Assembly line equipment for producing hard PVC (polyvinyl chloride) sheets

Abstract

The invention discloses assembly line equipment for producing hard PVC (polyvinyl chloride) sheets. The PVC sheets produced by the assembly line equipment are uniform in thickness and high in transverse shrinkage rate. A calender is composed of six calendering rollers, and the arrangement mode of the six calendering rollers is a combination of a positive Z-shaped arrangement structure and a positive I-shaped arrangement structure from top to bottom. According to the method, a six-roller calender is adopted for calendering a PVC sizing material into a thin sheet, then circulating ice water is adopted for cooling stripping rollers in an initial-section cooling area behind the calender, so that the temperatures of all positions of the surfaces of the stripping rollers are uniform and consistent, and after the PVC sheet which is output from a discharging hole of the calender and is in a high-temperature state passes through the stripping rollers, the temperature of the formed PVC sheet in the width direction is uniform, so that the thickness consistency of the PVC sheet in the width direction is improved. Through the rigidity improving section subjected to ice water cooling treatment, the PVC sheet penetrating through the initial section cooling area and the rigidity improving section is subjected to rapid cooling stimulation, and the transverse shrinkage rate is effectively increased.

Description

technical field [0001] The present invention is a divisional application, and the original application information is: the filing date of the original application is: February 4, 2021; the application number is 202110156468.X; the name of the invention is: "Environmental protection ultra-thin rigid PVC sheet and its assembly line Production equipment". [0002] The invention relates to a production equipment for rigid PVC sheets, in particular to an assembly line equipment for producing rigid PVC sheets with good plastic absorption effect. Background technique [0003] PVC (Chinese name: polyvinyl chloride) is easy to process, and can be processed by molding, lamination, injection molding, extrusion, calendering, blow molding, etc. PVC is mainly used in the production of plastic soft products such as artificial leather, film, wire sheath, water supply pipes, household pipes, house wall panels, commercial machine shells, electronic product packaging, medical equipment, food ...

AI Technical Summary

Problems solved by technology

[0005] In the existing technology, the equipment for producing PVC sheets is not in place in the process of calendering, heat preservation and cooling after calendering, which often leads to uneven transverse thickness of the produced sheet, large surface flow lines, and thick products. At the same time, it is difficult to control the transverse and longitudinal shrinkage rates well, the subsequent processing range is narrow and the rigidity of the sheet is not good

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