Suction Member Array for Sheet Holding in Processing Machines
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Solution Overview
Problem
Existing holding devices for flat sheets in processing machines are ineffective in maintaining sheet flatness and braking throughout the transfer, especially in the upstream portion, due to their monolithic structure and air cushion creation, which disrupts the holding function.
Innovation Solution
A holding device with two series of suction members, each series transversely offset and capable of moving parallel to the sheet conveying path, allowing for variable geometry and air removal, ensuring continuous braking and support along the entire conveying path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a monolithic vacuum chamber is used as a holding device, then the sheet can be supported and braked, but the device becomes inactive in upstream portions and creates air cushion effects that disrupt holding
Solution Approach 1:
The vacuum chamber is divided into multiple independent suction modules arranged along the conveying path. Each module can independently generate suction force, allowing the system to maintain effective holding across the entire path length without creating disruptive air cushions, as each module interacts with the sheet locally rather than as a single large chamber
Solution Approach 2:
The suction modules are mounted on movable supports that allow them to translate along guides in the longitudinal direction. This dynamic positioning capability enables the modules to adapt their location along the conveying path, maintaining optimal coverage and holding effectiveness regardless of sheet format or position
2Manufacturing precision
If the vacuum chamber is moved to the downstream portion to match sheet immobilization location, then holding position is optimized, but the device cannot perform holding function in upstream portions
Solution Approach 1:
Multiple suction modules are distributed along the conveying path, with each module capable of independently providing holding function. This universal coverage allows any module to serve as the primary holding point while others provide supplementary support, ensuring both precise holding position and continuous coverage throughout the path
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 device effectively maintains sheet flatness and firm holding throughout the transfer by preventing air cushion effects and adapting to varying sheet formats, ensuring consistent braking and support from upstream to downstream.
Implementation Method 1
a holding device (1) comprising two series of suction members (10, 20) each of which is made up of several suction members (11, 21) placed side by side
Data Source
AI summary
A holding device (1) for a succession of sheet-shaped elements circulating in a processing machine (100) along conveying path T. The holding device (1) has two series (10, 20) of a plurality of suction members (11, 21). At least one series of suction members 20 extends along and is movably mounted parallel to the transport path T of the sheets, between a retracted position and a deployed position. Each series is in an array, parallel to the transport path and the suction members are arranged spaced apart alongside one another, so that the array of members extend perpendicular to the conveying path T of the sheets and the suction members (11, 21) of each series (10, 20) are transversely offset relative to the suction members (11, 21) of the other series (10, 20).