Quartz sand is melted and shaped by the heat released by the electrode arc. The quartz sand is evenly spread on the inner wall of the molding die with a molding rod, and the quartz sand is melted and molded by the heat released by the arc starting of the electrode. After molding, the mold is taken out and cooled, and after cooling, the finished product is formed through subsequent processing. Sand scraper is also called slag scraper.