A production method and equipment for a composite material arrow shaft

Abstract

A production method and equipment for a composite material arrow shaft, mainly used for manufacturing a three-layer structure arrow shaft. The equipment includes an outer layer yarn rack, an outer layer pre-impregnation device, an inner layer yarn rack, an inner layer pre-impregnation device, a winding and forming device, and a traction and cutting device; the outer layer pre-impregnation device is installed directly in front of the outer layer yarn rack and is mainly used for pre-impregnating the yarn with resin; two groups of outer layer pre-impregnation devices and the outer layer yarn rack are placed on both sides of the winding and forming device; the inner layer yarn rack is used for placing yarn bobbins and controlling the rotation of the yarn; the inner layer pre-impregnation device is installed directly in front of the inner layer yarn rack and is mainly used for pre-impregnating the yarn with resin and controlling the rotation of the yarn at the same time; the winding and forming device is installed directly in front of the inner layer pre-impregnation device and is mainly used for winding and heating and curing the yarn; the traction and cutting device is installed directly in front of the winding and forming device and is mainly used for traction and cutting the extruded arrow shaft. The present invention has low manufacturing cost, reduces waste during the production process, is safe, environmentally friendly, and is suitable for the production of thin-walled arrow shafts.

Description

Technical Field

[0001] The present invention relates to a production method and equipment for a composite material arrow shaft, specifically a multi-layer pultrusion winding production method and equipment for a composite material thin-walled arrow shaft. Background Art

[0002] The arrow shaft is the main body of making an arrow. An arrow is a consumable in the process of using a crossbow or a bow. With the continuous increase of the crossbow or bow poundage, the requirements for the arrow are also constantly increasing. The outer diameter of the arrow shaft is generally relatively small. To achieve a higher arrow speed, the arrow must be very light and the arrow shaft wall must be very thin; to improve the shooting accuracy, the arrow is required to have a very high straightness and roundness; at the same time, the arrow cannot burst due to contacting the target after shooting, which requires the arrow shaft to have a certain radial load-bearing capacity.

[0003] The existing arrow shaft equipment mainly focuses on rolling. After rolling out the arrow shaft with rollers, the excess thickness on the surface of the arrow shaft is removed by a lathe to meet the required straightness and roundness of the arrow shaft. Currently, when using pultrusion to produce arrow shafts, due to unstable tension control, the straightness of the pultruded arrow shafts is unstable. At the same time, affected by the requirement of thin wall thickness, the arrow shafts are easily flattened during the traction process. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a production equipment for composite material arrow shafts.

[0005] To solve the above technical problem, the present invention adopts the following technical solutions:

[0006] A production method for a composite material arrow shaft, comprising the following steps:

[0007] Step 1: Lead out the outer layer yarn through a tension gun, and use the tension gun to make the outer layer yarn have a constant tension. The inner layer yarn enters the inner layer pre-impregnation device to pre-impregnate resin.

[0008] Step 2: The outer layer yarn enters the outer layer pre-impregnation device to pre-impregnate resin, then squeeze out the excess resin on the outer layer yarn, and then send the outer layer yarn into the pre-forming device on the winding forming device.

[0009] Step 3: Rotate and convey the inner layer yarn and wind it in a spiral manner on the surface of the mandrel to form an inner layer spiral structure, and then wind it with winding yarn to form a middle layer winding structure, so that the inner layer yarn is tightly formed on the mandrel.

[0010] Step 4: After the winding yarn and the inner layer yarn are fixed together, they enter the pre-forming device together with the outer layer yarn. The outer layer yarn is arranged in a vertical axial direction on the surface of the winding yarn to form an outer layer vertical axial structure. At this time, squeeze out the excess resin on the inner layer yarn and the winding yarn fixed on the mandrel. Then all the yarns enter the outer mold through the yarn guide, and after being heated and cured and formed, the arrow shaft is output. The arrow shaft is sent into the baking channel.

[0011] Step Five: After the arrow shaft comes out of the drying tunnel and cools down, it will enter the traction and cutting device. First, the hydraulic cylinder starts to move, driving the lower clamping block to move upward. After slightly locking the arrow shaft with the upper clamping block, the cutting cylinder drives the cutting motor to cut off the front part of the arrow shaft. The cut-off arrow shaft is taken away by the operator. Then, the cutting motor and the cutting cylinder reset. The filling cylinder drives the second filling cylinder to move downward, and the second cylinder drives the filling rod to move forward. The filling rod enters the interior of the arrow shaft, and the hydraulic cylinder fully clamps the arrow shaft. Then, the traction motor drives the entire arrow shaft to move and pulls out the arrow shaft. After pulling out a certain distance, the filling cylinder resets and then the hydraulic cylinder resets. Finally, the traction motor resets. The cycle starts again.

