CN111619143B - Pultrusion device and technology - Google Patents
Pultrusion device and technology Download PDFInfo
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- CN111619143B CN111619143B CN202010476568.6A CN202010476568A CN111619143B CN 111619143 B CN111619143 B CN 111619143B CN 202010476568 A CN202010476568 A CN 202010476568A CN 111619143 B CN111619143 B CN 111619143B
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- yarn
- pultrusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/525—Component parts, details or accessories; Auxiliary operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/521—Pultrusion, i.e. forming and compressing by continuously pulling through a die and impregnating the reinforcement before the die
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/543—Fixing the position or configuration of fibrous reinforcements before or during moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/56—Tensioning reinforcements before or during shaping
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses a pultrusion device which comprises a gum dipping system, a molding system and a traction system, wherein the molding system comprises a mold and a mold core, the mold core penetrates through a mold cavity of the mold, a tubular passage is formed between the mold core and the cavity wall of the mold cavity, a yarn guide plate is arranged at an inlet of the mold cavity, a plurality of yarn guide holes are uniformly and annularly arranged on the yarn guide plate, the yarn guide plate is coaxially arranged with the mold cavity and the mold core, the auxiliary device is fixedly arranged between the molding system and the traction system, the auxiliary device comprises a yarn pulling plate, a first through hole is formed in the center of the yarn pulling plate, a plurality of yarn pulling holes are uniformly annularly arranged around the first through hole and correspond to the yarn guide holes, the end part of the mold core penetrates through the first through hole, and the yarn pulling plate and the yarn guide plate are coaxially arranged. The invention also discloses a pultrusion process, and by adopting the pultrusion device, the size deviation abnormity caused by uneven distribution of the yarns in the pultrusion curing process is greatly improved by the pultrusion device and the process.
Description
Technical Field
The application relates to the technical field of power transmission insulating material forming, in particular to a pultrusion device and a pultrusion process.
Background
In the existing hollow pultruded pipe forming process, a preforming and forming device adopts a mode of combining structures such as an inner core and an outer mold; specifically, after being gummed, yarns are threaded into a mold through a preformed yarn guide plate for solidification and molding, and the yarns have long walking paths and large angle deviation; in addition, the core die sags due to self weight to extrude yarns, so that the yarns in the die are gathered, conglomerated and irregularly distributed, and finally the dimension of the cured product is abnormal, particularly the circumferential dimension deviation of the pipe, and common defects such as eccentricity and roundness variation of the pipe and deformation of the pipe are shown.
In the mode, the size deviation of the hollow pultrusion tube after curing molding is improved usually by inner core fine adjustment or inner core and die coaxiality design precision and the like, but the adjustment effect is poor; the problem that heavier or longer mold core exists is more obvious, and there is great deviation in the pultrusion goods size, finally leads to product inefficiency, and the defective rate is high, and production is scrapped and is lost greatly.
Disclosure of Invention
Aiming at the defects of the prior art, one of the purposes of the invention is to provide a pultrusion device, wherein an auxiliary device is designed to control the circumferential arrangement of yarn outlet openings of a die, so that yarns are distributed at the front end and the rear end of the die correspondingly, the yarns are kept to be uniformly distributed in the die under the action of yarn tension and the orientation of the auxiliary device, the yarns are prevented from migrating and knotting in the curing process of products, and the abnormal size deviation caused by the nonuniform distribution of the yarns in the pultrusion curing process is greatly improved.
In order to achieve the purpose, the technical means adopted by the invention are as follows: the utility model provides a pultrusion device, a be used for making hollow pultrusion pipe, along pultrusion advancing direction, include the impregnation system in proper order, molding system and traction system, molding system includes mould and mold core, the mold core passes the die cavity of mould, form the tubulose passageway between the chamber wall of mold core and die cavity, the entrance of die cavity sets up the yarn guide plate, the even cyclic annular of yarn guide plate sets up a plurality of yarn guide holes, the yarn guide plate sets up with die cavity and mold core are coaxial, still include auxiliary device, auxiliary device fixes to set up between molding system and traction system, auxiliary device is including the yarn guide plate, the yarn guide plate center sets up first through-hole, and around first through-hole and correspond the cyclic annular even a plurality of yarn guide holes that set up of yarn guide hole, first through-hole is passed to the mold core tip, the yarn guide plate sets up with the yarn guide plate is coaxial.
