SU1207797A1 - Roller press for powder materials - Google Patents

Description

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The invention relates to mechanical engineering and can be used in the chemical, pharmaceutical and chemical industry and the metallurgical industry.

The purpose of the invention is to improve the quality of the product.

FIG. 1 shows a roller press, cross section; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a diagram of the destruction of compressed tape

The roller press consists of two drive (drive not shown) counter rotating rollers 1 and 2, a hopper 3 and a preliminary grinding device, which is made in the form of a row of plates 4 with grooves 5 mounted on two parallel bars 6 and 7.

The width of the grooves 5 is chosen equal to 1.05-1.3 gap between the rollers and, accordingly, the thickness of the compressed tape,

The press works as follows.

The powder material from the hopper 3 is fed to the rollers 1 and 2 and compressed into a belt.

The tape rests against the end of the groove 5, is compressed and collapses.

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at the same time, along the sliding lines (Fig. 3), be divided into strips with a cross section of up to 6x6 mm and a length determined by the distance between the plates 4.

The nature of the destruction of the tape is determined close to the required and, moreover, stable dimensions of the obtained granules without over- and undergrinding of the compressed material, when additional grinding of coarse fractions and re-processing of small fractions of the product is required.

The absence of the need for reprocessing makes it possible to increase productivity and reduce the energy intensity of the pressing process.

Compressed condition of the tape from the moment of its formation to destruction determines the exposure of the compressed material under compressive load, which increases the density and strength of the resulting product.

The choice of the width of the groove 5 in the plates 4, equal to 1.05-1.3 gap between the rollers, ensures the free movement of the tape in the groove and the lack of stability of the compressed tape.

VNIIPI Order 142/20 Circulation 597 Subscription Branch ShSh Patent, Uzhgorod, Proektna St., 4

Claims (5)

1. ROLLER PRESS FOR POWDER MATERIALS, containing two counter-rotating cylinders, and the grooves are made with a ratio of their width to the gap between the rolls of 1.05-1.3. 2. Press pop. ^ characterized in that the plates are fixed on two parallel bars symmetrical with respect to the press. § FIG. j along the slip lines (Fig. 3), divided into strips with a cross section of up to 6x6 mm and a length determined by the distance between the plates 4. 5 The nature of the destruction of the tape is determined by the close to the required and, moreover, stable sizes of the obtained granules without over- and under-grinding of the compressed material, when additional grinding of large fractions and re-processing of small fractions of the product is required. The absence of the need for re-processing allows you to increase productivity and reduce the energy intensity of the pressing process. The compressed state of the tape from the moment of its formation to failure determines the exposure of the pressed material under a compressive load, which increases the density and strength of the resulting product. 25 The choice of the width of the groove 5 in the plates 4, equal to 1.05-1.3 of the gap between the rollers, provides free movement of the tape in the groove and the lack of stability of the pressed tape.