Preparation device of continuous fiber fabric reinforced thermoplastic composite board

Abstract

The embodiment of the utility model provides a preparation device of a continuous fiber fabric reinforced thermoplastic composite board, and the preparation device comprises a continuous fiber fabric providing unit which is used for providing a continuous fiber fabric; the resin infiltration unit is suitable for receiving the continuous fiber fabric provided by the continuous fiber fabric providing unit and infiltrating the continuous fiber fabric with thermoplastic resin, and the resin infiltration unit comprises a resin providing device suitable for coating one or two surfaces of the continuous fiber fabric with the thermoplastic resin; the pressing device is suitable for pressing the thermoplastic resin and the continuous fiber fabric; and the heating device is suitable for heating the thermoplastic resin in the pressing process. The composite board prepared by the preparation device has good mechanical properties and smoothness.

Description

Technical Field

[0001] The present disclosure relates to the field of fiber composite materials, and in particular to a preparation device for a continuous fiber fabric reinforced thermoplastic composite plate. Background Art

[0002] Continuous fiber reinforced thermoplastic composites have been favored by the composite materials industry due to their low material cost, manufacturing cost, excellent comprehensive performance, and complete recyclability. With the continuous development of the manufacturing technology of continuous fiber reinforced thermoplastic composites and the application of downstream products, the application of continuous fiber reinforced thermoplastic composites in the fields of automobiles, sports equipment, construction, transportation, industry, medical treatment, and boats has gradually expanded.

[0003] Continuous fiber fabrics are often used in thermoplastic composites due to their good processability. However, the thermoplastic resin matrix is ​​a high molecular weight polymer with a large melt viscosity and low fluidity. Therefore, when the thermoplastic resin impregnates the continuous fiber fabric, there is a problem of poor impregnation effect, which in turn affects the performance of the final continuous fiber reinforced thermoplastic composite material.

[0004] One way to improve the resin impregnation effect is to increase the equipment impregnation pressure. However, too high a pressure will affect the regularity of the fiber and even cause the fiber to break. Another way is to modify the thermoplastic resin, which is a relatively complicated process.

[0005] Continuous fiber fabric reinforced thermoplastic composites can usually be prepared using a press, which laminates and molds the thermoplastic resin film and fiber fabric, including two processes of thermal lamination and cooling. It is a batch production with complex processes, low production efficiency and high energy consumption. In addition, the fluidity of the thermoplastic resin film will affect the effect of the resin impregnation of the continuous fiber fabric. At the same time, due to the size limitation of the press, it is impossible to produce oversized composite panels.

[0006] Continuous fiber fabric reinforced thermoplastic composites can usually be prepared using continuous Teflon belt machines and continuous Teflon steel belt machines. This process requires continuous compounding of thermoplastic resin film and fiber fabric. The poor fluidity of thermoplastic resin film will lead to poor resin impregnation. In addition, since the surface quality of Teflon belts and steel belts cannot be controlled, the surface of the composite sheet cannot meet higher appearance product requirements. At the same time, the production heating section is long, the compounding speed is slow, and the energy consumption is high.

[0007] Therefore, it is necessary to develop a new preparation device for continuous fiber fabric reinforced thermoplastic composite panels. Utility Model Content

[0008] In order to solve the above-mentioned technical problems, an embodiment of the present disclosure provides a preparation device for a continuous fiber fabric reinforced thermoplastic composite plate, the preparation device comprising: a continuous fiber fabric providing unit, used to provide a continuous fiber fabric; a resin impregnation unit, suitable for receiving the continuous fiber fabric provided by the continuous fiber fabric providing unit, and impregnating the continuous fiber fabric with a thermoplastic resin, the resin impregnation unit comprising: a resin providing device, suitable for coating the thermoplastic resin on one side or both sides of the continuous fiber fabric; a pressing device, suitable for pressing the thermoplastic resin and the continuous fiber fabric; a heating device, suitable for heating the thermoplastic resin during the pressing process.

[0009] In some embodiments, the continuous fiber fabric providing unit includes: a transition flattening device, used to transmit and flatten the continuous fiber fabric so that the directions of the fibers of the continuous fiber fabric entering the resin impregnation unit are regular, and the transition flattening device includes: a pre-pulling roller assembly, including at least two pre-pulling rollers, and the pre-pulling rollers are suitable for pulling the continuous fiber fabric from both sides of the continuous fiber fabric in cooperation with each other; a flattening roller assembly, including at least one flattening roller, used to flatten the continuous fiber fabric.

[0010] In some embodiments, the continuous fiber fabric providing unit further includes: a pre-treatment device, adapted to perform an impregnation treatment on the continuous fiber fabric with an impregnating agent before the continuous fiber fabric is transmitted into the transition flattening device.

[0011] In some embodiments, the continuous fiber fabric providing unit further includes: a wetting agent activation device, adapted to provide heat to the continuous fiber fabric treated by the pretreatment device, so as to activate the wetting agent impregnated in the continuous fiber fabric.

[0012] In some embodiments, the sizing agent activation device includes: an infrared oven.

[0013] In some embodiments, the lamination device comprises at least two lamination rollers.

[0014] In some embodiments, the lamination roller is made of metal, and hot oil or steam is suitable for passing into the interior of the lamination roller to maintain the temperature of the lamination roller.

[0015] In some embodiments, the heating device is an oven, and the pressing device is located inside the oven.

[0016] In some embodiments, the heating device is an infrared oven.

[0017] In some embodiments, the preparation device further includes: a cooling unit for receiving the continuous fiber fabric passing through the resin impregnation unit and cooling the thermoplastic resin impregnated in the continuous fiber fabric.

[0018] In some embodiments, the cooling unit comprises: at least one pair of cooling rollers, wherein the at least one pair of cooling rollers are adapted to cooperate with each other to squeeze and cool the thermoplastic resin from both sides of the continuous fiber fabric.

[0019] In some embodiments, the cooling roller is position adjustable.

[0020] In some embodiments, the cooling unit further comprises: an air cooling device or a water cooling device, adapted to further cool the continuous fiber fabric impregnated with the thermoplastic resin cooled by the cooling roller.

[0021] In some embodiments, the resin providing device includes: a first coating device and a second coating device, which are suitable for coating the thermoplastic resin on both sides of the continuous fiber fabric.

[0022] In some embodiments, the first coating device and the second coating device respectively include: a double-layer co-extrusion die head, suitable for coating two layers of thermoplastic resin on both sides of the continuous fiber fabric respectively.

[0023] In some embodiments, the continuous fiber fabric providing unit also includes: at least one transition roller, one of which is used to change the transmission direction of the continuous fiber fabric from a horizontal direction to a vertical direction; the first coating device and the second coating device are relatively arranged on both sides of the continuous fiber fabric, and are suitable for coating the thermoplastic resin to both sides of the continuous fiber fabric when the continuous fiber fabric passes in a vertical direction.

[0024] In some embodiments, the laminating device includes three laminating rollers, and a line connecting the roller axes of the cross sections of the three laminating rollers is at right angles, so that the continuous fiber fabric transmitted in the vertical direction is converted into horizontal transmission after passing through the three laminating rollers.

[0025] In some embodiments, the preparation device further includes: a flip unit, which is suitable for flipping the horizontally transmitted continuous fiber fabric, so that the directions of the two sides of the continuous fiber fabric are replaced, and the continuous fiber fabric is continuously transmitted in the horizontal direction; the first coating device is arranged before the flip unit, and is suitable for coating one side of the continuous fiber fabric before flipping with a thermoplastic resin; the second coating device is arranged after the flip unit, and is suitable for coating the other side of the flipped continuous fiber fabric with a thermoplastic resin; the laminating device includes: a first laminating roller assembly and a second laminating roller assembly, and the first laminating roller assembly and the second laminating roller assembly respectively include to At least two laminating rollers, the first laminating roller assembly is arranged between the first coating device and the flip unit, and is suitable for laminating the thermoplastic resin coated on one side of the continuous fiber fabric with the continuous fiber fabric; the second laminating roller assembly is arranged after the second coating device, and is suitable for laminating the thermoplastic resin coated on the other side of the continuous fiber fabric with the continuous fiber fabric; the heating device comprises: a first heating device, suitable for heating the thermoplastic resin when the first laminating roller assembly is laminating; a second heating device, suitable for heating the thermoplastic resin when the second laminating roller assembly is laminating.

