CN115972554B - Production line of wide fiber web reinforced plastic composite pipe - Google Patents
Production line of wide fiber web reinforced plastic composite pipe Download PDFInfo
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- CN115972554B CN115972554B CN202310155712.XA CN202310155712A CN115972554B CN 115972554 B CN115972554 B CN 115972554B CN 202310155712 A CN202310155712 A CN 202310155712A CN 115972554 B CN115972554 B CN 115972554B
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- 239000000835 fiber Substances 0.000 title claims abstract description 116
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 78
- 239000002131 composite material Substances 0.000 title claims abstract description 54
- 239000002990 reinforced plastic Substances 0.000 title claims abstract description 11
- 239000002985 plastic film Substances 0.000 claims abstract description 121
- 238000001125 extrusion Methods 0.000 claims abstract description 61
- 238000010438 heat treatment Methods 0.000 claims abstract description 55
- 238000004804 winding Methods 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 32
- 229920003023 plastic Polymers 0.000 claims description 21
- 239000004033 plastic Substances 0.000 claims description 21
- 238000013329 compounding Methods 0.000 claims description 11
- 229920001169 thermoplastic Polymers 0.000 claims description 11
- 239000004416 thermosoftening plastic Substances 0.000 claims description 11
- 238000005520 cutting process Methods 0.000 claims description 7
- 238000010276 construction Methods 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 4
- 229920002430 Fibre-reinforced plastic Polymers 0.000 abstract description 3
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- 239000010410 layer Substances 0.000 description 73
- 239000004698 Polyethylene Substances 0.000 description 15
- -1 polyethylene Polymers 0.000 description 15
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- 238000000034 method Methods 0.000 description 10
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- 230000003014 reinforcing effect Effects 0.000 description 6
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
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- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
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- 241001391944 Commicarpus scandens Species 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
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- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
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- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
The application provides a production line of a wide fiber web reinforced plastic composite pipe, which comprises a wide plastic sheet extrusion device, a wide fiber web coiled material release device, an extrusion conveying device, a core mold driving device, a forming press roll device and a heating device; the pipe production line thoroughly changes the traditional production mode of producing fiber reinforced plastic composite pipes, adopts the production mode of zero-degree whole-piece winding and cladding of the wide fiber net composite sheet, and improves the production efficiency; the pipe production line can use fiber net sheets with longitudinal and transverse fibers, and the produced pipe has improved performances in three aspects of radial, axial and ring stiffness; the fiber net sheet material with longitudinal and transverse fibers is matched, and the same quality raw materials are used, so that the pipe with higher pressure grade and higher quality can be manufactured, the material and production cost can be reduced, and the rapid production and rapid construction of the large-caliber pipe can be ensured.
Description
Technical Field
The application relates to the technical field of plastic composite pipe production lines, in particular to a wide fiber web reinforced plastic composite pipe production line.
Background
The manufacturing of the existing large-caliber thermoplastic glass fiber reinforced polyethylene sheet material winding forming pressure pipe material is generally completed by adopting a sectional manufacturing method, a fixed-length round roller is firstly adopted as a pipe core mold, different layers of plastic and unidirectional glass fiber reinforced sheet materials are spirally wound on the outer wall of the core mold from inside to outside in a forward and reverse mode, a four-layer structure comprising a cohesive ethylene layer, a middle pressure-bearing thermoplastic glass fiber reinforced polyethylene layer, a polyethylene outer protective layer and a ring stiffness ripple winding layer is gradually formed, and all the four-layer structure adopts a layered spiral winding forming process, namely a small extruder and a narrow single-layer fiber sheet material are adopted to produce the large-caliber pipe material.
For the polyethylene layer, a hot-melt plastic belt with the width not more than 600 mm is extruded by an extruder, continuously overlapped and wound on the outer wall of a pipe core die, and rolled and flattened by a compression roller along a spiral overlapped seam to form an inner-layer polyethylene spiral pipe; for the middle pressure-bearing thermoplastic glass fiber reinforced polyethylene layer, continuously spirally laminating and winding the narrow thermoplastic unidirectional glass fiber reinforced belt with the width of not more than 800 mm in forward and reverse directions, after one layer of spiral winding is completed, spirally winding the second layer in reverse directions, and spirally winding unidirectional glass fiber belts with different layers in forward and reverse directions according to the designed pressure requirement until the number of the layers of the glass fibers reaches the designed number of the layers; extruding a narrow hot-melt polyethylene belt from an extruder for the polyethylene outer protective layer of the third layer, continuously spirally laminating and winding the narrow hot-melt polyethylene belt on the outer wall of the second pressure-bearing layer, and flattening the narrow hot-melt polyethylene belt along a spiral lamination seam by using a compression roller to form the polyethylene protective layer spirally wound on the outer layer; the last layer is a spiral wound bellows stud. After the four layers are wound, cooling, shaping and demoulding are carried out to manufacture a section of large-caliber thermoplastic glass fiber reinforced polyethylene pressure pipe.
