Variable Pressure Injection Mold for Shoe Materials
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Solution Overview
Problem
Current plastic injection molding technologies for shoe materials face issues with material deformation due to unbalanced flow of injection raw materials caused by temperature and pressure fluctuations, leading to defective products and increased costs from secondary processing.
Innovation Solution
A variable pressure injection mold with a mold body and a variable pressure air discharge layer featuring non-equidistantly distributed pores that connect the foam molding space, allowing air to be pressed into these pores to auto-regulate and balance internal pressure, preventing material deformation and residual waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If venting pores are arranged only on the periphery of the foam molding space, then the structure is simple and easy to manufacture, but variable pressure balance of all surfaces cannot be realized effectively
Solution Approach 1:
The air discharge layer is divided into multiple regions with different pore distributions. The first air discharge region has pores distributed sparsely or not at all, while the second air discharge region has pores distributed densely, creating segmented pressure control zones that achieve better pressure balance
Solution Approach 2:
Different regions of the air discharge layer are given different pore distribution characteristics. The first air discharge region corresponds to areas requiring less air discharge, while the second air discharge region corresponds to areas requiring more air discharge, achieving localized pressure control
2Manufacturing precision
If concavities are arranged on the foam molding space for edge shoe soles, then fluidity of injection raw material sheet is improved, but air is pressed into concavities and cannot be discharged causing defective products
Solution Approach 1:
The variable pressure air discharge layer acts as an intermediary between the foam molding space and the external environment. It provides a controlled pathway for air to escape during molding, preventing air entrapment in concavities while maintaining fluidity of the injection material
Solution Approach 2:
The air discharge layer is designed as a porous material with specific pore distributions in different regions. This porous structure allows air to pass through controlled pathways while maintaining the integrity and fluidity of the molding process
3Device complexity
If conventional molding is used, then the process is simple, but material deformation occurs due to unbalanced flow from temperature and pressure fluctuations
Solution Approach 1:
The patent changes the physical parameters of the air discharge layer, specifically the pore distribution density in different regions. By controlling pore distribution (sparse in first region, dense in second region), the system achieves variable pressure control that prevents material deformation while maintaining process simplicity
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
The solution ensures stable internal pressure during molding, preventing material deformation, reducing secondary processing needs, and enhancing product accuracy and structural strength through the formation of tiny protrusions on the surface, which also provide a unique tactile feature.
Implementation Method 1
A plurality of variable pressure pores are provided in the variable pressure air discharge layer. The variable pressure pores connect the foam molding space... allowing air to be pressed into these pores to auto-regulate and balance internal pressure
Data Source
AI summary
A variable pressure injection mold, an injected shoe material, and a method for manufacturing the same are provided. The variable pressure injection mold for plastic injection molding includes a mold body and a variable pressure air discharge layer. The mold body has a foam molding space. The variable pressure air discharge layer is arranged on the mold body and is correspondingly exposed to the foam molding space. A plurality of variable pressure pores are provided in the variable pressure air discharge layer and the variable pressure pores connect the foam molding space.