Slot-combined powder metallurgy knife net

Abstract

The utility model discloses a slotted hole combined powder metallurgy knife net which comprises a knife net body, a mixed shaving track is arranged on the net top of the knife net body, and a plurality of semi-open hair inlet grooves penetrating through the net top up and down are formed in the mixed shaving track in the circumferential direction. A plurality of hair inlet holes vertically penetrating through the net top are formed in the same arc-shaped section, corresponding to the semi-open hair inlet grooves, of the mixed shaving track, the peripheries of the hair inlet holes are closed, one end of each semi-open hair inlet groove is provided with a lateral opening, the other end of each semi-open hair inlet groove is a closed end, and the closed ends of the semi-open hair inlet grooves are ended in the middle of the mixed shaving track. The semi-open hair inlet groove is provided with a lateral opening so that medium-long hair can enter the semi-open hair inlet groove to be cut, safety is met, meanwhile, the thickness of a material at the position of a net top corresponding to the mixed shaving track can be better thinned, the shaving cleanliness of the mixed shaving track is improved, and the service life of the mixed shaving track is prolonged. And the skin contact surface on the mixed shaving track can be prevented from being divided into independent surfaces by combining the hair inlet holes with the semi-open hair inlet grooves, so that the skin feeling can be improved.

Description

Technical Field

[0001] The utility model relates to a powder metallurgy cutter net with slot and hole combination.

Background Art

[0002] For the rotary shavers on the current market, the hair inlet structures on the cutter nets generally include two types. One is the hair inlet slot, and the other is the hair inlet hole. The hair inlet slot is generally cut out by a grinding wheel, and usually has an opening on the side to facilitate the introduction of hair. Since the hair inlet area of the hair inlet slot is relatively large, in order to meet safety requirements, the material thickness usually cannot be made too thin. The cutter net usually has two or more shaving tracks inside and outside. After setting the hair inlet slot on the outer shaving track, in order to further improve the performance, circular hair inlet holes will be punched on the inner shaving track. For example, for the cutter net structure disclosed in the patent with the publication number CN101396833A, the material thickness of the net top corresponding to the inner shaving track can be made thinner to improve the shaving cleanliness. Since when punching holes, the holes within a certain small angle range are punched out first, and then rotated to another angle to punch other holes, generally circular holes are punched, and the circular hair inlet holes are generally of the same size, and the interval between the holes is relatively large. And for safety, the size of the holes will also be restricted to prevent the skin from being squeezed in, resulting in very low hair inlet and cutting efficiency in the shaving track with circular hair inlet holes.

[0003] In addition, since the hair inlet slot is cut by a grinding wheel and the hair inlet hole is processed by punching, due to the limitations of the existing process, the two can usually only be set separately. Even if both the hair inlet slot and the hair inlet hole are set in the same shaving track, the hair inlet slot can only be set in the arc section corresponding to a certain circular angle of the shaving track, while the hair inlet hole is set in the arc section corresponding to another central angle of the shaving track, making the synergistic effect between the two relatively low. And since the fixed cutter surface corresponding to the same shaving track must be consistent in the circumferential direction for the moving cutter teeth on the moving cutter to rotate on the fixed cutter surface, the material thickness of the net top corresponding to the hair inlet hole area and the hair inlet slot area on the same shaving track is usually the same, and the more effective shaving effect of the hair inlet hole cannot be effectively exerted.

[0004] The present utility model is made based on this situation.

Content of the Utility Model

[0005] The technical problem to be solved by the present utility model is to provide a powder metallurgy cutter net with a simple structure and slot-hole combination. In the same arc segment of the hybrid shaving track, a hair inlet hole and a semi-open hair inlet groove are mixedly arranged. The semi-open hair inlet groove has a closed end and is relatively short, which has good safety. The semi-open hair inlet groove has a lateral opening to facilitate the entry of medium and long hairs for cutting. While meeting the safety requirements, the material thickness at the net top corresponding to the hybrid shaving track can be made thinner, improving the shaving cleanliness of the hybrid shaving track. Moreover, the combination of the hair inlet hole and the semi-open hair inlet groove can prevent the skin contact surface on the hybrid shaving track from being divided into independent surfaces, improving the skin feel.

