Protective Sheet Release Bonding with Segmented Stamp Heads
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Solution Overview
Problem
Existing sheet release apparatuses either damage the adherend by excessive adhesive force or fail to maintain the release tape due to insufficient bonding, leading to unstable sheet release.
Innovation Solution
A sheet release apparatus with a conveyance mechanism and bonding means using multiple stamp heads to apply a release force, reducing adhesive force and maintaining stable bonding through spaced contact points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the release tape is bonded to the protective sheet in a large area, then the adhesive force between the release tape and the protective sheet increases, but the adherend may greatly spring up to follow the protective sheet and be damaged
Solution Approach 1:
The bonding means is divided into multiple stamp heads (first stamp head, second stamp head, third stamp head) that contact the release tape at different positions. This segmentation distributes the bonding force across multiple discrete contact points rather than a continuous large-area bond, reducing the overall adhesive force while maintaining stable bonding at each point.
Solution Approach 2:
Each stamp head has a contact surface with a specific shape (substantially circular, rectangular, or triangular) that creates a localized bonding zone. The bonding characteristics vary at different positions on the release tape, with each stamp head providing optimized local bonding quality appropriate for its position, rather than uniform bonding across the entire surface.
2Object-affected harmful factors
If the release tape contacts the protective sheet in a small area, then the adhesive force between the release tape and the protective sheet decreases, but the tension exerted on the protective sheet may be larger than the adhesive force causing the release tape to come off
Solution Approach 1:
Multiple stamp heads create multiple discrete bonding zones along the release tape. Even if bonding fails at one location, other bonding zones maintain the connection between the release tape and protective sheet, ensuring reliable overall bonding without requiring large-area contact at each individual stamp head.
Solution Approach 2:
The stamp heads bond the release tape to the protective sheet at predetermined positions before the release process begins. This preliminary bonding at multiple strategic locations ensures that the release tape is securely attached at key points, maintaining reliability throughout the subsequent release operation.
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
Stable release of protective sheets without damaging the adherend, preventing excessive springing and maintaining tape adherence.
Implementation Method 1
an adhesive force between the release tape and the protective sheet is reduced by the plurality of stamp heads each bonding the release tape to the protective sheet at respective positions spaced apart from one another
Data Source
AI summary
A sheet release apparatus that stably releases a protective sheet from an adherend without damaging the adherend. A sheet release apparatus includes a conveyance table that is movable in a predetermined movement direction with an adherend held therein and a heat stamp that bonds a release tape to a protective sheet, in which the heat stamp includes a plurality of stamp heads that each contact the release tape to press the release tape toward the protective sheet.