Sizing and cooling device for automobile nylon pipe and extruder

Abstract

The utility model provides a sizing cooling device for an automobile nylon pipe and an extruder. The sizing cooling device comprises a vacuum water tank, a water ring sleeve and a sizing sleeve, a mounting sleeve is connected to one side wall of the vacuum water tank; the water ring sleeve is connected to the outer side of the mounting sleeve, and a feeding cone is arranged in the water ring sleeve; the sizing sleeve is connected between the water ring sleeve and the mounting sleeve and used for allowing pipe materials to penetrate through, a flaring part horizontally corresponding to the feeding cone is arranged at the outer end of the sizing sleeve, a first water passing ring cavity is formed among the outer end face of the sizing sleeve, the inner circumferential wall of the water ring sleeve and the outer circumferential wall of the feeding cone, and a water passing gap is formed between the sizing sleeve and the feeding cone; and a first water inlet is formed in the water ring sleeve. According to the sizing cooling device for the automobile nylon pipe, the flow resistance of pipe materials is reduced through the arrangement of the flaring part, and the sizing sleeve is prevented from being blocked; and moreover, the initial cooling time is favorably prolonged, the bending deformation of the melt pipe material caused by self weight is reduced, and the product quality of the nylon pipe is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile nylon tube processing, and specifically relates to a sizing and cooling device and an extruder for automobile nylon tubes. Background Art

[0002] Extrusion equipment is required when producing automotive nylon tubes. The ingredients are plasticized at high temperature and then extruded from the extrusion die. At this time, the tube is still at a very high temperature and does not have sufficient strength and rigidity to withstand its own weight and deformation. In order to obtain fine surface roughness, accurate size and geometric shape of the nylon tube, the nylon tube must be sized and cooled immediately when it leaves the die. This process is completed by the sizing and cooling device. After the sizing and cooling device, the nylon tube has been initially formed, and then enters the water tank to continue cooling until it is completely shaped.

[0003] In the prior art, nylon tubes produced by extruders are prone to wavy vertical lines on their surfaces, and the continuous processing time of the extruders is short, requiring frequent shutdowns to clean the sizing sleeves. This is particularly true when processing TPEE materials, which not only reduces production efficiency but also fails to guarantee the product quality of nylon tubes. Utility Model Content

[0004] The embodiment of the utility model provides a sizing and cooling device for automobile nylon tubes, which can prolong the continuous processing time of an extruder and help reduce the bending deformation of the molten tube material due to its own weight, thereby effectively improving the product quality of the nylon tube.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: in the first aspect, a sizing and cooling device for automobile nylon tube is provided, comprising: a vacuum water tank, a water ring sleeve and a sizing sleeve, a mounting sleeve whose main shaft extends in the horizontal direction is connected to one side wall of the vacuum water tank; the water ring sleeve is coaxially connected to the outer side of the mounting sleeve, a feed cone is arranged in the water ring sleeve, and the inner end diameter of the feed cone gradually decreases; the sizing sleeve is connected between the water ring sleeve and the mounting sleeve and extends horizontally into the vacuum water tank, the sizing sleeve is used for pipe material to pass through, an expanding portion corresponding to the horizontal level of the feed cone is arranged at the outer end of the sizing sleeve, a first water ring cavity is formed between the outer end surface of the sizing sleeve and the inner peripheral wall of the water ring sleeve and the outer peripheral wall of the feed cone, and a water gap for cooling water to pass through is provided between the sizing sleeve and the feed cone, and a first water inlet connected to the first water ring cavity is provided on the water ring sleeve.

[0006] As another embodiment of the utility model, a positioning boss protruding toward the outer circumference is provided on the outer circumferential wall of the sizing sleeve, and the water ring sleeve is connected to the installation sleeve through a connecting piece so that the positioning boss is pressed between the installation sleeve and the water ring sleeve.

[0007] As another embodiment of the utility model, the mounting sleeve includes a flange and a retaining ring. The flange is connected to the side wall of the vacuum water tank. A second water ring cavity is provided on the outer end surface of the flange. The retaining ring is connected to the outer side of the flange and is used to seal the second water ring cavity. A second water inlet connected to the second water ring cavity is provided on the flange.

