Cutter blade, granulator, and method for manufacturing cutter blade

Abstract

To provide a cutter blade, and a method for manufacturing a cutter blade capable of reducing a manufacturing cost.SOLUTION: A cutter blade 1 according to an embodiment comprises: an insert member 140 including a blade edge portion 120 for cutting a material 206 extruded from a hole 205 formed on a plate surface 204 of a die plate 201, onto the plate surface 204 by sliding along the plate surface 204, and an insertion portion 130 having a first surface 130a and a second surface 130b facing the first surface 130a, and connected to the blade edge portion 120; and a main body part 110 for supporting the insert member 140 by sandwiching the first surface 130a and the second surface 130b.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a cutter blade, a granulating device, and a method for manufacturing a cutter blade. [Background technology]

[0002] Patent Document 1 describes a cutter blade that cuts a resin material extruded from holes formed in a die plate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-165316 Summary of the Invention [Problem to be solved by the invention]

[0004] When using a cutter blade as described in Patent Document 1, it is possible to join the hardened layer by brazing in order to improve the durability of the cutting edge. However, brazing requires heating at a temperature of about 1000°C, which causes deformation of the cutting edge. In order to correct the deformation of the cutting edge, additional machining is required, which increases the manufacturing cost.

[0005] Other objects and novel features will become apparent from the description of this specification and the accompanying drawings. [Means for solving the problem]

[0006] A cutter blade in one embodiment includes an insert member including a cutting edge portion that slides along a plate surface of a die plate having a plate surface with holes formed therein to cut material extruded from the holes onto the plate surface, an insertion portion having a first surface and a second surface opposite the first surface and connected to the cutting edge portion, and a main body portion that supports the insert member by clamping the first surface and the second surface.

[0007] A cutter blade in one embodiment includes a cutting edge portion that slides along a plate surface of a die plate having a plate surface with holes formed therein, thereby cutting material extruded from the holes onto the plate surface, and an insertion portion connected to the cutting edge portion, and is equipped with an insert member containing metal as a material, and a main body portion that supports the insert member by clamping the insertion portion and contains at least one of resin, metal, and ceramic as a material.

[0008] A granulation device according to one embodiment includes the cutter blade, a cutter blade holder portion to which the cutter blade is connected, and the die plate.

[0009] A manufacturing method of a cutter blade in one embodiment includes an insert member preparation step of preparing an insert member including a cutting edge portion that cuts material extruded from a hole onto a plate surface of a die plate having a plate surface formed with holes by sliding along the plate surface, and an insertion portion that has a first surface and a second surface opposite to the first surface and is connected to the cutting edge portion, a main body preparation step of preparing a main body portion, and an attachment step of attaching the insert member to the main body portion so as to support the insert member by sandwiching the first surface and the second surface.

[0010] A manufacturing method of a cutter blade in one embodiment includes an insert member preparation step of preparing an insert member including a cutting edge portion that slides along a plate surface of a die plate having a plate surface with holes formed therein, the cutting edge portion cutting material extruded from the hole onto the plate surface, and an insertion portion connected to the cutting edge portion, the insert member including a metal as a material; an insert member placement step of placing the insert member in a cavity of a mold; an insert molding step of supporting the insert member by sandwiching the insertion portion by filling and solidifying a material including at least one of molten resin, molten metal, and ceramic powder into the cavity, and molding a main body including at least one of resin, metal, and ceramic as a material; and a removal step of removing the cutter blade including the insert member and the main body portion from the mold. Effect of the Invention

[0011] According to the embodiment, it is possible to provide a cutter blade, a granulating device, and a method for manufacturing a cutter blade, which can reduce manufacturing costs. [Brief description of the drawings]

[0012] [Figure 1] FIG. 2 is a configuration diagram illustrating a granulation device using a cutter blade according to the first embodiment. [Diagram 2] FIG. 2 is a perspective view illustrating a die plate in the granulating device using the cutter blade according to the first embodiment. [Diagram 3] FIG. 2 is a perspective view illustrating a cutter blade according to the first embodiment. [Figure 4] FIG. 2 is a side view illustrating a cutter blade according to the first embodiment. [Diagram 5] FIG. 2 is a front view illustrating a cutter blade according to the first embodiment. [Figure 6] FIG. 2 is an exploded perspective view illustrating a cutter blade according to the first embodiment. [Figure 7] 2 is a side view illustrating a main body of the cutter blade according to the first embodiment. FIG. [Figure 8]3 is a side view illustrating an insert member of the cutter blade according to the first embodiment. FIG. [Figure 9] FIG. 4 is a flow chart illustrating a manufacturing method of the cutter blade according to the first embodiment in which an insert member is fitted into a groove in a main body portion. [Figure 10] 5A to 5C are diagrams illustrating a mounting step of mounting an insert member to a main body in the cutter blade manufacturing method according to the first embodiment. [Figure 11] FIG. 4 is a flow chart illustrating a manufacturing method by insert molding among the manufacturing methods of the cutter blade according to the first embodiment. [Figure 12] FIG. 11 is a perspective view illustrating a cutter blade according to a second embodiment. [Figure 13] FIG. 11 is an exploded perspective view illustrating a cutter blade according to a second embodiment. [Figure 14] FIG. 11 is a perspective view illustrating a cutter blade according to a third embodiment. [Figure 15] FIG. 11 is an exploded perspective view illustrating a cutter blade according to a third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] For clarity of explanation, the following description and drawings are omitted and simplified as appropriate. In addition, in each drawing, the same elements are given the same reference numerals, and duplicate explanations are omitted as necessary.

