Internal pressure cylinder of a blow molding machine die clamping device with controllable internal pressure boosting function

By designing a controllable internal pressure booster cylinder in the mold clamping device of the blow molding machine, the problems of loose cylinder structure and unstable pressure boosting were solved, achieving controllable internal pressure boosting and ensuring the stability and product quality of each pressure boost.

CN115727022BActive Publication Date: 2026-06-19SUZHOU TONGDA MACHINERY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SUZHOU TONGDA MACHINERY
Filing Date
2022-11-24
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

The existing blow molding machine's mold clamping device has a loosely structured booster cylinder, and the high-pressure sequence valve is set to be free, resulting in poor protection. It is difficult to achieve controllable internal boosting, and the boosting pressure is difficult to establish or is not ideal, which affects product quality.

Method used

An internal pressure cylinder with controllable internal pressure function was designed for the mold closing device of a blow molding machine. By setting a controllable internal pressure adjustment mechanism between the cylinder body and the pressure cylinder, the pressure piston is ensured to open in a controllable sequence, and the pressure oil chamber and the pressure oil chamber are effectively connected. A sealing ring and a one-way valve stem are added to control the oil passage.

Benefits of technology

It achieves a good controllable internal pressurization effect, ensuring stable and reliable pressurization each time, avoiding the problem of difficult or unsatisfactory pressurization pressure, and improving product quality.

✦ Generated by Eureka AI based on patent content.

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    Figure CN115727022B_ABST
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Abstract

An internal pressure boosting cylinder for a blow molding machine's mold closing device with controllable internal pressure boosting function belongs to the field of hollow plastic product molding machinery technology. It includes a cylinder body, a left end cover, a boosting cylinder, a right end cover, a piston rod, and a boosting piston. The left end cover is connected to the left end of the cylinder body and has a cylinder cylinder return oil hole. The boosting cylinder is fixed to the right end of the cylinder body, and the right end cover, along with the boosting cylinder, is also fixed to the right end of the cylinder body. The right end cover has a mold closing oil inlet, which communicates with the boosting piston's oil passage. The right end of the piston rod is located inside the cylinder body, and the boosting piston is located inside the right end cover cavity of the cylinder body. The boosting piston's oil passage communicates with the pressure oil chamber. The key feature is that it also includes a controllable internal pressure boosting adjustment mechanism, which is connected to the boosting cylinder and communicates with the pressure oil chamber and the boosting oil chamber's oil passage. Advantages: It exhibits excellent controllable internal pressure boosting effect, ensuring that the cylinder can boost pressure every time and that the structure is reliable and stable.
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