Open roll machine

Abstract

To provide an open roll machine that can reduce the workload associated with cutting out kneaded material from a roll by an operator.SOLUTION: An open roll machine 1 has a cutting device 3 that mixes or rolls a kneaded material M by rotating a pair of rolls 2A, 2B and cuts a tape-like body from the sheet-like kneaded material Ms wound around the roll 2A. The cutting device 3 includes a cutting blade 5b that makes circumferential cuts in the sheet-like kneaded material Ms wound around the roll 2A, and stripping means 8 that strips the cut kneaded material Ms from the roll 2A. The stripping means 8 has a stripping wheel 9a arranged parallel to the roll 2A, pressed against the cut kneaded material Ms, and configured to rotate in the same direction as the roll 2A.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an open roll mill for kneading or rolling materials such as rubber, plastics, and ceramics. [Background technology]

[0002] Conventionally, an open roll mill has been known as a device for kneading or rolling various materials. In this open roll mill, two horizontal rolls are arranged parallel to each other with a gap between them, and the material to be kneaded is fed from above toward the gap, and then the two rolls rotate to knead and roll the material. In the open roll mill, the material to be kneaded is wound around the front roll (referred to as the front roll) of the two rolls to perform the kneading and rolling operations. The wound material to be kneaded is rolled to a constant thickness as it passes through the gap due to the rotation of the rolls (see, for example, Patent Document 1).

[0003] During rolling, the mixed material is subjected to compressive, tensile, and shear forces, and as it deforms, the material is crushed, distributed, dispersed, and homogenized. At the same time, internal stress is generated, which causes the entanglement of polymer chains in the mixed material to loosen and the molecular weight to change, resulting in a kneading action. As the mixed material rotates around the front roll, it is sent to a reservoir (also called a bank) above the mixed material. In the bank, all or part of the rolled mixed material is replaced with the remaining mixed material, facilitating the homogenization and mixing of the mixed material. To promote the replacement of the mixed material, workers may intervene, or a device called a stock blender may be used.

[0004] When the kneading process is completed, a homogenized sheet-like kneaded material of a uniform thickness is wound around the front roll.

[0005] Conventionally, cutting out the sheet-like kneaded material wound around the front roll has been mainly done by hand. Specifically, multiple cutting knives or the like are pressed against the sheet-like kneaded material to make cuts in the circumferential direction of the front roll, and then another blade is used to cut between the two cuts in the generatrix direction of the front roll, and the leading end of the cut tape-like kneaded material is picked up by hand to cut out the tape-like body. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-120664 Summary of the Invention [Problem to be solved by the invention]

[0007] However, the work of cutting out the sheet-like mixed material wound around the front roll is complicated and places a burden on the worker.

[0008] The present invention has been made in view of the above circumstances, and has an object to provide an open roll machine that can reduce the workload of an operator when cutting out a material to be kneaded from a roll. [Means for solving the problem]

[0009] The open roll mill of the present invention is an open roll mill that kneads or rolls a material to be kneaded by rotating a pair of rolls and has a cutting device that cuts out a tape-shaped body from a sheet-like material wound around one of the rolls, the cutting device having a cutting blade that makes a circumferential cut in the sheet-like material wound around the one roll and a peeling means that peels off the kneaded material having the cut in it from the one roll, the peeling means having a peeling wheel that is arranged parallel to the one roll and is pressed against the kneaded material having the cut in it and is configured to rotate in the same direction as the one roll. Note that in the present invention, kneading or rolling is a concept that encompasses aspects in which either kneading or rolling or both are performed.

[0010] In a first form, the peeling means has a friction roll arranged coaxially with the peeling wheel, and a transmission means for reversing the rotation direction of the friction roll and transmitting it to the peeling wheel, and is characterized in that the friction roll is pressed against the kneaded material with the notches and rotates in the opposite direction to the one of the rolls, and the rotational force is transmitted to the peeling wheel via the transmission means, causing the peeling wheel to rotate in the same direction as the one of the rolls.

[0011] In a second embodiment, the peeling means has a one-way clutch, and the rotation direction of the peeling wheel is restricted by the one-way clutch, so that the peeling wheel rotates only in the same direction as the one roll.

[0012] The cutting device has, as a cutting mechanism, the cutting blade, a touch roll that is pressed against the wound mixed material, and a pair of connecting members that connect the sliding axis of the cutting blade and the rotating axis of the touch roll, which are parallel to each other, on both axial sides, and is characterized in that the cutting blade is configured to be swingable by the pair of connecting members being rotatably supported.