[0008] As another embodiment of the utility model, a plurality of circles of water holes are penetrated through the outer peripheral wall of the sizing sleeve, and the plurality of circles of water holes are arranged at intervals along the axial direction of the sizing sleeve. Each circle of water holes includes a plurality of water holes arranged at intervals along the circumference of the sizing sleeve, and the water holes of two adjacent circles are staggered with each other along the circumference of the sizing sleeve.

[0009] As another embodiment of the utility model, the water through hole includes a first water through hole located outside the vacuum water tank and a second water through hole located inside the vacuum water tank, and the first water through hole and the second water through hole are both provided with a plurality of circles.

[0010] As another embodiment of the present invention, the distance between two adjacent circles of first water holes is twice the distance between two adjacent circles of second water holes, and the number of second water holes in each circle is twice the number of first water holes in each circle.

[0011] As another embodiment of the utility model, a plurality of connecting holes connected to the second water ring cavity are provided on the inner wall of the installation sleeve, and the connecting holes are gradually inclined toward the outer end of the installation sleeve from the outer periphery of the installation sleeve to the axis of the installation sleeve.

[0012] As another embodiment of the utility model, a reinforcing ring plate is provided at the inner end of the sizing sleeve, and the plate surface of the reinforcing ring plate is arranged perpendicular to the main axis of the sizing sleeve.

[0013] As another embodiment of the present invention, the cone angle of the flared portion is 28°.

[0014] The utility model provides a sizing cooling device for automobile nylon tubes with beneficial effects in that: compared with the prior art, the utility model provides a sizing cooling device for automobile nylon tubes, wherein cooling water is introduced into the first water ring cavity through the first water inlet, and the cooling water forms a cooling water film at the water gap, and the tube material entering through the feed cone passes through the cooling water film for preliminary cooling, and then passes through the flared portion on the sizing sleeve to enter the inner cavity of the sizing sleeve for shaping. The setting of the flared portion not only makes the tube material channel between the feed cone and the sizing sleeve transition smoothly, reduces the flow resistance of the tube material, avoids the blockage of the sizing sleeve, and thus prolongs the continuous processing time of the extruder; it also helps to prolong the initial cooling time of the tube material, achieves the effect of cooling and shaping while gathering and gathering, thereby reducing the bending deformation of the melt tube material due to its own weight, and effectively improves the product quality of the nylon tube.

[0015] In a second aspect, an embodiment of the utility model further provides an extruder.

[0016] The beneficial effects of the extruder provided in this embodiment are the same as the beneficial effects of the aforementioned sizing and cooling device for automobile nylon tubes, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of a sizing and cooling device for automotive nylon tubes provided in an embodiment of the utility model Figure 1 ;

[0019] Figure 2 A schematic cross-sectional view of a sizing and cooling device for a nylon tube for automobiles provided in an embodiment of the utility model;

[0020] Figure 3 A schematic structural diagram of a sizing sleeve provided in an embodiment of the utility model.

[0021] Among them, the reference numerals in the figure are:

[0022] 1. Vacuum water tank; 2. Installation sleeve; 21. Installation cavity; 22. Flange; 221. Connecting hole; 23. Retaining ring; 24. Second water ring cavity; 25. Second water inlet; 3. Water ring sleeve; 31. Feed cone; 32. First water inlet; 4. Sizing sleeve; 41. Expanding part; 42. Positioning boss; 43. First water hole; 44. Second water hole; 45. Reinforcement ring plate; 5. First water ring cavity; 6. Water gap. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on another element or indirectly on another element. It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "back", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meanings of "multiple" and "several" are two or more, unless otherwise clearly and specifically defined.

