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Urethane Casting

Urethane casting is a soft-tooling manufacturing method used to produce small quantities

of high-quality plastic, rubber and silicone parts. It relies on silicone molds, which are quick

to make and inexpensive, allowing detailed components to be created efficiently.

This process is far more affordable than injection molding because it avoids the need for

costly machined metal molds. The molds also support a range of high-performance

materials that closely mimic those found in commercial products.

As a result, urethane casting is widely used for producing functional and cosmetic prototypes

in limited quantities. And also serves as a practical option for low-volume production.

What Is Urethane Casting?

What Is the Process of Urethane Casting？

First,a master pattern is designed using CAD software to establish the exact geometry

and surface details of the final part.This pattern is then manufacetured,typically throgh

CNC machining,to ensure high accuracy and a smooth finish that will transfer cleanly to

the mold.

Second,The completed master pattern is placed in a mold box and surrounded with liquid

silicone,which flows around every contour to capture fine details.After the silicone fully

cures,the mold is carefully cut open and the master pattern is removed,leaving behind a

precise cavity that will shape the cast urethane part.

Third,Liquid urethane is poured or injected into the silicone mold cavity and allowed to

cure,forming a solid part that replicates the master pattern.Once cured,the part is removed

from the mold,and the mold can be reused repeatedly to produce addlitional components.

▶ Low upfront cost, no expensive hard steel mold required. ▶ Fast lead time: Parts be finished in 4-7 waoking days. ▶ Ideal for low-volume production & prototype validation. ▶ Flexible material options: simulate PP, ABS, PC, rubber, transparent

or soft-touch material. ▶ Easy to modify the master pattern; low cost for design changes. ▶ Can insert inserts (metal, screw, logo part) directly during casting. ▶ Small minimum order quantity (MOQ), supports trial orders. ▶ Good surface finish, can achieve painting, printing, texture...

Advantages / Disadvantages

Why Choose Urethane Molding?

Advantages

Urethane casting is perfect for prototypes and low-volume trial runs,and Urethane casting

can be used to quickly produce prototype parts that mimic the look and feel of injection

molding, before committing to tooling.

Disadvantages

▶Limited mold lifespan. Silicone soft mold wears quickly, not suitable

for mass production. ▶ Higher unit cost compared with injection molding when quantity

grows. ▶ It is a manual, labor-intensive process, not fully automatic. ▶ Dimensional tolerance is not as tight as injection molding; slight

shrinkage & warpage may happen during resin curing.

▶ PU resin only simulates thermoplastics (ABS / PC / PP etc.), not

identical to real injection plastic in chemical resistance and long-term

aging performance. ▶ Each casting cycle takes long curing time, low daily output.

CONTACT US

Intronics (Shenzhen) Technology Development Co., Ltd

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Room 305, Building 2, No.37 Ansheng Road, Bao'an District, Shenzhen City, Guangdong Province, China

Sales@Intronics-td.com

Tel : 0086 0755-81775761 WhatsApp: 18300044610

Intronics Technology Development Co., Ltd

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FLAT 13B, GOLD SHINE TOWER, NO.346-348 QUEEN'S RD CENTRAL,SHEUNG WAN, HONG KONG

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Intronics (Shenzhen) Technology Development Co., Ltd

Injection Mold & Molding