[0014] (Embodiment 1) The cutter blade and the manufacturing method thereof according to the embodiment 1 will be described. First, a granulating device will be described as an example of a device using the cutter blade. Then, the cutter blade and the manufacturing method thereof will be described.

[0015] <Underwater granulation equipment> Fig. 1 is a configuration diagram illustrating a granulation device using a cutter blade according to embodiment 1. Fig. 2 is a perspective view illustrating a die plate in the granulation device using the cutter blade according to embodiment 1. In Fig. 1, an exploded view of a part of the granulation device is shown within a frame.

[0016] As shown in Fig. 1 and Fig. 2, the granulation device is, for example, an underwater granulation device 200. The underwater granulation device 200 is connected to the downstream side of the extrusion device 100. The extrusion device 100 includes a drive unit 101, a reducer 102, a cylinder 103, and a screw 104. The drive unit 101 such as a motor transmits the rotation adjusted by the reducer 102 to the screw 104. Therefore, the screw 104 rotates inside the cylinder 103 by the adjusted power source of the drive unit 101.

[0017] The material 206 that is fed into the cylinder 103 from a predetermined position therein is extruded toward the underwater granulation device 200 by the rotating screw 104. The fed material 206 is, for example, a resin material. The extrusion device 100 plasticizes and kneads the resin material, for example, by heating it in the cylinder 103 and rotating the screw 104, and extrudes it toward the underwater granulation device 200 as a molten resin.

[0018] The underwater granulation device 200 includes a die plate 201, a cutter blade holder unit 202, and a drive unit 203. The die plate 201 and the cutter blade holder unit 202 are disposed underwater. The die plate 201 has a plate surface 204. A plurality of holes 205 are formed in the plate surface 204. A material 206 extruded by the rotating screw 104 is extruded onto the plate surface 204 from the holes 205 formed in the plate surface 204. The material 206 extruded onto the plate surface 204 is, for example, a molten resin. In FIG. 2, only some of the holes 205 and the material 206 are labeled to avoid cluttering the drawing.

[0019] The die plate 201 and the plate surface 204 have a central axis C. The cutter blade holder part 202 is provided facing the die plate 201. The cutter blade holder part 202 rotates around the central axis C as a rotation axis by the power source of the drive part 203. The cutter blade holder part 202 holds a plurality of cutter blades 1. In FIG. 1, only some of the cutter blades 1 are labeled with reference numerals to avoid cluttering the drawing.

[0020] For example, the cutter blades 1 are held at equal intervals on the periphery of a circular cutter blade holder part 202. As the cutter blade holder part 202 rotates, each cutter blade 1 rotates on the surface of the plate 204. Each cutter blade 1 slides along the plate surface 204 to cut the material 206 extruded from the hole 205 onto the surface of the plate 204. For example, molten resin extruded from the hole 205 onto the surface of the plate 204 is cut by the cutter blade 1. The cut molten resin solidifies in water and becomes resin pellets.

[0021] <Cutter blade> Next, the cutter blade 1 will be described. FIG. 3 is a perspective view illustrating the cutter blade 1 according to the first embodiment. FIG. 4 is a side view illustrating the cutter blade 1 according to the first embodiment. FIG. 5 is a front view illustrating the cutter blade 1 according to the first embodiment. FIG. 6 is an exploded perspective view illustrating the cutter blade 1 according to the first embodiment. FIG. 7 is a side view illustrating the main body of the cutter blade 1 according to the first embodiment. FIG. 8 is a side view illustrating the insert member of the cutter blade according to the first embodiment. As shown in FIGS. 3 to 8, the cutter blade 1 includes a main body 110 and an insert member 140. The main body 110 supports the insert member 140 by sandwiching the insert member 140.

[0022] Here, an XYZ orthogonal coordinate system is introduced to explain the cutter blade 1. When the cutter blade 1 is placed on the plate surface 204, the direction perpendicular to the plate surface 204 is the Z-axis direction. The +Z-axis direction is called the upward direction, and the -Z-axis direction is called the downward direction. The upward and downward directions are for the convenience of explaining the cutter blade 1, and do not indicate the directions when the cutter blade 1 is actually used. The direction in which the cutting edge of the cutter blade 1 extends is called the Y-direction. The direction perpendicular to the Y-axis direction and the Z-axis direction is called the X-axis direction. Below, each configuration of the main body 110 and the insert member 140 of the cutter blade 1 will be explained. Note that some symbols of each configuration are omitted to avoid cluttering the drawings.

[0023] <Main body> The main body 110 has an attachment portion 111 and a ridge portion 115. The attachment portion 111 and the ridge portion 115 are connected adjacent to each other in the Y-axis direction. The main body 110 may include, as a material, a metal such as stainless steel. The main body 110 may also include, as a material, a resin such as a heat-resistant resin. Note that the material of the main body 110 is not limited to a material containing metal or a material containing resin, but may also be a material containing ceramic, a material containing fiber, a resin containing filler, or the like.

