Manufacturing method of rolling roller, and rolling roller

Abstract

To provide rolling rollers capable of securing both: capturing performance that enables a pair of rolling rollers to tightly pinch dough mass and molding of a noodle belt having a predetermined thickness; and high detachability that does not leave dough on surfaces of the rollers after rolling.SOLUTION: A manufacturing method includes: a deboss processing step of subjecting a surface of an outer peripheral trunk part of a metal roller core having support shafts on both end parts thereof and made entirely columnar to shot-peening processing in order to form a hemispherical recess by projecting a steel ball having a diameter of 1.18 mm or more and 1.7 mm or less, and of rendering the surface of the outer peripheral trunk part of the roller core a deboss-processed surface formed of surface roughness with arithmetic average roughness of 6.3 or more and 100 or less; and a step of placing in a chamber having a predetermined degree of vacuum the roller core having the surface of the outer peripheral trunk part, the surface rendered the deboss-processed surface in the deboss processing step, and forming on the deboss-processed surface a diamond-like carbon layer along a recessed shape of the recess, the diamond-like carbon layer having a film thickness of 1 μm or more and 10 μm or less.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a rolling roller for rolling out block-shaped dough for making noodles that is formed by adding water to edible powder and kneading the mixture, and to a method for manufacturing the same. [Background technology]

[0002] A rolling roller is used to roll out dough for making noodles, which is formed by adding water or kneading water to wheat flour or other edible powder and kneading the dough, to form a sheet-like noodle band of a specified thickness. A rolling roller sandwiches the dough between a pair of rollers and rotates in a specified direction to form a noodle band of a specified thickness. Conventional rolling rollers are made of cast iron, iron, stainless steel, light metal, etc., and the surface of the rolling roller is subjected to surface treatment such as polishing, plating, and fluororesin coating. In this rolling roller, in order to remove starch and other components in wheat flour that adhere to the surface of the roller, the front end of a metal or resin plate-like member called a scraper or kasuri (kasuri) is in contact with the surface of the roller while the roller is rotated. By using a scraper or kasuri, the noodle band can be peeled off while removing the adhesions on the surface of the roller, preventing the noodle band from wrapping around the roller, and making it possible to supply the noodle band of a specified thickness to the next rolling roller. An example of such a scraper is the scraper described in Patent Document 1. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 10-225256 A (Applicant: Tom Co., Ltd.) [Patent Document 2] Patent No. 5738239 (Applicant: Sodick Co., Ltd.) [Patent Document 3] JP 2005-341831 A (Applicant: Yutaka Manufacturing Co., Ltd. et al.) [Patent Document 4] JP 2010-279316 A (Applicant: Sodick Co., Ltd.) Summary of the Invention [Problem to be solved by the invention]

[0004] However, when rolling is performed using a pair of upper and lower rolling rollers, if deposits are removed from each rolling roller with a scraper or scraper, there is a risk that the deposits removed from the lower roller will fall below the noodle sheet, and the deposits removed from the upper roller will fall onto the noodle sheet. The deposits that fall onto the noodle sheet from the upper roller will have a different color from the noodle sheet and will reduce the uniformity of the noodle sheet's thickness, which may affect the product value. Furthermore, although the deposits removed from the lower roller do not fall onto the noodle sheet, they will fall onto the floor, etc., and must be cleaned up after the work is completed, which requires additional work time and generates waste of starch, etc.

[0005] To address this issue, it has been proposed to coat the surface of the rolling roller with a fluororesin to improve the release of the material, or to form the roller surface or the coating in an uneven shape. This type of coating or uneven shape significantly reduces the amount of deposits remaining on the surface of the rolling roller, making it possible to create a configuration that does not require the use of scrapers or scrapers.

[0006] For example, the roughing roll described in Patent Document 2 has grooves with a V-shaped cross section formed at a specified pitch on the outer circumferential surface of the roll that are parallel to the central axis of the rotating shaft, and is configured so that in the gap between a pair of rolls, when the outer circumferential surface of one roll has grooves, the outer circumferential surface of the other roll is always flat and free of grooves. With this configuration, noodle particles are less likely to slip and are reliably gathered in the gap between the roughing rolls, where they are pressed together to form a noodle dough mass, producing a noodle dough plate with no voids that can be sent out, thereby suppressing the generation of noodle waste.

