Melt impregnation equipment for continuous fiber reinforced thermoplastic resin

Abstract

The utility model discloses melt impregnation equipment for continuous fiber reinforced thermoplastic resin, which comprises a melt impregnation machine head, a pre-dispersion device and a melt impregnation device, and the pre-dispersion device comprises a first vibration piece, a plurality of first dispersion rollers and a plurality of second dispersion rollers, the first dispersing rollers and the second dispersing rollers are distributed in the pre-dispersing area at intervals in the first direction, the second dispersing rollers are located above the first dispersing rollers, the projections of the second dispersing rollers projected to the plane where the first dispersing rollers are located are located between the adjacent first dispersing rollers, and each second dispersing roller is connected with a first vibration piece. The first vibrating part is used for driving the second dispersing roller to generate vertical vibration amplitude; the melt impregnation device is arranged in the melt impregnation area and used for guiding the continuous fibers passing through the pre-dispersion area to penetrate through the melt impregnation area. Based on the structure, the purpose of dispersing the continuous fibers in the preset dispersing area with a small tension value can be achieved, and the problem of yarn breakage caused by too large tension of the continuous fibers can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of polymer material production, in particular to a melting impregnation device for continuous fiber reinforced thermoplastic resin. Background Art

[0002] Continuous fiber reinforced thermoplastic resin matrix composite material is a high-performance composite material prepared by a certain process with continuous fiber as reinforcement and thermoplastic resin as matrix. Since the reinforcing fiber is continuous, compared with short fiber or long fiber reinforced thermoplastic resin matrix composite materials, continuous fiber reinforced thermoplastic resin matrix composite materials have more excellent mechanical properties and mechanical properties, good specific stiffness and specific strength, high toughness, good impact resistance, high dimensional stability, corrosion resistance and low water absorption. Therefore, it is widely used in transportation, aerospace, sports equipment, industrial products and building materials.

[0003] The Chinese patent No. 201410036463.3 discloses a double-sided melt impregnation device and method for continuous fiber reinforced tape, in which a fiber pre-dispersion area, a resin impregnation fiber area and a fiber redispersion area are sequentially connected and communicated in the melt impregnation head, a pre-dispersion device is provided in the fiber pre-dispersion area, and a double-sided distribution channel for resin melt distribution is provided in the resin impregnation fiber area. However, the structural arrangement of the device is unreasonable, so that the continuous fiber cannot be melt-impregnated uniformly, fully and effectively, and it is also prone to yarn breakage, which cannot ensure the stability and efficiency of production. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a melt impregnation device for continuous fiber reinforced thermoplastic resin.

[0005] The present application provides a melt impregnation device for continuous fiber reinforced thermoplastic resin, comprising a melt impregnation head, wherein a fiber channel for continuous fibers to pass through is formed inside the melt impregnation head, wherein the fiber channel is divided into a pre-dispersion zone for heating and dispersing the continuous fibers and a melt impregnation zone for impregnating the continuous fibers, and a feed port communicating with the melt impregnation zone is provided on the melt impregnation head;

[0006] Also includes:

[0007] A pre-dispersing device, comprising a first vibrating member, a plurality of first dispersing rollers and a plurality of second dispersing rollers, wherein the first dispersing rollers and the second dispersing rollers are spaced apart in the pre-dispersing area along a first direction, and the second dispersing rollers are located above the first dispersing rollers, and the projections of the second dispersing rollers on the plane where the first dispersing rollers are located are located between adjacent first dispersing rollers, and each of the second dispersing rollers is connected to a first vibrating member, and the first vibrating member is used to drive the second dispersing rollers to generate an amplitude of up and down vibration;

[0008] A melt impregnation device is arranged in the melt impregnation zone and is used to guide the continuous fibers passing through the pre-dispersing zone to pass through the melt impregnation zone.

[0009] In one embodiment, the first dispersing roller and the second dispersing roller each include a dispersing roller body and a sleeve sleeved on the periphery of the dispersing roller body, a receiving space is formed between the sleeve and the dispersing roller body, and electric heating rods are distributed in a ring shape in the receiving space.

