Multi-Cavity Molding for Foamed Articles With Tailored Properties
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Solution Overview
Problem
Existing injection molding systems struggle to create foamed articles with varying properties across different portions, limiting the versatility and functionality of foamed polymeric materials.
Innovation Solution
A molding device comprising a first mold, a second mold, and a carrier system that allows for the attachment and detachment of layers with different polymeric materials within a mold cavity, enabling the formation of articles with distinct properties through the use of a carrier system and multiple mold components.
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 portions with different physical or functional properties
Solution Approach 1:
The mold is divided into multiple independent mold cavities (first mold cavity, second mold cavity, third mold cavity) that can be selectively engaged with the carrier. Each cavity can form a different portion of the article with distinct properties, allowing a single mold to produce multi-functional articles by activating only the necessary cavities for each production run.
Solution Approach 2:
The carrier is designed with movable and reconfigurable components that allow dynamic adjustment of which mold cavities are engaged during the molding process. This enables the mold structure to adapt between different production configurations without requiring complete mold replacement or complex retooling.
2Adaptability or versatility
If multiple polymeric layers with different materials are integrated, then the article has enhanced functionality and performance, but the manufacturing process becomes more complex
Solution Approach 1:
The carrier is prepared in advance with specific mold cavities positioned and configured before the molding process begins. Different polymeric layers and materials are pre-positioned in the selected cavities, allowing the multi-layer article to be formed in a single integrated molding operation rather than requiring multiple separate manufacturing steps.
Solution Approach 2:
The invention integrates multiple polymeric materials with different physical and functional properties into a single article through the multi-cavity mold system. Each cavity can accommodate different materials (e.g., foamable vs. non-foamable polymers) that are injected simultaneously or sequentially to create a composite structure with enhanced overall performance.
3Adaptability or versatility
If a carrier system with attachable and detachable components is used, then the mold can create articles with varying properties, but the device complexity increases
Solution Approach 1:
The carrier is designed as a universal platform that can accommodate multiple different mold cavity configurations through its attachable and detachable components. The same carrier structure can be used across different production runs with different cavity arrangements, reducing the need for multiple specialized carriers and simplifying the overall system despite its configurability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the creation of foamed articles with tailored properties by allowing for the integration of multiple polymeric layers with varying materials and configurations, enhancing the functionality and performance of the final product.
Implementation Method 1
a force or pressure is applied to the mixture to inject or extrude the mixture into a cavity of a mold
Implementation Method 2
after a polymeric material is melted and mixed with a blowing agent to form a mixture
Implementation Method 3
the mixture is foamed and cooled in the cavity to form the foamed article
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A molding device includes a first mold, a second mold including a base portion and a peripheral portion disposed around or over the base portion, a mold cavity defined by the first mold and the second mold, and a first carrier disposed within the mold cavity and is attachable to and detachable from the base portion or the peripheral portion of the second mold.