Elastic floating adjustable sizing sleeve

Abstract

An elastic floating adjustable sizing sleeve, comprising: a sizing sleeve body (100), an outlet end of which is configured as a deformation part (110), and an outer circumference of the deformation part (110) being configured as a conical surface; an adjustment mechanism, comprising a transmission assembly (200), a pull rod (210) and a pressure ring (220), the pressure ring (220) being mounted on the pull rod (210), abutting against the deformation part (110) by means of the conical surface, and driving the pull rod (210) to move forward and backward by means of the transmission assembly (200); and a spring (211), which is sleeved on the pull rod (210), a spring force provided by the spring (211) eliminating a gap in the transmission assembly (200), thereby achieving the purpose of elastic floating adjustment, and thus improving the adjustment accuracy of the entire sizing sleeve.

Description

An elastic floating adjustable sizing sleeve Technical Field

[0001] The invention belongs to the technical field of plastic pipe molding, and particularly relates to an elastic floating adjustable sizing sleeve. Background Art

[0002] During the extrusion process of plastic pipes, the billet needs to be cooled and formed after extrusion. The current cooling and forming method mainly involves pulling the extruded billet through a sizing sleeve, where it is cooled, shrunk, and formed under a vacuum environment. However, due to the different shrinkage rates of extruded pipes of the same specification but different pressure levels, a corresponding sizing sleeve must be used for each pressure level. This results in an extremely large number of sizing sleeves, which are complex and expensive to manage. Furthermore, frequent replacement of sizing sleeves during production is labor-intensive and costly.

[0003] To solve the above problems, an adjustable sizing sleeve is currently available. Although it can adjust the diameter of the pipe, the current adjustable sizing sleeve often needs to be driven by a sprocket or chain. This transmission method has high requirements for parts processing and assembly, and there is a gap between the sprocket and the chain, and the gap is difficult to eliminate, resulting in low adjustment accuracy.

[0004] For example, in the prior art, there is an invention patent with application number CN202220772200.9, which discloses a variable diameter sizing sleeve, including a die, an adjusting member and a driving mechanism. The die has a pipe inlet end and a pipe outlet end, the adjusting member is movably arranged on the pipe outlet end, the output end of the driving mechanism is connected to the adjusting member, and the driving mechanism drives the adjusting member to move along the axial direction of the die, and the adjusting member changes the inner diameter of the pipe outlet end. The variable diameter sizing sleeve drives the adjusting member through the driving mechanism, so that the adjusting member moves along the axial direction of the die, and the adjusting member is used to change the inner diameter of the pipe outlet end, thereby limiting the formed pipe diameter of the extruded pipe. It is suitable for extruded pipes with large differences in formed pipe diameters, reduces the number of sizing sleeves, reduces management difficulty and operation difficulty, and is beneficial to actual production.

[0005] The above-mentioned comparative documents use a transmission structure of sprockets and chains, which has problems such as poor transmission synchronization and high requirements for parts processing and assembly. Technical issues

[0006] The present invention aims to solve the above problems in the prior art and proposes an elastic floating adjustable sizing sleeve which is easy to assemble, has high adjustment accuracy and more stable transmission. Technical Solutions

[0007] The present invention can be achieved through the following technical solutions:

[0008] An elastic floating adjustable sizing sleeve, comprising:

[0009] The sizing sleeve body has an outlet end configured as a deformation portion, and an outer circumference of the deformation portion is configured as a conical surface;

[0010] The adjusting mechanism includes a transmission assembly, a pull rod, and a pressure ring. The pressure ring is mounted on the pull rod and abuts against the deformable portion through a conical surface. The pull rod is driven forward and backward by the transmission assembly, and the pressure ring moves along the conical surface of the deformable portion and squeezes and deforms the deformable portion to adjust the diameter of the pipe.

[0011] A spring is sleeved on the pull rod, and the spring force provided by the spring eliminates the clearance of the transmission component to improve the adjustment accuracy.

[0012] As a further improvement of the present invention, a mounting plate is provided on the outer circumference of the inlet end of the sizing sleeve body, and the transmission assembly is provided on the mounting plate.

