Movable Middle Mold for Uniform Foamed Polymer Pores
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Solution Overview
Problem
The existing molding processes for foamed polymer articles face challenges in achieving uniform distribution and high density of bubble pores, affecting the physical properties and appearance of the final product, which limits their applications and advantages.
Innovation Solution
A molding device comprising an upper mold, a lower mold, and a moveable middle mold attached to the lower mold via a position control mechanism, which jointly define a mold cavity to ensure uniform material distribution and formation of foamed polymer articles with predetermined shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a traditional two-mold system is used for injection molding, then the device complexity is low, but the uniformity and density of bubble pores in the foamed polymer article are insufficient
Solution Approach 1:
The mold system is segmented into three independent molds (first mold, second mold, and third mold) that can move relative to each other. This segmentation allows each mold to independently control different aspects of the molding process, thereby achieving uniform bubble pore distribution while maintaining manageable device complexity through modular design
2Manufacturing precision
If the middle mold is fixed relative to the outer molds, then the device complexity is reduced, but the ability to control material distribution and bubble pore formation is limited
Solution Approach 1:
The middle mold is designed to move dynamically relative to the first and second molds during the injection process. This dynamic positioning capability allows real-time adjustment of material flow and bubble pore formation, achieving precise control over material distribution without requiring an overly complex fixed control system
3Manufacturing precision
If injection pressure is increased to improve material distribution, then the uniformity of material distribution improves, but the risk of defects and damage to the mold cavity increases
Solution Approach 1:
The movable middle mold dynamically adjusts its position during injection to control material flow without requiring excessive injection pressure. This dynamic adjustment allows uniform material distribution to be achieved while maintaining safer operating pressures that reduce the risk of mold cavity damage and injection defects
Data Source
AI summary
A molding device and a molding method are disclosed. The molding device includes an upper mold, a lower mold and a middle mold. The lower mold is disposed below the upper mold. The middle mold is disposed between the upper mold and the lower mold. The middle mold is moveably attached to the lower mold through a position control mechanism.