JPH08281644A - Fluff processing method - Google Patents

Abstract

PURPOSE: To provide a fluff processing method which improves a volume reduction rate when fluff is transported and stored. CONSTITUTION: In a synthetic resin regeneration processing method, fluff F obtained by grinding through a cutting process, the first grinding process, and the second grinding process, after passing through a special washing process, is fed to a press molding machine 11 in a press process. The fluff is extruded toward an outlet 18 by a press plate 23 interlocked with the rod 21 of a hydraulic cylinder 20. The extruded fluff F, while being resisted by a tapered discharge pipe 17, is squeezed to remove water into a cubic form and discharged from the outlet 18. Through the above process, the volume reduction rate of the fluff F increases, improving the efficiency of a synthetic resin regeneration process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing fluff, and more specifically, it pulverizes a synthetic resin thin material that is an industrial waste such as a used film of an agricultural greenhouse. The present invention relates to a method for processing a fluff obtained as a result.

[0002]

2. Description of the Related Art Conventionally, films made of synthetic resins such as polyethylene, polyvinyl chloride, and polyvinyl acetate have been used as films for agricultural greenhouses.
When the film was used for a long period of time, it became dirty and broke, so it was necessary to replace the film with a new film at regular intervals. The used film peeled off at that time is mainly recycled as a raw material for floor tiles.

Here, as the reprocessing process, a method comprising the steps shown in FIG. 1B is conventionally known. That is, in the cutting step 41, the used film peeled from the vinyl house is cut into a predetermined size, and then in the primary crushing step 42, the cut film is crushed into cut pieces. Next, in the secondary crushing step 43, the cut pieces are crushed into small pieces and washed. The cut pieces or small pieces obtained by the crushing in each of the crushing steps 42 and 43 are called fluff.

Further, in the special cleaning step 44, the fluff is subjected to special cleaning, and then, in the dehydration step 45, a predetermined amount of the fluff is put into a rotary dehydration tank to squeeze water. Then, when the one dehydration step 45 is completed, the fluff of a predetermined amount whose water content has been squeezed is taken out from the dehydration tank and put into the dryer in the next step. Next, in the drying step 46, a predetermined amount of fluff whose water content has been squeezed is put into a dryer and further dried by a heater or the like, and is taken out from the dryer every time one drying step 46 is completed. Then, in the transfer process 47, the fluff taken out from the dryer is loaded on the transfer vehicle and transferred to the next process, the rush process 48. Or, it is taken out from the dryer and stored in the storage place. Then, in the crushing step 48, the conveyed fluff is further cut by melting due to frictional heat with the plurality of rotary blades of the crusher mixer, and is solidified again to form granular chips. The granular chips are used as a raw material for floor tiles.

[0005]

However, in the above-mentioned conventional reprocessing processing, there is a problem that the transportation efficiency is poor when the fluff is dehydrated and dried and then transported to the crushing step 48. That is, the fluff that has undergone the drying process 46 is light in weight, but since the volume per unit weight is large, the amount of fluff that can be loaded on the transport vehicle at one time is small. Also,
Even when the fluff is stored, there is a problem that the storage space is wide. Further, in the drying step 46, since the fluff is dried by using the heater having a large heat capacity, there is a problem that the energy cost increases. Further, a dehydration step 45 and a drying step 46
In the above, there is a problem that the work is complicated and the production cost is increased because the work of loading and unloading the fluff to and from the dehydration tank and the dryer is repeated for each predetermined amount.

The present invention is intended to solve the above-mentioned problems, and a first object thereof is to improve the volume reduction efficiency of the fluff during transportation. The second purpose is to reduce the energy cost required for fluff processing. The third purpose is to improve the efficiency of fluff processing.

[0007]

In order to achieve the above object, according to the invention described in claim 1, a thin material made of a synthetic resin is crushed and washed into a large number of wet small pieces, and then a large number of them are formed. The wet small pieces were collected and pressed into a predetermined block shape.

According to the second aspect of the present invention, the wet small pieces are press-molded into a lump while the water content is squeezed by a press-molding machine in an integrated state. In the invention according to claim 3, the press molding machine is
A wet chamber small piece, a press chamber for pressing the accumulated wet small pieces into a block, and an outlet for discharging the block wet formed small pieces. I was supposed to.

[0009]

According to the first aspect of the present invention, a large number of wet small pieces are formed by crushing and washing a thin material made of synthetic resin, and then the many wet small pieces are pressed into a predetermined block. Molded.

According to a second aspect of the present invention, the first aspect
In addition to the effect of the invention described in 1., press molding is performed using a press molding machine. According to the invention of claim 3, in addition to the function of the invention of claim 2, a large number of wet small pieces are press-molded into a predetermined block by a press molding machine and then discharged from the discharge port.

