Open Roll Machine

Abstract

To provide an open roll machine capable of reducing the workload of an operator involved in cutting out a kneaded material from a roll. The open roll machine 1 kneads or rolls a material M to be kneaded by rotating a pair of rolls 2A and 2B, and the sheet-like material M wound around the roll 2A is kneaded or rolled by rotating a pair of rolls 2A and 2B. s The cutting device 3 cuts out a tape-shaped material M wound around the roll 2A. s A cutting blade 5b cuts the material M in the circumferential direction. s The stripping means 8 is disposed in parallel with the roll 2A and strips the kneaded material M s The roll 2A has a peeling wheel 9a configured to be pressed against the roll 2A and to rotate in the same direction as the roll 2A.

Description

[Technical field]

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

[0002] Conventionally, an open roll machine is known as a device for kneading or rolling various materials. In this open roll machine, two horizontal rolls are arranged parallel to each other with a gap therebetween, 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 to be kneaded. In the open roll machine, 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. When the wound material to be kneaded passes through the gap as the rolls rotate, it is rolled to a certain thickness (see, for example, Patent Document 1).

[0003] During rolling, compressive, tensile and shear forces are applied to the material to be kneaded. During deformation, the material is crushed, distributed and dispersed to become homogenous. At the same time, internal stress is generated, which causes the entanglement of polymer chains in the material to loosen and the molecular weight to change, resulting in a kneading action. The material to be kneaded is sent to a reservoir (also called a bank) above the material to be kneaded as the front roll rotates. In the bank, the rolled and circulated material is replaced with all or part of the remaining material to promote homogenization of the material and the kneading action. To promote the replacement of the material to be kneaded, an operator may be involved 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, the sheet-like kneaded material wound around the front roll is mainly cut out by hand. Specifically, multiple cutting knives are pressed against the sheet-like kneaded material to make cuts in the circumferential direction of the front roll, and then the material is cut between the two cuts in the generatrix direction of the front roll with another blade, and the leading end of the cut tape-like kneaded material is manually pinched to cut out the tape-like body. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2016-120664 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, the operation 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 consideration 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 machine of the present invention is an open roll machine that kneads or rolls a kneaded material by rotating a pair of rolls and has a cutting device that cuts out a tape-shaped body from the sheet-like kneaded material wound around one of the rolls, the cutting device having a cutting blade that makes a circumferential cut in the sheet-like kneaded material wound around the one of the rolls and a peeling means that peels off the kneaded material with the cut from the one of the rolls, the peeling means having a peeling wheel that is arranged parallel to the one of the rolls and is pressed against the kneaded material with the cut and configured to rotate in the same direction as the one of the rolls. Note that in the present invention, kneading or rolling is a concept that encompasses aspects in which either one of kneading and 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 rotational 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 pressed against the wound mixed material, and a pair of connecting members connecting the sliding shaft of the cutting blade and the rotating shaft 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 supporting the rotation of the pair of connecting members.

[0013] The cutting mechanism is configured to be disposed at a standby position where it does not interfere with other members during kneading or rolling, and to be disposed at a position facing the outer circumferential surface of one of the rolls from the standby position during cutting. Specifically, the cutting mechanism is connected to an end of a rotatable arm, and is disposed at a position facing the outer circumferential surface of one of the rolls by rotating the arm from an upper standby position not facing the outer circumferential surface of one of the rolls during cutting.

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

[0015] In the open roll machine of the present invention, the cutting device for cutting out a tape-like body from a sheet-like kneaded material wound around one of the rolls includes a cutting blade for making a circumferential cut in the kneaded material wound around one of the rolls, and a peeling means for peeling off the kneaded material with the cut from the one of the rolls, and the peeling means has a peeling wheel arranged parallel to the one of the rolls, pressed against the kneaded material with the cut and configured to rotate in the same direction as the one of the rolls, so that the formation of the cut and the peeling in the cutting work can be performed automatically, reducing the burden on the worker of cutting out the kneaded material from the roll. In this way, cutting out, which had to be done manually in kneading using an open roll machine, can be automated.

[0016] The peeling means has a friction roll pressed against the notched mixed material and rotating in the opposite direction to the other roll, 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 roll, so that no separate drive means is required to rotate the peeling wheel and the peeling means can be made compact.

