High-precision temperature control film casting machine

Abstract

The invention discloses a high-precision temperature control film casting machine. A rubber roller, a patterned roller, a grinding roller, a first cooling roller and a second cooling roller are sequentially and rotationally supported on a rack from front to back, a rubber roller outer barrel is installed on a rubber roller end cover, a rubber roller semiconductor refrigeration barrel is laid on the inner barrel wall of the rubber roller outer barrel, the rubber roller outer barrel is provided with a flexible roller sleeve in a sleeving mode, two ends of the flexible roller sleeve are fixedly connected to roller sleeve supporting end plates at the corresponding ends respectively, end face cams are arranged on the inner sides of the roller sleeve supporting end plates, and cam rolling bodies installed on the roller sleeve supporting end plates are movably supported on the end faces of the end face cams; a patterned roller semiconductor refrigeration cylinder is laid on the inner cylinder wall of a patterned roller outer cylinder, a grinding roller cooling water cavity is formed between a grinding roller inner cylinder and a grinding roller outer cylinder, and the grinding roller cooling water cavity leads to a grinding roller end shaft water hole in a grinding roller end roller through a grinding roller end water hole in a grinding roller end cover. The casting machine not only can accurately control the temperature of the casting cooling roller, but also can control the transverse shrinkage phenomenon of a 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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