[0013] The cutting mechanism is characterized in that it is arranged to be positioned at a standby position where it does not interfere with other members during kneading or rolling, and is arranged to be positioned from the standby position to a position facing the outer circumferential surface of one of the rolls during cutting. Specifically, the cutting mechanism is connected to the end of a rotatable arm, and during cutting, the arm is rotated to be positioned at a standby position above the one of the rolls where it does not face the outer circumferential surface of the one of the rolls.

[0014] The distance between the outer peripheral surface of the scraping wheel and the outer peripheral surface of the touch roll is greater than the thickness of the sheet-like kneading material. [Effects of the Invention]

[0015] In the open roll mill of the present invention, the cutting device that cuts out a tape-shaped body from a sheet-like mixed material wound around one of the rolls includes a cutting blade that makes a circumferential cut in the mixed material wound around one of the rolls, and a peeling means that peels off the mixed material with the cut from the one roll, and the peeling means has a peeling wheel that is arranged parallel to the one roll and is pressed against the mixed material with the cut and configured to rotate in the same direction as the one roll, so that the formation of the cut and the peeling in the cutting operation can be performed automatically, reducing the burden on the worker of cutting the mixed material from the roll. In this way, cutting, which previously required manual work in mixing using an open roll mill, can be automated.

[0016] The peeling means has a friction roll pressed against the kneaded material with the notches and rotating in the opposite direction to one of the rolls, and the rotational force is transmitted to the peeling wheel via a transmission means, causing the peeling wheel to rotate in the same direction as the other of the rolls, so that no separate driving means is required to rotate the peeling wheel and the peeling means can be made compact.

[0017] The cutting device has a cutting mechanism that includes a cutting blade, a touch roll, and a pair of connecting members that connect the parallel sliding axis of the cutting blade and the rotation axis of the touch roll on both axial sides, and the pair of connecting members are rotatably supported, so that the cutting blade is configured to be able to swing.This makes it easier for the cutting blade to cooperate with the touch roll to press into the sheet-like kneaded material, and allows for stable formation of incisions. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective schematic view of an embodiment of an open roll mill of the present invention. [Figure 2] FIG. 2 is an enlarged view of a cutting mechanism in the open roll mill of FIG. [Figure 3] 2 is an enlarged view of a peeling means in the open roll mill of FIG. 1. FIG. [Figure 4] 10A and 10B are diagrams showing other forms of the peeling means. [Figure 5] FIG. 2 is a schematic diagram showing a state of the cutting device before cutting. [Figure 6] FIG. 10 is a schematic view showing the state of the cutting device in the incision forming step. [Figure 7] FIG. 10 is a schematic view showing the state of the cutting device in the peeling process. DETAILED DESCRIPTION OF THE INVENTION

[0019] The open-roll mixer of the present invention is a mixer that mixes materials such as rubber, plastics, and ceramics in an open system, and is distinguished from closed-type mixers. For example, rubber materials before vulcanization are pre-mixed in a closed-type mixer, and then mixed in an open-roll mixer until desired physical properties such as dispersion and viscosity are achieved.

[0020] Fig. 1 is a perspective schematic view of an embodiment of the open roll mill of the present invention. As shown in Fig. 1, the open roll mill 1 includes a pair of rolls 2A and 2B and a sheet-like kneading material M wound around the roll 2A. SThe pair of rolls 2A, 2B are arranged parallel to each other with a predetermined gap (roll gap) between them. The material to be kneaded is kneaded and rolled by the rotation of the pair of rolls 2A, 2B. In FIG. 1, the axial direction (generatrix direction) of the pair of rolls 2A, 2B is the X-axis direction, and the vertical direction is the Y-axis direction.

[0021] In Fig. 1, the pair of rolls 2A and 2B are configured so that their respective rotation shafts are connected via meshing gears (not shown) and they rotate in opposite directions in a synchronized manner. In Fig. 1, roll 2A rotates clockwise, and roll 2B rotates counterclockwise. Roll 2A is a drive roll that rotates by being connected to an electric motor, which is a driving means, and roll 2B is a driven roll that rotates by the driving force of the electric motor being transmitted via meshing gears. The electric motor may be equipped with a reducer, and may be configured to reduce the rotational force generated by the drive source before outputting it.