The pultrusion device is provided with the yarn pulling plate of the auxiliary device, so that the entanglement of yarns is reduced to the maximum extent in the process of leading in the yarns in the starting-up stage of the pultrusion device; after the initial yarn is impregnated, the problem that the yarns of an upper die and a lower die are not uniformly distributed due to self weight is solved; the arrangement of the first through hole solves the problem that the core die is eccentric due to the influence of dead weight, so that the thickness of the hollow pultrusion tube is uniform in the circumferential direction.
More preferably, the auxiliary device further comprises a supporting device, the supporting device enables the yarn pulling plate to be fixed in position, and the supporting device enables the yarn pulling plate to be more reliably and conveniently fixed.
More preferably, the supporting device comprises a mounting plate and a plurality of mounting rods, the yarn pulling plate is arranged between the mounting plate and the forming system, and the mounting rods sequentially penetrate through the forming system, the yarn pulling plate and the mounting plate and are fixedly locked. The detachable mounting rod penetrates through the yarn pulling plate and is fastened and assembled; after pultrusion is started, the yarn is dipped into a molding system to be cured, at the moment, the yarn has certain tension under the action of traction force and the directional action of a yarn pulling plate, the yarn guide plate and the yarn pulling plate are correspondingly distributed at two ends of a mold cavity, namely, the yarn is uniformly distributed in the mold cavity, and the first section structure of the product is molded along with the curing process; at the moment, the mounting rod is removed, only the yarn pulling plate is reserved, and the yarn pulling plate and the yarn are moved together under the action of external traction force.
More preferably, the support device further comprises a support bracket, the support bracket carrying the mounting plate. The support frame makes the fixing of mounting panel more reliable convenient.
Preferably, the mold core extends out of the mold cavity to form a mold core extension body, the part of the mold core positioned in the mold cavity is a mold core body, and the mold core extension body is detachable from the mold core body. When the auxiliary device is disassembled, the die core extension body can also be disassembled, so that the overall weight of the die core is reduced, and the influence of the eccentricity of the die core is further reduced.
Preferably, the yarn pulling plate is equal in diameter to the end of the die and is coaxially and fixedly arranged at the outlet of the die. The diameter of the end part of the yarn pulling plate is equal to that of the end part of the die, and the yarn pulling plate can be directly matched and fixed with the end part of the die.
Preferably, the yarn guide plate is provided with a second through hole in the center, and the end part of the other end of the mold core penetrates through the second through hole.
Preferably, a positioning plate is arranged between the impregnation system and the forming system, a plurality of positioning rods sequentially penetrate through the positioning plate, the yarn guide plate and the forming system and are fixedly locked, the structure and the fixing mode of the yarn guide plate and the yarn pulling plate can be the same, and the yarn guide plate and the yarn pulling plate are symmetrically distributed at two ends of a die cavity of the forming system, so that the pultrusion device is simplified in design and convenient to process and assemble.
Aiming at the defects of the prior art, the invention also aims to provide a pultrusion process, which can improve the eccentricity problem of a core die and greatly improve the abnormal size deviation caused by uneven distribution of yarns in the pultrusion curing process.
In order to achieve the purpose, the technical means adopted by the invention are as follows: by adopting the pultrusion device, the auxiliary device is detached when the hollow pultrusion tube leaves the die cavity. After pultrusion is started, the yarn is dipped into the mold and starts to be solidified, at the moment, the yarn has certain tension under the action of traction force and the orientation action of the yarn pulling plate, the yarn guide plate and the yarn pulling plate are correspondingly distributed at two ends of the mold cavity, namely, the yarn is uniformly distributed in the mold cavity, and the first section structure of the product is formed along with the solidification process.
Preferably, the yarn pulling plate moves together with the hollow pultrusion tube along with the traction system, the yarn pulling plate is kept at the junction of the yarn and the hollow pultrusion tube, passes through the traction system and reaches the final cutting position, the hollow pultrusion tube and the yarn pulling plate are cut together, and the auxiliary device is completely disassembled.