[0012] A production device for composite material arrow shafts, mainly used for manufacturing arrow shafts with a three-layer structure. The three-layer structure arrow shaft includes a spiral structure in the inner layer, a winding structure in the middle layer, and a vertical axial structure in the outer layer. The device includes an outer layer yarn rack, an outer layer pre-impregnation device, an inner layer yarn rack, an inner layer pre-impregnation device, a winding and forming device, and a traction and cutting device;

[0013] The outer layer yarn rack is used to place the outer layer yarn bobbins and control the tension of the drawn outer layer yarn, and draw out the outer layer yarn;

[0014] The outer layer pre-impregnation device is installed directly in front of the outer layer yarn rack and is used to pre-impregnate the outer layer yarn with resin; two sets of the outer layer yarn rack and the outer layer pre-impregnation device are provided and placed on both sides of the winding and forming device;

[0015] The inner layer yarn rack is used to place the inner layer yarn required for winding and pulling and make the inner layer yarn rotate as a whole;

[0016] The inner layer pre-impregnation device is placed directly in front of the inner layer yarn rack and is used to pre-impregnate the inner layer yarn and control the rotation of the inner layer yarn at the same time;

[0017] The winding and forming device is installed directly in front of the inner layer pre-impregnation device and is used to wind and heat-cure the yarn;

[0018] The traction and cutting device is installed directly in front of the winding and forming device and is used to traction the extruded arrow shaft and cut the arrow shaft according to the set size.

[0019] The outer layer yarn rack includes an outer layer yarn fixing rack, and a number of groups of outer layer rollers and tension guns are installed on the outer layer yarn fixing rack. The tension guns are fixed directly above each group of outer layer rollers.

[0020] The outer layer pre - impregnation device includes an outer layer pre - impregnation rack and an outer layer pre - impregnation tank. The outer layer pre - impregnation tank is fixed on the outer layer pre - impregnation rack and filled with resin. On one side of the outer layer pre - impregnation rack, an outer layer yarn inlet plate is installed, and on the other side, an outer layer yarn outlet plate is installed. The outer layer yarn is led out from the outer layer yarn rack, passes through the outer layer yarn inlet plate, then enters the pre - impregnation plate placed above the outer layer pre - impregnation tank. After pre - impregnation, the outer layer yarn passes through the outer layer yarn outlet plate to squeeze out the excess resin, and then enters the winding and forming device.

[0021] The inner layer yarn rack includes an inner layer yarn fixing rack. An inner layer motor is installed on the inner layer yarn fixing rack. The inner layer motor is connected to an inner layer rotating shaft. The inner layer rotating shaft is installed and connected to an inner layer yarn fixing plate. Inner layer rollers are fixed on the inner layer yarn fixing plate, and the inner layer rollers are used to place the inner layer yarn.

[0022] The inner layer pre - impregnation device includes an inner layer pre - impregnation rack. An inner layer pre - impregnation tank filled with resin is installed on the inner layer pre - impregnation rack. On one side of the inner layer pre - impregnation rack, an inner layer yarn inlet plate is fixed, and on the other side, an inner layer yarn outlet plate is installed. A pre - impregnation motor fixing plate is fixed on the inner layer pre - impregnation rack. A pre - impregnation gear is installed on the pre - impregnation motor fixing plate. Pre - impregnation motors are installed on both sides of the pre - impregnation motor fixing plate. The pre - impregnation gear and the pre - impregnation motors are connected by a pre - impregnation belt. The inner layer yarn is led out from the inner layer yarn rack, passes through the inner layer yarn inlet plate, then enters the pre - impregnation gear, and after coming out of the pre - impregnation gear, the inner layer yarn enters the inner layer yarn outlet plate.

[0023] The winding and forming device includes a winding part, a pre - forming part, and a mold part. The winding part is used to make the arrow rod winding layer and the spiral layer; the pre - forming part is used to form the arrow rod structure, and the mold part is used to heat - cure the resin and the yarn.

[0024] The winding part includes a mandrel fixing cylinder. A mandrel is placed on the mandrel fixing cylinder. An inner layer yarn cylinder is installed on the mandrel fixing cylinder through a bearing. The inner layer yarn cylinder is evenly arranged with inner layer yarn holes and is used to pass through the inner layer yarn. A yarn cylinder gear is installed on the inner layer yarn cylinder. The yarn cylinder gear is connected to a rotating motor by a belt. The inner layer yarn cylinder is fixed on a sleeve, and the sleeve is fixed on a winding fixing cylinder. The winding fixing cylinder is installed on a winding plate. A connecting bearing is installed on the winding fixing cylinder. The other end of the connecting bearing is installed with a runner. The runner is connected to a motor at the bottom of the winding and forming device by a belt. A turntable is fixed on the outside of the runner. Three rotating cylinders are evenly distributed on the outer ring of the turntable. The other side of the rotating cylinder is connected to a damper, and the damper is used to control the rotation speed of the rotating cylinder.

[0025] A winding yarn guide is also fixed on the turntable. The winding yarn guide includes a yarn inlet guide, a winding yarn runner and a yarn outlet guide. The yarn inlet guide, the winding yarn runner and the yarn outlet guide are sequentially fixed on the wire guide rod. The winding yarn coming out of the winding yarn bobbin passes through the yarn inlet guide, the winding yarn runner and the yarn outlet guide in sequence, and finally winds around the die core.

[0026] The preforming part includes a preforming fixing frame. A fixed bottom plate is installed on the preforming fixing frame. A preforming device and a forming die are placed on the fixed bottom plate. The preforming device includes two preforming supports fixed on the fixed bottom plate. A preforming vertical lead screw is fixed on the preforming support. A preforming block is fixed on the preforming vertical lead screw. A preforming horizontal lead screw is connected to the preforming block. A preforming plate is fixed on the preforming horizontal lead screw. The position of the preforming plate is adjusted by adjusting the preforming horizontal lead screw and the preforming vertical lead screw.

