Composite strip production die, composite strip production method and composite strip

Abstract

The present invention discloses a composite tape production mold, a composite tape production method and a composite tape. The composite tape production mold includes: an upper mold, a lower mold and a pressure device; the upper mold is arranged above the lower mold and is hinged with the lower mold, an impregnation tank is arranged between the upper mold and the lower mold, and a composite tape outlet is arranged at the rear side of the impregnation tank; the pressure device is connected to the upper mold and arranged above the composite tape outlet, and the pressure device includes a pressure shaft, and the upper and lower heights of the pressure shaft are adjustable, and different pressures can be applied to the composite tape. The present invention can control the fiber distribution position in the prepreg tape by arranging the pressure shaft in the production mold, realize the production of adjustable flatness of the prepreg tape, realize the adjustment of the resin content of the upper and lower surfaces of the prepreg tape, and realize the effective shaping of the apparent texture of the prepreg tape.

Description

Technical Field

[0001] The present invention generally relates to the technical field of composite strips, and more particularly to a composite strip production mold, a composite strip production method and a composite strip. Background Art

[0002] Continuous fiber reinforced thermoplastic composite tapes have high strength and high stiffness, which can meet the requirements of a variety of application scenarios, and they are lightweight (compared to traditional metal materials), making them particularly important in applications that require weight reduction. In addition, continuous fiber composite tapes are also corrosion-resistant and can be used for a long time in harsh environments, showing great application potential in many fields.

[0003] At present, the production methods of continuous fiber thermoplastic composite tapes include: solution impregnation, melt impregnation, powder impregnation, mixed weaving, film lamination, etc. Among them, melt impregnation has become the first choice for mass industrial production due to its high production efficiency and better impregnation effect. However, the above-mentioned various processing technologies cannot effectively control the distribution state of fiber and resin, and the distribution state will affect the flatness of the tape, the apparent quality state of the tape, and the interlayer bonding strength of the tape during composite, which makes the product have certain limitations in the production and application process.

[0004] Therefore, it is necessary to provide a composite strip production die, a composite strip production method and a composite strip to at least partially solve the above problems. Summary of the invention

[0005] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0006] In order to at least partially solve the above problems, the first aspect of the present invention provides a composite strip production mold, comprising:

[0007] Upper mold;

[0008] A lower mold, wherein the upper mold is arranged above the lower mold and is hinged to the lower mold, an immersion tank is arranged between the upper mold and the lower mold, and a composite strip outlet is arranged at the rear side of the immersion tank;

[0009] A pressure device is connected to the upper mold and is arranged above the composite strip outlet. The pressure device includes a pressure shaft, the upper and lower heights of the pressure shaft are adjustable, and different pressures can be applied to the composite strip.

[0010] Optionally, connecting ears are provided on the left and right sides of the upper mold, the connecting ears extend toward the lower mold, a rotating shaft is provided on the connecting ears, and the upper mold is connected to the lower mold via the connecting ears and the rotating shaft.

[0011] Optionally, the lower side surface of the pressure shaft is configured to be in an arc shape, and the arc-shaped lower side surface is located above the composite strip outlet, and pressure is applied to the composite strip through the lower side surface.

[0012] Optionally, a hardened wear-resistant layer is provided on the lower side of the pressure shaft.

[0013] Optionally, the pressure applying device further comprises:

[0014] There are more than two mounting seats, which are arranged on the rear side of the upper mold and above the composite strip outlet. A connecting plate is correspondingly arranged on the rear side of the pressure shaft, and the connecting plate is arranged close to both ends of the pressure shaft. The connecting plate and the mounting seat are connected by an adjusting bolt. By rotating the adjusting bolt, the distance between the connecting plate and the mounting seat can be adjusted, thereby adjusting the upper and lower heights of the pressure shaft.

[0015] Optionally, the adjusting bolt is passed through the mounting seat and threadedly matched with the mounting seat, the connecting plate is arranged below the mounting seat and connected with the adjusting bolt, and the connecting plate and the adjusting bolt can rotate freely;

[0016] Alternatively, the adjusting bolt passes through the mounting seat and can rotate freely with the mounting seat, and the connecting plate is arranged below the mounting seat and is threadably matched with the adjusting bolt.

