Multirow Bag Forming Device Shared Spindle Alignment
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Solution Overview
Problem
Multirow three-side-sealing packaging machines face complexity and high manufacturing costs due to the need for synchronous control devices to achieve simultaneous bag pulling, longitudinal sealing, transversal sealing, and cutting of multiple packaging film straps.
Innovation Solution
A bag forming device with at least two units, each comprising a deflection element and a folding element, where the packaging film is moved to adjust its direction to allow simultaneous operations without requiring synchronous control devices, using a deflection element with inclined transition surfaces and a path adjustment mechanism to align longitudinal openings for shared spindle operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate bag pulling units with spindles are provided for each packaging film strap to achieve simultaneous bag pulling, longitudinal sealing, transversal sealing and cutting, then the packaging machine can perform all operations simultaneously, but the structure becomes complicated and manufacturing cost increases due to required synchronous control devices
Solution Approach 1:
The patent merges multiple separate bag pulling units into a single shared spindle system. Instead of providing individual spindles for each packaging film strap, the invention uses one or more spindles that can simultaneously drive bag pulling rollers for multiple film straps, thereby reducing the number of synchronous control devices needed while maintaining simultaneous operation capability
Solution Approach 2:
The spindle is designed to perform multiple functions - it serves as the driving element for bag pulling rollers across different bag forming units simultaneously. This universal spindle can drive rollers for multiple packaging film straps through a shared transmission mechanism, eliminating the need for dedicated spindles for each unit
2Productivity
If packaging film is provided from rear to front of forming tube with longitudinal openings facing perpendicular direction, then the bag forming process can proceed, but separate sets of bag pulling, sealing and cutting units are required for each film strap
Solution Approach 1:
The patent changes the orientation arrangement of longitudinal openings from perpendicular to parallel with the forming tube axis. This dimensional reorientation allows multiple film straps to be processed in a collinear arrangement, enabling shared use of spindles, sealing units, and cutting mechanisms across multiple bag forming units
Data Source
AI summary
A bag forming device and a bag machine are provided. The bag forming device comprises at least two bag forming units, wherein each bag forming unit comprises a deflection element and a folding element, and the forming tubes of the folding elements are arranged in a first direction in sequence. The packaging film is moved in a moving route when moving through the deflection element, and film moving positions are provided in the deflection element in the moving route for passing through of the packaging film to make deflection of the packaging film. The present invention reasonably adjusts the moving direction of the packaging films, and the direction of the longitudinal openings of the packaging films after longitudinal folding. When it is used in a multirow packaging machine, simultaneous bag pulling, longitudinal sealing, transversal sealing and cutting of the respective packaging film straps can be achieved, by reasonable cooperation of the bag pulling unit, the transversal sealing unit, the longitudinally sealing unit, and the cutting unit, without providing any synchronous control device, and thus solves the problem of complicated structure and high manufacturing cost in multirow packaging machine.