CN113799411A - Method and equipment for producing arrow shaft made of composite material - Google Patents
Method and equipment for producing arrow shaft made of composite material Download PDFInfo
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- CN113799411A CN113799411A CN202111089496.0A CN202111089496A CN113799411A CN 113799411 A CN113799411 A CN 113799411A CN 202111089496 A CN202111089496 A CN 202111089496A CN 113799411 A CN113799411 A CN 113799411A
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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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/32—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core on a rotating mould, former or core
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
- B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
- B29B15/10—Coating or impregnating independently of the moulding or shaping step
- B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
- B29B15/122—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex
- B29B15/125—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex by dipping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
- B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
- B29B15/10—Coating or impregnating independently of the moulding or shaping step
- B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
- B29B15/14—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length of filaments or wires
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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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/76—Cores
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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
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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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/545—Perforating, cutting or machining during or after 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/777—Weapons
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
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- Moulding By Coating Moulds (AREA)
Abstract
A method and equipment for producing arrow shaft made of composite material are mainly used for manufacturing arrow shaft with three-layer structure, and the equipment comprises an outer layer creel, an outer layer pre-dipping device, an inner layer creel, an inner layer pre-dipping device, a winding forming device and a traction cutting device; the outer-layer pre-dipping device is arranged right in front of the outer-layer creel and is mainly used for pre-dipping resin on yarns; two groups of outer-layer pre-dipping devices and outer-layer creels are arranged at two sides of the winding forming device; the inner-layer creel is used for placing yarn balls and controlling the rotation of yarns; the inner-layer pre-dipping device is arranged right in front of the inner-layer creel and is mainly used for pre-dipping resin on yarns and controlling the rotation of the yarns; the winding forming device is arranged right in front of the inner-layer pre-dipping device and mainly used for winding and heating and curing yarns; the traction cutting device is arranged right in front of the winding forming device and mainly used for drawing and extruding the arrow shaft and cutting the arrow shaft. The invention has low manufacturing cost, reduces waste materials in the production process, is safe and environment-friendly, and is suitable for the production of thin-wall arrow shafts.
Description
Technical Field
The invention relates to a production method and equipment of a composite material arrow shaft, in particular to a multilayer pultrusion and winding production method and equipment of a composite material thin-wall arrow shaft.
Background
The arrow shaft is the main part of preparation arrow, and the arrow is the consumer in the bow uses the engineering, along with the constantly improvement of bow pound number, also constantly improving the requirement to the arrow. The outer diameter of the arrow shaft is generally smaller, so that the arrow needs to be light to achieve higher arrow speed, and the wall of the arrow shaft needs to be thin; in order to improve the accuracy of shooting, the arrow is required to have high straightness and roundness; at the same time, the arrow cannot burst after shooting because of contact with the target, which requires a certain load-bearing capacity of the arrow shaft in the radial direction.
The existing arrow shaft equipment mainly adopts rolling as a main part, after the arrow shaft is rolled by a roller, the redundant thickness on the surface of the arrow shaft is removed through a lathe, so that the straightness and the roundness required by the arrow shaft are met, and the arrow shaft produced by pultrusion is unstable in tension control, so that the straightness of the pultruded arrow shaft is unstable, and is influenced by the required wall thickness, and the arrow shaft is easy to flatten in the traction process.
Disclosure of Invention
The invention aims to provide a composite material arrow shaft production device.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method for producing an arrow shaft made of composite materials comprises the following steps:
leading out outer layer yarns through a tension gun, enabling the outer layer yarns to have constant tension by using the tension gun, and enabling inner layer yarns to enter an inner layer pre-dipping device for pre-dipping resin;
secondly, the outer layer yarns enter an outer layer pre-dipping device for pre-dipping resin, then redundant tree fingers on the outer layer yarns are squeezed out, and then the outer layer yarns are sent to a pre-forming device on a winding forming device;
conveying the inner layer yarn in a rotating manner, winding and forming the inner layer yarn on the surface of the mold core in a spiral manner to form an inner layer spiral structure, and winding the inner layer yarn by winding yarn to form a middle layer winding structure so that the inner layer yarn is tightly formed on the mold core;
and step four, the winding yarns and the inner layer yarns are fixed together and then enter a preforming device together with the outer layer yarns, the outer layer yarns are arranged on the surfaces of the winding yarns in a vertical axial direction to form an outer layer vertical axial structure, the inner layer yarns fixed on the mold core and redundant resin on the winding yarns are extruded at the moment, all the yarns pass through a yarn guide and then enter an outer mold, the yarns are heated, cured and molded, the arrow shaft is output, and the arrow shaft is sent into a drying tunnel.
And step five, the arrow shaft is cooled from the drying tunnel and then enters a traction cutting device, firstly, a hydraulic cylinder starts to move to drive a lower clamping block to move upwards, the arrow shaft is slightly locked by an upper clamping block, a cutting cylinder drives a cutting motor to cut off the arrow shaft in front, the cut arrow shaft is taken away manually, then, the cutting motor and the cutting cylinder reset, a filling cylinder drives a second filling cylinder downwards to move, the second cylinder drives a filling rod to move forwards, the filling rod enters the arrow shaft, the hydraulic cylinder completely holds the arrow shaft tightly, then, the traction motor drives the arrow shaft to move integrally, the arrow shaft is pulled out, after a certain distance is pulled out, the hydraulic cylinder resets after the filling cylinder resets, and finally, the traction motor resets. A reciprocating cycle is started.