[0017] Optionally, a mounting shaft is provided between the pressure shaft and the connecting plate, the axial direction of the mounting shaft is perpendicular to the axial direction of the pressure shaft, and the pressure shaft or the connecting plate can rotate relative to the mounting shaft.

[0018] Optionally, an axial hole is provided at the position where the pressure shaft or the connecting plate is connected to the mounting shaft, and the axial hole is a long hole, and the mounting shaft can move in the axial hole.

[0019] Optionally, the pressure device includes more than two pressure shafts, and each of the pressure shafts can adjust the upper and lower heights respectively.

[0020] Optionally, the left and right ends of each of the two or more pressure shafts can be adjusted in up and down height respectively.

[0021] A second aspect of the present invention provides a method for producing a composite strip, comprising:

[0022] The composite strip production mold described in any one of the above technical solutions adjusts the distribution position of the fibers in the composite strip by means of a pressure-applying device of the composite strip production mold.

[0023] A third aspect of the present invention provides a composite strip, which is manufactured by the composite strip production method described in the above technical solution.

[0024] Optionally, the composite strip comprises:

[0025] Resin base;

[0026] The fibers are arranged in the resin base layer, near the upper side, the middle part or the lower side of the resin base layer.

[0027] According to a composite tape production mold, a composite tape production method and a composite tape of the present invention, by setting a pressure shaft in the production mold, the fiber distribution position in the prepreg tape can be controlled, the flatness of the prepreg tape can be adjusted, the resin content on the upper and lower surfaces of the prepreg tape can be adjusted, and the effective shaping of the surface texture of the prepreg tape can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The embodiments of the present invention and their description are shown in the drawings to explain the principles of the present invention. In the drawings,

[0029] Figure 1 A perspective view of a composite strip production mold according to a preferred embodiment of the present invention;

[0030] Figure 2 A partially enlarged perspective view of a composite strip production mold according to a preferred embodiment of the present invention;

[0031] Figure 3 It is a partially enlarged left view of a composite strip production mold according to a preferred embodiment of the present invention;

[0032] Figure 4 It is a partial enlarged rear view of a composite strip production mold according to a preferred embodiment of the present invention;

[0033] Figure 5a A rear view of a composite strip production mold according to a preferred embodiment of the present invention and a corresponding cross-sectional view of the composite strip;

[0034] Figure 5b for Figure 5a Electron microscope photo of the cross section of the composite strip;

[0035] Figure 6aA rear view of a composite strip production mold according to a preferred embodiment of the present invention and a corresponding cross-sectional view of the composite strip;

[0036] Figure 6b for Figure 6a Electron microscope photo of the cross section of the composite strip;

[0037] Figure 7a A rear view of a composite strip production mold according to a preferred embodiment of the present invention and a corresponding cross-sectional view of the composite strip;

[0038] Figure 7b for Figure 7a Electron microscope photo of the cross section of the composite strip;

[0039] Figure 8a A rear view of a composite strip production mold according to a preferred embodiment of the present invention and a corresponding cross-sectional view of the composite strip;

[0040] Figure 8b for Figure 8a Electron microscope photo of the cross section of the composite strip;

[0041] Figure 9a A cross-sectional view of a composite strip in a sheet-joined state according to a preferred embodiment of the present invention;

[0042] Figure 9b A cross-sectional view of a composite strip in a sheet-joined state according to a preferred embodiment of the present invention;

[0043] Fig.9c A cross-sectional view of a composite strip in a sheet-joined state according to a preferred embodiment of the present invention;

[0044] Fig.10a is a cross-sectional view of a composite strip according to a preferred embodiment of the present invention;

[0045] Fig.10b is a cross-sectional view of a composite strip according to a preferred embodiment of the present invention;

[0046] Fig.10c is a cross-sectional view of a composite strip according to a preferred embodiment of the present invention;

[0047] Fig.10d is a cross-sectional view of a composite strip according to a preferred embodiment of the present invention;

[0048] Fig.10e is a cross-sectional view of a composite strip according to a preferred embodiment of the present invention;

[0049] Fig.10fFIG. 4 is a cross-sectional view of a composite strip according to a preferred embodiment of the present invention.

