JP3340829B2 - Hot roll press device for smoothing the surface of endless belt and heat setting method using this press device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot roll press apparatus for smoothing the surface of an endless belt, particularly a wide and thin endless belt such as a woven fabric for paper making, where surface smoothness is important. The present invention relates to a heat setting method using a hot roll press device.

[0002]

2. Description of the Related Art A hot roll press apparatus for smoothing the surface of an endless belt and a heat setting method using the hot roll press apparatus have been proposed in the past and are known to be effective. However, in the conventional proposal, heating and pressing are performed between a drive roll or a tension roll, which is a roll of the heat setting device, and a hot roll having a surface length substantially the same as these rolls. In addition, it was impossible to heat and pressurize the endless belt having a large width such as 1 mm or less in thickness and uniform thickness in the width direction.

[0003] This is because it is very difficult to apply the same pressure while maintaining a very small distance between the rolls over the entire width of the rolls due to the flatness and deflection of the rolls. In particular, in the case of a papermaking fabric, if the thickness differs by 10 μm or more, there is a risk that a mark is formed on the paper.
It is demanded that the surface properties be suppressed to a certain level, and that the surface properties be further improved. For this purpose, while setting the difference in the gap between the rolls in the width direction within a few μm, a heat setting is performed by applying a pressing pressure of at least 15 kg / cm uniformly over the entire width, and the difference in the thickness of the woven fabric is reduced. At 10μ
Within, and eliminate the difference in height of the yarns protruding on the surface forming the fabric, and further increase the surface contact area of the protruding yarns by flattening them to improve the surface properties. You have to. However, it was impossible with the current roll making technology due to the problems of flatness and deflection.

[0004] Further, the total press pressure of the entire width becomes a considerably large pressure, so that the apparatus becomes large. Also, a hot roll press is newly added to a heat set apparatus in which a hot roll press apparatus is not installed. There was also a problem that the frame had to be modified to withstand the press pressure when the apparatus was installed. Also,
The hot roll becomes very expensive when the surface length is long, and thus has a large problem in cost.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides an endless belt having a wide width and a small thickness by using a hot roll having a roll surface shorter than the width of a press cradle. The present invention provides a hot roll press device for smoothing the surface of an endless belt by applying heat and pressure uniformly and at low cost, and a heat setting method using the hot roll press device.

[0006]

Means for Solving the Problems The present invention provides: "1. A hot roll press for smoothing a belt surface by applying heat and pressure between a hot roll provided with a running endless belt opposed thereto and a press cradle to apply heat and pressure. In the apparatus, a hot roll press in which the surface length of the roll is shorter than the width of the press receiving stand, the axis of the roll is parallel to the running surface of the endless belt, and is inclined at an angle of 90 ° or less with respect to the running direction of the endless belt. 1. A hot roll press device for smoothing the surface of the endless belt, which is arranged so as to be movable in the width direction of the endless belt 2. A stretching support roll for stretching and running the endless belt 2. A hot roll press device for smoothing the surface of the endless belt described in 3. The hot roll having a tapered roll shoulder. 3. A hot roll press device for smoothing the surface of the endless belt according to item 1 or 2. 4. The hot roll is rolled in a belt running direction provided on a movable table that moves the roll in the width direction of the belt. 4. The surface of the endless belt according to any one of Items 1 to 3, which is rotatably supported by a vertically movable support by a hydraulic cylinder disposed on a roll rotating table that inclines the axis of the endless belt. 5. A hot roll press device for smoothing the surface of the endless belt described in any one of items 1 to 4, wherein the moving table is mounted on a moving device that moves the entire press device. 5. The roll press device 6. The end according to any one of items 1 to 5, wherein the press cradle is a roll arranged opposite to the hot roll. 6. A hot roll press device for smoothing the surface of a belt 7. The endless belt according to any one of the above items 1 to 6, wherein the press receiving base is a plate-shaped body arranged to face the hot roll. A hot roll press device that smoothes the surface of the endless roll 8. A row in which the axis of the endless belt applied to the tension support roll is inclined with respect to the running direction of the endless belt.
The hot roll is moved in the width direction of the endless belt and heated and pressed while spirally contacting the surface of the endless belt. A method of heat setting the surface of the endless belt smoothly. "
About.

[0007]

The first feature of the present invention is that the endless belt is simultaneously heated and pressed by the hot roll press device. Since the endless belt is completely heat-set with the surface pressed smoothly, the smooth state can be maintained even after the pressure is applied.

The second feature is that the surface length of the hot roll is short. Since the surface length of the hot roll is short, the hot roll does not bend, and the accuracy of the flatness of the roll surface can be increased. In addition, since it is hard to be affected by the deflection of the press receiver and the accuracy of the flatness, a small gap can be maintained between the hot roll and the press receiver. Further, since the total press pressure can be reduced, the deflection of the roll is further reduced, the apparatus is reduced in size, and the apparatus can be manufactured at low cost. Press cradle,
It may have a function of receiving pressure from a hot roll via an endless belt to be processed, and may be a rotating roll or a plate-like body.