The device comprises an outer layer creel, an outer layer pre-soaking device, an inner layer creel, an inner layer pre-soaking device, a winding forming device and a traction cutting device;
the outer layer creel is used for placing an outer layer yarn ball, controlling the tension of the led-out outer layer yarn and leading out the outer layer yarn;
the outer-layer pre-dipping device is arranged right in front of the outer-layer creel and is used for pre-dipping resin on the outer-layer yarns; the outer-layer creel and the outer-layer pre-dipping device are arranged in two groups and are arranged on two sides of the winding forming device;
the inner layer creel is used for placing inner layer yarns required by the pulling and winding and enabling the inner layer yarns to integrally rotate;
the inner-layer pre-soaking device is arranged right in front of the inner-layer creel and is used for pre-soaking the inner-layer yarns and controlling the rotation of the inner-layer yarns;
the winding forming device is arranged right in front of the inner-layer pre-soaking device and is used for winding and heating and curing the yarns;
and the traction cutting device is arranged right in front of the winding forming device and is used for drawing the pultruded arrow shaft and cutting the arrow shaft according to a set size.
The outer creel comprises an outer yarn fixing frame, a plurality of groups of outer rollers and tension guns are mounted on the outer yarn fixing frame, and the tension guns are fixed right above the outer rollers of each group.
The outer-layer pre-dipping device comprises an outer-layer pre-dipping frame and an outer-layer pre-dipping groove, the outer-layer pre-dipping groove is fixed on the outer-layer pre-dipping frame and filled with resin, an outer-layer yarn feeding plate is installed on one side of the outer-layer pre-dipping frame, an outer-layer yarn discharging plate is installed on the other side of the outer-layer pre-dipping frame, outer-layer yarns are led out of the outer-layer pre-dipping frame and then penetrate through the outer-layer yarn feeding plate, then enter the pre-dipping plate arranged above the outer-layer pre-dipping groove, the outer-layer yarns penetrate through the outer-layer yarn discharging plate after pre-dipping to squeeze off redundant resin, and then enter the winding forming device.
The inner layer creel comprises an inner layer yarn fixing frame, an inner layer motor is installed on the inner layer yarn fixing frame, the inner layer motor is connected with an inner layer rotating shaft, an inner layer yarn fixing plate is installed and connected on the inner layer rotating shaft, an inner layer roller wheel is fixed on the inner layer yarn fixing plate, and the inner layer roller wheel is used for placing inner layer yarns.
The inner-layer pre-dipping device comprises an inner-layer pre-dipping frame, an inner-layer pre-dipping groove filled with resin is arranged on the inner-layer pre-dipping frame, an inner-layer yarn feeding plate is fixed on one side of the inner-layer pre-dipping frame, an inner-layer yarn discharging plate is installed on the other side of the inner-layer pre-dipping frame, a pre-dipping motor fixing plate is fixed on the inner-layer pre-dipping frame, a pre-dipping gear is installed on the pre-dipping motor fixing plate, pre-dipping motors are installed on two sides of the pre-dipping motor fixing plate, the pre-dipping gear is connected with the pre-dipping motors through a pre-dipping belt, inner-layer yarns are led out of the inner-layer yarn frame, penetrate through the inner-layer yarn feeding plate and then enter the pre-dipping gear, and enter the inner-layer yarns are led out of the pre-dipping gear and then enter the inner-layer yarn discharging plate.
The winding forming device comprises a winding part, a preforming part and a mould part, wherein the winding part is used for manufacturing an arrow shaft winding layer and a spiral layer; the preforming part is used for molding arrow shaft structure, and the mould part is used for carrying out the thermal cure to resin and yarn.
The winding part comprises a mold core fixing cylinder, a mold core is arranged on the mold core fixing cylinder, an inner layer yarn cylinder is arranged on the mold core fixing cylinder through a bearing, inner layer yarn holes are uniformly distributed on the inner layer yarn cylinder and are used for penetrating through inner layer yarns, a yarn cylinder gear is arranged on the inner layer yarn cylinder, the yarn drum gear is connected with the rotating motor through a belt, the inner layer yarn drum is fixed on the sleeve, the sleeve is fixed on a winding fixed cylinder, the winding fixed cylinder is arranged on a winding plate, a connecting bearing is arranged on the winding fixed cylinder, the other end of the connecting bearing is provided with a rotating wheel, the rotating wheel is connected with a motor positioned at the bottom of the winding forming device through a belt, a rotating disc is fixed on the outer side of the rotating wheel, three rotating drums are uniformly distributed on the outer ring of the rotating disc, the other side of each rotating drum is connected with a damper, and the damper is used for controlling the rotating speed of the rotating drum.
The winding yarn guide device is characterized in that a winding yarn guide device is further fixed on the rotary table and comprises a yarn inlet guide port, a winding yarn rotating wheel and a yarn outlet guide port, the yarn inlet guide port, the winding yarn rotating wheel and the yarn outlet guide port are sequentially fixed on the yarn guide device rod, and winding yarns coming out of a winding yarn coil sequentially pass through the yarn inlet guide port, the winding yarn rotating wheel and the yarn outlet guide port and are finally wound on the mold core.
