JP2000079661A - Profile molded product, method and apparatus for molding the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the appearance of a profile molded product by coating the outer peripheral surface of the profile molded product being a regenerated product of waste with a synthetic resin layer and to effectively utilize the waste. SOLUTION: In order to mold a profile molded product, waste and a synthetic resin are charged in first and second extruders 20, 24 to be kneaded and melted. Subsequently, molten waste and a synthetic resin are temporarily stored in first and second accumulator type injection machines 22, 25 in the quantities corresponding to vol. of the molded product and the plungers of the injection machines 22, 25 are allowed to advance to inject the molten waste and the synthetic resin into the first and second flow channels 26, 27 of a profile molding die head 21a and a profile molded product A of which the outer surface 10 is coated with the surface layer comprising the synthetic resin is extruded from the profile molding die 21 communicating with an emitting orifice 23a to be molded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an irregularly shaped article, a method of molding the same, and an apparatus therefor.

[0002]

2. Description of the Related Art Due to the recent depletion of global resources, it is presently desired to recycle various raw materials and products including waste plastics. Waste plastics can be used in oil-based technologies, those converted to iron blast furnace reducing agents, PE
They are re-chipped like T bottles and reprocessed into fibers and the like. However, in each case, waste plastics are separated from wastes including paper and metal, chips are stored, and they are stored and then blown into blast furnaces or oiled depending on the production mode. It tends to generate unusable waste.

[0003]

SUMMARY OF THE INVENTION The present invention does not use large equipment as in the prior art, but uses paper, metal,
An extruded product having a waste plastic extruded as an extruded product without any or only rough separation, and having a good appearance of the extruded product, and a method and apparatus for molding the extruded product. The purpose is to provide to the market.

[0004]

Means for Solving the Problems In order to solve the above-mentioned problems, the specific invention of the present invention is directed to a modified product which is a recycled product of waste mainly composed of waste plastic. It is a variant formed article characterized by being covered with a resin skin layer.

[0005] In order to solve the above-mentioned problem, the above-mentioned shaped article is a rod-shaped solid article, and its outer surface except the end face may be covered with the skin layer.

[0006] In order to solve the above-mentioned problems, the related invention of the present invention relates to a method in which waste mainly composed of waste plastic is melted and extruded through a molding die, and the outer surface of the extruded product is formed on the outer surface of the extruded product. There is provided a method for molding a deformed product, which comprises melting and extruding a synthetic resin from a die for forming a deformed shape, and coating with a skin layer made of the synthetic resin.

[0007] In order to solve the above-mentioned problems, a related invention is to melt a waste mainly composed of waste plastics, extrude it as a shaped article, and then melt a synthetic resin on the outer surface of the shaped article. And injecting and coating the outer surface with a skin layer made of this synthetic resin.

In order to solve the above-mentioned problems, a related invention relates to an extruder in which an accumulator-type injection machine is connected between an extruder for kneading and melting waste mainly composed of waste plastic and a die for forming a different shape. After the molten waste is stored in the injection machine in a volume corresponding to the molded product, the plunger of the injection machine is moved forward and extruded as a deformed product through a deformable die, and is discharged onto the outer surface of the deformed product. A molding apparatus for forming an irregularly shaped article, characterized in that a discharge port for melting and extruding a synthetic resin and covering with a skin layer made of the synthetic resin is formed in the die for forming an irregular shape.

In order to solve the above problems, a related invention is to provide a first accumulator type injection machine between a first extruder for kneading and melting waste mainly composed of waste plastic and a die head for forming a different shape. A second accumulator type injector is connected between the second extruder for kneading and kneading and melting the synthetic resin and the die head for forming a variant, and a die head for molten waste is connected in the die head. Characterized in that the first flow path and the second flow path for the molten synthetic resin are provided so as to be continuous with a common discharge port, and a die for forming a different shape is arranged at the discharge port. There is as a device.

