Melt impregnation equipment

Abstract

The melt impregnation equipment comprises a melt impregnation machine head, a pre-dispersion assembly and a melt impregnation assembly, the melt impregnation assembly comprises a plurality of first tension rollers, a plurality of second tension rollers and an ultrasonic generation part, and the first tension rollers and the second tension rollers are arranged in a melt impregnation cavity channel at intervals; the periphery of the first tension roller is connected with a first elastic piece, and the end, away from the first tension roller, of the first elastic piece is connected with the upper inner wall of the melt dipping cavity channel. The projection of the second tension roller projected on the upper inner wall of the melt dipping cavity channel is located between the adjacent first tension rollers, the periphery of the second tension roller is connected with a second elastic piece, and the end, away from the second tension roller, of the second elastic piece is connected with the lower inner wall of the melt dipping cavity channel; the ultrasonic wave generating piece is arranged in the melt dipping cavity channel. According to the invention, the melt in the melt impregnation cavity channel can be effectively promoted to flow, resin carbonization caused by long retention time of the melt is prevented, the impregnation effect is more balanced, and the yield and quality of products can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of high polymer material production, especially to a kind of melt impregnation equipment. BACKGROUND

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

[0003] At present, in the melt impregnation equipment for continuous fiber reinforced thermoplastic resin composite material, the continuous fiber bundle often cannot be uniformly, fully and effectively melt impregnated due to unreasonable structure of the melt impregnation equipment, thereby leading to broken yarn phenomenon, affecting product quality. INVENTION CONTENTS

[0004] The purpose of the present application is to provide a kind of melt impregnation equipment, to ensure that continuous fiber belt impregnation effect is balanced, and avoid the appearance of broken yarn phenomenon.

[0005] The embodiment of the present application provides a kind of melt impregnation equipment, including melt impregnation head, the inside of the melt impregnation head has fiber channel, the fiber channel includes pre-dispersion cavity and melt impregnation cavity that are connected in sequence, further including pre-dispersion component in pre-dispersion cavity and melt impregnation component in melt impregnation cavity, the pre-dispersion component is used to pre-dispersion processing to the continuous fiber that enters into the pre-dispersion cavity, the melt impregnation component includes:

[0006] A plurality of first tension rollers are arranged in the melt impregnation cavity along the first direction, the outer periphery of the first tension roller is connected with the first elastic member, and one end of the first elastic member away from the first tension roller is connected with the upper inner wall of the melt impregnation cavity;

[0007] A plurality of second tension rollers are arranged in the melt impregnation cavity along the first direction and below the first tension rollers, the projection of the second tension roller on the upper inner wall of the melt impregnation cavity is located between adjacent first tension rollers, and the outer periphery of the second tension roller is connected with the second elastic member, and one end of the second elastic member away from the second tension roller is connected with the lower inner wall of the melt impregnation cavity;

[0008] An ultrasonic wave generating member is installed on the upper inner wall of the melt impregnation cavity.

[0009] In one embodiment, the projection of the second tension roller on the upper surface of the melt impregnation cavity is located at the center between the first tension rollers.

[0010] In one embodiment, the melt impregnation assembly further comprises a first guide roller set located near the inlet end of the melt impregnation cavity, the first guide roller set comprising a first upper guide roller and a first lower guide roller arranged oppositely, the first lower guide roller being directly below the first upper guide roller, and a first through gap being formed between the first lower guide roller and the first upper guide roller for the continuous fiber to pass through.

[0011] In one embodiment, the melt impregnation assembly further comprises a second guide roller set located near the outlet end of the melt impregnation cavity, the second guide roller set comprising a second upper guide roller and a second lower guide roller arranged oppositely, the second lower guide roller being directly below the second upper guide roller, and a second through gap being formed between the second lower guide roller and the second upper guide roller for the continuous fiber to pass through.

[0012] In one embodiment, the pre-dispersion assembly comprises:

[0013] a plurality of first dispersion rollers arranged in the pre-dispersion cavity in the first direction;

[0014] a plurality of second dispersion rollers arranged in the pre-dispersion cavity in the first direction and above the first dispersion rollers, the projection of the second dispersion rollers on the plane where the first dispersion rollers are located being located between the first dispersion rollers.

[0015] a vibration generating member connected to one end of the second dispersion rollers for driving the second dispersion rollers to generate up-and-down vibration with a certain amplitude.