[0006] The present utility model is realized through the following technical solutions:

[0007] A powder metallurgy cutter net with a slot-hole combination includes a cutter net body. A hybrid shaving track is provided on the net top of the cutter net body. A plurality of semi-open hair inlet grooves penetrating the net top up and down are arranged around the circumferential direction on the hybrid shaving track. A plurality of hair inlet holes penetrating the net top up and down are arranged in the same arc segment corresponding to the plurality of semi-open hair inlet grooves on the hybrid shaving track. The periphery of the hair inlet hole is closed. One end of the semi-open hair inlet groove has a lateral opening and the other end is a closed end, and its closed end terminates at the middle of the hybrid shaving track.

[0008] For a powder metallurgy cutter net with a slot-hole combination as described above, on the same hybrid shaving track, the semi-open hair inlet groove is an outer hair inlet groove with a lateral opening at the outer end. A plurality of the outer hair inlet grooves are arranged around the circumferential direction on the outer side of the hybrid shaving track, and a plurality of the hair inlet holes are arranged around the circumferential direction inside the outer hair inlet grooves.

[0009] For a powder metallurgy cutter net with a slot-hole combination as described above, on the same hybrid shaving track, the semi-open hair inlet groove includes an outer hair inlet groove with a lateral opening at the outer end and an inner hair inlet groove with a lateral opening at the inner end. A plurality of the outer hair inlet grooves are arranged around the circumferential direction on the outer side of the hybrid shaving track, and a plurality of the inner hair inlet grooves are arranged around the circumferential direction on the inner side of the hybrid shaving track.

[0010] For a powder metallurgy cutter net with a slot-hole combination as described above, a plurality of hair inlet holes arranged around the circumferential direction are spaced between the outer hair inlet groove and the inner hair inlet groove on the hybrid shaving track, and / or hair inlet holes are provided between adjacent two outer hair inlet grooves and / or between adjacent two inner hair inlet grooves on the hybrid shaving track.

[0011] For a powder metallurgy cutter net with a slot-hole combination as described above, the upper ports of the hair inlet hole and the semi-open hair inlet groove are provided with rounded corners, and sharp blades are provided on the hair inlet hole and the semi-open hair inlet groove.

[0012] A powder metallurgy cutter net with slot combination as described above, the closed end of the semi-open inlet hair slot terminates at a position of 1 / 4 to 1 / 2 of the width of the mixed shaving track.

[0013] A powder metallurgy cutter net with slot combination as described above, a shaving track is provided on the mesh top of the cutter net body, the shaving track is located on the outside, the mixed shaving track is located on the inside, a spacing slot is provided between the mixed shaving track and the shaving track and is recessed to separate the two, and the outer inlet hair slot on the mixed shaving track is communicated with the spacing slot through a lateral opening.

[0014] A powder metallurgy cutter net with slot combination as described above, the shaving track is provided with an inlet hair slot having a lateral opening at the outer end and / or the inner end.

[0015] A powder metallurgy cutter net with slot combination as described above, the middle parts of the inlet hair slots on the shaving track are bent in the same direction.

[0016] A powder metallurgy cutter net with slot combination as described above, the semi-open inlet hair slot and the inlet hair pore are integrally formed with the cutter net body by powder metallurgy.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] 1. In the utility model, the semi-open inlet hair slot has a closed end and is relatively short, which has good safety. And the semi-open inlet hair slot has a lateral opening to facilitate the entry of medium and long hairs for cutting. The inlet hair pore and the semi-open inlet hair slot are mixedly arranged within the same arc segment on the mixed shaving track. While meeting the safety requirements, the material thickness at the mesh top corresponding to the mixed shaving track can be made thinner, improving the shaving cleanliness of the mixed shaving track. Moreover, the combination of the inlet hair pore and the semi-open inlet hair slot can prevent the skin contact surface on the mixed shaving track from being divided into independent surfaces, improving the skin feel.

