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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.*
basic information
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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