Mouth mold and production equipment and method for columnar strip with spiral strip ribs on surface

Abstract

The invention discloses a die and production equipment and method for a columnar strip with spiral strip ribs on the surface, and relates to industrial production equipment.The die is densely provided with a plurality of spiral discharging holes in a penetrating mode, and the center lines of the spiral discharging holes are parallel to one another; wherein a plurality of rib grooves are formed in the hole wall of the spiral discharging hole, each rib groove is distributed in a spiral shape, and the rib grooves are bent and wound on the hole wall of the spiral discharging hole in parallel; the spiral discharging holes are used for extruding columnar strips with spiral strip ribs on the surfaces. The production equipment comprises the tubular screw conveyor, and when the tubular screw conveyor conveys powder raw materials to a finished product outlet of the tubular screw conveyor, the spiral discharging hole in the mouth mold can extrude columnar strips with spiral strip ribs on the surfaces.

Description

Technical Field

[0001] The invention relates to industrial production equipment, in particular to a production equipment and method for a die and a columnar strip with spiral ribs on the surface. Background Art

[0002] Fixed bed is a widely used multiphase reactor, in which particles are usually randomly packed.

[0003] However, particles currently used as fillers are typically smooth, cylindrical in shape, with a three-leaf, four-leaf, or round cross-section. These smooth, columnar particles accumulate within a fixed bed to form a dense layer. However, such a dense layer has an undesirable pore structure due to a small number of interparticle pores, small pores, lack of connectivity between particles, and the presence of tortuous or even closed pores. When fluid passes through such a dense bed, it results in a high pressure drop, uneven fluid distribution, and low particle utilization.

[0004] Unlike columnar particles with smooth surfaces, columnar particles with spiral surfaces can improve the pore distribution of the bed and increase the porosity of the bed. The fluid can pass through more evenly distributed pores, resulting in better fluid distribution uniformity and greatly reducing the bed pressure drop of the packed bed.

[0005] In order to generate columnar particles with a spiral surface, columnar strips with a spiral surface must be produced first, and then the columnar strips with a spiral surface are crushed to obtain columnar particles with a spiral surface.

[0006] However, there is currently a lack of equipment that can produce columnar strips with a spiral surface. Summary of the Invention

[0007] In view of the above problems, the purpose of the present invention is to provide a die, a production device and a method for columnar strips with spiral ribs on the surface, so as to solve the problem that there is currently a lack of equipment that can produce columnar strips with spiral ribs on the surface.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] In the first aspect, the present invention discloses a die, which is densely distributed with a plurality of spiral discharge holes, and the center lines of the plurality of spiral discharge holes are parallel to each other; wherein, the hole wall of the spiral discharge hole is provided with a plurality of rib grooves, each rib groove is distributed in a spiral shape, and the plurality of rib grooves are bent and wound parallel to each other on the hole wall of the spiral discharge hole; the spiral discharge hole is used to extrude columnar strips with spiral ribs on the surface.

[0010] Preferably, the die is in the shape of a cylindrical disk. Specifically, the die has a diameter of 75 mm and a thickness of 10 mm.

[0011] In one preferred embodiment, the cross-sectional profile of the spiral discharge hole is a clover-leaf shape, that is, the spiral discharge hole includes three rib grooves, which are evenly spaced and parallel to each other and bent and wound around the hole wall of the spiral discharge hole.

[0012] When the cross-sectional profile of the spiral discharge hole is a clover-leaf shape, the cross-sectional profile of the spiral discharge hole includes three arc segments, the arc diameters of the three arc segments are equal, and the angle formed by the connection between the centers of any two arc segments and the center of the spiral discharge hole is 120 degrees, and the connected arc ends are connected by arc transitions.

[0013] In another preferred embodiment, the cross-sectional profile of the spiral discharge hole is a four-leaf clover shape, that is, the spiral discharge hole includes four rib grooves, and the four rib grooves are evenly spaced and bent parallel to each other and wrapped around the hole wall of the spiral discharge hole.

