Extrusion die and ribbed water supply pipe

Abstract

The utility model provides an extrusion die and a ribbed water supply pipe. The extrusion die comprises a die holder, a die cover, a die core and a die cover, a mounting hole is formed in the die holder, a material runner is formed in the die holder, and the mounting hole is sleeved with the material runner; a mold core; a plurality of first forming grooves are formed in the inner surface of the mouth mold, and the first forming grooves are distributed around the axis of the mouth mold; wherein the die core is inserted into the mounting hole, the die core is sleeved with the mouth die, an extrusion channel is formed between the mouth die and the die core, and the material runner is communicated with the extrusion channel; in addition, the first forming groove is configured to form ribs on the outer pipe wall of the pipe body extruded and formed through the extrusion die. The reinforcing ribs are formed on the pipe body while the pipe body is extruded, so that the structural strength of the ribbed water supply pipe produced by the extrusion die is improved, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of machinery, in particular to an extrusion die and a ribbed water supply pipe. Background Art

[0002] Plastic pipes such as drip irrigation pipes are generally processed by extrusion molding. For this purpose, an extruder is configured with an extruder head. After the extruder heats and melts the plastic raw materials, it extrudes them from the extruder head to form a tubular product. For example, Chinese patent announcements CN110328824 A and CN112590168A respectively disclose heads used in conjunction with extruders, and the heads usually include components such as a die base, a mouth die, and a core rod. The existing drip irrigation pipes used in agricultural irrigation are formed by extruding the head to form a water supply pipe, and then corresponding drippers (such as sheet drippers or round drippers) are set on the water supply pipe to achieve the corresponding functions. However, when the drip irrigation pipe is rolled up and unrolled, it is easy to break due to excessive force on the pipe body, which leads to reduced reliability of use. In view of this, how to design a technology to improve the tensile strength and water pressure resistance of the water supply pipe to improve product quality is the technical problem to be solved by the utility model. Utility Model Content

[0003] The utility model provides an extrusion die and a ribbed water supply pipe, which realizes forming reinforcing ribs on a pipe body while extruding the pipe body, thereby improving the structural strength of the ribbed water supply pipe produced by the extrusion die to improve the quality of the product.

[0004] The utility model provides an extrusion die, comprising:

[0005] A die base, wherein a mounting hole is provided on the die base, a material flow channel is formed in the die base, and the material flow channel is sleeved outside the mounting hole;

[0006] Mold core;

[0007] A die, wherein the inner surface of the die is provided with a plurality of first forming grooves, and the plurality of first forming grooves are distributed around the axis of the die;

[0008] The mold core is inserted into the mounting hole, the die is sleeved on the mold core, an extrusion channel is formed between the die and the mold core, and the material flow channel is connected to the extrusion channel;

[0009] In addition, the first molding groove is configured to form ribs on the outer tube wall of the tube body extruded by the extrusion die.

[0010] Furthermore, a plurality of second molding grooves are arranged on the outer surface of the mold core, and the plurality of second molding grooves are distributed around the axis of the mold core;

[0011] Wherein, the second molding groove is configured to form ribs on the inner tube wall of the tube body extruded by the extrusion die.

[0012] Furthermore, the first forming groove has a straight portion and a curved portion; along the material output direction of the extrusion channel, the curved portion and the straight portion are arranged in sequence.

[0013] Furthermore, the die is also provided with at least one pair of auxiliary molding grooves arranged side by side on the inner surface, and the width of the auxiliary molding grooves is greater than the width of the first molding grooves; each pair of the auxiliary molding grooves is configured to form two patch reinforcement ribs arranged side by side on the outer tube wall of the tube body extruded by the extrusion die.

[0014] The utility model also provides an extrusion die, comprising:

[0015] A die base, wherein a mounting hole is provided on the die base, a material flow channel is formed in the die base, and the material flow channel is sleeved outside the mounting hole;

[0016] A mold core, wherein a plurality of third molding grooves are arranged on the outer surface of the mold core, and the plurality of third molding grooves are distributed around the axis of the mold core;

[0017] Mouth mould;

[0018] The mold core is inserted into the mounting hole, the die is sleeved on the mold core, an extrusion channel is formed between the die and the mold core, and the material flow channel is connected to the extrusion channel;

[0019] In addition, the third molding groove is configured to form ribs on the inner tube wall of the tube body extruded by the extrusion die.

