Calcium Phosphate Particle Production Using Needlelike Projections
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Solution Overview
Problem
Conventional methods for producing calcium phosphate-based particles using pulverizing machines like jaw crushers result in reduced yield, as particles smaller than the minimum allowable size are not usable and those larger than the maximum size are re-pulverized, leading to inefficiencies in particle size control and production yield.
Innovation Solution
A method and apparatus involving compressive pulverization using needlelike projections protruding parallel to each other, which allows for the production of calcium phosphate-based particles within a specific size range at a high yield by adjusting the size and arrangement of the projections, and the orientation of void holes in the molded body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional pulverizing machines like jaw crushers are used to produce calcium phosphate-based particles, then the particles can be pulverized, but the yield is reduced because particles smaller than the minimum allowable size are unusable and particles larger than the maximum size require re-pulverization
Solution Approach 1:
The invention divides the pulverization process into multiple stages using a multi-stage pulverizing machine with different types of pulverizing elements (toothed rollers for coarse pulverization, smooth rollers for fine pulverization) at each stage, enabling progressive size reduction to achieve uniform particle sizes within the target range and minimize waste
Solution Approach 2:
The invention changes the parameters of the pulverizing machine by using multiple stages with different pulverizing element configurations (toothed vs. smooth rollers, different gap settings) to optimize the pulverization process for achieving uniform particle size distribution and maximizing yield
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 approach enables the production of calcium phosphate-based particles with desired particle sizes and shapes at a higher yield compared to conventional methods, improving the efficiency of particle size control and reducing waste, as the needlelike projections apply uniform load for equidistant fractures, resulting in uniform particle sizes.
Implementation Method 1
the molded body containing a calcium phosphate-based material as a principal component is compressively pulverized by a plurality of needlelike projections protruding parallel to each other
Implementation Method 2
the needlelike projections apply uniform load for equidistant fractures, resulting in uniform particle sizes
Data Source
AI summary
A method for making calcium phosphate particles, the method including compressively pulverizing a molded body containing, as a principal component, a calcium phosphate material with a plurality of parallel extending needlelike projections. The molded body contains a plurality of void holes oriented in one direction and the pulverizing is carried out by moving the needlelike projections in a direction of protrusion, which is aligned with the one direction. Each needlelike projection has a diameter within a range of 1.0 to 2.0 mm and a number the needlelike projections per unitary surface area is within a range of 5 to 35 per cm2.