Takahashi J, Zhang J Z, Okazaki M
Department of Dental Technology, Osaka University Faculty of Dentistry, Japan.
Dent Mater J. 1993 Dec;12(2):245-52. doi: 10.4012/dmj.12.245.
Two types of patterns were tested for castability: 1) polyester mesh pattern (20mm x 22mm with 100 open squares) and 2) 20mm x 20mm wax plates 1.0 and 1.5 mm in thickness. These materials were invested using a pre-arranged commercial phosphate-bonded investment for titanium. Three different types of casting machines were selected: 1) a pressure-type casting machine with separate melting and casting chambers, 2) a pressure-type casting machine with one chamber and 3) a centrifugal-type casting machine at 3000 rpm. Pure titanium (> 99.5%) was cast into the molds at a mold temperature of 100 degrees C. The castability of mesh pattern was evaluated in terms of the number of cast segment, and the cast plate was evaluated using X-ray transparent images by a digital imaging technique. The centrifugal casting method showed the best castability among these three casting methods.
1）聚酯网型（20毫米×22毫米，有100个开口方格）和2）厚度为1.0毫米和1.5毫米的20毫米×20毫米蜡板。使用预先安排的用于钛的商业磷酸盐粘结包埋材料对这些材料进行包埋。选择了三种不同类型的铸造机：1）具有单独熔化和铸造腔室的压力式铸造机，2）单腔压力式铸造机，3）转速为3000转/分钟的离心式铸造机。将纯钛（>99.5%）在模具温度为100摄氏度的情况下铸入模具。根据铸造段的数量评估网型的铸造性能，并通过数字成像技术使用X射线透明图像评估铸板。在这三种铸造方法中，离心铸造法显示出最佳的铸造性能。
