TIPS:
1.The injection screw should be constructed of materials that provide a balance of abrasion resistance and corrosion protection. Options for construction include 38 CrMoAlA nitrided steel with abrasion resistant coating such as bimetallic or Tunsten carbide on screw flights.
2.The screw flights should not be chrome plated since reinforced or filled composites will abrade or chip the plating in a short period.
Screw Barrel show:
Advandages of bimetallic
1. Corrosion resisting,
Some plastic materials such as Fluorine,PVC,ABS or add additive GF,etc,when temperature rise higher,will send out corrosive gas, which will damage your screw and barrel.Common nitrided screw barrel can not service long time,But bimetallic screw barrel is different,the bimetallic layer could resist the corrosion,make the screw barrel working life longer.We guarantee you the working life is one year,but our customers always use several years.
2.Wear resisting
Some times,we also need to add some materials easy to wear,such as Caco3,or recycled materials,these materials are called bad materials.Common nitrided screw barrel also could not serve you longer. Maybe half year, you need to change one set. In this situation,if you use our bimetallic screw barrel,we can guarantee one year. But our customers always use several years.
We-HUACHEN bimetalilc standard:
1. Standard grade: 38CrMoAlA + nitriding 96 hours
2. Bimetallic grade: 38CrMoAlA + bimetallic alloy
3. HC-A grade: Tungsten carbide 40%
4. HC-B grade: Tungsten carbide 25%
5. HC-C grade: Tungsten carbide 15%
We-HUACHEN Bimtallilc Product Show:
Second hand extruder machine bimetallic screw barrel
Two types of bimetallic screw:
The bimetallic also could divide two types, like the above picture show:
Type 1:Sparying the bimetallic on the screw flight,this is very common in the market. If your plastic material is not very very bad,we suggest you choose this type, because of its economy.
Type 2:Coating the bimetallic on the whole screw,this is new technical these years. The advantage:Working life more longer than type 1,the disadvantage: Price is also very higher than type 1.
Injection molding screw we process as the following technical parameter:
Injection screw barrel ---Technical Parameter: | |
Nitride Case Depth | 0.6mm-0.9mm |
Nitride Hardness | 960-1160HV |
Nitride Brittleness | ≤Grade One |
Surface Roughness | Ra0.4um |
Screw Straightness | 0.015mm |
Duplex Alloy Depth | 1.5mm-3.5mm |
Duplex Alloy Hardness | HRC60-75 |
Chromium Coating Thickness | 0.025~0.10mm |
Injection screw barrel ---Technical Process: | |
Laser Coating Tungsten Carbide | Vacuum Quenching |
PTA Melt-Welding Alloy | Titanizing |
Centrifugal Mould Bimetallic Alloy | Nickel Plating |
Advanced nitrogen oozes handicraft | Chorme Plating |
About Huachen
Factory Show:
Machines&processing show:
Nitrogen oven & Bimetallic Oven show:
Testing:
Certificate:
Our packing:
Other screw&barrels we process:
Our advantages:
1.Our Strength: We have an experience of more than 20 year of manufacturing and designing Plastic machines, varied Screws and Barrels and spares.We concentrate on improving quality, updating design and enhancing service.
2.Our products: Screws Barrels for Injection, Extrusion, and Blow Molding applications; relevant accessories; plastic machinery.
3.Location advantage: Located in China's Screw Town - Jintang Town in Zhoushan City, near to Ningbo Port and Shanghai Port.
4.Market areas: Global sales network reaching South America, Eastern Europe, Southeast Asia, Africa, Oceania and the Middle East.
5.We promise: We assure the customer benefits, We provide competitive price, We Emphasis On Cooperation
We can provide thousands of drawings
We can design for you according to your requirements
We can process according to your drawings.
Please contact us,if you have any questions. Mail,phone,skype all are OK.
My skype:lillianyao0421
