The surface of the welding wire and the die-casting parts both have oil stains that have not been cleaned, and the argon gas that is being used is not pure. In some of the commercially available argon gas, there are many impurities, and some of it even contains water vapor. Because of this, it is important to choose gas that is of a high quality. When alloy die-casting is being done, poor control of the die-casting angle often results in the mold sticking angle occurring. How do you figure out this angle's measurement?Die-casting is a process in which the draft angle of the mold changes depending on the alloy used and the height of the casting. In general, the draft height of aluminum alloy die-casting parts can range anywhere from 3mm to 250mm: the draft slope of the inner wall is half of the draft slope of the outer wall, and the draft slope of the circular core is the same.
The die casting has several holes for ventilation. The reason for this is that the direction of the metal flow is going in the wrong direction, so it is making a frontal impact with the casting cavity. This causes eddy currents to form around the air, which then results in the formation of air bubbles. Because the ingate is inadequately sized, the metal flow rate is excessive, and the vent hole is prematurely blocked before the air is removed, the gas is not expelled from the casting and instead stays trapped inside. If the cavity is too deep, it is difficult to ventilate and exhaust, the design of the exhaust system is unreasonable, and the method for adjusting the exhaust is difficult. All of these problems arise because the cavity is too deep. It is necessary to adjust the dimensions of the diverter cone in order to prevent the cavity from being positively affected by the metal flow. Raise the level of color oxidation of the inner gate to an appropriate level. During the die-casting process, you should modify the design of the mold and create an exhaust groove that is reasonable in its design in order to increase the air cavity. This will cause the molten metal to splash out.
If the process of pre-treatment degreasing is not carried out completely, it will cause obvious white spots on the film layer, which will cause coloring to be difficult. When the concentration of Sn salt in the electrolytic solution is too low, the coloring speed is slow. The coloring speed is also slow when the concentration of Sn salt in the electrolytic solution is higher than 25g/L. The coloring speed is quick, but it is difficult to get the hang of, and there are frequent instances of color variation. The coloring is significantly impacted by the temperature of the coloring process. When the temperature is lower than 15 degrees Celsius, the coloring process moves at a more snail's pace. If the temperature is too high, the coloring film will become cloudy, and the tin salt will hydrolyze and reverse easily, which will result in the bath becoming cloudy. The amount of time spent coloring will also have an impact casting services on the quality of the coloring and the durability of the colors. When the coloring time is too short, the color is weak and easily lost, and when the coloring time is too long, the surface tends to bloom. When the coloring time is just right, the color is deep and stable.
When the coloring voltage is low, the coloring speed is slow, the color change is slow, and it is easy for an uneven color tone to occur. When the coloring voltage is high, zinc alloy die casting however, the coloring speed is fast. When the voltage is high, the coloring process goes quickly, and the film that contains the colored image is simple to remove. Additives and stabilizers that are primarily based on surfactants are required in both the anodic oxidation film formation process as well as the electrolytic coloring process. The purpose of these additives and stabilizers is to stabilize the film forming speed and film thickness, inhibit the dissolution of the oxide film, and improve the coloring uniformity.
Both the magnesium alloy die-casting and the aluminum alloy die casting services die-casting industries are still facing a great deal of difficulty.
As is the case with die-casting aluminum alloys, the amount of energy required to produce magnesium raw materials is significantly higher than the amount of energy required for recycling, which means that magnesium alloys can be recycled in their entirety. Taking magnesium alloy die-casting as an example, magnesium alloy ingots, in addition to being used for castings, will also generate other consumption if they are consumed in other ways. In order to reduce the amount of resources that are used, magnesium alloy die-casting factories that operate on a regular basis should install a comprehensive material flow control system.
It is necessary to strengthen and better integrate the industrial chain. Raw and auxiliary materials, alloy materials, forming processing, and final machine products all have some sort of technological and economic connection to one another. The magnesium alloy die-casting industry's industrial agglomeration has not yet formed a cluster advantage, and the structure of the industry needs to be continuously adjusted and optimized. The coordination of an entire industrial chain is necessary in order to realize the healthy development of the recycling and reuse of magnesium processing. The foundation for the realization of industrial chain coordination is die casting China government guidance, industry promotion, technological development, and the construction of standardization.
The quality of alloy materials as a whole is subpar, and the grades of aluminum alloy die castings and magnesium alloy die castings are both below average. The production of magnesium alloy die castings with a high value-added is hampered by a number of fundamental factors, including low technological development capability, low technology development capability, poor magnesium raw material quality, outdated production equipment and technology, and a lack of core technology. The casting technology and equipment are both in poor condition, and the technology and equipment do not complement one another. The design and production of molds are primarily transferred to aluminum alloy die-casting, and there is a need for an improvement in the level of professional competence. The equipment used in the production of raw and auxiliary materials is relatively straightforward, the technology is antiquated, and there is a dearth of testing procedures. Raw materials and auxiliary materials each come in their own unique varieties, and their quality can be unpredictable. In addition, many of our country's standards have not been revised for a considerable amount of time after they were first developed. This has resulted in a great deal of difficulty in both the manufacturing and the marketing of various goods.
Protection of the natural environment and efficient use of energy are both important but difficult challenges. Many magnesium alloy die-casting factories, due to their antiquated business philosophies, production technologies, and equipment, generate a significant amount of hazardous gas and dust during the manufacturing process. This not only contributes significantly to the pollution of the surrounding environment, but it also poses a risk to human health. The product has a low level of overall specialization, a low level of technical level, and a low level of management level; as a result, it has a high scrap rate, it uses a lot of energy, and it has poor quality. Technology that is not up to date, a dearth of skilled workers, an absence of adequate capabilities for the development of new technology and new products, a market that is dominated by a single company, and a lack of value added to products. The gradual accumulation of technology over time and the development of fundamental capabilities are not only necessary for producing high-quality goods but also serve as the foundation for expanding into new market niches. At this time, there is no fully functional magnesium recovery and regeneration system in place. When compared with the production of new magnesium materials, the production of recycled magnesium requires a significantly lower amount of both the energy that is used per ton and the amount of carbon dioxide that is produced. Therefore, the recovery and regeneration of magnesium is a requirement of the times in light of the need to save energy, conserve resources, and protect the environment. The recovery of magnesium is more difficult than the recovery of aluminum from a technical standpoint, and the industry that casts magnesium alloys should pay full attention to this from the beginning of the development strategy process.
