Customizable Shrink Wrap Film Preheating Method
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Solution Overview
Problem
Conventional shrink wrapping methods often result in wrinkles and cosmetic defects when applied to larger products or those with complex geometries, which detract from the aesthetic appeal of consumer products like electronic devices.
Innovation Solution
A method involving preheating the external surface of a product to ensure uniform heating and shrinking of the shrink wrap film, which is then positioned around the product to conform to its shape without wrinkles, using a controlled heating process to match the product's geometry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional shrink wrapping methods are used on larger products or products with edges, corners and curves, then the shrink wrap can be applied to cover the product, but the shrink wrap heats up unevenly resulting in wrinkles and cosmetic defects
Solution Approach 1:
The product is preheated before the shrink wrap is applied, so that when the shrink wrap contacts the product, the heat is already distributed uniformly throughout the product surface. This preliminary heating action prevents uneven heating during the shrink wrapping process, eliminating wrinkles and cosmetic defects on the final packaged product
2Productivity
If the shrink wrap is heated by placing it and the product in a convection oven, then the hot air from the convection oven heats and shrinks the shrink wrap onto the product, but the shrink wrap heats up unevenly on larger products or products with complex geometries
Solution Approach 1:
The product is preheated in a controlled manner before shrink wrapping, ensuring uniform heat distribution across the product surface. This preliminary action allows the subsequent shrink wrapping to proceed uniformly, maintaining both productivity and manufacturing precision
Solution Approach 2:
The product itself acts as an intermediary heat transfer medium. By preheating the product, the heat is transferred uniformly from the product surface to the shrink wrap film, rather than relying on hot air convection which creates uneven heating. This intermediary approach ensures uniform shrink wrap conforming
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 method achieves a wrinkle-free, custom-fit shrink wrap that enhances the cosmetic appeal and tactile experience of packaged products by ensuring uniform heating and conforming to complex shapes.
Implementation Method 1
heating an external surface of the part
Implementation Method 2
shrinking the shrink wrap film over the external surface of the part. During the shrinking, the shrink wrap film contacts the heated external surface of the part causing the shrink wrap film to take on a contracted state having a shape that matches the shape of the external surface
Implementation Method 3
During the shrinking, the heated external surface of the part heats the inner surface of the shrink wrap causing uniform heating and shrinking of the shrink wrap film around the external surface of the part
Data Source
AI summary
Shrink wrap films that are customized to have a shape matching a shape of a particular part or parts are disclosed. The shrink wrap films can be formed using unique manufacturing techniques that involve heating the part or parts prior to applying the shrink wrap film. The resultant part or parts will have substantially wrinkle-free and defect-free shrink wrap film applied thereon. In some embodiments, additional functional and cosmetic features are formed in the shrink wrap film. In some embodiments, a laser cutting procedure is used to form the features in the shrink wrap film. Methods can be used to provide visually and tactilely smooth and aesthetically appealing shrink wrapped consumer products.