Wrinkling scraper and wrinkling device

Abstract

The utility model discloses a wrinkling scraper and a wrinkling device, and belongs to the technical field of toilet paper production cutters. The cutter comprises a base body and a working face formed at the top of the base body, a blade is formed at the junction of a cylinder face of the base body and the working face, grooves distributed at intervals are formed in the working face in the length direction of the working face, and the grooves penetrate through the width direction of the working face. The width of the top of the groove is controlled within the range of 0.08 mm to 0.40 mm, the opening depth of the groove is controlled within the range of 0.06 mm to 0.35 mm, the width of the top of the groove is gradually reduced, and the gradually-reducing direction of the top of the groove is the direction away from the cutting edge. Through the arrangement of the grooves, crisscross wrinkles can be simultaneously formed on a paper web, so that the water / oil absorption performance of the wrinkling paper is greatly improved. Meanwhile, the depth and the width of the groove are further optimally designed, so that the phenomenon that normal paper scraping of the blade is affected due to the existence of the groove can be effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to toilet paper production tool technical field more specifically, relate to a kind of creping doctor and creping device. BACKGROUND

[0002] In the manufacturing process of creped paper, the softness, bulkiness, stretchability and absorbency of tissue paper are generally achieved through dryer drying and creping doctor. One of the most common methods is to use a creping doctor to peel off the paper web attached to the surface of the dryer, and to use the relative speed between the creping doctor and the paper web to generate a violent collision when they meet, thereby destroying the fiber bonds within the paper web. This method is known in the industry as creping. The creped paper not only has a soft feel, but also has improved bulkiness. As the bulkiness increases, the liquid / oil storage space of the creped paper also increases, thereby improving the liquid / oil absorption and storage performance of the creped paper.

[0003] Therefore, it can be seen that the creping doctor plays an important role in the processing of creped paper. There are a large number of technical improvements for creping doctors in the prior art, such as CN110409213A, CN106182906A, CN217810226U, etc. However, since the impact surface of the existing technology is basically a flat surface, although it can achieve a certain creping effect, the bulkiness of the creped paper is limited, thus limiting the water / oil absorption performance of the creped paper, and thus failing to meet the needs of kitchen paper, handkerchiefs and other paper that requires high water / oil absorption performance. Therefore, it is of great practical significance to design a creping doctor that can process paper with better water / oil absorption performance.

[0004] In view of the above-mentioned problems, the existing scheme also proposes a related technical scheme for a sawtooth doctor. That is, by designing the impact surface of the creping doctor as a sawtooth shape, the creping effect is improved.

[0005] For example, in the patent US3163575A, a toothed or sawtooth-shaped doctor is used. Unlike the fine wrinkles produced by traditional flat doctors, the sawtooth doctor can form larger and irregular raised stripes, thereby making the sheet have a greater depth.

[0006] In the patent CN215164161U, a creping doctor, a creping device and paper are disclosed. In this application, the continuous paper web can produce multiple micro-creases at the location of the creping part. As the paper web continues to move on the working surface, the multiple micro-creases accumulate along the direction perpendicular to the creped paper surface until the Yankee dryer surface pushes out the multiple accumulated micro-creases, forming large creases. This is beneficial to the formation of a three-dimensional creping structure during the creping process, improving the bulkiness of the creped paper, and thus improving the liquid / oil absorption and storage performance.

[0007] In the above-mentioned applications, the sawtooth doctor technology is used to improve the creping effect, but since the folds on the paper web extend along the width direction of the paper web, no folds are formed in the length direction of the paper web. Therefore, the liquid / oil absorption performance still needs to be further improved. Content of the utility model

[0008] 1. Problem to be solved

[0009] In view of the problem that the water / oil absorption performance of the creped paper processed by the existing creping doctor is limited and cannot well meet the demand of kitchen paper, handkerchief paper and other paper requiring high water / oil absorption performance, the utility model provides a creping doctor, through the longitudinally arranged grooves, the transverse and longitudinal staggered creping strips can be formed on the paper web, so that the water / oil absorption performance of the creped paper is greatly improved. Meanwhile, through the control of the groove width and depth, the paper web can be effectively prevented from being scratched, and the formation of the creping strips is also facilitated.

