Rolling Contact Sealing Device for Packaging Machines
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Solution Overview
Problem
Traditional sealing devices in packaging machines produce poor-quality, mechanically weak seals due to frictional forces from sliding contacts, requiring frequent maintenance and leading to low production efficiency and aesthetic issues.
Innovation Solution
A sealing device with rolling cylindrical elements that reduce frictional forces by using a rolling contact instead of sliding, incorporating heating and cooling elements, temperature sensors, and a compact design with presser elements for adjustable sealing pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If sliding contact sealing is used, then the sealing device can be simple in structure, but the sealing quality is poor and mechanically weak
Solution Approach 1:
The patent replaces the traditional sliding contact mechanical system with a rolling contact system using cylindrical elements. This substitution reduces frictional forces significantly while maintaining the sealing function, thereby improving sealing quality and mechanical strength without substantially increasing device complexity
Solution Approach 2:
The patent changes the contact mode parameter from sliding to rolling, which fundamentally alters the friction characteristics. This parameter change transforms the harmful frictional forces into minimal rolling resistance, directly improving sealing strength while keeping the device structure relatively simple
2Device complexity
If sliding contact sealing is used, then the device structure is simple, but maintenance frequency increases
Solution Approach 1:
By substituting sliding contact with rolling contact using cylindrical elements, the patent dramatically reduces wear and friction. This extends the operational life of the sealing components and reduces the frequency of maintenance interventions, making the device more reliable despite the slightly more complex structure
Solution Approach 2:
The rolling cylindrical elements are designed to self-lubricate through their motion and material properties, reducing the need for external lubrication and maintenance. The design allows the sealing mechanism to service itself to some extent, reducing maintenance frequency
3Device complexity
If sliding contact sealing is used, then the sealing device is simple, but production efficiency decreases
Solution Approach 1:
The replacement of sliding contact with rolling contact reduces frictional resistance and energy loss. This improves the efficiency of the sealing operation, allowing faster sealing cycles and higher production throughput, justifying the increased device complexity
Solution Approach 2:
The rolling contact mechanism enables smoother and more continuous sealing action compared to sliding contact. This reduces interruptions and maintains higher operational speed, thereby improving production efficiency despite the more complex device structure
4Device complexity
If sliding contact sealing is used, then the device structure is simple, but aesthetic quality deteriorates
Solution Approach 1:
The rolling contact system produces cleaner seals with fewer defects compared to sliding contact. The reduced friction and more uniform pressure distribution result in aesthetically superior packaging, justifying the increased device complexity
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 achieves high-quality, mechanically resistant seals with reduced maintenance needs, increased production efficiency, and improved aesthetics, ensuring reliable operation over millions of cycles.
Implementation Method 1
the aforesaid sealing elements comprise rolling bodies, in particular substantially cylindrical, rotatably connected to the containment body and configured to be placed in contact with at least two edges of a film to be sealed, in such a way as to achieve a rolling type contact between the aforesaid rolling bodies and the edges of film to be sealed
Implementation Method 2
heating and/or cooling elements associated with the sealing elements and detection and control elements, such as for example a temperature sensor, which are arranged to measure a temperature at the sealing elements
Implementation Method 3
heating and/or cooling elements associated with the sealing elements and detection and control elements, such as for example a temperature sensor, which are arranged to measure a temperature at the sealing elements
Data Source
AI summary
A sealing device for a packaging machine comprises a containment body extending prevalently along a first axis, between a first end and a second end, and defines a housing volume in which at least one heating element is housable. Sealing elements are mechanically associated with the containment body and configured to seal together edges of a film for packaging that are arranged adjacent to or overlapping one another. The sealing elements comprise a plurality of rolling elements configured to be placed in contact with at least one of the edges to achieve a sealing by a rolling contact.