[0050] Description of reference numerals:

[0051] 100: Composite strip production mold 1: Lower mold

[0052] 11: Composite strip outlet 2: Upper die

[0053] 21: Connecting ear 22: Rotating shaft

[0054] 3: Pressure device 31: First pressure shaft

[0055] 32: First adjusting bolt 33: Second adjusting bolt

[0056] 34: Second pressure shaft 35: Third adjustment bolt

[0057] 36: Fourth adjusting bolt 4: Pressure device

[0058] 41: Mounting seat 42: Connecting plate

[0059] 43: Adjusting bolt 44: Pressure shaft

[0060] 45: Mounting shaft 46: Shaft hole

[0061] 5: Composite strip 50: Resin base

[0062] 51: resin-enriched layer 52: fiber DETAILED DESCRIPTION

[0063] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0064] In order to fully understand the present invention, a detailed description will be provided in the following description. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other embodiments.

[0065] Ordinal numbers such as "first" and "second" cited in the present invention are merely identifications and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of the "second component", and the term "second component" itself does not imply the existence of the "first component".

[0066] It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside" and similar expressions used in the present invention are for illustrative purposes only and are not limiting.

[0067] The invention discloses a composite strip production die, a composite strip production method and a composite strip.

[0068] Now, exemplary embodiments according to the present invention will be described in more detail with reference to the accompanying drawings.

[0069] like Figure 1 , Figure 2 As shown, the composite strip production mold 100 includes: an upper mold 2, a lower mold 1 and a pressure device 4;

[0070] The upper mold 2 and the lower mold 1 can both be made of metal materials, such as steel molds;

[0071] The upper mold 2 is arranged above the lower mold 1 and is hinged to the lower mold 1. The upper mold 2 and the lower mold 1 can be opened and closed. An impregnation tank is arranged between the upper mold 2 and the lower mold 1. A composite strip outlet 11 is arranged at the rear side of the impregnation tank. The impregnation tank may have a wavy structure.

[0072] The pressure device 4 is connected to the upper mold 2 and is disposed above the composite strip outlet 11 . The pressure device 4 includes a pressure shaft 44 . The upper and lower heights of the pressure shaft 44 are adjustable, and different pressures can be applied to the composite strip 5 .

[0073] Fibers (e.g., continuous glass fibers) enter the composite tape production mold 100 under tension, come into contact with the molten resin in the impregnation tank, complete the impregnation process of the fibers and the resin in the wavy impregnation tank, and emerge as a tape in the gap between the upper and lower molds at the tail end of the composite tape production mold 100. When emerging, the composite tape 5 is squeezed by the pressure device 4 to adjust the fiber distribution position.

[0074] You can refer to Figure 5a , Figure 5b , Figure 6a , Figure 6b Generally, the thickness of prepreg tape is about 0.15-0.4 mm. The figure takes 0.26 mm thick continuous glass fiber reinforced polypropylene resin tape as an example.

[0075] In this embodiment, in order to distinguish the types of the composite strip 5, ABC is used to classify the composite strip 5. Type A is that the fibers 52 are distributed in the middle of the composite strip 5, and the upper and lower layers are resin-enriched layers; Type B is that the fibers 52 are distributed on the upper side of the composite strip 5, and the lower side is the resin-enriched layer; Type C is that the fibers 52 are distributed on the lower side of the composite strip 5, and the upper side is the resin-enriched layer.

