Eccentric Shaft Sealing Jaw Alignment for Container Packaging
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Solution Overview
Problem
Existing apparatuses for sealing containers in horizontal movement face issues with wear and maintenance due to guide rods that run through the sealing jaws, limiting alignment and increasing the frequency of part exchanges, and complicating horizontal and longitudinal transport of containers.
Innovation Solution
An apparatus with longitudinally extending sealing jaws mounted on eccentric shafts, driven by servomotors that allow parallel alignment and oscillation, using transversally extending guiding bars with guiding pins and grooves to maintain alignment and reduce wear, and a polymeric bearing for low friction and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If guide rods are used to guide the sealing jaws, then alignment is maintained, but wear increases and maintenance frequency increases
Solution Approach 1:
The patent removes the guide rods from the system entirely. Instead of using guide rods that run through the sealing jaws, the invention uses the oscillating mechanism itself to provide alignment through the guiding bars and pins, eliminating the source of wear and maintenance issues while maintaining parallel alignment of the sealing jaws
Solution Approach 2:
The patent introduces guiding bars with guiding pins as an intermediary mechanism between the oscillating sealing jaws and the frame. These guiding bars provide the necessary alignment and guidance without requiring the sealing jaws to pass through guide rods, thereby reducing wear on the sealing jaws while maintaining precise alignment
2Manufacturing precision
If guide rods run through sealing jaws to maintain alignment, then parallel positioning is achieved, but sealing pattern flexibility is limited
Solution Approach 1:
The patent implements dynamic oscillating movement of the sealing jaws along an arc path, allowing the sealing pattern to vary while maintaining parallel alignment. The sealing jaws can oscillate to create different sealing patterns (e.g., figure-eight patterns) without requiring physical guide rods that would constrain movement, thereby achieving both precision alignment and pattern flexibility
3Manufacturing precision
If guide rods are positioned transversally to sealing jaws, then alignment is provided, but horizontal and longitudinal transport is complicated
Solution Approach 1:
The patent removes the transversally positioned guide rods that obstructed the transport path. By eliminating these guide rods and using alternative alignment methods (guiding bars and pins integrated with the oscillating mechanism), the invention clears the horizontal and longitudinal transport path, allowing containers to move freely without complicated elevating or lowering actions
4Manufacturing precision
If guide rods are used for alignment, then sealing jaw positioning is maintained, but part exchange frequency increases
Solution Approach 1:
The patent eliminates the guide rods that required frequent maintenance and part exchange. By using the oscillating mechanism with integrated guiding bars and pins, the system maintains precise sealing jaw positioning without the wear-prone guide rod components, significantly reducing maintenance frequency and downtime
Solution Approach 2:
The patent uses wear-resistant materials and designs the guiding bars and pins to be durable components that do not require frequent replacement. The sealing jaws themselves are designed to withstand the oscillating motion without wearing down quickly, reducing the frequency of part exchanges while maintaining positioning precision
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 provides a durable and high-resistant alignment system that decreases wear on the sealing jaws, increases productivity, and allows for more flexible sealing patterns without the need for frequent part exchanges or complicated maintenance, while minimizing contamination risks and maintaining parallel alignment.
Implementation Method 1
a polymeric bearing for low friction and durability
Implementation Method 2
a first eccentric shaft rotating around a first rotational axis; a second eccentric shaft rotating around a second rotational axis
Data Source
AI summary
An apparatus for sealing an open end of a package comprises a first longitudinally extending sealing jaw, bearing mounted on a first eccentric shaft rotatable around a first rotational axis, and a second longitudinally extending sealing jaw, bearing mounted on a second eccentric shaft rotatable around a second rotational axis, the second sealing jaw being parallel with the first sealing jaw. At least one motor drives rotation around the first and second rotational axis in opposite directions, wherein the first and the second sealing jaws oppose each other, and are allowed to oscillate between sealing and open positions by moving towards and away from each other. A first and second transversally extending guiding bar cooperate with the first and second eccentric shaft via guiding pins running in guiding grooves, such that transverse play between the first and the second eccentric shaft and the first and second sealing jaw is allowed.