JP3218901B2 - Squeeze roller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a squeeze roller used mainly for squeezing a fiber tow, and more particularly, to a reduction in the life of the roller due to thermal deterioration, prevention of bearing seizure due to heat generation inside the roller and liquid infiltration into the roller. And a squeeze roller capable of operating stably for a long period of time.

[0002]

2. Description of the Related Art When squeezing synthetic fiber tow, a squeeze roller using rubber is generally used. It is desired that such a squeeze roller has an excellent drawing effect and is operated stably for a long period of time.

[0003] Conventional squeeze rollers increase the pressing force to increase the squeezing effect.
The surface temperature of the roller increased due to slippage with the toe, heat generation of the bearing, and the like, and rubber peeling and cracking occurred due to thermal fatigue, and bearing seizure was easily caused due to heat generation inside the roller. For this reason, the pressing force of the roller was standardized so as not to increase it further, but it was operated with dissatisfaction with the drawing ratio.

The conventional squeeze roller is provided with an oil seal to prevent the squeeze liquid from entering the inside. However, a single thread or scum that has fallen from the tow bites into the oil seal, and the liquid enters the roller from there. The bearing rotation was poor, causing trouble frequently. In response to this, measures were taken, such as changing the type of oil seal and doubling it, and adding a step to the shaft to make it difficult for liquid to enter the interior, but it was still unsatisfactory.

[0005] As described above, the conventional squeeze roller easily causes a trouble, and the period until the trouble is caused is one.
Since the service life varies from a week to three months, it is difficult to estimate a regular replacement cycle of the squeeze roller, and it is necessary to perform post-maintenance work, which causes a trouble in the middle of the production and causes a decrease in production efficiency.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned state of the art, and has as its object to reduce the life of a roller due to thermal deterioration, to seize bearings due to heat generation inside the roller, and to reduce the roller. An object of the present invention is to provide a squeeze roller that prevents liquid intrusion into the inside and operates stably for a long period of time.

[0007]

Means for Solving the Problems The present inventors have made intensive studies to achieve the above object, and as a result, have finally completed the present invention.

That is, the present invention comprises a roller shaft and a roller rotatably held at both ends of the roller shaft, and a squeeze having a hollow region between the roller shaft and the roller. In the roller, a gas introduction opening in which the roller shaft portion reaches the center of the roller shaft portion from one or both end surfaces, and a gas discharge opening in the roller shaft surface through communication with the introduction opening in the roller shaft center portion. A hole, wherein the roller portion communicates with the hollow region and has a plurality of outlet openings that are opened at both end surfaces of the roller portion, and the outlet opening hole is formed at the same time that gas is blown into the squeeze roller from the gas introduction opening. A squeeze roller characterized in that heat inside the roller is dissipated to the outside by discharging gas from the squeeze roller.

In the squeeze roller of the present invention, the pressure inside the roller is preferably set higher than the atmospheric pressure. This is to prevent the squeezed liquid squeezed on the roller surface from entering the inside of the roller. In addition, in order for the squeeze roller of the present invention to more effectively dissipate heat inside the roller, it is preferable to previously cool the temperature of the gas blown into the roller to below room temperature.

[0010]

The squeeze roller of the present invention constructed as described above blows gas into the inside of the roller from at least one opening and simultaneously discharges gas from the opening through the outlet, thereby immediately transferring the heat inside the roller to the outside. To dissipate,
It is possible to effectively avoid troubles caused by a rise in the roller surface temperature and heat generation of the bearings, and as a result, the life of the squeeze roller can be significantly extended. This works more effectively by cooling the temperature of the gas blown into the roller to below room temperature as described above.

Further, since the squeeze roller of the present invention can set the pressure inside the roller higher than the atmospheric pressure, even if the squeezed liquid squeezed on the roller surface tries to enter the inside of the roller, the pressure between the inside of the roller and the outside air pressure is not equal. The difference acts to push the liquid to the outside, so that there is virtually no bearing trouble due to the penetration of the squeeze liquid into the roller.

[0012]

EXAMPLES The squeeze roller of the present invention will be described with reference to the following examples, but the present invention is not limited to these examples.

FIG. 1 is a front view showing a state in which the squeeze roller of the present invention is attached to a drawing device. FIG.
As can be seen from the drawing, when the squeeze roller of the present invention is mounted on the drawing device, the squeeze roller 2 and the bottom roller 3
And tow 4 is squeezed by the pressure between
The squeeze roller 2 is moved up and down by two air cylinders 1 to adjust the pressing load against the bottom roller 3, while the bottom roller 3 is driven by a motor to push out the tow 4. Incidentally, assuming that the pressing load by the squeeze roller 2 is uniformly applied to the width direction of the tow to be squeezed, the load applied per 1 cm width of the tow to be squeezed is 100 (kgf).

FIG. 2 is a cross-sectional view of the squeeze roller according to the present invention as viewed from the front with the squeeze roller attached to the drawing device. The squeeze roller shown in FIG. 2 has 17 holes penetrating into the hollow portion, and among them, one gas introduction hole 7 for blowing gas into the inside of the roller is provided on the right end face of the roller shaft, and one exit hole for discharging gas. As shown in the side view of the squeeze roller in FIG. In this case, the size of the gas introduction opening is 16 mm in diameter, and the size of the outlet opening is 5 mm in diameter.

