Ningbo Superior Machinery and over 30-year-old factory with ISO 9001:2008 certificated, manufacturing screws, barrels for injection and extrusion processing.
Specifications of our Ni-based bimetallic barrel:
Basic Material for body: superior pre-hardening material 4140
Alloy powder: Nickle-based self-melting alloy powder from American Wall Colmonoy Corporation
Processing: vacuum sintering cladding ( we're the first and unique Chinese factory applying this technology to barrel production since 2009!)
Hardness: 56-60 HRC
Service life: 3~6 times than bimetallic barrels processed by high temperature centrifugal casting
Application: halogen-free plastic, the high abrasion, corrosion materials adding high fibre, carbon fiber, mineral fiber, ceramic, magnetic powder, metal powder etc.
Advantage: more stable molecular structure, higher density of the alloy power than common bimetallic barrels.
APPLICATION
A Commonly used for adding acid plastic with GF less than 30%
B For transparent material and color mixing material
TECHNICAL PARAMETER
A Using 38CrMoAlA high quality alloy structural steel, the top spray-welded nickel based alloy powder. Alloy thickness1.5mm. Hardness HRC 53-56
B 42CrMo alloy structural steel sprayed with nickel-base alloy powder.Alloy thickness1.5mm,Chrome plating thickness 0.03-0.05mm.
The bimetallic barrel for single screw is a kind of barrel moulding 2-3mm thick alloy coat on the barrel inner wall which has excellent corrosion resistance, abrasion resistance and high working temperature. And its useful service life is greatly improved contrast to the common nitrided cylinder. Bimetal has more obvious advantages when processing special plastics to enhance the abrasion life, such as engineering plastic, fluorine plastics, PPO and etc.
The company product's single/twin screw, uses special alloy powders being sprayed and welded on the screw's ridge, and uses different alloys and welding methods for the screw of different functions.
Materials:
Quality 38CrMoAlA
Quality power metallurgy raw materials
Technical index
Depth of nitrated layer: 0.5-0.8mm
Hardness of nitration: 900-1020hv
Fragility of nitration: less than grade 1
Surface roughness: ra 0.4um
Hardness of cr-coating layer: >=950hv
Hardness of bimetallic layer: hrc55-72
Thickness of cr-coated layer: 0.03-0.08mm
Depth of bimetallic layer: >2mm.
Deck screws are screws specifically designed for use in outdoor decking projects. They are usually corrosion-resistant to withstand exposure to the elements. The "inch" specification likely refers to the length of the screws.
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.
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.