A method for processing a spinneret

Abstract

The invention discloses a method for processing a spinneret. The method for processing a spinneret includes a processing method for forming a unit hole at the bottom of a spinneret blank, and the processing steps of the unit hole include: step S1: fixing the spinneret blank on a machine tool; step S2: punching out a plurality of first-stage holes at the bottom of the spinneret blank using a machine tool equipped with a first punch; step S3: punching out a second-stage hole in the first-stage hole using a machine tool equipped with a second punch; step S4: punching out a third-stage hole in the second-stage hole using a machine tool equipped with a third punch and forming a spinneret, wherein the third-stage hole is a through hole parallel to the thickness direction of the spinneret blank and has a cross-sectional shape of an equilateral triangle; after the first-stage hole, the second-stage hole and the third-stage hole are connected, a unit hole penetrating the spinneret blank is formed, and the material of the first punch, the second punch and the third punch is 3Cr2W8V. The spinneret method avoids the situation that the cutter often breaks when using a milling cutter for processing in the traditional technology.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco parts processing, in particular to a processing method of a spinneret. Background Art

[0002] The spinneret is mainly used in equipment for producing cigarettes. There are 110 special small triangles at the bottom of the spinneret to form a unit hole. Since there is a small triangle hole with a side length of only 0.04mm in the unit hole, the diameter of the milling cutter must be less than 0.02mm during processing. Such a small milling cutter will break at the touch during processing, which makes it very difficult to process this product and consumes a lot of cost. At the same time, the country is currently unable to master the technology of how to process the unit holes on the spinneret, so it is impossible to mass-produce the spinneret, and the equipment for producing the spinneret has been introduced from abroad.

[0003] Therefore, there is an urgent need for a method for processing a spinneret cap to avoid the problem of cutter breakage that often occurs when using a milling cutter in traditional technology. Summary of the invention

[0004] The object of the present invention is to provide a method for processing a spinneret, which is used to avoid the situation that the milling cutter often breaks when processing with the milling cutter in the traditional technology.

[0005] The purpose of the present invention is achieved by the following technical solutions:

[0006] A method for processing a spinneret, the method is used to form a plurality of unit holes at the bottom of a spinneret blank, wherein an inner wall surface on one side of the unit hole comprises a first slope surface, a second slope surface, a third slope surface and a fourth slope surface sequentially connected from top to bottom, the slope of the first slope surface is smaller than the slope of the second slope surface, and the edge of the first slope surface away from the connection between the first slope surface and the second slope surface is smoothly transitioned, and the other inner wall surfaces in the unit hole comprise three sections of slope surfaces sequentially connected from top to bottom, and the slopes of the three sections of slope surfaces gradually decrease from top to bottom, and the processing steps of the unit hole include:

[0007] Step S1: fixing the spinneret cap blank on the machine tool;

[0008] Step S2: punching a plurality of first-stage holes at the bottom of the spinneret blank using a machine tool equipped with a first punch;

[0009] Step S3: punching a second hole in the first hole using a machine tool equipped with a second punch;

[0010] Step S4: using a machine tool equipped with a third punch to punch out a third section of holes in the second section of holes and form a spinneret, wherein the third section of holes is a through hole parallel to the thickness direction of the spinneret blank and has a cross-sectional shape of an equilateral triangle;

[0011] The first section of holes, the second section of holes and the third section of holes are connected to form a unit hole that penetrates the spinneret blank. The first punch, the second punch and the third punch are made of 3Cr2W8V.

[0012] Preferably, the diameter of the edge on the first slope surface away from the connection between the first slope surface and the second slope surface is 1.44 mm.

[0013] Preferably, a plurality of the unit holes are evenly distributed at the bottom of the spinneret blank.

[0014] Preferably, the first punch, the second punch and the third punch all include a body in a triangular pyramid-like structure, the top of the body is provided with a horizontal plane perpendicular to the height direction of the body, two of the side edges of the body and the midline of the body are at an angle of 25-35 degrees, and the other side edge of the body is provided with a side plane at the end away from the top of the body, and the angle between the side plane of the body and the midline of the body is 15-25 degrees.

[0015] Preferably, the height of the body is 0.8 mm, the angle between two side edges of the body and the perpendicular midline of the body is 30 degrees, and the angle between the side plane of the body and the perpendicular midline of the body is 20 degrees.

[0016] Preferably, the diameter of the edge of the side plane of the body at the bottom end of the body is 1.44 mm.

[0017] Preferably, the second punch in step S2 also includes a first extension portion, which is a triangular prism-like structure with a small top and a large bottom, and is connected to the top of the main body. A horizontal plane is provided at the end of the first extension portion away from the main body, and the angle between the side edge of the first extension portion and the mid-perpendicular line of the main body is 10 degrees.

