Stretching mechanism of bottle blowing machine

Abstract

Provided is a stretching mechanism of a bottle blowing machine. The stretching mechanism of the bottle blowing machine comprises a sealed cylinder mounting plate and a plurality of sealed cylinders arranged on the sealed cylinder mounting plate. A base plate is connected below the sealed cylinder mounting plate through a guide post, a movable plate capable of sliding freely on the guide post is arranged between the base plate and the sealed cylinder mounting plate, stretching rods are inserted in the sealed cylinders in a penetrating mode and connected with the movable plate, and a shearing mode hinge mechanism pushed by a power source is hinged between the movable plate and the base plate. The shearing mode hinge mechanism is in an X shape formed by the center points of two hinge arms in a hinge joint mode, and two ends of each hinge arm are hinged with the base plate and the movable plate through connecting rods. The stretching mechanism of the bottle blowing machine has the advantages of being simple in structure, fast and uniform in stretching speed, short in power source stroke, high in production efficiency, good in product quality and the like.

Description

technical field [0001] The invention relates to a plastic bottle blowing mechanical device, in particular to a stretching mechanism of a stretch blow molding machine. Background technique [0002] Plastic hollow containers such as cola bottles and mineral water bottles use injection molding to manufacture preforms. The entire working line of the blow molding machine is to transfer the preforms to the preform mounting end of the preform holder, and then heat or preform the preforms. Heat, then stretch and blow, and finally the formed bottle is unloaded from the blow molding machine. Among them, stretching and bottle blowing are a process of precise mutual adaptation. Compared with stretching, high-pressure gas entering the preform too late or too early will affect product quality. At the same time, in order to improve efficiency, there are often multiple blowing stations on a pair of molds, and each station consists of a cavity and a stretching rod. In the prior art, the st...

AI Technical Summary

Problems solved by technology

In the production process, limited by the structure of the cylinder itself and its working characteristics, the movement speed of the cylinder during work is actually uneven, sometimes fast and sometimes slow, and even vibrating to push the stretching rod, resulting in vibration marks on the surface of the produced product. Disadvantages such as uneven thickness of bottle wall

Even in some deep preform stretching, the stroke of the cylinder is larger, and more compressed gas is needed. As we all know, the compressibility of air is relatively high, so the movement speed of the cylinder will be more uneven, and the required The stretching time will be longer, which not only affects the quality of the product, but also affects the production efficiency

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