[0026] In some embodiments, the flipping unit includes two flipping rollers, which are suitable for horizontally flipping the continuous fiber fabric horizontally transported through the first coating device and then continuously transporting it horizontally to the second coating device.

[0027] In some embodiments, the first lamination roller assembly includes: three lamination rollers arranged in a horizontal direction; the second lamination roller assembly includes: three lamination rollers arranged in a horizontal direction.

[0028] Compared with the prior art, the technical solution of the embodiment of the present disclosure has the following beneficial effects:

[0029] The resin impregnation unit of the device for preparing the continuous fiber fabric reinforced thermoplastic composite plate of the embodiment of the present disclosure includes a heating device, which is suitable for heating the thermoplastic resin during the pressing process of the continuous fiber fabric coated with the thermoplastic resin to improve the fluidity of the thermoplastic resin, thereby improving the wettability of the thermoplastic resin to the continuous fiber fabric and improving the mechanical strength of the composite plate.

[0030] Furthermore, the lamination is performed with a lamination roller, and the continuous fiber fabric is subjected to pressure only when it contacts the lamination roller, thereby avoiding prolonged pressure during the lamination process, which is beneficial to maintaining the regularity of the continuous fiber fabric and sufficient lamination and impregnation of the thermoplastic resin in the continuous fiber fabric.

[0031] Furthermore, the continuous fiber fabric providing unit of the embodiment of the present disclosure pre-pulls and flattens the continuous fiber fabric through a transition flattening device so that the directions of the fibers of the continuous fiber fabric entering the resin impregnation unit are regular, thereby being more conducive to the thermoplastic resin impregnating the continuous fiber fabric.

[0032] Furthermore, the thermoplastic resin impregnated in the continuous fiber fabric after lamination is quickly cooled and shaped by the cooling roller of the embodiment of the present invention, and further cooled by a water cooling device or an air cooling device to remove internal stress. The prepared composite plate has no warping problem and has excellent surface flatness, reaching the A-level surface standard.

[0033] Furthermore, the first coating device and the second coating device of the embodiment of the present disclosure are relatively arranged on both sides of the continuous fiber fabric, and are suitable for uniformly coating the thermoplastic resin on both sides of the continuous fiber fabric when the continuous fiber fabric passes in a vertical direction, so as to facilitate the subsequent pressing device to press and uniformly impregnate the thermoplastic resin with the continuous fiber fabric.

[0034] Furthermore, the first coating device and the second coating device of the embodiment of the present disclosure are respectively arranged in front and behind the flip unit, and the thermoplastic resin is coated on both sides of the horizontally transmitted continuous fiber fabric respectively. The coating is not affected by gravity, so that the thermoplastic resin is coated on both sides of the continuous fiber fabric successively. The evenly coated thermoplastic resin is conducive to the pressing device to press the thermoplastic resin and the continuous fiber fabric and evenly impregnate them.

[0035] Furthermore, the pretreatment device and the sizing agent activation device of the embodiment of the present disclosure improve the interfacial bonding between the continuous fiber fabric and the thermoplastic resin by using the sizing agent to saturate the continuous fiber fabric and activate the sizing agent, thereby improving the mechanical strength of the composite board. In addition, the sizing agent saturation and heating activation of the continuous fiber fabric has lower production costs and easier operation than modifying the thermoplastic resin.

[0036] Furthermore, the resin providing device of the embodiment of the present disclosure includes a double-layer co-extrusion die head, which is suitable for coating two layers of thermoplastic resin on one side or both sides of the continuous fiber fabric, and the two layers of thermoplastic resin are stacked on the surface of the continuous fiber fabric and have different compositions. The mechanical properties, wear resistance, and interface adhesion between the thermoplastic resin and the continuous fiber fabric of the composite plate are adjusted by the double-layer thermoplastic resin with different compositions, thereby improving the overall performance of the composite plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Other features and advantages of the present disclosure will be better understood through the following detailed description of the optional embodiments in conjunction with the accompanying drawings, in which the same reference numerals represent the same or similar components, wherein:

[0038] Figure 1A schematic diagram of an embodiment of a preparation device for a continuous fiber fabric reinforced thermoplastic composite plate according to an embodiment of the present disclosure is shown;

[0039] Figure 2 A schematic diagram of another embodiment of a device for preparing a continuous fiber fabric reinforced thermoplastic composite panel according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0040] Embodiments of the present disclosure are described in detail below, and examples of the embodiments are shown in the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present disclosure, and cannot be understood as limiting the present disclosure.

[0041] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the present disclosure belongs. In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present disclosure.

[0042] An embodiment of the present disclosure provides a device for preparing a continuous fiber fabric reinforced thermoplastic composite plate, which is described in detail below with reference to the accompanying drawings.

[0043] Figure 1 A schematic diagram of an embodiment of a device for preparing a continuous fiber fabric reinforced thermoplastic composite plate according to an embodiment of the present disclosure is shown. Figure 1 , the preparation device of the continuous fiber fabric reinforced thermoplastic composite plate of the embodiment of the present disclosure includes:

[0044] A continuous fiber fabric providing unit 1, used for providing a flat continuous fiber fabric;

[0045] The resin impregnation unit 2 is adapted to receive the continuous fiber fabric provided by the continuous fiber fabric providing unit 1 and impregnate the continuous fiber fabric with a thermoplastic resin. The resin impregnation unit 2 comprises:

[0046] A resin providing device 201, adapted to apply the thermoplastic resin to one or both sides of the continuous fiber fabric;

[0047] A pressing device 202, adapted to press the thermoplastic resin coated on the continuous fiber fabric with the continuous fiber fabric;

[0048] The heating device 203 is suitable for heating the thermoplastic resin during the lamination process.

[0049] In the device for preparing the continuous fiber fabric reinforced thermoplastic composite plate of the embodiments of the present disclosure, in some embodiments, the continuous fiber fabric providing unit 1 includes: a transition flattening device 101, which is used to transmit and flatten the continuous fiber fabric so that the directions of the fibers of the continuous fiber fabric entering the resin impregnation unit 2 are regular.

[0050] The transition flattening device 101 includes: a pre-traction roller assembly 1011, which is used to provide traction force to the continuous fiber fabric, and the pre-traction roller assembly 1011 includes at least two pre-traction rollers, which are relatively arranged on both sides of the continuous fiber fabric and are suitable for pulling the continuous fiber fabric from both sides of the continuous fiber fabric in cooperation with each other. Due to the traction effect of the pre-traction roller on the continuous fiber fabric, the continuous fiber fabric is gradually subjected to traction force, rather than suddenly subjected to a large traction force to cause the fiber direction to change, thereby avoiding the change of the direction of each fiber when the continuous fiber fabric is pulled, resulting in irregular fiber arrangement, and further avoiding the problems of poor subsequent thermoplastic resin impregnation effect due to irregular fiber direction and uneven surface of the composite board formed after the thermoplastic resin impregnation.

[0051] The transition flattening device 101 further includes: a flattening roller assembly 1012, including at least one flattening roller, for flattening the continuous fiber fabric. The flattening roller assembly 1012 is beneficial for further regularizing the directions of the fibers of the continuous fiber fabric and flattening the surface of the continuous fiber fabric.

[0052] In some embodiments, the flattening roller assembly 1012 is disposed after the pre-traction roller assembly 1011 , that is, the continuous fiber fabric is first pre-tractioned by the pre-traction roller assembly 1011 , and then the continuous fiber fabric is flattened by the flattening roller assembly 1012 .

[0053] In some embodiments, in order to make the traction force on the continuous fiber fabric more uniform, the pre-traction roller assembly 1011 may include multiple groups of pre-traction rollers with a certain interval, and each group of pre-traction rollers includes at least two pre-traction rollers.

[0054] In some embodiments, the continuous fiber fabric providing unit 1 further includes: at least one transition roller 104, wherein one transition roller 104 is disposed after the pre-traction roller assembly 1011, and is used to change the transmission direction of the continuous fiber fabric from a horizontal direction to a vertical direction.

