Sack Production Apparatus Vertical Folding Mechanism
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Solution Overview
Problem
Existing bag-making devices face limitations in processing speed and reliability, especially when handling fabric made from stretched plastic ribbons, due to complex end-opening mechanisms that require standstill phases and struggle with separating layers of varying widths.
Innovation Solution
The device employs eccentrically mounted detection devices with suction cups and rotating elements to fold hose ends vertically, allowing simultaneous and continuous separation of material layers, and uses pressure rollers to ensure even folding and pressing, eliminating the need for embossing stamps and enabling continuous operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the upper layer at the ends of the hose section is raised using a suction device and folded back using a slider in the horizontal direction, then the ends of the hose pieces can be opened to form bases, but the processing speed is severely limited and standstill phases are required
Solution Approach 1:
Instead of folding the hose ends in the horizontal direction as in prior art, the patent inverts the approach by folding the ends vertically upward using a folding element that moves in the vertical direction. This allows the material layers to be separated and folded simultaneously during continuous transport, eliminating standstill phases and significantly increasing processing speed while maintaining reliable layer separation
Solution Approach 2:
The patent implements continuous operation by synchronizing the folding element's vertical movement with the continuous transport of hose pieces. The detection devices continuously detect material layers, and the folding element continuously folds ends during transport without requiring the processing line to stop, thereby maintaining continuous useful action and eliminating idle standstill phases
2Reliability
If a slider is used to fold the upper layer horizontally to open hose ends, then layer separation can be achieved, but the device complexity increases and the process requires standstill phases
Solution Approach 1:
The patent replaces the complex horizontal folding slider with a simpler vertical folding mechanism. The folding element moves vertically to fold hose ends upward, and material layers are separated by detection devices that pull layers in opposite vertical directions. This inverted approach simplifies the mechanism while improving reliability through simultaneous detection and folding during continuous motion
Solution Approach 2:
The patent replaces the mechanical slider-based horizontal folding system with a vertically moving folding element combined with detection devices that use controlled material layer separation. This substitution eliminates the need for complex slider mechanisms and embossing stamps, reducing device complexity while maintaining reliable end opening through the vertical folding and detection-based layer separation process
3Reliability
If embossing stamps are used to press the floors, then floor compression can be achieved, but the device complexity increases and continuous operation is hindered
Solution Approach 1:
The patent replaces the mechanical embossing stamp system with a heating element-based floor compression process. The heating element heats and compresses the floor material directly during continuous transport, eliminating the need for complex embossing stamps and associated mechanical pressing mechanisms. This substitution maintains reliable floor sealing through thermal compression while enabling continuous operation without interruption
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 significantly increases processing speed and reliability, allowing for efficient production of bags with different formats by ensuring consistent layer separation and folding, reducing the risk of leaks and improving the cost-benefit ratio.
Implementation Method 1
The upper material layer at the ends of the hose section is then raised using a suction device
Implementation Method 2
each detection device comprises several suction cups arranged on a beam
Implementation Method 3
both press rollers can act on the floor across the entire width
Implementation Method 4
the hot air is applied evenly to the parts to be welded
Data Source
AI summary
The invention describes an apparatus for producing sacks from tubular parts which comprise woven fabrics made from stretched small plastic tapes and are composed of two material layers which lie above one another. The following are contained in said apparatus: - at least one transport device for transporting the tubular parts in a transport direction (x) which extends transversely with respect to their direction (z) of extent, wherein the tubular parts can be conveyed in a horizontal position, and - at least one device for opening at least one end of a tubular part, in order to form bases later. The device for opening at least one end of a tubular part comprises the means for folding over the ends of the tubular parts, by way of which means the two ends of the tubular parts can be moved out of the horizontal position into a vertical position (y), wherein, furthermore, the material layers lie on one another.