Spice Mill Ceramic Grinding Element Clamping to Prevent Breakage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional spice grinders face issues with ceramic grinding elements breaking or splintering due to manufacturing tolerances and compressive forces, leading to potential contamination of food and equipment failure.
Innovation Solution
A spice grinder part design where the grinding element is clamped in a non-positive manner with a compressive force acting radially inward, ensuring full-surface contact and reducing the risk of hairline cracks, using a receiving element with a smaller inner diameter than the grinding element's outer diameter to distribute pressure evenly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inner diameter of the receiving element is designed larger to accommodate manufacturing tolerances of ceramic grinding elements, then the grinding element can be reliably inserted into the receiving element, but the grinding element is mounted in a floating manner which leads to hairline cracks, breakage, or splintering during operation
Solution Approach 1:
The patent changes the dimensional parameters by making the receiving element's inner diameter smaller than the grinding element's outer diameter, creating an interference fit that generates compressive forces to secure the grinding element without floating mounting
Solution Approach 2:
The patent applies different local qualities by creating distinct contact zones: a first contact zone at the bottom for radial compressive forces and a second contact zone at the top for axial compressive forces, ensuring stable positioning and preventing floating mounting
2Strength
If the grinding element is secured with a tight fit to prevent floating mounting, then structural integrity is improved, but manufacturing precision requirements increase making insertion difficult
Solution Approach 1:
The patent deliberately uses parameter changes by designing the receiving element with a smaller inner diameter than the grinding element's outer diameter, creating an interference fit that provides both secure mounting and facilitates insertion through controlled compressive forces
3Reliability
If the receiving element has a smaller inner diameter than the grinding element's outer diameter, then the grinding element is clamped securely preventing hairline cracks and splintering, but the insertion process becomes more difficult
Solution Approach 1:
The patent applies local quality by creating specific contact zones with different functions: the first contact zone at the bottom provides radial support and the second contact zone at the top provides axial positioning, enabling secure clamping while maintaining ease of insertion through localized force application
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 significantly reduces the risk of breakage or chipping of the grinding element, preventing defects and ensuring safe operation by distributing compressive forces over a larger area and preventing unintentional displacement.
Implementation Method 1
The frictional connection between the refining element and the receiving element can be generated in particular by the (desired) inner circumference of the receiving element being smaller than the (desired) outer circumference of the refining element during its manufacture
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a spice mill part (14), more particularly a spice mill lower part (15), for a spice mill, having a housing (16), which consists at least in part of a plastic material and which can be rotatably connected to a further spice mill part (33), more particularly a spice mill upper part (34). A receiving element (13) is provided on the housing (16), in which receiving element there is arranged a milling element (1), more particularly a milling ring (2), made from a ceramic material, with the milling element (1) being clamped in the receiving element (13) in a frictionally engaged manner by means of a compressive force directed substantially radially inwardly and acting on a self-contained outer bearing face (6) of the milling element (1), the compressive force acting substantially along the entire circumference on the external bearing face (6) of the milling element (1).