[0013] As a further improvement of the present invention, one end of the pull rod is connected to the pressure ring, and the other end passes through the mounting plate and is connected to the transmission assembly, while the two ends of the spring are respectively in contact with the mounting plate and the pressure ring.

[0014] As a further improvement of the present invention, the transmission assembly includes:

[0015] An adjusting screw ring, wherein the pull rod is connected to the bottom surface of the adjusting screw ring, and the threaded head at the end of the pull rod is threadedly connected to the adjusting screw ring;

[0016] A rotating nut is rotatably arranged on the mounting plate and is connected to the adjusting screw ring through a thread.

[0017] As a further improvement of the present invention, the elastic force provided by the spring is transmitted to the rotating nut through the pull rod and the adjusting screw in sequence, eliminating the gap between the adjusting screw and the rotating nut, and at the same time pulling the rotating nut and making it stick to the mounting plate.

[0018] As a further improvement of the present invention, a handle is installed on the rotating nut, and the rotating nut is driven to rotate by the handle. The adjusting screw ring moves axially along the thread of the rotating nut and drives the pull rod to move. At this time, the pressure ring causes the deformation part to deform toward or away from the axis.

[0019] As a further improvement of the present invention, the transmission assembly further comprises a limit block, which is arranged on the end surface of the adjusting screw ring away from the mounting plate, and one end of the limit block extends outwardly to the top surface of the rotating nut.

[0020] As a further improvement of the present invention, it also includes a water cooling component, which has:

[0021] a water jacket, which is arranged on the mounting plate;

[0022] A water nozzle is connected to the water jacket and is used to transport cooling water. The cooling water is transported into the water jacket through the water nozzle and then flows into the sizing sleeve body for cooling.

[0023] As a further improvement of the present invention, a coarse adjustment scale is engraved on the outer wall surface of the water jacket, and when the rotating nut rotates one circle, the adjusting screw ring moves a preset number of grids along the coarse adjustment scale.

[0024] As a further improvement of the present invention, the surface of the mounting plate is engraved with annularly distributed fine-tuning scales, and the rotating nut accurately controls the axial movement of the pressure ring through the fine-tuning scales during the rotation process. Beneficial effects

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. Turn the rotating nut through the handle to drive the adjusting screw ring, pull rod and pressure ring to move axially in sequence. At this time, the pressure ring moves along the conical surface of the deformation part and deforms the deformation part toward or away from the axis to adjust the pipe diameter. Only one sizing sleeve is needed to meet the outer diameter requirements of pipes of different pressure levels.

[0027] 2. A spring is provided on the pull rod. The elastic force provided by the spring is transmitted to the rotating nut through the pull rod and the adjusting screw ring in sequence. As a result, the threads between the adjusting screw ring and the rotating nut are always in a state of single-sided tight contact, thereby eliminating the gap between the adjusting screw ring and the rotating nut, ensuring more stable transmission and higher adjustment accuracy.

[0028] 3. The elastic force provided by the spring always pulls the adjusting screw ring through the pull rod, and the adjusting screw ring pulls the rotating nut so that it is always attached to the mounting plate, further ensuring the stability and reliability of the transmission;

[0029] 4. A limit block is provided on the adjusting screw ring, which extends outward to the top surface of the rotating nut. When the elastic force of the spring is insufficient to keep the rotating nut on the surface of the mounting plate, the adjusting screw ring will no longer move. Instead, the rotating nut will move upward along the thread of the adjusting screw ring. At this time, the limit block can limit the rotating nut and prevent the rotating nut from separating from the adjusting screw ring.

[0030] 5. The overall structure of the transmission mechanism is simple and easy to assemble. The transmission process is more stable and reliable, and the adjustment accuracy is improved.

[0031] 6. The outer surface of the water jacket is engraved with a coarse adjustment scale. When the rotating nut rotates, the adjusting screw moves axially along the outer wall of the water jacket. The operator can know the adjustment range according to the coarse adjustment scale at the position of the adjusting screw. Specifically, when the rotating nut rotates one circle, the rotating nut moves the preset number of grids along the coarse adjustment scale.