[0055] In some embodiments, reference Figure 1The transition roller 104 and the flattening roller assembly 1012 arranged after the pre-traction roller assembly 1011 are arranged on opposite sides of the continuous fiber fabric, and are suitable for cooperating with each other to flatten the two sides of the continuous fiber fabric. At the same time, the continuous fiber fabric turns 90 degrees after passing through the transition roller 104, changing from horizontal transmission to vertical transmission.

[0056] In the device for preparing the continuous fiber fabric reinforced thermoplastic composite plate of the embodiments of the present disclosure, in some embodiments, the continuous fiber fabric providing unit 1 further includes: a pretreatment device 102, suitable for impregnating the continuous fiber fabric with an impregnating agent before the continuous fiber fabric is transmitted into the transition flattening device 101.

[0057] In some embodiments, the pretreatment device 102 includes an infiltration tank (not shown) in which an infiltration agent is stored. When the continuous fiber fabric is infiltrated, the continuous fiber fabric is immersed in the infiltration tank for infiltration, so that the infiltration agent infiltrates the continuous fiber fabric.

[0058] In some embodiments, the wetting agent is selected and proportioned according to the type of thermoplastic resin. The wetting agent can be a single substance or multiple substances, or a solution of a single substance or a mixed solution of multiple substances. In some embodiments, the wetting agent includes: at least one of a silane coupling agent, a film former, a cross-linking agent, a compatibilizer and an antistatic agent. In some embodiments, the wetting agent is a water-soluble wetting agent, which exists in the form of an aqueous solution, and the mass fraction of the wetting agent in the aqueous solution is 5% to 10%. The wetting agent includes: 5% to 10% of a silane coupling agent, 30% to 70% of a film former, 5% to 20% of a cross-linking agent, 1% to 10% of a compatibilizer, and 2% to 5% of an antistatic agent.

[0059] In some embodiments, the pretreatment device 102 further includes a drying device for drying the continuous fiber fabric impregnated with the sizing agent to evaporate the water, which is more conducive to winding or subsequent flattening and impregnation with thermoplastic resin.

[0060] In some embodiments, the continuous fiber fabric providing unit 1 further comprises an unwinding device 105 for receiving the continuous fiber fabric processed by the pre-processing device 102 and rolling it up for storage, and is suitable for actively unwinding to transfer the continuous fiber fabric to the transition flattening device 101 .

[0061] In the device for preparing the continuous fiber fabric reinforced thermoplastic composite plate of the embodiments of the present disclosure, in some embodiments, the continuous fiber fabric providing unit 1 also includes: an impregnating agent activation device 103, suitable for providing heat to the continuous fiber fabric treated by the pretreatment device 102, so that the impregnating agent impregnated in the continuous fiber fabric is activated, and the activated impregnating agent is more conducive to the thermoplastic resin impregnating the continuous fiber fabric.

[0062] In some embodiments, the sizing agent activation device 103 comprises: an infrared oven. In some embodiments, the infrared oven is suitable for providing a temperature environment of 20° C. to 450° C. to activate the sizing agent.

[0063] In some embodiments, the sizing agent activation device 103 is disposed on a path where the continuous fiber fabric is transported in a vertical direction, such as Figure 1 As shown; in some other embodiments, the sizing agent activation device 103 is disposed on a path where the continuous fiber fabric is transported in a horizontal direction; this is not limited here.

[0064] In the apparatus for preparing the continuous fiber fabric reinforced thermoplastic composite plate of the disclosed embodiments, in some embodiments, the resin providing device 201 includes: a first coating device 2011 and a second coating device 2012, which are suitable for coating the thermoplastic resin on both sides of the continuous fiber fabric.

[0065] refer to Figure 1 The first coating device 2011 and the second coating device 2012 are arranged oppositely on both sides of the continuous fiber fabric, and are suitable for coating the thermoplastic resin on both sides of the continuous fiber fabric when the continuous fiber fabric passes in a vertical direction.

[0066] In some embodiments, the first coating device 2011 includes an extrusion die, and the second coating device 2012 includes an extrusion die. The extrusion die of the first coating device 2011 and the extrusion die of the second coating device 2012 are set at the same height to coat the thermoplastic resin on both surfaces of the continuous fiber fabric at the same height.

[0067] The width of the extrusion port of the extrusion die corresponds to the width of the continuous fiber fabric, so that the extrusion die can evenly coat the thermoplastic resin on both surfaces of the continuous fiber fabric, thereby facilitating the subsequent uniform infiltration of the continuous fiber fabric with the thermoplastic resin.

[0068] In some embodiments, the first coating device 2011 is an extruder, and the second coating device 2012 is an extruder.

[0069] In some embodiments, the extrusion die heads of the first coating device 2011 and the second coating device 2012 are double-layer co-extrusion dies, which are suitable for coating two layers of thermoplastic resin on the surface of the continuous fiber fabric. The two layers of thermoplastic resin are stacked on the surface of the continuous fiber fabric and have different compositions. The mechanical properties, wear resistance, and interface adhesion between the thermoplastic resin and the continuous fiber fabric of the composite plate are adjusted by using the double-layer thermoplastic resins with different compositions, thereby improving the overall performance of the prepared composite plate.

[0070] In the preparation device of the continuous fiber fabric reinforced thermoplastic composite plate of the embodiment of the present disclosure, in some embodiments, the heating device 203 of the resin impregnation unit 2 is an oven, and the pressing device 202 of the resin impregnation unit 2 is located in the oven, which is suitable for receiving and pressing the continuous fiber fabric coated with thermoplastic resin by the resin providing device 201. In some embodiments, the heating device 203 of the resin impregnation unit 2 is an infrared oven, which is arranged below the pressing device 202.

[0071] Since the pressing device 202 is arranged in the oven, it is under the temperature environment set by the oven. During the pressing process of the continuous fiber fabric coated with the thermoplastic resin, the oven temperature is set to heat the thermoplastic resin, thereby improving the fluidity of the thermoplastic resin, thereby improving the wettability of the thermoplastic resin to the continuous fiber fabric, and the thermoplastic resin with good fluidity is not easy to destroy the fiber directions of the continuous fiber fabric, and the regularity of the fibers in all directions is maintained while wetted, thereby improving the mechanical strength of the prepared composite board from the aspects of fiber regularity and resin wettability.

[0072] In some embodiments, the heating device 203 is adapted to provide a temperature environment of 100° C. to 200° C. to improve the fluidity of the thermoplastic resin during the lamination process.

[0073] In the apparatus for preparing the continuous fiber fabric reinforced thermoplastic composite plate according to the embodiments of the present disclosure, in some embodiments, the pressing device 202 includes at least two pressing rollers.

[0074] Continue to refer Figure 1 The laminating device 202 of the resin impregnation unit 2 includes three laminating rollers (2021, 2022, 2023), wherein one laminating roller 2022 and the other two laminating rollers (2021, 2023) are respectively arranged on both sides of the continuous fiber fabric opposite to each other, and are suitable for cooperating with each other to press the thermoplastic resin impregnated in the continuous fiber fabric and the continuous fiber fabric.

[0075] The material of the laminating roller can be selected as needed, and the laminating rollers of the laminating device 202 can be made of the same or different materials. In some embodiments, the laminating roller is made of rubber, silicone, fluororubber, metal, etc. In some embodiments, the laminating roller is made of steel.

[0076] In some embodiments, the lamination roller is made of high-strength steel; in some embodiments, hot oil or steam is passed into the interior of the lamination roller to maintain the temperature of the lamination roller, thereby heating the thermoplastic resin to enhance its fluidity.

[0077] In some embodiments, the temperature of the lamination roller is 100°C to 300°C.

[0078] In some embodiments, the roller axis lines of the cross sections of the three laminating rollers (2021, 2022, 2023) are at right angles, that is, the angle between the roller axis lines of the cross sections of the laminating rollers 2022 and 2021 and the roller axis lines of the cross sections of the laminating rollers 2022 and 2023 is at right angles, so that the continuous fiber fabric transmitted in the vertical direction is transferred to the horizontal direction after passing through the three laminating rollers (2021, 2022, 2023). The laminating device 202 simultaneously plays the role of laminating the continuous fiber fabric and changing the transmission direction of the continuous fiber fabric.