[0024] The mounting portion 111 is fixed to the cutter blade holder portion 202 which transmits power for sliding along the plate surface 204. The mounting portion 111 is formed, for example, on the -Y axis direction side of the main body portion 110. The mounting portion 111 is, for example, in the shape of a quadrangular prism and has a bottom surface 111a, a top surface 111b, a front surface 111c, and a rear surface 111f. The bottom surface 111a is the surface on the -Z axis direction side, and the top surface 111b is the surface on the +Z axis direction side. The front surface 111c is the surface on the -X axis direction side, and the rear surface 111f is the surface on the +X axis direction side.

[0025] The mounting portion 111 is formed with a hole 113 for fixing to the cutter blade holder portion 202. There may be one or more holes 113. The hole 113 penetrates from the top surface 111b to the bottom surface 111a. For example, the cutter blade 1 is fixed to the cutter blade holder portion 202 by inserting a bolt into the hole 113 of the mounting portion 111 and a hole in the cutter blade holder portion 202. Note that the mounting portion 111 may have something other than the hole 113 formed therein as long as it is for fixing to the cutter blade holder portion 202.

[0026] The mounting portion 111 may have a groove 114 for holding the insert member 140. The groove 114 is formed, for example, in a front surface 111c on the -X-axis direction side of the mounting portion 111. The groove 114 extends in the Y-axis direction on the front surface 111c. That is, the opening of the groove 114 on the front surface 111c extends in the Y-axis direction. The groove 114 is formed in the +X-axis direction from the opening on the front surface 111c. The bottom of the groove 114 faces the rear surface 111f. The groove 114 may be connected to an end surface 111g on the -Y-axis direction side of the mounting portion 111. That is, the groove 114 may be formed in the front surface 111c and the end surface 111g. Therefore, the opening of the groove 114 is connected to the front surface 111c and the end surface 111g. The opening of the groove 114 on the end surface 111g extends in the X-axis direction.

[0027] The ridge portion 115 is formed, for example, in a portion of the main body portion 110 on the +Y-axis direction side. Thus, the ridge portion 115 is connected to the +Y-axis direction side of the attachment portion 111. The ridge portion 115 extends, for example, in the Y-axis direction. The ridge portion 115 has an upper surface 115b, a front surface 115c, a recessed surface 115e, and a rear surface 115f. The upper surface 115b is a surface on the +Z-axis direction side, and the front surface 115c is a surface on the -X-axis direction side. The recessed surface 115e is a surface on the -Z-axis direction side, and the rear surface 111f is a surface on the +X-axis direction side. The ridge portion 115 is columnar in shape extending in the Y-axis direction with the upper surface 115b, the front surface 115c, the recessed surface 115e, and the rear surface 115f as side surfaces.

[0028] The upper surface 115b is flush with the upper surface 111b of the mounting portion 111, for example. A groove 114 for holding the insert member 140 is formed in the front surface 115c. That is, the groove 114 of the mounting portion 111 is also formed in the ridge portion 115. The groove 114 extends in the Y-axis direction in the front surface 115c. That is, the opening of the groove 114 in the front surface 115c extends in the Y-axis direction. The groove 114 is formed in the +X-axis direction from the opening in the front surface 115c. The bottom of the groove 114 faces the rear surface 115f. The groove 114 may be connected to the end surface 115g on the +Y-axis side of the ridge portion 115. That is, the groove 114 may be formed in the front surface 115c and the end surface 115g. Therefore, the opening of the groove 114 is connected to the front surface 115c and the end surface 115g. The opening of the groove 114 in the end surface 115g extends in the X-axis direction.

[0029] <Insert material> The insert member 140 includes a cutting edge portion 120 and an insertion portion 130. The cutting edge portion 120 and the insertion portion 130 are, for example, plate-shaped. The insertion portion 130 is connected to the cutting edge portion 120. Specifically, the insertion portion 130 is connected to an end portion of the cutting edge portion 120 opposite to the cutting edge. The cutting edge portion 120 and the insertion portion 130 are connected to form an obtuse angle. For example, when viewed from the Y-axis direction, the cutting edge portion 120 and the insertion portion 130 may form an obtuse angle of 130°.

[0030] The insert member 140 including the cutting edge portion 120 and the insertion portion 130 may be formed as a single unit, or the cutting edge portion 120 and the insertion portion 130 may be joined together to form a single unit. The insert member 140 may include a hardened layer such as TiC cermet as a material. Note that the insert member 140 may include other metals, ceramics, or resins as a material other than TiC cermet. For example, the insert member 140 may include a metal such as stainless steel.

[0031] The cutting edge portion 120 and the insertion portion 130 of the insert member 140 may contain different materials. For example, the cutting edge portion 120 may contain TiC cermet as a material, and the insertion portion 130 may be made of a material including metal, a material including resin, a material including ceramic, a material including fiber, or a resin including filler as a material.