[0010] In one embodiment, the first vibrating member includes a first vibrator, a first roller shaft is provided at the end of the second dispersing roller, and the second dispersing roller is connected to the first vibrator through the first roller shaft so that the vibration generated by the first vibrator is transmitted to the second dispersing roller.

[0011] In one embodiment, the axial spacing between adjacent first dispersing rollers is between 10 mm and 200 mm; and / or,

[0012] The diameters of the first dispersing roller and the second dispersing roller are both between 10 mm and 100 mm.

[0013] In one embodiment, the ratio of the length of the pre-dispersion zone to the length of the melt impregnation zone is between 1 / 3 and 2 / 3.

[0014] In one embodiment, the melt impregnation device includes a second vibrating member, a plurality of first tension rollers, and a plurality of second tension rollers, the first tension roller and the second tension roller are both arranged in the melt impregnation area along a first direction, and the second tension roller is arranged above the first tension roller, the projection of the second tension roller on the plane where the first tension roller is located is located between adjacent first tension rollers, and each of the second tension rollers is connected to a second vibrating member, and the second vibrating member is used to drive the second tension roller to generate an amplitude of up and down vibration.

[0015] In one embodiment, the second vibrating member includes a second vibrator, a second roller shaft is provided at the end of the second tension roller, and the second tension roller is connected to the second vibrator through the second roller shaft, so that the vibration generated by the second vibrator is transmitted to the second tension roller.

[0016] In one embodiment, the number of the first tension rollers is 5 to 9; the number of the first dispersion rollers is 3 to 7.

[0017] In one embodiment, the feed port is in a trumpet shape or an inverted cone shape.

[0018] In one embodiment, the diameter of the feed port is between 2 mm and 10 mm.

[0019] Compared with the prior art, the above technical solution provided by the embodiment of the present application has the following beneficial effects:

[0020] The continuous fibers are pre-dispersed and heated in the pre-dispersing zone, and then enter the melt impregnation zone to be double-sidedly impregnated, and pass through the melt impregnation head, so that the resin is coated on the surface of the continuous fibers. Before entering the melt impregnation zone for impregnation, the continuous fibers are pre-dispersed by the pre-dispersing device, so that the flow of the resin melt in the melt impregnation zone is more uniform, and the impregnation effect on the continuous fibers is more balanced, which can achieve long-term continuous and stable production, and is conducive to improving the output and quality of the product. In addition, the pre-dispersing device also drives the second dispersing roller to vibrate through the first vibrating member, so that the contacting continuous fibers can be vibrated, so that the continuous fibers can be dispersed in the preset dispersion zone with a smaller tension value, which can effectively reduce the problem of yarn breakage caused by excessive tension of the continuous fibers. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a melt impregnation device for continuous fiber reinforced thermoplastic resin of the present application;

[0022] Figure 2 It is a structural schematic diagram of a first dispersion roller in a melt impregnation device for continuous fiber reinforced thermoplastic resin of the present application;

[0023] Figure 3 It is a schematic diagram of the connection between a first vibrating member and a second dispersing roller in a melt impregnation device for continuous fiber reinforced thermoplastic resin of the present application;

[0024] Figure 4 It is a schematic diagram of the connection between a second vibrating member and a second tension roller in a melt impregnation device for continuous fiber reinforced thermoplastic resin of the present application.

[0025] Numbers in the figure:

[0026] 10. Melt impregnation head; 10a. Feed inlet; 11. Pre-dispersion zone; 12. Melt impregnation zone; 20. Pre-dispersion device; 21. First dispersion roller; 211. Dispersion roller body; 212. Bushing; 22. Second dispersion roller; 23. First vibrating member; 24. First roller shaft; 30. Melt impregnation device; 31. First tension roller; 32. Second tension roller; 33. Second vibrating member; 34. Second roller shaft; 50. Accommodation space; 60. Electric heating rod. DETAILED DESCRIPTION