[0014] When the cross-sectional profile of the spiral discharge hole is a four-leaf clover shape, the cross-sectional profile of the spiral discharge hole includes four arc segments, the arc diameters of the four arc segments are equal, and the angle formed by the connection between the centers of any two adjacent arc segments and the center of the spiral discharge hole is 90 degrees.

[0015] In the second aspect, the present invention also discloses a production equipment for columnar strips with spiral ribs on the surface, comprising a tubular screw conveyor and at least one of the above-mentioned dies, wherein the tubular screw conveyor comprises a sleeve, the discharge end of the sleeve is provided with a finished material outlet, the die is arranged at the finished material outlet of the tubular screw conveyor, and each spiral discharge hole of the die is connected to the finished material outlet; the port of the finished material outlet of the sleeve is fixed with a fixed flange, the fixed flange is provided with a movable flange, the movable flange is connected to the fixed flange by bolts, and the die is clamped between the movable flange and the fixed flange.

[0016] Preferably, the tubular screw conveyor further comprises a motor, a screw push rod and a hopper.

[0017] The screw push rod is fixedly connected to the output shaft of the motor;

[0018] The sleeve is sleeved on the outside of the screw push rod;

[0019] A feed port is provided on the tube wall of the discharge end of the sleeve, the hopper is provided at the feed port of the sleeve, and the discharge port of the hopper is communicated with the feed port of the sleeve.

[0020] Furthermore, the hopper is detachably arranged at the feed port of the sleeve through a connecting sleeve, and the connecting sleeve includes an upper semicircular sleeve and a lower semicircular sleeve, and the upper semicircular sleeve and the lower semicircular sleeve are respectively half of the sleeve after being cut along the center line. When the inner walls of the upper semicircular sleeve and the lower semicircular sleeve respectively wrap the sleeve, the upper semicircular sleeve and the lower semicircular sleeve just form a complete sleeve that can wrap the sleeve; the edges of both sides of the upper semicircular sleeve and the lower semicircular sleeve protrude outward to form flanges, and each flange is respectively provided with a bolt hole, and the flanges on both sides of the upper semicircular sleeve and the flanges on both sides of the lower semicircular sleeve are connected by bolts; a raw material inlet is provided on the upper semicircular sleeve, and the inner walls of the upper semicircular sleeve and the lower semicircular sleeve respectively wrap the feed port of the sleeve, and the raw material inlet of the upper semicircular sleeve is opposite to and connected with the feed port of the sleeve; the discharge port of the hopper is opposite to the raw material inlet of the upper semicircular sleeve and is connected by bolts.

[0021] In a third aspect, the present invention also discloses a method for producing a columnar strip with spiral ribs on the surface, using the above-mentioned production equipment, including:

[0022] Start the motor, and the motor drives the screw push rod to rotate;

[0023] Put the powder raw materials into the hopper, and the powder raw materials enter the feeding port of the casing through the discharge port of the hopper;

[0024] During the rotation of the screw push rod, the powder raw materials entering from the feed port of the sleeve are driven forward until the powder raw materials are transported to the finished material outlet of the sleeve;

[0025] The powdered raw material coming out of the finished material outlet of the sleeve enters into a plurality of spiral discharge holes of the die, and is squeezed into strips in the spiral discharge holes to form columnar strips with spiral ribs on the surface.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) The present invention discloses a die having a plurality of spiral discharge holes densely distributed throughout the die, wherein the center lines of the plurality of spiral discharge holes are parallel to one another; wherein the wall of the spiral discharge holes is provided with a plurality of rib grooves, each of which is distributed in a spiral shape, and the plurality of rib grooves are bent and wound parallel to one another on the wall of the spiral discharge holes. The die disclosed by the present invention has a spiral discharge hole capable of extruding a columnar strip having a spiral rib on its surface, and the cross-sectional profile of the spiral discharge hole is a three-leaf clover shape or a four-leaf clover shape.

