Tool Steel : W6Mo5Cr4V2;
PM-HIP material : SAM10,SAM26,SAM39,CPM10V,CPM9V

For corrision application:
Nitrided Steel: 38CrMoAI;
PM-HIP material : SAM26,SAM39,CPM10V,CPM9V

For wear and corrision application:
PM-HIP material:SAM26,SAM39,CPM10V,CPM9V

Other materials:
Stainless Steel: 316L,904L, C276 etc.

3. Types of the Screw Segments

Convey Screw Segment
Mixing Screw Segment
Kneading Block & Disk
Transition Screw Element
Deep groove transfer element
Screw element for side feeder
1-flighted,2-flighted,3-flighted screw elements

4. Quality Control

a. All the materials are purchased from the domestic brands or Eurpean twin-screw specialty materials suppliers,which tested by elemental analysis and metallurgical inspections to ensure the quality.

b. The internal splines is checked by the spline plug to ensure interchangeability of the elements

c. All components are machined by CNC machines to ensure the shapes and tolerances of the elements

d. Adopt the European high-speed steel powder processing technology,and do the treatment according to the strict heat treatment 4.process to ensure the wear and corrosion performance same as the foreigh brands.

e. Perfessioal technical team can not only provide timely and accurate mapping sample design but also the combination of elements of technical services.

f. There are various prepared technical information and the fitxtures for the various brands extruders to ensure the timely lead time.The common components have a lot of stock, even the new one, it can be delivered within 45days.

g. The modern management system can ensure the products 100% qualified and tracked.

5. Heat treatment

As we all know, heat treatment is very important in the screw production process. In order to ensure the quality of products, Joiner has purchased professional heat treatment equipment to produce, so that we can control the construction process by ourselves.

6. Our strength

They finish machining is carried out before heat treatment, and after heat treatment, the shape of the products are uncontrolled, so they cannot control precision. Our finishing is done after heat treatment, and can eliminate deformation of the parts in the heat treatment, then the precision of gear precision can reach level 6, achieving seamless connection.

7. Equipment

Screw elements making equipments - CNC thread grinding machine, CNC thread milling, CNC knead block grinding machine, CNC forming milling, 4-axis machining center, automatic deep hole grinding machine, CNC car, CNC surface grinding machine, CNC cylindrical grinding machine, CNC band saw, laser marking machine, vacuum quenching furnace, vacuum temper furnace and other 130 advanced equipment. After the raw materials come in, all processing procedures are completed internally.

8. Packaging

According to your order quantities and products sizes to choose wooden boxes or cartons to pack:

1. Rust-proof oil processing,
2. Oiled paper packages,
3. Bubble wrap package,
4. Special foam packaging,
5. Packing,
6. Sealing.