[0010] 2. Technical scheme

[0011] In order to solve the above-mentioned problem, the technical scheme adopted by the utility model is as follows:

[0012] The utility model discloses a creping doctor which comprises a base body and a working surface formed on the top of the base body, a cutting edge is formed at the junction between the cylinder surface of the base body and the working surface, a plurality of grooves are arranged on the working surface in a length direction of the working surface, and the grooves are arranged in a width direction penetrating through the working surface.

[0013] The bottom width of the groove is not greater than the top width, the top width is controlled in the range of 0.08-0.40mm, and the top width is arranged in a tapered manner, one end close to the cutting edge is a large notch end, the other end is a small notch end, and the difference between the widths of the two ends is 0.08-0.28mm.

[0014] The opening depth of the groove is controlled in the range of 0.06-0.35mm.

[0015] In some embodiments, the width of the large notch end is 0.12-0.35mm, the width of the small notch end is 0.09-0.20mm, and the difference between the widths of the two ends is 0.10-0.15mm.

[0016] In some embodiments, the opening depth of the groove is arranged in a tapered manner along the width direction of the working surface, the tapering direction is consistent with the tapering direction of the top width, and the difference between the depths of the two ends is controlled in the range of 0.04-0.14mm.

[0017] In some embodiments, the depth of the large notch end is 0.11-0.32mm, the depth of the small notch end is 0.07-0.18mm, and the width difference between the two is 0.08-0.12mm.

[0018] In some embodiments, the distribution density of the grooves along the length direction of the working surface is 8-12 / cm.

[0019] In some embodiments, the grooves are V-shaped as a whole, and the depth-width ratio of the V-shaped groove is 0.6-1.2.

[0020] In some embodiments, the upper part of the base body near the cylinder surface forms an inclined friction surface, and the intersection between the friction surface and the working surface forms the cutting edge.

[0021] The upper part of the back cylinder surface of the base body and the working surface form a polishing surface, and the polishing surface as a whole is inclined towards the friction surface side.

[0022] In some embodiments, the angle α1 between the working surface and the horizontal plane is 0-10°; the angle α2 between the friction surface and the vertical plane is 0-8°; and the angle α3 between the polishing surface and the vertical plane is 0-12°.

[0023] In some embodiments, the working surface and the grooves thereon are sprayed with a wear-resistant layer; wherein the hardness of the wear-resistant layer is HV900-1300; and the thickness is 20μm-100μm.

[0024] In some embodiments, the grooves are formed by a gear hobbing process, and the hardness of the base body is HRC30-65.

[0025] The utility model discloses a creping doctor blade, including base body and the working surface formed at the top of base body, the intersection between the cylinder surface of base body and working surface forms cutting edge, and the working surface is equipped with groove along its length direction interval, wherein,

[0026] The bottom width of the groove is not more than the top width, the top width and depth of the groove are both 0.1-0.5mm, and the depth-width ratio is controlled within the range of 0.8-1.1.

[0027] The distribution density of the groove along the length direction of the working surface is 5-14 / cm.

[0028] In some embodiments, the top width of the groove is tapered, and the taper direction is away from the cutting edge; wherein the width near the cutting edge end is 0.10-0.36mm, and the width of the other end is 0.08-0.20mm; and the width difference between the two ends is controlled within the range of 0.10-0.20mm.

[0029] In some embodiments, the depth of the groove is tapered along the width direction of the working surface, and the tapering direction is away from the blade; wherein the depth near one end of the blade is 0.12-0.30mm, and the depth near the other end is 0.06-0.16mm; and the depth difference between the two ends is controlled within the range of 0.05-0.15mm.

[0030] The utility model discloses a kind of creping devices, including tool rest and the creping doctor of setting on tool rest, the working surface of the creping doctor is equipped with the groove of interval distribution along its length direction, the groove is set in the width direction of penetrating working surface;Wherein,

[0031] The bottom width of the groove is not more than the top width, the top width is controlled within the range of 0.08-0.35mm, and the top width is tapered, one end near the blade is large notch end, the other end is small notch end, and the width difference between the two ends is 0.08-0.28mm;

[0032] The depth of the groove is controlled within the range of 0.06-0.30mm, and the depth is tapered along the width direction of the working surface, and the tapering direction is consistent with the tapering direction of the top width, and the depth difference between the two ends is controlled within the range of 0.04-0.14mm.