[0028] (2) The present invention discloses a production device for columnar strips with spiral ribs on their surfaces, comprising a tubular screw conveyor and at least one die as described above. The tubular screw conveyor includes a sleeve with a finished product outlet at the discharge end of the sleeve. The die is positioned at the finished product outlet of the tubular screw conveyor, and each spiral discharge hole of the die is connected to the finished product outlet. When the tubular screw conveyor conveys powdered raw materials to the finished product outlet of the tubular screw conveyor, the spiral discharge holes in the die can extrude columnar strips with spiral ribs on their surfaces. After drying and crushing, these columnar strips with spiral ribs on their surfaces can produce columnar particles with spiral ribs on their surfaces. Compared to smooth columnar particles without spiral ribs on their surfaces, these columnar particles with spiral ribs on their surfaces help improve the pore structure in the packing bed and significantly reduce the bed pressure drop. The production device for columnar strips with spiral ribs on their surfaces disclosed in the present invention is suitable for rapid, large-scale particle forming and manufacturing. The shape and size of the formed particles can be flexibly adjusted by changing the shape of the die holes. When the powder passes through the die, it can be formed into the required columnar particles with spiral ribs on the outer surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 1 is a front view of a die having a clover-shaped cross-sectional profile provided in Example 1 of the present invention, wherein the cross-sectional profile of the spiral discharge hole thereon is also a clover-shaped profile;

[0030] Figure 2 yes Figure 1 A three-dimensional view of the die after cutting along the diameter;

[0031] Figure 3 yes Figure 1 Schematic diagram of the cross section of the die after cutting along the diameter;

[0032] Figure 4 yes Figure 1 A schematic diagram of the cross-sectional profile of the spiral discharge hole of the die;

[0033] Figure 5 Schematic diagram of a method for drawing the shape of a clover provided in Example 1 of the present invention.

[0034] Figure 6 This is a front view of the die provided in Example 2 of the present invention, whose cross-sectional profile is in the shape of a four-leaf clover, and the cross-sectional profile of the spiral discharge hole thereon is in the shape of a four-leaf clover.

[0035] Figure 7 yes Figure 6 A schematic diagram of the cross-sectional profile of the spiral discharge hole of the die;

[0036] Figure 8This is a schematic diagram of a method for drawing the shape of a four-leaf clover provided in Example 2 of the present invention.

[0037] Figure 9 It is a schematic structural diagram of the production equipment of columnar strips with spiral ribs on the surface provided by Example 3 of the present invention.

[0038] Description of reference numerals: 1-die, 10-spiral discharge hole, 11-rib groove;

[0039] 2- casing, 20- finished product outlet, 21- fixed flange, 22- movable flange;

[0040] 3-motor, 4-screw push rod, 5-hopper;

[0041] 60-flange, 61-upper semicircular sleeve, 62-lower semicircular sleeve, 63-raw material inlet. DETAILED DESCRIPTION

[0042] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0043] In order to solve the problem of the current lack of equipment that can produce columnar strips with spiral ribs on the surface, first of all, it is necessary to develop a new die 1 that can extrude columnar strips with spiral ribs on the surface. Secondly, regarding the shape of the contour of the cross section of the spiral discharge hole 10, a clover shape or a four-leaf clover shape can be considered. Finally, the present invention also provides production equipment and methods for columnar strips with spiral ribs on the surface. The production equipment for columnar strips with spiral ribs on the surface also includes a tubular screw conveyor, which is used to transport powder raw materials to the finished product outlet of the tubular screw conveyor, so that the spiral discharge hole 10 on the die 1 can extrude columnar strips with spiral ribs on the surface.

[0044] Example 1: A die with a clover-shaped cross-section

[0045] Embodiment 1 of the present invention discloses a die having a cross-sectional profile in the shape of a clover leaf, and its structure is described in detail below with reference to the accompanying drawings.

[0046] refer to Figures 1 to 4 The die 1 is in the shape of a cylindrical disk, and is densely distributed with a plurality of spiral discharge holes 10 , and the center lines of the plurality of spiral discharge holes 10 are parallel to each other.

[0047] A plurality of rib grooves 11 are provided on the hole wall of the spiral discharge hole 10 . Each rib groove 11 is distributed in a spiral shape, and the plurality of rib grooves 11 are bent and wound parallel to each other on the inner wall of the spiral discharge hole 10 .