The existing production process has extremely low production efficiency, the whole round core mold needs to be heated in the production process, each layer of material is spirally wound and compounded, the whole production line needs to be continuously heated, and the heating electricity consumption is high; each layer of the pipe is formed by adopting a radial oblique angle spiral winding process, no axial parallel fiber exists, no circumferential parallel fiber exists, the pipe only bears internal radial pressure, and the manufactured pressure pipe is weak in axial tensile resistance, low in pressure resistance, easy to break and the like; in addition, the existing production process cannot produce the pressure pipe with the sealing ring faucet at one time, and the sealing ring groove needs to be machined by secondary turning and milling. Because the spiral winding process takes too long time and has high rejection rate, at home and abroad, almost no equipment for manufacturing polyethylene pressure pipes with diameters exceeding three meters and working pressures exceeding 1.0Mpa exists at present.
Disclosure of Invention
Therefore, the technical problem to be solved by the application is to overcome the technical defects of extremely low production efficiency, high energy consumption and weak axial tension resistance of the produced pipe in the production line for producing the thermoplastic glass fiber reinforced polyethylene pipe in the prior art, so as to provide the production line for the wide fiber net reinforced plastic composite pipe, which has high production efficiency, low energy consumption, strong axial tension resistance of the produced pipe and higher radial bearing.
To this end, the application provides a production line of wide fiber web reinforced plastic composite pipes, comprising:
a wide plastic sheet extrusion device for extruding a wide plastic sheet;
a wide web roll release device arranged downstream of the wide plastic sheet extrusion device and used for temporarily storing and releasing wide web sheets placed in rolls;
at least one group of extrusion conveying devices, which are arranged at the downstream of the broad plastic sheet extrusion device and/or the broad fiber web coiled material releasing device, and are used for receiving and conveying the broad plastic sheets; or for receiving and transporting the wide web sheet; or a composite layer for receiving and transporting the wide plastic sheet and the wide web sheet;
a mandrel disposed downstream of the extrusion conveyor, comprising a mandrel body having a first outer cylindrical surface for winding the wide plastic sheet, or for winding the wide web sheet, or for winding a composite layer of the wide plastic sheet and the wide web sheet;
the mandrel driving device is used for driving the mandrel to rotate;
the forming press roll device is at least one group and is axially arranged in parallel with the core die and is used for extruding and compositing the wide plastic sheet on the outer cylindrical surface of the core die; or the wide fiber web sheet is used for extrusion compounding to the outer cylindrical surface of the core mold; or extruding and compositing the composite layer of the wide plastic sheet and the wide fiber web sheet to the outer cylindrical surface of the core mold;
a heating device arranged between the core mold and the extrusion conveying device;
for heating the surface of the rotating mandrel;
and/or heating an upper surface of the wide plastic sheet that has not been wound around the core mold; or heating the upper surface of the wide web sheet that has not been wound around the mandrel; or heating the upper surface of the composite layer of the broad plastic sheet and the broad fiber web sheet which are not wound on the mandrel;
and/or heating an outer surface of the wide plastic sheet which has been wound on an outer circumferential surface of the core mold; or heating the outer surface of the wide web sheet that has been wound on the outer circumferential surface of the core; or heating the outer surface of the composite layer of the broad width plastic sheet and the broad width fiber net sheet which is wound on the outer circumferential surface of the core mold.
As a preferred embodiment, the broad width plastic sheet extrusion device comprises at least one plastic extruder, and a broad width sheet die connected with the plastic extruder.
As a preferable mode, when the broad plastic sheet extruding device and the broad fiber web coiled material releasing device are simultaneously operated, the broad plastic sheet extruded by the broad plastic sheet extruding device is positioned above the broad fiber web sheet released by the broad fiber web coiled material releasing device.
As a preferred solution, the mandrel further comprises a socket section having one or two, disposed at one or both ends of the mandrel body, having a second outer cylindrical surface, the diameter of the second outer cylindrical surface being larger than the diameter of the first outer cylindrical surface of the mandrel body, for winding the broad plastic sheet, the axial fiber layer of the broad web sheet, or the composite layer of the broad plastic sheet and the axial fiber layer of the broad web sheet.
As a preferred solution, it further comprises at least one ring groove protruding ring movably placed on the outer cylindrical surface of the socket section.
As a preferred aspect, the forming press roll apparatus is installed by a parallel moving type driving structure such that an outer circumferential surface of the forming press roll apparatus is in parallel contact with an outer circumferential surface of the core mold, the parallel moving type driving structure comprising:
the fixing plates are arranged in a pair and are oppositely arranged;
the strip-shaped sliding grooves are symmetrically arranged on the fixed plate;
the sliding bearing seat is movably arranged in the strip-shaped sliding groove;
shafts at two ends of the forming press roll device are respectively arranged in bearing inner holes in the corresponding sliding bearing seats;
the two cylinders or the two oil cylinders are respectively and fixedly arranged on the fixed plate, and the top end of an output shaft of each cylinder or each oil cylinder is connected with the sliding bearing seat.
As a preferable mode, the fixing plate can be moved in parallel back and forth in a direction approaching or separating from the core mold.