In the squeeze roller of the present invention, the gas introduction opening connects the pipes using a joint called a rotary joint when gas is blown into the roller.
It is preferable to arrange on one or both end surfaces of the roller shaft. In order to prevent uneven cooling due to one-sided flow of gas, the outlet openings are arranged on both end faces of the roller, and at the same time, two or more pieces are symmetrical (360 ° equally divided) in each plane.
It is preferable to arrange them in

The flow of gas in the roller will be described with reference to the sectional view of the squeeze roller shown in FIG. 2. Gas blown from the gas introduction opening 7 on the right side of the roller flows to the left side toward the center of the roller. When the gas reaches the center, the gas is divided into eight directions parallel to the side of the roller so as to be evenly divided by 360 ° and heads toward the roller surface. Then, the gas splits right and left to cool the roller surface evenly, and is squeezed. The rollers are discharged from outlet openings 8 provided on the left and right side surfaces of the roller.

The method of supplying the gas into the roller is not particularly limited. For example, dehumidified and dried compressed air can be supplied by using a compressor. The supplied gas is most preferably air in terms of cost, but other nonflammable gases such as nitrogen can also be used.

The squeeze roller of the present invention is mainly composed of a roller shaft, a roller, a bearing 5 and an oil seal 6. The roller shaft has a gas introduction opening 7 and an opening 7 as shown in FIG. There is a gas passage from the roller shaft to the roller shaft surface through the center of the roller shaft, and the roller is uniformly cooled on the roller surface as shown in FIG. A passage to 8 is provided. The bearing 5 is provided such that the roller portion follows the bottom roller and rotates smoothly without friction. Further, the oil seal 6 is provided to prevent liquid from entering into the roller, similarly to the conventional squeeze roller.

The surface of the roller portion is preferably made of a rubber 9 such as nitrile, butadiene, urethane or the like because of its gentleness to fibers. However, when squeezing other than fibers, a metal or resin roller can also be used. . The optimum temperature of the rubber surface or the temperature of the bonding surface of the roller portion basically depends on the heat resistant temperature of the rubber or the adhesive. In the conventional squeeze roller, the rubber surface temperature was as high as 90 ° C. and the temperature of the rubber bonding surface was as high as 80 ° C., but the squeeze roller of the present invention can be set to 60 ° C. or less.

The gas blown into the roller is generally 25 ° C. in summer and about 8 ° C. (room temperature) in winter. To effectively lower the temperature of the surface of the roller, the temperature of the gas blown into the roller is important. Is pre-cooled to below room temperature. The method of cooling the temperature of the gas is not particularly limited. For example, after cooling using a multi-tubular heat exchanger (including some dehumidification when the temperature falls below the dew point due to the cooling effect), the dehumidifying device is further added. May be used.

The squeeze roller of the present invention can be operated with the pressure inside the roller set higher than the atmospheric pressure in order to prevent the squeezed liquid squeezed on the roller surface from entering the inside of the roller.

In this case, the pressure inside the roller is preferably about 0.01 to 0.1 (kg / cm ² ) as a gauge pressure, and the value depends on the gas passage resistance.
It can be determined in consideration of the relationship between the gas supply amount and the outlet opening cross-sectional area. For example, assuming that the gas supply amount is constant, the pressure inside the roller is higher as the total cross-sectional area of the gas outlet opening is smaller, while if the gas cross-sectional area of the outlet opening is constant, the internal pressure of the roller is higher as the gas supply amount increases. Can be set high. The supply amount of the gas varies with the cross-sectional area total value of the outlet apertures, but 20 to 40 per hour ^{(m 3).}

[0023]

According to the squeeze roller of the present invention, the heat inside the roller is carried out by gas to the outside and dissipated by the above structure, so that the rise of the roller surface temperature due to heat storage and the heat generation of the bearing can be suppressed. , And the trouble accompanying it can be effectively avoided. This is more effectively achieved by cooling the temperature of the gas blown into the rollers to below room temperature.

Further, the squeeze roller of the present invention can set the pressure inside the roller higher than the atmospheric pressure. Therefore, it is possible to prevent the squeeze liquid from entering the inside of the roller due to the pressure difference from the outside, and to prevent bearing trouble. Can be substantially nil. Further, the above-mentioned troubles can be effectively prevented, and at the same time, the life of the squeeze roller becomes constant, parts can be replaced by predictive maintenance, and the production efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of a state in which a squeeze roller of the present invention is attached to a drawing device.

FIG. 2 is a cross-sectional view of the squeeze roller of the present invention as viewed from the front with the squeeze roller attached to a drawing device.

FIG. 3 is a left side view showing a state where the squeeze roller of the present invention is attached to a squeezing device.

FIG. 4 is a view showing a roller shaft portion of the squeeze roller of the present invention.

FIG. 5 is a view showing a roller portion of the squeeze roller of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air cylinder 2 Squeeze roller 3 Bottom roller 4 Toe 5 Bearing 6 Oil seal 7 Gas introduction opening 8 Exit opening 9 Urethane rubber

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) D06B 23/02 D06B 15/02 F16C 13/00

Claims (3)

(57) [Claims] 1. A squeeze roller comprising a roller shaft portion and a roller portion rotatably held at both ends of the roller shaft portion, and having a hollow region between the roller shaft portion and the roller portion. The roller shaft is provided with a gas introduction opening reaching the center of the roller shaft from one or both end surfaces, and a gas discharge opening communicating with the introduction opening of the center of the roller shaft and opening the surface of the roller shaft. The roller unit communicates with the hollow region and has a plurality of outlet openings that are opened at both end surfaces of the roller unit, and simultaneously blows gas into the squeeze roller from the gas introduction opening and simultaneously releases gas from the outlet opening. A squeeze roller characterized by dissipating heat inside the roller to the outside by discharging the squeeze roller. 2. The squeeze roller according to claim 1, wherein the pressure inside the roller is set higher than the atmospheric pressure to prevent the squeeze liquid on the roller surface from entering the inside of the roller. 3. The squeeze roller according to claim 1, wherein the temperature of the gas blown into the roller is cooled below room temperature.