A type of anti-slip striped pipe and its production equipment

Abstract

This invention belongs to the technical field of striped tubes, and relates to an anti-slip striped tube. The striped tube includes a main body and four axially arranged anti-slip stripes. The anti-slip stripes are evenly spaced on the outer wall of the main body. The anti-slip stripes and the main body are integrally extruded by a co-extrusion die. An anti-slip pattern pressed by an embossing device is provided on the outer wall of the anti-slip stripes. This invention further provides a production equipment for anti-slip striped tubes, the equipment including a co-extrusion die and an embossing device. The anti-slip striped tube provided by this invention has multiple anti-slip stripes and excellent anti-slip effect; the production equipment provided by this invention can extrude the main body and all anti-slip stripes of the striped tube in one operation, and press an anti-slip pattern onto all anti-slip stripes in one operation.

Description

Technical Field

[0001] This invention belongs to the technical field of striped tubes, and relates to an anti-slip striped tube and its production equipment. Background Technology

[0002] PVC pipe is a widely used pipe material, and in some applications, it has a high requirement for anti-slip properties. To improve the anti-slip effect, technicians pressed anti-slip stripes onto the outer wall of the PVC pipe. While this method enhances the anti-slip performance, pressing anti-slip stripes onto the main pipe significantly affects other properties of the main pipe. To avoid affecting the performance of the main pipe, technicians designed multi-layer pipes, co-extruding an anti-slip layer onto the main pipe and then pressing anti-slip stripes onto it. However, this method greatly increases the total thickness of the pipe, still affecting its overall performance and wasting a significant amount of material. To increase anti-slip performance without affecting the overall performance of the pipe and without wasting material, technicians designed striped pipes, with a thin, raised stripe on one side of the main pipe, and anti-slip patterns printed on the stripe. However, these single-sided anti-slip stripe methods offer limited improvement in anti-slip performance. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides an anti-slip striped tube and its production equipment. The striped tube has multiple anti-slip stripes and excellent anti-slip effect. The production equipment can extrude the main body of the striped tube and all the anti-slip stripes in one go, and press anti-slip patterns on all the anti-slip stripes in one go.

[0004] To solve the above-mentioned technical problems, the objective of this invention is achieved through the following technical solution:

[0005] An anti-slip striped tube includes a main body and four axially arranged anti-slip stripes. The anti-slip stripes are evenly spaced on the outer wall of the main body. The anti-slip stripes and the main body are integrally extruded by a co-extrusion die. The outer wall of the anti-slip stripes is provided with an anti-slip pattern pressed by an embossing device.

[0006] In the aforementioned anti-slip striped pipe, the anti-slip stripes are attached to the outer wall of the main pipe in an arc shape, and the included angle (the included angle of the central plane) of adjacent anti-slip stripes is 90°. The anti-slip stripes protrude slightly from the outer wall of the main pipe and form a smooth transition with the outer wall of the main pipe.

[0007] In the aforementioned type of anti-slip striped tube, the main body of the anti-slip striped tube can be a single-layer tube, a multi-layer tube, or a composite tube consisting of a multi-layer tube and a fabric reinforcement layer.

[0008] The present invention also provides a production equipment for anti-slip striped pipes, the production equipment comprising:

[0009] A co-extrusion die includes a co-extrusion head, a rear die, and a front die, all coaxially mounted on a die head. Through holes are provided along the axes of the co-extrusion head, rear die, and front die. The co-extrusion head and die head cooperate at the through holes to form an extrusion channel for the main body. A striped extrusion channel is provided between the rear die and the front die. The striped extrusion channel includes a main channel and four branch channels. The spacing between adjacent branch channels is the same. The ends of the branch channels communicate with the through holes to form an anti-slip striped extrusion channel.

[0010] An embossing device includes a vertical support and a horizontal support. An upper pressure roller and a lower pressure roller are rotatably mounted on the vertical support, and a left pressure roller and a right pressure roller are rotatably mounted on the horizontal support. A gap is formed between the upper and lower pressure rollers and between the left and right pressure rollers to allow the striped tube to pass through. Anti-slip patterns corresponding to four anti-slip stripes are respectively provided on the outer circumferential surfaces of the upper, lower, left, and right pressure rollers.