[0020] Furthermore, a through installation channel is formed in the die base, one end of the through installation channel is formed as a installation hole, the installation hole forms a conical structure, the outer circumferential surface of the mold core is provided with a conical surface matching the installation hole, and the outer circumferential surface of the die is provided with a cylindrical positioning surface;

[0021] The extrusion die also includes an installation and adjustment component, which includes a flange gland, a pressing sleeve, a pressing ring and a plurality of adjustment bolts; a plurality of adjustment threaded through holes are arranged on the outer circumference of the flange gland, a positioning guide hole is formed on the pressing sleeve, and the inner surface of the positioning guide hole forms a cylindrical positioning surface matching the cylindrical positioning surface, the adjustment bolt is threadedly connected in the adjustment threaded through hole, the pressing ring is detachably mounted on the end surface of the pressing sleeve, the flange gland is sleeved on the outside of the pressing sleeve and the pressing ring, and the adjustment bolt abuts against the outer circumference of the pressing sleeve;

[0022] The conical surface is pressed against the hole wall of the mounting hole, the flange cover is arranged on the die base, the mouth die is inserted into the positioning guide hole and clamped between the pressure ring and the die base.

[0023] Furthermore, a disassembly hole is formed at the other end of the through-mounting passage, and the opening size of the mounting hole is larger than the opening size of the disassembly hole; the inner end surface of the mold core is exposed in the disassembly hole.

[0024] Furthermore, it also includes a disassembly push rod; the end of the disassembly push rod forms a supporting portion, and the supporting portion is a cone head structure or a hemispherical head structure.

[0025] The utility model also provides a ribbed water supply pipe processed by the extrusion die, wherein the outer pipe wall of the ribbed water supply pipe is provided with outer ribs protruding toward the outside.

[0026] Furthermore, the outer tube wall of the ribbed water supply pipe is provided with inner ribs protruding inwards.

[0027] Furthermore, two patch reinforcement ribs arranged side by side are provided on the outer tube wall of the ribbed water supply pipe, and the width of the patch reinforcement ribs is greater than the width of the outer ribs.

[0028] The utility model also provides a ribbed water supply pipe processed by the extrusion die, wherein the outer pipe wall of the ribbed water supply pipe is provided with inner ribs protruding toward the inside.

[0029] The extrusion die and ribbed water supply pipe provided by the utility model are provided with forming grooves on the die core and / or the die mouth, and the forming grooves can shape the extruded material entering the extrusion channel in the extrusion channel, so that protruding ribs are formed on the pipe wall of the water supply pipe extruded from the extrusion channel, and the ribs are extruded integrally with the water supply pipe, so that the ribs will extend along the length direction of the water supply pipe. In this way, the ribs can effectively enhance the tensile strength and water pressure resistance of the water supply pipe to improve product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a cross-sectional view of an embodiment of the ribbed water supply pipe of the utility model;

[0031] Figure 2 This is an assembly diagram of the extrusion die and the extruder of the utility model;

[0032] Figure 3 for Figure 2 A cross-sectional view of the extrusion die;

[0033] Figure 4 for Figure 3 A partial enlarged schematic diagram of the middle A area;

[0034] Figure 5 for Figure 3 Schematic diagram of the structure of the center die;

[0035] Figure 6 for Figure 3 Cross-sectional view of the center die;

[0036] Figure 7 for Figure 3 One of the structural diagrams of the middle mold core;

[0037] Figure 8 for Figure 3 The second structural diagram of the middle mold core;

[0038] Fig. 9 for Figure 2 Schematic diagram of the partial structure of the extrusion die;

[0039] Fig.10 for Fig. 9 Middle BB section view;

[0040] Fig.11 for Fig.10 A partial enlarged schematic diagram of the middle C area;

[0041] Fig.12 for Figure 3 Schematic diagram of the structure of the middle flange gland;

[0042] Fig.13 for Figure 3 One of the structural diagrams of the medium-pressure sleeve;

[0043] Fig.14 for Figure 3 The second structural diagram of the medium pressure sleeve. DETAILED DESCRIPTION

