Huawei Mobile Phone Cato Titanium Alloy Wax Loss Casting

Titanium alloy has the advantages of low density, high strength, and strong corrosion resistance. For mobile phone card holders, lower density can reduce the overall weight of the phone and improve user comfort when holding it. High strength ensures that the card holder is not easily deformed or damaged during daily insertion and removal of SIM cards, extending its service life. And excellent corrosion resistance can prevent the card tray from rusting or being corroded in different environments (such as humidity, high temperature, etc.), ensuring the stable appearance and performance of the card tray.

To ensure the quality of the Cato, strict screening of titanium alloy raw materials is required. To control its chemical composition and ensure that the content of each element is within the specified range, in order to ensure the consistency of material properties. At the same time, the physical properties of raw materials (such as hardness, toughness, etc.) are tested, and only materials that meet the standards can be put into production.

1. Design and Modeling

According to the specifications of Huawei's mobile phone card holder, use professional 3D design software for precise modeling. In the design process, full consideration should be given to the compatibility between the SIM card holder and the mobile phone, as well as the functional requirements of the SIM card holder, such as the smoothness of SIM card insertion and removal.

2. Wax molding

Using precision injection molding technology to inject liquid wax into the mold, forming a wax mold for the tray. The accuracy of the mold directly affects the quality of the wax mold, so the mold needs to undergo high-precision processing and strict quality inspection. During the injection molding process, it is necessary to control the temperature, pressure, and injection speed of the wax solution to ensure the dimensional accuracy and surface quality of the wax mold.

1. Coating and hanging slurry

Immerse the prepared wax mold into a specially made refractory slurry to evenly cover the surface of the wax mold with a layer of slurry. The composition and properties of the slurry are crucial for the quality of the shell, and generally include refractory materials (such as silica sand, zircon sand, etc.) and binders. The coating and hanging process should ensure that the slurry is evenly covered to avoid missing or uneven thickness.

2. Sprinkle sand

After applying the slurry, immediately place the wax mold into the sand particles to allow the sand particles to adhere to the surface of the slurry. The particle size and material of sand particles will affect the strength and surface roughness of the shell. According to the process requirements, multiple coating and sanding operations may be required to form a shell with sufficient thickness and strength.

3. Drying and hardening

Dry and harden the wax mold after coating and sanding in a specific environment to solidify the adhesive in the shell and improve its strength and stability. The parameters such as drying and hardening time, temperature, and humidity need to be strictly controlled to ensure the quality of the shell.

Put the prepared shell into the steam dewaxing kettle, and use high-temperature steam to melt the wax mold and flow out of the shell. The dewaxing process should ensure that the wax mold is completely melted and discharged to avoid residual wax affecting the quality of subsequent casting. At the same time, it is necessary to control the temperature and time of dewaxing to prevent damage to the shell due to excessive temperature or time.

1. Melting of titanium alloy

Put the selected titanium alloy raw materials into a vacuum induction furnace for melting. During the melting process, it is necessary to strictly control the vacuum degree, temperature, and melting time inside the furnace to ensure the uniformity and purity of the composition of the titanium alloy. At the same time, it is necessary to prevent titanium alloys from reacting with oxygen, nitrogen, and other gases in the air during the melting process, which may affect the material properties.

2. Pouring

After the titanium alloy is melted to the specified temperature and composition requirements, it is quickly poured into the preheated shell. The pouring process should control the pouring speed and amount to avoid casting defects such as insufficient pouring and porosity. At the same time, it is necessary to ensure the stability of the shell during the pouring process and prevent the shell from cracking.

1. Cooling

After pouring, let the shell cool naturally or use appropriate cooling methods (such as air cooling, water cooling, etc.) to cool the casting. The cooling rate can affect the microstructure and properties of castings, so it is necessary to control the cooling rate according to the characteristics of titanium alloys and the design requirements of the Cato.

2. Cleaning

After cooling, break the shell and remove the casting. Then clean the casting to remove impurities such as residual shell and oxide scale on the surface. The cleaning process can use a combination of mechanical cleaning (such as sandblasting, polishing, etc.) and chemical cleaning (such as acid washing, etc.) to ensure that the surface of the casting is clean and smooth.

1. Heat treatment

Heat treat the cleaned card tray to improve its organizational structure and performance. The heat treatment process includes annealing, quenching, tempering, etc. The specific process parameters need to be determined according to the composition of the titanium alloy and the requirements for the use of the card holder. Heat treatment can improve the strength, hardness, and toughness of the card holder.

2. Surface treatment

In order to improve the appearance quality and corrosion resistance of the card tray, surface treatment can be carried out. Common surface treatment methods include electroplating, anodizing, spraying, etc. Surface treatment can not only improve the appearance of the card tray, but also enhance its wear resistance and corrosion resistance, extending the service life of the card tray.

1. Dimensional inspection

Use high-precision measuring tools (such as coordinate measuring instruments, calipers, etc.) to check the dimensions of the card tray to ensure that it meets the design requirements. Dimensional deviation can affect the compatibility between the card holder and the mobile phone, as well as the insertion and removal performance of the SIM card. Therefore, dimensional inspection is an important part of quality control.

2. Appearance inspection

By visual inspection or using microscopes and other equipment to examine the appearance of the card tray, check for defects such as cracks, sand holes, and pores. Appearance defects not only affect the aesthetics of the card tray, but may also affect its performance and service life.

3. Performance testing

Test the physical properties (such as hardness, strength, toughness, etc.) and chemical properties (such as corrosion resistance, etc.) of the Cato. Hardness testing, tensile testing, salt spray testing, and other methods can be used to ensure that the performance of the card holder meets the requirements for use.

Optimize the entire production process of Huawei mobile phone Cato titanium alloy wax casting to improve production efficiency and product quality. By arranging production processes reasonably, optimizing equipment layout, and adopting advanced production management methods (such as lean production, Six Sigma, etc.), waste and delays in the production process can be reduced, and production efficiency can be improved.

Establish a comprehensive quality assurance system and strictly control the quality of every link from raw material procurement, production process control to finished product inspection. Establish strict quality standards and inspection specifications, strengthen monitoring and management of the production process, and promptly identify and resolve quality issues. At the same time, provide quality training to employees to enhance their quality awareness and operational skills.

Regularly evaluate and analyze the production process and product quality, summarize lessons learned, identify existing problems and improvement directions. By continuously improving production processes, optimizing quality control methods, and other measures, we aim to continuously enhance the quality and production efficiency of Huawei mobile phone card holders, meeting market demand and customer requirements.