[0025] Please also read Figures 1 to 3 Now, a sizing and cooling device for automobile nylon tube provided by the utility model is described. The sizing and cooling device for automobile nylon tube comprises a vacuum water tank 1, a water ring sleeve 3 and a sizing sleeve 4; a mounting sleeve 2 whose main axis extends in the horizontal direction is connected to one side wall of the vacuum water tank 1; the water ring sleeve 3 is coaxially connected to the outer side of the mounting sleeve 2, and a feed cone 31 is arranged in the water ring sleeve 3, and the inner end diameter of the feed cone 31 gradually decreases; the sizing sleeve 4 is connected between the water ring sleeve 3 and the mounting sleeve 2, and extends horizontally into the vacuum water tank 1, and the sizing sleeve 4 is used for pipe material to pass through, and an expansion portion 41 corresponding to the level of the feed cone 31 is arranged at the outer end of the sizing sleeve 4, and a first water ring cavity 5 is formed between the outer end surface of the sizing sleeve 4 and the inner peripheral wall of the water ring sleeve 3 and the outer peripheral wall of the feed cone 31, and a water gap 6 for cooling water to pass through is provided between the sizing sleeve 4 and the feed cone 31, and a first water inlet 32 ​​connected to the first water ring cavity 5 is provided on the water ring sleeve 3.

[0026] The sizing and cooling device for automobile nylon tube provided in this embodiment, compared with the prior art, introduces cooling water into the first water ring cavity 5 through the first water inlet 32, and the cooling water forms a cooling water film at the water gap 6. The tube material entering through the feed cone 31 passes through the cooling water film for preliminary cooling, and then enters the inner cavity of the sizing sleeve 4 through the flared portion 41 on the sizing sleeve 4 for shaping. The setting of the flared portion 41 not only makes the tube material channel between the feed cone 31 and the sizing sleeve 4 transition smoothly, reduces the flow resistance of the tube material, avoids the blockage of the sizing sleeve 4, and thus prolongs the continuous processing time of the extruder; but also helps to prolong the initial cooling time of the tube material, achieves the effect of cooling and shaping while gathering and gathering, thereby reducing the bending deformation of the melt tube material due to its own weight, and effectively improves the product quality of the nylon tube.

[0027] It should be noted that the cooling water entering the first water ring cavity 5 from the first water inlet 32 ​​will continue to form a cooling water film in the water gap 6, and the excess cooling water will flow out from the gap between the water ring 3 and the sizing sleeve 4 or the outer opening of the feed cone 31 to the cooling water circulation system. The pipe material extruded by the extrusion die enters the feed cone 31, and then enters the inner cavity of the sizing sleeve 4 after passing through the cooling water film. Therefore, a small amount of cooling water will enter the sizing sleeve 4 together with the pipe material, which has the effect of lubricating the pipe material. The vacuum water tank 1 is connected to a vacuum pumping device to keep the vacuum water tank 1 in a negative pressure state, and the pressure in the pipe material extruded by the extrusion die is equal to the atmospheric pressure. Therefore, when the pipe material enters the vacuum water tank 1, the pressure inside the pipe material is greater than the pressure outside the pipe material, so that the outer wall of the pipe material is adsorbed on the inner wall of the sizing sleeve 4 to achieve sizing.

[0028] In this embodiment, the outer diameter of the flared portion 41 matches the diameter of the small diameter end of the feed cone 31, so as to smoothly introduce the pipe material into the sizing sleeve 4 and reduce the flow resistance of the pipe material. The sizing sleeve 4 is made of copper material with good thermal conductivity, which can ensure the stability of the cooling and sizing process of the nylon tube.

[0029] The sizing and cooling device for automobile nylon tubes provided in this embodiment makes the continuous processing of nylon tubes more stable, and the continuous processing time of 6 to 12 hours, which requires shutdown for cleaning, is increased to 60 hours, and the production speed is also increased from the original 20 to 25 m / min to 40 to 45 m / min; and the outer diameter accuracy and dimensional stability of the extruded automobile nylon tubes are effectively improved, which has broad market application prospects.

[0030] As a specific implementation of the sizing and cooling device for automobile nylon tubes provided by the utility model, see Figure 2 A positioning boss 42 protruding toward the outer periphery is provided on the outer peripheral wall of the sizing sleeve 4, and the water ring sleeve 3 is connected to the mounting sleeve 2 through a connecting piece so that the positioning boss 42 is crimped between the mounting sleeve 2 and the water ring sleeve 3.

