SU1344619A1 - Electrode for welding and cutting thermoplastic materials - Google Patents

Abstract

The invention relates to the welding and cutting of thermoplastic materials, in particular to electrodes for welding polyethylene bags. The purpose of the invention is to simplify the design, increase reliability by using an electrical wire as a electrode in PTFE insulation. When the ends of the electrode are connected to a voltage source, it is heated, and when it is pressed against a plastic bag, the package is welded. 2 Il. from 4 4 about:

Description

The invention relates to the welding and cutting of thermoplastic materials and can be used in welding, for example, plastic bags.

The aim of the invention is to simplify the design, increase reliability by using electrical wire in fluoroplastic insulation, such as mounting or winding, as an electrode for welding and cutting thermoplastic materials.

Such electrical wires are widely known, for example wire PEF-1, PEF-2.

FIG. 1 schematically shows a welding device based on the use of electrode 2. The electrode 2 is heated for a specified time and its thermal elongation compensated by the spring-loaded plunger 4 and the process

g melting and welding of the package 5. Breaker 8 breaks the electrical circuit and maintains the package under pressure until the welding point is cooled. Then the base 1 with the welded electrode is raised. Moreover, as a result of poor adhesion of polyethylene

10 to the fluoroplastic otlichanie package 5 from the electrode. The weld formed in the contact sheet has the appearance of a scar of the same section length. Its quality is determined by the temperature

tric wire as an electrode; . of electrode 2, by pressing down base i in fig. 2 is a section A-A in FIG. 1. and the elasticity of the pad 6. The width of the rubbing on the textolite base 1 —the electrode 2 is fixed from one or more (see. FIG. 2) nichrome wires in the fluoroplastic insulation 3. One end of the tensioned electrode is fixed and the other on a spring-loaded plunger 4 A welded plastic bag 5 is laid on an electric cushion 6 lying on a table 7. Both ends of the electrode are connected to a voltage source with a switch 8.

When the base 1 with the welding electrode 2 is pressed, to the bench 5 on the pad 6 and the table 7, pack 5 with the help of a switch 8, a voltage is applied to the electric

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This is determined by the geometry and number of electrode wires. If necessary, the proposed electrode as a thermal knife, you can cut many thermoplastic materials - from plastics to soap and butter. The material to be cut and the electrode are not contaminated. This reduces gassing.

Claims (2)

Invention Formula Use of electrical wire in PTFE insulation as an electrode for welding and cutting thermoplastic materials. trod 2. For a specified time, the electrode 2 is heated and its thermal elongation, compensated by the spring-loaded plunger 4, as well as the process melting and welding of the package 5. Breaker 8 breaks the electrical circuit and maintains the package under pressure until the welding point is cooled. Then the base 1 with the welded electrode is raised. Moreover, as a result of poor adhesion of polyethylene To the fluoroplastic, the package 5 is detached from the electrode. The weld formed in the contact sheet has the appearance of a scar of the same section length. Its quality is determined by the temperature electrode 2, pressing down the base i and the elasticity of the pad 6. Width This is determined by the geometry and number of electrode wires. If necessary, the proposed electrode as a thermal knife, you can cut many thermoplastic materials - from plastics to soap and butter. The material to be cut and the electrode are not contaminated. This reduces gassing. Invention Formula Use of electrical wire in PTFE insulation as an electrode for welding and cutting thermoplastic materials. eight Editor M. Bandura Order 4571/19 fig 2 Compiled by I. Frolova Tehred and; VeresKorrektor S. Cherni Circulation 564Subscribe VNIIPI USSR State Committee for Inventions and Discoveries 1 13035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul. Project, 4