[0011] In the above-mentioned production equipment for anti-slip striped pipes, a secondary material injection port is provided on the side wall of the co-extrusion head. The secondary material injection port is connected to the secondary material inlet on the main channel. The secondary material inlet is located in the middle of the main channel. The secondary material is the material for extruding anti-slip stripes in a molten state, and the main material is the material for extruding the main body in a molten state.

[0012] In the aforementioned production equipment for anti-slip striped pipes, the main flow channel and the branch flow channel are formed by a groove provided on the front side of the rear mold and the rear side of the front mold. The rear side of the front mold is a smooth plane, and the rear mold is sealed to the front mold.

[0013] In the aforementioned production equipment for anti-slip striped pipes, the main flow channel and the branch flow channels are connected by intermediate flow channels. Two intermediate flow channels are provided, each corresponding to one of the two branch flow channels. The middle of each intermediate flow channel is connected to both ends of the main flow channel, and both ends of the intermediate flow channel are connected to the beginning ends of the two branch flow channels. The branch flow channels are arranged radially, and their width gradually narrows from the beginning to the end. The main flow channel and the intermediate flow channels are distributed circumferentially. Specifically, the centerline angle between adjacent branch flow channels is 90°; the intermediate flow channels are both 90-degree arc-shaped flow channels, and the two intermediate flow channels are symmetrically arranged; the main flow channel is a 180-degree arc-shaped flow channel; from the outside to the inside, they are the main flow channel, the intermediate flow channel, and the branch flow channels.

[0014] In the aforementioned production equipment for anti-slip striped pipes, the rear side of the co-extrusion head is provided with an internal thread that is screwed into the die head, and the co-extrusion head, the rear die, and the front die are fastened together by a number of die bolts parallel to the axis.

[0015] In the aforementioned production equipment for anti-slip striped tubes, both the vertical and horizontal supports are mounted on the same L-shaped main support. Preferably, the vertical and horizontal supports are arranged sequentially on the main support. The main support includes a horizontal plane, a first vertical plane, and a second vertical plane. The first vertical plane is parallel to the output direction of the striped tube, and the second vertical plane is perpendicular to the output direction of the striped tube. The horizontal support is mounted on the horizontal plane, and the vertical support is mounted on the first vertical plane. The second vertical plane is connected to a mounting plate that is connected to the machine frame. Preferably, the first vertical plane is closer to the pressure roller than the second vertical plane, and the first and second vertical planes connect to form an L-shape.

[0016] In the aforementioned production equipment for anti-slip striped pipes, the upper pressure roller, lower pressure roller, left pressure roller, and right pressure roller are provided with the same anti-slip pattern, which is an anti-slip raised texture spaced apart along the axial direction. Of course, the upper pressure roller, lower pressure roller, left pressure roller, and right pressure roller can also be provided with different anti-slip patterns, such as diagonal stripes, cross stripes, etc.

[0017] In the aforementioned production equipment for anti-slip striped tubes, a horizontal strip groove is provided on the horizontal plane, and a left bolt and a right bolt are provided on the horizontal support. One end of the left bolt and the right bolt are adjustablely fixed in the horizontal strip groove, and the other end of the left bolt and the right bolt are respectively fixed to a left rotating shaft and a right rotating shaft. The left pressure roller and the right pressure roller are respectively rotatably connected to the left rotating shaft and the right rotating shaft. A vertical strip groove is provided on the first vertical plane, and an upper bolt and a lower bolt are provided on the vertical support. One end of the upper bolt and the lower bolt are adjustablely fixed in the vertical strip groove, and the other end of the upper bolt and the lower bolt are respectively fixed to an upper rotating shaft and a lower rotating shaft. The upper pressure roller and the lower pressure roller are respectively rotatably connected to the upper rotating shaft and the lower rotating shaft. Furthermore, each of the above-mentioned rotating shafts is locked to each bolt by a nut, and each of the above-mentioned pressure rollers is rotatably mounted on each rotating shaft by a bearing or a sleeve.