[0032] The cutting edge portion 120 is a portion that slides on the plate surface 204. The cutting edge portion 120 slides along the plate surface 204 of the die plate 201 having the plate surface 204 in which the holes 205 are formed, thereby cutting the material 206 extruded from the holes 205 onto the plate surface 204. The cutting edge portion 120 is, for example, a plate-like shape extending in the Y-axis direction. If the portion where the cutting edge portion 120 connects to the insertion portion 130 is the connection surface 120d, the cutting edge portion 120 has a sliding surface 120a, an inclined surface 120c, a connection surface 120d, and a recessed surface 120e. The cutting edge portion 120 is, for example, a plate-like shape extending in the Y-axis direction with the inclined surface 120c and the recessed surface 120e as plate surfaces and the sliding surface 120a and the connection surface 120d as end surfaces.

[0033] The sliding surface 120a slides on the plate surface 204. As the sliding surface 120a slides on the plate surface 204, the material 206 extruded onto the plate surface 204 from the hole 205 is cut by the cutting edge. The sliding surface 20a has a shape that matches the plate surface 204 so that it can slide on the plate surface 204. When the plate surface 204 is flat, the sliding surface 20a is also flat. When the plate surface 204 is curved, the sliding surface 20a is curved in accordance with the curvature of the plate surface 204.

[0034] The sliding surface 120a is located on the same plane as the bottom surface 111a of the attachment portion 111 of the main body portion 110. Therefore, the main body portion 110 has the bottom surface 111a located on the same plane as the sliding surface 120a. This makes it possible to easily align the insert member 140. For example, when inserting the insert member 140 into the main body portion 110, alignment can be easily performed. Furthermore, when insert molding is performed, alignment of the insert member 140 in the mold can be easily performed.

[0035] The inclined surface 120c is inclined with respect to the sliding surface 120a. For example, the inclined surface 120c is inclined by 50 degrees with respect to the sliding surface 120a. The sliding surface 120a and the inclined surface 120c form a cutting edge. That is, the angle between the sliding surface 120a and the inclined surface 120c forms the cutting edge.

[0036] The indented surface 120e is a surface facing the inclined surface 120c. The indented surface 120e may be curved, for example, in a concave shape. The indented surface 120e may be smoothly connected to the indented surface 112e. The indented surface 120e is in contact with a portion of the front surface 115c of the ridge portion 115 below the groove 114.

[0037] The insertion portion 130 is, for example, plate-shaped. The insertion portion 130 extends in the Y-axis direction. If the portion where the insertion portion 130 connects to the blade tip portion 120 is the connection surface 130d, the insertion portion 130 has a first surface 130a, a second surface 130b, a connection surface 130d, and an edge surface 130e. The first surface 130a faces the -Z-axis direction. The second surface 130b faces the +Z-axis direction. Thus, the second surface 130b faces the first surface 130a. The edge surface 130e is connected to the periphery of the first surface 130a and the periphery of the second surface 130b. The insertion portion 130 is plate-shaped extending in the Y-axis direction with the first surface 130a and the second surface 130b as plate surfaces and the edge surface 130e and the connection surface 130d as end surfaces.

[0038] The insertion portion 130 is located inside the groove 114 of the main body 110. The main body 110 supports the insert member 140 by sandwiching the insertion portion 130. Therefore, the ridge 115 has the groove 114 that sandwiches the insertion portion 130. Note that both the ridge 115 and the attachment portion 111 may have the groove 114 that sandwiches the insertion portion 130. For example, the main body 110 may support the insert member 140 by sandwiching the first surface 130a and the second surface 130b. The edge surface 130e facing the part of the insertion portion 130 to which the cutting edge portion 20 is connected contacts the bottom surface of the groove 14 of the main body 10. Also, the ridge 115 of the main body 110 may contact the insertion portion 130 at the groove 114 and contact the cutting edge portion 120 at a part of the front surface 115c below the groove 114.

[0039] The insertion portion 130 may extend to the groove 114 of the attachment portion 111. In this case, a hole 133 may be formed in the insertion portion 130. The hole 133 may communicate with the hole 113 and be fixed to the cutter blade holder portion 202 by a bolt. When the insert member 140 is inserted into the main body portion 110, the insert member 140 may be replaceable with respect to the main body portion 110.

[0040] <Manufacturing method of cutter blade> Next, a manufacturing method of the cutter blade 1 according to this embodiment will be described. The cutter blade 1 may be manufactured by forming the main body 110 and the insert member 140 separately and fitting the insert member 140 into the groove 114 of the main body 110. The cutter blade 1 may also be manufactured by insert molding. Specifically, the insert molding is manufactured by placing the insert member 140 inside a metal mold, filling the inside of the metal mold with molten resin, and solidifying it. In this case, the main body 110 may contain resin as a material. Note that, when performing insert molding, it is not limited to resin molding (including resin + filler), but metal molding and ceramic molding may also be used. Below, a manufacturing method in which the insert member 140 is fitted into the groove 114 of the main body 110 and a manufacturing method by insert molding will be described.

