Extrusion molding device and processing method for plastic pipe processing

Abstract

The technical field of the extrusion molding device for processing plastic pipes of the present invention proposes an extrusion molding device and a processing method for processing plastic pipes, including a hot melt feeding pipe, the outer end of the hot melt feeding pipe is fixedly connected to a conduit, the outer end of the conduit is fixedly connected to a first clamping plate, and the inner side of the first clamping plate is provided with an extrusion molding component. In the present invention, the detachable inner clamping tube is conveniently replaced according to the requirements of the pipe specifications, and the mold replacement method is simple; while the cooling water flowing inside the spiral cooling tube is used to cool the extruded plastic pipe, the flowing airflow is used to drive the hot air flow in the air cavity between the outer clamping tube and the inner clamping tube to discharge and accelerate the heat dissipation effect of the mold, thereby improving the cooling and molding rate of the pipe, and the flowing airflow blows the gas generated in the pipe production process into the filter box, and the exhaust gas is filtered through the filter element inside the filter plate, reducing the harm of the exhaust gas to the human body and the environment.

Description

Technical Field

[0001] The invention relates to the technical field of plastic pipe processing extrusion molding devices, and in particular to an extrusion molding device and a processing method for plastic pipe processing. Background Art

[0002] Plastic pipes are a kind of polymer material products widely used in the fields of construction, municipal engineering, petrochemical industry, etc. Plastic pipes are widely used in water supply, drainage, sewage, gas, heating and other fields, providing convenience and safety for people's lives and industrial production. Plastic pipes have many excellent properties, which are mainly manifested in the following aspects: 1. Lightweight and high strength: Compared with traditional metal pipes, plastic pipes have lower density and higher strength, which can reduce the weight of the structure itself and reduce costs.

[0003] 2. Good corrosion resistance: Plastic pipes have excellent corrosion resistance and are suitable for conveying various liquid and gas media, such as water, oil, gas, etc.

[0004] 3. Easy and quick installation: Plastic pipes can be installed without destroying the ground structure, which greatly simplifies the construction process and shortens the construction period.

[0005] 4. Strong adaptability: Plastic pipes have good flexibility and impact resistance, and can adapt to various complex geological conditions and environments.

[0006] 5. Energy saving and environmental protection: Plastic pipes have good thermal conductivity and can effectively reduce energy consumption; at the same time, plastic itself is renewable and will not produce pollutants during use.

[0007] The production process of plastic pipes includes the following steps: 1. Ingredients: Mix various raw materials (such as polyethylene, polyvinyl chloride, etc.) in a certain proportion.

[0008] 2. Plasticization: Heat the mixed raw materials above the softening point to turn them into a plastic melt state.

[0009] 3. Extrusion: The softened plastic melt is pushed into a mold through an extruder to form a continuous plastic strip.

[0010] 4. Cooling: Allow the plastic strip to cool naturally over a certain period of time to form a solid plastic pipe.

[0011] 5. Shaping: The shaped plastic pipe is subjected to shaping treatment, such as stretching, compression, etc., to obtain the desired shape and size.

[0012] 6. Inspection: Inspect the produced plastic pipes to ensure that they meet the relevant standards and quality requirements.

[0013] 7. Packaging: Pack qualified plastic pipes for transportation and storage.

[0014] Plastic pipes have various specifications. Existing plastic pipes have the following disadvantages during processing: 1. The existing plastic pipe extrusion devices have uniform mold models. When producing plastic pipes of different specifications, specific molds need to be customized. At the same time, mold replacement is complicated and inconvenient; 2. In order to speed up the extrusion molding of plastic pipes, the main method is to use cooling water to cool the mold. This method is relatively simple and the speed of pipe molding is slow; 3. Plastics will produce a large amount of waste gas during the softening and hot melting process. Untreated waste gas is very harmful to the human body and the environment.

[0015] To this end, an extrusion molding device and a processing method for plastic pipe processing are proposed, which solve the above problems through an inner clamping tube, a spiral cooling tube, an annular air guide tube and an annular processing box that are easy to disassemble and replace. Summary of the invention

[0016] The present invention provides an extrusion molding device and a processing method for plastic pipe processing, which solves the problems of inconvenient mold replacement, slow pipe cooling and molding speed, and direct exhaust gas emission that pollutes the environment in the related art.

