Paper Doy-Pack Bag Forming Machine with Universal Gripping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing packaging machines for forming doy-pack bags are limited by their requirement for plastic materials, inability to handle paper films, and complexity, making them unsuitable for small-scale, versatile, and cost-effective applications, especially in industries seeking to reduce plastic use.
Innovation Solution
A packaging machine designed to form doy-pack bags using paper materials, featuring a gripping and folding group, pushing means, joining means, and pick-up means, which allows for the formation of bags with a recessed bottom and sealed edges, and is compact and less complex, enabling operation with paper sheets and films.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a vertical forming group with tracks and rollers is used to form doy-pack bags, then industrial production efficiency is improved, but the machine can only process plastic materials and cannot handle paper films
Solution Approach 1:
The patent redesigns the forming group to be material-agnostic, allowing it to process both plastic films and paper sheets. The key changes include replacing plastic-specific traction mechanisms with universal gripping means (such as suction cups or mechanical grippers) that can handle different material types without damage, and modifying the folding and sealing mechanisms to accommodate the different mechanical properties of paper versus plastic.
Solution Approach 2:
The patent adjusts operational parameters such as gripping force, folding speed, and sealing temperature/pressure to be adaptable to different materials. For paper sheets, lower gripping forces and different sealing parameters are used compared to plastic films, allowing the same machine to process multiple material types effectively.
2Force
If tracks and rollers apply traction at high angles and pressures to move the packaging band, then downward dragging force is improved, but paper material films tear quickly under the same conditions
Solution Approach 1:
The patent modifies the traction parameters specifically for paper materials by reducing the angle of application and lowering the pressure exerted by the gripping means. This prevents excessive stress concentration that would cause paper to tear, while still maintaining sufficient force to move the material through the forming process.
Solution Approach 2:
The patent introduces intermediate gripping elements (such as soft grippers or suction surfaces) that mediate between the mechanical drive system and the paper material. These intermediaries distribute the traction force more evenly across the paper surface, preventing localized stress concentrations that lead to tearing.
3Reliability
If a complex forming group with shell, shaping collar, and multiple joining means is used, then sealed pouch formation capability is improved, but machine complexity and cost increase
Solution Approach 1:
The patent extracts and eliminates unnecessary components from the traditional forming group design. Specifically, it removes the complex shell and shaping collar structures that are not essential for the basic function of forming doy-pack bags, retaining only the critical elements needed for folding, joining, and sealing operations.
Solution Approach 2:
The patent segments the forming process into distinct, independent modules (folding module, joining module, sealing module) that can be optimized separately. This modular approach simplifies the overall system while maintaining functionality, as each module performs a specific task rather than requiring a complex integrated structure.
4Productivity
If a large footprint forming group is installed, then industrial production capacity is improved, but space availability in small-scale craft laboratories is reduced
Solution Approach 1:
The patent employs a compact, nested arrangement where components are arranged vertically and overlappingly rather than horizontally. The gripping and folding means are positioned to operate in overlapping spaces, and the joining means are integrated into the existing structure, minimizing the overall floor space required while maintaining production capacity.
Data Source
AI summary
A packaging machine for forming doy-pack bags includes: a base; a reel-holding frame, configured to carry a reel of packaging film or a sheet-holding reel having a band with packaging sheets; a gripping and folding group configured to pick up and fold like a book, by facing two symmetrical parts thereof, either a portion of the packaging film or a packaging sheet; shaping apparatus for shaping a recessed bottom (B) of a doy-pack bag (A); a joiner for sealing the facing side edges of the two symmetrical parts either of a portion of the packaging film or of a packaging sheet; pick-up apparatus adapted to remove the portion of the packaging film or the packaging sheet, folded and with the facing side edges sealed, from the gripping and folding group.