Flexible Package-Forming Machine With Compensating Unit
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Solution Overview
Problem
Existing flexible package-forming machines require costly and complex perforating units to perforate flexible bands at constant speeds, which complicates the production of packages with precise perforations and is not adaptable to different formats.
Innovation Solution
A flexible package-forming machine with a compensating unit that allows intermittent movement of the flexible band for perforation, enabling a perforating unit to operate effectively while maintaining constant speed for folding and welding, using a die-cutting unit and accumulator rollers to manage band tension and speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a high-speed perforating unit is used to perforate the flexible band at constant speed, then perforation precision is improved, but device cost and complexity increase significantly
Solution Approach 1:
The patent applies dynamics by making the perforating unit movable rather than fixed. The perforating unit can move along the flexible band and return to its starting position, allowing it to operate at constant speed during perforation while the band itself can be stationary or move intermittently. This dynamic approach enables precise perforation without requiring a complex high-speed perforating mechanism.
Solution Approach 2:
The patent uses preliminary action by positioning the perforating unit at the desired location before actual perforation occurs. The unit moves to the correct position on the flexible band, then performs perforation at a constant, controlled speed. This preparation phase allows for precise positioning without requiring high-speed operation throughout the entire process.
2Manufacturing precision
If a die-cutting cylinder is used for perforation, then perforation precision is improved, but adaptability to different package formats deteriorates due to the need to replace or modify the cylinder
Solution Approach 1:
The patent makes the perforating unit dynamic and repositionable rather than using a fixed die-cutting cylinder. The unit can move to different positions along the flexible band and adjust its operation based on the required package format. This eliminates the need to replace or modify rigid cylinders when changing formats, while still maintaining precise perforation capability.
Solution Approach 2:
The perforating unit is designed with universal functionality to handle different package formats. By making the unit movable and repositionable, it can serve multiple functions and adapt to various formats without requiring format-specific cylinders, thus achieving both precision and versatility.
3Stability of the object's composition
If the flexible band moves at constant speed through the folding unit, then folding uniformity is improved, but the ability to perform intermittent perforation deteriorates
Solution Approach 1:
The patent segments the production process into distinct phases: a first phase where the flexible band moves at constant speed through the folding unit to ensure uniform folding, and a second phase where the band can be stationary or move intermittently to allow precise perforation. This temporal segmentation allows both requirements to be met without conflict.
Solution Approach 2:
The system dynamically adjusts the motion of the flexible band based on the operational phase. During folding, the band moves at constant speed for uniformity; during perforation, the band can be stationary or move intermittently. The perforating unit itself is also dynamic, moving to position and returning as needed, allowing flexible coordination between folding and perforation operations.
Data Source
AI summary
The present invention relates to a flexible package-forming machine for horizontal packaging and method of manufacturing flexible packages. The proposed forming machine consists of an unwinding unit (11), a perforating unit (12), a folding unit (14), a welding unit (16), and a cutting unit (17), wherein a compensating unit (13) is further included intercalated between the perforating unit (12) and the folding unit (14), linking a section with intermittent forward movement (S1) of the flexible band (1) where the flexible band moves in an intermittent manner and including the perforating unit, and a section with continuous forward movement (S2) where the flexible band moves in a continuous manner and including the folding unit, flexible band being accumulated in said compensating unit during the forward movement of the section with intermittent forward movement (S1) and the accumulation being reduced during breaks in the forward movement of the section with intermittent forward movement.