[0048] As an example, the die 1 has a diameter of 75 mm and a thickness of 10 mm.

[0049] As a specific example, the cross-sectional profile of the spiral discharge hole 10 is a clover-shaped shape, that is, the spiral discharge hole 10 includes three rib grooves 11, and the three rib grooves 11 are evenly spaced and bent and wrapped parallel to each other on the hole wall of the spiral discharge hole 10.

[0050] In order to obtain a columnar bar with a clover-shaped cross section and spiral ribs on the surface, the cross-sectional profile of the spiral discharge hole 10 is a clover-shaped shape, such as Figures 1 to 4 shown.

[0051] When the cross-sectional profile of the spiral discharge hole 10 is a clover-leaf shape, the cross-sectional profile of the spiral discharge hole 10 includes three arc segments, the arc diameters of the three arc segments are equal, and the angle formed by the connection between the centers of any two arc segments and the center of the spiral discharge hole 10 is 120 degrees, and the connected arc ends are connected by an arc transition.

[0052] The clover shape is an outer contour composed of an arc segment composed of parts of three circles with equal diameters and an outer contour composed of three arc transition segments formed by chamfering the tip formed by superimposing parts of the three circles with equal diameters when a large circle intersects the three circles with equal diameters.

[0053] In order to overcome the defect of unclear shape of the clover, embodiment 1 of the present invention further provides a method for drawing the shape of the clover, so as to further enable those skilled in the art to understand the shape of the clover.

[0054] Specifically, refer to Figure 5 The diameters of the three circles with equal diameters are 2 mm, the distance between the centers of the three circles with equal diameters and the geometric center of the clover is 1 mm, and the lines connecting the centers of the three circles with equal diameters and the geometric center of the clover are at 120° to each other.

[0055] Since the tip formed by the overlapping of the three circles of equal diameter is easy to wear due to the greater stress area, chamfering is required to eliminate the stress. In order to eliminate the overlapping part of the three circles of the clover, a large circle with a diameter of 2.4mm should be used for chamfering, such as Figure 5 The center of the chamfered large circle is the geometric center of the clover. The arc of the geometric center segment of the four circles away from the clover shape is formed into the clover shape, as shown in FIG. Figure 5 As shown in b.

[0056] A hole is drilled on the die with the above-mentioned clover shape, and the clover shape is twisted axially along the drilling direction of the hole to obtain a spiral discharge hole 10.

[0057] An extrusion molding area is provided on the die 1 , in which 42 spiral discharge holes 10 are evenly distributed. The distance between the centers of adjacent spiral discharge holes 10 is 7 mm.

[0058] Example 2: A die with a four-leaf clover cross-section

[0059] In order to obtain a columnar strip with a spiral surface and a cross-section in the shape of a four-leaf clover, Example 2 of the present invention discloses a die with a cross-section profile in the shape of a four-leaf clover, and its structure is described in detail below with reference to the accompanying drawings.

[0060] refer to Figure 6 and Figure 7 The cross-sectional profile of the spiral discharge hole 10 on the die 1 is a four-leaf clover shape, that is, the spiral discharge hole 10 includes four rib grooves 11, and the four rib grooves 11 are evenly spaced and bent and wrapped around the hole wall of the spiral discharge hole 10 in parallel with each other.

[0061] When the cross-sectional profile of the spiral discharge hole 10 is a four-leaf clover shape, the cross-sectional profile of the spiral discharge hole 10 includes four arc segments, the arc diameters of the four arc segments are equal, and the angle formed by the connection between the centers of any two adjacent arc segments and the center of the spiral discharge hole 10 is 90 degrees.

[0062] The four-leaf clover shape is an outer contour composed of four arc segments of circles with equal diameters.

[0063] In order to overcome the problem of unclear shape of four-leaf clover, embodiment 2 of the present invention further provides a method for drawing the shape of four-leaf clover, so as to further enable those skilled in the art to understand the shape of four-leaf clover. Figure 8 , the four arc segments that make up the shape of the four-leaf clover surround a central circle, such as Figure 8 As shown in a. The diameter of the center circle is 2.4mm. Four points are evenly selected on the center circle as the centers of the four surrounding circles. The four surrounding circles are the circles where the four arc segments that make up the four-leaf clover shape are located. The diameter of the four surrounding circles is 2mm. Finally, the outer contour of the four surrounding circles is taken as the four-leaf clover shape, as shown in Figure 8 As shown in b.

