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Our Services
Low Volume, Durable Parts with Production-Level Quality
Vacuum Casting
Vacuum casting is similar to injection molding in that it requires a tool with a cavity in the shape of the final part. The major difference is that vacuum casting uses a "soft" mold made of silicone whereas injection molding using a "hard" metal mold that has been CNC machined. The drawback to Vacuum casting, then, is that the mold wears out more quickly. However, it is vastly more cost-efficient for low-volume and prototype plastic parts that require production-level quality and surface finishes.
1.The Master Pattern: In step one, a master pattern of the final part is made using an additive manufacturing process.
2.Molding: In step two, the 3D printed master pattern is encased in liquid silicone that cures around the pattern, with the silicone encapsulating all the features of the printed parts.
3.Pouring: In the final step of the vacuum casting process, liquid urethane or silicone is poured into the silicone mold, and the mold is then placed in a chamber to help remove air bubbles in the liquid material.
Advantages of Vacuum Casting
Production Quality at Low Volumes
This process is a quick, cost-effective way to produce 10-200 units with production-level quality. Typically, each silicone mold will produce 20 castings.
Complex Elastomeric Parts
Vacuum casting is ideal for prototyping elastomeric parts such as complex gaskets and overmolds on rigid parts.
High Level of Detail
Vacuum casting allows for almost limitless complexity, including sharp internal corners unachievable with CNC machining, and designs without draft or uniform wall-thickness that can’t be injection molded.
Vacuum casting materials
ABS-Like
Opaque Elastomer
Acrylic-Like
Waterclear Elastomer
Post Processing For Vacuum Casting
Surface finishes can serve either a functional or aesthetic purpose. Surface finishes that serve both purposes are deemed cosmetic finishes, and are used for cosmetic parts. Producing cosmetic parts requires additional measures to minimize defects such as hang marks and scratches from tools.
√ Polishing
√ Sandblasting
√ Powder Coating
√ Painting
High quality parts every time
Precision products machining
From factory audits to part inspections, we follow strict processes to ensure your parts always meet the highest quality standards.
IP protection
We take every measure to ensure the protection of your IP, which is why 27% of Fortune 500 companies trust us with their projects.
Certifications
Our manufacturing partners have all the necessary certifications for your project's needs (ISO 9001, ISO 14001, IATF 16949, ISO 27001).
TESTIMONIALS
Amazing experience. All the expectations fulfilled. Exceptional quality and surface finish. Lead time faster than initially stated.
During the process, we used HLHs capabilities to 3D print many prototypes. That meant we had the option to iterate very quickly, print objects, and test them to see if they were working correctly in terms of complexity, or too much complexity.
HLH has always given us exactly what we needed. We’ve received parts with holes in the right places, with the right finish, and on time. Their user-friendly website means faster turnaround.
Our ordering process
1
Request a quote
Securely upload your part designs to our platform
2
Confirm specifications
Configure your part specifications and choose a delivery time that fits your schedule
3
Production
We select the best manufacturer for your order and start production immediately
4
QC
We take full responsibility for ensuring your parts are manufactured to our standards
5
Deliver goods
We handle all order logistics and communications, making sure your parts arrive on time.
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