Case study on mold release for molten metal: Solving the stringing issue in battery cases through surface treatment.
We will introduce a coating case that solves the adhesion and stringing of resin that occurs during the welding process of the battery case container and lid.
■Concern In battery production, resin boxes and lids are welded together for sealing. The welding mold is made of aluminum and is heated to over 200°C for use. During this process, molten resin and stringing occur, which was addressed with a fluororesin (PTFE) coating. ■Background of Consultation with Our Company Due to the production of several thousand shots per day at temperatures above 200°C, the coating peels off in about a week. The hassle of changing setups for reprocessing and damage to the mold led to decreased production efficiency, prompting the consultation for improvements in surface treatment. ■Adopted Coating "CHC-1111CR" ■Adoption Background and Effects We proposed a newly developed "CHC-1111CR" that offers the same release properties as fluororesin coatings while maintaining high film hardness even when heated. Testing showed no stringing of the resin or peeling of the coating, allowing for use in tens of thousands of shots and achieving approximately three times the lifespan of conventional coatings. *For details on the coating, please refer to the PDF document.*
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CHC (Ceramic Hard Coat) is a new type of fluoropolymer coating that achieves both non-stick properties equivalent to standard fluoropolymer coatings and high film hardness at elevated temperatures. ■Features - Non-stick properties equivalent to PTFE and PFA - High film hardness at temperatures above 200°C (compared to PTFE) *Based on internal testing ■Applications - Resin welding plates - Resin molding molds - Heater plates *For more details, please download the PDF or contact us.
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To maximize the performance of manufacturing equipment and machine parts, Yoshida SKT derives the "optimal solution" tailored to our customers from hundreds of surface treatment technologies. - Decreased productivity due to adhesive troubles - Instability in product quality due to friction - Early deterioration of equipment due to corrosion We respond to these challenges in the manufacturing field with our extensive track record and reliable technical expertise. In 1963, we began fluoropolymer processing. In 1968, we signed a licensing agreement with DuPont (now Chemours), supporting manufacturing innovations for over 2,000 customers across various industries, from automotive to medical and aerospace. Furthermore, in 2024, we are focusing on the development of next-generation products, such as PFAS-free coatings, contributing to the advancement of sustainable manufacturing. With a three-base system in Nagoya, Tokyo, and Yamaguchi, we flexibly respond to both mass production and custom orders. Our consistent quality management system ensures that we deliver reliable quality. For solving challenges in the manufacturing field, trust the surface treatment experts at Yoshida SKT.
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