Injector Main Body Support Pin Design for Injection Molding Stability
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Solution Overview
Problem
Injectors with small cross sections are prone to bending during the injection-molding process due to injection and melt pressures, leading to potential damage and loss of functionality.
Innovation Solution
The use of a main body designed as an insert for an injection-molding tool with a support pin system, including a first and second opening in the injection-molded housing, provides stable support to prevent bending by distributing pressure effectively, with the second opening oriented at a 90° angle to the first, ensuring adequate support even at high injection pressures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the injector cross section is reduced to minimize size, then the injector size is improved, but the injector becomes prone to bending under injection pressure
Solution Approach 1:
The support pin is positioned to contact the main body before the injection molding process begins, establishing preliminary support against the upcoming injection pressure. This pre-positioning prevents bending from occurring during the high-pressure injection phase.
Solution Approach 2:
The support pin acts as an intermediary element between the injection-molding tool and the main body, providing mechanical support and force distribution. This intermediary structure allows the small-cross-section main body to withstand injection pressures without bending.
2Manufacturing precision
If injection pressure is increased to improve molding quality, then the molding precision is improved, but the main body bends due to higher forces
Solution Approach 1:
The support pin provides a counteracting force against the injection pressure by positioning itself to receive and redistribute the compressive forces. This counter-force mechanism allows high injection pressures to be applied without causing main body bending.
Solution Approach 2:
The support pin changes the mechanical parameter distribution by introducing a support point that alters how injection pressure forces are distributed across the main body. This parameter change enables higher injection pressures to be applied safely.
3Stability of the object's composition
If a support pin is added to prevent bending, then the structural stability is improved, but the device complexity increases
Solution Approach 1:
The support pin serves multiple functions: it supports the main body during injection, defines the position of the first opening, and provides a reference for alignment. This multi-functionality reduces the need for additional separate components.
Solution Approach 2:
The support pin functionality is merged with the injection-molding tool structure itself, rather than being a separate auxiliary component. This integration minimizes additional complexity while achieving the required stability.
Data Source
AI summary
An injector for introducing a fluid includes a main body designed as an insert and including a first tool contact surface for an injection-molding tool and a second tool contact surface for the injection-molding tool; and an injection-molded housing that completely encloses the main body on at least one portion of the main body, the injection-molded housing including at least one first opening that extends linearly towards the main body.