Trapezoidal continuous fiber impregnation reinforcement device

Abstract

The utility model discloses a trapezoidal continuous fiber impregnation reinforcing device, it is trapezoidal structure setting, including import mechanism, melt impregnation module, export regulation mechanism, import mechanism sets up at wide distance side, and export regulation mechanism sets up at narrow distance side, melt impregnation module includes infiltration top groove, infiltration bottom groove and dispersion infiltration device, top groove heating structure is arranged in the infiltration top groove, and bottom groove heating structure and cleaning structure are arranged in the infiltration bottom groove, and dispersion infiltration device is located between infiltration top groove and the infiltration bottom groove, dispersion infiltration device is trapezoidal structure setting, and it includes positioning roller, impregnation roller, immobile roller, positioning roller runs through impregnation roller and immobile roller and fixes position and interval through adjustable device, and impregnation roller includes roller body, and the middle part of roller body is support roller, and the periphery of support roller is dynamic roller, and the circumferential periphery of dynamic roller is evenly arranged with the flow guide groove of concave-convex structure of guide, and immobile roller is smooth surface round roller and is fixed structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to long fiber reinforced thermoplastic material melt impregnation forming technical field, especially a kind of trapezoidal continuous fiber impregnation reinforcing device for long fiber reinforced thermoplastic material. BACKGROUND

[0002] Thermoplastic composites have excellent properties such as high stiffness, high strength, low density, fatigue resistance, corrosion resistance, recyclability, etc. In some high-performance terminal applications, they are more popular than conventional materials (such as aluminum, steel, etc.) and are the fastest growing. Compared with thermosetting materials, thermoplastic materials do not need to be crosslinked and cured, can be processed multiple times, and the forming process is more convenient and efficient, so thermoplastic materials have maintained stable and sustainable development in recent years, especially fiber-reinforced thermoplastic materials.

[0003] In current melt impregnation process technology, the most commonly used continuous fiber melt impregnation forming process has simple equipment, high production efficiency and can be produced continuously. Prepreg is prepared by impregnating fibers or fabrics in molten resin. In order to achieve uniform impregnation, a melt with too high viscosity cannot be selected. If the viscosity of the material is too high, impregnation will become difficult, especially for long fiber reinforced thermoplastic materials. Short impregnation process time and high viscosity can cause the resin to be difficult to fully penetrate into the fiber bundle, resulting in "dry spots" and excessive porosity (greater than 10%) in the fiber bundle, thereby affecting product quality. At the same time, most resins need to be processed at a high temperature of 300℃ or above (such as PEEK with a melting point of 343℃), and the resin is prone to degradation at high temperature, further increasing the viscosity and causing impregnation difficulties.

[0004] On the other hand, high-viscosity melt can generate strong shear force when flowing in the mold, causing the fibers to orient, deflect or break (especially for fibers with an aspect ratio >1000). The front of the melt flows faster than the inside, pushing the fibers to the edge and forming a "fountain flow", which causes the edge fibers to be rich and the center to be sparse, affecting the uniformity of fiber distribution and product quality.

[0005] Therefore, how to form good impregnation between long fibers and different viscosity resin materials, so that they are fully contacted and mixed, and the damage to long fiber materials during the preparation and molding of composite materials is reduced, is a key problem faced by the material preparation and molding process. At the same time, in the composite material, how to ensure that the continuous long fibers are more evenly distributed and the fiber breakage rate is as low as possible during the impregnation process, and reduce the problem of fiber breakage and aggregation during operation, is also a technical problem that needs to be solved urgently. Utility model content

[0006] The utility model discloses a trapezoidal continuous fiber impregnation reinforcing device for long fiber reinforced thermoplastic material to solve the problem of long fiber material in different viscosity resin's mold structure impregnation difficulty and uneven fiber distribution in the prior art. Through the improvement of the resin inlet mechanism flow channel, the different viscosity resin materials are more evenly distributed in the conveying section direction, which is combined with the uniformly distributed fiber yarn more fully, and further utilizes the trapezoidal mold structure to realize dynamic shearing when the high viscosity resin material flows, thereby reducing the viscosity and breaking through the high viscosity resin impregnation limit, simultaneously utilizes the dispersed impregnation device to realize the depth impregnation of resin and fiber mixture in the traction direction with multi-stage pressure gradient, utilizes the combination structure of the stationary roller and dynamic roller in the dispersed impregnation device to realize the mechanical dynamic yarn spreading of long fiber in the longitudinal and transverse impregnation directions, thereby realizing the full impregnation of high viscosity resin and continuous fiber and the uniformity of fiber yarn distribution in the mixture.

