Forming structure for extruding HDPE (High-Density Polyethylene) pipe

Abstract

The utility model discloses a forming structure for extruding an HDPE (High-Density Polyethylene) pipe, which relates to the technical field of pipe processing and comprises a bottom plate, a U-shaped frame is arranged at the upper end of the bottom plate, a plurality of supporting plates distributed in a linear array are arranged in the middle of the upper end of the bottom plate, through grooves are formed in the left end and the right end of the U-shaped frame, a fan is arranged at the upper end of the U-shaped frame, and a fan blade is arranged at the lower end of the fan. A hollow plate is arranged on the upper inner wall of the U-shaped frame, a plurality of air nozzles are connected to the lower end of the hollow plate in a penetrating mode, circular rings are installed at the upper ends of the supporting plates, shaping grooves are formed in the left ends of the circular rings, and a set of rotatable shaping wheels are arranged in each shaping groove; and three shaping wheels are arranged in each group and are distributed in an annular array. According to the utility model, the moving part and the driving part are matched together to drive the plurality of shaping wheels to move, so that the operation is simple, the operation steps and time are reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe processing, in particular to a forming structure for HDPE pipe extrusion. Background Art

[0002] HDPE, also known as high-density polyethylene, is a highly crystalline, non-polar thermoplastic resin. The appearance of the original HDPE is milky white, and it is somewhat translucent in thin cross-sections. It has excellent electrical properties, high insulation dielectric strength, and excellent impact resistance in medium to high molecular weight grades.

[0003] The prior art (announcement number: CN 211891908 U) discloses an extrusion shaping device for the production of HDPE high and low voltage power cable protection pipes, including a table, a limiting device and a horizontal component. An extrusion die is installed on the left side of the upper end surface of the table, and a horizontal plate is provided at the upper end of the right side of the table. The horizontal plate is arranged parallel to the table, and horizontal components are inlaid at the four corners of the upper end surface of the horizontal plate; multiple groups of the limiting devices are arranged side by side, and multiple groups of the limiting devices are all slidably installed on the upper end surface of the horizontal plate, and multiple groups of the limiting devices are all arranged perpendicular to the horizontal plate; the limiting device includes a first support frame, a second support frame, a roller frame, a first roller, a second roller, a second support screw and a second adjusting nut.

[0004] Although the above patent effectively prevents the deformation of the pipe during shaping and keeps the pipe straight and cools quickly, it has the following disadvantages. During shaping, it is necessary to adjust the position of the first roller 14 according to the model of the pipe with the cooperation of the second support screw 17 and the second adjusting nut 18, so that the distance between the first roller 14 and the second roller 15 matches the model of the pipe. During adjustment, it is necessary to adjust multiple sets of support screws 17 and second adjusting nuts 18. The operation steps are many and the operation time is long, which affects work efficiency. For this reason, a forming structure for HDPE pipe extrusion is proposed. Utility Model Content

[0005] The main purpose of the utility model is to provide a forming structure for HDPE pipe extrusion, which can effectively solve the problems in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A forming structure for HDPE pipe extrusion comprises a base plate, a U-shaped frame is installed on the upper end of the base plate, a plurality of support plates distributed in a linear array are installed in the middle of the upper end of the base plate, the left and right ends of the U-shaped frame are provided with through grooves, a fan is installed on the upper end of the U-shaped frame, a hollow plate is provided on the upper inner wall of the U-shaped frame, a plurality of air nozzles are inserted and connected at the lower end of the hollow plate, a circular ring is installed on the upper end of the plurality of support plates, a shaping groove is provided on the left end of the plurality of circular rings, a group of rotatable shaping wheels is provided in the plurality of shaping grooves, each group of the shaping wheels is provided with three shaping wheels and distributed in a ring array, and the plurality of shaping wheels can synchronously approach or move away from the center position of the shaping groove.

[0008] Preferably, annular grooves are provided in several of the circular rings, and moving parts are provided in several of the annular grooves. A driving part is installed on the right upper end of the base plate, and the driving part and the moving part are used to drive multiple shaping wheels to move synchronously.

[0009] Preferably, the moving component includes an external gear, which is rotatably connected in an annular groove, and the inner cylindrical surface of the external gear is fixedly sleeved with an internal gear, and the internal gear is meshedly connected with three first gears distributed in an annular array, and the first gears are rotatably connected in the annular groove, and the three first gears are all meshedly connected with a rack.

[0010] Preferably, the outer surfaces of the plurality of rings are each provided with three slide grooves distributed in a ring array, and the slide grooves extend into the shaping groove.

[0011] Preferably, the rack is slidably connected in the slide groove, one end of the rack extends to the outside of the ring, and one end of the rack extends into the shaping groove and is fixedly connected to the shaping wheel.

[0012] Preferably, the driving component includes a vertical plate, which is installed on the base plate. A motor is installed at the right end of the vertical plate. The output end of the motor movably passes through the vertical plate and is fixedly connected to a connecting rod. The connecting rod movably inserts into the circular ring, and the outer surface of the connecting rod is fixedly sleeved with several second gears.

