JPH10146829A - Method and device for recovering and granulating waste resin molded product and manufacture of hollow woody synthetic plate using recovered resin material as raw material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To separate and remove deposits on a waste resin molded product, recover the deposits as a resin material and regenerated recovered resin material as a hollow woody synthetic plate. SOLUTION: A waste resin molded product is crushed into a plurality of crushed pieces 101, and then the crushed pieces 101 are dried, and if necessary, the dried crushed pieces 101 are roughly crushed to form smaller pieces 102 to be treated, and the impact grinding force is applied to the above-referred crushed pieces 101 or the smaller crushed pieces 102 to be treated and also the centrifugal force is applied thereon to carry out the dry cleaning for reducing deposits 104. During the process, the crushed pieces 101 or the smaller crushed pieces 102 to be treated are granulated by the above-referred impact force, and a recovered resin material 103 formed of the resin material made from the deposits adhered to the waste resin molded product and granulated as a material ready for use is recovered. Also the recovered resin material 103 recovered by the above-referred method is gelatinized together with a cellulose crushed material such as wood meal and kneaded to manufacture woody synthetic powder, which is heated, kneaded and extruded by an extruder with a core and molded into a hollow woody synthetic plate having a hollow inside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for collecting and granulating waste resin molded articles, and a method for producing a hollow wood composite board using the recovered resin material as a raw material.

More specifically, the present invention is applied to plastic film waste used in agriculture and the like, for example, so-called institutional horticulture such as polyvinyl chloride, polyethylene, polyvinyl acetate, and polyolefin, a greenhouse in agriculture and other cultivation. A film or sheet made of a thermoplastic resin which is used as a cover for seeds and seedlings of agricultural products and forms a used film or sheet that has been used and discarded for other uses (in this specification, "waste" Agricultural film "), a method and an apparatus for recovering resin material materialized from the waste agricultural film, and the interior and exterior parts of automobiles and furniture using the resin material recovered from the waste agricultural film as a raw material The present invention relates to a method for producing a hollow wood composite board that can be used in building materials, building materials, and other various applications.

[0003]

2. Description of the Related Art Conventionally, a film of polyvinyl chloride (soft PVC), polyethylene or the like or polycarbonate (P) which forms a waste agricultural film which is a waste resin molded product of this kind is conventionally used.
Sheets made of resin such as C) may be removed from the frame due to aging due to use or storms, resulting in pesticides,
Debris such as mud, soil, sand, gravel, metal, agricultural products (leaves, stems, etc.), glass shards, garbage, etc. are attached and are sequentially replaced to lose transparency, and collected for these replacements or disposal. Abandoned agricultural films were washed with water, dried, finely pulverized, and formed by blow molding or the like as a substitute for wooden piles and reused.

[0004] However, when the surface deposits of the waste agricultural film are washed with water and regenerated, a large amount of water is required in this washing step, and a drying step after washing is essential. A large amount of equipment is required for the drying process,
There was a problem of wasting water and energy resources.

[0005] In particular, the waste agricultural film usually has pesticides attached thereto, but when the film or sheet is washed with water, it is used for the washing, and the washing water in which the pesticides are dissolved contaminates rivers and the like. Therefore, the wastewater cannot be drained without the purification treatment, and the equipment and operation cost for the purification treatment are expensive. Therefore, most of the waste agricultural films are discarded without being reused.

[0006] On the other hand, waste agricultural films that have been disposed of as described above have excellent water resistance, weather resistance, and are resistant to decay. On the other hand, when they are incinerated by an incinerator for disposal, It is well known that harmful gases and smoke are generated, which is not preferable in the social environment.

In addition, there is a disadvantage that the resin material melted during incineration may adhere to the inside of the furnace and damage the furnace itself. Therefore, even if a resin molded product is buried underground to avoid this disadvantage, it remains without decay for a long period of time, and is considered to be a cause of environmental destruction.

Further, with respect to this kind of resin materials, resources are also being depleted year by year, and it is necessary to reuse the used resin materials without discarding them from the viewpoint of environmental conservation and effective use of resources. Requested and recognized.

In view of the above points, the applicant of the present invention crushes a waste agricultural film into small pieces and then crushes it into finer pieces to form a plurality of pieces to be treated. By applying an impact grinding force to the treated small pieces, the adhered substances adhering to the surface of the treated small pieces are crushed and separated from the resin material, and a number of small holes having a diameter that allows only the separated adhered substances to pass through are formed. And apparatus for classifying the resin material and the deposits through a screen that has been separated, and for sizing the resin material separated and classified from the deposits to a desired particle size and recovering the recovered resin material as a raw material An application has already been filed (Japanese Patent Laid-Open No. 8-169015).
issue).

[0010]

[Problems to be solved by the invention]

[Problem] The invention of the above-mentioned Japanese Patent Application Laid-Open No. 8-169015 discloses a method for removing pesticides, mud, soil, sand, gravel, grass roots, metals, agricultural products (leaves, stems, etc.), glass fragments, garbage, etc. attached to waste agricultural films. The resin material can be recovered by removing adhering matter without performing washing such as washing with water, so that the washing water does not cause contamination of rivers and the like, and is also used to avoid contamination of rivers and the like. This is excellent in that it is not necessary to provide a purification facility or the like.

However, it is rare that the discarded and collected waste agricultural film is wound up in a tubular shape and stored, and is usually stored after being folded or rolled to an appropriate size. . In addition, large amounts of rainwater, dew, etc. may be left in the gaps between folded or rolled films because they are kept open in one corner of farmland until they are removed from the framework of the greenhouse and collected by a collection company. Of soil, sand, mud, etc. containing a large amount of water that has absorbed rainwater and dew, etc., and about 30 to 45% of the total weight of the waste agricultural film at the time of collection becomes water. ing. The water remaining in the gaps of the waste agricultural film flows out when the waste agricultural film is crushed or crushed into small pieces, and is removed to some extent. The treated pieces still have 14 to 15 wt% of moisture attached.

A pesticide, mud, soil, sand,
Deposits such as gravel, metal, agricultural products (leaves, stems, etc.), glass shards, and garbage will not be easily crushed by the application of impact attrition if large amounts of water remain attached, and will not be easily crushed. In some cases, it could not be separated from the surface, and even when separated, it adhered again to the small pieces to be treated, or these adhered substances were sometimes left as relatively large lumps without being crushed. .

[0013] In this case, the classification of the small pieces to be treated and the deposits separated from the small pieces to be treated is performed by passing through a screen provided with small holes through which only finely pulverized deposits can pass. It is carried out by collecting only the crushed deposits, but the deposits separated from the small pieces to be treated as lump as described above not only do not pass through the screen but also soil and sand containing a large amount of moisture. In addition, the lump of deposits such as mud is clogged in the eyes of the screen due to its viscosity, which may make it difficult to efficiently separate and classify the resin material and the deposits in a short time. In particular, if the deposits clogged on the screen dry due to frictional heat generated by the application of the grinding impact force, the deposits are fixed to the eyes of the screen, and the operation is stopped once to stop such clogging. It is necessary to clean the raised screen by cleaning or the like, which not only takes a long time, but also causes a reduction in efficiency due to interruption of the operation.

In the case of processing a large amount of waste agricultural film, the waste agricultural film crushed in the crushing step is completely crushed into small pieces due to spilling of a cutting blade, deviation of clearance, and the like. Difficult to do,
Some of them become strips in which small pieces are connected in a rosary, and other crushed pieces having a shape larger than a desired shape.

When the crushed pieces crushed in a band shape are to be processed, the processing in the next step takes a long time in proportion to the enlargement of the processing object, and the processing in the next step is performed in a short time. If it is to be performed, it is necessary to provide a step of cutting the crushed pieces of the waste agricultural film collected as a strip or the like more finely. On the other hand, it is not only troublesome to adjust and replace the cutting blade during the work, but also the replacement work involves stopping the apparatus, which causes a reduction in processing capacity.

The use of the recovered resin material recovered in this way has not been established. If there is a suitable use for the recovered resin material, the recovery of the waste resin molded product can be further improved.
Regeneration can be promoted.

[Object] Accordingly, the present invention has been developed to solve the above-mentioned problems, and a waste agricultural film crushed or, if necessary, crushed after the crushing is stirred by a dryer.・ By drying, the water content of the crushed pieces is reduced to 5
wt% or less, and agitation in the drying step partially removes gravel, glass shards, and other deposits, facilitating subsequent processing. In addition, the stirring in the drying step results in a beaded shape by the crushing. To provide a method and an apparatus for collecting and granulating a waste resin molded product that can crush crushed pieces crushed as a strip connected to a piece into small pieces and shorten the processing time in the next step. And

Another object of the present invention is to provide a method for producing a hollow wooden synthetic board which can be used for a wide variety of applications, using a resin material recovered by the above method and apparatus as a raw material. It is an object of the present invention to give a suitable use to the recovered resin material, to promote the recovery of the waste resin molded product, and the reuse thereof.

