Screw Compatibility Check for Pulverized Resin Molding
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Solution Overview
Problem
Conventional molding methods using pulverized material resin materials face issues with non-uniform particle shapes and sizes, leading to voids in molten resin, insufficient melting, and increased molding failures due to inappropriate screw configurations.
Innovation Solution
A method that measures the area of particle shapes of pulverized materials and determines a shape index to assess compatibility with screw depths, displaying inappropriate conditions and adjusting molding parameters to ensure proper mixing ratios and bulk densities for stable molding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If pulverized material with random particle shapes and sizes is used, then material reuse and cost reduction are achieved, but voids are generated in molten resin and molding quality deteriorates
Solution Approach 1:
The patent applies parameter changes by measuring the area of pulverized material particles and calculating a shape index to determine compatibility with screw groove depth. By adjusting molding parameters based on the shape index (comparing against threshold values), the system optimizes plasticization conditions for pulverized material with random particle shapes and sizes, ensuring adequate melting while maintaining material reuse benefits
Solution Approach 2:
The patent replaces mechanical trial-and-error methods with an automated measurement and calculation system. An imaging device captures particle images, the control unit calculates area and shape index parameters, and automatically determines screw compatibility. This substitution of mechanical judgment with automated optical measurement and computational analysis enables precise control of molding quality while using pulverized material
2Ease of operation
If particle size of pulverized material is large relative to screw groove depth, then material handling is simplified, but plasticization is insufficient and molding failures increase
Solution Approach 1:
The patent implements feedback by measuring actual particle areas, calculating shape indices, and using these results to determine whether the screw configuration is appropriate. The system provides feedback on plasticization completeness by comparing the shape index against threshold values, enabling adjustment of molding parameters to ensure adequate melting while maintaining ease of material handling
Solution Approach 2:
The patent applies preliminary action by measuring and evaluating particle characteristics before the molding process begins. The control unit calculates the shape index in advance and determines screw compatibility before plasticization occurs, allowing pre-adjustment of molding parameters to ensure complete plasticization while maintaining simple material handling procedures
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 approach allows for rapid and accurate determination of appropriate screw configurations, enhancing molding quality, reducing failures, and stabilizing production by ensuring appropriate mixing and melting conditions.
Implementation Method 1
an imaging device is used to measure an area Ac of a particle shape Qcg of the pulverized material Qc
Implementation Method 2
a control unit computes a pulverized material shape index Ki indicating a degree of match between the area Ac and a depth Ds of a screw groove Gs
Implementation Method 3
when pulverized material resin material Q including pulverized material Qc as at least a part is plasticized and injection-molded by rotating a screw 3 inserted in a heating tube 2
Implementation Method 4
plasticized and injection-molded by rotating a screw 3 inserted in a heating tube 2
Implementation Method 5
injection-molded by rotating a screw 3 inserted in a heating tube 2
Data Source
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AI summary
When a pulverized material resin material Q including a pulverized material Qc as at least a part is plasticized and injection-molded by rotating a screw 3 inserted in a heating tube 2, before use of the pulverized material Qc, the area Ac of a particle shape Qcg of the pulverized material Qc in one direction is measured, a pulverized material shape index Ki indicating the relative size of the area Ac with respect to the depth Ds of a screw groove Gs is determined by computation processing and when the size of the pulverized material shape index Ki is equal to or greater than a preset setting value Ks, the screw 3 is determined to be inappropriate, and at least the result of the determination is displayed.