[0016] In one embodiment, the number of the first dispersion rollers is 3-7, and the number of the first tension rollers is 4-8.

[0017] In one embodiment, the upper inner wall of the melt impregnation cavity is provided with a mounting cavity, the mounting end of the ultrasonic wave generating member is embedded into the mounting cavity, and the two side edges of the ultrasonic wave generating member extend outwardly with connecting ears, the connecting ears being used to connect with the surface of the upper inner wall of the melt impregnation cavity.

[0018] In one embodiment, a first partition plate is further provided in the fiber channel to divide the fiber channel into a pre-dispersion cavity and a melt impregnation cavity, and the first partition plate is provided with a first opening for the continuous fiber to pass through.

[0019] In an embodiment, a second partition plate is further included, which is arranged at the discharge end of the fiber channel and defines the melt impregnation cavity with the first partition plate, and the second partition plate is provided with a second opening for the continuous fiber to pass through, which is in the same horizontal line with the first opening.

[0020] In an embodiment, the upper surface of the melt impregnation head is provided with an inlet opening communicated with the melt impregnation cavity.

[0021] The above technical solution provided by the embodiments of the present application has the following beneficial effects compared with the prior art:

[0022] By pre-dispersing the continuous fiber in the pre-dispersion cavity by the pre-dispersion assembly first and then entering the melt impregnation cavity, the continuous fiber passes through the first tension roller and the second tension roller in sequence and passes out of the outlet end of the melt impregnation cavity, so that the resin is coated on the surface of the continuous fiber, and the continuous fiber has better mechanical properties and higher impact resistance. Since the first tension roller is connected in the melt impregnation cavity by the first elastic member, and the second tension roller is connected in the melt impregnation cavity by the second elastic member, when the pulling speed of the continuous fiber is slow, the first elastic member and the second elastic member are subjected to smaller tension, so that the continuous fiber passes through the melt impregnation cavity in a curve, and the resin is better coated on the surface of the continuous fiber, and the impregnation effect is better; when the pulling speed of the continuous fiber is fast, the first elastic member and the second elastic member are subjected to larger tension and are in a stretched state, so that the roller surfaces of the first tension roller and the second tension roller are in the same plane, and the continuous fiber passes through the melt impregnation cavity in a straight line, thereby effectively reducing the generation of broken yarns. In addition, in the process of pulling the continuous fiber to pass through, the first tension roller and the second tension roller are pulled to rotate to drive the surrounding melt to flow, and the ultrasonic waves emitted by the ultrasonic wave generator are further matched, thereby effectively promoting the flow of the melt in the melt impregnation cavity, preventing the resin from carbonizing due to long residence time of the melt, and making the impregnation effect more balanced, which is beneficial to improving the yield and quality of the product. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic view of a melt impregnation equipment of the present application;

[0024] Figure 2 is a connection schematic view of the vibration generator and the second dispersion roller in the melt impregnation equipment of the present application;

[0025] Figure 3 is Figure 1 is an enlarged schematic view of A in

[0026] Reference numerals in the drawings:

[0027] 10, melt impregnation head; 10a, mounting cavity; 10b, feeding port; 21, pre-dispersing channel; 22, melt impregnating channel; 30, melt impregnating assembly; 31, first tension roller; 32, first elastic member; 33, second tension roller; 34, second elastic member; 40, pre-dispersing assembly; 41, first dispersing roller; 42, second dispersing roller; 43, vibration generating member; 50, first guide roller set; 51, first upper guide roller; 52, first lower guide roller; 60, second guide roller set; 61, second upper guide roller; 62, second lower guide roller; 70, ultrasonic wave generating member; 70a, connecting lug; 80, first partition plate; 80a, first opening; 90, second partition plate; 90a, second opening; 100, continuous fiber. DETAILED DESCRIPTION

[0028] In order to have a clearer understanding of the technical features, objectives and effects of the present application, the specific embodiments of the present application will be described in detail with reference to the drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like are based on the directions or positional relationships shown in the drawings, constructed and operated in a particular direction, and are only for the convenience of describing the technical solutions, and cannot be understood as indicating that the devices or elements indicated must have a particular direction, therefore, it cannot be understood as a limitation on the present application.