A third feature is that the hot roll heats and pressurizes while moving in the width direction of the endless belt as the endless belt runs. Thereby, even if it is an endless belt having a width wider than the surface length of the hot roll, it is possible to uniformly heat and press the whole spirally,
It can accommodate endless belts of any width.

[0010] The hot roll is a roll having a shorter surface length than the width of the cradle. This roll is arranged so that its axis is parallel to the running surface of the endless belt and is inclined at an angle of 90 ° or less with respect to the running direction of the endless belt, and can slide in the width direction of the endless belt. It is installed in. Therefore, when the hot roll is moved in the width direction of the belt while being pressed and heated by the hot roll while rotating the endless belt, the belt is sequentially hot-pressed in a spiral manner. Processing can be repeated as many times as necessary. Since a short hot roll is used, it is easy to move in the width direction of the belt. By these features, the thickness of the woven fabric is made uniform throughout the woven fabric, and the height difference of the protruding yarn on the surface forming the woven fabric is eliminated, and the surface contact area of the protruding yarn is pressed. By flattening, it is possible to increase the size and improve the surface properties. Next, specific examples will be described with reference to the drawings.

[0011]

1 and 2 show a hot roll press apparatus according to an embodiment of the present invention. 2 is a hot roll, 3
Is a hot roll support, 4 is a hydraulic cylinder, 5 is a rotary table, 6 is a moving table, 7 is a moving rail, and 8 is a hot roll press device moving device. The hot roll 2 is rotatably supported by a hot roll support 3. In the present embodiment, a roll having a surface length of 300 mm and a diameter of 120 mm and capable of generating heat at 70 ° C. or more of an induction heating type was used. The press effective surface length is 220 mm because 40 mm at both ends of the roll are tapered. The hot roll support 3 is upwardly moved by two hydraulic cylinders 5K.
It has a structure that can be pressurized to g / cm or more. The hydraulic cylinder 4 was installed on the turntable 5 with an interval substantially equal to the surface length of the hot roll 2. The turntable 5 is rotatably mounted on a movable table 6. By rotating the turntable 5, the axis of the hot roll is shifted from the running direction of the endless belt. The turntable 6 is movably installed on the moving rail 7, and the hot roll 2 moves when the move table 6 moves. With this structure, the endless belt can move in the width direction. The hot roll press device moving device 8 is installed at the bottom of the moving rail 7, and the hot roll press device 1 itself is movable. In this embodiment, a table provided with casters was used. The hot roll press device 1 itself can be moved, so it can be set and used when needed and stored when not in use, and one hot roll press device can handle multiple heat setting devices. It is also possible to do. When actually performing heat setting, the moving rail 7 is set in parallel with the width direction of the endless belt 10 so as to sandwich the endless belt 10 between the endless belt 10 and the press receiver.

FIGS. 3 to 5 show a heat setting method using a hot roll press apparatus according to one embodiment of the present invention. In the drawing, only the hot roll 2 of the hot press roll device 1 is shown for convenience. In the present embodiment, the hot roll press apparatus of the present invention was set to a normal heat setting measure for stabilizing the posture and the structure by heating the endless belt while applying tension.

FIG. 3 is a view of the endless belt viewed from the width direction. 2 is a hot roll and a drive roll 9
The endless belt 10 is pressurized and heated for processing. 9 and 9 'are rolls of a normal heat setting device, 9 is a drive roll for driving the endless belt by rotating and driving, and 9' is a rotatable endless belt which applies a tension to the left and right movable in the drawing. It is a tension roll. In the present embodiment, the drive roll 9 also functions as a press cradle. Dimensions of drive roll and tension roll are 2,000 mm in surface length and 300 in diameter.
mm.

In this embodiment, each roll is arranged in such a manner.
Although the dimensions are set, the dimensions are not limited to this, and the hot roll 2 may be disposed above the drive roll 4 and pressed downward, or may be in the horizontal direction. Also, it is needless to say that the dimension is not limited to this, and it is needless to say that the surface length of the hot roll 2 is 1,000 mm or less because there is no deflection in the roll surface length direction and the flatness accuracy is improved. It is preferable because it is good. In addition, the method of applying pressure and the method of heating the hot roll 2 are not limited thereto, and there is no particular problem as long as they can be performed appropriately. Moreover, you may use simultaneously with the normal heat setting using the heater apparatus 11 and the tenter apparatus 12 installed in the normal heat set apparatus.