[0044] Embodiment 1, as Figure 1-Figure 6 As shown, an embodiment of the present application provides an extrusion die for processing and producing a ribbed water supply pipe, wherein a protruding rib 1001 is formed on the pipe wall of the water supply pipe 1000 processed and formed by the extrusion die. According to processing requirements, the rib 1001 protruding outwards can be formed on the outer pipe wall of the water supply pipe 1000; the rib 1001 protruding inwards can also be formed on the inner pipe wall of the water supply pipe 1000; or the protruding rib 1001 can be formed on both the inner and outer pipe walls of the water supply pipe 1000.

[0045] Since the ribs 1001 extend along the length direction of the water supply pipe 1000 and are integrally formed on the water supply pipe 1000, the ribs 1001 can effectively enhance the tensile strength and water pressure resistance of the water supply pipe 1000, thereby reducing the occurrence of the water supply pipe being pulled apart when winding and unwinding the water supply pipe, and improving the reliability of use during the water supply process.

[0046] The extrusion die includes a die base 1, a die core 2 and a die mouth 3. In order to form ribs 1001 on the wall of the water supply pipe 1000 during the extrusion of the water supply pipe 1000, the die core 2 and / or the die mouth 3 may be improved, as described below with reference to the accompanying drawings.

[0047] The die base 1 is provided with a mounting hole 111, and a material flow channel 12 is formed in the die base 1. The material flow channel 12 is sleeved outside the mounting hole 111. The inner surface of the die 3 is provided with a plurality of first forming grooves 32, and the plurality of first forming grooves 32 are distributed around the axis of the die 3.

[0048] Among them, the core mold 2 is inserted into the mounting hole 111, the mouth die 3 is sleeved on the core mold 2, an extrusion channel 20 is formed between the mouth die 3 and the core mold 2, and the material flow channel 12 is connected to the extrusion channel 20; in addition, the first molding groove 32 is configured to form ribs on the outer tube wall of the tube body extruded by the extrusion die.

[0049] Specifically, in actual use, the extrusion die will be installed on the extrusion head of the extruder, and the material extruded by the extruder through the extrusion head will flow into the extrusion die, and the material will flow into the extrusion channel 20 through the material flow channel 12, and finally be extruded to form a water supply pipe.

[0050] After the material enters the extrusion channel, part of the material will flow into the first molding groove 32 during the extrusion process, and finally form ribs 1001 on the wall of the extruded water supply pipe 1000 under the shaping effect of the first molding groove 32.

[0051] Since the first forming groove 32 is formed on the inner surface of the die 3 , ribs 1001 can be formed on the outer tube wall of the water supply pipe.

[0052] Preferably, in order to ensure that the material can smoothly enter the first molding groove 32 , the first molding groove 32 has a straight portion 321 and a curved portion 322 ; along the material output direction of the extrusion channel 20 , the curved portion 322 and the straight portion 321 are arranged in sequence.

[0053] Specifically, the curved portion 322 can guide the material entering the extrusion flow channel to smoothly enter the first molding groove 32, and the material flows to the straight portion 321 through the curved portion 322, and then the straight portion 321 is used to form ribs 1001 on the outer tube wall of the water supply pipe.

[0054] In certain embodiments, when a sheet dripper needs to be built into the water supply pipe, in order to improve the bonding reliability of the sheet dripper, the inner surface of the die 3 may be provided with at least one pair of auxiliary molding grooves 33 arranged side by side, and the width of the auxiliary molding grooves 33 is greater than the width of the first molding groove 32; each pair of the auxiliary molding grooves 33 is configured to form two side-by-side patch reinforcement ribs 1002 on the outer tube wall of the tube body extruded by the extrusion die.

[0055] Specifically, during the extrusion process, after the tube body is extruded, the sheet dripper is directly attached to the inner wall of the tube body, and the two sides of the sheet dripper are attached to the corresponding outer side of the inner wall of the tube body with the patch reinforcement ribs 1002, and then the patch reinforcement ribs 1002 are used to increase the thickness of the tube body for bonding the sheet dripper, thereby avoiding damage when the sheet dripper is attached due to the thin tube wall of the tube body. The outer tube wall of the processed ribbed water supply pipe is provided with two side-by-side arranged patch reinforcement ribs 1002, and the width of the patch reinforcement ribs is greater than the width of the outer ribs.

