CN217703512U

CN217703512U - Static blade

Info

Publication number: CN217703512U
Application number: CN202221861797.0U
Authority: CN
Inventors: 不公告发明人
Original assignee: ZHEJIANG HAISHUN ELECTRICAL CO Ltd
Current assignee: ZHEJIANG HAISHUN ELECTRICAL CO Ltd
Priority date: 2022-07-18
Filing date: 2022-07-18
Publication date: 2022-11-01
Anticipated expiration: 2032-07-18

Abstract

The utility model relates to a stationary blade, its characterized in that is equipped with the sword tooth group that a plurality of cutting tooth is constituteed at least one side edge of substrate, is equipped with the unloading groove at the up end of substrate and/or lower terminal surface and makes each cutting tooth thickness be less than substrate thickness respectively in the sword tooth group to the prong department up end and/or the lower terminal surface shape of each cutting tooth form the tooth protruding in the sword tooth group. The beneficial effects of the utility model are that set up at the up end of substrate and/or lower terminal surface and remove the silo, utilize to remove the silo and reduce the thickness that cuts the tooth and promote the pruning effect of hair. Secondly, it is protruding to go the silo and can also cut the prong up end and/or the lower terminal surface formation tooth of tooth, utilizes the tooth protruding to play the guard action to skin, avoids each cutting prong too sharp and fish tail skin, promotes the safety in utilization of quiet blade to the effect of comb can also be played to the tooth is protruding, and amazing skin nerve accelerates skin blood circulation and blood oxygen supply, thereby produces comparatively comfortable skin sense, promotes the use comfort level of quiet blade.

Description

Static blade

Technical Field

The utility model relates to a hair clipper blade, more specifically the static blade that says so relates to, belong to hair clipper's important part.

Background

The stationary blade is primarily implemented by means of several side-by-side spaced cutter teeth arranged at the edge of the razor blade when cutting hair. In order to ensure the flatness and the working strength of the cutting surface of the static blade and avoid the distortion in the production and use processes, the thickness of the conventional plate of the static blade is basically more than 0.3 mm. Although the thicker plate can prevent the static blade from being distorted and deformed during production and use and ensure the flatness and working strength of the cutting surface of the static blade, in the hair trimming process, the thickness of each cutting tooth is the same as that of the plate, the residual length of the hair roots is longer under the influence of the thickness of the plate, so that the hair cannot be shaved cleanly, and the use requirements of users cannot be met.

SUMMERY OF THE UTILITY MODEL

To solve the above technical problems; the utility model provides a static blade, through the manufacturing method of the static blade of innovation, not only can guarantee the working strength of static blade when producing the use, simultaneously, still can make the thickness of each cutting tooth be less than static blade thickness, guarantee the hair effect of repairing of hair pruning in-process.

For solving above technical problem, the utility model discloses the technical scheme who takes is a stationary blade, including the substrate, be equipped with the sword tooth group that a plurality of cutting tooth is constituteed at least one side edge of substrate, be equipped with at the up end of substrate and/or terminal surface down and remove the silo and make each cutting tooth thickness be less than substrate thickness respectively in the sword tooth group to it is protruding that the prong department up end and/or the lower terminal surface of each cutting tooth form the tooth in the sword tooth group.

Preferably, the tooth projection height is less than or equal to the substrate thickness.

Preferably, the tooth convex comprises an upper tooth convex and a lower tooth convex, the upper tooth convex and the lower tooth convex are respectively arranged on the upper end surface and the lower end surface of the tooth tip of each cutting tooth, and joints of the upper tooth convex and the lower tooth convex and the cutting teeth are respectively in smooth transition.

Preferably, the upper tooth projection width is smaller than the lower tooth projection width as viewed in the tooth tip projection direction of each cutting tooth.

Preferably, the outer surface of the substrate is an arc-shaped surface when viewed in a projection direction from either end of the substrate.

Preferably, the thickness of each cutting tooth in the cutter tooth group is less than the thickness of the substrate and is greater than or equal to 0.08mm.

Preferably, the stripping channel depth is less than the substrate thickness.