[0027] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0028] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] Please refer to Figure 1 The embodiment of the present application provides a melt impregnation device for continuous fiber reinforced thermoplastic resin, which includes a melt impregnation head 10, a pre-dispersing device 20 and a melt impregnation device 30. A fiber channel for continuous fiber passing through is formed inside the melt impregnation head 10. The fiber channel is divided into a pre-dispersing area 11 for heating and dispersing the continuous fiber and a melt impregnation area 12 for impregnating the continuous fiber. The melt impregnation head 10 is provided with a feed port 10a communicating with the melt impregnation area 12. The pre-dispersing device 20 includes a first vibrating member 23, a plurality of first dispersing rollers 21 and a plurality of second dispersing rollers 22. The first dispersing rollers 21 and the second dispersing rollers 22 are both distributed in the pre-dispersing area 11 at intervals along a first direction, and the second dispersing rollers 22 are located above the first dispersing rollers 21, and the projection of the second dispersing rollers 22 on the plane where the first dispersing rollers 21 are located is located between adjacent first dispersing rollers 21. Each second dispersing roller 22 is connected to a first vibrating member 23, and the first vibrating member 23 is used to drive the second dispersing rollers 22 to generate an amplitude of up and down vibration. The melt impregnation device 30 is disposed in the melt impregnation zone 12 and is used to guide the continuous fibers passing through the pre-dispersion zone 11 to pass through the melt impregnation zone 12 . The melt impregnation head 10 is provided with a feed port 10 a communicating with the melt impregnation zone 12 .

[0030] Exemplarily, the interior of the melt impregnation head 10 can be divided into a connected pre-dispersion zone 11 and a melt impregnation zone 12 by a partition bar. The continuous fiber enters the pre-dispersion zone 11 from the feed end of the melt impregnation head, and is dispersed and heated under the action of the pre-dispersion device 20, and then enters the melt impregnation zone 12, and passes through the melt impregnation zone 12 under the action of the melt impregnation device 30, and finally passes out from the discharge end of the melt impregnation head, so that the surface of the continuous fiber is coated with resin, which has better mechanical properties and higher impact resistance.

[0031] It should be noted that the "first direction" mentioned above refers to the direction in which the continuous fibers are laid. Figure 1 The X direction in .

[0032] Exemplarily, the first dispersing roller 21 and the second dispersing roller 22 may both be driven by non-powered components and only rotate under the pull of the continuous fibers; alternatively, a power component may be used to drive the first dispersing roller 21 and the second dispersing roller 22 to rotate so as to give the continuous fibers a certain traction force, which is beneficial to improving the stability of the continuous fibers passing through the fiber channel.

[0033] Exemplarily, the first vibrator 23 drives the second dispersion roller 22 to generate an amplitude of up and down vibration, so that the second dispersion roller 22 can give the contacting continuous fibers a vibration, thereby allowing the continuous fibers to achieve the goal of dispersion with a smaller tension value in the preset dispersion area, which can effectively reduce the problem of yarn breakage caused by excessive tension of the continuous fibers. In addition, it should be noted that the first vibrator 23 can be a power component in the prior art that can drive the second dispersion roller 22 to generate vibration, and this is not limited. At the same time, the amplitude of the second dispersion roller 22 can be set according to the production needs.

[0034] The melt impregnation equipment of continuous fiber reinforced thermoplastic resin based on the above technical features pre-disperses and heats the continuous fibers in the pre-dispersing zone 11, and then enters the melt impregnation zone 12 to impregnate the continuous fibers on both sides, and passes through the melt impregnation head 10, so as to coat the resin on the surface of the continuous fibers. Before entering the melt impregnation zone 12 for impregnation, the continuous fibers are pre-dispersed by the pre-dispersing device 20, so that the flow of the resin melt in the melt impregnation zone 12 is more uniform, and the impregnation effect on the continuous fibers is more balanced, which can achieve long-term continuous and stable production, and is conducive to improving the output and quality of the product. In addition, the pre-dispersing device 20 also drives the second dispersing roller 22 to vibrate through the first vibrating member 23, so that the contacting continuous fibers can be given a vibration, so that the continuous fibers can be dispersed in the preset dispersion zone with a smaller tension value, which can effectively reduce the problem of yarn breakage caused by excessive tension of the continuous fibers.

