Multi-roller continuous plastic sheet calender

Abstract

The invention relates to a multi-roller continuous plastic sheet calender. The multi-roller continuous plastic sheet calender comprises machine frame walls and a roller assembly; the roller assembly comprises inclined surface conveying rollers and horizontal conveying rollers; the inclined surface conveying rollers are installed on the feeding end inclined surfaces of the machine frame walls and comprise at least two rollers; the horizontal conveying rollers are horizontally installed at the tops of the machine frame walls and comprise at least three rollers, and roller interval adjusting devices are arranged between the rollers; and electric walking devices are installed at the bottoms of the machine frame walls. According to the multi-roller continuous plastic sheet calender, the multiple rollers are continuously arranged, the roller quantity is increased, the contact area between the rollers and a sheet is effectively increased, the time for the rollers to make contact with the sheet is prolonged, thus, the sheet can be cooled and formed better, meanwhile, the inner stress of the sheet is reduced, the surface quality of the sheet is improved, and the multi-roller continuous plastic sheet calender is suitable for high-output production of plastic sheets.

Description

technical field [0001] The invention relates to the technical field of plastic processing, in particular to a calender for extrusion molding of multi-roll continuous plastic sheets. Background technique [0002] At present, most of the calenders used in domestic plastic sheet extrusion molding are three-roll calenders, and the raw materials used in production are mainly PET, PP, PVC, etc. The process used in the sheet production line is: the raw materials are extruded by the extruder , Plasticized, melted, extruded from the mold, extruded by a three-roller calender, cooled and formed. [0003] However, the demand for high output is increasing in the market now. However, after the output is high, it is difficult for ordinary three-roll calenders to lower the temperature of the sheet. Therefore, the demand for high output of ordinary three-roll sheet calenders is Insufficient cooling during production and uneven heating of the upper and lower sides of the sheet will easily af...

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Problems solved by technology

[0003] However, the demand for high output is increasing in the market now. However, it is difficult for ordinary three-roll calenders to lower the temperature of the sheet after the output is high. Therefore, the demand for high output of ordinary three-roll sheet calenders is Insufficient cooling during production and uneven heating of the upper and lower sides of the sheet may easily affect the quality of the sheet

In order to achieve a sufficient cooling effect for the calender, the contact area between the sheet and the roller must be increased, and the contact time between the sheet and the roller must be prolonged, and the solution is to increase the diameter of the roller and increase the length of the roller, but Increasing the diameter and length of the roller will degrade the quality of the plastic sheet product, and it is also inconvenient to operate the machine

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