Adjustable Star Mechanism for Rotary Packaging Machines
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Solution Overview
Problem
Rotary packaging machines require frequent adjustments to accommodate containers of different diameters, necessitating the modification of star cavities and guide positions, which is time-consuming and disrupts the filling process.
Innovation Solution
A star mechanism with movable arms and an adjustment system that allows for easy adaptation to various container diameters without the need for a guide, featuring a cam-driven actuation mechanism, adjustable arm positions, and a locking mechanism to secure the arms in place, ensuring consistent container support across a range of diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the dimensions of star cavities and guide position are modified to accommodate different container diameters, then the machine can handle various container sizes, but the adjustment process is time-consuming and requires stopping the filling machine
Solution Approach 1:
The patent applies the dynamics principle by making the star cavity dimensions adjustable during operation. The star mechanism includes movable arms that can change the cavity dimensions dynamically, allowing the machine to adapt to different container diameters without stopping the filling process. This transforms a static structure into a dynamic one that can respond to varying container sizes in real-time.
Solution Approach 2:
The patent implements parameter changes by allowing the physical dimensions of the star cavities to be modified. The adjustment mechanism changes the geometric parameters of the cavities (width, depth, shape) to match different container diameters. This enables the same star mechanism to accommodate a range of container sizes by altering its structural parameters on-the-fly.
2Adaptability or versatility
If the guide position is adjusted for different container diameters, then proper container positioning is achieved, but the complexity of the adjustment mechanism increases
Solution Approach 1:
The patent applies universality by designing a single adjustable star mechanism that performs multiple functions: it guides containers, supports different diameters, and maintains positioning accuracy. The same movable arms that adjust cavity dimensions also serve as the guiding structure, eliminating the need for separate guide adjustment mechanisms and reducing overall system complexity.
Solution Approach 2:
The patent merges the guide function with the star cavity structure itself. Instead of having separate guide components that need independent adjustment, the guide functionality is integrated into the movable arms of the star mechanism. This consolidation reduces the number of separate adjustment mechanisms needed and simplifies the overall system.
3Ease of manufacture
If fixed star cavity dimensions are used, then the structure is simple and robust, but the machine cannot accommodate containers of different diameters
Solution Approach 1:
The patent transforms the static star structure into a dynamic one with movable arms that can adjust cavity dimensions. This maintains the fundamental simplicity of the star mechanism while adding the capability to adapt to different container sizes. The basic star geometry remains simple, but with the added dimension of adjustability.
Solution Approach 2:
The patent segments the star cavity into multiple adjustable components (movable arms) that can be independently positioned. This segmentation allows each arm to be adjusted to accommodate different container diameters while maintaining the overall simple star structure. The modular nature of the segmented arms makes adjustment easier while preserving structural integrity.
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
Enables quick and efficient adaptation to containers of different diameters, reducing downtime and maintaining consistent container handling without the need for guide adjustments, thus enhancing the operational efficiency of rotary packaging machines.
Implementation Method 1
an actuation mechanism with a movable activation pin between a first extreme position and a second extreme position, where in the first extreme position, the actuation mechanism positions the arms of said pair of arms in the open position and where in the second extreme position, the actuation mechanism positions the arms of said pair of arms in the closed position, and a cam fixed relative to the moving assembly and with a guide surface where the shape of the guide surface is such that each activation pin follows the guide surface to move successively from the first extreme position to the second extreme position and vice versa
Implementation Method 2
a locking mechanism that locks the position of the vertical axis of rotation of each arm between the first and second positions
Data Source
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AI summary
The invention relates to a star (100) for a rotary packaging machine which includes a vertical shaft, a moving assembly (204) with a frame (106) fixed to said shaft, several pairs of arms (102a-d), each arm (104a-b) is articulated on the frame (106) around an axis of rotation, for each pair of arms (102a-d), an actuation mechanism which moves the arms (104a-b) between an open position and a closed position, an adjustment mechanism which moves the axis of rotation of each arm (104a-b) between two positions and a locking mechanism which locks the position of the axis of rotation, and a fixed cam.