Glass fiber reinforced thermoplastic unidirectional prepreg tape resin coating equipment

Abstract

The invention belongs to the technical field of one-way prepreg tape production, and particularly relates to glass fiber reinforced thermoplastic one-way prepreg tape resin coating equipment which comprises a resin coating device, the resin coating device comprises a guide frame, and a first guide roller and a second guide roller are rotationally arranged at the two ends of the guide frame correspondingly. The resin coating device further comprises a roller-shaped first sponge rubber roller and a roller-shaped second sponge rubber roller, and the first sponge rubber roller and the second sponge rubber roller are symmetrically arranged on the upper surface and the lower surface of the fiber belt. As the sponge rubber has good elasticity and liquid absorbability, the sponge rubber can uniformly adsorb and store the resin material, so that the resin can be continuously and uniformly extruded onto the fiber surface when the fiber belt passes through, and the thickness consistency and the quality stability of the prepreg are ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of unidirectional prepreg tape production, and in particular relates to a glass fiber reinforced thermoplastic unidirectional prepreg tape resin coating device. Background Art

[0002] Prepreg tape generally refers to the product obtained by impregnating fiber tape with molten resin. The penetration and distribution of molten resin in the prepreg tape directly affects the wetting effect of the molten resin, thereby further affecting the quality of the final prepreg tape.

[0003] For example, Chinese invention patent application CN116330709A discloses a fiber-reinforced thermoplastic unidirectional prepreg tape production line and a production method thereof, wherein the fiber-reinforced thermoplastic unidirectional prepreg tape production line comprises an extrusion box, a fiber tape is arranged inside the extrusion box, notches are provided on the left and right side walls of the extrusion box, extrusion heads are provided above and below the fiber roll, both of the two extrusion heads are provided with strip grooves, both of the extrusion heads are fixedly connected to the extrusion box, a first adjustment group is provided above and below the extrusion head, and an extrusion group for extruding molten resin is provided on one side of the extrusion box. The production line can adjust fiber bands of different widths through the first adjustment group, and the change in the width of the fiber band can automatically control the amount of resin flowing from the connecting pipe into the extruder head in direct proportion, thereby satisfying the condition that the amount of resin required increases when the width of the fiber band increases, so that the same production line can process fiber bands of different widths and reduce costs. However, the control of the resin flow in the production line cannot guarantee a timely response to the fiber band, and it does not have the ability to adjust the tension of the fiber band. The lag in tension control can easily lead to fiber deformation and uneven distribution of molten resin on the fiber band, and the resin coating uniformity is poor, which affects the fiber band impregnation quality. Summary of the invention

[0004] The present invention aims to solve the above-mentioned problems existing in the prior art and provides a glass fiber reinforced thermoplastic unidirectional prepreg resin coating device. The present invention uses a first sponge rubber roller and a second sponge rubber roller to coat the resin in an extruded form. Since the sponge rubber has good elasticity and liquid absorption, it can uniformly absorb and store the resin material, so that when the fiber tape passes, the resin can be continuously and evenly extruded onto the fiber surface, ensuring the thickness consistency and quality stability of the prepreg.

[0005] In order to solve the problems of the prior art, the present invention provides a glass fiber reinforced thermoplastic unidirectional prepreg tape resin coating equipment, including a resin coating device, the resin coating device includes a guide frame for the fiber tape to pass through, a first guide roller and a second guide roller are rotatably installed at both ends of the guide frame along the winding direction of the fiber tape, the fiber tape is successively wound from above the first guide roller and the second guide roller close to the unwinding frame, and wound out from above the second guide roller and the first guide roller close to the winding frame, a tensioning adjustment mechanism located above the fiber tape is provided between each first guide roller and the corresponding second guide roller, the resin coating device also includes a first sponge rubber roller and a second sponge rubber roller in the form of a roller, the first sponge rubber roller and the second The sponge rubber rollers are both porous elastic structures. The pore size range of the sponge rubber in the first sponge rubber roller and the second sponge rubber roller is 0.1-0.3mm, and the Shore hardness of the sponge rubber is 25-35 degrees. The first sponge rubber roller and the second sponge rubber roller are symmetrically arranged on the upper and lower surfaces of the fiber belt. The first sponge rubber roller and the second sponge rubber roller are located between two tensioning adjustment mechanisms. A resin filling piece is coaxially fixedly connected to the center of the first sponge rubber roller and the second sponge rubber roller respectively. A two-way linkage piece is provided between the two ends of the two resin filling pieces for controlling the relative movement of the first sponge rubber roller and the second sponge rubber roller, and the end of each resin filling piece is rotatably connected to the two-way linkage piece.

