Cool Air Channel in Comminuting Device for Heat-Sensitive Materials
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Solution Overview
Problem
Conventional comminuting devices face challenges when processing heat-sensitive materials, particularly plastics with low melting points, as they tend to soften and adhere to machine parts, leading to inefficient operation and poor product quality due to heat generation during the comminuting process.
Innovation Solution
The introduction of additional cool air into the comminuting device, combined with radial ribs and air-conducting elements, enhances heat removal by increasing air volume and optimizing heat transfer, allowing for improved machine efficiency and cost-effectiveness without additional thermal stress on materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If additional cool air is introduced into the comminuting device to increase heat removal, then machine efficiency and productivity are improved, but device complexity increases due to additional cooling system components
Solution Approach 1:
The patent combines the cooling function with the existing housing structure by forming the cool air channel between the housing and the rotating disk, merging two functions (housing support and cooling) into a single integrated structure, thereby improving cooling efficiency without proportionally increasing device complexity
Solution Approach 2:
The housing serves multiple functions: it provides structural support, encloses the comminuting chamber, and simultaneously forms the cool air channel when combined with the rotating disk, demonstrating multi-functionality that improves cooling without adding dedicated cooling components
2Object-affected harmful factors
If machine output is lowered to reduce heat generation during comminuting, then material thermal stress is reduced, but productivity and economic operation are compromised
Solution Approach 1:
The patent converts the harmful heat generated during comminuting into a manageable parameter by introducing cool air that absorbs the heat, transforming the harmful thermal energy into a controllable cooling process, allowing high machine output without excessive material thermal stress
Solution Approach 2:
Cool air acts as an intermediary medium between the heat source (comminuting tools and material) and the environment, absorbing excess heat through convection and carrying it away, thereby protecting the material from thermal stress while maintaining high productivity
3Device complexity
If self-ventilation air flow is used for cooling, then device complexity is minimized, but heat removal capacity is insufficient for heat-sensitive materials
Solution Approach 1:
The patent introduces dynamic elements to the cooling system by using the rotating disk to actively circulate cool air through the channel, creating a dynamic cooling flow that enhances heat removal capacity without significantly increasing device complexity compared to static cooling systems
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 solution effectively reduces heat exposure for both tools and materials, enabling higher operational performance and cost-effectiveness by utilizing air as a neutral and freely available cooling medium, ensuring efficient heat removal and maintaining product quality.
Implementation Method 1
Cool air is fed in a radial plane between a housing and a rotating disk for cooling the comminuting tools and the material
Implementation Method 2
the cool air stream brushes along radial ribs and is thereby supported in its flow direction
Implementation Method 3
In a preferred embodiment, radial ribs are provided in the cool air conduit, which are mounted to the disk that is located at the intake side. The cool air stream brushes along the radial ribs and is thereby supported in its flow direction
Implementation Method 4
A characteristic of conventional devices during operation is air flow, which, apart from the centrifugal force, is the force that moves the materials
Data Source
AI summary
An apparatus for comminuting material is provided. The apparatus includes two disks, which are arranged coaxially to one another inside a housing that encloses a comminuting room. The rim areas of the disks are positioned opposite one another, thus forming a milling gap, and are provided with interacting comminuting tools. To generate a mutual relative movement of the disks, at least one of the disks carries out a rotational motion around the mutual axis. To comminute the material, it is first fed into the comminuting room and subsequently radially channeled to the milling gap. For additional cooling, the disk on the intake side is arranged at an axial distance to the intake side of the housing front wall, thus forming a ringwheel-shaped cool air conduit. This can be charged with cool air, which flows through the conduit in a radial direction. In this way, the machine capacity can be increased without causing thermal damage to the material to be processed.