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Vacuum Casting Services

DEK offers high quality vacuum casting services for your specific application. We offer superior elastomeric materials for vacuum casting of complex plastic parts, and we can ensure that prototypes and small batches closely match the end-use product. In addition, we provide surface treatments such as bead blasting, painting, and polishing for strict quality control, fast delivery, and cost-effective production in small batches.

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Vacuum(Urethane) Casting Services for Prototypes or Custom Parts 

Vacuum Casting Prototype

Vacuum casting is a prototyping process that uses silicone molds to quickly create urethane cast parts for the production of small batches of functional parts.

For small batch manufacturing, polyurethane vacuum casting is a fast, cost-effective way to produce 10-200 production-quality parts. Typically, 20-25 castings can be produced per silicone mold.

DEK's polyurethane casting services are ideally suited for overmolding complex plastic parts with deliveries as fast as 7 days. We use a soft-mold approach to provide high-quality functional and end-use parts for low-volume production, allowing for virtually unlimited complexity, including sharp inside corners that are impossible to achieve with CNC machining, as well as designs with no pullout slopes or uniform wall thicknesses for injection molding.

  • Maximum accuracy of ±0.05 mm
  • Standard tolerances of ±0.15mm/100mm
  • Accommodates 2.0M*1.2M*1.0M mold sizes
  • Minimum wall thickness is 0.5mm, preferably 1.5mm~2.5mm
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Materials

Material Types for Vacuum Casting

DEK uses different plastics or soft rubbers to meet the needs of a variety of applications, including the aerospace, automotive, medical and electronics industries.

Soft Rubber
ABS
PMMA (acrylic)
Nylon
Polypropylene (PP)
Temperature Resistant Material
Flame Retardant Material
Soft Rubber

Soft rubber is widely used in daily life due to its excellent flexibility, high wear resistance and shock absorption. It is an ideal material for making products such as seals, shock absorbers and gaskets that need to withstand continuous bending and pressure.

Soft Rubber PU8400

Soft Rubber T0387

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Soft RubberSoft Rubber
ABS

With high strength, toughness, excellent impact resistance and dimensional stability, ABS is ideally suited for functional prototypes and rugged end-use parts in demanding applications, including appliance housings, automotive interior parts, headlight housings, electronics housings and medical device housings.

ABS PU8150

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PMMA (acrylic)

Known for its excellent optical transparency, impact resistance and good weathering properties, PMMA (acrylic) is suitable for a variety of processes and is often used as a replacement for glass. Ideal for automotive tail lights, monitor covers and advertising signage.

PMMA 1940

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PMMA Car Light Prototype
Nylon

With high mechanical strength, abrasion resistance, toughness and chemical resistance, nylon excels in applications that require durability and fatigue resistance, including gears, bearings and sports equipment.

Nylon Z2910

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Polypropylene (PP)

Polypropylene has good lightweight, chemical resistance, flexibility and abrasion resistance, and is often used for items that require both toughness and abrasion resistance, including automotive parts, storage containers and electronic equipment housings.

PP 5690

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PP Prototype
Temperature Resistant Material

With excellent heat resistance and mechanical strength, this material can withstand high temperatures without degradation, making it ideal for parts facing extreme heat in automotive, aerospace, electronics and industrial applications.

PX2017

PX223

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Temperature Resistant Material
Flame Retardant Material

Flame retardant materials with flame resistance, high thermal stability and self-extinguishing properties are critical for safety-critical applications to slow or stop the spread of fire and are commonly used in electronic housings, automotive components and aerospace parts.

Flame Retardant Material 8263

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Surface Finishing

Versatile Surface Finishing Options

Our finishing options provide you with an exceptional experience. We offer a variety of techniques to enhance the appearance and performance of a prototype or customized part.
more surface finishes

Tolerance Table

Dimension & Tolerance

Standards Description
Accuracy Highest precision to reach ±0.05 mm
Maximum Part Size +/- 0.025 mm
+/- 0.001 inch
Minimum Wall Thickness 1.5mm~2.5mm
Quantitites 20-25 copies per mold
Color and Finishing Color and texture can be customized
Typical Lead Time Up to 20 parts in 15 days or less
The tolerances listed here are minimum values for ideal conditions. Depending on material selection or part geometry, looser tolerances may be required.

Instant & Accurate Quotes

We will thoroughly review each drawing and provide accurate quotes.
CNC Machining Engineers

We don't use online automated quotation tools, because it is very inaccurate. Online quote platforms rely solely on calculations based on cutting amounts and fixed coefficients, they fail to account for actual processing nuances, such as material deformation after heat treatment, tight tolerance requirements, grinding after heat treatment, etc. Consequently, automated price calculations can lead to inaccuracies, ultimately increasing your costs.

But you can rest assured at DEK!

Our quotations are both cost-effective and accurate because we have a team of professional mechanical engineers who meticulously review each drawing. These engineers boast over 10 years of experience and possess deep expertise in programming, machine operation, post-processing, material properties, and more. Ensure you will get accurate quotes within 6 hours.

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PRODUCTION CAPACITY

Production Capacity Guarantee

With perfect production and quality process, you can place your order with confidence.

Production Capacity Guarantee

With a vacuum casting machine shop dedicated to the production of plastic parts, our skilled machinists combine decades of experience with the latest technology to produce exceptional prototypes and custom plastic parts quickly.

We manufacture high-fidelity prototypes to your exacting specifications using polyurethane resins that match your ideas, maintaining tight tolerances for complex designs

Quality Control

We follow a strict quality inspection process, starting with a thorough inspection of the appearance, checking the surface of the parts for obvious scratches, bubbles, flaking and other defects to ensure a smooth and even surface; measuring the dimensions of the parts using tools such as calipers, micrometers and other tools to ensure that they conform to the specifications of the design drawings.

