JPH0580287B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for producing siding boards (hereinafter simply referred to as boards) useful as dry-type exterior materials for buildings and structures.

[Conventional technology]

The method for manufacturing this type of board was
Publication No. 3529 and Japanese Patent Publication No. 59-38056 are known.

[Problem that the invention seeks to solve]

That is, in the conventional method of manufacturing boards, in the former method, when forming a metal hoop material, a concave part and a protrusion for storing the core material are formed in parallel, the core material is inserted, and then the protrusion is inserted into the core material. This was a method in which the core material was clamped by pressing the core material between the core materials, and then the bent portion at the boundary between the outside of the protrusion and the flat portion was expanded to form a flat surface parallel to the core material. In this method, the recess that accommodates the core material is formed flat with two protrusions, and when the core material is held, the protrusions are crushed, so unreasonable force is applied to the corners of the core material. The disadvantage was that the corners were destroyed. Furthermore, it is necessary to crush the protrusions in order to hold the core material, or to develop the area between the outside of the protrusions and the flat part into a flat surface, which requires many unreasonable processing steps, requires multiple stages of forming rolls, and the metal plate is There were drawbacks such as distortion and damage to the paint film. Furthermore, since there are many steps after the core material is stored, a gap is created between the core material and the metal plate, resulting in a disadvantage that the surface becomes mountain-like. Also, the latter method eliminates the drawbacks of the former,
This is an attempt to reduce distortion of the metal plate and prevent breakage of the corners of the core material by making storage of the core material a near final step and by simply making the formed side walls at right angles. However, with this method, the parts that will become the male and female parts are all molded first, so both longitudinal edges become wavy due to residual strain, and the clamping force is significantly reduced due to dimensional errors during manufacturing. There were flaws.

[Means for solving problems]

When storing the hard core material, the present invention forms the back surface of the flat part, which is the decorative surface of the board, into a loose convex shape to strengthen the force for holding the hard core material, and also facilitates the spread of the adhesive. The present invention proposes a method of manufacturing a board in which both outer edges of the male and female connecting portions are processed in the final process to eliminate wavy edges.

〔Example〕

Below, a method for manufacturing a board according to the present invention will be explained using the drawings. Figures 1a to 1g are explanatory diagrams showing the outline steps of the above method. ). Next, as shown in figure b, scalene chevrons 2, which are short on the inside and long on the outside, are used to form male and female joints, which will be described later, on both edges in the longitudinal direction of the plate.
2' is formed. Next, as shown in Figure c, the scalene chevrons 2 and 2' are moved inward to make the two sides of the chevrons almost vertical. Next, as shown in Figure d, the left and right edges are bent obliquely along the longitudinal direction, leaving a width at the center of the board 1 where the surface becomes the decorative surface 1a, forming side walls 3, 3', and forming the decorative surface 1a. It is formed into a small convex shape, a so-called convex shape with a large radius, and the adhesive 4 is discharged onto this surface. Next, as shown in figure e, insert the hard core material 6 into the recess 5, press it with rollers R, and then bend the side walls 3, 3' inward by approximately 90 degrees, as shown in figure f. It holds the hard core material 6 and forms most of the male and female connecting parts 7 and 8. In the final step, the tongue pieces 9 and 10 are bent as shown in Figure g to complete the process.
To explain further, Fig. 2 a to ta are from Fig. 1 a to g.
This is a more detailed explanation of the process shown in (flower diagram). That is, as shown in Figure A, the extension part 8a of the female connecting part 8 is molded, and then the protrusion 11 is molded as shown in Figure B. The scalene angle shapes 2 and 2' are formed in the order of 15° → 30° → 45° → 60° → 75°, and then the male and female connecting parts 7 and 8 are formed as shown in the diagram.
The two sides, which serve as the engagement groove and holding portion 12, are substantially perpendicular to each other. Next, in order to form a recess 5 for holding and holding the hard core material 6, the side walls 3, 3' are formed at an angle of 15°→30°→45° as shown in the drawings.
In particular, in the diagram, the decorative surface 1a is curved into a convex shape with a width of 180 mm as shown in FIG. 1d by the forming roll shown in FIG. The molding is performed so that no gap is formed between the decorative surface 1a of the plate material 1 and the back surface of the decorative surface 1a of the plate material 1. Next, as shown in Figure 1, the side walls 3 and 3' are tilted at 75°, and the hard core material 6 is inserted into the recess 5 of the plate 1, and this is pressed with rollers R as shown in Figure 1e. . Next, as shown in Figure 4, the side walls 3 and 3', which have the same height as the thickness of the hard core material 6, are brought inward and formed almost vertically as shown in Figure 4, and the hard core material 6 is covered. It is held in place as shown in the figure. Next, as shown in Figs. 5 and 5, the tongues 9 and 10 of the male and female connecting portions 7 and 8 are formed as shown in Figs. 5a to 5c. That is, the tip of the extension portion 8a is prevented from waving due to residual strain.

〔Effect of the invention〕

As described above, according to the present invention, the residual strain in the board material does not appear significantly in the final process and can be formed so as to release it, so that a board with a beautiful appearance can be manufactured. In addition, because the structure is such that the hard core material is held between the top and bottom and both sides by elasticity, there is no gap between the hard core material and the plate material, and the holding force is greatly strengthened. Furthermore, since the decorative surface has a concave shape and there is less contact with the roll, there is less damage to the paint film than before.

[Brief explanation of the drawing]

1A to 1G are explanatory diagrams schematically showing the process order of the method for manufacturing a siding board according to the present invention, FIGS. Figures 5a to 5c are explanatory diagrams showing a part of the above manufacturing process. 1... Plate material, 2, 2'... Scalene chevron, 3,
3'...Side wall, 4...Adhesive, 5...Recess, 6...
...Hard core material, 7... Male type connecting part, 8... Female type connecting part, R... Forming roll.

Claims (1)

[Claims] 1. Form a scalene chevron shape on both sides of a flat metal hoop material or cut plate material with forming rolls. Form vertically to form the male and female connecting parts, then bend the left and right edges diagonally inward to form the side walls, leaving only the width of the hard core material with a decorative surface in the center of the board. At the same time, the back side of the decorative surface is formed into a small convex shape, and then a hard core material is fed onto the back surface of the decorative surface formed into a convex shape, and then the both side walls are bent almost vertically. A method for manufacturing a siding board, characterized in that a hard core material is sandwiched, and then the outer ends of the male and female joints are bent at the same time.