JPH03118883A - Method and device for preventing deposition of fiber waste in production of recycle product by separative crushing of plastic base material laminated with nonwoven fabric - Google Patents

Abstract

PURPOSE:To prevent the clogging of a passage by laminating a deposition preventing body made of a specified material on a collision member arranged at a flowing path. CONSTITUTION:The fine resin pieces and fiber waste fed to an upper vessel 21 of a separator 2 under pressure are allowed to collide with the collision member 24 and blocked, the fine resin pieces P1 are dropped, the light fiber waste P2 suspended in the vessel by the flow velocity tends to be brought into contact with the inner surface of the upper vessel 21, however the waste is repelled by the deposition preventive body 20 and lowered. A lifting action is produced by the centrifugal separator 221 in the lower vessel 22, hence the light fiber waste is discharged from an outlet 251, and the heavy fiber waste is discharged from the outlet 25 of a contracted pipe 23. Consequently, the deposition of the fiber waste is eliminated, and productivity is remarkably improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method and apparatus for preventing the accumulation of fiber waste in the manufacturing process of recycled products by crushing and separating a synthetic resin base material on which nonwoven fabric is laminated. be. Then, after the synthetic resin base material is molded, a product is obtained through a punching process, and the synthetic resin base material that remains after punching becomes a waste base material, but when reusing this waste base material, the above-mentioned In the process of pulverizing the waste material and separating and sieving the mixed resin particles and non-woven fabric fiber waste after pulverization, the non-woven fabric fiber waste separated from the resin particles accumulates and blocks the flow path. The purpose is to prevent problems in the manufacturing of products.

[Conventional technology]

For example, in interior parts such as automobile floor mats or trunk linings, molded products whose surfaces are covered with non-woven fabric have become popular to avoid exposing the plastic parts to the surfaces. For this reason, during the molding process, a synthetic resin base material that is considerably larger than the product is used to punch out the product, so the amount of unnecessary waste base material removed from the product is equivalent to the amount used in the product. ing. Therefore, in order to obtain recycled products from the waste base material, it has become absolutely necessary to recover the waste base material.

Incidentally, injection products in which nonwoven fabric is directly stretched manually have existed for some time.

However, as the technology for collecting waste base materials for reuse after removing non-woven fabric products has not yet been developed, we are using materials that do not require the collection of waste base materials for reuse. Waste base materials were disposed of as scrap.

[Problem to be solved by the invention]

Incidentally, although existing equipment exists to recover waste materials from synthetic resin products covered with nonwoven fabric punched out by molding, it is a combination of equipment with individual functions. However, dead spaces inevitably occur in the device due to the flow of air when transporting fluid using compressed air. Then, in combination with the high speed and high temperature, fiber waste from the nonwoven fabric that has been crushed and separated from the synthetic resin base material in the form of thin threads, fluff, or fluff adheres to that area in a sticky manner and turns into a matte state in a relatively short period of time. The particles accumulate, which obstructs the flow of the flow path and eventually causes the flow path to become clogged.

Therefore, in order to prevent the flow path from clogging, it is necessary for workers to constantly patrol and manually remove accumulated fiber debris from the nonwoven fabric.

[Means for Solving the Problems] Therefore, the present invention is provided in order to solve the conventional problems and achieve the object of the invention.

That is, the first aspect of the present invention is a method for preventing the accumulation of fiber waste in the manufacturing process of a recycled product by crushing and separating a synthetic resin base material on which a nonwoven fabric is laminated. The waste is pressure-fed to a separator at high speed, and in the tank of the separator, an anti-adhesion body made of a sheet or film made of polypropylene or a similar material is placed on the inner surface of the tank and the collision member arranged in the flow path in the tank. The gist is that by laminating, when the fiber waste of the nonwoven fabric force-fed into the tank comes into contact with the collision member or the inner surface of the tank, adhesion of the fiber waste is almost eliminated.

The second aspect of the present invention is a device for preventing the accumulation of fiber waste in the manufacturing process of recycled products by crushing and separating a synthetic resin base material on which a nonwoven fabric is laminated. a separation tank for introducing pulverized and mixed resin pieces and fiber waste and separating them into the resin pieces and fiber waste, and the separator is provided with an upper tank and a lower tank,
The upper and lower tanks are connected through a narrow channel, and a collision member is placed in the channel of the upper tank, and a sheet or film made of polypropylene or a similar material is placed on the surface of the collision member and the inner surface of the upper tank. It is equipped with an anti-adhesion body consisting of.