[0019] 2. The semi-open inlet hair slot and the inlet hair pore of the utility model are integrally formed with the cutter net body by powder metallurgy. The structure is simple, the production process of the semi-open inlet hair slot and the inlet hair pore is simplified, which is beneficial to reducing the distances between the semi-open inlet hair slot and the inlet hair pore, between the semi-open inlet hair slots, and between the inlet hair pores, improving the hair inlet efficiency.

[0020] 3. The upper ports of the inlet hair pore and the semi-open inlet hair slot of the utility model are provided with rounded corners, having a good skin feel and a high hair inlet efficiency; the inlet hair pore and the semi-open inlet hair slot are provided with sharp blades, with sharp cutting.

[0021] 4. In the present utility model, on the same mixing shaving track, a plurality of the outer hair inlet grooves are arranged in a circumferential direction on the outer side of the mixing shaving track, and a plurality of hair inlet pores are arranged in a circumferential direction inside the outer hair inlet grooves. This is conducive to making the material thickness of the corresponding mesh top inside the mixing shaving track thinner than that outside. During the shaving process, as the razor moves, the outer hair inlet grooves facilitate the entry of medium-length hairs on the outside of the mixing shaving track for cutting. The unshaven short whiskers after cutting can quickly enter the adjacent hair inlet pores during the movement of the razor for further shaving.

[0022] 5. In the present utility model, a plurality of hair inlet pores arranged in a circumferential direction are spaced between the outer hair inlet grooves and the inner hair inlet grooves. Then, the outer hair inlet grooves are located on the outer side of the mixing shaving track, the inner hair inlet grooves are located on the inner side of the mixing shaving track, and hair inlet pores are provided in the middle of the mixing shaving track. This is conducive to making the material thickness of the corresponding mesh top of the mixing shaving track thinner in the middle and gradually thicker at both sides, thereby facilitating increasing the widths of the outer hair inlet grooves and the inner hair inlet grooves to improve the hair inlet efficiency. The unshaven short whiskers after cutting by the outer hair inlet grooves or the inner hair inlet grooves can quickly enter the adjacent hair inlet pores during the movement of the razor for further shaving.

Description of the Drawings

[0023] The following further details the specific embodiments of the present utility model with reference to the drawings, where:

[0024] Figure 1 is a schematic structural view of an embodiment of a powder metallurgy cutter net with slot-hole combination of the present utility model;

[0025] Figure 2 is a schematic structural view of another embodiment of a powder metallurgy cutter net with slot-hole combination of the present utility model;

[0026] Figure 3 is a schematic structural view of a third embodiment of a powder metallurgy cutter net with slot-hole combination of the present utility model;

[0027] Figure 4 is Figure 3 a partial enlarged view of II in

[0028] Figure 5 is a cross-sectional schematic view of a hair inlet pore or a semi-open hair inlet groove.

Specific Embodiments

[0029] The following further describes the present utility model with reference to the drawings:

[0030] As Figures 1 to 5A powder metallurgy cutter net with slot holes combination is shown, including a cutter net body 1. On the net top 20 of the cutter net body 1, there is a hybrid shaving track 60. On the hybrid shaving track 60, a plurality of semi-open hair inlet slots penetrating the net top 20 up and down are arranged in the circumferential direction. In the same arc segment corresponding to the plurality of semi-open hair inlet slots on the hybrid shaving track 60, there are a plurality of hair inlet holes 4a2 penetrating the net top 20 up and down. The periphery of the hair inlet holes 4a2 is closed. One end of the semi-open hair inlet slot has a lateral opening 4c and the other end is a closed end, and its closed end terminates at the middle of the hybrid shaving track 60. Preferably, the closed end of the semi-open hair inlet slot terminates at the width of 1 / 4 to 1 / 2 of the hybrid shaving track 60. Therefore, the semi-open hair inlet slot has a closed end and is relatively short, which has better safety. And the semi-open hair inlet slot having a lateral opening 4c is conducive to the entry of medium-length hair for cutting. The hair inlet holes 4a2 and the semi-open hair inlet slots are mixedly arranged in the same arc segment on the hybrid shaving track 60. While meeting the safety requirements, the material thickness of the net top corresponding to the hybrid shaving track 60 can be made thinner, improving the shaving cleanliness of the hybrid shaving track 60. Moreover, the combination of the hair inlet holes 4a2 and the semi-open hair inlet slots can prevent the skin contact surface on the hybrid shaving track 60 from being divided into independent surfaces, improving the skin feeling.

