Injection-molded fan housing

The injection molding process is particularly suitable for the production of fan housings, as the technical design is freer in terms of geometry than with other manufacturing processes. Injection molding allows complex geometries to be created and ribs, snap hooks or air guides can be formed directly.
Injection molding therefore offers more design freedom and precise control of wall thicknesses. In addition, production using injection molding is particularly economical for large quantities, as the main cost factor for the mold is quickly amortized.

For fan housings with integrated heat recovery, a combination of mechanical stability, airtightness and temperature resistance is particularly important. ABS (acrylonitrile butadiene styrene) has proven itself in applications such as controlled domestic ventilation or heat exchangers in bathrooms, where temperatures usually remain moderate. This plastic not only offers the necessary strength, but also enables high-quality, visually appealing surfaces – ideal for visible components.
However, if higher temperatures occur, for example due to permanent thermal stress in an industrial environment, temperature-resistant special plastics such as polyamide (PA), polycarbonate (PC) or polyphenylene sulphide (PPS) can be used. These materials retain their dimensional stability even at elevated temperatures and ensure that the housing functions reliably over the long term.
The choice of plastic therefore depends largely on the specific area of use and the temperature profile of the application. We will be happy to advise you individually with regard to applicability and cost-effectiveness.

Yes, in principle, recyclable plastics or recyclates can also be used for fan housings. However, it is important to note that the use of recyclates is associated with limitations in terms of mechanical properties. In particular, if the material has to be elastic, there is an increased risk of brittle fracture with recyclates compared to new material. The surface quality of recyclates is also usually lower, which often makes them less suitable for visible components.
A practicable solution for some applications is therefore material separation. For example, the inside of the fan housing can be made from a recyclate, while the outer housing is made from a high-quality, visually appealing material. Whether and to what extent recyclates can be used sensibly therefore always depends on the specific requirements of the product.

Surface texturing actually plays a key role in the ease of assembly of fan housings, particularly in the visible surface.
Less sensitive textures are advantageous for assembly processes, as they are more robust and allow easier handling during assembly. These structures are also less sensitive to scratches and wear, which makes processing easier.
We can create almost any surface structure by etching or laser processing the tools.