Packaging Bag Manufacturing System for Self-Standing Stability
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Solution Overview
Problem
Existing packaging bags for microwave use are inefficient to manufacture due to time-consuming welding processes, lack self-supporting stability, are difficult to open, and pose challenges in user convenience when used as tableware.
Innovation Solution
A manufacturing system for packaging bags that includes a film supply device, conveying device, bottom insertion device, bottom sealing device, transverse sealing device, and cutoff device, which efficiently welds the films to form a self-standing bag with improved stability and user convenience features such as a wide opening and gripping portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the front surface film, back surface film, and bottom surface film are welded to each other to form a packaging bag, then the bag structure is formed and sealed, but the manufacturing process becomes time-consuming
Solution Approach 1:
The bottom surface film is pre-folded into a specific shape before insertion between the front and back surface films. This preliminary preparation allows for faster assembly and welding, as the bottom film is already positioned correctly and only requires attachment to the side films, rather than requiring complex in-process manipulation and multiple welding operations.
2Stability of the object's composition
If the lower end of the center part is opened widely in the front-back direction to make the bag self-supporting, then the self-standing stability is improved, but the opening quickly closes when used as tableware
Solution Approach 1:
The bottom surface film is divided into multiple regions with different functions: a first region that forms the widely opened self-supporting structure, and a second region that can be folded to maintain the opening. This segmentation allows the bag to simultaneously achieve self-standing stability and opening maintainability when used as tableware.
Solution Approach 2:
The second region of the bottom surface film is designed to be dynamically foldable, allowing it to transition between a flat state (when the bag is sealed) and a support state (when the bag is opened and used as tableware). This dynamic flexibility enables the opening to be maintained in an open position without requiring additional fastening mechanisms.
3Stability of the object's composition
If the bag is made self-supporting by opening the bottom end widely, then the bag can stand on its own, but it becomes difficult to grasp the bag due to heating in microwave oven
Solution Approach 1:
The gripping portion is positioned at the bottom surface of the bag, utilizing the vertical dimension and the bottom surface area for grasping. This allows users to hold the bag from the bottom rather than from the sides or top, providing a secure grip even when the bag is heated in a microwave oven, while maintaining the self-supporting structure.
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 manufacturing system significantly reduces manufacturing time, enhances self-supporting stability, improves user convenience by making the bag easier to open and grasp, even when heated.
Implementation Method 1
the bottom sealing device is configured to weld the bottom long film to the front surface long film and to the back surface long film
Implementation Method 2
the transverse sealing device forms a transverse seal portion extending in a direction perpendicular to the conveyance direction so as to weld the front surface long film and the back surface long film to each other
Data Source
AI summary
The present invention provides a manufacturing system of a packaging bag with excellent manufacturing efficiency. According to the present invention, provided is a manufacturing system of a packaging bag, including: a film supply device; a conveying device; a bottom insertion device; a bottom sealing device; a transverse sealing device; and a cutoff device, wherein the film supply device supplies a front surface long film and a back surface long film facing each other, the conveying device is configured to convey the front surface long film and the back surface long film, the bottom insertion device, the bottom sealing device, the transverse sealing device, and the cutoff device are arranged in this order along a conveyance direction, the bottom insertion device is configured to start inserting a bottom long film between the front surface long film and the back surface long film at an insertion start position and to complete insertion of the bottom long film at an insertion completion position downstream from the insertion start position, the bottom sealing device is configured to weld the bottom long film to the front surface long film and to the back surface long film, the transverse sealing device forms a transverse seal portion extending in a direction perpendicular to the conveyance direction so as to weld the front surface long film and the back surface long film to each other, and the cutoff device cuts off the front surface long film, the back surface long film, and the bottom long film along the transverse seal portion.