Injection Molding With Modular Molds for Multi-Component Articles
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Solution Overview
Problem
Existing injection molding systems struggle to effectively form articles with multiple components having different physical or functional properties using foamed polymeric materials.
Innovation Solution
An injection molding system comprising a first mold, a second mold, and a middle mold with a supporting unit and movable inner and outer middle molds, allowing for the formation of mold cavities that surround a first component, followed by injecting polymeric material to create an article with the component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional injection molding system with single or dual molds is used, then the manufacturing process is simple, but the ability to form articles with multiple components having different physical or functional properties is insufficient
Solution Approach 1:
The molding system is divided into multiple independent mold units (first mold, second mold, middle mold) that can be engaged in different combinations. Each mold unit can be selectively engaged with others to create different mold cavity configurations, enabling the formation of articles with varying numbers and arrangements of components without requiring a completely different mold system.
Solution Approach 2:
The mold units are designed to be movable and engageable/disengageable relative to each other. The middle mold can be engaged with either the first mold or the second mold or both, creating dynamic reconfigurability. This allows the same physical mold units to serve multiple functions and produce different article configurations through selective engagement sequences.
2Manufacturing precision
If multiple mold units are engaged to form complex mold cavities, then articles with multiple components can be formed, but the manufacturing process becomes more complex
Solution Approach 1:
The mold units are pre-configured with specific engagement interfaces and alignment features that enable precise positioning when engaged. The supporting units and cavity structures are prepared in advance on each mold unit, so that when the molds engage, the components are automatically positioned with high precision without requiring complex real-time adjustments during the molding process.
Solution Approach 2:
The middle mold serves as an intermediary element that facilitates the engagement between the first mold and the second mold. It provides a standardized interface and coordination mechanism that simplifies the overall engagement process, enabling precise formation of multi-component articles through a systematic sequence of mold interactions rather than direct complex multi-body engagement.
3Strength
If foamed polymeric material is used to create lightweight and insulating articles, then the article properties are improved, but the challenge increases in forming multiple components with different physical properties
Solution Approach 1:
The molding system enables different regions of the final article to have different properties by allowing insertion of components with distinct physical characteristics (such as non-foamed inserts, different foam densities, or components with varying thermal/mechanical properties) into specific locations within the mold cavity. The polymeric material can be foamed or non-foamed in different zones depending on the local requirements of each component integration point.
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 production of articles with multiple components having distinct properties by ensuring precise integration and attachment of components within the mold cavities, enhancing the structural integrity and functionality of the final product.
Implementation Method 1
injecting a polymeric material into the mold cavity to surround the first component
Implementation Method 2
Foamed polymeric material has many advantages, such as high strength, low weight, impact resistance, thermal insulation
Data Source
AI summary
An injection molding method is provided. A molding device is provided, and the molding device includes a first mold, a second mold over the first mold, and a middle mold between the first mold and the second mold. A first component is disposed on the second mold. The middle mold is engaged with the first mold and the second mold to form a mold cavity after the first component is disposed on the second mold. A polymeric material is injected into the mold cavity to surround the first component. An article formed by the polymeric material and the first component is obtained.