In order to solve the above-mentioned problem, a related invention is provided with an extruder for extruding a waste mainly composed of waste plastic as a hetero-formed product by mixing and melting the same. A transfer device is provided for moving the deformed shaped article to the injection shaping mold. The deformed shaped article is stored in the injection shaping mold, and the synthetic resin is injected in a molten state onto the peripheral surface of the deformed shaped article. An injection molding machine for forming a skin layer is provided as an apparatus for molding a shaped article. The synthetic resin forming the skin layer is mainly composed of a new material, and the new material is not limited to virgin pellets, but only recycled pellets, only flake-shaped recycled materials, and recycled materials without contamination. A mixture of pellets and virgin pellets, at least one of burrs produced in the molding process in the factory, defective molded products, and crushed products such as film ear pieces, which may be relatively clean with relatively little contamination is there.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 This embodiment is a typical embodiment of the specific invention described in claim 1. In FIG. 1, A denotes a deformed product which is a regenerated product of waste mainly composed of waste plastic. The outer surface 10 of the shaped article A is covered with a skin layer 11 made of synthetic resin containing at least 30% by weight of a new material. It should be noted that the present invention is not limited to these numerical values, and any combination of synthetic resins is possible. The thickness of the skin layer 11 is preferably in the range of 0.2 to 2 mm. In some cases, the skin layer 11 is formed of burrs of resin molded products and chip pieces of crushed products. In short, the skin layer 11 is formed because the ratio of the resin component remelted is higher than that of the waste plastic portion at the center of the molded product. Molding device B for this irregularly shaped article A
An example will be described as a typical embodiment of the device invention according to claim 5. Extruder 20 for kneading and melting waste mainly composed of waste plastics, and die 21 for forming
And an extruder 22 connected to the accumulator, and the waste stored in the injector 22 is extruded through the die 21 for forming as a deformed product A, and at least the outer surface 10 of the formed product A is Extrusion of molten synthetic resin containing 30% by weight or more of new material. Skin layer 1 made of this synthetic resin.
A discharge port 23 for covering with the die 1 is formed in the modified die 21 (see FIG. 2). The content percentage of the new material is merely an example and is not limited.

An example of a method of forming the irregularly shaped article A by the apparatus B will be described as a typical embodiment of the method invention according to claim 3. A waste mainly composed of waste plastic is kneaded and melted by an extruder 20 and stored by an accumulation type injection machine 22. Then, when the kneaded and melted waste is extruded through the profile forming die 21 by the forward movement of the plunger of the injection machine 22, the outer surface 10 of the extruded product A is extruded.
Next, the synthetic resin is melted and extruded from the discharge port 23 of the profile forming die 21, and the outer surface 10 is covered with a skin layer 11 made of the extruded synthetic resin.

The waste may include at least 1 to 20% by weight of waste metal, waste paper, and other waste pulverized matter in addition to waste plastic. Embodiment 2 This embodiment is a typical embodiment of the apparatus invention according to claim 6, and is different from the first extruder 20 for kneading and melting waste mainly composed of waste plastic. A first accumulator type injection machine 22 is connected between the molding die head 21a, and a second extruder 24 for kneading and melting the synthetic resin for the skin and the die head 21a for forming a different shape. Second accumulator type injection machine 2
5, a first flow path 26 for molten waste and a second flow path 2 for molten synthetic resin are provided in the die head 21a.
7 are connected to the common discharge port 23a. The forming die 21 is disposed at the discharge port 23a (FIG. 3).
reference). In order to form the irregularly shaped article by the apparatus B1 in this mode, the waste and the synthetic resin are charged into the first and second extruders 20 and 24, respectively, mixed and melted.
Next, the first and second accumulator type injection machines 22,
In each case, the molten waste and the synthetic resin are temporarily stored in an amount corresponding to the molded product. Next, these injection machines 22, 2
5 is advanced to inject the molten waste and the synthetic resin into the first and second flow paths 26 and 27 of the profile forming die head 21a, respectively, and the profile forming die connected to the discharge port 23a. 21, wherein the outer shape 10 is covered with the skin layer 11 made of the synthetic resin.
Is extruded. At this time, the deformed shaped product A is, for example, a bar-shaped solid product, and the outer surface 10 has a thickness of 0.2
It is covered with a skin layer 11 of about 2 mm made of the synthetic resin.

Embodiment 3 This embodiment is a typical embodiment of the apparatus invention according to claim 7, and the molding apparatus B2 is an apparatus for extruding a waste mainly composed of waste plastic as a deformed product A. And an extruder 20a. A transfer device 32 is provided for moving the molded article A extruded by the extruder 20a to the injection mold 31. The injection molded mold 31 stores the molded article A in the injection mold 31. An injection molding machine 33 for injecting the synthetic resin into the outer peripheral surface 10 of the odd-shaped product A is provided. A method for molding a shaped article according to this embodiment will be described below as a typical embodiment of the method invention according to claim 4. A waste mainly composed of waste plastic is put into an extruder 20a, melted and mixed, and the extruded shaped article A is injected into an injection molding die 31 by the transfer device 3a.
Transfer to 2 and store. Next, the synthetic resin is injection-molded on the outer surface 10 of the shaped article A by the injection molding machine 33, and the outer surface 10 is covered with the skin layer 11.

Example 1 1 Breakdown of Waste a) 90% by weight of polyolefin resin as waste plastic b) 5% by weight of waste paper (newspaper etc.) c) 5% by weight of aluminum cap as waste metal a) Pile length 30 cm Cross section 6 cm square on each side b) Coated synthetic resin layer Resin ABS Thickness 0.2 mm 3 Molding machine a) Extruder b) Accumulation type injection machine 4 Result Outer circumference of the pile which is the irregular shaped product of the above 2 The surface had a good appearance, was not easily scratched, and was difficult to adhere with dirt.