Preferably, the edges of two opposite sides of the substrate are respectively provided with a cutter tooth group, and the length of the cutter tooth group is smaller than that of the substrate, so that the distance between two ends of the cutter tooth group and the edges of two ends of the substrate is 3 mm-10 mm.

Preferably, the material removing groove comprises an upper material removing groove and a lower material removing groove, the upper material removing groove is arranged on the outer surface of the substrate, so that upper tooth protrusions are formed on the upper end faces of the tooth tips of the cutting teeth in the cutter tooth group, the lower material removing groove is arranged on the inner surface of the substrate, so that the thickness of each cutting tooth in the cutter tooth group is smaller than that of the substrate, and lower tooth protrusions are formed on the lower end faces of the tooth tips of the cutting teeth.

The beneficial effects of the utility model are that the upper end face and/or the lower terminal surface of substrate get rid of respectively cut the tooth up end and/or the terminal surface sets up and removes the silo in the sword tooth group, guarantee the working strength of substrate in production or use, when promoting the working property of quiet blade, can also utilize and remove the silo and reduce the thickness of cutting the tooth, utilize thinner cutting tooth to promote the pruning effect of hair. Secondly, it is protruding that the tooth point up end and/or the lower terminal surface that go the silo and also make each cutting tooth in the sword tooth group form the tooth, just can utilize the tooth to be protruding to play the guard action to skin when using, avoid each cutting tooth point too sharp and fish tail skin, promote the safety in utilization of quiet blade, and when quiet blade laminating skin, the tooth of each cutting tooth point department in the sword tooth group is protruding can also to play the effect of comb, amazing cranial nerve, head skin blood circulation and blood oxygen supply accelerate, thereby produce comparatively comfortable skin and feel, promote the use comfort of quiet blade.

Drawings

FIG. 1 shows an embodiment of the present invention an elevation view of a stationary blade

FIG. 2 is a perspective view of a stationary blade according to an embodiment of the present invention

FIG. 3 isbase:Sub>A sectional view of the structure at A-A in FIG. 1

FIG. 4 is a side view of a stationary blade according to an embodiment of the present invention

Fig. 5 is a cross-sectional structure diagram of a second embodiment of a stationary blade according to an embodiment of the present invention

Fig. 6 is a cross-sectional structure diagram of a third embodiment of a stationary blade according to an embodiment of the present invention

Detailed Description

The following is combined with the attached drawings to the utility model the embodiments are further illustrated:

as shown in fig. 1-6, the utility model relates to a stationary blade, including substrate 1, be equipped with the sword tooth group 2 that a plurality of cutting tooth 21 is constituteed at least one side edge of substrate 1, be equipped with at the up end of substrate 1 and/or the lower terminal surface and remove silo 3 and make in sword tooth group 2 each cutting tooth thickness T3 be less than substrate thickness T2 respectively to the tooth point department up end and/or the lower terminal surface of each cutting tooth 21 form the tooth protruding 4 in sword tooth group 2. The material of the upper end face and/or the lower end face of each cutting tooth 21 in the cutter tooth group 2 is removed from the upper end face and/or the lower end face of the substrate 1 by a machining mode to form a material removing groove 3, so that the working strength of the substrate 1 in the production or use process can be ensured, and the working performance of the static blade is improved; meanwhile, the thickness of the cutting teeth 21 can be reduced by utilizing the stripping grooves 3, and the hair trimming effect can be improved by the thinner cutting teeth 21 in the use process of the static blade. Secondly, utilize to remove silo 3 and make the prong up end and/or the lower terminal surface of each cutting tooth 21 in sword tooth group 2 form protruding 4 of tooth, just can utilize protruding 4 of tooth to play the guard action to skin when using, avoid each cutting tooth 21 prong too sharp and fish tail skin, promote the safety in utilization of quiet blade, and when quiet blade laminating skin, the protruding 4 of tooth of each cutting tooth 21 prong department can also play the effect of comb in sword tooth group 2, amazing cranial nerve, accelerate head skin blood circulation and blood oxygen supply, thereby produce comparatively comfortable skin sense, promote the use comfort level of quiet blade.

