Polypropylene bidirectional stretching film production line

A biaxially stretched film and polypropylene technology, applied to flat products, household appliances, and other household appliances, can solve the problems of reduced filtration efficiency, secondary pollution, and easy aging, so as to avoid material backflow and facilitate removal and replacement. Reduce residual effects

CN111660456AInactive Publication Date: 2020-09-15胡云垒
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-09-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of polypropylene film production, and particularly relates to a polypropylene bidirectional stretching film production line. The polypropylene bidirectional stretching film production line comprises a sealing cover, an outer cylinder, connecting pipes, a buffering spring and a filtering cylinder; the buffering spring is fixed to the inner bottom of theouter cylinder; the filtering cylinder is fixed to the upper end of the buffering spring; and a material inlet is formed in the upper end of the side of the outer cylinder. According to the polypropylene bidirectional stretching film production line, the sealing cover with a pressing plate is arranged, the pressing plate is descended by pressing a guide rod downwards; the pressing plate presses the filtering cylinder downward; the filtering cylinder is descended; the filtering cylinder is rebounded upwards under the action of the elastic force of the buffering spring, which makes impurities inthe filtering cylinder fall off, and avoid blockage that affects the filtering efficiency; the sealing cover is opened; the filtering cylinder extends out upwards under the action of the elastic force of the buffering spring, which facilitates withdrawing and replacing; the connecting pipes are connected between each of the material inlet and a material outlet of the outer cylinder; and each connecting pipe is in an structure that one end close to the outer cylinder is inclined upward, so that the materials in the material inlet and the material outlet are prevented from refluxing into the filtering cylinder to cause inconvenience in the replacement of the filtering cylinder.
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Description

technical field

[0001] The invention belongs to the technical field of polypropylene film production, and in particular relates to a polypropylene biaxially stretched film production line. Background technique

[0002] Polypropylene is a thermoplastic resin produced by the polymerization of propylene. According to the arrangement of the methyl group, it can be divided into three types: isotactic polypropylene, atactic polypropylene and syndiotactic polypropylene.

[0003] When the methyl groups are arranged on the same side of the molecular main chain, it is called isotactic polypropylene. If the methyl groups are arranged randomly on both sides of the molecular main chain, it is called atactic polypropylene. When the methyl groups are arranged alternately on both sides of the molecular main chain, it is called interstitial polypropylene. Regular polypropylene. In the polypropylene resin produced in general industry, the isotactic structure content is about 95%, and the re...

Examples

Embodiment approach

[0024]As an embodiment of the present invention, a group of limit blocks 9 are fixedly connected equidistantly to the side wall of the bottom of the outer cylinder 2; Bottom contact. When the present invention is used, the rebound distance of the buffer spring 6 is too long after excessive compression, which will affect the stability of the filter cartridge 7, and also cause excessive wear between the filter cartridge 7 and the outer cylinder 2, so through the side of the outer cylinder 2 bottom The limit block 9 arranged on the wall can limit the descending distance of the buffer spring 6, avoiding the excessive compression of the buffer spring 6 times, and then making the rebound time of the buffer spring 6 short, and the frequency of vibration is high, which further enhances the filter performance. The cleaning effect of impurities on the cartridge 7 greatly prolongs the effective working time of the filter cartridge 7.

[0025] As an embodiment of the present invention, t...