Industrial news
Hasung is a Professional Precious Metals Casting And Melting Machines Manufacturer since 2019.
Language
Hasung is a Professional Precious Metals Casting And Melting Machines Manufacturer since 2019.
In today's jewelry consumer market that pursues personalization and unique design, complex and exquisite styles are increasingly favored. As a powerful assistant to many jewelry craftsmen and small studios, the ability of small jewelry casting machines to accurately create complex styles has become a focus of attention in the industry. This not only relates to the perfect presentation of the creator's design concept, but also affects the competitiveness of the product in the market.
Working principle and technical characteristics of small jewelry casting machine
Small jewelry casting machines often use induction heating technology. Taking a small medium frequency melting furnace as an example, the medium frequency power supply outputs medium frequency AC power ranging from several hundred hertz to several thousand hertz. The current passes through an induction coil made of copper or aluminum, generating an alternating magnetic field. When the metal material placed in the crucible is in this magnetic field, induced current will be generated due to eddy current effect. The current flows inside the metal and generates heat due to resistance, causing the metal to rapidly heat up until melting.
This heating method has high efficiency and can quickly heat the metal to its melting point, improving production efficiency. Moreover, by precisely adjusting the heating parameters, uniform heating of metal materials can be achieved, reducing the risk of local overheating or insufficient heating.
Some advanced small jewelry casting machines are also equipped with intelligent control systems, such as Siemens PLC control systems, which not only make operation safer and more convenient, but also accurately control temperature readings with an accuracy of ± 2 ° C. In the casting process, some machines have vacuum pressurization function, which injects inert gas during melting, isolates oxygen, prevents oxidation of precious metal castings, and makes the surface of castings free of pores and shrinkage, with high density.
Key factors affecting the accuracy of small jewelry casting machines
（1）Mold quality and adaptability
Mold is a crucial factor in determining the precision of casting styles. For complex styles, the design and production of molds must be extremely precise. High precision 3D printing molds or wax lost casting molds can replicate complex details, but the thermal expansion coefficient of the mold material needs to match the casting metal. If the difference in thermal expansion coefficient is too large, during the heating and cooling process, the shrinkage or expansion of the mold and the casting will be inconsistent, which will lead to dimensional deviation and blurred details of the casting. For example, when casting jewelry with intricate hollow patterns, even slight deformations in the mold may cause the edges of the patterns to become unclear or break.
（2）Characteristics of Metal Materials
The flowability, shrinkage rate, and other characteristics of different metal materials have a significant impact on casting accuracy. Precious metals such as gold and silver have good fluidity and can fill complex cavities in molds well, but their shrinkage rate is also relatively high. During the cooling and solidification process, the volume of the metal shrinks. If the estimated amount of shrinkage is not accurate, it will cause the casting size to be smaller than expected. Some alloy materials, even slight differences in composition, may alter their physical properties and affect the casting effect. For example, a specific proportion of copper zinc alloy is used to cast complex antique style carved jewelry. If the zinc content in the alloy fluctuates, it may cause changes in material fluidity, resulting in incomplete filling of the carved parts.
（3）Control of Casting Process Parameters
Accurate control of casting process parameters such as temperature, casting speed, and cooling time is crucial. If the temperature is too high, the metal liquid may oxidize excessively and have strong fluidity, which may wash the surface of the mold, damage the details of the mold, and generate significant stress during the cooling of the casting, leading to deformation or cracking; If the temperature is too low, the flowability of the metal liquid is poor and it cannot completely fill the mold cavity.
If the casting speed is too fast, the air in the mold cavity cannot be discharged in time, which can easily form pores inside the casting; Slow casting speed and premature cooling of the molten metal during the flow process can also cause insufficient filling. If the cooling time is not properly controlled, the internal structure of the casting will be uneven, which will also affect the dimensional accuracy and surface quality.
Practical performance case of small jewelry casting machine in complex style creation
In some small jewelry studios, advanced technology equipped small jewelry casting machines are successfully used to create stunning complex styles of jewelry. For example, a silver pendant inspired by ancient Celtic knots, with interwoven lines and intricate patterns accurately presented through a small vacuum pressure casting machine. The vacuum environment of the casting machine effectively avoids oxidation of the silver liquid, and precise temperature control ensures that the silver liquid flows just right, evenly filling every detail of the mold. The final product has smooth lines and clear patterns, almost identical to the design draft.
However, there are also cases of challenges and shortcomings. A creator attempted to cast a multi-layered nested gold jewelry with rotating parts. Despite using high-precision molds, the final product showed slight deformation due to the high shrinkage rate of gold and the complex stress changes of the multi-layered structure during cooling. The fitting of the rotating parts was not precise enough, which affected the overall effect. This indicates that small jewelry casting machines still need to continuously explore process optimization and technological improvement when facing extremely complex styles that require high structural accuracy.
Small jewelry casting machines have certain capabilities in accurately creating complex styles, and their performance continues to improve with technological advancements. Through high-quality molds, compatible materials, and precise process parameter control, it is possible to achieve high-quality casting of numerous complex designs. However, it cannot be denied that there are still limitations when dealing with styles that require extremely complex structures and high precision.
In the future, with the coordinated development of materials science, mold manufacturing technology, and casting processes, small jewelry casting machines are expected to achieve greater breakthroughs in the field of complex style creation, bringing more possibilities for jewelry creation and helping the industry reach new heights.
You can contact us through the following ways：
Whatsapp: 008617898439424
Email: sales@hasungmachinery.com
Web: www.hasungmachinery.com www.hasungcasting.com
Shenzhen Hasung Precious Metals Equipment Technology Co., Ltd. is a mechanical engineering company located in the south of China, in the beautiful and the most fastest economic growing city, Shenzhen. The company is a technological leader in the area of heating and casting equipment for the precious metals and new materials industry.
Our strong knowledge in vacuum casting technology further enables us to serve industrial customers to cast high-alloyed steel, high vacuum required platinum-rhodium alloy, gold and silver, etc.
