Powder Weighing Device with Segmented Zones and Pestle
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Solution Overview
Problem
Existing automatic weighing devices for powder samples lack high precision and are not well-suited for switching between different types of powdered samples, leading to contamination and low precision weighing due to agglomeration issues.
Innovation Solution
A high-precision automatic weighing device featuring a three-dimensional moving track with interconnected slideways, a mechanical claw for sample handling, a fine-tuning sample releasing mechanism, and a sample loosening pestle to address agglomeration, ensuring precise and contamination-free weighing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automatic weighing is used for different powdered samples, then weighing efficiency is improved, but weighing precision deteriorates due to sample agglomeration and contamination
Solution Approach 1:
The device divides the weighing process into distinct functional zones along the horizontal length track: a cleaning area for sample tube preparation, a sample storage area for organized sample placement, and a weighing area for precise measurement. This segmentation allows each zone to optimize its specific function, preventing cross-contamination and agglomeration while maintaining high automation.
Solution Approach 2:
A partition plate is introduced as an intermediary barrier between the cleaning area and the sample storage area. This partition prevents contamination from spreading between zones during the automated weighing process, thereby maintaining sample integrity and weighing precision while preserving automation efficiency.
2Productivity
If frequent weighing operations are performed, then productivity is improved, but sample contamination increases requiring frequent cleaning
Solution Approach 1:
The cleaning area enables preliminary cleaning of sample tubes before they are transferred to the weighing area. By performing cleaning operations in advance in a dedicated zone, the system prevents contamination from affecting subsequent samples, allowing frequent weighing operations without compromising sample integrity.
Solution Approach 2:
The cleaning function is extracted as a separate, dedicated area distinct from the weighing area. This extraction allows cleaning operations to occur independently without interfering with the weighing process, enabling high throughput while maintaining strict contamination control through spatial separation.
3Object-affected harmful factors
If sample tubes are tightly sealed to prevent contamination, then sample purity is improved, but sample release precision deteriorates due to agglomeration
Solution Approach 1:
The sample release mechanism employs periodic tapping actions at controlled intervals during the weighing process. This periodic disturbance prevents powder agglomeration inside the sealed sample tube, ensuring consistent sample flow and precise release measurements while maintaining sample tube sealing to prevent contamination.
Data Source
AI summary
The present disclosure relates to a high-precision automatic weighing device for powder samples, including a three-dimensional moving track and a working area, wherein the three-dimensional moving track includes a horizontal length track, a vertical track and a horizontal width track, the vertical track being slidingly connected to the horizontal length track, the horizontal width track being slidingly connected to the vertical track; the horizontal length track is arranged on one side of the working area, and a cleaning area, a sample storage area and a weighing area are provided in sequence along the horizontal length track within the working area; a series of slideways are connected to a mechanical claw for grabbing a sample tube in the sample storage area, a fine-tuning sample releasing mechanism to release samples in trace amounts, a sample head clamping part for mounting or dismounting of a sample head, and a sample loosening pestle.