The machining mode includes but is not limited to a grinding machine, a numerical control machining center, a milling machine, a punch press, a lathe and powder metallurgy forming equipment, the material removing groove 3 is formed in the surface of the substrate 1, and the thickness T3 of each cutting tooth is different from the thickness T2 of the substrate to improve the hair trimming effect. In the actual production process, the material removing groove 3 on the outer surface of the substrate 1 is integrally formed by a stamping process, the stripping groove 3 of the inner surface of the substrate 1 is realized by reducing the thickness of each cutting tooth 21 in the cutter tooth group 2 by grinding. Of course, the method can be realized by other equipment, but the method of processing by a punching and grinding machine is easy to realize and has high production efficiency, so the method of processing by the punching and grinding machine is a preferred embodiment.

In order to facilitate the processing and manufacturing of the tooth protrusions 4 and improve the production benefits of the stationary blade, the tooth protrusion height T1 is smaller than or equal to the substrate thickness T2. Because the tooth protrusions 4 only play a role in preventing skin from being punctured and stimulating skin nerves, as long as the tooth protrusions protrude out of the upper end face and/or the lower end face of each cutting tooth 21, the tooth protrusion height T1 of the upper end face and/or the lower end face at the tooth tip of each cutting tooth 21 is smaller than or equal to the substrate thickness T2, when the cutting blade is produced and machined, the material cost can be reduced, the tooth protrusions 4 can be integrally formed in the punching and grinding process, the production difficulty of the tooth protrusions 4 is reduced, and the production benefit of the stationary blade is improved. Of course, the height T1 of the teeth can be set to be greater than the thickness T2 of the substrate, but the thickness T2 of the substrate is increased accordingly, which increases the material cost or increases the processing difficulty of the teeth 4, and therefore, the embodiment of the present invention is a preferred embodiment.

In order to improve the use skin feeling of the use safety of the static blade, the tooth protrusions 4 comprise upper tooth protrusions 41 and lower tooth protrusions 42 and are correspondingly arranged on the upper end face and the lower end face of the tooth tip of each cutting tooth 21, and joints of the upper tooth protrusions 41 and the lower tooth protrusions 42 and the cutting teeth 21 are in smooth transition respectively. In the knife teeth group 2, the upper end surface and the lower end surface of the tooth tip of each cutting tooth 21 are respectively provided with an upper tooth projection 41 and a lower tooth projection 42 which correspond to each other, and in the using process, when the static blade is in contact with the skin, the upper tooth projections 41 can be in contact with the skin and can stimulate the skin nerves when hair is trimmed, so that the comb is played, the blood circulation of the skin and the blood oxygen supply are accelerated, the skin feels comfortable, and the using comfort of the static blade is improved. The lower tooth protrusions 42 can prevent the tips of the cutting teeth 21 from stabbing the skin and improve the safety of the static blade, and meanwhile, the cutting teeth 21 on the movable blade can be prevented from cutting the skin when the movable blade swings back and forth along the static blade, and the safety of the shaver is improved. Of course, one of the upper teeth 41 and the lower teeth 42 may be disposed at the tip of the cutting tooth 21, but only one of them is disposed to have a function of lowering the stationary blade accordingly, and therefore, it is a preferred embodiment to provide the upper teeth 41 and the lower teeth 42 on the upper end surface and the lower end surface of the tip of each cutting tooth 21 in the cutter tooth group 2, respectively.

