Hints and tips for specialist enclosure manufacturers and vehicle builders
Extruded rubber profiles are used for sealing doors and panels in a variety of industries, including the aerospace, automotive, lighting, appliance, electronic, construction, marine, medical and general industrial applications.
This section can be quite simple – ie, circular, annular, rectangular profiles – or very complex (window profile, rubber car seal). Some common materials used in rubber extrusion include EPDM, SBR, (CR – neoprene), silicone, (NBR – nitrile) and (NR- natural rubber).
In this article, Andy Billingham, managing director EMKA (UK), assesses their particular value in connection with applications such as:
For optimum effectiveness, the compression of a typical sealing edge protection profile should be a maximum of 50%, as otherwise the compression and recovery can be adversely affected. It is recommended the profile should be compressed 30-40%.
An excellent solution to the common problem of sealing corner joins is the use of spliced joints. This process effects a joint that is particularly effective where there is a requirement for a continuous ring or frame, such as windows or automotive applications. Spliced joints ensure that the resilience and dynamic properties of the profile are maintained throughout the joint. Frames and rings can save greatly on assembly time, while significantly enhancing sealing performance.
Wide range of gasket offerings
Specialist gasket sections are offered by many manufacturers in flame-retardant, low-smoke, low-tox materials compliant to relevant standards, while extruded gaskets for enclosures and other purposes are available in self-adhesive, self-grip (clip-on), channel fixing and window type (with expansion insert). The range includes EPDM, NBR, CR, PVC and silicone, as well as fire protection specifications and many with EMC-compatible coating.
Specialist installations, such as coaches, motor homes and caravans, also require moulded sections to suit doors, windows and ventilation panels, as well as external storage compartments, and often require specialist materials or finishes:
In selecting the right mounting type for every installation situation, we find that this is a decisive factor in a successful installation:
With sealing profiles and clamping profiles made of 100% EPDM, EMKA have successfully enhanced gasket quality with high resistance to weathering, also UV radiation and acids, which makes them particularly durable – at no extra cost.