NEW

Optimum squeezing force for an o ring

It is true that the more squeeze you place on an o ring, the tighter the seal it will provide. In essence, the more squeeze (compression) you apply, the greater the force between the o ring and its mating hardware.  And ensuring you have the perfect seal is all...

O Ring Squeeze

The squeeze and shrinkage on an o ring are vital to understanding as these factors stand in the way of your application either experiencing a perfect seal or your application suffering from leaks.  You can measure the shrinkage of an o ring during...

Keeping your o rings bonded

EMI o rings. Those seal ring gaskets are made of silicone compounds, combining environmental sealing with electromagnetic interference protection.  Consisting of metal or metal-coated particles, silicone o rings are filled with silver, silver aluminium, or nickel...

The importance of mechanical seals when reducing water consumption in mining

Environmental considerations are at the top of most industry's agendas in the 21st century as companies evaluate and improve operations, processes, and systems.  Conserving water in mining is one such area that is now being investigated further with the rotation of...

How choosing the correct gasket reduces risks

Health and Safety across any industry are vital, especially so in industrial facilities and settings.  Why?  Because harmful leaks and emissions must be avoided at all costs to avoid serious accidents or injury to your teams and property.  That’s why having the right...

How to tighten your bolts perfectly

How to tighten your bolts and which tools you should use to achieve the perfect seal is not as seamless and straightforward as we would like. Various factors come into play in these situations, such as bolt grade, size, and even application type.  Tightening torques...

Static and Dynamic o rings

A range of factors and application dynamics come into play when choosing a particular type of o ring.  You need to understand the type of seal exert you require, the dimensions, and even compounds.  Due to the nature of an o ring and its overall design, o rings use...

Gasket Sealants

Fortunately, no one gasket suits a range of applications, but rather we have a multitude of gasket sealants available to meet various specifications and requirements.  Ultimately, sealants are used to effectively ensure gasket seals.  Helping to extend a gasket's life...

Types of industrial gasket material

Different industry sectors will use different types of gaskets and different types of gasket materials.   And of course!  Different industrial gasket materials will be much better suited to some industrial processes and applications compared to others.  As different...

Keeping a close eye on the gaskets your applications use

Gaskets are vital elements to any piping system and application that requires creating the perfect seal in order to prevent leaks.  This is the main role of a gasket, to provide a good seal, with some gasket materials sealing better than others in certain...

Important Design Features of Rubber Sealings

rubber sealings designWhen it comes to designing the perfect rubber sealing, there are a few design features to bear in mind to help achieve the optimum solution. 

In this post, we explore these rubber sealing features further and provide information on the benefits and best uses for these types of gaskets. 

Gasket design features to bear in mind 

Design awareness. 

Ultimately, a more straightforward and more symmetrical geometry of your design means the easier it will be to produce and manufacture your gasket. Those more complicated geometries often require additional finishing techniques such as trimming and hollowing. The downside this then causes is that these additional processes begin to increase the cost of your overall project, as well as increase the cost of part rejections, especially when compared to those simpler designs. 

Keeping it simple helps keep costs down, and tolerance levels much more friendly when it comes to production. Keeping parts symmetrical, avoiding overhangs, avoiding deep cuts, and sharp corners, are also recommended during the design phase. 

Check compatibility. 

When designing the perfect sealing product, it’s important to use the right filler material to match the application and environment it will be used within. The good news is there is now a variety of polymers and manufacturing processes, increasing the range of solutions on offer. 

When working with chemical substances, we would recommend a range of chemical resistant materials such as Viton, EPDM, and AFLAS. 

Consider rubber tolerance. 

It’s essential to consider tolerance as part of your design process as elastomers are known to undergo a certain degree of shrinkage. Establishing parameters as soon as possible in the manufacturing and design stages helps to ensure that the right amount of solution can be developed for the specific application the gasket is intended for, ensuring optimal tolerance levels at all times. 

Compare and contrast different materials using shore hardness. 

The shore hardness scales use a durometer gauge to measure and compare different materials using a spring-loaded steel rod and compressing the surface of the sample.  

In these cases, if, for example, you get a reading of 0, then this is equal to the maximum amount of indentation as possible. Whereas, a hardness of 100 shows exceptionally high resistance to indentation. 

Shore hardness also provides a measure of stiffness and flexibility. This is good to know if you’re looking at a rubbers material resistance to bending. 

Consider surface finishes. 

It’s important to check what manufacturing processes will be used and if any of these processes will leave marks on your final product. Processes that can leave such marks include: – 

  • Ejector pin marks – pins contact the rubber 
  • Sprue marks – injector sprue impacts the mould cavity 
  • Draft lines – mould plates come together and potentially leave faint lines. 

Are draft angles required? 

In some manufacturing processes, draft angles will be used to help release the rubber product design from the mould without damage. In these instances, you need to consider your design and if these draft angles will be required as part of your overall process. 

Think about cooling rates. 

At SSP, we would recommend keeping all processes and procedures as uniform as possible to prevent uneven cooling during the moulding process. This also helps to avoid any chance of shrinkage and dips. 

Rubber Gasket Process 

Rubber moulding processes can consist of compression moulding, extrusions, and injection moulding, where liquid raw rubber is cured into a mould and shaped by heat and pressure. 

From here, the mould cavity can then be cut to the desired shape and design. 

Products such as seals, caps, hoses, gaskets, grips, knobs, buttons, rollers, bumpers, and much more can all be manufactured using this process.

Find Out More Here!

Types of rubber seal designs 

Static seal types: 

  • Axial seals 
  • Radial seals 
  • Crush seals 
  • Seals with dovetail glands 

Dynamic seal types: 

  • Reciprocating seals 
  • Rotary seals 
  • Oscillating seals 

Of course, taking everything into account, and depending on your requirements, will ultimately depend on your rubber sealing design. 

For the best cost-saving, high-quality gaskets with reproducibility, designing simpler parts should always be your end goal. 

At Specialist Sealing Products, we provide professional advice and guidance on all of the design stages to help keep manufacturing processes running as smoothly as possible. 

Speaking to a gasket expert, like the team at SSP, helps to ensure you get the right rubber product design features you need, suitable to your application. 

Helping to save you time and money, call us on 01535 274 776 

Reference video: tarkka

Previous

Next

Contact Us
close slider

Your Details

Let us know how to get back to you.


How can we help?

Feel free to ask a question or simply leave a message.