Height-Adjustable Die for Pellet Press Deflection Control
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Solution Overview
Problem
Existing pellet presses face issues with deformation and breakage due to high pressure, leading to inconsistent pellet quality and reduced service life, especially when processing materials with coarse structures or high humidity, and existing solutions are costly and complex.
Innovation Solution
A height-adjustable die supported by an outer and inner support ring with spindles offset by 120°, allowing precise adjustment of the distance between the roller shell and the die, combined with a forced drive mechanism and temperature control, to optimize pellet production and extend equipment life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the die is supported only on the outer edge, then the structure is simple, but die deflection occurs under high pressure leading to inconsistent pellet quality
Solution Approach 1:
The support structure is segmented into multiple independent support points (at least two supports distributed around the inner circumference of the die), replacing the single outer-edge support with a distributed support system that reduces deflection while maintaining structural simplicity
Solution Approach 2:
The support arrangement transitions from a single-point radial support to a multi-point distributed support system around the die's inner circumference, adding spatial distribution in the azimuthal dimension to reduce deflection under load
2Manufacturing precision
If the die is made more rigid to prevent deflection, then pellet quality improves, but the risk of breakage under high pressure increases
Solution Approach 1:
Additional support points are positioned to provide counterbalancing forces that offset the high pressing loads, reducing the net stress on the die walls and preventing both excessive deflection and catastrophic failure
Solution Approach 2:
The distributed support system is pre-configured to bear the anticipated high pressing loads before they occur, cushioning the die against deflection and breakage during operation
3Device complexity
If the gap between roller and die is fixed, then the structure is simple, but it cannot adapt to materials with varying structures and humidity levels
Solution Approach 1:
The gap between the roller and die is made adjustable through a height adjustment device that allows the die height to be varied, enabling adaptation to different material properties while maintaining a relatively simple mechanical adjustment mechanism
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
The solution ensures consistent pellet quality, extends the service life of the pellet press, and reduces the risk of deformation and breakage, while allowing for efficient processing of materials with varying structures and humidity levels.
Implementation Method 1
A height adjustment device, in each case with a spindle, supports the die
Implementation Method 2
the roller exerts high pressure on the die and the material on it, which can lead to deformation
Data Source
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AI summary
Pellet presses are widely known in practice, but problems often arise, particularly with the die, which can shorten the service life of the presses and, in particular, impair the quality of the pellets produced. The object of the invention is, among other things, to propose a robust pellet press for improved pellet production.In a pellet press (1) with a non-rotatable die (30) designed as an annular disk, which has press channels (32) extending from a rolling surface (31) through the die (30) to an exit surface (33), and with at least one roller (20) mounted to be rotatable about a central axis (22), wherein the roller (20) rolls in a circle around an upright central axis (2) on the rolling surface (31) of the die (30) over a roller shell (21) forming the circumference of the roller (20), the invention proposes that the die (30) is height-adjustable such that a defined distance between the roller shell (21) and the rolling surface (31) can be set. The proposed pellet press is designed to compact various materials, such as organic materials like plastics, wood, or the like, and press them into pellet form.