According to the pultrusion process, the yarns are distributed at the front end and the rear end of the die correspondingly by adopting the pultrusion device, the yarns are kept to be uniformly distributed in the die under the action of yarn tension and the orientation of the auxiliary device, the yarns are prevented from migrating and knotting in the curing process of products, and the abnormal size deviation caused by nonuniform distribution of the yarns in the pultrusion curing process is greatly improved.
Drawings
FIG. 1 is a schematic view of a pultrusion apparatus 100 according to a first embodiment of the present invention;
FIG. 2 is a cross-sectional view of a molding system 130 according to a first embodiment of the present invention;
fig. 3 is a schematic plan view of a yarn drawing plate 141 according to a first embodiment of the present invention;
FIG. 4 is a schematic view of a pultrusion apparatus 200 according to a second embodiment of the present invention;
FIG. 5 is a schematic view of a pultrusion apparatus 300 according to a third embodiment of the present invention;
fig. 6 is a schematic plan view of a yarn pulling plate 341 according to a third embodiment of the present invention.
Detailed Description
As required, detailed embodiments of the present invention are disclosed herein. However, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which may be embodied in various forms. Therefore, specific details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention in virtually any appropriately detailed manner, including employing various features disclosed herein in combination with features that may not be explicitly disclosed herein.
The first embodiment is as follows:
as shown in fig. 1 and 2, the present embodiment provides a pultrusion apparatus 100 for manufacturing a hollow pultruded tube, which comprises a dipping system 110, a forming system 130 and a traction system 120 in sequence along a pultrusion advancing direction a. The molding system 130 comprises a mold 134 and a mold core 132, the mold core 132 penetrates through a mold cavity 131 of the mold 134, a tubular channel is formed between the mold core 132 and the cavity wall of the mold cavity 131, the tubular channel provides a space for guiding the yarn 101 and molding a hollow pultrusion tube, a yarn guide plate 133 is arranged at an inlet of the mold cavity 131, a plurality of yarn guide holes are uniformly and annularly formed in the yarn guide plate 133, specifically, a plurality of yarn guide holes which are annularly arranged around the tubular channel are uniformly formed in the yarn guide plate 133, and the yarn guide plate 133, the mold cavity 131 and the mold core 132 are coaxially arranged. The pultrusion device 100 further comprises an auxiliary device 140, the auxiliary device 140 is fixedly arranged between the forming system 130 and the traction system 120, the auxiliary device 140 comprises a yarn pulling plate 141, as shown in fig. 3, a first through hole 1411 is arranged in the center of the yarn pulling plate 141, a plurality of yarn pulling holes 1412 are uniformly arranged around the first through hole 1411, the plurality of yarn pulling holes 1412 are arranged corresponding to the plurality of yarn guiding holes on the yarn guiding plate 133, the end of the mold core 132 passes through the first through hole 1411, and the yarn pulling plate 141, the yarn guiding plate 133 and the mold cavity 131 are coaxially arranged. During the threading of the yarn 101, the yarn 101 sequentially passes through the yarn guide plate 133, the mold cavity 131 of the molding system 130 and the yarn pulling plate 141, and at this time, under the action of the traction force and the orientation of the yarn pulling plate 141, the yarn 101 has a certain tension, and the yarn guide plate 133 and the yarn pulling plate 141 are correspondingly distributed at two ends of the mold cavity 131, that is, the yarn 101 is uniformly distributed in the mold cavity 131.
In this embodiment, the specific structure of the yarn guide plate 133 is similar to that of the yarn pulling plate 141, and the yarn guide hole and the yarn pulling hole 1412 may be correspondingly arranged. In other embodiments, other features of the yarn pulling plate and the yarn guiding plate, such as the size, whether the through hole is formed in the center, and whether other mounting holes are formed, may be the same or different, as long as the use requirements of the yarn guiding plate and the yarn pulling plate can be met, that is, the yarn guiding plate and the yarn pulling plate give a certain tension to the yarn, so that the yarn is not tangled in the mold cavity.
The pultrusion device 100 is provided with the yarn pulling plate 141 of the auxiliary device 140, so that the entanglement of the yarns 101 is reduced to the maximum extent during the process that the yarns 101 are led in when the pultrusion device 100 is started; after the initial yarn 101 is impregnated, the problem that the yarn 101 of an upper die and a lower die is not distributed uniformly due to self weight is solved; the arrangement of the first through hole 1411 solves the problem that the mold core 132 is eccentric due to dead weight, so that the thickness of the hollow pultruded tube is uniform in the circumferential direction.
