Tetrahedral Pouch Conversion Device for Rotary Packaging
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Solution Overview
Problem
Conventional rotary packaging machines are unable to produce tetrahedral pouches where the upper and lower sealed ends cross perpendicularly without modifying their construction, limiting their ability to efficiently convert flat pouches into tetrahedral shapes.
Innovation Solution
A device is integrated into a conventional rotary packaging machine, featuring a pouch clamping unit with movable blades and actuating pins that clamp and rotate the pouch, allowing for efficient conversion of flat pouches into tetrahedral pouches without altering the machine's construction, and includes a gripper opening unit to maintain gripper jaws in a released state, reducing processing time and preventing pouch breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional rotary packaging machine is used without modification, then the machine construction remains simple and cost-effective, but the machine cannot produce tetrahedral pouches with perpendicular upper and lower sealed ends
Solution Approach 1:
The pouch clamping unit is designed to perform multiple functions: it clamps the pouch during rotation, opens the pouch mouth, and maintains gripper release state. This multi-functional design allows a conventional rotary packaging machine to produce tetrahedral pouches without requiring fundamental construction changes, thereby improving adaptability while limiting complexity increase
2Productivity
If the grippers maintain clamping state throughout the process, then the pouch is securely held, but the processing time increases and productivity decreases
Solution Approach 1:
The pouch clamping unit periodically clamps and releases the pouch during the rotation process. The grippers clamp the pouch initially, then the pouch clamping unit takes over to maintain clamping while the grippers release. This periodic transfer of clamping responsibility reduces processing time and increases productivity while maintaining pouch holding stability through coordinated action
3Productivity
If the pouch is rotated and processed continuously, then productivity increases, but the pouch may break due to excessive handling
Solution Approach 1:
The pouch clamping unit acts as an intermediary between the grippers and the pouch during rotation. It takes over clamping from the grippers, allowing the grippers to release without causing pouch damage. This intermediary clamping mechanism enables continuous rotation and processing while preventing pouch breakage through smooth transfer of handling responsibility
4Adaptability or versatility
If a dedicated device for forming tetrahedral pouches is added, then the ability to produce tetrahedral pouches is achieved, but the machine construction must be changed
Solution Approach 1:
The pouch clamping unit is designed as a multi-functional component that can be integrated into conventional rotary packaging machines. It performs pouch clamping, mouth opening, and gripper release functions, enabling tetrahedral pouch production without requiring fundamental construction changes to the machine, thus improving ease of manufacture while achieving adaptability
Solution Approach 2:
The pouch clamping unit incorporates movable blades and actuating pins that dynamically adjust during operation. The movable blades open the pouch mouth while the actuating pins control the clamping force and timing. This dynamic design allows the unit to adapt to the pouch processing requirements without requiring fixed, complex machine modifications
Data Source
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AI summary
A device for converting a flat pouch into a tetrahedral pouch in a rotary packaging machine including: grippers having gripper jaws and gripper rollers; a rotary shaft; and a barrel cam combined with the rotary shaft and reciprocating for a duration as long as one process of the grippers, with a cam portion provided on an upper part of the barrel cam to control the space between the gripper jaws; the device including: an arm unit combined with the rotary shaft and performing repeated reciprocation for a duration as long as one process of the rotary packaging machine; a rotary unit mounted to the arm unit; and a pouch clamping unit combined with the rotary unit to be rotated by the rotary unit, the pouch clamping unit clamping opposite sides of the mouth of the pouch while opening the mouth of the pouch inside the pouch.