[0007] In order to solve the above technical problems, the utility model provides a trapezoidal continuous fiber impregnation reinforcing device for long fiber reinforced thermoplastic material, and the specific structure is as follows: It is provided with trapezoidal structure, and it includes import mechanism, melt impregnation module and outlet adjusting mechanism. The melt impregnation module includes infiltration top groove, infiltration bottom groove and dispersed infiltration device. The infiltration top groove is provided with top groove heating structure. The infiltration bottom groove is provided with bottom groove heating structure and cleaning structure. The dispersed infiltration device is located between the infiltration top groove and the infiltration bottom groove and is an independent structure. The dispersed infiltration device is provided with trapezoidal structure and includes positioning roller, impregnation roller and stationary roller. The positioning roller is cylindrical structure and has two roots. The impregnation roller includes roller body. The stationary roller is smooth round roller and fixed structure.

[0008] The import mechanism includes import module, side guard plate and anti-overflow block. The import module is located at the wide side of the infiltration bottom model and is fixed by bolt. The side guard plate is located on both sides of the import module and has the function of blocking fluid to prevent overflow. The anti-overflow block is located on the top of the import module and has the function of preventing backflow and guiding fiber yarn.

[0009] The import module comprises a storage transition bin, a fluid separation plate, corrugated guide columns, an import port and an export port; the storage transition bin is a fan-shaped cavity structure, and the middle position of the storage transition bin is the fluid separation plate, which has a flow guiding and dispersing effect; a plurality of corrugated guide columns are arranged on the inner wall of the storage transition bin, and the overall structure is in a convex-concave structure; the import port is located at the bottom of the import module and is connected with a die of an external resin extrusion device; and the export port is located at the top of the import module and is connected with the infiltration bottom groove to form an export structure.

[0010] The overall structure of the infiltration top groove is a trapezoid, and the impregnation structure on the side of the infiltration top groove facing the infiltration bottom groove is fish scale-shaped and arranged in a staggered manner.

[0011] The overall structure of the infiltration bottom groove is a trapezoid, and the side of the infiltration bottom groove facing the infiltration top groove is provided with an infiltration cavity, and the top surface structure of the infiltration cavity is a corrugated fold line structure; the bottom of the infiltration bottom groove is uniformly provided with through holes, and the through holes are connected with an external cleaning structure to realize plugging and fixing. The outlet adjusting mechanism comprises an adjusting die and a lifting driving mechanism assembly, the adjusting die is located at the narrow side of the infiltration bottom die, and the upper part of the adjusting die is connected with the narrow end side of the infiltration top groove; the lifting driving mechanism assembly provides lifting power in the height direction of the adjusting die.

[0012] The lifting driving mechanism assembly comprises a driving structure and a synchronous lifting mechanism, and the synchronous lifting mechanism is fixed with the adjusting die by means of bolts or welding.

[0013] Compared with the prior art, the trapezoidal continuous fiber impregnation reinforcing device has the following advantages: a special structure of resin import flow channel is adopted, so that different viscosity resin materials are more uniformly distributed in the conveying section direction, and are more fully combined with uniformly distributed fiber yarns, further, dynamic shearing of the resin materials is realized through the trapezoidal melting impregnation module to reduce the viscosity and break through the limitation of high viscosity resin impregnation, at the same time, multi-stage pressure gradient changes of the resin and fiber yarn mixture in the traction direction are realized to achieve deep impregnation, and the combination structure of the stationary roller and the dynamic roller in the intermediate dispersion infiltration device is used to realize mechanical dynamic spreading of the continuous fiber in the longitudinal and transverse impregnation directions, so that continuous fiber thermoplastic composite sheet and coil materials with different thicknesses and widths can be uniformly and continuously produced. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The overall structure of the trapezoidal continuous fiber impregnation reinforcing device is shown in the figure.

