Multi-Ram Hot-Press Punches for Uniform Force Distribution
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Solution Overview
Problem
Existing hot-press devices face challenges in maintaining uniformity of pressing force distribution when the dimensions of the pressing surfaces of the upper and lower punches increase, particularly around the edges and centers of the punches.
Innovation Solution
The hot-press device incorporates a configuration where the upper and lower punches have rectangular or circular pressing surfaces with individual press rams disposed at the vertices and center of the rear surfaces, and a heating furnace with insulating containers featuring openings for the rams, ensuring uniform force distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the pressing surface dimension of the punch is increased to process larger samples, then the processing capacity is improved, but the uniformity of pressing force distribution deteriorates
Solution Approach 1:
The single hydraulic cylinder is segmented into multiple individual press rams (at least three) that are distributed across the pressing surface. Each press ram independently applies force to a specific region, allowing for uniform force distribution across large pressing surfaces. The press rams are positioned at vertices and center of the rectangular pressing surface to ensure even force distribution.
Solution Approach 2:
Different regions of the pressing surface are provided with locally optimized force application points. The press rams are strategically positioned at vertices and center based on the specific pressing surface geometry (rectangular or circular), ensuring that each local region receives appropriate force to maintain overall uniformity across the entire large pressing surface.
2Manufacturing precision
If multiple individual press rams are added to maintain uniform pressing force, then the pressing force uniformity is improved, but the device complexity increases
Solution Approach 1:
Multiple individual press rams are merged into a single integrated pressing system that operates under unified control. The press rams work together as a coordinated unit to apply distributed force, achieving uniform pressing without requiring separate complex control systems for each ram. The system combines the simplicity of hydraulic control with the benefits of distributed force application.
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 configuration maintains uniform pressing force distribution even with larger pressing surfaces, enhancing stability and reducing heat loss through the insulating container openings.
Implementation Method 1
a heating element, the heating element being provided around the pair of punches
Implementation Method 2
heating the sample
Implementation Method 3
a heat insulating container, heat insulating container accommodating the pair of punches
Implementation Method 4
a lower hydraulic cylinder, the lower hydraulic cylinder being fixed to the lower frame; an upper hydraulic cylinder, the upper hydraulic cylinder being fixed to the upper frame
Data Source
Figure 1
Figure 2A~2C
Figure 3A~3B
AI summary
A hot-press device (A) of the present disclosure includes a heating furnace (2), a pair of punches which includes an upper punch (6) and a lower punch (4) provided in the heating furnace and vertically facing each other, a lower press ram (5) which is connected to a lower surface of the lower punch, an upper press ram (7) which is connected to an upper surface of the upper punch, and a pressing device (3) which is connected to any one or both of the lower press ram and the upper press ram and presses the punch so that the pair of punches are close to each other, in which the lower press ram and/or the upper press ram includes a plurality of individual press rams (5, 7a) which are disposed at intervals, each individual press ram having one end coupled to the pair of punches.