Rotor Disk Conveying Ribs Prevent Polymer Wedging
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Solution Overview
Problem
In large-scale polymer processing systems, polymer particles and dust tend to accumulate in the critical area between the disc and the container bottom, leading to uncontrolled melting, agglomeration, and equipment jamming due to insufficient conveying capacity of conventional disc designs.
Innovation Solution
The disc features conveying ribs with a slanting flank surface and a triangular cross-section, which prevents particles from becoming wedged and facilitates their easy removal, combined with a thickness reduction and increasing rib height towards the outer edge, ensuring effective particle transport and preventing overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional straight radial ribs are used on the disc, then the structure is simple and easy to manufacture, but the conveying capacity is insufficient for large containers with high filling volumes
Solution Approach 1:
The patent changes the geometric parameters of the conveying ribs by introducing a slanting flank surface with a specific angle (10°-35°) and a triangular cross-section, transforming the conventional straight radial rib design into a more effective configuration that enhances conveying capacity while maintaining manufacturability
Solution Approach 2:
The patent applies curvature by designing the flank surface of the conveying ribs with a slanting angle rather than a straight vertical configuration. This curved/slanted surface geometry improves the mechanical pushing action on polymer particles, enabling effective conveying in large containers while retaining ease of manufacture through simple angular geometry
2Productivity
If the speed of mixing tools is increased to increase dwell time, then the mixing effectiveness improves, but the friction generates more heat leading to local melting of flakes
Solution Approach 1:
The patent extracts polymer particles that have accumulated in the critical area between the disc and container bottom by using conveying ribs with slanting flank surfaces to actively push them outward. This removes the source of excessive friction and heat generation from stationary particles, allowing the system to maintain higher mixing speeds without local melting
Solution Approach 2:
The patent converts the potentially harmful accumulation of particles (which causes friction and heat) into a beneficial conveying mechanism. The slanting flank surfaces of the ribs utilize the natural friction between particles and rib surfaces to push particles outward, transforming the harmful frictional heating into a useful conveying action that prevents particle accumulation
3Quantity of substance
If large discs with large diameters are used for large containers, then the filling volume capacity increases, but the manufacturing precision and rotational smoothness requirements become very high
Solution Approach 1:
The patent applies local quality by introducing varying rib heights across the disc surface, with taller ribs at the outer periphery and shorter ribs toward the center. This localized differentiation optimizes particle conveying in different radial zones of large discs, enabling effective operation of large-diameter discs without requiring excessively high manufacturing precision across the entire disc surface
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 design effectively prevents particle accumulation in the critical area, ensuring homogeneous processing, reducing downtime, and maintaining the quality of the polymer material by preventing local overheating and melting.
Implementation Method 1
the treated plastic material is thrown against the side wall of the container by the centrifugal force of the revolving tool carriers or tools... heated it at the same time... sufficiently heated by the occurring frictional forces
Implementation Method 2
The treated plastic material is thrown against the side wall of the container by the centrifugal force of the revolving tool carriers or tools
Implementation Method 3
the tools grasp and, if necessary, crush the plastic material in the container while heating it at the same time... sufficiently heated by the occurring frictional forces
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to a rotor disk (1) for inserting into a receiving container (2) for treating polymers, comprising a disk body (3), on the upper face (4) of which mixing and/or comminuting tools (5) can be provided and on the opposite lower face (6) of which a number of conveying ribs (7) extending from the inside out is provided, by means of which conveying ribs polymer particles can be conveyed outward during operation or which conveying ribs exert a force directed outward from the center (8) of the rotor disk (1) on the polymer particles caught by the conveying ribs (7) during operation. According to the invention, the conveying ribs (7) have a conveying surface (11), which is straight in the running or rotational direction and that is oriented substantially perpendicularly to the lower face (6), and a flank surface (12) that falls at a slope in a direction opposite the running direction, or have a substantially triangular cross-section.