Multi-Component Injection Molded Control Knob
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Solution Overview
Problem
The existing manufacturing process for turntable adjusting knobs requires significant effort and assembly time due to separate production and snap-in connection of components, leading to logistical challenges and potential unclean separation issues.
Innovation Solution
Producing the adjusting knob as multi-component injection molded parts where the first component is surface-coated and the second is not, with a slot between them to prevent coating overgrowth, allowing for a single injection mold and reduced assembly needs, using materials like ABS, TPE, and a galvanized metal or paint coating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate components are produced and assembled by snap-in connection, then manufacturing flexibility is improved, but assembly effort and manufacturing complexity increase
Solution Approach 1:
The patent merges two separately produced components into a single multi-component injection molded part. The first component (with surface coating) and second component (without surface coating) are co-molded in one manufacturing process, eliminating the need for separate production and assembly operations while maintaining the functional benefits of having distinct components with different properties.
2Adaptability or versatility
If multiple components are produced separately, then component specialization is improved, but logistics and storage requirements increase
Solution Approach 1:
The patent combines multiple specialized components into a single integrated part produced by multi-component injection molding. This eliminates the need for separate storage, handling, and logistics management of individual components while preserving their specialized functions through distinct material selections and design features within the single part.
3Manufacturing precision
If surface coating extends to the edge of the first component, then coating coverage is improved, but unclean separation and coating overgrowth occur
Solution Approach 1:
The patent extracts or removes the problematic edge area where coating overgrowth occurs by designing a slot that separates the first and second components. This slot prevents the surface coating from extending onto the second component, thereby eliminating the harmful effect of coating overgrowth while maintaining adequate coating coverage on the first component's functional surfaces.
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 approach simplifies manufacturing and assembly, eliminates logistics, ensures clean coating separation, and provides a durable and operable knob with reduced visual and tactile impact of the slot, ensuring efficient production and safe operation.
Implementation Method 1
Producing the adjusting knob as multi-component injection molded parts
Implementation Method 2
the first component is surface-coated and the second component is not surface-coated
Implementation Method 3
The surface coating can be a galvanized metal coating and in particular consist of chromium
Data Source
Figure 1
Figure 2
Figure 3A~5B
AI summary
The element has a cylindrical ornamental ring (1) and an annular actuating part (4) formed as multi-component injection-molded parts and connected with each other. The ring and the part have surfaces, which are adjacent to each other and lie one after another in a plane. A surface coating (10) of the ring extends until a boundary of the ring, where the boundary is adjacent to the actuating part. A slot (8) with a breadth less than 1 millimeter is formed between the surfaces. The surface coating is provided as a galvanized chromium coating.