Booster Circuit Layout for High-Frequency Viscous Liquid Discharge
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Solution Overview
Problem
Existing liquid material discharge devices face challenges in increasing productivity by reducing cycle time, especially when discharging highly viscous materials, as they consume more driving air, leading to delayed air pressure restoration and uneven plunger operation.
Innovation Solution
A liquid material discharge device equipped with a booster circuit featuring parallel first and second booster systems that pressurize air, merging it for optimal pressure regulation, and an elastic member to efficiently move the plunger, reducing cycle time and maintaining air pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the discharge frequency is increased to achieve high shot pitch, then productivity is improved, but air consumption increases causing delayed air pressure restoration and uneven plunger operation
Solution Approach 1:
The air supply system is segmented into multiple independent air sources (first air source and second air source), each capable of supplying air to the piston chamber independently. This segmentation allows the system to distribute air consumption across multiple sources, preventing any single source from being depleted too quickly and enabling sustained high-frequency operation.
Solution Approach 2:
The system performs preliminary action by pre-positioning multiple air sources and establishing redundant air supply paths before high-frequency discharge operation begins. This ensures that when high shot pitch operation is initiated, the air pressure restoration capability is already in place, preventing delays and uneven plunger operation from the outset.
2Force
If the pressure of driving air is raised to discharge highly viscous material, then discharge capability is improved, but air consumption increases further extending cycle time
Solution Approach 1:
The air supply is segmented into multiple sources that can each operate at optimized pressure levels. By distributing the high-pressure demand across multiple sources, the system maintains the necessary driving force for viscous material discharge without requiring any single source to deplete its pressure reserves rapidly, thus avoiding cycle time extension.
Solution Approach 2:
The system changes the parameter of air supply by introducing multiple air sources with potentially different pressure characteristics. This allows optimization of the overall air pressure delivery system to maintain high driving pressure for viscous material while managing total air consumption to prevent cycle time extension.
3Device complexity
If a single air source is used to drive the plunger, then device complexity is reduced, but air pressure restoration is delayed at high discharge frequencies
Solution Approach 1:
The air supply system is divided into multiple independent air sources (first air source and second air source), each capable of independently supplying air to the piston chamber. This segmentation provides redundancy and ensures that if one air source is depleted, the other can immediately compensate, maintaining reliable air pressure restoration even at high discharge frequencies.
Solution Approach 2:
The system changes the configuration parameter of the air supply from a single source to multiple sources, fundamentally altering the pressure restoration capability. This parameter change enables the system to maintain reliable operation at high discharge frequencies by distributing the air consumption load across multiple sources.
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 device achieves high shot pitch discharge with reduced cycle time and stable air pressure, even at high frequencies, effectively handling highly viscous materials without air pressure shortages.
Implementation Method 1
an elastic member (4) that urges the plunger (3) in the forward direction
Implementation Method 2
a booster circuit (80) that boosts pressure of driving air to be supplied to the piston chamber (20)
Data Source
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AI summary
[Problem] To provide a liquid material discharge device capable of reducing a cycle time. [Solution] A liquid material discharge device comprises a liquid chamber that is communicated with a discharge port and is supplied with a liquid material; a plunger including a piston formed at a rear end thereof and having a tip portion that is moved back and forth in the liquid chamber; an elastic member that applies an urging force to the plunger; a piston chamber in which the piston is disposed and to which pressurized gas is supplied; and a pressure supply device that supplies, to the piston chamber, air pressurized in excess of the urging force of the elastic body, or that purges pressurized air out of the piston chamber, the liquid material discharge device discharging the liquid material from the discharge port by causing the plunger to move forward and applying an inertial force to the liquid material. The liquid material discharge device further comprises a booster circuit that communicates the pressure supply device and an air source with each other, and the booster circuit includes a first booster system including a booster valve and a pressure reducing valve, a second booster system including a booster valve and a pressure reducing valve, and a merging section in which the first booster system and the second booster system merge together.