Electric heating element, softening device and control method thereof

Abstract

The application discloses a softening device (200) for softening the outer insulating skin of an elongated electric heating element (121), in particular a metal electric heating wire, to be sewn ontoa mat, in particular a car seat or backrest, The softening device (200) comprises a body (210) provided with an air supply passage and a material supply passage (211), and further provided with an open cavity (213). Hot air can be supplied through the air supply passage. The elongated electric heating element (121) can be supplied through the material supply passage (211). The air supply passage and the material supply passage (211) are isolated from each other and lead to the open cavity (213). The electric heating element (121) is discharged from the body (210) after passing through the material supply passage (211) and the open cavity (213). The application also discloses an electric heating element (121), a sewing apparatus using the softening device, and a control method of the softening device.

Description

technical field [0001] The present application relates generally to sewing equipment for electric heating elements, in particular electric heating elements such as metal electric heating wires employed in automotive heating mats, and also generally to devices employed in such sewing equipment for making said A softening device for softening an electric heating element and a control method thereof. Background technique [0002] In the production process of the car heating pad, it is necessary to sew the metal electric heating wire to the base material of the car seat cushion in a predetermined pattern. Metal electric heating wires are usually covered with insulation. In order to improve the heating capacity of the car heating pad, the metal electric heating wire is sewn onto the substrate in a higher density pattern. Because the material used to make the insulating skin is usually relatively hard, this causes the metal electric heating wire to repeatedly bend at relatively ...

AI Technical Summary

Problems solved by technology

Because the material used to make the insulation is usually relatively hard, this causes the metal electric heating wire to bend repeatedly at a relatively sharp angle on the base material

In the case of a particularly dense pattern, it is likely to cause the insulation skin of the metal electric heating wire to break, and it is prone to failures such as short circuit during use and reduced product life.

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