陶管具有耐酸防腐,经久耐用,价格低廉等优点,因而广泛用于城市建设,污水输送,农田排灌,地面渗水等工程。全国每年需用量在100万吨左右。随着四化建设和化学工业的发展,今后的需用量还会增加。现在全国各地生产陶管的工厂很多,但所用成型设备——挤管机,主要是螺旋挤压式及双辊挤压式两种,由于后者构造简单,目前在许多中小厂里仍普遍使用着,辊压式 Ceramic pipe has the advantages of acid and corrosion resistance, durability, low cost, etc. Therefore, it is widely used in urban construction, sewage transportation, farmland irrigation and drainage, surface water seepage and other projects. The country needs to use about 1 million tons every year. With the development of the four modernizations and the development of the chemical industry, the demand for the future will increase. There are many factories producing pottery pipes all over the country, but the molding equipment used for the pipe extrusion machine is mainly spiral extrusion type and double roller extrusion type. Because the latter has a simple structure, it is still commonly used in many small and medium-sized factories. With roller type