Non-contact valve needle glue feeding runner structure
By using a contactless valve needle-inlet flow channel structure and a combination of flow channel separators and heating seats, the problems of stress lines and high scrap rate in PET plastic injection molding are solved, enabling smooth injection molding and high-quality molding of high-temperature PET plastic.
CN115416241BActive Publication Date: 2026-02-06GUANGDONG GUOZHU MOLDS TECH CO LTD
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Patent Information
- Application Number
- CN202211255917.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-10-13
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2042-10-13
AI Technical Summary
Technical Problem
In existing technologies, the temperature difference between the valve needle and the molten colloid during PET plastic injection molding at 280°C and above leads to stress lines and high scrap rates.
Method used
The system employs a non-contact valve needle injection flow channel structure, which separates the flow channel and valve needle through a flow channel separator. The flow channel separator is heated by a heating seat to keep the molten PET plastic from contacting the valve needle throughout the injection molding process, thus avoiding stress lines and crystallization caused by temperature differences.
Benefits of technology
It effectively avoids the generation of stress lines, reduces product scrap rate, and improves product quality and molding effect.
✦ Generated by Eureka AI based on patent content.
Abstract
The present application belongs to the technical field of injection molding, and discloses a non-contact valve needle glue feeding runner structure, which comprises a heating seat, a glue injection hole, a glue injection cavity and a valve needle, wherein the glue injection hole and the glue injection cavity are arranged in the heating seat, the glue injection hole is communicated with the glue injection cavity, a runner separator is arranged in the heating seat, the runner separator is at least partially arranged in the glue injection cavity, at least one runner for the flow of hot molten glue is formed between the runner separator and the glue injection cavity, a valve needle hole is arranged in the runner separator to separate the glue injection cavity and the valve needle, and the heating seat is at least partially tightly combined with the runner separator to enable the heating seat to perform heat transfer on the runner separator. The present application solves the problem of the insufficient improvement of the hot runner structure for the PET plastic injection molding products with a temperature of 280 DEG C or above in the prior art, which leads to the stress line when the valve needle is sealed and contacts the molten glue of the hot runner, and the high waste rate.
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