The preforming part comprises a preforming fixing frame, a fixed bottom plate is arranged on the preforming fixing frame, and a preforming device and a forming die are arranged on the fixed bottom plate; the preforming device comprises two preforming supports fixed on the fixed base plate, a preforming vertical screw rod is fixed on each preforming support, a preforming block is fixed on each preforming vertical screw rod, a preforming transverse screw rod is connected onto each preforming block, a preforming plate is fixed on each preforming transverse screw rod, and the position of each preforming plate is adjusted by adjusting the preforming transverse screw rod and the preforming vertical screw rod.
The mould part comprises an outer mould, the outer mould is arranged at the position of the forming mould, a yarn guide is arranged at the front end of the outer mould, yarns enter the outer mould after passing through the yarn guide and are heated and cured in the outer mould.
Draw cutting device includes arrow shaft punch holder and arrow shaft lower plate, the arrow shaft punch holder is fixed on the punch holder fixed block, the arrow shaft lower plate is fixed on the lower plate fixed block, pneumatic cylinder piston rod is connected to the lower plate fixed block, the pneumatic cylinder is installed on the pneumatic cylinder fixed plate, punch holder fixed plate and pneumatic cylinder fixed plate are all fixed on two risers, the arrow shaft punch holder is used for centre gripping arrow shaft.
The riser top is fixed with a diaphragm, be fixed with the cutting cylinder on the diaphragm and fill the pneumatic cylinder, the cutting cylinder is connected with the cutting motor, be fixed with the blade on the cutting motor for the cutting arrow shaft, it fills the pneumatic cylinder to be fixed with the second on the pneumatic cylinder to fill, be fixed with the filler rod on the second fills the pneumatic cylinder, the filler rod is used for drawing the in-process and stretches into the arrow shaft inner wall, the riser is fixed on the slide, the slide passes through the slider to be fixed on slide bar and lead screw, lead screw one end is connected with traction motor, traction motor fixes on drawing the cutting mount, traction motor is used for drawing the arrow shaft and removes.
The tension gun is adopted to control the tension of the yarn, so that the good straightness and roundness of the drawn and extruded arrow shaft are ensured, the winding force of the winding yarn is used for driving the inner layer yarn to rotate, the inner layer spiral structure is manufactured, the middle layer winding structure is used for enhancing the radial bearing force of the arrow shaft, the filling rod is used for filling the inner wall of the arrow shaft in the arrow shaft drawing process, the arrow shaft is prevented from being flattened by the drawing device, no waste is generated in the whole production process, the method is safe and environment-friendly, the production efficiency is high, and the method is particularly suitable for producing thin-wall arrow shafts.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of an outer creel configuration of the present invention;
FIG. 3 is a schematic view of the outer prepreg device of the present invention;
FIG. 4 is a schematic view of an inner creel configuration of the present invention;
FIG. 5 is a schematic view of the inner pre-dip apparatus of the present invention;
FIG. 6 is a schematic structural diagram of a winding device according to the present invention;
FIG. 7 is a schematic view of the winding part of the winding device of the present invention;
figure 8 is a schematic view of the winding yarn guide configuration of the present invention;
FIG. 9 is a schematic view of the construction of a preforming tool according to the invention;
FIG. 10 is a schematic view of the drag cutting apparatus of the present invention;
FIG. 11 is a schematic view of a three-layer structure of an arrow shaft of the present invention.
Detailed Description
For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
As shown in fig. 1-11, the present invention discloses a composite arrow shaft production apparatus, which is mainly used for manufacturing arrow shafts having a three-layer structure, wherein the three-layer structure mainly refers to three layers of yarn structures arranged in different manners, and mainly includes an inner layer spiral structure 501, a middle layer winding structure 502 and an outer layer vertical axial structure 503. The equipment mainly comprises an outer layer creel 1, an outer layer pre-soaking device 2, an inner layer creel 6, an inner layer pre-soaking device 7, a winding forming device 3 and a traction cutting device 4, which form a production line together. The outer layer creel 1 is used for placing an outer layer yarn ball and controlling the tension of the led-out outer layer yarn; the outer-layer pre-dipping frame 2 is mainly used for dipping the outer-layer yarns; the inner layer creel 6 is used for placing inner layer yarns required by the pulling and winding and enabling the inner layer yarns to integrally rotate; the inner-layer pre-soaking device 7 is arranged right in front of the inner-layer creel 6 and is used for pre-soaking inner-layer yarns; the winding forming device 3 mainly winds the inner layer yarn and heats and solidifies the yarn resin; the traction cutting device 4 mainly pulls the pultruded arrow shaft to cut according to the size requirement.
As shown in fig. 2, the outer creel 1 includes an outer yarn fixing frame 101, a plurality of sets of outer rollers 102 are fixed on the outer yarn fixing frame 101, a tension gun 103 is fixed right above each set of outer rollers 102, the tension gun provides adjustable constant tension for the yarn through three sets of pulleys, and the tension gun is a known device and is not described herein again. The outer yarn creel outputs outer yarn outwards.