[0007] However, in a groove with a V-shaped cross section, if the feed speed by the roll or the viscoelasticity of the dough core are adjusted within a certain range, it is possible that the dough part that has entered the groove will be able to escape in the feed direction of the noodle dough plate, but depending on the feed speed or the viscoelasticity of the dough core, there is a risk that the dough part will remain in the groove. Furthermore, because this V-shaped groove is formed so as to be almost perpendicular to the feed direction, it may gradually become filled with noodle residue over long-term use, reducing peelability and increasing the risk of dough sticking to the flat surface of the roller. If the groove becomes filled with noodle residue, the noodle sheet will easily wrap around the roller, making the rolling operation difficult, and the noodle residue that has accumulated in the groove will need to be removed, which means that the rolling process must be stopped.

[0008] In addition, the applicant tried to test the rolling performance of the dough by applying uneven knurling with various types of knurling pieces and various degrees of roughness to the roller surface by knurling, but the uneven shape of the concave portion of the roller surface by knurling was V-shaped, which caused a problem that the concave portion was likely to remain on the dough surface.

[0009] In the rolling roller described in Patent Document 3, the surface of the roller base material is coated with a fluororesin layer, and a thermal spray layer made of a material that bonds the surface of the roller base material and the fluororesin layer is formed between them. This makes it possible to configure the roller without using scrapers or scrapers. However, depending on the usage conditions, the releasability of the surface of the fluororesin layer decreases after about a year, making it easy for dough to stick to it. If the dough adhesion increases, the noodle sheet tends to wrap around the roller, making the rolling operation difficult, and it becomes necessary to replace the rolling roller with an unused one, which results in a long-term stoppage of operations and an increase in costs due to the purchase of a new rolling roller.

[0010] In the rough roll described in Patent Document 4, the hollow or protruding portions are evenly distributed on the outer peripheral surface of the cylindrical belt constituting the main body, and the entire outer peripheral surface is coated with a fluororesin. This configuration achieves both the releasability of the noodle sheet base mold, the collecting force for collecting the noodle grains in the gap between the pair of rolls, and the gripping force for attaching the noodle sheet base mold, and thus makes it possible to stably produce and send out the noodle sheet base mold for a relatively long period of time. However, the releasability of the surface of the fluororesin layer decreases after about a year depending on the usage conditions, so that the dough tends to adhere to the flat surface and there is a risk that the dough will adhere and accumulate in the hollow portions. When such a defect occurs, it is necessary to remove the dough accumulated in the hollow portions or replace the rough roll with an unused one, which causes a long stop in operations and increases costs due to the purchase of new rolling rollers.

[0011] Therefore, the present invention aims to provide a rolling roller and a method for manufacturing a rolling roller that can maintain both the bite ability that enables the dough to be firmly sandwiched between a pair of rolling rollers to form a noodle sheet of a predetermined thickness even without the use of a scraper or scraper, and the high releasability that prevents dough from remaining on the surface of the rollers after rolling for a longer period of time than when a fluororesin coating is used, thereby realizing the formation of noodle sheets of consistent quality and preventing the noodle sheet from getting caught in the noodle sheet, and suppressing increases in costs due to the high releasability, and capable of steadily supplying noodle sheets of consistent quality. [Means for solving the problem]

[0012] In order to solve the above-mentioned problems, the method for manufacturing a rolling roller of the present invention is a method for rolling a lump-shaped dough for producing noodles formed by adding water to an edible powder and kneading it, and comprises the steps of: a devising step of blasting steel balls having a diameter of 1.18 mm or more and 1.7 mm or less against the surface of an outer circumferential body of a metal roller core material having an overall cylindrical shape with support shafts at both ends, to form hemispherical recesses, thereby forming a debossed surface on the surface of the outer circumferential body of the roller core material with an arithmetic mean roughness of 6.3 or more and 100 or less; and a step of placing the roller core material whose outer circumferential body surface has been debossed in the devising step, in a chamber having a predetermined vacuum degree, and forming a diamond-like carbon layer on the devised surface conforming to the concave shape of the recesses, wherein the diamond-like carbon layer has a thickness of 0.1 μm or more and 10 μm or less.

