Cuboid Package Form Stabilization via Segmented Conveyance
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Solution Overview
Problem
Existing methods for shaping and stabilizing cuboid packages, particularly hinged box or hinge lid type cigarette packs made of thin cardboard, face issues with maintaining exact pack shape due to undesirable deformations and impairment of glue connections during the setting of glue connections, especially when using elongated molding channels with pressure transmission.
Innovation Solution
The method involves transporting packs through molding channels without pressure or contact, using separate conveying elements attached to the pack's end wall or bottom wall for each conveying cycle, and adjusting the molding channel's cross-section with spacers to prevent deformation, while an adjustable transfer conveyor ensures precise handling and adaptation to different pack formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If packs are transported through molding channels by means of mutual pressure transfer, then the packs can be conveyed through the molding channel, but undesirable deformations of the packs occur and glue connections are impaired
Solution Approach 1:
The conveying system is segmented into separate conveying elements (pushers, guides) that individually handle each pack rather than using continuous pressure transfer. Each pack is conveyed by its own dedicated elements, preventing deformation from mutual pressure while maintaining efficient conveyance through the molding channel.
Solution Approach 2:
Separate conveying elements act as intermediaries between the drive mechanism and the packs. These elements (pushers, guides) transmit the necessary force for conveyance while controlling the contact points to prevent deformation of the pack shape and protection of glue connections.
2Productivity
If packs are conveyed in close contact with each other, then space utilization is improved, but shape retention is impaired due to direct transmission of thrust force
Solution Approach 1:
The conveying elements are designed to contact only specific local areas of the packs (e.g., bottom surfaces or designated contact points) rather than applying pressure across the entire pack surface. This localized contact allows packs to be conveyed in close proximity while preventing thrust force transmission that would deform the pack shape or damage glue connections.
3Device complexity
If fixed molding channel dimensions are used, then device complexity is reduced, but adaptability to different pack formats is limited
Solution Approach 1:
The molding channel structure incorporates adjustable components (movable walls, reconfigurable guides) that can be dynamically repositioned to accommodate different pack formats. This dynamic adjustability allows the same device to handle multiple pack sizes and configurations without requiring complete redesign, balancing structural simplicity with operational versatility.
Solution Approach 2:
The molding channel is designed with universal features that can serve multiple pack formats through adjustment mechanisms. The same basic structure can be reconfigured to accommodate different dimensions and shapes, making the device multi-functional while avoiding the need for multiple dedicated molding channels for each pack type.
Data Source
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AI summary
In a post-treatment process for cigarette packs, particularly those with cuboid shapes and glued flaps, the packs (10) are transported in forming pockets or channels (22) of a drying wheel (24) during a phase for hardening the glue bonds and maintaining or improving the outer shape of the pack. The packs (10) are fed by a transfer turret (31), inserted into the forming channels (22) by push elements, and transported within them in several, particularly two, push cycles until ejection. To prevent deformation, it is ensured that the packs (10) do not lie against each other during the push cycles and are transported individually, rather than being subjected to mutual pressure.