[0079] Continue to refer Figure 1 The continuous fiber fabric is initially transmitted in a horizontal direction, and the transmission direction is changed to a vertical direction after passing through a transition roller 104. The resin providing device 201 is suitable for uniformly coating the thermoplastic resin on both sides of the continuous fiber fabric transmitted in the vertical direction, and then the continuous fiber fabric is pressed by a pressing device 202 while changing its transmission direction to a horizontal direction.

[0080] The continuous fiber fabric transmitted in the horizontal direction is conducive to leveling. The continuous fiber fabric transmitted in the vertical direction is coated with thermoplastic resin. The transmission direction of the thermoplastic resin is consistent with the direction of gravity. At the same time, the transmission speed and the extrusion pressure of the thermoplastic resin are adjusted to uniformly coat the thermoplastic resin on both sides of the continuous fiber fabric at the same time. Then, the thermoplastic resin and the continuous fiber fabric are subsequently pressed together by a pressing device, so as to achieve uniform impregnation of the continuous fiber fabric with the thermoplastic resin. Conventional preparation devices coat the continuous fiber fabric transmitted in the horizontal direction with thermoplastic resin. The thermoplastic resin is greatly affected by gravity, which will cause uneven distribution of the thermoplastic resin and affect the impregnation effect. Compared with conventional preparation devices that coat the continuous fiber fabric transmitted in the horizontal direction with thermoplastic resin, the preparation device of the embodiment of the present disclosure coats the thermoplastic resin when the continuous fiber fabric is transmitted in the vertical direction, which can eliminate the influence of gravity on the distribution of the thermoplastic resin and make the thermoplastic resin uniformly coated on the surface of the continuous fiber fabric.

[0081] The preparation device of the continuous fiber fabric reinforced thermoplastic composite plate of the embodiment of the present disclosure, in some embodiments, further includes: a cooling unit 3, which is used to receive the continuous fiber fabric passed through the resin impregnation unit 2 and cool the thermoplastic resin impregnated in the continuous fiber fabric.

[0082] Continue to refer Figure 1 The cooling unit 3 includes at least one pair of cooling rollers 301, and each pair of cooling rollers 301 is suitable for cooling the thermoplastic resin from both sides of the continuous fiber fabric in cooperation with each other. The continuous fiber fabric passing through the cooling rollers is rapidly cooled, and the thermoplastic resin impregnated in the continuous fiber fabric is quickly shaped, thereby ensuring the flatness of its surface.

[0083] In some embodiments, the position of the cooling roller 301 is adjustable to change the distance between the cooling roller 301 and the laminating device 202, and the time for the thermoplastic resin to reach the cooling roller 301 after passing through the laminating device 202 is adjusted in conjunction with the traction speed of the continuous fiber fabric, so as to avoid problems such as warping caused by a long natural cooling time of the thermoplastic resin due to the distance being too long. That is, by adjusting the position of the cooling roller 301, the thermoplastic resin infiltrated in the continuous fiber fabric after passing through the laminating device 202 is squeezed by the cooling roller 301 and quickly cooled and shaped while maintaining fluidity (a certain temperature), so as to form a flat composite board surface, thereby avoiding problems such as warping.

[0084] In order to rapidly cool the thermoplastic resin impregnated in the continuous fiber fabric, in some embodiments, the temperature of the cooling roller 301 of the cooling unit 3 is -10° C. to 10° C. In some embodiments, a cooling liquid is introduced into the cooling roller 301 to ensure the temperature of the cooling roller 301 .

[0085] In some embodiments, the cooling unit 3 also includes a water cooling device 302, which is arranged behind the cooling roller 301 and is used to further cool the continuous fiber fabric impregnated with thermoplastic resin after being cooled by the cooling roller 301 to remove internal stress and avoid problems such as warping or unevenness caused by internal stress over time.

[0086] In some embodiments, the water cooling device 302 is a cooling water tank, and the temperature of the cooling water in the cooling water tank is 0°C to 10°C.

[0087] In some embodiments, the cooling unit 3 further includes an air cooling device ( Figure 1 The cooling roller 302 is not shown in the figure. The cooling roller 302 is arranged behind the cooling roller 301 and is used to further cool the continuous fiber fabric impregnated with the thermoplastic resin after being cooled by the cooling roller 301 to remove the internal stress and avoid the problems such as warping or unevenness caused by the internal stress over time.

[0088] After passing through the cooling unit 3, the continuous fiber fabric reinforced thermoplastic composite board has been prepared, and can be subsequently cut and rolled up as needed.

[0089] The device for preparing the continuous fiber fabric reinforced thermoplastic composite plate according to the embodiments of the present disclosure, in some embodiments, further comprises: a traction unit 4, which is used to provide traction force for the continuous production of the composite plate.

[0090] In some embodiments, the traction unit 4 includes a traction device 401, which includes at least two traction rollers. The two traction rollers are oppositely arranged on two sides of the continuous fiber fabric and are suitable for cooperating with each other to provide traction for the continuous fiber fabric.

[0091] In some embodiments, the traction unit 4 further includes a winding device 402 for winding the continuous fiber fabric reinforced thermoplastic composite panel.

[0092] The present invention discloses an apparatus for preparing a continuous fiber fabric reinforced thermoplastic composite plate. In some embodiments, the continuous fiber fabric is a continuous glass fiber fabric, a continuous carbon fiber fabric, a continuous aramid fiber fabric, a continuous alumina fiber fabric, a continuous polyester fiber fabric, or a continuous glass fiber polyester fiber blended fabric.

[0093] In some embodiments, the thermoplastic resin includes at least one of polypropylene resin, polyethylene resin, polyvinyl chloride resin, polyethylene terephthalate resin, nylon resin, polyoxymethylene resin, polycarbonate resin, and polyphenylene sulfide resin.

[0094] In some embodiments, the thermoplastic resin provided by the resin providing device 201 is a thermoplastic resin modified with an auxiliary agent, and the auxiliary agent includes at least one of a compatibilizer, an antioxidant, a heat-resistant agent, and a masterbatch.

[0095] Figure 2 A schematic diagram of another embodiment of a device for preparing a continuous fiber fabric reinforced thermoplastic composite panel according to an embodiment of the present disclosure is shown. Figure 2 and Figure 1 For different implementations, the difference is that Figure 2 In an embodiment, the resin impregnation unit and the cooling unit successively impregnate the two surfaces of the continuous fiber fabric transmitted in the horizontal direction with the thermoplastic resin and cool it, and the continuous fiber fabric is horizontally flipped by the flipping unit so that different surfaces of the continuous fiber fabric face upward for thermoplastic resin impregnation.

[0096] Figure 2 In the embodiment, the pretreatment device 12, the sizing agent activation device 13, the unwinding device 14, the traction device 41, the winding device 42 and Figure 1 The pretreatment device 102, the impregnating agent activation device 103, the unwinding device 105, the traction device 401, and the winding device 402 are the same or similar and will not be described in detail here.

[0097] refer to Figure 2 The pre-traction roller assembly 111 includes two pairs of pre-traction rollers for traction of the continuous fiber fabric to transfer it to the flattening roller assembly 112 for flattening.

[0098] The resin providing device includes: a first coating device 211 and a second coating device 212, which are suitable for successively coating the thermoplastic resin on corresponding positions on both sides of the continuous fiber fabric. In some embodiments, the first coating device 211 includes an extrusion die head, which is suitable for extruding the thermoplastic resin to coat the first side of the continuous fiber fabric when the continuous fiber fabric passes in a horizontal direction; in some embodiments, the second coating device 212 includes an extrusion die head, which is suitable for extruding the thermoplastic resin to coat the second side of the continuous fiber fabric when the continuous fiber fabric passes in a horizontal direction, and the second side has an opposite direction to the first side.