[0018] Preferably, the side length of the bottom end of the first extension portion is 0.17 mm, the side length of the top end is 0.04 mm, and the height of the first extension portion is 0.15 mm.

[0019] Preferably, the third punch in step S3 also includes a first extension portion and a second extension portion, the structure and position of the first extension portion of the third punch are the same as the structure and position of the first extension portion on the second punch, the second extension portion is a regular triangular prism structure, the second extension portion is connected to the top end of the first extension portion of the third punch, a horizontal plane is provided at the end of the second extension portion away from the main body, and the side edges of the second extension portion are parallel to the central axis of the main body.

[0020] Preferably, the height of the second extension portion is 0.05 mm, and the side length of the end portion of the second extension portion is 0.04 mm.

[0021] Compared with the prior art, the beneficial effects of the present invention include at least:

[0022] The first punch, the second punch and the third punch made of 3Cr2W8V are used to sequentially process the first hole, the second hole and the third hole at the bottom of the spinneret blank. The first hole, the second hole and the third hole are connected to form a unit hole that penetrates the spinneret blank. The first punch, the second punch and the third punch can meet the requirement that the punch for punching the spinneret blank cannot be broken when the diameter is small (the minimum radial dimension is less than 0.04mm), and a unit hole with a specific structure can be punched. By using the above method, the problem of tool breakage that often occurs when a milling cutter is used for processing in the traditional technology is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a spinneret in an embodiment of the present invention;

[0024] Figure 2 is a schematic cross-sectional view of a unit hole in an embodiment of the present invention;

[0025] Figure 3 is a front view of a first punch in an embodiment of the present invention;

[0026] Figure 4 is a top view of a first punch in an embodiment of the present invention;

[0027] Figure 5 is a front view of a second punch in an embodiment of the present invention;

[0028] Figure 6 is a top view of the second punch in an embodiment of the present invention;

[0029] Figure 7 is a front view of a third punch in an embodiment of the present invention;

[0030] Figure 8 4 is a top view of the third punch in the embodiment of the present invention.

[0031] In the figure: 1, first section hole; 2, second section hole; 3, third section hole; 5, first slope surface; 6, second slope surface; 7, third slope surface; 8, fourth slope surface; 9, first punch; 10, second punch; 11, third punch; 12, first extension part; 13, second extension part; 14, main body. DETAILED DESCRIPTION

[0032] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0033] The words expressing position and direction described in the present invention are all explained by taking the accompanying drawings as examples, but they can be changed as needed, and all changes are included in the protection scope of the present invention.

[0034] The present invention provides a method for processing a spinneret, such as Figures 1 to 8 As shown, the processing method is used to form a plurality of unit holes at the bottom of the spinneret blank, and the unit holes have a specific structure. Specifically, the depth h4 of the unit hole is 1 mm, and the inner wall surface on one side of the unit hole includes a first slope 5, a second slope 6, a third slope 7 and a fourth slope 8 connected in sequence from top to bottom. The slope of the first slope 5 is smaller than the slope of the second slope 6. The depth h1 of the fourth slope 8 is 0.05 mm, the depth h2 of the third slope 7 is 0.15 mm, the depth h3 of the second slope 6 is 0.4 mm, and the depth h6 of the first slope 5 is 0.4 mm. The edge of the first slope 5 away from the connection between the first slope 5 and the second slope 6 is smoothly transitioned, and the other inner wall surfaces in the unit hole include three sections of slopes connected in sequence from top to bottom, and the slopes of the three sections of slopes gradually decrease from top to bottom. The processing steps of the unit hole include: step S1-step S4.

[0035] Step S1: Fix the spinneret blank on a machine tool, which may be a punching machine.

[0036] Step S2: using a machine tool equipped with a first punch 9 to punch out a plurality of first-stage holes 1 at the bottom of the spinneret blank.

[0037] Step S3: punching out a second section hole 2 in the first section hole 1 using a machine tool equipped with a second punch 10 .

[0038] Step S4: using a machine tool equipped with a third punch 11 to punch out a third section hole 3 in the second section hole 2 and form a spinneret. The third section hole 3 is a through hole parallel to the thickness direction of the spinneret blank and has a cross-sectional shape of an equilateral triangle.