[0035] Please refer to Figure 2 In one embodiment, the first dispersing roller 21 and the second dispersing roller 22 each include a dispersing roller body 211 and a sleeve 212 sleeved on the periphery of the dispersing roller body 211, and an accommodating space 50 is formed between the sleeve 212 and the dispersing roller body 211, and electric heating rods 60 are distributed in a ring shape in the accommodating space 50.

[0036] For example, by defining a receiving space 50 between the sleeve 212 and the dispersion roller body 211, and distributing the electric heating rod 60 in a ring shape in the receiving space 50, the electric heating rod 60 can be controlled to generate heat, and then the heat is transferred to the surface of the sleeve, so that the continuous fiber is heated by the heat on the sleeve surface, ensuring the effect of subsequent impregnation in the melt impregnation zone 12. In addition, the heating temperature of the electric heating rod 60 is between 60°C and 400°C.

[0037] Please refer to Figure 3 In one embodiment, the first vibrating member 23 includes a first vibrator, a first roller shaft 24 is provided at the end of the second dispersing roller 22, and the second dispersing roller 22 is connected to the first vibrator through the first roller shaft 24 so that the vibration generated by the first vibrator is transmitted to the second dispersing roller 22.

[0038] For example, the first vibrator is used to generate vibration. Since the second dispersing roller 22 is connected to the first vibrator through the first roller shaft 24, the generated vibration is transmitted to the second dispersing roller 22 through the first roller shaft 24 and acts on the continuous fibers, so that the continuous fibers can be dispersed with a smaller tension value in a preset dispersing area, which can effectively reduce the problem of yarn breakage caused by excessive tension of the continuous fibers.

[0039] In one embodiment, the axial spacing between adjacent first dispersing rollers 21 is between 10 mm and 200 mm; and / or the diameters of the first dispersing roller 21 and the second dispersing roller 22 are between 10 mm and 100 mm.

[0040] In one embodiment, the ratio of the length of the pre-dispersion zone 11 to the length of the melt impregnation zone 12 is between 1 / 3 and 2 / 3. In this way, it can be ensured that the continuous fibers can be fully dispersed before impregnation, which is beneficial to improving the subsequent impregnation effect.

[0041] In one embodiment, the melt impregnation device 30 includes a second vibrating member 33, a plurality of first tension rollers 31, and a plurality of second tension rollers 32. The first tension rollers 31 and the second tension rollers 32 are both arranged in the melt impregnation zone 12 along the first direction, and the second tension rollers 32 are arranged above the first tension rollers 31. The projection of the second tension rollers 32 on the plane where the first tension rollers 31 are located is located between adjacent first tension rollers 31. Each second tension roller 32 is connected to a second vibrating member 33, and the second vibrating member 33 is used to drive the second tension rollers 32 to generate an amplitude of up and down vibration.

[0042] Exemplarily, the second vibrator 33 drives the second tension roller 32 to generate an amplitude of up and down vibration, so that the second tension roller 32 can give the contacting continuous fibers a vibration, thereby allowing the continuous fibers to be more evenly dispersed in the molten resin, and can also drive the surrounding resin to flow, which can significantly improve the impregnation effect of the continuous fibers. In addition, it should be noted that the second vibrator 33 can be a power component in the prior art that can drive the second tension roller 32 to vibrate, and this is not limited. At the same time, the amplitude of the second tension roller 32 can be set according to the production needs.

[0043] In one embodiment, the second vibrating member 33 includes a second vibrator, a second roller shaft 34 is provided at the end of the second dispersing roller 22, and the second dispersing roller 22 is connected to the second vibrator through the second roller shaft 34 so that the vibration generated by the second vibrator is transmitted to the second tension roller 32.

[0044] Exemplarily, the second vibrator is used to generate vibration. Since the second tension roller 32 is connected to the second vibrator via the second roller shaft 34, the generated vibration is transmitted to the second tension roller 32 via the second roller shaft 34 and acts on the continuous fibers. Therefore, the continuous fibers can be more evenly dispersed in the molten resin, and the surrounding resin can be driven to flow, which can significantly improve the impregnation effect of the continuous fibers.

[0045] In one embodiment, the number of the first tension rollers 31 is 5 to 9; the number of the first dispersion rollers 21 is 3 to 7.