As a preferable mode, the heating device is arranged at a position where the wide plastic sheet is connected with the core mould at a certain angle; or the wide web sheet is connected with the core mould at a certain angle; or the position where the composite layer of the broad plastic sheet and the broad fiber net sheet is connected with the mandrel at a certain angle comprises a first heating panel and a second heating panel, wherein the first heating panel is arranged towards the outer cylindrical surface of the mandrel, and the second heating panel is arranged towards the upper surface of the broad plastic sheet; or toward the upper surface of the wide web sheet; or towards or against the upper surface of the composite layer of the broad width plastic sheet and the broad width web sheet.
As a preferable mode, the heating device is an infrared heating device.
As a preferable mode, the extrusion conveying device further comprises a cutting device which is arranged at the downstream of the extrusion conveying device;
and/or, the device also comprises a transverse cutter which is arranged at the outlet of the sheet mould of the broad plastic sheet extrusion device.
The technical scheme provided by the application has the following advantages:
the production line of the pipe is completely different from the production process of the existing production line, the production mode of producing the fiber reinforced plastic composite pipe by the traditional spiral winding is thoroughly changed, the production mode of winding unidirectional glass fiber belts in a reciprocating spiral way is not adopted, and the whole piece of wide zero-degree winding is adopted, so that the production efficiency is greatly improved, the composite pipe with the pipe diameter of 3 meters is produced in the same way, and compared with the traditional production line, the production efficiency of the production line is improved by more than 40 times.
In addition, the pipe production line disclosed by the application is coated by using the wide fiber net plastic composite sheet with longitudinal and transverse fibers, the direction of the transverse fibers is consistent with the length direction of the pipe, the longitudinal fibers are wrapped and wound around the circumference of the pipe, and the pipe produced by using the fiber net structure has improved performances in three aspects of radial, axial and ring stiffness; that is, compared with the existing production line and production process, the equipment provided by the application is matched with the wide fiber web sheet with longitudinal and transverse fibers, and the same quality raw materials are used, so that the pipe with higher pressure grade and higher quality can be manufactured, the material and production cost can be reduced, and the rapid production and rapid construction of the large-caliber pipe can be ensured.
Drawings
In order to more clearly illustrate the technical solutions in the prior art or in the embodiments of the present application, the following brief description is given of the drawings used in the description of the prior art or the embodiments.
FIG. 1 is a front view of a wide web reinforced plastic composite tubing production line of the present application.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a schematic view of a structure in which a molding roll apparatus is extruded in cooperation with a first core mold.
Fig. 4 is a schematic view of a structure in which a forming roll apparatus is extruded in cooperation with a second core mold.
Fig. 5 is a schematic structural view of a forming press roll device and a second core mold with a seal ring groove and a convex ring in a matched extrusion mode.
Reference numerals: 1. a wide plastic sheet extrusion device; 11. a wide plastic sheet; 12. a wide sheet mold; 13. a plastic extruder; 2. a wide web material release device; 21. a wide web sheet; 3. an extrusion conveyor; 4. a core mold; 41. a core mold main body; 42. a socket section; 43. the seal ring groove protrudes into the circular ring; 5. a mandrel driving device; 6. forming a press roll device; 61. a fixing plate; 62. a long strip-shaped sliding groove; 63. a sliding bearing seat; 64. forming press rolls; 65. a cylinder; 7. a heating device; 71. a first heating panel; 72. a second heating panel; 8. cutting device; 9. and a transverse cutter.
Detailed Description
In order that those skilled in the art will better understand the present solution, a technical solution according to an embodiment of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiment is only a part of the embodiment of the present application, not all of the embodiment. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, shall fall within the scope of the application.
It should be noted that the terms "first," "second," and the like in the claims and description herein are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to those steps or elements that are expressly listed or inherent to such process, method, article, or apparatus.
In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present application can be understood by those skilled in the art according to the specific circumstances. In addition, the term "plurality" shall mean two as well as more than two. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
The application will be described in detail below with reference to the drawings in connection with embodiments.
The embodiment provides a production line of a wide-width fiber-net reinforced plastic composite pipe, which comprises a wide-width plastic sheet extrusion device 1, a wide-width fiber-net coiled material release device 2, an extrusion conveying device 3, a core mold 4, a core mold driving device 5, a forming press roller device 6 and a heating device 7 as shown in figures 1-3.
Wherein: the wide plastic sheet extrusion apparatus 1 is provided at the initial position, which can directly receive the plastic raw material, and extrude the molten wide plastic sheet 11, the width of the extruded molten wide plastic sheet 11 being close to or slightly smaller than the length of the core mold 4.
A wide web roll release device 2 is provided downstream of the wide plastic sheet extrusion device 1 for temporarily storing and releasing the wide web sheet 21 placed in a roll; the wide web sheet 21 is a thermoplastic fiber composite sheet including longitudinal fibers and transverse fibers. The wide cross web roll (i.e., rolled wide web sheet 21) is pre-formed and comprises longitudinal fibers, transverse fibers, and a thermoplastic that thermally melt bonds the longitudinal and transverse fibers together and forms a sheet. The wide cross web has two types, one type in which the longitudinal fibers and the transverse fibers are uniformly and perpendicularly crossed, and the other type in which only the longitudinal fibers and the transverse fibers are uniformly and perpendicularly crossed in the main body portion, only the transverse fibers are present in the side portion and no longitudinal fibers are present in the side portion (either one or both side edges), and the main body portion and the side portion each comprise a sheet-forming thermoplastic.
