DE2452425A1 - Applying a plastics, esp upholstered, covering onto a support - by HF welding foils of different colours and surface characteristics together - Google Patents

Abstract

Applying plastics covering(s), esp. upholstered covering, to a support, comprises HF welding together, with the use of electrodes, plastics foils which differ from one another in colour and/or surface characteristics. A foil to be applied to another one is roughly trimmed, placed onto the other foil and the excess margin is then mechanically trimmed off during the welding-together step. The "excess margin" is defined as the edge of the foil to be applied that protrudes over the electrode. No need for time-consuming positioning of an accurately dimensioned section of foil. The final trimming during the welding step is easy because the foil is then in a plastic, severable state. The resulting edge is, after cooling and solidification, clean and true to the desired contour.

Description

Ancestors for applying plastic coverings, especially upholstered Coverings on a carrier The invention relates to a method for applying Plastic coverings, in particular padded coverings on a carrier, where appropriate Different in color and / or surface o Foils made of plastic by high-frequency welding be connected to each other using electrodes.

To. A precisely cut film is used to produce applied coverings placed on another foil and aligned exactly according to the welding tool contours, before the actual welding process can be carried out. Especially with in The color and surface of the foils have to be very different, the cut and the positioning match exactly. The more precisely this correspondence is carried out, the better Quality can be achieved. However, this requires a considerable amount of time.

The style demands narrow weld seams with only minor inaccuracies cover. Such work is particularly problematic when used of shrink films.

The object of the invention is to address the difficulties and Avoid disadvantages ru.

This object is achieved according to the invention in that the to be applied Roughly stretched film is placed on the other film and during the welding process the edge of the film to be applied protruding beyond the electrode with mechanical Funds is deducted.

This method has the advantage of being time-consuming and accurate Positioning of a precise cut, which is expensive per se, is not required. Of the The rough cut is placed on the other film in such a way that it is more or less protrudes beyond the welding electrode. Pulling off the protruding part of the electrode Edge can go on without difficulty during the welding process because the film is in a plastic state along the weld seam. This one goes without much scatter in the solid state, so that the edge is sharp and tears true to the contour. Mechanical means such as e.g. Pincer grippers or pneumatic suction heads.

Furthermore, when processing padded coverings or from Foam-provided foils generate a gas pressure acting from the outside inwards will.

By sucking off the air in the foam, for spatial reasons often difficult to accommodate mechanical hold-down devices partially or completely omitted. The entire system becomes simpler and clearer.

The invention is to be explained in more detail on the basis of an exemplary embodiment will.

The figure shows schematically an application process during manufacture padded coverings.

On a base plate 1 designed as a counter electrode, which has a Line 2 e.g. with a vacuum generator, not shown tied together a carrier 3, e.g. made of cardboard, is placed.

The carrier 3 can be gas-permeable. If not, will this perforated at the inlet 4 of the line.

The padding material 5, such as foam, is placed on the carrier 3 laid out and over it the film (covered.

The film 7 to be applied is roughly cut and cut accordingly Position to the electrodes 8 spread on the film 6. Then in the cushioning material 5 generates a syrup that acts from the outside to the inside. During the the subsequent welding process that protrudes beyond the electrode 8 Edge 9 and 10 by mechanical means (e.g.

Pincer grippers or pneumatic suction heads, etc.) 11 and 12 detected and deducted. This peeling is easy to do because it is in the weld plasticized film is soft and changes to the solid state without a large scatter value. The cutting point is therefore smooth and sharp and coincides with the weld seam contours. Of course, hold-down devices are also used in special cases will.

Claims (2)

Expectations Method for applying plastic coverings, especially upholstered Deposits on a carrier, possibly different according to color and / or surface Plastic foils by high frequency welding using electrodes are connected to one another, characterized in that the film to be applied roughly cut and placed on the other film and during the welding process the edge of the film to be applied over the electrode with mechanical Funds is deducted. 2. The method according to claim 1, characterized in that in the Processing of padded coverings or foils provided with foam gas pressure acting from the outside in is generated.