[0018] In the aforementioned production equipment for anti-slip striped pipes, a horizontal slider is slidably mounted inside the horizontal support, and a right bolt is fixed to the horizontal slider. A horizontal adjusting bolt, fixedly connected to the horizontal slider, is screwed to the right end of the horizontal support. A vertical slider is slidably mounted inside the vertical support, and an upper bolt is fixed to the vertical slider. A vertical adjusting bolt, fixedly connected to the vertical slider, is screwed to the upper end of the vertical support. Furthermore, each adjusting bolt has an expansion joint at its end, and each slider has a T-groove fixedly connected to the expansion joint at its end.

[0019] In the aforementioned production equipment for anti-slip striped pipes, the mounting plate is securely connected to the machine frame by several bolts. The mounting plate has vertically adjustable mounting grooves. The mounting plate can be adjusted vertically via these grooves. The embossing device can be rotated as a whole to achieve tilting placement to accommodate other types of material discharge.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. This invention provides a new type of anti-slip striped pipe with four anti-slip stripes. It can greatly increase the anti-slip performance of the striped pipe without affecting the performance of the main body, while having a smaller material consumption.

[0022] 2. The co-extrusion mold for anti-slip striped pipe provided by this invention can form striped pipes with multiple anti-slip stripes in one step, filling the gap in the production mold for anti-slip striped pipes. The original flow channel design of this invention has a simple structure, smooth material flow, and can uniformly form multiple anti-slip stripes.

[0023] 3. The embossing device for anti-slip striped tubes provided by this invention can press stripes onto four anti-slip stripes at once, filling a gap in the market for anti-slip striped tube embossing devices. The embossing device of this invention can be adjusted in multiple dimensions, thereby adapting to more specifications of anti-slip striped tubes. Attached Figure Description

[0024] Figure 1 This is a perspective view of the striped tube of the present invention;

[0025] Figure 2 This is a side view of the striped tube of the present invention;

[0026] Figure 3 This is a perspective view of the production equipment of this invention;

[0027] Figure 4 This is a perspective view of the co-extrusion die of the present invention.

[0028] Figure 5 This is an exploded view of the co-extrusion die of the present invention;

[0029] Figure 6 This is a schematic diagram of the flow channel structure of the co-extrusion die of the present invention;

[0030] Figure 7 This is a perspective view of the embossing device of the present invention;

[0031] Figure 8 This is a front view of the embossing device of the present invention;

[0032] Figure 9 This is a side view of the embossing device of the present invention;

[0033] Figure 10 This is a top view of the embossing device of the present invention;

[0034] Figure 11 This is a schematic diagram of the main support structure of the embossing device of the present invention;

[0035] Reference numerals: 1. Main body; 2. Anti-slip stripes; 3. Co-extrusion head; 4. Rear die; 5. Front die; 6. Main runner; 7. Branch runner; 8. Vertical support; 9. Horizontal support; 10. Upper pressure roller; 11. Lower pressure roller; 12. Left pressure roller; 13. Right pressure roller; 14. Secondary material inlet; 15. Secondary material inlet; 16. Intermediate runner; 17. Die bolt; 18. Main support; 19. Horizontal plane; 20. 21. First vertical plane; 22. Second vertical plane; 23. Mounting plate; 24. Horizontal strip groove; 25. Left bolt; 26. Right bolt; 27. Left pivot; 28. Right pivot; 29. ​​Vertical strip groove; 30. Upper bolt; 31. Lower bolt; 32. Upper pivot; 33. Lower pivot; 34. Horizontal slider; 35. Horizontal adjusting bolt; 36. Vertical slider; 37. Vertical adjusting bolt; 38. Mounting strip groove. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-11 :

[0037] An anti-slip striped tube, the striped tube includes a main body 1 and four axially arranged anti-slip stripes 2, the anti-slip stripes 2 are evenly spaced on the outer wall of the main body 1, the anti-slip stripes 2 and the main body 1 are integrally extruded by a co-extrusion die, and the outer wall of the anti-slip stripes 2 is provided with an anti-slip pattern pressed by an embossing device.

[0038] Comparison Appendix Figure 1 and attached Figure 2 The anti-slip stripes 2 are attached to the outer wall of the main body 1 in an arc shape. The included angle (included angle of the central plane) of adjacent anti-slip stripes 2 is 90°. The anti-slip stripes 2 protrude slightly from the outer wall of the main body 1 and form a smooth transition with the outer wall of the main body 1.