[0033] 3, beneficial effects

[0034] Compared with prior art, the utility model has the beneficial effects that:

[0035] (1) the creping doctor of the utility model, by setting the groove of penetrating the width of working surface on working surface, first fold and second fold of horizontal and vertical staggered can be formed on paper web;Compared with traditional creping doctor, only fold can be formed in single direction of paper web;Horizontal and vertical staggered fold can greatly improve the creping effect of paper web, and then be conducive to enhancing the water / oil absorption performance of creped paper. At the same time, by strictly controlling the depth and width of the groove, the problem that the blade is easy to damage paper due to the existence of the groove can be effectively avoided.

[0036] (2) the creping doctor of the utility model, by designing the top width of the groove as tapered type, and controlling the tapering direction and tapering degree, the damage of second fold formed by paper web tension in horizontal direction can be effectively overcome, thereby being conducive to the formation of second fold. At the same time, since the friction resistance at the groove is increased compared with plane during the forward movement of paper web, the accumulation time is prolonged, and it is also conducive to the formation of first fold. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 It is the structure diagram of the creping doctor of the utility model;

[0038] Figure 2 is Figure 1 a partial enlarged view at A in the middle;

[0039] Figure 3 is a plan view of a creping doctor of the utility model;

[0040] Figure 4 is Figure 3 a partial enlarged view at B in the middle;

[0041] Figure 5 is a side view of a creping doctor of the utility model;

[0042] Figure 6 is Figure 5 a partial enlarged view at C in the middle;

[0043] Figure 7 is a front view of a creping doctor of the utility model;

[0044] Figure 8 is Figure 7 a partial enlarged view at D in the middle.

[0045] In the figure: 100, base body; 110, working surface; 120, groove; 130, doctor blade; 140, friction surface; 150, polishing surface. DETAILED DESCRIPTION

[0046] In order to further understand the content of the utility model, the utility model is described in detail in combination with the drawings.

[0047] In the description of the utility model, it should be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0048] The existing creped paper towel has limited water / oil absorption performance, thus failing to meet the demand of kitchen paper, hand wiping paper and other paper requiring high water absorption performance. The prior art proposes to increase the creping thickness by setting recesses on the creping knife to improve the water / oil absorption performance of the paper towel. However, the recesses in the prior art are arranged along the length direction of the creping knife, which can effectively improve the creping effect of the paper web in the length direction, but fails to effectively improve the creping effect of the paper web in the width direction. Therefore, the creped paper processed by the knife still has certain improvement space in water / oil absorption performance.

[0049] To solve the above problems, the optimal solution is to also set recesses in the width direction of the creping knife to simultaneously crepe the paper web in the length and width directions. However, the existence of the recesses in the width direction causes the opening of the recesses to scratch or even tear the paper web. Thus, the solution cannot be applied in actual production.

[0050] The utility model provides a kind of creping doctor, its main point is in, under the premise that not influencing creping doctor normal paper scraping, it can form with horizontal and vertical staggered creping lines in creped paper product, to maximum possible improve the creping effect of paper web, to further improve the water absorption, oil absorption performance of creped paper product.

[0051] The utility model is further described below in combination with specific embodiments.

[0052] Reference Figures 1-2 As shown in the figure, a creping doctor in the embodiment includes a base body 100 and a working surface 110 formed on the top of the base body 100, and a knife edge 130 is formed at the junction between the cylinder surface of the base body 100 and the working surface 110. The knife edge 130 contacts the cylinder surface to assist the dried paper web to peel off the cylinder surface. The working surface 110 is used to collide with the peeled paper web and form creases.

[0053] The working surface 110 is provided with recesses 120 distributed at intervals along the length direction thereof, and the recesses 120 are arranged in the width direction of the working surface 110. It should be noted that, in the embodiment, the X direction in the formula (1) is defined as the length direction of the doctor; the Y direction is defined as the width direction of the doctor, i.e., the thickness direction; and the Z direction is defined as the height direction of the doctor. Meanwhile, the conveying direction of the paper web is defined as the length direction of the paper web, and the direction extending along the length direction of the doctor is defined as the width direction of the paper web. Figure 1

[0054] ​Compared with the traditional creping doctor which can only form the crepe in a single direction of the paper web, the creping doctor of the embodiment can form the horizontal and vertical staggered crepe on the paper web at the same time through the arrangement of the groove 120, thereby greatly improving the creping effect of the paper web and being beneficial to enhancing the water / oil absorption performance of the creped paper.

