Die-casting molds are a method of casting liquid forging, a process performed on a dedicated die-casting forging machine. Its basic technological process is: Molten metal is first filled into the mold cavity at a low speed or high speed. The mold has a movable cavity surface. It pressurizes forging with the cooling process of the molten metal, which eliminates shrinkage shrinkage of the blank. Loose defects also make the internal structure of the blank reach the forged broken grains. The overall mechanical properties of the blank have been significantly improved.
Designing Process
1. according to the product used in the type of materials, product shape and accuracy of the indicators such as the process analysis, set out the process. Aluminum Die Casting Mould,Motorcycle Cylinder Head Aluminum Die Casting Mould,Reducer Motor Housing Aluminum Die Casting Mould,Die Casting Mold Zheke Mould Technology Co. Ltd. , http://www.zkdiecasting.com
Valve operating conditions is the following :
Installation position: between flash tanks in pressure digestion Function:
Control fluid pressure and flow rate
T = 140ºC - 280ºC and P = PN4.0MPa - 160MPa      Â
Process fluid: slurry, aluminate solution, Na2O 220 g/l  Â
Â
erosive solid-liquid-gas 3-phase medium
Flow rate = 285 m3/h - 3503/h and Density = 1500kg/m3
Pressure drop: â–³P = 2.6 - 0.18MPaÂ
Control range:30 : 1Â
Leakage:ANSI
Harsh operating conditions require valves to have special structural design of durable material and with good flow characteristics for accurate process control
Benefits
Structural improvements have doubled the lifetime and enhanced the control performance of angle type needle valves for alumina digestion flash tanks.
Installation reduces
digestion's operating cost.
Valve lifetime doubled
Less maintenance cost of digestion piping due to longer lifetime of the valve
Less repair of throttle orifice and jet.
Down time caused by orifice failure, erosion and replacement are avoided after installation of the angle need valve.
Angle control valve can be disconnected from the whole allowing testing of disc and seat. In operation, seat and disc are visible and quick-wear parts can be easily replaced.
Specification
Valve Size : 2"-16"Â Â DN50-DN400
Pressure :Â Â Class 150-Class 900Â Â Â Â PN1.6-PN16Â
Valve body material :Â WCB
Connection method: Flange
Driving method :Â Electric
Design Standard : ASME B 16.34Â Â Â
Application
Alumina Plant , High -presure digestion workshop , tube digestion process , nine -level self evaporator ,feeding 
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2. Determine the position of the product placed in the mold cavity, analyze and design the parting surface, overflow system, and pouring system.
3. Design core assembly and fixing methods for each activity.
4. pull core distance and force design.
5. the design of the ejection mechanism.
6. determine the die casting machine, the mold frame and cooling system design.
7. Check the relative dimensions of the die and the die casting machine, draw the die and the artwork of each component.
8. the design is completed.
Electric Angle Type Needle Valves for Alumina Digestion Flash Tanks
Model NO.: T944Y-160C
Material: Alloy
Type: Single Seater
Design Standard: GB/T 12235.
Trademark: Quanshun
Transport Package: Polywood Case
Specification: DN50 to DN400
Origin: Zhengzhou China
HS Code: 848100001
High temperature, pressure tube digestion technology is widely used for alumina refining In the tube, turbulence of bauxite slurry flow allows for efficient heat transfer and short digestion time Hard to dissolve diasporic bauxite requires 9 pre-heating stages followed by 8 flashing stages before discharging in the dilution tank.Electric AngleType Needle Valves are designed especially for Alumina Digestion Flash Tanks.