Segmented Housing Cover for Ball Mill Access
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Solution Overview
Problem
Conventional laboratory-scale ball mills have operational inefficiencies due to their large and cumbersome design, which complicates user access to grinding stations, increases the risk of errors, and requires manual handling of heavy housing covers, leading to safety concerns and space inefficiency.
Innovation Solution
A ball mill with a two-part housing cover that can be easily opened and closed automatically, allowing access to a single grinding station at a time, featuring a sector-cutout design and motor-driven operation to enhance user safety and reduce the need for manual handling, while maintaining a compact form factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large housing with a sweeping swivel lid is used to accommodate the carrier device with cantilevered receiving devices, then the rotating parts can be completely enclosed for safety, but the housing requires a large amount of space and the lid becomes heavy and difficult to handle
Solution Approach 1:
The housing cover is divided into two separate parts: a stationary cover part and a rotating cover part. The rotating cover part can be independently opened and closed to provide access to individual grinding stations, eliminating the need to handle a large heavy sweeping lid. This segmentation reduces the weight and complexity of manual operation while maintaining complete enclosure when closed.
2Ease of operation
If a large sweeping swivel lid is used to provide access to all grinding stations, then the entire carrier device can be accessed, but the housing becomes cumbersome and requires excessive space
Solution Approach 1:
The housing cover is divided into a stationary cover part and a rotating cover part that can be independently opened to provide access to individual grinding stations. This eliminates the need for a large sweeping lid that requires excessive housing space, while still allowing convenient access to grinding stations as needed.
Solution Approach 2:
The rotating cover part can be dynamically opened and closed to provide access to different grinding stations. This dynamic access mechanism allows the housing to maintain a compact form factor while still enabling easy access to all grinding stations when needed, without requiring a large sweeping lid.
3Ease of operation
If receiving devices are arranged completely above the carrier device with cantilevered mounting, then the grinding stations can be accessible, but the vertical extent of moving parts becomes large requiring a voluminous housing
Solution Approach 1:
The receiving devices are mounted on the carrier device in a horizontal arrangement rather than extending vertically upward. This dimensional change allows grinding vessels to be accessible from the side through the rotating cover opening, reducing the vertical extent of moving parts and enabling a more compact housing volume while maintaining ease of access.
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
The solution improves operational reliability, reduces the risk of errors, and provides a more user-friendly and space-efficient design by allowing controlled access to grinding stations, enhancing safety and ease of use while maintaining a compact and elegant form.
Implementation Method 1
Due to the rotation of the grinding bowls, a radially outward-directed centrifugal force is exerted on the material to be ground
Implementation Method 2
the drive of the grinding bowls in a planetary ball mill causes an absolute rotational movement of the grinding bowl around its own axis, the receiving or planetary axis, so that a significantly larger, additional centrifugal force component is generated
Implementation Method 3
Finally, the Coriolis force is also at work
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
The invention relates to a ball mill, in particular a laboratory-scale planetary or centrifugal ball mill, with a housing (1) having a housing cover (18) for closing the grinding space (40) such that the housing cover (18) can be transferred from an open to a closed position and vice versa, wherein the housing cover (18) has at least two cover parts (182, 184) which run one inside the other, wherein the first cover part is a cut-out cover part (182) with a cut-out (183) and the second cover part is a closure cover part (184) for closing the cut-out (183), and the cut-out cover part (182) and the closure cover part (184) are able to move relative to one another between the open and the closed position, wherein, in the open position, the cut-out (103) exposes an access opening (186), through which access is allowed to a grinding station (3) for inserting the grinding vessel (34) into the receiving device (32) or for removing the grinding vessel (34) from the receiving device (32), and wherein, in the closed position, the cut-out (183) is closed by means of the closure cover part (184) so that the grinding operation can be carried out.