[0027] The die part includes an outer die. The outer die is installed at the position of the forming die. A yarn guide is provided at the front end of the outer die. The yarn enters the outer die after passing through the yarn guide and is heated and cured inside the outer die.

[0028] The traction and cutting device includes an upper arrow rod clamping plate and a lower arrow rod clamping plate. The upper arrow rod clamping plate is fixed on the upper clamping plate fixing block. The lower arrow rod clamping plate is fixed on the lower clamping plate fixing block. The lower clamping plate fixing block is connected to the piston rod of the hydraulic cylinder. The hydraulic cylinder is installed on the hydraulic cylinder fixing plate. Both the upper clamping plate fixing plate and the hydraulic cylinder fixing plate are fixed on two vertical plates. The upper and lower arrow rod clamping plates are used to clamp the arrow rod.

[0029] A horizontal plate is fixed at the top of the vertical plate. A cutting cylinder and a filling cylinder are fixed on the horizontal plate. The cutting cylinder is connected to a cutting motor. A blade is fixed on the cutting motor for cutting the arrow rod. A second filling cylinder is fixed on the filling cylinder. A filling rod is fixed on the second filling cylinder. The filling rod is used to extend into the inner wall of the arrow rod during the traction process. The vertical plate is fixed on a sliding plate. The sliding plate is fixed on a sliding rod and a lead screw through a slider. One end of the lead screw is connected to a traction motor. The traction motor is fixed on the traction and cutting fixing frame. The traction motor is used to drive the arrow rod to move.

[0030] The present invention uses a tension gun to control the yarn tension to ensure that the extruded arrow rod has good straightness and roundness. At the same time, the winding force of the winding yarn is used to drive the inner layer yarn to rotate to make an inner layer spiral structure and a middle layer winding structure to enhance the radial load-bearing capacity of the arrow rod. At the same time, a filling rod is used to fill the inner wall of the arrow rod during the traction process of the arrow rod to prevent the traction device from flattening the arrow rod. No waste is generated during the whole production process, which is safe, environmentally friendly and has high production efficiency, and is especially suitable for the production of thin-walled arrow rods. Description of the Drawings

[0031] Figure 1 Schematic diagram of the overall structure of the present invention;

[0032] Figure 2 Schematic diagram of the outer layer yarn rack structure of the present invention;

[0033] Figure 3 Schematic diagram of the outer layer pre - impregnation device structure of the present invention;

[0034] Figure 4 Schematic diagram of the inner layer yarn rack structure of the present invention;

[0035] Figure 5 Schematic diagram of the inner layer pre - impregnation device structure of the present invention;

[0036] Figure 6 Schematic diagram of the winding and forming device structure of the present invention;

[0037] Figure 7 Schematic diagram of the winding part structure of the winding and forming device of the present invention;

[0038] Figure 8 Schematic diagram of the winding yarn guide of the present invention;

[0039] Figure 9 Schematic diagram of the pre - forming device structure of the present invention;

[0040] Figure 10 Schematic diagram of the traction and cutting device structure of the present invention;

[0041] Figure 11 Schematic diagram of the three - layer structure of the arrow shaft of the present invention. Detailed implementation manners

[0042] To further understand the features, technical means, specific purposes, and functions achieved by the present invention, the following will further describe the present invention in detail in conjunction with the drawings and specific implementation manners.

[0043] Such as Figures 1-11As shown in the figure, the present invention discloses a production device for composite material arrow shafts, which is mainly used for manufacturing arrow shafts with a three-layer structure. The three-layer structure mainly refers to a yarn structure arranged in three different ways, mainly including an inner layer spiral structure 501, a middle layer winding structure 502 and an outer layer vertical axial structure 503. The device mainly includes an outer layer yarn rack 1, an outer layer pre-impregnation device 2, an inner layer yarn rack 6, an inner layer pre-impregnation device 7, a winding and forming device 3 and a traction and cutting device 4, which together constitute a production line. The outer layer yarn rack 1 is used for placing outer layer yarn bobbins and controlling the tension of the drawn outer layer yarn; the outer layer pre-impregnation rack 2 is mainly used for impregnating the outer layer yarn; the inner layer yarn rack 6 is used for placing the inner layer yarn required for winding and pulling and rotating the whole inner layer yarn; the inner layer pre-impregnation device 7 is placed directly in front of the inner layer yarn rack 6 and is used for pre-impregnating the inner layer yarn; the winding and forming device 3 mainly winds the inner layer yarn and heats and cures the yarn resin; the traction and cutting device 4 mainly pulls the extruded arrow shaft and cuts it according to the size requirements.

[0044] As shown in the attached Figure 2 figure, the outer layer yarn rack 1 includes an outer layer yarn fixing rack 101. A plurality of groups of outer layer rollers 102 are fixed on the outer layer yarn fixing rack 101. A tension gun 103 is fixed directly above each group of outer layer rollers 102. The tension gun provides adjustable constant tension for the yarn through three pulleys. The tension gun is a well-known device and will not be elaborated here. The outer layer yarn rack outputs the outer layer yarn outward.