A third aspect of the present invention is a device for preventing the accumulation of fiber waste in the manufacturing process of recycled products by crushing and separating the synthetic resin base material on which the nonwoven fabric according to the second aspect of the present invention is laminated. It is equipped with a vibrating sieve machine that discharges the resin particles from the lower tank and introduces them, and a sheet of polypropylene or a material similar thereto or It is equipped with an anti-adhesion body made of film.

[For production]

The effects based on the above means are as follows. That is,
The synthetic resin base material on which the nonwoven fabric is welded and laminated during the molding of the synthetic resin plate is fed into a crusher.

Here, the above-mentioned waste base material is crushed into pieces and mixed with resin pieces and fiber waste of the non-woven fabric, and the resin pieces and fiber waste are mixed with the first blower and heated at a certain high speed and high temperature. Force feed to separator.

Then, when the resin pieces and fiber waste that have been pressure-fed into the upper tank of the separator hit a collision member and stop flowing, the resin pieces fall as they are under their own weight. In addition, when fiber debris collides with a colliding member, the material and the high-temperature, high-speed flow cause it to stick and adhere, but the adhesion prevention body of the colliding member separates it from the colliding member, forming fine thread-like particles. The lightweight waste fibers become suspended and are discharged from the outlet by the operation of the centrifuge in the lower tank. On the other hand, heavy fibrous debris such as fluff and fluff descends and comes into contact with the inner surface of the tank. At this time as well, the fiber waste adheres to the inner surface of the tank, but is separated by the adhesion prevention member and further descends.

The falling resin pieces and heavy fiber waste enter the lower tank, but the operation of the centrifugal separator in the lower tank causes the fiber waste to rise and is discharged from the outlet of the narrow constricted channel.

Note that the resin pieces will fall as they are.

Next, the fallen resin pieces are temporarily stored in a storage tank equipped with a quantitative supply mechanism. Further, the resin is fed under pressure to the resin strip storage cyclone via the quantitative supply mechanism of the storage tank and the second blower.

In the cyclone, the fiber waste of the nonwoven fabric is centrifuged to drop the resin pieces, and the remaining fiber waste still mixed with the resin pieces is sent to the pack filter, and the air that has filtered the fiber waste is released to the outside. Ru.

Then, the resin pieces falling from the lower discharge port of the cyclone are fed into the extruder of the granulation mechanism. Here, the linear body extruded into an elongated shape is sent to a cutting machine through a cooling water tank and cut into a predetermined size to become a granular product for reuse.

On the other hand, in the above-mentioned separator, the fiber waste discharged from the upper tank and the outlet of the constricted flow path pipe is forced into the fiber waste storage cyclone by the third blower, where it collects fluff, fluff, and other waste. Heavy fiber waste falls downward and is sent out to the outside, while light and floating fiber waste rises and is sent from the upper discharge port to the next fiber waste pack filter, where fine fiber waste is stored. Filtered air is released to the outside.

〔Example〕 Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 is a schematic diagram showing the process of crushing and separating the synthetic resin base material on which nonwoven fabric is laminated, Figure 2 is an enlarged perspective view of the upper tank of the separator in the process of Figure 1, and Figure 3 is the synthetic resin base material laminated with nonwoven fabric. FIG. 4 is a perspective view showing resin strips, and FIG. 5 is a perspective view showing fiber waste.

In the figure, reference numeral 1 denotes a crusher, and an input port 1 for synthetic resin base material is provided at the top of the tank. is installed, and a filter 1 is installed at the outlet at the bottom of the tank! is equipped. Then, the synthetic resin base material P, in which the nonwoven fabric pt'' was laminated by welding during the molding of the synthetic resin vXp+', is charged into the above-mentioned crusher.

2 is a separator for separating the crushed synthetic resin base material P into resin pieces PI and nonwoven fabric waste PR, and the upper tank 21 and the lower tank 22 are connected through a narrow flow pipe 23. ing. A collision member 24 is placed in the flow path in the upper half of the upper tank.
is located. The means for arranging the collision member is such that both left and right ends thereof are fixed to the inner surface of the upper tank by welding or the like. The lower tank 22 has a centrifugal separator 22. is provided.

Further, the upper tank 21 and the narrow flow pipe 23 each have a discharge port 25.・258 is provided.

Reference numeral 3 denotes a vibrating sieve machine installed directly below the lower tank 22 of the separator, and a sieve plate 3 that slopes downwardly from the lower tank side toward the front.
1, and a bottom portion 32 below the sieve plate. The vibrating sieve machine has the function of sieving the resin particles PI and fiber waste P2 that have fallen from the separation machine 2, as well as sieving out foreign substances and extremely irregularly shaped substances and sending them to the next storage tank. Fulfill.

4 is a resin strip P fed from the vibrating sieve machine 3.

