Cutting blade and method for manufacturing a cutting blade

Abstract

A cutting blade and a method for manufacturing the cutting blade that can reduce manufacturing costs are provided. The cutting blade according to an embodiment includes a blade tip configured to slide along a plate surface of a template having a hole formed therein to cut a plurality of pieces of material extruded onto the plate surface from the hole, and a base metal portion to which the blade tip is adhered by an adhesive. The blade tip can be adhered to the base metal portion in such a manner that the blade tip can be replaced with a new blade tip.

Description

Technical Field

[0001] This invention relates to a cutting blade and a method for manufacturing the cutting blade. Background Technology

[0002] Patent document 1 discloses a cutting blade for cutting resin material extruded from a hole formed in a template.

[0003] Reference List

[0004] Patent documents

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. H11-165316.

[0006] When using the cutting blade disclosed in Patent Document 1, it is conceivable to bond the hardened layer to the cutting blade by brazing to improve the durability of its tip. However, since the cutting blade needs to be heated to approximately 1000°C for brazing, its tip will deform. The manufacturing cost increases because additional machining is required to correct the deformation of the tip. Summary of the Invention

[0007] Other problems to be solved and novel features will become apparent from the description in this specification and the accompanying drawings.

[0008] Solution to the problem

[0009] According to one embodiment, the cutting blade includes: a blade tip configured to slide along a perforated plate surface of a template and thus cut material extruded from the perforation onto the plate surface; and a base metal portion in contact with the blade tip.

[0010] A method for manufacturing a cutting blade according to one embodiment includes: a blade tip preparation step: preparing a blade tip configured to slide along a perforated plate surface of a template, whereby the blade tip cuts material extruded from the perforation onto the plate surface; a base metal part preparation step: preparing a base metal part; and an adhesive step: adhesively bonding the blade tip to the base metal part using an adhesive.

[0011] Beneficial effects of the present invention

[0012] According to the above embodiments, a cutting blade capable of reducing manufacturing costs and a method for manufacturing the cutting blade can be provided. Attached Figure Description

[0013] Figure 1 This is a structural diagram illustrating an example of an underwater granulation apparatus using a cutting blade according to a first embodiment;

[0014] Figure 2This is a perspective view showing an example of a template in an underwater granulation apparatus using a cutting blade according to a first embodiment;

[0015] Figure 3 This is a perspective view showing an example of a cutting blade according to the first embodiment;

[0016] Figure 4 This is a side view showing an example of a cutting blade according to the first embodiment;

[0017] Figure 5 This is a side view showing another example of the cutting blade according to the first embodiment;

[0018] Figure 6 This is a flowchart illustrating an example of a method for manufacturing a cutting blade according to a first embodiment; and

[0019] Figure 7 This is a side view showing an example of a cutting blade according to a first variant of the first embodiment. Detailed Implementation

[0020] For clarity, the following descriptions and figures have been appropriately omitted and simplified. Furthermore, in all figures, the same reference numerals are assigned to the same or corresponding parts, and redundant descriptions are appropriately omitted.

[0021] (First Embodiment)

[0022] The cutting blade according to the first embodiment and the method for manufacturing the cutting blade will be described. First, an underwater granulation apparatus will be described as an example of a device using the cutting blade. Thereafter, the cutting blade and the method for manufacturing the cutting blade will be described.

[0023] Underwater granulation device

[0024] Figure 1 This is a structural diagram illustrating an example of an underwater granulation apparatus using a cutting blade according to a first embodiment. Figure 2 This is a perspective view showing an example of a template in an underwater granulation apparatus using a cutting blade according to a first embodiment. Figure 1 An exploded view of a portion of the underwater granulation device is shown within the frame.

[0025] like Figure 1 and Figure 2 As shown, 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 barrel 103, and a screw 104. The drive unit 101, for example a motor, transmits its rotation, regulated by the reducer 102, to the screw 104. Thus, the screw 104 rotates within the barrel 103 by the regulated power source of the drive unit 101.

[0026] Material 206, fed from a predetermined portion of cylinder 103 into cylinder 103, is extruded through a rotating screw 104 to the underwater granulation apparatus 200. The conveyed material 206 is, for example, a resin material. The extrusion apparatus 100, for example, plasticizes and mixes the resin material by heating it within cylinder 103 and by rotating the screw 104, and extrudes the plasticized and mixed resin material as molten resin into the underwater granulation apparatus 200.