[0011]

【Example】

(First Example) A first example in which the present invention is embodied as a method for reprocessing a used film in an agricultural greenhouse.
An embodiment will be described with reference to FIGS.

The recycling processing method in this embodiment is carried out through the steps shown in FIG. As shown in FIG. 1A, first, in the cutting step 1, the film peeled from the vinyl house is cut into a size that can be easily processed by a hydraulic cutting machine (not shown). Next, the primary crushing step 2
Then, the cut film is put into a first crusher (not shown), and the rotary blade of the machine cuts the film into a large number of cut pieces. In the subsequent secondary crushing step 3, the cut pieces are put into a second crusher (not shown), and the cut pieces are crushed into thin pieces of about 1 cm square by a rotary blade of the same machine.
In the present embodiment, this thin piece will be referred to as a fluff F hereinafter. Further, in this secondary crushing step 3, cleaning water is flowed into the second crusher to perform crushing and cleaning at the same time. Therefore, the fluff F is taken out of the second pulverizer in a wet state.

In the special washing step 4, a special washing tank (not shown) is used to further wash the fluff F with a special washing liquid and water. The above steps are conventionally performed, and the machines and configurations used in the above steps are conventionally well known. Therefore, detailed description thereof will be omitted.

Next, the pressing step 5 will be described. First, the press molding machine will be described. As shown in FIG. 2, the main body case 12 of the press molding machine 11 is formed in a tubular shape, and a press chamber 13 is formed inside the main body case 12. Further, the opening 1 is provided at the rear of the upper wall of the main body case 12.
4 is provided, and the charging pipe 1 is provided so as to communicate with the opening 14.
5 is erected so as to spread upward. A charging port 16 for charging the fluff F into the press chamber 13 is provided at the upper end of the charging pipe 15.
On the other hand, a taper-shaped discharge pipe 17 is attached to the front end of the main body case 12 to give resistance to the fluff F to be discharged. At the tip of the discharge pipe 17, a cubic-shaped discharge port 18 is provided. A lid 19 for sealing the press chamber 13 is provided at the rear end of the main body case 12, and a hydraulic cylinder 20 is provided so as to penetrate the lid 19.

The rod 21 of the hydraulic cylinder 20 is connected to a press plate 23 via a connecting plate 22, and the press plate 23 moves back and forth inside the press chamber 13 toward the discharge port 18 as the rod 21 expands and contracts. It is provided to slide as much as possible. In addition, in the front part of the lower wall of the main body case 12,
A large number of drainage holes 24 are provided.

Next, the pressing process using the press molding machine 11 will be described in detail. First, the fluff that has gone through the special cleaning step 4 is introduced into the press chamber 13 through the inlet 16 in predetermined amounts. At this time, the press plate 23 has the opening 1
It is arranged at an initial position rearward of the rear end of the No. 4. When the operator turns on a switch (not shown), the hydraulic cylinder 20 operates and the rod 21 extends. Then, the fluff F accumulated in the press chamber 13 is pushed out toward the discharge port 18 by the press plate 23, and press-formed while receiving resistance by the tapered discharge pipe 17. After a lapse of a predetermined time, the pressing plate 23 returns to the initial position due to the contraction of the rod 21. Then, the next predetermined amount of fluff F is charged. By repeating the above-described operation, the wet fluff F accumulated in the press chamber 13 is squeezed to have a cubic shape and is intermittently discharged from the discharge port 18. Then, the fluff F, which has been squeezed with water and pressed into a cubic shape,
In the carrying step 6, the vehicle is loaded on the carrying vehicle and carried to a storage location, or the same rush step 7 as in the prior art.
Sent to.

As described above, in this embodiment, when the fluff F is loaded on the transport vehicle in the transport step 6, a large amount of fluff F can be loaded at one time, and it is not necessary to take a large space in the storage place. That is, the volume reduction efficiency of the fluff F can be improved. The discharged water content of the fluff F can be reduced to 30% before the press molding, and it is not necessary to dehydrate and dry the fluff F, and the processing efficiency of the fluff F can be improved. Further, since a heater for drying the fluff F is not used, energy cost can be reduced.

[0018]

[Second Embodiment] Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, only the model of the press molding machine used in the pressing step 5 is different from the first embodiment.