[0041] <Manufacturing method of cutter blade for fitting insert member into groove of main body> 9 is a flow chart illustrating a manufacturing method of mounting the insert member 140 in the groove 114 of the body portion 110 among the manufacturing methods of the cutter blade according to the first embodiment. As shown in FIG. 9, the manufacturing method of the cutter blade 1, which mounts the insert member 140 in the groove 114 of the body portion 110, includes an insert member preparation step (step S11), a body portion preparation step (step S12), and a mounting step (step S13). Note that the order of the insert member preparation step and the body portion preparation step may be reversed. That is, the body portion preparation step may be performed in step S11, and the insert member preparation step may be performed in step S12.

[0042] First, as shown in step S11, in an insert member preparation step, the insert member 140 is prepared. The insert member 140 may be formed by injection molding or may be formed by a 3D printer. The insert member 140 may be made of a material that contains a metal, such as TiC cermet, or may contain a resin (which may contain a filler) or ceramic. The insert member 140 is formed to include the cutting edge portion 120 and the insertion portion 130.

[0043] The cutting edge portion 120 slides along the plate surface 204 of the die plate 201 having the plate surface 204 with the holes 205 formed therein, thereby cutting the material 206 extruded from the holes 205 onto the plate surface 204. The insertion portion 130 is connected to the cutting edge portion 120.

[0044] In the insert member preparation step, the insertion portion 130 may have a first surface 130a and a second surface 130b facing the first surface 130a. The insertion portion 130 may have an edge surface 130e connected to the periphery of the first surface 130a and the periphery of the second surface 130b. The cutting edge portion 120 may have a sliding surface 120a that slides on the plate surface 204. The cutting edge portion 120 and the insertion portion 130 of the insert member 140 may be made of different materials, such as TiC cermet, that contain metal, resin (which may contain filler), or ceramic.

[0045] Next, as shown in step S12, in the main body preparation step, the main body 110 is prepared. The main body 110 may be formed by injection molding or may be formed by a 3D printer. In the main body preparation step, the main body 110 may be made to contain a metal, a resin (which may contain a filler), or a ceramic as a material. The main body 110 may have a bottom surface 111a. The main body 110 may also have an attachment portion 111 connected to the cutter blade holder portion 202 that transmits power for sliding along the plate surface 204, and a ridge portion 115. Furthermore, the main body 110 may have a groove 114. For example, the ridge portion 115 and the attachment portion 111 may have the groove 114 that sandwiches the insertion portion 130.

[0046] FIG. 10 is a diagram illustrating a mounting step of mounting the insert member 140 to the main body portion 110 in the manufacturing method of the cutter blade 1 according to the first embodiment.

[0047] Next, as shown in step S13 of FIG. 9 and FIG. 10, in the mounting step, the insert member 140 is mounted on the main body 110. Specifically, the insert member 140 is mounted on the main body 110 so as to support the insert member 140 by sandwiching the first surface 130a and the second surface 130b of the insertion portion 130. For example, the insertion portion 130 is inserted into the groove 114 so as to sandwich the first surface 130a and the second surface 130b. The edge surface 130e of the insertion portion 130 facing the portion to which the cutting edge portion 120 is connected may be in contact with the main body 110 at the bottom of the groove 114. The ridge portion 115 may be in contact with the recessed surface 120e of the cutting edge portion 120 at the front surface 115c. The hole 113 and the hole 133 may be connected to each other so as to be fixed by a bolt.

[0048] The insert member 140 may be attached to the main body 110 so as to be replaceable. For example, the insert member 140 is attached to the main body 110 using a bolt. The main body 110 may also be attached so as to have a bottom surface 111a that is flush with the sliding surface 120a. Specifically, the bottom surface 111a of the attachment portion 111 is attached so as to be flush with the sliding surface 120a. In this manner, the cutter blade 1 can be manufactured.

[0049] <Manufacturing method of cutter blade by insert molding> Fig. 11 is a flow chart illustrating a manufacturing method by insert molding among the manufacturing methods of the cutter blade 1 according to embodiment 1. As shown in Fig. 11, the manufacturing method of the cutter blade 1 by insert molding includes an insert member preparation step (step S21), an insert member arrangement step (step S22) of arranging the insert member 140 in a cavity of a mold, an insert molding step (step S23) of performing insert molding by filling and solidifying a material containing at least one of molten resin, molten metal, and ceramic powder into the cavity, and a removal step (step S24) of removing the cutter blade 1 from the mold.

[0050] First, as shown in step S21 of Fig. 11, in an insert member preparation step, an insert member 140 is prepared. Step S21 is similar to step S11 of Fig. 9. When insert molding is used, the insert member 140 is preferably made of a material containing metal.

[0051] Next, as shown in step S22, in the insert member placement step, the insert member 140 is placed in the cavity of the mold.

[0052] Next, as shown in step S23, in the insert molding step, the cavity of the mold in which the insert member 140 is placed is filled with and solidified with a material containing at least one of molten resin, molten metal, and ceramic powder. This completes the insert molding. By insert molding, the insert member 140 is supported by sandwiching the insertion portion 130, and the main body portion 110 containing at least one of resin, metal, and ceramic as a material is molded.

[0053] Next, as shown in step S24, in the removal step, the cutter blade 1 equipped with the insert member 140 and the main body portion 110 is removed from the mold. In this manner, the cutter blade 1 can be manufactured.

[0054] Next, before describing the effects of this embodiment, a comparative example will be described, and then the effects of this embodiment will be described in comparison with the comparative example.

