Manual Injection Molding Coated Components
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing injection molding processes for producing coated components, such as plastic soles, face challenges including lengthy operating times, damage during demolding, irregular surface finishes, and the need for costly cleaning and grinding steps, especially when using low-density foams which are prone to soiling and UV instability.
Innovation Solution
A manual injection molding process where a release agent composition is applied to the molding tool, flashed, and then crosslinked with a composition Z1, allowing for the production of coated components with enhanced mechanical and environmental resistance, without the need for external release agents, enabling damage-free demolding and recoating with commercial materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external release agents are used in injection molding, then demolding is enabled, but operating time increases and surface quality deteriorates
Solution Approach 1:
The patent combines the release agent function with the coating function by applying a coating composition to the molding tool that serves dual purposes: it provides release properties and forms the final coating layer on the component. This eliminates the need for separate external release agents and subsequent coating steps, reducing operating time while maintaining both demolding capability and surface quality.
Solution Approach 2:
The coating composition applied to the molding tool performs multiple functions simultaneously: it acts as a release agent to enable demolding, provides the final coating layer on the component, and eliminates the need for separate release agent removal steps. This multi-functionality resolves the contradiction by eliminating unnecessary process steps while maintaining reliable demolding.
2Reliability
If external release agents are used, then demolding is enabled, but surface quality deteriorates due to irregular surface structures
Solution Approach 1:
By merging the release agent application with the coating application step, the patent ensures that the same material that provides release properties also forms the final coating layer. This eliminates the need for separate external release agents that cause irregular surface structures, while the integrated coating composition provides both release functionality and uniform surface quality.
3Reliability
If external release agents are used, then demolding is enabled, but additional cleaning processes are required
Solution Approach 1:
The patent extracts the release agent function from the demolding process and integrates it into the coating application step. By applying the coating composition directly to the molding tool before injection, the release agent function is incorporated into the coating layer itself, eliminating the need for separate release agent removal and cleaning processes.
Solution Approach 2:
The patent merges the release agent application with the coating application, so that a single coating composition performs both release and coating functions. This integration eliminates the need for separate cleaning processes that would be required if external release agents were used, reducing overall process complexity.
4Ease of manufacture
If low-density foams are used, then component production is enabled, but UV stability and resistance to soiling deteriorate
Solution Approach 1:
The patent uses a composite coating composition that combines multiple functional ingredients: UV stabilizers, soiling resistance agents, and coating binders. This composite coating is applied to the molding tool and forms a protective layer on the low-density foam component, providing UV stability and soiling resistance while maintaining the ease of manufacture of foam-based components.
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 process reduces operating times, eliminates the need for costly cleaning and grinding, produces components with regular surfaces, and enhances mechanical and UV stability, allowing for immediate protection against environmental influences.
Implementation Method 1
flashing of the release agent composition applied in step (A)
Implementation Method 2
crosslinking of the release agent composition and also of the composition Z1 applied in process step (D)
Data Source
AI summary
Described herein is a manual process for injection molding of coated components, more particularly coated soles of plastic, where first of all the molding tool is lined with a release agent composition and, after flashing of this release agent composition, a composition for forming the component is injected. After crosslinking of these two compositions, the produced coated component is removed from the molding tool and subjected optionally to an aftertreatment.