Washing Machine Diaphragm Injection Mold with Automatic Ejection
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Solution Overview
Problem
Existing injection molding processes for washing machine diaphragms often result in a stripped pattern and manual separation challenges, affecting product quality and efficiency.
Innovation Solution
An injection mold design featuring a cylindrical body with undercuts, movable cores, and a gate with pin holes to ensure uniform material mixing and automatic diaphragm separation, utilizing a runner to supply molten thermoplastic elastic material and a cam core for easy ejection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a gate is used to guide molten thermoplastic elastic body into the cavity, then the material is supplied efficiently, but a stripped pattern is formed on the diaphragm surface
Solution Approach 1:
The gate is divided into multiple pin holes instead of a single opening. This segmentation allows the molten material to be distributed through multiple small channels, preventing the formation of a concentrated flow path that causes stripped patterns on the diaphragm surface while maintaining efficient material supply to the cavity
Solution Approach 2:
The gate structure is designed with multiple pin holes of specific size and distribution, creating localized flow paths that control the material injection pattern. This local quality modification ensures uniform material distribution without creating the concentrated flow that leads to surface defects
2Productivity
If the diaphragm is manufactured by injection molding, then production efficiency is improved, but automatic separation of the manufactured diaphragm is difficult
Solution Approach 1:
The mold incorporates movable cores and slide cores that can dynamically change position during the molding and ejection cycles. These movable components create undercuts and release features that enable automatic separation of the diaphragm from the mold without manual intervention, maintaining high production efficiency
Solution Approach 2:
The mold design includes automatic ejection mechanisms where the movable cores and slide cores automatically perform the separation function. The diaphragm is ejected automatically through the coordinated movement of mold components, eliminating the need for manual separation operations
3Stability of the object's composition
If the gate is constituted by a plurality of pin holes, then uniform material mixing is achieved, but the device complexity increases
Solution Approach 1:
The gate is segmented into multiple pin holes, which simplifies the overall structure compared to complex multi-channel gating systems. Each pin hole acts as an independent, simple flow path, and their collective arrangement achieves uniform material distribution without requiring complex control mechanisms
Data Source
AI summary
Disclosed is an injection mold for washing machine diaphragms wherein the operations of an uppermost first slide core to support the upper part of a first step of a diaphragm manufactured in a cavity and a cam core to support the lower part of a second step of the manufactured diaphragm are controlled to automatically separate the manufactured diaphragm from the cavity.