Multi-Mold Injection System for Layered Foamed Articles
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Solution Overview
Problem
Current injection molding systems for foamed polymeric materials lack the capability to create articles with varying properties across different portions, limiting the potential of foamed articles in terms of strength, weight, impact resistance, and thermal insulation.
Innovation Solution
A molding device and method utilizing a position control mechanism to individually move multiple molds, allowing for the formation of distinct layers with different polymeric materials within a single article by creating and reconfiguring mold cavities, enabling the creation of articles with varied properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single mold cavity is used for injection molding, then the manufacturing process is simple, but the article cannot have different properties in different portions
Solution Approach 1:
The mold system is divided into multiple independent mold cavities (first mold cavity, second mold cavity) that can be individually configured and controlled. Each cavity can receive different polymeric materials and be processed independently, enabling different portions of the article to have different properties while maintaining overall system functionality
Solution Approach 2:
The patent introduces a temporal dimension to the molding process by sequentially forming different layers (first layer, second layer) in different mold cavities and then combining them. This transforms a spatial limitation into a temporal sequence, allowing property variation without requiring all cavities to be active simultaneously
2Adaptability or versatility
If multiple polymeric materials are used to create different layers, then the article has tailored properties, but the manufacturing process becomes complex
Solution Approach 1:
The manufacturing process is segmented into distinct stages: forming the first layer in the first mold cavity, then forming the second layer in the second mold cavity. Each stage uses specific materials and parameters optimized for that layer, simplifying the overall process by breaking down the complex multi-material molding into manageable sequential steps
Solution Approach 2:
The first layer is formed and prepared in advance in the first mold cavity before the second layer is added. This preliminary action allows optimization of each layer's formation conditions independently and enables the second layer to be built upon a already-positioned first layer, simplifying the integration process
Data Source
AI summary
A molding device includes a first mold, a second mold, a mold cavity, and a position control mechanism attached to the first mold and the second mold, wherein the first mold and the second mold are movable by the position control mechanism individually. A molding method includes providing a molding device having a first mold, a second mold and a third mold; engaging the first mold with the second mold to form a first mold cavity; injecting a first material into the first mold cavity to form a first layer; disengaging the first mold from the second mold by a position control mechanism; engaging the third mold with the second mold to form a second mold cavity; injecting a second material into the second mold cavity to form an article; and disengaging the third mold from the second mold by the position control mechanism.