[0013] In the method for manufacturing a rolling roller of the present invention, the roller core material is preferably held rotatably in the circumferential direction within a chamber, and a diamond-like carbon layer is formed on the entire surface of the outer peripheral body portion on which the debossed surface is formed.

[0014] The rolling roller of the present invention is a rolling roller for adding water to an edible powder and kneading the resulting block of dough for making noodles, and then rolling the resulting dough into a sheet-like noodle strip of a predetermined thickness, the rolling roller comprising a metal roller core having an overall cylindrical shape with support shafts at both ends, the surface of the outer circumferential body of the roller core being formed with hemispherical recesses to form a embossed surface having an arithmetic mean roughness of 6.3 or more and 100 or less, and the rolling roller comprising a diamond-like carbon layer formed on the embossed surface along the concave shape of the recesses.

[0015] In the pressure roller of the present invention, it is preferable that the recesses are hemispherical with a diameter of 1.18 mm or more and 1.7 mm or less, and the diamond-like carbon layer has a film thickness of 0.1 μm or more and 10 μm or less. Effect of the Invention

[0016] According to the present invention, a hemispherical recess is formed on the surface of the roller core material to provide a debossed surface with a predetermined surface roughness that makes it difficult for the material to remain on the surface, so that the material is reliably bitten into and the rolling performance is ensured, and the material is easily released from the recess, realizing high releasability and reducing defects caused by the material remaining on the surface. Furthermore, in the present invention, a diamond-like carbon layer is formed along the recess shape of the debossed surface, so that a recess shape that achieves both biting and releasability can be maintained, and the diamond-like carbon material is located on the surface, so that the releasability can be further improved, so that the material is extremely rarely left in the recess after long-term use, and therefore the replacement cycle of the rolling roller can be significantly longer than before, and there is no defect such as the material remaining in the recess during use being mixed into the material introduced later, so that a consistent and high quality material can be provided. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1A is a perspective view showing a pair of rolling rollers according to an embodiment of the present invention arranged for rolling, and FIG. 1B is a perspective view showing a state in which the rolling rollers shown in FIG. 1A are rotatably mounted on a support base. [Diagram 2] FIG. 2 is a diagram showing an example in which a dough mass is rolled into dough for producing noodles by a pair of rolling rollers. [Diagram 3] FIG. 2A is a cross-sectional view showing an example of the concave shape of the recesses on the debossed surface, and FIG. 2B is an enlarged view showing an example of the configuration of the debossed surface on the surface of the roller core of a rolling roller. [Figure 4] FIG. 2A is an enlarged cross-sectional view showing an example of a recess on a debossed surface, and FIG. 2B is a cross-sectional view showing a state in which a diamond-like carbon layer is formed on the debossed surface. [Diagram 5] FIG. 1 is a diagram showing a schematic configuration of a film forming apparatus as an example when forming a film by a sputtering method of a PVD method. [Figure 6] FIG. 3 is a diagram showing a schematic configuration when the rolling roller shown in FIG. 1 and FIG. 2 is used as a rolling roller in a continuous rolling process. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, a rolling roller and a manufacturing method for a rolling roller according to an embodiment of the present invention will be described in detail with reference to the drawings. In the following description, "noodles" is a general term including udon, soba, somen and other noodles, as well as gyoza wrappers and wonton wrappers.