[0031] As Figure 3 shown in the embodiment, on the same hybrid shaving track 60, the semi-open hair inlet slot is an outer hair inlet slot 4a1 with a lateral opening 4c at the outer end. A plurality of the outer hair inlet slots 4a1 are arranged in the circumferential direction on the outer side of the hybrid shaving track 60. A plurality of the hair inlet holes 4a2 are arranged in the circumferential direction inside the outer hair inlet slots 4a1, which is conducive to making the material thickness of the net top corresponding to the inner side of the hybrid shaving track 60 thinner than that of its outer side. During the shaving process, as the razor moves, the outer hair inlet slots 4a1 are conducive to the entry of medium-length hair on the outer side of the hybrid shaving track 60 for cutting. The unshaven short whiskers after cutting can quickly enter the adjacent hair inlet holes 4a2 to be further shaved during the movement of the razor. Preferably, the hair inlet holes 4a2 are irregular polygon holes, which is convenient for the razor to move from different directions and for hairs with different growth directions to enter the hair inlet holes 4a2 for cutting.

[0032] As Figure 1 and Figure 2In the illustrated embodiment, on the same hybrid shaving track 60, the semi-inward hair inlet grooves include an outer hair inlet groove 4a1 with a lateral opening 4c at the outer end and an inner hair inlet groove 4a3 with a lateral opening 4c at the inner end. A plurality of the outer hair inlet grooves 4a1 are arranged circumferentially on the outer side of the hybrid shaving track 60, and a plurality of the inner hair inlet grooves 4a3 are arranged circumferentially on the inner side of the hybrid shaving track 60. The outer hair inlet groove 4a1 facilitates the entry of medium-length hairs on the outer side of the hybrid shaving track 60 into the cutting area, and the inner hair inlet groove 4a3 facilitates the entry of medium-length hairs on the inner side of the hybrid shaving track 60 into the cutting area.

[0033] Preferably, as Figure 1 shown in the embodiment, a plurality of circumferentially arranged hair inlet holes 4a2 are spaced between the outer hair inlet groove 4a1 and the inner hair inlet groove 4a3 on the hybrid shaving track 60. Then, the outer hair inlet groove 4a1 is located on the outer side of the hybrid shaving track 60, the inner hair inlet groove 4a3 is located on the inner side of the hybrid shaving track 60, and the hair inlet holes 4a2 are provided in the middle of the hybrid shaving track 60. This structure facilitates making the material thickness of the corresponding mesh top of the hybrid shaving track 60 thinner in the middle and gradually thicker on both sides, thereby facilitating making the widths of the outer hair inlet groove 4a1 and the inner hair inlet groove 4a3 larger to improve the hair inlet efficiency. Moreover, the short whiskers that are not completely shaved after cutting by the outer hair inlet groove 4a1 or the inner hair inlet groove 4a3 can quickly enter the adjacent hair inlet holes 4a2 during the movement of the razor for further shaving. Further, a hair inlet hole 4a2 is provided between two adjacent outer hair inlet grooves 4a1 on the hybrid shaving track 60.

[0034] Or as Figure 2 shown in the embodiment, hair inlet holes 4a2 are provided between two adjacent outer hair inlet grooves 4a1 and / or between two adjacent inner hair inlet grooves 4a3 on the hybrid shaving track 60.

