Green Compact Pressing Tool With Continuous Powder Measurement
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Solution Overview
Problem
Existing methods for determining the parameters of powdery materials, such as filling density and flow rate, are not effectively implemented during the series production of green compacts, leading to quality fluctuations and process hysteresis due to reliance on initial data sheet values.
Innovation Solution
A method and pressing tool incorporating a measuring device, such as a Hall-flowmeter, to continuously and automatically measure filling density and flow rate during the production of green compacts, using a filling shoe and a control device to manage the sequence and frequency of measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual measurement of filling density and flow rate is performed using a Hall-flowmeter, then measurement precision is improved, but productivity deteriorates due to time-consuming measurements that cannot be performed during series production
Solution Approach 1:
The measuring device is integrated into the pressing tool structure, combining the measurement function with the pressing function. The measuring device includes a measuring chamber that can be filled with powder material during the pressing process, allowing simultaneous production and measurement without stopping the series production line.
Solution Approach 2:
The measurement process is made continuous by automatically filling the measuring chamber with powder material during the pressing operation. The control device automatically triggers the filling process when the measuring chamber is empty, ensuring continuous measurement without interrupting production flow.
2Device complexity
If initial data sheet values are used for material parameters, then device complexity is reduced, but manufacturing precision deteriorates due to quality fluctuations and process hysteresis
Solution Approach 1:
The control device receives measurement data from the measuring device and automatically adjusts the pressing parameters based on the measured filling density and flow rate. This closed-loop feedback system ensures consistent green compact quality by dynamically adapting to material property variations.
Solution Approach 2:
The system automatically performs measurement and adjustment without external intervention. The control device autonomously manages the filling process, triggers measurements, and adjusts pressing parameters based on real-time material property data.
3Productivity
If measurement intervals are increased to reduce frequency, then productivity is improved, but measurement precision deteriorates due to material property changes during production
Solution Approach 1:
The measuring device is filled with powder material at regular intervals during the pressing process. The control device manages the filling cycles automatically, ensuring measurements are taken at appropriate intervals to capture material property changes while maintaining production throughput.
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
Enables continuous monitoring and adjustment of material parameters, ensuring consistent green compact quality by dynamically adjusting measurement intervals and tool settings, thereby reducing quality fluctuations.
Implementation Method 1
a time can be determined in which a predetermined volume of a powdery material flows out of the funnel via the outlet opening
Implementation Method 2
the mass of the material arranged in the volume can be measured
Data Source
AI summary
At least one parameter of a material is determined with a pressing tool usable for producing a green compact and a pressing tool for producing at least one green compact. The pressing tool has at least one planar surface which is formed at least in part by a die which, starting from the surface, extends along an axial direction and, on the surface, has a cavity which extends from the surface along the axial direction and has an inner circumferential surface; wherein the cavity forms a receptacle for a powdery material which can be pressed in the cavity by at least one punch plunging into the cavity along the axial direction to form the green compact.