[0055] It can be understood that the presence of the groove 120 will adversely affect the normal doctoring operation of the paper web and easily cause the paper web to be scratched or even torn. The main parameters affecting the doctoring scratch of the paper web include the depth, width and spacing of the groove 120, etc. Meanwhile, these parameters also have a great influence on the creping effect of the paper web. Therefore, the above parameters are further limited in the embodiment to ensure that the best creping effect can be achieved under the premise of normal doctoring.

[0056] Specifically, as shown in Figure 3 , Figure 4 In the embodiment, the bottom width of the groove 120 is not greater than the top width, and the top width is controlled in the range of 0.08-0.40mm, for example, 0.10mm, 0.25mm, 0.35mm, etc. The opening depth of the groove 120 is controlled in the range of 0.06-0.35mm, for example, 0.1mm, 0.2mm, 0.3mm, etc. It is not difficult to understand that the above width and depth control need to meet the conditions at the same time to achieve the best effect. That is to say, in the embodiment, through the common control of the top width and opening depth of the groove 120, the horizontal and vertical staggered crepe can be formed on the paper web without scratching the paper web, and the water / oil absorption performance of the creped paper is improved. Of course, in order to help the paper web to smoothly separate from the cylinder, a release agent can be coated on the surface of the cylinder. The specific principle and application of the release agent as a mature prior art are widely known to those skilled in the art, and will not be repeated here.

[0057] In this embodiment, the formation of the first crepe in the length direction of the creped paper is similar to the working principle of the conventional doctor blade, which is formed by the accumulation of the paper web on the working surface 110 along its conveying direction. The difference is that, due to the presence of the grooves 120 in this embodiment, the friction between the paper web and the working surface 110 is increased, thereby prolonging the accumulation time and facilitating the formation of the first crepe. The formation of the second crepe in the width direction mainly relies on the filling of the paper web in the grooves 120; that is, the shape and size of a single second crepe are determined by the width and depth of the groove 120, and the overall distribution effect of the second crepe in the width direction of the paper web is determined by the pitch of adjacent grooves 120. If the pitch of adjacent grooves 120 is too large, the second crepe is relatively sparse, which is not conducive to the improvement of the distribution density of the second crepe, thereby affecting the final water / oil absorption performance of the creped paper. If the pitch of adjacent grooves 120 is too small, it is theoretically beneficial to improve the distribution density of the second crepe. However, it is found in actual operation that the excessive distribution of the grooves 120 will result in too many notches on the blade edge 130, thereby greatly increasing the risk of scratching the paper web. Therefore, in this embodiment, the distribution density of the grooves 120 in the length direction of the working surface 110 is controlled at 5-14 / cm, so as to ensure that the risk of scratching the paper web is reduced while maintaining a high distribution density of the second crepe. Preferably, the distribution density is 8-12 / cm, for example, 9 / cm, 10 / cm, 11 / cm, etc.

[0058] As an optional embodiment of the groove 120, the groove 120 as a whole is V-shaped, and its cross section can be approximately regarded as a triangle. In this embodiment, on the basis of controlling the depth and width of the groove 120, the depth-width ratio of the groove 120 is further controlled at 0.6-1.2, for example, 0.7, 0.9, 1.0, etc., and preferably at 0.8-1.1. By controlling the depth, width and depth-width ratio of the groove 120, the overall shape of the groove 120 can be further determined to better balance the relationship between the creping effect and the prevention of scratching the paper web. It should be noted that the depth-width ratio here is the ratio of the top width to the opening depth of the groove 120.

[0059] As another optional embodiment of the groove 120 in this embodiment, as shown in FIG. 4, the top width of the groove 120 is tapered, and the tapering direction is away from the blade edge 130. It should be noted that when the groove 120 is tapered, the top width, depth and depth-width ratio at each cross section of the groove 120 need to meet the above requirements. At the same time, for the convenience of the following description, the area where the paper web starts to contact the working surface 110 is defined as the M area, and the area between the M area and the blade edge 130 is defined as the P area.

