Upper-blowing type film blowing machine for high-pressure film

Abstract

The invention discloses an upper-blowing type film blowing machine for a high-pressure film. The film blowing machine comprises a film blowing device, wherein the film blowing device comprises a fixedfeeding lower section, a connecting rotating disc, a discharging die head and a film blowing cooling mechanism; the fixed feeding lower section comprises a feeding inner core and a feeding heating sleeve, feeding inner core discharging ports are formed in the upper end of the feeding inner core, and feeding inner core feeding ports are formed in the lower end of the feeding inner core; the connecting rotating disc comprises a fixed disc body and a rotating disc body; the discharging die head comprises a discharging fixing inner core, a rotating sleeve and a discharging heating sleeve, whereinthe discharging fixing inner core is connected to the fixed feeding lower section, the rotating sleeve is connected with a rotating mechanism, discharging die head feeding ports are formed in the lower end of the portion between the rotating sleeve and the discharging fixing inner core, annular discharging ports communicating with the discharging die head feeding ports are formed in the upper endof the portion between the rotating sleeve and the discharging fixing inner core, and the discharging die head feeding ports correspondingly communicate with the feeding inner core discharging ports;and the film blowing cooling mechanism comprises an air supply device, air supply pipelines and an air ring. According to the upper-blowing type film blowing machine for the high-pressure film, thinfilm bags produced by the upper-blowing type film blowing machine are more uniform in thickness and better in texture, and the mechanical structure is reasonable in arrangement.

Description

technical field [0001] The invention relates to the field of film blowing machines, in particular to a multi-layer co-extruded top-blowing film blowing machine. Background technique [0002] High-pressure film bag is also called PE film bag. The production of PE film bag is to melt PE plastic particles, extrude the film bubble through the discharge die, blow it into a film, and then pull it into a tube. Existing film blowing machines include up blowing type and down blowing type. The height of the die head of the down blowing type is set lower, and the length space for pulling out the film bubble is small, which is not conducive to the cooling of the film and the blowing of the film. Otherwise, it will cause sticking of the coiled film, and it will also cause uneven thickness of the film. There is also a down-blown mechanical structure setting. This kind of production method in which heavy parts such as the die head and feeding equipment are set on the top There are problem...

AI Technical Summary

Problems solved by technology

Existing film blowing machines include up blowing type and down blowing type. The height of the die head of the down blowing type is set lower, and the length space for pulling out the film bubble is small, which is not conducive to the cooling of the film and the blowing of the film. Otherwise, it will cause sticking of the coiled film, and it will also cause uneven thickness of the film. There is also a down-blown mechanical structure setting. This kind of production method in which heavy parts such as the die head and feeding equipment are set on the top There are problems such as unreasonable equipment layout and inconvenient installation of mechanical equipment. However, for the up-blowing film blowing machine, the film bubble can be pulled out vertically to a higher distance, which is conducive to the cooling and blowing of the film. , the mechanical structure layout is also relatively reasonable. At present, the existing blown film blowing machine usually includes a melt feeding device, a die head, an air ring and a coiling mechanism. During production, plastic rice is poured into the melt feeding device and passed through It is melted and conveyed to the die for extrusion, and the film bubble is pulled out. At the same time, the wind ring blows to the wall of the film bubble so that the film reaches the thickness and diameter of the film bag to be produced. However, the existing blown film of this type The overall thickness of the film bag produced by the machine is uniform, fine production, texture and other issues still need to be improved

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