The extrusion conveyor 3 is arranged downstream of the wide web roll release device 2 or downstream of the wide plastic sheet extrusion device 1; whether the wide web sheet 21 released by the wide web roll releasing device 2, the wide plastic sheet 11 extruded by the wide plastic sheet extruding device 1, or the composite layer of the wide plastic sheet 11 and the wide web sheet 21 can be conveyed downstream by the extrusion conveying device 3; the extrusion conveyor 3 may be of conventional twin roll or triple roll construction.
The mandrel 4 is an inner supporting mould for producing the composite pipe, the structure of the mandrel is a prior known diameter-reduced round mandrel, the mandrel is assembled to form a cylinder, a plurality of plastic layers and reinforcing fiber net layers are wound on the outer wall of the cylinder, and after natural cooling, the mandrel 4 is withdrawn after diameter reduction, thus forming the wound composite pipe. The mandrel 4 is disposed downstream of the extrusion conveyor 3 and includes a mandrel body 41, and an outer wall of the mandrel body 41 is a flat cylindrical surface for winding the wide plastic sheet 11, or for winding the wide web sheet 21, or for winding a composite layer of the wide plastic sheet 11 and the wide web sheet 21.
A core mold driving means 5 is provided below the core mold 4 for driving the core mold 4 to rotate. One possible implementation is: the mandrel 4 is provided with a mandrel shaft penetrating through the axial center of the mandrel shaft, two ends of the mandrel shaft are provided with first gears, the outside is provided with two second gears meshed with the first gears, and a driving device for driving one of the second gears to rotate, and the mandrel 4 can be driven to rotate by driving the second gears to rotate.
Forming press roller devices 6, at least one group of which is axially parallel to the core mold 4 and is used for extruding and compounding the wide plastic sheet 11 to the outer cylindrical surface of the core mold 4; or for extrusion compounding the wide web sheet 21 onto the outer cylindrical surface of the core die 4; or the composite layer of the wide plastic sheet 11 and the wide fiber web sheet 21 is extruded and compounded on the outer cylindrical surface of the mandrel 4.
A heating means 7 for heating the surface of the rotating core mold 4 is provided between the core mold 4 and the extrusion transfer means 3; alternatively, the upper surface of the wide plastic sheet 11 which has not been wound around the core mold 4 is heated, or the upper surface of the wide web sheet 21 which has not been wound around the core mold 4 is heated, or the upper surface of the composite layer of the wide plastic sheet 11 which has not been wound around the core mold 4 and the wide web sheet 21 is heated; alternatively, the outer surface of the wide plastic sheet 11 that has been wound around the core mold 4 is heated, the outer surface of the wide web sheet 21 that has been wound around the core mold 4 is heated, or the outer surface of a composite layer of the wide plastic sheet 11 and the wide web sheet 21 that has been wound around the core mold 4 is heated.
In the production line of the wide-width fiber-net reinforced plastic composite pipe in the embodiment, the manufactured coiled wide-width fiber-net sheet 21 containing longitudinal and transverse fibers is arranged on a wide-width fiber-net coiled material releasing device 2 in advance; after the equipment is started, the wide plastic sheet extrusion device 1 continuously extrudes a wide plastic sheet 11 with the width basically consistent with the length of the core mould 4, the wide plastic sheet 11 is contacted with the outer wall of the core mould 4 after being conveyed by the extrusion conveying device 3, the core mould 4 continuously rotates under the driving of the core mould driving device 5, the forming press roller device 6 extrudes and fixes the wide plastic sheet 11 on the outer wall of the core mould 4, the heating device 7 is arranged at a position close to the connection position of the core mould 4 and the wide plastic sheet 11, and simultaneously heats the surfaces to be bonded together of the core mould 4 and the wide plastic sheet 11, and the forming press roller device 6 extrudes and fixes the wide plastic sheet 11 on the outer wall of the core mould 4 along with the rotation of the core mould 4. According to actual requirements, at least one layer of wide plastic sheet 11 is adhered to the outer wall of the mandrel 4, so that the inner layer of the pipe is manufactured.
As a modification, the broad width plastic sheet extrusion device 1 is positioned above the broad width fiber web coiled material releasing device 2; when the wide plastic sheet extruding device 1 and the wide web roll releasing device 2 are simultaneously operated, the wide plastic sheet 11 extruded by the wide plastic sheet extruding device 1 is positioned above the wide web sheet 21 released by the wide web roll releasing device 2.
