Laminated Substrate Porosity for Low-Temperature Molding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for molding fiber-reinforced thermoplastic plastics face challenges in achieving sufficient shapeability into complex shapes at low mold temperatures without compromising mechanical strength, often requiring high mold temperatures that lead to solidification issues and deformation.
Innovation Solution
A laminated substrate is created by applying a sheet-like material with porosity between 50% to 99% on a prepreg substrate, which includes reinforcing fibers and a thermoplastic resin, allowing for heat insulation and maintaining mechanical strength while enabling molding at lower temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the mold temperature is high, then stamping moldability is improved, but solidification or crystallization within the mold occurs insufficiently and significant deformation occurs after the molded product is taken out
Solution Approach 1:
The invention applies different temperature conditions to different stages of the molding process: high mold temperature (100°C to 200°C) during stamping to ensure excellent moldability and fluidity, then rapid cooling after molding to achieve sufficient solidification and prevent deformation. This local differentiation of temperature conditions resolves the contradiction between moldability and shape stability.
Solution Approach 2:
The invention employs periodic temperature variation in the molding process: first maintaining high temperature during the stamping phase to enable complex shape formation, then transitioning to rapid cooling phase to ensure solidification. This periodic temperature control allows the material to exhibit different properties at different times, resolving the contradiction between fluidity during molding and stability after molding.
2Manufacturing precision
If the mold temperature is low, then deformation after molding is reduced, but sufficient stamping moldability is not obtained and shaping into complicated shapes is insufficiently achieved
Solution Approach 1:
The invention performs preliminary heating of the mold to a high temperature (100°C to 200°C) before introducing the thermoplastic resin. This preliminary action ensures the mold is at the optimal temperature for achieving excellent stamping moldability and fluidity, allowing the material to flow into complicated shapes. After molding, rapid cooling is applied to achieve shape stability, thus resolving the contradiction through sequential temperature control.
3Ease of manufacture
If the content of reinforcing fibers is reduced or length is shortened to enhance fluidity, then stamping moldability is improved, but mechanical properties are deteriorated
Solution Approach 1:
The invention changes the temperature parameter of the mold from low to high (100°C to 200°C) during the molding process. This parameter change enhances the fluidity of the thermoplastic resin without requiring reduction of fiber content or length, thereby maintaining both excellent stamping moldability and mechanical properties. The high temperature allows the resin to flow more easily while preserving the reinforcing fiber structure.
Solution Approach 2:
The invention creates a local high-temperature environment within the mold during stamping, allowing the thermoplastic resin to exhibit enhanced fluidity only in the molding zone. This localized temperature control enables complex shape formation without compromising the overall fiber reinforcement structure, thus improving moldability while maintaining mechanical strength.
4Ease of manufacture
If the viscosity of the matrix resin is decreased to enhance fluidity, then stamping moldability is improved, but mechanical properties are deteriorated
Solution Approach 1:
Instead of changing the chemical composition or viscosity of the matrix resin, the invention changes the temperature parameter of the molding process. By heating the mold to 100°C to 200°C, the resin temporarily exhibits enhanced fluidity during molding, then solidifies after cooling. This parameter-based solution improves moldability without compromising mechanical properties that would result from chemical modifications.
5Ease of manufacture
If the melting point or glass transition point of the matrix resin is lowered to enhance fluidity at low temperature, then stamping moldability is improved, but mechanical properties at high temperature are deteriorated
Solution Approach 1:
The invention changes the external temperature parameter (mold temperature) rather than the intrinsic thermal properties of the resin. By setting the mold temperature to 100°C to 200°C, the resin achieves enhanced fluidity during molding without requiring a lower melting point or glass transition point. This approach maintains the resin's high-temperature mechanical properties while achieving excellent moldability through process parameter optimization.
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 provides excellent shapeability into complex shapes and maintains mechanical strength, reducing warpage and gas retention, while allowing for molding at lower temperatures, resulting in high-quality molded products with improved surface characteristics.
Implementation Method 1
A laminated substrate is created by applying a sheet-like material with porosity between 50% to 99% on a prepreg substrate, which includes reinforcing fibers and a thermoplastic resin, allowing for heat insulation
Data Source
AI summary
Provided is a laminated substrate wherein a sheet-shaped material with a porosity of 50-99% is laminated onto at least one surface of a prepreg substrate which includes a reinforcing fiber and a thermoplastic resin.