Stacking Surface Dynamics for Layer Alignment in Packaging
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Solution Overview
Problem
In the tissue paper converting industry, existing devices struggle with aligning and compacting superposed layers of products, such as rolls of toilet paper or packs of napkins, leading to defects and jamming issues during packaging due to incorrect alignment and level differences.
Innovation Solution
A device with a vertically movable stacking surface and reciprocally moving parallel walls is used to prevent interference and misalignment between layers, ensuring proper alignment and compacting by maintaining the upper layers raised during the stacking process, utilizing conveyors to feed and position the layers on the stacking surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional stacking devices are used to form superposed layers of products, then packaging production can proceed, but incorrect alignment and level differences between layers occur, causing defects and jamming during subsequent packaging
Solution Approach 1:
The stacking surface is made movable in the vertical direction, allowing dynamic adjustment of the stacking surface position. This enables the surface to move down after each layer is deposited, preventing the upper layers from sliding on the lower layers and ensuring proper alignment, thereby resolving the contradiction between packaging reliability and alignment precision
Solution Approach 2:
The device performs preliminary alignment and compacting of each layer before the next layer is deposited. By lowering the stacking surface after each layer is placed, the system pre-establishes proper alignment and compactness, preventing subsequent misalignment issues during packaging operations
2Ease of operation
If upper layers are allowed to slide on lower layers during stacking, then the stacking process is simpler, but misalignment and level differences occur causing defects
Solution Approach 1:
The movable stacking surface dynamically changes position after each layer is deposited, moving down to prevent sliding between layers. This dynamic adjustment maintains alignment precision without significantly complicating the stacking operation, as the surface automatically adapts to each layer's position
Solution Approach 2:
By lowering the stacking surface after each layer is placed, the system creates an equipotential state where the next layer can be deposited without sliding on the previous layer. This ensures all layers are properly aligned at the same level, eliminating misalignment defects while maintaining operational simplicity
3Device complexity
If the stacking surface remains stationary during layer deposition, then the structure is simpler, but interference and misalignment occur between layers
Solution Approach 1:
The stacking surface is designed with vertical movability, adding minimal complexity while enabling precise control over layer alignment. The surface moves down after each layer is deposited, preventing interference and misalignment, thereby achieving high alignment precision with only slight increase in structural complexity
Solution Approach 2:
The movable stacking surface performs preliminary positioning and alignment of each layer before the next layer is deposited. This preliminary action ensures proper alignment and prevents interference between layers, achieving high manufacturing precision without requiring complex additional alignment mechanisms
Data Source
AI summary
The device comprises a stacking surface (3) movable in a substantially vertical direction, on which layers (S1, S2, S3) of products (P) to be packaged are superposed, and a pair of conveyors (7, 9) substantially superposed to feed the layers of products to the stacking surface. The device also comprises a pair of walls (31 A, 31 B) substantially parallel, and substantially vertical, between which the layers of products are inserted by the conveyors when they are stacked on the stacking surface. The walls move reciprocally towards and away from each other to take a position of greater reciprocal distance, in which they do not interfere with the products deposited on the stacking surface, and a position of lesser reciprocal distance, in which they interfere with the products inserted therebetween.