Heating device and manufacturing method of can body
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Solution Overview
Problem
Existing heating devices for can bodies are inefficient in temperature control, leading to prolonged heating times and potential resin brittleness due to rapid cooling, which affects the quality and durability of resin-coated cans.
Innovation Solution
A heating device with multiple heating sections and a cooling portion, utilizing electric heaters and a circulation path for hot air, allows for precise temperature control and efficient energy use, minimizing resin strain and ensuring consistent can body temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional heating devices are used for resin-coated can bodies, then heating can be performed, but temperature control is inefficient leading to prolonged heating times and potential resin brittleness
Solution Approach 1:
The heating device is divided into multiple heating sections (first heating section, second heating section, third heating section) with different temperature zones. Each section operates at a different temperature to progressively heat the can body, allowing efficient heating while preventing resin brittleness through controlled temperature gradients.
Solution Approach 2:
Different portions of the can body receive different heating intensities through the multi-section heating system. The first heating section applies higher temperature to the bottom portion, while subsequent sections apply progressively lower temperatures to upper portions, ensuring uniform heating without overheating any single area that would cause resin degradation.
2Loss of time
If rapid cooling is applied after heating, then cooling time is reduced, but resin brittleness occurs affecting can quality
Solution Approach 1:
The cooling process is segmented into multiple cooling sections (first cooling section, second cooling section, third cooling section) similar to the heating sections. Each cooling section provides progressively milder cooling, allowing the resin to cool uniformly without thermal shock that would cause brittleness, while still maintaining efficient production timing.
Solution Approach 2:
The multi-section cooling system provides gradual cooling that cushions the resin from sudden temperature changes. By transitioning through intermediate temperature zones rather than direct rapid cooling, the resin structure is preserved, preventing brittleness while maintaining production efficiency.
3Productivity
If uniform high temperature heating is applied to can bodies, then heating efficiency is improved, but resin strain increases leading to quality issues
Solution Approach 1:
The heating device applies different temperatures to different sections of the can body. The first heating section applies higher temperature to the bottom portion where heat penetration is needed, while subsequent heating sections apply progressively lower temperatures to upper portions, preventing resin strain while maintaining overall heating efficiency.
Solution Approach 2:
The heating system dynamically adjusts temperature distribution through multiple heating sections operating at different temperature levels. This dynamic temperature control allows efficient heat transfer to the can body while preventing localized overheating that would strain the resin coating, adapting the heating profile to the thermal requirements of different can body regions.
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 device enhances energy efficiency, reduces heating time, and prevents resin brittleness by maintaining optimal temperature ranges, improving the quality and durability of resin-coated cans.
Implementation Method 1
a circulation path 60 that circulates hot air generated by a heating unit 40
Implementation Method 2
utilizing electric heaters
Implementation Method 3
heating device with multiple heating sections and a cooling portion, utilizing electric heaters and a circulation path for hot air
Data Source
AI summary
There is provided a heating device heating a can body with hot air, the heating device including a heating unit configured to generate the hot air, a first heating portion configured to heat the can body to raise a temperature of the can body with the hot air, and a second heating portion configured to heat the can body that has been heated to the raised temperature. At least one of the first heating portion or the second heating portion may include a plurality of heating sections having different heating conditions of the can body.