[0056] In another embodiment, in order to form ribs 1001 on the inner wall of the water supply pipe, the core mold 2 may be improved. Figure 7 and Figure 8 As shown, a plurality of second molding grooves 23 are provided on the outer peripheral surface of the mold core 2, and the plurality of second molding grooves 23 are distributed around the axis of the mold core 2; wherein the second molding grooves 23 are configured to form ribs on the inner tube wall of the tube body extruded by the extrusion die.

[0057] Specifically, the second molding groove 23 on the mold core 2 will form protruding ribs 1001 on the inner tube wall of the extruded water supply pipe during the extrusion process of the material through the extrusion channel, thereby achieving the formation of ribs 1001 on both the inner and outer tube walls of the water supply pipe.

[0058] In another embodiment of the present application, in order to form the ribs 1001 only on the inner tube wall of the water supply pipe 1000, for the extrusion die, only the second molding groove 23 is provided on the outer surface of the core 2, and the first molding groove 32 is no longer provided on the inner surface of the mouth die 3.

[0059] Furthermore, in order to improve the extrusion effect, the mold base 1 needs to be heated. For this purpose, an electric heating belt 13 can be provided on the mold base 1. The electric heating belt 13 is wrapped around the outside of the mold base 1. The electric heating belt 13 is powered and heated to meet the requirement of heating and keeping the mold base 1 warm during use.

[0060] In order to facilitate the installation of the electric heating belt 13, connecting rods 131 can be respectively provided at the two ends of the electric heating belt 13, and connecting holes are provided on the connecting rods 131. The connecting bolts 132 pass through the connecting holes of the two connecting rods 131 arranged relatively adjacent to each other and are threadedly connected with fastening nuts 133. In this way, by tightening the fastening nuts 133, the electric heating belt 13 can be wrapped around the outside of the mold base 1.

[0061] Based on the above-mentioned extrusion die, the present application also provides an extrusion system, which includes an extruder, the extruder has an extrusion head 200, and also includes the above-mentioned extrusion die, the die base of the extrusion die is connected to the extrusion head 200, and the extrusion head 200 is connected to the material flow of the extrusion module.

[0062] A feed interface is usually provided on the die base, and the extrusion head 200 can be directly connected to the feed interface, or the extrusion head 200 can be connected to the feed interface of the die base through components such as a transition connecting pipe.

[0063] In addition, the electric heating belt is provided with at least one avoidance hole, which is used for avoidance when other components need to be connected to the outer peripheral surface of the die base. For example, the extruder head 200 is connected to the feed interface through the avoidance hole at the corresponding position.

[0064] Embodiment 2, based on the above embodiment 1, optionally, in order to facilitate the installation of the die on the die base and to reduce the workload of on-site debugging when the operator replaces the mold core and die specifications at a later time, the following structural improvements are also made to the extrusion die.

[0065] like Figure 1-Figure 14 As shown, the mounting hole 111 forms a conical structure, the outer circumferential surface of the mold core 2 is provided with a conical surface 21 matching the mounting hole 111 , and the outer circumferential surface of the die 3 is provided with a cylindrical positioning surface 31 .

[0066] The extrusion die also includes an installation adjustment component 4, which includes a flange gland 41, a pressing sleeve 42, a pressing ring 43 and a plurality of adjustment bolts 44; a plurality of adjustment threaded through holes 411 are provided on the outer circumference of the flange gland 41, a positioning guide hole 421 is formed on the pressing sleeve 42, and a cylindrical positioning surface 4210 matching the cylindrical positioning surface 31 is formed on the inner surface of the positioning guide hole 421, the adjusting bolt 44 is threadedly connected in the adjusting threaded through hole, the pressing ring 43 is detachably installed on the end surface of the pressing sleeve 42, the flange gland 41 is sleeved on the outside of the pressing sleeve 42 and the pressing ring 43, and the adjusting bolt 44 abuts against the outer circumference of the pressing sleeve 42;

[0067] The conical surface 21 is in contact with the hole wall of the mounting hole 111 , the flange cover 41 is arranged on the die base 1 , the die 3 is inserted into the positioning guide hole 421 and clamped between the pressure ring 43 and the die base 1 .

