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Bimetallic Screw

Nitride Cylinder
02 January 2021
Nitride Screw
04 January 2021

With a view to meet the ever increasing market demands, present day plastic processors have resorted to the use of plastic raw materials which included all kinds of sophisticated ingredient such as glass fiber additive, carbon fiber, mineral stone powder additive, heat-resisting chemical additive, etc., thereby causing serious abrasion and to the barrel and screw as well as reducing their life span. To meet this challenge, our Co. had several kinds of screw which has shown a remarkable anti-abrasion and anti-corrosion resistance in its practical application. Not only PTA treatment on screw flights, also developed the technique of hardness coating of the entire screw surface, so as to bring more benefits to the processors.

PTA-WELD

Plasma is a gas which is heated to an extremely high temperature and ionized so that it becomes electrically conductive. The plasma transfer arc welding process uses this plasma to transfer an electric arc to the screw flight. The metal to be welded is melted by the intense heat of the arc and fuses together.
  • Model: S-59 A/B
  • Process: PTA-Welding
  • Average Hardness: HRc 52-55
  • Application Glass Fiber: Below <15%
  • Recycle Material: Below <30%
  • Wear Resistant: ★★★
  • Corrosion Resistant: ★★★
PTA Alloy Welding Machine

FULLY-COAT

Fully Coat screw is use HP/HVOF (High pressure/ High velocity Oxygen Fuel) technology to coat the alloy powder on the entire screw surface. It means alloy powder spraying is under high pressure and high velocity (3-4 times sonic). The adhesive force is over 10000PSI, and the powder density can achieve to 99.8%.
  • Model: S-42 A/B
  • Process: Powder Coating
  • Average Hardness: HV 1100-1400
  • Application Glass Fiber: 30%-50%
  • Recycle Material: Above >30%
  • Wear Resistant: ★★★★★
  • Corrosion Resistant: ★★★★☆
  • Model: S-75 A/B
  • Process: Powder Coating
  • Average Hardness: HV 900-1100
  • Application Glass Fiber: Above >30%
  • Recycle Material: 30%-50%
  • Wear Resistant: ★★★★☆
  • Corrosion Resistant: ★★★★★
HP HVOF Alloy Coating Machine

STAINLESS STEEL (FULLY-HARD)

High percentage of Cr provides stainless steel has outstanding anti-corrosive. The hardness can achieve to over HV 1000 after plasma nitride.
  • Model: S-88 A/B
  • Process: Vacuum + Plasma nitriding
  • Average Hardness: HRc 48-50
  • Application Glass Fiber: Below <15%
  • Recycle Material: Below <30%
  • Wear Resistant: ★★
  • Corrosion Resistant: ★★★★

TOOL STEEL (FULLY-HARD)

With high percentage of C and Cr, tool steel has good anti-abrasion performance and toughness performance. Mo and V also provide tool steel a high impact and good heat treatment stability.
  • Model: S-79 A/B
  • Process: Vacuum + Plasma nitriding
  • Average Hardness: HRc 58-60
  • Application Glass Fiber: 15%-30%
  • Recycle Material: 30%-50%
  • Wear Resistant: ★★★★
  • Corrosion Resistant: ★★★

Powder Steel (Fully-Hard)

The mechanical specifications of powder steel are better than tool steel. The heat treatment stability is also better than tool steel; furthermore, it is easier to estimate the deformation after heat treatment. Due to the better hardness, toughness and it can temper in the high temperature, so powder material is suitable for PVD coating.
  • Model: S-04 A/B
  • Process: Vacuum + Plasma nitriding
  • Average Hardness: HRc 58-60
  • Application Glass Fiber: 15%-30%
  • Recycle Material: 30%-50%
  • Wear Resistant: ★★★★
  • Corrosion Resistant: ★★★☆
  • Model: S-23 A/B
  • Process: Vacuum + Plasma nitriding
  • Average Hardness: HRc >60
  • Application Glass Fiber: Above >30%
  • Recycle Material: Above >50%
  • Wear Resistant: ★★★★☆
  • Corrosion Resistant: ★★★☆
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