In this embodiment, the auxiliary device 140 further comprises a supporting device 150, the supporting device 150 is used for supporting the yarn pulling plate 141 so that the yarn pulling plate 141 is coaxial with the mold cavity 131 and is fixed in position, and the supporting device 150 is arranged so that the fixing of the yarn pulling plate 141 is more reliable and convenient. In other embodiments, the auxiliary device can also fix the position of the yarn pulling plate by adopting a hoisting fixing mode.
In this embodiment, the supporting device 150 includes a mounting plate 152 and a plurality of mounting rods 153, the yarn pulling plate 141 is disposed between the mounting plate 152 and the forming system 130, and the plurality of mounting rods 153 sequentially pass through the forming system 130, the yarn pulling plate 141 and the mounting plate 152 and are fixedly locked. The detachable mounting rod 153 penetrates through the yarn pulling plate 141 and is matched with the bolt fastening assembly, so that the auxiliary device 140 can be conveniently mounted and dismounted, and the coaxiality between the yarn pulling plate 141 and the yarn guide plate 133 and the mold cavity 131 can be effectively ensured. After pultrusion is started, the yarns 101 are transferred to enter the molding system 130 to start curing through the traction system 120 along the pultrusion advancing direction a after gum dipping, at the moment, under the action of traction force and the directional action of the yarn pulling plate 141, the yarns 101 have certain tension, the yarn guide plate 133 and the yarn pulling plate 144 are correspondingly distributed at two ends of the die cavity 131, namely, the yarns 101 are kept to be uniformly distributed in the die cavity 131, and the thickness of the wall of the molded hollow pultruded pipe is kept uniform in the circumferential direction due to the uniform distribution of the yarns 101, so that the eccentric problem of the hollow pultruded pipe is reduced to the maximum extent. After the first section of hollow pultrusion tube in the molding system 130 is molded, the mounting rod 153 is removed, only the yarn pulling plate 141 is retained, and at this time, the yarn pulling plate 141 and the yarn 101 can move in the pultrusion advancing direction a under the action of external traction force, so that the molded hollow pultrusion tube is not hindered from moving outwards from the mold cavity 131.
In the embodiment, the yarn pulling plate 141 is provided with a mounting hole 1413 for the mounting rod 153 to pass through, the diameter of the mounting rod 153 is matched with the diameter of the mounting rod 153, and the mounting rod 153 can pass through the mounting hole 1413 and is fixedly locked to keep the position of the yarn pulling plate 141 fixed. In other embodiments, instead of the mounting bar, the plate may be provided without a perforation operation, for example, the plate may be directly fixed to the support device.
In the present embodiment, the yarn pulling plate 141 is provided with four mounting holes 1413, and in other embodiments, the number of the mounting holes is not particularly limited as long as a space for the mounting rod to pass through is provided.
In this embodiment, a mounting plate is also provided on the end of the molding system 130, and is directly fixedly connected to the molding system 130. In other embodiments, the end of the molding system may not be provided with other mounting components, and the mounting rod is directly inserted into the molding system, or other connection methods are adopted as long as the mounting and fixing requirements of the mounting rod can be met.
In this embodiment, the supporting device 150 further includes a supporting frame 151, and the supporting frame 151 carries the mounting plate 152. The support frame 151 is arranged to enable the mounting plate 152 to be fixed more reliably and conveniently.
In other embodiments, the supporting device may be in the form of a supporting table, an auxiliary device integrally supported, or any other form that can provide a good support, and is not limited to the form of the supporting frame 151 in this embodiment.
In this embodiment, the mold core 132 extends out of the mold cavity 131 to form a mold core extension 1322, the portion of the mold core located in the mold cavity 131 is a mold core body 1321, the mold core extension 1322 is detachably connected to the mold core body 1321, and the end of the mold core extension 1322 passes through the first through hole 1411, so that the yarn pulling plate 141 and the mold cavity 131 can be coaxial quickly and conveniently. When the auxiliary device 140 is disassembled, the mold core extension body 1322 is disassembled first, so that the overall weight of the mold core 132 is reduced, and the phenomenon that the quality of the hollow pultruded tube is affected by the eccentricity of the mold core extension body 1322 after the auxiliary device 140 is disassembled can be avoided.