[0068] Specifically, in order to meet the need for no self-centering adjustment when the core mold 2 is replaced later, a mounting hole 111 is formed at one end of the through-mounting channel 11, and the mounting hole 111 has a trumpet-shaped conical structure; correspondingly, the core mold 2 is improved by forming a conical surface 21 on its outer circumference that matches the mounting hole 111. In this way, the process of installing the core mold 2 into the mounting hole 111 relies on the mutual cooperation and guidance of the conical surface 21 and the mounting hole 111 to achieve self-centering, thereby achieving the colinearity of the axis of the core mold 2 and the axis of the mounting hole 111.

[0069] In order to facilitate the disassembly of the mold core 2, the extrusion mold further includes a disassembly push rod 6; the end of the disassembly push rod forms a supporting portion, and the supporting portion is a cone head structure or a hemispherical head structure.

[0070] With respect to the new structure of the extrusion die, the specific replacement method includes the following steps.

[0071] During the initial assembly of the mold core 2 and the die 3 onto the mold base 1, the mold core 2 is first inserted into the mounting hole 111 of the mold base 1, and automatic centering is achieved by cooperating between the conical surface 21 of the mold core 2 and the conical structure of the mounting hole 111; then, the die 3 is assembled onto the mold base 1 through the installation adjustment component 4, and the corresponding adjustment bolt 44 is rotated to adjust the posture of the pressing sleeve 42 so that the axis of the positioning guide hole 421 is colinear with the axis of the mounting hole 111.

[0072] During the process of replacing the core mold 2 and the die 3, the pressure cover is first removed, and then the disassembly push rod 6 is inserted into the through installation channel 11 and presses against the inner end of the core mold 2. By applying pressure to the disassembly push rod 6, the core mold 2 is disengaged from the installation hole 111 and the die 3 is pushed out from the pressing sleeve 42 together with the core mold 2; the new core mold 2 is inserted into the installation hole 111 of the mold base 1 to achieve automatic centering, and the new die 3 is installed in the positioning guide hole 421 to achieve automatic centering. Finally, the pressure cover is assembled to complete the replacement operation.

[0073] Specifically, for the mouth die 3, during the initial installation, the mouth die 3 is assembled to the die base 1 by installing the adjustment assembly 4 so that the mouth die 3 is in line with the core 2 and the axis. In this process, the posture of the mouth die 3 needs to be adjusted, and the adjustment is achieved by adjusting the pressing sleeve 42 by adjusting the bolt 44. Specifically, the pressing sleeve 42 and the mouth die 3 are automatically aligned by using the positioning guide hole 421 in the pressing sleeve 42 and the cylindrical positioning surface 31 on the outer surface of the mouth die 3. When the pressing sleeve 42 is assembled to the die base 1 for the first time, the adjusting bolts 44 at different positions are rotated to adjust the pressing sleeve 42 and then indirectly adjust the mouth die 3 to achieve the collinearity of the axis of the pressing sleeve 42 and the axis of the core 2, thereby making the axis of the mouth die 3 and the axis of the core 2 collinear.

[0074] When replacing the core mold 2 and the mouth mold 3 at a later stage, it is only necessary to remove the pressure ring 43 to release the restriction on the mouth mold 3, and then insert the disassembly push rod 6 from the end facing away from the mounting hole 111 into the through mounting channel 11, so that the disassembly push rod 6 rests on the core mold 2. The disassembly push rod 6 is knocked to make the core mold 2 disengage from the mounting hole 111 and at the same time disengage from the pressure sleeve 42 against the mouth mold 3.