[0019]

[Means for Solving the Problems]

(Structure) In order to achieve the above object, in the method for collecting and granulating a waste resin molded product of the present invention, a method for separating adhered substances from the waste resin molded product and recovering the resin material,
The processing target is a waste agricultural film, a crushing step of crushing the waste agricultural film to form a plurality of crushed pieces 101, and reducing the water content to 5 wt% or less, preferably 3 wt% or less while stirring the crushed pieces 101. A drying step of drying, a dry cleaning step of applying an impact-milling force to the dried individual crushed pieces 101 to separate the resin material and the deposits, and a deposit 104 separated by the dry cleaning step. At least, and a sizing step of sizing the resin material from which the deposits 104 have been separated to form a recovered resin material 103 that has been made into a material.

In the above-described method, a crushing step of further crushing the crushed pieces 101 into a plurality of small pieces to be processed 102 may be provided before or after the drying step, if necessary.

In the drying step, the crushed pieces 101 or the small pieces 102 to be treated are stirred and dried to thereby form the crushed pieces 101.
Alternatively, the method may include a step of removing the attached matter 104 separated from the processing target piece 102.

The crushed pieces 101 in the drying step
Alternatively, the small piece 102 to be treated is heated by hot air at 70 to 80 ° C. at which the crushed piece 101 or the small piece 102 to be treated does not melt.

The waste resin molded product collection / granulation apparatus of the present invention is a device for separating adhering matter from the waste resin molded product and recovering the resin material. Crushing means 110 for crushing the waste agricultural film into a plurality of crushed pieces 101, a drying chamber 504 in which the crushed pieces 101 are charged, and a crushed piece 1 in the drying chamber 504.
Stirring means for stirring 01 (522, 524 and 526)
A drying means 500 provided with a heating means 506 for heating the inside of the drying chamber 504; and a fixed disk 131 having a central portion communicating with a supply inlet 132 of the crushed pieces 101 dried by the drying means 500. And a fixed-side polishing and sizing means in which each fixed pin 134 is sequentially implanted on a plurality of rotation trajectories, and a movable disk 141 which is rotatably provided facing the fixed disk 131, Each fixing pin 134
A movable-side polishing and sizing means in which movable pins 144 are sequentially implanted on a plurality of rotation trajectories different from those of the fixed pins 1;
34 and the outer periphery of the combination of each movable pin 144,
Classification means communicating with the discharge port 152 for discharging the separated deposits, and take-out means for taking out the collected resin material having a desired particle size or more into the take-out port, and
Dry cleaning, classification and sizing means 130 configured to separate and classify the resin material and the adhered substance 104 by the impact attrition force between the movable pin 34 and each of the movable pins 144, and to size the resin material. And characterized in that:

In the above apparatus, before and after the drying treatment by the drying means 500, the crushing means 11
The crushed pieces 101 crushed by the
02, a crushing means 120 for crushing may be provided.

Further, a screen 510 having a number of small holes, for example, 3.5 mm, which is large enough to allow the separated deposits 104 to pass through, is formed on the bottom surface of the drying chamber 504 of the drying means 500, for example. The screen 510 allows the crushed pieces 101 or the small pieces 10 to be treated to be stirred and dried.
Means for removing the attached matter 104 separated from the second member may also be configured.

The recovered resin material 103 recovered by the above-described method and apparatus can be formed into a hollow wooden synthetic board by the method of the present invention. With respect to 25 to 80 wt% of the material, 30 to 70 wt% of the cellulosic crushed product having an average particle size of 20 mesh or less and moisture content of 0.5 wt% or less, preferably 0.1 wt% less than,
Drying is performed by frictional heat generated by the rotation of the stirring impellers 85, 86, and 87. Then, the crushed cellulosic material is mixed with the recovered resin material at the weight ratio described above, and gel is generated by frictional heat generated by the rotation of the stirring impellers. Kneaded, and cooled and pulverized to a particle size of 10 mm or less, preferably 5 mm, more preferably 3 mm or less.
The woody synthetic powder sized to be equal to or less than mm is heated and kneaded, and the extruding die 10 is extruded with a screw 71 from an extrusion die 19.
Is discharged to the molding die 10 through the introduction portion 11 of the molding die 10 and protrudes in parallel with the extrusion direction from the guide portion provided in the introduction portion 11 of the molding die 10, and passes through the melting portion 21 a to at least the slow cooling portion 21 b of the molding chamber 22. The extruded dough 79 extruded through the core body 40 extending to a predetermined thickness and having a hollow portion, and extruded into the forming die 10.
9 is characterized by including a step of gradually cooling the extruded dough 79 in the slow cooling section 21b and applying a suppressing force against the extruded dough 79 to the extruded dough 79 to increase the density of the extruded dough 79.

[Operation] With the above configuration, the waste agricultural film is crushed into a plurality of crushed pieces 101 by the crushing means 110,
When the crushed pieces 101 are dried by the drying means 500, the crushed pieces 101 are dried to a moisture content of 5 wt% or less of the attached matter 104 containing water.

In the drying means 500, the crushed pieces 10
1 is stirred at the same time as drying, and crushed pieces 1
01 ′ is broken up into individual pieces, and the dried deposits are partially separated from the crushed pieces by the stirring. In addition,
The crushed pieces 101 dried by the drying means 500 are:
If necessary, before and after the drying step,
It is then crushed into smaller pieces 102 to be treated.

After the crushing, the crushed pieces 101 dried by the drying means 500 or the small pieces to be processed 102 obtained by further crushing the crushed pieces 101 as necessary are in a state where the attached matter is easily separated by the above-mentioned drying. The crushed pieces 101 or the small pieces to be treated 102 in such a state are subjected to an impact grinding force by means of a dry cleaning / classification / size control means 130 to further dry the deposits 104. The impact crushing force separates the crushed pieces 101 or the small pieces to be processed 102 into the resin material and the adhered substance 104, and separates the resin material and the adhered substance 10 from each other.
4 is classified, the resin material is sized, and the sized resin material is collected as a collected resin material 103.

Then, the recovered resin material 103 is recovered.
Is extruded together with a cellulosic crushed material such as wood flour, and is regenerated into a hollow wood composite board 29 having a cavity inside which can be used in various applications.

[0031]

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

1. Target Waste Resin Molded Article The target waste resin molded article treated by the method and apparatus of the present invention is a used waste agricultural film made of polyvinyl chloride (PVC; soft) or the like. Deposits such as pesticides, mud, soil, sand, gravel, metal, agricultural products (leaves and stems), broken glass, and garbage are attached. When this used waste agricultural film is discarded or collected by a trader, it may be wound into a roll, but most of it becomes a large lump that is rounded or folded to an appropriate size. ing.

Further, among the waste agricultural films, those that are piled up in one corner of farmland and stored in the open until the collection is completed, the water content such as rain and dew falls between the folded or rolled films. Sand, mud, soil, and other deposits that have absorbed or absorbed these moisture are often attached to the waste agricultural film.
% Is moisture.

The means for recovering a resin material such as soft PVC from the lump of waste agricultural film will be described below.

2. Processing Method As shown in FIG. 1, the method for collecting and granulating a waste resin molded article of the present invention includes a [crushing step], a [drying step], a [dry cleaning /
Classification / grain sizing step], and before or after the above-mentioned [drying step] (“after” in FIG. 1) as necessary, the crushed pieces 101 formed in the above-mentioned [crushing step] can be further finely treated. The method includes crushing into small pieces 102 [crushing step]. Further, the recovered resin material 10 having undergone the above steps
3 can be sent to the sieve sorting step, where the recovered resin material 103 can be further classified.

Step 1 [Crushing Step] This step is performed by using soft PV of a discarded agricultural greenhouse.
A crushing means 1 as shown in FIG.
This is a step of cutting into pieces of an appropriate size or crushing the pieces in a broad sense using 10 and dividing the pieces into pieces each having a side of about 20 to 30 mm to form crushed pieces 101.

In this step, the waste agricultural film, which is a lump, is crushed to the above-mentioned size, so that water such as rainwater and dew enclosed between the overlapping films flows out and is removed. Is about 14-1
It becomes 5 wt%.

The crushed pieces 101 need not all be crushed into small pieces having the above-mentioned size, but a plurality of small pieces are connected at one end thereof in a bead-like manner. In addition, a crushed piece larger than the above-mentioned small piece may be included.

[Crushing means] The crushing means crushes the material to be crushed to form crushed pieces 101 of an appropriate size. In this embodiment, it is referred to as a "crusher" for convenience.

FIG. 1 shows an example of a "crusher". The crusher 110 is provided with two axes rotating inward each other in parallel in a crusher main body having an input port for crushed material at an upper portion, and a plurality of rotary blades provided at predetermined intervals on each axis,
A lump of waste agricultural film collected by three claw blades meshing with each other on the outer periphery of each rotary blade of each shaft and projecting so as to form an equal angle on the outer peripheral surface of each rotary blade is formed into crushed pieces composed of appropriately large fragments. It is provided to cut.