[0029] The specific embodiments of the present application will be further described in detail below in combination with the drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0030] Please refer to Figure 1The application provides a melt impregnation equipment, which comprises a melt impregnation head 10, the inside of the melt impregnation head 10 has a fiber channel, and the fiber channel comprises a pre-dispersion cavity 21 and a melt impregnation cavity 22 connected in sequence. The pre-dispersion cavity 21 is a cavity for allowing continuous fibers 100 (for example, long fiber glass) to pass in and perform pre-dispersion treatment, so that the continuous fibers 100 are pre-dispersed in the pre-dispersion cavity 21 before impregnation, so as to achieve the purpose of dispersion with a smaller tension value, thereby effectively reducing the problem of broken yarn caused by excessive tension of the continuous fibers 100. The melt impregnation cavity 22 is used for allowing the continuous fibers 100 to pass in and performing double-sided impregnation treatment under the action of the melt inside the melt impregnation cavity 22, so as to realize that the continuous fibers 100 are coated with resin on the surface, and have better mechanical properties and higher impact resistance. That is, the continuous fibers 100 are first pre-dispersed in the pre-dispersion cavity 21, and then impregnated in the melt impregnation cavity 22.

[0031] Specifically, in order to realize pre-dispersion and impregnation treatment of the continuous fibers 100 entering the pre-dispersion cavity 21 and the melt impregnation cavity 22 respectively, the melt impregnation equipment further comprises a pre-dispersion assembly 40 arranged in the pre-dispersion cavity 21 and a melt impregnation assembly 30 arranged in the melt impregnation cavity 22. The pre-dispersion assembly 40 is used for pre-dispersion treatment of the continuous fibers 100 entering the pre-dispersion cavity 21, and the melt impregnation assembly 30 is used for impregnation treatment of the continuous fibers 100 entering the melt impregnation cavity 22. The melt impregnation assembly 30 comprises a plurality of first tension rollers 31, a plurality of second tension rollers 33 and an ultrasonic wave generating piece 70. The plurality of first tension rollers 31 are arranged in the melt impregnation cavity 22 along a first direction. The first tension rollers 31 are connected with first elastic pieces 32 on the outer periphery. The ends of the first elastic pieces 32 away from the first tension rollers 31 are connected with the upper inner wall of the melt impregnation cavity 22. The plurality of second tension rollers 33 are arranged in the melt impregnation cavity 22 along the first direction and below the first tension rollers 31. The projection of the second tension rollers 33 on the upper inner wall of the melt impregnation cavity 22 is located between adjacent first tension rollers 31. The second tension rollers 33 are connected with second elastic pieces 34 on the outer periphery. The ends of the second elastic pieces 34 away from the second tension rollers 33 are connected with the lower inner wall of the melt impregnation cavity 22. The ultrasonic wave generating piece 70 is installed on the upper inner wall of the melt impregnation cavity 22 and is used for emitting ultrasonic waves to promote the flow of the melt in the melt impregnation cavity 22.

[0032] Here, it should be noted that the above-mentioned "first direction" refers to the passing direction of the continuous fibers 100, which can be specifically referred to the X direction in Figure 1 .

[0033] Exemplarily, the first elastic member 32 and the second elastic member 34 can be selected as springs, so that the first tension roller 31 and the second tension roller 33 are given certain acting force by the elastic deformation of the springs. For example, when the pulling speed of the continuous fiber 100 is slow, the tension of the springs is small, and the acting force on the first tension roller 31 and the second tension roller 33 is small. At this time, the first tension roller 31 and the second tension roller 33 are staggered in up and down directions, and the continuous fiber 100 passes through the melt impregnation cavity 22 in a curved manner, so that the resin can be better coated on the surface of the continuous fiber 100, and the impregnation effect is better. When the pulling speed of the continuous fiber 100 is fast, the tension of the first elastic member 32 and the second elastic member 34 is large, and the first elastic member 32 and the second elastic member 34 are in a stretched state, so that the roller surfaces of the first tension roller 31 and the second tension roller 33 are in a horizontal state, and the continuous fiber 100 passes through the melt impregnation cavity 22 in a straight line, so that the generation of broken yarns can be effectively reduced.