[0075] When assembling the new core 2 and the die 3, the core 2 still relies on its own tapered surface 21 to guide and cooperate with the mounting hole 111 to assemble in place. After self-centering, the core 2 needs to be fastened and assembled into the mounting hole 111. For this purpose, a protruding clamping protrusion 22 can be formed on the surface of the tapered surface 21 away from the inner end surface of the core 2. After the core 2 is assembled in place, the clamping protrusion 22 will be clamped in the mounting hole 111. At this time, the tapered surface 21 forms a surface contact with the hole wall of the mounting hole 111, and the edge of the clamping protrusion 22 forms a line contact with the mounting hole 111. On the one hand, the surface contact between the tapered surface 21 and the mounting hole 111 ensures the automatic centering of the core 2, and on the other hand, the line contact between the clamping protrusion 22 and the mounting hole 111 ensures that the core 2 is clamped and fixed in the mounting hole 111 to ensure that the position remains unchanged during the extrusion process. Of course, in order to further improve the stability of the clamping, the surface of the clamping protrusion 22 and the mounting hole 111 are clamped together in an interference fit manner to ensure the reliability of the connection between the two.

[0076] As for the die 3, since the pressing sleeve 42 has not been removed from the die base 1, the positioning guide hole 421 formed by the pressing sleeve 42 always remains in a collinear state with the axis of the mounting hole 111. When a new die 3 is assembled, the die 3 relies on its own cylindrical positioning surface 31 to cooperate with the positioning guide hole 421 of the pressing sleeve 42. After the die 3 is assembled in place, the axis of the die 3 will automatically become collinear with the axis of the mounting hole 111, and there is no need to adjust it through the adjusting bolt 44.

[0077] In this way, after the initial installation, the axis of the material flow channel 12, the axis of the mounting hole 111, the axis of the core 2, the axis of the cylindrical positioning surface 31, and the axis of the cylindrical positioning surface 4210 are respectively collinear with the axis of the mounting hole 111. When the core 2 and the die 3 are replaced later, the mounting hole 111 and the positioning guide hole 421 of the pressing sleeve 42 can be automatically aligned, thereby achieving no adjustment during the later replacement.

[0078] Furthermore, a disassembly hole 112 is formed at the other end of the through-mounting passage 11 , and the opening size of the mounting hole 111 is larger than the opening size of the disassembly hole 112 ; the inner end surface of the mold core 2 is exposed in the disassembly hole 112 .

[0079] Specifically, in order to facilitate the disassembly of the mold core 2 and the die 3, a step surface is formed at the connection between the mounting hole 111 formed in the through-mounting channel 11 and the disassembly insertion hole 112, and the inner end surface of the mold core 2 is exposed in the disassembly insertion hole 112. In this way, when the disassembly push rod 6 is inserted into the through-mounting channel 11, the disassembly push rod 6 can be pressed against the end of the mold core 2 to facilitate disassembly.

[0080] Furthermore, the positioning guide hole 421 is a first stepped hole, a first step surface 4213 is formed in the first stepped hole, the first stepped hole has a first positioning hole section 4211 and a second positioning hole section 4212, the size of the first positioning hole section 4211 is larger than the size of the second positioning hole section 4212, and the cylindrical positioning surface 4210 is formed in the second positioning hole section 4212; the pressure ring 43 is detachably mounted on the first step surface 4213.

[0081] Specifically, in order to facilitate the installation and fixing of the pressing ring 43, the positioning guide hole 421 forms a first stepped hole, and the corresponding first stepped surface 4213 is used for the installation and fixing of the pressing ring 43. The pressing ring 43 can be fixed on the first stepped surface 4213 by screws or bolts. The die 3 cooperates with the cylindrical positioning surface 4210 formed in the second positioning hole section 4212.

[0082] Preferably, a chamfer structure 4214 is formed at the connection portion between the second positioning hole section 4212 and the first positioning hole section 4211. Specifically, during the process of inserting the die 3, the die 3 is first inserted into the first positioning hole section 4211 with a larger diameter, and then, guided by the chamfer structure 4214, the die 3 can smoothly enter the second positioning hole section 4212.

[0083] Furthermore, a second stepped hole is formed on the flange cover 41, a second step surface is formed in the second stepped hole, the second stepped hole has a first fixed hole section 412 and a second fixed hole section 413, the size of the first fixed hole section 412 is smaller than the size of the second fixed hole section 413; the pressing sleeve 42 is located in the second fixed hole section 413 and abuts against the second step surface.

