Comminution Device Plastic Tub Wear Plate Moisture
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Solution Overview
Problem
Existing devices are unsuitable for comminuting materials with high moisture content and metallic components, posing safety hazards and wear issues, especially when shredding expired food products with packaging.
Innovation Solution
A device with a housing containing a rotating impact element, featuring a plastic tray and wear plate to protect the steel structure from corrosion and prevent galvanic reactions, with self-cleaning features to manage moisture and liquids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If material is comminuted in a conventional comminution device, then particle size is reduced, but contamination with foreign materials occurs and energy consumption increases
Solution Approach 1:
The device divides the comminution process into separate functional zones: a pre-comminution chamber for initial size reduction and a main comminution chamber for final particle size control. This segmentation prevents cross-contamination between different material streams and allows each zone to be optimized for its specific function, reducing overall contamination while maintaining energy efficiency
Solution Approach 2:
A magnetically separable intermediate chamber is introduced between the feeding device and the main comminution chamber. This intermediary zone allows for magnetic separation of ferrous contaminants before they enter the main comminution process, preventing contamination of the final product without requiring the entire system to be redesigned
2Manufacturing precision
If material is comminuted in a conventional comminution device, then particle size is reduced, but energy consumption increases
Solution Approach 1:
A pre-comminution device is positioned upstream of the main comminution chamber to perform preliminary size reduction of feed material. By reducing particle size before the material enters the high-energy main comminution zone, the energy required for final size control is significantly reduced, optimizing overall energy consumption while maintaining precise particle size distribution
Solution Approach 2:
The device employs periodic impact and attrition cycles within the comminution chamber, alternating between high-impact crushing phases and lower-energy grinding phases. This periodic action pattern optimizes energy utilization by applying high energy only when necessary for size reduction, rather than continuous high-energy input
3Productivity
If material is comminuted in a conventional comminution device, then throughput is increased, but wear of chamber and rotor increases
Solution Approach 1:
The device utilizes changeable screens with varying aperture sizes and patterns that can be swapped depending on the material being processed and desired output specifications. This allows optimization of the comminution parameters for each material type, reducing unnecessary wear from overly aggressive comminution settings while maintaining high throughput for the specific application
Solution Approach 2:
The rotor speed and feed rate are dynamically adjusted based on material properties and chamber loading conditions. This dynamic control prevents excessive wear by reducing speed when the chamber is heavily loaded or when processing abrasive materials, while maintaining high throughput during optimal operating conditions
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
Ensures safe and efficient comminution of materials with high moisture and metallic content, preventing wear and galvanic reactions while facilitating easy cleaning and maintenance.
Implementation Method 1
a rotor (20) which can be rotated about a rotation axis (x-x) and which has impact elements (22) arranged on the peripheral side
Implementation Method 2
at least one impact element (22) is formed in the form of a spheroidally curved bar
Implementation Method 3
a screen (30) which has a screen surface (301) with a large number of opening portions (302)
Implementation Method 4
a discharge device (40) for discharging comminuted particles which have passed through the screen opening portions (302)
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a device for the comminution of materials preferably containing moisture, comprising a housing (1) for forming an impact chamber (11) having a rotating striking means (13) driven therein by means of a vertically oriented shaft (12), wherein a bottom plate (2), a cover (10), a wall (3) connecting the bottom plate and the cover, and an inlet and an outlet opening (15 and 16) are arranged as the housing (1) of the impact chamber (11). The aim of the invention is to increase the wear resistance of the device, to realize self-cleaning effects, and to enable simple and safe cleaning, in particular at a standstill. According to the invention, in the impact chamber (11) at least along the bottom plate (2), a tub (4) consisting of at least one layer of plastic is arranged and, on the other side of the layer of plastic, a wear plate (5) is arranged.