Stretchable Release Layer for Rotary Screen Printing
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Solution Overview
Problem
Rotary screen printing machines face difficulties in efficiently removing articles, such as bags, due to varying sizes and adhesive issues, which can lead to damage and increased production costs.
Innovation Solution
A system with a pallet and a releasing station that uses a stretchable layer to overcome adhesive forces, allowing for easy removal of substrates without damaging them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a stronger puller is used to pull bags off the pallet, then the pulling force is increased, but the bags are ripped or damaged
Solution Approach 1:
A releasing agent is applied to the pallet surface before the bag is attached with adhesive. This preliminary application of the releasing agent creates a conditional surface that allows controlled release later, enabling the bag to be removed without excessive force that would cause damage.
Solution Approach 2:
The patent changes the chemical parameters of the pallet surface by applying a releasing agent that modifies the surface properties. This creating a surface with controlled adhesion characteristics - strong enough to hold the bag during printing but weak enough to allow easy release without damaging the bag.
2Manufacturing precision
If tack adhesive is applied to the pallet to hold bags in position, then printing accuracy is improved, but bag removal becomes difficult
Solution Approach 1:
The releasing agent is applied to the pallet surface before the adhesive is applied to the bag. This preliminary action creates a surface condition that modifies the adhesive bonding characteristics, allowing the adhesive to hold the bag securely during printing while enabling easy release afterward by overcoming the reduced adhesion.
Solution Approach 2:
The releasing agent acts as an intermediary substance between the pallet surface and the adhesive-bag assembly. It mediates the interaction by providing a surface that allows controlled adhesion during printing but facilitates easy release during removal, thus resolving the contradiction between holding strength and release ease.
3Stability of the object's composition
If adhesive is applied directly to the pallet to hold various sizes of bags, then position stability is improved, but removal difficulty increases due to varying sizes and materials
Solution Approach 1:
The releasing agent modifies the surface parameters of the pallet to create a uniform interface that works with various bag sizes and materials. By changing the surface energy and adhesion characteristics, it enables consistent positioning across different substrates while maintaining ease of removal regardless of bag variability.
Solution Approach 2:
The releasing agent provides a universal surface treatment that works with all types of bags regardless of size or material composition. It creates a standardized interface between the pallet and diverse substrates, enabling both stable positioning during printing and easy removal afterward, thus making the system universally applicable to various bag types.
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 system effectively minimizes substrate damage and production costs while maintaining printing precision by uniformly releasing substrates of various sizes and materials from the pallets.
Implementation Method 1
a layer disposed intermediate the pallet and the substrate. A releasing station selectively stretches the layer to release a surface of the substrate from a state of adhesion with the pallet
Data Source
AI summary
A releasing system for a printing machine includes a pallet configured to support a substrate for receiving indicia printed thereon. A layer is disposed intermediate the pallet and the substrate. A releasing station selectively stretches the layer to release a surface of the substrate from a state of adhesion with the pallet.