A lump of waste agricultural film made of a soft PVC film of an agricultural plastic greenhouse, which is a waste resin molded product introduced from the upper inlet, rotates inward with respect to each other.
It is pulled inside by the claw blade of the rotating blade of the shaft, and is crushed and cut by the compressive force that acts at the time of pulling in while being slit by the continuously acting shear force between the outer peripheral edges of the rotating blade that rotates while meshing At the same time, moisture such as rainwater and dew enclosed between the films is squeezed out to form crushed pieces 101 having a moisture content of about 14 to 15 wt%. The crushed pieces 101 are discharged from a discharge port provided below the biaxial rotary blade. At this point, each crushed piece 101
The above-mentioned deposits such as pesticides and mud adhere to the surface, and have a substantially black color.

The crushed pieces 101 formed by the crushing means have a rectangular shape having a shape corresponding to the interval between the claw blades when the amount of waste agricultural film to be processed is small or after the clearance of the rotary blade is set. Crushed pieces, in this embodiment 2
A crushed piece 101 of 0 mm to 30 mm square, and an amorphous crushed piece crushed to a size substantially the same as this are formed. When the set interval is shifted with the elapse of the operation time, the tips of the opposing claw blades do not completely mesh with each other, and one end of the rectangular small piece has a band shape connected to each other in a bead shape. Crushed pieces 101 'and the like may be mixed.

The crushing means is not limited to the crusher described above. For example, various mono-cutters, shredders, crushers, etc., such as Gainax crusher manufactured by Horai Co., Ltd. or roll crusher manufactured by Nara Machinery Co., Ltd. Crushing means 110 can be used.

Step 2 [drying step] The crushing means in the above-mentioned step 1 [crushing step]
FIGS. 2 and 3 show a rectangular crushed piece 101 30 mm square, a strip-shaped crushed piece 101 ′ in which the rectangular crushed pieces are connected in a bead shape, and other crushed pieces crushed into an irregular shape. It is dried to a water content of 5 wt% or less, preferably 3 wt% or less in about 5 minutes using the drying means 500, and at the same time, is stirred in the drying means 500 to form the above-mentioned rosary-like band. Crushed pieces 101 ′ are 20-30 mm on a side
The crushed pieces are crushed into crushed pieces 101 of approximately the same size.

By this [drying step], the crushed pieces 101
By drying the water content to the above-mentioned water content, the attached matter is dried and a part thereof is separated and separated and removed in this step. Process) can be easily separated.

In the embodiment of the present invention, an example in which the [drying step] is performed before the [crushing step] described below has been described.
This [drying step] may be performed on the small piece 102 to be processed after the [crushing step] described later.

[Drying Means] An example of the drying means used in this step is shown in FIGS. In FIG. 3, 5
Reference numeral 00 denotes a dryer used in the present process. The dryer 500 has a bottom surface that is curved and formed into a semi-cylindrical shape.
A screen 510 having a large number of small holes of 3.5 mm is provided on the bottom surface corresponding to a ４ arc.
An openable / closable discharge door 515 for collecting the dried small pieces 82 to be processed is formed, and includes a storage unit 513 and a recovery unit 514 for deposits and the like located below, respectively. Also, 70-80 ° C. is set in the drying chamber 504 of the dryer 500 body.
And a supply inlet 508 that communicates with the inside of the drying chamber 504 at the upper end of the dryer main body 502. The supply inlet 508 is opposed to the supply inlet 508, and the crushed piece 101 or A conveyor 512 for transporting and supplying the small pieces 102 to be processed is arranged.

Further, the drying chamber 504 of the dryer body 502
A rotating shaft 52 connected to a rotating drive source (not shown)
2 is rotatably arranged, and the rotating shaft 522 is provided with a stirring arm 52 radially in a direction orthogonal to the axial direction thereof.
The stirrer arm 524 is configured to stir the crushed pieces 101 or the small pieces to be processed 102 that have been introduced into the drying chamber 504 with the rotation of the rotation shaft 522.

The bottom of the drying chamber 504 is inclined so that the direction of taking out the dried crushed pieces 101 or the small pieces to be processed is downward, and the dried crushed pieces 101 or the small pieces 1 to be processed are inclined.
02 may be discharged from an outlet provided at one end of the drying chamber 504. In this case, as shown in FIG.
It is also possible to implant a scraping arm (not shown) for discharging the 01 or the small piece 102 to be processed from the outlet.

The small pieces 82 to be processed are put into the drying chamber 504 of the dryer 500 configured as described above, and dried by rotating the rotary shaft 522 by a rotary drive source (not shown) while supplying hot air. A portion of the adhered material on the surface of the small piece 82 to be processed is peeled off from the small piece 82 by agitation by the stirring arm 524, and the separated attached matter passes through a screen 510 provided on the bottom surface of the drying chamber 504 to be dried. Room 504
It is discharged to the outside storage part 513 and separated from the small piece 82 to be processed.

At this time, the crushed pieces 1 dried by hot air
01 is crushed by stirring by the stirring arm 524, and a part thereof is crushed piece 101 or the small piece 1 to be treated.
02, the separated deposits pass through a screen 510 forming the bottom of the drying chamber 504, are discharged out of the drying chamber 504, and are classified. Further, by the stirring by the stirring arm 524, the bead-shaped strip-shaped crushed pieces 101 ′ in the crushed pieces 101 are broken up into small pieces, and most of them are formed into small pieces having a side of about 20 to 30 mm. Is done.

By drying for about 5 minutes in this step, the small piece 82 to be processed was dried to a water content of 3 to 5 wt%, and was recovered by opening the discharge door 515 to the recovery section 514.

As an example, as a result of treating 10 kg of the crushed pieces 101 for 5 minutes using a testing machine of the drying means 500, 6.3 kg of the crushed pieces after drying, separated mud, soil, sand, and other deposits 2.5 kg were recovered. Therefore, about 1.2 kg of water has been removed in the [drying step], and the water content of the crushed pieces 101 after drying is about 3.2 to 4.8 wt%.
It became.

The temperature of the hot air supplied into the drying chamber 504 depends on the amount of PVC, which is the raw material of the waste agricultural film to be treated.
Since the temperature is 70 to 80 ° C., which is lower than the melting point of polyethylene or the like, the crushed pieces 101 are dried without melting and the original shape is stopped, and the adhered substances are melted on the crushed pieces 101 to be in a state where they cannot be separated. Never.

If the drying in this step is insufficient, the adhered material is once peeled off by the application of an impact-milling force in the [dry cleaning step] described later, but the peeled adhered material is crushed again. It adheres to the piece 101 and makes it difficult to separate and classify the crushed piece 101 and the attached matter. Further, the attached matter containing a large amount of water is not finely crushed, but is not crushed finely.
In order to prolong the processing time in the [dry cleaning step], such as clogging of the screen 151, the treatment in this step is performed until the moisture content of the crushed pieces after drying becomes 5 wt% or less, preferably 3 wt% or less. I do.

Step 3 [Crushing Step] The crushed pieces 101 dried in the above-described Step 2 [drying step] may be crushed by a crushing means 12 as shown in FIG.
0 to be further finely cut or crushed in a broad sense to form a small piece 102 to be processed having a square or other irregular shape with a side of about 10 to 15 mm but a side of about 10 to 15 mm. .

[Crushing means] The crushing means cuts and crushes the dried crushed pieces 101 to form small pieces to be treated 102 of an appropriate size, as described above. "Cutter mill".

FIG. 4 shows a cutter mill 1 as an example of the crushing means.
20 is shown. Reference numeral 121 denotes a cutter mill body, which is a cylindrical casing having an upper surface opening, and the opening is covered with a lid 122 that can be opened and closed. The lid 122 has an input port 123 into which the crushed pieces 101 to be crushed are input into the cutter mill main body 121.

Further, a cutter support 124 is provided in the cutter mill main body 121, which is rotatably supported on the bottom surface of the cutter mill main body 121 and is rotated in a horizontal direction by rotation driving means (not shown). Three long rotating blades 125 are provided, and these three rotating blades 125 are disposed so as to form an equal angle of 120 degrees in the rotation direction of the cutter support 124, and the cutting edges of the three rotating blades 125 are the same. It is located on the rotation locus of. Furthermore, the three rotating blades 1
The second fixed blade 126 is fixed to the cutter mill main body 121 at a position substantially symmetrical to the rotation locus of the cutting edge of the rotary blade 125 with a slight gap from the rotation locus of the cutting edge of the 25 blades.
6, the cutter support body 124, and the rotary blade 125 divide the inside of the cutter mill body 121 into two, and form a charging chamber 127 and a crushing chamber 128. The charging port 123 of the lid 122 is connected to the charging chamber 1.
27. The second fixed blade 126 and the rotary blade 12
The clearance with 5 cuts the material to be crushed to the desired size,
Or, in a broad sense, it can be adjusted freely so that it can be crushed. The clearance in this embodiment is 0.2 to 0.3 mm. Further, the crushing chamber 128 is provided between the two fixed blades 126 and the rotary blade 1.
The screen is partitioned by a mesh screen 129 so as to surround the 25 rotation trajectories. The screen 129 is
In this embodiment, a small piece 1 to be processed having a side of about 10 mm
02 is formed of a mesh that can pass through. Further, a discharge port for discharging the small piece to be processed 102 is provided at a lower end of the cutter mill main body 121 of the crushing chamber 128.

