Resin-Coated Can Trimming With Pre-Cooling for Uniform Edges
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Solution Overview
Problem
The softening of resin coating due to elevated temperature during can drawing and/or drawing-and-ironing results in uneven edges when trimmed, particularly for PET resin-coated cans.
Innovation Solution
A device and method involving a press machine, trimmer, and cooling device to cool resin-coated cans via a chute, ensuring uniform trimming by maintaining the resin coating below its glass transition temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resin-coated cans are trimmed immediately after drawing and/or drawing-and-ironing, then productivity is improved, but the resin coating becomes soft and uneven edges occur
Solution Approach 1:
The cooling device is activated before the trimming operation to lower the resin coating temperature below its glass transition temperature. This preliminary cooling action prevents the resin from softening during subsequent trimming, enabling both high productivity and precise cutting without compromising edge uniformity.
2Ease of operation
If the resin coating temperature is maintained high during trimming, then ease of operation is improved, but the resin coating softens and extends causing uneven edges
Solution Approach 1:
The invention changes the temperature parameter of the resin coating from above glass transition temperature to below it, fundamentally altering the resin's physical state from soft and extensible to rigid and stable. This parameter change enables precise trimming while maintaining operational feasibility.
3Manufacturing precision
If cooling is applied to resin-coated cans before trimming, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
A cooling device is introduced as an intermediary component between the press machine and trimmer. This mediator temporarily lowers the resin coating temperature to prevent softening during trimming, achieving precise cuts without requiring complex modifications to the existing press or trimmer mechanisms.
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
Uniform cutting of resin coating is achieved, reducing the number of defective cans by controlling the temperature of the resin-coated cans before trimming.
Implementation Method 1
a cooling device configured to cool at least, of resin-coated cans passing through the chute, portions to be trimmed by the trimmer
Data Source
AI summary
A device and a method for producing resin-coated cans that make it possible to uniformly cut resin coating when resin-coated cans are trimmed after being pressed. A device for producing resin-coated cans includes a press machine, a trimmer, a chute connecting the trimmer to the press machine, and a cooling device configured to cool at least, of resin-coated cans passing through the chute, portions to be trimmed by the trimmer. A method for producing resin-coated cans, in which the resin-coated cans are conveyed to a trimmer by a chute after being processed by a press machine, includes cooling at least, of the resin-coated cans passing through the chute, portions to be trimmed by the trimmer.