[0015] Figure 2 : The whole structure section view of the trapezoidal continuous fiber impregnation reinforcing device Figure 3 : The impregnation top groove view of the trapezoidal continuous fiber impregnation reinforcing device Figure 4 : The impregnation top groove section view of the trapezoidal continuous fiber impregnation reinforcing device Figure 5 : The impregnation bottom groove view of the trapezoidal continuous fiber impregnation reinforcing device Figure 6 : The impregnation top groove section view of the trapezoidal continuous fiber impregnation reinforcing device Figure 7 : The inlet module section view Figure 8 : The whole structure view of the dispersion impregnation device Figure 9 : The impregnation roller section view Figure 10 : The dynamic roller surface structure view In the figure, 1, the inlet mechanism, 11, the inlet module, 12, the side guard plate, 13, the anti-overflow block, 110, the storage transition bin, 111, the fluid separation plate, 112, the corrugated guide column, 113, the resin feeding port, 114, the resin discharging port, 115, the yarn feeding port, 116, the continuous fiber mixture outlet; 2, the melt impregnation module, 21, the impregnation top groove, 22, the impregnation bottom groove, 23, the dispersion impregnation device, 24, the cleaning structure, 210, the impregnation top groove body, 211, the top heating structure, 212, the top impregnation reinforcing structure, 220, the impregnation cavity, 221, the notch, 222, the bottom heating structure, 223, the bottom impregnation reinforcing structure, 230, the positioning roller, 231, the impregnation roller, 232, the stationary roller, 2311, the roller body, 2312, the dynamic roller, 2313, the supporting roller, 2314, the uniform distribution flow guide channel, 3, the outlet adjusting mechanism, 31, the adjusting mold, 32, the lifting driving mechanism assembly, 321, the driving structure, 322, the synchronous lifting mechanism. DETAILED DESCRIPTION

[0016] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," "contact," "fixing," and "docking" should be interpreted broadly. For example, they can refer to pipe connection, fitting connection, or equipment connection; they can refer to split connection or integral connection; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to connection within two components or connection outside two components; they can refer to direct contact or indirect contact; they can refer to contact between moving parts or contact between fixed parts; they can refer to fixing between two components or fixing between equipment; they can refer to docking between two components or docking between equipment. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0018] Example 1: As Figures 1-10 As shown in the figure, the trapezoidal continuous fiber impregnation and reinforcement device is schematically illustrated. Its overall structure is a flat trapezoidal structure, including an inlet mechanism 1, a melt impregnation module 2, and an outlet adjustment mechanism 3. The inlet mechanism 1 is located on the wide-spacing side; the outlet adjustment mechanism 3 is located on the narrow-spacing side. Import mechanism 1 includes import module 11, side protective plate 12, and spill prevention block 13. (Example) Figure 7 As shown, the inlet module 11 includes a material storage transition chamber 110, a fluid separator 111, a corrugated guide post 112, a resin inlet 113, a resin inlet 114, and a yarn inlet 115. The entire inlet module 11 is located on the wide side of the impregnation tank 22 and is fixed by bolts. The side protection plate 12 is located on both sides of the inlet module 11 and has the function of sealing the fluid to prevent overflow. The anti-overflow block 13 is located on the top of the inlet module 11 and its function is to prevent the imported resin material from flowing back and to guide the fiber yarn.

[0019] The melt impregnation module 2 includes an impregnation top tank 21, an impregnation bottom tank 22, a dispersion impregnation device 23, and a cleaning structure 24.

[0020] The impregnation top tank 21 has a trapezoidal structure, and a top heating structure 211 is installed through the interior of the impregnation top tank 21. A top impregnation reinforcement structure 212 is installed on the bottom surface of the impregnation top tank 21. The top heating structure 211 is usually an electric heating tube.

[0021] The impregnation tank 22 includes an impregnation tank body 221, a lower heating structure 222, a cleaning structure 24, and a bottom impregnation reinforcement structure 223. The dispersion impregnation device 23 is located between the impregnation top tank 21 and the impregnation bottom tank 22. It is an independent structure and can be replaced individually according to process requirements. The dispersion impregnation device 23 includes a positioning roller 230, an impregnation roller 231, and a stationary roller 232.

[0022] The outlet adjusting mechanism 3 comprises an adjusting mold 31 and a lifting driving mechanism assembly 32. The adjusting mold 31 is located at the narrow side of the infiltration bottom groove 22 and connected with the narrow end side of the infiltration top groove 21. The lifting driving mechanism assembly 32 provides lifting power in the height direction of the adjusting mold and comprises a driving mechanism 321 and a synchronous lifting mechanism 322.