[0019] FIG. 1(a) is a perspective view showing a pair of rolling rollers 10 according to the present embodiment arranged for rolling, and FIG. 1(b) is a perspective view showing a state where the rolling roller 10 shown in FIG. 1(a) is rotatably mounted on support bases 40, 40. FIG. 2 is a diagram showing an example of rolling a dough mass D1 into a dough D2 for producing noodles by a pair of rolling rollers 10, 10. In FIG. 2, the rolling roller 10 is shown as a cross section perpendicular to its rotation axis 10A. FIG. 3(a) is a cross section showing an example of the concave shape of the recesses 22 on the debossed surface 21, and FIG. 3(b) is an enlarged view showing an example of the configuration of the debossed surface 21 on the surface of the roller core material 20. FIG. 4(a) is an enlarged cross section showing an example of the recesses 22 on the debossed surface 21, and FIG. 4(b) is a cross section showing a state where a diamond-like carbon layer 30 is formed on the debossed surface 21. In the following description, the direction along the rotation axis 10A of the rolling roller 10 shown in Figure 1(a) is referred to as the axial direction, the direction along the circumference centered on this rotation axis 10A is referred to as the circumferential direction, and the direction passing through the rotation axis 10A in a plane perpendicular to the rotation axis 10A is referred to as the radial direction.

[0020] As shown in FIG. 1(a), the rolling roller 10 is generally cylindrical with a rotating shaft 10A as the central axis, and is configured as a pair of rollers arranged with a gap 10B (see FIG. 2) of a predetermined distance G therebetween for rolling. The rolling roller 10 is provided with a cylindrical support shaft 11 with the rotating shaft 10A as the central axis at both ends in the axial direction. As shown in FIG. 1(b), the pair of rolling rollers 10, 10 are supported by a set of support bases 40 at the support shafts 11 at both ends, and are each rotatable around the rotating shaft 10A. A drive source (not shown) is connected to the support base 40 for rotating one of the pair of rolling rollers 10 (drive roller) at a predetermined speed. When the dough mass D1 is supplied to the pair of rolling rollers 10, 10 and the driving roller is rotated by the driving source with the dough mass D1 entering the gap 10B, the other of the pair of rolling rollers (the driven roller) rotates according to the rotation of the driving roller through the dough mass D1 in the gap 10B. In this way, by supplying the dough mass D1 and rotating the pair of rolling rollers 10, 10, a sheet-like dough D2 having a thickness according to the interval G between the pair of rolling rollers 10, 10 in the gap 10B is discharged from the pair of rolling rollers 10, 10 (in the direction of the arrow in FIG. 2).

[0021] As shown in Fig. 2, the rolling roller 10 includes a metallic roller core 20 having an overall cylindrical shape with a rotation axis 10A as the central axis, and a diamond-like carbon layer 30 formed on the surface of the outer peripheral body of the roller core 20. The roller core 20 has a rotation axis 20A that coincides with the rotation axis 10A of the rolling roller 10, and has an overall cylindrical shape with the rotation axis 20A as the central axis. The roller core 20 uses a metal with appropriate hardness and physical properties depending on the physical properties of the dough core D1 to be rolled for the dough for making noodles, the durability in the rolling process, the hardness and projection speed of the steel ball used in the shot peening process described below, and the like. For example, stainless steel or brass having a hardness in the same range as the steel ball is used.

[0022] As shown in Figs. 3(a), (b) and 4(a), the surface of the outer circumferential barrel of the roller core material 20 is formed with randomly formed semispherical recesses 22 to form a debossed surface 21. The debossed surface 21 is formed by performing a shot peening process in which a large number of steel balls are projected against the surface of the outer circumferential barrel of the roller core material 20 to form recesses 22 having a semispherical recess shape conforming to the spherical shape of the steel balls (debossing process). In order to achieve both the biting of the material during rolling and good peeling of the material, the semispherical recess shape of the recesses 22 is preferably a curved shape that is half or less than the spherical surface of the steel ball, and is preferably not a curved shape that exceeds half the spherical surface of the steel ball. In addition, from the viewpoint of both biting of the material during rolling and good peeling of the material, the debossed surface 21 is preferably a surface roughness of 6.3 to 100 in arithmetic mean roughness.

