Threadlike Adhesive Nozzle Motion for Accurate Start-Point Sticking
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Solution Overview
Problem
Existing methods for sticking threadlike adhesives face challenges in ensuring accurate adhesion at the start point due to insufficient initial adhesion, with threadlike adhesives often entering the nozzle during the initial application process.
Innovation Solution
A threadlike adhesive sticking apparatus and method that control the angle and speed of the nozzle's movement to ensure the adhesive protrudes correctly from the nozzle tip, using specific angle and speed ranges to prevent entry into the nozzle and improve adhesion accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the nozzle is lowered in an oblique direction to create a start point, then the threadlike adhesive can be applied to the surface, but the adhesive may enter the nozzle causing poor sticking accuracy
Solution Approach 1:
The patent applies parameter changes by precisely controlling the nozzle lowering angle θ1 within the range of π/36 to 4π/9 (5° to 80°). This angular parameter control prevents the adhesive from entering the nozzle while ensuring proper contact with the surface, thereby resolving the contradiction between achieving sticking accuracy and preventing adhesive entry into the nozzle.
2Productivity
If the nozzle moves too quickly to the sticking start point, then productivity increases, but the adhesive cannot be properly pressed against the surface reducing adhesion
Solution Approach 1:
The patent applies dynamics by optimizing the moving speed a of the nozzle within the range of 1.0 to 40.0 mm/sec. This dynamic speed control ensures that the adhesive is properly pressed against the surface for reliable adhesion while maintaining efficient productivity. The moving mechanism adjusts the speed to balance adhesion quality and production efficiency.
3Ease of operation
If the extra length portion of adhesive is too long, then the adhesive can reach the surface easily, but it may enter the nozzle causing sticking failure
Solution Approach 1:
The patent applies parameter changes by establishing a specific relationship between the extra length L and outer diameter R of the adhesive: L/R ≥ 5.0. This parameter control ensures the adhesive is long enough to reach the surface easily while being controlled in length to prevent entry into the nozzle, thus resolving the contradiction between ease of delivery and sticking accuracy.
4Ease of manufacture
If the nozzle is lowered vertically to the surface, then the adhesive application is simple, but the adhesive enters the nozzle reducing sticking accuracy
Solution Approach 1:
The patent applies asymmetry by changing the nozzle lowering direction from vertical (symmetrical) to oblique (asymmetrical). The nozzle is lowered at an angle θ1 between π/36 and 4π/9 relative to the surface normal, creating an asymmetric approach that prevents adhesive entry into the nozzle while maintaining ease of operation. This asymmetric movement resolves the contradiction between manufacturing simplicity and sticking accuracy.
Data Source
AI summary
A threadlike adhesive sticking apparatus, for sticking a threadlike adhesive to an object by pressing a part of the threadlike adhesive protruding from a tip end portion of a nozzle to an outside against a surface of the object, includes a moving mechanism configured to move the nozzle. The moving mechanism moves the nozzle such that an angle θ1 (rad) formed by the surface and a moving direction of the nozzle to a sticking start point on the surface is π/36≤θ1≤4π/9.