2. Screw Materials:
1. For wear application:
Tool Steel : W6Mo5Cr4V2;
PM-HIP material : SAM10 SAM26 SAM39 CPM10V CPM9V
2. For corrision application:
Nitrided Steel: 38CrMoAI;
PM-HIP material : SAM26 SAM39 CPM10V CPM9V
3. For wear and corrision application:
PM-HIP material:SAM26 SAM39 CPM10V CPM9V
4. Other Materials:
Stainless Steel: 316L, C276 etc.

3. Making process

4. Quality Control
a. Materials control: All the materials are purchased from the domestic brands or European 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 foreign brands.
e. Professional 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 fixtures 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. Product accuracy
There are some differences between Joiner Machinery and Nanjing's production technology. Their finishing process is carried out before heat treatment, and the deformation after heat treatment is not controlled, so their accuracy is not easy to control. But our finishing process is carried out after heat treatment, which can eliminate the deformation of parts in heat treatment, so the precision is higher, and thus can achieve zero seam connection.

6. Production and Inspection of Equipment
We also have advantages in production equipment and inspection equipment.
Joiner has 70 advanced equipments such as CNC thread grinder, CNC thread milling, CNC kneading block grinder, CNC forming milling, 4-axis machining center, automatic deep hole grinder, CNC lathe, CNC surface grinder, CNC external grinding, CNC band saw, laser marking machine, vacuum quenching furnace and vacuum tempering furnace. After the raw materials enter the market, all the processing procedures are in-house.

7. Our services

We have a professional sales team who can quickly understand the real needs of customers, and put forward reasonable solutions for them. The company not only offers supportive services for both domestic and foreign brands, but also provides retail services to outstanding end customers in the industry. Now Joiner products are exported to more than 30 countries including countries such as Europe and America.

8. Packing

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

a. Rust-proof oil processing,

b. Oiled paper packages,

c. Bubble wrap package,

d. Special foam packaging,

e. Packing,

f. Sealing.

9. FAQ

Q: Are you trading company or manufacturer ?

A: We are factory.

Q: Where is your factory located? How can I visit there?

A: Our factory is located in Chengdu, Sichuan Province, China. You can fly to Chengdu Airport directly. We will pick you up when you arrive in the airport; All our clients from domestic or abroad are warmly welcome to visit us.

Q: What is your terms of payment ?

A: 1) T/T 2) L/C;