[0099] In some embodiments, the extrusion die of the first coating device 211 is disposed above the first lamination roller assembly 221, the extrusion die of the second coating device 212 is disposed above the second lamination roller assembly 222, and the extrusion port of the extrusion die is disposed between the two lamination rollers, so that the extruded thermoplastic resin is pressed by the lamination roller for the first time to impregnate the continuous fiber fabric.

[0100] In some embodiments, the preparation device of the continuous fiber reinforced thermoplastic composite plate also includes: a flipping unit 5, which is suitable for flipping the horizontally transmitted continuous fiber fabric so that the orientations of the two sides of the continuous fiber fabric are replaced, and continues to be transmitted in the horizontal direction so that the coating is completed when the side of the continuous fiber fabric that needs to be coated with thermoplastic resin faces upward.

[0101] In some embodiments, the turning unit 5 comprises two turning rollers (51, 52), which are suitable for turning the continuous fiber fabric horizontally after being transported in the horizontal direction and then continuing to transport it in the horizontal direction. In some embodiments, the turning roller 52 is arranged directly below the turning roller 51.

[0102] In some embodiments, the lamination device includes: a first lamination roller assembly 221 and a second lamination roller assembly 222, the first lamination roller assembly 221 and the second lamination roller assembly 222 respectively include at least two lamination rollers, the first lamination roller assembly 221 is arranged between the first coating device 211 and the flipping unit 5, and is suitable for laminating the thermoplastic resin coated on the first side of the continuous fiber fabric with the continuous fiber fabric; the second lamination roller assembly 222 is arranged after the second coating device, and is suitable for laminating the thermoplastic resin coated on the second side of the continuous fiber fabric with the continuous fiber fabric.

[0103] In some embodiments, the first lamination roller assembly 221 includes: three lamination rollers (2211, 2212, 2213) arranged in a horizontal direction; in some embodiments, the lamination roller 2211 through which the continuous fiber fabric first passes is a silicone roller, and the other two lamination rollers (2212, 2213) arranged horizontally with the silicone roller are steel rods.

[0104] In some embodiments, the second lamination roller assembly 222 includes: three lamination rollers (2221, 2222, 2223) arranged in a horizontal direction; in some embodiments, the lamination roller 2221 through which the continuous fiber fabric first passes is a silicone roller, and the other two lamination rollers (2222, 2233) arranged horizontally with the silicone roller are steel rods.

[0105] In some embodiments, the heating device includes: a first heating device 231, suitable for heating the thermoplastic resin when the first lamination roller assembly 221 is laminating; a second heating device 232, suitable for heating the thermoplastic resin when the second lamination roller assembly 222 is laminating.

[0106] In some embodiments, the first heating device 231 is an infrared oven, which is arranged below the first lamination roller assembly 221, so that when the continuous fiber fabric passes through the first lamination roller assembly 221, its first surface faces the infrared oven, which is conducive to heating the thermoplastic resin; in some embodiments, the first heating device 231 is a high-temperature oven, and at least one lamination roller of the first lamination roller assembly 221 is arranged in the high-temperature oven.

[0107] In some embodiments, the second heating device 232 is an infrared oven, which is arranged below the second lamination roller assembly 222, so that when the continuous fiber fabric passes through the second lamination roller assembly 222, its second surface faces the infrared oven, which is conducive to heating the thermoplastic resin; in some embodiments, the second heating device 232 is a high-temperature oven, and at least one lamination roller of the second lamination roller assembly 222 is arranged in the high-temperature oven.

[0108] During the process of laminating the continuous fiber fabric with the thermoplastic resin, the first heating device 231 and the second heating device 232 are used to heat the thermoplastic resin respectively to improve the fluidity of the thermoplastic resin, thereby improving the impregnation effect.

[0109] Continue to refer Figure 2 , the three laminating rollers (2211, 2212, 2213) of the first laminating roller assembly 221 are arranged horizontally. In some embodiments, the first heating device 231 heats the laminating roller 2212 located between the two laminating rollers (2212, 2213) during the laminating process. Furthermore, the first heating device 231 is located below the laminating roller 2212 and the laminating roller 2213, or the laminating roller 2212 and the laminating roller 2213 are located in the first heating device 231. The first heating device 231 heats the thermoplastic resin coated on the continuous fiber fabric passing through the laminating roller 2212 and the laminating roller 2213 to heat the thermoplastic resin during the laminating process to maintain its temperature, so that the thermoplastic resin passing through the laminating roller 2213 maintains its temperature and fluidity and is quickly cooled and shaped after entering the cooling unit, thereby forming a flat composite board surface and preventing warping.

[0110] The three laminating rollers (2221, 2222, 2223) of the second laminating roller assembly 222 are arranged horizontally. In some embodiments, the second heating device 232 heats the laminating roller 2222 located in the middle during the laminating process. Furthermore, the second heating device 232 is located below the laminating roller 2222 and the laminating roller 2223, or the laminating roller 2222 and the laminating roller 2223 are located in the second heating device 232. The second heating device 232 heats the thermoplastic resin coated on the continuous fiber fabric passing through the laminating roller 2222 and the laminating roller 2223 to heat the thermoplastic resin during the laminating process to maintain its temperature, so that the thermoplastic resin passing through the laminating roller 2223 maintains its temperature and enters the cooling unit to be rapidly cooled and shaped, thereby forming a flat composite board surface and preventing warping.

[0111] In some embodiments, the preparation device of the continuous fiber reinforced thermoplastic composite plate further includes a cooling unit, which includes: a first cooling device 31, which is arranged behind the first laminating roller assembly 221, and includes: at least one pair of cooling rollers 311, and the at least one pair of cooling rollers 311 are suitable for cooperating with each other to cool the thermoplastic resin impregnated in the continuous fiber fabric after being pressed by the first laminating roller assembly 221; a second cooling device 32, which is arranged behind the second laminating roller assembly 222, and includes: at least one pair of cooling rollers 321, and the at least one pair of cooling rollers 321 are suitable for cooperating with each other to cool the thermoplastic resin impregnated in the continuous fiber fabric after being pressed by the second laminating roller assembly 222. The continuous fiber fabric passing through the cooling roller is rapidly cooled, and the thermoplastic resin impregnated in the continuous fiber fabric is squeezed and quickly cooled and shaped when it has fluidity and a certain temperature, thereby ensuring the flatness of its surface.

[0112] In some embodiments, the temperature of the cooling roller 311 of the first cooling device 31 is -10°C to 10°C; in some embodiments, the temperature of the cooling roller 321 of the second cooling device 32 is -10°C to 10°C.

[0113] Continue to refer Figure 2 The first coating device 211, the first lamination roller assembly 221, the first heating device 231 and the first cooling device 31 are arranged before the turning unit 5, the second coating device 212, the second lamination roller assembly 222, the second heating device 232 and the second cooling device 32 are arranged after the turning unit 5, the first coating device 211 is arranged above the continuous fiber fabric transmission path, the first heating device 231 is an infrared oven below the first lamination roller assembly 221, the second coating device 212 is arranged above the continuous fiber fabric transmission path, and the second heating device 232 is an infrared oven below the second lamination roller assembly 222.

[0114] After being pulled and flattened by the transition flattening device 11, the continuous fiber fabric is horizontally transmitted to the first laminating roller assembly 221, with the first side of the continuous fiber fabric facing upward. When the continuous fiber fabric passes through the first coating device 211, the first coating device 211 coats the first side of the continuous fiber fabric with a thermoplastic resin, and then laminarizes the continuous fiber fabric through the first laminating roller assembly 221. During laminating, the continuous fiber fabric is heated by the first heating device 231, and after laminating, the continuous fiber fabric is cooled by the first cooling device 231, thereby completing the impregnation of the continuous fiber fabric with the thermoplastic resin from the first side. The continuous fiber fabric continues to be transmitted to the turning roller 51, and the transmission direction changes from the horizontal direction to the vertical direction after passing through the turning roller 51. After the continuous fiber fabric transmitted in the vertical direction passes through the turning roller 52, its transmission direction changes to the horizontal direction. After being turned over, the second side of the continuous fiber fabric faces upward, and the continuous fiber fabric continues to be transmitted horizontally, and the second side of the continuous fiber fabric is impregnated with the thermoplastic resin and cooled through the second coating device 212, the second laminating roller assembly 222, the second heating device 232, and the second cooling device 32.