[0076] exist Figure 5a , Figure 5b In the embodiment, the pressure shaft 44 is located relatively high, and has no contact with the composite strip 5 and does not apply pressure. At this time, the composite strip 5 is in a free state, and the fiber 52 is relatively close to the middle of the composite strip 5, forming a composite strip 5 of type A. Figure 6a , Figure 6b (You can Figure 6b In the composite strip 5 (observed by rotating 90 degrees clockwise), the pressure shaft 44 is located relatively low, and pressure is applied to the composite strip 5. At this time, the molten resin is squeezed to the bottom of the composite strip 5, and the fibers 52 are relatively close to the upper side in the composite strip 5, forming a type B composite strip 5.

[0077] The composite strip production mold 100 in this embodiment can control the fiber distribution position in the composite strip 5 by setting a pressure shaft 44 in the production mold, realize the production of the composite strip 5 with adjustable flatness, realize the adjustment of the resin content on the upper and lower surfaces of the composite strip 5, and realize the effective shaping of the surface texture of the composite strip 5.

[0078] In one embodiment, if Figure 1 As shown, connecting ears 21 are provided on the left and right sides of the upper mold 2, and the connecting ears 21 extend toward the lower mold 1. A rotating shaft 22 is provided on the connecting ears 21. The upper mold 2 is connected to the lower mold 1 through the connecting ears 21 and the rotating shaft 22. The rotating shaft 22 is also connected to the lower mold 1. The connecting ears 21 and / or the lower mold 1 are provided with shaft holes corresponding to the rotating shaft 22. The rotating shaft 22 can rotate in the shaft hole. When the composite strip production mold 100 is opened, the upper mold 2 can rotate around the axial direction of the rotating shaft 22. The connecting ears 21 can be integrally formed or assembled on the left and right sides of the upper mold 2 by welding.

[0079] In one embodiment, if Figure 2 , Figure 3As shown, the lower side of the pressure shaft 44 is set to be in an arc shape, and the arc-shaped lower side is located above the composite strip outlet 11. The arc faces the composite strip 5 output from the composite strip outlet 11, and the composite strip 5 is pressed by the lower side. The lower side of the pressure shaft 44 is the part that contacts the composite strip 5. By setting it in an arc shape, it can ensure that the composite strip 5 is smoothly discharged, and even if it is squeezed by the pressure shaft 44, it will not hinder the movement of the composite strip 5. The cross-sectional shape of the pressure shaft 44 can be a combination of a rectangle and an arc, which has a high structural strength.

[0080] In one embodiment, if Figure 2 , Figure 3 As shown, the lower side of the pressure shaft 44 is provided with a hardened wear-resistant layer, which can ensure that the structural dimensions do not change even if it is in contact with the composite strip 5 for a long time, and has a long service life. The hardened wear-resistant layer can be a chrome-plated layer, which has a very high hardness. Depending on the composition of the plating solution and the process conditions, its hardness can vary in a wide range of 400 to 1200 HV. The chrome-plated layer has good heat resistance. When heated below 500°C, its glossiness and hardness do not change significantly. It begins to oxidize and discolor when the temperature is greater than 500°C, and the hardness begins to decrease when the temperature is greater than 700°C. The friction coefficient of the chrome-plated layer is small, especially the dry friction coefficient, which is the lowest among all metals, so the chrome-plated layer has good wear resistance. The chrome-plated layer also has good chemical stability. It does not react in alkali, sulfide, nitric acid and most organic acids, but it can be dissolved in hydrochloric acid (such as hydrochloric acid) and hot sulfuric acid.

[0081] In one embodiment, if Figure 1 , Figure 2 As shown, the pressure applying device 4 also includes:

[0082] There are more than two mounting seats 41, which are arranged on the rear side of the upper mold 2 and above the composite strip outlet 11. A connecting plate 42 is correspondingly arranged on the rear side of the pressure shaft 44. The connecting plate 42 is arranged close to both ends of the pressure shaft 44. The connecting plate 42 and the mounting seat 41 are connected by an adjusting bolt 43. By rotating the adjusting bolt 43, the distance between the connecting plate 42 and the mounting seat 41 can be adjusted, thereby adjusting the upper and lower heights of the pressure shaft 44.