[0031] In this embodiment, the outer end surface of the installation sleeve 2 and the inner end surface of the water ring sleeve 3 are respectively provided with grooves adapted to the positioning boss 42. When installing the sizing sleeve 4, the sizing sleeve 4 is first inserted into the installation sleeve 2, and the positioning boss 42 is installed in the groove of the installation sleeve 2, and then the groove of the water ring sleeve 3 is aligned with the positioning boss 42, and finally the water ring sleeve 3 is connected to the installation sleeve 2 by bolts and other connecting parts to press the sizing sleeve 4 between the installation sleeve 2 and the water ring sleeve 3. The above structure simplifies the installation operation of the sizing sleeve 4, and through the cooperation of the positioning boss 42 and the groove, the coaxiality between the sizing sleeve 4 and the water ring sleeve 3 can be ensured, which helps to improve the dimensional accuracy of the nylon tube.

[0032] As a specific implementation of the sizing and cooling device for automobile nylon tubes provided by the utility model, see Figure 2 The mounting sleeve 2 includes a flange 22 and a retaining ring 23. The flange 22 is connected to the side wall of the vacuum water tank 1. A second water ring cavity 24 is provided on the outer end surface of the flange 22. The retaining ring 23 is connected to the outer side of the flange 22 and is used to seal the second water ring cavity 24. A second water inlet 25 connected to the second water ring cavity 24 is provided on the flange 22.

[0033] In this embodiment, the retaining ring 23 and the flange 22 are connected to the side wall of the vacuum water tank 1 by bolts, and the retaining ring 23 closes the second water ring cavity 24. Cooling water is introduced into the second water ring cavity 24 through the second water inlet 25, and then the cooling water enters the interior of the mounting sleeve 2 to cool the sizing sleeve 4, and then the pipe material in the inner cavity of the sizing sleeve 4 is cooled and shaped for the second time. Further, in order to increase the sealing performance of the second water ring cavity 24, a rubber sealing plate is provided between the flange 22 and the retaining ring 23.

[0034] As a specific implementation of the sizing and cooling device for automobile nylon tubes provided by the utility model, see Figure 2 and Figure 3 A plurality of circles of water holes are penetrated on the outer peripheral wall of the sizing sleeve 4, and the plurality of circles of water holes are arranged at intervals along the axial direction of the sizing sleeve 4. Each circle of water holes includes a plurality of water holes arranged at intervals along the circumferential direction of the sizing sleeve 4, and the water holes of two adjacent circles are staggered with each other along the circumferential direction of the sizing sleeve 4.

[0035] In this embodiment, the arrangement of the water holes can introduce cooling water on the periphery of the sizing sleeve 4 into the inner cavity, and form a floating water film between the inner cavity wall of the sizing sleeve 4 and the pipe material, which plays a role in lubricating the outer surface of the nylon tube that is close to being formed, preventing the pipe material from adhering to the inner wall of the sizing sleeve 4, making the formed surface of the nylon tube smoother, and ensuring the surface roughness of the nylon tube. Specifically, the staggered arrangement of the water holes on two adjacent circles allows the cooling water to enter the inner cavity of the sizing sleeve 4 from all angles, thereby making the formed floating water film more uniform, which helps to improve the forming quality of the nylon tube.

[0036] As a specific implementation of the sizing and cooling device for automobile nylon tubes provided by the utility model, see Figure 2 The water holes include a first water hole 43 located outside the vacuum water tank 1 and a second water hole 44 located inside the vacuum water tank 1. The first water hole 43 and the second water hole 44 are both provided with a plurality of circles.

