The Process of Aluminum Die Casting

The following are the four steps in traditional die casting, also known as high-pressure die casting, these are also the basis for any of the die casting variations: die preparation, filling, ejection, and shakeout. The dies are prepared by spraying the mold cavity with lubricant. The lubricant both helps control the temperature of the die and it also assists in the removal of the casting. The dies are then closed and molten metal is injected into the dies under high pressure; between 10 and 175 megapascals (1,500 and 25,400 psi). Once the mold cavity is filled, the pressure is maintained until the casting solidifies. The dies are then opened and the shot (shots are different from castings because there can be multiple cavities in a die, yielding multiple castings per shot) is ejected by the ejector pins. Finally, the shakeout involves separating the scrap, which includes the gate, runners, sprues and flash, from the shot. This is often done using a special trim die in a power press or hydraulic press. Other methods of shaking out include sawing and grinding. A less labor-intensive method is to tumble shots if gates are thin and easily broken; separation of gates from finished parts must follow. This scrap is recycled by remelting it. The yield is approximately 67%.

The high-pressure injection leads to a quick fill of the die, which is required so the entire cavity fills before any part of the casting solidifies. In this way, discontinuities are avoided, even if the shape requires difficult-to-fill thin sections. This creates the problem of air entrapment, because when the mold is filled quickly there is little time for the air to escape. This problem is minimized by including vents along the parting lines, however, even in a highly refined process there will still be some porosity in the center of the casting.

Most die casters perform other secondary operations to produce features not readily castable, such as tapping a hole, polishing, plating, buffing, or painting.

From wikipedia https://en.wikipedia.org/wiki/Die_casting#Mold_or_Tooling

Titanium Tube And Shell Heat Exchanger

A heat exchanger is a device that transfers part of the heat of the hot fluid to the cold fluid, also known as a heat exchanger. Heat exchangers occupies an important position in chemical, petroleum, power, food and many other industrial productions. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers, etc., and are widely used .

Classified by purpose
1. Heater The heater heats the fluid to the necessary temperature, but there is no phase change in the heated fluid.
2. Preheater The preheater preheats the fluid to provide standard process parameters for process operations.
Heat Exchanger
Heat Exchanger
3. Superheater The superheater is used to heat the fluid (process gas or steam) to a superheated state. 4. Evaporator The evaporator is used to heat the fluid to a temperature above the boiling point to evaporate the fluid, generally with a phase change.
Classified by structure
It can be divided into: floating head heat exchanger, fixed tube sheet heat exchanger, U-shaped tube sheet heat exchanger, plate heat exchanger, etc.

Titanium Tube And Shell Heat Exchanger,Titanium Shell And Tube Heat Exchanger,Ss Shell And Tube Heat Exchanger,Pure Titanium Heat Exchanger

Baoji Rowlyn Metal Materials Co., Ltd. , https://www.rowlynti.com