KR20210003577A - Apparatus for adjusting gap between rolls of roll mill and roll mill having the same - Google Patents

Abstract

An apparatus for adjusting a gap between rolls according to the present invention comprises: a fixed roll installed rotatable about a rotation shaft having a fixed position with respect to the outside; a movable roll disposed to be displaced with respect to the fixed roll; and a driving unit for displacing the movable roll, wherein the rotating shaft of the fixed roll and the rotating shaft of the movable roll are located on the same horizontal plane in a state before the interval adjustment, and the driving unit can displace the rotating shaft of the movable roll in the vertical direction. The present invention can reduce manufacturing costs.

Description

Roll spacing device and roll mill including the same {APPARATUS FOR ADJUSTING GAP BETWEEN ROLLS OF ROLL MILL AND ROLL MILL HAVING THE SAME}

The present invention relates to a roll mill as a pulverizing and dispersing device, and to a device for adjusting a gap between rolls and a roll mill including the same.

A roll mill or a roller mill is used to mix, crush, or disperse pasty materials. The roll mill includes a plurality of rolls arranged one after another on the same plane.When the paste is injected while changing the rotation direction and number of rotations of each roll, the paste attached to the roll surface passes between a pair of neighboring rolls, while pressure and It can be pulverized and dispersed by shear force.

1 is an example of a roll mill according to the prior art, and shows a roll mill disclosed in Patent No. 10-1112004. This roll mill contains three rolls, so it is a type commonly referred to as'three roll mill','three roll mill' or'three roller mill'. The three rolls are arranged horizontally on the same plane, and the middle roll (1) in the middle is arranged so that it can only be rotated in place, but the front roll (2) and the rear roll (2) are placed before and after the middle roll (1). Each of the rolls 3 can be displaced in the horizontal direction, so that the distance with the roll 1 of each can be adjusted.

However, the direction in which the front roll (2) and the rear roll (3) are displaced is within the horizontal plane, which is the common plane of the rotation axis of the three rolls, so the distance the previous roll (2) or the rear roll (3) moves is unchanged. It is reflected in the gap between. This means that, for example, when you want to adjust the distance between the rolls by 1 μm, you must displace the front roll 2 or the rear roll 3 exactly 1 μm, and special measures are required to enable such precise displacement. . Therefore, there is a problem that a lot of cost is required to manufacture and maintain the three-roll mill. Furthermore, for such precise displacement adjustment, for example, three rolls are composed of a module installed in one frame, and the entire module may need to be replaced even if only one of the three rolls is damaged.

The present invention was conceived to solve the above problems, and an object of the present invention is to provide a roll gap adjusting device capable of easily adjusting the gap between rolls and a roll mill including the same.

Another object of the present invention is to provide a roll spacer and a roll mill including the same, which are inexpensive to manufacture and maintain.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments associated with the accompanying drawings.

The technical problem to be achieved by the present invention is not limited to the technical problems mentioned above, and other technical problems that are not mentioned can be clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description. There will be.

In order to achieve the above object, the roll gap adjusting device according to the present invention includes a fixed roll rotatably installed about a rotation shaft whose position is fixed to the outside, and a movable roll disposed to be displaced with respect to the fixed roll. And, a driving unit for displacing the movable roll, wherein the rotation axis of the fixed roll and the rotation axis of the movable roll are located on the same horizontal plane in a state before the interval adjustment, and the driving unit moves the rotation axis of the movable roll in the vertical direction. Can be displaced.

In the roll spacing control apparatus according to the present invention, the driving unit moves in an up-down direction together with the rotation axis of the movable roll, the first inclined block having a lower surface as an inclined surface, and the upper surface with the inclined surface of the first inclined block. The engaging inclined surface may include a second inclined block displaced in the horizontal direction. In addition, the driving unit may further include a ball screw displacing the second inclined block in a horizontal direction. Furthermore, the driving unit may further include a linear motion guide supporting vertical movement of the rotation shaft of the movable roll.

According to the present invention, a roll mill including the above-described roll gap adjusting device may be provided.

