A precise positioning mechanism for a PET bottle blow molding mold

The system utilizes a hydraulic rod and a motor-driven bidirectional screw system to achieve precise positioning of PET bottle blow molding molds, solving the problems of positioning deviation and cumbersome mold replacement, and improving product accuracy and production efficiency.

CN224738800UActive Publication Date: 2026-09-11TIANJIN HAIYU PAPER PROD
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Patent Information

Application Number
CN202522174862.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-10-15
Publication Date
2026-09-11
Estimated Expiration
2035-10-15

AI Technical Summary

Technical Problem

The existing positioning mechanism for PET bottle blow molding molds is prone to positioning deviations due to wear of parts during long-term, high-frequency mold opening and closing operations, which affects the dimensional accuracy of the product. Furthermore, the operation is cumbersome when changing molds of different specifications, which affects production efficiency.

Method used

A hydraulic rod is used to push the positioning plate to apply additional pressure to the mold. Combined with a motor-driven bidirectional lead screw and ball nut system, the mold can be accurately closed and opened. The hydraulic control system can precisely adjust the pressure and distance to avoid positioning deviation and simplify the mold change process.

Benefits of technology

It improved product dimensional accuracy, reduced the probability of defective products, shortened mold changeover time, and improved production efficiency, equipment operating accuracy, and service life.

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Abstract

This utility model discloses a precise positioning mechanism for a PET bottle blow molding mold, including a mounting plate, mold A, mold B, a bracket, and a positioning plate. Mold A and mold B are mounted on the mounting plate, which has a mounting groove. A motor is mounted in the mounting groove, and a bidirectional lead screw is mounted on the motor's drive shaft. Ball nuts are threaded onto two sets of threads in different directions on the bidirectional lead screw, and connecting rods are mounted on the ball nuts. The top ends of the two sets of connecting rods are respectively connected to mold A and mold B. A limit plate is mounted on the mounting plate, and a hydraulic rod is mounted on the limit plate. The positioning plate is mounted on one end of the hydraulic rod. This utility model uses the hydraulic rod to push the positioning plate to apply additional pressure to the mold after mold closing for positioning, improving the operational stability and positioning accuracy of the entire positioning mechanism, shortening the mold change operation time, and effectively improving production efficiency.
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