Example 2 1 Breakdown of waste a) As waste plastic: a) -1 97% by weight of polyolefin resin a) -2 2% by weight of non-polyolefin resin b) 1% by weight of non-plastic material 2 a) Pile length 30 cm Square cross section 6 cm on each side b) Coated synthetic resin layer Resin ABS (comprising burrs of resin molded products, chip pieces of crushed material) Thickness 0.2 mm 3 Molding machine a) Extruder b) Accumulation type Injector 4 Result The outer peripheral surface of the pile, which was the irregularly shaped product of the above 2, had a good appearance, was hard to be damaged, and was hard to be stained.

[0017]

According to the first and second aspects of the present invention, the outer appearance of the deformed shaped article, which is a regenerated product of waste, is covered with the skin layer made of the synthetic resin, so that the appearance of the deformed shaped article is good and good. And waste can be used effectively. In particular, in the invention according to the second aspect, when the solid bar is used as a building material such as a pile or a pillar, a civil engineering material, or a park material, its appearance is good, so that the user does not feel uncomfortable. According to the third aspect of the present invention, it is possible to continuously form the generally good shaped article according to the first and second aspects in a single step of extrusion molding. According to the fourth aspect of the present invention, it is possible to form a heavy-weight deformed product whose outer surface is reliably covered with the coating layer. The device inventions according to claims 5 and 6 can carry out the method invention according to claim 3 and exhibit the effects thereof, and in particular, have a long shape as in the case of forming a bar-shaped solid product according to claim 2 in an irregular shape. It is suitable for extruding a shaped article having a large volume and a large capacity in a short time. The device invention according to claim 7 can implement the method invention according to claim 4,
The effect can be exerted, and the heteroformed product can be molded efficiently. In the embodiment, in the case of a skin layer containing at least 30% by weight or more of the new material, the strength and the scratch hardness of the skin layer can be maintained at appropriate values.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an example of a shaped article.

FIG. 2 is a schematic view showing a molding apparatus according to the first embodiment.

FIG. 3 is a schematic view of a molding apparatus according to a second embodiment.

FIG. 4 is a schematic view of a molding apparatus according to a third embodiment.

[Explanation of symbols]

 A Amorphous shaped product 11 Skin layer

Claims (7)

[Claims] 1. An irregularly shaped article which is a recycled product of waste mainly composed of waste plastic, characterized in that the outer surface of the irregularly shaped article is covered with a skin layer made of synthetic resin. Goods. 2. The deformed shaped article according to claim 1, wherein said deformed shaped article is a solid rod-shaped article, and its outer surface is coated with said skin layer except for its end face. 3. When the waste mainly composed of waste plastic is melted and extruded through a forming die, a synthetic resin is melted on the outer surface of the extruded product from the forming die. A method for molding a shaped article, comprising extruding and covering with a skin layer made of this synthetic resin. 4. Extrusion molding as a shaped article by melting a waste mainly composed of waste plastic, and then melting and injecting a synthetic resin on the outer surface of the shaped article,
A method for molding a shaped article, wherein the outer surface is covered with a skin layer made of the synthetic resin. 5. An accumulator-type injection machine is connected between an extruder for kneading and melting waste mainly composed of waste plastic and a die for forming a shape, and the waste melted by said extruder is injected into said injection machine. After storing the volume in the machine corresponding to the molded product,
By the forward movement of the plunger of the injection machine, the plunger is extruded as a deformed product through a deforming die, and a synthetic resin is melted and extruded on the outer surface of the deformed product, and a spout for covering with a skin layer made of the synthetic resin. An apparatus for forming a shaped article, wherein an outlet is formed in the shaped die. 6. A first accumulator-type injection machine is connected between a first extruder for kneading and melting waste mainly composed of waste plastic and a die head for forming a different shape, and
A second accumulator-type injection machine is connected between the second extruder for kneading and melting the synthetic resin and the die head for forming, and a first flow path for molten waste is provided in the die head. And a second flow path for the molten synthetic resin is provided so as to be continuous with a common discharge port, and a die for forming a different shape is arranged at the discharge port. 7. An extruder for mixing and melting waste mainly composed of waste plastic to extrude as a deformed product is provided. The extruded deformed product is subjected to injection molding metal molding. A transfer device for moving to the mold is provided, and an injection molding machine that stores the shaped article in the injection mold and injects the synthetic resin into the peripheral surface of the shaped article in a molten state to form a skin layer. An apparatus for forming a shaped article, wherein the apparatus is provided.