[0006] Preferably, when the first sponge rubber roller and the second sponge rubber roller synchronously squeeze the fiber tape, the first sponge rubber roller and the second sponge rubber roller rotate following the winding of the fiber tape and extrude the resin at the same time.

[0007] Preferably, the resin filling piece is a hollow cylindrical structure, one end of the resin filling piece is provided with a filling port, and a surface of the resin filling piece is evenly provided with a plurality of extrusion holes communicating with the inner cavity thereof; A temperature sensor and an electric heating plate are provided inside the resin filling piece. The temperature sensor monitors the temperature of the resin in the resin filling piece and feeds back to the control system to keep the resin inside the resin filling piece at 60-65°C. When the temperature of the resin in the resin filling piece is lower than 60°C, the control system controls the electric heating plate to turn on to heat the resin in the resin filling piece. When the temperature of the resin in the resin filling piece reaches 65°C, the control system controls the electric heating plate to turn off to keep the resin in the resin filling piece at 60-65°C to ensure good fluidity of the resin.

[0008] Preferably, a clamping block protruding outward is respectively provided at both ends of the resin filling piece, and grooves for clamping with corresponding clamping blocks are respectively formed on the inner walls of the first sponge rubber roller and the second sponge rubber roller.

[0009] Preferably, the bidirectional linkage member includes a linkage rod, one end of the linkage rod is rotatably connected to the end of the resin filling member above the fiber belt, and the other end of the linkage rod is slidably connected to the end of the resin filling member below the fiber belt, and a guide track is provided on the linkage rod along its edge direction for the sliding of the resin filling member connected to the second sponge rubber roller.

[0010] Preferably, a transverse sliding groove is provided on the guide frame along its horizontal direction, and two symmetrical moving blocks are slidably connected in the transverse sliding groove. The end of each resin filling piece is fixedly connected to a shaft sleeve, a first linkage rod is provided between each moving block and the shaft sleeve of the first sponge rubber roller, and a second linkage rod is provided between each moving block and the shaft sleeve of the second sponge rubber roller, and the ends of each first linkage rod and the second linkage rod are rotatably connected to the corresponding moving block and the shaft sleeve.

[0011] Preferably, the tensioning adjustment mechanism comprises a tensioning roller, which is arranged on the guide frame in the form of crossing the fiber belt, the axial direction of the tensioning roller is parallel to the axial direction of the first guide roller and the second guide roller, a vertical slide groove is provided on the guide frame at a position corresponding to the end of the tensioning roller, a slider is slidably provided in the vertical slide groove, the end of the tensioning roller is rotatably connected to the slider, a lower pressure block is also provided in the vertical slide groove and above the slider, and a compression spring is connected between the lower pressure block and the slider; The tension adjustment mechanism also includes a tension sensor, which is fixed in the bearing seat of the tension roller and is used to monitor the tension value of the fiber belt in real time. The tension sensor can be a strain gauge or piezoelectric sensor. The tension sensor directly measures the tension value of the fiber belt and transmits it to the control system. The control system controls the start and stop of the single-axis cylinder according to the information fed back by the tension sensor, so that the fiber belt always maintains the preset tension value, thereby realizing accurate control of the tension of the fiber belt.

[0012] Preferably, a connecting rod is fixedly connected between the two lower pressure blocks on the same side, and an elastic buckle is provided on the linkage frame rod extending toward the connecting rod. The elastic buckle is a polyurethane buckle with an elastic coefficient of 5-10N / mm, and a slot for the elastic buckle to be engaged is opened on the connecting rod.

[0013] Preferably, a single-axis cylinder for pushing and pulling the connecting rod is provided on both sides of the guide frame, the piston rod end of the single-axis cylinder is rotatably connected to the connecting rod, and the cylinder body of the single-axis cylinder is rotatably connected to the guide frame.

[0014] Preferably, a material receiving pool for containing the second sponge rubber roller is fixedly provided on the guide frame and below the fiber belt.

