Vehicle Crash Pad Foam Injection Mold Process
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The manufacturing of vehicle crash pads is time-consuming and costly due to the complexity of processes and materials used, particularly in forming the skin layer, which affects competitiveness and production efficiency.
Innovation Solution
A method involving the injection of a skin foam-forming composition between molds with a color coating layer and a core layer, followed by foaming to form a skin foam layer, which eliminates the need for conventional skin layer processes, incorporating a color coating layer, a skin foam layer, and a core layer without scoring, using specific resin and additive compositions for enhanced mechanical and sensory properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional skin layer formation processes are used, then the crash pad achieves required appearance and sensory properties, but the production time and manufacturing cost increase significantly
Solution Approach 1:
The patent combines the skin layer formation and color coating processes into a single foam injection step. The skin foam-forming composition is injected between the lower mold with color coating layer and upper mold with core layer, forming both the skin layer and achieving color in one operation, thereby eliminating sequential processes and reducing production time while maintaining appearance quality
Solution Approach 2:
The patent uses a composite structure consisting of a color coating layer formed on the mold, a skin foam layer formed by foaming the skin foam-forming composition, and a core layer. This composite material approach allows the skin foam layer to provide both structural integrity and aesthetic appearance, replacing conventional multi-step skin layer formation processes
2Manufacturing precision
If conventional skin layer processes and materials are used, then the crash pad achieves required sensory properties, but the material cost increases
Solution Approach 1:
The patent changes the physical and chemical parameters of the skin layer by using a foam-forming composition that expands in situ. The skin foam-forming composition includes polyol compound, chain extender, foaming agent, and isocyanate-based curing agent, which undergo chemical reaction to form a lightweight foam structure with desired sensory properties, reducing material cost while achieving required performance
Solution Approach 2:
The color coating layer is formed by applying color coating composition to the inside surface of the lower mold and curing it, creating a durable color layer that is copied onto the final product surface. This approach eliminates the need for expensive post-coating processes and reduces material costs while maintaining appearance quality
3Ease of operation
If scoring process is applied to the skin layer, then airbag deployment is enabled, but the structural integrity and sensory properties are compromised
Solution Approach 1:
The patent performs preliminary action by forming a color coating layer on the mold surface before injecting the skin foam-forming composition. This pre-formed coating layer serves as both the aesthetic surface and the deployment interface for the airbag, eliminating the need for subsequent scoring operations that would compromise the skin layer integrity and sensory properties
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 simplifies the production process, reduces costs, and results in a crash pad with excellent lightweight and sensory properties while maintaining mechanical integrity and enabling easy airbag deployment without the need for scoring, thus improving productivity and cost-effectiveness.
Implementation Method 1
a step of injecting a skin foam-forming composition between a lower mold having a color coating layer formed thereon and an upper mold having a core layer formed thereon, and foaming the injected skin foam-forming composition to form a skin foam layer
Implementation Method 2
the color coating layer is formed by applying the color coating composition to the inside surface of the lower mold and curing the applied color coating composition
Data Source
AI summary
The present invention relates to a crash pad for a vehicle and a manufacturing method thereof. In one embodiment, the method for manufacturing the crash pad for the vehicle comprises a step of injecting a skin foam-forming composition between a lower mold having a color coating layer formed thereon and an upper mold having a core layer formed thereon, foaming the injected skin foam-forming composition to form a skin foam layer, wherein the color coating layer is formed by applying the color coating composition to the inside surface of the lower mold and curing the applied color coating composition.