[0083] In one embodiment, the adjusting bolt 43 is passed through the mounting seat 41 and threadedly matched with the mounting seat 41 , and the connecting plate 42 is disposed below the mounting seat 41 and connected to the adjusting bolt 43 , and the connecting plate 42 and the adjusting bolt 43 can rotate freely.

[0084] For example, a threaded hole is provided on the mounting seat 41 corresponding to the adjusting bolt 43, and a through hole is provided on the connecting plate 42 corresponding to the adjusting bolt 43. Gaskets are provided on the upper and lower sides of the connecting plate 42 to form a limiting structure for the connecting plate 42, which can push the connecting plate 42 downward and pull the connecting plate 42 upward, that is, the connecting plate 42 and the adjusting bolt 43 are in an axially relatively fixed relationship.

[0085] When the adjusting bolt 43 is rotated, since the mounting seat 41 and the connecting plate 42 cannot rotate along with the adjusting bolt 43, the adjusting bolt 43 can move axially on the mounting seat 41 by utilizing the threaded relationship. The adjusting bolt 43 can drive the connecting plate 42 to move closer to or away from the mounting seat 41, thereby realizing the up and down height adjustment of the pressure shaft 44.

[0086] In one embodiment, the adjusting bolt 43 passes through the mounting seat 41 and can rotate freely with the mounting seat 41 , and the connecting plate 42 is disposed below the mounting seat 41 and is threadedly engaged with the adjusting bolt 43 .

[0087] For example, the mounting seat 41 is provided with a through hole corresponding to the adjusting bolt 43, and gaskets are provided on the upper and lower sides of the mounting seat 41 to form a limiting structure for the mounting seat 41, that is, the mounting seat 41 and the adjusting bolt 43 are in an axially relatively fixed relationship; a threaded hole is provided on the connecting plate 42 corresponding to the adjusting bolt 43.

[0088] When the adjusting bolt 43 is rotated, since the mounting seat 41 and the connecting plate 42 cannot rotate along with the adjusting bolt 43, the adjusting bolt 43 can only rotate on the mounting seat 41 and cannot move axially. However, the adjusting bolt 43 can utilize the threaded relationship to drive the connecting plate 42 to move closer to or away from the mounting seat 41, thereby realizing the up and down height adjustment of the pressure shaft 44.

[0089] When the composite strip production mold 100 is provided with a pressure shaft 44, the upper mold 2 can be provided with two mounting seats 41 correspondingly. When the composite strip production mold 100 is provided with two pressure shafts 44, the upper mold 2 can be provided with four mounting seats 41 correspondingly. The mounting seats 41 are provided at a ratio of twice that of the pressure shafts 44. Figure 8a shown.

[0090] The mounting seat 41 can be integrally formed or assembled on the rear side of the upper mold 2 by welding, and the connecting plate 42 can be integrally formed or assembled on the rear side of the pressure shaft 44 by welding.

[0091] In one embodiment, if Figure 3 , Figure 4 As shown, a mounting shaft 45 is provided between the pressure shaft 44 and the connecting plate 42 . The axial direction of the mounting shaft 45 is perpendicular to the axial direction of the pressure shaft 44 . The pressure shaft 44 or the connecting plate 42 can rotate relative to the mounting shaft 45 .

[0092] By setting the mounting shaft 45, the pressure shaft 44 and the connecting plate 42 are not fixedly connected, but rotatably connected, allowing the two ends of the pressure shaft 44 to be at different heights. The two ends of the pressure shaft 44 can be adjusted to be at different heights according to the manufacturing process requirements, so that the fibers 52 in the same composite strip 5 can be adjusted to be at different heights in the resin base layer 50. Figure 7a , Figure 8a shown.

[0093] In one embodiment, if Figure 4 As shown, a shaft hole 46 is provided at the position where the pressure shaft 44 or the connecting plate 42 is connected to the mounting shaft 45 . The shaft hole 46 is a long hole, and the mounting shaft 45 can move in the shaft hole 46 .

