming the crushing device and providing the same to the volume reducing means. The hopper is closed side and upper sides, and the inside of the storage section and the inside of the hopper are connected by a conveying duct via a blowing means, and the hopper is connected. A circulation duct connects the inside with the inside of the storage unit, and forms a circulation path for conveying the foamed resin in the storage unit into the hopper by the transfer duct and returning the air in the hopper to the storage unit by the circulation duct. In addition, the volume reducing means is provided with a volume reducing process. Opening the outlet for discharging the high-temperature steam desorbed from the foamed resin at the time of opening, and communicating the outlet with the inside of the hopper through a cooling means through a cooling means. apparatus. 4. The cooling means according to claim 3, wherein said cooling means cools and condenses the high-temperature steam discharged from the discharge port by water cooling, and returns only a gas component of the high-temperature steam to the inside of the hopper. Regeneration processing equipment for foamed resin molded products.