JPS5882718A - Extruding method for heat-fused mixture - Google Patents

Abstract

PURPOSE:To obtain an extruding method in which mistures being different in a melting point are fused effectively and even waste can be reused, by a method wherein the mixtures, being heat-fused, are heat-fused in a cycling path to cycle it in succession, and the fused mixtures, whose quantity is less than that of a cyclic movement, are removed out to a working side. CONSTITUTION:Mixtures to be heat-fused are charged into a first extruder 1 through a chute 17. If each of the extruders 1 and 5 is filled with the mixtures which are brought into a molten condition resulting from heating made by a heater, and a cyclic movement is caused at each of the first extruder l and a fourth extruder 4 by passage of it through a cylinder 12, a cycling port 14, a cycling path 15, and a feed port 16. As a result, the mixtures are fused by heating to continuously move it in a cyclic manner, and the fused mixtures, whose quantity is less than that of the cyclic movement, are removed out to a working use side. This permits even materials being different in a melting point to be uniformly molten by the cyclic movement, and enables the reuse of even wastes.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for extruding a mixture of substances that melt when heated.

For example, various resins, coal tar, etc. are used to manufacture carbants.

By the way, when carpet is cut into tiles of a certain size and manufactured into products, a lot of cutting waste is generated, and since it is made of synthetic resin, it is extremely difficult to dispose of it, and it can also become a source of pollution. .

Generally, in the processing of heated melts, products with the same melting point are used to commercialize the products.

However, carpet waste contains polyethylene, coal tar, nylon, polypropylene, acrylic fibers, etc.
Not only do they have different melting points, but they also have solid and fibrous shapes, and even if you try to regenerate them by heating and stirring in a large tank, you will not be able to obtain a uniform melted state.

In addition, if heated at a temperature that matches a substance with a high melting point, the substance with a low melting point will be overheated, resulting in H8 filtration. There is a problem in that it causes a decrease in

In this way, it has been extremely difficult to reuse mixtures with different melting points, such as carpet waste, and it has not been easy to dispose of them, so we are looking forward to the emergence of a method that will enable their reuse. is the current situation.

This invention has been made in view of the above points, and an object of the present invention is to provide an extrusion method that effectively melts mixtures having different melting points and allows them to be reused as carpet lining, etc. It is a purpose.

The structure of the present invention is such that a mixture that is melted by heating is melted by heating and made to flow continuously, and an amount smaller than this flowing amount is taken out to the user side.

Hereinafter, the present invention will be explained based on embodiments shown in the accompanying drawings.

As shown in the figure, the first extruder 1 has a cylinder 12 that houses a screw 11, and is provided with a lower outlet 13 and an upper circulation port 14, and the upper circulation port 14 is connected to a circulation path 15 at the base of the cylinder 12. It is connected to a supply port 16 provided in the.

The supply port 16 is provided with an input chute 17 at the top, the screw 11 is driven by a motor (not shown), and the cylinder 12, circulation path 15, supply port 16, etc. are covered with a band heater or heater wire 16. , the mixture inside can be heated and melted.

In the case shown, the first extruder 1 is followed by the second extruder 2, the third extruder
The extruder 3, the fourth extruder 4, and the fifth extruder 5 are arranged in succession, and the second to fourth extruders of the fifth extruder 5 have the same structure as the first extruder 1, The extrusion direction by the screw 12 is sequentially reversed so that each supply port 16 communicates with the take-out port 13 of the extruder located above.

In the fifth extruder 5, all the tips of the cylinders 12 are at the outlet 1.
3' and is connected to the forming mechanism 6 to extrude the amount of molten mixture required for use.

The first to fourth extruders extrude the mixture sent from the supply port 16 forward with the screw 11, and send most of the molten mixture from the circulation port 14 through the circulation path 15 to the supply port 16.
At the same time, a part of the molten mixture is taken out from the outlet 13 via the lower extruder as the amount required for the molding mechanism 6.

The first to fourth extruders have a screw 1 in the upper extruder.
The rotation speed of the fifth extruder 5 is set to be slow.
The rotational speed of the extruder 74 is set so as to complete the extrusion 74 necessary for molding.