[0045] As shown in the attached Figure 3 figure, the outer layer pre-impregnation device 2 includes an outer layer pre-impregnation fixing rack 201. An outer layer pre-impregnation tank 203 is arranged inside the outer layer pre-impregnation fixing rack 201. The outer layer pre-impregnation tank is filled with resin. An outer layer yarn inlet plate 202 is fixed on one side of the outer layer pre-impregnation fixing rack 201. An outer layer yarn outlet plate 206 is fixed on the other side of the outer layer pre-impregnation fixing rack 201. A plurality of porcelain eyes 207 for the outer layer yarn to pass through are arranged on the outer layer yarn outlet plate 206. The outer layer yarn is led out from the outer layer yarn rack 1 and passes through the outer layer yarn inlet plate 202, and then enters a pre-impregnation plate 204 fixed above the outer layer pre-impregnation tank 203. The outer layer pre-impregnation tank 203 is fixed on the outer layer pre-impregnation fixing rack 201. A screw rod is arranged on the pre-impregnation plate 204. The screw rod is connected to the outer layer pre-impregnation fixing rack 201 and locked by a nut 205. By adjusting the nut 205, the height position of the pre-impregnation plate 204 can be adjusted. The outer layer yarn passes through the pre-impregnation plate 204, is impregnated with resin in the pre-impregnation tank, and then passes through the porcelain eyes 207 of the outer layer yarn outlet plate 206 to squeeze out the excess resin. Then, the pre-impregnated outer layer yarn enters the winding and forming device 3. The outer layer pre-impregnation device mainly plays a role in pre-impregnating the outer layer yarn with resin so that the outer layer yarn is attached with resin.

[0046] As shown in the attached Figure 4As shown, the inner layer yarn rack 6 includes an inner layer yarn fixing rack 601. An inner layer motor 602 is installed on the inner layer yarn fixing rack 601. The transmission shaft of the inner layer motor 602 is connected to a main gear, the main gear is meshed and connected to a driven gear, the driven gear is connected to an inner layer rotating shaft 603. On the other side of the inner layer rotating shaft 603, an inner layer yarn fixing plate 604 is installed. A plurality of inner layer rollers 605 are fixed on the inner layer yarn fixing plate 604. The plurality of inner layer rollers are arranged in a circular pattern. The inner layer rollers 605 are used for placing the inner layer yarn. The inner layer rotating shaft is fixed on two rotating shaft supports 606. The inner layer motor drives the two gears to rotate, thereby driving the inner layer rotating shaft to rotate. The inner layer rotating shaft drives the inner layer yarn fixing plate to rotate, and the inner layer rollers also rotate accordingly, so that the inner layer yarn can be rotated and conveyed as a whole, facilitating the formation of an inner layer spiral structure.

[0047] As shown in the Figure 5 attachment, the inner layer pre-impregnation device 7 includes an inner layer pre-impregnation rack 701. An inner layer pre-impregnation tank 706 is provided on the inner layer pre-impregnation rack 701. The inner layer pre-impregnation tank 706 is used for filling resin. On one side of the inner layer pre-impregnation rack 701, an inner layer yarn inlet plate 702 is fixed. On the other side of the inner layer pre-impregnation rack 701, an inner layer yarn outlet plate 707 is fixed. Holes for the inner layer yarn to pass through are provided on both the inner layer yarn inlet plate 702 and the inner layer yarn outlet plate 707. A pre-impregnation motor fixing plate 704 is fixed on the inner layer pre-impregnation rack 701. A pre-impregnation gear 703 is installed on the pre-impregnation motor fixing plate 704. A pre-impregnation motor 705 is provided on one side of the pre-impregnation motor fixing plate 704. The transmission shaft of the pre-impregnation motor 705 is connected to the pre-impregnation gear 703 through a belt. By the operation of the pre-impregnation motor, the pre-impregnation gear is driven to rotate. The inner layer yarn is led out from the inner layer yarn rack 6 and enters the hole on the inner layer yarn inlet plate 702, then enters the pre-impregnation gear 703, is impregnated with resin in the inner layer pre-impregnation tank, and then comes out of the pre-impregnation gear and enters the inner layer yarn outlet plate 707. Since the pre-impregnation gear is rotating, it can ensure that the inner layer yarn always maintains a rotating state. The inner layer pre-impregnation device mainly functions to pre-impregnate the inner layer yarn with resin, so that the inner layer yarn is attached with resin.

[0048] As shown in the Figures 6-9As shown, the winding forming device 3 includes a die core fixing cylinder 301, on which a die core 302 is fixed. The die core 302 passes through the die core fixing cylinder 301 and the preformed plate 3165 in sequence and then enters the outer die 325. An inner layer yarn cylinder 3011 is installed outside the die core fixing cylinder 301 through a bearing. A circle of inner layer yarn holes are evenly arranged on the inner layer yarn cylinder 3011, and the inner layer yarn holes are used for passing inner layer yarns. The inner layer yarn cylinder 3011 is fixed on a sleeve 303. A rotating gear 3012 is fixed on the inner layer yarn cylinder 3011, and the rotating gear 3012 is connected to a belt pulley on a rotating motor 3013 through a belt; the rotating motor is installed on a rotating motor fixing plate 3051, the sleeve 303 is installed on a winding fixing cylinder 304, the winding fixing cylinder 304 is installed on a winding plate 305, the winding plate 305 is installed on a winding forming fixing frame 306, a rotating motor fixing plate 3051 is installed above the winding plate 305, a fixing cylinder cover plate 3014 is installed on the die core fixing cylinder 301, and the fixing cylinder cover plate 3014 mainly places the die core fixing cylinder 301 so that the die core fixing cylinder 301 rotates synchronously with the inner layer yarn cylinder 3011. The fixing cover plate and the winding plate are connected by screws. The rotating motor 3013 drives the rotating gear 3012 to rotate, and the rotating gear 3012 drives the inner layer yarn cylinder 3011 to rotate. Since the die core fixing cylinder 301 is installed on the inner layer yarn cylinder 3011 through a bearing, the die core fixing cylinder 301 also rotates accordingly.

