Is the "dripping" in painting the worker's fault? Traps caused by the environment and viscosity.
The issue of paint defects cannot be resolved solely by how to operate the spray gun. We delve into the close relationship between temperature and thinner dilution ratio.
[Cause of Occurrence] "Dripping" defects are often seen in parts with vertical surfaces or complex shapes. Production managers on-site tend to blame "individual skill" factors, such as the operator's spray gun speed being too slow or the application amount being too high. [Truth] More than half of the causes of dripping are due to the mismatch between "paint viscosity" and "ambient temperature," rather than the operator's skill. Particularly during seasonal transitions, if painting is done at the same dilution ratio (excessive thinner) as in summer while the temperature is dropping, the paint becomes too runny and quickly drips off. [Improvement Measures] It is important to establish rules for selecting thinners (fast-drying or slow-drying) according to temperature and for strict time management using dedicated viscosity cups. A quick reference chart summarizing appropriate viscosity and dilution ratios for each season can be downloaded from this link and posted on-site. [Summary] Dripping in painting can be eradicated not by relying on individual skill but by quantifying paint viscosity management in accordance with temperature changes. Eiwa Kogei Co., Ltd. achieves a uniform and beautiful finish even on complex-shaped parts through thorough paint management.
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basic information
Paint viscosity management: 20 seconds (Ford cup) / Curing temperature: 160-180 degrees / Seasonal viscosity automatic adjustment / Complex shape compatibility / Drip occurrence rate below 2 percent
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Applications/Examples of results
Complex-shaped parts, automotive parts, architectural hardware
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Company information
We are not just a "subcontracted painting factory." Established in 1958, our company has a foundation of painting technology and also specializes in chemical treatment, stripping, and cleaning, functioning as the "external surface treatment department" in your organizational chart. Based on our philosophy of "preparation is eight-tenths of the work," we emphasize participation from the "upstream process" before the drawings are finalized. We conduct test painting on a wide range of metals and difficult materials, and we produce the entire process from assembly, packaging, to delivery, thereby reducing your management workload. Additionally, by being able to perform zinc phosphate treatment in-house, we achieve stable painting quality. Furthermore, our micro-heating stripping technology, which does not use chemicals, maintains the electrical state of the "jigs (hangers)" that influence painting quality. Our approach of "pre-treatment determines painting quality" ensures the stability of the paint film during mass production. Rather than simply "applying specified standards," we work backwards to achieve optimal painting specifications and prevent scratches during transportation, sparing no effort in thorough discussions from the outset. This diligent preparation is the shortest path to preventing rework and minimizing total costs. From the development stage, please utilize the expertise of our specialists as part of your production line.
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