Heated Silicone Die Embossing for Structured Plastic Decoration
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Solution Overview
Problem
Current processes for creating structured decorations on plastic surfaces are time-consuming, costly, and require the use of solvents, inks, and carrier films, limiting versatility and efficiency.
Innovation Solution
A process using a silicone rubber die with a surface structure of less than 250 µm roughness depth to directly emboss structured decorations onto plastic surfaces without the need for molds, solvents, inks, or carrier films, utilizing a heating printing machine to apply the die at temperatures between 100 to 300°C.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional injection molding with engraved molds is used to create structured decoration on plastic surfaces, then the decoration can be integrated into the plastic surface, but the process becomes time-consuming and expensive due to the need for new molds for each new decoration design
Solution Approach 1:
The patent uses a silicone rubber die that can be easily copied or replicated to transfer decorative patterns onto plastic surfaces. The die contains the decorative pattern and can be reused multiple times without needing to create new molds for each decoration design, thus reducing time and cost while maintaining integration of the decoration into the plastic surface.
Solution Approach 2:
The patent changes the physical state of the plastic surface by heating it to a specific temperature range (100-300°C) to make it more receptive to the decorative pattern transfer. This parameter change allows the plastic surface to be modified without requiring new molds, as the heated plastic can be imprinted with the silicone rubber die containing the desired decoration.
2Manufacturing precision
If traditional hot-stamping processes are used to transfer decorative elements, then structured decoration can be achieved, but the process requires carrier films, solvents, and inks which increases complexity and cost
Solution Approach 1:
The patent extracts and eliminates the need for carrier films, solvents, and inks from the hot-stamping process. By using a silicone rubber die that directly transfers the decorative pattern onto the heated plastic surface, the process achieves structured decoration without requiring these additional materials, thus reducing complexity and cost while maintaining precision.
Solution Approach 2:
The silicone rubber die serves multiple functions simultaneously: it acts as the decorative pattern carrier, the transfer medium, and the molding tool. This self-service approach eliminates the need for separate carrier films and other auxiliary materials, simplifying the overall process while maintaining the quality of structured decoration.
3Adaptability or versatility
If printing processes are used to decorate plastic surfaces, then decorations can be applied without molds, but the decoration is only printed and does not add structured decoration to the plastic surface
Solution Approach 1:
The patent replaces the printing process with a mechanical transfer process using a silicone rubber die. Instead of merely printing a decoration onto the plastic surface, the die physically transfers the three-dimensional decorative pattern onto the heated plastic, creating actual structured decoration with depth and texture while maintaining the flexibility of application.
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
Enables faster, cost-effective, and more precise structured decorations on plastic surfaces, allowing for both matte and shiny effects without the complexity of traditional methods.
Implementation Method 1
heating the die (3), bringing the die (3) in contact with the plastic surface (1) of the product part (2) to modify said surface (1)... utilizing a heating printing machine to apply the die at temperatures between 100 to 300°C
Data Source
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AI summary
A process for modifying a plastic surface (1) comprised in a product part (2) is disclosed, the process comprising the steps of: a) mounting a die (3) into a heating printing machine, b) heating the die (3), c) bringing the die (3) in contact with the plastic surface (1) of the product part (2) to modify said surface (1). The present invention also relates to an article comprising a modified plastic surface (1) obtainable by the inventive process, as well as a cosmetic package.