[0017] The technical solution of the present invention is as follows: An extrusion molding device for processing plastic pipes comprises a hot melt feeding pipe, the outer end of the hot melt feeding pipe is fixedly connected to a conduit, the outer end of the conduit is fixedly connected to a first clamping plate, and an extrusion molding component is arranged on the inner side of the first clamping plate; the extrusion molding component comprises an outer clamping pipe clamped to the inner side of the first clamping plate, the inner part of the outer clamping pipe is clamped to the inner part of the outer clamping pipe, the inner part of the inner clamping pipe is fixedly connected to a molding rod, the inner clamping pipe is communicated with the conduit, a cooling cavity is provided on the inner wall of the front end of the outer clamping pipe, a spiral cooling pipe is fixedly connected to the inner part of the cooling cavity, and an annular liquid guide pipe is fixedly connected to the outer end of the outer clamping pipe.

[0018] Optionally, the conduits and the external clamping tubes are each provided with six groups and are positioned correspondingly, the annular liquid guide tubes are provided with two and are arranged at the outer ends of the six groups of the external clamping tubes, the two annular liquid guide tubes are respectively connected to the two ends of the spiral cooling tube, and the extrusion molding assembly also includes a liquid inlet pipe and a liquid outlet pipe respectively fixedly connected to the outer ends of the two annular liquid guide tubes.

[0019] Optionally, a cavity is provided between the outer clamp tube and the inner clamp tube, and the extrusion molding assembly further comprises an annular air duct symmetrically fixedly connected to the outer end of the outer clamp tube, the outer clamp tube is communicated with the annular air duct, and the top ends of the two annular air ducts are respectively fixedly connected with an air inlet pipe and an air outlet pipe.

[0020] Optionally, a shell is clamped on the inner side of the first clamping plate, a second clamping plate is clamped on a side of the shell away from the first clamping plate, and a fastening bolt is provided between the first clamping plate and the second clamping plate.

[0021] Optionally, the liquid inlet pipe and the liquid outlet pipe are clamped on the side ends of the shell, and the air inlet pipe and the air outlet pipe are symmetrically clamped on the top end of the shell.

[0022] Optionally, the outer end of the second clamping plate is fixedly connected to an annular processing box and is in communication with it. A cavity is provided inside the annular processing box. A connecting pipe is fixedly connected to the top of the annular processing box. A connecting pipe is fixedly connected between the connecting pipe and the air outlet pipe.

[0023] Optionally, a filter box is fixedly connected to the bottom end of the annular processing box, the bottom end of the filter box is communicated with the outside, a filter plate is symmetrically clamped inside the filter box, and a filter element is fixedly connected inside the filter plate.

[0024] Optionally, the side end of the hot melt feeding pipe is fixedly connected to a mixing feeding pipe, and feeding augers are provided inside the hot melt feeding pipe and the mixing feeding pipe. The top end of the mixing feeding pipe is fixedly connected to a feeding hopper, and two feeding hoppers are provided and communicated with the mixing feeding pipe.

[0025] A method for processing a plastic pipe comprises the following steps: S1. Put a variety of plastic particles and additives into the feed hopper according to the addition ratio, and mix them through the feeding auger inside the mixing feed hopper; S2. The mixed plastic particles and additives enter the hot melt feeding pipe for hot melting, and the hot melted gel fluid enters the inner card tube inside the outer card tube from the conduit; S3. The extruded colloidal fluid is formed by the forming rod, and cooling water flows from the spiral cooling tube to cool the tube at the front end of the inner card tube, and the cooling airflow flows through the annular air guide tube in the air cavity between the outer card tube and the inner card tube; S4. The formed pipe enters the annular treatment box, and at the same time, the flowing airflow enters the interior of the annular treatment box, and the toxic waste gas squeezed out of the pipe is discharged into the filter box. The filter plate inside the filter box filters and discharges the waste gas, and at the same time, the formed pipe is squeezed out of the annular treatment box.

