FR2724855A1 - PROCESS FOR MANUFACTURING WELDED METAL WIRE ARTICLES, OF THE TYPE COMPRISING A BELT - Google Patents

Abstract

The manufacturing process consists of: - welding on the base weft straight and parallel wires intended to form the belt; - Performing at least one operation of folding the son in order, in particular, to shape the belt by bringing their ends together; - To assemble end to end, by welding, the ends of said son to obtain the belt. This process makes it possible to obtain grids or baskets, the belt of which consists of two half-belts assembled end to end by welding. This process makes it possible in particular to make grids and / or baskets on a single production line, with a series of simple folding and welding operations.

Description

The present invention relates to a method of manufacturing articles made of

welded wire

  having a peripheral belt.

  These wire articles are flat type like grids. It can also be volume articles such as baskets used for example in household appliances, refrigerators,

  freezers, dishwashers, etc ...

  Articles of this type generally comprise a belt consisting of a simple shaped and butted wire, on which is welded the frame of a grid or a

  lattice put in volume if it is a basket.

  This technique, for grids and for baskets, requires two manufacturing lines: - a line for the manufacture of the belt and a line for the preparation of the lattice and for the assembly of

the belt on the folded lattice.

  Positioning the belt on the trellis requires complex and specific tooling for each type of basket. In addition, after welding, it is often necessary to perform a staking operation to level all the ends of the son constituting the lattice. This trimming operation creates very sharp edges at the ends of the wires, which affects the quality of the protective coating when it comes to used basket

  in the field of household appliances for example.

  The present invention proposes a method for producing wire articles that makes it possible, on the one hand, to simplify manufacture and, on the other hand, to improve

the quality of the products.

  The method according to the invention also has the advantage of accommodating simple machines and tools that are suitable for a wide variety of articles. Changes of series of articles can,

  thanks to this process, take place in a few minutes.

  The process according to the invention consists in - welding,

  on wires constituting the basic frame, half

  Belts in the form of straight and parallel threads between

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  them, - to perform at least one folding operation to, in particular, conform the son and bring their ends together to form the belt, - to assemble

  by welding, end to end, the ends of said half

  belts. The method according to the invention makes it possible to carry out

  articles on one and the same production line.

  The initial phase of preparation and ordering of the various son can be carried out with a very high precision since it is about rectilinear son. The son constituting the half-belt are distributed automatically from a large storage warehouse for example, in the same way as the other son constituting the frame and / or the lattice. In addition, these yarns can be prepared at their ends with a chamfer, for

  better accommodate a protective coating.

  This method according to the invention does not prevent performing, depending on the type of articles, other operations such as the addition of threads in the corners for a grid or, in the case of baskets, to carry out complementary welding operations for the other wires of the lattice after folding, or else welding operations of inserts such as handles

  or else folding operations of the belt itself.

same, etc ...

  The invention also relates to the product obtained by the process and in particular to a grid consisting of parallel wires, welded to the belt, which belt consists of two half-belts assembled by butt welding after bending of the ends.

said half-belts.

  The invention also relates to a basket consisting of a welded and folded lattice whose belt is

  consisting of two half-belts welded end to end.

  The invention will be further detailed using the

  following description and accompanying drawings given for

  indicative, and wherein: - Figure 1 shows a grid made by the method according to the invention; - Figure 2 shows the blank of the grid before the finger jointing operation of the half-belts;

  FIG. 3 represents the blank of a basket, that is,

  say the first operation which consists of positioning all the wires constituting the basket and welding these wires; - Figures 4 to 6 respectively represent the operations 2 to 4 that is to say the operations of folding and setting volume of the basket; - Figure 7 shows the welding operation of the belt; - Figure 8 shows the operation of welding two sides of the basket on the belt; FIG. 9 represents a complementary operation

setting up handles.

  FIG. 1 represents a simple grid constituted by threads 1 forming a weft, and a belt 2 on which said threads 1 are welded. The belt 2 is constituted, as represented in FIG. 2, by two rods each forming one half of the belt. . These rods 2 'and 2 "are straight and parallel to each other at the start, they are welded with the ends of the son 1. They may be of the same length or have a

different length.

  These rods 2 'and 2 "are half-belts, they undergo a folding operation and their

  ends, placed end to end, are assembled by welding.

  Note, Figure 1, the welds 3 which testify

  the presence of two half-belts.

  The making of a basket is illustrated in Figures 3 to 9. It consists, in a first step, as shown in Figure 3, to position the son constituting the lattice; these threads intersect at right angles and are welded together. There are 1 son constituting

  sleepers and wires 4 which are parallel to half

  belts 2 'and 2 "These half-belts consist of straight and parallel wires between them, likewise

  length or different length depending on the case.

  As for the grid of FIGS. 1 and 2, the wires

  1 are welded on the half-belts 2 ', 2 ".

  After this first operation, the blank is subjected to a second operation, Figure 4, which consists of folding the son 4 to achieve two sides of the basket. The bending axes of the wires 4 constitute edges of the

bottom of the basket.

  Figure 5 shows the folding of the half-belts

2 'and 2 ".

  FIG. 6 shows the folding operation of the yarns 1 to form the other two sides of the basket and, simultaneously, position the two half-belts 2 'and 2 "already folded previously in the same plane which

  constitutes the upper edge of the basket.

  Figure 7 shows the welding operation for butting the ends of the two half-belts. The weld point 3, on each side of the basket, is

preferably between two wires 4.

  FIG. 8 represents the welding operation of the wires 4 constituting the two folded sides at the level of the operation illustrated in FIG. 4; these wires 4 are soldered

  on the belt 2 that has just been assembled.

  FIG. 9 illustrates complementary operations such as for example the fitting of handles 6 on the belt

device 2.

  Other operations can be envisaged, for example bending or folding of the belt

2 as appropriate.

  It should be noted that this making of baskets requires only elementary folding tools along axes which, on a production line, are easily adjustable. The reference signs inserted after the technical characteristics mentioned in the

  claims are only intended to facilitate the

  understanding of these and in no way limit

the scope.

Claims (4)

- CLAIMS -   1. A method for manufacturing articles of welded wire of the type comprising a peripheral belt, characterized in that it consists: to weld on the base frame, laterally, straight son, parallel to each other, each constituting a part of the belt (2); at least one folding operation for, in particular, conforming said belt by bringing its ends together; - to assemble by welding, end to end, said ends half-belts.   2. A manufacturing method according to claim 1, characterized in that it consists in performing, depending on the type of articles, complementary operations of folding and / or welding the mesh or inserts such as handles.   3.- Article in wire, of the grid type,   carried out according to any one of claims 1 or   2, consisting of parallel wires (1) welded to a belt (2), characterized in that the belt (2) consists of two demiceintures (2 ', 2 "), assembled end to end by welding.   4.- Article in wire, of the basket type,   carried out according to any one of claims 1 or   2, consisting of a mesh formed of son (1 and 4), welded, folded and provided with a peripheral belt (2), characterized   in that said belt consists of two half   belts (2 ', 2 "), assembled end to end by welding.