[0039] The first section hole 1, the second section hole 2 and the third section hole 3 are connected to form a unit hole that penetrates the spinneret blank. The material of the first punch 9, the second punch 10 and the third punch 11 is 3Cr2W8V. It should be noted that the same machine tool or three machine tools can be used in step S2, step S3 and step S4. In this embodiment, the same machine tool is used to save processing costs. After completing step S2, the first punch 9 is replaced, replaced with the second punch 10 and step S3 is completed. Then the second punch 10 is replaced, replaced with the third punch 11 and step S4 is completed. Compared with the prior art, even if the 0.2 mm milling cutter can be processed, the 0.02 mm milling cutter is very likely to break during the processing. By using the first punch 9, the second punch 10 and the third punch 11 made of 3Cr2W8V material, the processing cost is saved. A first section hole 1, a second section hole 2 and a third section hole 3 are punched out in sequence at the bottom of the spinneret blank, and after the first section hole 1, the second section hole 2 and the third section hole 3 are connected, a unit hole with a depth h4 of 1 mm penetrating the spinneret blank is formed, thereby forming a spinneret. In the present invention, the first punch 9, the second punch 10 and the third punch 11 are made of a specific high-temperature resistant alloy material of 3Cr2W8V material, and the hardness reaches HRC42-46. At the same time, the first punch 9, the second punch 10 and the third punch 11 are made with sufficient flexibility to meet the requirement that the punch for punching the spinneret blank cannot be broken when the diameter is small (the minimum radial size can be less than or equal to 0.04mm), and a unit hole of a specific structure is punched. By using the above method, the situation of tool breakage that often occurs when a milling cutter is used in traditional technology is avoided, and a technological breakthrough is achieved.

[0040] As a further implementation of this embodiment, Figure 2 As shown, the diameter γ of the edge on the first slope surface 5 away from the connection between the first slope surface 5 and the second slope surface 6 is 1.44 mm.

[0041] As a further implementation of this embodiment, Figure 1 As shown, a plurality of unit holes are evenly distributed at the bottom of the spinneret blank.

[0042] As a further implementation of this embodiment, Figures 2 to 8As shown, the first punch 9, the second punch 10 and the third punch 11 all include a body 14 in a triangular pyramid-like structure, the height h5 of the body 14 is 0.8 mm, the top of the body 14 is provided with a horizontal plane perpendicular to the height direction of the body 14, two of the side edges of the body 14 and the midline of the body 14 The angle b is 25-35 degrees, and the angle b is 30 degrees in this embodiment. The other side edge of the body 14 is provided with a side plane at the end away from the top of the body 14, and the angle a between the side plane of the body 14 and the midline of the body 14 is 15-25 degrees. The angle a is 20 degrees in this embodiment. The first punch 9 only includes the body 14. By using a machine tool equipped with the first punch 9, a first section hole 1 with a depth h5 of 0.8 mm corresponding to the first punch 9 is punched out on the product.

[0043] As a further implementation of this embodiment, Figure 3 , 5 As shown in FIG. 7 , the diameter γ of the edge of the side plane of the main body 14 located at the bottom end of the main body 14 is 1.44 mm. By providing the punch with the above structure, the diameter γ of the edge on the first slope 5 in the unit hole away from the connection between the first slope 5 and the second slope 6 can be 1.44 mm, so that there is no need to use a milling cutter during the processing, and the processing of the unit hole can be completed using a punch, saving processing costs.

[0044] As a further implementation of this embodiment, Figures 3 to 8 As shown, the second punch 10 in step S2 also includes a first extension portion 12, the first extension portion 12 is a triangular prism structure with a small top and a large bottom, the first extension portion 12 is connected to the top of the body 14, and the end of the first extension portion 12 away from the body 14 is provided with a horizontal plane perpendicular to the height direction of the body 14, the angle c between the side edge of the first extension portion 12 and the mid-perpendicular line of the body 14 is 10 degrees, the side length m of the bottom end of the first extension portion 12 is 0.17 mm, the side length j of the top end is 0.04 mm, and the height of the first extension portion 12 is 0.17 mm. The depth h2 is 0.15mm. By using a machine tool equipped with a second punch 10, a second hole 2 with a depth h2 of 0.15mm corresponding to the second punch 10 is punched out on the product on the basis of the first hole 1. It should be noted that when the second punch 10 punches downward, the body 14 of the second punch 10 is located in the first hole 1 punched out by the first punch 9, and the body 14 of the second punch 10 does not squeeze the product, and the first extension portion 12 of the second punch 10 punches out the second hole 2 downward on the basis of the first hole 1.

[0045] As a further implementation of this embodiment, Figures 3 to 8As shown, the third punch 11 in step S3 also includes a first extension portion 12 and a second extension portion 13. The structure and position of the first extension portion 12 of the third punch 11 are the same as those of the first extension portion 12 on the second punch 10. The second extension portion 13 is a regular triangular prism structure. The second extension portion 13 is connected to the top of the first extension portion 12 of the third punch 11. The end of the second extension portion 13 away from the body 14 is provided with a horizontal plane perpendicular to the height direction of the body 14. The side edge of the second extension portion 13 is parallel to the central axis of the body 14. The height h1 of the second extension portion 13 is 0.05 mm. The side edge of the end of the second extension portion 13 is 0.05 mm. The length j is 0.04mm. By using a machine tool equipped with a third punch 11, a third hole 3 with a depth h1 of 0.05mm corresponding to the third punch 11 is punched out on the product on the basis of the second hole 2. It should be noted that when the third punch 11 punches downward, the body 14 of the third punch 11 is located in the first hole 1 punched out by the first punch 9, and the first extension 12 of the third punch 11 is located in the second hole 2, and the body 14 of the third punch 11 does not squeeze the product, and the first extension 12 of the third punch 11 does not squeeze the product, and the second extension 13 punches out the third hole 3 downward on the basis of the second hole 2.