[0034] In the present application, the continuous fiber 100 is first subjected to pre-dispersion treatment by the pre-dispersion assembly 40 in the pre-dispersion cavity 21, and then enters the melt impregnation cavity 22. At this time, the continuous fiber 100 passes through the first tension roller 31 and the second tension roller 33 in sequence, and passes out from the outlet end of the melt impregnation cavity 22, so that the resin is coated on the surface of the continuous fiber 100, and the continuous fiber 100 has better mechanical properties and higher impact resistance. Since the first tension roller 31 is connected to the melt impregnation cavity 22 through the first elastic member 32, and the second tension roller 33 is connected to the melt impregnation cavity 22 through the second elastic member 34, when the pulling speed of the continuous fiber 100 is slow, the tension of the first elastic member 32 and the second elastic member 34 is small, the continuous fiber 100 passes through the melt impregnation cavity 22 in a curved manner, so that the resin can be better coated on the surface of the continuous fiber 100, and the impregnation effect is better. When the pulling speed of the continuous fiber 100 is fast, the tension of the first elastic member 32 and the second elastic member 34 is large, and the first elastic member 32 and the second elastic member 34 are in a stretched state, so that the roller surfaces of the first tension roller 31 and the second tension roller 33 are in a horizontal state, and the continuous fiber 100 passes through the melt impregnation cavity 22 in a straight line, so that the generation of broken yarns can be effectively reduced. In addition, during the pulling of the continuous fiber 100, the first tension roller 31 and the second tension roller 33 are pulled to rotate, so as to drive the surrounding melt to flow, and cooperate with the ultrasonic waves emitted by the ultrasonic wave generator 70, so as to effectively promote the flow of the melt in the melt impregnation cavity 22, prevent the resin from carbonizing due to long residence time of the melt, and make the impregnation effect more balanced, which is beneficial to improve the yield and quality of the product.

[0035] In addition, the first tension roller 31 and the second tension roller 33 rotate due to the pulling of the continuous fiber 100, and the outer periphery of the first tension roller 31 is connected to one end of the first elastic member 32, and the outer periphery of the second tension roller 33 is connected to one end of the second elastic member 34. Therefore, in order to realize the rotation of the first tension roller 31 and the second tension roller 33, in the embodiment, a bracket (not shown) can be used for auxiliary connection. Taking the connection between the first tension roller 31 and the first elastic member 32 as an example, the bracket is fixed to one end of the first elastic member 32 close to the first tension roller 31, and the first tension roller 31 is rotatably connected to the bracket, so that when the first tension roller 31 is pulled to rotate, the first elastic member 32 can be prevented from being wound on the first tension roller 31. The above is only an example and is not limited thereto.

[0036] In an embodiment, the projection of the second tension roller 33 on the upper surface of the melt impregnation cavity 22 is located at the center between the adjacent first tension rollers 31. In this way, after the second tension roller 33 acts on the continuous fiber 100, the front and rear sections of the continuous fiber 100 are balanced, and the problem of broken yarn caused by uneven force can be effectively avoided.

[0037] In an embodiment, the melt impregnation assembly 30 further comprises a first guide roller set 50 located close to the feeding end of the melt impregnation cavity 22. The first guide roller set 50 comprises a first upper guide roller 51 and a first lower guide roller 52 arranged oppositely. The first lower guide roller 52 is located directly below the first upper guide roller 51, and a first through gap is formed between the first lower guide roller 52 and the first upper guide roller 51 for the continuous fiber 100 to pass through. That is, when the continuous fiber 100 enters the melt impregnation cavity 22 from the pre-dispersion cavity 21, the continuous fiber 100 passes through the first through gap, so that the continuous fiber 100 can smoothly transition into the melt impregnation cavity 22 under the action of the first upper guide roller 51 and the first lower guide roller 52, so as to accurately pass through the first tension roller 31 and the second tension roller 33 subsequently.

[0038] In an embodiment, the melt impregnation assembly 30 further comprises a second guide roller set 60 located close to the discharging end of the melt impregnation cavity 22. The second guide roller set 60 comprises a second upper guide roller 61 and a second lower guide roller 62 arranged oppositely. The second lower guide roller 62 is located directly below the second upper guide roller 61, and a second through gap is formed between the second lower guide roller 62 and the second upper guide roller 61 for the continuous fiber 100 to pass through. That is, after the impregnation treatment is completed, the continuous fiber 100 passes into the second through gap. Since the second upper guide roller 61 and the second lower guide roller 62 are in contact with the upper surface and the lower surface of the continuous fiber 100 respectively, it can be ensured that the impregnated continuous fiber 100 is discharged from the discharging end of the melt impregnation cavity 22, and the problem of broken yarn during discharging can be avoided.