According to the present invention, it is possible to adjust the distance between the two rolls by relatively raising and lowering one of the two horizontally arranged rolls, and it is possible to reduce the need for precision parts or precision processing required at this time, thus reducing the manufacturing cost. You can save.

In addition, since each roll can be easily separated from each other, it is easy to replace only the damaged roll, and thus maintenance cost can be reduced.

The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be deduced from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a perspective view of an example of a roll mill according to the prior art.
2 is a perspective view of an embodiment of a roll mill according to the present invention.
3 is a right perspective view of the case of the embodiment of FIG. 2 removed.
Figure 4 is a left perspective view of the case in the embodiment of Figure 2 removed.
5 is a schematic cross-sectional view of three rolls in the embodiment of FIG. 2;
6 is a schematic diagram of a pair of adjacent rolls in the embodiment of FIG. 2, and is a cross-sectional view showing a state before the interval adjustment.
FIG. 7 is a schematic cross-sectional view of a pair of adjacent rolls corresponding to FIG. 6 when the spacing is adjusted.
Fig. 8 is an explanatory diagram for geometrically explaining a change in a gap between a pair of adjacent rolls before and after gap adjustment.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be implemented in various different forms, and therefore is not limited to the exemplary embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when a part is said to be "connected (connected, contacted, bonded)" with another part, it is not only "directly connected", but also "indirectly connected" with another member in the middle. "Including the case. In addition, when a part "includes" a certain component, it means that other components may be further provided, rather than excluding other components unless specifically stated to the contrary.

The terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or a combination thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance.

Figure 2 is a perspective view of an embodiment of the roll mill according to the present invention, Figure 3 is a right perspective view of the case of the embodiment of Figure 2 removed, Figure 4 is a left perspective view of the case removed in the embodiment of Figure 2 to be.

The roll mill according to the present invention, as shown, three rolls (51, 52, 53), that is, the first roll 51 in the middle, the second roll 52 disposed on the front side of the first roll 51 ) And a third roll 53 disposed on the rear side of the first roll 51. The three rolls 51, 52, 53 may be disposed such that each of the rotation center axes is positioned on the same horizontal plane.

The first roll 51 is arranged to be rotated around a horizontally arranged first rotation shaft 51a, and the first rotation shaft 51a is not displaced in relation to the outside and is held in place. Therefore, the first roll 51 may be referred to as a fixed roll. Here, the'outside' may be the frame 30 of the roll mill. For example, the first roll 51 may be fixed with respect to the frame 30 through the support 31 supporting the first rotation shaft 51a, and may rotate around the first rotation shaft 51a.

The second roll 52 has its rotation shaft, that is, the second rotation shaft 52a, is disposed in parallel with the first rotation shaft 51a, and is roughly with the first rotation shaft 51a in an initial state, that is, a state in which the gap adjustment is not applied. It can be located within the same horizontal plane. The second roll 52 may be displaced with respect to the first roll 51 so that the distance with the first roll 51 may be adjusted. Therefore, the second roll 52 can be referred to as a movable roll. A driving unit may be provided to displace the second roll 52.

The third roll 53 is located on the opposite side of the second roll 52 with the first roll 51 as its center, and the third rotation shaft 53a, which is its rotation axis, is also in the same horizontal plane as the first rotation shaft 51a in the initial state. Can be located. The third roll 53 may also be displaced relative to the first roll 51. Since the third roll 53 can be substantially displaced through the same configuration as the second roll 52, a description of the displacement of the second roll 52 and the driving part therefor will be described below in the third roll 53. The same can be applied.