[0064] Example 3: A production device for a columnar strip with spiral ribs on the surface

[0065] Embodiment 3 of the present invention provides a production device for columnar strips with spiral ribs on the surface, and its structure is described in detail below with reference to the accompanying drawings.

[0066] The production equipment of the columnar strip with spiral ribs on the surface includes at least one die 1 of embodiment 1 or embodiment 2 and a tubular screw conveyor.

[0067] refer to Figure 9 The tubular screw conveyor also includes a sleeve 2, a motor 3, a screw push rod 4 and a hopper 5, the screw push rod 4 is fixedly connected to the output shaft of the motor 3; the sleeve 2 is sleeved on the outside of the screw push rod 4; a feed port 41 is provided on the tube wall of the discharge end of the sleeve 2, the hopper 5 is provided at the feed port 41 of the sleeve 2, and the discharge port of the hopper 5 is communicated with the feed port 41 of the sleeve 2.

[0068] The hopper 5 is detachably mounted at the feed port 41 of the sleeve 2 via a connecting sleeve. Specifically, the connecting sleeve comprises an upper semicircular sleeve 61 and a lower semicircular sleeve 62, each of which is a half of a sleeve cut along a center line. When the inner walls of the upper semicircular sleeve 61 and the lower semicircular sleeve 62 respectively wrap around the sleeve 2, the upper semicircular sleeve 61 and the lower semicircular sleeve 62 form a complete sleeve that can wrap around the sleeve 2.

[0069] In order to connect the upper semicircular sleeve 61 and the lower semicircular sleeve 62, the edges on both sides of the upper semicircular sleeve 61 and the lower semicircular sleeve 62 protrude outward to form flanges 60, and each flange 60 is provided with a bolt hole. The flanges 60 on both sides of the upper semicircular sleeve 61 and the flanges 60 on both sides of the lower semicircular sleeve 62 are connected by bolts.

[0070] In order to ensure that the material is discharged from the discharge port of the hopper 5 to the feed port 41 of the sleeve 2, a raw material inlet 63 is provided on the upper semicircular sleeve 61, and the inner walls of the upper semicircular sleeve 61 and the lower semicircular sleeve 62 respectively wrap the feed port 41 of the sleeve 2, and the raw material inlet 63 of the upper semicircular sleeve 61 is opposite to and connected to the feed port 41 of the sleeve 2.

[0071] In order to connect the hopper 5 with the upper semicircular sleeve 61, the discharge port of the hopper 5 is aligned with the raw material inlet 63 of the upper semicircular sleeve 61 and is connected to each other by bolts. Specifically, the edges of the discharge port of the hopper 5 and the raw material inlet 63 of the upper semicircular sleeve 61 are respectively provided with flanges 60, and each flange 60 is respectively provided with a bolt hole. When the discharge port of the hopper 5 is aligned with the raw material inlet 63 of the upper semicircular sleeve 61, the discharge port of the hopper 5 and the flanges 60 on the edges of the raw material inlet 63 of the upper semicircular sleeve 61 are connected by bolts.

[0072] Continue to refer Figure 1 The discharge end of the sleeve 2 is provided with a finished material outlet 20 , the die 1 is provided at the finished material outlet 20 of the tubular screw conveyor, and each spiral discharge hole 10 of the die 1 is connected to the finished material outlet 20 .

[0073] As a specific example of realizing that the die 1 is arranged at the finished product outlet 20 of the sleeve 2, continue to refer to Figure 1 The port of the finished material outlet 20 of the sleeve 2 is fixed with a fixed flange 21, and the fixed flange 21 is provided with a movable flange 22. The movable flange 22 is connected to the fixed flange 21 by bolts, and the die 1 is clamped between the movable flange 22 and the fixed flange 21.

