Production device and production method of MPP double-wall corrugated pipe

Abstract

The invention relates to the technical field of double-wall corrugated pipes, and discloses an MPP double-wall corrugated pipe production device and a production method thereof.The MPP double-wall corrugated pipe production device comprises an extruding and forming machine, the forming machine comprises a driving mechanism and a plurality of forming modules, each forming module comprises two forming modules, and the two forming modules are spliced to form a corrugated pipe forming mold; the driving mechanism circularly drives the forming modules to be spliced or separated so as to continuously form the corrugated pipe. The forming module comprises a plurality of mold blocks, a forming surface is formed on each forming block, each mold block is sequentially arranged on the forming surface of another mold block in a sleeving manner according to the size relationship, and a preliminary connecting assembly and an extrusion positioning assembly are arranged between every two adjacent mold blocks; the primary connecting assembly is used for connecting the adjacent mold blocks, and the extrusion positioning assembly provides radial extrusion force when the adjacent forming modules are spliced.

Description

Technical Field

[0001] The invention relates to the technical field of double-wall corrugated pipes, and in particular to a production device and a production method for an MPP double-wall corrugated pipe. Background Art

[0002] MPP double-wall corrugated pipe is a special pipe with smooth inner wall, corrugated outer wall and hollow inner and outer walls, which is made of polypropylene as the main raw material and added with processing additives that are beneficial to the performance of the pipe. It is suitable for buried protection of power, cables and communication optical and cable, and has the characteristics of light weight, high strength and good flexibility. When the double-wall corrugated pipe is produced, the raw material of the double-wall corrugated pipe is extruded from the extruder, and then extruded and shaped by the die to form a ring structure on the outer wall of the double-wall corrugated pipe.

[0003] The production device of MMP double-wall corrugated pipe includes an extruder, an extrusion die, a corrugated pipe forming machine, a cooling water tank and a cutting machine. The raw materials are extruded by the extruder, enter the corrugated pipe forming machine after the extrusion die, and arrive at the cooling water tank for cooling after being formed by the corrugated pipe forming machine. Finally, they are cut by the cutting machine to obtain segmented MPP double-wall corrugated pipes. MPP double-wall corrugated pipes have different specifications and sizes, and the shapes of the annular protrusions on the corrugated pipes are also different. If different types of double-wall corrugated pipes are to be produced, a corrugated pipe forming machine of corresponding specifications is required. At present, a production device has been disclosed in the prior art, in which the molds are sequentially set and connected according to the size, and the mold blocks can be replaced when used. However, in actual applications, since the mold is divided into several blocks, the installation will bring about the problem of installation accuracy. When the installation accuracy is not enough, there will be gaps between the molds, resulting in flash on the products produced. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a production device and a production method for an MPP double-wall corrugated pipe, aiming to solve the problems existing in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A production device for an MPP double-wall corrugated pipe comprises an extruder and a molding machine, wherein the molding machine comprises a driving mechanism and a plurality of molding modules, each molding module comprises two molding modules, and the two molding modules are assembled to form a molding die for the corrugated pipe, and the driving mechanism cyclically drives the assembly molding modules to assemble or separate from each other to continuously mold the corrugated pipe;

[0007] The molding module includes a plurality of mold blocks, each of which is formed with a molding surface, and each of the mold blocks is sequentially sleeved on the molding surface of another mold block according to the size relationship, and a preliminary connection component and an extrusion positioning component are arranged between adjacent mold blocks;

[0008] The preliminary connection assembly is used to connect adjacent mold blocks, and the extrusion positioning assembly provides radial extrusion force when adjacent molding modules are assembled together.

[0009] Furthermore, the preliminary connection assembly includes a resistance rod and a slider, the resistance rod is threadedly connected to the mold block, a first slide groove is opened on the mold block, the first slide groove is connected to the molding surface, the slider is slidably installed in the slide groove, and the slider can close the slide groove, when the resistance rod rotates, the end of the resistance rod resists the slider and pushes the slider to slide in the first direction into the connecting groove of the adjacent mold block, the connecting groove can accommodate the adjacent slider to slide in the second direction, and the second direction is perpendicular to the axial direction of the resistance rod and the first direction, and the position of the first slide groove is adapted to the position of the connecting groove.

