Plastics Industry

high-quality coating even with complex geometries

Betz-Chrom is the specialist for surfaces in plastics engineering. Decades of experience in in-house anode and fixture construction enable us to provide individual and precise coatings for geometrically complex extrusion and injection molding screws for protection against corrosion and wear. Due to the anti-adhesive hard chrome property, the “sticking” or “caking” of plastic is avoided, so the cleaning process of the screws is less time-consuming. Furthermore, we offer the regeneration of screws.

Our know-how for protection against wear and corrosion

The challenge in hard chrome plating lies in the targeted application of apertures and auxiliary anodes to ensure even layer distribution. Our fixture construction team combines 70 years of anode engineering experience with advanced CAD software and 3D printing technology to create the optimal fixture based on the engineering drawing. You also have the option of chrome-plating pre-nitrided screws. This requires a series of special pretreatment steps to guarantee perfect adhesion of the chrome layer to the base material. The hardened base material in combination with the hard chrome layer will increase the service life many times over. As a downstream process step, we carry out mechanical processing using the grinding and polishing processes.

Especially for the plastics industry, Betz-Chrom hard-chromes the following components: screws, nozzles, mandrels, housings, tubes, displacers, mandrel carriers, torpedoes, chasers, spiral distributors, screw heads and screw tips. Learn more about our hard chrome processes.

Screw cylinder can be plated with the electroless nickel process. Here you can get more information about electroless nickel plating.

Hard chrome screw machine building

Dimensions of your components for hard chrome plating:

  • Vertical chrome plating: ⌀ 1300 x 4700 mm or 8000 mm with rotation of the workpiece
  • Horizontal chrome plating: ⌀ 60 x 6500 mm
  • Forms: 1700 x 1500 x 1300 mm
  • Weight: 5000 kg

Would you like technical advice?
We are looking forward to your inquiry!

Repair of worn screws

The high-quality regeneration of injection molding screws and extruder screws is a cost-effective, time-saving and resource-saving alternative to purchasing new ones. The restoration of the original dimensions and technical characteristics is accompanied, analyzed and documented by our quality team. For the mechanical processing steps of the repair, we work with carefully selected cooperation partners. The hard chrome plating, polishing of the screws and final quality control takes place exclusively in our company.

faster than a new acquisition

less expensive than a new acuisition

more resource-saving compared to a new acquisition

all common steels can be coated

Our core processes

Steel plate chemically nickel-plated on all sides

Electroless Nickel

For hardness, wear resistance and very high corrosion protection with even layer thickness distribution.

Screw tip hard chrome plated on all sides

Hard Chrome

For corrosion protection, tribological properties and a particularly high wear resistance against mechanical stress.

Piston in CNC grinding machine at Betz-Chrom

Precision Grinding

For dimensional accuracy, roughness depth and bearing ratio depending on the requested surface quality.

Betz-Chrom – your partner for strong parts

In the sense of a trustful partnership, you will receive highly qualified technical advice from us that is tailored to your needs. We combine 70 years of experience in surface technology with an innovative and inquisitive corporate culture. Our quality awareness, our occupational health and safety management as well as our measures for environmental protection and energy saving are audited and certified according to DIN standards. As an on-schedule partner with high quality level, we constantly aim to find the optimal process solution for you.