Packaging Machine Welding Bar Repositioning for Stress Reduction
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Solution Overview
Problem
Traditional packaging machines for paper rolls apply high mechanical stresses, energy consumption, and thermal deformations due to rapid packaging speed and high sealing pressures, leading to operational inefficiencies and safety concerns.
Innovation Solution
The machine design includes a modified conveyor system with independent carriages and a repositionable welding bar to reduce packaging speed, allowing for lower sealing pressure and temperature, and increased operational safety by enabling longer welding times and improved airflow for heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If packaging speed is increased to improve productivity, then production output increases, but mechanical stresses on products and wear on sealing elements increase
Solution Approach 1:
The conveyor system uses independently controllable carriages that can adjust their speed dynamically. This allows the packaging machine to vary the conveyor speed according to the specific packaging requirements and product characteristics, optimizing the balance between productivity and mechanical stress on products.
Solution Approach 2:
The system allows changing the packaging speed parameter to reduce mechanical stresses. By operating at lower speeds when necessary, the machine reduces wear on sealing elements and mechanical components while maintaining adequate productivity through efficient cycle management.
2Reliability
If sealing pressure and temperature are increased to improve sealing quality, then welding reliability improves, but energy consumption and wear on sealing elements increase
Solution Approach 1:
The system optimizes sealing parameters (pressure and temperature) to achieve reliable welding at lower energy consumption levels. By carefully controlling and adjusting these parameters based on the specific packaging material and product requirements, the machine maintains high welding reliability while minimizing energy usage and wear on sealing elements.
3Object-affected harmful factors
If packaging speed is reduced to decrease mechanical stresses, then product safety improves, but production output decreases
Solution Approach 1:
The independently controllable carriages enable dynamic speed adjustment throughout the packaging cycle. High speeds can be used for non-critical transport phases, while lower speeds are applied during critical sealing and welding operations, thereby protecting products from excessive mechanical stress while maintaining overall production output.
4Strength
If sealing temperature is increased to improve welding quality, then sealing strength improves, but thermal deformations of sealing elements and surrounding areas increase
Solution Approach 1:
The system controls and optimizes the sealing temperature parameter to achieve adequate sealing strength while minimizing thermal deformations. By using lower temperatures with optimized pressure and time parameters, the machine maintains sealing integrity while reducing thermal stress on sealing elements and surrounding packaging materials.
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
This design reduces mechanical stresses on products, decreases energy consumption, and enhances operational safety and reliability by allowing for slower packaging speed and controlled sealing processes, resulting in increased production efficiency and reduced wear on machinery.
Implementation Method 1
a welding bar (5) arranged on a support located below the counter-folder (4B), which is enslaved to a mechanism controlling its emergence through an opening (51) provided on the counter-folder (4B) and its return below the latter
Data Source
AI summary
Packaging machine for packaging paper rolls, including an operating group forming packages, with an entrance station for the rolls and the packaging sheets, and an output station for the packaged rolls; an elevator; a structure on which the operating group is mounted; a plane on which a folder and a counter-folder are formed for folding the packaging sheets under the rolls; a conveyor for moving the packages being formed above said plane; means for welding the packaging sheets; a welding bar for welding the packaging sheets under the rolls. The welding bar is configured to come out through an opening made on the counter-folder and reposition itself below the latter. The carriages are controlled independently of each other.