[0010] Furthermore, the extrusion positioning assembly includes two arc-shaped elastic sheets, which are installed in the connecting grooves. The elastic sheets are relatively arranged and squeeze the slider. When the slider squeezes one of the elastic sheets, the elastic sheets can be relatively deformed to allow the slide groove to slide in a direction close to the corresponding elastic sheet.

[0011] Furthermore, a tension spring is connected between the slider and the first slide groove, and the tension spring is used to provide an elastic force for the slider to slide into the first slide groove.

[0012] A method for producing an MPP double-wall corrugated pipe, characterized in that: a production device for an MPP double-wall corrugated pipe is provided, comprising an extruder and a molding machine, wherein the molding machine comprises a driving mechanism and a plurality of component molding modules, each of which comprises two molding modules, and the two molding modules are assembled to form a molding die for the corrugated pipe, and the driving mechanism cyclically drives the component molding modules to assemble or separate from each other to continuously mold the corrugated pipe;

[0013] The molding module includes a plurality of mold blocks, each of which is formed with a molding surface, and each of the mold blocks is sequentially sleeved on the molding surface of another mold block according to the size relationship, and a preliminary connection component and an extrusion positioning component are arranged between adjacent mold blocks;

[0014] The preliminary connection assembly is used to connect adjacent mold blocks, and the extrusion positioning assembly provides radial extrusion force when adjacent molding modules are assembled together.

[0015] The production method comprises the following steps:

[0016] S1. Select the mold block of corresponding size according to the shape of MPP double-wall corrugated pipe in advance, and pre-install it using the preliminary connection assembly;

[0017] S2. The installed mold block rotates in a driving cycle along with the driving mechanism. When it rotates to the molding position, the adjacent previous molding module squeezes the mold block of the current molding module so that the mold block automatically moves and positions along the second direction.

[0018] Furthermore, the production method is provided with a pressure verification step, which is performed after step S2, and comprises:

[0019] The pressure sensor installed on the forming module continuously monitors the surface extrusion pressure, which reflects the force between two adjacent forming modules.

[0020] Determine whether the surface extrusion pressure has pressure abnormality, and the pressure abnormality includes pressure mutation, excessive pressure or too low pressure. When pressure abnormality is detected, record the abnormal content and the corresponding defects.

[0021] Furthermore, the production method is configured with a production status scoring strategy, which includes obtaining the average of production speed, material extrusion temperature, and surface extrusion pressure and calculating the production status score according to a preset scoring model. The production status score reflects the quality of the currently produced corrugated pipe, and the quality of the currently produced corrugated pipe is positively correlated with the production status score. When the calculated production status score does not reach the preset scoring threshold, a parameter adjustment suggestion is generated.

[0022] Furthermore, the pressure verification step also includes randomly obtaining the surface extrusion pressure at different parts to determine whether the surface extrusion pressure meets the pipeline production pressure conditions. If not, the pressure abnormality is recorded. The pipeline production pressure conditions are specifically that the surface extrusion pressure tends to decrease along the direction of production material transmission.

[0023] Beneficial effects of the present invention:

[0024] 1. The present invention connects several mold blocks through a preliminary connection component, which is convenient for connection. After the mold blocks are generated, they can be installed or replaced without disassembling the entire molding module, which is convenient for operation. After the preliminary connection is completed, the extrusion positioning component is used to enable the mold blocks to slide relative to each other. By utilizing the characteristics of the production device, when molding, each molding module needs to be arranged and assembled in sequence. Therefore, this characteristic is used to automatically adjust the position and assemble the mold blocks to eliminate the errors caused by the installation. While the positioning effect is good, the generation of defects such as flash is also reduced;

