A corrugated pipe forming extrusion head

Abstract

The utility model relates to the technical field of bellows forming accessories, and specifically discloses a bellows forming extrusion head, comprising an air inlet pipe and a feed pipe, wherein the feed pipe is sleeved on the surface of the air inlet pipe so that the inner wall of the feed pipe and the outer wall of the air inlet pipe form an extrusion cavity, and a core tube is detachably installed at one end of the air inlet pipe close to the discharge end of the extrusion cavity, and the core tube is hollow at one end close to the air inlet pipe, and an air outlet hole connected to the air inlet pipe is opened on the core tube, and a plurality of tube wall extrusion core tubes are sleeved on the core tube; the bellows forming extrusion head allows the inner wall of the tube material to be quickly air-dried and formed into a smooth shape, so that when the subsequent tube material enters the corrugated forming mold to form the corrugation, the inner wall of the tube material will not be corrugated, and the structure of the entire extrusion head is relatively simple and the cost is relatively low.

Description

Technical Field

[0001] The utility model relates to the technical field of bellows forming accessories, in particular to a bellows forming extrusion head. Background Art

[0002] During the molding process of plastic corrugated pipes, usually a tubular pipe material is extruded from an extruder or an extrusion die. Then, before the pipe material dries up, it enters a corrugation forming die. The corrugation forming die is used to extrude the surface of the pipe material into a corrugated shape. However, since the overall plasticity of the pipe material is relatively high before it dries up, the inner wall of the pipe material will also be extruded into a corrugated shape during the process of extruding the surface into a corrugated shape, so that both the inner and outer walls of the corrugated pipe have corrugations. This will cause the flow rate of the water to slow down when the corrugated pipe is used in a water pipe.

[0003] Therefore, a forming extrusion head is needed that can prevent corrugations from appearing on the inner wall of the corrugated tube after the corrugated tube is formed. Utility Model Content

[0004] In order to overcome the defects of the prior art, the utility model provides a corrugated tube forming extrusion head, aiming to solve the problems in the prior art.

[0005] The utility model adopts the following technical solution to solve the technical problem: a corrugated tube forming extrusion head, comprising an air inlet pipe and a feed pipe, wherein the feed pipe is sleeved on the surface of the air inlet pipe so that the inner wall of the feed pipe and the outer wall of the air inlet pipe form an extrusion cavity, a core tube is detachably mounted on one end of the air inlet pipe close to the discharge end of the extrusion cavity, the core tube is hollow at one end close to the air inlet pipe, an air outlet hole connected to the air inlet pipe is provided on the core tube, and a plurality of tube wall extrusion core tubes are sleeved on the core tube.

[0006] In the above-mentioned corrugated tube forming extrusion head, the air inlet pipe comprises an air inlet section, one end of the air inlet section is the air inlet end, and the other end is provided with a tapered section, an air pipe is provided at the end of the tapered section away from the air inlet section, the extrusion cavity is formed between the outer wall of the air pipe and the feed pipe, a buffer section is provided at the end of the air pipe away from the tapered section, and the core tube is detachably connected to the buffer section.

[0007] In the above-mentioned corrugated tube forming extrusion head, the inner diameter of the buffer section is larger than the inner diameter of the air pipe.

[0008] In the above-mentioned corrugated tube forming extrusion head, the buffer section is provided with an internal thread, and the outer wall of one end of the core tube close to the air outlet is provided with an external thread matching the internal thread.

[0009] In the above-mentioned corrugated tube forming extruder head, the feed pipe includes a feed section, one end of the feed section is provided with a threaded section, and the other end is provided with a forming section, the feed section is sleeved on the conical section, and the forming section is sleeved on the air pipe, and the extrusion cavity is formed between the feed section and the conical section, and between the air pipe and the forming section.

[0010] In the above-mentioned corrugated tube forming extrusion head, a limiting core is arranged at one end of the core tube away from the air inlet pipe, the outer diameter of the limiting core is the same as the outer diameter of the tube wall extrusion core tube, the outer wall of one end of the tube wall extrusion core tube has an inclined section, and the outer diameter of the limiting core is larger than the outer diameter of the core tube, so that a drying area is formed on the outside of the core tube.

