Uniform extrusion structure of PE pipe extruder

Abstract

The utility model relates to the technical field of extruders, in particular to a uniform extrusion structure of a PE pipe extruder, which comprises a base and a charging barrel arranged on the base, an extrusion screw is mounted in the charging barrel, and during use, the output end of a driving motor drives a driving wheel, the extrusion screw and a filtering part to rotate synchronously; the vibrating and knocking rod is driven by the synchronous belt and the driven wheel to rotate, the extrusion screw rotates to push molten materials to be rotationally conveyed towards the machine head, the vibrating and knocking rod rotates in the vibrating cavity to vibrate and knock bubbles attached to the inner wall of the charging barrel, and when the molten materials possibly wrapped with the bubbles are conveyed to the position of the filtering part, the bubbles can be filtered out. The air guide groove in the end face of the filtering part in the rotating state can stir bubbles to float upwards, the bubbles turned to the upper portion of the inner cavity of the material barrel are discharged through the exhaust valve above, and the quality of PE pipe products is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of extruders, in particular to a uniform extrusion structure of a PE pipe extruder. Background Art

[0002] When the existing PE pipes are extruded and formed by an extruder, granular raw materials enter from the hopper, and the granular raw materials are conveyed into the barrel by the rotation of the extrusion screw. A heating coil for melting the granular raw materials is also arranged in the barrel. After the raw materials are heated and melted, they are further extruded for plasticization, and finally are extruded and formed from the die through the perforated plate in the head.

[0003] For example, the Chinese patent with the application number CN201420364734.3 discloses a high-speed extrusion forming device for PE pipes, including an extruder. The extruder is provided with a barrel, an extrusion screw is arranged in the barrel, the extrusion screw is in transmission connection with an extrusion motor, a hopper is arranged on the barrel, a barrel heating device is arranged outside the barrel, the barrel is connected with a head, and a flow dividing plate is arranged at the connection between the barrel and the head. Its advantages are: smooth feeding, high fluidity of the plastic melt, increased extrusion speed, energy saving, long service life, fast heating speed, no need for maintenance, greatly reducing production costs and improving the product qualification rate. However, in actual use, there will be trace bubbles in the plastic melt conveyed in the barrel. If they cannot be removed in time, pores will appear on the body or wall surface of the formed PE pipe, affecting the quality of PE pipe products. Summary of the Utility Model

[0004] In view of this, the purpose of the present utility model is to provide a uniform extrusion structure of a PE pipe extruder to solve the technical problem that in the prior art, when there are trace bubbles in the plastic melt conveyed in the barrel and cannot be removed in time, pores will appear on the body or wall surface of the formed PE pipe, affecting the quality of PE pipe products.

[0005] Based on the above purpose, the present utility model provides a uniform extrusion structure of a PE pipe extruder, including a machine base and a barrel arranged on the machine base. An extrusion screw is installed in the barrel, and a hopper is arranged at the upper end of the barrel. The uniform extrusion structure includes:

[0006] A head, the head is installed at the side end of the barrel through an adapter tube, an exhaust valve is installed at the upper end of the head, and a screen is installed inside the head;

[0007] A vibration cavity is also opened in the barrel, and a vibration knocking rod is rotatably installed in the vibration cavity;

[0008] A driving assembly for driving the extrusion screw and the vibration knocking rod to rotate;

[0009] A filtering part is installed at the end of the extrusion screw, and the filtering part is installed on the machine head;

[0010] The filtering part is provided with filter holes for filtering, and a gas guiding groove for exhausting gas is also provided on the side end surface of the filtering part, and the gas guiding groove corresponds to an exhaust valve.

[0011] Furthermore, the driving assembly includes a driving motor, a driving wheel and a driven wheel. The driving motor is installed on the machine base, the output end of the driving motor is connected to the extrusion screw, the driving wheel is installed on the output shaft of the driving motor, the driven wheel is installed on the shock rod, and the driven wheel is connected to the driving wheel through a synchronous belt.

[0012] Furthermore, the outer edge of the shock rod is made of rubber material, and the outer edge of the shock rod is in intermittent contact with the inner top wall of the vibration cavity.

[0013] Furthermore, the connecting cylinder is a split component and is detachably installed on the side end of the barrel.

[0014] Furthermore, the filtering part is detachably installed at the end of the extrusion screw, and the side end surface of the filtering part extends beyond the side end surface of the machine head.

[0015] Furthermore, the filtering part is rotatably installed at the end of the machine head, and there is a flow gap between the filtering part and the screen.