[0039] The main body 1 of the aforementioned anti-slip striped tube can be a single-layer tube, a multi-layer tube, or a composite tube consisting of a multi-layer tube and a fabric reinforcement layer. (Refer to the attached diagram.) Figure 2 In this embodiment, the tube is a composite tube with a multi-layer tube body and a fabric reinforcement layer.

[0040] Comparison Appendix Figure 3 A production equipment for anti-slip striped pipes, the production equipment comprising:

[0041] The co-extrusion die includes a co-extrusion head 3, a rear die 4, and a front die 5 coaxially mounted on the die head. Through holes are provided at the axes of the co-extrusion head 3, the rear die 4, and the front die 5. The co-extrusion head 3 and the die head cooperate with the through holes to form the extrusion channel of the main body 1. A striped extrusion channel is provided between the rear die 4 and the front die 5. The striped extrusion channel includes a main channel 6 and four branch channels 7. The spacing between adjacent branch channels 7 is the same. The end of the branch channel 7 communicates with the through hole and forms the extrusion channel of the anti-slip stripes 2.

[0042] The embossing device includes a vertical support 8 and a horizontal support 9. An upper pressure roller 10 and a lower pressure roller 11 are rotatably arranged on the vertical support 8. A left pressure roller 12 and a right pressure roller 13 are rotatably arranged on the horizontal support 9. A gap is formed between the upper pressure roller 10 and the lower pressure roller 11, and between the left pressure roller 12 and the right pressure roller 13, for the striped tube to pass through. Anti-slip patterns corresponding to the four anti-slip stripes 2 are respectively provided on the outer peripheral surfaces of the upper pressure roller 10, the lower pressure roller 11, the left pressure roller 12, and the right pressure roller 13.

[0043] During production, the molten main material flows out from the die head of the extruder. A tubular flow channel is formed between the inner core of the die head and the through hole of the co-extrusion head 3. After the material flows out from this flow channel, it forms the main body 1. At the same time, the molten secondary material flows from the main flow channel 6 to the branch flow channel 7, which divides the secondary material into multiple secondary materials that are individually formed into anti-slip stripes 2. The secondary materials flow to the main body 1 through each branch flow channel 7 and adhere to the outer wall of the main body 1 to form anti-slip stripes 2. Then, the extruded striped tube passes through the embossing device. The four anti-slip stripes 2 on the forward-moving striped tube drive the upper pressure roller 10, lower pressure roller 11, left pressure roller 12, and right pressure roller 13 to roll respectively. The rolling upper pressure roller 10, lower pressure roller 11, left pressure roller 12, and right pressure roller 13 press the corresponding anti-slip patterns on the four anti-slip stripes 2 respectively.

[0044] The equipment of the present invention can be used in conjunction with any existing PVC pipe production equipment: for example, extrusion equipment for extruding single-layer pipe bodies, multi-layer pipe bodies, and composite pipe bodies.

[0045] Comparison Appendix Figure 4 and attached Figure 5 To facilitate the injection of auxiliary materials, an auxiliary material injection port 14 is provided on the side wall of the co-extrusion head 3. The auxiliary material injection port 14 is connected to the auxiliary material inlet 15 on the main channel 6. The auxiliary material inlet 15 is located in the middle of the main channel 6. The auxiliary material is the material of the extruded anti-slip stripe 2 in a molten state, and the main material is the material of the extruded main body 1 in a molten state. The auxiliary material injection port 14 is connected to the auxiliary material preparation equipment.

[0046] For ease of processing, the main channel 6 and the branch channel 7 are surrounded by a groove on the front side of the rear mold 4 and the rear side of the front mold 5. The rear side of the front mold 5 is a smooth plane. The rear mold 4 and the front mold 5 are sealed together to prevent secondary materials from seeping out of the stripes and being squeezed out of the channel.

