Cast molding method and devices thereof

Abstract

A cast molding method accomplishes the cast molding by a smelting chamber, a casting chamber, a hinge press system and a vacuum system. First, a metallic die is assembled in the casting chamber and then a metallic material is put in the smelting chamber. Next, the metallic material is heated up in a vacuum state and the casting chamber is pre-heated at a same time. After the metallic material in the smelting chamber has been melted down and the casting chamber has been vacuumized, the melted metallic material is filled into the metallic die, and then the hinge press system is turned on to cast mold the metallic die, resulting in a semi-solid product. After the semi-solid product has been cooled down, the product of cast molding is accomplished according to the present invention.

What is claimed is: 
     
         1 . A cast molding method accomplishing the cast molding by a smelting chamber, a casting chamber, a hinge press system and a vacuum system, and the cast molding method comprising following steps:
 providing a metallic die and assembling the metallic die in the casting chamber;   providing a crucible and assembling the crucible in the smelting chamber, then loading a metallic material in the crucible and vacuumizing the smelting chamber using the vacuum system;   heating up the metallic die to 40° C. to 500° C.;   heating up the crucible to the melting point of the metallic material to melt down the metallic material;   vacuumizing the metallic die in the casting chamber using the vacuum system;   filling the metallic die with the melted metallic material in the crucible;   turning on the hinge press system to forge the metallic die, accomplishing a semi-solid product; and   accomplishing the product after the semi-solid product has been cooled down.   
     
     
         2 . The cast molding method according to  claim 1 , further including a gas supply system to provide an anaerobic gas into the crucible. 
     
     
         3 . The cast molding method according to  claim 2 , wherein the anaerobic gas supplied by the gas supply system is argon or nitrogen. 
     
     
         4 . The cast molding method according to  claim 1 , wherein the vacuum system vacuumizes the crucible to a vacuum degree of 0.3×10 −1  Pa˜1.0×10 −1  Pa. 
     
     
         5 . The cast molding method according to  claim 1 , wherein the vacuum system vacuumizes the metallic die to a vacuum degree of 0.3×10 −1  Pa˜ 1 . 0 × 10   −1  Pa. 
     
     
         6 . The cast molding method according to  claim 4 , wherein the vacuum system is provided with at least a vacuum pump. 
     
     
         7 . The cast molding method according to  claim 6 , wherein the vacuum system is provided with a first vacuum pump and a second vacuum pump. 
     
     
         8 . The cast molding method according to  claim 7 , wherein the first vacuum pump is a mechanical pump which forms low vacuum in the smelting chamber and the casting chamber. 
     
     
         9 . The cast molding method according to  claim 7 , wherein the second vacuum pump is a Root's pump which forms high vacuum in the smelting chamber and the casting chamber. 
     
     
         10 . The cast molding method according to  claim 1 , wherein the metallic material is Titanium, Titanium alloy, aluminum alloy or stainless steel. 
     
     
         11 . The cast molding method according to  claim 1 , wherein the metallic material is Titanium alloy and the crucible is heated up until the Titanium alloy reaches 1600° C. to 1800° C. 
     
     
         12 . Devices of the cast molding method, comprising:
 a smelting chamber, the smelting chamber being provided with a roof, a crucible and a first heating unit, with the first heating unit heating up the crucible and the roof being covered on a top of the smelting chamber;   a casting chamber, the casting chamber being disposed at a side of the smelting chamber and being provided with a holding space to accommodate the metallic die, with the casting chamber also being provided with a guide tube connecting the crucible and the holding space;   a hinge press system, the hinge press system being disposed at a side of the casting chamber and being provided with a control unit, a second piping, a power unit and a hinge press bar, with the second piping being connected respectively to the control unit and the power unit, the hinge press bar being connected with the power unit to provide power to the hinge press bar to move toward the holding space; and   a vacuum system, the vacuum system vacuumizing the smelting chamber and the casting chamber respectively, and being provided with at least a vacuum pump.   
     
     
         13 . The devices of the cast molding method according to  claim 12 , further including a gas supply system, with the gas supply system being disposed at a side of the smelting chamber and being provided with a storage tank and a first piping, with the first piping being connected to the storage tank and the smelting chamber to supply an anaerobic gas into the crucible. 
     
     
         14 . The devices of the cast molding method according to  claim 12 , wherein the vacuum system is provided with a first vacuum pump and a second vacuum pump. 
     
     
         15 . The devices of the cast molding method according to  claim 14 , wherein the first vacuum pump is a mechanical pump which forms low vacuum in the smelting chamber and the casting chamber. 
     
     
         16 . The devices of the cast molding method according to  claim 14 , wherein the second vacuum pump is a Root's pump which forms high vacuum in the smelting chamber and the casting chamber. 
     
     
         17 . The devices of the cast molding method according to  claim 12 , wherein the hinge press system is a hydraulic oil pressure system. 
     
     
         18 . The devices of the cast molding method according to  claim 12 , wherein the power unit is a hydraulic pressure boosting cylinder. 
     
     
         19 . The devices of the cast molding method according to  claim 12 , wherein the casting chamber further includes a second heating unit. 
     
     
         20 . The devices of the cast molding method according to  claim 19 , wherein the second heating unit is a heating coil or heating resistor. 
     
     
         21 . The devices of the cast molding method according to  claim 12 , wherein the first heating unit is a heating coil and is wrapped outside of the crucible. 
     
     
         22 . The devices of the cast molding method according to  claim 12 , wherein the hinge press bar is disposed below the holding space or is disposed next to the holding space.