[0022] In the open roll mill 1 of Fig. 1, of the pair of rolls 2A and 2B, roll 2A is the drive roll, but instead of this configuration, roll 2B may be the drive roll. Also, the pair of rolls 2A and 2B may be independently driven by separate electric motors. In this case, meshing gears are not required.

[0023] FIG. 1 shows a pair of rolls 2A and 2B from above into which a material M to be kneaded is fed, and after being kneaded and rolled, a sheet-like material M of a certain thickness is applied to the outer peripheral surface of the roll 2A. S The method of winding the kneading material M around the roll 2A is not particularly limited, and may be performed manually or automatically by a conveyor device having a predetermined configuration.

[0024] In the past, an operator would use a cutting knife to make circumferential cuts and axial cuts on the sheet-like kneading material wound around a roll, and further guide the leading end of the cut tape-like kneading material. In contrast, the open roll machine 1 of the present invention is equipped with a cutting device 3 having a predetermined configuration, and thus the sheet-like kneading material M wound around the roll 2A can be cut without manual labor. s The configuration of the cutting device 3 will be described in detail below.

[0025] As shown in FIG. 1, the cutting device 3 is roughly divided into a cutting mechanism 4 and a peeling means 8. The cutting mechanism 4 cuts the kneaded material M S The cutting blade 5b is provided to cut the kneaded material M in the circumferential direction, and is used for the cut-off step. S from the roll 2A and is subjected to the peeling process.

[0026] 1 shows the state during the peeling process, with the cutting mechanism 4 and peeling means 8 each disposed at a position facing the outer peripheral surface of the roll 2A. The cutting mechanism 4 is located between a pair of arms 3a, 3a spaced apart in the X-axis direction and connected to the tips of the arms 3a, 3a. The peeling means 8 is located between a pair of arms 3b, 3b spaced apart in the X-axis direction and connected to the tips of the arms 3b, 3b.

[0027] As shown in FIG. 1, the height positions of the base ends of the pair of arms 3a, 3a and the pair of arms 3b, 3b are set to be approximately the same, and the arms are pivotal arms that pivot around the base ends. The length of the pair of arms 3a, 3a in the longitudinal direction (Y-axis direction) is longer than the length of the pair of arms 3b, 3b in the longitudinal direction (Y-axis direction). The distance between the pair of arms 3a, 3a in the X-axis direction is also longer than the distance between the pair of arms 3b, 3b in the X-axis direction. In FIG. 1, the stripping means 8 is disposed between the pair of arms 3a, 3a and in the space above the cutting mechanism 4. By disposing the cutting mechanism 4 and the stripping means 8 in this manner, space can be saved while still providing their respective functions.

[0028] In FIG. 1, the cutting mechanism 4 is disposed below the peeling means 8, and when viewed from the rotation direction of the roll 2A, the cutting mechanism 4 is disposed upstream of the peeling means 8 in the rotation direction of the roll 2A.

[0029] An enlarged view of the cutting mechanism is shown in Fig. 2. In Fig. 2, the cutting mechanism 4 has two cutting members 5A and 5B, a touch roll 6, and a pair of connecting members 7, 7. The cutting members 5A and 5B are arranged below the touch roll 6. The cutting members 5A and 5B have the same shape, and each has a flat base 5a and a cutting blade 5b fixed to the base 5a and projecting obliquely downward. The cutting blade 5b cuts the kneaded material M S The cutting blade 5b is not limited to a straight blade, but may be, for example, a circular rotary blade.

[0030] Two through holes are formed in the bases 5a of the cutting members 5A and 5B, with an upper slide shaft 5c inserted through the upper through hole and a lower slide shaft 5d inserted through the lower through hole. The upper and lower slide shafts 5c and 5d extend parallel to each other along the X-axis direction. The cutting members 5A and 5B are moved on the upper and lower slide shafts 5c and 5d to adjust the spacing between the pair of cutting blades 5b, 5b, thereby setting the width of the tape-shaped body. The width of the tape-shaped body is not particularly limited, but is, for example, approximately several tens of millimeters to 600 mm.

