Zhejiang Zhongyang Screw Manufacturing Co., Ltd.

Specification: 45/90, 45/100, 50/105, 51/105, 55/110, 55/120, 58/124, 60/125, 65/120, 65/132, 68/143, 70/135, 70/140, 75/150, 80/143, 80/156, 92/188 The above are standard specifications, we can customize according to customers' requirements. The compression ratio of screws can be designed according to different products and ingredients. Base materials: 1)38crmoala(jis sacm645) 2)42crmo(aisi 4140) 3)4cr5mosi v1 (jis skd-61) 4)9cr18mov 5)hpt Technics: Heat treatment High-frequency quenching Nitriding treatment Hard-chrome electroplating Bimetallic alloy welding Bimetallic alloy centrifugal casting Technical parameter: Nitrided layer depth: 0.5-0.8mm Nitrided hardness: 900-1000hv Nitrided brittleness: less than grade 1 Surface roughness: ra0.4 Linearity of screw: 0.015mm Hard-chrome plating hardness after nitriding: ¡ý 950hv Chrome-plating layer depth: 0.025-0.085mm Bimetallic layer depth: 3mm Slushing oil coated& film wrapped in wooden case

Specification: Screw diameter: d15- d 300 L/d ratio: 15-46 Product classification: Aiming at different plastic products the screw can be chosen from: general type, pin type, barrier type, separation type, and gas-exhausting type, etc. Base materials: (1)38crmoala(jis sacm645) (2)42crmo(aisi 4140) (3)4cr5mosi v1 (jis skd-61) (4)9cr18mov (5)hpt Bimetallic alloy materials: 1)fe-based alloy 2)ni-based alloy/deloro alloy 3)co-based alloy 4)nico-based alloy 5)tungsten carbide/wolfram carbide Technics: Heat treatment High-frequency quenching Nitriding treatment Hard-chrome electroplating Bimetallic alloy welding Bimetallic alloy centrifugal casting Technical parameter: Nitrided layer depth: 0.5-0.8mm Nitrided hardness: 900-1000hv Nitrided brittleness: less than grade 1 Surface roughness: ra0.4 Linearity of screw: 0.015mm Hard-chrome plating hardness after nitriding: >950hv Chrome-plating layer depth: 0.025-0.085mm Bimetallic layer depth: 3mm Slushing oil coated& film wrapped in wooden case

Specification: Screw Diameter: D15- D 300 L/D ratio: 15-46 Product classification: Aiming at different plastic products the screw can be chosen from: General type, pin type, barrier type, separation type, and gas-exhausting type, etc. Base Materials: (1)38CrMoAlA(JIS SACM645) (2)42CrMo(AISI 4140) (3)4Cr5MoSi V1 (JIS SKD-61) (4)9Cr18MOV (5)HPT Bimetallic alloy materials: 1)Fe-based alloy 2)Ni-based alloy/Deloro alloy 3)Co-based alloy 4)NiCo-based alloy 5)Tungsten carbide/Wolfram carbide Technics: Heat treatment High-frequency quenching Nitriding treatment Hard-chrome electroplating Bimetallic alloy welding Bimetallic alloy centrifugal casting Technical parameter: Nitrided layer depth: 0.5-0.8mm Nitrided hardness: 900-1000HV Nitrided brittleness: less than grade 1 Surface roughness: Ra0.4 Linearity of screw: 0.015mm Hard-chrome plating hardness after nitriding: >950HV Chrome-plating layer depth: 0.025-0.085mm Bimetallic layer depth: 3mm Slushing Oil Coated& Film Wrapped in Wooden Case

Specification: Screw diameter: d20mm-d220mm Mould clamping force: 250t-3200t Shot weight: 30g-30000g Technical information Base materials: (1)38crmoala(jis sacm645) (2)42crmo(aisi 4140) (3)4cr5mosi v1 (jis skd-61) (4)9cr18mov (5)hpt Bimetallic alloy materials: 1)fe-based alloy 2)ni-based alloy/deloro alloy 3)co-based alloy 4)nico-based alloy 5)tungsten carbide/wolfram carbide Technics: Heat treatment High-frequency quenching Nitriding treatment Hard-chrome electroplating Bimetallic alloy welding Bimetallic alloy centrifugal casting Technical parameter: Nitrided layer depth: 0.5-0.8mm Nitrided hardness: 900-1000hv Nitrided brittleness: less than grade 1 Surface roughness: ra0.4 Linearity of screw: 0.015mm Hard-chrome plating hardness after nitriding: ¡ã 950hv Chrome-plating layer depth: 0.025-0.085mm Bimetallic layer depth: 3mm. Slushing oil coated& film wrapped in wooden case

Specification: Screw diameter: d20mm- d220mm Mould clamping force: 250t-3200t Shot weight: 30g-30000g Base materials: (1)38crmoala(jis sacm645) (2)42crmo(aisi 4140) (3)4cr5mosi v1 (jis skd-61) (4)9cr18mov (5)hpt Bimetallic alloy materials: 1)fe-based alloy 2)ni-based alloy/deloro alloy 3)co-based alloy 4)nico-based alloy 5)tungsten carbide/wolfram carbide Technics: Heat treatment High-frequency quenching Nitriding treatment Hard-chrome electroplating Bimetallic alloy welding Bimetallic alloy centrifugal casting Technical parameter: Nitrided layer depth: 0.5-0.8mm Nitrided hardness: 900-1000hv Nitrided brittleness: less than grade 1 Surface roughness: ra0.4 Linearity of screw: 0.015mm Hard-chrome plating hardness after nitriding: 950hv Chrome-plating layer depth: 0.025-0.085mm Bimetallic layer depth: 3mm. Slushing oil coated& film wrapped in wooden case

Material: high carbon spring steel, spring steel, stainless steel, alloy steel Compression Spring, Extension Spring : Wire Diameter: 0.2-40.0mm Torsion spring wire diameter :0.2-35mm Surface Finish: black , Zinc, Nickel, silver, golden, tin, powder coating, shot pin Applications: Automotive, medical device, agricultural machinery ,electronics, toy, electric power distribution. Extension spring hook include Germany hook, British hook, Side hook We can customize special design of springs based on your requirement.

Parallel twin-screw and barrel used in extruder Specifications PX-45/2~150/2 Lenght/Diameter Ratio:L/D=18~25 The compression ratio of the screw can be designed according to different raw materials and products. Hardness hardness:HV800-1000 Nitrided Case Depth:0.45mm~0.7mm Alloy Hardness:HRC 50-65 Alloy Depth:0.8mm~2.0mm

Specifications: 45/90, 45/100,50/105, 51/105, 55/110, 58/124, 60/125, 65/120, 65/132, 68/143, 70/140, 75/150, 80/143, 92/188 The compression ratio of the screw can be designed according to different products and mixtures. Nitrided Hardness: HV 900-1000 Nitrided Case Depth: 0.45mm-0.7mm Alloy hardness: HRC50-65 Alloy depth: 0.8mm-2.0mm Materials: Quality 38CrMoAlA Advanced nitriding process Corrosion&Abrasion resistance bimetal spraying process