[0060] Specifically, the groove 120 has a large notch end close to the blade 130, and a small notch end away from the blade 130. The width L2 of the large notch end is controlled within a range of 0.12-0.35mm, for example, 0.14mm, 0.22mm, 0.33mm, etc. The width L1 of the small notch end is controlled within a range of 0.09-0.20mm, for example, 0.11mm, 0.14mm, 0.17mm, etc. The advantage of such design is that, when the paper web contacts the M area of the working surface 110 and accumulates in the P area to form the first creases, part of the paper web fills in the groove 120 to form the second creases. As the paper web continuously moves forward in the P area (the forward direction is close to the M area), the paper web filled in the groove 120 is compressed, and the compression process can effectively overcome the damage of the already formed second creases by the tension of the paper web in the transverse direction, thereby facilitating the formation of the second creases. At the same time, the frictional resistance of the paper web at the groove 120 during the forward movement is increased compared with the flat surface, thereby prolonging the accumulation time and also facilitating the formation of the first creases.

[0061] It should be noted that the thickness of the creping doctor blade is generally thin, generally within a range of 0.6-1.5mm. Although the size and spacing of the groove 120 are limited to ensure the creping effect, if the taper of the groove 120 is too flat, the tapering effect cannot be achieved. However, if the taper is too large, the actual width of the M area will be greatly reduced, which is not conducive to the formation of the creases. Therefore, in the embodiment, the width difference between the large and small notch ends is controlled within a range of 0.08-0.28mm, for example, 0.11mm, 0.17mm, 0.24mm, etc., and preferably within a range of 0.10-0.15mm.

[0062] Of course, the tapering direction of the groove 120 can also be opposite to the above, i.e., the end close to the blade 130 is the small notch end, and the end away from the blade 130 is the large notch end. Through the above analysis, such design is obviously not conducive to the formation of the second creases. However, such design makes the notch left by the groove 120 on the blade smaller, which has certain advantages in preventing the paper web from being scratched.

[0063] Further, with reference to Figure 7 , Figure 8As shown, the opening depth of the groove 120 is also tapered, and the tapering direction is also away from the blade 130. That is, the end close to the blade 130 is the large notch end, and the depth H1 is controlled at 0.11-0.32mm, for example, 0.15mm, 0.24mm, 0.29mm, etc.; the end away from the blade 130 is the small notch end, and the depth H2 is controlled at 0.07-0.18mm, for example, 0.08mm, 0.13mm, 0.17mm, etc. At the same time, the depth difference of the two ends is controlled within the range of 0.04-0.14mm, for example, 0.07mm, 0.09mm, 0.13mm, etc., preferably 0.08-0.12mm. By tapering the depth of the groove 120 and controlling the tapering degree of the depth, the influence of the second wrinkle on the paper web in the transverse direction during the extrusion forming process can also be offset, thereby facilitating the formation of the second wrinkle.

[0064] In this embodiment, during the process of the paper web colliding with the working surface 110 to wrinkle, the fiber bonds of the paper web are inevitably destroyed, and some debris will be generated. These debris will gradually fill in the groove 120, thereby changing the actual wrinkle width and depth of the groove 120, and further affecting the final wrinkle effect of the paper web. In this embodiment, the groove 120 is tapered in width and depth, and the tapering direction is consistent with the overall movement direction of the paper web. During the movement of the paper web, the debris in the groove 120 is more easily carried to the area away from the blade 130, thereby facilitating the extension of the service time of the scraper. Of course, it is not possible to completely avoid the filling of debris in the groove 120. After working for a certain period of time, the debris in the groove 120 still needs to be cleaned to ensure the wrinkle effect. However, the dual tapering of the groove width and depth is also beneficial to the cleaning operation of the debris.

[0065] Reference Figure 5 、 Figure 6 As shown, the working surface 110 of the wrinkle scraper in this embodiment is inclined as a whole, and the inclination angle α1 is 0-10°, for example, 3°, 6°, 8°, etc., to ensure that the first wrinkle has a suitable thickness, thereby maintaining the good hand feeling of the wrinkled paper. At the same time, in order to further improve the wear resistance of the working surface 110 and prolong the service life, a wear-resistant layer (not shown in the figure) can be sprayed in the working surface 110 and the groove 120 thereon. The material of the wear-resistant layer is one or a combination of several of metal oxides, ceramic materials, silicates, carbides, borides, and nitrides, for example, chromium sesquioxide and titanium dioxide materials, which are disclosed in the prior art and will not be described here.

[0066] Preferably, the thickness of the wear-resistant layer is 20-100 μm, for example, 20 μm, 60 μm, 80 μm, etc. The thickness is selected to meet the requirements of wear resistance and not to cause too much interference with the size of the groove 120. The hardness of the wear-resistant layer is HV 900-1300, for example, 920 HV, 1000 HV, 1100 HV, 1200 HV, etc. Meanwhile, it should be noted that the width and depth of the groove mentioned in the above embodiments refer to the size after the wear-resistant layer is sprayed.

