The heating shoe lies below, as on professional hot mangles. Heat distribution is perfectly even. Even the most demanding fabrics are smoothed gently and easily. An analysis of two material (calcium hydroxide and cooper concentrate mixture) models and four peripheral roller speeds (from 0.1 up to 0.3 m/s) showed that the stress distribution characteristic is mainly related to the geometry of the forming elements. For calcium hydroxide, the maximum stress amplitude on the groove surface is 30 MPa, and on the surface of the formed cavity, 45 MPa. For a mixture based on copper ore concentrate, the maximum amplitudes are 46 MPa and 59 MPa, respectively. Modelling performed for four values of the circumferential speeds of the rollers shows that the average stress values for calcium hydroxide are in the range of 25÷28 MPa, and for a mixture based on copper ore concentrate, 36÷40 MPa.

Rollers with stud lining comprise a special pattern of extremely wear resistant tungsten carbide studs which are inserted into the roller surface. The stud arrangement is designed to also form an autogenous wear protection layer from ground material. Thus, stud lining rollers achieve highest lifetimes without any need for regular surface maintenance in grinding applications that do not contain oversized feed material.

Application

If the Hydraulic Roller Press is used for finish grinding in a closed circuit with the two-stage separator system, the need for other grinding equipment is eliminated. The reliable Hydraulic Roller Press outperforms ball mills and vertical mills when it comes to finish grinding. Differences in the stress distribution on the forming cavity surface and the groove are reduced to the maximum stress distribution on the briquette surface. For the forming cavity, the maximum values fall on the outer sections and take similar values along the entire height of the briquette. At this point, the very high-stress values coincide with the edge wear of the work roller surfaces seen in roller presses. On the other hand, on the groove surface, the maximum stresses for a given width fall on the axis of the briquette, and their maximum values occur only on its upper part. The stress distribution in the forming groove is much more uniform and has a smaller amplitude. For calcium hydroxide, the maximum stress amplitude on the groove surface is 30 MPa, and on the surface of the formed cavity, 45 MPa. For a mixture based on copper ore concentrate, the maximum amplitudes are 46 MPa and 59 MPa, respectively. A complete model of material compaction in a roller press was developed, which makes it possible to determine the process’s power parameters and the material compaction’s characteristics, taking into account the characteristics of its constituent particles.

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Applications

In addition to standard height cutters, ARROW CUTTERS has considerable expertise in manufacturing label process tools, in variety of rule heights from 6mm to 12mm rule. The disadvantages of the Katashinsky slab method are that it does not consider the change in the coefficients of friction in the material with increasing compaction pressure. In addition, they solve the flat problem of stress–strain analysis. However, the slab method continues to evolve, as shown among other things by Hryniewicz in the 1990s [ 30]. The reason is its flexibility and simplicity of software implementation.

These cutters can also be designed to work in conjunction with a wide variety of other tooling – some of which ARROW CUTTERS can also produce. For instance cutters that need to work in conjunction with dedicated thermo-forming tooling. Or tooling that requires matching machining jigs.

Machinery

At ARROW CUTTERS we appreciate that perfect joins are essential for producing good quality Foam and Rubber products. And have developed specialist equipment to guarantee perfect joins at all rule intersections.

ARROW CUTTERS has an unsurpassed international reputation for manufacturing superb quality cutters for Roller Press use.

High grinding efficiency, increasing production and energy saving. In the ball mill, the material is subjected to pressure and shear, which is the combined effect of these two forces. In a roller press, the material is only under pressure. Tests have shown that during the crushing process of the particulate material, the strain generated by applying onlypure pressure is equivalent to five times the strain generated by the shear force. steam levels to choose from! The steam is distributed evenly from below for good fabric penetration. Even the most stubborn wrinkles just disappear. You can choose between constant steam or just a burst of steam, as needed. The experimental tests indicate a decrease in the strength of briquettes with an increase in the speed of the peripheral rollers. It was not observed in the simulation. This is due to the assumptions made in the model. In part that reputation is because ARROW CUTTERS undoubtedly maintains the most advanced workshop facilities for producing high-rule cutters in the UK. But it is also in recognition of ARROW CUTTERS involvement, in introducing or developing almost every innovation now commonly used within this toolmaking discipline.