[0049] Two bearings 307 are fixed on the winding and fixing cylinder 304. The outer ring of the bearing 307 is fixed with a runner 308. The runner 308 is connected to the winding motor 310 located therewith by a belt 309. The winding motor 310 is fixed at the bottom of the winding and forming fixing frame 306. The runner 308 is driven to rotate by the winding motor 310. A turntable 311 is fixed on the outside of the runner 308. Three rotating cylinders 312 are evenly distributed on the outer ring of the turntable 311. The rotating cylinders 312 are used to place the winding yarn balls. The other side of the rotating cylinder 312 is connected to a damper 313. The damper 313 is fixed on the turntable 311. The damper 313 controls the rotation speed of the rotating cylinder 312. During the winding process, as the turntable 311 rotates, the speed of the winding yarn ball will be different when it is in different positions under the influence of gravity. At the same time, during the production process, the winding yarn ball is continuously reduced as it is used, which will also affect the winding speed. The damper 313 mainly controls that the winding speed is not affected when the above conditions change, ensuring the constancy of the winding speed. A winding yarn guide 314 is also fixed on the turntable 311. The winding yarn guide 314 includes a yarn inlet guide 3141, a winding yarn runner 3142 and a yarn outlet guide 3143. The yarn inlet guide 3141, the winding yarn runner 3142 and the yarn outlet guide 3143 are sequentially fixed on the wire guide rod 3144. The winding yarn coming out of the winding yarn ball sequentially passes through the yarn inlet guide 3141, the winding yarn runner 3142 and the yarn outlet guide 3143, and finally winds around the mold core 302. The winding yarn guide 314 mainly ensures that the winding position is fixed and the winding process will not change with the position of the yarn on the yarn ball. This part is mainly for outputting the winding yarn.

[0050] After the inner layer yarn passes through the inner layer yarn cylinder 301, the inner layer yarn cylinder rotates following the winding motor 3013, driving the inner layer yarn to rotate spirally along the mold core 302. The winding yarn will wind the inner layer yarn around the mold core 302. At the same time, the excess resin on the inner layer yarn will also impregnate the winding yarn, ensuring that there is resin on all the yarns.

[0051] A fixed bottom plate 315 is installed on the preforming fixing frame 306. A preforming device 316 and a forming mold 317 are placed on the fixed bottom plate 315. The preforming device 316 includes two preforming supports 3161 fixed on the fixed bottom plate 315. A preforming vertical lead screw 3162 is fixed on the preforming support 3161. A preforming block 3163 is fixed on the preforming vertical lead screw 3162. A preforming horizontal lead screw 3164 is connected to the preforming block 3163. A preforming plate 3165 is fixed on the preforming horizontal lead screw 3164. The position of the preforming plate 3165 can be adjusted by adjusting the above-mentioned lead screws.

[0052] A forming die 317 is fixed on the fixed bottom plate 315. The forming die 317 is connected to the fixed bottom plate 315 through a support 319. A vertical lead screw 320 is fixed inside the support 319. A forming connecting piece 321 is fixed above the vertical lead screw 320. A horizontal lead screw 322 is connected to the forming connecting piece 321. A lower die 323 is fixed on the horizontal lead screw 322. An upper die 324 is arranged above the lower die 323. An outer mold 325 is placed in the middle of the upper die and the lower die. The outer mold 325 is used for forming the arrow shaft. Heating rods are installed in both the upper die and the lower die to heat the outer mold 325. A yarn guide 326 is placed at the front end of the outer mold 325. The yarn guide 326 mainly conducts secondary guiding of the yarn. By heating the upper die and the lower die, the outer mold is heated, so as to cure and form the resin-impregnated yarn entering the outer mold. A drying channel 327 is arranged inside the outer mold to dry the arrow shaft.

[0053] The inner layer yarn after winding and the winding yarn together squeeze out the redundant resin through the preforming device 316. The outer layer yarn enters the hole positions on the preforming plate 3165 after passing through the outer layer yarn outlet plate 206. Two groups of outer layer yarn racks and outer layer pre-impregnation devices are symmetrically fixed on both sides of the winding and forming device to ensure that the tensions of the outer layer yarns on the left side and the right side of the outer mold 325 are the same. Then all the yarns (outer layer yarns, inner layer yarns and winding yarns) pass through the yarn guide 326 and enter the outer mold 325 to start heating and curing. After the resin and the yarn are cured, they come out from the other end of the outer mold 325. To ensure uniform cooling of the arrow shaft, after the arrow shaft leaves the outer mold 325, it will enter the drying channel 327 embedded on the outer mold. The drying channel 327 is heated by heat conduction from the upper die and the lower die and does not need to be heated separately. The other end of the drying channel 327 is placed on the drying channel support plate 328. The drying channel support plate 328 is installed on the fixed bottom plate 315. After curing, an arrow shaft with a three-layer structure is formed.