[0023] The design of the technical solution focuses on the step-by-step and alternating winding impregnation of the fiber and resin mixture in the molten impregnation module 2 through the dispersion impregnation device 23. The dispersion impregnation device 23 has a ladder-shaped structure, including positioning rollers 230 on both sides, a plurality of impregnation rollers 231 in the middle, and a plurality of stationary rollers 232. The impregnation roller 231 includes a roller body 2311, a dynamic roller 2312, a support roller 2313, and a uniform distribution flow guide groove 2314. The positioning roller 230 is a cylindrical structure with two roots, which penetrates the impregnation roller 231 and the stationary roller 232 and fixes the position and distance through an adjustable device. The plurality of impregnation rollers 231 and the plurality of stationary rollers 232 have a gradually shortened structure and form a ladder-shaped structure after being combined.

[0024] The middle part of the roller body 2311 of the impregnation roller 231 is the support roller 2313, and the periphery of the dynamic roller 2312 is the support roller 2313. The dynamic roller 2312 has a concave-convex structure of the flow guide groove 2314 uniformly distributed on the periphery. The stationary roller 232 is a smooth round roller and has a fixed structure, and its diameter is smaller than that of the impregnation roller 231. Further, during the operation of the device, the impregnation direction of the fiber and resin mixture in the molten impregnation module 2 includes the front end of the conveying impregnation area and the rear end of the compact loose area. The middle area of the front end of the conveying impregnation area is the impregnation roller 231, and the middle area of the rear end of the compact loose area is the impregnation roller 231 and the stationary roller 232. The fiber and resin mixture in the front end of the conveying impregnation area uses the impregnation roller 231, and the rear end of the compact loose area uses the impregnation roller 231 and the stationary roller 232 to alternately act together for partitioned winding impregnation, thereby improving the impregnation efficiency. During work, the resin and fiber bundle in the molten impregnation mixing of continuous fiber reinforced thermoplastic materials achieve multi-stage pressure gradient change in the traction direction to realize deep impregnation and mechanical dynamic spreading of fiber yarns in the production process, further improving the mechanical strength, high temperature performance and impact resistance of the continuous fiber reinforced composite material product.

[0025] As Figure 7As shown, in the embodiments of the present application, the resin material is connected with the resin feeding port 113 in the inlet module 11 through the screw extrusion device outlet, enters the storage transition bin, the inside of which is fan-shaped, and the resin material is gradually excluded through the wave structure fluid movement of the corrugated guide column 113. The fluid separation plate 111 is arranged at the position 1 / 4-1 / 3 from the top, and the length is 1 / 3-1 / 2 of the transverse length of the resin feeding port 113, which uniformly distributes the fluid flow of the resin material in the cross-sectional direction. The fiber yarn is combined with the resin material in the resin feeding port 113 through the yarn inlet 115.

[0026] As shown in Figure 9 and as shown in Figure 10 The impregnation roller 231 is a roller shaft ring structure, the dynamic roller 232 and the supporting roller 233 are located at the middle position of the roller body 231, the dynamic roller 232 is a cylindrical structure and is sleeved on the supporting roller 233 and rotates under the action of the traction force of the glass fiber mixture, reduces the friction resistance in the impregnation traction process, improves the impregnation efficiency of the fiber yarn and the resin mixture, and effectively reduces the amount of broken fibers in the traction process. The uniformly distributed flow guide groove 234 on the periphery of the dynamic roller 232 is a smooth and gentle dense small wave structure, which plays a yarn guiding and dispersing role on the fiber during the forward rotation of the dynamic roller 232, reduces the uneven dispersion of the fiber in the impregnation process, and is also beneficial to the more uniform dispersion of the fiber in the trapezoidal structure gradual impregnation process of the fiber and the resin mixture.

[0027] As shown in Figure 4 and as shown in Figure 6 The top impregnation enhancement structure 212 and the bottom impregnation enhancement structure 223 are also shown in the figure. The inside of the top impregnation enhancement structure 212 is arranged in a fish scale shape, and the bottom impregnation enhancement structure 223 is provided with an impregnation bottom groove 22. The overall structure of the impregnation bottom groove 22 is trapezoidal, and the side facing the impregnation top groove 21 is provided with an impregnation cavity 220. The top surface structure of the impregnation cavity 220 is a corrugated fold line structure. The bottom of the impregnation bottom groove 22 is uniformly provided with through holes, which are connected with the external cleaning structure 24 to realize plugging and fixing.

[0028] The inside of the bottom impregnation enhancement structure 223 is a plurality of small corrugated fold line structures, which jointly increase the sufficient impregnation of the fiber and resin mixture in the molten impregnation module 2. Further, a plurality of through holes are arranged at the bottom of the bottom impregnation enhancement structure 223, which are connected with the external cleaning structure 24 and fixed by bolts, which are used for sampling detection and cleaning of the accumulated broken fibers at the bottom during production.

