Pressurizing and tensioning stop gear of plastic bottle blowing machine

Abstract

The invention discloses a pressurizing and tensioning stop gear of a plastic bottle blowing machine. The pressurizing and tensioning stop gear comprises a rear template, a movable template, a front template and a fixed template on a rack of the bottle blowing machine, wherein a half mould A is mounted on the movable template; another half mould B is mounted on the front template; a pressurizing and tensioning mechanism is arranged on the fixed template, and comprises a pressurizing mainboard which is arranged on the inside wall of the fixed template; a clamping mechanism is connected with the pressurizing mainboard; the pressurizing mainboard is connected with the fixed template by a pressurizing pull rod; a spring chamber is arranged in the fixed template; a positioning ring is mounted at an opening of the spring camber; a pressurizing spring is arranged in the spring chamber; the pressurizing pull rod passes through the pressurizing spring; a pressurizing cavity is arranged between the pressurizing mainboard and the fixed template; a pressurizing piston plate is arranged in the pressurizing cavity; an air vent is formed in the fixed template, is communicated with the pressurizing cavity and is externally connected with an air source.

Description

technical field [0001] The invention relates to a pressurized tension limit mechanism of a plastic bottle blowing machine, which belongs to the field of plastic machinery. Background technique [0002] Plastic hollow containers, such as mineral water bottles, oil bottles and beverage bottles, are produced by injection stretch blowing process. The preform is put into a mold for stretch blow molding. After the plastic preform is put into the mould, the mold is first closed, and then the stretching mechanism works, and the pull-up rod is inserted into the heated and softened plastic preform to stretch the plastic preform, and finally it is blown and shaped. The mold described is two half-half molds, one mold is installed on the moving platen of the bottle blowing machine, and the other mold is installed on the fixed platen, and the mold opening and closing cylinder of the bottle blowing machine passes through the opening and closing mold locking transmission mechanism. Drive ...

AI Technical Summary

Problems solved by technology

In actual production, multiple mold cavities may be opened in one pair of molds, that is, once a multi-mode mold is produced, the volume of the mold is large, and the required opening and closing pressure is greater, especially after the mold is used for a long time, the two It is easy to produce small gaps between the molds, even if the pressure of the mold opening and closing cylinder is increased, it cannot be completely eliminated, which will affect the quality of the bottle, and if the mold is replaced, the cost will be very high

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