FIG. 4 is a view of the apparatus of FIG. 3 viewed from below. It can be understood from the drawing that the axis of the hot roll 2 is displaced by an angle φ with respect to the width direction of the endless belt 10. Since the running direction of the endless belt and the axis of the hot roll are shifted by an angle φ, the force applied to the hot roll 2 in the running direction generated along with the running of the endless belt 10 rotates the hot roll 2 and the direction of the endless belt 10. The hot roll 2 moves while rotating on the moving rail 7 because the force is transmitted by being divided into the force for moving in the width direction. The movement of the hot roll according to the present embodiment is preferable because it is simple and can be performed at low cost. However, the present invention is not limited to this, and the hot roll 2 may be mechanically moved using another moving device. You can also.

[0016] Note that state, and are up to 90 degrees greater the deviation angle phi, preferably not more than 10 degrees. If the angle is too large, the moving width of the hot roll 2 is
It becomes larger than the width , and it becomes difficult to heat and pressurize the entire endless belt 10. There is also a problem that the endless belt 10 and the hot roll 2 come into point contact. It is preferable that the deviation angle is determined so that the hot roll 2 moves the same distance as the surface length of the hot roll 2 or a short distance while the endless belt 10 makes one round. When the angle is determined so that the endless belt 10 moves the same distance as the surface length of the hot roll 2 during one rotation, the hot roll 2 is spirally formed on the endless belt 10 as shown by a dotted line in FIG. Is in contact with the endless belt 10, and the entire endless belt 10 can be uniformly heated and pressed. If the shift angle is determined so as to move a short distance, a portion where hot roll running overlaps appears, so that multiple heating and pressing can be performed. For example, if the endless belt 10 is moved by a half distance, the entire endless belt 10 can be heated and pressed twice and uniformly.

In this embodiment, only one hot roll 2 is used. However, if a plurality of hot rolls 2 are arranged in the width direction of the endless belt 10, that is, on the moving rail 7, heat setting can be performed in a short time. There are advantages.

FIG. 5 is a view of the endless belt 10 viewed from the running direction. The roll shoulder of the hot roll 2 is tapered so that the diameter decreases toward the end, and since the corner of the roll shoulder of the hot roll 2 does not contact the endless belt 10, a press mark may be formed. It is well understood that there is no such thing. This makes it possible to uniformly heat and press the entire endless belt 10 spirally.

FIG. 6 shows a heat setting method using a hot roll press apparatus according to another embodiment. Also in this example, a hot roll press device was set in a normal heat setting device, and the test was performed. FIG. 6 shows an endless belt 10.
It is the side view seen from the width direction. Reference numeral 1 denotes a hot roll press device. The hot roll press device shown in FIG. 2 described above uses a cantileverable roll 13 having a surface length substantially equal to that of the moving rail 7 as a press receiving stand and a position where the hot roll 2 faces. It is arranged in. In this embodiment, the roll 13 is also a hot roll that can be heated. The heat setting is performed by disposing the hot roll press device 1 between the drive roll 9 and the tension roll 9 '. In this embodiment, the roll 1
Since the endless belt 3 can also be heated, the endless belt 10 can be heated from the front and back together with the hot roll 2, so that heat is easily transmitted to the inside of the endless belt 10 and the setability is improved. Further, by combining a plurality of the present embodiments or combining with the previous embodiment, a plurality of hot roll press devices can be arranged in the running direction of the endless belt 10 to perform heat setting.

As shown in FIG. 4, the end portions in the width direction of the endless belt 10 formed into a spiral shape are processed by setting the axis of the hot roll parallel to the running direction of the belt and setting the deviation angle φ to 0. Processed. In addition, after heat-setting with a wide width, it may be cut to a predetermined size.

FIG. 7 shows a conventional example, in which heating and pressurizing are performed between a roll 9 of a heat setting device, which is a press receiver, and a hot roll 2 having substantially the same surface length. Although it is possible to heat and pressurize the entire width of 10 rolls, it is very difficult to maintain a small gap between the rolls with the full width of the rolls, as described above, because of the flatness and deflection of the rolls. There was.

FIG. 8 is a graph showing the thickness in the width direction after the heat-setting of the endless belt of the papermaking fabric by the method shown in FIGS. 3 to 5. The papermaking fabric used in this example was already subjected to normal heat setting.
It is 000 mm wide and 0.70 mm thick. The heat setting conditions were as follows: a pressing pressure of 19 kg / cm, a deviation angle of 0.5 °, and a roll heating temperature of 190 ° C. The moving distance of the hot roll is 110 mm, and hot pressing is performed twice. The results show that the difference in thickness in the width direction is less than 10 μm, there is no pressing mark on the shoulder of the hot roll, and the effect of hot pressing is an average thickness of 0.6.
It is understood that, by being thinner than about 8 mm and 0.70 mm before the heat setting, the entire surface was uniformly hot-pressed and the surface was smooth, and good results were obtained. You.