[0035] Preferably, a shaving track 6 is further provided on the mesh top 20 of the cutter net body 1. The shaving track 6 is located on the outer side, the hybrid shaving track 60 is located on the inner side, and a separation groove 14 with a downward concave shape is provided between the hybrid shaving track 60 and the shaving track 6 to separate the two. The outer hair inlet groove 4a1 on the hybrid shaving track 60 is connected to the separation groove 14 through the lateral opening 4c. The separation groove facilitates the bouncing up of the pressed hairs and better entry into the outer hair inlet groove 4a1 through the lateral opening 4c.

[0036] Preferably, the shaving track 6 is provided with a hair inlet groove 4 having a lateral opening at the outer end and / or the inner end. The hair inlet groove makes the shaving efficiency of the shaving track 6 high. After shaving by the outer shaving track 6, the remaining hair is further shaved and the missed hair is shaved off by the inner hybrid shaving track 60.

[0037] The middle parts of the hair inlet grooves 4 on the shaving track 6 are bent in the same direction, which can better prevent the skin from being squeezed in and cut.

[0038] Preferably, the semi-inward hair inlet grooves and the hair inlet holes 4a2 and the cutter net body 1 are integrally formed by powder metallurgy, with a simple structure, which simplifies the production process of the semi-inward hair inlet grooves and the hair inlet holes 4a2, facilitates reducing the distances between the semi-inward hair inlet grooves and the hair inlet holes 4a2, between the semi-inward hair inlet grooves and between the hair inlet holes 4a2 and improves the hair inlet efficiency.

[0039] Preferably, as Figure 4 and Figure 5 shown, the upper ports of the hair inlet holes 4a2 and the semi-inward hair inlet grooves are provided with chamfered corners R, which improves the skin feel and the hair inlet efficiency; the hair inlet holes 4a2 and the semi-inward hair inlet grooves are provided with sharp cutting edges 4b to improve the sharpness of cutting.

[0040] For the powder metallurgy integral forming process, it includes the following steps:

[0041] A. Inject the raw material with stainless steel powder through an injection molding machine to obtain a cutter net blank. The cutter net blank includes the cutter net body 1. The cutter net body 1 has an inner cavity with an opening facing downwards. A plurality of downwardly concave semi-inward hair inlet grooves and hair inlet holes are integrally formed on the net top 20 of the cutter net body 1. The semi-inward hair inlet grooves and the hair inlet holes have groove walls that are inclined upwards and outwards. A chamfered corner R is formed between the groove walls and the top surface of the net top of the cutter net body 1;

[0042] B. Place the cutter net blank into a degreasing furnace for degreasing;

[0043] C. Place the degreased cutter net blank into a sintering furnace for sintering;

[0044] D. Perform heat treatment hardening on the sintered cutter net blank. Preferably, the heat treatment hardening makes the hardness of the cutter net blank reach above 40HRC;

[0045] E. Cut off part of the material from the bottom of the net top of the cutter net body 1 to make the material at the net top corresponding to the mixed shaving track 60 thinner, and make the semi-inward hair inlet grooves and the hair inlet holes penetrate the net top from top to bottom.

[0046] When the shaving track 6 is further provided on the net top 20, the cutter net blank includes the shaving track and the corresponding hair inlet groove.

[0047] In an embodiment, the raw material with stainless steel powder is made into granular raw material by mixing stainless steel powder and POM powder evenly through a granulator, wherein the mass ratio of POM powder is 5% - 15%; the stainless steel powder can be selected from 440C stainless steel powder or 316 stainless steel powder or 420 stainless steel powder.

[0048] In step B, the degreasing temperature is 100°C to 150°C. Oxalic acid is introduced into the degreasing furnace to vaporize and remove the POM material in the knife net blank at high temperature. The degreasing time is 6h to 10h.

