Therefore, castings made via the process are solid and are suitable for making parts that require good strength values. Since the casting solidifies under pressure, it can crystallize and form a compact structure. Generally, the process is ideal for making cast parts with complex geometries because of its high formability. Therefore, castings made using the process have a clear outline and smooth surface. The low-pressure filling leads to good formability because of the improvement in the fluidity of liquid metal. Hence, there is no formation of oxidation slags that can affect the purity of the castings. Stability reduces or eliminates tumbling, impacting, and splashing of the molten metal during the process. Moreover, the process does not lead to oxidation of the molten metal due to the stable filling process. ![]() Also, since this is a low pressure process, the chance of slag entering the mold is low. However, since the riser tubes go down the holding furnace, the liquid metal forced into the cavity does not contain slags. Generally, slags are on the surface of molten metals. The low level of slag is due to the setup of the casting machine. The castings are highly pure due to the little to no slag responsible for the impurity. Due to the high accuracy, it is the best method for making axially symmetrical parts such as wheels. Therefore, there is a continual filling of the die cavity, compensating for the shrink in volume as the molten metal solidifies. This is due to the maintained low pressure during the solidification. Parts made using the process are highly accurate. Below are a few advantages of the process. LPDC has many advantages making it an applicable die casting method in several industries. Finally, the casting will be easily removed once the mold is cooled. On solidification, the pressure is released, and the remaining molten metal goes back through the riser tube to the holding furnace for recycling. The liquid metal moves under constant pressure until the molten metal solidifies in the die cavity. Low pressure forces the molten metal through a riser tube into the mold. The molten metal will then go to a holding furnace below the mold, which functions as a container while maintaining the liquid at the casting temperature. For example, aluminum has a casting temperature of 710-720 0C. The process begins with a melting furnace which melts the metal alloys and brings them to the casting temperature. Below is an illustration of the setup and pieces of equipment that are needed. Unlike the traditional die casting process, it has a unique setup and uses several pieces of equipment. Low-pressure die casting uses small pressure, typically around 20-100 kPa (2.9-14.5 psi), instead of gravity to fill a die. ![]() ![]() Other attributes include reduction in oxide formation and porosity and superior consistency of molten metal from top to bottom. This means it compensates for the reduction in volume. It is highly accurate due to the constant filling of the die cavity during the shrinking phase (solidification). LPDC involves filling a die-cast mold with molten metal under low pressure. Therefore, this article will introduce low-pressure die casting, how it works, its advantages and disadvantages, and other alternatives you could use. For example, it allows accurate manufacturing of axially symmetrical wheels, so the automotive industries are a top user of the process.īefore you outsource to a die casting service, it is important to know about the process yourself. From its name, low pressure die casting involves injecting the molten material into the die-cast under a well-controlled low pressure that gives the process advantages.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |