Thermoplastic resin fiber infiltration device

Abstract

The utility model provides a thermoplastic resin fiber infiltration device, which relates to the field of composite material preparation and comprises a first plastic extruding machine joint mould, a second plastic extruding machine joint mould, a third plastic extruding machine joint mould and a fourth plastic extruding machine joint mould, after the first plastic extruding machine joint mold, the second plastic extruding machine joint mold, the third plastic extruding machine joint mold and the fourth plastic extruding machine joint mold are connected to form a cross-shaped mold, fiber channels are correspondingly arranged on the connecting surfaces of the two plastic extruding machine joint molds which are connected up and down; resin runners are correspondingly arranged on the connecting surfaces of the two plastic extruding machine joint molds which are connected left and right; heating holes for mounting heating rods are formed in the first plastic extruding machine joint mold and the third plastic extruding machine joint mold; and a thermocouple temperature measuring hole is formed in the first plastic extruding machine joint mold, so that the problem of insufficient and non-uniform resin infiltration in the prior art can be effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of composite material preparation, and in particular to a thermoplastic resin fiber impregnation device. Background Technology

[0002] Prepreg tape is a composite material made of fiber materials and resin impregnation. Compared with continuous fiber reinforced thermosetting composites, continuous fiber reinforced thermoplastic composites have excellent toughness and damage tolerance, fatigue resistance, as well as advantages such as weldability and recyclability. Therefore, it shows great development prospects in the fields of national defense, aerospace, and rail transportation.

[0003] Currently, common methods for preparing continuous fiber-reinforced thermoplastic composite prepreg tapes include solution impregnation, melt impregnation, in-situ impregnation, powder impregnation, film lamination, and fiber blending. Among these, melt impregnation has advantages such as simple process, easy operation, and low environmental pollution, and has great potential for market promotion and application. The core step of melt impregnation is the compounding of fibers and thermoplastic resin matrix within an impregnation mold, where the resin is pressed into the fibers through the internal structure of the mold.

[0004] In the preparation of thermoplastic prepreg tapes, the industrial sector commonly uses melt impregnation equipment for large-scale continuous production. This process is characterized by fiber spreading widths of 800-1500 mm and resin melting rates stable at 5-8 kg / h. This production model, through an automated unwinding-impregnation-rewinding system, can achieve a daily production capacity of 2-3 tons, but the single feed rate needs to be maintained above 200 kg to ensure process stability. In contrast, prepreg tape research conducted by research institutions in a laboratory environment exhibits significant differences: 1. Raw material consumption is typically controlled at 50-200 g to accommodate multiple parallel experiments; 2. Equipment operating costs need to be reduced to 1 / 20-1 / 50 of industrial production lines (approximately 200-500 RMB per batch); 3. Equipment is required to have rapid parameter switching capabilities (e.g., temperature adjustment response time < 5 min). Existing industrial equipment suffers from technical bottlenecks such as minimum material feeding threshold (>50kg) and excessively high energy consumption (>80kW·h / batch), making it difficult to meet the miniaturized and flexible manufacturing needs of scientific research scenarios. Utility Model Content

[0005] To address the technical problems existing in the prior art, this utility model provides a thermoplastic resin fiber impregnation device to solve the problem of insufficient resin impregnation during the production of prepreg tape.

[0006] The technical solution is as follows:

[0007] A thermoplastic resin fiber impregnation device, comprising:

[0008] A first extruder joint mold and a second extruder joint mold that are symmetrically arranged and have the same structure;

[0009] The third and fourth extruder joint molds are symmetrically arranged and have the same structure.

[0010] The first extruder joint mold and the third extruder joint mold are connected left and right, and the second extruder joint mold and the fourth extruder joint mold are connected left and right;

[0011] When the first extruder joint mold, the second extruder joint mold, the third extruder joint mold, and the fourth extruder joint mold are connected to form a cross-shaped mold:

[0012] Fiber channels are provided on the connecting surfaces of the two extruder joint molds that are connected vertically.

[0013] Resin flow channels are provided on the connecting surfaces of the two extruder joint molds that are connected on the left and right sides.

[0014] The first extruder joint mold and the third extruder joint mold are provided with heating holes for installing heating rods;

[0015] The first extruder joint mold is equipped with a thermocouple temperature measuring hole.

[0016] Optionally, the first extruder joint mold and the third extruder joint mold are arranged in an L-shaped block configuration;

[0017] The surface of the short side of the first extruder joint mold is connected to the third extruder joint mold;

[0018] The surfaces of the long side of the first extruder joint mold and the long side of the second extruder joint mold are connected;

[0019] The surface of the short side of the second extruder joint mold is connected to the fourth extruder joint mold.

[0020] Optionally, the resin flow channel includes: a flow channel inlet;

[0021] The first extruder joint mold, the second extruder joint mold, the third extruder joint mold and the fourth extruder joint mold are provided with a quarter-circle arc inner wall at the connection of the L-shaped corner on the same plane;

[0022] When the first extruder joint mold, the second extruder joint mold, the third extruder joint mold and the fourth extruder joint mold are connected to form a cross-shaped mold, a round hole is formed at the center of the intersection of the cross-shaped molds. The round hole at the center of the intersection of the cross-shaped molds is the inlet of the flow channel.

[0023] Optionally, the resin flow channel further includes: an oval groove;

[0024] The first extruder joint mold and the third extruder joint mold are respectively provided with a half-slender circular groove of the same structure on their mating surfaces;

[0025] The second extruder joint mold and the fourth extruder joint mold are respectively provided with a half-slender circular groove of the same structure on their mating surfaces;

[0026] The half-slender groove of the first extruder joint mold and the half-slender groove of the second extruder joint mold form a closed loop of the slender groove.

[0027] After the cross-shaped mold is formed, the oval groove connects with the runner inlet.

[0028] Optionally, the tail of the oval groove is connected to the fiber channel, and the tail of the oval groove is provided with a boss and a ramp;

[0029] The ramps and bosses are used to distribute the resin in a uniform molten flow state within the resin channel, and to enable the resin to be evenly distributed on the surface of the fibers.

[0030] Optionally, the shorter side length of the first extruder joint mold is equal to the two side lengths of the third extruder joint mold.

[0031] Optionally, the fiber channel includes: a rectangular groove on the lower surface of the long side of the first extruder joint mold, a rectangular groove on the upper surface of the long side of the second extruder joint mold, a rectangular groove on the lower surface of the horizontal side of the third extruder joint mold, and a rectangular groove on the upper surface of the horizontal side of the fourth extruder joint mold.

[0032] The depth of the rectangular groove of the first extruder joint mold and the depth of the rectangular groove of the second extruder joint mold increase sequentially from the end of the long side of the first extruder joint mold to the end of the horizontal side of the third extruder joint mold.

[0033] Multiple dipping columns are respectively arranged in the rectangular groove of the first extruder joint mold and the rectangular groove of the second extruder joint mold, and the dipping columns of the first extruder joint mold and the dipping columns of the second extruder joint mold mesh with each other.

[0034] The fiber channel entrance is located at the end of the rectangular groove of the third extruder joint mold and the end of the rectangular groove of the fourth extruder joint mold. The ends of the rectangular grooves of the third extruder joint mold and the ends of the rectangular grooves of the fourth extruder joint mold are respectively provided with rounded chamfers, and the two rounded chamfers are arranged opposite each other.

[0035] The beneficial effects of the technical solution provided by this utility model embodiment include at least the following:

[0036] The fiber channel inlet features a rounded corner structure to effectively prevent fiber damage during mold passage and ensure smooth fiber entry. Interlocking impregnation columns within the fiber channel allow for one-sided extrusion of the molten resin entering the channel, resulting in better wetting. The rear section of the fiber channel is designed with a V-shaped ramp structure, applying pressure to the resin-coated fibers and promoting further penetration of the resin into the fiber interior, thus significantly improving wetting efficiency.

[0037] A boss structure is provided at the end of the resin flow channel, which can block the unevenly distributed resin in advance and promote the redistribution of molten resin in the width direction, thereby ensuring that the resin flowing out of the outlet can be evenly distributed and further improving the uniformity of fiber impregnation.

[0038] The mold has heating holes inside and thermocouple temperature sensing holes on the surface. During use, heating can be achieved by inserting a heating rod and combining it with a thermocouple temperature sensor. This allows for precise control of the temperature inside the mold, keeping the resin in a molten and flowing state, effectively reducing the resin viscosity, and thus significantly improving the resin's wetting efficiency on the fibers.

[0039] The thermoplastic resin fiber impregnation device of this invention can effectively solve the problem of uneven impregnation during the production of fiber prepreg tape in the prior art. It has the characteristics of simple structure, convenient operation and strong applicability, and is especially suitable for laboratory and industrial production environments. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the overall structure of the device provided in this embodiment of the utility model;

[0042] Figure 2 This is an exploded structural diagram of the device provided in this embodiment of the utility model;

[0043] Figure 3 This is a schematic diagram of the structure of the second extruder connector mold provided in this embodiment of the utility model;

[0044] Figure 4 This is a schematic diagram of the connection between the first extruder joint mold and the second extruder joint mold provided in this embodiment of the utility model;

[0045] Figure 5This is a schematic diagram of the fiber and resin flow direction provided in an embodiment of the present invention.

[0046] Icon labels:

[0047] a1. First extruder joint mold; a2. Second extruder joint mold; a3. Third extruder joint mold; a4. Fourth extruder joint mold; 3. Bolt hole; 4. Runner inlet; 5. Heating hole; 6. Thermocouple temperature measuring hole; 7. Resin runner; 7-1. Boss; 8. Fiber channel; 8-1. Fiber channel inlet; 8-2. Impregnation column. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0049] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0050] It should be noted that the terms "upper", "lower", "left", "right", "front", and "back" used in this utility model are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0051] like Figures 1 to 5 As shown, a thermoplastic resin fiber impregnation device includes: a first extruder joint mold a1, a second extruder joint mold a2, a third extruder joint mold a3 and a fourth extruder joint mold a4.

[0052] The first extruder joint mold a1 and the second extruder joint mold a2 are symmetrically arranged and have the same structure.

[0053] The third extruder joint mold a3 and the fourth extruder joint mold a4 are symmetrically arranged and have the same structure.

[0054] The first extruder joint mold a1 and the third extruder joint mold a3 are connected left and right, and the second extruder joint mold a2 and the fourth extruder joint mold a4 are connected left and right; when the first extruder joint mold a1, the second extruder joint mold a2, the third extruder joint mold a3 and the fourth extruder joint mold a4 are connected to form a cross-shaped mold:

[0055] Fiber channels 8 are provided on the connecting surfaces of the two extruder joint molds that are connected vertically.

[0056] Resin flow channels 7 are provided on the connecting surfaces of the two extruder joint molds that are connected on the left and right sides.

[0057] The first extruder joint mold a1 and the third extruder joint mold a3 are provided with heating holes 5 for installing heating rods; the first extruder joint mold a1 is provided with thermocouple temperature measuring holes 6.

[0058] Multiple heating holes 5 can be provided. Multiple heating holes 5 are vertically provided on the top of the mold a3 of the first extruder joint and the third extruder joint, and heating holes 5 are horizontally provided at the long side end of the first extruder joint.

[0059] The first extruder joint mold a1 and the third extruder joint mold a3 are arranged in an L-shaped block; the surface of the short side of the first extruder joint mold a1 is connected to the surface of the third extruder joint mold a3; the surface of the long side of the first extruder joint mold a1 is connected to the surface of the long side of the second extruder joint mold a2; and the surface of the short side of the second extruder joint mold a2 is connected to the fourth extruder joint mold a4.

[0060] The four extruder joint molds are connected by setting multiple screw holes, and the two are connected by bolts.

[0061] Countersunk bolt hole 3 is generally selected to ensure that the mold surface is flat and that glass fiber heating tape can be wrapped around its exterior.

[0062] In one specific embodiment, the resin channel 7 includes: a channel inlet 4 and an oval groove;

[0063] Regarding flow channel inlet 4:

[0064] The first extruder joint mold a1, the second extruder joint mold a2, the third extruder joint mold a3, and the fourth extruder joint mold a4 are provided with a quarter-circle arc inner wall at the connection of the L-shaped corner on the same plane.

[0065] When the first extruder joint mold a1, the second extruder joint mold a2, the third extruder joint mold a3 and the fourth extruder joint mold a4 are connected to form a cross-shaped mold, a round hole is formed at the intersection of the cross-shaped molds, and the round hole at the intersection of the cross-shaped molds is the flow channel inlet 4.

