Vertical Packaging Machine Protective Assembly
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Solution Overview
Problem
Vertical packaging machines face issues with product damage due to gravity-induced acceleration within the forming tube, leading to film tube integrity problems, and existing solutions either reduce productivity or increase complexity and maintenance.
Innovation Solution
A protective assembly with a flexible first element and a rigid second element is used between the forming tube and the sealing and cutting device, which passively moves between operational and non-operational positions to absorb product impact without actuators, ensuring the film tube's integrity without material degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the forming tube length is increased to accommodate more product, then productivity is improved, but product damage risk increases due to greater gravity-induced acceleration
Solution Approach 1:
A protective assembly is introduced as an intermediary element between the forming tube and the sealing/cutting device. This assembly includes a flexible first protection element that can deform to absorb product impact, and a rigid second protection element that provides structural support. The protective assembly mediates the harmful gravitational acceleration effect by cushioning the product before it reaches the film tube, allowing longer forming tube lengths without increasing damage risk.
Solution Approach 2:
The flexible first protection element is positioned to receive the product before it impacts the film tube. This element deforms elastically upon product impact, absorbing the kinetic energy generated by gravity-induced acceleration. By providing beforehand cushioning, the system prevents the product from transmitting impact forces to the film tube, enabling longer forming tube lengths while maintaining product integrity.
2Object-affected harmful factors
If platforms are added inside the forming tube to support product, then product damage is reduced, but film consumption increases and productivity decreases
Solution Approach 1:
The protective function is extracted from the forming tube interior and relocated to a separate protective assembly positioned at the outlet end. This eliminates the need for internal platforms within the forming tube, maintaining the original forming tube geometry and productivity while providing the necessary product protection through the external protective assembly with its flexible and rigid protection elements.
3Object-affected harmful factors
If the forming tube inclination is reduced to slow product fall, then product damage is reduced, but productivity decreases
Solution Approach 1:
The protective assembly acts as an intermediary that decouples the forming tube inclination from product protection requirements. The system can maintain a vertical or near-vertical forming tube for high productivity, while the protective assembly's flexible first protection element absorbs the impact forces that would otherwise be generated by gravity-induced acceleration, eliminating the need to reduce inclination for protection purposes.
4Reliability
If a protective device is added between forming tube and sealing device, then film tube protection is improved, but device complexity increases
Solution Approach 1:
The protective assembly merges two protection elements (flexible first element and rigid second element) into a single integrated structure that can be positioned as one unit between the forming tube and sealing device. This combining approach provides comprehensive protection while minimizing the increase in device complexity compared to adding separate protective mechanisms.
Solution Approach 2:
The first protection element utilizes flexible material properties to absorb impact forces through elastic deformation. This flexible shell approach provides effective protection without requiring complex mechanical structures, as the protection mechanism is inherent in the material's elastic properties rather than complex actuated mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively protects the film and final package from product impact, maintaining productivity while simplifying the machine's design, reducing maintenance, and preventing material detachment, thus ensuring high-quality packaging.
Implementation Method 1
a first flexible protection element (3.1) comprising a junction area (3.11) joined to the forming tube (1)
Implementation Method 2
a second protection element (3.2) which is more rigid than the first protection element (3.1) and which partially covers the first protection element (3.1)
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a vertical packaging machine comprising a forming tube (1); a sealing and cutting device downstream of the forming tube (1), which is configured to seal and cut transversely a film tube; and a protection assembly (3) which is arranged at least partially between the forming tube (1) and the sealing and cutting device and comprising a first protection element (3.1) which is flexible and which comprises a junction area joined to the forming tube (1). The protection assembly (3) comprises a second protection element (3.2) which is more rigid than the first protection element (3.1) and which is attached to said first protection element (3.1) partially covering said first protection element (3.1) downstream of the junction area of said first protection element (3.1).