Stamping Device Counter-Pressure Mechanism for Label Accuracy
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Solution Overview
Problem
Existing methods for punching sheet-like material to produce shaped labels often result in inaccuracies and increased production costs due to buckling and the need for separate machines or cumbersome retooling for counter-pressure processes.
Innovation Solution
A punching device with a counter-pressure element that can be moved out of the punching conveyor path, allowing previously punched stacks to act as counter-pressure pistons, increasing throughput and enabling both conventional and counter-pressure processes without retooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a press ram is used to press the stack through the punching blade in a pressing position, then manufacturing precision is improved, but productivity deteriorates
Solution Approach 1:
Instead of using a press ram to push the blank stack in the punching direction, the invention applies counter-pressure in the opposite direction (against the initial stack) to achieve the same buckling prevention effect. This allows the blank stack to be pushed through by the lifting device alone, eliminating the need for a press ram and maintaining high throughput.
Solution Approach 2:
The counter-pressure device applies a force in the opposite direction to the punching force, creating a balanced pressure system. This counter-pressure prevents the initial stack from bulging during punching, achieving high accuracy without requiring a press ram to push from the front, thus maintaining productivity.
2Manufacturing precision
If a press ram and counter-pressure device are used, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The invention extracts and removes the press ram from the device structure, keeping only the counter-pressure device. This simplifies the overall device complexity while maintaining punching accuracy through the counter-pressure mechanism alone.
Solution Approach 2:
By applying counter-pressure from the opposite side rather than using a press ram from the front, the invention achieves the same buckling prevention effect with a simpler device structure, eliminating the need for complex press ram mechanisms.
3Manufacturing precision
If a press ram is used to eject the blank stack, then manufacturing precision is improved, but loss of time increases
Solution Approach 1:
Instead of using a press ram to push the blank stack forward for ejection, the invention uses counter-pressure to allow the lifting device to push the stack through naturally. This eliminates the time-consuming ejection step and allows continuous operation with the lifting device alone.
Solution Approach 2:
The lifting device continuously pushes the initial stack through the punching blade without interruption from press ram ejection cycles. The counter-pressure device enables this continuous operation by preventing buckling, thus eliminating idle time and maintaining constant productivity.
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 enhances throughput and reduces production costs by eliminating the need for a press ram and allowing for continuous conveyor path alignment, while maintaining accuracy and simplicity in device operation.
Implementation Method 1
a counter-pressure device for generating a counter-pressure on the initial stack in the direction of the lifting device in order to reduce buckling of the initial stack when the punching knife penetrates into the initial stack
Implementation Method 2
a lifting device to push a blank stack through the punching blade by pushing the initial stack against the punching blade in a punching direction
Data Source
Figure 2(a)~2(c)
Figure 2(d)~2(f)
Figure 2(g)~1(b)
AI summary
A die-cutting device for producing shaped labels from an output stack (1, 1', 1") of sheet-shaped material and conveying it to a subsequent banding device along a die-cutting conveying path (7) comprising: a hollow cylindrical die-cutting device (2); a lifting device (3) for pushing a blank stack (4) through the die-cutting device (2) by pushing the output stack (1) in a die-cutting direction (A) against the die-cutting device (2); and a counter-pressure device (6) for generating a counter-pressure (P) on the output stack (1, 1', 1") in the direction of the lifting device (3) to reduce bulging of the output stack (1, 1', 1") when the die-cutting device (2) penetrates the output stack (1);The counter-pressure device (6) is provided to have a counter-pressure element (5) movable from the punching conveyor path (7), which is designed and controlled in such a way that it can be applied to an already punched stack of blanks (4, 4', 4"), so that the counter-pressure (P) can be transferred from one or more already punched stacks of blanks (4, 4', 4") to a subsequent output stack (1, 1', 1") to be punched.