Feeding Screw Machine With Monotonic Free Volume Compression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing feeding screw machines struggle to efficiently handle materials with low bulk density, such as recycled materials, as they require high throughput and economical processing, which is not effectively achieved due to limitations in material compression and filling efficiency.
Innovation Solution
A feeding screw machine design featuring a housing with monotonically decreasing free volume, conical screw shafts, and a degassing system that ensures continuous compression and high filling efficiency by adjusting the cross-sectional area and pitch of the screw shafts, allowing for efficient handling of materials with low bulk density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional feeding screw machines are used, then the structure is simple, but the material compression and filling efficiency is insufficient for low bulk density materials
Solution Approach 1:
The screw shafts are designed with conical geometry where the diameter varies along the conveying direction, creating a dynamically changing free volume that adapts to the material compression requirements. This dynamic geometry enables continuous compression of low bulk density materials while maintaining structural integrity
Solution Approach 2:
The free volume parameters (cross-sectional area A(x) and pitch H(x)) are systematically varied along the conveying direction to achieve monotonic volume decrease. This parameter change strategy transforms the screw machine from a simple conveyor to an efficient compression device for low density materials
2Manufacturing precision
If the free volume decreases monotonically to compress material, then the filling efficiency improves, but the design complexity increases
Solution Approach 1:
The free volume V(x) is controlled through systematic variation of geometric parameters A(x) and H(x) along the conveying direction. This ensures monotonic volume decrease and consistent material compression, achieving high filling degree while maintaining manufacturable design
Solution Approach 2:
The conical shape of the screw shafts introduces curvature to the otherwise linear geometry, enabling smooth and continuous free volume reduction. This curved geometry ensures monotonic compression without abrupt changes, improving manufacturing precision
3Productivity
If high throughput is achieved for low bulk density material, then the economic efficiency improves, but the compression reliability may decrease
Solution Approach 1:
The monotonic decrease of free volume along the entire conveying direction ensures continuous compression action throughout the material transport process. This continuous compression maintains reliability even at high throughput speeds by preventing material expansion or density fluctuations
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 enables high throughput and economical operation of processing screw machines by ensuring continuous and reliable compression of materials with low bulk density, improving filling efficiency and conveying efficiency.
Implementation Method 1
at least two screw shafts rotatably arranged in the at least two housing bores for conveying the material in a conveying direction from the supply opening to the feeding opening
Implementation Method 2
for continuous compression of the material, the free volume V(x) decreases monotonically in the conveying direction at least in some regions
Data Source
AI summary
A feeding screw machine for feeding a processing screw machine comprises a housing with at least two housing bores formed therein and screw shafts rotatably arranged in the at least two housing bores. The at least two housing bores and the at least two screw shafts define a free volume in a respective cross-sectional plane, which decreases monotonically at least in some regions for continuous compression of a material in a conveying direction. This enables an improved supply of material with a low bulk density.