[0013] Preferably, the second gear is located in the annular groove, and the second gear is meshed with the external gear.

[0014] Preferably, the lower end of the hollow plate is fixedly connected to the upper rack, and the fan is connected to the hollow plate through a hose.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The moving parts and the driving parts work together to drive multiple shaping wheels to move. When the size of the pipe is small, the control motor drives the connecting rod to rotate, and the connecting rod drives multiple second gears to rotate. The second gear drives the outer gear and the inner gear to rotate, and the inner gear drives the three first gears to rotate at the same time. The first gear drives the three racks to move closer to each other, so that the three shaping wheels on one side move closer to each other, so that smaller-sized pipes can be shaped and supported. The operation is simple, the operation steps and time are reduced, and the work efficiency is improved.

[0017] 2. The rack can drive the hollow plate and the air nozzle to move up and down. When the rack moves, the upper rack drives the hollow plate to move, so that the air nozzle maintains a suitable distance from the pipe of other diameters, which helps to maintain uniform temperature distribution of the pipe and prevent local overheating, thereby improving the molding quality and reducing manual intervention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the entire structure proposed in this embodiment;

[0019] Figure 2 2 is a schematic diagram of the structure from another perspective in this embodiment;

[0020] Figure 3 Schematic diagram of the structure of the moving parts in this embodiment;

[0021] Figure 4 Schematic diagram of the structure of the driving component in this embodiment.

[0022] In the figure: 1. bottom plate; 2. U-shaped frame; 3. through groove; 4. fan; 5. support plate; 6. circular ring; 7. shaping groove; 8. moving part; 9. driving part; 10. hollow plate; 11. air nozzle; 12. shaping wheel; 13. annular groove; 61. slide groove; 81. inner gear; 82. outer gear; 83. first gear; 84. rack; 91. vertical plate; 92. motor; 93. connecting rod; 94. second gear. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0026] like Figures 1-4 As shown, a forming structure for extrusion of HDPE pipes includes a bottom plate 1, a U-shaped frame 2 is installed on the upper end of the bottom plate 1, and a plurality of support plates 5 distributed in a linear array are installed in the middle of the upper end of the bottom plate 1. The left and right ends of the U-shaped frame 2 are provided with through grooves 3, and the upper end of the U-shaped frame 2 is provided with a fan 4. The upper inner wall of the U-shaped frame 2 is provided with a hollow plate 10, and the lower end of the hollow plate 10 is connected with a plurality of air nozzles 11. The upper ends of the plurality of support plates 5 are provided with circular rings 6, and the left ends of the plurality of circular rings 6 are provided with shaping grooves 7. The through grooves 3 and the shaping grooves 7 are located on the same horizontal line. A group of rotatable shaping wheels 12 are provided in the shaping groove 7, and each group of shaping wheels 12 is provided with three and distributed in a circular array. When in use, the extruded HDPE pipe is pulled into the shaping groove 7 through the through groove 3, so that the shaping wheels 12 support and shape the pipe to prevent the pipe from deformation. The power of the fan 4 is turned on, and the fan 4 conveys cold air into the hollow plate 10, and sprays it from the air nozzle 11 to the surface of the pipe to cool the pipe. However, when shaping pipes of other sizes, it is necessary to adjust the distance between multiple shaping wheels 12 separately, which requires many operation steps and a long operation time.

[0027] In order to solve the above-mentioned drawbacks, a driving component 9 and a moving component 8 are provided to drive multiple shaping wheels 12 to move synchronously, and a moving component 8 is provided in each of the annular grooves 13. A driving component 9 is installed on the upper right part of the base plate 1, and annular grooves 13 are opened in each of the rings 6.

[0028] Specifically: the moving component 8 includes an external gear 82, which is rotatably connected to the annular groove 13 through a bearing, and an internal gear 81 is fixedly sleeved on the inner cylindrical surface of the external gear 82. The internal gear 81 is meshed with three first gears 83 distributed in an annular array, and the first gear 83 is rotatably connected to the annular groove 13 through a rotating shaft. The three first gears 83 are all meshed with racks 84, and the outer surfaces of several rings 6 are provided with three slide grooves 61 distributed in an annular array. The slide groove 61 extends into the shaping groove 7, and the rack 84 is slidably connected to the slide groove 61 through a T-shaped slide rail. One end of the rack 84 extends to the outside of the ring 6, and one end of the rack 84 extends into the shaping groove 7 and is fixedly connected to the shaping wheel 12 through bolts. The driving component 9 includes a vertical plate 91, which is mounted on the base plate 1, and a motor 92 is mounted on the right end of the vertical plate 91. The motor 92 is a servo motor, and the output end of the motor 92 movably passes through the vertical plate 91 and is fixedly connected to the connecting The rod 93 and the connecting rod 93 are movably inserted into the ring 6. The outer surface of the connecting rod 93 is fixedly sleeved with several second gears 94. The second gears 94 are located in the annular groove 13. The second gears 94 are meshed with the outer gear 82. When the size of the pipe is small, the control motor 92 drives the connecting rod 93 to rotate, and the connecting rod 93 drives multiple second gears 94 to rotate. The second gear 94 drives multiple outer gears 82 and multiple inner gears 81 to rotate at the same time. The multiple inner gears 81 simultaneously drive the three adjacent first gears 83 to rotate at the same time. The three adjacent first gears 83 simultaneously drive the three racks 84 to approach each other, so that the three shaping wheels 12 on one side are close to each other, so that the smaller-sized pipes can be shaped and supported. The operation is simple, the operation steps and time are reduced, and the work efficiency is improved. When the pipe size is large, the control motor 92 drives the connecting rod 93 to rotate in the opposite direction, driving the three shaping wheels 12 on one side away from each other.

