Casting process

　　Lost-in-time mold equipment production lineThe pouring process is the process of molten steel filling and foam mold evaporation. Throughout the process, attention should be paid:

(1) The runner shall be filled with molten steel from beginning to end. If it is not satisfied, the coating strength is limited, which is easy to cause sand collapse and air intake, resulting in casting defects of lost foam casting equipment.

(2) When pouring molten steel, grasp it to ensure stability, accuracy and speed. Instantly fill the pouring cup so that it flows in rapid succession, about one ton of molten steel a minute. If the molten steel of the same box casting is cut off, air will be sucked in, which may cause the sand holes to collapse or increase the air holes of the casting, resulting in the casting scrapped.

(3) The production line of lost vanescent mold equipment adopts negative pressure closed type, and the bottom of the pouring cup should be closed. Molten steel into the forming mold, began to liquefy combustion, gasification disappeared. A temporary cavity is formed within a short distance at the front end of the molten steel, so the design filling speed of the molten steel is approximately the same as the speed at which the foam mold disappears.

In order to prevent molten steel from being radiated to melt other models in the same box at high temperature, the runner should be far away from the lost foam casting equipment to cast the model. When selecting the low position of the whole box casting as the position of the vertical runner for pouring, pay attention to control the vacuum degree of the negative pressure within a certain range, maintain a certain negative pressure state for a period of time after pouring, and then stop the negative pressure, and the molten steel condenses After discharge.

　　Lost-in-time mold equipment production lineThe shortcomings and limitations

Nowadays, the production line of the lost-energy equipment has become an indispensable industry in the society. Its rapid growth in recent years has brought a lot of convenience to automobile production and production applications of various enterprises, fundamentally reducing investment costs and production costs, saving input and output time in all aspects of enterprises, and improving the labor efficiency of workers.Lost-in-time mold equipment production lineAlthough the process is as widely used in manufacturing as other casting processes, it also has its shortcomings and limitations. Not all castings are suitable for such production, should be based on the lost foam casting equipment casting itself to analyze. We can consider whether to adopt this method from the following aspects:

The size of castings mainly considers the scope of application of corresponding equipment (such as tamping table and sand box).

The larger the batch of castings, the more substantial the economic benefits.

3. Casting structure, the more complex the casting structure, the more it can be realizedLost-in-time mold equipment production lineadvantages and economic benefits. For the narrow inner cavity channel and interlayer on the structure, before using the lost foam equipment production line, it is necessary to carry out the test in advance before putting into production.

4. The sequence of casting materials with good applicability and poor applicability is roughly as follows: gray cast iron-non-ferrous alloy-ordinary carbon steel-ductile iron-low carbon steel and alloy steel; Through necessary preparation, the process experiment and debugging cycle will not be too long.

When it is determined that all castings meet the above production conditions, the castings can be cast in accordance with the lost foam equipment production line process. If the product is not suitable for such production, it can be produced and processed according to the production method suitable for the product, which will achieve better results.