[0015] Beneficial effects of the present invention: The present invention uses a first sponge rubber roller and a second sponge rubber roller to apply the resin in an extrusion form. Since the sponge rubber has good elasticity and liquid absorption, it can uniformly absorb and store the resin material, so that when the fiber tape passes, the resin can be continuously and uniformly extruded onto the fiber surface, ensuring the thickness consistency and quality stability of the prepreg, and improving the yield rate of the prepreg tape. The resin is applied to the fiber tape in a pressurized state, which helps the resin to better penetrate into the interior of the fiber, thereby achieving uniform and sufficient impregnation of the fiber tape with the resin, avoiding waste caused by excessive coating, and also reducing splashing and dripping of the resin during the coating process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the top-facing three-dimensional structure of a glass fiber reinforced thermoplastic unidirectional prepreg tape resin coating device.

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the bottom surface of the glass fiber reinforced thermoplastic unidirectional prepreg resin coating equipment.

[0018] Figure 3 It is a left view of a three-dimensional structural schematic diagram of a glass fiber reinforced thermoplastic unidirectional prepreg tape resin coating device facing the top surface.

[0019] Figure 4 It is a partial three-dimensional structural cross-sectional view of a glass fiber reinforced thermoplastic unidirectional prepreg tape resin coating device.

[0020] Figure 5 It is a plan cross-sectional view of a resin coating device for glass fiber reinforced thermoplastic unidirectional prepreg tape.

[0021] Figure 6 It is a three-dimensional structural schematic diagram of a resin filling part and a bidirectional linkage part of a glass fiber reinforced thermoplastic unidirectional prepreg resin coating device.

[0022] Figure 7 It is a left view of the resin filling parts and bidirectional linkage parts of the glass fiber reinforced thermoplastic unidirectional prepreg resin coating equipment.

[0023] Figure 8 yes Figure 7 A cross-sectional view of the three-dimensional structure at AA.

[0024] Fig. 9 yes Figure 5 An enlarged schematic diagram of point B.

[0025] Fig.10 yes Figure 2 Enlarged schematic diagram of point C.

[0026] The numbers in the figure are: 1. fiber belt; 2. guide frame; 21. first guide roller; 22. second guide roller; 23. horizontal slide; 24. vertical slide; 3. tensioning adjustment mechanism; 31. tensioning roller; 32. slider; 33. lower pressure block; 331. compression spring; 34. connecting rod; 341. single-axis cylinder; 4. first sponge rubber roller; 5. second sponge rubber roller; 6. resin filling piece; 61. filling port; 62. extrusion hole; 63. block; 7. two-way linkage; 71. linkage frame rod; 711. guide rail; 72. moving block; 721. first linkage rod; 722. second linkage rod; 73. shaft joint; 74. elastic buckle; 741. bayonet; 8. material receiving pool. DETAILED DESCRIPTION

[0027] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] See also Figure 1-Figure 5 As shown, a glass fiber reinforced thermoplastic unidirectional prepreg tape resin coating device comprises a resin coating device, wherein the resin coating device comprises a guide frame 2 for a fiber tape 1 to pass through, a first guide roller 21 and a second guide roller 22 are rotatably mounted on both ends of the guide frame 2 along the winding direction of the fiber tape 1, the fiber tape 1 is successively wound in from above the first guide roller 21 and the second guide roller 22 close to the unwinding frame direction, and wound out from above the second guide roller 22 and the first guide roller 21 close to the winding frame direction, and a tensioning adjustment mechanism 3 is provided between each first guide roller 21 and the corresponding second guide roller 22, which is located above the fiber tape 1. The resin coating device also includes a first sponge rubber roller 4 and a second sponge rubber roller 5 in roller shape, which are symmetrically arranged on the upper and lower surfaces of the fiber belt 1, and are located between the two tensioning adjustment mechanisms 3. A resin filling member 6 is coaxially fixedly connected to the center of the first sponge rubber roller 4 and the second sponge rubber roller 5, and a two-way linkage member 7 for controlling the relative movement of the first sponge rubber roller 4 and the second sponge rubber roller 5 is provided between the two ends of the two resin filling members 6, and the end of each resin filling member 6 is rotatably connected to the two-way linkage member 7. Among them, the pore size range of the sponge rubber in the first sponge rubber roller 4 and the second sponge rubber roller 5 is 0.1-0.3mm, and the Shore hardness of the sponge rubber is 25-35 degrees, so as to ensure that the resin adsorption amount of the first sponge rubber roller 4 and the second sponge rubber roller 5 is effectively guaranteed.