[0029] In addition, when the diameter of the fixed pipe changes, the distance between the air nozzle 11 and the pipe will change. When the diameter of the pipe is small, the distance between the air nozzle 11 and the pipe becomes larger, resulting in poor cooling effect. The position of the hollow plate 10 needs to be adjusted. For this purpose, the lower end of the hollow plate 10 is fixedly connected to the upper rack 84, and the upper end of the hollow plate 10 and the upper wall of the U-shaped frame 2 are both in a gap to facilitate the movement of the hollow plate 10. The fan 4 is connected to the hollow plate 10 through a hose, and the upper rack 84 drives the hollow plate 10 to move, so that the air nozzle 11 maintains a suitable distance from the pipe of other diameters, which helps to maintain uniform temperature distribution of the pipe and prevent local overheating, thereby improving the molding quality. No manual adjustment by workers is required, reducing human intervention.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A forming structure for HDPE pipe extrusion, comprising a base plate (1), characterized in that: A U-shaped frame (2) is installed on the upper end of the base plate (1), and a plurality of support plates (5) distributed in a linear array are installed in the middle of the upper end of the base plate (1). The left and right ends of the U-shaped frame (2) are both provided with through slots (3). A fan (4) is installed on the upper end of the U-shaped frame (2). A hollow plate (10) is provided on the upper inner wall of the U-shaped frame (2). The lower end of the hollow plate (10) is connected with a plurality of air nozzles (11). A circular ring (6) is installed on the upper end of the plurality of support plates (5). The left ends of the plurality of circular rings (6) are provided with a shaping groove (7). A group of rotatable shaping wheels (12) are provided in the plurality of shaping grooves (7). Each group of shaping wheels (12) is provided with three shaping wheels distributed in a circular array. The plurality of shaping wheels (12) can synchronously approach or move away from the center position of the shaping groove (7).

2. The HDPE pipe extrusion molding structure according to claim 1, characterized in that: Annular grooves (13) are provided in a plurality of the circular rings (6), and movable components (8) are provided in a plurality of the annular grooves (13). A driving component (9) is installed on the right upper end of the base plate (1), and the driving component (9) and the movable component (8) are used to drive the plurality of shaping wheels (12) to move synchronously.

3. The HDPE pipe extrusion molding structure according to claim 2, characterized in that: The moving component (8) includes an external gear (82), which is rotatably connected in the annular groove (13). The inner cylindrical surface of the external gear (82) is fixedly sleeved with an internal gear (81), and the internal gear (81) is meshedly connected with three first gears (83) distributed in an annular array. The first gears (83) are rotatably connected in the annular groove (13), and the three first gears (83) are all meshedly connected with a rack (84).

4. The HDPE pipe extrusion molding structure according to claim 3, characterized in that: The outer surfaces of the plurality of circular rings (6) are each provided with three slide grooves (61) distributed in a ring array, and the slide grooves (61) extend into the shaping groove (7).

5. The HDPE pipe extrusion molding structure according to claim 4, characterized in that: The rack (84) is slidably connected in the slide groove (61), one end of the rack (84) extends to the outside of the ring (6), and one end of the rack (84) extends into the shaping groove (7) and is fixedly connected to the shaping wheel (12).

6. The HDPE pipe extrusion molding structure according to claim 5, characterized in that: The driving component (9) includes a vertical plate (91), the vertical plate (91) is mounted on the bottom plate (1), a motor (92) is mounted on the right end of the vertical plate (91), an output end of the motor (92) movably passes through the vertical plate (91) and is fixedly connected to a connecting rod (93), the connecting rod (93) movably inserts into the ring (6), and a plurality of second gears (94) are fixedly sleeved on the outer surface of the connecting rod (93).

7. The HDPE pipe extrusion molding structure according to claim 6, characterized in that: The second gear (94) is located in the annular groove (13), and the second gear (94) is meshed with the external gear (82).

8. The HDPE pipe extrusion molding structure according to claim 3, characterized in that: The lower end of the hollow plate (10) is fixedly connected to the upper rack (84), and the fan (4) is connected to the hollow plate (10) through a hose.

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