OEM rapid prototyping silicone rubber mold vacuum casting
polyurethane castings
What Is Vacuum Casting Or Urethane Casting?
Vacuum casting or urethane casting is a process that involves
pouring urethane resin into a space between two silicone mold
halves. Using a vacuum chamber to extract air from the mold during
the vacuum casting technique helps guarantee that the object takes
on the correct shape.
This vacuum casting technique is often used to make rubber and
plastic items. Since urethane molding can be quicker and less
expensive than other techniques like injection molding, it often
finds use in prototyping projects or small-scale production runs.
The procedure creates high-quality, bubble-free castings with a
flawless, smoothly textured surface since it is done under vacuum.
Application and Advantage:
Short lead times
| Silicone Vacuum casting tooling will be finished within 5-8 days；
|
Low tooling cost
| Liquid Silicone is used to build the vacuum casting tooling. it is
very low-cost than steel plastic injection mold;
|
End-use Application
| Silicone Vacuum casting systems produce high-quality parts that
closely replicate the performance attributes of injection moulded
parts;
|
Speed to market
| Best solutions for developing products, fast turnaround to change
the RTV silicone mold to meet market demands in various industries
including medical, consumer electronics, automotive.
|
There are some differences:
In injection molding, molten polymer is pushed into the mold cavity
under high pressure and high temperature using a hopper and lead
screw. Vacuum casting operates at low temperatures. Instead of
molten plastic, it works with liquid resins that are drawn into the
mold under a vacuum, much like the capillary action inside a plant
stem. So while there are many different resins available to mimic
various polymers, prototyping in the final injection-molded
material is not possible.
|
After oven-curing, parts still undergo some post-curing for up to a
week and remain vulnerable to UV radiation and high temperatures.
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Because the mold is flexible, there are limits to part size and
shape. Still, there are specific techniques to enable exceptions.
For example, phased casting is the use of metal supports to
counteract gravity for casting elongated parts in a three or
four-part mold.
|
Vacuum casting handles variable wall thickness better than
injection molding, because there is no heating-cooling cycle of the
cast material. This results in less part distortion.
|
A silicone mold allows for significant undercuts in the part
design. However, when testing for injection molding, it’s
recommended to stick to the injection molded design as much as
possible and build in the required draft angles of the final
product.
|
Vacuum casting results in nearly zero waste, whereas in injection
molding up to 20% of the used polymer is lost due to scrap rates,
residues, and overproduction.
|
Vacuum Urethane Casting
In this step, the original master pattern is replicated through
casting in a vacuum chamber. First, the mold is taped to a wooden
board and vent straws plus a pouring funnel are added to it.
The two-component resin is measured and mixed with a coloring agent
for pigmentation. Then, the casting material is degassed in a
vacuum chamber for a few minutes.
The polyurethane blend is now ready for pouring. The riser straws
will indicate when the cavity is completely filled up. After curing
at 70˚C, the mold is opened to reveal a carbon copy of the original
model with all details and surface textures preserved.
The finalization consists of trimming the edges of flash material,
an extra polishing cycle with 1000-grit sandpaper, and oven-curing
to improve
the part’s material properties.
Our Vacuum Casting Services
Experience high-quality production parts with Vacuum Casting, also
known as Urethane or Polyurethane casting.
At JYH, we offer a vast selection of plastic materials and can cast
parts ranging from small headphones to large 2-meter car bumpers.
Skip the lengthy lead times and tooling costs – choose Vacuum
Casting for efficient solutions.
Our Capabilities
|
Description |
Maximum build size
|
1.9 x 1.6 x 1.5 m |
Typical mould life |
15 – 25 parts
|
Materials
|
Wide range of thermoplastics, rubbers, transparent resins, etc.
|
Lead time
|
From as fast as 5 days |
Why Choose JYH- precision for Vacuum Casting Rapid Prototyping Services?
In the realm of vacuum casting, a multitude of manufacturers are
available for selection. Opting for the correct one holds
paramount importance to achieve your anticipated outcomes.
- Outstanding Quality and Rapid Performance
At JYH Precision, we believe that quality and speed should go hand
in hand. Our approach combines extensive industry expertise with
cutting-edge tools and technologies, enabling us to provide
top-notch vacuum casting services within tight timelines (usually 5
to 7 days). | - Enhancing Your Product with Finishing Services
Vacuum casting is just a part of our capabilities. we provide an
array of supplementary finishing services that contribute to
bringing your product to its full potential. These services
encompass machining, media blasting, printing, painting, and
beyond. |
- Smart Quotes Tailored to Your Every Project
We recognize that your requirements are distinct, and unnecessary
expenses are undesirable. Hence, we refrain from imposing minimum
order volumes or dollar values for our vacuum casting services. we
ensure swift and precise quotes within 1 hours or less for almost
all projects. | - Supporting Design for Manufacturing and Remote Flexibility
Vacuum casting is frequently utilized for prototyping, we
understand that many of the products . To facilitate their
refinement, we extend comprehensive design for manufacturing
assistance to our clients.
|
Features
| Urethane Casting
| 3D printing
|
| Surface Quality | The product surface is smooth and even, suitable for products with
high appearance requirements
| Product surfaces often show signs of lamination, suitable for
non-structural parts and prototyping
|
| Production batch | Suitable for small and medium batch production with low cost
| More suitable for small-scale production and personalized
customization
|
| Precision and detail | Higher accuracy and detail for manufacturing precision parts and
models
| Relatively low precision and detail, suitable for simpler
structures and rapid prototyping
|
FAQ:
Q1:Where can I get product&price information?
A1:Kindly send us e-mail or just feel free to contact us, we are
very glad to help.
Q2: How soon can I get samples?
A2: Depending on your specific project, it usually takes 7 to 15
days.
Q3:How to enjoy the OEM services?
A3:Usually, base on your design 3D drawings or original samples, we
will offer technical proposals and a quotation to you, after your
agreement, we arrange the production for you.
Is it possible to know how are my products going on without
visiting your company?
A4: We will offer a detailed production schedule and send reports
with digital pictures and videos which show the machining progress
as you need.And surly we can share our progress through online
ways.
Shipping way:
QC checking before ship the product:
Payment term:
After service:
Our workshop
Package method:
Vacuum Casting Rapid Prototyping Of Small Production Runs For ABS
Polyurethanes,JYH is your best injection mold supplier!
Injection Moulding is highly repeatab.