[0027] The underwater granulation apparatus 200 includes a template 201, a cutting edge holder 202, and a drive unit 203. The template 201 and the cutting edge holder 202 are disposed underwater. The template 201 has a plate surface 204. A plurality of holes 205 are formed in the plate surface 204. Material 206 extruded by a rotating screw 104 is extruded from the holes 205 formed in the plate surface 204 onto the plate surface 204. The material 206 extruded onto the plate surface 204 is, for example, molten resin. Figure 2 In order to simplify the accompanying drawings, only some of the holes 205 and some of the material 206 extruded from them are indicated by reference numerals.

[0028] Template 201 and plate surface 204 have a central axis C. A cutting blade holder 202 is positioned opposite to template 201. The cutting blade holder 202 rotates about the central axis C via a power source from drive unit 203. The cutting blade holder 202 holds a plurality of cutting blades 1. Figure 1 In order to simplify the accompanying drawings, only some of the cutting edges 1 are indicated by reference numerals.

[0029] For example, the cutting blades 1 are held (i.e. positioned) at equal intervals on the periphery of the circular cutting blade holder 202. Furthermore, as the cutting blade holder 202 rotates, each cutting blade 1 slides on the plate surface 204. As a result, the cutting blades 1 cut multiple pieces of material 206 extruded from the holes 205 onto the plate surface 204. For example, multiple pieces of molten resin extruded from the holes 205 onto the plate surface 204 are cut by the cutting blades 1. The multiple cut pieces of molten resin solidify underwater and become resin particles.

[0030] <Cutting blade>

[0031] Next, the cutting edge 1 will be described. Figure 3 This is a perspective view showing an example of the cutting blade 1 according to the first embodiment. Figure 4 This is a side view showing an example of the cutting blade 1 according to the first embodiment. (See attached image.) Figure 3 and 4 As shown, the cutting blade 1 includes a base metal portion 10 and a blade tip 20. The blade tip 20 is bonded to the base metal portion 10 by an adhesive.

[0032] It is important to note that an XYZ orthogonal axis system is introduced to explain the cutting edge 1. With the cutting edge 1 placed on the plate surface 204, the direction perpendicular to the plate surface 204 is defined as the Z-axis direction. The direction in which the blade tip extends is defined as the Y-axis direction. The direction perpendicular to both the Y-axis and Z-axis directions is defined as the X-axis direction.

[0033] <Base metal part>

[0034] The base metal portion 10 includes a mounting portion 11 and a peak portion 12. The mounting portion 11 and the peak portion 12 are connected to each other in the Y-axis direction. As its material, the base metal portion 10 includes, for example, stainless steel. Note that the material of the base metal portion 10 is not limited to materials containing stainless steel, but may include other metals, ceramics, plastics, etc.

[0035] The mounting portion 11 is connected to the cutting blade holding portion 202, which transmits power to slide the cutting blade 1 along the plate surface 204. The mounting portion 11 is formed, for example, on a portion of the base metal portion 10 in the +Y axis direction. The mounting portion 11 has, for example, a quadrangular prism shape and has a lower surface 11a and an upper surface 11b. The lower surface 11a is the surface in the -Z axis direction, and the upper surface 11b is the surface in the +Z axis direction.

[0036] A hole 13 is formed in the mounting portion 11 for connecting the mounting portion 11 to the cutting edge retaining portion 202. The number of holes 13 may be only one or more. The hole 13 extends from the upper surface 11b to the lower surface 11a. For example, the cutting edge 1 is fixed to the cutting edge retaining portion 202 by inserting a bolt into the hole 13 in the mounting portion 11 and the hole formed in the cutting edge retaining portion 202. Note that instead of the hole 13, a groove or similar structure may be formed in the mounting portion 11, as long as it can be used to connect the mounting portion 11 to the cutting edge retaining portion 202.

