Silicone Rubber Parts

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Seals for different areas of application

O-ring seal is waterproof, dustproof and high temperature resistant

Flat gasket seal

Automotive air conditioning industry seals

Silicone Rubber Molded Parts

LSAN supplys moulded components manufactured using a range of silicone rubber material types.  Solid silicone rubber mouldings are generally bespoke shapes often with complex profiles, a ribbed/textured finish or may require a lip or curved edge – for these reasons mouldings can not simply be pressed from sheet material and require specialist machinery.  

All our Silicone Rubber Mouldings are made to order and are produced using a combination of  samples or drawings provided by our customers, from which a tool or moulded cavity can be  made.  Silicone rubber mouldings can be taken in an endless number  forms including feet, buttons, housings and cases, , screws, combs, tubes and o-rings to name a few, all designed to provide protection,  prevent the leakage or ingress of air, fluid or gas and to be aesthetically pleasing.

Silicone molds not only have the advantage of producing various shapes and sizes, but also can meet the special requirements of customers, such as color, material, etc., to meet the needs of different customers for various standards.

Product Specification & Key Characteristics

Colour

Black, translucent, white, red, blue

Shore Hardness

Available in 20° - 80° shore

Temperature

-40℃ to +200°C (230°C intermittent)

Resistances

UV, oxidation, ozone, weathering, corona discharge, radiation

Applications

Used in a multitude of industries including automotive, catering (food & drink), electronics, pharmaceutical, insulation

What are Silicone Rubber Mouldings?

Silicone (SI) rubber mouldings are produced using raw molten rubber compound and a mould or ‘die’ in which the rubber profile is formed and cured (set).  Silicone (SI) rubber mouldings are available in a range of grades, hardnesses and colours, each with its own set of characteristics,  properties and resistances to suit different exposures and environments – each produced using one of the techniques below:

INJECTION MOULDING
Injection moulding is the process by which raw/uncured rubber material is loaded into a hopper or holding unit where it is heated to a molten state and then fed through a nozzle in pre-measured quantities into the mould/cavity. Pressure and heat levels are adjusted within the cavity causing the material to ‘cure’ and the moulded product is formed.
COMPRESSION MOULDING
Compression moulding is made up of a top and bottom pre-heated steel mould/cavity into which raw material is poured in and the two halves are closed together. This tool is heated in order to melt the neoprene compound creating the desired shape and the final product. Although this process is great for bespoke moulding, it can be very time consuming for high volume production.
TRANSFER MOULDING
The transfer moulding process is the more complex of the three. The raw/uncured material or charge is loaded into the transfer pot, this pot is then heated as a plunger slowly enters the pot building pressure, forcing the melted rubber through the sprue or channel. The sprue leads to the mould cavity, this cavity is then filled with the melted rubber material forming the desired shape of the component. Once the raw material has cured, the moulding too can be opened and the formed part removed.

Why Use Silicone Rubber Mouldings?

Advantages of Using Silicone Mouldings

Customers often choose silicone rubber mouldings as the material has a list of excellent characteristics and features, silicone rubber has a broad working temperature range of  (-40℃ to +200°C) for use in hot and cold environments, with high temperature versions also available for extreme heat.

Silicone rubber mouldings are resistant to ozone, weathering, sea water, many chemicals and  fungal growth, they also offer excellent tensile strength, tear resistance and electrical insulating properties.

Solid silicone rubber mouldings are available in a range of colours and hardnesses (the shore hardness is measured using a shore durometer which indicates  the level of resistance to indentation ,the higher number on the scale indicate a greater resistance – harder the material/lower number indicate less resistance- softer the material).  The material is also manufactured in different grades which add extra properties for use in specific applications such as high temperatures, food and flame retardancy.

Different Grades

Advanced Seals & Gaskets Ltd have a network of material manufacturers and suppliers, giving our customers more choice when looking for moulded silicone products, our most popular grades being:

High Temperature Silicone

FDA approved and suitable for working conditions up to 300°C

FDA Approved Silicone

all general purpose silicone are certified for use within food, drink & pharmaceutical applications

Metal Detectable Silicone

used to detect metal fragments

Fluorosilicone

this material offers the same mechanical properties as standard silicone, but with an improved fuel and mineral oil resistance.

Platinum cured Silicone

this non-yellowing translucent material offers a high tear strength and does not produce any peroxides or ketones.

Conductive Silicone

is a carbon filled silicone which conducts a low electrical amperage

Flame retardant

offers a more superior flame retardance, meeting the following standard for railways BS6853 Cat1A and French Norm NFF 16-101 (now superseded by TS EN 45545-2)

Benefits of Using Silicone Mouldings