In the actual production process, the upper tooth protrusions 41 are formed by forming the downward-concave material removing groove 3 on the outer surface of the substrate 1 through a stamping process, controlling the distance between the edge of the material removing groove 3 and the edge of the substrate 1, and then cutting one side of the substrate 1, which is provided with the material removing groove 3, by using the tooth cutting grinding wheel of the grinding machine, so that a plurality of cutting teeth 21 with the upper tooth protrusions 41 are formed in the material removing groove 3. If the upper tooth projection 41 is not required to be arranged at the tooth tip of each cutting tooth 21, the outer side edge of the material removing groove 3 can be overlapped with the edge of the substrate 1 or placed outside the edge of the substrate 1 to form the open type material removing groove 3 which is concave downwards on the outer surface of the substrate 1, and when the subsequent grinding machine is used for cutting teeth, the upper tooth projection 41 is not arranged at the tooth tip of each cutting tooth 21 in the material removing groove 3. The lower tooth projection 42 is formed by grinding the bottom of the stripping tank 3 depressed downward along the outer surface of the substrate 1, and the lower tooth projection 42 is formed by controlling the distance between the edge of the grinding wheel and the edge of the inner surface of the substrate 1. If the lower teeth projections 42 are not required, the edge portions of the inner surface of the substrate 1 may be covered by controlling the grinding wheel. The upper tooth protrusions 41 and the lower tooth protrusions 42 may be disposed at the same time, or only one of them may be disposed, specifically, according to the user's requirement.

In order to improve the hair trimming performance of each cutting tooth 21 in the cutter tooth group 2, the projection width T6 of the upper tooth is smaller than the projection width T7 of the lower tooth from the tooth tip projection direction of each cutting tooth 21, so that the projection shapes of the upper tooth projection 41 and the lower tooth projection 42 are in a cone shape with a narrow top and a wide bottom, thereby not only facilitating the tooth cutting operation of the tooth cutting grinding wheel, but also improving the production benefit of the static blade; moreover, the sharpness of the cutting edges on both sides of the cutting teeth 21 can be adjusted by controlling the width ratio of the upper teeth protrusions 41 to the lower teeth protrusions 42, so that the hair cutting performance of each cutting tooth 21 in the blade tooth group 2 can be ensured. The smaller the width ratio of the upper teeth projections 41 to the lower teeth projections 42, the higher the sharpness of the cutting edges on both sides of the cutting teeth 21. Conversely, the larger the width ratio of the upper gear protrusion 41 to the lower gear protrusion 42, the lower the sharpness of the cutting edges on both sides of the cutting tooth 21, and the specific arrangement may be determined according to actual needs or user requirements.

In order to improve the fit degree of the static blade with the skin when the static blade is used, when viewed from the projection direction of any one end of the two ends of the substrate 1, the outer surface of the substrate 1 is an arc-shaped surface, the substrate 1 is designed to be arc-shaped, and the cutter tooth group 2 is arranged at one end of the arc-shaped substrate 1. Of course, the substrate 1 may be horizontal, but because the static blade is horizontal, the static blade has relatively poor fit with the skin when in use, and therefore, the substrate 1 having an arc shape is a preferred embodiment.

In order to improve the hair shaving effect of the static blade, the thickness T3 of each cutting tooth in the cutter tooth group 2 is less than the thickness T2 of the substrate and is more than or equal to 0.08mm. The thickness T2 of the substrate is between 0.3mm and 2mm, and can be changed according to different purposes in actual use. For example for shaving applications, the substrate thickness T2 is preferably between 0.35 and 0.5 mm. For hair dressing, the thickness T2 of the substrate of the static blade can be correspondingly increased and is basically more than 0.5mm, and the specific selection can be determined according to the structure of the static blade. The thickness T2 of the substrate of the static blade used in the shaving field is preferably more than 0.35mm, so that the working strength of the static blade is ensured, and the production cost can be reduced to the maximum extent. Theoretically, the thinner the thickness of each cutting tooth 21 in the blade tooth group 2, the better the hair removal effect of the stationary blade. In order to avoid the twisting deformation or the breakage of each cutting tooth 21 in the cutter tooth group 2 and influence the shaving of the hair, the thickness T3 of each cutting tooth in the set 2 of cutting teeth may also be determined according to the hardness of the substrate 1, for example:

when the hardness of the substrate 1 is between HRC52 and HRC60, the thickness of the cutter tooth group 2 (which can also be regarded as the thickness T3 of each cutting tooth) is preferably 0.13mm +/-0.03 mm. Therefore, the hair can be prevented from being distorted, deformed, cracked or broken when entering the hair guide grooves adjacent to the cutting teeth 21, the working stability of each cutting tooth 21 in the cutter tooth group 2 is ensured, and the hair trimming effect is improved.