[0017] The cutting device has a cutting mechanism including a cutting blade, a touch roll, and a pair of connecting members that connect the parallel sliding axis of the cutting blade and the rotating axis of the touch roll on both axial sides, and the pair of connecting members are rotatably supported to configure the cutting blade to be swingable. This makes it easier for the cutting blade to cooperate with the touch roll to be pressed into the sheet-like mixed material, thereby enabling stable formation of incisions. [Brief description of the drawings]

[0018] [Figure 1] 1 is a schematic perspective view of an open roll machine according to an embodiment of the present invention; [Diagram 2] FIG. 2 is an enlarged view of a cutting mechanism in the open roll machine of FIG. [Diagram 3] 2 is an enlarged view of a peeling means in the open roll machine of FIG. 1. [Figure 4] 13A and 13B are diagrams showing other forms of the peeling means. [Diagram 5] FIG. 2 is a schematic diagram showing a state of the cutting device before cutting. [Figure 6] FIG. 11 is a schematic diagram showing a state of the cutting device in a cut forming step. [Figure 7] FIG. 13 is a schematic diagram showing the state of the cutting device in the peeling process. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] The open roll mill of the present invention is a kneader that kneads materials such as rubber, plastics, and ceramics in an open system, and is distinguished from closed-type kneaders. For example, rubber materials before vulcanization are pre-kneaded in a closed-type kneader, and then kneaded in an open roll mill until the desired physical properties such as dispersion and viscosity are obtained.

[0020] Fig. 1 is a perspective schematic diagram of an open roll mill according to an embodiment 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) therebetween. 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, 2B are configured such that their respective rotation shafts are connected via meshing gears (not shown) and rotate in opposite directions in an interlocking manner. In Fig. 1, the roll 2A rotates clockwise, and the roll 2B rotates counterclockwise. The roll 2A is a drive roll that rotates by being connected to an electric motor serving as a driving means, and the 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 reduction gear, and may be configured to reduce the rotational force generated from a driving source before outputting it.

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

[0023] FIG. 1 shows a pair of rolls 2A and 2B from above into which a material M is fed, and after being mixed and rolled, a sheet-like material M having 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 cut the sheet-like kneading material wound around a roll in the circumferential direction, cut it in the axial direction, and guide the tip 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 for the cutting step of cutting the mixed material M having the cuts in the circumferential direction. S from the roll 2A and is subjected to the peeling process.

[0026] 1 shows the state during the peeling process, in which the cutting mechanism 4 and the peeling means 8 are disposed at positions 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 root end of the pair of arms 3a, 3a and the pair of arms 3b, 3b are set to be approximately the same, and the pair of arms 3a, 3a are pivotable arms that pivot around the root end. 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 separation distance (X-axis direction) between the pair of arms 3a, 3a is longer than the separation distance (X-axis direction) between the pair of arms 3b, 3b. In FIG. 1, the peeling means 8 is disposed between the pair of arms 3a, 3a and in the space above the cutting mechanism 4 so that it fits therein. By disposing the cutting mechanism 4 and the peeling means 8 in this manner, it is possible to achieve space saving while still achieving the respective functions of these mechanisms.

[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 disposed 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 protruding obliquely downward. The cutting blade 5b cuts the kneaded material M S The cutting blade 5b is not limited to a straight blade, and 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, and the upper slide shaft 5c is inserted into the upper through hole, and the lower slide shaft 5d is inserted into 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 distance between the pair of cutting blades 5b and 5b, thereby setting the width dimension of the tape-like body. The width dimension of the tape-like body is not particularly limited, but is, for example, about several tens of mm to 600 mm.

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

[0032] In the cutting mechanism 4, the cutting blades 5b of the cutting members 5A and 5B are configured to be able to swing. Specifically, a swingable link mechanism is configured by a pair of connecting members 7, 7, the rotating shaft 6a of the touch roll 6, the upper slide shaft 5c, the lower slide shaft 5d, and a pair of arms 3a, 3a, etc. The connecting member 7 is a flat plate member extending in one direction, and three through holes are formed linearly along the longitudinal direction. The connecting member 7 is provided so that its longitudinal direction is along the Y-axis direction, and the rotating shaft 6a, the upper slide shaft 5c, and the lower slide shaft 5d are inserted or engaged into the respective through holes, in that order from above, to be connected. The pair of connecting members 7, 7 connect the sliding shafts 5c and 5d of the cutting blades and the rotating shaft 6a of the touch roll, which are parallel to each other, 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 to the connecting member 7 so as not to rotate. Each of the pair of connecting members 7, 7 has a rotation shaft 7a coaxial with the slide shaft 5c, and the pair of arms 3a, 3a are rotatably supported by this rotation shaft 7a. This allows the cutting blade 5b to swing.

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

[0035] In addition, the arms 3a, 3a to which the rotating shaft 7a of the connecting member 7 is connected are pivot arms, and by applying a pivoting 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 the kneading material M. s Furthermore, by using a self-aligning bearing as the bearing provided between the connecting member 7 and the rotating shaft 7a, the cutting blades 5b provided on the cutting members 5A and 5B can be evenly pressed against the surface of the roll 2A. 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 is arranged to peel 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 cuts formed by the pair of cutting blades. s It is positioned so that it is pressed against the

[0038] In Fig. 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 configured by combining gears, wheels, etc.