[0037] The peak 12 faces the plate surface 204, with the cutting edge 20 positioned between them. The cutting edge 20 is bonded to the peak 12. The peak 12 is, for example, formed on the Y-axis side of the base metal portion 10. The peak 12 extends, for example, in the Y-axis direction. The peak 12 has an upper surface 12b, an inclined surface 12c, an adhesive surface 12d, a recessed surface 12e, and a rear surface 12f. The peak 12 has a cylindrical shape extending in the Y-axis direction, wherein the upper surface 12b, the inclined surface 12c, the adhesive surface 12d, the recessed surface 12e, and the rear surface 12f are its outer peripheral surfaces.

[0038] The upper surface 12b is flush with the upper surface 11b of the mounting portion 11, for example. The inclined surface 12c is inclined relative to the upper surface 12b. The angle between the upper surface 12b and the inclined surface 12c is, for example, 135 degrees. Therefore, the angle between the inclined surface 12c and the plane extending from the upper surface 12b (i.e., parallel to the upper surface 12b) is 45°.

[0039] The bonding surface 12d faces the -Z axis direction. The bonding surface 12d is the surface to be bonded to the cutting edge tip 20. The bonding surface 12d of the peak 12 is shaped such that it engages with the bonding surface 20d of the cutting edge tip 20. For example, the bonding surface 12d of the peak 12 has a convex shape. Specifically, the cross-section of the bonding surface 12d perpendicular to the Y-axis direction is convex. In this case, the cross-section of the bonding surface 20d of the cutting edge tip 20 perpendicular to the Y-axis direction is concave.

[0040] Note that the bonding surface 12d of the peak 12 can be concave, and the bonding surface 20d of the tip 20 can be convex. Alternatively, both the bonding surface 12d of the peak 12 and the bonding surface 20d of the tip 20 can be planar (i.e., flat), such as... Figure 5 As shown. When both the adhesive surface 12d of the peak 12 and the adhesive surface 20d of the cutting edge 20 are planar (i.e., flat), the adhesive surfaces 12d and 20d can be parallel to the lower surface 11a, or they can be inclined relative to the lower surface 11a. For example, the adhesive surfaces 12d and 20d can be perpendicular to the inclined surface 12c.

[0041] The bonding surface 12d can have a surface roughness within a certain microscopic height (Rz: 5 to 30 μm). As a result, the adhesive strength can be improved.

[0042] The cut surface 12e is the surface opposite to the upper surface 12b and the inclined surface 12c. For example, the cut surface 12e is curved into a concave shape. The cut surface 12e is smoothly connected to the cut surface 20e. The rear surface 12f faces the +X axis direction.

[0043] <Blade tip>

[0044] The cutting edge 20 is a portion that slides on the plate surface 204. The cutting edge 20 slides along the plate surface 204 of the template 201, which has holes 205 formed therein, thereby cutting multiple pieces of material 206 extruded from the holes 205 onto the plate surface 204. As its material, the cutting edge 20 includes, for example, a hardened layer, such as TiC cermet. Note that the material of the cutting edge 20 is not limited to materials containing TiC cermet, but may include other metals, ceramics, plastics, etc.

[0045] The cutting edge 20 is bonded to the base metal portion 10 using an adhesive. The adhesive is, for example, an epoxy adhesive. Preferably, the adhesive is one that can be easily peeled off when heated to a predetermined temperature. In this way, the cutting edge 20 bonded to the base metal portion 10 can be replaced with a new cutting edge.

[0046] The cutting edge 20 extends, for example, in the Y-axis direction. The cutting edge 20 includes a sliding surface 20a, an inclined surface 20c, an adhesive surface 20d, and a digging surface 20e. The cutting edge 20 has, for example, a cylindrical shape extending along the Y-axis direction, and the sliding surface 20a, the inclined surface 20c, the adhesive surface 20d, and the digging surface 20e are its outer peripheral surfaces.

[0047] The sliding surface 20a slides on the plate surface 204. As the sliding surface 20a slides on the plate surface 204, multiple pieces of material 206 extruded from the hole 205 onto the plate surface 204 are cut off by the cutting edge. The sliding surface 20a is shaped to conform to the shape of the plate surface 204, allowing it to slide on the plate surface 204. If the plate surface 204 is planar (i.e., flat), the sliding surface 20a is also planar (i.e., flat). If the cross-section of the plate surface 204 perpendicular to the X-axis is curved, the cross-section of the sliding surface 20a perpendicular to the X-axis can also be curved in accordance with the curvature of the plate surface 204.

