The powder coating film is too thick, preventing it from fitting into screw holes and joints. The cause is the way static electricity acts and the amount of powder. This explains how to achieve uniform film thickness.
The powder coating film is too thick, and it doesn't fit into the screw holes or joints. Is the surface uneven like a citrus peel? 【First, please look here】 □ Thick only at the corners and edges → The static electricity is concentrated at the corners. □ Overall thickness with a citrus peel texture → There is too much powder or the application time is too long. □ Tried to coat a recessed area, causing the surrounding area to become thick → Powder is not entering the recess and is only sticking to the front. 【Why does this happen?】 Powder coating adheres to parts through static electricity. If the voltage or amount of powder is too strong, the powder gathers in areas that are easier to coat, resulting in significant differences in film thickness. 【Countermeasures you can implement starting today】 1. Determine the voltage and amount of powder based on the shape of the parts. 2. Measure the film thickness at corners and flat surfaces, and record the differences. 3. Protect screw holes and joints with masking. 【Free materials】 We have compiled the response details for powder coating, including baked coatings, in the related catalog "Baked Coating Services." You can download it for free from this page.
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Defects: Excessive film thickness of powder coating and orange peel texture. Management items: Voltage, powder discharge amount, coating time, film thickness on edges and flat surfaces, masking.
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Designers who design and order powder-coated products, purchasing personnel, and quality assurance personnel who investigate assembly defects.
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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.
