Ventiduct structure for membrana packing shrinking apparatus

Abstract

The invention discloses an air duct mechanism which is in a membrane-bag contraction device and which can ensure that the hot air blows from an air outlet evenly and smoothly. The device comprises an inner bladder and an outer bladder which are sleeved together, four mutually communicated cavities of an upper cavity, a lower cavity, a right cavity, and a left cavity are arranged between the inner bladder and the outer bladder, the front openings and the rear openings of the four cavities are sealed by an outer casing sleeved outside the outer bladder, the top wall of the inner bladder is provided with an air inlet, the top wall of the outer bladder is provided with a circulation fan, the impeller of the circulation fan is positioned in the upper cavity, the impeller is corresponding with the air inlet, the left cavity and the right cavity positioned at the two sides are respectively provided with heating bars, the two side walls and the bottom wall of the inner bladder are provided with air outlets which are evenly arranged, and a plurality of guide baffles which respectively extend to the left cavity and the right cavity are arranged in the upper cavity and around the circulation fan. The invention can cause the thin-film covering the pack-goods surface to be evenly heated and contracted, and closely nestled against the pack-goods surface, so the packing quality can be increased.

Description

technical field [0001] The invention relates to a film bag shrinking device, in particular to an air channel structure in the film bag shrinking device. Background technique [0002] In the film bag industry, the packaging is usually packaged with PE, POF and other films, and then the film-coated packaging is placed in the shrinking channel of the film bag shrinking device, and the film is shrunk with hot air to make it close on the packaging. The air duct used to generate hot air in the current film bag shrinking device has a structure including: inner and outer bladders that are set together, and a return chamber composed of four chambers, upper, lower, left, and right, is arranged between the inner and outer bladders. There is a zigzag air exhaust channel, the top wall of the inner tank is provided with an air inlet, the upper chamber is provided with a circulation fan corresponding to the air inlet, and the left and right chambers on both sides are respectively provided...

AI Technical Summary

Problems solved by technology

The air duct with this structure, because the hot air from the exhaust outlet is not uniform and straight, makes the shrinkage effect of the film not good, especially for the sleeve-type packaging form, the main problem is that the shrinkage of the soft bottle is not tight, and the packaging material The bottom does not shrink or shrinks insufficiently, the shape of the side shrinkage hole is not round or irregular, and the side and bottom are wrinkled, etc., which will affect the packaging quality

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