[0055] (Comparative Example) For example, in a cutter blade as disclosed in Patent Document 1, as a comparative example, it is considered that the hardened layer is joined by brazing in order to improve the durability of the cutting edge. However, brazing requires heating at a temperature of about 1000°C, which causes deformation of the cutting edge. In order to correct the deformation of the cutting edge, additional machining is required, which increases the manufacturing cost.

[0056] In addition, brazing must be performed in a furnace, and the entire process cannot be observed by the worker. Therefore, the worker cannot directly control the quality of the brazed parts, and it is difficult to control the brazing yield.

[0057] Furthermore, since the hardened layer worn away by wear cannot be replaced, the cutter blade must be discarded after a certain period of use, which increases the manufacturing cost.

[0058] Next, the effects of this embodiment will be described. The cutter blade 1 of this embodiment supports the insert member 140 by sandwiching it between the main body portion 110. Therefore, since there is no need to heat it at a high temperature as in brazing, it is possible to suppress deformation of the insert member 140 and the main body portion 110. As a result, additional machining is not required to correct deformation of the insert member 140 and the main body portion 110, and therefore manufacturing costs can be significantly reduced.

[0059] When the main body 110 contains resin as a material, it is possible to reduce the weight of the cutter blade 1. This makes it possible to reduce the power consumed during operation of the granulator.

[0060] When the insert member 140 is placed in a cavity of a mold and the cutter blade 1 is manufactured by insert molding, the manufacturing cost can be reduced because an inexpensive resin is used as the raw material.

[0061] The sliding surface 120a of the cutting edge portion 120 and the bottom surface 111a of the main body portion 110 may be located on the same plane. This allows the cutter blade 1 to slide without resistance when sliding on the plate surface 204. Furthermore, alignment can be easily performed when attaching the insert member 140 to the main body portion 110. For example, the main body portion 110 and the insert member 140 can be placed and attached on a flat surface. Furthermore, in the case of insert molding, alignment of the insert member 140 is facilitated when it is placed in the cavity of a mold.

[0062] A groove 114 may be formed in the main body 110 from the attachment portion 111 to the ridge 115, and the insertion portion 130 may be sandwiched between the attachment portion 111 and the ridge 115. This can strengthen the support of the insert member 140. Also, since the insert member is supported by sandwiching the first surface 130a and the second surface 130b of the insertion portion 130, the support of the insert member 140 can be strengthened. The edge surface 130e of the insertion portion 130 contacts the bottom surface of the groove 114 of the main body 110. This can also strengthen the support of the insert member 140.

[0063] (Embodiment 2) Next, a cutter blade according to a second embodiment will be described. The cutter blade according to this embodiment differs from that according to the first embodiment in the shape of the insertion portion of the insert member. FIG. 12 is a perspective view illustrating the cutter blade 2 according to the second embodiment. FIG. 13 is an exploded perspective view illustrating the cutter blade 2 according to the second embodiment. As shown in FIGS. 12 and 13, the cutter blade 2 according to this embodiment includes a main body portion 210 and an insert member 240.

[0064] <Main body> The main body 210 has an attachment portion 211 and a ridge portion 215. The attachment portion 211 and the ridge portion 215 are adjacent to each other in the Y-axis direction and connected to each other. The attachment portion 211 is formed, for example, on a portion of the main body 210 on the -Y-axis direction side. The attachment portion 211 is, for example, in the shape of a rectangular prism, and has a bottom surface 211a, an upper surface 211b, a front surface 211c, and a rear surface 211f. The attachment portion 211 is formed with a hole 213 for connecting to the cutter blade holder portion 202. Unlike the first embodiment, the attachment portion 211 does not have a groove for holding the insert member 240. That is, the front surface 211c and the end surface 211g do not have a groove.

[0065] The ridge portion 215 is formed, for example, in a portion on the +Y-axis direction side of the main body portion 210. Therefore, the ridge portion 215 is connected to the +Y-axis direction side of the attachment portion 211. The ridge portion 215 has an upper surface 215b, a front surface 215c, a recessed surface 215e, and a rear surface 215f. A groove 214 for holding the insert member 240 is formed in the front surface 215c. The groove 214 extends in the Y-axis direction in the front surface 215c. That is, the opening of the groove 214 in the front surface 215c extends in the Y-axis direction. The groove 214 is formed in the +X-axis direction from the opening in the front surface 215c. The bottom of the groove 214 faces the rear surface 215f. Thus, in this embodiment, the groove 214 is formed in the front surface 215c of the ridge portion 215. In addition, the groove 214 does not have to be formed in the end surface 215g of the ridge portion 215.

[0066] The insert member 240 includes a cutting edge portion 220 and an insertion portion 230. The cutting edge portion 220 has a sliding surface 220a, an inclined surface 220c, a connecting surface 220d, and a recessed surface 220e. The insertion portion 230 has a first surface 230a, a second surface 230b, a connecting surface 230d, and an edge surface 230e. The insertion portion 230 of this embodiment is located in the groove 214 of the ridge portion 215. Unlike the first embodiment, the insertion portion 230 does not extend to the attachment portion 211. The other configurations of the cutter blade 2 of this embodiment are the same as those of the first embodiment. In addition, the manufacturing method of the cutter blade 2 of this embodiment is the same as that of the first embodiment, except that the shapes of the groove 214 and the insertion portion 230 are different.