FIG. 9 is a graph showing the thickness in the width direction after the endless belt of the papermaking fabric is heat-set by the conventional method shown in FIG. The hot roll has a surface length of 1,
The papermaking fabric used was 500 mm in diameter and 240 mm in diameter, and had a width of 1,000 mm and a thickness of 0.70 mm which had been subjected to the same ordinary heat setting as in the previous example. Similarly, the heat setting conditions were a press pressure of 19 kg /
cm and the roll heating temperature is 190 ° C. Further, in order to match the conditions, the endless belt was rotated twice and hot-pressed twice. As a matter of course, the deviation angle is 0 degree, and the moving amount of the hot roll is also 0 mm. The results show that the difference in thickness in the width direction is more than 20μ, and the effect of hot pressing is also effective in the part where the thickness is about 0.68mm, but the part where the thickness is about 0.70mm which is the same as before heat setting. Means that there is no effect at all, and it is understood that the entire surface is not hot-pressed uniformly and there is a serious problem in practical use.

[0024]

As described above, the present invention has a wide width,
Even if it is an endless belt having a small thickness, it has an excellent effect that the entire surface can be uniformly heat-set at a low cost and smoothly.

[Brief description of the drawings]

FIG. 1 is a diagram showing a hot roll press apparatus according to an embodiment of the present invention as viewed from a roll surface length direction.

FIG. 2 is a diagram showing a hot roll press apparatus according to an embodiment of the present invention, as viewed from a roll rotation direction.

FIG. 3 is a view showing a heat setting method using a hot roll press device according to an embodiment of the present invention, as viewed from a width direction of an endless belt.

FIG. 4 is a side view seen from below showing a heat setting method using the hot roll press device according to the embodiment of the present invention.

FIG. 5 is a side view of the heat setting method using the hot roll press device according to the embodiment of the present invention, viewed from the running direction of the endless belt.

FIG. 6 is a side view seen from the width direction of an endless belt, showing a heat setting method using a hot roll press device according to another embodiment of the present invention.

FIG. 7 is a side view showing a heat setting method using a hot roll as a conventional example, viewed from a running direction of an endless belt.

FIG. 8 is a graph showing a thickness in a width direction of an endless belt actually heat-set by a heat-setting method using a hot roll press device according to an embodiment of the present invention.

FIG. 9 is a graph showing the thickness in the width direction of an endless belt actually heat-set by a heat-setting method using a hot roll of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hot roll press apparatus 2 Hot roll 3 Hot roll support tool 4 Hydraulic cylinder 5 Rotating stand 6 Moving stand 7 Moving rail 8 Hot roll press moving apparatus 9 Roll of heat setting apparatus 9 'Roll of heat setting apparatus 10 Endless belt 11 Heater device 12 Tenter device 13 Roll

──────────────────────────────────────────────────の Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) D06C 15/00-15/06 D06C 7/00-7/02 D21F 1/10 D21F 7/08 D03D 1 / 00

Claims (8)

(57) [Claims] 1. Heating is performed by passing between a hot roll provided with a running endless belt opposed thereto and a press cradle.
In a hot roll press device which pressurizes and smoothes the surface of a belt, a hot roll press in which the surface length of a roll is shorter than the width of a press cradle, the axis of the roll is parallel to the running surface of the endless belt, and the running of the endless belt A hot roll press device for smoothing the surface of the endless belt, which is arranged at an angle of 90 ° or less with respect to the direction so as to be movable in the width direction of the endless belt. 2. The hot roll press apparatus according to claim 1, wherein a stretch supporting roll for stretching and running the endless belt is arranged. 3. The hot roll press apparatus according to claim 1, wherein the roll shoulder is a hot roll having a tapered shape. 4. A hot roll can be moved up and down by a hydraulic cylinder disposed on a roll turntable that inclines the axis of the roll with respect to a belt running direction provided on a moving table that moves the roll in the width direction of the belt. 4. The device according to claim 1, wherein the supporting member is rotatably supported by a support member.
A hot roll press device for smoothing the surface of the endless belt described in the paragraph. 5. The hot roll press device according to claim 1, wherein the moving table is mounted on a moving device that moves the entire press device. 6. The press cradle according to claim 1, wherein the press cradle is a roll arranged opposite to the hot roll.
A hot roll press device for smoothing the surface of the endless belt described in the paragraph. 7. The hot roll press according to claim 1, wherein the press pedestal is a plate-shaped body arranged to face the hot roll. apparatus. 8. A hot roll, wherein an axis of an endless belt applied to a tension support roll is inclined with respect to a running direction of the endless belt, and a surface of the roll is shorter than a cradle of a press and runs between a hot roll and a cradle. A method for smooth heat-setting the surface of an endless belt, wherein the roller is moved in the width direction of the endless belt and heated and pressed while being in spiral contact with the surface of the endless belt.