SU127002A1 - Machine for the production of canvas from harness fiberglass - Google Patents

Description

Machines for the production of canvas from harness glass fibers are known, including a device for chopping a rope into a staple, a belt conveyor with a vacuum chamber for forming the canvas and a roll-up device for rolling the canvas into a roll.

The described machine for the production of canvas from fiberglass harness differs from the known ones in that the device for chopping the harness is connected to the receiving hopper by means of a pipeline, which is successively expanded and provided with an input for supplying compressed air.

The bunker is located above the entrance of the belt conveyor, in the middle of which an actual camera is installed. Sealing rollers and circular knives FOR slitting the canvas before winding it into rolls on the roll-up device are mounted behind the camera during the process of making the canvas. To create air turbulence and cross-feed of compressed air jets, pipes are installed in the upper part of the upper part of the hopper. Vibrating sprays and a box with a tray and a sieve are mounted near the lower part of the bunker to apply liquid and powdered binding substances to the CANDER. Such constructive execution of the machine preserves the quality of the glass fiber, allows to obtain a compacted isotropic canvas and improves sanitary and hygienic working conditions.

The drawing shows a diagram of the machine.

A glass fiber bundle, consisting of a large number (from 20 to 120) of primary glass filaments, is threaded into one or more ends of a harness cutter for a staple, which has: a tension device /, a metal self-loading roller 2, a rubberized roller,

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roller 4 with knives made of high-alloy steel. The harness 5, unwound from bay 6, is clamped between rollers 2 and 5 and passes at a speed of 100 m1 min between rollers 3 and 4. The distance between the axes of rollers 3 to 4 is such that the blades of roller 4 are pressed into the rubber coating of roller 3 at a depth of a few tenths of a millimeter.

Getting between the Iozhi and rubber, the bundle is bent at an angle equal to the angle of sharpening the knives, and the staples are cut to the same length.

A strong air jet (pressure m185 mm water column), the exit from the inlet 7, creates a vacuum in the pipe 8, as a result of which the fiber sections are directed from the pipe 8 to the pipe 9, and since the diameter of the pipe 10 is larger than the diameter of the pipe 9 and consistently increases, then the air flow from the pipe 9 to the pipe 10 with the wire sections dramatically reduces the speed moving and the sections are split into separate threads. When the pipeline 10 exits into the receiving bin 11, the velocity of the air flow decreases again, as a result of which the segments are completely disintegrated into separate threads. The thread of the threads is affected by two cross-jets of compressed air, exit w: them from two pipes 12 and 13, located in the upper part of the bunker 11, in which, throughout its entire volume, the cylindrical part of the thread is in the mass of air. The air seal, with glass filaments, condenses in the conical part of the hopper 11, passes the space between the lower end of the bunker and the horizontal net conveyor. 14 and rushes into the suction duct 15, where the air depression reaches 150 mm. Conveyor 14 retards the filaments flying along with the air, which are deposited on it in the form of a uniform layer along the horizontal plane. The arrangement of the threads in the layer itself is chaotic. This arrangement of the threads in the layer on the conveyor ensures the isotropy of the physicomechanical properties of the rigid canvas. The powdered binder is fed to the formed canvas between the hopper 11 and the drying chamber 16 by means of vibrating pulpers 17. From the box 18 through the tray 19 the powdered binder flows into a 50-mesh sieve. whose width is equal to the width of the hard canvas being produced. Box 18, tray 19 and sieve 20 are rigidly connected to an electric vibrator. A suction chamber 21 is installed at the point of supply of the powdered binder under the upper branch of the conveyor 14; the air in the vacuum chamber 21 with a vacuum of 60-80 mm water. Art. draws the binding substance into the layer of the canvas.

In the application of the liquid binder, the canvas is conveyed by the conveyor 14 to the drying chamber 16, in which air is recirculated and partially emitted to the atmosphere. The chamber 16 is provided with tubular electric heaters 22 placed above the conveyor 14.

Having passed the drying chamber, the air temperature of which is 180-230 °, a layer of threads with a liquid binder is turned into a hard canvas.

In the case of use as a resinous binder powder, air recirculation c. no drying chamber; dry particles of the powdered binder are softened by the action of heated air. After the drying chamber 16, a layer of filaments under the influence of a pair of hollow rollers 23, provided inside with electric heating elements; The temperature of the rollers can be increased to 250 °; wiring between rollers is easily adjustable; after the rollers 23 have passed, a layer of filaments containing a powder-like binder is transformed into a rigid canvas.

Depending on the requirements imposed on a rigid canvas of fiberglass, it is possible to obtain a canvas of one or another width. For this purpose, disk knives 25 of high-alloy steel are mounted between the rollers 23 and the rolling friction device 24.

Subject invention

A cloth for making canvas from fiberglass harness, including a device for chopping a rope into a shtapel, a belt conveyor with a vacuum chamber for forming the canvas and a rolling device for rolling the canvas into a roll, characterized in that, in order to maintain the quality of the fiber, to obtain a compacted isotropic canvas and to improve sanitary and hygienic conditions, the harness chopper is connected in series with an expanding and equipped compressed air inlet with a receiving hopper, located above the entrance part of the belt conveyor, in the middle part of which there is an existing chamber, behind which sealing rollers and disk knives are mounted for slitting the canvas before winding it into rolls on the rolling device, and to create air turbulence inside the receiving bin in its upper part pipes for cross-feeding of compressed air jets, and vibrating sprays and a box with a tray and a sieve for applying liquid and powder-like ties to the canvas are mounted near the bottom of the bunker their substances.

No. 127002