SU1335539A1 - Fibre-forming device for producing for staple fibre - Google Patents

Abstract

The invention relates to ejection devices for producing staple fibers by races / melt blown method. The aim of the invention is to increase the productivity and quality of the finished product by forming a flat melt jet with the Bord 1 nozzle for a rectangular purpose. According to the cross section of the melt jet, the inlet 4 of the device is made, the working nozzle 5 is made as a set of flat and axis-shaped Laval nozzles oriented at different angles to the axis of the device, the fiber-forming chamber 7 is made in the form of a truncated cone with a cross-section in the form of remote semicircles. At some distance from the back cover 10, there is a mixer 8 with side openings 9, the axes of which form an acute angle with the axis of the device. 3 il. i (L. L I Emerousa Fig. t

Description

The invention relates to the production of staple fibers, and more specifically to ejection type devices for producing fibers by the melt blown method.

The aim of the invention is to increase the productivity and quality of the finished product.

Fig, 1 shows a device, a longitudinal section in perspective; FIG. 2 is a section A-A in FIG. 1; FIG. 3 is a section BB in FIG. 1,

The fiber-forming device contains nozzles 1 forming a flat structure of the melt 2 flowing out of the melting furnace, an inlet opening A located in the front section 3, through which the melt is fed into the zone of action of the flat 5 and axisymmetric 6 Laval nozzles, the fiber-forming chamber 7, the mixer 8 for 8 holes 9, remote from the rear cover 10, where there is an opening 11 for inserting an energy carrier into the device, and between the front 3 and rear 10 covers there is a cavity 12 supplying a power source to the working nozzle.

The device works as follows.

The energy carrier (steam, compressed air) enters the device through the opening 11 and through the cavity 12 is supplied to the nozzles 5 and 6, which form the flow of energy carrier in the fiber-forming chamber 7. From the nozzle 1, a flat jet of the melt 2 is exhausted. The fiber-forming device is led to the jet at an angle of 90, which forms the device axis and the plane of the jet. Under the action of ejection force, the melt 2 jet is sucked into the inlet 4 and enters the zone of action of nozzles 5 and 6. By interacting with the flow of energy carrier, the jet is destroyed into separate drops

the melt which enter the fiber-forming chamber 7, where fibers are formed from them. With the passage of the total mixer 8, an ejection effect is created by trapping ambient air through the holes 9, which leads to a leveling flow and allows to obtain a uniform total flow at the exit of the fiberising device.

Claims (1)

Invention Formula A fiber-forming device for producing staple fibers, including nozzles for forming a melt jet, a housing with an opening for introducing the melt, a nozzle for accelerating the energy carrier, a fiberization chamber and a mixer, characterized in that, in order to reduce the productivity and quality of the finished product, nozzles for forming a melt jet made in the form of a Borda nozzle, the hole for melt introduction is in the section in the form of an ellipse, the nozzle for accelerating the energy carrier is in the form of oppositely located packages Laval nozzles, between which the axially symmetric Laval nozzles, concentric to the axis of the device at an angle of no more than 8 and mismatched by an angle of 4-6 °, are arranged concentric with the melt injection hole, the ellipse-shaped output section is in the same plane with a smaller base of the truncated cone of the fiber-forming chamber, the cross-section of which has the shape of an ellipse, and the mixer is located concentrically with the output section of the fiber-forming chamber and is made in the form of a cylinder with lateral axes Versions, whose axes form an angle with the device, equal to 16-22 °, .g eight Fig.Z