Product Description

One of the key features of the Backward Pumping Kneading Block is its reverse conveying mechanism, which allows for a counter-feed operation. This means that the material is fed into the machine from the opposite end of the screw, resulting in a more efficient and uniform mixing process. This mechanism also reduces the risk of material degradation and ensures a longer lifespan for the product.

The Backward Pumping Kneading Block is made in Sichuan, China, a region known for its high-quality manufacturing processes. The product undergoes rigorous quality control measures to ensure that it meets the industry standards and requirements. The product is treated with polishing and sandblasting to achieve a smooth surface finish and improve its durability.

The Backward Pumping Kneading Block is manufactured to strict tolerances of 0.02 mm, ensuring precision and accuracy in its operation. The product undergoes vacuum hardening, a heat treatment process that improves its strength and durability. This treatment also enhances its resistance to wear and tear, ensuring a longer lifespan for the product.

With a hardness of HRC 58-62, the Backward Pumping Kneading Block is designed to handle even the most challenging materials. This product is ideal for use in various applications, including plastics extrusion, rubber mixing, and chemical processing. Its counter-feed operation and high-quality construction make it an excellent choice for industries that require consistent and reliable mixing processes.

Features

Product Name: Backward Pumping Kneading Block

Features:

Backward Pumping

Kneading

Heating

Application: Twin Screw Extruder

Machinery Test Report: Provided

Standard: DIN, GB, Etc.

Connection method: Spline

Counter-Flow Kneading Block

Backward Flow Kneading Block

Backward Feeding Kneading Block

Technical Parameters:

Tolerances	0.02 mm
product name	Backward Pumping Kneading Block
Hardness	58-60HRC
Brand Name	Nanxiang Machinery
Surface Treatment	Polishing/Sand Blasting
Materials	SAM10/SAM39/WR5/WR14/W6Mo5Cr4V2
Place of Origin	Sichuan , China
Warranty	6 months
Screw Range	Φ 15.6 - Φ 430mm
Suit For	Pharmaceuticals Extrusion Chemical Extrusion Food Extrusion Powder Coating Extrusion

Types of the Screw Segments

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:

WR14 and WR45

Support twin-screw extruder brand

Tool Steel

Production Process

	NO.1   Workblank     Select high-quality raw materials
NO.2   Piecewise According to the drawing section length
	NO.3   Hit bottom hole Rough machining the bottom hole,and then pull spline
NO.4   Machining thread Professional high-end processing equipment,rough machining threads
	NO.5   Finish machining thread
NO.6   Threading grinding Further control of tolerance Length:-0.01mm-+0.01mm OD:-0.03mm-0mm Transition arc:-0.02mm-+0.02mm

Our Service

Product accuracy

There are some differences between Nanxiang 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.

Packing&Delivery

Packing Details: According to your order quantity packaging, shipping wooden boxes, air carton.

Delivery Details: 20-60days after order.

Packing

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.

Customer Trust

Certificate

Why choose us?

Nanxiang Machinery is a specialized manufacturer of precision-machined components for twin-screw extruders, including threaded elements, kneading blocks, mandrels, super-hard screw accessories, and wear-resistant alloy steel sleeves. Our products are widely applied in renowned international brands such as Coperion, Lerstritz, Berstorff, KOBE, and JSW, serving industries like plastics, food, feed, pellet manufacturing, pharmaceuticals, and new energy.

FAQ

Q: Are you a trading company or a manufacturer?

A: We are a manufacturer.

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

A: Our factory is located in Chengdu, Sichuan Province, China. You can fly directly to Chengdu Airport, and we will pick you up upon arrival. We warmly welcome all our clients, both domestic and international, to visit us.

Q: How long will your product last?

A: The lifespan of our products can vary greatly depending on the operation time, materials used, and working conditions. Therefore, it is difficult to provide an exact duration.

Q: Are your quotations all FOB?

A: Yes, all our quotations are FOB (Free on Board).

Q: Can I get a one-year warranty for free?

A: Our standard warranty is not free, but we have confidence in the quality of our products. If you require a warranty, it will be available for an additional cost.

Q: How is your after-sale service?

A: We are committed to providing timely support. If you encounter any issues with our products, you will receive our assistance promptly. We strive to ensure you receive the best service possible.