Robotic Arm Automates Stencil Printer Changeover
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Solution Overview
Problem
Stencil printers in surface-mount technology require manual intervention for routine operations such as changeover, replacement, and replenishment of parts, leading to inefficiencies and downtime in PCB fabrication lines.
Innovation Solution
The implementation of a movable cart system and robotic arm to automate the changeover and replenishment processes, allowing for the automated delivery and receipt of stencils, solder paste cartridges, squeegee blades, and tooling, reducing the need for manual intervention and enabling continuous operation of stencil printers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual operations are used for changing stencils, replacing cartridges, and更换 squeegee blades, then the operator can perform these tasks, but the changeover time increases significantly (up to 30 minutes) and production downtime increases
Solution Approach 1:
The system enables automated self-service through the robotic arm that automatically performs changeover operations including removing old stencils, installing new stencils, replacing solder paste cartridges, and changing squeegee blades without human intervention, thereby eliminating the 30-minute manual changeover time and associated production downtime
Solution Approach 2:
The patent replaces the manual mechanical operation system with an automated robotic arm system equipped with sensors and controllers. The robotic arm uses vision systems and automated gripping mechanisms to perform tasks that previously required human hands and eyes, transforming manual mechanical operations into automated mechano-optical systems
2Ease of operation
If manual intervention is required for routine operations, then the operator can monitor and adjust the process, but the operational efficiency decreases and continuous production is interrupted
Solution Approach 1:
The system incorporates sensors and vision systems that continuously monitor the printing process, stencil position, solder paste levels, and squeegee blade condition. This feedback is transmitted to the controller which automatically adjusts parameters and triggers maintenance operations, replacing manual monitoring with automated sensor-based feedback loops that enable continuous uninterrupted production
Solution Approach 2:
The robotic arm system performs self-service maintenance by automatically detecting when stencils, cartridges, or squeegee blades need replacement and executing the changeover operations without human intervention, thereby maintaining operational efficiency and enabling continuous production while previously manual monitoring would have interrupted the process
Data Source
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AI summary
A stencil printer includes a frame, a stencil coupled to the frame, the stencil having apertures formed therein, a support assembly coupled to the frame, the support assembly including tooling configured to support the electronic substrate in a print position beneath the stencil, a print head assembly coupled to the frame in such a manner that the print head assembly is configured to traverse the stencil during print strokes, the print head assembly including a squeegee blade assembly and at least one paste cartridge to deposit solder paste on the stencil, and a robotic arm configured to perform functions within the stencil printer.