Then, according to your needs, we conduct tests such as adhesion, film thickness, environmental resistance and functionality to ensure that the final product fully meets your end-use and quality requirements.

Professional Packaging

After wiping the parts, we package the products with plastic bags and bubble wrap depending on the size and characteristics of the parts. Then after sealing with tape, we label each package so you can quickly identify the contents.

Once the initial packaging is complete, we will pack it into a 5-layer corrugated cardboard box or wooden crate and secure it with pearl cotton or fill it with bubble wrap to prevent damage during transportation. We will also attach a packing slip to the outer box, which not only protects your parts, but also allows you to easily inspect and identify your shipment.

Global Shipping

We have extensive global transportation experience and have cooperated with many international transportation/express companies to ensure that you can receive the products cheaply and quickly.

When quoting, we will conduct a transportation assessment and give you a plan for you to choose:for small quantities, we will use UPS / DHL / TNT / FedEx international express or air transportation, and for large volume and weight, we will recommend you to ship by sea, truck, etc.

Our Advantages

2300+ Engineers Love Work With Us

Testimonials

Our Ordering Process

Different from the Internet quote platforms, we produce and complete all the details of your parts in our own factory. Each step is professional and reliable, ensuring you can rest assured.
1
Send RFQ

Send RFQ with 2D/3D drawings and detailed requirements via Email or online form.

2
Review & Quote

Our Engineer team will review every drawing carefully and provide an accurate quote within 6 hours.

3
Confirm Order

Confirm the quote, details and delivery schedule, then sign the contract.

4
Production

Arrange production process, start programming and machining.

5
Quality Control

Strict quality control during production and final inspection.

6
Packaging & Shipping

Pack the parts, attach part identification labels, and start shipping.

Send RFQ 222
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FAQ

DEK Vacuum Casting Service FAQs

Our vacuum casting services are known for their outstanding quality and short lead times. Our experienced technicians can quickly manufacture a prototype that meets your ideals. In addition, we can also provide surface treatments such as sandblasting and painting to further meet your needs.
Yes. To complement our vacuum casting services, our engineers can provide 24/7 service support geared toward manufacturing designs. In addition, we offer light assembly services to meet your needs.
Our production and quality control departments adhere to strict quality control procedures to ensure that the final part meets the highest quality standards. During the manufacturing process, we strictly control temperature, material ratios, humidity and other processing conditions to maintain part consistency.
Upload your part drawings on our website or send them by e-mail and inform us of the quantity, material, surface treatment and other specific requirements. We will reply to your message within 6 hours.

The main formats accepted are: PDF, STEP, STP, IGES, SLDPRT.
After the mold has cured, our technicians will cut it open and remove the master model and center a space with the exact dimensions of the master model.

The mold is then filled with the specified material and placed in order to create the product. After filling the mold with resin material, the mold is sealed with tape and staples and placed in a vacuum chamber. When placed in the vacuum chamber, it is important to make sure that there are no air bubbles in the mold to ensure that the final product will not be destroyed or damaged.

Get An Accurate Quote For Your Next Projects

No matter your project is complicated or simple, no matter is metal or plastic, you will get an accurate quotation within 6 hours.

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TECHNOLOGY OVERVIEW

Knowledge of Vacuum Casting

What is Vacuum Casting?

Vacuum casting, also known as silicone casting, is a fast, cost-effective alternative for producing small batches of injection molded parts. Usually 3D printed SLA parts are used as prototypes, while the molds are made of silicone material, and the specified material is poured to make the remolded parts through the process of vacuum injection molding. The manufacturing principle of vacuum casting is similar to injection molding in that a mold is used to replicate the same part, but the manufacturing process is very different.

The material and the silicone mold are placed into the vacuum laminating together. The vacuum low-pressure environment helps to eliminate air bubbles in the mold and ensures a smooth surface effect. Depending on the customer's requirements, technicians can perform other post-treatments on the parts, such as sandblasting, oil blasting, polishing and more.

How Vacuum Casting Works?

Making the Master Mold: First, make the master mold using CNC machining or 3D printing (SLA). The accuracy of the vacuum manufactured part depends a lot on the master mold, so you can choose to polish or sand the surface to make the master mold more precise

Making the Silicone Mold: After completing and checking the master mold, we will start making the silicone mold. The master is placed in a casting box, liquid silicone is poured to fill the casting box, and then the unit is placed in an oven preheated to 40°C to cure for 10-16 hours. After drying, the silicone molds are carefully removed by cutting with a knife. If it is difficult to remove the mold, a mold release agent can be used.

Vacuum Pouring: Finally, liquid polyurethane or silicone is poured into the silicone molds, which are then placed in the chamber to help remove air bubbles from the liquid material. Once cured, the silicone halves are separated and the newly formed portion is removed. Silicone molds are usually suitable for making about 20 copies of a master mold.

Advantages of Vacuum Casting

High Efficiency: It can produce prototypes or small-lot products quickly and effectively, eliminating the time for mold opening, shortening the product development cycle, and greatly improving production efficiency.

High Precision: It can highly restore the details and dimensions of the product, and produce high-precision prototypes or small-lot products, which is conducive to subsequent production and quality control.

Low Cost: It uses relatively affordable raw materials and can be reused, and processing costs are much lower than CNC machining and 3D printing.

Flexibility: It can be flexibly adjusted for different product requirements and production needs, process parameters and production programs, adaptability.

Environmental Protection: The raw materials used in the silicone lamination process are non-toxic and odorless, and the production process does not produce harmful substances, in line with environmental requirements.

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