Low-voltage Casting Technology Technology of Industrial Aluminum Shell-WJW Aluminum Supplier Aluminum

With the advancement of scientific skills, a higher request for the internal quality and appearance of the casting. The demands of castings and other industries for castings are developing towards thin walls, complicated appearance, high -strength, and high -quality directions, making the casting industry aluminum in recent years. The chiefs of aluminum and silicon alloy are not developed, and the temperature interval of the knot product is the smallest of aluminum materials in the casting industry. In a period of time after the solidification process, the alloy liquid can still flow, and there is at the temperature adjacent to the solid phase line. Higher strength, so its casting function in the casting industry is the best. However, it is easy to produce a concentrated shrinkage, so a large portion must be set to make up; some elements in the industrial aluminum are more lively. Not only are it easy to oxidize in the melting process, but in the pouring process, the bias of the secondary oxidation is also very very different. Large, it is easy to form oxidation residue; in addition, the industrial aluminum liquid has a strong inhalation bias, and it is easy to react with the water to present the pinhole of the casting. For the disadvantages of the disadvantages of oxidative slag, stomach, pinhole, shrinkage, shrinking pine, etc. in Hangzhou Hangzhou Oxygen Casting Co., Ltd. , Realized the batch production of the passing of the grid casting. Analysis of the introduction of casting and quality request 2 box craft plan 2.1 The quality T problem of gravity pouring process. There are only a lot of cold iron and qi, but the rate of finished products is still very high. Often presenting the disadvantages of oxidation slag, pores, shrinkage and other disadvantages on the castings. 2.2 The formulation of the quality of the low -voltage casting process for the quality of gravity pouring. In order to produce the time of the passage, after analysis of the specific skills, the low -voltage casting process is cast. Figure 1 shows. When designing the low -voltage casting process, this casting has adopted the stabilization and solidarity process casting skills. Its process characteristics are: the lifting speed is slow, the charging speed is slightly faster, and the coagulation pressure is small. Crystal solidification under the pressure of the lower or slightly high charging, until the casting is completely solidified and relieved. 2.2.1 The selection criteria for pouring temperature pouring temperature are similar to the individual pouring method. Under the premise of ensuring the molding, the lower the better. 2.2.2 Charging pressure and charging speed charging pressure and charging speed are important process parameters of low pressure casting, which directly affects the quality of the casting. The industrial profiles are squeezed by hot melt to obtain aluminum materials of different section shapes, but the proportion of the added alloy is different. When the charging speed is too fast, the gas in the cavity will not be discharged in the middle of the cavity, and the shortcomings of the casting contour, the pores or not poured; The landing of talents will also lead to the shortcomings such as cold separation and not being poured. According to the principle of BASG P = Hg, the calculation of the charging pressure is 0.12MPA-0.16MPa. The charging time is 15s-30s. 2.2.3 The solidification pressure of the supercharged and the supercharged speed casting should be greater than the charging pressure. The actual shows that the greater the solidarity pressure, the better the shrinking consequences, and the more dense the cast tissue is obtained. It will not only affect the size accuracy and nominal roughness of the castings, but even cause the casting sticky sand and the swelling box, because the quality request of this casting is high, and the solidification pressure is 0.L3MPa-0.16MPa according to the lesson. 0.006mpa/s. 2.2.4 Preservation time The pressure time is usually used in the casting to have no shrinking holes at about 40mm in the casting lane or the time required by about 40mm residue. The pressure time for this piece is 10min-15min. 2.2.5 Casting imitations Utilize the use of Huar casting CAE solidification imitation and analysis software to verify and perfect process plans, and the liquid phase distribution of the solidified process is integrated with process requests, as shown in Figure 3 shown in Figure 3. 2.2.6 Operation request. In addition to being fulfilled in accordance with the above plan, this casting should also meet the following requests: (L) When the shape of the shape, the high point of the box casting is required to put 3mm gas at the corner. (2) The placed cold iron working surface must be cleaned and not contaminated. (3) Two times the casting of the casting, the core, and the cold iron paint paint, the casting must be placed for 4h for the casting before the painting coatings, so as to facilitate the volatilization of the sandwiches. (4) The name of the cold iron in front of the box needs to be baked to remove the water, and immediately pour it after the box. The industrial profiles are squeezed by hot melt to obtain aluminum materials of different section shapes, but the proportion of the added alloy is different. (5) Strictly control the rules of the melting operation process. Through strict control of operating procedures and perfect process standards, the victory of this casting has entered a solid mass production, and the product German quantity reaches various examination standard requests. 3 End the lower -pressure low -voltage casting of this type of aluminum silicon shell, and the alloy liquid is stable, reducing the shortcomings of the alloy liquid splash, oxidation residue, and pores. The industrial aluminum is divided according to the field of application. Industrial aluminum refers to all aluminum profiles except building doors and windows, curtain walls, indoor and outdoor decoration and building structure. Promoting the passing rate of the casting. At the same time, on the one hand, because the casting is a crystallization solidification under the action of pressure, it greatly improves the consequences of shrinkage and obtained the tissue -density casting. On the other hand, because the low -pressure casting uses pressure filling and shrinking, it greatly simplifies the structure of the pouring output and improves the production rate of craftsmanship.