When the inner diameter of the pipe to be produced is large, sagging occurs due to gravity if the wide plastic sheet 11 is first separately press-fixed to the outer wall of the mandrel 4; the above improvement can be adopted at this time. After the equipment is started, the wide plastic sheet extrusion device 1 continuously extrudes wide plastic sheets 11 with the width basically consistent with the length of the mandrel 4, the wide fiber web coiled material release device 2 releases wide fiber web sheets 21, the specification and the form of the wide fiber web sheets 21 can be adjusted according to actual conditions, the wide fiber web sheets 21 are combined together, the wide fiber web sheets 21 support the wide plastic sheets 11 from the bottom, are contacted with the outer wall of the mandrel 4 after being conveyed by the extrusion conveying device 3, the mandrel 4 continuously rotates under the driving of the mandrel driving device 5, and the forming press roller device 6 extrudes and fixes the wide plastic sheets 11 supported by the wide fiber web sheets 21 on the outer wall of the mandrel 4 under the heating action of the heating device 7. Similarly, according to the actual requirement, at least one layer of composite layer of the wide plastic sheet 11 and the wide fiber web sheet 21 is adhered to the outer wall of the mandrel 4, so as to complete the manufacture of the inner layer of the pipe.
After the inner layer of the pipe is manufactured, the wide-width plastic sheet extrusion device 1 stops working, the wide-width fiber web coiled material release device 2 continues to release the wide-width fiber web sheet 21, the wide-width fiber web sheet 21 is conveyed by the extrusion conveying device 3, after being heated by the heating device 7, the wide-width fiber web sheet is continuously hot-melt compounded and wound on the outer wall of the fiber web existing in the core mold 4 under the extrusion action of the forming press roller device 6 until the thickness reaches the target requirement, and the manufacture of the second middle pressure-bearing thermoplastic fiber web reinforcing layer of the pipe is completed.
After the second layer is manufactured, the width of the plate die of the wide plastic sheet extrusion device 1 is adjusted to be equal to the length of the pressure-bearing section (the pipe main section or the pipe main section and the socket section) of the pipe fiber net, then the wide plastic sheet extrusion device 1 is restarted to extrude the sheet (work), the wide fiber net sheet 21 is cut, the wide fiber net coiled material release device 2 stops working, and a third layer is continuously wound outside the second layer, so that the manufacturing of the third layer, namely the polyethylene outer protective layer of the fiber net pressure-bearing section, is completed. Alternatively, the wide plastic sheet extrusion device 1 may be activated before the wide web roll release device 2 is deactivated, so that there may be a composite of plastic sheet and web sheet that is more firmly wound around the mandrel 4.
The production line of the pipe in the embodiment is completely different from the existing production line, the traditional production mode of producing the fiber reinforced plastic composite pipe by spirally winding the narrow unidirectional glass fiber tape is thoroughly changed, the reciprocating spiral winding unidirectional glass fiber tape is not adopted any more, and the production mode of winding and coating the whole piece of wide fiber net at zero degree is adopted, so that the production efficiency is greatly improved, the same production line is used for comparing the composite pipe with the pipe diameter of 3 meters, and the production efficiency of the production line in the embodiment is improved by more than 40 times compared with that of the traditional production line and the technology.
In addition, the pipe production line can use wide fiber mesh sheets with longitudinal and transverse fibers to cover, the direction of the transverse fibers is consistent with the length direction of the pipe, the longitudinal fibers are continuously wrapped around the circumference of the pipe, and the pipe produced by using the fiber mesh structure has improved performances in three aspects of radial, axial and ring stiffness; that is, compared with the existing production line and production process, the apparatus of the present embodiment is used in combination with the wide web sheet 21 having the longitudinal and transverse fibers, and the same quality of raw materials is used, so that a pipe having a higher pressure level and a higher quality can be manufactured, the material and production cost can be reduced, and the rapid production and rapid construction of a large-caliber pipe can be ensured.
In this embodiment, the broad width plastic sheet extrusion apparatus 1 includes at least one plastic extruder 13, and a broad width sheet die 12 connected to the plastic extruder 13. At the end of the wide sheet mould 12, a transverse cutter 9 is also provided.
As a modification, as shown in fig. 2 to 5, a socket section 42 is provided at one end of the core mold body 41, having a second outer cylindrical surface with a diameter larger than that of the first outer cylindrical surface of the core mold body 41, for winding the wide plastic sheet 11, or for winding the wide web sheet 21, or for winding a composite layer of the wide plastic sheet 11 and the wide web sheet 21. The deformation may be continued on the basis of this, and the socket segments 42 may be provided in two at both ends of the core mold body 41.
The outer diameter of the bell section 42 is larger than the outer diameter of the socket section of the pipe after the core mold main body 41 is wound, and the outer wall of the bell section 42 is in a (straight) cylindrical shape. The mandrel 4 having such a structure can produce a socket structure in which the inner wall of the socket has a straight cylindrical structure.
Still further improvements include at least one ring groove raised ring 43 movably disposed on the outer wall of the socket section 42, as shown in fig. 5, the ring groove raised ring 43 being movably disposed on the outer wall of the socket section 42, and when the outer wall of the socket section 42 is covered with the wide plastic sheet 11 or the composite layer of the wide plastic sheet 11 and the wide fiber web sheet 21, the position will form a ring groove (formed on the inner wall of the socket of the pipe) on the inner wall of the socket, and the ring groove can be used to mount a seal ring when the socket structure is mated with the socket structure, thereby realizing the sealing function of the water in the pipe through socket connection.