[0023] In order to form the debossed surface 21 in such a shape, the hardness and diameter of the steel balls projected onto the roller core material 20, as well as the speed, density, and number of steel balls projected are adjusted. When the diameter of the roller core material 20 is 60 mm to 600 mm, it is preferable to set the diameter of the steel balls to 1.18 mm or more and 1.7 mm or less, since this allows the debossed surface 21 to be formed in such a way that the dough can be easily bitten into and peeled off during rolling. When the Vickers hardness of the steel balls is in the range of 160 to 180, for example, the roller core material 20 is preferably made of brass with a Vickers hardness in the range of 80 to 150, or austenitic stainless steel, ferritic stainless steel, or precipitation hardening stainless steel with a Vickers hardness in the range of about 180 to 380, since this makes it easier to form the desired hemispherical concave shape in the recesses 22.

[0024] 4(b), a diamond-like carbon layer 30 is formed on the recesses 22 of the debossed surface 21 and on the flat surface where the recesses 22 are not formed, i.e., on the entire surface of the outer circumferential body of the roller core material 20, following the shape of the recesses 22 and maintaining the curved shape of the recesses 22. When the recesses 22 are formed using the above-mentioned steel balls having a diameter of 1.18 mm to 1.7 mm, the thickness of the diamond-like carbon layer 30 is preferably 0.1 μm to 10 μm, since this maintains the concave curved shape of the recesses 22 and allows both the material to be bitten into and to be easily peeled off during rolling.

[0025] The diamond-like carbon layer 30 is formed by a plasma CVD method (chemical vapor deposition method) or a PVD method (physical vapor deposition method). For example, when the diamond-like carbon layer 30 is formed by a sputtering method of the PVD method, the diamond-like carbon layer 30 can be formed by a film formation apparatus (see FIG. 5) having the following configuration and under the following film formation conditions.

[0026] 5 is a diagram showing a schematic configuration of a film forming apparatus as an example of a case where a film is formed by a sputtering method of a PVD method. As shown in FIG. 5, the roller core material 20 is arranged in a vacuum chamber 51 so as to be rotatable in the circumferential direction around its rotation axis 20A. This roller core material 20 has already been formed with a debossed surface 21. A long plate-shaped carbon raw material electrode 52 is fixed in the vacuum chamber 51 so as to extend parallel to the rotation axis 20A, face the roller core material 20, and be perpendicular to the radial direction of the roller core material 20. When the roller core material 20 is rotated at a constant speed around the rotation axis 20A by a driving device 63, the carbon raw material electrode 52 faces different angular ranges of the debossed surface 21 in sequence, and when the roller core material 20 rotates once, all of the debossed surfaces 21 face the carbon raw material electrode 52 for the same time.

[0027] The vacuum chamber 51 can be set to a desired vacuum level by an external exhaust device (not shown) through an exhaust port 54. The vacuum chamber 51 is also provided with an argon gas inlet 53 at a position for allowing argon to flow into the space between the roller core 20 and the carbon raw material electrode 52, so that the pressure of the argon gas in the vacuum chamber 51 can be set to a desired value.

[0028] When a pulsed voltage is applied from a pulsed power supply 61 to the carbon raw material electrode 52 with the argon gas in the vacuum chamber 51 at a predetermined pressure, the argon gas is ionized, generating plasma near the carbon raw material electrode 52 toward the roller core material 20. Furthermore, when a predetermined current is applied from a DC power supply 62 to the roller core material 20, the generated plasma causes carbon atoms of the carbon raw material of the carbon raw material electrode 52 to be formed on the debossed surface 21 of the metallic roller core material 20 (sputtering). The driving device 63 controls the rotation speed of the roller core material 20 based on the frequency and pulse width of the pulse voltage from the pulsed power supply 61 while rotating it, so that carbon atoms can be sputtered to a uniform thickness on the debossed surface 21 of the roller core material 20, thereby forming a diamond-like carbon layer 30 on the debossed surface 21 along its shape.

