Second hand extruder machine bimetallic screw barrel

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:
We-HUACHEN Bimtallilc Product Show:


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.

Barrel bimetallic:

Two types of bimetallic barrel:
About the bimetallic barrel,we also have two types:
Type 1,Groove bimetallic,we will make a groove on the barel first,then spary the bimetallic on the groove.
Type 2.Centrifuge casting.Bimetallic will attach to the inner wall of barrel equably.

We-HUACHEN Product Show:

Bimetallic screw

Bimetallic barrel

Walk into HUACHEN'S Workshop:

Bimetallic barrel processing (Centrifuge casting):

Bimetallic screw processing


Material for Bimetallic screw and barrel
Application:
Rubber,various high glass fiber, mineral fiber and PPA,PPS, PA6T, LCP,VO fire protection, ferrous power, magnetic powder and etc. Meanwhile,Used for PVC + 30% CaCo3, recylced plastic material.


Technical Parameter

Hardness after Hardening&tempering:	HB280-320
Nitrided Hardness:	HV900-1050
Nitrided Case Depth:	0.5-0.8mm
Nitrided Brittleness:	Less than Grade 2
Surface Roughness:	Ra 0.4
Screw Straightness:	0.015mm
Surface Chromium-plating's Hardness After Nitriding:	≥900HV
Chromium-plating Depth:	0.025~0.10mm
Alloy Hardness:	HRC56-65
Alloy Depth:	0.8~2.0mm
Bimetallic Thickness:	2-5mm
Bimetallic Hardness:	HV950-1100

About HUACHEN

Zhejiang HUACHEN screw co.,ltd. is one of the biggest SCREW BARREL manufactory in Zhoushan city,Zhejiang of China. HUACHEN brand screw barrel are welcomed by new and old customer from domestic and overseas,because of its perfect quality and professional technical.
Besides extruder screw barrel, we also produces many many sets of injection screw barrel, conical twin screw barrel,parallel twin screw barrel,rubber screw barrel,planet screw barrel and so on.
All the above screws and barrel could choose nitrided treatment,bimetallic treatment,tungsten carbide treatment and so on.

HUACHEN SCREW CO.,LTD. PHOTO




Machines of HUACHEN SCREW CO.,LTD.









,.