Sand box clamping: high pressure molding press box has the following three ways: 1) the weight method This method is more common, Qingzhou sand box, but more trouble. 2) the weight of the sand box method This method is most convenient, sand box sales, but firm sand box, sand box price, but more cumbersome sand box. 3) box card method usually used handcrafted box card. When the automatic box card box card bodies shall be provided on the sand box. According to statistics given priority sand casting, sand box manufacturer, country or internationally, in all casting production in the 60 to 70% sand casting is produced, and in which about 70% is clay sand production. The main reason is casting sand casting method than other low-cost, simple production process, short production cycle. So like a car engine cylinder block, cylinder head, crankshaft, etc. are used green sand casting process of production. When the wet type can not meet the requirements to consider the use of clay sand is dry sand, dry sand or other sand. Green sand casting casting weight from a few kilograms up to several tens of kilograms, while dry clay can produce castings weighing dozens of tons. Sand box production, Dragon Industrial (certified), Qingzhou sand box provided by the Industrial Development Co., Ltd. Shandong dragon. Shandong dragon Development Co., Ltd. (www.julongshiye.com/) Shandong Weifang, machining leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Industry leaders at the dragon with the staff warmly welcome all inquiries negotiations to create a better future dragon Industry.