High Viscosity Thread Application for Dual-Surface Adhesion
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Solution Overview
Problem
Existing methods for applying high viscosity materials, such as adhesives, to both sides of a workpiece are inefficient, requiring multiple steps, multiple application apparatuses, or turning the workpiece, which complicates single-step application and increases costs.
Innovation Solution
A method and apparatus that discharge high viscosity material in the form of a continuous thread from the front surface side of the workpiece, allowing it to pivot around the edge and adhere to the back surface, using an application nozzle with a diameter of 0.5 mm to 0.7 mm, moving in circular motion or along the edge, and utilizing gravity to reduce pressure requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If adhesive is applied to both front and back surfaces using multiple application apparatuses in the same step, then application efficiency is improved, but device complexity and cost increase
Solution Approach 1:
The adhesive application process is segmented into two functional zones using a single apparatus: (1) direct application to the front surface, and (2) side discharge toward the space on the side of the workpiece where adhesive pivots around the edge to the back surface. This segmentation allows one apparatus to perform functions that previously required multiple apparatuses.
Solution Approach 2:
The invention adds a spatial dimension to the application process by discharging adhesive not only toward the front surface but also toward the space on the side of the workpiece. The adhesive discharged to the side pivots around the edge in three-dimensional space to reach the back surface, utilizing spatial geometry to achieve dual-surface application with a single apparatus.
2Device complexity
If adhesive is applied to front surface first then back surface in subsequent steps, then device complexity is reduced, but productivity decreases
Solution Approach 1:
The invention merges the front surface application function and back surface application function into a single application apparatus operating in one step. The apparatus simultaneously discharges adhesive to the front surface and to the side space, with the side-discharged adhesive pivoting to the back surface, thereby combining multiple functions in one device and one operational step.
Solution Approach 2:
The adhesive application to both front and back surfaces occurs continuously in one step without interruption or repositioning. The apparatus maintains continuous discharge of adhesive in thread form to both the front surface and side space, ensuring uninterrupted application to both surfaces simultaneously.
3Device complexity
If workpiece is turned over to apply adhesive to back surface, then single apparatus can be used, but ease of operation decreases and productivity is reduced
Solution Approach 1:
The apparatus is configured in advance with discharge orientations toward both the front surface and the side space. The side discharge position and angle are pre-set so that adhesive naturally pivots around the edge to the back surface under gravity, eliminating the need for preliminary or subsequent workpiece repositioning operations.
4Manufacturing precision
If high viscosity material is discharged in continuous thread form, then application precision is improved, but material breakage risk increases during pivoting
Solution Approach 1:
The invention optimizes physical parameters including discharge pressure, discharge speed, and thread diameter to ensure the adhesive maintains continuous thread form during pivoting. The parameters are controlled so that the adhesive has sufficient cohesion to pivot around the edge without breaking, while maintaining precise application quality on both surfaces.
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
Enables the application of high viscosity materials to both front and back surfaces of a workpiece in a single step, reducing the risk of material breakage and eliminating the need for multiple apparatuses or workpiece turning, thus improving efficiency and cost-effectiveness.
Implementation Method 1
cause the high viscosity material in the form of the thread to adhere to a front surface of the workpiece
Implementation Method 2
cause the high viscosity material discharged in the form of the thread into the space on the side of the workpiece to pivot around an edge of the workpiece to a back surface of the workpiece
Data Source
AI summary
A high viscosity material is discharged in the form of a continuous thread from an application nozzle toward an end of a workpiece and a space S on the side of the workpiece so that the high viscosity material in the form of the thread adheres to a front surface of the workpiece and the high viscosity material discharged in the form of the thread into the space on the side of the workpiece pivots around an edge of the workpiece to a back surface of the workpiece and adheres to the back surface of the workpiece. The high viscosity material can thus be applied to both the front and back surfaces of the workpiece in one step of discharging the high viscosity material only from the front surface side of the workpiece.