SU1456322A1 - Apparatus for welding polymeric materials - Google Patents

Abstract

The invention relates to the field of welding of polymeric materials, namely thermoplastic films. The goal is to increase the performance and quality of the welded joint. For this, the tape heating element is located between the ends of the elastic substrates flush with them and is made with heat sinks placed under the substrates. During welding, elastic substrates squeeze the material at the welding site. After welding, heat is removed by heat sinks and substrates. 2 Il.

Description

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The invention relates to the welding of polymeric materials, in particular, to a device m for welding thermoplastic films.

The purpose of the invention is to increase the productivity and quality of the welded joint.

FIG. 1 shows a device in cross-section; in fig. 2 - heating element, top view.

The device comprises a lower stop 1, on which the substrates 2 are placed. The tape heating element 3 is located between the ends of the elastic substrates 2 so that its heating cutting edge is flush, i.e. in the same plane as the surface of the elastic substrates 2, and the heat sinks, the radiator 4 of the heating element 15, are located under the elastic substrates 2. The upper support 5 on the side of the heating element 3 is lined with an elastic substrate 6.

The device works as follows.

Polymer films 7 and 8, superimposed one on another, are placed on elastic substrates 2, which are fixed on

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lower stop 1. In this case, the heating element 3, located between the ends of the elastic substrates 2, is also fixed on the lower stop 1.

After that, the upper abutment 5, lined with an elastic substrate 6, creates pressure on the materials to be welded and the heating element 3 is subjected to heating.

When heated to the required temperature and a certain pressure is reached, the cutting edge of the heating element 3 advances from the ends of the elastic substrates 2, which are subjected to elastic deformation, forces both welded materials and abuts against the elastic element of the upper stop 5, stops its advancement.

In this case, heating and melt formation occur in the polymer layers 3 adjacent to the heating element. The electrolyte substrates 2 and 6 squeeze the material to be welded both in the area of the melt produced and in the areas adjacent to this melt — two sanitary groundways are formed along both L

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The edges of the cutting edge of the heating element are 3, and the pressure created at the beginning of the process is kept constant. Thereafter, the heating element is cooled rapidly by heat sinks — a radiator, and the heat from the formed welds is removed by the heating element 3 and dissipated by the developed radiator surfaces. At the end of the formation and cooling of the welds, the pressure is relieved.

In this case, the upper surfaces of the elastic substrates 2, returning to the initial state, remove the films to be welded with the cutting edge of the heating element 3.

The proposed device allows welding with the opening of polymer films along a complex curved contour, while improving the quality of welding of polymer materials.

Claims (1)

The invention is a device for welding polymeric materials containing a tape heating element and elastic substrates, characterized in that, in order to improve the performance and quality of the welded joint, the tape heating element is located between the ends of the elastic substrates flush with them and made with heat sinks that are placed under these substrates. 8 6 I XX VQ noofSnn (хххххххххХХХХХХххХХХХХХХХХХХХХХХХ O. (Paa.i FIG. g