In the cutter mill 120 described above, the lid 12
The crushed pieces 101 each having a size of about 20 to 30 mm on one side, formed by the crusher 110 of the above-described step 1 [crushing step], are introduced from the charging port 123 of the second section 123, and the cutter support 124 is rotated by rotation driving means (not shown). When rotated, the crushed pieces 101 are indeterminate in shape and area through the screen 129 between the rotary blade 125 and the fixed blade 126 of the cutter support 124, but are indeterminate.
Substantially the entire amount is formed into a small, rectangular, or other irregular shaped piece 102 having a side of about 10 to 15 mm, and is discharged from the discharge port to the next step.

The crushing means is not limited to the above-mentioned cutter mill. For example, as in the case of a hard crusher manufactured by Horai Co., Ltd., the rotary shaft of the rotary blade 125 is provided in the horizontal direction and the two fixed blades are provided. Some screens 129 between 126 are provided below. At this point, each crushed piece 10
The deposits such as the above-mentioned pesticides and mud are further dropped off from the surface of No. 1 to give a substantially opaque thin black color.

Step 3 [Dry washing, classification and sizing step] After the above step 2 [Drying step], one side is about 20 to 3
A crushed piece 101 of about 0 mm, or this crushed piece 101 is further finely crushed as necessary, and an impact grinding force is applied to a small piece 102 to be processed having a size of about 10 to 15 mm on a side,
The crushed piece 101 or the small piece 10 to be treated is
2. Perform dry washing to separate and adhere to the surface of the surface of No. 2 and pulverize it into a rectangular or irregular shape having a side of 1 to 2 mm or less. Material is 1mm in diameter and 10mm in length
Granulated, polished, and sized in about 1 minute and 30 seconds into a rectangular or cylindrical shape or other irregular shape having a size of about 2 to 5 mm on a side, and the crushed pieces 10
1 or a soft PVC is separately classified from the adhered substance peeled off from the surface of the small piece 102 to be treated.
Classification and sizing for recovering resin such as VC as a resin material is performed (dry washing, classification and sizing step). The above steps can be repeated any number of times as needed.

[Dry Cleaning / Classification / Grain Size Control Means] An example of the configuration of the entire apparatus including the dry cleaning / classification / size control means used in the method of the present invention (referred to as a “separator” in the present embodiment for convenience). FIG.

Referring to FIG. 7, the outline of the entire separator 130 will be described first. The separator 130 is provided with a supply inlet 132 into which each crushed piece 101 or the small piece to be processed 102 is charged.
2 is processed in the separator 130 to obtain crushed pieces 1
01 or an outlet 15 for taking out the recovered resin material 103 formed by removing the adhered substance 104 from the small piece 102 to be processed
3 and an outlet 152 for discharging the adhered substance 104 separated and pulverized from the recovered resin material 103.

Each of the crushed pieces 101 or the small pieces 102 to be processed in the previous step is supplied to the supply
1. The outlet 153 communicates with the supply inlet 132 through a communication pipe 235.
Pipe 2 from a compressed air supply source (not shown)
36. A flow straightening plate is provided at a communication portion of the pipe 236 so that compressed air mainly flows to the supply inlet 132 side. Further, the branch pipe 2 that branches the communication pipe 235 and communicates with the recovery tank 240 of the recovered resin material 103
At the branch point of the branch pipe 237, there is provided a three-way solenoid valve 238 that can be switched at appropriate time intervals by, for example, a timer circuit. On the other hand, the discharge port 152 is connected to the discharge pipe 2
39 to the collection tank 250 and the outlet 152
The adhering matter 104 and dust and the like discharged from the
7 and the collection tank 250
It is configured to be collected to

The internal structure of the separator 130 will be described with reference to FIGS. 5, 6A and 6B.
The above-described supply inlet 132 is opened to communicate with the center of a fixed disk 131 serving as a cleaning / granulating means, and the fixed disk 13
The fixed end plate 133 faces the fixed disk 131 with the processing space 155 therebetween, and the outer peripheral edge of the fixed end plate 133 is fixed to the fixed disk 131 by the peripheral side plate 135. The processing space 15
In 5, the cleaning and rotation driven by the rotation horizontal shaft 142.
A movable disk 141 is provided as sizing means,
2 is pivotally supported by each bearing 143,143. The rotation horizontal shaft 142 is rotationally driven by a rotation driving unit such as a motor 161.

Then, on the fixed disk 131, there are a plurality of concentric circles (relative to the movable disk 141) of rotation trajectories a _{1 to} a ₆ (FIG. 6B). The fixed pins 134 are sequentially implanted on the movable disk 141, and the rotation trajectories of the fixed pins 134 on a plurality of rotation trajectories b _{1 to} b ₆ different from the fixed pins 134. Movable pins 144 as polishing and sizing means alternately interposed between the fixed and movable pins 134 and 144 are successively implanted, and the crushed pieces 101 or the crushed pieces are applied between the fixed and movable pins 134 and 144 by an impact grinding force. The small pieces 102 are arranged so that the adhered substance 104 on the surface of the processing piece 102 can be separated or separated.

More specifically, the number of the fixing pins 134 is 16 on the rotation trajectory a ₁ near the center of the fixed disk 131.
This rotation locus a positioned on the outer peripheral side of the rotation locus a ₁
24 is a top _2, 32 is on the rotary locus a ₃ sequentially positioned toward the more outer peripheral side, 36 present in the upper rotation locus a _4, 40 present in the upper rotation locus a _5, 42 present in the upper rotation locus a ₆ Are planted respectively. On the other hand, the number of the movable pins 144 is four on the rotation trajectory b ₁ near the center of the movable disk 141, four on the rotation trajectory b ₂ located on the outer periphery side of the rotation trajectory b ₁ , and more on the outer periphery. Four on the rotation trajectory b ₃ , _four on the rotation trajectory b _{4, four} on the rotation trajectory b ₅ , and _six on the rotation trajectory b ₆ , which are sequentially located toward the trajectory b ₃ .

In practice, the fixed and movable pins 134, 1
The grinding force applied to the crushed pieces 101 or the small pieces to be processed 102 is reduced by increasing the clearance between the pieces 44, and the grinding force is increased by reducing the clearance.

Further, in FIG. 5, a discharge space 15 is provided on the outer peripheral side of the movable disk 141 and on the inner peripheral side of the peripheral side plate 135.
A screen 151 of a predetermined mesh in which pores having a desired diameter are formed by punching is provided around the screen 6, and a discharge port 152 is provided below the discharge space 156. In this embodiment, the screen 151 is a mesh having a diameter of 1 mm, but is usually a mesh having a diameter of 1 mm or less, preferably a mesh having a diameter of 0.7 mm.

The screen 151 of the processing space 155
An outlet 153 is provided in the lower part of the
Reference numeral 3 denotes a collection tank 240 for communicating with the supply inlet 132 via the communication pipe 235 as described above, and for collecting the resin material collected via the branch pipe 237 which branches off the supply inlet side of the communication pipe 235. In communication with As another example, a plug valve for opening and closing control is provided in the outlet 153, and the outlet 153 is supplied and supplied through a blower 158 that sucks air in the separator 130 as shown in FIG. It can also communicate with the mouth 132.

Therefore, in the separator 130 described above, the rotating disk 142 is rotated by the rotation driving means of the motor 161 to rotate the rotating horizontal shaft 142, and the movable disk 141 is rotated by the rotation driving means.
Supply each crushed piece 101 or the small piece to be treated 102 to the supply inlet 13
2, each crushed piece 101 or the small piece 102 to be treated
Is located at the center of the processing space 155, and the crushed pieces 101 or the small pieces 102 to be processed are fixed between the fixed and movable pins 134 and 144 as the blasting and sizing means by the impact crushing force.
Is adhered to the surface by being hit by the impact of the fixed and movable pins 134 and 144, and the adhered substance 104 adhered to the surface is finely crushed, and finely crushed because the bending action is repeatedly applied to each crushed piece 101 or the small piece 102 to be processed. The deposit 104 is separated from the surface of the crushed piece 101 or the small piece 102 to be treated.