[0115] In some embodiments, the cooling unit further includes an air cooling device 33 or a water cooling device (not shown in the figure). In some embodiments, the air cooling device 33 or the water cooling device is arranged after the second cooling device 32, and is used to further cool the continuous fiber fabric impregnated with the thermoplastic resin after being cooled by the second cooling device, so as to remove the internal stress and avoid the problems such as warping or unevenness caused by the internal stress over time.

[0116] The embodiments of the present disclosure further provide a method for preparing a continuous fiber fabric reinforced thermoplastic composite plate. The method uses the preparation device described in any of the above embodiments to prepare the continuous fiber fabric reinforced thermoplastic composite plate. The method comprises the following steps:

[0117] S1: providing a continuous fiber fabric by a continuous fiber fabric providing unit;

[0118] S2: coating the thermoplastic resin on both sides of the continuous fiber fabric by a resin providing device, and laminating the coated thermoplastic resin and the continuous fiber fabric by a laminating device, so that the thermoplastic resin is infiltrated into the continuous fiber fabric, and heating the thermoplastic resin by a heating device during the laminating process.

[0119] The method for preparing a continuous fiber fabric reinforced thermoplastic composite plate of the embodiments of the present disclosure, in some embodiments, during the pressing process of the continuous fiber fabric coated with a thermoplastic resin, the temperature at which the thermoplastic resin is heated is 100°C to 200°C. Different heating temperatures can be set for different thermoplastic resins to better improve the fluidity of the thermoplastic resin.

[0120] In some embodiments, the temperature of each laminating roller of the laminating device is set to 100°C to 300°C by introducing hot oil or hot steam into the laminating roller to improve the fluidity of the thermoplastic resin during the laminating process. The temperature of the laminating roller can be set according to the type or component of the thermoplastic resin.

[0121] In the method for preparing the continuous fiber fabric reinforced thermoplastic composite plate of the embodiment of the present disclosure, in some embodiments, step S1 comprises:

[0122] S11: pre-treating the continuous fiber fabric, wherein the pre-treating comprises: impregnating the continuous fiber fabric with an impregnating agent.

[0123] According to the types of continuous fiber fabrics and thermoplastic resins and the performance requirements of the composite board, a wetting agent of specific components is formulated to improve the interfacial adhesion between the continuous fiber fabric and the thermoplastic resin, thereby improving the mechanical strength of the composite board. In some embodiments, the wetting agent includes: at least one of a silane coupling agent, a film former, a cross-linking agent, a compatibilizer and an antistatic agent. In some embodiments, the wetting agent is a water-soluble wetting agent, present in the form of an aqueous solution, and the mass fraction of the wetting agent in the aqueous solution is 5% to 10%, and the wetting agent includes: 5% to 10% of a silane coupling agent, 30% to 70% of a film former, 5% to 20% of a cross-linking agent, 1% to 10% of a compatibilizer, and 2% to 5% of an antistatic agent.

[0124] In some embodiments, after the impregnation pretreatment, the continuous fiber fabric impregnated with the sizing agent is dried to evaporate the water, which is more conducive to winding or subsequent flattening and impregnation with thermoplastic resin.

[0125] In some embodiments, step S1 further includes:

[0126] S12: After pre-treating the continuous fiber fabric, heating is performed to activate the sizing agent impregnated in the continuous fiber fabric, and the heating temperature is 20°C to 450°C.

[0127] In some embodiments, step S1 further includes:

[0128] S13: The continuous fiber fabric is pulled and flattened by a pre-pulling roller assembly and a flattening roller assembly, so that the directions of the fibers of the continuous fiber fabric are regular.

[0129] In some embodiments, the rotation speed of the pre-traction roller of the pre-traction roller assembly is 1-2 mm / min, and the rotation speed of the flattening roller in the flattening roller assembly is 1-2 mm / min. In some embodiments, the rotation speed of the pre-traction roller is less than or equal to the rotation speed of the flattening roller, and the rotation speed of the pre-traction roller is 90%-100% of the rotation speed of the flattening roller.

[0130] In the method for preparing the continuous fiber fabric reinforced thermoplastic composite plate of the embodiment of the present disclosure, in some embodiments, coating the thermoplastic resin on both sides of the continuous fiber fabric comprises: coating the thermoplastic resin on both sides of the continuous fiber fabric being transported in the vertical direction by means of a first coating device and a second coating device, or coating the thermoplastic resin on both sides of the continuous fiber fabric being transported in the horizontal direction before and after the continuous fiber fabric is horizontally flipped. Coating the thermoplastic resin on both sides of the continuous fiber fabric being transported in the vertical direction can be performed by: Figure 1 The preparation device of the continuous fiber fabric reinforced thermoplastic composite plate of the embodiment is realized; the thermoplastic resin is applied to both sides of the continuous fiber fabric transmitted in the horizontal direction before and after the continuous fiber fabric is horizontally turned over, and the continuous fiber fabric can be Figure 1 The preparation device of the continuous fiber fabric reinforced thermoplastic composite plate of the embodiment is realized; it will not be repeated here.

[0131] In some embodiments, the first coating device and the second coating device are extruders, and the extrusion of the thermoplastic resin is controlled by adjusting the extrusion volume, extrusion pressure, extruder temperature, etc. of the extruder. In some embodiments, the main pump pressure of the extruder is 2MPa~8MPa, and in some embodiments, it is 4MPa~6MPa; in some embodiments, the extruder temperature is 120~320℃, and in some embodiments, it is 180~300℃ or 120~250℃; in some embodiments, the extrusion die temperature is 200~350℃, and in some embodiments, it is 230~250℃ or 280~320℃.

[0132] The method for preparing the continuous fiber fabric reinforced thermoplastic composite plate of the embodiments of the present disclosure, in some embodiments, the preparation method further includes: S3: quickly cooling and shaping the thermoplastic resin infiltrated by a cooling roller, and further cooling the thermoplastic resin by an air cooling or water cooling device to remove stress.

[0133] In some embodiments, the cooling unit includes at least one pair of cooling rollers, each pair of cooling rollers is adapted to cooperate with each other to cool the thermoplastic resin from both sides of the continuous fiber fabric. The continuous fiber fabric passing through the cooling rollers is rapidly cooled, and the thermoplastic resin infiltrated in the continuous fiber fabric is rapidly cooled and shaped when it has fluidity and a certain temperature, thereby ensuring the flatness of its surface. In some embodiments, the temperature of the cooling rollers is adjusted to -10°C to 10°C.

[0134] In some embodiments, the cooling unit further comprises: a water cooling device or / and an air cooling device, which is arranged behind the cooling roller and is used to further cool the continuous fiber fabric impregnated with the thermoplastic resin after being cooled by the cooling roller to remove internal stress. In some embodiments, the water cooling device is a cooling water tank, and the temperature of the cooling water in the cooling water tank is 0°C to 10°C.

[0135] The method for preparing the continuous fiber fabric reinforced thermoplastic composite plate of the embodiments of the present disclosure, in some embodiments, further comprises: after cooling, obtaining the continuous fiber fabric reinforced thermoplastic composite plate, which can be cut and rolled up as needed.

[0136] The present invention discloses a method for preparing a continuous fiber fabric reinforced thermoplastic composite plate. In some embodiments, the continuous fiber fabric includes: continuous glass fiber fabric, continuous carbon fiber fabric, continuous aramid fiber fabric, continuous alumina fiber fabric, continuous polyester fiber fabric, or continuous glass fiber polyester fiber blended fabric.

[0137] In the method for preparing the continuous fiber fabric reinforced thermoplastic composite plate of the embodiments of the present disclosure, in some embodiments, the thermoplastic resin includes at least one of polypropylene resin, polyethylene resin, polyvinyl chloride resin, polyethylene terephthalate resin, nylon resin, polyoxymethylene resin, polycarbonate resin, and polyphenylene sulfide resin. In some embodiments, the thermoplastic resin is a thermoplastic resin modified with an auxiliary agent, and the auxiliary agent includes at least one of a compatibilizer, an antioxidant, a heat-resistant agent, and a masterbatch.

