W-Shaped Web Quad-Seal Container Manufacturing
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Solution Overview
Problem
The complexity and high cost of machines used to manufacture 'quad-seal' type flexible containers with four side faces, which require multiple sheets and intricate manipulation, make them economically viable only for products with high profit margins and limit packagers' control over container production and flexibility.
Innovation Solution
A method and machine module that allow the production of 'quad-seal' type containers using a continuous web folded into a W-shaped pleated area, with inserted folded sheets forming dividing walls before transverse cuts, enabling the same machine to produce both 'doy-pack' and 'quad-seal' containers with reduced sheet requirements and simplified operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple sheets are used to form each side wall and base of the container, then the container structure is achieved, but the manufacturing complexity and machine cost increase significantly
Solution Approach 1:
The patent combines multiple separate sheets (base sheet and four side wall sheets) into a single integrated container blank. This single blank is then continuously fed through the forming process, eliminating the need for complex machine operations to handle and bond multiple separate sheets, thereby reducing machine complexity while maintaining container structure integrity
Solution Approach 2:
The single container blank serves multiple functions: it forms the base, all four side walls, and includes pre-formed sealing flanges and reinforcement elements. This multi-functional design eliminates the need for separate components and simplifies the manufacturing process, reducing both manufacturing complexity and machine requirements
2Quantity of substance
If the same sheet forms both the first larger side face and the lower base, then sheet usage is optimized, but critical area manipulation complexity increases
Solution Approach 1:
The container blank is pre-formed with the base and side walls in their final spatial relationships before the forming process. The base is pre-flattened and pre-positioned relative to the side walls during blank fabrication, eliminating the need for complex mid-process manipulation and flattening operations during container formation
3Manufacturing precision
If dedicated machines are used for quad-seal container production, then manufacturing precision is maintained, but production flexibility and adaptability decrease
Solution Approach 1:
The forming machine is designed with adjustable and reconfigurable components that can adapt to different container specifications. The continuous forming process allows dynamic adjustment of parameters such as container size, side wall height, and sealing configurations, enabling the same machine to produce various container types while maintaining precision through controlled forming operations
Data Source
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AI summary
A method for the manufacture of flexible containers of the type comprising a lower base and four side faces comprising supplying a W-shaped folded web determining an inverted "V" shaped bottom, with a central fold being distinguished, and the steps of inserting folded sheets between the opposite walls of the W-shaped web so that, at least, one bonding portion of each folded sheet is attached to the opposite walls and to the bottom of the web in the shape of an inverted "V", and to bond these folded sheets to the web at said bonding portion or portions to determine dividing walls on the web prior to performing transverse cuts on the web to individualise a container, the cuts being distanced so that each container includes, at least, two of said dividing walls that will form respective side walls on each container.