As shown in fig. 3, the outer prepreg device 2 includes an outer prepreg fixing frame 201, an outer prepreg groove 203 is arranged in the outer prepreg fixing frame 201, the outer prepreg groove is filled with resin, an outer yarn feeding plate 202 is fixed on one side of the outer prepreg fixing frame 201, an outer yarn discharging plate 206 is fixed on the other side of the outer prepreg fixing frame 201, a plurality of porcelain eyes 207 through which outer yarns pass are arranged on the outer yarn discharging plate 206, the outer yarns are led out from the outer yarn frame 1 and then pass through the outer yarn feeding plate 202, and then enter a prepreg plate 204 fixed above the outer prepreg groove 203, the outer prepreg groove 203 is fixed on the outer prepreg fixing frame 201, a screw is arranged on the prepreg plate 204, the screw is connected with the outer prepreg fixing frame 201 and locked by a nut 205, the height position of the prepreg plate 204 can be adjusted by adjusting the nut 205, the outer yarns pass through the prepreg plate 204, are impregnated with resin in the prepreg groove and then pass through the porcelain eyes 207 of the outer yarn discharging plate 206, the excess resin is squeezed out, and then the outer layer yarn pre-impregnated with the resin enters the winding forming device 3. The outer layer pre-dipping device is mainly used for pre-dipping resin on the outer layer yarns, so that the resin is attached to the outer layer yarns.
As shown in fig. 4, the inner creel 6 includes an inner yarn fixing frame 601, the inner yarn fixing frame 601 is provided with an inner motor 602, a transmission shaft of the inner motor 602 is connected with a master gear, the master gear is engaged with a slave gear, the slave gear is connected with an inner rotating shaft 603, the other side of the inner rotating shaft 603 is provided with an inner yarn fixing plate 604, the inner yarn fixing plate 604 is fixed with a plurality of inner rollers 605, the plurality of inner rollers are circumferentially arranged, and the inner rollers 605 are used for placing inner yarns. The inner layer spindle is fixed to two spindle supports 606. The inner layer motor drives the two gears to rotate, so that the inner layer rotating shaft is driven to rotate, the inner layer rotating shaft drives the inner layer yarn fixing plate to rotate, and the inner layer roller wheel rotates along with the inner layer yarn fixing plate, so that the inner layer yarns can be integrally conveyed in a rotating mode, and the inner layer spiral structure is convenient to form.
As shown in fig. 5, the inner prepreg device 7 includes an inner prepreg frame 701, an inner prepreg slot 706 is provided on the inner prepreg frame 701, the inner prepreg slot 706 is used for filling resin, an inner yarn feeding plate 702 is fixed on one side of the inner prepreg frame 701, an inner yarn discharging plate 707 is fixed on the other side of the inner prepreg frame 701, holes for inner yarns to pass through are provided on both the inner yarn feeding plate 702 and the inner yarn discharging plate 707, a prepreg motor fixing plate 704 is fixed on the inner prepreg frame 701, a prepreg gear 703 is installed on the prepreg motor fixing plate 704, a prepreg motor 705 is provided on one side of the prepreg motor fixing plate 704, a transmission shaft of the prepreg motor 705 is connected with the prepreg gear 703 through a belt, and the prepreg gear is driven to rotate by the operation of the prepreg motor. The inner layer yarn is led out from the inner layer creel 6, enters the hole on the inner layer yarn inlet plate 702, then enters the pre-soaking gear 703, is soaked with resin in the inner layer pre-soaking groove, and then comes out from the pre-soaking gear and enters the inner layer yarn outlet plate 707. Because the pre-impregnated gear rotates, the inner layer yarn can be ensured to be always in a rotating state. The inner layer pre-dipping device mainly plays a role of pre-dipping resin for the inner layer yarn, so that the resin is attached to the inner layer yarn.
As shown in fig. 6-9, the winding forming device 3 includes a mold core fixing cylinder 301, a mold core 302 is fixed on the mold core fixing cylinder 301, the mold core 302 sequentially passes through the mold core fixing cylinder 301, a preforming plate 3165 enters an outer mold 325, an inner yarn cylinder 3011 is installed outside the mold core fixing cylinder 301 through a bearing, a circle of inner yarn holes are uniformly distributed on the inner yarn cylinder 3011, the inner yarn holes are used for passing inner yarns, the inner yarn cylinder 3011 is fixed on the sleeve 303, a rotating gear 3012 is fixed on the inner yarn cylinder 3011, and the rotating gear 3012 is connected with a belt wheel on a rotating motor 3013 through a belt; the rotating electrical machines are installed on a rotating electrical machine fixing plate 3051, the sleeve 303 is installed on a winding fixing barrel 304, the winding fixing barrel 304 is installed on a winding plate 305, the winding plate 305 is installed on a winding forming fixing frame 306, the rotating electrical machine fixing plate 3051 is installed above the winding plate 305, a fixing barrel cover plate 3014 is installed on the die core fixing barrel 301, the fixing barrel cover plate 3014 is mainly used for placing the die core fixing barrel 301, the die core fixing barrel 301 is enabled to follow an inner-layer yarn barrel 3011 to rotate synchronously, and the fixing cover plate is connected with the winding plate through screws. The rotating motor 3013 drives the rotating gear 3012 to rotate, the rotating gear 3012 drives the inner-layer yarn drum 3011 to rotate, and the fixed cylinder 301 of the mold core is installed with the inner-layer yarn drum 3011 through a bearing, so that the fixed cylinder 301 of the mold core also rotates along with the rotation.