As shown in Fig. 5, when viewed in a cross section across these three rolls 51, 52, 53, the second roll 52 on the left and the third on the right with the first roll 51 in the center. The roll 53 may be positioned, wherein the first roll 51 rotates in a clockwise direction, the second roll 52 and the third roll 53 rotate in a counterclockwise direction, respectively, and the three rolls 51 and 52 , 53) with different rotational speeds, and inserting a paste that needs pulverization and dispersion between the first roll 51 and the third roll 53 in the direction of the arrow A, the paste becomes the first roll ( 51) is adhered to the roll surface of the third roll 53 and rotates together. In particular, it is pulverized and dispersed by pressure and shear force while passing through the gap between the first roll 51 and the third roll 53. Some of them proceed in the direction of arrow B while passing through the gap between the first roll 51 and the second roll 52 again, and are crushed and dispersed again at this gap. Meanwhile, the paste adhered to the roll surface of the third roll 53 re-enters into the gap between the first roll 51 and the third roll 53, and the paste may be sufficiently pulverized and dispersed as such operations are repeated. . Thereafter, when the scraper 60 is brought into contact with the roll surface of the second roll 52, the paste adhered to the roll surface of the second roll 52 may be scraped off by the scraper 60 and carried out.

In order to explain the operation method of the driving unit provided to adjust the spacing between the rolls 51, 52, 53, it will be described with reference to FIG. 6 enlarged by the dotted line of FIG. 5.

6 is for showing the interval between the first roll 51 and the second roll 52 before the initial state, that is, before the interval adjustment is performed, and is shown in an exaggerated size compared to the actual size for the purpose of explanation. , Between the radius of the first roll 51 (R ₁ ), the radius of the second roll 52 (R ₂ ), and the shortest distance e ₁ between the first roll 51 and the second roll 52 Ratios may differ from those shown. Also, unlike shown, the first roll 51 and the second roll 52 may be in contact with each other. Accordingly, the shortest distance e ₁ between the first roll 51 and the second roll 52 in FIG. 6 may be actually zero. In FIG. 6, the x-axis direction is approximately horizontal, and the y-axis is approximately vertical. As described above, one of the two rolls is moved in the x-axis direction in order to adjust the gap between the rolls in the roll mill according to the prior art.

According to the present invention, in order to adjust the distance between the first roll 51 and the second roll 52, the driving unit displaces the second roll 52 in the vertical direction, that is, in the y-axis direction. Here, the y-axis direction does not necessarily have to be vertical to the horizontal direction in a strict sense, and it is sufficient if it is a vertical direction crossing the horizontal direction. For example, when the driving unit lowers the second roll 52, the second roll 52 is at a relatively lower position than the first roll 51 as illustrated in FIG. 7. At this time, the first roll 51 and The shortest distance e ₂ between the second rolls 52 is increased compared to the shortest distance e ₁ in the state shown in FIG. 5.

If the change between the state of FIG. 6 and the state of FIG. 7 is geometrically expressed, it becomes FIG. Here, C ₁ is the position of the first rotation shaft 51a of the first roll 51, C ₂ is the position of the second rotation shaft 52a of the second roll 52 in the state of FIG. 6, and C ₂ ′ is FIG. 7 In the state of, each corresponds to the position of the second rotation shaft 52a of the second roll 52, R ₁ corresponds to the radius of the first roll 51, R ₂ corresponds to the radius of the second roll 52, respectively. .

In the initial state, the distance between the first rotation shaft 51a and the second rotation shaft 52a may be expressed as R ₁ +R ₂ +e ₁ . In this state, when the driving unit vertically lowers the second roll 52, that is, the second rotation shaft 52a by the distance d, the distance between the first rotation shaft 51a and the second rotation shaft 52a is R ₁ + R ₂ + is changed to e ₂ . Then, the difference between the first roll 51 and the second roll 52 before and after descending, that is, e ₂ -e ₁ is significantly smaller than the descending distance d of the second roll 52. You can intuitively know through it. As such, since the gap change amount (e ₂ -e ₁ ) between the rolls is significantly smaller than the vertical displacement (d) of the second roll 52, a precision component for the driving part for the displacement of the second roll 52 or The need for precision machining can be reduced that much.

Therefore, in short, after setting the first roll 51 and the second roll 52 to contact each other in actual use (ie, e ₁ = 0), the first roll 51 is raised and lowered by the second roll 52 ) And the second roll 52, as well as the distance between the first roll 51 and the third roll 53 in the same manner as necessary.

