We are a leading UK rubber moulding company making rubber products for industry worldwide.
We have produced rubber mouldings to meet customer requirements for over 45 years. Because of this, we are specialists in the design and manufacture of rubber components. Consequently, customers in all industries such as the transport, agriculture, offshore and defence sectors use products made by us.
Our team work with clients at all stages of the process from concept to production to ensure we supply a dependable and cost effective solution.
To maintain a quality product and service we put quality at the heart of our processes. Our quality management system is therefore certified to ISO9001.
We make all mould tools and inserts in-house. As a result, our prices and lead times for tooling are very competitive.
Moulded rubber products are made by applying heat and pressure to an uncured rubber material in a mould. This process will induce vulcanisation of the compound whilst the rubber material forms the shape of the mould tool cavity. At Clifton Rubber we have a diverse mix of hydraulic presses. As a result, we can make components using any of the three primary moulding processes – compression, transfer and injection.
This capacity mix gives us the flexibility required to make a broad range of rubber products. These can be small parts up to very large parts and one off prototypes through to high volume continuous production.
Click a button below to learn more about the moulding processes.
Compression moulding is the most widely used moulding technique due to its simplicity compared to transfer and injection moulding. The process involves placing a preformed blank of uncured rubber compound in the centre of a mould cavity. The mould is then closed before heat and pressure applied to the compound to induce the vulcanisation reaction. During this vulcanisation process the compound will take the form of the cavity resulting in an end product which meets the specific shape required. Once the material has fully vulcanised the mould is opened and the product removed.Compression moulding is generally suitable for low – medium production volumes where the shape of the end product is relatively simple. It is also the most suitable method when the size of the product is fairly large and requires a long cure time.
Clifton Rubber has been compression moulding products of all shapes and sizes for over 40 years, popular items being rubber blocks, rubber bushes, rubber grommets etc.
Transfer moulding uses similar equipment to compression moulding. The major difference between the two processes is that the mould tool is more complex in design. The transfer moulding process requires a pre-formed blank of raw rubber compound to be inserted into a “pot” in the mould, when the mould is closed the piston will locate in the pot and force the rubber compound from through the transfer holes and into the closed cavity. Once in the cavity the compound will be heated to its specified cure temperature whilst taking the form of the cavity. Once vulcanised the mould is opened and the product removed.Transfer moulding is used generally for low to medium volume production runs but is more suitable than compression moulding when moulding complex shapes. Also the process is more suitable when over-moulding other materials such as metals or fabrics.
Clifton Rubber’s vast experience of transfer moulding products means that when it comes to manufacturing a product for our customers we can guarantee a high quality. Typically we can transfer mould rubber to metal or rubber to fabric bonded items such as engine mounts, tipper blocks, pump diaphragms etc.
The significant difference when comparing rubber injection moulding to transfer and compression moulding is its ability to be fully automated therefore reducing the requirement for skilled operatives to be present at all times in the process. The injection moulding process requires uncured rubber compound strips to be directly fed into the injection unit. The injection unit heats and plasticises the material which is then injected directly into the closed mould tool. Using gates and runners the material flows into the cavity (or multiple cavities) and once the material has fully vulcanised the mould opens and the parts are ejected.Injection moulding is used generally for high volume production runs of both simple and complex shapes. The mould tools required are generally more complex in design than transfer or compression moulds but the automation of the process and elimination of preformed blanks means that typically unit prices are lower.
Moulded products can be made using any commercially available rubber and in a wide spectrum of colours and hardnesses. Common materials we process include:
We have the technical expertise to adhere rubber to other materials including bonding rubber to metals, plastics and ceramics either during the vulcanisation process (hot bond) or after the moulding process is complete (cold bond).
Contact us for more in depth information on the materials we have available and to specify the correct material for your product.
Compound Characteristics »
Properties of Rubber »
We work with customers from a wide range of industries across the UK, Europe and around the world. Some of these industries are listed below:
“We have worked with Clifton Rubber for 30 years and the level of service has always been second to none. We don’t hesitate to contact them when we have an idea or a new rubber component for them to look at.”
Peter, Purchasing Manager, Machinery Manufacturer