High-precision temperature-controlled film casting machine

Abstract

The invention discloses a high-precision temperature-controlled film casting machine. A rubber roller, a twisted roller, a frosted roller, a cooling roller 1 and a cooling roller 2 are rotatably supported on the frame from front to back, and the end cover of the rubber roller is equipped with The outer cylinder of the rubber roller, the inner wall of the outer cylinder of the rubber roller is covered with a rubber roller semi-conductor cooling cylinder, the outer cylinder of the rubber roller is covered with a flexible roller sleeve, and the two ends of the flexible roller sleeve are respectively fixedly connected to the roller sleeve supporting end plate at the corresponding end On the inner side of the supporting end plate of the roller sleeve, an end cam is arranged, and the rolling body of the cam installed on the supporting end plate of the roller sleeve is movably supported on the end surface of the end cam; The cooling cylinder, the grinding roller cooling water cavity is set between the grinding roller inner cylinder and the grinding roller outer cylinder, and the grinding roller cooling water cavity leads to the grinding roller end on the grinding roller end cover through the grinding roller end water hole on the grinding roller end cover Axis water hole. The casting machine can not only accurately control the temperature of the casting chill roll, but also control the transverse shrinkage of the casting film.

Description

technical field [0001] The invention relates to the field of film production equipment, in particular to a casting machine capable of accurately controlling the casting temperature and the uniformity of the casting film. Background technique [0002] Casting machine is a production equipment for making thermoplastic film by casting method. The molding process of extruding cast film is to melt and plasticize the film-forming raw materials through the extruder, extrude from the machine head through the slit of the mold, make the molten material close to the casting cooling roll, and then Under the action of roller traction and cooling, the molten material is stretched and cooled longitudinally to form a film, which is coiled into rolls after pre-trimming and thickness measurement. [0003] In the molding production process of cast film, whether the film thickness is uniform is an extremely important index to detect the quality of the film product. The uneven thickness of the ...

AI Technical Summary

Problems solved by technology

Due to the thermal properties of the extruded plastic itself, the melt cannot move uniformly and at the same speed. The speed change of the plastic melt will affect the distribution of the melt, thereby affecting the transverse thickness of the plastic film. The unreasonable fluctuation of the film forming temperature will also cause Affects the inconsistency of flow velocity and flow rate, resulting in uneven lateral thickness after film formation

The uneven thickness of the cast film is also related to the shrinkage phenomenon during the production process of the cast film. The thermal stretching of the melt cast film in the air will make the film narrow, and as a result, the edge of the film becomes thicker and shrinks, or wrinkles and The thicker the edge material, the greater the shrinkage, the thicker the edge insulation of the film, and the output of the product decreases with the increase of the thick edge material

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