As shown in FIG. 3, the main body case 26 of the press molding machine 25 is in the shape of a rectangular cylinder whose both ends are sealed, and a press chamber 27 is provided inside. The body case 2
An opening 28 is opened in the upper part of the side wall of the main body case 2
An outlet 29 is provided in the lower portion of the side wall of 6. A hinge 30 is provided above the take-out port 29, and a door 31 is attached and supported via the hinge 30 so as to be able to open and close the take-out port 29. A hydraulic cylinder 32 is provided on the upper wall of the main body case 26 so as to penetrate the upper wall, and a rod 33 of the hydraulic cylinder 32 is connected to the press plate 3 via a connecting plate 34.
It is connected to 5. The press plate 35 is provided so as to slide vertically inside the press chamber 27 toward the lower wall as the rod 33 expands and contracts. Further, a large number of water drain holes 36 are provided on the lower wall of the main body case 26.

Next, the pressing step 5 using the above press forming machine 15 will be described in detail. First, the fluff F that has undergone the special cleaning step 4 is introduced into the press chamber 27 through the inlet 28 in predetermined amounts. At this time, the press plate 35 is arranged at the initial position above the upper end of the charging port 28.
When the operator turns on a switch (not shown), the hydraulic cylinder 32 operates and the rod 33 extends. Then
The fluff F accumulated in the press chamber 27 is pressed downward by the press plate 35 and is press-formed in the cubic press chamber 27. After a lapse of a predetermined time, the press plate 35 returns to the initial position due to the contraction of the rod 33. Then, the operator opens the take-out port 29 to take out all of the fractures F that have been squeezed and pressed into a cubic shape. Then, the next predetermined amount of fractal F is introduced. Next, the fluff F is sent to the carrying step 6 and the crushing step 7 as in the first embodiment.

As described above, in this embodiment, when the fluff F is loaded on the transport vehicle in the transport step 6, a large amount of fluff F can be loaded at one time, and it is not necessary to have a large storage space. That is, the volume reduction efficiency can be improved as in the first embodiment. Since the inside of the press chamber 27 is closed by the press plate 35 and the door 31 during press molding, the moisture content of the discharged fluff F can be reduced to 10% before the press molding. Therefore, it is not necessary to dehydrate and dry the fluff F, and the processing efficiency of the fluff F can be improved as in the first embodiment. Further, since the heater for drying the fluff F is not used, the energy cost can be reduced as in the first embodiment.

The present invention may be embodied as follows. (1) In the first and second embodiments, the shape of the fluff F press-molded by the press molding machines 1 and 15 in the pressing step 5 is a cubic shape.
The shape can be changed as long as it can be stacked.

Even in this case, the volume reduction efficiency of the fluff F can be improved as in the first and second embodiments. (2) In the first and second embodiments, the processing method of the fluff is embodied by the film of the greenhouse for agriculture, but the container of the plastic bottle for drinking water which is also made of the synthetic resin or the synthetic resin tent sheet. It may be used for a method of recycling and processing industrial waste such as.

(3) In the first embodiment, a belt conveyor may be connected to each of the inlet 16 and the outlet 18 of the press molding machine 11. With this configuration, the working efficiency of the fluff F processing is further improved.

(4) In the first and second embodiments, the hydraulic cylinders 20 and 32 are used for the press molding machines 11 and 25, but
You may change to an air cylinder. Even with this structure, the same pressing effect as that of the first and second embodiments can be obtained.

Next, technical ideas other than the claims grasped by each of the embodiments will be described below together with their effects. (1) The wet small piece is press-formed into a lump by a press-forming machine having a heating / drying device.
The processing method for fluff described in.

With such a structure, it is possible to surely squeeze out water from the fluff.

[0028]

As described above in detail, in the invention described in claim 1, the volume reduction efficiency at the time of carrying and storing the fluff can be improved.

According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, since the drying step can be omitted,
Energy costs can be reduced. Claim 3
According to the invention described in (1), in addition to the effect of the invention described in (2), the working efficiency of the fluff can be surely improved.

[Brief description of drawings]

FIG. 1A is a process diagram showing a processing method of the present invention,
FIG. 6B is a process diagram showing a conventional processing method.

FIG. 2 is a sectional view of the press molding machine according to the first embodiment of the present invention.

FIG. 3 is a sectional view of a press molding machine according to a second embodiment of the present invention.

[Explanation of symbols]

Press molding machine ... 15,25, input port ... 16,28, press chamber ... 13,27, discharge port ... 18, outlet ... 31, fluff ... F.

Claims (3)

[Claims] 1. A method for processing a fluff, which comprises crushing and washing a thin material made of a synthetic resin into a large number of wet small pieces, and then accumulating the large number of wet small pieces into a predetermined block. 2. The fluff processing method according to claim 1, wherein the wet small pieces are press-molded into a lump while the water content is being squeezed by a press molding machine in an accumulated state. 3. The press molding machine includes an input port into which the wet small pieces are charged, and an outlet from which the wet small particles, which have been pressed and accumulated and are pressed into a block, are discharged. The fluff processing method according to claim 2.