Plastic film production process

Abstract

The invention provides a plastic film production process. According to the plastic film production process, a base plate, a mounting rack, two widening devices, two pressing devices, a driving motor,cooling rollers and a cutoff device are used in cooperation to complete operation. Through the plastic film production process, the problems that foam films formed by blow molding are different in thickness, it is hard to obtain the foam films with the uniform thickness through double rollers after one-time pressing, the blow molded foam films have a certain viscosity due to the temperature, the foam films can be still likely to adhere to common rollers when the common rollers conduct pressing on the foam films, the pressed foam films are pulled and torn by the rotating rollers accordingly, the shaped foam films are likely to get loose during transportation and can hardly be cut effectively, and the flatness of the edges of the cut foam films is reduced can be solved.

Description

technical field [0001] The invention relates to the technical field of plastic film production, in particular to a plastic film production process. Background technique [0002] Plastic film is a film made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins. It is used for packaging and as a coating layer. It is widely used in food, medicine, chemical and other fields. In the process of plastic film production, it is necessary to shape and cut the blown bubbles. Traditional shaping and cutting usually use double-roller rotation to suppress the passing bubbles and flatten their thickness by extrusion. , so as to play the role of widening, and then cut the film bubbles in transport, but this method often encounters some problems: [0003] 1. Due to the different thickness of the bubble after blow molding, it is difficult to press the thickness evenly by double-roller pressing, and because the bubble after blow molding has a certain viscosity due t...

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Problems solved by technology

[0005] In order to solve the above problems, the present invention provides a plastic film production process, which can solve the problem that due to the different thickness of the bubbles after blowing, it is difficult to uniform the thickness at one time by double-roller pressing, and because the thickness of the bubbles after blowing Because the temperature has a certain viscosity, when ordinary rollers press it, the two may still stick after rolling, which will cause the pressed film bubble to be pulled and torn by the rotating roller. The film bubbles may be loose during transportation, it is difficult to form an effective cut when cutting them, and the flatness of the edge of the cut film bubbles is reduced, etc.

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