Crusher Parts of Mantel and Concave, Bowl Liner

Features:

*The service life is based on Sinova’s R&D Lab data and for 5TPH and 10TPH twin screw extruding machines only. The actual life is decided by several factors such as operation level, raw material quality, formula composition etc.

Why Sinova:

**For new products, it will take 45 days to finish the manufacturing, based on Sinova’s experience.

Advantages:

Raw material

D2(Cr12Mo1V1) alloy steel, durable for high impact, pressure and temperature(1100F/1900F), is applied as the raw material of extrusion screw.

Accurate processing

Processed with CNC grinding, shape error is within ±0.015; kneading piece to piece tolerance is within ±0.03; the length tolerance is within ±0.01; the surface roughness is less than Ra0.4.

FAQ:

1. Q:How is extruded aqua feed processed?

A:High quality ingredients (fish meal, cereals, vegetable proteins …) are selected and ground according to the specific nutritional and pellets size requirements of the aquatic animals.

The particle size distribution is a key factor for premium granulates production: therefore the grinding step is an important unit operation. The powder is then

mixed with minor ingredients such as vitamins, minerals, amino acids and functional additives etc. before preconditioning.

Next, the heart of the process, extrusion cooking is done in three stages in the fish feed machine: preconditioning, extrusion cooking and die texturing/ shaping. Single/twin-screw extrusion-cooking uses its perfect mixing ability and parameters control such as shear, temperature, residence time to reach the highest physical and nutritional standards. Through direct steam injection, venting device and efficient barrel cooling, adjustable screw speed, screw configuration, shear and temperature conditions are perfectly controlled; this leads to optimized functional and nutritional pellet properties such as the bulk density, calibration, cooking degree, best ratio proteins- lipids, etc.

2. Q:Why extrusion is so popular for aqua feed and pet food?

A: Because it almost integrates functions of different equipments in a single process when extruding, the procedures of mixing, extruding, cutting, cooking, forming and drying process in a certain degree can be carried out at the same time.

With special screw combination, very less simple change to the screw configuration or processing parameters are required to make various products.

It is very difficult or impossible to make the products and products in certain shape produced with extrusion technology.

Extrusion is extremely effective for high-temperature and short-period processing; it is provided with a better nutrition improvement while effectively reducing different anti-nutritional factors in products and sterilizing.

The cooking process of the extrusion can ripen the material at a great degree, sufficiently use the steam and reduce the power consumption, thus the process cost can be saved.

The extrusion can effectively avoid the industrial waste water; this is an outstanding advantage for the feed manufacturers to bear the increasing pressure for reducing the influences of production activities on surrounding environment.

3. Q:How many kinds of extrusion screw are required for the extrusion?

A:Usually to meet the demand of extrusion, there are screws in the combination as followed: feeding cone screw, kneading screw, ripening screw and discharging screw, with different screw pitches.

4. Q:What is the raw material of extrusion screw?

A:Sinova uses D2 tool steel as the raw material of extrusion screw. D2 Tool Steel is a versatile high-carbon, high-chromium, air-hardening tool steel that is characterized by a relatively high attainable hardness and numerous, large, chromium-rich alloy carbides in the micro-structure. These carbides provide good resistance to wear from sliding contact with other metals and abrasive materials. Although other steels with improved toughness or improved wear resistance are available, D2 provides an effective combination of wear resistance and toughness, tool performance, price, and a wide variety of product forms.

The following table shows the chemical composition of D2 tool steels.

The physical properties of D2 tool steels are outlined in the following table.

The mechanical properties of D2 steels are tabulated below:

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