[0029] <Example of film formation conditions> Pressure when vacuum is reached in the vacuum chamber 51: 1.0×10-3 Pa to 5.0×10-2 Pa Distance (shortest distance) between carbon raw material electrode 52 and debossed surface 21: 50 to 200 mm Argon gas flow rate: 30sccm to 300sccm Argon gas pressure: 0.3Pa~4Pa Here, the relationship between the unit sccm and SI units is as follows: 1sccm=1.667×10-8m3 / s

[0030] Pulse voltage frequency: 1kHz~30kHz Pulse voltage (target voltage): 400V~1000V Pulse voltage pulse width: 3μs~400μs Film formation time: 1 to 15 minutes (depending on the application time of the pulse voltage and the set film thickness)

[0031] FIG. 6 is a diagram showing a schematic configuration when the rolling roller 10 according to this embodiment is used as a rolling roller in a continuous rolling process. In the example shown in FIG. 6, a rolling device A1 including a pair of rolling rollers 10, 10 shown in FIG. 1 and FIG. 2 is arranged at the most upstream (rightmost in FIG. 6) in the rolling conveying direction of the dough, and five rolling devices A2, A3, A4, and A5 are arranged in order downstream of this rolling device A1. Further downstream (leftmost in FIG. 6), a cutting device B is arranged. In this example, the dough mass D1 is rolled in the rolling device A1 to become a sheet-shaped dough D2, and this dough D2 is further rolled in the next rolling device A2, and further rolled in the next rolling device A3. Such a rolling process is performed in order in the rolling devices A4, A5, and A6 further downstream. The dough rolled in the most downstream rolling device A6 is cut into noodle strings in the cutting device B and discharged. The noodle strings cut out by cutting device B are subjected to a steaming process and other processes by a device (not shown) depending on the type of noodle, etc.

[0032] The configuration of the rolling devices A2 to A6 can be set arbitrarily depending on factors such as the thickness of the noodles; for example, the rolling devices A2 to A6 may all have the same configuration as the rolling device A1. Furthermore, the depth of the concave shape of the recesses 22 and the opening diameter may be made smaller toward the downstream side, so that the unevenness of the dough surface is reduced and it becomes closer to flat. Furthermore, the distance between the pair of rolling rollers may be made smaller toward the downstream side, so that the thickness of the dough gradually decreases. Furthermore, the number of rolling devices can also be set arbitrarily depending on factors such as the type and thickness of the noodles.

[0033] The method for manufacturing a rolling roller according to this embodiment is a method for rolling out a block of dough for making noodles, which is formed by adding water to an edible powder and kneading the mixture. The target noodles are not particularly limited, but examples include udon, soba, somen, Chinese noodles, instant noodles, gyoza wrappers, wonton wrappers, etc. The edible powder is, for example, wheat flour or buckwheat flour, and the water is added by adding, for example, water, kansui, kneaded water, or salt water depending on the type of target noodles.

[0034] The manufacturing method includes the following steps. (1) A debossing process is performed in which a steel ball with a diameter of 1.18 mm or more and 1.7 mm or less is shot against the surface of the outer peripheral body of the roller core material 20 for a predetermined period of time, for example, 2 minutes, to form a hemispherical recess 22, thereby making the surface of the outer peripheral body of the roller core material 20 into a debossed surface 21 having a surface roughness of 6.3 or more and 100 or less in arithmetic mean roughness. In the shot peening process, recesses 22 having circular opening shapes of various radii are formed at irregular positions on the surface of the outer circumferential barrel portion of the roller core material 20 . (2) A process of placing the roller core material 20, the outer peripheral body surface of which has been made into the debossed surface 21 in the debossing process (1), in a chamber 51 having a predetermined vacuum level, and forming a diamond-like carbon layer 30 on the debossed surface 21, the diamond-like carbon layer 30 conforming to the concave shape of the recess 22 and having a thickness of 0.1 μm to 10 μm.

[0035] In addition, if the shape of the recesses 22 is adjusted by sandblasting or the like after the debossing process (1) above and before the formation of the diamond-like carbon layer 30 (2), the thickness of the diamond-like carbon layer 30 becomes more uniform, thereby further improving the peelability of the material during rolling.

