Casting Technician - Jewelry

Job Summary

We are seeking a detail-oriented and skilled Jewelry Casting Technician to join our manufacturing team. In this role, you will be responsible for transforming wax designs and resin prototypes into high-quality precious metal jewelry pieces. You will oversee the entire lost-wax casting process—from assembling wax trees to operating burnout kilns and casting machinery.

Core Responsibilities

• Wax Tree Assembly: Inspect wax models and 3D resin prints for any flaws, then carefully solder them onto a central sprue to create clean, efficient casting trees.
• Flask Preparation & Investing: Weigh and mix investment powder and water to the correct ratios. Pour the mixture over the wax trees inside casting flasks, using a vacuum machine to remove all air bubbles.
• Burnout Kiln Operation: Load flasks into burnout ovens and program the correct temperature cycles to melt out the wax completely and cure the plaster molds.
• Metal Melting & Casting: Measure out precious metals and alloys (like gold and silver). Safely operate casting machinery to melt and pour the metal into hot flasks.
• De-vesting & Cleaning: Remove the hardened plaster from the cast trees using water pressure or chemical baths. Clip the individual jewelry pieces off the metal tree and clean them in an ultrasonic tank.
• Quality Control: Inspect finished raw castings for issues like air bubbles, incomplete fills, or surface roughness, and report any problems to supervisors.
• Equipment Maintenance: Perform basic maintenance on kilns, vacuum pumps, and casting torches. Keep the casting area clean and strictly follow safety rules for handling hot metal and chemicals.

Required Skills & Qualifications

• Experience: 1 to 3+ years of hands-on experience working with lost-wax casting in a jewelry manufacturing or studio environment.

• Technical Knowledge: A clear understanding of melting points, temperature settings, and how different metals behave during casting.

• Tool Proficiency: Experience using vacuum investing equipment, programmable burnout ovens, and centrifugal or vacuum casting machines.

• Detail-Oriented: Great eyesight and a steady hand to catch tiny defects in wax models before they are cast, preventing metal waste.

• Physical Fitness: Ability to stand for long stretches, work carefully around high-heat machinery, and lift heavy casting flasks safely.

• Basic bench skills, such as using a saw, filing, or magnetic tumbling to help prepare raw castings for the polishing team.

• Experience working with 3D-printed resin models and knowing how to adjust burnout times for resin vs. standard wax.

To apply for this position, please simply click on the “APPLY” button or send your full resume in Word format to [email protected] indicating the job title.

If you are not contacted by our consultants within 2 weeks, please consider your application unsuccessful. All applications will be treated in strict confidence and used for recruitment purposes only in accordance with PERSOL Hong Kong Limited’s Privacy Policy.

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