[0026] The working principle and beneficial effects of the present invention are: 1. In the present invention, the detachable inner clamp tube is conveniently replaced according to the requirements of the pipe specifications, and the mold replacement method is simple; while the cooling water flowing inside the spiral cooling tube is used to cool the extruded plastic pipe, the flowing airflow is used to drive the hot air flow in the air cavity between the outer clamp tube and the inner clamp tube to be discharged to accelerate the heat dissipation effect of the mold, thereby increasing the cooling and molding rate of the pipe. The flowing airflow blows the gas generated in the pipe production process into the filter box, and filters the exhaust gas through the filter element inside the filter plate, reducing the harm of the exhaust gas to the human body and the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0028] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the housing of the present invention; Figure 3 It is a structural schematic diagram of the outer clamping tube and the inner clamping tube of the present invention; Figure 4 It is a structural schematic diagram of the inner clamping tube and the forming rod of the present invention; Figure 5 This is a schematic diagram of the connection structure between the external clamp tube and the spiral cooling tube of the present invention; Figure 6 It is a structural schematic diagram of the annular processing box of the present invention; Figure 7 It is a side view of the present invention.

[0029] In the figure: 1. hot melt feeding pipe; 2. conduit; 3. first clamping plate; 4. extrusion molding assembly; 401. outer clamping tube; 402. inner clamping tube; 403. molding rod; 404. cooling chamber; 405. spiral cooling tube; 406. annular liquid guide tube; 407. liquid inlet pipe; 408. liquid outlet pipe; 409. annular air guide tube; 4010. air inlet pipe; 4011. air outlet pipe; 5. outer shell; 6. second clamping plate; 7. fastening bolts; 8. annular processing box; 9. connecting pipe; 10. connecting pipe; 11. filter box; 12. filter plate; 13. mixing feeding pipe; 14. feed hopper. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0031] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0032] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0034] Example 1 Reference Figure 1 to Figure 7, which is the first embodiment of the present invention, proposes an extrusion molding device for plastic pipe processing, including a hot melt feeding pipe 1, the outer end of the hot melt feeding pipe 1 is fixedly connected to a conduit 2, the outer end of the conduit 2 is fixedly connected to a first clamping plate 3, and the inner side of the first clamping plate 3 is provided with an extrusion molding component 4; the extrusion molding component 4 includes an outer clamping pipe 401 clamped to the inner side of the first clamping plate 3, the inner side of the outer clamping pipe 401 is clamped to an inner clamping pipe 402, the inner side of the inner clamping pipe 402 is fixedly connected to a molding rod 403, the inner clamping pipe 402 is connected to the conduit 2, and the outer clamping pipe 40 1 is provided with a cooling cavity 404 on the inner wall of the front end, a spiral cooling tube 405 is fixedly connected to the interior of the cooling cavity 404, an annular liquid guide tube 406 is fixedly connected to the outer end of the outer clamp tube 401, the conduit 2 and the outer clamp tube 401 are provided with six groups and the positions correspond, two annular liquid guide tubes 406 are provided and are arranged at the outer ends of the six groups of outer clamp tubes 401, and the two annular liquid guide tubes 406 are respectively connected to the two ends of the spiral cooling tube 405, and the extrusion molding component 4 also includes a liquid inlet pipe 407 and a liquid outlet pipe 408 respectively fixedly connected to the outer ends of the two annular liquid guide tubes 406. The purpose of this arrangement is that during the production process of plastic pipes, the material is discharged into the conduit 2 through the hot melt feed pipe 1, the hot melt material enters the inner clamp tube 402, and is squeezed into a tube shape through the forming rod 403 inside it, and at the same time, cooling water enters the spiral cooling tube 405 in the cooling chamber 404 from the liquid inlet pipe 407, thereby cooling and forming the pipe located at the front end of the inner clamp tube 402, and the cooling water is then discharged through the liquid outlet pipe 408.

[0035] Optionally, a cavity is provided between the outer clamp tube 401 and the inner clamp tube 402, and the extrusion molding assembly 4 further comprises an annular air guide tube 409 symmetrically fixedly connected to the outer end of the outer clamp tube 401, the outer clamp tube 401 is connected to the annular air guide tube 409, and the top ends of the two annular air guide tubes 409 are respectively fixedly connected with an air inlet pipe 4010 and an air outlet pipe 4011. The purpose of this arrangement is that during the process of cooling and molding the pipe by the cooling water inside the spiral cooling tube 405, the cold gas enters the annular air guide tube 409 from the air inlet pipe 4010, and the air flow flows in the air cavity between the outer clamp tube 401 and the inner clamp tube 402, further enhancing the cooling and molding speed of the pipe, and the air flow is discharged from the air outlet pipe 4011.

