Powder Compression Molding With Two-Speed Pressing for Hardness
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Solution Overview
Problem
Existing methods for producing compressed bodies of powder face a trade-off between hardness and production efficiency, as increasing hardness typically decreases production rate.
Innovation Solution
A two-step compression process is employed, where the powder is first compressed at a high speed and then at a lower speed to achieve the desired thickness, balancing hardness and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If compression speed is reduced to increase hardness, then hardness of compressed body is improved, but production rate decreases
Solution Approach 1:
The compression process is divided into two distinct stages: a first compression step at a first compression speed, and a second compression step at a second compression speed that is lower than the first compression speed. This segmentation allows each stage to serve a specific function - the first stage provides rapid compression for efficiency, while the second stage applies slower compression to enhance hardness, thereby resolving the contradiction between production rate and hardness.
2Stability of the object's composition
If porosity is increased to improve solubility, then solubility is enhanced, but hardness decreases
Solution Approach 1:
The invention changes the compression speed parameter during the compression process. By transitioning from a higher compression speed in the first step to a lower compression speed in the second step, the process optimizes both porosity and hardness. The reduced compression speed in the second step allows for controlled pore formation that maintains solubility while achieving the desired hardness, resolving the contradiction between these two properties.
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 method enhances the hardness of the compressed body while minimizing the decrease in production rate, resulting in improved product quality and production efficiency.
Implementation Method 1
a first compression step of compressing the powder at a first compression speed; and a second compression step of compressing the compressed body of the powder compressed in the first compression step at a second compression speed that is lower than the first compression speed
Data Source
AI summary
Provided is a method for producing a compressed body of a powder capable of improving a hardness while suppressing a decrease in production efficiency of the compressed body of the powder. A compressed body 14 of a powder is compression molded by compressing a powder supplied into die holes 18 by a lower punch 31 and an upper punch 32. In the compression molding, a first compression and a second compression following the first compression are performed. In the first compression, the compression is performed at a first compression speed, and in the second compression, the compression is performed at a second compression speed that is lower than the first compression speed.