Rotating Transverse Sealing Unit for Compact VFFS Machines
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vertical form fill sealing machines face challenges in achieving a compact and efficient design for the transverse sealing device, which is cumbersome to maintain and requires significant space and drive force for rotation.
Innovation Solution
The transverse sealing device is mounted on a machine frame to rotate around a rotation axis, guided by a guide unit with integrated or detachable guide elements, allowing for a compact, space-saving arrangement and smooth rotation without translational movements, facilitated by a drive unit and control system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the transverse sealing device is made compact and arranged within a circular cylindrical receiving area, then the machine space is reduced and maintenance becomes easier, but the drive force required for rotation increases
Solution Approach 1:
The transverse sealing device is arranged within a circular cylindrical receiving area defined by guide elements, creating a curved rotational path that optimizes space utilization while maintaining efficient rotation characteristics
Solution Approach 2:
The sealing device rotates around a vertical rotation axis, transitioning from horizontal linear movement to vertical rotational movement, thereby reducing the horizontal space requirement while maintaining sealing functionality
2Ease of repair
If the transverse sealing device is mounted to rotate as a whole around a rotation axis, then the structure is simplified and maintenance is improved, but the sealing precision during rotation may be compromised
Solution Approach 1:
The transverse sealing device is segmented into a rotating assembly that includes the sealing jaws and associated components, allowing the entire sealing mechanism to rotate as a unified module while maintaining internal alignment and sealing precision
Solution Approach 2:
Instead of moving the sealing jaws individually along linear paths, the entire sealing device is rotated around a vertical axis, inverting the conventional movement approach while achieving the same sealing function through rotational motion
3Device complexity
If guide elements are integrated into the machine frame, then the device complexity is reduced and manufacturing is simplified, but the adjustability and flexibility of the sealing device decreases
Solution Approach 1:
The guide elements serve multiple functions: they define the circular cylindrical receiving area, guide the rotation of the sealing device, and provide structural support, thereby reducing the need for separate guiding mechanisms while maintaining flexibility
Data Source
AI summary
A vertical form fill sealing machine includes a machine frame and at least one transverse sealing device for sealing a packaging material transversely. The transverse sealing device is mounted on the machine frame such that it can be rotated around a rotation axis of the transverse sealing device at least substantially as a whole. A guide unit guides the rotation of the transverse sealing device around the rotation axis at least substantially as a whole. The guide unit includes at least one guide element that delimits at least partially an at least substantially circular cylindrical receiving area within which the transverse sealing device is at least substantially completely arranged. The transverse sealing device includes at least one movement unit, at least two sealing jaws, and at least one guide unit to guide the at least two sealing jaws during a movement.