Powder Compression Molding Lubricant Flow Control
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Solution Overview
Problem
Conventional powder compression molding machines require separate electrostatic charging devices for die bores and punches, increasing costs and resulting in excessive lubricant application, with uneven lubricant distribution leading to inefficiencies.
Innovation Solution
A powder compression molding machine with a connection member featuring a flow dividing block and tubes of varying diameters to control lubricant flow rates between the downward and upward spray portions, ensuring necessary and sufficient lubricant application to both die bores and punches without altering electrostatic charging intensities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate electrostatic charging devices with different application voltages are installed for downward and upward spray portions, then uniform lubricant application is achieved, but device complexity and cost increase
Solution Approach 1:
The patent applies different flow resistance characteristics to different branches of the lubricant supply system. The downward spray portion receives lubricant through a flow passage with larger diameter and lower resistance, while the upward spray portion receives lubricant through a flow passage with smaller diameter and higher resistance. This local differentiation in flow passage properties achieves uniform lubricant application without requiring separate electrostatic charging devices with different voltages.
2Device complexity
If equal amounts of lubricant are supplied to both downward and upward spray portions, then simplicity is maintained, but excessive lubricant is applied to the upward spray portion
Solution Approach 1:
The patent implements local quality differentiation in the lubricant supply system by providing flow passages with different diameters and resistance characteristics to different spray portions. The upward spray portion, which requires less lubricant, is connected through a flow passage with smaller diameter and higher flow resistance, while the downward spray portion, which requires more lubricant, is connected through a flow passage with larger diameter and lower flow resistance. This enables precise control of lubricant distribution without complicating the overall supply system.
Solution Approach 2:
The patent changes the physical parameter of flow passage diameter to control lubricant flow distribution. By making the inner diameter of the flow passage to the upward spray portion smaller than that of the flow passage to the downward spray portion, the system automatically adjusts the lubricant flow rates according to the different requirements of each spray portion, preventing excessive lubricant application.
3Ease of manufacture
If flow passages of equal diameter are used for both spray portions, then manufacturing simplicity is maintained, but uneven lubricant distribution occurs
Solution Approach 1:
The patent applies local quality differentiation to the flow passages by configuring them with different inner diameters according to the specific lubricant requirements of each spray portion. The flow passage to the upward spray portion has a smaller inner diameter, while the flow passage to the downward spray portion has a larger inner diameter. This localized differentiation in flow passage dimensions achieves uniform lubricant distribution while maintaining relative manufacturing simplicity.
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 configuration allows for precise control of lubricant distribution, reducing waste and ensuring consistent coating on all surfaces, thereby improving the molding process efficiency and reducing costs.
Implementation Method 1
Both of the spray portions are provided with a DC high-voltage electrode in the vicinity of a spray port. The lubricant sprayed from the spray port is electrostatically charged and sticks fast to the inner circumferential surface of the die bore, a tip face of the tip of the lower punch, and a tip face of the tip of the upper punch.
Implementation Method 2
The lubricant sprayed from the spray port is electrostatically charged and sticks fast to the inner circumferential surface of the die bore, a tip face of the tip of the lower punch, and a tip face of the tip of the upper punch.
Data Source
AI summary
A powder compression molding machine includes a downward spray portion that sprays a lubricant toward an inner circumferential surface of a die bore and a tip face of a tip of a lower punch, an upward spray portion that sprays the lubricant toward a tip face of the tip of the upper punch, a first lubricant flow passage through which the lubricant supplied from a lubricant supply device externally provided is fed to the downward spray portion, and a second lubricant flow passage through which the lubricant supplied from the lubricant supply device externally provided is fed to the upward spray portion. A small-diameter region of which an inner diameter is made smaller than that of the first lubricant flow passage is provided at a part of the second lubricant flow passage.