The movable seal ring groove bulge circular ring 43 has the advantages that when the pipe is produced, the core mold 4 is contracted and taken out, the seal ring groove bulge circular ring 43 and the pipe are separated integrally from the core mold 4, and the seal ring groove bulge circular ring 43 and the socket section 42 are combined together to support and protect the seal ring groove; when a socket connection is required, the ring groove raised ring 43 is removed (or destroyed) and the seal is then reinstalled in the groove.
Still further, the pipe production line of the present embodiment can produce a pipe using the wide web sheet 21 having side portions. In the pipe production line of the present embodiment, when the wide web sheet 21 is wound around the mandrel 4, the net-like body portion of the wide web sheet 21 is wrapped around the outer wall of the mandrel body 41, and the side portion containing the transverse fibers is wrapped around the outer wall of the socket section 42, thereby producing a structure in which the straight section of the composite pipe contains the radial-axis bidirectional web, and the socket section contains no circumferential fibers (i.e., radial fibers) and only axial fibers.
The forming press roll apparatus 6 is installed by a parallel moving type driving structure such that an outer circumferential surface of the forming press roll apparatus 6 is in parallel contact with an outer circumferential surface of the core mold 4, as shown in fig. 1, the parallel moving type driving structure includes: the fixing plates 61 are arranged in a pair and are opposite to each other; the long strip-shaped sliding grooves 62 are symmetrically arranged on the fixed plate 61; a sliding bearing block 63 movably installed inside the elongated sliding groove 62; shafts at both ends of the forming press roller device 6 are respectively installed in bearing inner holes inside the corresponding sliding bearing seats 63; the two cylinders 65 and the two cylinders are respectively fixedly arranged on the fixed plate 61, and the top end of an output shaft of each cylinder 65 and the top end of an output shaft of each cylinder are connected with the sliding bearing seat 63.
The forming press roll device 6 is movably installed by a parallel moving type driving structure, and the distance between the outer wall of the forming press roll device and the outer wall of the core mold 4 can be adjusted along with the increase of the thickness of the material wound on the outer cylindrical surface of the core mold 4.
The cylinder 65 or the oil cylinder fixedly provided on the fixing plate 61, the top end of the output end thereof is connected with the sliding bearing block 63, and the forming press roll 64 is pushed and extruded toward the direction of the core mold 4 through the sliding bearing block 63, so that the forming press roll 64 can extrude the combination of the plastic sheet and the web sheet wound on the outer wall of the core mold 4, and can be attached to the outer wall of the core mold 4. When the material wound on the outer wall of the core mold 4 is thicker, the air cylinder 65 is compressed and retracted to drive the sliding forming press roll 64 to retract correspondingly, so that the distance between the forming press roll 64 and the core mold 4 can be matched with the thickness of the material wound on the outer wall of the core mold 4.
As a modification, the fixing plate 61 is movably and adjustably fixedly installed in a direction approaching or separating from the core mold 4. The fixing plate 61 may be movably and adjustably mounted by other mechanical means through a chute, a fixing pin, or the like, and the distance between the forming press roller 64 and the core mold 4 may be further adjusted by adjusting the position of the fixing plate 61.
The heating device 7 is arranged at a position where the wide plastic sheet 11 is connected with the mandrel 4 at a certain angle; or a position where the wide web sheet 21 is connected at an angle to the core die 4; or the position where the composite layer of the broad plastic sheet 11 and the broad fiber web sheet 21 is connected with the mandrel 4 at a certain angle comprises a first heating panel 71 and a second heating panel 72, wherein the first heating panel 71 is arranged towards the mandrel 4, and the second heating panel 72 is arranged towards the direction of the composite layer of the fiber web sheet and the plastic sheet and is used for heating two joint surfaces to be combined together, and the two joint surfaces between two layers of materials are fused and compounded under the extrusion action of the forming press roll device 6.
The heating device 7 is an infrared heating device, so that the heating efficiency is high and the safety is improved.
And a cutting device 8 arranged downstream of the extrusion conveyor 3 for cutting the wide web sheet 21 after the completion of the wide web composite production of the tube.
Also comprises a transverse cutter 9 which is arranged at the outlet of the broad width sheet mould 12 of the broad width plastic sheet extrusion device 1 and cuts off the plastic sheet when the plastic extrusion sheet is not needed.
The pipe produced by the production line of the embodiment can be directly used or used as a basic product, and further processed in the next step to further enhance the functions.
The production line of the embodiment can be used for producing pipes with different structures.