[0048] When the sliding surface 20a is flat, it can be flush with the lower surface 11a of the mounting portion 11 in the base metal part 10. Therefore, the base metal part 10 has a lower surface 11a that is flush with the sliding surface 20a. As a result, when the tip of the cutting edge 20 is bonded to the base metal part 10, the tip of the cutting edge 20 can be easily aligned with the base metal part 10.

[0049] The inclined surface 20c is inclined relative to the sliding surface 20a. For example, the inclined surface 20c is inclined at 45° relative to the sliding surface 20a. The cutting tip is formed by the sliding surface 20a and the inclined surface 20c. That is, the angle between the sliding surface 20a and the inclined surface 20c forms the cutting tip. The cutting tip extends along the Y-axis direction. The inclined surface 20c is flush with the inclined surface 12c. Therefore, the multiple pieces of material 206 cut by the cutting tip move smoothly on the inclined surfaces 20c and 12c. Therefore, damage to the cut pieces of material 206 can be prevented.

[0050] The adhesive surface 20d is the surface opposite to the sliding surface 20a. The adhesive surface 20d is the surface bonded to the base metal portion 10. The adhesive surface 20d is bonded to the adhesive surface 12d of the peak portion 12. The adhesive surface 20d of the cutting edge tip 20 is shaped to engage with the adhesive surface 12d of the peak portion 12. For example, the adhesive surface 20d of the cutting edge tip 20 has a concave shape. Specifically, the cross-section of the adhesive surface 20d of the cutting edge tip 20 perpendicular to the Y-axis direction is concave. In this case, the cross-section of the adhesive surface 12d of the peak portion 12 perpendicular to the Y-axis direction is also convex.

[0051] Alternatively, as described above, the adhesive surface 12d of the peak 12 may have a concave shape, and the adhesive surface 20d of the tip of the blade 20 may have a convex shape, or both the adhesive surface 12d of the peak 12 and the adhesive surface 20d of the tip of the blade 20 may be planar (i.e. flat).

[0052] The bonding surface 20d can have a surface roughness within a certain microscopic height (Rz: 5 to 30 μm). As a result, the adhesive strength can be improved.

[0053] The cut-in surface 20e is the surface opposite to the inclined surface 20c. For example, the cut-in surface 20e is curved into a concave shape. The cut-in surface 20e is smoothly connected to the cut-in surface 12e.

[0054] <Methods for manufacturing cutting blades>

[0055] The method for manufacturing the cutting blade 1 of this embodiment will then be described. Figure 6 This is a flowchart illustrating an example of a method for manufacturing a cutting blade 1 according to a first embodiment.

[0056] like Figure 6 As shown, the method for manufacturing the cutting edge 1 includes a blade tip preparation step (step S11), a base metal part preparation step (step S12), and an bonding step (step S13). Note that the order of the blade tip preparation step and the base metal part preparation step can be interchanged. That is, the base metal part preparation step can be performed in step S11, and the blade tip preparation step can be performed in step S12.

[0057] First, as shown in step S11, the blade tip 20 is prepared in the blade tip preparation step. The blade tip 20 slides along the plate surface 204 of the template 201, the plate surface 204 having holes 205 formed therein, thereby cutting multiple pieces of material 206 extruded from the holes 205 onto the plate surface 204. In the blade tip preparation step, the blade tip 20 may have a sliding surface 20a that slides on the plate surface 204.

[0058] In the preparation step of the cutting edge tip, the bonding surface 20d of the cutting edge tip 20 can have a surface roughness within a certain microscopic height (Rz: 5 to 30 μm). In addition, in the preparation step of the cutting edge tip, the bonding surface 20d of the cutting edge tip 20 to be engaged with the peak portion 12 can have a concave shape.

[0059] Then, as shown in step S12, the base metal part 10 is prepared in the base metal part preparation step. In the base metal part preparation step, the base metal part 10 may have a lower surface 11a. Furthermore, in the base metal part preparation step, the base metal part 10 may have a mounting part 11 and a peak part 12. The mounting part 11 is connected to the cutting blade holding part 202, which transmits power for sliding the blade tip 20 along the plate surface 204. The peak part 12 faces the plate surface 204, and the blade tip 20 is inserted therebetween. The blade tip 20 is adhered to the peak part 12.

