Control is a big challenge for all surface coating
Incorrect film thickness at the quality of the final product unsuitable, inappropriate, video, or other characteristics. Scrap reduced yields, without the expensive coating material and environmental costs associated with production losses. Periodic manual control of the viscosity increases labor costs and taking into account the variance of the operator. And plant performance, changes in temperature, the coating material blending options and the process of evaporation is often driven by off-line measurements are impractical. viscosity coating
A typical coating system include: the supply of base stock and a liquid, the mixture agitated tank, pump, heater, filter, power line, the applicator, the applicator itself, and return mixture of reservoir. Applicator can be used for a dip, roll, spray, sputter, or other processes. To accurately and reliably control the coating viscosity, viscosity at Cambridge recommends best practices.
First Use of closed-loop control. Find a viscosity sensor, so it is a substance that is actually applicable for measuring the final product. The best place in the supply line of the applicator. Sensor information should be fed directly to electronics, which controls without make-up liquid or solvent. The integrated PID controller provides excellent performance. A separate gauge of basic shares without filling system.
The second Temperature-compensated viscosity is very important. Temperature has a significant effect on viscosity, but not necessarily the surface concentration. Unfortunately, the production of the ambient temperature is often not well controlled. Viscosity and thus free hard just to be fair, regardless of temperature. Coating has to repeat the temperature-viscosity relationship that can be easily modeled mathematically, and can be directly programmed electronic temperature compensation for accurate viscosity viscosity control regardless of temperature changes.
The third Offline measurements are important, but must be strictly controlled. Off-line measurements are often coater control viscosity standard. Unfortunately, they are significant errors from different sources. These off-line measurements may be within a production environment, mugs and more sophisticated laboratory equipment. It is important that:
a) The sample consists of a coating, which is typical, that is.
b) must be done often enough options.
c) the shear line of the conditions to be duplicated in the laboratory.
d) sampled and measured, for example, that no off-gassing coating is allowed.
e) All tests must be handled consistently deny the inherent variability of the operator.
4) Automated line viscosity control eliminates errors. Sampling and laboratory methods for diversity is best controlled through an automated line measurement and control. The sensor can be arranged in such a way that measures coating liquid, which is representative of the fluid is applied. Solvent or liquid makeup can be automatically added to the control of a magnetic fluid coating consistency. Most of the liquid fluid is pumped and piped fluid shear most of the controls. Achieve a consistent shear sensor is mounted in the supply line applicator. In this way, the operator-induced errors in the least accurate and repeatable results.
5) small-sized sensors that are suitable for hazardous area installation and maintenance easier. Compact sensor, it is easier to install and maintain. If the sample conditioning is necessary, small sensors require smaller amounts of fluid therapy. Self-cleaning/low surveillance sensors are available online or tank configurations.
Of Cambridge Viscosity
Cambridge Viscosity is a leading provider of viscometers covering the entire world. Cambridge laboratory and process viscometers use the same basic technology, and is fully compliant with ASTM D7483. Cambridge are compact, require a small amount of sample to include temperature sensors and is very accurate, reproducible and robust. Sensors using the easy to maintain and operate the piston oscillation technology to include best practices and is fully proven as a reliable performance coating inspection devices. Cambridge provides a world-wide application of technical support and services anywhere and, if necessary.