Coating Changing Device Pressure Control
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Solution Overview
Problem
Coating systems face challenges in delivering paint and other liquid materials due to pressure losses and irregular pressure fluctuations in narrow lines, leading to inconsistent material conveyance and residual volumes that are difficult to recover.
Innovation Solution
A changing device with a valve arrangement and delivery pressure device allows for controlled and reproducible delivery pressure, compensating for pressure losses and fluctuations, and enables efficient backflow of media into the reservoir, using a pressure cylinder to support delivery and counteract inherent reservoir pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the feed line has a relatively small diameter to reduce space and material usage, then the pressure loss along the line increases, making it difficult to convey the material solely through the inherent pressure of the connected material source
Solution Approach 1:
A delivery pressure device is introduced as an intermediary component between the material source and the application device. This device actively compensates for pressure losses in the narrow feed line by providing additional pressure support, enabling material conveyance despite the small line diameter.
Solution Approach 2:
The delivery pressure device utilizes pneumatic or hydraulic principles to generate and regulate pressure in the feed line. By controlling the pressure parameters, the system overcomes the inherent pressure losses in narrow lines and maintains sufficient flow to the application device.
2Device complexity
If the inherent pressure in the material sources is used to convey material, then the system is simple, but the irregular pressure fluctuations make it difficult to reproduce the volume conveyed
Solution Approach 1:
The delivery pressure device incorporates pressure sensing and control mechanisms that continuously monitor and adjust the pressure in the feed line. This feedback control compensates for irregular pressure fluctuations from the material source, ensuring consistent and reproducible volume conveyance to the application device.
Solution Approach 2:
The system actively changes and regulates pressure parameters through the delivery pressure device. By dynamically adjusting pressure levels and flow rates, the system maintains precise control over material conveyance volume despite variations in source pressure.
3Quantity of substance
If a large residual volume of medium remains in the line system, then the medium recovery process becomes difficult as the medium must be pushed back against the inherent pressure of the associated ring line
Solution Approach 1:
The delivery pressure device provides counter-pressure support during the medium recovery process. By opposing the inherent pressure of the ring line, it enables efficient pushing back of residual medium into the reservoir, significantly easing the recovery 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
Ensures uniform and reproducible delivery of media to the application device, effectively counteracting pressure losses and fluctuations, and facilitating quick media changes and cleaning processes.
Implementation Method 1
a delivery pressure device, by means of which the inlet pressure, with which a medium is fed into the feed line, can be adjusted and/or supported
Implementation Method 2
the return pressure, with which a medium is fed back from the feed line into the reservoir, can be adjusted and/or can be supported
Implementation Method 3
with the delivery pressure device, a sufficiently high delivery pressure can be built up on the medium, so that possible pressure losses along the delivery route to the application device can also be compensated
Implementation Method 4
the delivery pressure device close to the connection of the changing device can cause or support a medium being delivered back into the reservoir, whereby a relatively high delivery pressure can be built up and the inherent pressure of the associated reservoir can thus be effectively counteracted
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a changing device for media, in particular for varnishes, comprising multiple connections (56), each of which can be connected to a reservoir (54) for a medium. At least one docking unit (58.1, 58.2) is provided, comprising a coupling connection (60.1, 60.2) which is complementary to the connections (56) and can be connected to a supply line (42.1, 42.2) for an applicator (12) of a coating system (10). The docking unit (58.1, 58.2) can be moved relative to the connections (56) by means of a positioning device (62.1, 64.1; 62.2, 64.2). A delivery pressure device (66.1, 66.2) is provided, by means of which the delivery pressure, with which a medium is fed into the supply line (42.1, 42.2), can be adjusted and/or supported, and/or by means of which the return pressure, with which a medium is returned from the supply line into the reservoir, can be adjusted and/or supported. The invention also relates to a coating system with a changing device of this type.