[0094] An axial hole 46 with a long hole structure can be set only at one end of the pressure shaft 44, and the other end can still be an axial hole 46 with a round hole structure. Because the pressure shaft 44, the connecting plate 42, the adjusting bolt 43 and other components are all rigid components and cannot change their own lengths at will, only the mounting shaft 45 at one end of the pressure shaft 44 can move in the axial hole 46 with the long hole structure, and the two ends of the pressure shaft 44 can be at different heights.

[0095] In one embodiment, if Figure 7a As shown, the left and right ends of the pressure shaft 44 can be adjusted up and down respectively. According to the manufacturing process requirements, the two ends of the pressure shaft 44 can be adjusted to different heights, and accordingly, the fibers 52 of the same composite strip 5 are also at different heights in the resin base layer 50. Figure 7a , Figure 7b (You can Figure 7b As shown in the figure (the composite strip 5 is rotated 90 degrees counterclockwise to observe), the left end of the pressure shaft 44 is located relatively high, and the pressure applied to the composite strip 5 is relatively small, without excessively squeezing the resin base layer 50 downward. Correspondingly, the fiber 52 is relatively close to the middle of the composite strip 5, and the right end of the pressure shaft 44 is located relatively low, and the pressure applied to the composite strip 5 is relatively large, which obviously squeezes the resin base layer 50 downward. The fiber 52 is relatively close to the upper side in the composite strip 5, and finally a B+A type composite strip 5 is formed.

[0096] In one embodiment, if Figure 8a As shown, the pressure device 4 includes more than two pressure shafts 44, each of which can be adjusted in height up and down, and the left and right ends of each pressure shaft 44 can be adjusted in height up and down. According to the requirements of the manufacturing process, the two ends of the two pressure shafts 44 can be adjusted to be at different heights, and accordingly, the fibers 52 of the same composite tape 5 are also at different heights in the resin base layer 50.

[0097] like Figure 8a , Figure 8b (You can Figure 8b As shown in FIG. 1 , the composite tape 5 is rotated 90 degrees counterclockwise to observe, there are two sections of fibers 52 with the same structure in the same composite tape 5, both of which have their left ends close to the upper side of the composite tape 5 and their right ends close to the middle of the composite tape 5. The specific formation principle is: the left end of the first pressure shaft 31 is located relatively low, and the pressure applied to the composite tape 5 is relatively large, which obviously squeezes the resin base layer 50 downward, and the fibers 52 are relatively close to the upper side in the composite tape 5; the right end of the first pressure shaft 31 is located relatively high, and the pressure applied to the composite tape 5 is relatively small, and the resin base layer 50 is not excessively squeezed downward, and accordingly, the fibers 52 are relatively close to the middle of the composite tape 5; the second pressure shaft 34 and the first pressure shaft 31 are in the same state, and finally a multi-section B+A type composite tape 5 is formed.

[0098] By controlling the distribution position of the fibers 52 in the composite tape 5, the resin content on the upper and lower surfaces of the composite tape 5 can be adjusted to match the control of the interlayer bonding performance during the assembly production, such as Figure 9a , Figure 9b , Fig.9c As shown, Figure 9a The upper middle side is a C-type composite tape 5, and the lower side is a B-type composite tape 5. Since the fibers 52 are all located on one side close to each other, the combined bonding performance of the composite tape 5 is poor; Figure 9b The upper middle side is a composite tape 5 of type A, and the lower side is a composite tape 5 of type A. Since the fibers 52 are all located in the middle of the composite tape 5, the combined bonding performance of the composite tape 5 is improved; Fig.9c The upper middle side is a B-type composite tape 5, and the lower side is a C-type composite tape 5. Since the fibers 52 are all on the far side, the combined bonding performance of the composite tape 5 is further improved; the combined bonding performance of the composite tape 5 is improved from Figures 9a to 9c Get better in turn.

[0099] An embodiment of the present invention further provides a composite strip production method, comprising:

[0100] In the composite strip production mold 100 of any one of the above technical solutions, the distribution position of the fibers 52 in the composite strip 5 is adjusted by the pressure applying device 4 of the composite strip production mold 100 .