When the hardness of the substrate 1 is less than HRC52, the toughness of the substrate 1 is improved, and the thickness of the cutter tooth group 2 can be set to 0.10mm or less, so that the respective cutting teeth 21 in the cutter tooth group 2 can be prevented from being chipped or broken.

When the hardness of the substrate 1 is greater than HRC60, the toughness of the substrate 1 is correspondingly reduced, but the brittleness of the substrate 1 is correspondingly improved, and in order to prevent the cutting teeth 21 in the cutter tooth group 2 from cracking or breaking, the thickness T3 of each cutting tooth in the cutter tooth group 2 can be correspondingly increased, for example, the thickness T3 of each cutting tooth in the cutter tooth group 2 is set to be one half, two thirds or three quarters of the thickness T2 of the substrate to ensure the usability of the razor blade. The specific thickness of each cutting tooth 21 in the cutter tooth group 2 can be flexibly set according to different materials and different hardness of the substrate 1, and this embodiment is not further limited.

For promoting static blade when the hair is pruned the laminating degree with the skin, promote the comfort of skin when the hair is pruned, it is less than substrate thickness T2 to go silo degree of depth T4, it is less than substrate thickness T2 to go silo 3 along the setting of 1 outside surface undercut degree of depth of substrate, when carrying out the grinding to 2 internal surfaces of cutter tooth group and form cutting working face 5, not only furthest has reduced each cutting tooth thickness T3 in the cutter tooth group 2, can also utilize the poor 6 working strength of each cutting tooth 21 in the cutter tooth group 2 of section that the 3 edge outside surface undercut of substrate formed of silo, promote the hair pruning performance and the pruning effect of static blade. Secondly, the depth T4 of the material removing groove is set to be smaller than the thickness T2 of the substrate, when the outer surface of each cutting tooth 21 (namely the groove bottom surface of the material removing groove 3) in the cutter tooth group 2 is contacted with the skin, the outer surface of the substrate 1 cannot generate a pushing feeling on the skin, and therefore the attaching degree of the shaving blade and the skin and the use comfort can be effectively improved.

The thinner the thickness of each cutting tooth 21 in the cutter tooth group 2, the greater the amount of grinding of the inner surface of each cutting tooth 21 in the cutter tooth group 2. Conversely, as the thickness of the cutter tooth group 2 becomes thicker, the amount of grinding of the inner surface of each cutting tooth 21 in the cutter tooth group 2 becomes smaller. Thus, in an actual production process, the stripping groove depth T4 (i.e., the depth of the depression of the blade tooth group 2 along the outer surface of the substrate 1) may also depend on the actual thickness of each cutting tooth 21 in the blade tooth group 2, for example:

when the thickness T3 of each cutting tooth in the cutter tooth group 2 is required to be less than 0.10mm, the grinding amount of the inner surface of each cutting tooth 21 in the cutter tooth group 2 is relatively large, and in order to ensure the working strength of each cutting tooth 21 in the cutter tooth group 2, the material removing groove depth T4 can be appropriately reduced (the optimal material removing groove depth T4 is less than half of the substrate thickness T2). When the inner surface of the cutter tooth group 2 (which can also be regarded as the inner surface of the material removing groove 3) is ground, the step surface 6 between the material removing groove 3 and the substrate 1 is subjected to less grinding, so that the step surface 6 can be used for supporting the tooth root of each cutting tooth 21 in the cutter tooth group 2, and the working strength of each cutting tooth 21 in the cutter tooth group 2 is ensured.

