HS
Huasheng Precision
Dongguan · Est. 2009
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Vacuum Casting / Urethane Casting

Injection-Mold Quality Parts, Without the Steel Tool.

Get 10–50 production-quality parts in 7–10 days using silicone tooling and urethane resins. Perfect for design validation, marketing samples, and bridge-to-production when your steel tool isn't ready.

  • ▸Production-grade surface finish — paint, texture, and silk screen ready
  • ▸Materials that mimic ABS, PC, PMMA, rubber, clear, and high-temp plastics
  • ▸Overmolding and insert molding supported (metal inserts, TPU over rigid)
  • ▸Parts up to 2 m — we have two Fupu V2500 vacuum casting machines
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Fupu V2550 vacuum casting machine at Huasheng
In the shop

Real parts, real machines.

Selected work from our Dongguan floor across recent customer projects.

Large transparent vacuum cast part
Large-format clear urethane casting — automotive interior
Vacuum cast game controller
Consumer electronics — game controller + CMF samples
SLA rapid prototype parts
SLA masters before silicone tooling
Materials

Materials we machine

All common engineering plastics and metals, including automotive high-strength steels and aerospace-grade aluminums.

ABS-like (rigid, opaque)
PC-like (clear, high-impact)
PMMA-like (optical clear)
PP-like (flexible, living hinges)
Nylon-like (PA6, wear resistant)
Rubber-like (Shore 30A – 90A)
High-temp (up to 150 °C)
Flame-retardant (UL 94 V-0)
FDA food-safe grades
Glass-filled (for stiffness)
See full material list →
Finishing

Surface finishes available

As-Cast (Matte)Painted (solid colors)Painted (textured)Clear-coatedSilk ScreenPad PrintingSoft-touch coatingColor-through (pigmented resin)
Design

Design guidelines

Follow these rules for optimal cost and lead time. Our engineers flag any DFM issues during quote review.

01
Draft Angles

1° draft per side minimum on vertical walls. Silicone tools are more forgiving than steel, but 2° is safer for deep features.

02
Wall Thickness

Uniform 1.5–3 mm ideal. Variations cause sink marks and warp. Avoid walls thinner than 0.75 mm — they'll flex or tear during demolding.

03
Texture

Texture is transferred from the master. Provide a masterwith the target surface, or let us apply VDI / Mold-Tech texture after CNC.

04
Color

Pigments mixed into resin, no painting needed for solid colors. Provide a Pantone number or color chip. Color matching available for ±1 Delta-E.

05
Inserts & Overmolding

Metal inserts (brass, stainless) placed before casting and locked in. For overmolding, supply the rigid substrate (injection molded or CNC) and we cast the soft part around it.

06
Tolerance Expectations

Vacuum cast parts typically hold ±0.15 mm or ±0.3% (whichever is greater). Don't specify tighter without discussion — we may recommend CNC for critical features.

How it works

From drawing to part

  1. 01
    CNC or SLA master pattern (typically aluminum or high-res SLA resin)
  2. 02
    Silicone mold poured around master, cured, and cut in half
  3. 03
    Resin mixed, degassed under vacuum, and poured into silicone tool
  4. 04
    Part cured in oven (30–60 min depending on resin)
  5. 05
    Part demolded, trimmed, finished, and inspected
Applications

Industries served

Consumer ElectronicsMedical Device PrototypingAutomotive Interior PrototypesAppliance DevelopmentMarketing SamplesPre-Launch Batches
FAQ

Frequently asked questions

Q01How is vacuum casting different from injection molding?+
Vacuum casting uses a soft silicone tool (lasts ~20 parts) instead of a steel tool (lasts 100,000+ parts). Tooling costs $1,000–3,000 vs $20,000+ for steel. Ideal for 10–50 parts; anything over 100 pieces, consider rapid injection molding.
Q02Can vacuum cast parts actually replace injection molded parts for small runs?+
For most consumer product applications, yes. Mechanical properties are close to their injection-molded equivalents (±10%), surface finish can match, and they accept paint and silk screen the same way. The limits are: higher per-part cost, ±0.15 mm tolerance (vs ±0.05 mm for IM), and 20–25 parts per mold.
Q03Do you support clear parts?+
Yes. We use PC-like and PMMA-like optical clear resins. For best clarity, the master must be polished to a glass-like finish, and we use a special degassing process to eliminate micro-bubbles.
Q04What about overmolding — TPU over ABS for grips?+
Overmolding is a specialty of ours. Provide the rigid substrate (or we'll make it), and we'll cast the soft TPU or rubber-like resin over it. Bond strength depends on substrate prep and resin compatibility — we'll advise on the best pairing.
Q05Can I get production-level textures?+
Yes. Texture transfers from the master surface. Either provide a textured master, or we'll apply VDI 3400 or Mold-Tech textures to the CNC master before silicone pouring.
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