[0032] 7. The surface of the mounting plate is also engraved with an annular fine-tuning scale. The rotating nut moves along the fine-tuning scale during the rotation process, thereby reflecting the rotation angle of the rotating nut and the axial displacement of the pressure ring, and then reflecting the radial displacement of the deformation part. The coordination of the coarse adjustment scale and the fine adjustment scale greatly improves the adjustment accuracy of the entire sizing sleeve.

[0033] 8. On the one hand, the sizing sleeve of the present application eliminates the transmission gap through the setting of the elastic floating transmission mechanism, making the transmission more stable and improving the adjustment accuracy. On the other hand, it further achieves the purpose of fine adjustment through the coordination of the coarse adjustment scale and the fine adjustment scale. Compared with the adjustable sizing sleeve in the prior art, it is more practical and has more production value. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] FIG1 is a cross-sectional view of an elastic floating adjustable sizing sleeve of the present invention;

[0035] FIG2 is a partial enlarged view of point A in FIG1 of the present invention;

[0036] FIG3 is a schematic diagram of the location of the coarse adjustment scale of the present invention;

[0037] FIG4 is a schematic diagram of the position of the fine adjustment scale of the present invention.

[0038] In the figure, 100, sizing sleeve body; 110, deformation part; 120, mounting plate; 121, fine adjustment scale; 200, transmission assembly; 210, pull rod; 211, spring; 220, pressure ring; 230, adjusting screw ring; 240, rotating nut; 241, handle; 242, thrust ball bearing; 250, limit block; 300, water cooling assembly; 310, water jacket; 311, coarse adjustment scale; 320, water nozzle. Modes for Carrying Out the Invention

[0039] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical method of the present invention, but the present invention is not limited to these embodiments.

[0040] As shown in Figures 1-4, the present invention provides an elastic floating adjustable sizing sleeve, comprising:

[0041] The sizing sleeve body 100 has an outlet end provided with a deformable portion 110 , the outer circumference of the deformable portion 110 is provided with a conical surface, and at least three or more wave-shaped gaps are provided between each deformable portion;

[0042] The adjusting mechanism includes a transmission assembly 200, a pull rod 210, and a pressure ring 220. The pressure ring 220 is mounted on the pull rod 210 and abuts against the deforming portion 110 through a conical surface. The transmission assembly 200 drives the pull rod 210 to move back and forth. At this time, the pressure ring 220 moves along the conical surface of the deforming portion 110 and deforms the deforming portion 110 toward or away from the axis to adjust the diameter of the pipe. In this way, only one sizing sleeve is needed to meet the sizing requirements of pipes of the same specification but different pressure levels.

[0043] It is worth mentioning here that in this embodiment, a spring 211 is provided on the pull rod 210, and the spring 211 can provide a spring force to eliminate the gap existing in the transmission assembly 200, thereby achieving the purpose of elastic floating adjustment, thereby improving the adjustment accuracy of the entire sizing sleeve.

[0044] Preferably, a mounting plate 120 is provided on the outer circumference of the inlet end of the sizing sleeve body 100 , and the transmission assembly 200 is provided on the mounting plate 120 .

[0045] Preferably, one end of the pull rod 210 is connected to the pressure ring 220, and the other end passes through the mounting plate 120 and is connected to the transmission assembly 200. At the same time, the two ends of the spring 211 are respectively in contact with the mounting plate 120 and the pressure ring 220, wherein the spring 211 is always in a compressed state, and the spring 211 force provided by it can pull the transmission assembly 200 toward the direction of the mounting plate 120.

[0046] Preferably, the transmission assembly 200 includes:

[0047] The adjusting screw ring 230 and the pull rod 210 are connected to the bottom surface of the adjusting screw ring 230 , and the threaded head at the end of the pull rod 210 is threadedly connected to the adjusting screw ring 230 ;

[0048] The rotating nut 240 is rotatably arranged on the mounting plate 120, wherein the internal thread of the rotating nut 240 is cooperated with the external thread of the adjusting screw ring 230. As the rotating nut 240 rotates, the adjusting screw ring 230 can move axially along the thread of the rotating nut 240. At this time, the rotating nut 240 drives the pull rod 210 and the pressure ring 220 to move axially, so that the pressure ring 220 can move along the conical surface of the deformation part 110 and cause it to deform close to or away from the axial direction, thereby achieving the purpose of adjusting the diameter of the pipe.