[0025] 2. The present invention sets a pressure verification step and monitors the surface extrusion pressure to determine whether a connection error occurs, whether a pressure mutation, excessive pressure or insufficient pressure occurs, and combines actual abnormal conditions to assist in determining the quality of the current molding, with a high degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the molding module;

[0028] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0029] Figure 4 is a cross-sectional view of the molding module from another perspective;

[0030] Figure 5 for Figure 4 A partial enlarged schematic diagram of point B in the middle;

[0031] Reference numerals:

[0032] 1. Forming module; 2. Driving mechanism; 3. Double-walled corrugated pipe; 4. Mold block; 401. First slide groove; 402. Connecting groove; 41. Resistance rod; 42. Sliding block; 43. Tension spring; 5. Elastic sheet. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The same parts are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "bottom surface" and "top surface", "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0034] A production device for an MPP double-wall corrugated pipe 3, such as Figure 1-5 As shown, it includes an extruder (not shown in the figure) and a molding machine, the molding machine includes a driving mechanism 2 and a plurality of component molding modules, each of which includes two molding modules 1, and the two molding modules 1 are assembled together to form a molding die for the corrugated pipe, and the driving mechanism 2 cyclically drives the component molding modules to assemble or separate from each other to continuously mold the corrugated pipe;

[0035] The molding module 1 includes a plurality of mold blocks 4, each of which is formed with a molding surface, and each of the mold blocks 4 is sequentially sleeved on the molding surface of another mold block 4 according to the size relationship, and a preliminary connection component and an extrusion positioning component are arranged between adjacent mold blocks 4;

[0036] The preliminary connection assembly is used to connect adjacent mold blocks 4, and the extrusion positioning assembly provides radial extrusion force when adjacent molding modules 1 are assembled with each other.

[0037] Furthermore, the preliminary connection assembly includes a resistance rod 41 and a slider 42, the resistance rod 41 is threadedly connected to the mold block 4, a first slide groove 401 is provided on the mold block 4, the first slide groove 401 is connected to the molding surface, the slider 42 is slidably installed in the slide groove, and the slider 42 can close the slide groove, when the resistance rod 41 rotates, the end of the resistance rod 41 abuts against the slider 42 and pushes the slider 42 to slide in the first direction into the connecting groove 402 of the adjacent mold block 4, the connecting groove 402 can accommodate the adjacent slider 42 to slide in the second direction, and the second direction is perpendicular to the axial direction of the resistance rod 41 and the first direction, and the position of the first slide groove 401 is adapted to the position of the connecting groove 402.

[0038] Furthermore, the extrusion positioning assembly includes two arc-shaped elastic sheets 5, which are installed in the connecting groove 402. The elastic sheets 5 are relatively arranged and squeeze the slider 42. When the slider 42 squeezes one of the elastic sheets 5, the elastic sheets 5 can be relatively deformed to allow the slide groove to slide in a direction close to the corresponding elastic sheet 5.

[0039] Furthermore, a tension spring 43 is connected between the slider 42 and the first slide groove 401 , and the tension spring 43 is used to provide an elastic force for the slider 42 to slide into the first slide groove 401 .

[0040] A method for producing an MPP double-wall corrugated pipe 3, characterized in that: a production device for an MPP double-wall corrugated pipe 3 is provided, comprising an extruder and a molding machine, wherein the molding machine comprises a driving mechanism 2 and a plurality of component molding modules, each of which comprises two molding modules 1, and the two molding modules 1 are assembled to form a molding die for the corrugated pipe, and the driving mechanism 2 cyclically drives the component molding modules to assemble or separate from each other to continuously mold the corrugated pipe;

[0041] The molding module 1 includes a plurality of mold blocks 4, each of which is formed with a molding surface, and each of the mold blocks 4 is sequentially sleeved on the molding surface of another mold block 4 according to the size relationship, and a preliminary connection component and an extrusion positioning component are arranged between adjacent mold blocks 4;

[0042] The preliminary connection assembly is used to connect adjacent mold blocks 4, and the extrusion positioning assembly provides radial extrusion force when adjacent molding modules 1 are assembled with each other.

