Welded heating device

Abstract

The invention relates to a welded heating device. The welded heating device disclosed by the invention comprises a fixing piece, a bracket, an adaptive piece, a lower pressure supporting piece, a heating wire, two tension pieces, multiple springs, a driving part and a controller. The fixing piece is fixed on the bracket; the adaptive piece is arranged in parallel relative to the fixing piece; thelower pressure supporting piece and the adaptive piece are connected by the multiple springs; the driving part is fixed on the lower pressure supporting piece; the driving part is fixed on the bracketand drives the lower pressure supporting piece to reciprocate; the two tension pieces are respectively fixed at two ends of the lower pressure supporting piece; the heating wire is tensioned by the two tension pieces; and the controller controls the movement of the driving part and power on-off of the heating wire. The welded heating device disclosed by the invention has the advantages of being excellent in film heat sealing effect and neat.

Description

technical field [0001] The invention relates to a heat sealing device, in particular to a welding heating device. Background technique [0002] When film packaging is used, the double-layer film is usually heat-sealed, and the film is heated by a high-temperature heating wire to melt and then bond together. When packing the mattress, the film needs to be heat-sealed, and then the mattress is tightly wrapped in the film. The existing heat-sealing device for mattress packaging film is usually a heating wire, and then the two ends of the heating wire are tightened by a bracket. When heat-sealing, the bracket and the heating wire are lowered together, and the film is pressed against the bottom plate. On, the heating wire heats and melts the film, and then heat seals the film tightly. Since the width of a single side of a mattress is usually greater than 1m, especially for a large mattress, the length of a single side exceeds 2m. When heat sealing such a large mattress, the len...

AI Technical Summary

Problems solved by technology

But in practice, the base plate of aluminum alloy is deformed due to the processing technology or the effect of thermal expansion and contraction, and the contact surface will have a slight concave-convex structure, which will make the contact surface uneven

Such a structure cannot stick the film tightly to the bottom plate when the heating wire is heat-sealed, and there will be some over-welding and some unwelding, which will affect the sealing effect of the film

This phenomenon is not obvious at the beginning of the device's use, but it will become obvious after long-term use, and at this time the bottom plate usually needs to be replaced

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