JPS5947643B2 - Manufacturing method for plastic material laminated extrusion molded products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention efficiently produces building materials by extruding asbestos cement, concrete, gypsum, and similar raw materials (plastic materials) in multiple layers using an extrusion molding machine. Regarding the manufacturing method for producing.

Architectural components made of slow sowing, asbestos cement, concrete, gypsum, and similar raw materials are manufactured by extrusion molding, which generally uses a vacuum kneader and an extrusion molding machine. This is because there is an advantage that molded products with various cross-sectional shapes can be efficiently manufactured by appropriately replacing the mouthpiece (die) of the discharge pipe.

However, uncured products made by this extrusion molding method are flexible immediately after being extruded from an extrusion molding machine, so the shape immediately after extrusion, especially those with complicated surface shapes, or hollow parts inside. However, depending on the size of the hollow portion, the molded product may be deformed before it hardens, and has the disadvantage of lacking self-shape retention. Desirable final products for extruded products made of asbestos cement, concrete, gypsum, and similar plastic materials are lightweight, hardening with a predetermined shape completely maintained, and the ability to mold complex shapes. These include that the product be mass-produced, that it maintains accuracy that meets specified dimensions, that it has appropriate strength, and that it has excellent fire resistance. The present invention was proposed for the purpose of providing a method for manufacturing an extrusion molded product of plastic material that can satisfy the above conditions, and when extruding the plastic material using an extrusion molding machine, The plastic material is separated into a plurality of upper and lower sheets using a molding plate installed in the discharge pipe of the extrusion molding machine and a release oil supply means, and while applying release oil or the like between the separated surfaces,
A method for manufacturing a plastic material laminate extrusion molded product, characterized in that a plurality of molded plates are extruded from an extrusion molding machine in a laminated and integrated state, and after curing and hardening, the molded plates are separated to obtain a molded product. It is.

The method of the present invention will be specifically explained below with reference to the accompanying drawings.

In FIG. 1, 1 is a part of the discharge pipe side of a well-known extrusion molding machine, and a screw T for pumping raw material A is installed inside the extrusion molding machine.

3 is a raw material discharge pipe whose base end is concentrically connected to the discharge side end of the extrusion molding machine 1;
A cap 2 is formed to regulate the shape of the outer surface of the molded product.

Reference numeral 4 denotes a molded plate support member disposed inside the discharge pipe 3 near its base at right angles to the axial direction of the discharge pipe 3. The support member 4 is made of a hollow pipe and is coated with release oil, etc., which will be described later. It also serves as a refueling passage to the seepage outlet 6 of the.

Reference numeral 5 denotes a pair of upper and lower molding plates, one end of which is fixed to the center of the support member 4 and the other end of which extends to the vicinity of the outer end of the mouthpiece 2; It is installed vertically symmetrically in Sakai, and is installed over the entire width in the direction perpendicular to the plane of the paper with respect to the discharge pipe 3 and the mouthpiece 2.

Further, the gap between the pair of upper and lower molded plates 5 forms an oil passage communicating with the oil supply passage 4, and communicates with a seepage port 6 for release oil, etc. provided on the outside of the tip of each molded plate 5. . The release oil, etc. supplied from the outside via the molding plate support member/oil supply passage 4 passes through the oil path between the upper and lower molding plates 5, and is once separated into the upper and lower parts by the molding plate 5 from the seepage port 6. Inject between the separated surfaces of the molded product discharged from the nozzle 2 to the outside. and is applied uniformly to the separation surface. The member 4, the oil passage between the upper and lower forming plates 5, the seepage port 6, etc. form a means for supplying release oil and the like. In this case, the molded product is separated into upper and lower parts by the upper and lower molding plates 5, and is discharged to the outside from the mouthpiece 2 while being molded.
The two plates are extruded in a laminated state, and the two plates are held as a strong laminate molded product that is bonded and integrated as shown in FIG.
Then, after curing and curing, the laminated molded product is separated by the action of a release oil or the like and made into a product. Therefore, it is possible to prevent defects such as those seen in conventional extrusion molding methods, that is, deformation of the extruded product during uncuring, and to mass-produce molded products with excellent dimensional accuracy. In summary, the present invention, when extruding a plastic material using an extrusion molding machine, separates and molds the plastic material into a plurality of upper and lower sheets using a molding plate and release oil supply means installed in the discharge pipe of the extrusion molding machine. ,
The feature is that a plurality of molded plates are extruded from an extrusion molding machine in a laminated and integrated state while applying release oil or the like between the separated surfaces, and after curing and hardening, the molded plates are separated to obtain a molded product. According to the present invention, the practical effect of realizing a method for manufacturing a molded product using an extrusion molding machine that satisfies the various conditions described above can be achieved. can be mentioned.

In the above embodiment, a case was described in which a molded product of two upper and lower plates is molded at the same time, but by appropriately changing the number of arrayed molding plates 5 and their arrangement, a molded product with three or more laminated plates can be manufactured. It is also possible to do so.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of one embodiment of the present invention, and FIG. 2 is a perspective view of a laminate molded product according to the present invention. 1: extrusion molding machine, 2: mouthpiece, 3: discharge pipe, 4: molding plate support unit and oil supply passage, 5: molding plate, 6: seepage port, 7: raw material, screw for pumping A.

Claims (1)

[Claims] 1. When extruding a plastic material using an extrusion molding machine, the plastic material is separated into a plurality of upper and lower sheets using a molding plate and a release oil supply means installed in the discharge pipe of the extrusion molding machine, and the separation surface A plastic material characterized by extruding a plurality of molded plates in a laminated and integrated state from an extrusion molding machine while applying release oil or the like between them, and then separating the molded plates after curing and hardening to obtain a molded product. A method for producing a laminated extruded product.