[0037] In this embodiment, the first water hole 43 guides the cooling water in the second water ring cavity 24 into the inner cavity of the sizing sleeve 4, forming a uniform water film on the outer surface of the pipe material, playing a role in cooling and lubricating. The second water hole 44 is located in the vacuum water tank 1. In addition to guiding the cooling water in the vacuum water tank 1 into the inner cavity of the sizing sleeve 4 to form a lubricating water film, it is also beneficial to make the negative pressure in the vacuum water tank 1 act on the inner cavity of the sizing sleeve 4, so that the pipe material fits on the inner wall of the sizing sleeve 4, thereby ensuring the outer diameter of the nylon tube.

[0038] As a specific implementation of the sizing and cooling device for automobile nylon tubes provided by the utility model, see Figure 2 and Figure 3 The distance between two adjacent circles of first water holes 43 is twice the distance between two adjacent circles of second water holes 44 , and the number of second water holes 44 in each circle is twice the number of first water holes 43 in each circle.

[0039] In this embodiment, the above arrangement makes the first water holes 43 more sparsely arranged than the second water holes 44, so that the cooling speed of the tube material in the inner cavity of the sizing sleeve 4 has a transition process, thereby avoiding the appearance of corrugations on the surface of the nylon tube or uneven outer diameter of the nylon tube due to rapid cooling of the molten tube material.

[0040] Specifically, the diameter of the water holes, the spacing and number of the first water holes 43, and the spacing and number of the second water holes 44 are all determined according to the actual size of the sizing sleeve 4. For example, the diameter of the water holes is 1 mm, the spacing between two adjacent circles of the first water holes 43 is set to 5 mm, and the number of the first water holes 43 in each circle is set to 5; the spacing between two adjacent circles of the second water holes 44 is set to 2.5 mm, and the number of the second water holes 44 in each circle is set to 10.

[0041] As a specific implementation of the sizing and cooling device for automobile nylon tubes provided by the utility model, see Figure 2 A plurality of connecting holes 221 communicating with the second water ring cavity 24 are provided on the inner peripheral wall of the installation sleeve 2. From the outer periphery of the installation sleeve 2 to the axis of the installation sleeve 2, the connecting holes 221 are gradually inclined toward the outer end of the installation sleeve 2.

[0042] In this embodiment, the connecting hole 221 is inclined so that the cooling water in the second water ring cavity 24 enters the installation cavity 21 toward the expansion portion 41. On the one hand, the flow directions of the cooling water and the pipe material are set in opposite directions, which helps to improve the cooling effect. On the other hand, it prevents the cooling water from directly impacting the pipe material in the inner cavity of the sizing sleeve 4 through the first water hole 43, thereby affecting the surface accuracy of the nylon tube.

[0043] As a specific implementation of the sizing and cooling device for automobile nylon tubes provided by the utility model, see Figure 2 and Figure 3 A reinforcing ring plate 45 is provided at the inner end of the sizing sleeve 4 , and the plate surface of the reinforcing ring plate 45 is arranged perpendicular to the main axis of the sizing sleeve 4 .

[0044] In this embodiment, since the inner end of the sizing sleeve 4 is suspended in the vacuum water tank 1, the inner end of the sizing sleeve 4 may vibrate during the process of the traction machine pulling the pipe material. In this embodiment, a reinforcing ring plate 45 is provided at the inner end of the sizing sleeve 4 to increase the weight of the sizing sleeve 4, which helps to improve the stability of the inner end of the sizing sleeve 4, thereby reducing the occurrence of the above-mentioned vibration, and indirectly ensuring the shaping quality of the nylon tube.

[0045] As a specific implementation of the sizing and cooling device for automobile nylon tubes provided by the utility model, see Figure 2 The cone angle of the expanded portion 41 is 28°.

[0046] In this embodiment, the flared portion 41 is the main structural feature for improving the dimensional accuracy and stability of the nylon tube, and the taper angle of the flared portion 41 is a key factor. If the angle is too large or too small, the flow state of the tube material cannot be improved well. In this embodiment, the angle is set to 28° (i.e., 14° on one side), and good effect feedback is obtained in the actual processing process.

[0047] Furthermore, based on the 28° cone angle, combined with the actual shaped outer diameter of the nylon tube (the inner diameter of the sizing sleeve 4 that matches it), the length of the flared portion 41 can be calculated. The length setting of the flared portion 41 can effectively ensure the initial cooling time of the tube material, thereby ensuring the quality of the nylon tube product.