[0049] Specifically, the elastic force provided by the spring 211 is transmitted to the rotating nut 240 through the pull rod 210 and the adjusting screw ring 230 in sequence, thereby making the threads between the adjusting screw ring 230 and the rotating nut 240 always in a state of unilateral tight contact, thereby eliminating the purpose of eliminating the gap between the adjusting screw ring 230 and the rotating nut 240, ensuring more stable transmission and higher adjustment accuracy, and also playing a role in preventing the mechanism from loosening, that is, preventing the adjusting screw ring 230 and the rotating nut 240 from loosening due to vibration during operation;

[0050] In addition, the elastic force provided by the spring 211 always pulls the adjusting screw ring 230 through the pull rod 210, thereby the adjusting screw ring 230 pulls the rotating nut 240 so that it is always attached to the mounting plate 120, further ensuring the stability and reliability of the transmission.

[0051] Preferably, a handle 241 is installed on the rotating nut 240, and the rotating nut 240 is driven to rotate by the handle 241. At this time, the adjusting screw ring 230 moves axially along the thread of the rotating nut 240 and drives the pull rod 210 and the pressure ring 220 to move synchronously.

[0052] Preferably, the transmission assembly 200 further includes a limit block 250, which is disposed on the end surface of the adjusting screw ring 230 away from the mounting plate 120. One end of the limit block 250 extends outward to the top surface of the rotating nut 240. Specifically, when the limit block 250 abuts against the rotating nut 240, the pressure ring 220 is located at the outermost end of the deformation portion 110. At this time, the diameter of the pipe is at its maximum. During the rotation of the handle 241, the limit block 250 moves axially synchronously with the adjusting screw ring 230 and leaves the upper end surface of the rotating nut 240.

[0053] The reason for setting the limit block 250 is to prevent the situation where the elastic force of the spring 211 is insufficient to keep the rotating nut 240 on the surface of the mounting plate 120. At this time, the adjusting screw ring 230 no longer moves, but the rotating nut 240 moves upward along the thread of the adjusting screw ring 230. The limit block 250 can limit the rotating nut 240 and prevent the rotating nut 240 from separating from the adjusting screw ring 230.

[0054] In addition, a thrust ball bearing 242 is installed on the end surface of the rotating nut 240 that contacts the mounting plate 120 , thereby reducing the friction force when the rotating nut 240 rotates, making the rotating nut 240 rotate more smoothly.

[0055] It should be noted here that the overall structure of the transmission mechanism in this embodiment is simple and easy to assemble, and there is no requirement for assembly accuracy during the assembly process, which greatly reduces the assembly time and improves efficiency. The transmission process is more stable and reliable, and the adjustment accuracy is also improved.

[0056] Preferably, it also includes a water cooling assembly 300, which has:

[0057] a water jacket 310 , which is disposed on the mounting plate 120 ;

[0058] The water nozzle 320 is connected to the water jacket 310 and is used to transport cooling water. The cooling water is transported into the water jacket 310 through the water nozzle 320 and then flows into the sizing sleeve body 100 for cooling.

[0059] Preferably, a coarse adjustment scale 311 is engraved on the outer wall surface of the water jacket 310. During the rotation of the rotating nut 240, the adjusting screw ring 230 moves axially along the outer wall of the water jacket 310. The operator can thus know the adjustment amplitude based on the coarse adjustment scale 311 at the position of the adjusting screw ring 230. For example, when the rotating nut 240 rotates one circle, the rotating nut 240 moves one grid along the coarse adjustment scale 311.

[0060] In addition, the surface of the mounting plate 120 is also engraved with an annularly distributed fine-tuning scale 121. The rotating nut 240 moves along the fine-tuning scale 121 during the rotation process, thereby reflecting the rotation angle of the rotating nut 240 and then reflecting the radial displacement of the deformation part 110. Through the coordination of the coarse-adjusting scale 311 and the fine-adjusting scale 121, the adjustment accuracy of the entire sizing sleeve is greatly improved.