[0029] During the production process of prepreg tapes, when the fiber tape 1 after preheating treatment enters the resin coating device, it first bypasses the first guide roller 21, then passes between the two tensioning adjustment mechanisms 3, and then winds out from the second guide roller 22. During this process, the first sponge rubber roller 4 and the second sponge rubber roller 5 synchronously extrude the upper and lower surfaces of the fiber tape 1. The resin filling member 6 is pre-loaded with molten thermoplastic resin. As the fiber tape 1 moves between the tensioning adjustment mechanisms 3, the resin filling members 6 on the first sponge rubber roller 4 and the second sponge rubber roller 5 will evenly extrude the resin onto the fiber tape 1 to achieve comprehensive and uniform coating of the fibers. The bidirectional linkage 7 ensures that when the fiber tape 1 is stretched or contracted, the first sponge rubber roller 4 and the second sponge rubber roller 5 can maintain a stable relative position and synchronously adjust the extrusion force, thereby adjusting the resin coating amount. As the fiber tape 1 is wound, the resin is continuously extruded to achieve the effect of continuously coating the fiber tape 1 with resin. The fiber tape 1 after resin coating is subsequently subjected to a cooling treatment, so that the resin is rapidly cooled and solidified, and a firm resin matrix layer is formed on the fiber surface, thereby forming a continuous glass fiber reinforced thermoplastic unidirectional prepreg tape.

[0030] See also Figure 4 and Figure 5 As shown, the first sponge rubber roller 4 and the second sponge rubber roller 5 are both porous elastic structures. When the first sponge rubber roller 4 and the second sponge rubber roller 5 synchronously extrude the fiber tape 1, the first sponge rubber roller 4 and the second sponge rubber roller 5 rotate following the winding of the fiber tape 1 and extrude the resin at the same time.

[0031] The first sponge rubber roller 4 and the second sponge rubber roller 5 can effectively absorb and store resin materials due to their porous elastic structure design. When the fiber tape 1 passes on the guide frame 2, it passes between the first guide roller 21 and the second guide roller 22 and is affected by the tensioning adjustment mechanism 3. At this time, the first sponge rubber roller 4 and the second sponge rubber roller 5 rotate synchronously following the movement trajectory of the fiber tape 1. During the rotation process, due to the presence of the resin filler 6, the first sponge rubber roller 4 and the second sponge rubber roller 5 will continuously and evenly squeeze the resin stored inside onto the fiber tape 1. This dynamic extrusion method ensures that the resin can tightly wrap the fiber tape 1 to form a continuous and uniform resin layer, thereby greatly improving the quality and production efficiency of the prepreg tape.

[0032] See also Figure 4-Figure 8 As shown, the resin filler 6 is a hollow cylindrical structure, a filling port 61 is provided at one end of the resin filler 6, and a plurality of extrusion holes 62 communicating with the inner cavity thereof are evenly provided on the surface of the resin filler 6.

[0033] The resin filler 6 is a hollow cylindrical structure that can accommodate and store sufficient resin material for use in the coating process. The filling port 61 at one end of the resin filler 6 is convenient for the operator to inject or replenish thermoplastic resin therein, ensuring sufficient supply of resin during continuous production. When the first sponge rubber roller 4 and the second sponge rubber roller 5 rotate with the movement of the fiber tape 1, the resin inside the resin filler 6 is subjected to the pressure of the sponge rubber roller and will flow out steadily from the extrusion hole 62, and will be evenly transferred to the glass fiber tape 1 through the sponge rubber to form a prepreg, accurately controlling the release amount and distribution of the resin.

[0034] A temperature sensor and an electric heating plate are provided inside the resin filling piece 6. The temperature sensor monitors the temperature of the resin in the resin filling piece 6 and feeds back to the control system, so that the resin in the resin filling piece 6 is maintained at 60-65°C. When the temperature of the resin in the resin filling piece 6 is lower than 60°C, the control system controls the electric heating plate to turn on to heat the resin in the resin filling piece 6. When the temperature of the resin in the resin filling piece 6 reaches 65°C, the control system controls the electric heating plate to turn off, so that the resin in the resin filling piece 6 is maintained at 60-65°C to ensure good fluidity of the resin.