This is a storage tank for storing a certain amount of water and then supplying it in a fixed amount.

5 is a metering mechanism for supplying the resin strips from the storage tank; 4. A cyclone containing resin pieces that feeds in a fixed amount at 6
shows the granulation mechanism, which includes an extrusion 417 which is a granulation process for processing the resin pieces from the cyclone 5 into granular products, a cooling water tank 8 that cools the linear body, and a cooling water tank 8 that turns the cooled linear body into granules. It consists of a cut [9].

10 is a crude fiber layer storage tank with a cyclone structure into which the fiber waste P2 discharged from the upper tank 21 of the separator and the outlet 25+/258 of the flow pipe 23 is introduced under pressure, 11 is from the storage tank, This is a pack filter that introduces and contains light fiber waste.

12 is a pack filter that communicates with the resin debris storage cyclone 5; 13 to 15 are for pressure feeding from the crusher 1 to the separator 2, from the storage tank 4 to the cyclone 5, and from the separator 2 to the fiber waste storage tank 10. A blower is shown.

20 is made of polypropylene or a similar material;
The anti-adhesion body has a smooth surface and is laminated by pasting, overlapping, or coating on at least the inner surface of the upper tank 21 of the separator 2 and the surface of the collision member 240. The above-mentioned adhesion prevention body is also provided at the part where the resin particles fall on the sieve plate 31 of the vibrating sieve machine 3 and at the bottom 32 below the sieve plate.

[Specific process example]

First, the synthetic resin base material P, in which the nonwoven fabric pi'' is laminated on the thin synthetic resin plates p and l, is introduced into the crusher 1 through the inlet 11.Then, the fine resin pieces are finely crushed by the crusher. The PI and nonwoven fabric waste P2 are discharged from the discharge port 1□ and are forced into the separator 2 in a mixed state by the air blower [13] at a considerably high speed.

Next, the resin particles and fiber waste that have been pressure-fed to the upper tank 21 of the separator 2 collide with the collision member 24 and stop flowing, the resin particles P+ fall, and the lighter fiber waste P2 has a lower flow rate. The fluff or fluff floating in the tank and relatively heavy tends to come into contact with the inner surface of the upper tank 21 while descending, but is separated by the anti-adhesion body 20 and descends. Then, by causing an upward movement by the centrifuge 22□ in the lower tank 22, light fiber waste is removed from the discharge port 25 in the upper tank. The relatively heavy fiber waste is discharged from the closed flow pipe 2.
3 outlet 25. discharge from.

Therefore, in the separator 2, the resin particles P and the fiber waste P2, which have been mixed together, are separated.

At this time, the fiber debris collides with the collision member 24 or comes into contact with the inner surface of the upper tank due to the flow velocity, causing the fiber debris to stick to itself due to the high temperature and high speed. Also, since the anti-adhesion body 20 is laminated on the surface of the collision member 24 and the inner surface of the tank, it floats or descends without adhering.

Out of the fiber waste of the nonwoven fabric, the discharge port 2 of the upper tank 21
5. and the outlet 25 of the lower tank 22! Each fiber waste P2 discharged from the fiber waste storage tank 10 is force-fed by a blower 15 to a fiber waste storage tank 10 having a cyclone structure.

Next, the resin pieces PI that have fallen from the lower tank 22 are sent to the sieve machine 3 directly below the lower tank, where they are further divided into resin pieces,
Large lumps of fiber waste that could not be discharged from the discharge port of the separation tank are separated by an inclined sieve 31. That is, the resin particles pass through the mesh of the sieve and fall, and the fiber waste mass slides down along the slanted surface of the sieve toward the front and is discharged to the outside. In this case, among the fiber waste, thin and short ones fall through the mesh of the sieve together with the resin particles, but the presence of this amount of fiber waste has no effect.

Also in the vibrating sieve machine, by providing the adhesion prevention body 20 on the sieve plate 31 where the resin pieces fall and on the lower bottom part 32 of the sieve plate, residual fiber debris mixed in the resin pieces can be removed. The amount of water that is supplied to the next storage tank 4 without being deposited is then delivered to the cyclone 5 in predetermined amounts from the quantitative supply mechanism 4I of the storage tank and is pumped. Then, the cyclone 5 further separates the remaining fiber waste mixed with the resin pieces, sends the remaining fiber waste to the pack filter 12, and the resin pieces P are sent to the granulation mechanism 6 under normal pressure. It can be sent in good condition. That is, a long wire is extruded at high temperature in an extruder 7, cooled by passing through a cooling water tank 8, and then sent to a cutting machine 9 and cut into extremely short lengths to form a granular product P'. .