[0061] That is to say, the sizing sleeve in this embodiment, on the one hand, eliminates the transmission gap through the setting of the elastic floating transmission mechanism, makes the transmission more stable, and improves the adjustment accuracy. On the other hand, it further achieves the purpose of fine adjustment through the cooperation of the coarse adjustment scale 311 and the fine adjustment scale 121. Compared with the adjustable sizing sleeve in the prior art, it has more practicality and production value.

[0062] The technical means disclosed in the solutions of the present invention are not limited to the technical means disclosed in the above technical means, but also include technical solutions composed of any combination of the above technical features. The above is a specific embodiment of the present invention. It should be noted that for those skilled in the art, without departing from the principles of the present invention, various improvements and modifications can be made, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

[0063] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0064] In addition, in the present invention, descriptions such as "first," "second," and "one" are for descriptive purposes only and should not be understood to indicate or imply their relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0065] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0066] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. An elastic floating adjustable sizing sleeve, characterized in that: include: The sizing sleeve body has an outlet end configured as a deformation portion, and an outer circumference of the deformation portion is configured as a conical surface; The adjusting mechanism comprises a transmission assembly, a pull rod and a pressure ring. The pressure ring is mounted on the pull rod and abuts against the deformable part through a conical surface. The pull rod is driven to move forward and backward by the transmission assembly. The pressure ring moves along the conical surface of the deformable part and squeezes and deforms the deformable part to adjust the diameter of the pipe. A spring is sleeved on the pull rod, and the spring force provided by the spring eliminates the clearance of the transmission component to improve the adjustment accuracy.

2. The elastic floating adjustable sizing sleeve according to claim 1, characterized in that: A mounting plate is arranged on the outer circumference of the inlet end of the sizing sleeve body, and the transmission assembly is arranged on the mounting plate.

3. The elastic floating adjustable sizing sleeve according to claim 2, characterized in that: One end of the pull rod is connected to the pressure ring, and the other end passes through the mounting plate and is connected to the transmission assembly, while the two ends of the spring are respectively in contact with the mounting plate and the pressure ring.

4. The elastic floating adjustable sizing sleeve according to claim 1, characterized in that: The transmission assembly comprises: An adjusting screw ring, the pull rod is connected to the bottom surface of the adjusting screw ring, and the threaded head at the end of the pull rod is threadedly connected to the adjusting screw ring; A rotating nut is rotatably arranged on the mounting plate and is connected to the adjusting screw ring through threads.

5. The elastic floating adjustable sizing sleeve according to claim 4, characterized in that: The elastic force provided by the spring is transmitted to the rotating nut through the pull rod and the adjusting screw ring in sequence, eliminating the gap between the adjusting screw ring and the rotating nut, and at the same time pulling the rotating nut and making it stick to the mounting plate.

6. The elastic floating adjustable sizing sleeve according to claim 1, characterized in that: A handle is installed on the rotating nut, and the rotating nut is driven to rotate by the handle. The adjusting screw ring moves axially along the thread of the rotating nut and drives the pull rod to move. At this time, the pressure ring causes the deformation part to deform toward or away from the axis.

7. The elastic floating adjustable sizing sleeve according to claim 1, characterized in that: The transmission assembly also includes a limit block, which is arranged on the end surface of the adjusting screw ring away from the mounting plate, and one end of the limit block extends outwardly to the top surface of the rotating nut.

8. The elastic floating adjustable calibrating sleeve according to claim 1, characterized in that: Also included is a water cooling assembly having: a water jacket, which is arranged on the mounting plate; A water nozzle is connected to the water jacket and is used to transport cooling water. The cooling water is transported into the water jacket through the water nozzle and then flows into the sizing sleeve body for cooling.

9. The elastic floating adjustable calibrating sleeve according to claim 1, characterized in that: A coarse adjustment scale is engraved on the outer wall surface of the water jacket. When the rotating nut rotates one circle, the adjusting screw ring moves a preset number of grids along the coarse adjustment scale.

10. The elastic floating adjustable calibrating sleeve according to claim 1, characterized in that: The surface of the mounting plate is engraved with annularly distributed fine-tuning scales, and the rotating nut accurately controls the axial movement of the pressure ring through the fine-tuning scales during the rotation process.

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