Affixing Device With Variable Extrusion for End Turn-Up Control
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Solution Overview
Problem
Existing sticking apparatuses fail to adequately prevent the turning-up of the ends of sticking bodies with elastomer material after initial adherence, necessitating improvement.
Innovation Solution
A sticking apparatus with an extrusion mechanism, support, and transport mechanism, controlled by a control unit, extrudes and positions the sticking body to generate tensile and compressive stresses alternately, ensuring the sticking body is in a tension or slightly pressed state, thereby suppressing end turning-up.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sticking body is extruded and stuck to the adherend using conventional methods, then initial sticking is achieved, but the end of the sticking body turns up over time
Solution Approach 1:
The patent applies dynamics by controlling the extrusion speed to vary over time. The extrusion speed is set to be slower than the head member movement speed during the initial sticking phase, then faster during the middle phase, and slower again during the final phase. This dynamic speed adjustment creates alternating tensile and compressive stresses that prevent end turning-up while maintaining reliable sticking.
Solution Approach 2:
The patent changes the extrusion speed parameter dynamically during the sticking process. By adjusting the extrusion speed relative to the head member movement speed at different time points (first, second, and third time points), the system creates different stress states (tensile and compressive) in the sticking body to prevent end turning-up while ensuring durable adherence.
2Productivity
If the sticking body is extruded at high speed, then productivity is improved, but tensile stress generates slack and causes peeling
Solution Approach 1:
The patent uses dynamic control of extrusion speed to balance productivity and reliability. The extrusion speed is not constant but varies in three phases: slower initially to create tensile stress, faster in the middle to maintain productivity, and slower again at the end to ensure proper adherence. This dynamic approach prevents both peeling and end turning-up while maintaining efficient operation.
Solution Approach 2:
The patent implements periodic action by creating alternating tensile and compressive stress cycles in the sticking body through controlled extrusion speed variations. The extrusion speed is adjusted to be slower than head member speed during initial and final phases (creating tensile stress), and faster during the middle phase (creating compressive stress). This periodic stress pattern prevents peeling while maintaining productivity.
3Reliability
If the sticking body is extruded at low speed, then tensile stress prevents peeling, but productivity decreases
Solution Approach 1:
The patent resolves this contradiction through dynamic extrusion speed control. Instead of maintaining low speed throughout, the system uses low speed only during specific phases (initial and final) when tensile stress is needed to prevent peeling. During the middle phase, the extrusion speed increases to maintain productivity. This dynamic timing ensures peel resistance without permanently sacrificing productivity.
Solution Approach 2:
The patent applies periodic action by implementing alternating speed patterns that create periodic tensile and compressive stress cycles. Low extrusion speed creates tensile stress for peel resistance during initial and final phases, while high extrusion speed creates compressive stress for productivity during the middle phase. This periodic alternation ensures both reliability and productivity are achieved at different time periods.
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 apparatus effectively suppresses peeling and end turning-up of sticking bodies by controlling the extrusion and transport mechanisms to generate alternating tensile and compressive stresses, maintaining adherence over time.
Implementation Method 1
tensile stress is generated inside of the sticking body, and the sticking body is stuck in a tension state
Implementation Method 2
compressive stress is generated inside of the sticking body
Implementation Method 3
an adhesive layer 61 including an elastomer material having adhesiveness
Data Source
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AI summary
To provide a sticking apparatus capable of suppressing turning-up of an end of a sticking body. A sticking apparatus extrudes a sticking body from a tip in a protruding direction of a head member while moving the tip in a protruding direction of the head member along a target range, and sticks the sticking body to the target range. Extrusion speed of the sticking body becomes smaller than movement speed of the head member from a start of sticking of the sticking body with respect to the target range to a first time point, extrusion speed of the sticking body becomes larger than movement speed of the head member from the first time point to a second time point, and extrusion speed of the sticking body becomes smaller than movement speed of the head member from the second time point to sticking completion of the sticking body with respect to the target range.