Further, the frictional heat of each of the crushed pieces 101 or the small pieces 102 due to the impact grinding force increases the surface temperature of the crushed pieces 101 or the small pieces 102 to be treated, and the crushed pieces 1
01 or the adhered substance 104 is easily peeled off from the surface of the small piece 102 to be treated. That is, the temperature of the adhered substance 104 rises due to frictional heat, so that the adhered substance 104 is dried and hardened. In this state, the adhered substance 104 is repeatedly beaten and bent by the impact of the impact crushing force. It is broken and separated.

The recovered resin material is polished and sized by the application of an impact crushing force, and has a diameter of 1 mm and a length of 10 mm.
The recovered resin material 103 is polished and sized to have a size of about mm or a rectangular or cylindrical shape having a side of about 2 to 5 mm or other irregular shapes. During this time, a part of the resin material in the crushed pieces 101 or the small pieces to be processed 102 may be finely pulverized to a rectangular or irregular shape having a side of 1 mm or less to become fine powder.

The adhering substance 104 separated from the crushed pieces 101 or the small pieces to be processed 102 passes through the screen 151 by the centrifugal action of each movable pin 144, and is discharged to the discharge space 156.
After being classified into the blower,
It is sucked and discharged outside through (FIG. 6).

In this embodiment, the blower 157 is 37 horsepower, 5 kg / cm ² / pressure,
m ³ / min, 18.5 hp for small aircraft, 5 kg / cm ² /
At a pressure of 1 to 1.5 m ³ / min, the adhered substance 104 separated from the crushed piece 101 or the small piece to be treated 102 is separated into a separator 13.
It sucks in with the air in 0.

On the other hand, the recovered resin material 103 that does not pass through the screen 151 remains in the screen 151. In the case where the crushed pieces 101 or the small pieces 102 to be adhered to the surface thereof are still mixed in the recovered resin material 103, the crushed pieces 101 or the small pieces 102 to be removed from the outlet 153 are removed. And recovered resin material 103
Is returned to the supply inlet 132, and the above operation can be repeated.

Although the recovered resin material 103 is refluxed, most of the recovered resin material 103 remains in the screen 151 without being pulverized as finely as it passes through the screen 151. The above-mentioned dry washing, classification, and sizing process is carried out for the crushed pieces 1 in one batch.
The process can be repeated multiple times as needed until the deposits 01 of the target piece 101 or the small pieces 102 to be treated are almost separated and removed through the discharge port.

The above-described separator 130 is rotated by the rotation driving means 1.
61, the downstream side of the communication pipe 235 is opened by a three-way solenoid valve 238 and the branch pipe 237 side is closed,
By supplying the compressed air from the pipe 236 to the communication pipe 235, the compressed air generates an airflow that circulates from the communication pipe 235 to the supply inlet 132, the processing space 155, the outlet 153, and again to the communication pipe 235. When one batch of each crushed piece 101 or the small piece to be processed 102 is supplied to the supply inlet 132 through the supply pipe 231, the adhered substance 104 that is processed in the separator 130 and separated from the surface of the crushed piece 101 or the small piece to be processed 102 is removed. The resin material remaining in the screen 151 is sucked into the communication pipe 235 by the circulating airflow, is again fed to the processing space 155 and is processed in the separator 130 through the screen 151 by the blower 157. , This series of steps is 1
Repeat as many times as necessary until most of the deposits 104 in the batch are separated and removed. Next, after the above processing is completed, the downstream side of the communication pipe 235 is connected to the three-way solenoid valve 23.
By closing at 8 and opening the branch pipe side, the recovered resin material 103 remaining in the screen 151 is recovered from the communication pipe 235 to the recovery tank 240 via the branch pipe 237.

Note that, instead of the three-way solenoid valve 238, a solenoid valve for opening and closing the branch pipe 237 and the communication pipe 2
It is also possible to provide an electromagnetic valve that opens and closes the downstream side of 35, and to open and close these two electromagnetic valves alternately.

In addition to the above-described method for treating a resin material,
Depending on the state of the collected waste agricultural film, for example, whether it is wound in a roll or the degree of contamination, the order of each of the steps 1, 2, 3 is reversed, or The resin material can be recovered by omitting any one of the steps 1 and 3.

In the above example, about 60% by weight of the waste and about 6 kg of the recovered resin material were obtained by the treatment for 1 minute and 30 seconds by the above process.

The screen 151 is made of a mesh having a diameter of 2 mm to further increase the processing capacity of the separator.
The pipe for feeding the adhering substance 104 containing the collected resin material 103 sucked by the blower 157 to the collection tank 250 via the first step is branched into 1.5 mm for the first step, 1.0 mm for the second step, and
It is also possible to pass through a three-stage sieve having a mesh of 0.5 mm and collect the collected resin material 103 remaining on each of the sieves into a separately installed collection tank. After being formed into pellets, the recovered resin material 103 is suitable for recycling as an agricultural sheet for directly covering ridges.

3. Molding Step The recovered resin material 103 obtained by the method and apparatus of the present invention described above can be directly injected into a molding machine such as an extruder to be molded into another molded product, or in the form of a molding resin material. Pellets can be formed into a certain pellet, or the recovered resin material 103 and a virgin resin material of the same quality can be kneaded, and for example, in the case of soft PVC, virgin hard PVC can be kneaded to form a pellet. It can be formed into a product, and can also be used as a raw material for a wooden synthetic board.

The water content is set within 15 wt% and the average particle size is 2
30 to 70% by weight of cellulosic crushed material having a mesh size of 0 mesh or less is dried to a moisture content of 0.5% by weight or less, preferably 0.1% by weight or less by frictional heat generated by the rotation of the stirring impellers 85, 86, and 87. 25-80 wt% of the recovered resin material is mixed with the crushed cellulosic material, gelled and kneaded by frictional heat generated by rotation of the stirring impeller, and air-cooled at room temperature or pulverized by cooling by appropriate means to obtain a particle size of 10 mm or less. Preferably, when the woody synthetic powder obtained by sizing to 5 mm or less, more preferably 3 mm or less is put into the hopper 73 of the extruder 70, the familiarity between the woody powder and the thermoplastic resin molding material is further improved. Thus, a dough in a good kneaded state that can reduce the frictional resistance of wood flour is formed.

Production Example of Woody Synthetic Powder In FIG. 18, reference numeral 80 denotes a fluid mixing and kneading means for mixing and kneading the raw materials, cooling and pulverizing to form “granulated wood flour”. It is called "mixer".

Reference numeral 81 denotes a mixer main body, which is a cylindrical casing having a top surface opening and having a capacity of 300 liters. The opening is an input port 94 for charging raw materials into the mixer main body 81, and the input port 94 is opened and closed. It is covered with a free upper cover 82. A gas discharge pipe 95 for discharging a large amount of water vapor or wood acid gas generated from wood flour in the mixer main body 81 is connected to the upper lid 82. Furthermore, the mixer body 8
One outlet 88 is provided on the outer peripheral surface near the bottom surface of the cylinder 1, and a lid 89 for covering the outlet 88 is provided at the tip of a rod of a cylinder 91.
Is provided so that it can be opened and closed freely. A discharge duct 93 communicates with the discharge port 88.

Further, a shaft 83 which rotates at a high speed of 820 rpm / max by a rotary driving means of a motor 37KW (DC) (not shown) is supported on the center of the bottom surface of the mixer body 81 upward in the mixer body 81. A scraper 84 and stirring impellers 85, 86, 87 are arranged on the shaft 83 in order from the bottom to the top.
And tightened with a tightening nut 92 from the tip of the shaft 83. The shape of each of the stirring impact blades 85, 86, 87 is not particularly limited, but in the present embodiment, the blades are two blades symmetric about the axis 83. When three stirring impellers are stacked as shown in FIG. 18, the blades are composed of a total of six blades, and these six blades are equally angled by dividing 360 degrees into six in a plane (60).
Degrees) and overlap with each other. In the case where a plurality of stirring impellers are provided, it is preferable that the stirring impellers are overlapped with each other at an angle obtained by equally dividing 360 degrees in terms of the total number of stirring impellers in terms of efficiently mixing the raw materials.

The scraper 84 rotates while slightly sliding on the bottom surface of the mixer body 81 and rotates.
The raw material kneaded in 1 is scraped out so as not to remain on the bottom surface of the mixer body 81, and the raw material is circulated.

The raw materials to be introduced from the introduction port 94 by opening the upper lid 82 are wood flour, which is a crushed cellulosic material, the recovered resin material 103, and, if necessary, urea, calcium carbonate, titanium oxide, pigment and the like. Consists of additives.

The calcium carbonate provides good dimensional stability to the hollow wood composite board of the present invention and contributes to significantly reducing expansion and contraction due to temperature change. And is inexpensive itself.

The titanium oxide has good fluidity and good dispersibility in a solution, and contributes to significantly reducing expansion and contraction of the hollow wood composite board of the present invention due to temperature change.