[0036] In the debossing process, the distance, speed, and time of projecting the steel ball are adjusted so that recesses 22 having a semispherical concave shape with a diameter less than or equal to that of the steel ball are formed on the surface of the outer circumferential body of the roller core material 20. By forming the recesses 22 in such a shape, the diamond-like carbon layer 30 can be formed uniformly along the concave shape of the recesses 22, and the time and speed of forming the diamond-like carbon layer 30 are adjusted so that the concave shape of the recesses 22 is not filled up.

[0037] By forming the debossed surface 21 and the diamond-like carbon layer 30 as described above, a large number of relatively rough concave shapes are formed at random positions on the surface of the outer circumferential body of the rolling roller 10, so that the dough D1 sandwiched between the pair of rolling rollers 10 is bitten into the concaves 22 and reliably conveyed, and is rolled into a sheet shape of a desired thickness. Furthermore, due to the action of the diamond-like carbon layer 30 uniformly formed on the debossed surface 21, when the dough leaves the pair of rolling rollers 10, almost no part of the dough remains on the surface of the rolling roller 10, including the concaves 22, and the dough is discharged as a sheet-like dough. Since almost all of the dough that entered the pair of rolling rollers 10 does not remain on the surface of the rolling roller 10, the material attached to the rolling roller 10 does not adhere to the rolled dough later as the rolling process continues, so that dough of a constant quality can be supplied. Furthermore, since little dough remains due to the high releasability, it can be used for a long period of time, and it is possible to reduce costs such as maintenance and replacement with a new rolling roller. Although the present invention has been described with reference to the above-mentioned embodiment, the present invention is not limited to the above-mentioned embodiment, and improvements or modifications can be made within the scope of the present invention or the purpose of the improvements. [Explanation of symbols]

[0038] 10 Roller 10A Rotating shaft 10B Gap 11 Support shaft 20 Roller core 21 Debossed surface 22 Recess 30 Diamond-like carbon layer 40 Support stand 51 Vacuum Chamber 52 Carbon raw material electrodes 53 Argon gas inlet 54 Exhaust port 61 Pulse power supply 62 DC power supply 63 Drive unit A1, A2, A3, A4, A5, A6 rolling equipment B. Cutting device D1 Fabric Spirit D2 Fabric

Claims

1. A method for manufacturing a rolling roller for rolling a block of dough for making noodles formed by adding water to edible powder and kneading the dough, comprising the steps of: a debossing process in which a steel ball having a diameter of 1.18 mm to 1.7 mm is shot against the surface of an outer circumferential body of a metallic roller core material having an overall cylindrical shape with support shafts at both ends to form a hemispherical recess, thereby forming a debossed surface having an arithmetic mean roughness of 6.3 to 100 on the surface of the outer circumferential body of the roller core material; a step of placing the roller core material, the outer peripheral body portion of which has been debossed in the debossing step, in a chamber having a predetermined vacuum level, and forming a diamond-like carbon layer on the debossed surface in accordance with the concave shape of the recesses; Equipped with A method for manufacturing a rolling roller for rolling dough for producing noodles, wherein the diamond-like carbon layer has a thickness of 0.1 μm or more and 10 μm or less.

2. The method for manufacturing a rolling roller according to claim 1, wherein the roller core material is held rotatably in the circumferential direction within the chamber, and a diamond-like carbon layer is formed on the entire surface of the outer peripheral body portion on which the embossed surface is formed.

3. A rolling roller for rolling a block of dough for making noodles, which is formed by adding water to edible powder and kneading the dough, into a sheet-like noodle strip having a predetermined thickness, comprising: A roller core made of metal and having a cylindrical shape with support shafts at both ends is provided. The surface of the outer peripheral body of the roller core is formed with a hemispherical recess to form a debossed surface having an arithmetic mean roughness of 6.3 or more and 100 or less, The rolling roller is characterized in that the rolling roller has a diamond-like carbon layer formed on the debossed surface along the concave shapes of the recesses.

4. The recess has a hemispherical shape with a diameter of 1.18 mm or more and 1.7 mm or less, 4. The pressure roller according to claim 3, wherein the diamond-like carbon layer has a thickness of 0.1 μm or more and 10 μm or less.

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