Gravity casting machine manufacturers tell you the principle of gravity casting machine

Do you know the principle of Gravity Casting Machine? Gravity Casting Machine manufacturer. Let me tell you. Gravity casting refers to the process of injecting molten metal into a mold under the action of the earth's gravity, also known as gravity casting. Broadly speaking, gravity casting includes sand casting, metal mold casting, investment casting, lost foam casting, mud mold casting, etc.; narrowly speaking, gravity casting mainly refers to metal mold casting.

1. There are many processes for making metal materials into the required products, such as casting, forging, extrusion, rolling, drawing, stamping, cutting, powder metallurgy, etc. Among them, casting is the most basic and most commonly used process.

2. The molten metal liquid is injected into a hollow mold made of high-temperature resistant materials, and the expected shape of the product is obtained after condensation. This is casting. The resulting product is a casting.

3. Casting can be divided into ferrous metal casting (including cast iron and cast steel) and non-ferrous metal casting (including aluminum alloy, copper alloy, zinc alloy, magnesium alloy, etc.) according to the material of the casting. Precision casting factories specialize in non-ferrous metal casting, with a focus on aluminum alloy and zinc alloy casting.

4. Casting can be divided into sand casting and metal mold casting according to the material of the Casting mold. Precision casting factories are proficient in both casting processes and design and manufacture these two types of casting molds by themselves.

5. Casting can also be divided into gravity casting and pressure casting according to the pouring process of molten metal. Pressure casting refers to the process of injecting molten metal into the casting mold under the action of other external forces (excluding gravity). Broadly speaking, pressure casting includes pressure casting and vacuum casting, low-pressure casting, centrifugal casting, etc. of die-casting machines; narrowly speaking, pressure casting refers specifically to metal mold pressure casting of die-casting machines, referred to as die-casting.

The hydraulic and pneumatic equipment produced by Shengshi Weiye Machinery Technology includes a variety of hydraulic presses such as four-column hydraulic presses, frame hydraulic presses and C-type hydraulic presses, with a pressure range of more than 100 specifications ranging from 1 ton to 2,000 tons. Welcome to consult us.

The basic principle of gravity casting machine: use the basic principle of standard air pressure to pressurize the product and give it a solid shape. Although it sounds simple, its production process is not that easy. To be specific, it first releases 0.01~0.05Mpa of gas pressure or inert gas pressure on the surface of the molten metal in the closed maintenance furnace. Then the molten metal rises through the feed pipe (riser pipe) immersed in the molten metal and is pressed into the upper mold connected to the furnace.

The molten metal gradually begins to fill from the bottom of the die, and solidifies after maintaining the pressure for a period of time. Solidification begins to migrate from the top of the product to the direction of the glue inlet. The time when part of the glue inlet solidifies is the time when the pressure is completed. Therefore, the perfect casting is obtained by the specific solidification of the glue inlet and the pressure effect of the riser starting from the glue inlet. In gravity casting, due to the gravity field in the mold, the liquid metal is easier to fill the entire mold, and a good solidification structure is formed during the solidification process, thereby obtaining high-quality castings.

Finally, when the casting is cooled to below the solidus temperature, the product can be removed from the mold. The pressure and speed of gravity casting can be adjusted, so it can be used for various different metal molds (such as metal molds, sand molds, etc.), casting various alloys and castings of various sizes.

The molten metal starts to fill slowly from the bottom of the die, and solidifies after maintaining the pressure for a period of time. The solidification starts from the top of the product to move to the injection port. The time when part of the injection port solidifies is the time when the pressure is completed. Therefore, the perfect casting is obtained by the specific solidification of the injection port and the pressure effect of the riser starting from the injection port. In gravity casting, due to the gravity field effect in the casting mold, the liquid metal is easier to fill the entire casting mold, and a good solidification structure is formed during the solidification process, thereby obtaining high-quality castings.

Finally, when the casting is cooled to below the solid phase temperature, the product can be taken out of the mold. The working pressure and speed of gravity casting can be adjusted, so it can be used for various different metal molds (such as metal molds, sand molds, etc.), forging various aluminum alloys and various sizes of castings.