The thermoplastic resin molding material is made of soft vinyl chloride (PV) recovered from the waste agricultural film by the method described above.
One type of resin such as C), polyethylene, and polycarbonate, or a mixture of several types thereof can be used.

Similarly, a mixture of one or several of the above-mentioned recovered resin materials and a virgin thermoplastic resin at an appropriate mixing ratio can also be used.

The recovered resin material may be used as it is after being granulated and recovered, but it is preferable to use a fine powder of 60 mesh or less from the viewpoint of good dispersion.

When the thermoplastic resin molding material as the recovered resin material 103 is PVC, the mixing ratio of wood powder is 30 to 60 wt.
%, Preferably 45% by weight.

The granule sizing means is to cool the “granulated wood flour” formed by the above-mentioned fluid mixing and kneading means at room temperature by air cooling or by appropriate means to obtain a particle size of 10 mm or less, preferably 5 mm.
More preferably, it is sized to 3 mm or less to form “woody synthetic powder”.

As the sizing means, the same cutter mill 120 (FIG. 4) as used in the above-mentioned [crushing step] is used.
Can be used.

Hereinafter, a method of manufacturing a hollow wooden synthetic board using the recovered resin material 103 of the present invention will be described.

In FIG. 8, reference numeral 70 denotes a single-screw extruder. Generally, the extruder is usually of a screw type, and there are a single-screw extruder and a multi-screw extruder, which have a modified form or a combination thereof. In the present invention, any extruder can be used.

Reference numeral 71 denotes a screw, which is a single shaft type. The screw 71 is driven by a motor (not shown) via a gear reducer 72 and rotates in a barrel 74. With the rotating screw 71, the cellulosic crushed material fed from the hopper 73 and the thermoplastic resin molding material, which is the recovered resin material 103 recovered by the method and apparatus of the present invention described above, are kneaded toward the front of the screw 71. Extruded. A band heater 75 is provided on the outer surface of the barrel 74, and the cellulosic crushed material and the resin in the barrel 74 are heated by the band heater 75, and gradually melted while being transported forward along the groove of the screw 71, and the cellulose crushed. The material and the resin are kneaded. Then, the extruded material 79 is extruded from the extrusion die 19 of the adapter 17 to the forming die 10 via the screen 76 and the adapter 17.

Extrusion Die In FIGS. 8, 16 and 17, the extrusion die 19 at the end of the barrel 74 has a slender rectangular shape having an injection port with a width of 50 mm and a height of 13 mm having a thickness of about 8 mm. (FIG. 17
), The inside diameter of the rear end face of the adapter 17 is 50 mm
A communication hole whose cross section is gradually deformed is formed from the inflow port 18 toward the injection port of the extrusion die 19. The inflow port 18 is formed to have the same size as the injection port having a circular cross section of the extruder 70, while the rectangular width of the extrusion die 19 is formed to be the same as the diameter of the inflow port 18, and the height will be described later. It is preferable to form the same size as the height of the forming chamber 22 of the forming die 10.

The adapter 17 and the extrusion die 19 can be formed into various sizes according to the size of the extruder 70. For example, when the diameter of the inflow port 18 is 150 mm, the rectangular width of the extrusion die 19 is reduced. The height may be 150 mm, and the height may be 13 mm, which is the same as the height of the molding chamber 22.

The rear end of the adapter 17 is
The extruder 70 is connected to the distal end surface of a screen portion having a screen 76 (FIG. 8) by a fixture such as a bolt via a fixture 28 fitted on the outer periphery of the extruder 70.
And the screen part of the extruder 70, while the tip of the extrusion die 19 has a rectangular cross-section leading end at an introduction part 11 having a rectangular cross-section formed substantially at the center of the rear end face of the molding die 10. The extrusion die 19 and the introduction portion 11 of the molding die 10 are communicated with each other.

A heater as a heating means may be buried in the peripheral wall of the communication hole of the adapter 17. in this case,
The extruded fabric 79 extruded from the outlet of the screen unit 16 of the extruder 70 flows in from the inflow port 18 of the adapter 17, passes through the communication hole while being heated and kept warm by the heater, from the extrusion die 19 to the introduction part 11 of the forming die 10. Flows to The flow state of the extruded dough 79 is good. Moreover, unlike the general die, the extrusion die 19 is formed in a shape capable of discharging a large amount of molten raw material (woody synthetic powder) due to a large injection port and promoting compaction. The clogging of the die as in the case of the die does not occur.

9 to 12, a molding die 10 is an extruder 70.
And a molding chamber for molding the extruded dough 79 extruded from the injection port of the extrusion die 19 having a rectangular cross section into a wide and predetermined thickness. In this embodiment, the molding chamber 22 has an elongated rectangular cross section having a width of 550 mm and a height of 13 mm.

Reference numeral 11 denotes an introduction portion, which is formed in the forming die 10 in the width direction of the forming die 10 and is formed substantially equal to or slightly larger than the width of the extrusion die 19, and has a cross section in the width direction of the forming die 10. Both ends of the introduction chamber 13 which extends in a curved manner extend to both ends in the longitudinal direction of the molding chamber 22, and are formed in a so-called coat-hanger type.

The introduction chamber 13 may be formed as a straight / manifold type in addition to the coat / hanger type, but the extruded material 79 flowing in the introduction section 11 and the introduction chamber 13 is excellent in fluidity. In this respect, the above-mentioned curved coat hanger type is preferable.

Further, a sheet 24 made of a fluororesin described later is preferably attached to the introduction section 11 and the introduction chamber 13.

The molding chamber 22 is formed by forming two metal plates having heating and cooling means into upper and lower metal plates and having a rectangular cross section with metal spacers (not shown) arranged on both side edges. Is adjusted so that the desired thickness of the hollow wooden composite board can be obtained.

The forming die 10 has, for example, a width of 550 m.
m, forming a narrow rectangular cross section with a height of 13 mm.
The distance (distance in the extrusion direction) from the inlet of No. 2 to the die outlet 23 is 1,000 mm.

Structure Inside the Molding Die The inner walls of the molding chamber 22 at the upper, lower, left and right sides have a thickness of 0.2 mm.
A sheet 24 made of fluororesin of 5 mm is stuck. Alternatively, fluorocarbon resin may be directly coated on the inner walls of the upper, lower, left, and right sides of the molding chamber 22. However, since fluorocarbon resin is easily exchanged, fluorocarbon resin coating is easy, and the durability is high, the fluorocarbon resin is easily coated. It is particularly preferable to attach a resin sheet 24.

The sheet 24 is particularly preferably formed by coating a surface of a glass woven fabric with a fluororesin film.
FE, Teflon FEP, Teflon CTFE, Teflon V
dF and the like. The glass woven fabric may be a nonwoven fabric of glass fiber.

The above-mentioned fluororesin coating can be applied to the upper and lower inner wall surfaces of the molding chamber 22, that is, the inner wall surfaces corresponding to the front and back surfaces of the hollow wood composite board. It is desirable to apply it to the entire upper, lower, left and right inner wall surfaces of the molding chamber 22.

In FIG. 11, reference numeral 14 denotes a heater, which comprises heating means such as an electric heater, for heating and keeping the extruded dough 79 and maintaining the fluidity of the extruded dough 79, so that the extruded dough 79 has a length of four minutes in the longitudinal direction. The four pipes are inserted at equal intervals into the upper and lower forming dies 10 of the forming chamber 22 corresponding to the melting section 21a including the introduction section 11 extending over one.

Reference numeral 25 denotes a cooling pipe, which is an example of a cooling means for cooling the slow cooling portion 21b of the molding chamber 22 of the molding die 10, and is provided at appropriate intervals in the extrusion direction of the molding chamber 22.
A cooling liquid as a cooling medium such as water at room temperature or water or oil up to about 70 to 80 ° C. is supplied to the cooling pipe 25 to cool the extruded fabric 79 in the molding chamber 22. In order to improve the slow cooling effect of the extruded dough 79 in the forming chamber 22, the cooling pipe is provided in the slow cooling section 21b, which occupies three-quarters toward the die outlet 23 of the forming die 10, in the forming chamber 22. The pipes are inserted through the upper and lower forming dies 10 at equal intervals. Note that the cooling pipes 25 can be provided so as to gradually narrow the gap therebetween, or the cooling pipes 25 can be provided on the outer wall of the forming die 10. However, it is sufficient that the extruded material 79 in the forming chamber 22 can be cooled. However, the present invention is not limited to the structure of this embodiment.

9 to 12, the core 40 has an arc-shaped base 44 and an inclined portion 4 inclined toward the die outlet 23.
3 is provided integrally with the guide portion 15 having the
And a molding guide portion 41 having a substantially comb-like shape as a whole, and formed as a rod-shaped member having a rectangular cross section of 7 and having a total length of 800 mm and a width of 35 mm, and a substantially half of the guide portion 15 side located at the melting portion 21a. From the forming guide portion 41, to the die exit on both sides in the thickness and width directions, the annealing portion 2 having a taper of 1/1000.
1b.