[0043] The production method comprises the following steps:

[0044] S1. Select a mold block 4 of corresponding size according to the shape of the MPP double-wall corrugated pipe 3 in advance, and pre-install it using a preliminary connection assembly;

[0045] S2. The installed mold block 4 rotates in a driving cycle along with the driving mechanism 2. When it rotates to the molding position, the adjacent previous molding module squeezes the mold block 4 of the current molding module so that the mold block 4 automatically moves and positions along the second direction.

[0046] The production method is provided with a pressure verification step, which is performed after step S2, and the pressure verification step includes:

[0047] The pressure sensor installed on the forming module 1 continuously monitors the surface extrusion pressure, which reflects the force between two adjacent forming modules 1.

[0048] Determine whether the surface extrusion pressure has pressure abnormality, and the pressure abnormality includes pressure mutation, excessive pressure or too low pressure. When pressure abnormality is detected, record the abnormal content and the corresponding defects.

[0049] The pressure verification step also includes randomly obtaining the surface extrusion pressure at different parts, judging whether the surface extrusion pressure meets the pipeline production pressure condition, and recording the pressure abnormality if it does not meet the condition. The pipeline production pressure condition is specifically that the surface extrusion pressure tends to decrease along the direction of production material transmission.

[0050] The production method is configured with a production status scoring strategy, which includes obtaining the average values ​​of production speed, material extrusion temperature, material extrusion pressure, tube wall thickness, tube diameter, and surface extrusion pressure and calculating the production status score according to a preset scoring model. The production status score reflects the quality of the currently produced corrugated tube, and the quality of the currently produced corrugated tube is positively correlated with the production status score. When the calculated production status score does not reach the preset scoring threshold, a parameter adjustment suggestion is generated.

[0051] Working principle:

[0052] Each group of molding modules includes two molding modules 1, and the two molding modules 1 are assembled together to form a molding mold for the corrugated pipe. As the driving mechanism of the multiple molding modules runs, the sides of the molding modules need to contact and assemble with each other so that the molding surfaces are continuously connected. However, this structural setting requires high precision in the relative positions between the multiple mold blocks. If the installation position of one of the mold blocks is offset, defects such as flash will be generated at the changed position, which also results in a long installation time. In the present application, an extrusion positioning component is added to provide radial extrusion force when adjacent molding modules 1 are assembled together, thereby making the molding surface continuous.

[0053] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A production device for MPP double-wall corrugation, characterized in that: The invention comprises an extruder and a molding machine, wherein the molding machine comprises a driving mechanism (2) and a plurality of molding modules, each molding module comprises two molding modules (1), the two molding modules (1) are assembled together to form a molding die for a corrugated pipe, and the driving mechanism (2) cyclically drives the assembly molding modules to assemble together or separate from each other to continuously mold the corrugated pipe; The molding module (1) comprises a plurality of mold blocks (4), each of which is formed with a molding surface, each of which is sequentially sleeved on the molding surface of another mold block (4) according to a size relationship, and a preliminary connection component and an extrusion positioning component are provided between adjacent mold blocks (4); The preliminary connection assembly is used to connect adjacent mold blocks (4), and the extrusion positioning assembly provides radial extrusion force when adjacent molding modules (1) are assembled together.

2. The MPP double-wall corrugated production device according to claim 1, characterized in that: The preliminary connection assembly comprises a resisting rod (41) and a sliding block (42), wherein the resisting rod (41) is threadedly connected to the mold block (4), and a first sliding groove (401) is provided on the mold block (4), wherein the first sliding groove (401) is communicated with the molding surface, and the sliding block (42) is slidably installed in the sliding groove, and the sliding block (42) can close the sliding groove, and when the resisting rod (41) rotates, the end of the resisting rod (41) resists the sliding block (42) and pushes the sliding block (42) to slide in a first direction into a connecting groove (402) of an adjacent mold block (4), and the connecting groove (402) can accommodate the adjacent sliding block (42) to slide in a second direction, and the second direction is perpendicular to the axial direction of the resisting rod (41) and the first direction, and the position of the first sliding groove (401) is adapted to the position of the connecting groove (402).