[0084] Specifically, the pressing sleeve 42 is installed in the second fixing hole section 413 of the flange gland 41 and positioned by the second step surface. After the flange gland 41 is fixed to the die base 1 by the fixing bolts, the gland is clamped between the second step surface and the die base 1. A gap is formed between the outer circumference of the gland and the second fixing hole section 413, so that the posture of the gland can be adjusted by adjusting the bolts 44.

[0085] Furthermore, a third step surface 422 is formed on the outer circumferential surface of the pressing sleeve 42 , and the third step surface 422 is in close contact with the second step surface.

[0086] Specifically, the pressing sleeve 42 will be in contact with the second step surface of the flange cover 41 through the third step surface 422 to achieve positioning and assembly of the two.

[0087] Preferably, a first annular groove 423 is provided on the third step surface 422 , and a second annular groove 424 is provided on the inner end surface of the pressing sleeve 42 .

[0088] Specifically, in order to facilitate the operator to indirectly adjust the coaxiality of the die 3 through the pressing sleeve 42, a first annular groove 423 and a second annular groove 424 are respectively provided on both sides of the pressing sleeve 42. The annular grooves arranged on both sides can reduce the contact area between the pressing sleeve 42 and the flange cover 41 and the die base 1. Furthermore, when the pressing sleeve 42 is adjusted by the circumferential adjusting bolts 44 of the pressing sleeve 42, the friction force generated between the flange cover 41 of the pressing sleeve 42 and the die base 1 can be reduced, so that the operator can quickly adjust the position of the pressing sleeve 42.

[0089] Based on the above technical solution, optionally, the mold base 1 includes an outer shell 13, an inner core 14 and at least one sleeve 15, the outer shell 13 is sleeved on the outside of the inner core 14, the sleeve 15 is clamped between the outer shell 13 and the inner core 14, the sleeve 15 is spaced between the outer shell 13 and the inner core 14 to form a plurality of material flow channels 12, the side wall of the outer shell 13 is provided with a plurality of feed ports, the feed ports are connected to the corresponding material flow channels 12, and the through mounting channel 11 is formed in the inner core 14.

[0090] Specifically, the feed port is arranged on the outer wall of the shell 13 to meet the feeding requirements of different material flow channels 12 , and a through installation channel 11 is reserved for disassembling the mold core 2 .

[0091] Furthermore, in order to meet the need of adding color code lines to the surface of the extruded water supply pipe so as to achieve the goal of not having to add additional separate color code line marking equipment, the extrusion mold also includes a color code ring 5, the inner end face of the color code ring 5 is provided with a feed groove 51 and a discharge drainage groove 52, the feed groove 51 and the discharge drainage groove 52 are connected, and the discharge drainage groove 52 extends to the inner edge of the color code ring 5; the color code ring 5 is sleeved on the outside of the mold core 2 and abuts against the end face of the mold base 1, a feed cavity is formed between the feed groove 51 and the mold base 1, a discharge drainage channel is formed between the discharge drainage groove 52 and the mold base 1, and the discharge drainage channel is connected to the extrusion channel 20; an auxiliary feeding port 16 is provided on the mold base 1, and the auxiliary feeding port 16 is connected to the feed cavity.

[0092] Specifically, by adding a color code ring 5 between the pressing sleeve 42 and the die base 1, the feed groove 51 and the discharge drainage groove 52 provided on the color code ring 5 will cooperate with the end surface of the die base 1 to form a feed cavity and a discharge drainage channel, and the discharge drainage channel will be connected to the extrusion channel 20. In this way, when the extruded materials flowing out of multiple material flow channels 12 converge into the extrusion channel 20 for continued extrusion and transportation, the color-coded materials injected into the feed cavity by the auxiliary feed port 16 flow into the extrusion channel 20 through the discharge drainage channel and merge into the surface of the material output by the outermost material flow channel 12. In this way, the outer surface of the plastic tube extruded from the extruder head will form a corresponding color code line.

[0093] Wherein, a plurality of discharge drainage grooves 52 may be provided on the inner end surface of the color mark ring 5 as required, and a plurality of color mark lines may be formed on the outer surface of the plastic pipe.

[0094] In another embodiment of the present application, an extruder is provided, including an extruder body and a head arranged on the extruder body, wherein the head adopts the above-mentioned extrusion die.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model 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 utility model.