[0047] Comparison Appendix Figure 6 To ensure that the material in the main channel 6 flows evenly into the branch channels 7, the main channel 6 and the branch channels 7 are connected by intermediate channels 16. Two intermediate channels 16 are provided, each corresponding to one of the two branch channels 7. The middle of the intermediate channel 16 is connected to both ends of the main channel 6, and both ends of the intermediate channel 16 are connected to the beginning ends of the two branch channels 7. The branch channels 7 are arranged radially, and their width gradually narrows from the beginning to the end. This type of branch channel 7 allows the secondary material in the branch channels 7 to flow out more smoothly. The main channel 6 and the intermediate channels 16 are distributed circumferentially. Specifically, the centerline angle between adjacent branch channels 7 is 90°; the intermediate channels 16 are both 90-degree arc-shaped channels, and the two intermediate channels 16 are symmetrically arranged; the main channel 6 is a 180-degree arc-shaped channel; from the outside to the inside, they are the main channel 6, the intermediate channels 16, and the branch channels 7.

[0048] During operation, the auxiliary material is injected through the auxiliary material injection port 14, and then enters the main channel 6 through the auxiliary material inlet 15. The auxiliary material entering the main channel 6 flows to both sides and then enters its corresponding intermediate channel 16. The auxiliary material entering the intermediate channel 16 flows to both sides again and then enters its corresponding branch channel 7. Finally, it flows out through the end of the branch channel 7.

[0049] The rear side of the co-extrusion head 3 is provided with an internal thread for screwing into the die head. The co-extrusion head 3, the rear die 4 and the front die 5 are fastened together by a number of die bolts 17 parallel to the axis.

[0050] Comparison Appendix Figure 7-11 In this embodiment, the installation structure of the vertical support 8 and the horizontal support 9 is as follows: both the vertical support 8 and the horizontal support 9 are installed on the same L-shaped main support 18. Preferably, the vertical support 8 and the horizontal support 9 are arranged sequentially on the main support 18. The main support 18 includes a horizontal plane 19, a first vertical plane 20, and a second vertical plane 21. The first vertical plane 20 is parallel to the output direction of the stripe tube, and the second vertical plane 21 is perpendicular to the output direction of the stripe tube. The horizontal support 9 is installed on the horizontal plane 19, and the vertical support 8 is installed on the first vertical plane 20. The second vertical plane 21 is connected to a mounting plate 22 that is connected to the frame. Preferably, the first vertical plane 20 is closer to the pressure roller than the second vertical plane 21, and the first vertical plane and the second vertical plane 21 are connected to form an L-shape.

[0051] To meet different anti-slip requirements, the upper pressure roller 10, lower pressure roller 11, left pressure roller 12, and right pressure roller 13 are provided with the same anti-slip pattern, which is an anti-slip raised texture spaced apart along the axial direction. Of course, the upper pressure roller 10, lower pressure roller 11, left pressure roller 12, and right pressure roller 13 can also be provided with different anti-slip patterns, such as diagonal lines, cross lines, etc.

[0052] The specific installation structure of each pressure roller in the embodiment is as follows: A horizontal strip groove 23 is provided on the horizontal plane 19, and a left bolt 24 and a right bolt 25 are provided on the horizontal support 9. One end of the left bolt 24 and the right bolt 25 is adjustablely fixed in the horizontal strip groove 23, and the other end of the left bolt 24 and the right bolt 25 is respectively fixed to a left rotating shaft 26 and a right rotating shaft 27. The left pressure roller 12 and the right pressure roller 13 are respectively rotatably connected to the left rotating shaft 26 and the right rotating shaft 27. A vertical strip groove 28 is provided on the first vertical plane 20, and an upper bolt 29 and a lower bolt 30 are provided on the vertical support 8. One end of the upper bolt 29 and the lower bolt 30 is adjustablely fixed in the vertical strip groove 28, and the other end of the upper bolt 29 and the lower bolt 30 is respectively fixed to an upper rotating shaft 31 and a lower rotating shaft 32. The upper pressure roller 10 and the lower pressure roller 11 are respectively rotatably connected to the upper rotating shaft 31 and the lower rotating shaft 32. Furthermore, in this embodiment, each of the aforementioned rotating shafts is locked to each of the bolts by nuts, and each of the aforementioned pressure rollers is rotatably mounted on each of the rotating shafts by bearings or sleeves. Simultaneously, the above structure can also achieve synchronous adjustment of the upper pressure roller 10, lower pressure roller 11, left pressure roller 12, and right pressure roller 13. By loosening each locking component and adjusting the horizontal position of the horizontal bracket 9, the horizontal positions of the left pressure roller 12 and right pressure roller 13 can be adjusted; by adjusting the vertical position of the vertical bracket 8, the vertical positions of the upper pressure roller 10 and lower pressure roller 11 can be adjusted. After adjustment, each locking component is re-locked.