When the thickness of each cutting tooth 21 in the cutter tooth group 2 is required to be more than 0.20mm, the grinding amount of the inner surface of each cutting tooth 21 in the cutter tooth group 2 is relatively small. At this time, the depth of the depression of the material removing groove 3 along the outer surface of the substrate 1 may be increased, for example, the material removing groove depth T4 is greater than the substrate thickness T2 or greater than two thirds, one half, and the like of the substrate thickness T2, and the working strength of each cutting tooth 21 in the cutter tooth group 2 may also be ensured. But also correspondingly increases the height difference between the bottom plane of the stripping tank 3 (which can also be regarded as the outer surface of each cutting tooth 21 in the cutter tooth group 2) and the outer surface of the substrate 1. When the outer surface of the cutter tooth group 2 contacts with the skin, the outer surface of the substrate 1 can generate a pushing force on the skin, the fit degree of the cutter tooth group 2 and the skin can be affected, and the skin contact feeling is relatively poor. Therefore, it is preferable that the stripping groove depth T4 of the stripping groove 3 depressed downward along the substrate 1 is smaller than the substrate thickness T2.

Because the cutter tooth group 2 is formed by performing the cutter tooth operation on the basis of the material removing groove 3, in order to improve the hair trimming benefit of the static blade, the material removing grooves 3 are respectively arranged at the edges of two opposite sides of the substrate 1, and the cutter tooth group 2 is formed at two sides of the substrate 1 by performing the cutter tooth operation on one side of each material removing groove 3. Because each cutting tooth thickness T3 in the cutter tooth group 2 is thinner than the substrate thickness T2, in order to prevent the two sides of the cutter tooth group 2 from generating distortion when the static blade is used, the length of the cutter tooth group 2 (which can also be regarded as the length of the material removing groove 3) is smaller than the length of the substrate 1, so that the distance T5 between the two ends of the cutter tooth group 2 and the edges of the two ends of the substrate 1 is 3 mm-10 mm, preferably 5mm, when the static blade is used, the edge distance T5 can be used for effectively supporting the cutter tooth groups 2 at the two sides of the substrate 1, each cutting tooth 21 in the cutter tooth group 2 is prevented from generating distortion when the static blade is used, and the integral working strength and the working stability of the static blade are ensured. If the edge distance T5 of 3 mm-10 mm is not reserved at the two ends of the substrate 1, the cutting teeth 21 are arranged on the two sides of the substrate 1, so that each cutting tooth 21 can only be connected with the substrate 1 by using the tooth root, and each cutting tooth 21 is easy to distort and deform during use, thereby seriously affecting the use performance and the working stability of the static blade. Of course, the edge distance T5 between the two end edge portions of the substrate 1 may be set larger, for example, 15mm, 20mm or larger, but the larger the edge distance T5, the corresponding decrease in the number of cutting teeth 21 in the cutter tooth group 2 may result in a decrease in shaving efficiency. Therefore, the optimal embodiment is that the edge distance T5 between the two end edges of the substrate 1 is 3 mm-10 mm, the working strength of each cutting tooth 21 of the cutter tooth group 2 is ensured, meanwhile, the working strength of the static blade is ensured without increasing the thickness of the substrate 1, and the material cost of the static blade is reduced.