[0138] The following is a detailed description of the preparation method and preparation device of the continuous fiber fabric reinforced thermoplastic composite plate disclosed in the present invention in conjunction with specific embodiments. Figure 1 and Figure 2 The preparation device is used to prepare continuous fiber fabric reinforced thermoplastic composite panels.

[0139] Example 1

[0140] (1) The EWR400 continuous glass fiber woven fabric transmitted in the horizontal direction is subjected to surface impregnation treatment with an impregnation agent through a pretreatment device 102, wherein the impregnation agent is a water-soluble impregnation agent with an effective component of 8 wt%, and the effective components of the impregnation agent include: 8 wt% of an acyloxysilane coupling agent, 70 wt% of a maleic anhydride-modified polypropylene emulsion, 10 wt% of an aqueous blocked isocyanate crosslinking agent, 10 wt% of a compatibilizer, and 2 wt% of an antistatic agent; the impregnated fiber fabric is dried and rolled up for standby use, and the oven drying temperature is 200-300° C.;

[0141] (2) The EWR400 continuous glass fiber woven fabric treated with the sizing agent is loaded into the unwinding device 105 for active unwinding. The unwinding speed is 1.5 m / min. The pre-traction roller speed of the pre-traction roller assembly 111 is 1.5 m / min. The flattening roller speed of the flattening roller assembly 1012 is 1.5 mm / min. The directions of the fibers of the continuous glass fiber fabric are regularized by pre-traction and flattening. After the continuous glass fiber fabric passes through the transition roller 104, the transmission direction changes from horizontal to vertical. The continuous glass fiber fabric is transmitted in a vertical direction into the infrared oven used as the sizing agent activation device 103. The temperature of the infrared oven is set to 400° C. to activate the sizing agent on the surface of the continuous glass fiber fabric.

[0142] (3) The extruder uniformly coats the modified PP (polypropylene) resin onto the two surfaces of the vertically transmitted continuous glass fiber fabric through two extrusion dies, the extrusion main pump pressure is 4 MPa, the extruder temperature is 140-250° C., and the extrusion die temperature is 230-250° C.;

[0143] (4) The PP resin coated on the continuous glass fiber fabric is hot-pressed and impregnated by three pressing rollers of the pressing device 202. The temperature of the pressing rollers is 230-240°C, and the pressure of the pressing rollers is 5MPa. The heating device 203 is an oven. The pressing device 22 is arranged in the oven. The temperature of the oven is set to 160°C for baking the PP resin to ensure its fluidity, thereby ensuring the impregnation effect of the PP resin. The connecting line of the roller axes of the cross sections of the three pressing rollers is at right angles. The continuous glass fiber fabric transmitted in the vertical direction is transferred to the horizontal direction after passing through the three pressing rollers.

[0144] (5) The continuous glass fiber fabric impregnated with PP resin is transferred to the cooling unit 3, and is rapidly cooled and shaped through a pair of cooling rollers 301 at a temperature of -5°C to ensure surface flatness; and then transferred to the water cooling device 302 for cooling to remove internal stress, and the cooling water temperature is 5-10°C;

[0145] (6) The continuous fiber fabric reinforced thermoplastic composite plate formed after cooling is towed by a towing device 401, trimmed and cut, and rolled up to obtain a continuous glass fiber reinforced PP composite plate.

[0146] Example 2

[0147] (1) 600g / m2 transmitted in the horizontal direction 2The continuous nylon fiber and glass fiber mixed braid is subjected to surface impregnation treatment with an impregnating agent through a pretreatment device 12, wherein the impregnating agent is a water-soluble impregnating agent with an effective component of 5wt%, and the effective components of the impregnating agent include: 5wt% of an aminosilane coupling agent, 70wt% of a polyester polyurethane emulsion, 15wt% of an aqueous blocked isocyanate crosslinking agent, 5wt% of a compatibilizer, 3wt% of a dispersant, and 2wt% of an antistatic agent; the impregnated fiber fabric is dried and rolled up for standby use, and the oven drying temperature is 300-350°C;

[0148] (2) The continuous nylon fiber and glass fiber mixed fabric treated with the sizing agent is loaded into the unwinding device 14 for active unwinding. The unwinding speed is 2 m / min. The speed of the two pairs of pre-drawing rollers of the pre-drawing roller assembly 111 is 2 m / min. The speed of the flattening roller of the flattening roller assembly 112 is 2 mm / min. The continuous fiber fabric is pulled by the first pair of pre-drawing rollers 111 to be transported into the infrared oven used as the sizing agent activation device 13. The temperature of the infrared oven is set to 400° C. to activate the sizing agent on the surface of the continuous fiber fabric. After passing through the oven, the continuous fiber fabric is pulled by the second pair of pre-drawing rollers 111 and flattened by the flattening rollers, and the directions of the fibers are regular.

[0149] (3) The extruder uniformly coats the modified nylon resin onto the first side of the horizontally transmitted continuous fiber fabric through the extrusion die, the first side faces upward and is located below the extrusion die, the extrusion main pump pressure is 6 MPa, the extruder temperature is 180-300° C., and the extrusion die temperature is 280-320° C.;

[0150] (4) The nylon resin coated on the continuous fiber fabric is hot-pressed and impregnated by three horizontally distributed pressing rollers of the pressing device 22. The temperature of the pressing rollers is 180-300° C., and the pressure of the pressing rollers is 5 MPa. The first heating device 231 is an infrared oven, which is arranged below the two pressing rollers (2212, 2213) of the pressing device 22. The temperature of the infrared oven is set to 280° C., which is used to bake the nylon resin to ensure its fluidity, thereby ensuring the impregnation effect of the nylon resin;

[0151] (5) The continuous fiber fabric impregnated with nylon resin on one side passes through a pair of cooling rollers 311 for rapid cooling and shaping. The temperature of the cooling rollers is -5°C. The cooled continuous fiber fabric is continuously transferred to the turning unit 5 in a horizontal direction. It is turned horizontally through two turning rollers (51, 52) and continuously transferred in a horizontal direction. The second side of the continuous fiber fabric is turned from facing downward to facing upward, so as to facilitate resin impregnation from the second side of the continuous fiber fabric.

[0152] (6) The extruder uniformly coats the modified nylon resin onto the second side of the horizontally transmitted continuous fiber fabric through an extrusion die head, the extrusion main body pump pressure is 6 MPa, the extruder temperature is 180-300° C., and the extrusion die head temperature is 280-320° C.;

[0153] (7) The nylon resin coated on the continuous fiber fabric is hot-pressed and impregnated by three horizontally distributed pressing rollers of the pressing device 22. The temperature of the pressing rollers is 180-300° C., and the pressure of the pressing rollers is 5 MPa. The second heating device 232 is an infrared oven, which is arranged below two of the pressing rollers (2222, 2223) of the pressing device 22. The temperature of the infrared oven is set to 280° C., which is used to bake the nylon resin to ensure its fluidity, thereby ensuring the impregnation effect of the nylon resin;

[0154] (8) The continuous fiber fabric impregnated with nylon resin on both sides passes through a pair of cooling rollers 321 at a temperature of -5°C for rapid cooling and shaping, and then passes through an air cooling device 33 for cooling to remove internal stress;

[0155] (9) The mixed fiber fabric reinforced nylon resin composite plate is pulled by a pulling device 41 at a pulling speed of 2 m / min, trimmed and cut, and rolled to obtain a continuous nylon fiber and glass fiber mixed fabric reinforced nylon composite plate.

[0156] The continuous glass fiber reinforced PP composite board in Example 1 was tested for mechanical properties. At the same time, the mechanical properties of the composite board (Comparative Example 1) obtained under the preparation conditions of Example 1 without pretreatment of the EWR400 continuous glass fiber woven cloth with a sizing agent were tested, and the mechanical properties of the composite board (Comparative Example 2) obtained under the preparation conditions of Example 1 without using a heating device for heating when the pressing device was pressed were tested. The test results are recorded in the following Table 1.

