Adjustable Ring Holder for Play-Free Dental Blanks
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Solution Overview
Problem
Conventional holding devices for round dental blanks suffer from inaccuracies and spalling due to manufacturing tolerances, leading to play and chipping during the manufacturing process.
Innovation Solution
A holding device featuring an open ring element with a closing element that can be adjusted to accommodate dental blanks of varying diameters, utilizing a tongue and recess system with detent elements and locking geometries, along with an adhesive gap and contact feet for secure fixation and adaptation to different diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional holding devices are used for dental blanks with production tolerances, then the device structure is simple, but play occurs leading to manufacturing inaccuracies
Solution Approach 1:
The holding device incorporates a dynamic closing element that can be adjusted to different positions along the ring element, allowing the device to adapt to varying dental blank diameters within tolerance ranges. This dynamic adjustment capability eliminates play while maintaining manufacturing accuracy without requiring multiple fixed-size holders.
Solution Approach 2:
The invention changes the parameter of the closing element position along the ring element to accommodate different dental blank sizes. By allowing the closing element to be positioned at various locations, the holding device can maintain optimal contact and eliminate play for blanks with different diameters, thereby improving manufacturing precision.
2Reliability
If dental blanks are clamped in conventional holding devices, then the clamping process is simple, but spalling occurs on the circular notch
Solution Approach 1:
The holding device applies localized clamping forces through specifically designed contact surfaces and distribution mechanisms. Instead of uniform clamping, the device concentrates force at optimal locations on the dental blank, preventing spalling at the circular notch while maintaining secure holding. This localized approach improves reliability without significantly increasing overall device complexity.
3Adaptability or versatility
If the ring element is closed at fixed positions, then the device structure is simple, but it cannot accommodate different diameters without play
Solution Approach 1:
The closing element is designed to be movable along the ring element rather than fixed at single positions. This dynamic capability allows the closing element to be positioned at multiple locations, enabling the holding device to accommodate dental blanks with different diameters while eliminating play through proper tensioning at the appropriate position.
Solution Approach 2:
The ring element is divided into multiple segments or positions where the closing element can be located. This segmentation allows the device to adapt to different blank sizes by closing at the appropriate segment, providing versatility without requiring a completely different device for each size.
Data Source
AI summary
A holding device (100) for a round dental blank (200). The holding device has an open ring element (101) for laterally gripping the dental blank (200) and a closing element (103) for closing the ring element (101) at various positions.