[0066] Regarding the oval-shaped groove:

[0067] The first extruder joint mold a1 and the third extruder joint mold a3 are respectively provided with a half-slender oval groove of the same structure on their mating surfaces; the second extruder joint mold a2 and the fourth extruder joint mold a4 are respectively provided with a half-slender oval groove of the same structure on their mating surfaces; the half-slender oval groove of the first extruder joint mold a1 and the half-slender oval groove of the second extruder joint mold a2 form a closed-loop oval groove; after the cross-shaped mold is formed, the oval groove is connected to the flow channel inlet 4.

[0068] The tail of the oval groove is connected to the fiber channel 8, and the tail of the oval groove is provided with a boss 7-1 and a slope.

[0069] The ramps and bosses 7-1 are used to distribute the resin in an average molten flow state within the resin channel 7, and to enable the resin to be evenly distributed on the surface of the fiber.

[0070] The four extruder joint molds (first extruder joint mold a1, second extruder joint mold a2, third extruder joint mold a3 and fourth extruder joint mold a4) are provided with bosses 7-1 and ramps in their half-segmented circular grooves. The ramps are located at the connection between the half-segmented circular grooves and the corresponding fiber channels 8 (here, "corresponding" means that the ramp of the first extruder joint mold a1 is located at the connection between the half-segmented circular groove of the first extruder joint mold a1 and the fiber channel 8 of the first extruder joint mold a1). The bosses 7-1 are located inside the half-segmented circular grooves and next to the ramps.

[0071] In one specific implementation, the short side length of the first extruder joint mold a1 is equal to the two side lengths of the third extruder joint mold a3.

[0072] The long side of the first extruder joint mold a1 is the fiber discharge end. The reason why the length of the long side of the first extruder joint mold a1 is greater than the length of the feed end (the horizontal side of the third extruder joint mold a3) is that the fiber channel 8 is longer after the fiber is impregnated than the channel before the fiber is impregnated, so that the fiber can be fully impregnated in the channel and the impregnation effect can be improved.

[0073] In one specific embodiment, the fiber channel 8 includes: a rectangular groove on the lower surface of the long side of the first extruder joint mold a1, a rectangular groove on the upper surface of the long side of the second extruder joint mold a2, a rectangular groove on the lower surface of the horizontal side of the third extruder joint mold a3, and a rectangular groove on the upper surface of the horizontal side of the fourth extruder joint mold a4.

[0074] The depth of the rectangular groove of the first extruder joint mold a1 and the depth of the rectangular groove of the second extruder joint mold a2 increase sequentially from the end of the long side of the first extruder joint mold a1 to the end of the horizontal side of the third extruder joint mold a3.

[0075] Multiple dip columns 8-2 are respectively provided in the rectangular groove of the first extruder joint mold a1 and the rectangular groove of the second extruder joint mold a2, and the dip columns 8-2 of the first extruder joint mold a1 and the dip columns 8-2 of the second extruder joint mold a2 mesh with each other.

[0076] The entrance of the fiber channel 8 is located at the end of the rectangular groove of the third extruder joint mold a3 and the rectangular groove of the fourth extruder joint mold a4. The ends of the rectangular grooves of the third extruder joint mold a3 and the fourth extruder joint mold a4 are respectively provided with rounded chamfers, and the two rounded chamfers are arranged opposite each other.

[0077] In this embodiment, the depth of the fiber channel 8 gradually decreases along the fiber movement direction to apply pressure to the molten resin and improve resin impregnation efficiency. The fiber channel 8 has raised impregnation pillars 8-2 inside to apply impregnation pressure to the passing fibers, further improving resin impregnation efficiency. The fiber channel inlet 8-1 has rounded corners. Furthermore, the gradual decrease in the depth of the fiber channel 8 along the fiber movement direction (i.e., the depth of the rectangular groove in the first extruder joint mold a1 and the second extruder joint mold a2 increases sequentially from the long side end of the first extruder joint mold a1 to the horizontal side end of the third extruder joint mold a3) is to prevent damage to the fibers at the inlet from the mold.

[0078] In the first implementation, the four parts of the mold are first assembled together using countersunk bolts. Simultaneously, fibers are inserted into the fiber channel 8 within the mold (through the inlet of fiber channel 8). The assembled mold (cross-shaped mold) is then connected to the extruder at the injection port using threads. A custom-sized heating rod is inserted into the heating rod hole of the mold. A thermocouple temperature sensor is installed into the temperature sensing hole of the mold.