Claims

1. A powder metallurgy knife mesh with slots and holes, characterized in that: The invention comprises a blade net body (1), wherein a mixed shaving track (60) is arranged on a net top (20) of the blade net body (1), wherein a plurality of half-open hair inlet grooves are arranged on the mixed shaving track (60) in a circumferential direction and penetrate the net top (20) vertically, and a plurality of hair inlet holes (4a2) are arranged in the same arc section corresponding to the plurality of half-open hair inlet grooves on the mixed shaving track (60) and penetrate the net top (20) vertically, wherein the hair inlet holes (4a2) are closed on all sides, and the half-open hair inlet groove has a lateral opening (4c) at one end and a closed end at the other end, and the closed end terminates at the middle of the mixed shaving track (60).

2. The slot-hole combined powder metallurgy knife mesh according to claim 1, characterized in that: On the same hybrid shaving track (60), the semi-open hair inlet groove is an outer hair inlet groove (4a1) having a lateral opening (4c) at the outer end, a plurality of the outer hair inlet grooves (4a1) are arranged on the outer side of the hybrid shaving track (60) in a circumferential direction, and a plurality of the hair inlet holes (4a2) are arranged on the inner side of the outer hair inlet groove (4a1) in a circumferential direction.

3. The slot-hole combined powder metallurgy knife mesh according to claim 1, characterized in that: On the same hybrid shaving track (60), the semi-open hair inlet grooves include an outer hair inlet groove (4a1) having a lateral opening (4c) at the outer end and an inner hair inlet groove (4a3) having a lateral opening (4c) at the inner end; a plurality of the outer hair inlet grooves (4a1) are arranged on the outer side of the hybrid shaving track (60) in a circumferential direction, and a plurality of the inner hair inlet grooves (4a3) are arranged on the inner side of the hybrid shaving track (60) in a circumferential direction.

4. The slot-hole combined powder metallurgy knife mesh according to claim 3, characterized in that: A plurality of hair inlet holes (4a2) arranged in a circumferential direction are arranged between the outer hair inlet groove (4a1) and the inner hair inlet groove (4a3) on the hybrid shaving track (60), and / or hair inlet holes (4a2) are arranged between two adjacent outer hair inlet grooves (4a1) and / or between two adjacent inner hair inlet grooves (4a3) on the hybrid shaving track (60).

5. The slot-hole combined powder metallurgy knife mesh according to claim 1, characterized in that: The upper ends of the hair inlet holes (4a2) and the half-open hair inlet grooves are provided with rounded corners R, and the hair inlet holes (4a2) and the half-open hair inlet grooves are provided with sharp-angled blades (4b).

6. The slot-hole combined powder metallurgy knife mesh according to claim 1, characterized in that: The closed end of the semi-open hair inlet channel ends at 1 / 4 to 1 / 2 of the width of the hybrid shaving track (60).

7. A powder metallurgy knife mesh with slots and holes according to any one of claims 2 to 6, characterized in that: A shaving track (6) is provided on the mesh top (20) of the knife mesh body (1), the shaving track (6) is located on the outside, the mixed shaving track (60) is located on the inside, a recessed spacing groove (14) is provided between the mixed shaving track (60) and the shaving track (6) to separate the two, and an outer hair inlet groove (4a1) on the mixed shaving track (60) is connected to the spacing groove (14) via a lateral opening (4c).

8. The slot-hole combined powder metallurgy knife mesh according to claim 7, characterized in that: The shaving track (6) is provided with a hair feeding groove (4) having a lateral opening at the outer end and / or the inner end.

9. The slot-hole combined powder metallurgy knife mesh according to claim 8, characterized in that: The middle parts of the hair feeding grooves (4) on the shaving track (6) are all bent in the same direction.

10. A powder metallurgy knife mesh with slots and holes according to any one of claims 1 to 6 and 8 to 9, characterized in that: The half-open hair feeding groove and the hair feeding hole (4a2) are integrally formed with the knife net body (1) by powder metallurgy.

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