JPS623829A - Manufacture of siding board - Google Patents

Abstract

PURPOSE:To prevent occurrence of residual deformation and to obtain beautiful appearance of boards by forming the back of a decoration surface of a board into a gentle projection to strengthen the holding force against a hard core material and to spread an adhesive easily and forming connection parts of both outside edges at the final stage. CONSTITUTION:A plate stock 1 made of a flat platelike metal hoop stock or of a cut plate is formed into uneven leg angles 2 and 2' with a short inside leg and a long outside leg at both side edges of the stock 1 by a forming roll. The two sides of each angle are brought to nearly vertical by making the angles 2 and 2' flat. The right and left edges leaving a width corresponding with a decoration surface 1a at the center of the plate stock 1 are bent obliquely in the longitudinal direction to form side walls 3 and 3' and to form the back of the decoration surface 1a into a gentle projection 5, and an adhesive 4 is applied to the projection 5. A hard core material 6 is inserted into the projection 5. Both the side walls 3 and 3' are bent into a vertical position to hold the core material 6. After male and female connection parts 7 and 8 are formed, linguiform pieces 9 and 10 are bent.

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
No. 29 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 sandwich 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 uneven. In addition, in the latter method, in order to eliminate the drawbacks of the former, the core material is stored near the end of the process, and the formed side walls are simply made at right angles to reduce distortion of the metal plate. This was an attempt to prevent the corners of the vehicle from being destroyed. However, with this method, the male and female parts are all molded first, so
There were disadvantages in that both edges in the longitudinal direction were wavy due to residual strain, and the clamping force was significantly reduced due to dimensional errors during manufacturing.

[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 the outer edge between the male and female connecting portions is 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. FIGS. 1(a) to 1(g) are explanatory diagrams showing the outline steps of the above method. Next, as shown in Fig. Form an equilateral chevron 2.2'.Next, as shown in figure (C), move the scalene chevron 2.2' inward and make the two sides of the chevron almost perpendicular.Next, as shown in figure +d1 A side wall 3.3' is formed by bending the left and right edges diagonally along the longitudinal direction, leaving only a width for the decorative surface 1a at the center of the plate material 1, and the decorative surface 1a is formed into a small convex shape, so-called large radius. It is formed into a convex shape, 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 wall 3.3' inward by approximately 90 degrees, as shown in figure (f). In addition to sandwiching the hard core material 6, the male and female connecting portions 7.8
It forms most of the And in the final process (
It is completed by bending the tongue pieces 9 and 10 as shown in the figure. To explain further, Figure 2 (a) to (evening)
This is a more detailed explanation of the process (flower diagram) shown in FIGS. 1(a) to (gl). That is, as shown in FIG. , Next, (b) form the protrusions 11 as shown in the figure. (c) - (
g) The diagram shows scalene 2.2' at 15°-30°-45°.
-60°-756, and then mold so that the two sides that will become the engaging groove/clamping part 1z of the male and female connecting parts 7.8 are almost perpendicular, as shown in Figure (H). do. Next, hard core material 6
In order to form the recess 5 for storing and holding the
~ (Le) As shown in the figure, the side wall 3.3' is 156 → 30°
→Mold at 45°. In particular, in Figure 1, the decorative surface 1a is shaped convexly with a width of 180 mm as shown in Figure 1 (dl), and Δh.
=i~2■ It is curved with a forming roll shown in FIG. 3 as shown in FIG. 3, and is finally formed so that no gap is formed between the hard core material 6 and the decorative surface lag surface of the plate material 1. Next, (e) the side wall 3.3' is inclined at 75 degrees as shown in the figure, and the hard core material 6 is inserted into the recess 5 of the plate l, and then Hold with roller R. Next, as shown in the figure, the side wall 3.3 has the same height as the thickness of the hard core material 6.
' are brought inward and formed into a substantially vertical shape as shown in FIG. 4, and the hard core material 6 is held between them as shown in the (force) diagram. Next, as shown in Figs.
Shape as shown. That is, the tip of the extension portion 8a will not be wavy 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]

Figure 1 (al~(gl) is an explanatory diagram schematically showing the process order of the siding board manufacturing method according to the present invention, Part 2 (
A) to (D) are explanatory diagrams showing the cross section of the plate material in roll forming, and FIGS.・Plate material, 2.2′... Scalene shape, 3.3′・
...Side wall, 4...Adhesive, 5...Recess, 6...Hard core material, 7...Male type connection part, 8...Female type connection part, R
...Forming roll. (C) +e) So 2 m (A) (8) (0,)

Claims (1)

[Claims] (1) Form a scalene chevron shape on both sides of a flat metal hoop material or a cut plate material with a forming roll, the inside being short and the outside long.
Shape the sides so that they are almost vertical to form the male and female connecting parts, then bend the left and right edges inward diagonally leaving just the width of the hard core material whose surface will be the decorative surface in the center of the board. At the same time as bending to form side walls, 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 of manufacturing a siding board, which comprises bending the board to sandwich a hard core material, and then bending the outer ends of the male and female connecting parts.