[0079] Turn on the heating rod to preheat the mold and observe the temperature. When the temperature rises to the set temperature, turn on the injection molding machine and inject the molten resin into the mold, while simultaneously pulling the fibers through the mold. After passing through the mold, allow it to cool naturally. Adjust the injection molding machine speed and pressure to ensure smooth production of the fiber prepreg.

[0080] In the second embodiment, the four parts of the extruder joint mold are connected by countersunk bolts, the fiber is inserted into the fiber channel 8 in the mold (through the entrance of the fiber channel 8), a thermocouple temperature sensor is installed to monitor the mold temperature, and glass fiber heating tape is wrapped around the surface of the mold to heat the mold.

[0081] Preheat the mold with the fiberglass heating tape and observe the temperature. When the temperature reaches the set temperature, turn on the injection molding machine and inject the molten resin into the mold while simultaneously guiding the fiber through it. Allow the fiber to cool naturally after passing through the mold. Adjust the injection molding machine speed and pressure to ensure smooth production of the fiber prepreg.

[0082] In addition, in both embodiments, the fiber channel 8 is composed of a fiber channel 8 before fiber impregnation (the fiber channel 8 formed by the third extruder joint mold a3 and the fourth extruder joint mold a4) and a fiber channel 8 after fiber impregnation (the fiber channel 8 formed by the first extruder joint mold a1 and the second extruder joint mold a2). The fiber channel 8 before fiber impregnation can preheat the incoming fiber bundle and provide space for the bolt connection of the mold. The fiber channel 8 after fiber impregnation is longer than the fiber channel before fiber impregnation, which can make the fiber fully impregnated in the channel and improve the impregnation effect.

[0083] Furthermore, in this embodiment, the direction of fiber movement in fiber channel 8 is as follows: Figure 5 As shown, in this embodiment, the resin flows in the resin channel in the following direction: Figure 4 As shown, in addition, Figure 5 The cross-section is the resin flow channel on the side connected to the fiber channel 8. The resin flow channel at the resin inlet divides the incoming resin into upper and lower parts and squeezes it to the bend to the flow channel on the other side of the resin flow channel. The figure shows the trend of the resin in the flow channel on the other side away from the inlet side.

[0084] The fiber channel inlet 8-1 features a rounded corner structure to effectively prevent fiber damage during mold passage and ensure smooth fiber entry. The fiber channel 8 contains interlocking impregnation columns 8-2, which can unilaterally extrude the molten resin entering the fiber channel 8 for better impregnation. The rear half of the fiber channel 8 is designed with a V-shaped ramp structure, which applies pressure to the fibers coated with molten resin, promoting further penetration of the molten resin into the fiber interior, thereby significantly improving impregnation efficiency.

[0085] A boss 7-1 structure is provided at the end of the resin flow channel 7, which can block the unevenly distributed resin in advance and promote the redistribution of molten resin in the width direction, thereby ensuring that the resin flowing out of the outlet can be evenly distributed and further improving the uniformity of fiber impregnation.

[0086] The mold has heating holes 5 inside and thermocouple temperature measuring holes 6 on its surface. During use, heating can be achieved by inserting a heating rod and combining it with a thermocouple temperature sensor. This allows for precise control of the temperature inside the mold, keeping the resin in a molten and flowing state, effectively reducing the resin viscosity, and thus significantly improving the resin's wetting efficiency on the fibers.

[0087] The thermoplastic resin fiber impregnation device of this invention can effectively solve the problem of uneven impregnation during the production of fiber prepreg tape in the prior art. It has the characteristics of simple structure, convenient operation and strong applicability, and is especially suitable for laboratory and industrial production environments.

[0088] The following points need to be explained:

[0089] (1) The accompanying drawings of this utility model embodiment only involve the structure involved in this utility model embodiment. Other structures can refer to the general design.

[0090] (2) For clarity, the thickness of layers or regions is enlarged or reduced in the drawings used to describe embodiments of the present invention, i.e., these drawings are not drawn to scale. It is understood that when an element such as a layer, film, region or substrate is referred to as being “above” or “below” another element, the element may be “directly” located “above” or “below” the other element or there may be intermediate elements.

[0091] (3) Where there is no conflict, the embodiments of this utility model and the features in the embodiments can be combined with each other to obtain new embodiments.

[0092] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. The protection scope of this utility model shall be determined by the protection scope of the claims.

