Matrices

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Matrixes for press granulators are used to form granules from various materials, such as straw, sawdust, cake, animal feed, etc.

The matrix is the most important part of a pellet press, equipment for the production of pellets from wood waste, animal feed, and grass meal. It is through it that the compressed raw material mass is passed under pressure to obtain finished granules. The matrix forms the final product from the initial raw material, and the width of its holes determines the diameter of the granules.

Characteristic

In the process of granulating feed and pellets, the preparation of raw materials and production conditions before pressing are of great importance. The original product must correspond to a matrix with certain parameters:

• length of the pressing channel,
• hole diameter,
• counter drilling,
• the material from which the matrix is made.

Usually, 46Cr13 stainless steel, hardened in a vacuum furnace, is used in the production of dies. These can also be matrices made from “black” steel hardened by cementing the surface.

There are through holes of a special shape (die) located along the diameter of the matrix. Depending on the type of press granulator and the processed raw materials, the matrices differ in outer and inner diameters, width, number and diameter of holes.

Today they produce approximately 400 standard sizes of matrices for different types of granulators. This is a consumable-functioning mechanism on a par with press rollers, which is their main assistant in the production of granules. As a rule, any configuration of a press granulator has its own specific shape and model of the matrix.

Table of recommendations for selecting matrices for different types of feed

Matrix shape: flat and ring-shaped.

Flat matrix granulators are most often used in the production of animal feed. Granulators of this type are easy to maintain. Replacing the pressing rollers and matrix is very simple and can be done quite quickly, in about 20-30 minutes. This is due to accessibility to working mechanisms. The flat die granulator allows continuous operation.

Granulators with a ring matrix have increased productivity compared to granulators with a flat matrix; such granulators exist exclusively in industrial production (production of herbal pellets, fuel wood pellets). They have excellent productivity and excellent quality of the resulting products.

Parameters of the Matrix and pressing rollers – this is one of the main facts in the production of granules.

• Hole diameter: 2; 2.5; 3; 4; 6; 8; 10; 12 mm
• Working surface width: 78/122 mm
• The best steel grades: X46Cr13 and 20СrMnTi.
• Optimal degree of hardening: 54 HRc
• The diameter of the dies is the size of further pellets. The matrices have a diametrical spread from 2 to 19 mm.

• D - inner diameter
• B - overall width
• Pb - width of pressing surface
• d - hole diameter
• Wd - wall thickness

The principle of operation

• Pre-crushed, homogenized material is fed into the matrix from the outside from above, falls into the gap between the inner surface of the matrix and the rollers and is pressed into the holes of the matrix.
• Under the influence of raw materials continuously entering the granulation chamber, the material that has entered the holes gradually moves out through them.
• As a result of the pressure created, the material is heated to a temperature of 100-120 degrees Celsius. At this temperature, lignin and other substances contained in the raw material or added specifically (if necessary) soften.
• From the outside of the matrix, through the holes, ready-made granules come out, which, if the raw material preparation and granulation technology is followed, have high strength and a specific density of 1.1-1.3 (depending on the material).

Advantages

• We supply a wide range of matrices for all brands of granulators: MÜNCH, CPM, Andritz, Buhler, CLM, Van Aarsen, Salmatec, Amandus Kahl, Mechanika Nawrocki, Testmer, ZLSP, Technex, Granteh (GT-500, GT-520), B6 DGV , OGM and others.
• The dies are of the highest quality, made using modern processing machines, and hot processing of high quality X46Cr13 steel.

To select a suitable model, you must specify the required parameters:

1. Brand and type of granulator.
2. Diameter of the channel opening.
3. The total length of the channel.
4. Pressing channel length.
5. Granulated raw materials.

It is possible to produce matrices to order, taking into account the characteristics of the raw materials.

For flat die press granulators, we offer:
- matrices;
- press rollers (rollers or rollers);
- press roller shells
- other spare parts of rollers;
- gearbox spare parts (gears, shafts, etc.);
- engine;
- dispensers and mixers for granulators;
- control panels.

For ring press granulators:
- matrices with different compression ratios, for different products;
- press rollers (with straight and oblique notches), (narrow and wide)
- roller shells;
- spare parts of rollers;
- dispensers (feeders) and air conditioners (mixers) and their spare parts;
- cutting knives;
- granulator caps;
-plates;
- clamps;
- matrix hats;
- faceplates;
- gears, shafts, and other gear parts (main shaft, gear shaft, intermediate shaft, etc.)
- electric motors and gear motors
- control cabinets for press granulators (remote controls with direct start, with frequency converter, ammeter and other equipment, cabinets with smooth start, etc.)