Thermoplastic sealing device of plastic woven packaging bag

Abstract

The invention relates to the technical field of plastic woven bag sealing equipment, in particular to a thermoplastic sealing device of a plastic woven packaging bag. The thermoplastic sealing device comprises a rack, two third power telescopic cylinders which are symmetrically and horizontally arranged are fixedly connected to the rack, and a pressing plate is fixedly connected to the end part of a piston rod of each third power telescopic cylinder; the to-be-sealed end of the plastic woven bag is located between the two pressing plates, a vertically-arranged second power stretching cylinder is fixedly connected to the rack, a supporting block is fixedly connected to the bottom end of a piston rod of the second power stretching cylinder, and a nano-film electric heating plate is arranged at the bottom of the supporting block and is of a long-strip-shaped sheet structure; and when thermoplastic sealing is conducted, the nano-film electric heating plate is inserted into an area to be subjected to thermoplastic sealing in the plastic woven bag. According to the device, the thermoplastic sealing procedure is carried out in a manner of heating the inner wall of the plastic woven bag, two defects of traditional outer wall heating plastic sealing are avoided, the firmness of the sealing position of the plastic woven bag is improved, and the sealing quality is better.

Description

technical field [0001] The invention relates to the technical field of plastic woven bag sealing equipment, in particular to a thermoplastic sealing device for plastic woven packaging bags. Background technique [0002] Plastic woven bags are also called snakeskin bags. It is a kind of plastic bag, which is used for packaging. Its raw materials are generally various chemical plastic materials such as polyethylene and polypropylene, and the plastic woven bag sealing device is specially used for sealing and packaging plastic woven bags. Existing plastic woven bag sealing equipment generally makes the bag walls of plastic woven bags melt and adhere together through high temperature and high pressure. [0003] In the existing equipment, when the plastic woven bag is heated and sealed, the heating body is generally clamped outside the plastic woven bag, and then heated and pressurized for sealing. Since the heating body is in contact with the outer wall of the plastic woven bag,...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem in the prior art that the highest temperature part is located on the outer wall of the plastic woven bag during hot-melt plastic sealing, and the part where the thermoplastic is pasted is the inner wall of the plastic woven bag, resulting in poor sealing effect. Thermoplastic sealing device for plastic woven packaging bags

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