Claims

1. A thermoplastic resin fiber impregnation device, characterized in that, include: A first extruder joint mold and a second extruder joint mold that are symmetrically arranged and have the same structure; The third and fourth extruder joint molds are symmetrically arranged and have the same structure. The first extruder joint mold and the third extruder joint mold are connected left and right, and the second extruder joint mold and the fourth extruder joint mold are connected left and right; When the first extruder joint mold, the second extruder joint mold, the third extruder joint mold, and the fourth extruder joint mold are connected to form a cross-shaped mold: Fiber channels are provided on the connecting surfaces of the two extruder joint molds that are connected vertically. Resin flow channels are provided on the connecting surfaces of the two extruder joint molds that are connected on the left and right sides. The first extruder joint mold and the third extruder joint mold are provided with heating holes for installing heating rods; The first extruder joint mold is equipped with a thermocouple temperature measuring hole.

2. The thermoplastic resin fiber impregnation device according to claim 1, characterized in that, The first extruder joint mold and the third extruder joint mold are arranged in an L-shaped block configuration; The surface of the short side of the first extruder joint mold is connected to the third extruder joint mold; The surfaces of the long side of the first extruder joint mold and the long side of the second extruder joint mold are connected; The surface of the short side of the second extruder joint mold is connected to the fourth extruder joint mold.

3. The thermoplastic resin fiber impregnation device according to claim 2, characterized in that, The resin flow channel includes: a flow channel inlet; The first extruder joint mold, the second extruder joint mold, the third extruder joint mold and the fourth extruder joint mold are provided with a quarter-circle arc inner wall at the connection of the L-shaped corner on the same plane; When the first extruder joint mold, the second extruder joint mold, the third extruder joint mold and the fourth extruder joint mold are connected to form a cross-shaped mold, a round hole is formed at the center of the intersection of the cross-shaped molds. The round hole at the center of the intersection of the cross-shaped molds is the inlet of the flow channel.

4. The thermoplastic resin fiber impregnation device according to claim 3, characterized in that, The resin flow channel further includes: an oval groove; The first extruder joint mold and the third extruder joint mold are respectively provided with a half-slender circular groove of the same structure on their mating surfaces; The second extruder joint mold and the fourth extruder joint mold are respectively provided with a half-slender circular groove of the same structure on their mating surfaces; The half-slender groove of the first extruder joint mold and the half-slender groove of the second extruder joint mold form a closed loop of the slender groove. After the cross-shaped mold is formed, the oval groove connects with the runner inlet.

5. The thermoplastic resin fiber impregnation device according to claim 4, characterized in that, The tail of the oval groove is connected to the fiber channel, and the tail of the oval groove is provided with a boss and a slope. The ramps and bosses are used to distribute the resin in a uniform molten flow state within the resin channel, and to enable the resin to be evenly distributed on the surface of the fibers.

6. The thermoplastic resin fiber impregnation apparatus according to claim 5, characterized in that, The length of the short side of the first extruder joint mold is equal to the lengths of both sides of the third extruder joint mold.

7. The thermoplastic resin fiber impregnation device according to claim 6, characterized in that, The fiber channel includes: a rectangular groove on the lower surface of the long side of the first extruder joint mold, a rectangular groove on the upper surface of the long side of the second extruder joint mold, a rectangular groove on the lower surface of the horizontal side of the third extruder joint mold, and a rectangular groove on the upper surface of the horizontal side of the fourth extruder joint mold. The depth of the rectangular groove of the first extruder joint mold and the depth of the rectangular groove of the second extruder joint mold increase sequentially from the end of the long side of the first extruder joint mold to the end of the horizontal side of the third extruder joint mold. Multiple dipping columns are respectively arranged in the rectangular groove of the first extruder joint mold and the rectangular groove of the second extruder joint mold, and the dipping columns of the first extruder joint mold and the dipping columns of the second extruder joint mold mesh with each other.

8. The thermoplastic resin fiber impregnation device according to claim 7, characterized in that, The fiber channel entrance is located at the end of the rectangular groove of the third extruder joint mold and the end of the rectangular groove of the fourth extruder joint mold. The ends of the rectangular grooves of the third extruder joint mold and the ends of the rectangular grooves of the fourth extruder joint mold are respectively provided with rounded chamfers, and the two rounded chamfers are arranged opposite each other.

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