[0036] Optionally, the inner side of the first clamping plate 3 is clamped with a shell 5, the side of the shell 5 away from the first clamping plate 3 is clamped with a second clamping plate 6, and a fastening bolt 7 is provided between the first clamping plate 3 and the second clamping plate 6. The purpose of this arrangement is that the shell 5 is provided to store and protect the outer clamping tube 401, and it is also convenient to disassemble it, so as to facilitate the replacement of the inner clamping tube 402 inside the outer shell tube 401, so as to be suitable for the production of pipes of different specifications.

[0037] Optionally, the liquid inlet pipe 407 and the liquid outlet pipe 408 are clamped at the side end of the housing 5, and the air inlet pipe 4010 and the air outlet pipe 4011 are symmetrically clamped at the top of the housing 5. The purpose of this arrangement is that the liquid inlet pipe 407, the liquid outlet pipe 408, the air inlet pipe 4010 and the air outlet pipe 4011 arranged at the outer end of the housing 5 are convenient for external pipes.

[0038] Optionally, the outer end of the second clamping plate 6 is fixedly connected to the annular processing box 8 and is in communication with the annular processing box 8, a cavity is provided inside the annular processing box 8, a connecting pipe 9 is fixedly connected to the top of the annular processing box 8, and a connecting pipe 10 is fixedly connected between the connecting pipe 9 and the air outlet pipe 4011. The purpose of this arrangement is that after the cooling airflow is discharged from the air outlet pipe 4011, it enters the interior of the annular processing box 8 through the connecting pipe 10, and the flowing airflow can drive the waste gas generated in the plastic hot melting process to move to the interior of the filter box 11.

[0039] Optionally, a filter box 11 is fixedly connected to the bottom end of the annular treatment box 8, the bottom end of the filter box 11 is connected to the outside, a filter plate 12 is symmetrically clamped inside the filter box 11, and a filter element is fixedly connected inside the filter plate 12. The purpose of this arrangement is that the filter element inside the filter plate 12 filters the exhausted exhaust gas, thereby reducing the harm caused by the exhaust gas to the human body and the environment.

[0040] Optionally, a mixing feeding pipe 13 is fixedly connected to the side end of the hot melt feeding pipe 1, and a feeding auger is provided inside the hot melt feeding pipe 1 and the mixing feeding pipe 13, and a feeding hopper 14 is fixedly connected to the top of the mixing feeding pipe 13, and two feeding hoppers 14 are provided and communicated with the mixing feeding pipe 13. The purpose of this arrangement is that the mixing feeding pipe 13 is used to evenly mix and stir a variety of plastic particles to improve the production quality of the pipe, and the feeding hopper 14 is provided to facilitate the addition of different types of plastic particles and additives.

[0041] Example 2 Reference Figure 1 to Figure 7 , which is the second embodiment of the present invention, and this embodiment is different from the first embodiment in that: Compared with Example 1, a further method for processing a plastic pipe comprises the following steps: S1. A variety of plastic particles and additives are added into the feed hopper 14 according to the addition ratio, and mixed through the feeding auger inside the mixing feed hopper 13; S2. The mixed plastic particles and additives enter the hot melt feeding tube 1 for hot melting, and the hot melted gel fluid enters the inner card tube 402 inside the outer card tube 401 from the conduit 2; S3. The extruded colloidal fluid is formed by the forming rod 403, and cooling water flows from the spiral cooling tube 405 to cool the pipe at the front end of the inner card tube 402, and the cooling air flows through the annular air guide tube 409 in the air cavity between the outer card tube 401 and the inner card tube 402; S4. The formed pipe enters the annular treatment box 8, and at the same time, the flowing airflow enters the inside of the annular treatment box 8, and the toxic waste gas brought out by the pipe is discharged into the filter box 11. The filter plate 12 inside the filter box 11 filters and discharges the waste gas, and at the same time, the formed pipe is squeezed out of the annular treatment box 8.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An extrusion molding device for plastic pipe processing, characterized in that: It comprises a hot melt feeding pipe (1), the outer end of the hot melt feeding pipe (1) is fixedly connected to a conduit (2), the outer end of the conduit (2) is fixedly connected to a first clamping plate (3), and the inner side of the first clamping plate (3) is provided with an extrusion molding component (4); The extrusion molding component (4) comprises an outer clamping tube (401) clamped to the inner side of the first clamping plate (3), an inner clamping tube (402) clamped inside the outer clamping tube (401), a molding rod (403) fixedly connected inside the inner clamping tube (402), the inner clamping tube (402) being communicated with the conduit (2), a cooling cavity (404) being provided on the inner wall at the front end of the outer clamping tube (401), a spiral cooling tube (405) fixedly connected inside the cooling cavity (404), and an annular liquid guide tube (406) fixedly connected to the outer end of the outer clamping tube (401).