[0060] In the base metal preparation step, the bonding surface 12d of the peak component 12 may have a surface roughness within a certain microscopic height (Rz: 5 to 30 μm). Furthermore, in the base metal preparation step, the bonding surface 12d of the peak 12 to be engaged with the cutting edge tip 20 may have a convex shape.

[0061] Next, as shown in step S13, the cutting edge 20 is bonded to the base metal portion 10 using an adhesive in the bonding step. For example, the cutting edge 20 is bonded to the base metal portion 10 at room temperature using an adhesive. In the bonding step, the cutting edge 20 can be bonded to the base metal portion 10 in such a way that the cutting edge 20 can be replaced with a new cutting edge. Furthermore, in the bonding step, the sliding surface 20a can be bonded to the lower surface 11a of the base metal portion 10, making them flush with each other. Specifically, in the bonding step, the sliding surface 20a can be bonded to the lower surface 11a of the mounting portion 11, making them flush with each other. Through the above process, the cutting blade 1 can be manufactured.

[0062] Next, before explaining the effects of the above embodiments, a comparative example will be described. Thereafter, the beneficial effects of the above embodiments will be described, and they will be compared with the effects of the comparative example.

[0063] (Comparative Example)

[0064] For example, as a comparative example, in the case of the cutting blade disclosed in Patent Document 1, it is conceivable to improve the durability of its cutting tip by brazing the hardened layer to the cutting blade. However, since the cutting blade needs to be heated to about 1000°C for brazing, its cutting tip deforms. Because additional machining is required to correct the deformation of the cutting tip, the manufacturing cost increases.

[0065] Furthermore, because brazing must be carried out in a furnace, workers cannot witness the entire process. Therefore, no direct work related to the quality of the brazed parts can be performed, making it difficult to control the yield rate of brazed parts.

[0066] Furthermore, since the hardened layer of the copper solder does not peel off even when heated to high temperatures, the hardened layer, worn down by friction, cannot be replaced. Therefore, the cutting edge must be scrapped after a period of use, thus increasing manufacturing costs.

[0067] The effects of this embodiment will then be explained. In the cutting blade 1 according to this embodiment, the blade tip 20 is bonded to the base metal portion 10 using an adhesive. Therefore, it is not necessary to heat the blade tip 20 and the base metal portion 10 (which is necessary in the case of brazing), thereby preventing them from deforming. As a result, no additional machining is required, which would otherwise be necessary to correct the deformation of the blade tip 20 and the base metal portion 10, thereby significantly reducing manufacturing costs.

[0068] Workers performing the bonding operation between the blade tip 20 and the base metal part 10 can directly observe the operation while performing the bonding. Therefore, quality control can be implemented, thereby improving the yield rate.

[0069] The blade tip 20, bonded by adhesive, can be easily peeled off from the base metal portion 10, for example, by heating them to a predetermined temperature. Therefore, the blade tip 20 worn due to friction or the like can be easily replaced at low cost, while the base metal portion 10 can be reused.

[0070] The sliding surface 20a of the cutting edge 20 and the lower surface 11a of the base metal portion 10 are flush with each other. Therefore, when the cutting edge 20 is bonded to the peak portion 12, the cutting edge 20 can be easily aligned with the peak portion 12. For example, the base metal portion 10 and the cutting edge 20 can be aligned with each other on a flat surface and can be bonded to each other.

[0071] At least one of the adhesive surface 12d of the peak 12 and the adhesive surface 20d of the cutting edge 20 has a surface roughness within a certain microscopic height (Rz: 5 to 30 μm). As a result, the adhesion of the adhesive to the adhesive surfaces 12d and 20d can be improved. In addition, the contact area can be increased, thereby improving the adhesive strength between the adhesive surfaces 12d and 20d.

[0072] By shaping one of the adhesive surface 20d at the tip 20 and the adhesive surface 12d at the peak 12 into a convex shape and the other into a concave shape, the contact area can be increased, thereby improving the adhesive strength. Furthermore, the bonding strength between these adhesive surfaces can be improved by joining the concave adhesive surface with the convex adhesive surface.

[0073] By shaping the adhesive surface 20d of the tip 20 into a concave shape and the adhesive surface 12d of the peak 12 into a convex shape, the adhesive applied to the adhesive surface 20d can be easily retained during bonding. For example, when the tip 20 is bonded to the peak 12, adhesive can be prevented from overflowing from the concave shape of the adhesive surface 20d.