[0011] The beneficial effects of the utility model are as follows: the tube material is extruded through the extrusion cavity, so that the tube material is sleeved on the mold core tube, the air inlet pipe is ventilated, and the air flow is output from the air outlet, so that the air flow flows in the tube material, and at the same time, multiple tube wall extrusion core tubes extrude the inner wall of the tube material, so that the inner wall of the tube material is quickly dried and formed into a smooth shape, so that when the subsequent tube material enters the corrugated forming mold to form the corrugation, the inner wall of the tube material will not appear corrugated, and the structure of the entire extrusion head is relatively simple and the cost is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of the corrugated tube forming extrusion head of the utility model.

[0013] Figure 2 It is a schematic diagram of the three-dimensional structure of the intake pipe.

[0014] Figure 3 It is a schematic diagram of the three-dimensional structure of the feed pipe.

[0015] Figure 4 for Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0016] In the figure: an air inlet pipe fitting 1, a feed pipe fitting 2, a mold core tube 3, a tube wall extrusion core tube 4, a limiting core 5, an air inlet section 6, a tapered section 7, an air pipe 8, a buffer section 9, a threaded section 10, a feed section 11, a molding section 12, and an air outlet 13. DETAILED DESCRIPTION

[0017] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0018] Combination Figures 1 to 4The corrugated tube forming extrusion head shown in the figure comprises an air inlet pipe 1 and a feed pipe 2, the feed pipe 2 is sleeved on the surface of the air inlet pipe 1 so that the inner wall of the feed pipe 2 and the outer wall of the air inlet pipe 1 form an extrusion cavity, and a core tube 3 is detachably installed at one end of the air inlet pipe 1 close to the discharge end of the extrusion cavity, the core tube 3 is hollow at one end close to the air inlet pipe 1, and an air outlet hole 13 connected to the air inlet pipe 1 is opened on the core tube 3, and a plurality of pipe wall extrusion core tubes are sleeved on the core tube 3 4; In this embodiment, the tube material is extruded through the extrusion cavity, so that the tube material is sleeved on the mold core tube 3, the air inlet pipe 1 is ventilated, and the air flow is output from the air outlet 13, so that the air flow flows in the tube material. At the same time, multiple tube wall extrusion core tubes 4 extrude the inner wall of the tube material, so that the inner wall of the tube material is quickly dried and formed into a smooth shape, so that when the subsequent tube material enters the corrugated forming mold to form a corrugated shape, the inner wall of the tube material will not appear corrugated, and the structure of the entire extrusion head is relatively simple and the cost is relatively low.

[0019] like Figure 2 As shown, the air intake pipe fitting 1 of this embodiment includes an air intake section 6, one end of the air intake section 6 is the air intake end, and the other end is provided with a tapered section 7, an air pipe 8 is provided at the end of the tapered section 7 away from the air intake section 6, an extrusion cavity is formed between the outer wall of the air pipe 8 and the feed pipe fitting 2, and a buffer section 9 is provided at the end of the air pipe 8 away from the tapered section 7, and the core tube 3 is detachably connected to the buffer section 9; air is taken in through the air intake end, and when entering the tapered section 7, the airflow can be pressurized and accelerated, so that the airflow quickly enters the air pipe 8 and the buffer section 9, and then the airflow is slowed down by the buffer section 9, so that the airflow is in gentle contact with the inner wall of the pipe material, so as to prevent the quality of the pipe material from being affected by the high-pressure airflow.

[0020] It is worth noting that the inner diameter of the buffer section 9 of this embodiment is larger than the inner diameter of the air pipe 8, so that the airflow entering the buffer section 9 can relieve its pressure and can quickly accommodate more airflow so that a large amount of airflow contacts the inner wall of the pipe.

[0021] It should also be noted that the buffer section 9 of this embodiment is provided with an internal thread, and the outer wall of one end of the core tube 3 close to the air outlet 13 is provided with an external thread matching the internal thread; the core tube 3 can be dismantled or assembled through the threaded connection.