[0074] Among them, the feed port of the hopper 5 is used to input powder raw materials, which are 800g Al2O3 powder, 200g pseudo-boehmite, and 100g sesbania powder, which are evenly mixed with 1100g deionized water and 30g acetic acid to form a mixture diluted with acetic acid solution.

[0075] Example 4: A method for producing a columnar strip with spiral ribs on the surface

[0076] Example 4 of the present invention provides a method for producing a columnar strip having spiral ribs on its surface, using the production equipment for producing a columnar strip having spiral ribs on its surface of Example 1. The method comprises the following steps:

[0077] Step 1: Prepare powder

[0078] Take a large beaker, add 800g of Al2O3 powder, 200g of pseudo-boehmite, and 100g of sesbania powder in sequence, and stir thoroughly; take another beaker, add 1100g of deionized water and 30g of acetic acid in sequence and mix evenly to form an acetic acid solution; while stirring the mixed powder, slowly add the acetic acid solution to form a powder with appropriate moisture and particle size.

[0079] Step 2: Extrusion

[0080] The powder prepared in step 1 is slowly added to the above-mentioned production equipment, and the motor is operated at low speed and high torque to obtain a columnar material extrusion consistent with the shape of the die, which specifically includes the following steps:

[0081] Start the motor 3, which drives the screw push rod 4 to rotate;

[0082] The powdered raw material is put into the hopper 5, and the powdered raw material enters the feed port 41 of the sleeve 2 through the discharge port of the hopper 5;

[0083] During the rotation of the screw push rod 4, the powder raw materials entering from the feed port 41 of the sleeve 2 are driven to move forward until the powder raw materials are transported to the finished product outlet 20 of the sleeve 2;

[0084] The powdered raw material coming out of the finished material outlet 20 of the sleeve 2 enters into the plurality of spiral discharge holes 10 of the die 1 and is squeezed into strips in the spiral discharge holes 10 to form columnar strips with spiral ribs on the surface.

[0085] Step 3: Drying and crushing

[0086] The columnar strips with spiral ribs on the surface obtained in step 2 are placed in an oven and dried at 120° C. for 2 hours; the columnar strips with spiral ribs on the surface are taken out after drying and naturally cooled to room temperature, and then crushed into particles of 3-20 mm to obtain columnar particles with spiral ribs on the surface.

[0087] Step 4: High temperature roasting

[0088] The columnar particles with spiral ribs on the surface obtained in step 3 were placed in a muffle furnace, calcined at 580° C. for 6 hours, and then taken out and naturally cooled to room temperature.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A die, characterized in that: The die (1) is densely covered with a plurality of spiral discharge holes (10), and the center lines of the plurality of spiral discharge holes (10) are parallel to each other; Wherein, a plurality of strip rib grooves (11) are provided on the hole wall of the spiral discharge hole (10), each strip rib groove (11) is distributed in a spiral shape, and the plurality of strip rib grooves (11) are bent and wound parallel to each other on the hole wall of the spiral discharge hole (10); The spiral discharge hole (10) is used to extrude columnar strips with spiral ribs on the surface.

2. The die according to claim 1, wherein The die (1) is in the shape of a cylindrical disk, with a diameter of 75 mm and a thickness of 10 mm.

3. The die according to claim 1, wherein The cross-sectional profile of the spiral discharge hole (10) is a clover-shaped shape, that is, the spiral discharge hole (10) comprises three rib grooves (11), and the three rib grooves (11) are evenly spaced and parallel to each other and are bent and wound on the hole wall of the spiral discharge hole (10).

4. The die according to claim 3, wherein: When the cross-sectional profile of the spiral discharge hole (10) is a clover-shaped shape, the cross-sectional profile of the spiral discharge hole (10) includes three arc segments, the arc diameters of the three arc segments are equal, wherein the angle formed by the connection between the centers of any two arc segments and the center of the spiral discharge hole (10) is 120 degrees, and the connected arc ends are connected by an arc transition.

5. The die according to claim 1, wherein The cross-sectional profile of the spiral discharge hole (10) is a four-leaf clover shape, that is, the spiral discharge hole (10) includes four rib grooves (11), and the four rib grooves (11) are evenly spaced and parallel to each other and are bent and wound on the hole wall of the spiral discharge hole (10).

