Double-film inflated bag and manufacturing method thereof

Abstract

The invention discloses a double-film inflated bag and a manufacturing method thereof. The inflated bag comprises upper cylinder film and lower cylinder film which are aligned and superimposed; the upper cylinder film and the lower cylinder film are each of a double-film structure composed of an upper film piece and a lower film piece; the peripheries of the upper cylinder film and the lower cylinder film are aligned and welded together, and a ring of welding side is formed at the peripheries of the upper cylinder film and the lower cylinder film; the lower film piece of the upper cylinder film and the upper film piece of the lower cylinder film form an inner bag body of the double-film inflated bag; the upper film piece of the upper cylinder film and the lower film piece of the lower cylinder film form an outer bag body of the double-film inflated bag; and a valve hole is formed in the upper cylinder film, and a one-way air valve is mounted in the valve hole. According to the double-film inflated bag and the manufacturing method thereof, on the premise that existing production equipment is not changed, the manufacturing technology steps of the double-film inflated bag can be greatly optimized, a large number of tedious operating steps are omitted, the production efficiency is greatly improved, manual operation is greatly reduced, and in addition, since the material is simplex,environment-friendly recovery of products is better facilitated.

Description

technical field [0001] The invention relates to the technical field of air bag production, in particular to a double-membrane air bag and a manufacturing method thereof. Background technique [0002] Most of the finished products of inflatable bags are composed of inner bag, outer bag and air valve. Wherein, the outer bag is made of plastic woven cloth covered with a film. Some outer bags also need to be covered with a layer of kraft paper, its main function is to increase the strength and appearance, and it is necessary to cut and iron a round hole on the outer bag so that the air valve on the inner bag can pass through. [0003] Among them, the production process of the inner bag is as follows: figure 1 with 2 As shown, two upper and lower single-layer plastic films are required, and after steps such as side welding, air valve welding and sealing welding at both ends, a closed square air chamber of different specifications is finally formed. [0004] It can be known fr...

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Problems solved by technology

[0004] It can be known from the above introduction that the existing air bag manufacturing process includes: inner bag making, outer bag cutting and ironing round holes, inner and outer bag fitting, sewing, pressing in the air valve handle and other steps, the operation process is cumbersome, especially in use When the requirements for working air pressure are not high, it is a waste of man-hours and materials

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