[0031] A touch roll 6 is provided above the cutting members 5A and 5B. The touch roll 6 is a rotatable cylindrical member and is arranged parallel to the roll 2A. When cutting, the kneaded material M wound around the roll 2A is cut. s It rotates when pressed against the

[0032] In the cutting mechanism 4, the cutting blades 5b of the cutting members 5A and 5B are configured to be swingable. Specifically, a swingable link mechanism is configured by a pair of connecting members 7, 7, the rotation shaft 6a of the touch roll 6, the upper slide shaft 5c, the lower slide shaft 5d, and a pair of arms 3a, 3a. The connecting member 7 is a flat plate member extending in one direction, and has three through holes formed linearly along its longitudinal direction. The connecting member 7 is arranged so that its longitudinal direction is along the Y-axis direction, and the rotation shaft 6a, the upper slide shaft 5c, and the lower slide shaft 5d are inserted into or engaged with, respectively, the through holes to connect them, in order from top to bottom. The pair of connecting members 7, 7 connect the parallel slide shafts 5c, 5d of the cutting blades and the rotation shaft 6a of the touch roll on both axial sides, respectively.

[0033] The touch roll 6 is rotatably supported by a connecting member 7, and the upper slide shaft 5c and the lower slide shaft 5d are fixed so as not to rotate relative to the connecting member 7. Each of the pair of connecting members 7 has a rotation shaft 7a coaxial with the slide shaft 5c, and the pair of arms 3a are rotatably supported by this rotation shaft 7a, thereby allowing the cutting blade 5b to swing.

[0034] In this configuration, the touch roll 6 s When the roll 2A is pressed against the touch roll 6, the touch roll 6 rotates in accordance with the rotation of the roll 2A, and the touch roll 6 is pushed by the roll 2A and tilts slightly counterclockwise. In conjunction with this movement, the cutting blade 5b also tilts counterclockwise, and the cutting blade 5b cuts the kneading material M s This allows the cutting edge of the cutting blade 5b to be inserted stably against the rotational force of the roll 2A.

[0035] The arms 3a, 3a to which the rotary shaft 7a of the connecting member 7 is connected are swivel arms, and by applying a swivel force to the link mechanism, the touch roll 6 connected to the link mechanism and the cutting blade 5b of the cutting member are moved to cut the kneaded material M. s Furthermore, by using a self-aligning bearing as the bearing provided between the connecting member 7 and the rotary shaft 7a, the cutting blades 5b provided on the cutting members 5A and 5B can be evenly pressed against the surface of the kneading material M. s The roller 2B can be pressed against the surface of the roller 2A.

[0036] The cutting mechanism is configured by connecting the cutting members 5A and 5B and the touch roll 6 with the connecting member 7, and cutting the kneaded material M s The configuration is not limited to one in which the cutting blade 5b and the touch roll 6 are pressed against the sheet simultaneously, but may be one in which the cutting blade is pressed against the sheet by an independent rotating mechanism, for example.

[0037] Next, Fig. 3 shows an enlarged view of the peeling means. In Fig. 3, the peeling means 8 has a peeling wheel 9a and a peeling blade 10. The peeling wheel 9a is arranged parallel to the roll 2A, and the kneaded material M s The scraping wheel 9a is configured to be pressed against the roll 2A and rotate in the same direction as the roll 2A. The scraping wheel 9a scrapes the kneaded material M between the pair of cutouts formed by the pair of cutting blades. s The sensor is positioned so that it is pressed against the sensor.

[0038] 3, the peeling wheel 9a is a component of the peeling assembly 9. Specifically, the peeling assembly 9 has the peeling wheel 9a, a friction roll 9b arranged coaxially with the peeling wheel 9a, and a transmission means (not shown) that reverses the rotation direction of the friction roll 9b and transmits it to the peeling wheel 9a. The transmission means can have a well-known configuration and is formed by combining gears, wheels, etc.

[0039] In FIG. 3, two friction rolls 9b are provided, and are arranged on both sides of the peeling wheel 9a in the axial direction. In this configuration, the friction rolls 9b, 9b are arranged to press the kneading material M s The frictional force causes the roll 2A to rotate in the opposite direction (counterclockwise in FIG. 3), and this rotational force is transmitted to the peeling wheel 9a via a transmission means, causing the peeling wheel 9a to rotate in the same direction as the roll 2A (clockwise in FIG. 3).

[0040] In the peeling assembly 9, the peeling wheel 9a and the friction roll 9b are cylindrical members having the same outer diameter. The axial length of the friction roll 9b is longer than the axial length of the peeling wheel 9a. The material of the peeling wheel 9a and the friction roll 9b is, for example, a metal such as iron or stainless steel. In the case of iron, it is preferable to apply hard chrome plating to the surface. However, without being limited to this, they may also be made of rubber or resin. Additionally, the peeling wheel 9a and the friction roll 9b may be made of the same material or different materials.