The guide portion is provided in the introduction chamber of the forming die so as to have a total length of 70 to 95% of the total length in the width direction of the introduction chamber, and at a height of 70% or less of the height of the introduction portion. Also, from the guide portion 15 of the core body 40 to the tip die outlet 2
One quarter toward 3 is located in the melting section 21a of the molding chamber 22, and the other is located in the slow cooling section 21b.

The molding guide portion 41 of the core body 40
Is formed linearly at the same thickness in the center of the forming die at a thickness of 45% or less of the height of the forming die, and the thickness of the drawing guide portion 42 is tapered toward the tip of the die outlet 23.

The cores 40 are arranged in a plurality of rows at intervals of four-sevenths of the width of the cores 40 in the longitudinal direction of the molding chamber 22, that is, in parallel with the extrusion direction.

The guide portion 15 and the core body 40 are formed by attaching a sheet made of a fluororesin such as Teflon having a thickness of 0.1 to 0.5 mm on the entire outer surface. The guide portion 15 is provided in the introduction chamber 13 having a height of 13 mm and a width of 550 mm in the width direction of the introduction chamber 13 with respect to both side edges of the molding chamber in the width direction by 50 mm.
And the rear end of the guide portion 15 is positioned so as to be substantially parallel to the rear end wall surface of the introduction portion 11, and the guide portion 15 is placed on the forming die 10.
Then, as shown in FIG. Therefore, a gap is also formed between the upper surface of the guide portion 15 and the upper surface of the introduction hole 13.

The guide 15 and the core 40 are
The thickness, width, and interval can be appropriately selected according to the volume of the molding chamber 22.

Brake means In FIGS. 13 and 14, three free pinch rollers 3
The bearings 34a bearing both ends of the shaft 1b are respectively fixed to the bearing fixing frame 36, and the fixed pinch roller 31a is interlocked with the gear 116 provided on each shaft and the gear 117 meshing with the gear 116, and three gears are interlocked. The input shaft of the powder brake 115 is connected to the shaft of one of the fixed pinch rollers 31a. Powder brake 115
Is a so-called electromagnetic brake, which can finely adjust the friction torque electrically.

Further, a frame 114 is erected on the bearing fixing frame 36, and two block-shaped guides 119 each having a guide groove formed on the wall surface of the frame 114, and the axis of the 119 is oriented vertically. And the bearings 34b are provided substantially parallel to each other, and are provided so as to be vertically movable along the guide grooves of the guide body 119, and the bearings 34b are provided on the upper surface of the frame 114, respectively. Are connected to the tips of the rods of the three air cylinders 118 provided in the first and second air cylinders.

Therefore, by the operation of the cylinder 118, the three free pinch rollers 31b are respectively pressed against the fixed pinch rollers 31a via the hollow wood composite board 29, and one of the three fixed pinch rollers 31a is fixed. The shaft of the pinch roller 31a is suppressed from rotating by the powder brake 115, and the gear 116 provided on the shaft of the fixed pinch roller 31a is connected to the other two fixed pinch rollers 31a, 31.
The gears 117, 11 provided on the gears 116, 116 provided on the shaft
7, the same rotation suppressing force by the friction torque of the powder brake 115 acts on the three fixed pinch rollers 31a.

Incidentally, the friction torque for suppressing the rotation of the fixed pinch roller 31a by the powder brake 115 is as follows.
The thickness is adjusted according to the thickness of the hollow wooden composite board 29 to be formed.

Therefore, the friction torque of the powder brake 115 acts as a restraining force against the pushing force of the hollow wood composite board 29, and the extruded material 79 in the introduction portion 11 of the forming die 10.
Is made even more dense and uniform, and this uniform and high-density extruded fabric 79 is advanced by the pushing force of the extruded fabric 79 by the extruder 70 against the restraining force of the brake means 30, and And the hollow wooden composite board 29 is formed. The hollow wood composite board 29 advances while rotating the fixed pinch roller 31a and the free pinch roller 31b against the restraining force of the powder brake 115.

The above-mentioned restraining force exerts a resistance against the extruding force of the extruded material 79 in the molding chamber 22 applied by the extruder to the extruded material 79 in the molding chamber 22 and the introduction part 11 through the hollow woody synthetic board 29. By giving, the density of the whole extruded material 79 in the molding chamber 22 becomes more uniform and high. Since the density of the extruded dough 79 is increased by applying the suppressing force to the hollow wooden synthetic board 29, the generation of bubbles, nests and the like is prevented. Therefore, a hollow wood composite board which is more uniform, denser and lighter is formed.

The hollow wood composite board manufactured as described above is cut to a desired length by a cutting machine such as a cutter, a shearing machine, a sawing machine or the like, and is used for materials for car interior and exterior, desks and tables, cupboards, floor boards, Wood composite boards that can be used in various applications such as building materials such as wallboards and furniture materials can be obtained.

The hollow wooden composite board having a hollow inside is lightweight, and when used as a floor material or a wall material, is hollow, so that it is excellent in heat insulation and soundproofing properties, and furthermore, is used for electrical wiring and the like. It can be conveniently arranged in a hollow space.

[0131]

As described above, in the method for collecting and granulating waste resin molded articles of the present invention, by providing a drying step and a drying means, the resin material produced in the conventional method and apparatus can be obtained. Thus, a method and an apparatus for collecting and granulating a waste resin molded article, which can easily separate and classify the resin material and attached matter and can shorten the processing time required for collecting the resin material, can be provided.

Further, by providing a method for manufacturing a hollow wood composite board that can be used for various purposes by using the recovered resin material recovered by the method and the apparatus as a raw material, the method is capable of being recovered by the method and the apparatus. The useful resin material can be given a useful use, and in combination with the above-described method and apparatus, it is possible to promote the collection and reuse of the waste resin molded product.

[Brief description of the drawings]

FIG. 1 is a schematic diagram conceptually showing steps of a method of collecting and granulating a waste agricultural film, which is an example of a processing target of the present invention.

FIG. 2 is a schematic view of a dryer (drying means) used in an example of a drying step of the present invention.

FIG. 3 is a schematic cross-sectional view at the center of the dryer in FIG. 5;

FIG. 4 is a schematic perspective view of a cutter mill showing an example of a crushing unit.

FIG. 5 is a schematic cross-sectional view of a main part of a dry cleaning / classifying / sizing unit.

FIG. 6A is a plan view of FIG. 5; (B) It is principal part sectional drawing of the arrow VV line of FIG.

FIG. 7 is an overall perspective view of a separator used for dry cleaning, classification, and sizing in FIG. 5 and devices connected to the separator.

FIG. 8 is a partial front longitudinal sectional view showing an example of the extruder of the present invention.

FIG. 9 is a partial plan view showing an example of a forming die of the present invention.

FIG. 10 is a central longitudinal sectional view showing an example of a molding die of the present invention.

FIG. 11 is a perspective view showing an example of a forming die of the present invention.

FIG. 12 is a cross-sectional plan view of a main part showing an example of a forming die of the present invention.

FIG. 13 is a longitudinal sectional view of an essential part showing an example of a molding die of the present invention.

FIG. 14 is a cross-sectional plan view of a main part showing an example of the brake means of the present invention.

FIG. 15 is a vertical sectional view taken along line NN of FIG. 13;

FIG. 16 is a vertical sectional view taken along line JJ of FIG. 7;

FIG. 17 is a vertical sectional view taken along the line KK in FIG. 7;

FIG. 18 is a front view of an entire cross section of a main part showing an example of a mixer (fluid mixing / kneading means) used in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Forming die 11 Introducing part 13 Introducing chamber 14 Heater 15 Guide part 16 Screen part 17 Adapter 18 Inflow port 19 Extrusion die 21a Melting part 21b Slow cooling part 22 Forming chamber 23 Die outlet 24 Sheet (of fluororesin) 25 Cooling pipe 27 Pin 28 Fixture 29 Forming Plate 30 Brake Means 31 Pinch Roller 31a Fixed Pinch Roller 31b Free Pinch Roller 34a, 34b Bearing 36 Bearing Fixing Frame 40 Core 41 Forming Guide 42 Extraction Guide 43 Slope 44 Base 70 Extruder 71 Screw 72 Gear reducer 73 Hopper 74 Barrel 75 Band heater 76 Screen 78 Extrusion die 79 Extruded dough 80 Mixer (flow mixing and kneading means) 81 Mixer body 82 Top lid 83 Shaft 84 Scraper 85, 86, 87 Stirrer impact blade 8 8 Discharge Port 89 Lid 91 Cylinder 92 Tightening Nut 93 Discharge Duct 94 Input Port 95 Gas Discharge Tube 101, 101 ′ Crushed Piece 102 Small Piece to be Treated 103 Collected Resin Material 104 Deposits 110 Crusher (Crushing Means) 114 Frame 115 Powder Brake 116 , 117 gear 118 cylinder 119 guide body 120 cutter mill (coarse crushing means and sizing means) 121 cutter mill body 122 lid 123 input port 124 cutter support 125 rotating blade 126 fixed blade 127 input chamber 128 sizing chamber 129 screen 130 separator (dry type) 131, a fixed disk 132, a supply inlet 133, a fixed end plate 134, a fixed pin 135, a peripheral side plate 141, a movable disk 142, a rotating horizontal axis 143, a bearing 144, a movable pin 151, a screen 152, and a discharge port 153. Outlet 154 Plug valve 155 Processing space 156 Discharge space 157 Blower 158 Blower 231 Supply pipe 125 Communication pipe 236 Pipe 237 Branch pipe 238 Three-way solenoid valve 239 Discharge pipe 240 Recovery tank 250 Repair tank 500 Dryer (drying means) 502 Dryer body 504 Drying chamber 506 Burner (heating means) 508 Supply inlet 510 Screen 512 Conveyor 522 Rotary shaft 524 Stirring arm