By the way, the inner diameter of the cylinder 12 in each extruder is 10
In the case of 0■, the screw of the fifth extruder 5 is driven at a speed of 5 revolutions per minute.

On the other hand, the screw 11 of the fourth extruder 4 has an amount of 51i! taken out to the fifth extruder 5! It is driven at a speed of 55 revolutions per minute, which is one rotation plus 50 revolutions required for mixing.

The screw 11 of the third extruder 3 is driven at 45 revolutions per minute to prevent the molten mixture from flowing back into the circulation path 15 of the fourth extruder 4 at the outlet 13.

In this way, the second extruder 2 is decelerated to 35 times per minute, the first extruder 1 is decelerated to 25 times per minute, and the upper extruder slows down the circulation speed to prevent backflow in each extruder. is prevented.

The molding mechanism 6 is exemplified as one that molds the molten mixture extruded from the fifth extruder 5 into a strip-shaped sheet.
A disperser 8 equipped with a conical cone 7 is attached to the tip outlet 13' of the extruder 5 to disperse the molten mixture in a cylindrical shape, and a pipe 9 connected around the circular lower end of the disperser 8 is connected to the flat nozzle 10. The nozzles 10 are connected in a distributed manner to form a sheet.

In this way, by using the disperser 8 and the group of pipes 9, the supply pressure of the molten mixture to the flat nozzle 10 is made constant in the width direction, and a belt-shaped sheet with a uniform thickness can be obtained.

Note that the number of extruders used is not limited to that shown in the drawings, and can be freely increased or decreased as required, and the number of extruders used can be either single or double.

This invention has the above-mentioned structure, and the extrusion method will be explained next.

Various wastes that are melted by heating are fed into the first extruder 1 through the chute 17. At this time, plastic or fiber waste is cut and crushed in advance.

When each of the extruders 1 to 5 is filled with the mixture, the mixture becomes molten by heating by the heater, and the first extruder 1
In each of the four extruders 4 to 4, a cylinder 12. Circulating motion occurs through the circulation port 14, circulation path 15, and supply port 16.

Due to this circulation movement, the mixture is mixed and stirred at the same time as it is heated and melted, and the gas generated by the melting is sequentially extracted from the upper extruder at the supply port 16, and the gas is transferred to the fifth extruder 5. A molten mixture free of contamination will be provided.

The fifth extruder 5 has a forming mechanism 6 which continuously extrudes this amount of the molten mixture to form a sheet.Each of the first to fourth extruders is used in the fifth extruder 5. The amount of mixture used in the first extruder 1 is then taken out to the lower extruder, and it is only necessary to replenish the amount of new mixture used in the first extruder 1, and the strength of the sheet is greatly increased by the randomly mixed fibers. improves.

As described above, according to the present invention, the molten material is melted by heating and continuously circulated, and a smaller amount of the molten mixture than in the circulating movement is taken out to the use side.
Substances with different melting points can be uniformly melted by the circulating motion, and since mixing and agitation can be performed by the circulating motion, it becomes possible to reuse waste materials such as carpet cuttings.

In addition, melting, mixing, and stirring of the molten mixture can be performed without installing check valves or regulating valves inside the passage, and the molten mixture moves smoothly and there are no parts where it is difficult to melt, so there is no problem when starting work. This makes it possible to shorten the heating time.

Furthermore, the circulating motion automatically removes steam and gas, which has the effect of preventing the formation of bubbles in the product. .

[Brief explanation of the drawing]

The drawing is a partially cutaway front view of an extrusion device used in the extrusion method of the present invention.・ 1.2.3.4.5 is an extruder, 6 is a molding mechanism, 11 is a screw, 12 is a cylinder, 13 is an outlet, 14 is a circulation port, 15 is a circulation path, 16 is a supply port, 18 is a heater , Patent applicant Yoshihiko Tadami

Claims (1)

[Claims] A method for extruding a heated molten mixture, characterized in that a mixture that is melted by heating is heated and melted in a circulation path and continuously circulated, and a smaller amount of the molten mixture than in the circulating movement is taken out to the user side.