Vertical Bag-Making Machine with Gusset and Spout Design
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Solution Overview
Problem
Conventional double-gusset bag manufacturing processes require separate bag-making and filling steps, leading to inefficiencies and unstable filled content amounts, especially when a spout portion is included, as they often rely on shutter valves or weight scales for accurate filling.
Innovation Solution
A vertical bag-making/filling/packaging machine that integrates top and bottom gusset formation through heat-welding, along with a conveying, filling, and correcting mechanism to ensure stable content filling, utilizing a top folding portion forming a Z-shape, a bottom folding portion forming an M-shape, and a correcting portion with half-cylindrical plates to maintain the filled shape and seal the bag efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate bag-making and filling processes are used, then manufacturing simplicity is maintained, but manufacturing efficiency and filled content stability deteriorate
Solution Approach 1:
The patent combines the bag-making process and filling process into a single integrated vertical bag-making/filling/packaging machine. The top folding portion forms the top gusset, the bottom folding portion forms the bottom gusset, and the filling portion fills contents simultaneously, eliminating the need for separate processes and achieving both improved efficiency and stable filled content amounts.
Solution Approach 2:
The bag structure is pre-formed with top and bottom gussets created through heat-welding before the filling operation. The top seal portion creates a tube shape by heat-welding the first fold and side edges, while the bottom seal portion seals the bottom gusset, preparing the container in advance for stable content filling without requiring complex control mechanisms.
2Manufacturing precision
If no shutter valve or weight scale is used, then device complexity is reduced, but filled content stability deteriorates
Solution Approach 1:
The bag structure itself provides the filling control mechanism. The top gusset and bottom gusset formed through heat-welding create a self-contained container with natural flow control. The spout portion protruding from the top gusset allows gravity-assisted filling without requiring external shutter valves or weight scales, achieving stable filled content through the bag's own geometric design.
Solution Approach 2:
The patent changes the physical parameters of the bag structure by creating specific fold patterns (Z-shape at top, M-shape at bottom) and heat-welding them to form a tube shape. This geometric parameter change creates a container that naturally regulates content volume through its structure, eliminating the need for complex electronic control systems.
3Ease of manufacture
If double-gusset bag with spout portion is manufactured, then display effectiveness is improved, but filled content stability deteriorates
Solution Approach 1:
The bag is segmented into distinct functional portions: top gusset for display and opening, bottom gusset for structural support, and spout portion for filling control. The top folding portion creates the top gusset with spout, while the bottom folding portion creates the bottom gusset, allowing each segment to serve its specific function while maintaining overall structural integrity and filling stability.
Solution Approach 2:
The bag features asymmetric design with the spout portion protruding from one side of the top gusset rather than being uniformly distributed. This asymmetric configuration optimizes both display effectiveness and filling control, as the spout provides a controlled opening while the asymmetric shape maintains structural stability during filling operations.
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 integrated approach enables efficient manufacturing of double-gusset bags with a stable filled amount, even without a shutter valve or weight scale, by forming a tube shape and sealing the bag body in a single process, ensuring consistent content distribution and improved loading efficiency.
Implementation Method 1
a top seal portion which forms a top gusset and a spout portion protruding from the top gusset by heat-welding the first fold and side edges of the film so as to make the film into a tube shape
Implementation Method 2
a bottom-seal portion which forms a bottom gusset by heat-welding the second fold
Implementation Method 3
an auxiliary top seal portion which forms a part of the top gusset by heat-welding a mountain fold of the first fold
Data Source
AI summary
A vertical bag-making/filling/packaging machine (1) includes: a top folding portion (20) which forms a first fold (F1) by folding a side of a band-shaped film (F) into a Z-shape; a bottom folding portion (30) which forms a second fold (F5) by folding a center of the film (F) into an M-shape; a top seal portion (40) which forms a top gusset (G3) and a spout portion (G7) protruding from the top gusset (G3) by heat-welding the first fold (F1) and side edges (E1 and E2) of the film (F) so as to make the film (F) into a tube shape; and a bottom-seal portion (50) which forms a bottom gusset (G4) by heat-welding the second fold (F5).