[0067] According to the cutter blade 2 of this embodiment, the insertion portion 230 can be made small, and therefore the manufacturing cost can be reduced when a metal such as TiC cermet is used for the insertion portion 230. In addition, the cutter blade 2 can be made even lighter, and power consumption can be reduced.

[0068] (Embodiment 3) Next, a cutter blade according to a third embodiment will be described. The cutter blade according to this embodiment differs from the first and second embodiments in the shape of the cutting edge of the insert member. Fig. 14 is a perspective view illustrating the cutter blade 3 according to the third embodiment. Fig. 15 is an exploded perspective view illustrating the cutter blade 3 according to the third embodiment. As shown in Figs. 14 and 15, the cutter blade 3 according to this embodiment includes a main body 310 and an insert member 340.

[0069] <Main body> The main body 310 has an attachment portion 311 and a ridge portion 315. The attachment portion 311 and the ridge portion 315 are adjacent to each other in the Y-axis direction and connected to each other. The attachment portion 311 is formed, for example, on a portion of the main body 310 in the -Y-axis direction. The attachment portion 311 is, for example, in the shape of a rectangular prism, and has a bottom surface 311a, an upper surface 311b, a front surface 311c, and a rear surface 311f. The attachment portion 311 is formed with a hole 313 for connecting to the cutter blade holder portion 202. Unlike the first embodiment, the attachment portion 311 does not have a groove for holding the insert member 340. That is, the front surface 311c and the end surface 311g do not have a groove.

[0070] The ridge 315 is formed, for example, on the +Y-axis direction side of the main body 310. Therefore, the ridge 315 is connected to the +Y-axis direction side of the attachment portion 311. The ridge 315 has an upper surface 315b, a front surface 315c, a lower surface 315h, and a rear surface 315f. Unlike the first and second embodiments, the ridge 315 does not have a groove for holding the insert member 240. Therefore, the front surface 315c and the end surface 315g of the ridge 315 do not have a groove. Also, unlike the first and second embodiments, the ridge 315 does not have a recessed surface, but has a lower surface 315h. And, a step surface 316 is formed on the lower surface 315h.

[0071] Step surface 316 is recessed toward the +Z axis direction relative to lower surface 315h. Lower surface 315h surrounds step surface 316 in a U-shape with an open -X axis direction side. Lower surface 315h extends in the X axis direction on the +Y axis direction side of step surface 316, extends in the Y axis direction on the +X axis direction side of step surface 316, and extends in the X axis direction on the -Y axis side of step surface 316.

[0072] The insert member 340 includes a cutting edge portion 320 and an insertion portion 330. The cutting edge portion 320 has a sliding surface 220a, an inclined surface 320c, a connecting surface 320d, and a recessed surface 320e. The insertion portion 330 has a first surface 330a, a second surface 330b, a connecting surface 330d, and an edge surface 330e. In this embodiment, the second surface 330b of the insertion portion 330 contacts the step surface 316 of the ridge portion 315. For example, the second surface 330b of the insertion portion 330 may be joined to the step surface 316 of the ridge portion 315. In addition, the step on the +Y axis direction side and the step on the -Y axis direction side of the ridge portion 315 may sandwich the insertion portion 330 in the Y axis direction. Therefore, the main body portion 310 supports the insert member 340 by sandwiching the insertion portion 330 in the Y axis direction.

[0073] Other configurations of the cutter blade 3 in this embodiment are similar to those in embodiments 1 and 2. In addition, the manufacturing method of the cutter blade 3 in this embodiment is similar to that of embodiments 1 and 2, except that the shapes of the ridge portion 315, the cutting edge portion 320, and the insertion portion 330 are different.

[0074] According to the cutter blade 3 of this embodiment, the cutting edge 320 can be made small, and therefore the manufacturing cost can be reduced when a metal such as TiC cermet is used for the cutting edge 320. In addition, the cutter blade 3 can be made even lighter, and power consumption can be reduced.

[0075] The invention made by the inventor has been specifically described above based on an embodiment, but it goes without saying that the present invention is not limited to the above embodiment and can be modified in various ways without departing from the gist of the invention. [Explanation of symbols]

[0076] 1, 2, 3 Cutter blade 110, 210, 310 Main unit 111, 211, 311 Mounting part 111a, 211a, 311a bottom 111b, 211b, 311b top surface 111c, 211c, 311c front 111f, 211f, 311f rear 111g, 211g, 311g end face 113, 213,313 holes 114, 214 groove 115, 215, 315 Minebe 115b, 215b, 315b top surface 115c, 215c, 315c front 115e, 215e Recessed surface 115f, 215f, 315f rear 115g, 215g, 315g end face 120, 220, 320 Cutting edge 120a, 220a, 320a sliding surface 120c, 220c, 320c slope 120d, 220d, 320d connection surface 120e, 220e, 320e recessed surface 130, 230, 330 Insertion part 130a, 230a, 330a 1st page 130b, 230b, 330b 2nd side 130d, 230d, 330d connection surface 130e, 230e, 330e edge surface 133 holes 140, 240, 340 Insert material 100 Extrusion device 101 Drive unit 102 Reducer 103 Cylinder 104 Screw 200 Underwater granulation equipment 201 Die Plate 202 Cutter blade holder 203 Drive unit 204 Plate surface 205 holes 206 Material 315h bottom surface 316 Step surface