[0016] The beneficial effects of the present utility model: When using the uniform extrusion structure of a PE pipe extruder of the present utility model, the output end of the driving motor drives the driving wheel, the extrusion screw and the filtering part to rotate synchronously, and drives the shock rod to rotate through the synchronous belt and the driven wheel. The rotation of the extrusion screw advances the molten material to be rotated and conveyed towards the machine head. The rotation of the shock rod in the vibration cavity will shock the bubbles attached to the inner wall of the barrel. When the molten material that may be wrapped with bubbles is conveyed to the position of the filtering part, the gas guiding groove on the end surface of the rotating filtering part will stir the bubbles to float upward, and the bubbles turned to the upper part of the inner cavity of the barrel will be discharged through the exhaust valve above, ensuring the quality of the PE pipe product. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only those of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a structural schematic diagram of the present utility model;

[0019] Figure 2Schematic diagram of the connection relationship between the drive assembly, the extrusion screw and the shock rod in the present utility model;

[0020] Figure 3 Schematic diagram of the structure of the barrel in the present utility model;

[0021] Figure 4 Assembly schematic diagram of the machine head and the filtering part in the present utility model;

[0022] Figure 5 Explosion diagram of the machine head, the screen and the filtering part in the present utility model;

[0023] Figure 6 Schematic diagram of the connection relationship between the machine head, the connecting cylinder and the exhaust valve in the present utility model.

[0024] The markings in the figure are:

[0025] 1. Machine base; 2. Barrel; 3. Extrusion screw; 4. Hopper; 5. Machine head; 6. Connecting cylinder; 7. Exhaust valve; 8. Screen; 9. Vibration cavity; 10. Shock rod; 11. Filtering part; 12. Filter holes; 13. Air guiding grooves; 14. Driving motor; 15. Driving wheel; 16. Driven wheel; 17. Timing belt. Specific embodiments

[0026] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the following further elaborates on the present utility model in conjunction with specific embodiments.

[0027] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the present utility model should have the ordinary meanings understood by those with ordinary skills in the field to which the present utility model belongs. The "first", "second" and similar terms used in the present utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to indicate relative position relationships, and when the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0028] In the first aspect of the present utility model, a uniform extrusion structure of a PE pipe extruder is proposed, as shown in Figure 1 , Figure 2 , Figure 3As shown in the figure, it includes a machine base 1 and a barrel 2 provided on the machine base 1. An extrusion screw 3 is installed inside the barrel 2, and a hopper 4 is provided at the upper end of the barrel 2. The uniform extrusion structure includes:

[0029] A head 5, the head 5 is installed at the side end of the barrel 2 through an adapter tube 6. An exhaust valve 7 is installed at the upper end of the head 5, and a screen 8 is installed inside the head 5;

[0030] A vibration cavity 9 is also opened inside the barrel 2, and a shock rod 10 is rotatably installed in the vibration cavity 9;

[0031] A driving assembly for driving the extrusion screw 3 and the shock rod 10 to rotate;

[0032] A filtering part 11 is installed at the end of the extrusion screw 3, and the filtering part 11 is installed on the head 5;

[0033] Filter holes 12 for filtering are opened on the filtering part 11, and air guiding grooves 13 for exhausting air are also opened on the side end surface of the filtering part 11. The air guiding grooves 13 correspond to the exhaust valve 7.

[0034] In this embodiment, the driving assembly includes a driving motor 14, a driving wheel 15 and a driven wheel 16. The driving motor 14 is installed on the machine base 1. The output end of the driving motor 14 is connected to the extrusion screw 3. The driving wheel 15 is installed on the output shaft of the driving motor 14. The driven wheel 16 is installed on the shock rod 10, and the driven wheel 16 is connected to the driving wheel 15 through a synchronous belt 17.

[0035] In this embodiment, during use, the granular raw material enters from the hopper 4 and is melted in the barrel 2 by a heating coil. The driving assembly drives the extrusion screw 3 and the shock rod 10 to rotate simultaneously, that is, the driving motor 14 is started so that its output end drives the driving wheel 15, the extrusion screw 3 and the filtering part 11 to rotate synchronously, and the shock rod 10 is driven to rotate through the synchronous belt 17 and the driven wheel 16. The rotation of the extrusion screw 3 advances the molten material to rotate and convey towards the head 5. The rotation of the shock rod 10 in the vibration cavity 9 will shock the bubbles attached to the inner wall of the barrel 2. When the molten material that may be wrapped with bubbles is conveyed to the position of the filtering part 11, the air guiding grooves 13 on the end surface of the rotating filtering part 11 will stir the bubbles to float upward. The bubbles flipped to the upper part of the inner cavity of the barrel 2 are then discharged through the exhaust valve 7 above, and then the molten material after removing the bubbles is filtered through the filter holes 12 and the screen 8 in sequence and then extruded and formed from the die of the head 5.

