Screen Printing Mesh Stretching With Uniform Tension Control
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Solution Overview
Problem
Existing mesh stretching apparatuses for screen printing are bulky, difficult to operate, lack uniform stretching force, and fail to prevent frame motion, leading to wrinkles and inefficient adhesive application.
Innovation Solution
A compact apparatus with linear actuators and clamps, featuring a piston arrangement and a locking mechanism, provides uniform stretching force and prevents frame motion, while allowing for adhesive application and wrinkle prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional bulky apparatus is used for stretching mesh, then stretching function is provided, but device complexity and ease of operation deteriorate
Solution Approach 1:
The apparatus divides the stretching function into multiple independent linear actuators, each responsible for stretching the mesh in a specific direction. This segmentation allows for more precise control and easier operation while reducing the overall complexity compared to a single bulky mechanism
Solution Approach 2:
The patent replaces traditional mechanical stretching mechanisms with linear actuators that use electromagnetic or hydraulic principles. This substitution eliminates the need for complex mechanical linkages and manual operation, improving ease of operation while reducing device complexity
2Manufacturing precision
If traditional apparatus is used, then mesh stretching is achieved, but manufacturing precision deteriorates due to lack of uniform stretching force
Solution Approach 1:
The apparatus uses multiple linear actuators distributed around the mesh, with each actuator applying force independently in its specific direction. This segmentation ensures uniform stretching force distribution across the entire mesh, improving manufacturing precision
Solution Approach 2:
The linear actuators can independently adjust their extension parameters to compensate for variations in mesh tension and frame geometry. This parameter adjustment capability ensures uniform stretching force and precise mesh tensioning, improving manufacturing precision
3Reliability
If traditional apparatus is used, then stretching function is provided, but reliability deteriorates due to frame motion during stretching
Solution Approach 1:
The apparatus incorporates clamps that engage with the frame before the stretching process begins. These clamps prevent frame motion during stretching by applying counteracting forces, thereby improving reliability and preventing wrinkles caused by frame displacement
Solution Approach 2:
The clamps act as intermediary elements between the frame and the linear actuators. They transfer and stabilize the forces applied during stretching, preventing direct transmission of unwanted frame motion and ensuring reliable stretching operation
4Productivity
If traditional apparatus is used, then stretching is achieved, but productivity deteriorates due to laborious clamping and adhesive application
Solution Approach 1:
The apparatus performs clamping action automatically as part of the stretching process. The linear actuators and clamps work together to secure the mesh to the frame before adhesive application, eliminating manual clamping steps and improving productivity
Solution Approach 2:
The apparatus combines the stretching and clamping functions into a single integrated operation. The linear actuators simultaneously stretch the mesh and engage the clamps to secure it to the frame, reducing the number of separate steps and improving both productivity and ease of 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
The apparatus ensures uniform stretching, prevents frame motion, and facilitates easy adhesive application, enhancing the quality and accuracy of screen printing.
Implementation Method 1
a corresponding piston arrangement adapted to move from a retracted position to an elongated position upon actuated by a working fluid
Implementation Method 2
The one or more clamps are adapted to stretch the mesh corresponding to movement of the corresponding piston arrangement
Implementation Method 3
the apparatus lacks features to prevent relative motion of the frame with respect to the apparatus thereby undermining the stretching process. Retrofitting the apparatus to obtain higher force to mass ratio is expensive. Also, the apparatus is incapable of preventing formation of wrinkles on the mesh when the mesh is being stretched
Data Source
AI summary
An apparatus (10) for stretching a mesh for screen printing is provided. The apparatus includes a plurality of linear actuators (20) mounted on a corresponding base (30). The plurality of linear actuators includes a corresponding piston arrangement (40) adapted to move from a retracted position (50) to an elongated position (60) upon actuated by a working fluid. The apparatus also includes one or more clamps (70) operatively coupled to the corresponding piston arrangement. The one or more clamps are adapted to stretch the mesh corresponding to movement of the corresponding piston arrangement, thereby stretching the mesh for screen printing. The mesh is adapted to be stretched over a frame (80) located on the base of the corresponding plurality of linear actuators.