[0046] By adopting the first punch 9, the second punch 10 and the third punch 11 of the above-mentioned specific structure, and cooperating with the use of the specific high-temperature resistant alloy material of 3Cr2W8V, the first punch 9, the second punch 10 and the third punch 11 will not break after completing multiple punchings, thereby extending the service life of the first punch 9, the second punch 10 and the third punch 11, so that the first punch 9, the second punch 10 and the third punch 11 can be suitable for the mass production of spinneret caps.

[0047] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, substitute and modify the above embodiments within the scope of the invention without departing from the principles and purpose of the present invention. All such changes should fall within the scope of protection of the claims of the present invention.

Claims

1. A method for processing a spinneret, characterized in that: The processing method is used to form a plurality of unit holes at the bottom of a spinneret blank, wherein an inner wall surface on one side of the unit hole comprises a first slope surface, a second slope surface, a third slope surface and a fourth slope surface connected in sequence from top to bottom, wherein the slope of the first slope surface is smaller than the slope of the second slope surface, and an edge on the first slope surface away from the connection between the first slope surface and the second slope surface presents a smooth transition, and the other inner wall surfaces in the unit hole comprise three sections of slope surfaces connected in sequence from top to bottom, and the slopes of the three sections of slope surfaces gradually decrease from top to bottom, and the processing steps of the unit hole comprise: Step S1: fixing the spinneret cap blank on the machine tool; Step S2: punching a plurality of first-stage holes at the bottom of the spinneret blank using a machine tool equipped with a first punch; Step S3: punching a second hole in the first hole using a machine tool equipped with a second punch; Step S4: using a machine tool equipped with a third punch to punch out a third section of holes in the second section of holes and form a spinneret, wherein the third section of holes is a through hole parallel to the thickness direction of the spinneret blank and has a cross-sectional shape of an equilateral triangle; The first section of holes, the second section of holes and the third section of holes are connected to form a unit hole that penetrates the spinneret blank, and the material of the first punch, the second punch and the third punch is 3Cr2W8V; The first punch, the second punch and the third punch all include a body in a triangular pyramid-like structure, the top of the body is provided with a horizontal plane perpendicular to the height direction of the body, two of the side edges of the body and the midline of the body are at an angle of 25-35 degrees, the other side edge of the body is provided with a side plane at the end away from the top of the body, and the side plane of the body and the midline of the body are at an angle of 15-25 degrees; The second punch in step S2 further includes a first extension portion, the first extension portion is a triangular prism-like structure with a small top and a large bottom, the first extension portion is connected to the top of the main body, the end of the first extension portion away from the main body is provided with a horizontal plane perpendicular to the height direction of the main body, and the angle between the side edge of the first extension portion and the perpendicular midline of the main body is 10 degrees; The third punch in step S3 also includes a first extension portion and a second extension portion. The structure and position of the first extension portion of the third punch are the same as those of the first extension portion on the second punch. The second extension portion is a regular triangular prism structure. The second extension portion is connected to the top of the first extension portion of the third punch. A horizontal plane perpendicular to the height direction of the body is provided at one end of the second extension portion away from the body, and the side edges of the second extension portion are parallel to the central axis of the body.

2. The method for processing a spinneret according to claim 1, characterized in that: The diameter of the edge on the first slope surface away from the connection between the first slope surface and the second slope surface is 1.44 mm.

3. The method for processing a spinneret according to claim 1, characterized in that: A plurality of unit holes are evenly distributed on the bottom of the spinneret blank.

4. The method for processing a spinneret according to claim 1, characterized in that: The height of the body is 0.8 mm, the angles between two side edges of the body and the perpendicular midline of the body are 30 degrees, and the angle between the side plane of the body and the perpendicular midline of the body is 20 degrees.

5. The method for processing a spinneret according to claim 4, characterized in that: The diameter of the edge of the side plane of the body located at the bottom end of the body is 1.44 mm.

6. The method for processing a spinneret according to claim 1, characterized in that: The side length of the bottom end of the first extension portion is 0.17 mm, the side length of the top end is 0.04 mm, and the height of the first extension portion is 0.15 mm.

7. The method for processing a spinneret according to claim 1, characterized in that: The height of the second extension portion is 0.05 mm, and the side length of the end portion of the second extension portion is 0.04 mm.

Images