[0101] An embodiment of the present invention further provides a composite strip, which is manufactured by the composite strip production method in the above technical solution.

[0102] In one embodiment, if Fig.10a , Fig.10b , Fig.10c , Fig.10d , Fig.10e , Fig.10f As shown, the composite strip 5 comprises:

[0103] Resin base layer 50;

[0104] The fibers 52 are disposed in the resin base layer 50 , and are disposed near the upper side, the middle part, or the lower side of the resin base layer 50 .

[0105] Fig.10a , Fig.10b In the figure, the fiber 52 is close to the upper side of the resin base layer 50, which belongs to the composite tape 5 of type B; Fig.10c , Fig.10d In the figure, the fiber 52 is close to the middle of the resin base layer 50, which belongs to the composite tape 5 of type A; Fig.10e , Fig.10f In the figure, the fiber 52 is close to the lower side of the resin base layer 50, which belongs to the C type composite tape 5.

[0106] The composite strip production die, composite strip production method and composite strip according to the present invention have the following advantages:

[0107] The present invention can realize the production of prepreg tape with adjustable flatness by controlling the fiber distribution position in the prepreg tape. In different application scenarios of prepreg tape, there are different requirements for warpage. The laying of cross-cut materials for assembly requires the tape to be flat, and the tape needs to have a certain warpage during winding operation to improve the coating effect.

[0108] The present invention can adjust the resin content on the upper and lower surfaces of the prepreg tape by controlling the fiber distribution position in the prepreg tape, so as to match the control of the interlayer bonding performance during the assembly production, such as Figure 9a , Figure 9b , Fig.9c In the process, the prepreg tape combination bonding performance is from Figures 9a to 9c Get better in turn.

[0109] The present invention can achieve effective shaping of the surface texture during subsequent processing of the assembled product by controlling the fiber distribution position in the prepreg tape, such as a rough-textured Teflon belt. When producing assembled products, when the apparent resin content is high, the rough texture of the assembled finished product is uniform and beautiful, avoiding the influence of the glass fiber skeleton on the molding texture, which is comparable to the pure resin molding state, such as Fig.10a , Fig.10b , Fig.10c , Fig.10d , Fig.10e , Fig.10f The three states shown are Figures 10a to 10f , the interference of the glass fiber skeleton on the appearance texture is gradually reduced to disappear, and the texture molding state is gradually improved.

[0110] The present invention can produce segmented customized products by combining multiple pressure shafts to meet the needs of more complex application scenarios.

[0111] The processes and steps described in all the above preferred embodiments are only examples. Unless adverse effects occur, various processing operations can be performed in a sequence different from the sequence of the above processes. The sequence of steps in the above processes can also be increased, merged or deleted according to actual needs.

[0112] In understanding the scope of the present invention, the term "comprise" and its derivatives as used herein are intended to be open terms, which specify the existence of recorded features, elements, components, groups, wholes and / or steps, but do not exclude the existence of other unrecorded features, elements, components, groups, wholes and / or steps. This concept also applies to words with similar meanings, such as the terms "include", "have" and their derivatives.

[0113] The terms "attached" or "attached" as used herein include: a configuration where an element is directly secured to another element by directly securing the element to the other element; a configuration where an element is indirectly secured to another element by securing the element to an intermediate member which in turn is secured to the other element; and a configuration where one element is integral with the other element, i.e., one element is substantially a part of the other element. This definition also applies to words with similar meanings such as "connect," "connect," "couple," "mount," "bond," "fix," and their derivatives. Finally, terms of degree such as "substantially," "approximately," and "approximately" as used herein represent the amount of deviation that modifies the term such that the end result will not be significantly changed.

[0114] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. The features described herein in one embodiment may be applied to another embodiment individually or in combination with other features, unless the feature is not applicable or otherwise specified in the other embodiment.

[0115] The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and description, and are not intended to limit the present invention to the described embodiments. In addition, it can be understood by those skilled in the art that the present invention is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention.

