The surface of the received painted item is sticky and sticks together when stacked. The cause is insufficient baking temperature or time. Here is a simple confirmation method that can be done upon receipt.
When touching the received painted parts, the surface feels slightly sticky. When stacked, the parts stuck to each other. 【Checks to Perform Upon Receipt】 □ Pressing with a fingernail leaves a mark → The paint film has not fully cured □ Rubbing with a cloth soaked in thinner transfers color → The baking temperature or time was insufficient □ Only the thick parts are sticky → The baking process finished before the parts were fully heated 【Why This Happens】 Baked paint only hardens at the specified temperature and time. Even if the oven settings are correct, it will not cure if the temperature of the parts has not increased. 【Countermeasures to Implement Starting Today】 1. Request records of baking temperature and time from the subcontractor 2. Perform rub checks randomly upon receipt 3. For thick parts, have separate baking conditions established 【Free Resource】 The management standards for baking conditions are compiled in the related catalog "Eiwa Kogei_Paint Quality Control Guidelines_Process Management Standards." This can be downloaded for free from this page.
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basic information
Defect type: Poor hardening (stickiness). Verification method: Press with a nail, rub with a cloth soaked in thinner. Management items: Curing temperature and time, thickness of the parts.
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Applications/Examples of results
Acceptance inspection of painted products, confirmation of processes at subcontractors, handling complaints regarding curing defects. Materials for training new sales representatives and quality assurance personnel.
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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.