In the production and processing process, in order to conveniently control the thickness T3 of each cutting tooth in the cutter tooth group 2 to be smaller than the thickness T2 of the substrate, and improve the hair trimming benefit of the static blade, the material removing groove 3 comprises an upper material removing groove 31 and a lower material removing groove 32, the upper material removing groove 31 is arranged on the outer surface of the substrate 1, so that the upper end surface of the tooth tip of each cutting tooth 21 in the cutter tooth group 2 forms an upper tooth protrusion 41, the upper material removing groove 31 is integrally formed with the substrate 1 through a stamping process, the outer surface of the upper material removing groove 31 is lower than the outer surface of the substrate 1 in the forming process, the inner surface protrudes out of the inner surface of the substrate 1, then, the gear cutting operation is carried out on one side of the substrate 1 through the gear cutting grinding wheel, so that the upper material removing groove 31 forms the cutter tooth group 2 consisting of a plurality of cutting teeth 21, and at the moment, the outer surface of the upper material removing groove 31 also forms the outer surface of each cutting tooth 21. In the actual production process, the width of the upper tooth projection 41 can be controlled by controlling the distance between the outer side edge of the upper material removing groove 31 and the edge part of the substrate 1, even the upper end surface of each cutting tooth 21 does not form the upper tooth projection 41, at the moment, the outer side edge of the upper material removing groove 31 is only required to be overlapped with the edge part of the substrate 1 or exceed the edge part of the substrate 1, and thus, the upper material removing groove 31 is formed into a groove with one open side on the outer surface of the substrate 1. The specific need is not to reserve the upper tooth projection 41 or how much the width of the upper tooth projection 41 is reserved, and the adjustment can be realized only by adjusting the position of the insert in the stamping die of the upper material removing groove 31. The lower trough 32 is disposed on the inner surface of the substrate 1 so that the thickness T3 of each cutting tooth in the cutter tooth group 2 is smaller than the thickness T2 of the substrate and a lower tooth projection 42 is formed on the lower end surface at the tooth tip of each cutting tooth 21. After the upper material removing groove 31 is formed in a punching mode, the inner surface of the upper material removing groove 31 protrudes out of the inner surface of the substrate 1, at the moment, grinding operation is conducted on the inner surface, protruding out of the inner surface of the substrate 1, of the upper material removing groove 31 through grinding equipment to form a cutting working face 5, meanwhile, the thickness T3 of each cutting tooth can be reduced, and the hair trimming effect is improved. When the bottom of the upper material-removing groove 31 is ground, the lower end surface of each cutting tooth 21 is formed into the lower tooth projection 42 by utilizing the distance between the grinding wheel and the side wall of the substrate 1. Whether the tooth protrusions 42 are reserved on the lower end faces of the cutting teeth 21 or the width of the lower tooth protrusions 42 is reserved can be achieved by only adjusting the distance between a grinding wheel of grinding equipment and the side wall of the substrate 1.

The above embodiments should not be considered as limiting the present invention, but any modifications made based on the spirit of the present invention should be within the scope of the present invention.

Claims

1. A static blade comprises a substrate and is characterized in that a cutter tooth group consisting of a plurality of cutting teeth is arranged at the edge of at least one side of the substrate, a material removing groove is arranged on the upper end surface and/or the lower end surface of the substrate, so that the thickness of each cutting tooth in the cutter tooth group is smaller than that of the substrate, and a tooth bulge is formed on the upper end surface and/or the lower end surface of the tooth tip of each cutting tooth in the cutter tooth group.

2. A stationary blade according to claim 1, characterized in that the tooth projection height is less than or equal to the substrate thickness.

3. The stationary blade according to claim 1, wherein said teeth protrusions comprise upper teeth protrusions and lower teeth protrusions and are respectively disposed on the upper end surface and the lower end surface of the tooth tip of each cutting tooth, and the joints between the upper teeth protrusions and the cutting teeth and the joints between the lower teeth protrusions and the cutting teeth are respectively rounded.

4. A stationary blade as claimed in claim 3, characterized in that the upper tooth projection width is smaller than the lower tooth projection width, viewed in projection of the tooth tip of each cutting tooth.

5. A stationary blade as claimed in claim 1, characterized in that the outer surface of the substrate is curved, viewed in projection at either end of the substrate.

6. A stationary blade according to claim 1, wherein each cutting tooth of the set of cutting teeth has a thickness less than the thickness of the substrate and greater than or equal to 0.08mm.

7. A stationary blade according to claim 1, characterized in that the stripping groove depth is smaller than the substrate thickness.

8. The stationary blade according to claim 1, wherein the blade teeth are provided at opposite side edges of the substrate, respectively, and the length of the blade teeth is smaller than that of the substrate such that both ends of the blade teeth are spaced from the edges of the substrate by 3mm to 10mm.

9. The stationary blade as claimed in any one of claims 1 to 8, wherein the discharging groove comprises an upper discharging groove and a lower discharging groove, the upper discharging groove is provided on the outer surface of the substrate so that the upper end surface of each cutting tooth of the group of cutting teeth forms an upper tooth projection, the lower discharging groove is provided on the inner surface of the substrate so that the thickness of each cutting tooth of the group of cutting teeth is smaller than the thickness of the substrate and the lower end surface of each cutting tooth forms a lower tooth projection.