Two bearings 307 are fixed on the winding fixing cylinder 304, a rotating wheel 308 is fixed on the outer ring of each bearing 307, the rotating wheel 308 is connected with a winding motor 310 through a belt 309, the winding motor 310 is fixed at the bottom of the winding forming fixing frame 306, and the rotating wheel 308 is driven to rotate through the winding motor 310; a rotating disc 311 is fixed on the outer side of the rotating wheel 308, three rotating drums 312 are uniformly distributed on the outer ring of the rotating disc 311, the rotating drums 312 are used for placing winding yarn balls, the other side of each rotating drum 312 is connected with a damper 313, the damper 313 is fixed on the rotating disc 311, and the damper 313 controls the rotating speed of the rotating drums 312. In the winding process, along with the rotation of the turntable 311, the speed of the winding yarn ball is different when the winding yarn ball is in different positions under the influence of gravity, and meanwhile, along with the production process, the winding yarn ball is continuously reduced in use and also influences the winding speed, and the damper 313 mainly controls the winding speed to be unaffected when the conditions are changed, so that the constant winding speed is ensured. The rotary disc 311 is further fixed with a winding yarn guide 314, the winding yarn guide 314 comprises a yarn inlet guide port 3141, a winding yarn rotating wheel 3142 and a yarn outlet guide port 3143, the yarn inlet guide port 3141, the winding yarn rotating wheel 3142 and the yarn outlet guide port 3143 are sequentially fixed on a yarn guide rod 3144, winding yarns coming out of a winding yarn clew sequentially pass through the yarn inlet guide port 3141, the winding yarn rotating wheel 3142 and the yarn outlet guide port 3143 and are finally wound on the mold core 302, the winding yarn guide 314 mainly ensures that the winding position is fixed, and the winding process cannot change along with the position of the yarns on the yarn clew. This part is mainly the output winding yarn.
After the inner layer yarn passes through the inner layer yarn barrel 301, the inner layer yarn barrel rotates along with the winding motor 3013 to drive the inner layer yarn to rotate spirally along the mold core 302, the winding yarn can wind the inner layer yarn on the mold core 302, meanwhile, redundant resin on the inner layer yarn can also impregnate the winding yarn, and resin is ensured to be arranged on all the yarns.
A fixed bottom plate 315 is arranged on the preforming fixed frame 306, and a preforming device 316 and a forming die 317 are arranged on the fixed bottom plate 315; the preforming device 316 comprises two preforming supports 3161 fixed on the fixed bottom plate 315, a preforming vertical screw 3162 is fixed on the preforming supports 3161, a preforming block 3163 is fixed on the preforming vertical screw 3162, a preforming transverse screw 3164 is connected on the preforming block 3163, a preforming plate 3165 is fixed on the preforming transverse screw 3164, and the position of the preforming plate 3165 can be adjusted by adjusting the screws.
The novel yarn guide device is characterized in that a forming die 317 is fixed on the fixed base plate 315, the forming die 317 is connected with the fixed base plate 315 through a support 319, a vertical screw rod 320 is fixed in the support 319, a forming connecting piece 321 is fixed above the vertical screw rod 320, a cross screw rod 322 is connected onto the forming connecting piece 321, a lower die 323 is fixed on the cross screw rod 322, an upper die 324 is arranged on the lower die 323, an outer die 325 is placed between the upper die and the lower die, the outer die 325 is used for forming an arrow rod, heating rods are installed in the upper die and the lower die and used for heating the outer die 325, a yarn guide 326 is placed at the front end of the outer die 325, and main yarns of the yarn guide 326 are guided secondarily. And heating the outer die by utilizing the heating of the upper die and the lower die, so that the resin-presoaked yarns entering the outer die are cured and molded. A drying channel 327 is arranged in the outer mold and used for drying the arrow shaft.
The wound inner layer yarn and the wound yarn together extrude excessive resin through the pre-forming device 316, the outer layer yarn enters the hole position on the pre-forming plate 3165 after passing through the outer layer yarn outlet plate 206, the two groups of outer layer creels and the outer layer pre-forming device are symmetrically fixed on the two sides of the winding forming device respectively to ensure that the tension of the outer layer yarn on the left side of the outer mold 325 is the same as that of the outer layer yarn on the right side of the outer mold 325, and then all the yarns (the outer layer yarn, the inner layer yarn and the wound yarn) pass through the yarn guide 326 and enter the outer mold 325 to start heating and curing. Come out from the external mold 325 other end after resin and yarn solidification, for guaranteeing that the arrow shaft cooling is even, the arrow shaft can get into after leaving external mold 325 and inlay in drying tunnel 327 on the external mold, drying tunnel 327 receives mould and bed die intensification heat-conduction, need not independent heating, drying tunnel 327 other end is placed and is dried tunnel extension board 328 on, drying tunnel extension board 328 is installed on PMKD 315. After curing, an arrow shaft comprising a three-layer structure has been formed.