3. The production device of MPP double-wall corrugation according to claim 1, characterized in that: The extrusion positioning assembly comprises two arc-shaped elastic sheets (5), the elastic sheets (5) being installed in the connecting groove (402), the elastic sheets (5) being arranged opposite to each other and extruding the sliding block (42), and when the sliding block (42) extrudes one of the elastic sheets (5), the elastic sheets (5) can be relatively deformed so that the sliding groove can slide in a direction close to the corresponding elastic sheet (5).

4. The production device of the MPP double-wall corrugated pipe according to claim 1, characterized in that: A tension spring (43) is connected between the slider (42) and the first slide groove (401), and the tension spring (43) is used to provide an elastic force for the slider (42) to slide into the first slide groove (401).

5. A method for producing MPP double-wall corrugations, characterized in that: Provided is a production device for an MPP double-wall corrugated pipe (3), comprising an extruder and a molding machine, wherein the molding machine comprises a driving mechanism (2) and a plurality of component molding modules, each component molding module comprises two molding modules (1), the two molding modules (1) are assembled together to form a molding die for the corrugated pipe, and the driving mechanism (2) cyclically drives the component molding modules to assemble together or separate from each other to continuously mold the corrugated pipe; The molding module (1) comprises a plurality of mold blocks (4), each of which is formed with a molding surface, each of which is sequentially sleeved on the molding surface of another mold block (4) according to a size relationship, and a preliminary connection component and an extrusion positioning component are provided between adjacent mold blocks (4); The preliminary connection assembly is used to connect adjacent mold blocks (4), and the extrusion positioning assembly provides radial extrusion force when adjacent molding modules (1) are assembled together. The production method comprises the following steps: S1. Selecting a mold block (4) of corresponding size according to the shape of the MPP double-wall corrugated pipe (3) in advance, and pre-installing it using a preliminary connection assembly; S2. The installed mold block (4) rotates in a driving cycle along with the driving mechanism (2). When it rotates to the molding position, the adjacent previous molding module group squeezes the mold block (4) of the current molding module group so that the mold block (4) automatically moves and positions along the second direction.

6. The method for producing MPP double-wall corrugations according to claim 5, characterized in that: The production method is provided with a pressure verification step, which is performed after step S2, and the pressure verification step includes: The pressure sensor installed on the forming module (1) continuously monitors the surface extrusion pressure, and the surface extrusion pressure reflects the force between two adjacent forming modules (1). Determine whether the surface extrusion pressure has pressure abnormality, and the pressure abnormality includes pressure mutation, excessive pressure or too low pressure. When pressure abnormality is detected, record the abnormal content and the corresponding defects.

7. The method for producing an MPP double-wall corrugated pipe according to claim 6, characterized in that: The pressure verification step also includes randomly obtaining the surface extrusion pressure at different parts, judging whether the surface extrusion pressure meets the pipeline production pressure condition, and recording the pressure abnormality if it does not meet the condition. The pipeline production pressure condition is specifically that the surface extrusion pressure tends to decrease along the direction of production material transmission.

8. The method for producing an MPP double-wall corrugated pipe according to claim 5, characterized in that: The production method is configured with a production status scoring strategy, which includes obtaining the average values ​​of production speed, material extrusion temperature, material extrusion pressure, tube wall thickness, tube diameter, and surface extrusion pressure and calculating the production status score according to a preset scoring model. The production status score reflects the quality of the currently produced corrugated tube, and the quality of the currently produced corrugated tube is positively correlated with the production status score. When the calculated production status score does not reach the preset scoring threshold, a parameter adjustment suggestion is generated.

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