In other embodiments, the mold core may be integrally formed without distinguishing the mold core body from the mold core extension body.
In other embodiments, the mold core may be a non-solid structure, and one form is hollow as a whole, which can reduce the weight of the mold core, further reduce the influence of eccentricity of the mold core, thereby making the wall thickness of the hollow pultruded tube uniform, and reducing the manufacturing cost; alternatively, the above-mentioned technical effect can be achieved by gradually reducing the unit weight of the core in the pultrusion advance direction.
In other embodiments, the core body may be a solid structure and the core extension body may be a hollow structure, so that the weight of the core extension body does not have an excessive influence on the overall weight of the core no matter whether the core extension body is disassembled during the formal pultrusion process.
Above-mentioned pultrusion device 100, design auxiliary device 140 is through controlling the hoop of yarn 101 play die cavity 131 to arrange, thereby make yarn 101 can correspond the distribution at die cavity 131 front end and rear end along pultrusion advancing direction a, under yarn tension and auxiliary device 140 directional action, keep yarn 101 evenly distributed in die cavity 131, it ties to avoid the migration of yarn 101 in the goods curing process, the very big degree has improved the size deviation that yarn 101 distributes unevenly and leads to in the pultrusion curing process unusually, avoid the size defect of hollow pultrusion pipe, product quality is improved.
Example two:
as shown in fig. 4, the pultrusion apparatus 200 provided in the present embodiment is different from the first embodiment in the structure and the fixing and mounting manner of the yarn guide plate 233.
In this embodiment, the yarn guide plate 233 is provided with a second through hole at the center through which the end of the other end of the core 232 passes. That is, in this embodiment, both the yarn guide plate 233 and the yarn pulling plate 241 are provided with a through hole at the center, and the yarn guide hole and the yarn pulling hole are correspondingly provided. The structure can ensure that the yarns are not knotted in the advancing process to the maximum extent, the coaxiality of each component can be ensured, the fibers of the finally pultruded hollow pultruded pipe are axially distributed, and the wall thickness is uniform.
In this embodiment, a positioning plate 260 is disposed between the dipping system and the molding system 230, and along the pultrusion advancing direction a, a plurality of positioning rods 261 sequentially pass through the positioning plate 260, the yarn guide plate 233 and the molding system 230 and are fixedly locked, and the yarn guide plate 233 and the yarn pulling plate 241 may have the same structure and fixing manner and are distributed at two ends of the cavity of the molding system 230, thereby facilitating processing and assembly.
In this embodiment, the number of the yarn guide plates 233 is two, which further increases the tension of the yarn and ensures that the yarn is not knotted during the introduction of a long yarn.
In other embodiments, the number of the yarn guide plates can be one or three, and the number of the yarn guide plates is reasonably set according to the yarn guide distance between the dipping system and the forming system.
In this embodiment, the core 232 sequentially passes through the positioning plate 260, the yarn guide plate 233 and the through hole in the center of the forming system 230, and the end of the core 232 is fixed on the positioning plate 260, which can ensure that the yarn does not tangle in the center when passing through the distance between the dipping system and the forming system 130. In other embodiments, the end of the mold core need not extend to the positioning plate, but may be located at the inlet of the molding system.
The pultrusion device 200 has the advantages that the number of the yarn guide plates 233 is increased, the installation modes of the yarn guide plates 233 and the yarn pulling plates 241 are the same, the design of the pultrusion device 200 is simplified, and the pultrusion device is convenient to process and assemble.
Example three:
as shown in fig. 5 and 6, the pultrusion apparatus 300 provided in the present embodiment is different from the first embodiment in the structure and installation manner of the pulling plate 341.
In this embodiment, a protruding ring 3413 is provided around the edge of the pulling plate 341 on the side of the pulling plate 341 facing the forming system 330, and the inner diameter of the protruding ring 3413 is equal to the diameter of the end of the die, i.e. the pulling plate 341 can be snapped right on the end of the die and is coaxially fixed at the outlet of the die. The inner diameter of the convex ring 3413 is equal to the diameter of the end of the die, so that the yarn pulling plate 341 can be directly matched with the die, and the installation mode of the yarn pulling plate 341 is simplified.
