Rotary Vacuum Manifold Segmentation for Suction Leakage
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Solution Overview
Problem
Conventional rotary transfer devices for packaging machines face challenges in reliably picking up, transferring, and placing articles of varying shapes and dimensions due to suction cup leakage and internal vacuum pressure loss, especially with flexible packaging materials, leading to incomplete engagement and malfunction.
Innovation Solution
An article-handling device with a vacuum system that includes a stationary support shaft, rotatably mounted vacuum manifolds, and a control valve to independently distribute vacuum pressure to tubular suction shafts, ensuring continuous suction and preventing air leakage, with a monolithic vacuum conduit for separate operational connectivity and enhanced structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If suction cups are used to pick up and transfer packaged articles, then the device can handle various shapes and dimensions, but air leakage occurs with textured or irregular surfaces causing loss of vacuum pressure
Solution Approach 1:
The vacuum system is divided into multiple independent vacuum chambers, each with its own suction cups. This segmentation allows individual chambers to be isolated from each other, so that air leakage in one chamber does not affect the vacuum pressure in other chambers, thereby maintaining reliable operation across multiple pickup points.
Solution Approach 2:
The suction cups are designed with flexible materials and adjustable positioning mechanisms that allow them to adapt to local surface variations of packaged articles. This local adaptation ensures adequate surface contact and vacuum sealing even with textured or irregular surfaces, preventing air leakage at the interface between suction cup and package.
2Device complexity
If a single vacuum system is used for multiple suction cups, then the structure is simplified, but loss of vacuum pressure in one suction cup affects the entire system
Solution Approach 1:
The vacuum system is segmented into multiple independent vacuum chambers, each maintaining its own vacuum pressure. This is achieved through separate vacuum sources or isolated chambers with individual vacuum control, ensuring that a leak in one chamber does not compromise the vacuum pressure in other chambers, thereby improving system reliability.
3Productivity
If rotary transfer devices operate at high speed, then productivity increases, but internal structural damage occurs due to metal fatigue
Solution Approach 1:
The vacuum system components are constructed using composite materials and alternative joining methods that replace traditional metallic solder joints. This includes using vibration-welded or ultrasonic-welded plastic components that are more resistant to fatigue and stress, allowing the device to operate at high speeds without the metal fatigue problems that limit productivity.
4Weight of moving object
If suction cups are made lightweight and pliable, then they can conform to article surfaces, but gaps allow ambient atmosphere to leak in
Solution Approach 1:
The suction cups utilize materials with optimized viscoelastic properties that allow them to deform and conform to the contours of packaged article surfaces. This parameter optimization enables the lightweight, pliable design to maintain effective sealing contact, preventing air leakage while keeping the suction cups light enough for high-speed operation.
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 ensures reliable and robust article handling by maintaining vacuum pressure across suction shafts, preventing malfunctions during transfer, even with irregularly shaped products, and enhancing structural integrity to withstand repetitive motion.
Implementation Method 1
suction cups are designed such that the internal pressure or inside the suction cup can be lowered by evacuation, and thus, create the negative pressure or lifting force (suction) needed to secure it to the object to be handled
Implementation Method 2
Loss of suction can be caused by incomplete surface contact between an individual suction cup and the article to be transferred. In general, suction cups are designed such that the internal pressure or inside the suction cup can be lowered by evacuation, and thus, create the negative pressure or lifting force (suction) needed to secure it to the object to be handled
Data Source
AI summary
A article-handling device includes a means of rotation, a vacuum conduit, and a first vacuum manifold, each rotatably mounted onto a stationary support shaft. The device further includes a second vacuum manifold affixed to the first vacuum manifold and a non-rotatable control valve which is operational synchronized with the rotation means to provide both vacuum pressure and atmospheric pressure independently to each of the first and second vacuum manifolds. Each of the vacuum manifolds comprises one or more tubular suction shafts each having a suction cup affixed thereto. The suction shafts of each vacuum manifold are spatially arranged such that at least a first suction shaft of the first vacuum manifold is substantially parallel to a first suction shaft of the second vacuum manifold thereby enabling the suction shafts to function as a paired unit. In this way, at least the first suction shaft of said first vacuum manifold and the first suction shaft of said second vacuum manifold are each independently adapted to attract and hold said article when the first and second vacuum manifolds are operationally connected with said vacuum pressure and release said article when the first and second vacuum manifolds are operationally connected with said atmosphere pressure.