The production method of the wide fiber net reinforced plastic composite pipe production line in the embodiment is as follows:
first stage
1) The water, electricity and gas of the production line are prepared in place in advance, the wide-width fiber net composite coiled material is installed in place, the wide-width plastic sheet extrusion device 1 and the wide-width sheet die 12 reach a set temperature, the mandrel 4 is started to rotate, and the first heating panel 71 is opened, so that the outer wall of the mandrel 4 reaches the set temperature;
2) Starting the heated wide plastic sheet extrusion device 1, extruding the wide plastic sheet 11, rolling and leveling the wide plastic sheet 11 by the extrusion conveying device 3, continuously conveying the wide plastic sheet 11 forwards, extruding and compositing the wide plastic sheet 11 on the outer surface of the continuously rotating mandrel 4 by the forming press roll 64, unwinding the wide fiber web coiled material release device 2 within the length that the wide plastic sheet 11 does not exceed the mandrel 4 by one circle, and conveying the wide fiber web sheet 21 and the molten wide plastic sheet 11 together into a gap between the press rolls of the extrusion conveying device 3 from the lower part of the wide plastic sheet 11, and winding the wide fiber web coiled material onto the mandrel 4 by the extrusion conveying device 3 and the forming press roll device 6; at this time, the second heating panel 72 is opened and reaches a set temperature, and as the mandrel driving device 5 is driven, a layer of inner layer of the pipe material formed by compounding the wide plastic sheet 11 and the wide fiber web sheet 21 is gradually wound on the outer wall of the mandrel 4;
3) After winding 360 degrees or more, the wide plastic sheet 11 is cut off using the transverse cutter 9, so that the wide plastic sheet 11 is wound around the outer surface of the core mold 4 with a uniform plastic inner layer to form the plastic inner layer of the pipe.
Second stage
Continuously hot-melting winding the wide fiber web sheet 21 until the number of fiber web winding layers required by the pressure grade is reached and the required thickness of the pipe pressure grade is reached, cutting off the wide fiber web sheet 21 by using a cutting device 8, continuously rotating the core mold 4, stopping heating by the heating device 7, and continuously rolling the outer surface of the wide fiber web reinforcing layer to form an intermediate fiber web reinforcing layer.
After the second stage of hot-melt winding and compounding of the middle fiber web reinforcing layer is completed, the process can be shifted to the next process to perform circumferential fiber winding and compounding of the socket section, spiral hot-melt winding of the trapezoid continuous fiber reinforcing rib and subsequent hot-melt winding of outer layer plastic.
Third stage
The width of the wide plastic sheet extrusion device 1 is controlled and then the device is operated again, the width of the extruded wide plastic sheet 11 is equal to the length of the same diameter pipe (and the main part of the pipe or the main part and the spigot part) of the fiber web pressure-bearing section, the wide plastic sheet is wound on a core mould 4 (the outer wall of the fiber web reinforced layer) through an extrusion conveying device 3 and a forming press roller device 6, and a plastic outer layer with set thickness is gradually wound on the outer layer of the fiber web reinforced layer along with the rotation of the core mould driving device 5 (when the composite pipe with a bell mouth is produced, the plastic outer layer only covers the fiber web reinforced layer with the same outer diameter and does not cover the fiber layer in the axial direction of the bell mouth section). After the hot-melt compounding of the outer plastic layer is completed, the pipe with the bellmouth section is transferred to the next procedure, and hot-melt compounding winding of the peripheral fiber layer of the bellmouth section, hot-melt winding compounding of the peripheral fiber outer plastic layer and hot-melt compounding of the hollow wall spiral reinforcing rib are carried out.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the application.
Claims (10)
1. A wide web reinforced plastic composite tubing production line, comprising:
a wide plastic sheet extrusion device (1) for extruding a wide plastic sheet (11);
a wide web roll release device (2) arranged downstream of the wide plastic sheet extrusion device (1) for temporarily storing and releasing a wide web sheet (21) placed in a roll;
-at least one group of extrusion transfer means (3), arranged downstream of said wide plastic sheet extrusion means (1) and/or said wide web material release means (2), for receiving and transferring said wide plastic sheet (11); or for receiving and transporting the wide web sheet (21); or a composite layer for receiving and transporting the wide plastic sheet (11) and the wide web sheet (21);
a mandrel (4) disposed downstream of the extrusion conveyor (3), comprising a mandrel body (41), the mandrel body (41) having a first outer cylindrical surface for winding the wide plastic sheet (11), or for winding the wide web sheet (21), or for winding a composite layer of the wide plastic sheet (11) and the wide web sheet (21);
the width of the molten wide plastic sheet (11) extruded by the wide plastic sheet extruding device (1) is close to or slightly smaller than the length of the mandrel (4);
the mandrel driving device (5) is used for driving the mandrel (4) to rotate;
forming press roller devices (6) which are at least one group and are axially parallel to the core mold (4) and are used for extruding and compounding the wide plastic sheet (11) to the outer cylindrical surface of the core mold (4); or the wide fiber web sheet (21) is extruded and compounded on the outer cylindrical surface of the mandrel (4); or extruding and compositing the composite layer of the broad plastic sheet (11) and the broad fiber web sheet (21) onto the outer cylindrical surface of the core mold (4);
a heating device (7) arranged between the mandrel (4) and the extrusion conveying device (3);
for heating the surface of the rotating mandrel (4);
and/or heating the upper surface of the wide plastic sheet (11) which has not been wound around the core mold (4); or heating the upper surface of the wide web sheet (21) which has not been wound around the core mold (4); or heating the upper surface of the composite layer of the wide plastic sheet (11) and the wide web sheet (21) which has not been wound on the core mold (4);
and/or heating the outer surface of the wide plastic sheet (11) which has been wound on the outer circumferential surface of the core mold (4); or heating the outer surface of the wide web sheet (21) which has been wound on the outer circumferential surface of the core mold (4); or heating the outer surface of the composite layer of the wide plastic sheet (11) and the wide fiber web sheet (21) which has been wound on the outer circumferential surface of the core mold (4);
the wide web sheet (21) is a thermoplastic fiber composite sheet comprising longitudinal fibers and transverse fibers; when the wide web sheet (21) is wound around the outer surface of the core mold (4), the direction of the transverse fibers is identical to the longitudinal direction of the core mold (4), and the longitudinal fibers are continuously wrapped around the circumference of the core mold (4).
