Nozzle Head Pressure Response in Component Mounters
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Solution Overview
Problem
Automatic head exchange type component transfer devices experience reduced responsiveness and increased mounting time when switching from negative to positive pressure in single nozzle heads due to limitations in maintaining positive pressure, especially when exchanging multiple nozzle heads.
Innovation Solution
The component transfer device incorporates a pickup/mounting driving section that cuts off the suction nozzle from the negative pressure source, connects it to the atmosphere to introduce outside air, and then to a positive pressure source, enhancing the responsiveness and reducing the time required for mounting by assisting the pressure rise with both atmospheric and positive pressure sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a common pickup/mounting driving section is used for both single nozzle head and multiple nozzle head in automatic head exchange type component transfer devices, then head exchange automation is achieved, but the responsiveness when raising internal pressure of suction nozzle is reduced and mounting time is increased
Solution Approach 1:
The pickup/mounting driving section is segmented into two independent pressure sources: a negative pressure source for suction nozzle activation and a positive pressure source for rapid pressure equalization. This segmentation allows the system to maintain automation while optimizing the pressure transition speed for single nozzle head operations.
Solution Approach 2:
The positive pressure source is pre-positioned and ready to act immediately when the single nozzle head is installed. The system preliminarily prepares both pressure sources so that when mounting operation is required, the positive pressure can rapidly equalize the suction nozzle pressure without waiting for sequential pressure changes.
2Device complexity
If only a positive pressure source is used to raise the internal pressure of the suction nozzle, then system simplicity is maintained, but the responsiveness and speed of pressure rise is insufficient
Solution Approach 1:
The system merges two pressure sources (negative pressure source and positive pressure source) into a unified pickup/mounting driving section. The negative pressure source creates suction for component pickup, while the positive pressure source rapidly equalizes pressure for mounting. This combination achieves fast pressure response while maintaining reasonable system complexity through shared control infrastructure.
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
This solution improves the responsiveness and reduces the time needed for mounting by rapidly increasing the internal pressure of the suction nozzle, even when using limited positive pressure sources, while maintaining stability and efficiency across single and multiple nozzle heads.
Implementation Method 1
picks up a component from a supply position by making the internal pressure of the suction nozzle negative
Implementation Method 2
mounts the component on a board held at a fixed position by raising the internal pressure of the suction nozzle
Data Source
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AI summary
The present invention of component transfer device of a component mounter is provided with a single nozzle head and multiple nozzle heads which are automatically exchangeable, a pickup/mounting driving section that connects to a suction nozzle of a single nozzle head held on a head holding section and a selected suction nozzle of a multiple nozzle head held on the head holding section and that raises/lowers the internal pressure of the suction nozzle, wherein the pickup/mounting driving device, when making the suction nozzle of the held single nozzle head mount a component, cuts off the suction nozzle from a negative pressure source and connects the suction nozzle to a positive pressure source and the atmosphere. This makes the responsiveness good when the internal pressure of the suction nozzle of the single nozzle head is being raised, which reduces the time required for mounting.