[0074] (First variant example)

[0075] Next, a first variation of the first embodiment will be described. In the above embodiment, the cutting edge 20 is bonded to the base metal portion 10 by an adhesive. However, instead of using an adhesive, the cutting edge 20 can be fixed by using a threaded connector or the like. Figure 7 This is a side view showing an example of the cutting blade 1a of a variant of Embodiment 1.

[0076] like Figure 7 As shown, the cutting edge 1a includes a base metal part 10 and a cutting edge tip 20, which is fixed to the peak 12 of the base metal part 10 by a threaded connector 21. For example, the cutting edge tip 20 is fixed by a threaded connector that extends from the cutting face 20e to the peak 12. Note that the fixing by the threaded connector is not limited to a threaded connector that extends from the cutting face 20e to the peak 12, but can be a threaded connector that extends from the cutting face 12e to the cutting edge tip 20 or from the upper surface 12b to the cutting edge tip 20, as long as it can fix the cutting edge tip 20 to the peak 12. Alternatively, a pin can be used instead of the threaded connector 21.

[0077] Therefore, according to this variant, the cutting blade 1a includes a blade tip 20 that slides along the plate surface 204 of the template 201. The plate surface 204 has a hole 205 formed therein, thereby cutting multiple pieces of material 206 extruded from the hole 205 onto the plate surface 204. The cutting blade includes a base metal portion, and the blade tip 20 is fixed to the base metal portion by a threaded connector or a pin. In this case, the adhesive surface 20d of the blade tip 20 and the adhesive surface 12d of the peak 12 can be referred to as (i.e. considered as) contact surfaces.

[0078] Even in the cutting blade 1a according to this variant, the blade tip 20 bonded to the base metal portion 10 can be replaced with a new blade tip. Furthermore, the heat treatment required to peel off the adhesive in the above embodiment for replacing the blade tip 20 with a new blade tip is not necessary. The remaining structure and beneficial effects are the same as described in the first embodiment.

[0079] (Second variant example)

[0080] Next, a second variation of the first embodiment will be described. In the first variation, the cutting edge 20 is fixed to the base metal portion 10 by a threaded connector or the like. In this variation, an adhesive and a threaded connector are used together. Specifically, the cutting edge according to this variation includes the base metal portion 10 and the cutting edge 20, and the cutting edge 20 is fixed to the peak portion 12 of the base metal portion 10 by an adhesive and a threaded connector 21 or the like. Note that a pin can be used instead of the threaded connector 21.

[0081] For example, the adhesive surface 20d of the tip 20 and the adhesive surface 12d of the peak 12 are bonded to each other with an adhesive. Furthermore, the tip 20 is also secured to the base metal portion 10 by a threaded connector or pin. Even in this variant, the tip 20 bonded to the base metal portion 10 can be replaced with a new tip. Moreover, since the adhesive and threaded connector or similar are used in combination, the tip 20 can be firmly secured to the base metal portion 10. The remaining construction and advantageous effects are the same as described in the first embodiment and the first variant.

[0082] The invention described above by the inventors of this application has been specifically illustrated with reference to the embodiments. However, the invention is not limited to the above embodiments, and it is self-evident that various modifications can be made without departing from the spirit and scope of the invention.

[0083] This application is based on and claims priority to Japanese Patent Application No. 2020-210135, filed on December 18, 2020, the disclosure of which is incorporated herein by reference in its entirety.