[0067] In the embodiment, the groove 120 has a small width, and is preferably formed by a gear rolling process. Compared with the shot blasting / sand blasting process, the gear rolling process can more accurately control the size of the groove 120 to ensure the consistency of the second wrinkle shape. Meanwhile, the gear rolling process can make the working surface 110 maintain good surface quality and reduce the risk of scratching the paper web.

[0068] In addition, since the length of the doctor blade is long, it needs sufficient lateral hardness support, otherwise, it may be bent due to gravity, etc., and the thickness of the processed paper web is not uniform. However, if the hardness is too large, it is not conducive to the processing and forming of the groove 120. Therefore, in the embodiment, the hardness of the base body 100 is controlled within the range of HRC 30-65, preferably HRC 40-55, for example, 42 HRC, 45 HRC, 47 HRC, etc.

[0069] In some embodiments, the upper part of the base body 100 close to the cylinder surface forms a friction surface 140, and the junction between the friction surface 140 and the working surface 110 forms the blade edge 130. Meanwhile, the upper end of the friction surface 140 deviates away from the drying cylinder, and the deviation angle α2 is 0-8°, for example, 2°, 5°, 7°, etc., to change the angle close to the cylinder.

[0070] In other embodiments, the upper part of the base body 100 away from the cylinder surface forms a polishing surface 150 between the working surface 110, and the upper end of the polishing surface 150 is inclined toward the friction surface 140 as a whole, and the inclination angle α3 is 0-12°, for example, 1°, 4°, 9°, etc. The polishing surface 150 is actually formed after the metal burrs extruded to the side away from the cylinder are polished after the groove 120 is formed by rolling, thereby effectively avoiding scratching the paper web.

[0071] The embodiment also provides a processing process of the creping doctor blade,

[0072] First, a strip steel meeting the basic size requirements is selected as the base body 100, and the hardness of the strip steel is preferably HRC 25-70;

[0073] Then, the grooves 120 are formed on the top of the base body 100 by a rolling process and are distributed along the length direction of the base body 100; at this time, the sizes of the grooves 120 are basically consistent;

[0074] Then, the area where the recess 120 is formed on the base 100 is subjected to beveling processing to form an inclined working surface 110; at the same time, the recess 120 with the depth and width gradually decreasing is formed on the working surface 110, and the tapering direction is away from the cylinder surface of the base 100;

[0075] Then, the recess 120 and its periphery are subjected to polishing processing to remove metal burrs; at the same time, the friction surface 140 is formed on the upper part of the cylinder surface of the base 100, and the polishing surface 150 is formed on the upper part of the back cylinder surface of the base 100;

[0076] Finally, the surface of the working surface 110, including the inside of the recess 120, is subjected to spraying process to form a wear-resistant layer.

[0077] In addition, the embodiment also provides a creping device, which comprises a knife holder and a creping doctor provided on the knife holder. The working surface 110 of the creping doctor is provided with recesses 120 in the length direction of the working surface 110, and the recesses 120 are arranged in the width direction of the working surface 110. The bottom width of the recess 120 is not greater than the top width, the top width is controlled in the range of 0.08-0.35 mm, and the top width is tapered, the large slot end is close to the blade 130, and the small slot end is far away from the blade 130, and the difference between the widths of the two ends is 0.08-0.28 mm. The opening depth of the recess 120 is controlled in the range of 0.06-0.30 mm, and the opening depth is tapered in the width direction of the working surface 110, the tapering direction is consistent with the tapering direction of the top width, and the difference between the depths of the two ends is controlled in the range of 0.04-0.14 mm.

[0078] The above describes the utility model and its embodiments in a schematic manner, which is not restrictive, and the drawings only show one of the embodiments of the utility model, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the above description, without departing from the creative purpose of the utility model, similar structural modes and embodiments can be designed without creativity, which should belong to the protection scope of the utility model.

Claims

1. A wrinkling scraper, comprising a base (100) and a working surface (110) formed on the top of the base (100), wherein a cutting edge (130) is formed at the junction between the cylinder side of the base (100) and the working surface (110), characterized in that: The working surface (110) is provided with grooves (120) spaced apart along its length, the grooves (120) being arranged in the width direction penetrating the working surface (110); wherein, The bottom width of the groove (120) is not greater than the top width. The top width is controlled within the range of 0.08-0.40mm. The top width is gradually narrowed, with a large groove end near the blade (130) and a small groove end at the other end. The difference in width between the two ends is 0.08-0.28mm. The depth of the groove (120) is controlled within the range of 0.06-0.35mm.