Claims

1. an insert member including a cutting edge portion that slides along a plate surface of a die plate having a plate surface in which holes are formed, thereby cutting a material extruded onto the plate surface from the holes, and an insert portion that has a first surface and a second surface opposite to the first surface and is connected to the cutting edge portion; a main body portion that supports the insert member by sandwiching the first surface and the second surface; Equipped with The cutting edge portion has a sliding surface that slides on the plate surface, The main body has a bottom surface that is flush with the sliding surface. Cutter blade.

2. The insert member includes a metal as a material, The main body includes at least one of a resin, a metal, and a ceramic as a material. The cutter blade of claim 1 .

3. The insertion portion has an edge surface connected to a periphery of the first surface and a periphery of the second surface, and the edge surface facing a portion of the insertion portion to which the cutting edge portion is connected contacts the main body portion. A cutter blade according to claim 1 or 2.

4. The insert member is replaceable with respect to the main body portion. A cutter blade according to any one of claims 1 to 3.

5. an insert member including a cutting edge portion that slides along a plate surface of a die plate having holes formed therein to cut a material extruded onto the plate surface from the holes, and an insert portion connected to the cutting edge portion, the insert member including a metal as a material; a main body portion that supports the insert member by sandwiching the insertion portion and that includes at least one of a resin, a metal, and a ceramic as a material; Equipped with The cutting edge portion has a sliding surface that slides on the plate surface, The main body has a bottom surface that is flush with the sliding surface. Cutter blade.

6. The main body portion is a mounting portion connected to a cutter blade holder portion that transmits power for sliding along the plate surface; A ridge portion in contact with the cutting edge portion; having The bottom surface of the mounting portion is located on the same plane as the sliding surface. A cutter blade according to any one of claims 1 to 5.

7. The ridge portion and the attachment portion have a groove that sandwiches the insertion portion. The cutter blade according to claim 6.

8. A cutter blade according to any one of claims 1 to 7; a cutter blade holder portion to which the cutter blade is connected; The die plate; A granulating device equipped with the above structure.

9. an insert member preparation step of preparing an insert member including a cutting edge portion that slides along a plate surface of a die plate having a plate surface in which holes are formed, thereby cutting a material extruded onto the plate surface from the holes, and an insertion portion that has a first surface and a second surface opposite to the first surface and is connected to the cutting edge portion; a main body preparation step of preparing a main body; a mounting step of mounting the insert member to the main body portion so as to support the insert member by sandwiching the first surface and the second surface; Equipped with The cutting edge portion has a sliding surface that slides on the plate surface, The main body has a bottom surface that is flush with the sliding surface. A method for manufacturing a cutter blade.

10. The insert member includes a metal as a material, The main body is made of a material including at least one of resin, metal, and ceramic. A method for manufacturing a cutter blade according to claim 9.

11. The insertion portion has an edge surface connected to a periphery of the first surface and a periphery of the second surface, and the edge surface facing a portion of the insertion portion to which the cutting edge portion is connected is in contact with the main body portion. The method for manufacturing a cutter blade according to claim 9 or 10.

12. The insert member is replaceable relative to the body portion. The method for manufacturing a cutter blade according to any one of claims 9 to 11.

13. The main body portion is a mounting portion connected to a cutter blade holder portion that transmits power for sliding along the plate surface; A ridge portion in contact with the cutting edge portion; and The bottom surface of the mounting portion is positioned on the same plane as the sliding surface. The method for manufacturing a cutter blade according to any one of claims 9 to 12.

14. an insert member preparation step of preparing an insert member including a cutting edge portion that slides along a plate surface of a die plate having holes formed therein to cut a material extruded onto the plate surface from the holes, and an insertion portion connected to the cutting edge portion, the insert member including a metal as a material; an insert member placement step of placing the insert member in a cavity of a mold; an insert molding step of filling and solidifying a material including at least one of molten resin, molten metal, and ceramic powder into the cavity to support the insert member by sandwiching the insertion portion, and molding a main body including at least one of resin, metal, and ceramic as a material; a removal step of removing the cutter blade including the insert member and the main body portion from the mold; A method for manufacturing a cutter blade comprising the steps of:

15. The cutting edge portion has a sliding surface that slides on the plate surface. A method for manufacturing a cutter blade according to claim 14.

16. The main body has a bottom surface that is flush with the sliding surface, The main body portion is a mounting portion connected to a cutter blade holder portion that transmits power for sliding along the plate surface; A ridge portion in contact with the cutting edge portion; and The bottom surface of the mounting portion is positioned on the same plane as the sliding surface. A method for manufacturing a cutter blade according to claim 15.

17. The ridge portion and the attachment portion have a groove that sandwiches the insertion portion. A method for manufacturing a cutter blade according to claim 13 or 16.

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