SU903179A1 - Device for impregnating fibrous material - Google Patents

Description

. , .--: The design relates to the processing of polymeric materials and can be used in the manufacture of, for example, glass laminates. The quality of the impregnation, and hence the quality of the material obtained, depends on the initial state of the bundles before impregnation. Before impregnation, the harnesses are in a different state. Some of the strands are formed from strongly glued together continuous filaments. The threads of the scloivaitr with a lubricant applied to the fiber surface, due to long-term storage, in this case a braid, falling into the 1H opacifying vacuum, is impregnated much worse than in the loosened state. When the harness is loosened, beneficent conditions are created for impregnation, both by capillary forces and by forcing the harness. It is known a device for impregnation comprising an impregnating bath, opening mechanism in the form of spring-loaded brushes and means for moving the fibers tH Brushes, affecting the thread, loosen the material. However, to obtain a quality material (especially for electrical needs), the fiber must be dried before impregnation. The closest technical solution to the invention is an impregnation device comprising. a tempering mechanism, a unit for changing the tension of the fibrous material, a loosening chamber, made of two ducts located on both sides of the fibrous material, and an impregnating bath. The tensioning unit of the fibrous material is made in the form of two pairs of rolls. The shafts rotate synchronously from an external drive, while they provide a sagging state of the section of the harnesses located between the outer shaft. The hot air supplied through the air ducts causes the harnesses to make a complicated movement, as a result of which the harnesses are loosened and dried l2l. The disadvantage of this device is that over time, as a result of the slippage of the threads between the shafts, they turn into a sagging state, as well. in tight fit. This reduces the efficiency of loosening the fiber, therefore, the quality of the impregnation, since the impregnation process is uneven. To eliminate this drawback, the operator of the long walls should constantly monitor the sagging of the threads and periodically adjust the drive.

The aim of the invention is to improve the quality of impregnation.

This goal is achieved due to the fact that in the impregnation device, which includes the tempering mechanism, the tensioning unit of the fibrous material, the loosening chamber, two ducts arranged on both sides of the fibrous material and the impregnating bath, the tensioning unit of the fibrous material is made in the form of spring roller, placed in front of the loosening chamber with the possibility of reciprocating movement of perpendicularly processed material on a rack equipped with tsevym switch signal circuit cooperating with a stop with a sharp increase in the pressure roller.

FIG. Figure 1 shows a schematic set of a device for uniform impregnation at the time of the formation of a sagging continuous fibrous material in front of the loosening chamber in fig.

2- device at the time of intensive loosening of the fiber in the chamber; on fig

3- the same, at the moment of a sharp increase in the force on the roller and the switching on of the final switch.

The device consists of a chamber 1, formed by air ducts 2 and 3, and a roller 4 mounted on a rack 5. A spring 6 is placed between the upper part of the rack and the bottom. Limit switch 7 is fixed on the upper part of the rack, and the stop 8 is fixed on the lower part. through orienting combs 9. Impregnating bath 10 co, holds the upper 11 and lower 12 blocks of the orienting elements.

The device works as follows.

From the tempering mechanism 13, the fibers are threaded between the units of the device. and a fibrous material, for example glass fiber, before entering the chamber, is periodically affected by a roller 4, which, together with the rack 5, performs a return-folding movement relative to the plane of the main movement of the fiber (drive stand on features not shown). After the completion of one cycle of movement — a roller 4, from top to bottom and back, the continuous fiber, being in a sagging state in front of Cameron, is drawn into it by the air rroTOKaivM, acting in the direction and perpendicular to the movement of the fiber.

In the chamber 1, the flames are counter-flow of hot air, loosened and dried. Chamber 1 enters a transparent bath in a loosened state, which creates favorable conditions for the oncoming 5 motion (Binding through the fiber at the inlet due to capillary forces. The harness enters into a previously impregnated air with significantly lower air content in the interfibre

About space. In the multi-blade impregnation bath 10, as a result of multiple orerigger strings on blocks 11 and 12, its impregnation is carried out. In the case when one of the harnesses

5 for various reasons, it is not possible to wind off the reel onto the roller 4, as it moves downwards, an increased force acts, which leads to compression of the spring 6, relative movement

0 of the upper and lower parts of the stand. The switch roller 7 rests against the stop 8 and includes a signal circuit notifying the operator that the tow is hooked on the bobbin. To prevent breakage

5. The glass fiber at the same time as the signal circuit is turned on, a signal can be given to turn off the rack drive 5.

This design of the device allows the operator to maintain several installations simultaneously, ensuring the quality of the impregnation.

Claims (2)

Invention Formula A device for impregnating a FIBER material, including a tempering mechanism, a unit for changing the tension of a fibrous material, a chamber section-. 0 loosened, made of two ducts located on both sides of the fibrous material, and impregnated, characterized in that, in order to improve the quality of the impregnation, the tensioning unit of the fibrous material is made in the form of a spring-loaded roller installed in front of the loosening chamber with the possibility of returning translational movement perpendicular to the material to be processed on a rack equipped with a limit switch that interacts with the stop of the signal circuit with a sharp increase in pressure on the roller.  Sources of information taken into account during the examination , 1. USSR author's certificate 0 i, cl. B 05 C 1/03, 1934. 2. USSR author's certificate in ft 2705919 / 23-05, cl. B 05 C 3/12, 1979 (prototype). rr / / ../ /  I // V. . . // Phg / g.Z.