Roll changing device of film blowing machine

Abstract

The invention relates to the technical field of film winding equipment, and particularly discloses a roll changing device of a film blowing machine. The roll changing device comprises a rack, a workbench and a winding roll. The winding roll comprises two half rolls. Two supports are connected to the workbench in a sliding manner. The two half rolls are rotationally connected to the different supports. The rack is provided with a drive piece for driving the supports to slide. Each support is provided with a motor for driving the winding roll to rotate. A cavity is formed in each of the two half rolls. The two half rolls are in sliding connection with each other. Each half roll is provided with a plurality of air holes. The rack is provided with an adsorption piece. An adsorption hole is formed in an end of one half roll. The adsorption piece is connected with the adsorption hole through a pipeline. By the scheme, negative pressure is utilized for acting in a gap formed between a paper barrel and the winding roll, and therefore in the process that the winding roll winds a film, the paper barrel cannot slide left and right and cannot bounce in the radial direction on the winding roll, and the winding quality is improved.

Description

technical field [0001] The invention relates to the technical field of film winding equipment, in particular to a roll changing device of a film blowing machine. Background technique [0002] The film blowing machine is a kind of equipment used to produce plastic film. The plastic film needs to be rolled up from blowing out to forming a roll. The film is mainly supported by a paper tube, and the winding device is used for automatic winding. Every After the film wound on the secondary paper roll reaches the specified thickness, the paper roll needs to be replaced. Currently, the replacement methods mainly include manual, semi-manual or automatic methods. [0003] Among them, although the automatic roll changing is convenient and fast, labor-saving, but the cost is too high, and it needs to be completed by expensive precision equipment. For small and medium-sized enterprises, the cost investment is too high, so at present, a semi-manual method is mostly used. For example, the ...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a roll changing device of a film blowing machine to solve the problem in the prior art that the paper tube is taken out from the half roll by sliding. There needs to be a gap between the half roll and the roll, but this will cause the problem of sliding left and right or radial jump of the paper tube during the winding process

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