[0036] In this embodiment, as Figure 2 And Figure 3As shown, the outer edge of the shock rod 10 is made of rubber, and the outer edge of the shock rod 10 is in intermittent contact with the inner top wall of the vibration chamber 9. The outer edge of the shock rod 10 made of rubber will strike the inner top wall of the vibration chamber 9 at a high frequency to continuously ensure that there are no attached air bubbles on the inner wall of the lower part of the barrel 2.

[0037] In this embodiment, as Figure 1 , Figure 6 shown, the connecting cylinder 6 is a split member, which is detachably installed at the side end of the barrel 2, so that after the extruder is used, the connecting cylinder 6 can be removed to facilitate timely cleaning of the inside of the extruder.

[0038] In addition, as Figure 4 , Figure 5 shown, the filtering part 11 is detachably installed at the end of the extrusion screw 3, and the side end surface of the filtering part 11 extends beyond the side end surface of the head 5, so that the filtering part 11 and the screen 8 attached with filtering residues can be quickly disassembled and cleaned.

[0039] In addition, preferably, as Figure 4 , Figure 5 shown, the filtering part 11 is rotatably installed at the end of the head 5, and there is a flow gap between the filtering part 11 and the screen 8. The molten material in the rotating conveying state enters the flow gap between the filtering part 11 and the screen 8 in an obliquely injected manner, and finally is extruded and formed from the die of the head 5 to make a PE pipe.

[0040] Those of ordinary skill in the art should understand that: the discussion of any above embodiment is only exemplary, and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; under the idea of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.

[0041] The present invention aims to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A uniform extrusion structure of a PE pipe extruder, comprising a machine base (1) and a barrel (2) provided on the machine base (1). An extrusion screw (3) is installed in the barrel (2), and a hopper (4) is provided at the upper end of the barrel (2). It is characterized in that, The uniform extrusion structure includes: a head (5), the head (5) is installed at the side end of the barrel (2) through an adapter cylinder (6), an exhaust valve (7) is installed at the upper end of the head (5), and a screen (8) is installed inside the head (5); a vibration cavity (9) is also formed in the barrel (2), and a vibration knocking rod (10) is rotatably installed in the vibration cavity (9); a driving assembly for driving the extrusion screw (3) and the vibration knocking rod (10) to rotate; a filtering part (11) is installed at the end of the extrusion screw (3), and the filtering part (11) is installed on the head (5); filtering holes (12) for filtering are formed in the filtering part (11), and air guiding grooves (13) for exhausting air are also formed on the side end surface of the filtering part (11), and the air guiding grooves (13) correspond to the exhaust valve (7).

2. The uniform extrusion structure of a PE pipe extruder according to claim 1, characterized in that, The driving assembly includes a driving motor (14), a driving wheel (15) and a driven wheel (16). The driving motor (14) is installed on the machine base (1), the output end of the driving motor (14) is connected to the extrusion screw (3), the driving wheel (15) is installed on the output shaft of the driving motor (14), the driven wheel (16) is installed on the vibration knocking rod (10), and the driven wheel (16) is connected to the driving wheel (15) through a synchronous belt (17).

3. The uniform extrusion structure of a PE pipe extruder according to claim 1 or 2, characterized in that, The outer edge of the vibration knocking rod (10) is made of rubber material, and the outer edge of the vibration knocking rod (10) is in intermittent contact with the inner top wall of the vibration cavity (9).

4. The uniform extrusion structure of a PE pipe extruder according to claim 1, characterized in that, The adapter cylinder (6) is a split component and is detachably installed at the side end of the barrel (2).

5. The uniform extrusion structure of a PE pipe extruder according to claim 1, characterized in that, The filtering part (11) is detachably installed at the end of the extrusion screw (3), and the side end surface of the filtering part (11) extends beyond the side end surface of the head (5).

6. The uniform extrusion structure of a PE pipe extruder according to claim 1 or 5, characterized in that, The filtering part (11) is rotatably installed at the end of the head (5), and there is a flow gap between the filtering part (11) and the screen (8).

Images