Bag Production Pressure Rollers for Continuous Bottom Fixation
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Solution Overview
Problem
Existing bag production devices face inefficiencies in fixing opened bottoms, leading to reduced performance due to the time required to secure the folds, especially with hose pieces made of stretched plastic ribbons, where the folds tend to revert, and previous solutions like forming stamps or pressure rollers are either mechanically demanding or insufficiently precise.
Innovation Solution
A device employing rotatable pressure rollers with an adjustable gap, mounted parallel to the hose pieces' direction of extension, allows for immediate transportation of hose pieces after opening, ensuring continuous production and optimal fixation of the opened ends without the need for mechanical effort or shape-specific molds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If forming stamps are used to fix the opened bottoms, then the folds are secured, but the production time increases significantly
Solution Approach 1:
The patent replaces static forming stamps with dynamic pressure rollers that continuously move with the hose pieces during transport. This allows the pressing action to occur during the natural flow of production rather than requiring a separate stationary pressing step, thereby reducing cycle time while maintaining fixation quality
Solution Approach 2:
The pressure rollers are integrated into the transport system, allowing the pressing action to occur continuously as hose pieces move through the device. This eliminates idle time between opening and fixation operations, maintaining continuous production flow while ensuring proper fixation of opened bottoms
2Manufacturing precision
If shape-specific forming stamps are used, then precise fixation is achieved, but device complexity and manufacturing effort increase
Solution Approach 1:
The pressure rollers are designed with universal applicability, using cylindrical surfaces that can accommodate various hose piece shapes and sizes through adjustable positioning. This eliminates the need for multiple shape-specific molds, reducing device complexity while maintaining precise fixation through adaptable contact surfaces
Solution Approach 2:
The patent employs adjustable pressure rollers where parameters such as pressure force, position, and contact area can be modified to suit different hose piece configurations. This flexibility allows a single universal pressing mechanism to achieve precise fixation for various shapes without requiring complex shape-specific tooling
3Manufacturing precision
If hose pieces are stopped for fixation, then proper folding is achieved, but production speed decreases
Solution Approach 1:
The pressure rollers are integrated into the continuous transport system, allowing folding and fixation to occur simultaneously during motion. This eliminates stopping cycles while maintaining fold quality through consistent pressure application throughout the pressing zone
Solution Approach 2:
The hose pieces are pre-positioned and pre-folded before reaching the pressure rollers, so that the rollers only need to apply finishing pressure during continuous transport. This preliminary preparation ensures proper fold formation is achieved in advance, allowing the pressing action to be a simple continuous operation rather than a time-consuming stopping step
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 the production rate by allowing continuous transportation and precise fixation of the opened ends, minimizing mechanical effort and preventing fold reversion, thus enhancing overall device performance.
Implementation Method 1
a pressing means in the form of a pressure roller (23, 23') with a counter support is provided, through which at least parts of the opened floor can be guided
Data Source
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AI summary
The invention relates to a device for producing bags (1) from pieces (13) of tubing which can be transported in a transport direction (x) transversally to the longitudinal direction of the pieces of tubing by means of the device (1). The pieces (13) of tubing preferably comprise a fabric consisting of stretched plastic strips (2) and consist of two layers of material arranged one above the other. The device comprises the following components: at least one element (8) for opening an end (13) of a piece of tubing, by which means part of the end of the piece of tubing can be folded back onto a wall of the piece of tubing in order to open the end, such that said opened end can be attached to a bottom; and at least one pressure means for pressing at least parts of the opened end against a counter-layer in order to form fold edges. At least one transport means (30) is used to transport the piece of tubing in the direction of transport (x) once an end of said piece of tubing has been opened and before the action of the pressure means.