Low Pressure Casting - High and low pressure casting, gravity casting, mold making, focus on aluminum alloy casting factory

Low Pressure Die Casting Principles and Applications

2024-11-13

What is low pressure die casting? Aluminum low pressure die casting (LPDC) is to make liquid metal under pressure to complete the filling cavity and solidification process two get casting a casting method. Because there is a certain pressure but far lower than the pressure of high-pressure die casting (the highest pressure is only for high-pressure die casting 1%), low-pressure die casting pressure range in (20 ~ 60kPa), there is a small pressure for its role in the slow speed, but also be able to manufacture a more complex internal hollow products (hollow part of the need for the sand core subsequent to the removal of the so-called low-pressure sand casting), and the principle of its role is closer to the Aluminum alloy casting, so it is also called aluminum low pressure casting. Low-pressure die-casting process: in the impermeable crucible, through the pipeline into the compressed dry gas, molten aluminum under the action of gas pressure, along the rising liquid tube (crucible middle...

Aluminum alloy gravity casting, high-pressure casting, low-pressure casting process introduction awareness

2024-09-04

Gravity casting introduction: gravity casting refers to the aluminum liquid in the earth's gravity under the action of gravity injection casting process. Broad gravity casting gravity casting is divided into sand casting, metal type (steel mold) casting, disappearing mold casting. ; Narrow gravity casting refers to the metal type casting. Metal casting is divided into upright hand casting, tilted casting is now most commonly used metal mold (steel mold) casting. The mold is made of heat-resistant alloy steel, casting aluminum castings strength, size, appearance are higher than other casting processes. Aluminum liquid for gravity casting is generally poured manually into the gate, relying on the self-weight of the metal liquid to fill the cavity, exhaust, cool, and open the mold to obtain the sample. The process flow is generally as follows: aluminum liquid melting, pouring, exhausting, cooling, mold opening, cleaning, heat treatment, processing. -Ningbo Hexin Aluminum alloy gravity castings are ...

Difference between casting flange and forging flange

2024-09-03

Casting flange Casting flange, blank shape and size accuracy, small processing, low cost, but there are casting defects (porosity. Cracks. Inclusions); casting internal organization streamline is poor (if it is cutting parts, streamline is poor); forging flange is generally lower than casting flange, low carbon content, not easy to rust. Forging streamline good, dense organization, mechanical properties better than casting flange; if the forging process is not appropriate, the grain will be large or uneven, there will be hardening cracks, forging cost is higher than casting flange. Forgings can withstand higher shear and tensile forces than castings. The advantages of castings are complex shape and low cost; uniform internal organization, no casting holes, inclusions and other harmful defects; casting flanges and forging flanges, such as centrifugal flanges, belong to one of the casting flanges. Centrifugal flange is a precision casting...

Low pressure casting equipment

2024-08-05

Low-pressure casting (low-pressure casting) equipment is the production of aluminum alloy low-pressure casting products, usually used in batch product production and manufacturing industries: such as aluminum alloy low-pressure casting automobile wheel production, steering knuckle production, automobile transmission, safety explosion-proof shells, automobile gear box production. Today Ningbo Hexin explains the composition of low-pressure casting equipment: 1. Machine: The machine is one of the components of the low-pressure casting machine. The machine is the platform that prevents the mold. Because the machine needs to place the mold, the machine's material should usually choose a strong, slightly thicker steel to ensure that the mold is placed after the stable, safe and reliable operation of the equipment . 2. Holding Furnace: Holding Furnace usually has a crucible and a melting pool. Its function is to insulate the metal material (usually aluminum alloy), keep the temperature of the molten metal material within a reasonable range, the holding furnace should...