As shown in fig. 10, the traction cutting device 4 includes a traction fixing frame 401, a traction motor 402 is installed on the traction fixing frame 401, the traction motor 402 is used for drawing a arrow shaft to move, the traction motor 402 is connected with a lead screw 403, the lead screw 403 is fixed on a front support 404, two ends of the front support 404 are fixed with a slide rod 405, the other ends of the lead screw 403 and the slide rod 405 are fixed on a rear support 406, the front support 404 and the rear support 406 are both installed on the traction fixing frame 401, the lead screw 403 is connected with a movable lead screw slider 407, the lead screw slider 407 is installed with a slider plate 408, two ends of the slider plate 408 are fixed with two sliders 409, the slider 409 is connected on a slider plate 410, the slider plate 408 is fixed with two risers 411, the riser 411 is fixed with a hydraulic cylinder fixing plate 412, the hydraulic cylinder fixing plate 412 is installed with a hydraulic cylinder 413, install down clamp splice fixed plate 414 on the pneumatic cylinder 413 piston rod, install down clamp splice 415 of arrow shaft on the clamp splice fixed plate 414 down, be fixed with clamp splice fixed plate 416 on the riser 411, install clamp splice 417 on the arrow shaft on the clamp splice fixed plate 416, clamp splice and arrow shaft clamp splice down are used for pressing from both sides the arrow shaft and pull and extrude on the arrow shaft. Riser 411 top is fixed with a diaphragm 418, be fixed with cutting cylinder 419 and fill cylinder 420 on diaphragm 418, cutting cylinder 419 is connected with cutting motor 421, be fixed with blade 422 on the cutting motor 421 for the cutting arrow shaft, it is fixed with second filling cylinder 423 to fill cylinder 420, second filling cylinder 423 is fixed with filling rod 424, filling rod 424 stretches into the arrow shaft inner wall at the drive of second filling cylinder 423 under the traction process, prevents to lead to traction in-process pneumatic cylinder 413 to press from both sides flat arrow shaft because the arrow shaft arm is too thin.
In the traction device, a traction motor 402 drives a screw rod 403 to rotate, so that a screw rod sliding block 407 moves on the screw rod, a hydraulic cylinder 413 is driven to move together to change the position, and then the gap between a lower clamping block of an arrow shaft and an upper clamping block of the arrow shaft is adjusted through the hydraulic cylinder, so that the clamping control of the arrow shaft is realized. The cutting motor drives the blade to cut the arrow shaft.
The invention also provides a production method of the arrow shaft made of the composite material, which comprises the following steps:
the method comprises the following steps that firstly, outer layer yarn ball yarns fixed on inner and outer layer creel rollers are led out, the outer layer yarns are led out from a pulley on the upper portion of a tension gun after passing through the tension gun, the outer layer yarns obtain constant tension, and the inner layer yarns directly enter an inner layer yarn pre-soaking device.
And step two, the outer layer yarns enter an outer layer pre-dipping device and sequentially pass through an outer layer yarn inlet plate and an outer layer pre-dipping groove, after the outer layer yarns are discharged from the yarn plate, the outer layer yarns can be squeezed by porcelain eyes on the outer layer yarn outlet plate to remove redundant resin, then the outer layer yarns enter a pre-forming device on a winding forming device, the inner layer yarns enter the inner layer pre-dipping device and then sequentially pass through an inner layer yarn inlet plate and a pre-dipping gear, and after the inner layer yarns are discharged from the yarn plate, the inner layer yarns enter the winding forming device.
And step three, the inner layer yarn enters an inner layer yarn drum of the winding forming device, each inner layer yarn is uniformly distributed around the mold core, the inner layer yarn is wound by the winding yarn led out from the drum after passing through the inner layer yarn drum, the inner layer yarn starts to rotate along the mold core under the influence of the rotating motor, the winding yarn and the inner layer yarn are fixed on the mold core together, and the inner layer yarn is formed on the surface of the mold core in a spiral mode and is of a spiral structure of the inner layer, so that the inner layer yarn and the winding yarn are tightly fastened on the mold core. Then the winding yarn is wound on the inner layer yarn again to form a winding structure of the middle layer.
And fourthly, the winding yarns and the inner layer yarns are fixed together and then enter a preforming device together with the outer layer yarns, the outer layer yarns are arranged on the surfaces of the winding yarns in a vertical axial direction, redundant resin on the inner layer yarns and the winding yarns which are fixed on the mold core is extruded at the moment, all the yarns pass through a yarn guide and then enter an outer mold, after the yarns and the resin are heated and formed in the outer mold, a three-layer compact structure is formed, namely an inner layer spiral structure, a middle layer winding structure and an outer layer vertical axial structure, the three layers are different yarn arrangement modes, arrow shafts are jointly formed, the outer layer vertical axial structure is arranged along the axial direction of the arrow shafts, and the arrow shafts come out of the outer mold and enter a drying tunnel.
And step five, the arrow shaft is cooled from the drying tunnel and then enters a traction cutting device, firstly, a hydraulic cylinder starts to move to drive a lower clamping block to move upwards, the arrow shaft is slightly locked by an upper clamping block, a cutting cylinder drives a cutting motor to cut off the arrow shaft in front, the cut arrow shaft is taken away manually, then, the cutting motor and the cutting cylinder reset, a filling cylinder drives a second filling cylinder downwards to move, the second cylinder drives a filling rod to move forwards, the filling rod enters the arrow shaft, the hydraulic cylinder completely holds the arrow shaft tightly, then, the traction motor drives the arrow shaft to move integrally, the arrow shaft is pulled out, after a certain distance is pulled out, the hydraulic cylinder resets after the filling cylinder resets, and finally, the traction motor resets. A reciprocating cycle is started.
