Plastic bottle and manufacturing method thereof

Abstract

The invention discloses a plastic bottle and a manufacturing method thereof. The manufacturing method of the plastic bottle comprises the steps of: A, preparing a bottle blank with screw threads at abottle opening by utilizing an injection molding machine, wherein the temperature of a material melting cylinder of the injection molding machine ranges from 200 to 230 DEG C, and the temperature of amain runner of a mold of the injection molding machine ranges from 180 to 220 DEG C; B, fixing a hanging ring with screw threads to the bottle opening of the bottle blank in a screwed mode, wherein around hole is formed in the middle of the hanging ring, and the screw threads are arranged on the hole wall of the round hole; C, heating the bottle blank screwed with the hanging ring in the step Bby means of a heating machine; D, and placing the heated bottle blank screwed with the hanging ring in a mold of a bottle blowing machine for bottle blowing, and screwing the hanging ring out to obtain a finished product bottle, wherein the bottle blowing temperature ranges from 25 to 80 DEG C, and the bottle blowing air pressure ranges from 2.5 to 3 MPa. According to the manufacturing method of the plastic bottle, a supporting ring does not need to be designed for the bottle blank opening, the inclination and expansion deformation of the threaded opening can be effectively reduced, the attractiveness is improved, and the yield is increased.

Description

technical field [0001] The invention relates to the technical field of packaging bottles, in particular to a plastic bottle and a manufacturing method thereof. Background technique [0002] The existing two-step method for preparing plastic bottles, its "injection and blow molding" are carried out separately by two independent machines, and the equipment is simple and easy to operate, such as figure 1 As shown, the bottle mouth of the preform 1 in the prior art is provided with a support ring 11, and the plastic bottle prepared by it is prone to crooked teeth, swelling and deformation due to the existence of the support ring, and the preform falls off to the blowing bottle during the blowing process. Mold condition. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a plastic bottle and its manufacturing method that does not need to design a support ring at the bottle mouth, can effectively reduce the crooked mouth...

AI Technical Summary

Problems solved by technology

[0002] The existing two-step method for preparing plastic bottles, its "injection and blow molding" are carried out separately by two independent machines, and the equipment is simple and easy to operate, such as figure 1 As shown, the bottle mouth of the preform 1 in the prior art is provided with a support ring 11, and the plastic bottle prepared by it is prone to crooked teeth, swelling and deformation due to the existence of the support ring, and the preform falls off to the blowing bottle during the blowing process. The condition of the mold

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