Today on the blog we will be taking a closer look at our Design Guide brochure.
Despite the importance for our customers of having an effective and high performance seal, it is often one of the last elements a designer considers when developing a new part. Leaving this focus until the end of the design process can cause problems, especially if the part needs to have an Ingress Protection (IP) rating. Despite the flexibility of CeraPUR® foam, parts will often need to be adapted or changed in order to incorporate the seal, which adds additional time and costs. Therefore the earlier a designer can consider the way they will seal their part, the easier it is to develop a high quality seal.
This is where our Design Guide comes into play. It was created for designers and R&D experts to give an overview of CeraCon’s CeraPUR® foam, its properties and how it can be adapted for their companies’ sealing needs. The brochure contains a range of information on how we change the foam as well as the impact that can have on the seal of the parts it is being applied to.
Over the next couple of weeks we will be breaking down the Design Guide to give a bit more detail about the different properties of CeraPUR® and how it works. Today will we look at the cell structure and sealing performance in relation to bead width, compression and foam hardness.
CeraPUR Foam Technology
CeraPUR® foam has a predominantly closed cell structure. This means that it isn’t reliant on surface skin integrity for it to work and it performs well with water tight seal requirements.
It is a unique single part, low temperature heat curing foam and so isn’t reliant on any additional chemicals to be added in order to apply or cure it. The process takes the raw material from a drum, mechanically mixes it with an adjustable amount of air and then robotically applies to the part. The amount of air used in this process impacts the foam hardness, the more air added the harder the foam will be. Generally, the harder the foam the higher the sealing performance. Other factors which improve the effectiveness of the seal include higher compression levels and wider bead widths.
Obviously the part itself plays a role in its sealing performance. Its flexibility, span, wall thickness and the size of the fixing points all have an impact on the seal. Although most problems can be overcome by adapting the compression, foam hardness or bead size, it is still crucial for designers to be taking the sealing of a part into consideration early on in the designing process.
We’ll continue to look in more detail at the Design Guide next week, focusing on joint design and adhesion. For any further information about CeraPUR® and its properties, feel free to download the full Design Guide from the website here. If you have any further questions on how we may be able to help with your company’s sealing need, please don’t hesitate to get in touch.