SIJ Ravne Systems UK

• SIKNIVES for rolling mills and for profile and pipe production
  Industrial knives for metal are essential in rolling mills, where they are used for cutting hot and cold rolled sheet metal and in plate mills. They also play a critical role in the production of black pipes, as well as cold rolled and stainless steel pipes.

• SIKNIVES for non-ferrous alloys and for steel service centers
  Our knives are also expertly utilized in rolling mills for non-ferrous alloys, providing precision cutting for materials like copper and aluminum. These custom-made knives are available in a broad range of steels, including those designed for impact resistance, wear resistance, hot and cold work, high-speed cutting, nickel-based alloys, and more.

• SIKNIVES for processing lines and for metal scrap recycling and demolition
  Mentioned knives are indispensable in various processing lines, including pickling, galvanizing, tinning, painting and cold reduction lines. They are suitable for side trimming, scrap chopping, sanding and cutting to length. In addition, they are vital in the recycling of various ferrous and non-ferrous metals and cast iron, providing consistent performance in metal scrap recycling and demolition.

Our extensive product range i includes straight blades up to 6 meters in length, round blades with a diameter of up to 1,400 mm, and uniquely shaped blades for various profiles such as round, hexagonal, and angled bars, as well as bed frames and notcher knives. Additionally, we produce stripper rings, forming rolls for tubes and profiles, machine ways, special wear parts, and knife holders, ensuring comprehensive solutions for all your metal cutting needs.

• SIKNIVES for shredding
  We provide high-quality shredder knives designed for efficient shredding and volume reduction of various municipal and industrial wastes, including WEEE, tires, plastics, paper, cables, aluminum, copper, pulp, biomass, rubber, wood, pallets, medical waste, oil filters, textiles, and batteries.

• SIKNIVES for granulating
  Our granulator knives are expertly crafted for converting recyclable materials such as PET, plastic, copper, aluminum, and rubber into granulate, making them ideal for the recycling industry.

• SIKNIVES for scrap metal recycling
  We offer specialized recycling knives designed to handle a broad spectrum of ferrous and non-ferrous metals, including cast iron, ensuring optimal performance in recycling centers.

• Wear and spare parts
  Additionally, we supply durable wear and spare parts to ensure the longevity and performance of your equipment.

Our commitment to precision and durability ensures that SIKNIVES products not only meet but exceed industry standards, providing reliable solutions for even the most demanding shredding and recycling applications. Whether you're processing waste or recycling materials, SIKNIVES knives are designed to enhance productivity and reduce downtime, making your operations more efficient and cost-effective.

• SIKNIVES for veneer and plywood
  We produce high-quality veneer knives up to 6,000 mm (236 inches) in length, crafted from high-grade through-hardened solid steels and inlay steel. We manufacture rotary clipper knives for plywood and veneer production.

• SIKNIVES for wooden chips production
  Our chipper knives are designed for a variety of wood types and conditions, providing exceptional performance in wood chip production. These knives are available in different grades and are vacuum hardened to ensure durability and efficiency.

• SIKNIVES for OSB, MDF and particle board production
  We manufacture high-performance knives for grinding wood pulp, essential for producing OSB, MDF, and particle boards. Our flaker knives are available in various material grades, tailored to suit different machinery and wood types.

• SIKNIVES for saw milling
  Our saw milling product range includes trimmer knives and ultra-thin planing knives, made from high-grade carbide-tipped steel, premium high-speed steel, and tool steel. These knives are engineered for superior edge retention and performance across various applications.

• Comprehensive Parts and Accessories
  We provide an extensive selection of wear and spare parts, including knife holders, mill sieves, screws, washers, nuts, wear plates, and pressure bars, ensuring you have everything needed for seamless operation and maintenance.

• SIKNIVES for paper, cardboard and corrugated cardboard
  Our product line features cutting-edge industrial knives designed for the paper and cardboard industries, including knife holders and a variety of knives tailored for processing pulp, paper, and cardboard materials.

• SIKNIVES for packaging and for foil
  We also provide specialized knives for the packaging sector, as well as knives for cutting and perforating foils and similar materials. Our packaging knives are ideal for use in pipe and tube mills, handling both cutting and trimming tasks. Our foil knife assortment includes both perforating and non-perforating straight and circular knives with and without teeth.

