Roller Bore Heating With Clamping Contact for Faster Heat Transfer
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Solution Overview
Problem
Existing heating technologies for rollers, such as oil heaters, inductive heaters, and electric heaters, face challenges including long lead times, high costs, and inefficient heat transfer, limiting their ability to rapidly and effectively heat rollers to high temperatures.
Innovation Solution
A heating device with a heating element inserted into a bore of the roller, accompanied by a clamping element that contacts the inner surface of the bore, allowing for conductive heat transfer and eliminating air gaps that impede heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a heating element is inserted into a bore of the roller without a clamping element, then the structure is simpler, but heat transfer efficiency deteriorates due to air gaps
Solution Approach 1:
A clamping element made of thermally conductive material is introduced as an intermediary between the heating element and the roller body. This clamping element eliminates air gaps and provides a direct thermal conduction path, significantly improving heat transfer efficiency while maintaining relatively simple device structure.
2Adaptability or versatility
If traditional electric heating is used with a bore and heating element, then no working medium is required, but heating time increases due to poor heat transfer
Solution Approach 1:
The clamping element serves as a thermal intermediary that bridges the heating element and roller body, eliminating the thermal resistance of air gaps. This reduces heating time significantly while maintaining the flexibility of electric heating without working media.
3Ease of manufacture
If graphite paste is used to lubricate the heating element for installation, then installation is simplified, but heat transfer deteriorates after the paste evaporates
Solution Approach 1:
The clamping element provides a permanent thermal conduction path that does not rely on evaporating lubricants. It maintains excellent heat transfer efficiency throughout the operational life of the device while still allowing for easy installation.
4Device complexity
If oil heaters are used to heat the roller, then the equipment is simpler, but heating time increases and temperature limit is reached
Solution Approach 1:
The clamping element enables direct thermal contact between the heating element and roller body, dramatically improving heat transfer efficiency. This reduces heating time while maintaining equipment simplicity, and allows operation at higher temperatures beyond the limitations of oil-based 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 enables rapid heating of rollers, reduces heating time by approximately 17.5 minutes compared to traditional methods, and improves heat transfer efficiency, allowing rollers to reach higher temperatures effectively.
Implementation Method 1
a clamping element (7) that is arranged on a surface of the heating element (2) and that is configured to contact an inner surface (5) of the bore (4) when the heating device (1) is inserted into the bore (4) of the roller (100) and to transfer heat from the heating element (2) conductively to the roller (100) and/or the roller body (3)
Data Source
AI summary
The invention relates to a heating device for heating a roller, wherein the heating device has a heating element which is configured to be inserted into a bore of the roller and to provide, preferably to provide electrically, heating power and/or heat for heating the roller and/or a roller body of the roller, and wherein the heating device has a clamping set which is arranged on a surface of the heating element and which is configured to contact an inner surface of the bore when the heating device is inserted into the bore of the roller and to transfer heat from the heating element conductively to the roller and/or the roller body. The invention furthermore relates to a roller. The invention furthermore relates to a calender or an embossing cassette.