In this embodiment, the yarn pulling plate 341 may be specifically attached by directly fastening the convex ring 3413 to the end of the mold, punching a hole in the outer peripheral surface of the convex ring 3413 and the end of the corresponding mold, and fixing the same by fastening with a bolt. When the yarn pulling plate 341 is detached, the bolt is removed.
In other embodiments, the fixing mode of the yarn pulling plate can adopt binding and other modes, as long as the relative position of the yarn pulling plate and the die is fixed and no displacement occurs in the pultrusion process. The mounting and dismounting manner can be designed according to the specific structure of the yarn pulling plate, and is not particularly limited.
In this embodiment, the yarn pulling plate 341 is provided with a first through hole 3411 and a plurality of yarn pulling holes 3412, which are the same as the structure of the embodiment and will not be described again.
In other embodiments, the yarn pulling plate may not be provided with a convex ring, so that the yarn pulling plate and the end of the forming system can be directly fixedly connected by adopting a bolt punching mode, and the mode can also facilitate the installation and the disassembly of the yarn pulling plate.
In other embodiments, the diameter of the drawplate may be larger than the end diameter of the forming system, so long as the drawplate can be mounted at the end of the forming system.
The pultrusion device 300 simplifies the structure of the auxiliary device, can install the yarn pulling plate 341 without adopting a supporting device, simplifies the process, saves the cost, can better adjust the coaxiality, ensures the uniform thickness of the tube wall of the hollow pultrusion tube, and does not generate the eccentric problem; meanwhile, the yarn drawing work can be well finished, and knotting and deviation of the yarn in the guiding process are avoided.
Example four:
the present embodiment provides a pultrusion process employing any of the pultrusion apparatus described above, with the auxiliary means being removed as the hollow pultruded tube exits the die cavity.
In this embodiment, specifically, the pultrusion process comprises the following steps:
the pultrusion device is installed and comprises a gum dipping system, a molding system, a traction system and an auxiliary device, wherein the auxiliary device is fixedly arranged between the molding system and the traction system;
the yarn without the gum dipping solution sequentially passes through a yarn guide plate, a forming system and a yarn pulling plate, is finally connected to a traction system, and is guided to advance under the action of traction force;
starting the machine, starting gum dipping of the yarns, dragging and moving the yarns along the pultrusion advancing direction by a traction system, heating the dipped yarns by a forming system, and curing and forming the hollow pultrusion tube;
the molded hollow pultrusion tube is pulled by a traction system, and the hollow insulation tube advances to the position of the yarn pulling plate along the pultrusion advancing direction;
at the moment or before the moment, the auxiliary device is disassembled, so that the yarn pulling plate enters the traction system along with the hollow pultrusion pipe under the traction of the traction system;
and cutting the formed hollow pultrusion tube and the yarn pulling plate to complete the complete disassembly of the auxiliary device.
In this embodiment, pultrusion begins the back, draws the entering die cavity through traction system behind the yarn gumming and begins the solidification, and under traction force effect and the directional effect of drawing yarn board this moment, yarn evenly distributed in the die cavity avoids the product curing in-process yarn migration to tie a knot, and very big degree has improved the size deviation that the yarn distributes unevenly and leads to in pultrusion curing process unusual, avoids the size defect of hollow pultrusion pipe. The molded hollow pultrusion tube continues to advance along the pultrusion advancing direction, when the end part of the pultrusion tube enters the outlet of the molding system from the inlet of the molding system, the hollow pultrusion tube cannot penetrate through the yarn pulling plate to continue to advance due to the fixed arrangement of the yarn pulling plate, and therefore the auxiliary device for fixing the yarn pulling plate needs to be detached.
Specifically, when the pultrusion device 100 is used, as shown in fig. 1 to 3, after pultrusion is started, the yarns 101 are dipped and then migrate to the forming system 130 through the traction system 120 along the pultrusion advancing direction a to start curing, at this time, the yarns 101 are uniformly distributed under the action of traction force and the orientation of the pulling plate 141 to avoid abnormal size deviation, after the first section of hollow pultrusion tube located in the forming system 130 is formed, the mounting rod 153 is removed, only the pulling plate 141 is retained, at this time, the pulling plate 141 can migrate along the pultrusion advancing direction a together with the yarns 101 under the action of external traction force, and the formed hollow pultrusion tube cannot be prevented from moving outwards from the die cavity 131.
