Improved molding method
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Solution Overview
Problem
Existing methods face challenges in molding materials like frothed foams and low durometer polymeric gels, which are difficult to shape due to adhesion issues and the formation of bubbles, especially in continuous processes and for creating complex or thick products.
Innovation Solution
A system and method involving compression molding with a movable mold support assembly, a material mixing and dispensing system, and controlled mold closure to prevent bubble formation, using a barrier and stabilization layer to manage material flow and polymerization, allowing for the molding of thick, uniform products with reduced defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional molding methods are used for frothed foams and low durometer polymeric gels, then the molding process is simple, but the material forms bubbles and adheres to molds making it difficult to shape
Solution Approach 1:
The mold is prepared in advance by applying a release agent to the mold surface before introducing the material. This preliminary action prevents adhesion and bubble formation during the molding process, allowing the material to be shaped accurately without defects.
Solution Approach 2:
A release agent is introduced as an intermediary substance between the mold surface and the polymeric material. This intermediary layer prevents direct contact and adhesion, eliminating bubble formation and enabling successful molding of difficult materials like frothed foams and low durometer gels.
2Manufacturing precision
If conventional molding methods are used for thick products, then the process is straightforward, but the products exhibit non-uniform thickness and high defect rates
Solution Approach 1:
The mold cavity is pre-prepared with release agents and proper sealing before material introduction. This preliminary preparation ensures uniform material distribution and prevents defects during the molding of thick products, achieving consistent thickness and high reliability.
Solution Approach 2:
Release agents serve as intermediaries that facilitate uniform material flow and distribution throughout the mold cavity. This intermediary layer prevents adhesion and ensures consistent thickness even in thick product sections, reducing defects and improving reliability.
3Ease of operation
If body contacting regions are made softer for comfort, then user comfort improves, but the material becomes more difficult to mold due to adhesion
Solution Approach 1:
The mold surface is pre-treated with release agents before introducing soft polymeric materials for body contacting regions. This preliminary action prevents adhesion of the soft material to the mold, maintaining both user comfort and ease of manufacture by enabling successful molding of soft materials.
Solution Approach 2:
A release agent is introduced as an intermediary between the mold and soft polymeric material. This intermediary prevents adhesion of the soft, comfortable material to the mold surface, allowing the material to be molded successfully while maintaining its softness for user comfort.
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 efficient molding of thick, uniform products with reduced defects and improved part quality, facilitating the use of materials that were previously difficult to mold, such as frothed foams and low durometer gels, by controlling mold closure and using barrier and stabilization layers to prevent bubble formation.
Implementation Method 1
compression molding with a movable mold support assembly
Implementation Method 2
using a barrier and stabilization layer to manage material flow and polymerization
Implementation Method 3
controlled mold closure to prevent bubble formation
Data Source
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AI summary
Disclosed herein is a molding system that facilitates the molding of very thick products from materials such as gel and/or mechanically frothed foam, substantially free of visual defects, such as air bubbles, by controlling the rate of mold closure and/or interrupting the mold closure.