Difference between low pressure casting and gravity casting

2024-08-05

Low-pressure casting and gravity casting are aluminum alloy casting process, low-pressure casting is also known as anti-gravity casting, low-pressure casting. Low pressure casting is also known as anti-gravity casting, low pressure casting. The difference between it and gravity casting is mainly reflected in the following aspects. The difference between the casting principle of operation: the difference between the casting principle of operation: low pressure casting is also known as anti-gravity low pressure casting, so the name of the casting method is through the gas pressure against gravity casting molding, as shown in the figure on the right: through the sealed crucible injected into the gas (usually 0.06 ~ 0.15MPa)), the aluminum liquid in the role of pressure through the middle of the pipeline, the product for the molding of the casting, holding pressure for a certain period of time, the aluminum water cooled in the mold cavity, the aluminum water cooled in the mold cavity. Aluminum water in the mold cavity cooling molding, through the discharge of gas pressure, open the mold, remove the product. Gravity casting refers to the casting of aluminum water through the action of gravity → filling → solidification and contraction → casting, this...

How the low pressure casting machine operates

2024-08-05

First, the operation of the overview of the low-pressure casting machine is a use of air pressure principle to realize the important casting equipment for metal liquid casting. In order to ensure the safe, stable and efficient operation of the equipment, and to improve the quality and productivity of casting products, this operating procedure has been formulated. This procedure specifies in detail the operation, care and maintenance of the low-pressure casting machine, designed to ensure the safety of the operator and the normal operation of the equipment. Second, the content of the operation Third, the precautions This operating procedure is the latest operating requirements of the low-pressure casting machine, the operator should strictly comply with, to ensure the safety of the equipment, stable and efficient operation.

Low-pressure casting machine operating procedures

2024-08-05

I. EQUIPMENT INSPECTION 1. Carefully inspect all parts of the low pressure casting machine to make sure there is no damage or looseness. 2. Confirm the sufficiency of lubricating oil and grease and add or replace them in time. 3. Check whether the electrical equipment and wiring are normal to eliminate potential safety hazards. 2. OPERATING STEPS 1. Turn on the power switch of the low pressure casting machine, and adjust it to the working voltage. 2. Check the temperature controller to make sure the working temperature is Start the low-pressure casting machine to ensure the normal operation of all components, 4. Check the mold and mold surface finish, clean the mold of impurities and residues, 5. Coat the mold with a layer of grease to ensure that the product molding smoothly. 6. Pour the melted metal liquid into the low-pressure casting machine hopper, start the casting machine. 7. Control the low-pressure casting machine's working pressure and time, to ensure that the product molding ...

Low pressure casting process

2024-08-05

Low pressure casting is a method of forming castings by filling them with liquid metal under pressure. It is called low-pressure die casting because it uses very low pressure. The process flow (see Figure 1) is: in the sealed crucible (or sealed drill), into the dry compressed air, liquid metal 2 in the gas pressure, along the ascending tube 4 rise, through the gate 5 smooth into the cavity 8, keep the crucible recreational hydraulic pressure until the casting is completely solidified, and then relieve the hydraulic pressure, so that the open tube is not solidified liquid metal flow crucible collapsed, and then open the casting through the cylinder 12. The process specification of low pressure casting includes charging, pressurizing, preheating temperature, injection temperature, casting coating, etc. (1) Charging and pressurizing Lifting pressure refers to the pressure required when the level of the metal liquid rises to the mouth of the stream. The rise of the metal liquid in the ascending tube should be as slow as possible, in favor of the cavity gas...

Low pressure casting aluminum wheel hub crack formation causes and improvement measures

2024-08-03

Low-pressure casting can achieve a high degree of mechanization and automation, improve productivity (10 ~ 15 type / h), it can also reduce many human factors that are detrimental to the production process, improve the rate of finished products, and greatly reduce the labor intensity of workers. However, the quality of low pressure casting by the process plan, process parameters, mold structure and manual operation and other factors, any design unreasonable or improper operation of the link may lead to low pressure casting defects. The generation of aluminum wheel cracks is an important factor that affects the production cost and productivity of enterprises. Therefore, it is particularly important to discuss the causes of cracks in low pressure casting aluminum wheels. Next, I will discuss with you the formation and elimination measures of low pressure casting aluminum alloy automotive wheel cracks in China. The main factors affecting the generation of cracks For the same alloy, whether the wheel hub is cracked or not, towards...