A serial multi-cavity high pressure casting apparatus includes a three stage mold comprising a fixed mold, an operation mold, and a medium mold disposed between the fixed mold and the operation mold, a main sleeve penetrating a lower portion of the fixed mold, and having molten metal injected thereinto, a main runner formed to extend upward from the main sleeve, an auxiliary sleeve branched to both directions from the main runner, an auxiliary runner formed to extend upward from each of both ends of the auxiliary sleeve and connected to each of a first cavity formed between the fixed mold and the medium mold, and a second cavity formed between the medium mold and the operation mold, and a sleeve core disposed on a lower portion of the medium mold, and having the main sleeve, the main runner, and the auxiliary sleeve inserted thereinto.

A serial multi-cavity high pressure casting apparatus includes a three stage mold comprising a fixed mold, an operation mold, and a medium mold disposed between the fixed mold and the operation mold, a main sleeve penetrating a lower portion of the fixed mold, and having molten metal injected thereinto, a main runner formed to extend upward from the main sleeve, an auxiliary sleeve branched to both directions from the main runner, an auxiliary runner formed to extend upward from each of both ends of the auxiliary sleeve and connected to each of a first cavity formed between the fixed mold and the medium mold, and a second cavity formed between the medium mold and the operation mold, and a sleeve core disposed on a lower portion of the medium mold, and having the main sleeve, the main runner, and the auxiliary sleeve inserted thereinto.

The present invention enables confirmation that a mold magnetically adhered by a magnetic clamping device has been magnetically adhered by a sufficient adhesion force so as not to be pulled off from the magnetic clamping device by a mold opening force of a mold handling device. A controller 7 carries out magnetization of a magnetic clamping device 10 such that a magnetic adhesion force weaker than that in normal magnetization is generated in a state where molds M1, M2 are bound together, and carries out a test to determine whether separation of the molds M1, M2 would occur when platens 2, 3 are separated. The controller issues a warning regarding lack of guaranteed adhesion force to an operator when separation is detected, and carries out normal magnetization of the magnetic clamping device 10 when separation is not detected.

A movable platen according to the present invention includes: a mold clamping platen 42 having a projecting portion 62 in a mold closing direction-side surface; a mold mounting platen 44 mounted to the projecting portion 62 of the mold clamping paten 42; and a guide mechanism 50 fixed to the mold clamping paten 42 and supporting the mold mounting platen 44. Only the mold clamping paten 42 is fixed to the guide mechanism 50, while the mold mounting platen 44 is not fixed but placed on platen surface support portions 52.

A movable platen according to the present invention includes: a mold clamping platen 42 having a projecting portion 62 in a mold closing direction-side surface; a mold mounting platen 44 mounted to the projecting portion 62 of the mold clamping paten 42; and a guide mechanism 50 fixed to the mold clamping paten 42 and supporting the mold mounting platen 44. Only the mold clamping paten 42 is fixed to the guide mechanism 50, while the mold mounting platen 44 is not fixed but placed on platen surface support portions 52.

A new method for providing stepped radial cooling channels for use in investment casting process, particularly for producing gas turbine blades or vanes, is disclosed. The process involves selecting the cores with two different diameters, smaller diameter cores for airfoil channels and larger diameter cores for root channels. The airfoil cores are bended via especial fixture due to angular design of airfoil relative to root of blade. Then the airfoil cores are inserted into the root cores whereas bended segment of airfoil cores are completely located and locked into the root cores without any requirement to glue or cement at their junction or welding the junction. Then the pairs of cores are placed in the injection wax mold having a cavity with a shape complementary to the final casting design and plurality of grooves therein. Each groove of the mold has a depth equal to a radius of certain number of ceramic cores which correspond to cooling channels of casting. Then the wax is injected for temporary positioning of the cores. The wax blade and located cores therein form a pattern for investment casting.

A new method for providing stepped radial cooling channels for use in investment casting process, particularly for producing gas turbine blades or vanes, is disclosed. The process involves selecting the cores with two different diameters, smaller diameter cores for airfoil channels and larger diameter cores for root channels. The airfoil cores are bended via especial fixture due to angular design of airfoil relative to root of blade. Then the airfoil cores are inserted into the root cores whereas bended segment of airfoil cores are completely located and locked into the root cores without any requirement to glue or cement at their junction or welding the junction. Then the pairs of cores are placed in the injection wax mold having a cavity with a shape complementary to the final casting design and plurality of grooves therein. Each groove of the mold has a depth equal to a radius of certain number of ceramic cores which correspond to cooling channels of casting. Then the wax is injected for temporary positioning of the cores. The wax blade and located cores therein form a pattern for investment casting.

A housing, a housing manufacturing method, and a mobile terminal. The housing comprises a metal body, and a connecting body; the metal body at least comprises a first body, and a second body; the connecting body at least comprises a first connecting body. The first body and the second body are connected by means of the first connecting body. A plurality of mating structures are formed at the joint of the first body, the second body and the first connecting body. Each mating structure comprise at least one of a groove tension structure, a protrusion tension structure, a rib tension structure, a through-hole fastening structure, a hole-site knurling rib structure and an inner-hole groove structure. Structural stability of the joint of the housing can be effectively enhanced by means of the described manners.

A gap control part controls a clamping device so that mating surfaces in a die face each other across a gap, and thereby a cavity and an external part of the die communicate across the gap. A molten metal feed control part controls a molten metal feed device so as to feed molten metal into a sleeve when the gap is being maintained. An injection control part controls an injection device so as to start a forward movement of a plunger at a time when the gap is maintained and there is the molten metal in the sleeve. A clamping control part controls a clamping device so as to make the mating surfaces abut against each other to eliminate the gap after the forward movement of the plunger is started and before the molten metal reaches a molten metal surface height at which the molten metal flows into the gap.

A gap control part controls a clamping device so that mating surfaces in a die face each other across a gap, and thereby a cavity and an external part of the die communicate across the gap. A molten metal feed control part controls a molten metal feed device so as to feed molten metal into a sleeve when the gap is being maintained. An injection control part controls an injection device so as to start a forward movement of a plunger at a time when the gap is maintained and there is the molten metal in the sleeve. A clamping control part controls a clamping device so as to make the mating surfaces abut against each other to eliminate the gap after the forward movement of the plunger is started and before the molten metal reaches a molten metal surface height at which the molten metal flows into the gap.