[0084] List of reference numerals

[0085] 1,1a cutting edge

[0086] 10. Base metal parts

[0087] 11 Installation Department

[0088] 11a Lower surface

[0089] 11b Upper surface

[0090] 12 peaks

[0091] 12b upper surface

[0092] 12c inclined surface

[0093] 12d adhesive surface

[0094] 12e excavation face

[0095] 12f back surface

[0096] 13 holes

[0097] 20 blade top

[0098] 20a Sliding Surface

[0099] 20c inclined surface

[0100] 20d bonding surface

[0101] 20e excavation face

[0102] 21 Threaded fasteners

[0103] 100 Extrusion Unit

[0104] 101 Drive Unit

[0105] 102 Reducer

[0106] 103 tubes

[0107] 104 Threaded fasteners

[0108] 200 Underwater Granulation Unit

[0109] 201 Template

[0110] 202 Cutting edge retainer

[0111] 203 Drive Unit

[0112] 204 stainless steel board surface

[0113] 205 holes

[0114] 206 Materials

Claims

1. A cutting blade, comprising: The blade tip is configured to slide along the perforated plate surface of the template, whereby the blade tip cuts off the material extruded from the perforation onto the plate surface. as well as The base metal portion, the tip of the blade is bonded to the base metal portion by an adhesive. The blade tip has a sliding surface configured to slide on the plate surface, and the base metal portion has a lower surface flush with the sliding surface. The base metal portion includes: a mounting portion configured to connect to a cutting edge holding portion configured to transmit power for sliding the cutting edge along the plate surface; and a peak portion opposite to the plate surface, with the tip of the cutting edge located between the peak portion and the plate surface, the tip of the cutting edge being adhered to the peak portion; and the lower surface of the mounting portion being flush with the sliding surface. Specifically, regarding the adhesive surface between the peak and the tip of the blade, the adhesive surface of the peak has a convex shape, and the adhesive surface of the tip of the blade has a concave shape; alternatively, the adhesive surface of the peak is planar, and the adhesive surface of the tip of the blade is also planar. Specifically, regarding the digging surface between the peak and the top of the blade, the digging surface of the peak is smoothly connected to the digging surface of the top of the blade.

2. The cutting blade according to claim 1, characterized in that, The tip of the blade, which is bonded to the base metal portion, can be replaced.

3. The cutting blade according to claim 1, characterized in that, Regarding the bonding surface between the base metal portion and the tip of the cutting edge, at least one of the bonding surface of the peak portion and the bonding surface of the tip of the cutting edge has a surface roughness with a microscopic height Rz in the range of 5 to 30 μm.

4. The cutting blade according to claim 1 or 2, characterized in that, The tip of the blade is also fixed to the base metal part by a threaded connector or a pin.

5. A method for manufacturing a cutting blade, comprising: (A): Prepare a cutting edge configured to slide along the perforated plate surface of the template, whereby the cutting edge cuts off the material extruded from the perforation onto the plate surface; (B): Prepare the base metal part; as well as (C): The tip of the blade is bonded to the base metal portion using an adhesive. In step (A), the blade tip is prepared such that the blade tip has a sliding surface configured to slide on the plate surface; in step (B), the base metal part is prepared such that the base metal part has a lower surface; and in step (C), the sliding surface is bonded to the lower surface of the base metal part such that the sliding surface is flush with the lower surface. In step (B), the base metal portion is prepared such that it includes: a mounting portion configured to connect to a cutting edge holding portion configured to transmit power for sliding the cutting edge along the plate surface; and a peak portion opposite to the plate surface, with the tip of the cutting edge located between the peak portion and the plate surface, the tip of the cutting edge being adhered to the peak portion; and in step (C), the sliding surface is adhered to the lower surface of the mounting portion such that the sliding surface is flush with the lower surface. In step (A), the adhesive surface where the tip of the blade is bonded to the peak is shaped into a concave shape, and in step (B), the adhesive surface where the peak is bonded to the tip of the blade is shaped into a convex shape; or in step (A), the adhesive surface where the tip of the blade is bonded to the peak is shaped into a planar shape, and in step (B), the adhesive surface where the peak is bonded to the tip of the blade is also shaped into a planar shape. Specifically, regarding the digging surface between the peak and the top of the blade, the digging surface of the peak is smoothly connected to the digging surface of the top of the blade.

6. The method for manufacturing a cutting blade according to claim 5, characterized in that, In step (C), the tip of the blade is bonded to the base metal portion in a manner that allows the tip of the blade to be replaced.

7. The method for manufacturing a cutting blade according to claim 5, characterized in that, In at least one of steps (A) and (B), regarding the bonding surface between the base metal portion and the tip of the cutting edge, at least one of the bonding surface of the peak portion and the bonding surface of the tip of the cutting edge has a surface roughness with a microscopic height Rz in the range of 5 to 30 μm.

8. The method for manufacturing a cutting blade according to claim 5 or 6, characterized in that, In step (C), the tip of the blade is also secured to the base metal part by a threaded connector or a pin.

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