In this embodiment, the yarn pulling plate moves together with the traction system and the hollow pultrusion tube, the yarn pulling plate is kept between the yarns and the hollow pultrusion tube, and the yarn pulling plate moves through the traction system to reach the final cutting position, so that the hollow pultrusion tube and the yarn pulling plate are cut together, and the auxiliary device is completely disassembled.
In other embodiments, the entire yarn pulling plate can be disassembled if the yarn pulling holes on the yarn pulling plate can be opened.
In other embodiments, if the core extension body and the core main body are detachable, the core extension body can be detached while the auxiliary device is detached.
According to the pultrusion process, the yarns are correspondingly distributed at the two ends of the die cavity by adopting the pultrusion device, the yarns are uniformly distributed in the die cavity under the action of yarn tension and the orientation of the auxiliary device, the yarns are prevented from migrating and knotting in the curing process of products, the abnormal size deviation caused by nonuniform distribution of the yarns in the pultrusion curing process is greatly improved, and the product quality is improved.
While the invention has been described with reference to the above disclosure and features, it will be understood by those skilled in the art that various changes and modifications in the above constructions and materials can be made, including combinations of features disclosed herein either individually or in any combination, as appropriate, without departing from the spirit of the invention. Such variations and/or combinations are within the skill of the art to which the invention pertains and are within the scope of the following claims.
Claims (10)
1. The utility model provides a pultrusion device for make hollow pultrusion pipe, along pultrusion advancing direction, include impregnation system, molding system and traction system in proper order, molding system includes mould and mold core, the mold core passes the die cavity of mould, the mold core with form the tubulose passageway between the chamber wall of die cavity, the entrance of die cavity sets up the yarn guide plate, the yarn guide plate is even cyclic annular to be provided with a plurality of yarn guide holes, the yarn guide plate with the die cavity with the coaxial setting of mold core, its characterized in that:
still include detachable auxiliary device, auxiliary device fixed set up in the molding system with between the traction system, auxiliary device includes the drawing board, drawing board center sets up first through-hole, and centers on first through-hole just corresponds the annular a plurality of drawing holes that evenly set up in the yarn guide hole, the mold core tip passes first through-hole, the drawing board with the coaxial setting of yarn guide plate.
2. The pultrusion apparatus as recited in claim 1, wherein: the auxiliary device also comprises a supporting device, and the supporting device fixes the position of the yarn pulling plate.
3. The pultrusion apparatus as recited in claim 2, wherein: the supporting device comprises a mounting plate and a plurality of mounting rods, the yarn pulling plate is arranged between the mounting plate and the forming system, and the mounting rods sequentially penetrate through the forming system, the yarn pulling plate and the mounting plate and are fixedly locked.
4. The pultrusion apparatus as recited in claim 3, wherein: the support device further comprises a support frame, and the support frame bears the mounting plate.
5. The pultrusion apparatus as recited in claim 1, wherein: the mold core extends out of the mold cavity to form a mold core extension body, the part of the mold core, which is positioned in the mold cavity, is a mold core body, and the mold core extension body and the mold core body are detachable.
6. The pultrusion apparatus as recited in claim 1, wherein: the diameter of the end part of the yarn pulling plate is equal to that of the end part of the die, and the yarn pulling plate is coaxially and fixedly arranged at the outlet of the die.
7. The pultrusion apparatus as recited in claim 1, wherein: the yarn guide plate is provided with a second through hole in the center, and the end part of the other end of the mold core penetrates through the second through hole.
8. The pultrusion apparatus as recited in claim 1, wherein: and a positioning plate is arranged between the impregnation system and the forming system, and a plurality of positioning rods sequentially penetrate through the positioning plate, the yarn guide plate and the forming system and are fixedly locked.
9. A pultrusion process is characterized in that: the pultrusion apparatus as claimed in any one of claims 1 to 8, wherein the auxiliary device is removed as the hollow pultruded tube exits the die cavity.
10. The pultrusion process as recited in claim 9, wherein: the drawplate moves with the traction system and the hollow pultruded tube.
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