2. The wrinkling scraper according to claim 1, characterized in that: The width of the large slot end is 0.12-0.35mm, the width of the small slot end is 0.09-0.20mm, and the difference between the two widths is 0.10-0.15mm.

3. A wrinkling scraper according to claim 1 or 2, characterized in that: The groove (120) is set to gradually decrease in depth along the width direction of the working surface (110), and the decreasing direction is consistent with the decreasing direction of the top width, and the difference in depth between the two ends is controlled within the range of 0.04-0.14mm.

4. A wrinkling scraper according to claim 3, characterized in that: The depth of the large slot end is 0.11-0.32mm, the depth of the small slot end is 0.07-0.18mm, and the width difference between the two is 0.08-0.12mm.

5. A wrinkling scraper according to claim 3, characterized in that: The distribution density of the grooves (120) along the length of the working surface (110) is 8-12 per cm.

6. A wrinkling scraper according to claim 5, characterized in that: The groove (120) is V-shaped in general, and the depth-to-width ratio of the V-shaped groove is 0.6-1.

2.

7. A wrinkling scraper according to claim 1, characterized in that: An inclined friction surface (140) is formed on the upper part of the cylinder side of the base (100), and the blade (130) is formed at the junction between the friction surface (140) and the working surface (110). A grinding surface (150) is formed between the upper part of the back cylinder surface of the base (100) and the working surface (110), and the grinding surface (150) is inclined towards the friction surface (140) as a whole.

8. A wrinkling scraper according to claim 7, characterized in that: The angle α1 between the working surface (110) and the horizontal plane is 0-10°; the angle α2 between the friction surface (140) and the vertical plane is 0-8°; and the angle α3 between the grinding surface (150) and the vertical plane is 0-12°.

9. A wrinkling scraper according to claim 7, characterized in that: The working surface (110) and the groove (120) thereon are coated with a wear-resistant layer; wherein the hardness of the wear-resistant layer is HV900-1300 and the thickness is 20μm-100μm.

10. A wrinkling scraper, comprising a base (100) and a working surface (110) formed on the top of the base (100), wherein a cutting edge (130) is formed at the junction between the cylinder side of the base (100) and the working surface (110), characterized in that: The working surface (110) is provided with grooves (120) spaced apart along its length; wherein, The bottom width of the groove (120) is not greater than the top width. The top width and depth of the groove (120) are both 0.1-0.5mm, and the depth-to-width ratio is controlled within the range of 0.8-1.

1. The distribution density of the grooves (120) along the length of the working surface (110) is 5-14 per cm.

11. A wrinkling scraper according to claim 10, characterized in that: The top width of the groove (120) is tapered, and the tapering direction is away from the blade (130); the width at one end near the blade (130) is 0.10-0.36mm, and the width at the other end is 0.08-0.20mm; and the width difference between the two ends is controlled within the range of 0.10-0.20mm.

12. A wrinkling scraper according to claim 11, characterized in that: The groove (120) is set to gradually decrease in depth along the width direction of the working surface (110), and the direction of the decrease is away from the cutting edge (130); wherein, the depth at one end near the cutting edge (130) is 0.12-0.30mm, and the depth at the other end is 0.06-0.16mm; and the depth difference between the two ends is controlled within the range of 0.05-0.15mm.

13. A wrinkling device, comprising a blade holder and a wrinkling scraper disposed on the blade holder, characterized in that, The wrinkling scraper has grooves (120) spaced apart along its length on its working surface (110), the grooves (120) extending through the width of the working surface (110); wherein, The bottom width of the groove (120) is not greater than the top width. The top width is controlled within the range of 0.08-0.35mm. The top width is gradually narrowed, with one end near the blade (130) being the large groove end and the other end being the small groove end. The difference in width between the two ends is 0.08-0.28mm. The depth of the groove (120) is controlled within the range of 0.06-0.30mm. The depth is gradually reduced along the width direction of the working surface (110), and the direction of the reduction is consistent with the direction of the reduction of the top width. The difference between the depths at both ends is controlled within the range of 0.04-0.14mm.

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