[0035]

[0036] Table 1: Comparison of resin extrusion rates at different temperatures It can be seen from Table 1 that when the resin inside the resin filling member 6 is maintained at 60-65°C, the resin extrusion rate is the highest and the coating uniformity is good. The resin coating equipment runs continuously for 24 hours, the extrusion hole blockage rate is less than 1%, and the resin utilization rate can reach 95%, reducing the waste of resin.

[0037] See also Figure 4 and Figure 8 As shown, a block 63 protruding outward is respectively provided at both ends of the resin filling member 6 , and grooves for engaging with the corresponding block 63 are respectively opened on the inner walls of the first sponge rubber roller 4 and the second sponge rubber roller 5 .

[0038] The outwardly protruding blocks 63 at both ends of the resin filler 6 are intended to ensure that the resin filler 6 can be firmly installed inside the first sponge rubber roller 4 and the second sponge rubber roller 5. The inner walls of the first sponge rubber roller 4 and the second sponge rubber roller 5 are correspondingly provided with grooves that match the blocks 63. When assembling, the blocks 63 at both ends of the resin filler 6 can be embedded in the corresponding grooves on the inner walls of the first sponge rubber roller 4 and the second sponge rubber roller 5, thereby achieving a stable connection between the first sponge rubber roller 4 and the second sponge rubber roller 5 and the resin filler 6.

[0039] See also Figure 4-Figure 8As shown, the bidirectional linkage member 7 includes a linkage rod 71, one end of the linkage rod 71 is rotatably connected to the end of the resin filling member 6 above the fiber belt 1, and the other end of the linkage rod 71 is slidably connected to the end of the resin filling member 6 below the fiber belt 1. The linkage rod 71 is provided with a guide track 711 along its edge direction for the sliding of the resin filling member 6 connected to the second sponge rubber roller 5.

[0040] When the upper resin filler 6 adjusts the distance between itself and the fiber belt 1, the linkage rod 71 moves synchronously with the upper resin filler 6. Since the linkage rod 71 has a guide track 711 for the lower resin filler 6 to slide, the lower resin filler 6 will make corresponding sliding adjustments along the guide track 711 on the linkage rod 71. The guide track 711 guides the lower resin filler 6 relative to the upper resin filler 6. The upper and lower resin fillers 6 can maintain consistency in relative positions and release resin onto the fiber belt 1 synchronously, thereby achieving effective control of the thickness and uniformity of the resin coating.

[0041] See also Figure 4-Figure 8 As shown, a transverse sliding groove 23 is opened on the guide frame 2 along its horizontal direction, and two symmetrical moving blocks 72 are slidably connected in the transverse sliding groove 23. The end of each resin filling piece 6 is fixedly connected with an axial sleeve 73, and a first linkage rod 721 is provided between each moving block 72 and the axial sleeve 73 at the first sponge rubber roller 4, and a second linkage rod 722 is provided between each moving block 72 and the axial sleeve 73 at the second sponge rubber roller 5. The ends of each first linkage rod 721 and the second linkage rod 722 are rotatably connected to the corresponding moving block 72 and the axial sleeve 73.

[0042] When the moving block 72 in the transverse slide groove 23 on the guide frame 2 slides, since each moving block 72 is connected to the shaft sleeve 73 at the first sponge rubber roller 4 through the first linkage rod 721 and is connected to the shaft sleeve 73 at the second sponge rubber roller 5 through the second linkage rod 722, and the linkage rod and the moving block 72 and the shaft sleeve 73 are all connected in a rotating manner, when the moving block 72 slides in the transverse slide groove 23 along the horizontal direction, the power is transmitted to the shaft sleeve 73 at the first sponge rubber roller 4 through the first linkage rod 721, thereby driving the second sponge rubber roller 5. A sponge rubber roller 4 approaches or moves away from the surface of the fiber belt 1 perpendicularly. Similarly, while the moving block 72 slides, it will also transmit power to the shaft sleeve 73 at the second sponge rubber roller 5 through the second linkage rod 722, so that the second sponge rubber roller 5 moves in the opposite direction, thereby controlling the relative movement between the first sponge rubber roller 4 and the second sponge rubber roller 5, adjusting the squeezing force on the fiber belt 1, and reducing the vibration of the first sponge rubber roller 4 and the second sponge rubber roller 5, thereby improving the synchronous adjustment effect of the first sponge rubber roller 4 and the second sponge rubber roller 5.

