Multi-Cavity Mold for Simultaneous Compound Injection Molding
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Solution Overview
Problem
Conventional injection molding processes for multi-component products with different colors and materials are complex, inefficient, and prone to defects, as each component must be molded individually and assembled later.
Innovation Solution
The use of multiple molds with shielding cavities and positioning cavities allows for the simultaneous injection molding of multiple components with different materials and colors, ensuring independence and integrity of each component while eliminating the need for post-molding assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple components are molded in individual molds and assembled later, then each component can be formed with different materials and colors, but the production process becomes complex and inefficient
Solution Approach 1:
The patent combines multiple individual molding operations into a single integrated mold system. The mold includes multiple mold cavities that can simultaneously form multiple components with different materials and colors in one injection molding cycle, eliminating the need for separate molding and assembly processes.
Solution Approach 2:
The integrated mold serves multiple functions: it can mold multiple different components with different materials and colors simultaneously, and it also provides automatic assembly through the integrated design of mold cavities and assembly chambers. This multi-functional design eliminates the need for separate dedicated molds for each component.
2Ease of manufacture
If multiple components are molded in individual molds and assembled later, then each component can be formed separately, but the assembly process increases production time and defect rate
Solution Approach 1:
The integrated mold enables continuous production by combining molding and assembly operations into a single uninterrupted process. Multiple components are molded and assembled in one continuous injection molding cycle, eliminating idle time between operations and maximizing productivity.
Solution Approach 2:
The mold design incorporates preliminary positioning features and assembly chambers that prepare for component assembly during the molding process itself. Components are positioned and prepared for assembly while still in the mold, eliminating the need for separate assembly operations later.
3Adaptability or versatility
If components are molded separately and assembled, then manufacturing flexibility is maintained, but the risk of damage and defective products increases
Solution Approach 1:
By combining molding and assembly into a single integrated process, the patent eliminates handling and transportation steps that could damage components. Components are assembled directly in the mold while still in a controlled environment, reducing the risk of damage and defects.
4Strength
If a later-injected plastic has a higher melting point, then it can maintain structural integrity, but it will melt and mix with previously injected plastics causing defects
Solution Approach 1:
The patent controls the injection temperature and timing parameters to ensure that later-injected plastics with higher melting points do not exceed the melting temperature of previously injected plastics. By carefully managing these parameters, the system maintains both structural integrity and clear component boundaries.
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
This method improves production efficiency, reduces costs, and minimizes defects by allowing for the direct integration of multiple components into a single, whole piece product, while maintaining the integrity and independence of each component.
Implementation Method 1
a melting point of a plastic injected into the third mold cavity is lower than that of a plastic injected into the first mold cavity and a plastic injected into the second mold cavity
Implementation Method 2
the plastic injected into the first mold cavity and the plastic injected into the second mold cavity will not be chemically dissolved and mixed together with each other and with the plastic injected into the third mold cavity
Data Source
AI summary
Molds for compound injection molding, including at least a first mold, a second mold, and a third mold; the first mold has a first mold cavity for injection molding of a first component; the second mold has a shielding cavity for shielding the first component and a second mold cavity for injection molding of a second component; the third mold has positioning cavities for positioning the first component and the second component, and a third mold cavity for injection molding of a third component; the positioning cavities are in communication with the third mold cavity, so that the third component can be connected integrally with the first component and the second component to form a one whole piece of product.