[0054] As shown in the appendix Figure 10As shown in the figure, the traction cutting device 4 includes a traction fixing frame 401, on which a traction motor 402 is installed. The traction motor 402 is used to traction the arrow rod to move. The traction motor 402 is connected to a lead screw 403, and the lead screw 403 is fixed on a front support 404. Both ends of the front support 404 are fixed with slide bars 405, and the other ends of the lead screw 403 and the slide bars 405 are fixed on a rear support 406. Both the front support 404 and the rear support 406 are installed on the traction fixing frame 401. A movable lead screw slider 407 is connected to the lead screw 403. A slider plate 408 is installed on the lead screw slider 407. Two sliders 409 are fixed at both ends of the slider plate 408. The sliders 409 are connected to a slider plate 410. Two vertical plates 411 are fixed on the slider plate 408. A hydraulic cylinder fixing plate 412 is fixed on the vertical plates 411. A hydraulic cylinder 413 is installed on the hydraulic cylinder fixing plate 412. A lower clamp fixing plate 414 is installed on the piston rod of the hydraulic cylinder 413. An arrow rod lower clamp 415 is installed on the lower clamp fixing plate 414. An upper clamp fixing plate 416 is fixed on the vertical plates 411. An arrow rod upper clamp 417 is installed on the upper clamp fixing plate 416. The arrow rod upper clamp and the arrow rod lower clamp are used to clamp the arrow rod for pulling and extruding. A horizontal plate 418 is fixed at the top of the vertical plates 411. A cutting cylinder 419 and a filling cylinder 420 are fixed on the horizontal plate 418. The cutting cylinder 419 is connected to a cutting motor 421. A blade 422 is fixed on the cutting motor 421 for cutting the arrow rod. The filling cylinder 420 is fixed with a second filling cylinder 423. The second filling cylinder 423 is fixed with a filling rod 424. Driven by the second filling cylinder 423, the filling rod 424 extends into the inner wall of the arrow rod during the traction process to prevent the hydraulic cylinder 413 from squeezing the arrow rod flat during the traction process due to the too thin wall of the arrow rod.

[0055] In the traction device, the traction motor 402 drives the lead screw 403 to rotate, so that the lead screw slider 407 moves on the lead screw, thereby driving the hydraulic cylinder 413 to move together to change the position, and then adjusting the gap between the arrow rod lower clamp and the arrow rod upper clamp through the hydraulic cylinder to realize the clamping control of the arrow rod. The cutting motor drives the blade to cut the arrow rod.

[0056] The present invention also provides a method for producing a composite material arrow rod, including the following steps:

[0057] Step 1: Lead out the yarn of the outer yarn bobbin fixed on the inner and outer layer yarn frame rollers. After the outer yarn passes through the tension gun, it is led out from the pulley on the upper part of the tension gun, and the outer yarn obtains a constant tension. The inner yarn directly enters the inner layer yarn pre-impregnation device.

[0058] Step 2: The outer-layer yarn enters the outer-layer pre-impregnation device. After passing through the outer-layer yarn inlet plate, the outer-layer pre-impregnation tank, and the outer-layer yarn outlet plate in sequence, the excess resin on the outer-layer yarn will be squeezed out by the porcelain eyes on the outer-layer yarn outlet plate, and then it enters the pre-forming device on the winding and forming device. After the inner-layer yarn enters the inner-layer pre-impregnation device, it passes through the inner-layer yarn inlet plate, the pre-impregnation gear, and the inner-layer yarn outlet plate in sequence and then enters the winding and forming device.

[0059] Step 3: The inner-layer yarn enters the inner-layer yarn bobbin of the winding and forming device. Each inner-layer yarn is evenly arranged around the mold core. After passing through the inner-layer yarn bobbin, the inner-layer yarn is wound by the winding yarn led out from the rotating cylinder. Affected by the rotating motor, the inner-layer yarn begins to rotate along the mold core. The winding yarn and the inner-layer yarn are fixed on the mold core together. The inner-layer yarn is formed on the surface of the mold core in a spiral manner, forming a spiral structure for the inner layer, so that the inner-layer yarn and the winding yarn are tightly fastened on the mold core. Then the winding yarn winds around the inner-layer yarn again to form a winding structure for the middle layer.

[0060] Step 4: After the winding yarn and the inner-layer yarn are fixed together, they enter the pre-forming device together with the outer-layer yarn. The outer-layer yarn is arranged axially vertically on the surface of the winding yarn. At this time, the excess resin on the inner-layer yarn and the winding yarn fixed on the mold core is squeezed out. Then all the yarns pass through the yarn guide and then all enter the outer mold. After the yarns and the resin are heated and formed in the outer mold, a three-layer tight structure is formed, namely the inner-layer spiral structure, the middle-layer winding structure, and the outer-layer vertical axial structure. The three layers are different yarn arrangement methods, which together constitute the arrow rod. The outer-layer vertical axial structure is arranged along the axial direction of the arrow rod. The arrow rod comes out of the outer mold and enters the baking channel.

