Bag Shaping Box Vacuum Device for Welding Bulge Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bag manufacturing systems produce bags with bulging side walls due to air pressure during the welding process, leading to shape inconsistencies and poor seam quality, which affects the reliability of bag handling and filling processes, especially with bulk materials.
Innovation Solution
Incorporating a partial vacuum device at the bottom end of the shaping box to manage air pressure during the bag formation process, ensuring the bag material is drawn inward and maintains its intended shape, preventing bulging and warpage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If welding jaws close to make the bag bottom seam, then the bag bottom is formed, but air is pressed out into the bag blank causing bulging side walls and excess pressure
Solution Approach 1:
A vacuum device is introduced as an intermediary system between the welding jaws and the bag blank. The vacuum device creates a vacuum chamber that isolates the bag blank from the air pressure generated during welding, allowing the welding process to proceed without causing bulging side walls. The vacuum acts as a mediator that absorbs and manages the excess air pressure.
Solution Approach 2:
The invention creates a vacuum environment (inert atmosphere without air) within the vacuum device to isolate the bag blank from atmospheric air pressure effects. This vacuum environment prevents air from being pressed into the bag blank during the welding process, thereby maintaining the intended shape of the side walls while allowing the bag bottom seam to be formed.
2Strength
If excess pressure is generated in the bag blank during welding, then the bag bottom seam is sealed, but the shape does not regain the originally provided shape and handling reliability is reduced
Solution Approach 1:
The vacuum device serves as an intermediary that protects the bag blank from the harmful effects of excess air pressure during welding. By maintaining a vacuum environment, the system ensures that the bag bottom seam can be sealed effectively while the bag blank does not experience excessive pressure that would compromise its shape and handling reliability.
Solution Approach 2:
The vacuum-created inert environment prevents air pressure from affecting the bag blank during the welding process. This allows the seam to be formed with proper sealing while the bag blank maintains its intended shape, ensuring reliable handling and reducing the risk of deformation that would affect subsequent filling operations.
3Ease of manufacture
If welding jaws close for the following bag bottom, then the seam is made, but air pressure causes wrinkle formation and poor weld seam quality
Solution Approach 1:
The vacuum device acts as an intermediary that isolates the welding process from the bag blank, preventing air pressure-induced wrinkles. By maintaining a vacuum environment, the system allows clean seam formation without the harmful effects of air pressure, thereby improving weld seam quality and manufacturing precision.
Solution Approach 2:
The vacuum-created inert environment eliminates air pressure effects during the welding process, preventing wrinkle formation in the bag material. This allows for high-precision seam making with improved weld quality, as the bag blank is not subjected to air pressure that would cause deformation or poor seam formation.
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
The solution ensures that the manufactured bags retain their intended shape and structure, improving handling and filling efficiency by maintaining the desired contour and preventing seam quality issues.
Implementation Method 1
at least one partial vacuum device (9) is provided which is suitable and configured to generate, at least at the bottom end of the shaping box (3), at least intermittently, at least a minimal, partial vacuum
Data Source
AI summary
Apparatus for manufacturing an open-mouth bag of at least one layer of a flexible bag material, and method of manufacturing a bag by such apparatus. The apparatus includes a shaping device with a shaping box in the contour of the bag shape to be formed, with a top end and a bottom end, a conveying device for transporting the bag material along the shaping box, a closing device for joining the bag material along the shaping box to form a tube, and a closing station for generating a bag bottom, which is disposed beneath the bottom end of the shaping box. A partial vacuum device is configured to generate intermittently, a partial vacuum. When manufacturing a bag, the bag material is draped around the shaping box in the contour of the bag shape to be formed as continuous material and is joined to form a tube by the closing device.