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Highly Accurate Vacuum Casting Services Polyurethane Prototype Parts Low Volume

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Highly Accurate Vacuum Casting Services Polyurethane Prototype Parts Low Volume

Certification : ISO 9001:2015
Place of Origin : Shenzhen, China
MOQ : 1 pieces
Payment Terms : T/T, Western Union,Paypal
Supply Ability : 10000 pieces
Delivery Time : 3-8 working days
Packaging Details : Carton
Maximum casting weight : 1400 g
Maximum mould size : 450 x 470 x 400 mm
Largest Turning Diameter : 1000 Mm
Smallest Turning Diameter : 2 Mm
Tolerance : 0.01 Mm
Finishing Process : Painting, Spraying, Anodizing, Polishing, Powder Coating...etc
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The Vacuum Casting Process

Vacuum Casting is typically used to produce small numbers (usually up to 20) of highly accurate polyurethane prototype parts.

It is a slightly slower process than SLA alone because of the additional steps involved in the process, some of which are manually intensive. The time to manufacture depends on the desired characteristics of the part, with size being a key factor as this affects the curing time of the material.

Parts are made from a single master mould, which is itself made using an SLA master model. The mould is made from silicone rubber, and the casting made by pouring resin into the mould in a vacuum chamber.

The result is high quality bubble free casting with blemish free surface texture.


When to use Vacuum Casting

Vacuum Casting is ideal when highly accurate, functional plastic prototype parts in very fine detail are required.

The process can replicate patterns, dimensions, profiles and textures, and as such is widely used for produce parts for:

  • functional testing such as thermal and air flow testing
  • assembly line trials
  • marketing purposes e.g. presentations and trade shows.

Silicone Tooling


Silicone tools have a limited production life. The number of parts that can be produced from a single silicone tool depends on one or two factors (and often both):

#1 – The polyurethane (PU) material used, and

#2 – The geometry of the part being produced

A silicone tool running a general PU material simulating ABS will on average yield 20-25 parts; a flexible material in the lower Shore A range will yield 25-30 parts; and a material with a filled content will yield around 10 parts, but could be a low as 5.

The geometry aspect is down to the part detail, normally within the “B” surface where clip features exist, which can cause the tool to degrade.

Some inserts may be required to hold certain features and will affect price and lead time.

Plastic material simulation


    • ABS
    • POM
    • Elastomers (Range: 25 – 95 Shore A)
    • Nylon including glass filled
    • Polypropylene

Vacuum Casting Benefits

As well as being a highly effective method for producing small numbers of good quality accurate polyurethane prototype parts, Vacuum Casting can also deliver parts with varying degrees of flexibility or rigidity, in a wide range of colours and materials – as well clear parts. Used in conjunction with other prototyping technologies, vacuum Casting obviates the requirement for expensive purpose made production tooling.

In summary:

    • Ideal for functional testing and/or marketing
    • Cost effective
    • Low volume runs
    • High quality
    • Fine detail and accuracy
    • Range of properties can be achieved to mimic the final product
    • No requirement for expensive hard tooling.

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