[0041] The outer peripheral surface of the peeling wheel 9a is a smooth cylindrical surface or a cylindrical surface with knurled grooves. This outer peripheral surface is not limited to a cylindrical surface, and may have blades (protrusions, etc.) arranged radially on the cylindrical surface. The outer peripheral surface of the friction roll 9b is primarily a smooth cylindrical surface.

[0042] The configuration for rotating the peeling wheel 9a in the same direction as the roll 2A is not limited to the configuration for reversing the rotational force of the friction roll 9b. For example, the peeling wheel 9a may be provided with an independent drive source, such as a built-in direct drive motor, and the drive source may rotate the peeling wheel 9a in the same direction as the roll 2A.

[0043] Alternatively, a one-way clutch may be provided to restrict the rotational direction of the peeling wheel 9a, allowing it to rotate only in the same direction as the roll 2A. Figure 4 shows a configuration of a peeling wheel 9a with a one-way clutch installed inside. When using a one-way clutch (not shown), as shown in Figure 4, the peeling assembly 9 does not have a friction roll, but instead has a peeling wheel 9a that rotates in only one direction relative to its shaft via a one-way clutch. The mixed material is wrapped around the roll 2A, but because the peeling wheel 9a only rotates clockwise, it encounters resistance from this wheel and tries to peel off from the roll 2A. As a result, the mixed material is pushed into the area formed by the roll 2A, the touch roll 6, and the peeling wheel 9a (see Figure 7). The touch roll 6 rotates counterclockwise, driven by power from the roll 2A, and the mixed material is sent to the next process (leftward).

[0044] 3 and 4, a stripping blade 10 is provided above the stripping wheel 9a. The stripping blade 10 has a base 10a with an L-shaped cross section and a claw 10b fixed to the base 10a and extending obliquely downward. The claw 10b is positioned so as to overlap the position of the stripping wheel 9a in the X-axis direction.

[0045] Next, the extrusion process using the extrusion device of the open roll machine will be explained using the schematic diagrams of Figures 5 to 7. These figures show the extrusion device and the roll around which the sheet-like kneaded material is wound, as viewed from the axial direction of the roll. Note that in these figures, the arms and friction rolls located on the front side of the paper are not shown.

[0046] First, Figure 5 shows a state in which the material is being kneaded or rolled in the open roll mill 1. During this kneading or rolling, the extrusion device 3 is placed in a standby position R where it does not interfere with other members (such as a conveyor device). At this standby position R, the arms 3a and 3b are positioned so as to extend horizontally, and the cutting blade 5b and the like do not face the outer circumferential surface of the roll 2A.

[0047] Then, the kneading or rolling is completed, and the sheet-like kneaded material M having a uniform thickness is applied to the roll 2A. s Once the wire is wrapped around the wire, the cutting process is carried out. This cutting process mainly comprises a cutting step and a peeling step, and each step is shown in Figures 6 and 7.

[0048] As shown in Fig. 6, in the incision forming step, the cutting mechanism 4 of the extrusion device 3 is moved from the standby position R to a position facing the outer circumferential surface of the roll 2A. Specifically, the arm 3a is rotated by a driving device (not shown) to displace the cutting mechanism 4, and in Fig. 6, the arm 3a is in a substantially upright position. Then, the touch roll 6 is moved to the position facing the kneaded material M wound around the roll 2A. s At this time, the touch roll 6 presses the kneading material M s The frictional force from the surface of the roll 2A causes the roll 2A to rotate in the opposite direction to the roll 2A and pushes the roll 2A slightly outward. s As a result, the kneading material M wound around the roll 2A s Circumferential cuts are formed in the roll 2A, and the tape-like kneading material is wound around the roll 2A.

[0049] After the incisions are formed, the rotation of the pair of rolls 2A and 2B is stopped or slowed down to rotate at a very slow speed.

[0050] Next, in the peeling process, as shown in Fig. 7, the peeling means 8 of the extrusion device 3 is moved from the standby position R to a position facing the outer circumferential surface of the roll 2A. Specifically, the arm 3b is rotated by a drive device (not shown) to displace the peeling means 8. It is preferable that the arms 3a and 3b are rotated by the same drive device.

