Pressure Control Device for Surface Mount Nozzles
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Solution Overview
Problem
Existing pressure control systems for surface mount machines are inefficient due to fixed positive pressures, leading to instability and increased costs, as they require additional air circuits and expensive electric-control reducing valves, which can result in improper pressure application times causing part misalignment or ejection during mounting and cleaning processes.
Innovation Solution
A pressure control device and method that includes a switch-over valve and controller to selectively supply gas at two different positive pressures and an intermediate pressure, allowing for stable pressure control within a wide range, reducing the need for additional air circuits and minimizing the use of expensive components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple fixed positive pressure air circuits are used to supply different pressures to the nozzle, then the nozzle can receive stable fixed pressures for different functions, but the device complexity increases due to the need for additional air circuits
Solution Approach 1:
The patent applies a dynamic pressure control approach by replacing multiple fixed-pressure air circuits with a single variable-pressure air circuit controlled by a reducing valve. This allowing the system to dynamically adjust the positive pressure supplied to the nozzle based on operational requirements, thereby maintaining pressure stability while reducing the number of air circuits needed
Solution Approach 2:
The patent implements a universal pressure control system where a single air circuit with a reducing valve serves multiple functions that previously required separate dedicated circuits. The reducing valve enables one air circuit to provide varying positive pressures for different operations (cleaning, mounting, discarding), making the system multi-functional and reducing overall complexity
2Device complexity
If an electric-control reducing valve is used to control positive pressure, then the number of air circuits is reduced, but the machine cost increases due to the expensive valve
Solution Approach 1:
The patent replaces the expensive electric-control reducing valve with a mechanically-operated reducing valve that is controlled by pneumatic signals from the control unit. This substitution eliminates the need for expensive electric actuators and electronic control systems while maintaining the same pressure control functionality, thereby reducing machine cost while keeping the air circuit structure simple
3Ease of operation
If the positive pressure application time is not strictly controlled, then the system operation becomes simpler, but the manufacturing precision deteriorates due to part misalignment or ejection
Solution Approach 1:
The patent implements a feedback-controlled pressure application system where the control unit monitors operational status and automatically adjusts the timing of positive pressure application through the reducing valve. This feedback mechanism ensures that positive pressure is applied for the precise duration needed for each operation (cleaning, mounting, discarding), maintaining manufacturing precision while keeping the operation simple through automated control
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 enables stable and precise control of nozzle pressures, ensuring proper part mounting, cleaning, and discarding by allowing selective switching between high, low, and intermediate pressures, thereby improving process stability and reducing machine costs.
Implementation Method 1
a switch-over valve that selectively switches between a first connected state in which the first positive pressure supply pathway is connected to the nozzle connecting pathway and a second connected state in which the second positive pressure supply pathway is connected to the nozzle connecting pathway
Implementation Method 2
a first positive pressure supply pathway to supply the gas at a first positive pressure; a second positive pressure supply pathway to supply the gas at a second positive pressure that is lower than the first positive pressure
Data Source
AI summary
The pressure of a gas supplied to a nozzle is stably controlled over a wide range. A first positive pressure supply pathway supplies the gas at a first positive pressure. A second positive pressure supply pathway supplies the gas at a second positive pressure that is lower than the first positive pressure. A nozzle connecting pathway is connected to the nozzle. A switch-over valve selectively switches between a first connected state in which the first positive pressure supply pathway is connected to the nozzle connecting pathway and a second connected state in which the second positive pressure supply pathway is connected to the nozzle connecting pathway. A valve controller controls the connected state of the switch-over valve and adjusts the pressure of the gas supplied to the nozzle within the range from the first positive pressure to the second positive pressure.