Wrapper Machine Jaw Synchronization for Twist-Free Coil Wrapping
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Solution Overview
Problem
Existing wrapper machines for packaging flexible hoses suffer from unsynchronized movements of holding jaws, leading to twisting of coils, slow operating cycles, high film consumption, and the need for machine stops for angle adjustments.
Innovation Solution
A wrapper machine with synchronized movement of holding jaws driven by a single operating device, using electric motors and gear reducers to control the rotation and position of jaws, allowing for efficient wrapping and reduced film consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If two independent actuating cylinders are used to move holding jaws around the second rotation axis, then the holding jaws can be positioned independently, but the movements cannot be synchronized causing the coil to twist
Solution Approach 1:
The patent merges the control of two independent actuating cylinders into a single synchronized control system. The operating device comprises a single actuating cylinder with a common output rod that simultaneously actuates both holding jaws through a shared linkage mechanism, ensuring synchronized movement around the second rotation axis while maintaining independent positioning capability.
2Ease of operation
If output rods of actuating cylinders move with reciprocating rectilinear motion, then the holding jaws can be actuated, but the operating cycle becomes relatively slow
Solution Approach 1:
The patent transforms the reciprocating rectilinear motion of the output rod into rotational movement of the holding jaws around the second rotation axis. The curved trajectory of the output rod's motion is converted into circular arc movement of the jaws, allowing for faster operating cycles while maintaining precise positioning control.
3Adaptability or versatility
If the angle of rotation of holding jaws is adjusted by changing stroke of output rods, then the holding jaw angle can be modified, but the wrapper machine must stop
Solution Approach 1:
The patent implements a dynamic adjustment mechanism where the angle of rotation of the holding jaws can be modified during operation by adjusting the stroke of the output rod through a variable transmission mechanism. This allows continuous operation without stopping the wrapper machine while maintaining the ability to adapt to different coil sizes and configurations.
4Ease of operation
If two independent actuating cylinders are used, then the holding jaws can be moved around the second rotation axis, but the complete covering of the coil requires a relatively high number of operating cycles consuming more stretch film
Solution Approach 1:
The patent ensures continuous and efficient wrapping by synchronizing the movement of both holding jaws through a single actuating cylinder. This synchronized action allows the wrapper assembly to continuously wrap the stretch film around the coil without requiring multiple separate operating cycles, thereby minimizing stretch film consumption while maintaining complete coverage.
Data Source
AI summary
A wrapper machine has a coiling station for forming a coil of a flexible article with an elongated shape, a packaging station for wrapping a stretch film around the coil, and a transfer unit for transferring the coil from the coiling station to a packaging station, where the coil is wrapped in a stretch film and moved intermittently around a rotation axis by two holding jaws mounted to rotate due to the thrust of respective crank mechanisms connected with an electric motor via an interposed transmission shaft.