The Causes of Metal Splash During the Production of Aluminum Alloy Die Castings

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Metals such as gold and silver were utilized in a variety of ways throughout history, including in ancient times

Metals such as gold and silver were utilized in a variety of ways throughout history, including in ancient times. When discussing the historical beginnings of the industry of aluminum alloy die-casting, one must look no further than the development of modern civilization.

The technology of die-casting aluminum has developed along with the progression of human civilization. In ancient times, there were other metal applications, such as gold and silver, but from the perspective of the development of casting technology, the process of aluminum alloy die-casting typically includes forming, production range, and assembly of casting molds. Other metals, such as gold and silver, were used as well.

In reality, the term "styling" refers to the process of product prototyping. The process of creating a pattern that is 1:1 scale and conforms to the structural design of the product ordered by the customer is referred to as molding. The casting cavity is obtained by duplicating the model, which is done based on the casting model, also known as the pattern. After the model slurry has been dried and solidified with the slurry CNC machining parts, the casting cavity can be obtained. Masks can be combined using a variety of different modules. Recently, a friend informed me that in the process of die-casting aluminum alloys, some manufacturers disperse the metal. This begs the question: why does the metal splash?

Next, let's hear it from the experts themselves as to why. When it comes to the interpretation of aluminum alloy die-casting parts, the reason for the metal outer jump is that the fit between the movement and the molding is not tight, the gap between the two is large, or the metal outer jump was caused by the insufficient locking force, the die-casting motive, the improper molding and installation Parallel, or die-cast movement and molding. Alternately, the support plate may have a large width, and as a result, the pressure may cause the sleeve to deform into the shape of a sprayer.

In light of these considerations, in order to carry out the subsequent commissioning, the mold must first be reinstalled. For the housing to be more rigid, the module force should be increased, the die-casting should be adjusted, the mounting plate for the die-casting should be made parallel, and a support plate should be added to the moving template.

Castings made of conventional aluminum alloys are either damaged or destroyed, which leads to the formation of narrow gaps (with a length of up to 50 mm and in the form of parallel lines or corrugations). These gaps have a tendency to widen when they are subjected to the action of external forces. Crack is the name given to this imperfection.

1. to cause

Atypical elements make up the aluminum material, which contributes to improved die adhesion thanks to the material's peculiar composition. Cracks will appear in the aluminum alloy when the drawing die is too serious, even if the composition of the alloy does not change. Assuming that the composition of the aluminum alloy does not change, the casting of the aluminum alloy will cause cracking at high temperatures even though the composition of the aluminum alloy has not changed. Aluminum casting businesses and the institutions in the surrounding area are in an obvious state of contraction. Due to the different cooling sequence that occurs during condensation, the outer area contracts first. This results in an outward tensile stress at that point, which in turn creates cracks at the part of the structure that is contracting.

2. Improvement countermeasures

Correct treatment of aluminum alloy composition, pure aluminum can be added to the aluminum alloy under certain conditions in order to reduce the magnesium content in the aluminum alloy or the problem of adding aluminum and silicon in the aluminum alloy profile, which results in an increase in the silicon composition;An excessive temperature, through the use of water cooling to dissipate heat, the improvement of the cooling channel in this area, and a reduction in the temperature of the mold in this area; the maintenance of the mold's thermal cycle; a change in the structure of the aluminum alloy casting, an increase in the arc, a change in the draft angle, and a reduction in the difficulty factor of demolding;Reduce the difference in wall thickness that exists between the various aluminum castings that are produced, and either change or improve the extrusion part, so that the pressure bearing capacity of the extrusion is consistent throughout, and remove some of the excessive force.

The connection between die casting in aluminum alloy and pouring temperature

The quality tracking of the aluminum alloy die-casting production process revealed a total of 35 scraps that had a significant relationship with the pouring temperature. These scraps were found during the production process.

For aluminum alloy die-casting porosity, the residual porosity accounts for 74.3% when the casting temperature is lower than 1430 °C; research indicates that the lower casting temperature is the primary reason for the high scrap, and the casting temperature is 14001440 °C. There is an effect that can be achieved by lowering the porosity of waste products. The temperature at which the pouring occurs needs to be raised appropriately. The measured temperature of the first box of each package of aluminum alloy die casting liquid pouring was used to determine the nearby pouring temperature, which was found to be in the range of 1430–1460 ° C. This temperature range has been shown to effectively reduce the pores in aluminum alloy die castings.

It has been determined that the pouring temperature is between 1430 and 1460 degrees Celsius, and that mass production has been achieved as a result of this discovery. This was accomplished by analyzing the location and cause of the main pores. When the pouring temperature was raised from 1400–1440°C to 1430–1460°C, the porosity decreased by 4.4%, and the porosity waste decreased by 46%. These results were achieved under the condition of 1430–1460°C.

The surface tension of the flowing molten aluminum has a very low value when it is being poured. When it is difficult to discharge the sand core, the gas that is released from the sand core is immersed in the moving molten aluminum. The surface tension of the molten aluminum rises as a result of two factors: bubbles that are completely submerged in the molten aluminum are unable to easily escape, which contributes to the rise in surface tension of the molten aluminum. After the pouring temperature has been raised, the temperature of the molten aluminum on the upper box surface has been raised, the surface tension of the molten aluminum has been reduced, the bubbles that have been soaked in the molten aluminum are easily able to escape, and it is difficult to form pores in the molten aluminum.

Additionally, even if the sand core and the sand core, the sand core and the sand mold are poorly sealed, and the molten aluminum is produced, the temperature of the molten aluminum on the upper box surface is relatively high (that is, the temperature of the molten aluminum in the riser and the vent pinhole is relatively high), in order to increase the fluidity of the aluminum liquid in the upper tank riser and ventilation pinholes, and inject the aluminum liquid into the castPouring at temperatures between 1430 and 1460 degrees Celsius, rather than at temperatures between 1400 and 1440 degrees Celsius, can significantly cut down on the amount of waste produced during the aluminum alloy die-casting process. This is the case when the production conditions include a lower pouring system, a top surface, a front row riser, and high-pressure automatic line green sand.