6. The die according to claim 5, characterized in that When the cross-sectional profile of the spiral discharge hole (10) is a four-leaf clover shape, the cross-sectional profile of the spiral discharge hole (10) includes four arc segments, the arc diameters of the four arc segments are equal, and the angle formed by the connection between the centers of any two adjacent arc segments and the center of the spiral discharge hole (10) is 90 degrees.

7. A production device for columnar strips with spiral ribs on the surface, characterized in that: The invention comprises a tubular screw conveyor and at least one die (1) according to any one of claims 1 to 6, wherein the tubular screw conveyor comprises a sleeve (2), a finished material outlet (20) is provided at the discharge end of the sleeve (2), the die (1) is arranged at the finished material outlet (20) of the tubular screw conveyor, and each spiral discharge hole (10) of the die (1) is connected to the finished material outlet (20); A fixed flange (21) is fixed to the end of the finished material outlet (20) of the sleeve (2), and the fixed flange (21) is provided with a movable flange (22). The movable flange (22) and the fixed flange (21) are connected by bolts, and the die (1) is clamped between the movable flange (22) and the fixed flange (21).

8. The production equipment of columnar strips with spiral ribs on the surface according to claim 7, characterized in that: The tubular screw conveyor further comprises a motor (3), a screw push rod (4) and a hopper (5). The screw push rod (4) is fixedly connected to the output shaft of the motor (3); The sleeve (2) is sleeved on the outside of the screw push rod (4); A feed port (41) is provided on the tube wall of the discharge end of the sleeve (2), the hopper (5) is provided at the feed port (41) of the sleeve (2), and the discharge port of the hopper (5) is communicated with the feed port (41) of the sleeve (2).

9. The production equipment of columnar strips with spiral ribs on the surface according to claim 8, characterized in that: The hopper (5) is detachably arranged at the feed port (41) of the sleeve (2) via a connecting sleeve. The connecting sleeve comprises an upper semicircular sleeve (61) and a lower semicircular sleeve (62), wherein the upper semicircular sleeve (61) and the lower semicircular sleeve (62) are respectively halves of a sleeve cut along a center line. When the inner walls of the upper semicircular sleeve (61) and the lower semicircular sleeve (62) respectively wrap around the sleeve (2), the upper semicircular sleeve (61) and the lower semicircular sleeve (62) just form a complete sleeve capable of wrapping around the sleeve (2); The edges of both sides of the upper semicircular sleeve (61) and the lower semicircular sleeve (62) protrude outward to form flanges (60), and each flange (60) is provided with a bolt hole. The flanges (60) on both sides of the upper semicircular sleeve (61) and the flanges (60) on both sides of the lower semicircular sleeve (62) are connected by bolts. The upper semicircular sleeve (61) is provided with a raw material inlet (63), the inner walls of the upper semicircular sleeve (61) and the lower semicircular sleeve (62) respectively wrap around the feed port (41) of the sleeve (2), and the raw material inlet (63) of the upper semicircular sleeve (61) is directly opposite to and communicates with the feed port (41) of the sleeve (2); The discharge port of the hopper (5) is directly opposite to the raw material inlet (63) of the upper semicircular sleeve (61) and is connected to each other via bolts.

10. A method for producing a columnar strip with spiral ribs on the surface, using the production equipment according to claim 8 or 9, characterized in that: include The motor (3) is started, and the motor (3) drives the screw push rod (4) to rotate; Powdered raw materials are put into the hopper (5), and the powdered raw materials enter the feed port (41) of the sleeve (2) through the discharge port of the hopper (5); During the rotation of the screw push rod (4), the powder raw materials entering from the feed port (41) of the sleeve (2) are driven to move forward until the powder raw materials are transported to the finished product outlet (20) of the sleeve (2); The powdered raw material coming out of the finished material outlet (20) of the sleeve (2) enters into the plurality of spiral discharge holes (10) of the die (1) and is squeezed into strips in the spiral discharge holes (10), generating columnar strips with spiral ribs on the surface.

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