Dispensing Device Screw Guide Integration
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Solution Overview
Problem
Generic dispensing devices for flowable products have limited conveying capacity due to the mechanical stability requirements of both the screw tube and forming tube, which restrict the maximal open cross section and thus the conveying capacity.
Innovation Solution
The dispensing device integrates the screw guide into the forming tube, eliminating the need for a separate screw tube and providing only the necessary mechanical stability to the forming tube, allowing for a maximally available conveying cross section limited by the minimal wall thickness of the forming tube.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate screw tube is used to guide the screw conveyor, then the mechanical stability of the screw conveyor is ensured, but the conveying capacity is significantly limited due to the constricted open cross section
Solution Approach 1:
The patent merges the screw guide function into the forming tube by creating a cylindrical recess directly in the forming tube body. This eliminates the need for a separate screw tube, allowing the screw conveyor to extend directly into the forming tube while maintaining guidance. The merging of functions increases the open cross section and thus the conveying capacity while ensuring mechanical stability through the integrated design.
2Productivity
If the wall thickness of the forming tube and screw tube is decreased to increase the open cross section, then the conveying capacity is improved, but the mechanical stability of the tubes becomes insufficient
Solution Approach 1:
By integrating the screw guide function into the forming tube, the patent eliminates the need for a separate screw tube with its own wall thickness requirements. The forming tube alone provides both the structural stability needed and the guidance for the screw conveyor, allowing for a larger open cross section while maintaining sufficient mechanical strength through optimized wall thickness of the single tube structure.
Data Source
AI summary
A dispensing device for a flowable, in particular powdery product, includes at least one screw conveyor discharging the product, a drive for rotating the screw conveyor about its longitudinal axis, and a forming tube for guiding a tubular film. The screw conveyor protrudes with its longitudinal axis into the forming tube, wherein at least one screw guide, in which the screw conveyor is guided transversally to its longitudinal axis, is formed by the inner wall of at least one cylindrical recess in the forming tube.