[0048] Based on the same inventive concept, the present application also provides an extruder, comprising any of the above

[0049] A sizing and cooling device for automobile nylon tubes is proposed.

[0050] The beneficial effects of the extruder provided in this embodiment are the same as the beneficial effects of the aforementioned sizing and cooling device for automobile nylon tubes, and will not be described in detail here.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sizing and cooling device for automobile nylon tubes, characterized in that: include: A vacuum water tank, wherein a mounting sleeve with a main shaft extending in a horizontal direction is connected to one side wall of the vacuum water tank; A water ring sleeve is coaxially connected to the outer side of the mounting sleeve, a feed cone is arranged in the water ring sleeve, and the inner end diameter of the feed cone gradually decreases; and A sizing sleeve is connected between the water ring sleeve and the mounting sleeve and extends horizontally into the vacuum water tank. The sizing sleeve is used for pipe material to pass through. The outer end of the sizing sleeve is provided with a flared portion horizontally corresponding to the feed cone. A first water-passing ring cavity is formed between the outer end surface of the sizing sleeve and the inner circumferential wall of the water ring sleeve and the outer circumferential wall of the feed cone. A water-passing gap for cooling water to pass through is provided between the sizing sleeve and the feed cone. A first water inlet connected to the first water-passing ring cavity is provided on the water ring sleeve.

2. The sizing and cooling device for automobile nylon tube according to claim 1, characterized in that: A positioning boss protruding toward the outer circumference is provided on the outer peripheral wall of the sizing sleeve, and the water ring sleeve is connected to the mounting sleeve through a connecting piece so that the positioning boss is pressed between the mounting sleeve and the water ring sleeve.

3. The sizing and cooling device for automobile nylon tube according to claim 2, characterized in that: The mounting sleeve includes a flange and a retaining ring. The flange is connected to the side wall of the vacuum water tank. A second water ring cavity is provided on the outer end surface of the flange. The retaining ring is connected to the outer side of the flange and is used to seal the second water ring cavity. A second water inlet connected to the second water ring cavity is provided on the flange.

4. The sizing and cooling device for automobile nylon tubes according to claim 3, characterized in that: A plurality of circles of water holes are formed through the outer peripheral wall of the sizing sleeve, and the plurality of circles of water holes are arranged at intervals along the axial direction of the sizing sleeve. Each circle of water holes includes a plurality of water holes arranged at intervals along the circumference of the sizing sleeve, and the water holes of two adjacent circles are staggered with each other along the circumference of the sizing sleeve.

5. The sizing and cooling device for automobile nylon tubes according to claim 4, characterized in that: The water through hole comprises a first water through hole located outside the vacuum water tank and a second water through hole located inside the vacuum water tank, and the first water through hole and the second water through hole are both provided with a plurality of circles.

6. The sizing and cooling device for automobile nylon tubes according to claim 5, characterized in that: The distance between two adjacent circles of the first water passing holes is twice the distance between two adjacent circles of the second water passing holes, and the number of the second water passing holes in each circle is twice the number of the first water passing holes in each circle.

7. The sizing and cooling device for automobile nylon tubes according to claim 3, characterized in that: The inner wall of the installation sleeve is provided with a plurality of communication holes communicating with the second water-passing ring cavity. From the outer periphery of the installation sleeve to the axis of the installation sleeve, the communication holes are gradually inclined toward the outer end of the installation sleeve.

8. The sizing and cooling device for automobile nylon tubes according to claim 1, characterized in that: A reinforcing ring plate is provided at the inner end of the sizing sleeve, and a plate surface of the reinforcing ring plate is arranged perpendicular to the main axis of the sizing sleeve.

9. The sizing and cooling device for automobile nylon tubes according to claim 1, characterized in that: The cone angle of the flared portion is 28°.

10. An extruder, characterized in that The invention comprises a sizing and cooling device for automobile nylon tube as described in any one of claims 1 to 9.

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