Plastic extrusion melts and conveys thermoplastics through a precision die to form profiles, tubes, and sheets. Using materials like PE, PP, PVC, and ABS, the process relies on calibrated dies and cooling systems for consistent parts in construction, automotive, and packaging.
Plastic extrusion is a continuous manufacturing process in which thermoplastic pellets are melted and shaped through a die to create profiles, tubes, sheets, or films. Material is fed into a heated barrel where a rotating screw conveys, compresses, melts, and homogenizes the polymer. Process control includes temperature profiles, screw speed, back‑pressure, and line speed, all of which influence melt quality and dimensional stability. Common materials processed include PE, PP, PVC, ABS, PET, TPU, and filled or reinforced compounds. Tooling consists of breaker plates and screen packs for filtration, plus precision‑designed dies with flow channels that ensure uniform distribution and consistent wall thickness. Downstream equipment—such as vacuum calibration tables, cooling tanks, haul‑offs, and cutters—stabilizes and finalizes product geometry. A wide range of tooling materials, mainly corrosion resistant tool steels is used depending on the load conditions and environments. Plastic extrusion is widely used for pipes, hoses, window profiles, wire insulation, films, packaging sheets, and structural plastic components across construction, automotive, medical, and consumer industries.
BÖHLER M300 is a prehardened corrosion-resistant martensitic chromium steel that can be tempered to a higher strength due to its carbon content. Due to the alloying with chromium and molybdenum, BÖHLER M300 has very good corrosion resistance and good wear resistance and is therefore suitable for molds for processing chemically aggressive molding compounds (e.g. PVC).
Read MoreBÖHLER M303 is a corrosion-resistant, martensitic chromium steel with very good toughness, corrosion resistance, good wear resistance and improved machinability and polishability. Compared to 1.2316, BÖHLER M303 has better homogeneity and is approved for food and beverage contact.
Read MoreBÖHLER M303HIGHHARD corresponds to BÖHLER M303 in the High-Hard product variant. A variation in the heat treatment enables significantly higher wear resistance.
Read MoreBÖHLER M303 ISOPLAST corresponds to a remelted BÖHLER M303 . The variation in the production route enables greater toughness and polishability thanks to higher purity and improved homogeneity. Also available as product variant BÖHLER M303HH ISOPLAST (high-hard variant).
Read MoreBÖHLER M310 ISOPLAST is a corrosion-resistant, martensitic chromium steel which, through electroslag remelting and optimization of the chemical composition, has a good homogeneity and a balanced hardness-toughness-corrosion resistance ratio.
Read MoreBÖHLER M314 is a prehardened, corrosion-resistant martensitic plastic mold steel which, due to its chemical composition, has very good machinability and uniform strength over the entire cross-section.
Read MoreBÖHLER M315 is a prehardened, corrosion-resistant martensitic plastic mold steel. Due to its chemical composition, BÖHLER M315 has improved machinability compared to 1.2085 and is approved for food contact.
Read MoreBÖHLER M333 ISOPLAST is a corrosion-resistant, martensitic plastic mold steel with excellent polishability and toughness for products with highest surface requirements. BÖHLER M333 ISOPLAST is also approved for food and beverage contact.
Read MoreBÖHLER M340 ISOPLAST corresponds to a corrosion-resistant, martensitic chromium steel with improved wear resistance. This is ideal for the application area of glass fiber reinforced plastics. In addition, the BÖHLER M340 ISOPLAST is approved for food and beverage contact.
Read MoreBÖHLER M368 MICROCLEAN is a corrosion-resistant, martensitic chromium steel produced by powder metallurgy. Due to the alloy concept and the production route, the steel has a high wear resistance, high corrosion resistance and high toughness. In addition, BÖHLER M368 MICROCLEAN is approved for food and beverage contact.
Read MoreBÖHLER M380 ISOPLAST is a high-nitrogen alloyed, corrosion-resistant, martensitic plastic mold steel electro-slag remelted under pressure with excellent corrosion resistance, very good polishability and very high toughness combined with a high hardness of up to 60 HRC. In addition, BÖHLER M380 ISOPLAST is approved for contact with food and beverage.
Read MoreBÖHLER M390 MICROCLEAN is a corrosion-resistant, martensitic chromium steel produced by powder metallurgy. Due to its alloy design, this steel has very high wear resistance and good corrosion resistance. In addition, BÖHLER M390 MICROCLEAN is approved for food and beverage contact.
Read MoreBÖHLER M398 MICROCLEAN is a corrosion-resistant, martensitic chromium steel produced by powder metallurgy. Due to its alloy design, this steel has good corrosion resistance and higher wear resistance compared to BÖHLER M390 MICROCLEAN.
Read MoreBÖHLER M789 AMPO is a newly developed maraging steel, which combines the mechanical properties of 1.2709 with the corrosion resistance of 17-4PH. This patent bending grade can easily printed without any preheating and achieves a hardness of about 52 HRC with a very easy heat treatment. Furthermore, this material shows an excellent polishability, which makes it the ideal choice for inserts with conformal cooling in plastic injection molding and in any other application where a high hardness and corrosion resistance is of need.
Read MoreBÖHLER N360 is a corrosion resistant, martensitic stainless steel, produced using the pressurized-ESR-process ( P-ESR) . Compared to conventionally produced Cr and CrMo steels, BÖHLER N360 offers improved corrosion resistance and toughness properties as well as high hardness and compressive strength. It is typically used for anti-friction bearing components e.g. bearings, ball screws and wear resistant components for use in the engineering and medical industry, e.g. knives and other cutting tools, shafts, plastic extrusion, screw driver, drills, fasteners and engine-components, requiring resistance to both corrosion and wear with hardness not lower than 58 HRC after hardening and tempering, but usage is not limited to such applications.
Read MoreBÖHLER N685 is a corrosion-resistant, martensitic chromium steel with a high carbon content and molybdenum and vanadium additives.
Read MoreBÖHLER N690 is a corrosion-resistant, martensitic chromium steel with a high carbon content and the addition of cobalt, molybdenum and vanadium. BÖHLER N690 is also approved for food and beverage contact.
Read MoreBÖHLER N695 is a corrosion-resistant, martensitic chromium steel with a high carbon content and added molybdenum.
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