Segmented Upper Press Die Structure for Low-Weight Rigidity
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Solution Overview
Problem
Solid upper dies in press molding machines are heavy, making high-rate molding difficult and impairing productivity due to the burden on the up-and-down movement mechanism.
Innovation Solution
A pressing die with a frame portion, processing surface portion, and ribs that form segments with spaces, providing sufficient rigidity while reducing weight by distributing loads and using honeycomb shapes to enhance volume ratio and resist bending loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a solid block upper die is used to ensure high rigidity, then press-workability is improved, but the weight increases causing burden on the movement mechanism and reducing productivity
Solution Approach 1:
The upper die is divided into multiple segments separated by ribs, creating a segmented structure with spaces between segments. This segmentation reduces the overall weight while the ribs provide structural support to maintain necessary rigidity for press-workability.
Solution Approach 2:
The upper die incorporates a honeycomb-shaped porous structure within its body. This honeycomb structure reduces weight by creating internal spaces while maintaining structural integrity and rigidity through the geometric configuration of the honeycomb cells.
2Productivity
If weight is reduced by using a non-solid structure, then productivity is improved, but rigidity may be compromised
Solution Approach 1:
The segmented structure with ribs creates multiple load-bearing pathways distributed throughout the die body. This allows the die to maintain rigidity under pressing loads while the spaces between segments reduce weight, enabling faster cycling and improved productivity.
Solution Approach 2:
The upper die combines different structural elements (solid ribs, hollow spaces, honeycomb structure) to create a composite structure that optimizes the strength-to-weight ratio, providing sufficient rigidity for high-rate molding operations.
Data Source
AI summary
An upper die having a reduced weight and sufficient rigidity. In a die which is used for a pressing machine including a lower die provided on a lower side in a height direction, an upper die provided on an upper side in the height direction, and a pressing mechanism that moves the upper die up and down, the die has a plurality of segments in which a concave portion partitioned by ribs is formed, on a rear surface side that is a side opposite to a processing surface.