Divided Die Alignment via Perpendicular Surfaces and Micro-Gaps
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for preparing powder molded bodies using divided dies often result in reduced molding accuracy due to relative translation of dies in directions other than the intended translational direction, caused by inclined surfaces, leading to errors in cavity formation and shape accuracy.
Innovation Solution
The configuration of the die involves perpendicular divided surfaces that abut with a gap of 1 to 30 µm, preventing relative translation and ensuring accurate alignment, with an optional gas supply system to remove powder from the gap and improve surface contact, thereby enhancing shape accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If inclined divided surfaces are used to form divided dies, then the dies can be assembled to form a cavity, but relative translation occurs in directions other than the intended translational direction, reducing molding accuracy
Solution Approach 1:
The divided surface is segmented into two functional parts: an inclined divided surface for guiding assembly and a perpendicular divided surface for preventing relative translation. This segmentation allows each part to perform its specific function without interfering with the other, resolving the contradiction between ease of assembly and molding accuracy
Solution Approach 2:
Different regions of the divided surface are given different geometric properties: the inclined surface provides guiding functionality while the perpendicular surface provides constraint functionality. This local differentiation of surface properties allows the single divided surface to simultaneously enable easy assembly and prevent unwanted translation
2Manufacturing precision
If perpendicular divided surfaces abut with a gap of 1 to 30 µm, then relative translation is prevented and alignment accuracy is improved, but powder may enter the gap and affect surface contact
Solution Approach 1:
A gas supply device is introduced to blow gas through the gap between perpendicular divided surfaces before the molding process. This preliminary action removes powder particles from the gap, preventing contamination and ensuring proper surface contact during molding
Solution Approach 2:
Gas flow is used as a pneumatic mechanism to clear powder from the gap between divided surfaces. The gas flow dynamically removes harmful powder particles without requiring mechanical intervention, maintaining the tight gap configuration while preventing contamination
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
There is provided, for example, a method which can improve molding accuracy of a powder molded body and consequently a sintered body by preventing relative translation in the up-down direction between divided dies, which is derived from an inclined divided surface forming a divided surface of each of the divided dies. Each of a plurality of divided dies (11, 12) has a divided surface (111, 121) and a defining surface (112, 122) which defines a cavity 100. The divided surface has an inclined divided surface (1112, 1212) inclined with respect to the translational direction, and at least one pair of perpendicular divided surfaces (1112, 1113, 1211, 1213) which is disposed on the opposite side based on the defining surface and is perpendicular to the translational direction. Each of the plurality of divided dies (11) and (12), while abutting against each other at, at least the at least one pair of perpendicular divided surfaces of the divided surface, abuts against each other in a state of being spaced apart from each other with a gap d within a range of 1 to 30 µm at the inclined divided surface (1112, 1212), thereby forming the cavity 100.