JPH0236335B2 - SHIKAKUKEIJOKAIKOOJUSURUKINZOKUEKISUPANDOZAINOSEIZOHO - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a method for manufacturing expanded metal materials having square openings.

Conventional technology Almost all conventional expanded aluminum materials have hexagonal (tortoise shell) openings, which have not changed over the past 10 years, making them very monotonous and not suitable for architectural design. It was not possible to meet the needs of users. Therefore, it has been considered to make expanded metal materials with rectangular openings by further increasing the tensile expansion force during the production of expanded metal materials, but if the tensile expansion force is too large, the web part of the extruded material There was a problem in that the expanded metal material with a rectangular opening could not be made because the opening was broken.

Purpose of the Invention The purpose of the present invention is to solve the above-mentioned problems, and to prevent the web portion of the extruded material from being broken at all.
Expanded metal materials with rectangular openings can be efficiently produced, thereby breaking the monotony of patterns of conventional expanded metal materials with hexagonal openings and meeting users' demands in terms of architectural design. be able to. It is an object of the present invention to provide a method for manufacturing an expanded metal material having a rectangular opening.

Composition of the Invention In order to achieve the above object, the present invention uses an extruded material made of parallel cords and a web that connects adjacent cords at the middle part of their width. A large number of slots of a predetermined length extending in the length direction are formed in the web in a staggered arrangement when viewed from the plane of the entire extruded material, and
A residual web of the required length is formed between the slots, and the extruded material is stretched and expanded in the left-right direction to bend the cord and create a metal expanded intermediate molded product having a large number of hexagonal openings, and then, All remaining webs of this intermediate molded product and the parallel straight portions of the cords connected by these are fitted with break-prevention metal fittings having a U-shaped cross section, and in this state, the intermediate molded product is further pulled and expanded from side to side. The gist is a method for producing an expanded metal material having a square opening, which is characterized by bending the inclined part of the cord perpendicularly to the parallel straight part to produce a finished metal expanded molded product having a square opening. There is.

Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

The extruded material 1 used as the raw material is made of, for example, an aluminum extruded material, and as shown in FIG.
This is made up of parallel cords 2 and a web 3 connecting adjacent cords 2 at the midpoint of their heights. Note that as the material of the extruded mold member 1, not only aluminum but also other metals that are relatively easily deformed plastically may be used.

Next, as shown in FIG. 2, a large number of slots 4 are formed in each web 3 of the extruded material 1 in a staggered arrangement when viewed from the plane of the entire extruded material 1. This slot 4 may be formed by a conventionally known method, and in the embodiment, it is formed by cutting out the entire width of the web 3, but if necessary, it may be formed by simply making a cut in the middle part of the width of the web 3. You can just put it in. Next, the extruded material 1 is stretched and expanded in its width direction. As a result, the cords 2 are bent at both ends of the remaining web 3a, and an expanded intermediate molded product 1 as shown in FIG.
Get 1.

As shown in FIGS. 4 and 5, all remaining webs 3a of the intermediate molded product 11 and the cord parallel straight portions 2 connected by these are then removed.
A break-prevention fitting 6 having a U-shaped cross section is fitted over a and 2a.

In this state, by further pulling and enlarging the intermediate molded product 11 from side to side, the inclined portions 2b, 2 of the cord 2 are expanded.
b is bent at right angles to the parallel straight parts 2a, 2a. At this time, parallel straight section 2 of code 2
Since the remaining web 3a between the webs a and 2a is protected by the breakage prevention metal fitting 6, there is no chance of it being broken, and as shown in FIG. An expanded finished molded product 12 having the following properties is obtained.

Note that depending on the type of metal that is the material of the expanded material, plastic deformation may not be sufficient even with the above-mentioned two-time stretching process, and the material may become flattened into a hexagonal shape due to so-called spring back. In such a case, for example, as shown in FIG. 7, a pair of front and rear clamping tools 8 and 9 are inserted inside the flat hexagonal opening 5 of the unfinished expanded molded product 13 after the second stretching expansion. By means of these clamping tools 8 and 9, the inclined parts 2b and 2b of the cord 2 are further bent at right angles to the parallel straight parts 2a and 2a, so that they have a rectangular shape when viewed from a plane as shown in FIG. What is necessary is to obtain an expanded finished molded product 12 having an opening 7 of .

