Insufficient degreasing leads to poor adhesion. Explaining the importance of often-overlooked processes.
In the painting of home appliance housings, the adhesion of the paint film is extremely important to ensure product quality and durability. Particularly in the case of aluminum die-cast materials, poor adhesion due to the presence of release agents or machining oils can easily lead to paint film peeling, which can not only result in poor product appearance but also potentially lead to functional degradation. Even trace amounts of oil that cannot be visually confirmed can affect adhesion after painting and may manifest as defects over time. Additionally, insufficient degreasing can lead to the occurrence of blisters and pinholes, potentially causing defects during the curing process. When the degreasing process is shortened to improve productivity, it is not uncommon for the costs of re-coating or handling complaints to increase as a result. As the first step in addressing poor adhesion, standardization of the degreasing process and a review of management conditions are required. 【Application Scenarios】 - Painting of aluminum die-cast home appliance housings - Products where appearance quality is emphasized - Products requiring long-term durability 【Benefits of Implementation】 - Reduction of peeling defects due to improved paint film adhesion - Suppression of blister and pinhole occurrence - Reduction of re-coating and complaint handling costs - Stabilization of product quality and improvement of reliability
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【Features】 - Explanation of the causes and countermeasures for poor adhesion due to insufficient degreasing - Description of the effects of oil that cannot be confirmed visually - Presentation of the factors leading to blistering and pinhole formation - Explanation of the importance of standardizing the degreasing process and reviewing management conditions - Provision of materials summarizing defect cases and improvement points 【Our Strengths】 Eiwa Kogei has been dedicated to metal surface treatment since its founding in 1958, providing one-stop solutions from pre-treatment to painting, stripping, and delivery. By in-house production of zinc phosphate treatment, we complete degreasing, chemical treatment, painting, inspection, and packaging internally, consolidating management into a single point of contact. By consolidating processes that were previously spread across multiple vendors, including paint stripping and cleaning by group companies, we contribute to shorter delivery times and cost reductions. Even in the event of painting defects, we can utilize our in-house stripping equipment to rework 5,000 pieces within three days. We also have the capability to handle a monthly production of 300,000 pieces with 100 varieties in 30 colors, meeting the diverse needs of our customers. If you bring in a sample or drawing, we can provide a rough estimate on the same day.
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De-fatting process improvement, defect reduction.
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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.