Claims

1. A composite strip production mold, characterized in that: include: Upper mold (2); A lower mold (1), the upper mold (2) is arranged above the lower mold (1) and is hinged to the lower mold (1), an immersion tank is arranged between the upper mold (2) and the lower mold (1), and a composite strip outlet (11) is arranged at the rear side of the immersion tank; A pressure device (4), the pressure device (4) is connected to the upper mold (2) and is arranged above the composite strip outlet (11), the pressure device (4) includes a pressure shaft (44), the upper and lower heights of the pressure shaft (44) are adjustable, and different pressures can be applied to the composite strip (5).

2. The composite strip production mold according to claim 1, characterized in that: The upper mold (2) is provided with connecting ears (21) on the left and right sides, the connecting ears (21) extend toward the lower mold (1), and a rotating shaft (22) is provided on the connecting ears (21). The upper mold (2) is connected to the lower mold (1) via the connecting ears (21) and the rotating shaft (22).

3. The composite strip production mold according to claim 1, characterized in that: The lower side surface of the pressure shaft (44) is arranged in an arc shape, and the arc-shaped lower side surface is located above the composite strip outlet (11), and pressure is applied to the composite strip (5) through the lower side surface.

4. The composite strip production mold according to claim 3, characterized in that: The lower side of the pressure shaft (44) is provided with a hardened wear-resistant layer.

5. The composite strip production mold according to claim 1, characterized in that: The pressure applying device (4) further comprises: There are more than two mounting seats (41), wherein the mounting seats (41) are arranged on the rear side of the upper mold (2) and are located above the composite strip outlet (11); a connecting plate (42) is correspondingly arranged on the rear side of the pressure shaft (44); the connecting plate (42) is arranged close to both ends of the pressure shaft (44); the connecting plate (42) and the mounting seats (41) are connected by adjusting bolts (43); by rotating the adjusting bolts (43), the distance between the connecting plate (42) and the mounting seats (41) can be adjusted, thereby adjusting the upper and lower heights of the pressure shaft (44).

6. The composite strip production mold according to claim 5, characterized in that: The adjusting bolt (43) is inserted through the mounting seat (41) and threadedly matched with the mounting seat (41); the connecting plate (42) is arranged below the mounting seat (41) and connected to the adjusting bolt (43); the connecting plate (42) and the adjusting bolt (43) can rotate freely; Alternatively, the adjusting bolt (43) is inserted through the mounting seat (41) and can rotate freely with respect to the mounting seat (41), and the connecting plate (42) is arranged below the mounting seat (41) and is threadably matched with the adjusting bolt (43).

7. The composite strip production mold according to claim 5, characterized in that: A mounting shaft (45) is provided between the pressure shaft (44) and the connecting plate (42), and the axial direction of the mounting shaft (45) is perpendicular to the axial direction of the pressure shaft (44). The pressure shaft (44) or the connecting plate (42) can rotate relative to the mounting shaft (45).

8. The composite strip production mold according to claim 7, characterized in that: An axial hole (46) is provided at the position where the pressure shaft (44) or the connecting plate (42) is connected to the mounting shaft (45). The axial hole (46) is a long hole, and the mounting shaft (45) can move in the axial hole (46).

9. The composite strip production mold according to claim 1, characterized in that: The pressure device (4) comprises more than two pressure shafts (44), and each of the pressure shafts (44) can adjust the upper and lower heights respectively.

10. The composite strip production mold according to claim 9, characterized in that: The left and right ends of each of the two or more pressure shafts (44) can be adjusted in up and down height respectively.

11. A method for producing a composite strip, characterized in that: include: The composite strip production mold (100) as described in any one of claims 1 to 10, wherein the distribution position of the fibers (52) in the composite strip (5) is adjusted by means of a pressure-applying device (4) of the composite strip production mold (100).

12. A composite strip, characterized in that: The composite strip is manufactured by the composite strip production method according to claim 11.

13. The composite strip according to claim 12, characterized in that The composite strip (5) comprises: Resin base layer (50); Fibers (52), the fibers (52) are arranged in the resin base layer (50), and are arranged near the upper side, the middle part or the lower side of the resin base layer (50).

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