JPH09141752A - Manufacture of synthetic resin siding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To add rigidity while maintaining the advantages of a synthetic resin, and improve heat insulating performance and further, enhance manufacturing efficiency. SOLUTION: This synthetic resin siding is manufactured by packing a synthetic resin foamed layer between a front surface material consisting of a trough-shaped molded synthetic resin and a rear surface material of a sheet-like product. In this case, first, the synthetic resin is extruded into a sheet-like product by an extrusion molding machine 2, then this sheet-like product is formed into a trough-like product using a molding die 9, while being drawn into a coil form by a takeup pinch roll 7, and a synthetic resin foam stock solution is discharged to laminate the sheet-like rear surface material, so that both front and rear surface materials and a core material are integrated together.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a synthetic resin siding used for an outer wall of a building.

[0002]

2. Description of the Related Art At present, synthetic resin siding occupies the majority of the siding market in the United States, and most of them are mainly made of a single sheet resin plate as a surface material (Fig. 5). In recent years, some companies in Japan have also imported synthetic resin siding from overseas or produced and sold it in-house. But,
Considering the climate and the structure of houses in Japan, conventional synthetic resin siding is insufficient in heat insulation and rigidity, so it is difficult to use for actual construction, and it is usually extruded. Therefore, in order to improve heat insulation and rigidity, a synthetic resin foam stock solution injection device was installed in a normal extrusion molding line to stack a synthetic resin foam as a core material on the back surface of a conventional synthetic resin siding. Therefore, when performing extrusion molding and injection simultaneously on a consistent line, it is very difficult to adjust the balance between the extrusion molding speed and the cure line speed after injection, and the length of the line becomes too long. Is very high, especially when the whole line is stopped, it takes a long time to stabilize the shape of the extrusion molding again, so quick recovery is impossible and there is a problem that the manufacturing efficiency deteriorates significantly. .

[0003]

As described above, the synthetic resin siding has the drawbacks of insufficient rigidity and heat insulation performance. Therefore, in the present invention, in the method for producing a synthetic resin siding, while maintaining the advantages of the synthetic resin, rigidity is added, heat insulation performance is also improved, and the adjustment of the balance between the extrusion molding speed and the cure line speed after injection is troublesome. Therefore, the manufacturing efficiency is improved by eliminating the problem and halving the trouble occurrence rate.

[0004]

[Means for Solving the Problems] A coil-shaped synthetic resin sheet is once formed, and is molded in another line using the coil-shaped sheet, and a core material and a back surface material are laminated.

[0005]

EXAMPLE A synthetic resin raw material 1 is heated, and an extruder 2 extrudes a synthetic resin sheet 3 having a constant width and thickness.
The extruded synthetic resin sheet 3 is cooled by the cooling layer 4 to stabilize its shape, and then wound into a coil by the recoiler 5. The coil-shaped synthetic resin sheet 6 is released from the coil by a pinch roll 7, heated in a heating furnace 8 to the softening temperature range of the synthetic resin, and passed through a molding die 9 to form a gutter shape. In the curing furnace 14 in which the synthetic resin foam stock solution 11 is discharged onto the gutter-shaped bottom surface by the injection machine 10 to stack the sheet-shaped backing material 12 and the stock solution is spread by the roll 13 at the same time as the stacking and the atmosphere is maintained at the foaming promotion temperature. Then, the caterpillar-shaped slat plate 15 is used to suppress the filling of a predetermined volume, and the front and back surface materials and the core material are integrated.

[0006]

According to the method for producing a synthetic resin siding according to the present invention, by injecting a synthetic resin foam as a core material, rigidity is added to the synthetic resin siding and heat insulation performance is also improved. By making the sheet into a coil, the manufacturing line length can be made compact and the recovery time in the event of trouble can be shortened, which has the advantage of dramatically improving manufacturing efficiency.

[0007]

[Brief description of the drawings]

FIG. 1 is an example of a method for producing a synthetic resin siding according to the present invention.

FIG. 2 is an example of a method for producing a synthetic resin siding according to the present invention.

FIG. 3 Conventional method for manufacturing synthetic resin siding

FIG. 4 is a synthetic resin siding produced by the method for producing a synthetic resin siding of the present invention.

FIG. 5: Conventional synthetic resin siding

[Explanation of symbols]

 1 ... Synthetic resin raw material 2 ... Extrusion molding machine 3 ... Synthetic resin sheet 4 ... Cooling layer 5 ... Recoiler 6 ... Coil shape Synthetic resin sheet 7 ... Pinch roll 8 ... Heating furnace 9 ... Molding die 10 ... Injection machine 11 ... Synthetic resin foam stock solution 12 ... ..Back surface material 13 ... Roll 14 ... Cure furnace 15 ... Caterpillar slat plate 16 ... Surface material 17 ... Core material

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Claims (1)

[Claims] 1. A method for producing a synthetic resin siding in which a surface material made of a synthetic resin shaped like a gutter and a back material made of a sheet, and a synthetic resin foam layer between the front and back materials are filled. Heat is applied to the resin raw material, and a synthetic resin sheet having a constant width and thickness is extruded by an extruder. After the extruded synthetic resin sheet is cooled to stabilize its shape, it is wound into a coil by a recoiler. The coil-shaped synthetic resin sheet is released from the coil with a pinch roll, heated to the softening temperature range of the synthetic resin, and passed through a molding die once or a plurality of times to form a gutter shape. A synthetic resin foam stock solution is discharged onto the gutter-shaped bottom surface, a sheet-shaped backing material is laminated, and the stock solution is spread at the same time as the stacking, and the spread raw material is filled in a predetermined volume while maintaining an atmosphere at a foaming promotion temperature. In this way, the front and back materials and the core material are integrated. A method for manufacturing a synthetic resin siding, which comprises the above steps.