[0053] This embodiment adjusts the relative positions of the upper pressure roller 10 and the lower pressure roller 11, and the relative positions of the left pressure roller 12 and the right pressure roller 13 through the following structure: A horizontal slider 33 is slidably mounted inside the horizontal support 9, and the right bolt 25 is fixed to the horizontal slider 33. A horizontal adjusting bolt 34, fixedly connected to the horizontal slider 33, is screwed to the right end of the horizontal support 9. A vertical slider 35 is slidably mounted inside the vertical support 8, and the upper bolt 29 is fixed to the vertical slider 35. A vertical adjusting bolt 36, fixedly connected to the vertical slider 35, is screwed to the upper end of the vertical support 8. Furthermore, each adjusting bolt has an expansion joint at its end, and each slider has a T-groove fixedly connected to the expansion joint at its end. When adjusting the relative position of the left pressure roller 12 and the right pressure roller 13, first loosen the locking device between the right bolt 25 and the horizontal strip groove 23. Then, rotate the horizontal adjusting bolt 34 to drive the horizontal slider 33 to slide, thereby adjusting the relative position of the right bolt 25 and the left bolt 24, i.e., the right pressure roller 13 and the left pressure roller 12. At the same time, the right bolt 25 slides in the horizontal strip groove 23. After adjustment, tighten the bolt. When adjusting the relative position of the upper pressure roller 10 and the lower pressure roller 11, first loosen the locking device between the upper bolt 29 and the vertical strip groove 28. Then, rotate the vertical adjusting bolt 36 to drive the vertical slider 35 to slide, thereby adjusting the relative position of the upper bolt 29 and the lower bolt 30, i.e., the upper pressure roller 10 and the lower pressure roller 11. At the same time, the upper bolt 29 slides in the vertical strip groove 28. After adjustment, tighten the bolt.

[0054] In this embodiment, the position of the mounting plate 22 is adjusted, i.e., the overall position of the embossing device is adjusted, through the following structure: the mounting plate 22 is fastened to the frame with several bolts, and the mounting plate 22 has an adjustable mounting groove 37 along the vertical direction. The mounting plate 22 can be adjusted vertically through the mounting groove 37. The embossing device can be rotated as a whole to achieve tilting placement to adapt to other forms of material discharge.

[0055] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A production equipment for manufacturing anti-slip striped tubes, characterized in that, The striped tube includes a main body (1) and four axially arranged anti-slip stripes (2). The anti-slip stripes (2) are evenly spaced on the outer wall of the main body (1). The anti-slip stripes (2) and the main body (1) are integrally extruded by a co-extrusion die. The outer wall of the anti-slip stripes (2) is provided with an anti-slip pattern pressed by an embossing device. The production equipment includes: The co-extrusion die includes a co-extrusion head (3), a rear die (4), and a front die (5) coaxially mounted on the die head. The co-extrusion head (3), the rear die (4), and the front die (5) are provided with through holes at their axes. The co-extrusion head (3) and the die head cooperate with each other at the through holes to form an extrusion channel for the main body (1). A striped extrusion channel is provided between the rear die (4) and the front die (5). The striped extrusion channel includes a main channel (6) and four branch channels (7). The spacing between adjacent branch channels (7) is the same. The end of each branch channel (7) is connected to the through hole and forms an extrusion channel for anti-slip stripes (2). Embossing device, the embossing device includes a vertical support (8) and a horizontal support (9). The vertical support (8) is rotatably equipped with an upper pressure roller (10) and a lower pressure roller (11) distributed vertically. The horizontal support (9) is rotatably equipped with a left pressure roller (12) and a right pressure roller (13) distributed horizontally. A gap is formed between the upper pressure roller (10) and the lower pressure roller (11), and between the left pressure roller (12) and the right pressure roller (13) for the striped tube to pass through. The outer circumferential surfaces of the upper pressure roller (10), the lower pressure roller (11), the left pressure roller (12), and the right pressure roller (13) are respectively provided with anti-slip patterns corresponding to the four anti-slip stripes (2). The co-extrusion head (3) is provided with a secondary material injection port (14) on its side wall. The secondary material injection port (14) is connected to the secondary material inlet (15) on the main channel (6). The secondary material inlet (15) is located in the middle of the main channel (6). The main channel (6) and the branch channel (7) are surrounded by a groove on the front side of the rear mold (4) and the rear side of the front mold (5). The rear side of the front mold (5) is a smooth plane. The rear mold (4) and the front mold (5) are sealed together. The main channel (6) and the branch channel (7) are connected by an intermediate channel (16). There are two intermediate channels (16), which correspond to the two branch channels (7) respectively. The middle part of the intermediate channel (16) is connected to both ends of the main channel (6). The two ends of the intermediate channel (16) are connected to the beginning ends of the two branch channels (7) respectively. The branch channels (7) are arranged radially, and the width of the branch channels (7) gradually narrows from the beginning end to the end end. The main channel (6) and the intermediate channel (16) are distributed circumferentially.