[0051] The arm 3b is rotated to remove the scraping assembly and the kneaded material M s In FIG. 7, the arm 3b has its tip inclined toward the side close to the roll 2A, and the peeling wheel 9a is located in the upper half area of ​​the roll 2A and presses the kneading material M between the pair of notches. s Next, the claws 10b of the scraping blade provided above the scraping wheel 9a are pressed against the kneaded material M. s Pierce it.

[0052] In this state, the pair of rolls 2A and 2B start to rotate, or accelerate to rotate at normal speed.

[0053] Then, the kneading material M s The friction roll of the peeling assembly is driven by the friction force with the scraping wheel 9a, and the scraping wheel 9a rotates in the reverse direction in conjunction with the friction roll. s A tensile force acts on the stripping blade, and the tape-shaped kneaded material M s The tape tip is cut off to form a tape tip. This tape tip is transported to the conveyor device for the next process from between the touch roll 6 and the peeling wheel 9a. In the state shown in FIG. 7, the distance d between the outer peripheral surface of the peeling wheel 9a and the touch roll 6 is s It is preferable that the thickness d is larger than the thickness t of the insulating film (d>t).

[0054] Then, the sheet-shaped kneading material M s After the tape-shaped material has been cut out, the arm 3b is rotated to the standby position R side, and the kneaded material M of the peeling assembly is s Release the pressure on the

[0055] By the above-described series of operations of the open roll mill of the present invention, cutting out of the material to be kneaded, which has previously required manual labor in kneading using an open roll mill, can be automated.

[0056] The open roll mill of the present invention is not limited to the above-described configuration, and may be modified as appropriate within the scope of the effects of the present invention. [Industrial Applicability]

[0057] The open roll mill of the present invention can reduce the workload of the worker involved in cutting out the material to be kneaded from the rolls, and can therefore be widely used as an open roll mill. [Explanation of symbols]

[0058] 1 Open roll machine 2A, 2B rolls 3 Cutting device 3a Arm 3b Arm 4 Cutting mechanism 5A, 5B Cutting material 5a base 5b cutting blade 6 Touch Roll 6a Rotation axis 7 Connecting members 8 Stripping Method 9 Stripped Assy 9a Stripping Wheel 9b Friction Roll 10 Stripping Blade 10a base 10b Claw piece M s Sheet-shaped mixing material

Claims

1. An open roll mill having a pair of rolls that rotate to mix or roll a mixed material and a cutting device that cuts out a tape-shaped material from a sheet-shaped mixed material wound around one of the rolls, The cutting device includes a cutting blade that makes a circumferential cut in the sheet-like kneaded material wound around one of the rolls, and a peeling means that peels off the cut kneaded material from the one of the rolls, The peeling means is arranged parallel to one of the rolls, pressed against the kneaded material with the notches, and characterized by having a peeling wheel configured to rotate in the same direction as the one of the rolls.

2. The peeling means includes a friction roll arranged coaxially with the peeling wheel, and a transmission means for reversing the rotation direction of the friction roll and transmitting the rotation direction to the peeling wheel, The open roll mill according to claim 1, characterized in that the friction roll is pressed against the kneaded material with the notches and rotates in the opposite direction to the one of the rolls, and the rotational force is transmitted to the peeling wheel via the transmission means, causing the peeling wheel to rotate in the same direction as the one of the rolls.

3. 2. The open roll machine according to claim 1, wherein the peeling means has a one-way clutch, and the rotation direction of the peeling wheel is restricted by the one-way clutch so that the peeling wheel rotates only in the same direction as the one roll.

4. The open roll machine according to claim 1, characterized in that the cutting device has, as a cutting mechanism, the cutting blade, a touch roll that is pressed against the wound mixed material, and a pair of connecting members that connect the sliding shaft of the cutting blade and the rotation shaft of the touch roll, which are parallel to each other, on both axial sides, and the pair of connecting members are rotatably supported, thereby allowing the cutting blade to swing.

5. The open roll machine according to claim 4, characterized in that the cutting mechanism is arranged in a standby position where it does not interfere with other members during kneading or rolling, and is arranged in a position facing the outer peripheral surface of one of the rolls from the standby position during cutting.

6. 5. The open roll mill according to claim 4, wherein the distance between the outer peripheral surface of the scraping wheel and the outer peripheral surface of the touch roll is greater than the thickness of the sheet-like kneading material.

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