SI9700226A - Device for high frequency welding of parallel bundles - Google Patents

Abstract

The device for high frequency welding, particularly welding of office accessories like folders, albums etc. which basically consists of a working table (1), a welding head (2), guides (3) with a lower moving welding plate (4), an upper welding plate (5) reaching towards the welding plate (4) beneath the welding head (2), features guides (3) for the moving welding plate (4) made like parallel consoles (6) looking freely from the table (1) which hold the moving lower welding plate (4) made with longitudinal cut-outs (8) and bridges (9) between them.

Description

A device for high-frequency welding of parallel bundles

FIELD OF THE INVENTION

The subject of the invention is a device for high-frequency welding of parallel bundles, in particular for diaries, planners, catalogs, etc. of plastics.

A technical problem

The technical problem solved by the invention is how to design such a device that will allow the welding of parallel bundles in a notebook in one working procedure.

The prior art

There are known devices for high-frequency welding of plastic films in various forms. The essential feature of all these devices is that they allow the welding of several films arranged just above each other, so that weld is passed through all the layers, or that they allow only one bundle to be made.

Such welding machines are designed in such a way that the guides for the lower welding plate extend transversely from one side of the machine through the central open section to the opposite side of the machine. An engraving with a pattern of welding fields is made on the plate. The upper pressure welding plate, which also contains an engraving of the welding fields, is mounted on a high-frequency welding head that lies above the lower welding plate. Such construction allows for multi-layer welding at the same time. Moving the lower welding plate below,

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that is, away from the top welding plate, allows faster work. At least two of the welding plates below are used. When one plate with the welding machine is in the welding process, and on the other free and lateral part of the leading lower welding plate, a new semi-finished welding product is placed at the same time.

If, in this sense, a notebook made of only one bundle is weldable, we are limited to a relatively small thickness or a small number of leaves in the bundle. With a large number of sheets or foils, it is not possible to ensure precise stacking on the edge of all sheets. The back of such a notebook swells, and the edges of the leaves also form an undesirable convex shape.

For albums or catalogs and the like, in which relatively thick sheets are inserted, e.g. photographs or printed matter on thicker paper, the overall thickness increases beyond a reasonable extent to ensure a proper appearance. Therefore, all such fancy goods are made with a very small number of sheets, which still allow for an increase in the total thickness of the sheets and the items inserted without deteriorating appearance. For albums or catalogs with a larger number of sheets, folders with mechanical ring stapling mechanisms are therefore used.

However, there is also a need for bound albums or catalogs with a larger number of single sheets in the form of a book with a protruding back and concave contact with the edges of the sheets, due to the different appearance compared to folders with clamping mechanics, of course at a competitive price. However, a reasonable price can only be achieved by reducing the cost of the manufacturing process, i.e. with a simple tool and especially with as little work as possible.

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The solution to a technical problem

The described technical problem is solved by the invention by the fact that on the standard high-frequency welding machine, a new basic welding plate with parallel grooves is made, the length of which is equal to the length of the back or the fold of the individual foil. The distance between the notches and the widths of the bridges between them are equal to the width of the intended guards. The number of bridges determines the maximum number of bundles that we plan to weld into the notebook. The upper pressure welding plate, which is located under the welding head, contains a suitable pattern of welds. The base welding plate is movably mounted on two parallel runners,

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who pray freely from the machine and under which open space is provided.

The bridges are designed to hang individual bundles of foils so that the bend on the bridle determines the welding edge of each bundle. A single or multi-layer cover lying on the lower welding plate is mounted over the bundles thus mounted. The upper welding plate contains such a weld pattern that provides quality welds of all parallel bundles on the back and also the aesthetic appearance of the outer surface of the back to cover uninteresting longitudinal bundles.

The freewheel guides of the lower welding plate allow the lower welding plate to be moved freely to the welding position, while the bundles and the back of the welding process are manually mounted on the second lower welding plate. Replacing the bottom weld plate with an already welded product with another plate on which the welding semi-finished product is prepared does not cause problems because of the new guides, since it has led a full space below its length, which does not interfere with the movement of the plate due to the bundles below.

The essence of the invention will be explained in more detail below with the description of a preferred embodiment shown in the accompanying drawings, in which FIG. 1 is a perspective view of a device according to the invention; and FIG. 2 crosses the cross-section of the welding plates of the device with the weld inserted.

The high-frequency welding device is essentially derived from a workbench 1, a welding head 2, a guide 3 with a lower movable welding plate 4, a pressure upper welding plate 5 against a welding head 4 and a high-frequency welding unit which is installed in the table 1 and Chapter 2, and is not shown separately in the drawings.

An essential feature of the invention is that the guides 3 for the movable welding plate 4 are made in parallel and free from the table of the praying console 6, which are constructed in a known manner with the guide strips 7 and in the drawings which are not shown to the known lifting assembly. manual control by lifting guide rails 7 releases the lower welding plate 4 on the guides 3 at the moment of pressure of the upper welding plate 5 during hatching and allows the lower welding plate 4 to be manually moved away from the welding site and to replace one lower welding plate 4 with a welded product with another lower welding plate 4 with a semi-finished product for welding.

26046 / D18-VIH-96.

In the lower welding plate 4, elongate sections 8 and bridges 9 are made between them. The sections 8 run parallel to each other and at a distance that determines the spacing of the bundles A on the back B or between the covers forming the notebook. The bridges 9 define the welding fields, i.e. length and width, of individual bundles A at their bend. The number of bridges 9 defines the maximum number of bundles A provided for each volume.

The upper pressure welding plate 5 contains a pattern of a welding box not shown in the drawing. This sample must be substantially such that it fits with the pattern of the bridges 9 to achieve welds at the bend of the individual bundles A, and may additionally have additional sampling to achieve a more varied appearance of the back. The execution of the pattern is known.

For each version of the notebook, a dimension-appropriate lower welding plate 4 and an upper welding plate 5 must be made in accordance with high-frequency welding technology.

It is understood that one of skill in the art may, on the basis of knowledge of the present invention, carry out other embodiments without departing from the spirit of the invention as defined in the appended claims.

Claims (3)

Patent claims 1. A high-frequency welding device essentially derived from a workbench (1), a high-frequency welding head (2), guides (3) on which the lower movable welding plate (4) is movably mounted, under the welding head (2) made against the welding plate (4) presses the upper welding plate (5) and the high-frequency welding unit located in the table (1) and the head (2), characterized in that the guides (3) for the movable welding plate (4) made in parallel and freely extending from the table (1) of the projecting bracket (6), the lower welding plate (4) being movably mounted on the guide rails (7) of the brackets (6) with elongated sections (8) and between them bridges (9). High frequency welding device according to claim 1, characterized in that the sections (8) run parallel to each other and at a distance that determines the bundle spacing (A) between the covers (B) of the notebook (C) while defining the bridges ( 9) welding fields, ie the length and width of the individual bundles (A) at their fold and the number of bridges (9) the maximum number of bundles (A) provided for each bundle. High-frequency welding apparatus according to claim 1, characterized in that the upper pressure welding plate (5) contains a welding field pattern that fits the pattern of the bridges (9), in addition to which it may have additional sampling.