2. The extrusion molding device for plastic pipe processing according to claim 1, characterized in that: The conduit (2) and the outer clamping tube (401) are each provided with six groups and are positioned correspondingly, the annular liquid guiding tubes (406) are provided with two and are arranged at the outer ends of the six groups of the outer clamping tubes (401), the two annular liquid guiding tubes (406) are respectively connected to the two ends of the spiral cooling tube (405), and the extrusion molding component (4) also includes a liquid inlet pipe (407) and a liquid outlet pipe (408) respectively fixedly connected to the outer ends of the two annular liquid guiding tubes (406).

3. The extrusion molding device for plastic pipe processing according to claim 2, characterized in that: A cavity is provided between the outer clamping tube (401) and the inner clamping tube (402), and the extrusion molding assembly (4) further comprises an annular air guide tube (409) symmetrically fixedly connected to the outer end of the outer clamping tube (401), the outer clamping tube (401) is connected to the annular air guide tube (409), and the top ends of the two annular air guide tubes (409) are respectively fixedly connected to an air inlet pipe (4010) and an air outlet pipe (4011).

4. The extrusion molding device for plastic pipe processing according to claim 3, characterized in that: The inner side of the first clamping plate (3) is clamped with a housing (5), the side of the housing (5) away from the first clamping plate (3) is clamped with a second clamping plate (6), and a fastening bolt (7) is provided between the first clamping plate (3) and the second clamping plate (6).

5. The extrusion molding device for plastic pipe processing according to claim 4, characterized in that: The liquid inlet pipe (407) and the liquid outlet pipe (408) are clamped to the side ends of the outer shell (5), and the air inlet pipe (4010) and the air outlet pipe (4011) are symmetrically clamped to the top end of the outer shell (5).

6. The extrusion molding device for plastic pipe processing according to claim 4, characterized in that: The outer end of the second clamping plate (6) is fixedly connected to an annular processing box (8) and is in communication with each other. A cavity is provided inside the annular processing box (8). A connecting pipe (9) is fixedly connected to the top of the annular processing box (8). A connecting pipe (10) is fixedly connected between the connecting pipe (9) and the air outlet pipe (4011).

7. An extrusion molding device for plastic pipe processing according to claim 6, characterized in that: The bottom end of the annular treatment box (8) is fixedly connected to a filter box (11), the bottom end of the filter box (11) is in communication with the outside, a filter plate (12) is symmetrically clamped inside the filter box (11), and a filter element is fixedly connected inside the filter plate (12).

8. An extrusion molding device for plastic pipe processing according to claim 7, characterized in that: The side end of the hot melt feeding pipe (1) is fixedly connected to a mixing feeding pipe (13), and a feeding augers are provided inside the hot melt feeding pipe (1) and the mixing feeding pipe (13). The top end of the mixing feeding pipe (13) is fixedly connected to a feeding hopper (14), and two feeding hoppers (14) are provided and communicated with the mixing feeding pipe (13).

9. A method for processing a plastic pipe according to claim 8, comprising the following steps: S1. Putting a plurality of plastic particles and additives into the feed hopper (14) according to the addition ratio, and mixing them through the feeding auger inside the mixing and feeding hopper (13); S2. The mixed plastic particles and additives enter the hot melt feeding tube (1) for hot melting, and the hot melted gel fluid enters the inner clamping tube (402) inside the outer clamping tube (401) from the conduit (2); S3. The extruded colloidal fluid is formed via the forming rod (403), and cooling water flows from the spiral cooling tube (405) to cool and form the tube located at the front end of the inner clamping tube (402), and cooling air flows in the air cavity between the outer clamping tube (401) and the inner clamping tube (402) via the annular air guide tube (409); S4. The formed pipe enters the annular treatment box (8), and at the same time, the flowing air enters the inside of the annular treatment box (8), and the toxic waste gas brought out by the pipe is discharged into the filter box (11). The filter plate (12) inside the filter box (11) filters and discharges the waste gas, and at the same time, the formed pipe is squeezed out of the annular treatment box (8).

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