[0046] In one embodiment, the feed port 10a is trumpet-shaped or inverted cone-shaped, and the diameter of the feed port 10a is between 2 mm and 10 mm. Thus, setting the feed port in a trumpet-shaped or inverted cone-shaped manner can facilitate the subsequent melt to pass into the melt impregnation zone 12.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A melt impregnation device for continuous fiber reinforced thermoplastic resin, characterized in that: The melt impregnation die head comprises a fiber channel for continuous fibers to pass through formed inside the melt impregnation die head, the fiber channel is divided into a pre-dispersion zone for heating and dispersing the continuous fibers and a melt impregnation zone for impregnating the continuous fibers, and the melt impregnation die head is provided with a feed port communicating with the melt impregnation zone; Also includes: A pre-dispersing device, comprising a first vibrating member, a plurality of first dispersing rollers and a plurality of second dispersing rollers, wherein the first dispersing rollers and the second dispersing rollers are spaced apart in the pre-dispersing area along a first direction, and the second dispersing rollers are located above the first dispersing rollers, and the projections of the second dispersing rollers on the plane where the first dispersing rollers are located are located between adjacent first dispersing rollers, and each of the second dispersing rollers is connected to a first vibrating member, and the first vibrating member is used to drive the second dispersing rollers to generate an amplitude of up and down vibration; A melt impregnation device is arranged in the melt impregnation zone and is used to guide the continuous fibers passing through the pre-dispersing zone to pass through the melt impregnation zone.

2. The melt impregnation equipment for continuous fiber reinforced thermoplastic resin according to claim 1, characterized in that: The first dispersing roller and the second dispersing roller both include a dispersing roller body and a shaft sleeve sleeved on the periphery of the dispersing roller body, a receiving space is formed between the shaft sleeve and the dispersing roller body, and electric heating rods are distributed in a ring shape in the receiving space.

3. The melt impregnation equipment for continuous fiber reinforced thermoplastic resin according to claim 1, characterized in that: The first vibrating member includes a first vibrator, a first roller shaft is provided at the end of the second dispersing roller, and the second dispersing roller is connected to the first vibrator through the first roller shaft, so that the vibration generated by the first vibrator is transmitted to the second dispersing roller.

4. The melt impregnation equipment for continuous fiber reinforced thermoplastic resin according to claim 1, characterized in that: The axial distances between adjacent first dispersing rollers are between 10 mm and 200 mm; and / or, The diameters of the first dispersing roller and the second dispersing roller are both between 10 mm and 100 mm.

5. The melt impregnation equipment for continuous fiber reinforced thermoplastic resin according to claim 1, characterized in that: The ratio of the length of the pre-dispersion zone to the length of the melt impregnation zone is between 1 / 3 and 2 / 3.

6. The melt impregnation equipment for continuous fiber reinforced thermoplastic resin according to claim 1, characterized in that: The melt impregnation device includes a second vibrating member, a plurality of first tension rollers and a plurality of second tension rollers, the first tension roller and the second tension roller are both arranged in the melt impregnation area along a first direction, and the second tension roller is arranged above the first tension roller, the projection of the second tension roller on the plane where the first tension roller is located is located between adjacent first tension rollers, and each of the second tension rollers is connected to a second vibrating member, and the second vibrating member is used to drive the second tension roller to generate an amplitude of up and down vibration.

7. The melt impregnation equipment for continuous fiber reinforced thermoplastic resin according to claim 6, characterized in that: The second vibrating member includes a second vibrator. A second roller shaft is provided at the end of the second tension roller. The second tension roller is connected to the second vibrator through the second roller shaft so that the vibration generated by the second vibrator is transmitted to the second tension roller.

8. The melt impregnation equipment for continuous fiber reinforced thermoplastic resin according to claim 6, characterized in that: The number of the first tension rollers is 5 to 9; the number of the first dispersion rollers is 3 to 7.

9. The melt impregnation equipment for continuous fiber reinforced thermoplastic resin according to claim 1, characterized in that: The feed inlet is in a trumpet shape or an inverted cone shape.

10. The melt impregnation equipment for continuous fiber reinforced thermoplastic resin according to claim 9, characterized in that: The diameter of the feed port is between 2 mm and 10 mm.

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