2. The production equipment for anti-slip striped pipes according to claim 1, characterized in that, The rear side of the co-extrusion head (3) is provided with an internal thread that is screwed into the die head. The co-extrusion head (3), the rear die (4) and the front die (5) are fastened together by a number of die bolts (17) parallel to the axis.

3. The production equipment for anti-slip striped pipes according to claim 1, characterized in that, The vertical support (8) and the horizontal support (9) are both mounted on the same L-shaped main support (18). The main support (18) includes a horizontal plane (19), a first vertical plane (20) and a second vertical plane (21). The first vertical plane (20) is parallel to the output direction of the stripe tube, and the second vertical plane (21) is perpendicular to the output direction of the stripe tube. The horizontal support (9) is mounted on the horizontal plane (19), and the vertical support (8) is mounted on the first vertical plane (20). The second vertical plane (21) is connected to a mounting plate (22) that is connected to the frame.

4. The production equipment for anti-slip striped pipes according to claim 3, characterized in that, A horizontal strip groove (23) is provided on the horizontal plane (19), and a left bolt (24) and a right bolt (25) are provided on the horizontal support (9). One end of the left bolt (24) and the right bolt (25) is adjustablely fixed in the horizontal strip groove (23), and the other end of the left bolt (24) and the right bolt (25) are respectively fixed with a left rotating shaft (26) and a right rotating shaft (27). The left pressure roller (12) and the right pressure roller (13) are rotatably connected to the left rotating shaft (26) and the right rotating shaft (27) respectively. A vertical strip groove (28) is provided on the first vertical plane (20). An upper bolt (29) and a lower bolt (30) are provided on the vertical support (8). One end of the upper bolt (29) and the lower bolt (30) is adjustablely fixed in the vertical strip groove (28). The other end of the upper bolt (29) and the lower bolt (30) are respectively fixed with an upper rotating shaft (31) and a lower rotating shaft (32). The upper pressure wheel (10) and the lower pressure wheel (11) are rotatably connected to the upper rotating shaft (31) and the lower rotating shaft (32) respectively.

5. The production equipment for anti-slip striped pipes according to claim 4, characterized in that, A horizontal slider (33) is slidably provided inside the horizontal support (9), and the right bolt (25) is fixed on the horizontal slider (33). A horizontal adjusting bolt (34) is screwed to the right end of the horizontal support (9) and fixedly connected to the horizontal slider (33). A vertical slider (35) is slidably provided inside the vertical support (8), and the upper bolt (29) is fixed on the vertical slider (35). A vertical adjusting bolt (36) is screwed to the upper end of the vertical support (8) and fixedly connected to the vertical slider (35).

6. The production equipment for anti-slip striped pipes according to claim 3, characterized in that, The mounting plate (22) is fastened to the frame by several bolts, and the mounting plate (22) is provided with an adjustable mounting slot (37) along the vertical direction.

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