In order to enable the displacement of the second roll 52 (and the third roll 53), the driving unit may include inclined blocks 120 and 210. The first inclined block 120 may be connected to the second rotation shaft 52a to move up and down together, and in particular, at least a portion of its lower surface may be formed as an inclined surface. The second inclined block 210 may be disposed such that at least a portion of the upper surface thereof is an inclined surface, and the inclined surface contacts the inclined surface of the first inclined block 120. In this state, when the second inclined block 210 is displaced in the horizontal direction, the second rotating shaft 52a can be lifted up and down through the first inclined block 120. In order to displace the second inclined block 210 in the horizontal direction, a ball screw mechanism 220 engaged with the second inclined block 210 may be added. The rotation handle 230 shown in FIGS. 2 and 3 is illustrated as for rotating the screw of the ball screw mechanism. When a power source such as an electric motor is connected in place of the rotating handle 230, the displacement of the second inclined block 210 may be motorized. Furthermore, a sensor for measuring the gap between the rolls is added, and it is also possible to build an automatic control system that adjusts the gap between the rolls by power from an electric motor according to information from this sensor. As shown in the right perspective view of FIG. 2 and the left perspective view of FIG. 3, respectively, in order to raise and lower both ends of the second rotation shaft 52a, a pair of the first inclined block 120 and the second inclined block 210 It can be connected to a single ball screw mechanism 220. Since the configuration of the driving unit as described above is exemplary for elevating the second roll 52, it may be replaced with another known configuration.

Meanwhile, in order to precisely guide the vertical displacement of the second rotation shaft 52a, a support plate 110 for rotating and supporting the second rotation shaft 52a is provided, and the support plate 110 is raised and lowered with respect to the frame 30. The linear motion guide 130 may be disposed between the support plate 110 and the frame 30 to be able to do so. The support plate 110 and the linear motion guide 130 may also be installed at both ends of the second roll 52, respectively. A spring not shown is disposed between the frame 30 and the upper end of the support plate 110 so that the support plate 110 and thus the first inclined block 120 are pressed downward to maintain contact with the second inclined block 210 Can be.

In this configuration, since the second roll 52 has an independent support structure that can be mechanically separated from the first roll 51, for example, the second roll 52 is removed from the frame 30 by disassembling the linear motion guide 130. The roll 52 can be easily removed. As mentioned above, the same can be applied to the third roll 53, and as a result, it is easy to separate the first roll 51, the second roll 52, and the third roll 53 separately. Therefore, if any one of the three rolls 51, 52, 53 is damaged and needs replacement, it is possible to separate and replace only the damaged roll.

In the above, a three-roll mill has been described as an example, but it is obvious that the present invention can be applied equally to a mill provided with only two rolls or a mill provided with four or more rolls.

Embodiments of the present invention described above and illustrated in the drawings should not be construed as limiting the technical idea of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those of ordinary skill in the technical field of the present invention can improve and change the technical idea of the present invention in various forms. Therefore, such improvements and changes will fall within the scope of the present invention as long as it is apparent to those of ordinary skill in the art.

Claims (5)

A fixed roll that is fixed to the outside and is rotatably installed around a horizontally arranged rotary shaft,
A movable roll installed rotatably about a rotation axis parallel to the rotation axis of the fixed roll and disposed to be displaced with respect to the fixed roll;
Roll spacing adjustment device comprising a driving unit for displacing the rotation axis of the movable roll in the vertical direction. The method of claim 1, wherein the driving unit,
A first inclined block connected to the rotating shaft of the movable roll and moving in a vertical direction together with the rotating shaft of the movable roll, with at least a portion of the lower surface being an inclined surface,
At least a portion of the upper surface becomes an inclined surface meshing with the inclined surface of the first inclined block, and a second inclined block displaced in a horizontal direction. The method of claim 2, wherein the driving unit,
Roll spacing adjustment device further comprising a ball screw for displacing the second inclined block in the horizontal direction. The method of claim 2, wherein the driving unit,
Roll spacing adjustment device further comprising a linear motion guide for supporting the vertical movement of the rotation shaft of the movable roll. A roll mill comprising a roll spacing adjustment device according to any one of claims 1 to 4.

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