[0157] Table 1 Performance test results of continuous glass fiber reinforced PP composite board

[0158]

[0159] It can be seen from the test results in Table 1 that the continuous glass fiber reinforced PP composite plate prepared in Example 1 has better mechanical properties, while the mechanical properties of the continuous glass fiber reinforced PP composite plates of Comparative Examples 1 and 2 are relatively poor due to the poor effect of PP resin impregnating the continuous glass fiber fabric.

[0160] Mechanical properties tests were performed on the continuous glass fiber reinforced PP composite board prepared in Example 1, the continuous glass fiber reinforced PP composite board prepared by conventional press compounding, and the continuous glass fiber reinforced PP composite board prepared by a continuous Teflon belt conveyor, and the test results are recorded in Table 2 below.

[0161] Table 2 Performance test results of continuous glass fiber reinforced PP composite panels prepared by different preparation devices

[0162]

[0163] It can be seen from Table 2 that compared with the continuous glass fiber reinforced PP composite board prepared by the continuous Teflon belt conveyor, the continuous glass fiber reinforced PP composite board prepared by the preparation device of the embodiment of the present disclosure has better mechanical properties, better production efficiency, smooth appearance and no warping; compared with the continuous glass fiber reinforced PP composite board prepared by the press, the continuous glass fiber reinforced PP composite board prepared by the preparation device of the embodiment of the present disclosure has comparable mechanical properties, and continuous production has higher production efficiency, smooth appearance and no warping.

[0164] The embodiments of the present disclosure also provide a continuous fiber fabric reinforced thermoplastic composite plate, which can be prepared by the method for preparing a continuous fiber fabric reinforced thermoplastic composite plate of any of the above embodiments, or by the device for preparing a continuous fiber fabric reinforced thermoplastic composite plate of any of the above embodiments.

[0165] The continuous fiber fabric reinforced thermoplastic composite plate of the embodiment of the present disclosure has good mechanical properties, a smooth appearance without warping problems, a smoothness reaching the Class A surface standard, and can be continuously produced and prepared with high production efficiency.

[0166] The above is only an exemplary embodiment used to illustrate the principle of the present disclosure, and is not intended to limit the scope of protection of the present disclosure. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present disclosure, and these modifications and improvements are also within the scope of protection of the present disclosure.

Claims

1. A preparation device for continuous fiber fabric reinforced thermoplastic composite panels, characterized in that: include: A continuous fiber fabric providing unit, used for providing a continuous fiber fabric; A resin impregnation unit is adapted to receive the continuous fiber fabric provided by the continuous fiber fabric providing unit and impregnate the continuous fiber fabric with a thermoplastic resin, wherein the resin impregnation unit comprises: A resin providing device, adapted to apply the thermoplastic resin to one or both sides of the continuous fiber fabric; A pressing device, adapted to press the thermoplastic resin and the continuous fiber fabric; The heating device is suitable for heating the thermoplastic resin during the lamination process.

2. The preparation device according to claim 1, characterized in that: The continuous fiber fabric providing unit comprises: a transition flattening device, which is used to transfer and flatten the continuous fiber fabric so that the directions of the fibers of the continuous fiber fabric entering the resin impregnation unit are regular, and the transition flattening device comprises: A pre-drawing roller assembly, comprising at least two pre-drawing rollers, wherein the pre-drawing rollers are adapted to cooperate with each other to draw the continuous fiber fabric from both sides of the continuous fiber fabric; The flattening roller assembly comprises at least one flattening roller for flattening the continuous fiber fabric.

3. The preparation device according to claim 2, characterized in that: The continuous fiber fabric providing unit further comprises: a pre-treatment device adapted to perform an impregnation treatment on the continuous fiber fabric by using an impregnating agent before the continuous fiber fabric is transmitted into the transition flattening device.

4. The preparation device according to claim 3, characterized in that: The continuous fiber fabric providing unit further comprises: a wetting agent activating device, which is adapted to provide heat to the continuous fiber fabric treated by the pre-treatment device, so as to activate the wetting agent impregnated in the continuous fiber fabric.

5. The preparation device according to claim 4, characterized in that: The infiltrant activation device comprises: an infrared oven.

6. The preparation device according to claim 1, characterized in that: The lamination device comprises at least two lamination rollers.

7. The preparation device according to claim 6, characterized in that: The lamination roller is made of metal, and hot oil or steam is suitable for passing into the interior of the lamination roller to maintain the temperature of the lamination roller.

8. The preparation device according to claim 1, characterized in that: The heating device is an oven, and the pressing device is located in the oven.

9. The preparation device according to claim 1, characterized in that: The heating device is an infrared oven.

10. The preparation device according to claim 1, characterized in that: Also includes: The cooling unit is used for receiving the continuous fiber fabric passing through the resin impregnation unit and cooling the thermoplastic resin impregnated in the continuous fiber fabric.

11. The preparation device according to claim 10, characterized in that: The cooling unit comprises: at least one pair of cooling rollers, and the at least one pair of cooling rollers are adapted to cooperate with each other to squeeze and cool the thermoplastic resin from both sides of the continuous fiber fabric.

12. The preparation device according to claim 11, characterized in that: The position of the cooling roller is adjustable.

13. The preparation device according to claim 11, characterized in that: The cooling unit further comprises: an air cooling device or a water cooling device, which is suitable for further cooling the continuous fiber fabric impregnated with the thermoplastic resin cooled by the cooling roller.

14. The preparation device according to claim 1, characterized in that: The resin providing device comprises: a first coating device and a second coating device, which are suitable for coating the thermoplastic resin on both sides of the continuous fiber fabric.

15. The preparation device according to claim 14, characterized in that: The first coating device and the second coating device respectively include: a double-layer co-extrusion die head, which is suitable for coating two layers of thermoplastic resin on both sides of the continuous fiber fabric respectively.

16. The preparation device according to claim 14, characterized in that: The continuous fiber fabric providing unit further includes: at least one transition roller, wherein one transition roller is used to change the transmission direction of the continuous fiber fabric from a horizontal direction to a vertical direction; The first coating device and the second coating device are disposed oppositely on two sides of the continuous fiber fabric, and are suitable for coating the thermoplastic resin on both sides of the continuous fiber fabric when the continuous fiber fabric passes in a vertical direction.

17. The preparation device according to claim 16, characterized in that: The laminating device comprises three laminating rollers, and the connecting line of the roller axes of the cross sections of the three laminating rollers is at a right angle, so that the continuous fiber fabric transmitted in the vertical direction is converted into horizontal direction transmission after passing through the three laminating rollers.

18. The preparation device according to claim 14, characterized in that: Also includes: A turning unit, adapted to turn over the horizontally transported continuous fiber fabric, so that the orientations of the two sides of the continuous fiber fabric are replaced, and the continuous fiber fabric continues to be transported in the horizontal direction; The first coating device is arranged before the flipping unit, and is suitable for coating one side of the continuous fiber fabric before flipping with a thermoplastic resin; the second coating device is arranged after the flipping unit, and is suitable for coating the other side of the continuous fiber fabric after flipping with a thermoplastic resin; The laminating device comprises: a first laminating roller assembly and a second laminating roller assembly, wherein the first laminating roller assembly and the second laminating roller assembly respectively comprise at least two laminating rollers, wherein the first laminating roller assembly is arranged between the first coating device and the flip unit, and is suitable for laminating the thermoplastic resin coated on one side of the continuous fiber fabric with the continuous fiber fabric; and the second laminating roller assembly is arranged after the second coating device, and is suitable for laminating the thermoplastic resin coated on the other side of the continuous fiber fabric with the continuous fiber fabric; The heating device comprises: a first heating device, adapted to heat the thermoplastic resin when the first lamination roller assembly is laminating; and a second heating device, adapted to heat the thermoplastic resin when the second lamination roller assembly is laminating.

19. The preparation device according to claim 18, characterized in that: The turning unit comprises two turning rollers, which are suitable for turning the continuous fiber fabric horizontally transported through the first coating device horizontally and then continuing to transport it horizontally to the second coating device.

20. The preparation device according to claim 18, characterized in that: The first lamination roller assembly includes: three lamination rollers arranged in a horizontal direction; the second lamination roller assembly includes: three lamination rollers arranged in a horizontal direction.

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