Claims

1. An extrusion die, characterized in that: include: A die base, wherein a mounting hole is provided on the die base, a material flow channel is formed in the die base, and the material flow channel is sleeved outside the mounting hole; Mold core; A die, wherein the inner surface of the die is provided with a plurality of first forming grooves, and the plurality of first forming grooves are distributed around the axis of the die; The mold core is inserted into the mounting hole, the die is sleeved on the mold core, an extrusion channel is formed between the die and the mold core, and the material flow channel is connected to the extrusion channel; In addition, the first molding groove is configured to form ribs on the outer tube wall of the tube body extruded by the extrusion die.

2. The extrusion die according to claim 1, characterized in that: A plurality of second molding grooves are arranged on the outer surface of the mold core, and the plurality of second molding grooves are distributed around the axis of the mold core; Wherein, the second molding groove is configured to form ribs on the inner tube wall of the tube body extruded by the extrusion die.

3. The extrusion die according to claim 1, characterized in that: The first forming groove has a straight portion and a curved portion; along the material output direction of the extrusion channel, the curved portion and the straight portion are arranged in sequence.

4. The extrusion die according to claim 1, characterized in that: The die is also provided with at least one pair of auxiliary molding grooves arranged side by side on the inner surface, and the width of the auxiliary molding grooves is greater than the width of the first molding grooves; each pair of the auxiliary molding grooves is configured to form two patch reinforcement ribs arranged side by side on the outer tube wall of the tube body extruded by the extrusion die.

5. An extrusion die, characterized in that: include: A die base, wherein a mounting hole is provided on the die base, a material flow channel is formed in the die base, and the material flow channel is sleeved outside the mounting hole; A mold core, wherein a plurality of third molding grooves are arranged on the outer surface of the mold core, and the plurality of third molding grooves are distributed around the axis of the mold core; Mouth mould; The mold core is inserted into the mounting hole, the die is sleeved on the mold core, an extrusion channel is formed between the die and the mold core, and the material flow channel is connected to the extrusion channel; In addition, the third molding groove is configured to form ribs on the inner tube wall of the tube body extruded by the extrusion die.

6. The extrusion die according to any one of claims 1 to 5, characterized in that: A through installation channel is formed in the die base, one end of the through installation channel is used to form the installation hole, the installation hole forms a conical structure, the outer circumferential surface of the die core is provided with a conical surface matching the installation hole, and the outer circumferential surface of the die is provided with a cylindrical positioning surface; The extrusion die also includes an installation and adjustment component, which includes a flange gland, a pressing sleeve, a pressing ring and a plurality of adjustment bolts; a plurality of adjustment threaded through holes are arranged on the outer circumference of the flange gland, a positioning guide hole is formed on the pressing sleeve, and the inner surface of the positioning guide hole forms a cylindrical positioning surface matching the cylindrical positioning surface, the adjustment bolts are threadedly connected in the adjustment threaded through holes, the pressing ring is detachably mounted on the end surface of the pressing sleeve, the flange gland is sleeved on the outside of the pressing sleeve and the pressing ring, and the adjustment bolts abut against the outer circumference of the pressing sleeve; The conical surface is pressed against the hole wall of the mounting hole, the flange cover is arranged on the die base, the mouth die is inserted into the positioning guide hole and clamped between the pressure ring and the die base.

7. A ribbed water supply pipe, characterized in that: The ribbed water supply pipe is processed by the extrusion die as described in any one of claims 1 to 4, and the outer pipe wall of the ribbed water supply pipe is provided with outer ribs protruding toward the outside.

8. The ribbed water supply pipe according to claim 7, characterized in that: The inner pipe wall of the ribbed water supply pipe is provided with inner ribs protruding inwards.

9. The ribbed water supply pipe according to claim 7, characterized in that: Two patch reinforcement ribs arranged side by side are arranged on the outer pipe wall of the ribbed water supply pipe, and the width of the patch reinforcement ribs is greater than the width of the outer ribs.

10. A ribbed water supply pipe, characterized in that: The ribbed water supply pipe is processed by the extrusion die as claimed in claim 5, and the inner pipe wall of the ribbed water supply pipe is provided with inner ribs protruding inward.

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