PROCESS FOR MANUFACTURING CASING, AND VACUUM PUMP

摘要

The purpose of the present invention is to prevent the damage of a rotor and a side plate employing a simple constitution to thereby prevent the deterioration in durability of a vacuum pump. The following steps are involved: a step of placing a cylinder liner that constitutes a cylinder chamber in a mold, casting using a molten metal for forming a casing main body, and pouring a cylinder liner in an integrated manner (step S2); and a step of penetrating the cylinder liner and the casing main body in an integrated manner to process an air intake hole and an air exhaust hole both of which are communicated with the inside of the cylinder chamber (step S3).