• Optimizing Knife Performance
  Choosing the right materials and processing techniques is crucial for maximizing the lifespan and performance of your knives. In this industry, precision cutting, sustained sharpness, and durability are essential.

Our knives are made from high-quality materials and according to strict quality standards that ensure the achievement of tolerances and professional processing. Our experience, knowledge and new technologies allow us to advise you and help you optimize your cutting process.

We produce knives according to your requirements.

Our rich experience and own R&D Department allow us to customize knives to special requirements, reflected in the durability of knives, increased machine uptime, lower energy consumption and enhanced machine output.

• Knives for tyre and rubber industry

• Knives for food industry

• Ice scrapers - Ice planing knives

Our forged rolls are engineered to meet the highest standards of productivity, reliability, and operational safety. They deliver superior surface quality, enable higher rolling speeds, and handle the most demanding materials, all while positively impacting Total Cost of Ownership (TCO).

These advanced properties are achieved through an innovative heat treatment process. Initially, rolls are quenched and tempered to establish base hardness, followed by precise surface hardening using dual-frequency induction. This is complemented by rapid cooling with liquid nitrogen at temperatures below -140°C and low-temperature tempering, ensuring optimal work hardness.

Dimensional range:

• Up to 800 (31'') mm diameter

• Up to 5,500 mm length

• Up to 10,000 kg (22,000 lbs) weight

Our surface hardened rolls are crafted from premium steels to meet specific customer requirements.

Key characteristics:

• Utilization of ultra-clean steels

• Specialized steels developed for cold rolling

• Computerized control of heat treatment processes

• Ongoing R&D for roll quality and application enhancement

• Cutting-edge NDT inspection methods

• Independent quality assurance system

• Customer-centric partnership approach

Rolls are produced from special alloyed tool steels, which are made using electric arc furnace with advanced vacuum technology processes or by an additional electroslag remelting process (ESR).

Our forged rolls withstand high pressure and are characterized by uniform hardness within +/- 0.5 HRC throughout the working barrel and a homogeneous steel microstructure.

Hardness drop throughout the hardened layer is max. 3%.

We offer a comprehensive range of highly reliable forged products for continuous casting and cold rolling in the aluminum industry. Achieved through the integration of superior steel grades, precise machining, rigorous roll inspections, and continuous investment in material development.

Dimensional range:

• Up to 800 (31,5'') mm diameter

• Up to 5,500 mm length

• Up to 10,000 kg (22,000 lbs) weight

Forged Rolls for Cold Rolling Mills

Forged rolls for cold rolling meet customer demands for increased productivity, high reliability, operational safety, finer surface quality, higher rolling speeds, and the ability to handle more demanding rolled materials, thus positively influencing Total Cost of Ownership (TCO).

Forged Rolls for Foil Rolling Mills

Our rolls are designed to enhance productivity, reliability, safety, surface quality, and rolling speeds, while managing demanding materials effectively, thus optimizing Total Cost of Ownership (TCO).

Shells for Continuous Strip Casting

Our roll shells maintain consistent mechanical and material properties across their volume. Available in black, machined, or honed conditions with a maximum outer diameter of 1200 mm. Roll cores come plain or grooved, with precision manufacturing verified using 3D coordinate measuring technology.

Key characteristics:

• Advanced steel alloys from electric arc furnaces or electro slag remelting (ESR)

• Guaranteed uniform hardness within +/-0.5 HRC

We provide an array of work, intermediate and back up rolls for cold rolling of stainless steel, silicon and non ferrous grades made from various high-speed steels (powder metallurgy, conventional HSS), ledeburitic and tool steels.

Our volume hardened rolls are characterized by total control of chemical composition, low grind-off, low percentage of accidents, high hardness and toughness, very uniform hardness, high wear resistance, high safety against micro cracks, cracks, spalling and high compressive strength.

Dimensional range:

• From 20 (0.79'') to 350 (14'') mm diameter

• Up to 3,000 (118'') mm length

• Up to 2,500 kg (5,600 lbs) weight

Rolls are hardened across full diameter to the hardness which corresponds to roll type and purpose.