Effects of the Invention As described above, the present invention provides parallel code 2
and a web 3 that connects the adjacent cords 2 at the middle part of their widths.A number of slots 4 of a predetermined length are formed in the web 3 extending in the length direction. Extruded material 1
In addition to being in a staggered arrangement when viewed from the overall plane,
Slot 4 Existence of required length between comrades Web 3
a, and by pulling and expanding this extruded molded material 1 in the left-right direction, the cord 2 is bent to create a metal expanded intermediate molded product 11 having a large number of hexagonal openings 5, and then, this intermediate molded product 11 is All remaining webs 3a and the cord parallel straight sections 2a, 2 connected by these
Fit and cover the breakage prevention metal fitting 6 with a U-shaped cross section on a.
In this state, by further pulling and enlarging the intermediate molded product 11 to the left and right, the inclined portions 2b, 2b of the cord 2 are
is bent at right angles to the parallel straight parts 2a, 2a to produce a metal expanded finished molded product 12 having a rectangular opening 7, and the remaining web 3a of the extruded material 1 is completely broken. The expanded metal material 12 having the rectangular opening 7 can be efficiently produced without any problems, thereby breaking the monotony of the pattern of the conventional expanded metal material 11 having the hexagonal opening 5 and improving the architectural design. This has the effect of being able to meet the needs of users.

[Brief explanation of drawings]

The drawings are for explaining an embodiment of the method of the present invention, and FIG. 1 is a partial perspective view of an extruded material that is a raw material for an expanded material, and FIG. 2 is a partial perspective view of the same extruded material provided with a slot. Figure 3 is a partially enlarged plan view of the metal expanded intermediate molded product, Figure 4 is a partially enlarged plan view of the metal expanded intermediate molded product.
The figure is a partial enlarged plan view of an intermediate molded product covered with breakage prevention metal fittings, Figure 5 is a partial enlarged perspective view of an intermediate molded product covered with the same metal fittings, and Figure 6 is a partial enlarged plan view of a metal expanded finished molded product. 7 are partially enlarged plan views showing the state in which the shape of the unfinished expanded material is corrected by the clamping tool. 1... Extruded mold material, 2... Cord, 2a, 2a...
...Parallel straight part, 2b, 2b... Slanted part, 3... Web, 3a... Residual web, 4... Slot, 5... Hexagonal opening, 6... Fracture prevention fitting,
7... Rectangular opening, 11... Metal expanded intermediate molded product, 12... Metal expanded finished molded product.

Claims (1)

[Claims] 1 An extruded material 1 made up of parallel cords 2 and a web 3 that connects adjacent cords 2 at the middle part of their width is used as a material, and a large number of predetermined predetermined shapes extending in the length direction are formed on the web 3 of the extruded material 1. Slots 4 of the same length are opened in a staggered arrangement when viewed from the plane of the entire extruded material 1, residual webs 3a of a required length are formed between the slots 4, and the extruded material 1 is stretched and expanded in the left-right direction. By bending the cord 2, a metal expanded intermediate molded product 11 having a large number of hexagonal openings 5 is made, and then all remaining webs 3a of this intermediate molded product 11 and the cord parallel straight lines connected by these are bent. A break prevention metal fitting 6 having a U-shaped cross section is fitted over the parts 2a, 2a, and in this state, the intermediate molded product 11 is
By further pulling and expanding the cord 2 from side to side, the inclined parts 2b, 2b of the cord 2 are bent at right angles to the parallel straight parts 2a, 2a, thereby producing a metal expanded finished molded product 12 having a rectangular opening 7. A method for manufacturing an expanded metal material having a rectangular opening.