Refractory metal core wall thickness control

According to the invention claims casting system mainly comprising a core and a wax mould according and the core is separated by; a groove the first end of the core and wax mould with the second end of the contact can, so the patient core to the wax die locating refractory metal mould core; moreover the refractory metal mould core is used to the spring and when the closed wax mould mechanism and capable of the wax mould mechanical caging the core at least a device on mechanism.