〔Effect of the invention〕

Since the present invention has the above-mentioned configuration, when a product is removed from a synthetic resin base material in which a nonwoven fabric is laminated on a synthetic resin board and the waste base material left behind is fed into a crusher, resin pieces and fiber waste are mixed. It is ground into fine pieces. Next, the resin pieces and fiber waste are separated into resin pieces and fiber waste by a separator, and the resin pieces are sorted by a vibrating sieve to determine the size of the resin pieces and residual fiber waste is removed. After the pieces have passed through a cyclone, they can be passed through a granulation mechanism to form the resin pieces into granules to obtain recycled products.

In addition, even if fiber waste comes into contact with the inner surface of the upper tank of the separator and the collision member placed in the flow path in the upper tank during the process from the crusher to the granulation mechanism, the parts that the fiber waste comes into contact with By laminating an anti-adhesive body on the top, the fibers are separated with almost no adhesion, and the continued adhesion of the fibers prevents them from being deposited (as a result, the accumulated fibers fall under their own weight and fall into the lower tank. It is also possible to reliably remove obstacles that block the communicating wave path.

In addition, by providing the above-mentioned adhesion prevention body on the sieve plate of the vibrating sieve machine and the bottom surface below the sieve plate, it is possible to prevent fiber waste from adhering and accumulating in that area, and the sieve mesh will not be clogged. In the crushing and separation system for synthetic resin base materials in which this type of non-woven fabric is laminated, there is no need to stop the operation due to flow path blockage due to fiber waste of the non-woven fabric, and productivity is greatly improved. The present invention is novel and useful as a method and apparatus for preventing the accumulation of fiber waste in the process of crushing and separating synthetic resin base materials.

[Brief explanation of drawings]

Figure 1 is a schematic diagram showing the crushing and separation process of a synthetic resin base material on which nonwoven fabric is laminated, Figure 2 is an enlarged perspective view of the upper tank of the separator during the process of Figure 1, and Figure 3 is a synthetic resin FIG. 4 is a perspective view of a part of the base material, FIG. 4 is a perspective view showing resin strips and fiber waste, and FIG. 5 is a perspective view showing fiber waste. 1... Pulverizer 2... Minute m1II 3... Vibrating sieve machine 4... Storage tank for resin pieces 5... Cyclone 6 ... Granulation mechanism 7 ... Extruder 8 ... Cooling water tank 9 ... Linear body cutting machine 10 ... Crude fiber waste storage Tank 11...Fiber waste pack filter 12...
・Pack filters 13 to 15 for resin pieces...
Blower 20...Adhesion prevention body 21...Upper tank 22 of separator...Lower tank 23 of minute M machine...Communicates upper tank and lower tank flow path pipe 24
...Collision member P...Synthetic resin thin leather material P, ...Resin strip P! ...Fiber waste P' ...Recycled product

Claims (3)

[Claims] (1) The resin fragments and nonwoven fabric waste that have been crushed and mixed by a crusher are fed under pressure to a separator at high speed, and in the tank of the separator, the collision members placed on the inner surface of the tank and the flow path in the tank By laminating an anti-adhesion body made of a sheet or film made of polypropylene or a similar material, it is possible to prevent the adhesion of non-woven fabric fibers fed into the tank when they come into contact with the collision member or the inner surface of the tank. A method for preventing the accumulation of fiber waste in the manufacturing process of recycled products by crushing and separating a synthetic resin base material on which nonwoven fabrics are laminated, characterized by almost eliminating the accumulation of fiber waste. (2) Consisting of a pulverizer that pulverizes the synthetic resin base material, and a separation tank that introduces the resin pieces and fiber waste crushed and mixed by the pulverizer and separates the resin pieces and fiber waste, and the separation tank The machine is provided with an upper tank and a lower tank, the upper and lower tanks are connected by a narrow flow pipe, and a collision member is arranged in the flow passage of the upper tank, and the surface of the collision member and the inner surface of the upper tank are A device for preventing the accumulation of fiber waste in the manufacturing process of recycled products by crushing and separating a synthetic resin base material laminated with a nonwoven fabric, characterized in that an anti-adhesion body made of a sheet or film made of polypropylene or a material similar thereto is provided on the base material. . (3) It is equipped with a vibrating sieve machine that discharges and introduces the resin pieces separated by the separator from the lower tank, and the resin pieces are discharged from the sieve plate in the vibrating sieve machine and on the bottom surface below the sieve plate. Preventing the accumulation of fiber waste in the manufacturing process of recycled products by crushing and separating a synthetic resin base material laminated with the nonwoven fabric according to claim (2), which is provided with an adhesion prevention body made of a sheet or film made of polypropylene or a material similar thereto. Device.