2. The pipe production line of claim 1, wherein: the broad width plastic sheet extrusion device (1) comprises at least one plastic extruder (13) and a broad width sheet die (12) connected with the plastic extruder (13).
3. The pipe production line according to claim 1 or 2, characterized in that: when the broad width plastic sheet extrusion device (1) and the broad width fiber web coiled material release device (2) work simultaneously, the broad width plastic sheet (11) extruded by the broad width plastic sheet extrusion device (1) is positioned above the broad width fiber web sheet (21) released by the broad width fiber web coiled material release device (2).
4. The pipe production line of claim 1, wherein: the mandrel (4) further comprises a socket section (42) provided with one or two, one or two ends of the mandrel body (41) are provided with a second outer cylindrical surface, and the diameter of the second outer cylindrical surface is larger than that of the first outer cylindrical surface of the mandrel body (41) and is used for winding the wide plastic sheet (11), the axial fiber layer of the wide fiber web sheet (21) or the composite layer of the wide plastic sheet (11) and the axial fiber layer of the wide fiber web sheet (21).
5. The pipe production line of claim 4, wherein: and at least one seal ring groove bulge ring (43) movably arranged on the outer cylindrical surface of the socket section (42).
6. The pipe production line of claim 1, wherein: the forming press roll device (6) is installed through a parallel moving type driving structure, so that the outer circular surface of the forming press roll device (6) is in parallel contact with the outer circular surface of the core mold (4), and the parallel moving type driving structure comprises:
a pair of fixing plates (61) which are oppositely arranged;
the strip-shaped sliding grooves (62) are symmetrically arranged on the fixed plate (61);
a sliding bearing seat (63) movably installed inside the elongated sliding groove (62);
shafts at two ends of the forming press roll device (6) are respectively arranged in bearing inner holes in the corresponding sliding bearing blocks (63);
the two cylinders (65) or the two cylinders are respectively and fixedly arranged on the fixed plate (61), and the top end of an output shaft of each cylinder or each cylinder is connected with the sliding bearing seat (63).
7. The pipe production line of claim 6, wherein: the fixing plate (61) is movable in parallel back and forth in a direction toward or away from the core mold (4).
8. The pipe production line of claim 1, wherein: the heating device (7) is arranged at a position where the wide plastic sheet (11) is connected with the mandrel (4) at a certain angle; or the wide web sheet (21) is connected to the core die (4) at an angle; or the position where the composite layer of the broad plastic sheet (11) and the broad fiber web sheet (21) is connected with the mandrel (4) at a certain angle comprises a first heating panel (71) and a second heating panel (72), wherein the first heating panel (71) is arranged towards the outer cylindrical surface of the mandrel (4), and the second heating panel (72) is arranged towards the upper surface of the broad plastic sheet (11); or towards the upper surface of the wide web sheet (21); or towards the upper surface of the composite layer of the broad plastic sheet (11) and the broad web sheet (21).
9. The pipe production line of claim 8, wherein: the heating device (7) is an infrared heating device.
10. The pipe production line of claim 1, wherein: further comprising a cutting device (8) arranged downstream of the extrusion conveyor (3);
and/or, the device also comprises a transverse cutter (9) which is arranged at the outlet of a broad sheet mould (12) of the broad plastic sheet extrusion device (1).
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| CN202310155712.XA CN115972554B (en) | 2023-02-23 | 2023-02-23 | Production line of wide fiber web reinforced plastic composite pipe |
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| CN202310155712.XA CN115972554B (en) | 2023-02-23 | 2023-02-23 | Production line of wide fiber web reinforced plastic composite pipe |
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| CN115972554B true CN115972554B (en) | 2023-11-24 |
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| EP3964339B1 (en) * | 2020-07-10 | 2024-01-03 | Jiangsu Qiyi Technology Co., Ltd | Method and device for preparing unidirectional continuous fiber reinforced thermoplastic composite material |
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| EP0847845A1 (en) * | 1996-12-10 | 1998-06-17 | Hoechst Celanese Corporation | Thermoformable sheets having core layer with unmatted, oriented fibers and fiber-free cap layer |
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| CN115972554A (en) | 2023-04-18 |
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