[0043] See also Figure 1 , Figure 4 , Figure 5 , Fig. 9 and Fig.10 As shown, the tensioning adjustment mechanism 3 includes a tensioning roller 31, which is arranged on the guide frame 2 in the form of crossing the fiber belt 1, and the axial direction of the tensioning roller 31 is parallel to the axial direction of the first guide roller 21 and the second guide roller 22. A vertical slide groove 24 is opened on the guide frame 2 and corresponds to the position of the end of the tensioning roller 31. A slider 32 is slidably provided in the vertical slide groove 24, and the end of the tensioning roller 31 is rotatably connected to the slider 32. A lower pressure block 33 is also provided in the vertical slide groove 24 and above the slider 32, and a compression spring 331 is connected between the lower pressure block 33 and the slider 32.

[0044] The tension adjustment mechanism 3 also includes a tension sensor, which is fixed in the bearing seat of the tension roller 31 and is used to monitor the tension value of the fiber belt 1 in real time. The tension sensor can be a strain gauge or piezoelectric sensor. The tension sensor directly measures the tension value of the fiber belt and transmits it to the control system. The control system controls the start and stop of the single-axis cylinder 341 according to the information fed back by the tension sensor, so that the fiber belt always maintains the preset tension value, realizes accurate control of the tension of the fiber belt, and is conducive to improving the yield rate of the fiber belt. The tension fluctuation of the resin coating equipment is less than ±5N during high-speed production (15m / min).

[0045] When it is necessary to adjust the tension of the fiber band 1, the lower pressure block 33 is controlled to move. Since the lower pressure block 33 is connected to the slider 32 through the compression spring 331, when downward pressure is applied to the slider 32, the compression spring 331 is compressed and deformed, storing elastic potential energy. Under the action of the spring force, the slider 32 will move downward in the vertical slide groove 24 along the vertical direction. Since the slider 32 is rotationally connected to the end of the tensioning roller 31, the linear motion of the slider 32 will be converted into the up and down movement of the tensioning roller 31 along the axial direction. When the tensioning roller 31 moves downward or upward, under the support of the first guide roller 21 and the second guide roller 22, the stretching state of the fiber band 1 passing therethrough will be changed, thereby realizing the adjustment of the tension of the fiber band 1.

[0046] See also Figure 7-10 As shown, a connecting rod 34 is fixedly connected between the two lower pressing blocks 33 on the same side, and an elastic buckle 74 is provided on the linkage frame rod 71 extending toward the connecting rod 34. The elastic buckle 74 is a polyurethane buckle with an elastic coefficient of 5-10N / mm, and a snap-in socket 741 for the elastic buckle 74 to snap into is opened on the connecting rod 34.

[0047] When downward force is applied to the connecting rod 34, the two lower pressure blocks 33 move downward synchronously. Since the elastic buckle 74 on the linkage frame rod 71 is engaged in the bayonet 741 on the connecting rod 34, the linkage frame rod 71 also moves up and down synchronously with the connecting rod 34. As the connecting rod 34 moves downward, the tensioning degree of the tensioning roller 31 on the fiber belt 1 is controlled, and the first sponge rubber roller 4 is controlled to move downward, and the second sponge rubber roller 5 moves upward synchronously, which not only ensures the tension of the fiber belt 1, but also ensures that the resin is squeezed from the first sponge rubber roller 4 and the second sponge rubber roller 5 onto the surface of the fiber belt 1.

[0048] See also Figure 3 As shown, a single-axis cylinder 341 for pushing and pulling the connecting rod 34 is provided on both sides of the guide frame 2, the piston rod end of the single-axis cylinder 341 is rotatably connected to the connecting rod 34, and the cylinder body of the single-axis cylinder 341 is rotatably connected to the guide frame 2.