[0061] Step 5: After the arrow rod is cooled out of the baking channel, it will enter the traction and cutting device. First, the hydraulic cylinder starts to move, driving the lower clamping block to move upward. After slightly locking the arrow rod with the upper clamping block, the cutting cylinder drives the cutting motor to cut off the front arrow rod, and the cut-off arrow rod is taken away by hand. Then the cutting motor and the cutting cylinder return to their original positions. The filling cylinder drives the second filling cylinder to move downward, and the second cylinder drives the filling rod to move forward. The filling rod enters the inside of the arrow rod, and the hydraulic cylinder tightly holds the arrow rod. Then the traction motor drives the whole arrow rod to move and pulls out the arrow rod. After pulling out a certain distance, the filling cylinder returns to its original position, and then the hydraulic cylinder returns to its original position. Finally, the traction motor returns to its original position. Then it starts to cycle reciprocally.

[0062] It should be noted that the above is only the preferred embodiment of the present invention and is not used to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A production method for a composite material arrow shaft, characterized in that, it includes the following steps: Step 1, lead out the outer layer yarn through a tension gun, and use the tension gun to make the outer layer yarn have a constant tension. The inner layer yarn enters the inner layer pre-impregnation device to be pre-impregnated with resin; Step 2, the outer layer yarn enters the outer layer pre-impregnation device to be pre-impregnated with resin, then squeeze out the excess resin on the outer layer yarn, and then send the outer layer yarn into the pre-forming device on the winding forming device; Step 3, rotate and convey the inner layer yarn and wind it in a spiral manner on the surface of the mandrel to form an inner layer spiral structure, and then wind it with a winding yarn to form a middle layer winding structure, so that the inner layer yarn is tightly formed on the mandrel; Step 4, after the winding yarn and the inner layer yarn are fixed together, they enter the pre-forming device together with the outer layer yarn. The outer layer yarn is arranged in a vertical axial direction on the surface of the winding yarn to form an outer layer vertical axial structure. At this time, squeeze out the excess resin on the inner layer yarn and the winding yarn fixed on the mandrel. After that, all the yarns enter the outer mold through a yarn guide, and are output after being heated and cured to form an arrow shaft, and the arrow shaft is sent into a baking tunnel; Step 5, after the arrow shaft is cooled out of the baking tunnel, it will enter the traction cutting device. First, the hydraulic cylinder starts to move, driving the lower clamping block to move upward, slightly locking the arrow shaft with the upper clamping block, and then the cutting cylinder drives the cutting motor to cut off the front arrow shaft, and the cut arrow shaft is taken away by an operator. After that, the cutting motor and the cutting cylinder reset, the filling cylinder drives the second filling cylinder to move downward, the second cylinder drives the filling rod to move forward, the filling rod enters the inside of the arrow shaft, the hydraulic cylinder completely hugs the arrow shaft, and then the traction motor drives the whole arrow shaft to move, pulling out the arrow shaft. After pulling out a certain distance, the filling cylinder resets and then the hydraulic cylinder resets, and finally the traction motor resets, and starts to reciprocate.

2. A composite material arrow shaft production equipment applying the production method described in claim 1, mainly used for manufacturing an arrow shaft with a three-layer structure, characterized in that, the three-layer structure arrow shaft includes an inner layer spiral structure, a middle layer winding structure and an outer layer vertical axial structure. The equipment includes an outer layer yarn rack, an outer layer pre-impregnation device, an inner layer yarn rack, an inner layer pre-impregnation device, a winding forming device and a traction cutting device; the outer layer yarn rack is used for placing the outer layer yarn bobbin and controlling the tension of the led-out outer layer yarn, and leading out the outer layer yarn outward; the outer layer pre-impregnation device is installed directly in front of the outer layer yarn rack and is used for pre-impregnating the outer layer yarn with resin; two groups of the outer layer yarn rack and the outer layer pre-impregnation device are provided and placed on both sides of the winding device; the inner layer yarn rack is used for placing the inner layer yarn required for winding and pulling and making the inner layer yarn rotate as a whole; the inner layer pre-impregnation device is placed directly in front of the inner layer yarn rack and is used for pre-impregnating the inner layer yarn and controlling the rotation of the inner layer yarn at the same time; the winding forming device is installed directly in front of the inner layer pre-impregnation device and is used for winding and heating and curing the yarn; the traction cutting device is installed directly in front of the winding forming device and is used for traction of the extruded arrow shaft and cutting the arrow shaft according to the set size.

3. The composite material arrow shaft production equipment according to claim 2, characterized in that, The outer yarn rack includes an outer yarn fixing rack, on which several groups of outer rollers and tension guns are installed, and the tension guns are fixed directly above each group of outer rollers.

4. The composite arrow shaft production equipment according to claim 2, wherein, the outer pre-impregnation device includes an outer pre-impregnation rack and an outer pre-impregnation tank. The outer pre-impregnation tank is fixed on the outer pre-impregnation rack and filled with resin. An outer yarn inlet plate is installed on one side of the outer pre-impregnation rack, and an outer yarn outlet plate is installed on the other side of the outer pre-impregnation rack. The outer yarn is led out from the outer yarn rack, passes through the outer yarn inlet plate, then enters the pre-impregnation plate placed above the outer pre-impregnation tank. After pre-impregnation, the outer yarn passes through the outer yarn outlet plate to squeeze out the excess resin, and then enters the winding and forming device.

