Blown film device with melt pump

Abstract

The invention discloses a blown film device with a melt pump. The device comprises an extruder, a motor, a splitter plate, an extruder connecting body, a melt pump assembly, a pressure sensor, a machine head connecting body and a film blowing machine head, wherein the melt pump assembly serves as the core of the blown film device provided by the invention, the blown film device comprises a support, a gear pump, a mounting plate, a universal coupling, a speed reducer and a motor. The melt pump assembly is connected with the extruder through the extruder connecting body, and is connected with the film blowing machine head through the machine head connecting body, the pressure sensor is mounted at the top of the melt pump assembly, the splitter plate is mounted at the outlet of the extruder and connected with the extruder connecting body, the motor is connected with the extruder, and power is provided for the entire device. The device can stable a plasticizing process, lower the melting temperature, improve product yield and quality, and further prolong the service life of the extruder.

Description

technical field [0001] The invention belongs to the field of plastic molding processing equipment, and relates to a film blowing device with a melt pump. Background technique [0002] There are usually four production methods of plastic film, namely: calendering method, extrusion method, stretching method and casting method. Among them, the extrusion method is composed of blow molding method and extrusion molding method. [0003] Blown film forming equipment and devices include extruder, head and die, cooling device (air ring or water cooling system), herringbone plate, traction roller, curling device, etc. [0004] The process of producing plastic film by blow molding is: firstly, the plastic raw material is added to the extruder to make it melt and plasticized, and then extruded through the ring die of the machine head (mold) to form a thin-walled tube blank, and then to the tube blank Inflate compressed air to make it blow up to the required thickness and width, and fina...

AI Technical Summary

Problems solved by technology

[0006] However, compared with other plastic film forming methods, especially compared with extruded film forming methods, the blow molding method has low output, poor thickness uniformity of film products, and high requirements for extruders (requires extruders to melt and plasticize and conveying process, to establish the pressure required for blow molding) and other issues, thus limiting its wider application and development

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