Although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications, equivalents, improvements, and the like can be made in the technical solutions of the foregoing embodiments or in some of the technical features of the foregoing embodiments, but those modifications, equivalents, improvements, and the like are all within the spirit and principle of the present invention.
Claims (13)
1. A method for producing an arrow shaft made of composite materials is characterized by comprising the following steps:
leading out outer layer yarns through a tension gun, enabling the outer layer yarns to have constant tension by using the tension gun, and enabling inner layer yarns to enter an inner layer pre-dipping device for pre-dipping resin;
secondly, the outer layer yarns enter an outer layer pre-dipping device for pre-dipping resin, then redundant tree fingers on the outer layer yarns are squeezed out, and then the outer layer yarns are sent to a pre-forming device on a winding forming device;
conveying the inner layer yarn in a rotating manner, winding and forming the inner layer yarn on the surface of the mold core in a spiral manner to form an inner layer spiral structure, and winding the inner layer yarn by winding yarn to form a middle layer winding structure so that the inner layer yarn is tightly formed on the mold core;
step four, the winding yarns and the inner layer yarns are fixed together and then enter a preforming device together with the outer layer yarns, the outer layer yarns are arranged on the surfaces of the winding yarns in a vertical axial direction to form an outer layer vertical axial structure, the inner layer yarns fixed on a mold core and redundant resin on the winding yarns are extruded at the moment, all the yarns pass through a yarn guide and then enter an outer mold, the yarns are heated, cured and formed, and then the arrow shaft is output and sent into a drying tunnel;
and step five, the arrow shaft is cooled from the drying tunnel and then enters a traction cutting device, firstly, a hydraulic cylinder starts to move to drive a lower clamping block to move upwards, the arrow shaft is slightly locked by an upper clamping block, a cutting cylinder drives a cutting motor to cut off the arrow shaft in front, the cut arrow shaft is taken away manually, then, the cutting motor and the cutting cylinder reset, a filling cylinder drives a second filling cylinder downwards to move, the second cylinder drives a filling rod to move forwards, the filling rod enters the arrow shaft, the hydraulic cylinder completely holds the arrow shaft tightly, then, the traction motor drives the arrow shaft to move integrally, the arrow shaft is pulled out, after a certain distance is pulled out, the hydraulic cylinder resets after the filling cylinder resets, and finally, the traction motor resets. A reciprocating cycle is started.
2. The composite material arrow shaft production equipment is mainly used for manufacturing arrow shafts with three-layer structures and is characterized in that the arrow shafts with three-layer structures comprise spiral structures of an inner layer, winding structures of a middle layer and vertical axial structures of an outer layer;
the outer layer creel is used for placing an outer layer yarn ball, controlling the tension of the led-out outer layer yarn and leading out the outer layer yarn;
the outer-layer pre-dipping device is arranged right in front of the outer-layer creel and is used for pre-dipping resin on the outer-layer yarns; the outer-layer creel and the outer-layer pre-dipping device are arranged in two groups and are arranged on two sides of the winding device;
the inner layer creel is used for placing inner layer yarns required by the pulling and winding and enabling the inner layer yarns to integrally rotate;
the inner-layer pre-soaking device is arranged right in front of the inner-layer creel and is used for pre-soaking the inner-layer yarns and controlling the rotation of the inner-layer yarns;
the winding forming device is arranged right in front of the inner-layer pre-soaking device and is used for winding and heating and curing the yarns;
and the traction cutting device is arranged right in front of the winding forming device and is used for drawing the pultruded arrow shaft and cutting the arrow shaft according to a set size.
3. The composite arrow shaft production equipment according to claim 1, wherein the outer layer creel comprises an outer layer yarn fixing frame, a plurality of groups of outer layer rollers and tension guns are arranged on the outer layer yarn fixing frame, and the tension guns are fixed right above each group of outer layer rollers.
4. The composite arrow shaft production equipment according to claim 1, wherein the outer layer pre-dipping device comprises an outer layer pre-dipping frame and an outer layer pre-dipping groove, the outer layer pre-dipping groove is fixed on the outer layer pre-dipping frame and filled with resin, an outer layer yarn inlet plate is installed on one side of the outer layer pre-dipping frame, an outer layer yarn outlet plate is installed on the other side of the outer layer pre-dipping frame, outer layer yarns are led out from the outer layer pre-dipping frame and then penetrate through the outer layer yarn inlet plate, then enter the pre-dipping plate arranged above the outer layer pre-dipping groove, and after pre-dipping, the outer layer yarns penetrate through the outer layer yarn outlet plate to squeeze off excess resin, and then enter the winding forming device.
5. The composite arrow shaft production equipment according to claim 1, wherein the inner creel comprises an inner yarn fixing frame, an inner motor is mounted on the inner yarn fixing frame and connected with an inner rotating shaft, an inner yarn fixing plate is mounted and connected with the inner rotating shaft, and inner rollers are fixed on the inner yarn fixing plate and used for placing inner yarns.