Claims (11)

[Claims] 1. A method for separating adhering matter from a waste resin molded product and recovering a resin material, wherein a processing target is a waste agricultural film, and the waste agricultural film is crushed to form a plurality of crushed pieces. A drying step of drying the crushed pieces to a water content of 5 wt% or less while stirring, and applying an impact milling force to each of the dried crushed pieces to separate the resin material and the attached matter. Dry cleaning step, a classification step of removing adhering matter separated by the dry cleaning step as needed, and a sizing step of sizing the resin material separated from the adhering matter to obtain a collected resin material material. Collection and granulation method of waste resin molded products including. 2. A method for separating adhering matter from a waste resin molded product and recovering a resin material, wherein a processing target is a waste agricultural film, and the waste agricultural film is crushed to form a plurality of crushed pieces. A drying step of drying the crushed pieces to a content of water of 5 wt% or less while stirring the crushed pieces; a crushing step of crushing the dried crushed pieces into a plurality of small pieces to be treated; A dry-cleaning step of applying an impact milling force to separate the resin material and the deposit, a classification step of removing the deposit separated by the dry-cleaning step as needed, and a resin material from which the deposit is separated. And granulating a waste resin molded article, which comprises at least a sizing step of sizing the resulting resin into a recovered resin material. 3. A method for separating adhering matter from a waste resin molded product and recovering a resin material, wherein a processing target is a waste agricultural film, and the waste agricultural film is crushed to form a plurality of crushed pieces. A crushing step of crushing the crushed pieces into a plurality of pieces to be treated; a drying step of drying the pieces to be treated to a water content of 5 wt% or less while stirring; A dry washing step of applying an impact milling force to the small pieces to separate the resin material and the deposits, a classification step of optionally removing the deposits separated by the dry cleaning step, and sizing the resin material A method for collecting and granulating a waste resin molded article, which comprises at least a sizing step of forming a collected resin material as a raw material. 4. The method according to claim 1, wherein the drying step includes a step of removing attached matter separated from the crushed pieces or the small pieces by stirring and drying the crushed pieces or the small pieces to be processed. Collection and granulation of waste resin molded products. 5. The collection and granulation of a waste resin molded product according to claim 1, wherein the crushed pieces or the small pieces to be treated in the drying step are heated by hot air at 70 to 80 ° C. Method. 6. The waste according to claim 1, wherein the adhering matter containing the recovered resin material after the dry washing step is collected into a collection tank after the recovered resin material is classified through a sieving and sorting step. Method for collecting and granulating resin molded products. . The pipe for sending the deposit 104 including 103 to the collection tank 250 is branched, and the first stage is 1.5 mm, the second stage is 1.0 mm, and the third stage is 0.5 mm.
, And the collected resin material 103 remaining on each of the sieves can be collected in a separately installed collection tank. 7. An apparatus for separating adhering matter from a waste resin molded product and recovering a resin material, wherein a processing target is a waste agricultural film, and a crushing means for crushing the waste agricultural film into a plurality of crushed pieces. A drying chamber into which the crushed pieces are charged; a stirring means for stirring the crushed pieces charged into the drying chamber; a drying means having a heating means for heating the drying chamber; A fixed-side polishing and sizing means on a fixed disk having a central portion communicating with a supply input port of the crushed pieces, and sequentially mounting each fixed pin on a plurality of rotation trajectories; facing the fixed disk; On the movable disk provided so as to be rotatable and driven, the movable side polishing and sizing means in which each movable pin is sequentially implanted on a plurality of rotation trajectories different from each of the fixed pins, and each of the fixed pins Combination with each movable pin Classifying means communicating with the discharge port for discharging the deposits, and removing means for removing the collected resin material having a desired particle size or more to the discharge port, wherein the impact grinding force is applied between the fixed pins and the movable pins. A waste resin molded product recovery / granulation apparatus, comprising: a dry washing / classification / granulation means configured to separate and classify the resin material and the attached matter by using the method, and to size the resin material. . 8. An apparatus for separating adhering matter from a waste resin molded product and recovering a resin material, wherein the processing target is a waste agricultural film, and a crushing means for crushing the waste agricultural film into a plurality of crushed pieces. A drying chamber into which the crushed pieces are charged; a stirring means for stirring the crushed pieces charged into the drying chamber; a drying means having a heating means for heating the drying chamber; A crushing means for crushing the crushed pieces into a plurality of small pieces to be treated, and a plurality of rotations on a fixed disk having a central portion communicating with a supply inlet of the small pieces to be crushed by the crushing means. A fixed-side polishing and sizing means in which each fixed pin is sequentially implanted on the trajectory; and a plurality of different fixed pins different from the fixed pins on a movable disk provided rotatably in opposition to the fixed disk. Movable side laboratory where each movable pin is sequentially implanted on the rotation trajectory・ Sizing means, classifying means at the outer periphery of the combination of each of the fixed pins and the movable pins, and communicating with the discharge port for discharging the separated deposits, and the discharge port for collecting the collected resin material having a desired particle size or more. A dry-cleaning device configured to separate and classify the resin material and the attached matter between the fixed pins and the movable pins by an impact milling force, and to size the resin material. An apparatus for collecting and granulating waste resin molded products, which comprises classification and sizing means. 9. A device for separating adhering matter from a waste resin molded product and recovering a resin material, wherein a processing target is a waste agricultural film, and a crushing means for crushing the waste agricultural film into a plurality of crushed pieces. A crushing unit for crushing the crushed crushed pieces into a plurality of small pieces to be processed; a drying chamber into which the small pieces to be processed formed by the crushing means are charged; A stirring means for stirring the small pieces, a drying means having a heating means for heating the drying chamber, and a fixed disk having a central portion communicating with a supply inlet of the small pieces to be processed dried by the drying means. A fixed-side polishing and sizing means in which each fixed pin is sequentially implanted on a plurality of rotation trajectories; and on a movable disk provided rotatably opposite to the fixed disk, the fixed pins and Sequentially moves each movable pin on multiple different rotation trajectories. Movable side cleaning / granulation means planted, Classification means communicating with the discharge port for discharging separated deposits on the outer peripheral portion of the combination of each fixed pin and each movable pin, and desired particle size or more Taking-out means for taking out the collected resin material to an outlet, separating and classifying the resin material and the attached matter by an impact grinding force between the fixed pins and the movable pins, and sizing the resin material. An apparatus for collecting and granulating a waste resin molded product, comprising: a dry washing, classification and sizing means configured to obtain. 10. The waste resin according to claim 7, wherein a means for removing adhering matter separated from crushed pieces or small pieces to be processed by stirring and drying is provided in a drying chamber of the drying means. Equipment for collecting and granulating molded products. 11. A crushed cellulosic product having an average particle size of 20 mesh or less with a water content within 15 wt%.
% Of this cellulosic crushed product with respect to the water content of 0.1%.
Drying by frictional heat caused by rotation of the stirring impeller to 5 wt% or less, preferably 0.1 wt% or less.
5. A mixture of 25 to 80% by weight of the recovered resin material recovered by the method described in any one of 5), gelling and kneading by frictional heat caused by rotation of the stirring impeller, and cooling and pulverizing to a particle size of 10 mm or less, preferably 5 mm. More preferably, the woody synthetic powder sized to 3 mm or less is heated and kneaded, and the screw is discharged from the extrusion die to the molding die through the introduction portion of the molding die with a screw, and provided at the introduction portion of the molding die. The extruded dough protruded from the guide portion in parallel with the extrusion direction and extruded through a core body extending at least to the slow cooling portion of the molding chamber via the melting portion to form a predetermined thickness and form a hollow portion. A step of gradually cooling the extruded dough extruded into the forming die in the slow cooling section, and increasing the density of the extruded dough by applying a suppressing force against the extruding force to the extruded dough. Method for producing a hollow synthetic wood board in which the fat as a raw material.