5. The composite arrow shaft production equipment according to claim 2, wherein, the inner yarn rack includes an inner yarn fixing rack, on which an inner motor is installed. The inner motor is connected to an inner rotating shaft, and the inner rotating shaft is installed and connected to an inner yarn fixing plate. Inner rollers are fixed on the inner yarn fixing plate, and the inner rollers are used to place the inner yarn.

6. The composite arrow shaft production equipment according to claim 2, wherein, the inner pre-impregnation device includes an inner pre-impregnation rack, on which an inner pre-impregnation tank filled with resin is installed. An inner yarn inlet plate is fixed on one side of the inner pre-impregnation rack, and an inner yarn outlet plate is installed on the other side of the inner pre-impregnation rack. A pre-impregnation motor fixing plate is fixed on the inner pre-impregnation rack, and a pre-impregnation gear is installed on the pre-impregnation motor fixing plate. Pre-impregnation motors are installed on both sides of the pre-impregnation motor fixing plate. The pre-impregnation gear and the pre-impregnation motors are connected by a pre-impregnation belt. The inner yarn is led out from the inner yarn rack, passes through the inner yarn inlet plate and enters the pre-impregnation gear. The inner yarn is led out from the inner yarn rack, passes through the inner yarn inlet plate, then enters the pre-impregnation gear, and the inner yarn comes out of the pre-impregnation gear and enters the inner yarn outlet plate.

7. The composite arrow shaft production equipment according to claim 2, wherein, the winding and forming device includes a winding part, a pre-forming part and a mold part. The winding part is used to make the arrow shaft winding layer and the spiral layer; the pre-forming part is used to form the arrow shaft structure, and the mold part is used to heat and cure the resin and the yarn.

8. The composite arrow shaft production equipment according to claim 7, wherein, The winding part includes a die core fixing cylinder, on which a die core is placed. An inner layer yarn cylinder is mounted on the die core fixing cylinder through bearings. The inner layer yarn cylinder is evenly provided with inner layer yarn holes for passing through inner layer yarns. A yarn cylinder gear is mounted on the inner layer yarn cylinder. The yarn cylinder gear is connected to a rotating motor through a belt. The inner layer yarn cylinder is fixed on a sleeve, and the sleeve is fixed on a winding fixing cylinder. The winding fixing cylinder is mounted on a winding plate. A connecting bearing is mounted on the winding fixing cylinder, and the other end of the connecting bearing is mounted with a runner. The runner is connected to a motor located at the bottom of the winding forming device through a belt. A turntable is fixed on the outside of the runner, and three rotating cylinders are evenly distributed on the outer ring of the turntable. The other side of the rotating cylinder is connected to a damper, and the damper is used to control the rotation speed of the rotating cylinder.

9. The composite material arrow rod production equipment according to claim 8, characterized in that a winding yarn guide is further fixed on the turntable. The winding yarn guide includes a yarn inlet guide, a winding yarn runner and a yarn outlet guide. The yarn inlet guide, the winding yarn runner and the yarn outlet guide are sequentially fixed on a wire guide rod. The winding yarn coming out of the winding yarn bobbin sequentially passes through the yarn inlet guide, the winding yarn runner and the yarn outlet guide, and finally winds around the die core.

10. The composite material arrow rod production equipment according to claim 9, characterized in that the preforming part includes a preforming fixing frame, on which a fixing bottom plate is mounted. A preforming device and a forming die are placed on the fixing bottom plate. The preforming device includes two preforming supports fixed on the fixing bottom plate. A preforming vertical lead screw is fixed on the preforming support. A preforming block is fixed on the preforming vertical lead screw. A preforming horizontal lead screw is connected to the preforming block. A preforming plate is fixed on the preforming horizontal lead screw. The position of the preforming plate is adjusted by adjusting the preforming horizontal lead screw and the preforming vertical lead screw.

11. The composite material arrow rod production equipment according to claim 10, characterized in that the die part includes an outer die, which is installed at the position of the forming die. A yarn guide is provided at the front end of the outer die. The yarn enters the outer die through the yarn guide and is heated and cured inside the outer die.

12. The composite material arrow rod production equipment according to claim 2, characterized in that the traction cutting device includes an upper arrow rod clamp and a lower arrow rod clamp. The upper arrow rod clamp is fixed on an upper clamp fixing block. The lower arrow rod clamp is fixed on a lower clamp fixing block. The lower clamp fixing block is connected to the piston rod of a hydraulic cylinder. The hydraulic cylinder is installed on a hydraulic cylinder fixing plate. The upper clamp fixing block and the hydraulic cylinder fixing plate are both fixed on two vertical plates. The upper and lower arrow rod clamps are used to clamp the arrow rod.

13. The composite material arrow rod production equipment according to claim 12, characterized in that A horizontal plate is fixed to the top of the vertical plate. A cutting cylinder and a filling cylinder are fixed to the horizontal plate. The cutting cylinder is connected to a cutting motor, and a blade is fixed to the cutting motor for cutting the arrow shaft. A second filling cylinder is fixed to the filling cylinder, and a filling rod is fixed to the second filling cylinder. The filling rod is used to extend into the inner wall of the arrow shaft during the traction process. The vertical plate is fixed to a sliding plate, and the sliding plate is fixed to a sliding rod and a lead screw through sliders. One end of the lead screw is connected to a traction motor, and the traction motor is fixed to a traction cutting fixing frame. The traction motor is used to traction the arrow shaft to move.

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