[0049] When the connecting rod 34 is controlled to move, the piston rod of the uniaxial cylinder 341 is extended and retracted to push and pull the connecting rod 34, thereby achieving the tensioning of the fiber band 1 and the coating of the resin.

[0050] See also Figure 1-Figure 5 As shown, a material receiving pool 8 for containing the second sponge rubber roller 5 is fixedly provided on the guide frame 2 and below the fiber belt 1 .

[0051] The receiving pool 8 collects and contains the excess liquid squeezed out by the first sponge rubber roller 4 and the second sponge rubber roller 5 during the working process, so that the surrounding environment of the equipment can be kept clean.

[0052] The present invention applies the resin in an extruded form by the first sponge rubber roller 4 and the second sponge rubber roller 5. Since the sponge rubber has good elasticity and liquid absorption, it can uniformly absorb and store the resin material, so that when the fiber tape 1 passes, the resin can be continuously and uniformly squeezed onto the surface of the fiber, ensuring the thickness consistency and quality stability of the prepreg. The resin is coated on the fiber tape 1 in a pressurized state, which helps the resin to better penetrate into the interior of the fiber and avoid waste caused by excessive coating, while also reducing splashing and dripping of the resin during the coating process.

[0053] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A resin coating device for glass fiber reinforced thermoplastic unidirectional prepreg tape, comprising a resin coating device, wherein the resin coating device comprises a guide frame (2) for a fiber tape (1) to pass through, a first guide roller (21) and a second guide roller (22) being rotatably mounted on both ends of the guide frame (2) along the winding direction of the fiber tape (1), the fiber tape (1) is wound in from above the first guide roller (21) and the second guide roller (22) in the direction of the unwinding frame, and is wound out from above the second guide roller (22) and the first guide roller (21) in the direction of the winding frame, a tensioning adjustment mechanism (3) located above the fiber tape (1) is provided between each first guide roller (21) and the corresponding second guide roller (22), and the device is characterized in that: The resin coating device further comprises a first sponge rubber roller (4) and a second sponge rubber roller (5) in the form of rollers. Both the first sponge rubber roller (4) and the second sponge rubber roller (5) are porous elastic structures. The pore size of the sponge rubber in the first sponge rubber roller (4) and the second sponge rubber roller (5) is in the range of 0.1-0.3 mm. The Shore hardness of the sponge rubber is in the range of 25-35 degrees. The first sponge rubber roller (4) and the second sponge rubber roller (5) are symmetrically arranged on the upper and lower surfaces of the fiber belt (1). The first sponge rubber roller (4) and the second sponge rubber roller (5) are located between the two tensioning adjustment mechanisms (3). A resin filling member (6) is coaxially fixedly connected at the center of the first sponge rubber roller (4) and the second sponge rubber roller (5). A bidirectional linkage member (7) for controlling the relative movement of the first sponge rubber roller (4) and the second sponge rubber roller (5) is provided between the two ends of the two resin filling members (6). The end of each resin filling member (6) is rotatably connected to the bidirectional linkage member (7).

2. The glass fiber reinforced thermoplastic unidirectional prepreg resin coating equipment according to claim 1, characterized in that: When the first sponge rubber roller (4) and the second sponge rubber roller (5) extrude the fiber band (1) synchronously, the first sponge rubber roller (4) and the second sponge rubber roller (5) rotate following the winding of the fiber band (1) and extrude the resin at the same time.

3. The glass fiber reinforced thermoplastic unidirectional prepreg resin coating equipment according to claim 2, characterized in that: The resin filling piece (6) is a hollow cylindrical structure, one end of the resin filling piece (6) is provided with a filling port (61), and a plurality of extrusion holes (62) communicating with the inner cavity of the resin filling piece (6) are evenly provided on the surface of the resin filling piece (6); A temperature sensor and an electric heating plate are arranged inside the resin filling piece (6). The temperature sensor monitors the temperature of the resin in the resin filling piece (6) and feeds back to the control system so that the resin in the resin filling piece (6) is maintained at 60-65°C. When the temperature of the resin in the resin filling piece (6) is lower than 60°C, the control system controls the electric heating plate to turn on to heat the resin in the resin filling piece (6). When the temperature of the resin in the resin filling piece (6) reaches 65°C, the control system controls the electric heating plate to turn off so that the resin in the resin filling piece (6) is maintained at 60-65°C to ensure good fluidity of the resin.

