Continuous Film Transport for Stand-Up Pouch Production
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Solution Overview
Problem
Existing devices for producing stand-up pouches subject the film to high tensile forces due to intermittent acceleration and deceleration, leading to film stretch and increased wear of the device components.
Innovation Solution
A device with an electromagnetically driven punching system that accelerates punches in a pulsed manner, allowing continuous film processing without stopping, and a synchronized sealing station moving at the film's speed to prevent mechanical stress and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If intermittent film feed is used for processing, then the film can be processed during standstill phases, but the film is subjected to high tensile forces causing stretching and plastic deformation
Solution Approach 1:
The film is pre-fed continuously at a controlled speed before processing, and the punching operation is performed during this continuous motion. The continuous feed ensures the film is already in position and moving smoothly before the punch engages, eliminating the need for acceleration from standstill and preventing tensile forces that cause stretching.
Solution Approach 2:
Instead of stopping the film to perform punching operations (intermittent feed), the invention inverts the approach by performing the punching operation while the film is in continuous motion. This reversal of the processing sequence eliminates the harmful acceleration-deceleration cycles while maintaining manufacturing capability.
2Productivity
If intermittent film feed with frequent acceleration and deceleration is used, then processing can be performed during standstill, but the device experiences high wear due to acceleration forces
Solution Approach 1:
The film feed is maintained continuously throughout the processing operation rather than being interrupted. The punching system operates during the continuous motion of the film, eliminating repeated acceleration and deceleration cycles. This continuous action reduces mechanical stress on drive components and extends device lifespan while maintaining productivity.
Solution Approach 2:
The film is fed continuously at the required speed before the punching operation begins. This preliminary continuous feeding ensures that when the punch engages, the film is already moving smoothly, eliminating the need for rapid acceleration that causes high wear on mechanical components.
3Speed
If the punching machine accelerates quickly through electromagnetic pulses, then the interaction time with the film is short, but the film must still be stopped for processing in conventional systems
Solution Approach 1:
The film is pre-fed continuously at the appropriate speed before the electromagnetic punch engages. This preliminary action ensures the film is already in position and moving smoothly, allowing the punch to complete its operation during continuous motion without requiring the film to stop, thereby eliminating loss of time.
Solution Approach 2:
The conventional approach of stopping the film for punching is inverted. The electromagnetic punch is designed to operate during continuous film motion, using rapid acceleration to complete the punching action in a short time window while the film keeps moving, thus eliminating stopping time entirely.
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
Prevents film stretch and reduces device wear by maintaining continuous film transport throughout processing, ensuring the film meets mechanical and optical requirements while minimizing mechanical stress and extending equipment lifespan.
Implementation Method 1
the punches are preferably pulsed, and the at least one punch is configured to be accelerated by a first electromagnetic pulse in the vertical or horizontal direction downwards or to the side through the film into a first position
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a device for the production of stand-up pouches, which has a film feeder (1) with which a film (13) is fed to a punching system (6), a folding unit (5) and a sealing station (4), characterized in that the film (13) is transported continuously, in particular without acceleration, by the film feeder (1).