Rotary Forming Wheels for Preformed Delicate-Item Packaging
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Solution Overview
Problem
Existing packaging apparatuses are inadequate for delicate items like confectionery products, as they risk deformation due to vigorous handling during wrapping.
Innovation Solution
A packaging apparatus and method where the wrapping is pre-formed around a conveyor, using a pair of wheels with complementary forming members and seats to create a cavity for the item, ensuring the item is not directly shaped by the wrapping process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If bunch wrapping method is used to increase productivity, then production volume is improved, but item integrity deteriorates due to vigorous handling
Solution Approach 1:
The wrapping sheet is pre-formed into a cavity shape before the item is inserted, eliminating the need for vigorous handling during the wrapping process. The forming wheels create the wrapping structure in advance, and the item is gently placed into the pre-formed cavity, thus preserving item integrity while maintaining high productivity
Solution Approach 2:
Instead of wrapping the item by forcing the wrapping sheet around it (traditional bunch wrapping), the invention inverts the process by first forming the wrapping sheet into a cavity and then inserting the item into it. This reverse approach eliminates mechanical stress on delicate items while achieving continuous high-speed packaging
2Reliability
If pre-formed wrapping method is used to preserve item integrity, then item damage is reduced, but device complexity increases due to additional forming mechanisms
Solution Approach 1:
The forming and wrapping functions are merged into a single continuous process using two rotating wheels with complementary forming members. The forming members on one wheel engage with forming seats on the other wheel, combining multiple operations into one integrated mechanism that reduces overall system complexity despite the advanced functionality
Solution Approach 2:
The rotating wheels serve multiple functions: they feed the wrapping sheet, form the cavity shape, and position the wrapping for sealing. This multi-functionality reduces the need for separate dedicated mechanisms for each operation, thereby managing device complexity while achieving the pre-formed wrapping objective
3Productivity
If continuous packaging is implemented to increase productivity, then production speed is improved, but footprint increases due to larger machinery
Solution Approach 1:
The forming members are arranged on rotating wheels in a compact circular configuration, with multiple forming stations nested around the wheel periphery. This nesting allows multiple wrapping operations to occur simultaneously in a compact space, achieving high production speed without proportionally increasing the machine footprint
Solution Approach 2:
The packaging process transitions from a linear sequential arrangement to a circular rotational configuration. The rotating wheels arrange forming members in a compact circular pattern, utilizing radial space efficiently. This dimensional change from linear to circular layout increases productivity while minimizing the horizontal footprint of the machinery
Data Source
Figure 1
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Figure 4A~4D
AI summary
An apparatus for the continuous packaging of items with a wrapping sheet, comprising a continuously rotating forming wheel (10) provided with a plurality of peripheral forming assemblies (12) articulated thereto, and a continuously rotating drawing wheel (16) provided with a plurality of peripheral drawing assemblies (18) articulated thereto; the forming wheel (10) cooperates with the drawing wheel 16 so that the rotational movement of each wheel, in combination with the oscillatory movement of the respective drawing and forming assemblies (12, 18), periodically brings a forming seat (14) into a position facing and coaxial with a drawing member (22), wherein, in said coaxial position, a wrapping sheet is transferred onto the forming seat (14) and the drawing member (22) draws the sheet into said seat (14); the apparatus further comprises a conveyor (24) for the items to be packaged, which cooperates with the forming wheel (10) to insert the item into a respective drawn sheet following its forming; a sealing station (42), positioned downstream of the forming wheel (10), is configured to receive the wrapping sheets containing the respective items from the forming wheel (10) and apply respective sealing elements (S) to said wrapping sheets.