[0029] In a preferred embodiment of the present application, the long fiber impregnation mixing device further comprises a top infiltration enhancement structure 212 and a bottom infiltration enhancement structure 223 temperature control system (not shown in the figure), which is divided into an upper heating structure 211 and a lower heating structure 222 control part, and the upper heating structure 211 and the lower heating structure 222 are flexibly controlled in temperature by using independent temperature sensors (not shown in the figure). When the measured temperature of any position is lower than the preset temperature, the upper heating structure 211 and the lower heating structure 222 are heated to the preset temperature, so that the temperature of each position of the top infiltration enhancement structure 212 and the bottom infiltration enhancement structure 223 reaches the temperature requirement of the molten material impregnation.

[0030] It should be noted that the so-called "preset temperature" can be flexibly adjusted according to actual needs, and here the "preset temperature" is not specifically limited.

[0031] In a preferred embodiment of the present application, the trapezoidal continuous fiber impregnation enhancement device further comprises a fixed support structure (not shown in the figure), which is arranged at the bottom of the molten impregnation module 2 and connected by bolt connection or welding, and can be adjusted in height. The setting of the fixed support structure can play the role of leveling installation and height adjustment of the trapezoidal continuous fiber impregnation enhancement device.

[0032] The above is only a preferred embodiment of the present application, and does not limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A trapezoidal continuous fiber impregnation reinforcement device, characterized by: It has a trapezoidal structure and includes an inlet mechanism, a melt impregnation module, and an outlet adjustment mechanism; the inlet mechanism is located on the wide-space side; the outlet adjustment mechanism is located on the narrow-space side. The melt impregnation module includes an impregnation top tank, an impregnation bottom tank, and a dispersion impregnation device. The top tank is equipped with a top tank heating structure. The bottom tank is equipped with a bottom tank heating structure and a cleaning structure. The dispersion impregnation device is located between the top tank and the bottom tank. The dispersion impregnation device has a trapezoidal structure and includes a positioning roller, an impregnation roller, and a stationary roller. The positioning roller passes through the impregnation roller and the stationary roller and is fixed in position and spacing via an adjustable device. The impregnation roller includes a roller body, a support roller in the middle, and a dynamic roller around the support roller. The dynamic roller has evenly distributed concave-convex guiding grooves around its circumference. The stationary roller is a smooth circular roller with a fixed structure.

2. The trapezoidal continuous fiber impregnation reinforcement device according to claim 1, characterized in that: The import mechanism includes an import module, side protective plates, and anti-overflow blocks; the import module is located on the wide side of the immersion bottom mold; the side protective plates are located on both sides of the import module; and the anti-overflow blocks are located on the top of the import module.

3. A trapezoidal continuous fiber impregnation reinforcement device according to claim 2, characterized in that: The inlet module includes a storage transition chamber, a fluid separator, corrugated guide pillars, an inlet, and an outlet. The storage transition chamber has a fan-shaped cavity structure, with a fluid separator in the middle for guiding and dispersing flow. Several corrugated guide pillars are provided on the inner wall of the storage transition chamber, and the overall structure is convex and concave. The inlet is located at the bottom of the inlet module, and the outlet is located at the top of the inlet module, communicating with the immersion tank to form an outlet structure.

4. The trapezoidal continuous fiber impregnated reinforcement device of claim 1, wherein: The overall structure of the top impregnation tank is trapezoidal, and the impregnation structure on the side facing the bottom impregnation tank is fish-scale shaped and staggered.

5. The trapezoidal continuous fiber impregnated reinforcement device of claim 1, wherein: The overall structure of the soaking bottom tank is trapezoidal, and the side facing the soaking top tank is set as a soaking cavity. The top surface of the soaking cavity has a corrugated zigzag structure. The bottom of the soaking bottom tank has evenly distributed through channels, which are connected to the external cleaning structure to achieve sealing and fixation.

6. The trapezoidal continuous fiber impregnated reinforcement device of claim 1, wherein: The outlet adjustment mechanism includes an adjustment mold and a lifting drive mechanism assembly. The adjustment mold is located on the narrow side of the immersion bottom mold, and the upper part of the adjustment mold is connected to the narrow end side of the immersion top groove. The lifting drive mechanism assembly provides lifting power in the height direction of the adjustment mold.

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