RU55671U1 - ROLLER AND TAPE PRESS - Google Patents

Abstract

The roller and belt press is intended for use in the chemical industry for compaction of asbofriction mixtures and other dispersed materials. The unit is simple in design, provides a stable pressure to back up the mixture into the roll gap, which allows you to get high-quality molded tape at the exit of the rolls.

Description

The proposed utility model is intended for use in the chemical industry for compaction of dispersed materials.

A known machine consisting of sealing rolls, a hopper and a worm feeder for feeding material into the roll gap. (US Patent No. 2548009, cl. 18-9, 1951)

The disadvantages of this device include the low reliability of the worm feeder, due to the effect of "cork formation" when the processed material rotates with the worm, not moving along the screw channel.

Closest to the proposed utility model is a roller-belt press containing vertically arranged sealing rolls and a hopper with a finger feeder for feeding the mixture into the roll gap. (A.S. USSR, No. 1565699. IPC V. 28 V. 1999)

The disadvantages of this device include the low pressure at the inlet of the rolls, due to the discreteness of the helical line of the feeder, which with increasing pressure at the outlet sharply decreases the transporting ability.

The objective of the utility model is to provide reliable stable pressure for feeding the mixture into the roll gap.

The task is achieved in that in a roller-belt press containing vertically arranged sealing rolls and a hopper with a finger feeder for feeding the mixture into the roll gap, the finger feeder is equipped with a single-turn worm nozzle mounted on the end of the feeder.

Constant stable pressure of the mixture in the roll gap is achieved by the fact that the transportation zone is made in the form

finger feeder, and the discharge zone - in the form of a single-turn worm nozzle. To ensure the normal operation of the roller-belt press, the feeder must work in an over-supply mode to create a certain stable mixture supply pressure. In this case, the main force interaction between the compacted mixture and the feeder is carried out in the last turn of the worm nozzle. The mixture supplied with a certain pressure to the roll gap begins to fill the entire screw channel of the worm nozzle and creates a back pressure to the finger feeder, which, with an increase in the outlet pressure, decreases the conveying capacity. As a result, the supply pressure of the mixture into the roll gap is stabilized.

Figure 1 presents the roller-belt press.

The roller-belt press contains vertically arranged sealing rolls 1, 2 mounted on the shafts 3, 4. The lower roll 2 has a pair of bounding flanges 5. In the hopper 6 there is a finger feeder 7 with a single-turn worm nozzle 8.

The device operates as follows.

The mixture enters the hopper 6, where it enters the finger feeder 7, whose fingers are located along a helical line. The finger feeder 7 transports the mixture in an over-supply mode to the discharge zone formed by a single-turn worm nozzle 8, where the main force interaction occurs between the mixture being compacted and the turn of the worm nozzle 8. This creates a certain pressure for feeding the mixture into the roll gap. The feed mixture, being compressed in the channel of the worm nozzle 8, creates counter-pressure to the finger feeder 7, in which the transporting ability decreases with increasing outlet pressure. As a result, the feed pressure in the roll gap is stabilized, which allows to obtain a well-formed tape at the exit of the rolls.

Claims (1)

A roller-belt press containing vertically arranged sealing rolls and a hopper with a finger feeder for feeding the mixture into the roll gap, characterized in that the finger feeder is equipped with a single-turn worm nozzle mounted on the end of the feeder.