[0022] like Figure 3As shown, the feed pipe fitting 2 of this embodiment includes a feed section 11, one end of the feed section 11 is provided with a threaded section 10, and the other end is provided with a forming section 12, the feed section 11 is sleeved on the tapered section 7, and the forming section 12 is sleeved on the air pipe 8, and an extrusion cavity is formed between the feed section 11 and the tapered section 7, and between the air pipe 8 and the forming section 12; the feed pipe fitting 2 can be installed on the extrusion equipment through the threaded section 10, and the material enters the extrusion cavity and is extruded through the extrusion cavity to form a pipe material, so that the pipe material is sleeved on the mold core tube 3, so that the inner wall of the pipe material can be quickly dried by the airflow, and at the same time, the inner wall of the pipe material is squeezed by multiple pipe wall extrusion core tubes 4 to form a smooth shape, and the airflow can better form a hollow shape inside the pipe material, so that during the extrusion process of the pipe material, when it is continuously transported forward, the friction between the inner wall of the pipe material and the pipe wall extrusion core tube 4 can be reduced.

[0023] A limiting core 5 is provided at one end of the core tube 3 of the present embodiment away from the air inlet pipe 1. The outer diameter of the limiting core 5 is the same as the outer diameter of the tube wall extrusion core tube 4. The outer wall of one end of the tube wall extrusion core tube 4 has an inclined section. The outer diameter of the limiting core 5 is larger than the outer diameter of the core tube 3, so that a drying area is formed on the outside of the core tube 3; after the tube material is extruded, it is wrapped on the outside of the core tube 3, so that the airflow in the drying area contacts the inner wall of the tube material, and the inclined section on the tube wall extrusion core tube 4 can reduce the airflow pressure on the inner wall of the tube material, so that the inner wall of the tube material can be quickly dried on the core tube 3, so that after the tube material enters the limiting core 5, it is convenient to corrugate the outer wall of the tube material.

[0024] The above is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A corrugated pipe forming extrusion head, characterized in that: The invention comprises an air intake pipe (1) and a feed pipe (2), wherein the feed pipe (2) is sleeved on the surface of the air intake pipe (1) so that the inner wall of the feed pipe (2) and the outer wall of the air intake pipe (1) form an extrusion cavity, and a core tube (3) is detachably mounted on one end of the air intake pipe (1) close to the discharge end of the extrusion cavity, and the core tube (3) is hollow at one end close to the air intake pipe (1), and an air outlet hole (13) connected to the air intake pipe (1) is provided on the core tube (3), and a plurality of tube wall extrusion core tubes (4) are sleeved on the core tube (3).

2. A corrugated pipe forming extrusion head according to claim 1, characterized in that: The air intake pipe (1) comprises an air intake section (6), one end of the air intake section (6) is an air intake end, and the other end is provided with a tapered section (7), an air pipe (8) is provided at the end of the tapered section (7) away from the air intake section (6), an extrusion cavity is formed between the outer wall of the air pipe (8) and the feed pipe (2), a buffer section (9) is provided at the end of the air pipe (8) away from the tapered section (7), and the core pipe (3) and the buffer section (9) are detachably connected.

3. A corrugated tube forming extrusion head according to claim 2, characterized in that: The inner diameter of the buffer section (9) is greater than the inner diameter of the air pipe (8).

4. A corrugated tube forming extrusion head according to claim 2, characterized in that: The buffer section (9) is provided with an internal thread, and the outer wall of one end of the core mold tube (3) close to the air outlet (13) is provided with an external thread matching the internal thread.

5. The corrugated tube forming extrusion head according to claim 2, characterized in that: The feed pipe (2) comprises a feed section (11), one end of the feed section (11) is provided with a threaded section (10), and the other end of the feed section (11) is provided with a molding section (12), the feed section (11) is sleeved on the conical section (7), and the molding section (12) is sleeved on the air pipe (8), and the extrusion cavity is formed between the feed section (11) and the conical section (7), and between the air pipe (8) and the molding section (12).

6. The corrugated tube forming extrusion head according to claim 1, characterized in that: A limiting core (5) is provided at one end of the core mold tube (3) away from the air inlet pipe (1); the outer diameter of the limiting core (5) is the same as the outer diameter of the tube wall extrusion core tube (4); the outer wall of one end of the tube wall extrusion core tube (4) has an inclined section; the outer diameter of the limiting core (5) is greater than the outer diameter of the core mold tube (3), so that an air-drying area is formed on the outer side of the core mold tube (3).

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