Nozzle Structure for Powder Compression Molding Lubricant Delivery
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Solution Overview
Problem
Conventional rotary powder compression molding machines experience inefficiency due to powder lubricant adhering to non-target regions, leading to increased waste and reduced molding efficiency.
Innovation Solution
A nozzle structure with a guide path and spraying portion aligned with the direction of punch displacement, combined with electric field generation means to ensure precise lubricant adhesion to punches and dies, reducing waste and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the powder lubricant is sprayed along the three-dimensional curved surface in the nozzle with concave portion, then the lubricant coverage area is increased, but the lubricant scatters into a relatively large area causing it to adhere to regions other than target region
Solution Approach 1:
The nozzle is divided into two functional parts: a guide path for directing lubricant flow and a spraying portion for precise delivery. This segmentation allows the lubricant to be guided along a controlled path and sprayed only where needed, preventing scattering across the three-dimensional curved surface while maintaining adequate coverage of the target region.
Solution Approach 2:
The guide path acts as an intermediary element between the lubricant supply and the spraying portion. It channels and directs the lubricant flow in a controlled manner, ensuring that the lubricant reaches the spraying portion in an organized flow rather than scattering across the curved surface, thus reducing waste while maintaining coverage.
2Quantity of substance
If the spray nozzle sprays powder lubricant along the three-dimensional curved surface, then the lubricant is distributed over a larger area, but the quantity of lubricant that does not adhere to the target region increases
Solution Approach 1:
The spraying portion is designed to deliver lubricant locally and precisely to the target region (punch surfaces and die interior) rather than distributing it broadly across the curved surface. This localized spraying ensures that the lubricant quantity is concentrated where it is needed for molding, improving productivity by reducing waste while maintaining adequate lubrication coverage.
Solution Approach 2:
The nozzle structure allows for dynamic adjustment of lubricant delivery through the guide path and spraying portion configuration. The guide path can be designed with varying cross-sections and the spraying portion can be positioned to optimize lubricant delivery dynamics, ensuring efficient adhesion to target regions while minimizing scatter and waste.
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 solution significantly reduces the amount of lubricant not adhering to the target regions, enhancing the overall efficiency of the lubricant usage and improving the adhesion accuracy to punches and dies.
Implementation Method 1
electric field generation means that charges the lubricant sprayed near the spraying portion
Implementation Method 2
the powder lubricant is charged electrostatically and differently so as to adhere to each of an upper punch, a lower punch and the die
Data Source
AI summary
A nozzle structure is mounted in a compression molding machine that compresses using a punch a powder material filled in a die to manufacture a compressively molded product, and sprays a lubricant at least toward a tip of the punch prior to filling the powder material and includes a guide path that guides the lubricant, and a spraying portion that is provided at an end of the guide path so as to communicate therewith and that sprays the lubricant guided along the guide path so as to be substantially aligned with a predetermined straight line intersecting at least in a direction of relative displacement of the punch.