6. The apparatus for producing an arrow shaft made of composite materials according to claim 1, wherein the inner-layer pre-dipping device comprises an inner-layer pre-dipping frame, an inner-layer pre-dipping groove filled with resin is arranged on the inner-layer pre-dipping frame, an inner-layer yarn feeding plate is fixed on one side of the inner-layer pre-dipping frame, an inner-layer yarn discharging plate is arranged on the other side of the inner-layer pre-dipping frame, a pre-dipping motor fixing plate is fixed on the inner-layer pre-dipping frame, a pre-dipping gear is arranged on the pre-dipping motor fixing plate, pre-dipping motors are arranged on two sides of the pre-dipping motor fixing plate, the pre-dipping gear and the pre-dipping motors are connected through a pre-dipping belt, inner-layer yarns are led out of the inner-layer pre-dipping frame, then pass through the inner-layer yarn feeding plate and enter the pre-dipping gear, and inner-layer yarns are led out of the pre-dipping gear and then enter the inner-layer yarn discharging plate.
7. The composite arrow shaft production equipment according to claim 1, wherein the winding forming device comprises a winding part, a preforming part and a mould part, and the winding part is used for manufacturing an arrow shaft winding layer and a spiral layer; the preforming part is used for molding arrow shaft structure, and the mould part is used for carrying out the thermal cure to resin and yarn.
8. The composite arrow shaft production equipment according to claim 7, wherein the winding part comprises a core fixing cylinder, a core is placed on the core fixing cylinder, an inner layer yarn cylinder is installed on the core fixing cylinder through a bearing, inner layer yarn holes are uniformly arranged on the inner layer yarn cylinder and used for penetrating inner layer yarns, a yarn cylinder gear is installed on the inner layer yarn cylinder and connected with a rotating motor through a belt, the inner layer yarn cylinder is fixed on a sleeve, the sleeve is fixed on the winding fixing cylinder, the winding fixing cylinder is installed on a winding plate, a connecting bearing is installed on the winding fixing cylinder, a rotating wheel is installed at the other end of the connecting bearing, the rotating wheel is connected with a motor positioned at the bottom of the winding forming device through a belt, a rotating disc is fixed on the outer side of the rotating wheel, and three rotating cylinders are uniformly distributed on the outer ring of the rotating disc, the other side of the rotating drum is connected with a damper, and the damper is used for controlling the rotating speed of the rotating drum.
9. The composite arrow shaft production equipment according to claim 8, characterized in that, still be fixed with the winding yarn director on the carousel, the winding yarn director includes into yarn direction mouth and winding yarn runner and play yarn direction mouth, should advance yarn direction mouth and winding yarn runner and play yarn direction mouth and fix on the wire guide pole in proper order, and the winding yarn that comes out from winding yarn clew passes through into yarn direction mouth, winding yarn runner and play yarn direction mouth in proper order, finally twines on the mold core.
10. The composite arrow shaft manufacturing apparatus of claim 9, wherein said pre-forming portion includes a pre-forming fixture, a fixing base plate is mounted on said pre-forming fixture, and a pre-forming device and a forming mold are mounted on said fixing base plate; the preforming device comprises two preforming supports fixed on the fixed base plate, a preforming vertical screw rod is fixed on each preforming support, a preforming block is fixed on each preforming vertical screw rod, a preforming transverse screw rod is connected onto each preforming block, a preforming plate is fixed on each preforming transverse screw rod, and the position of each preforming plate is adjusted by adjusting the preforming transverse screw rod and the preforming vertical screw rod.
11. The composite arrow shaft production equipment according to claim 10, wherein the mould part comprises an outer mould, the outer mould is arranged at the position of the forming mould, the front end of the outer mould is provided with a yarn guide, yarns enter the outer mould after passing through the yarn guide, and the yarns are heated and solidified in the outer mould.
12. The composite material arrow shaft production facility of claim 1, characterized in that, pull cutting device and include arrow shaft punch holder and arrow shaft lower plate, the arrow shaft punch holder is fixed on the punch holder fixed block, the arrow shaft lower plate is fixed on the lower plate fixed block, the pneumatic cylinder piston rod is connected to the lower plate fixed block, the pneumatic cylinder is installed on the pneumatic cylinder fixed plate, punch holder fixed plate and pneumatic cylinder fixed plate all fix on two risers, arrow shaft punch holder is used for the centre gripping arrow shaft.
13. The composite material arrow shaft production facility of claim 12, wherein, the riser top is fixed with a diaphragm, be fixed with cutting cylinder and packing cylinder on the diaphragm, cutting cylinder is connected with the cutting motor, be fixed with the blade on the cutting motor for the cutting arrow shaft, be fixed with the second on the packing cylinder and pack the cylinder, be fixed with the packing rod on the second packing cylinder, the packing rod is used for drawing the in-process and stretches into the arrow shaft inner wall, the riser is fixed on the slide, the slide passes through the slider to be fixed on slide bar and lead screw, lead screw one end is connected with traction motor, traction motor fixes on drawing the cutting mount, traction motor is used for drawing the arrow shaft and removes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111089496.0A CN113799411A (en) | 2021-09-16 | 2021-09-16 | Method and equipment for producing arrow shaft made of composite material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111089496.0A CN113799411A (en) | 2021-09-16 | 2021-09-16 | Method and equipment for producing arrow shaft made of composite material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113122998A (en) * | 2021-03-29 | 2021-07-16 | 南京玻璃纤维研究设计院有限公司 | Continuous parallel traction method and traction device |
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2021
- 2021-09-16 CN CN202111089496.0A patent/CN113799411A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113122998A (en) * | 2021-03-29 | 2021-07-16 | 南京玻璃纤维研究设计院有限公司 | Continuous parallel traction method and traction device |
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