4. The glass fiber reinforced thermoplastic unidirectional prepreg resin coating equipment according to claim 3, characterized in that: A clamping block (63) protruding outward is respectively provided at both ends of the resin filling piece (6), and a notch for clamping with a corresponding clamping block (63) is respectively provided on the inner wall of the first sponge rubber roller (4) and the second sponge rubber roller (5).

5. The glass fiber reinforced thermoplastic unidirectional prepreg resin coating equipment according to claim 4, characterized in that: The bidirectional linkage member (7) comprises a linkage rod (71), one end of the linkage rod (71) being rotatably connected to the end of the resin filling member (6) above the fiber belt (1), and the other end of the linkage rod (71) being slidably connected to the end of the resin filling member (6) below the fiber belt (1), and a guide track (711) for sliding the resin filling member (6) connected to the second sponge rubber roller (5) is provided on the linkage rod (71) along its edge.

6. The glass fiber reinforced thermoplastic unidirectional prepreg resin coating equipment according to claim 5, characterized in that: A transverse sliding groove (23) is provided on the guide frame (2) along its horizontal direction. Two symmetrical moving blocks (72) are slidably connected in the transverse sliding groove (23). The end of each resin filling member (6) is fixedly connected to a shaft connection sleeve (73). A first linkage rod (721) is provided between each moving block (72) and the shaft connection sleeve (73) of the first sponge rubber roller (4). A second linkage rod (722) is provided between each moving block (72) and the shaft connection sleeve (73) of the second sponge rubber roller (5). The ends of each first linkage rod (721) and the second linkage rod (722) are rotatably connected to the corresponding moving block (72) and the shaft connection sleeve (73).

7. The glass fiber reinforced thermoplastic unidirectional prepreg tape resin coating equipment according to claim 6, characterized in that: The tensioning adjustment mechanism (3) comprises a tensioning roller (31), the tensioning roller (31) being arranged on the guide frame (2) in the form of crossing the fiber belt (1), the axial direction of the tensioning roller (31) being parallel to the axial directions of the first guide roller (21) and the second guide roller (22), a vertical slide groove (24) being provided on the guide frame (2) at a position corresponding to the end of the tensioning roller (31), a slider (32) being slidably provided in the vertical slide groove (24), the end of the tensioning roller (31) being rotatably connected to the slider (32), a lower pressing block (33) being further provided in the vertical slide groove (24) and located above the slider (32), a compression spring (331) being connected between the lower pressing block (33) and the slider (32); The tension adjustment mechanism (3) further comprises a tension sensor, which is fixed in a bearing seat of the tension roller (31) and is used to monitor the tension value of the fiber band (1) in real time. The tension sensor may be a strain gauge type or a piezoelectric sensor, and the tension sensor directly measures the tension value of the fiber band and transmits it to the control system. The control system controls the start and stop of the single-axis cylinder (341) according to the information fed back by the tension sensor, so that the fiber band always maintains a preset tension value, thereby achieving accurate control of the tension of the fiber band.

8. The glass fiber reinforced thermoplastic unidirectional prepreg tape resin coating equipment according to claim 7, characterized in that: A connecting rod (34) is fixedly connected between the two lower pressing blocks (33) on the same side. An elastic buckle (74) is provided on the linkage frame rod (71) and extends in the direction of the connecting rod (34). The elastic buckle (74) is a polyurethane buckle with an elastic coefficient of 5-10 N / mm. A buckle opening (741) for the elastic buckle (74) to be engaged is provided on the connecting rod (34).

9. The glass fiber reinforced thermoplastic unidirectional prepreg tape resin coating equipment according to claim 8, characterized in that: A single-axis cylinder (341) for pushing and pulling a connecting rod (34) is provided on both sides of the guide frame (2); the piston rod end of the single-axis cylinder (341) is rotatably connected to the connecting rod (34); and the cylinder body of the single-axis cylinder (341) is rotatably connected to the guide frame (2).

10. The glass fiber reinforced thermoplastic unidirectional prepreg tape resin coating equipment according to claim 9, characterized in that: A material receiving pool (8) for containing the second sponge rubber roller (5) is fixedly provided on the guide frame (2) and located below the fiber belt (1).

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