Multi-layer Pack Forming Unit with Vertical Elevator
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Solution Overview
Problem
Current packaging systems lack flexibility and are costly, as they are limited to forming packs with only two layers, making them inefficient for producing multi-layer packs and increasing the cost of machines, which hinders market adoption.
Innovation Solution
A unit with multiple conveyor surfaces and retaining means that allows for the formation of multi-layer packs by synchronizing the movement of layers and using a vertical elevator to position and release layers efficiently, enabling the creation of packs with any number of layers while maintaining low costs and high production rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional packaging systems with single or double layers are used, then machine reliability and output are guaranteed, but the system lacks flexibility and cannot produce multi-layer packs
Solution Approach 1:
The forming unit is segmented into multiple independent conveyor surfaces (first conveyor surface, second conveyor surface, third conveyor surface) that can operate autonomously. Each surface can convey layers independently to the elevator, allowing flexible combination of 2, 3, or 4 layers without requiring a completely different machine configuration. This segmentation enables the system to adapt to different pack requirements while maintaining manageable complexity through modular design.
Solution Approach 2:
The elevator serves multiple functions: it receives layers from different conveyor surfaces, stacks them vertically to form multi-layer packs, and transfers the completed packs to the packaging line. The same elevator mechanism handles both the lifting and stacking operations, eliminating the need for separate mechanisms and reducing overall system complexity while providing universal functionality for multi-layer pack formation.
2Adaptability or versatility
If multiple conveyor surfaces are added to enable multi-layer pack formation, then versatility improves, but device complexity and cost increase
Solution Approach 1:
Multiple conveyor surfaces (first, second, and third conveyor surfaces) are merged into a unified system that feeds a single vertical elevator. The elevator acts as a central integration point that consolidates layers from different surfaces and stacks them vertically. This merging approach allows the system to handle multiple layers using shared infrastructure rather than requiring completely separate handling systems for each layer, thereby reducing complexity compared to having independent packaging lines for each layer.
Solution Approach 2:
The system transitions from horizontal layer arrangement to vertical stacking by using the elevator to transport layers upward. Instead of arranging multiple layers side-by-side horizontally, the conveyor surfaces feed layers onto the elevator which then stacks them vertically to form multi-layer packs. This dimensional change from horizontal to vertical organization enables multi-layer pack formation without proportionally increasing the horizontal footprint or complexity of the conveying system.
3Productivity
If traditional two-layer forming units are used, then production output is maintained, but the system cannot meet consumer demand for compact multi-layer packs
Solution Approach 1:
The conveyor surfaces operate continuously to feed layers to the elevator, which maintains continuous vertical stacking action. The system avoids interruptions by having multiple conveyor surfaces that can continuously supply layers to the elevator, ensuring that the pack formation process maintains high productivity. The continuous operation of conveyors combined with the elevator's continuous lifting and stacking action ensures sustained production output while enabling flexible multi-layer pack configuration.
Data Source
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AI summary
A unit for forming a pack (1) of products (2) for a packaging machine (3) comprises: means (5) for feeding layers (S) of products (2) towards an elevator (6), forming an end zone for receiving products (2) in layers (S), the elevator moving vertically in both directions, between a lowered position in which it receives layers (S), and a raised position for releasing the pack (1), to the machine (3); means (7) for retaining a first single layer (S1) of products (2) at a predetermined height, acting on either side at the ends (2a,2b) of the products (2), and located in a zone between the elevator (6) lowered position and its raised position, thus allowing the first layer (S1) of products (2) to be retained in a stand by position at a predetermined height; control means (8) acting between the elevator (6) and the retaining means (7), allowing co-ordination between activation/deactivation of the retaining means (7) and the elevator (6) strokes (C).