[0039] In FIG. 3, two friction rolls 9b are provided, and are arranged on both axial sides of the peeling wheel 9a. In this configuration, the friction rolls 9b, 9b are arranged to push the kneading material M s The frictional force causes the roll 2A to rotate in the opposite direction (counterclockwise in FIG. 3), and the 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, and in the case of iron, it is preferable to apply hard chrome plating to the surface. In addition, without being limited to this, they may be made of rubber or resin. In addition, 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. The outer peripheral surface is not limited to a cylindrical surface, and may have radial blades (projections, etc.) on the cylindrical surface. The outer peripheral surface of the friction roll 9b is mainly 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 peeling wheel 9a may be rotated in the same direction as the roll 2A by the drive source.

[0043] Also, a one-way clutch may be provided so that the direction of rotation of the peeling wheel 9a is restricted by the one-way clutch, so that the peeling wheel 9a can rotate only in the same direction as the roll 2A. FIG. 4 shows the form of the peeling wheel 9a with a one-way clutch provided inside. As shown in FIG. 4, when a one-way clutch (not shown) is used, a friction roll is not provided in the peeling assembly 9, and a peeling wheel 9a that rotates only in one direction with respect to the shaft by a one-way clutch is provided. The kneaded material is wound around the roll 2A, but since the peeling wheel 9a only rotates clockwise, it receives resistance from this wheel and tries to peel off from the roll 2A. As a result, it is pushed into the area formed by the roll 2A, the touch roll 6, and the peeling wheel 9a (see FIG. 7). The touch roll 6 rotates counterclockwise by being transmitted from the roll 2A through the kneaded material, so the rubber pushed into the above area is sent to the next process (left direction).

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

[0045] Next, the cutting process by the cutting device of the open roll machine will be described with reference to the schematic diagrams of Figures 5 to 7. These figures show the cutting device and the roll on 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 omitted.

[0046] First, Fig. 5 shows a state in which the material is being kneaded or rolled in the open roll machine 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). In this standby position R, the arms 3a and 3b are placed 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 constant thickness is applied to the roll 2A. s When the wire is wound around the wire, a cutting process is carried out. This cutting process mainly includes a cutting step and a peeling step, and each step is shown in FIG. 6 and FIG. 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 where the kneaded material M wound around the roll 2A is moved. s At this time, the touch roll 6 presses against 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 kneaded material is wound around the roll 2A.

[0049] After the incisions are formed, the rotation of the pair of rolls 2A, 2B is stopped or decelerated 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. Note that it is preferable to rotate the arms 3a and 3b by the same drive device.

[0051] Rotate the arm 3b to remove the mixed material M s In FIG. 7, the arm 3b is inclined such that its tip is close to the roll 2A, and the peeling wheel 9a is located in the upper half of the roll 2A and presses the kneaded material M between the pair of notches. s Next, the claws 10b of the peeling blade provided above the peeling wheel 9a are pressed against the kneaded material M. s Pierce it into.

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

[0053] Then, the mixed material M s The friction roll of the peeling assembly rotates due to the frictional force between the roller and the scraping wheel 9a, and the scraping wheel 9a rotates in the reverse direction. s A tensile force acts on the stripping blade 10b, and the stripped material M s The tape tip is cut off to form a tape tip. This tape tip is transported between the touch roll 6 and the peeling wheel 9a to the conveyor device for the next process. 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 d is greater than the thickness t of the insulating film (d>t).

[0054] And, the sheet-shaped kneading material M s After the tape-shaped material is cut out, the arm 3b is rotated to the standby position R side to remove the mixed material M of the peeling assembly. s Release the pressure on the

[0055] By the above-mentioned series of operations of the open roll mill of the present invention, the 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 machine of the present invention is not limited to the above-mentioned configuration, and may be modified as appropriate within the scope of the effect of the present invention. [Industrial Applicability]

[0057] The open roll machine of the present invention can reduce the workload of an operator involved in cutting out a material to be kneaded from a roll, and can therefore be widely used as an open roll machine. [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 machine that kneads or rolls a kneaded material by rotating a pair of rolls and has a cutting device that cuts out a tape-shaped body from a sheet-shaped kneaded material wound around one of the rolls, The cutting device includes a cutting blade that cuts a circumferential cut into the sheet-like kneaded material wound around the one roll, and a peeling means that peels off the cut kneaded material from the one roll, The peeling means is arranged parallel to one of the rolls, pressed against the kneaded material with the notches, and characterized in that it has 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 machine according to claim 1, characterized in that the friction roll is pressed against the kneaded material having 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, so that the peeling wheel rotates 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 of the rolls.

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 that the cutting blade is configured to be swingable by supporting the rotation of the pair of connecting members.

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 circumferential surface of one of the rolls from the standby position during cutting.

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

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