[0039] Please refer to Figure 1 and Figure 2 In an embodiment, the pre-dispersion assembly 40 comprises a plurality of first dispersion rollers 41, a plurality of second dispersion rollers 42, and a vibration generator 43. The plurality of first dispersion rollers 41 are arranged in the pre-dispersion channel 21 in a first direction. The plurality of second dispersion rollers 42 are arranged in the pre-dispersion channel 21 in the first direction and above the first dispersion rollers 41. The projection of the second dispersion rollers 42 on the plane of the first dispersion rollers 41 is between adjacent first dispersion rollers 41. The vibration generator 43 is connected to one end of the second dispersion rollers 42 and is used to drive the second dispersion rollers 42 to generate up-and-down vibration. That is, after the continuous fibers 100 pass through the pre-dispersion channel 21, the second dispersion rollers 42 are driven by the vibration generator 43 to generate up-and-down vibration, so that a vibration can be provided to the continuous fibers 100 in contact, and the continuous fibers 100 can be dispersed in the pre-dispersion channel 21 with smaller tension, thereby effectively reducing the problem of broken yarn caused by excessive tension of the continuous fibers 100.

[0040] It should be noted that the vibration generator 43 can use a vibrator in the prior art that can generate vibration. The vibration generated by the vibrator is transmitted to the second dispersion rollers 42, and then acts on the continuous fibers 100 in contact with the second dispersion rollers 42.

[0041] In an embodiment, the number of first dispersion rollers 41 is 3-7; the number of first tension rollers 31 is 4-8.

[0042] Please refer to Figure 3 In an embodiment, the upper inner wall of the melt impregnation channel 22 is provided with a mounting cavity 10a, the mounting end of the ultrasonic wave generator 70 is embedded into the mounting cavity 10a, and the two sides of the ultrasonic wave generator 70 extend outwardly with connecting ears 70a, which are used to be connected to the surface of the upper inner wall of the melt impregnation channel 22.

[0043] In an embodiment, a first partition plate 80 is arranged in the fiber channel to divide the fiber channel into the pre-dispersion channel 21 and the melt impregnation channel 22, and the first partition plate 80 is provided with a first opening 80a for the continuous fibers 100 to pass through. In this way, the fiber channel can be divided into the pre-dispersion channel 21 and the melt impregnation channel 22 by the first partition plate 80. Due to the first opening 80a on the first partition plate 80, the pre-dispersion channel 21 and the melt impregnation channel 22 are in communication with each other, so that the continuous fibers 100 can enter the melt impregnation channel 22 for impregnation treatment after pre-dispersion treatment.

[0044] In an embodiment, a second partition 90 is further included, which is arranged at the discharge end of the fiber channel and defines the melt impregnation cavity 22 together with the first partition 80, and the second partition 90 is provided with a second opening 90a for the continuous fiber 100 to pass through, and the second opening 90a is in the same horizontal line with the first opening 80a. In this way, it can be ensured that the melt impregnation cavity 22 is in a closed state, so as to avoid the melt in the melt impregnation cavity 22 from flowing out, and also prevent external impurities from entering and affecting the impregnation quality.

[0045] In an embodiment, the upper surface of the melt impregnation head is provided with a feeding port 10b which is in communication with the melt impregnation cavity 22. The feeding port 10b can be in the shape of a trumpet or an inverted cone, so that the melt can be more conveniently fed into the melt impregnation cavity 22.

[0046] The above description is only the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and replacements can be made, and these improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. A melt impregnation apparatus comprising a melt impregnation head, the interior of the melt impregnation head having a fiber passage, the fiber passage comprising a predispersion chamber and a melt impregnation chamber connected in series, characterized in that, The pre-dispersion assembly is arranged in the pre-dispersion channel and used for pre-dispersing the continuous fibers entering into the pre-dispersion channel. The first tension rollers are arranged in the melt impregnation channel along the first direction, and the outer periphery of the first tension rollers is connected with the first elastic members, and the end of the first elastic members away from the first tension rollers is connected with the upper inner wall of the melt impregnation channel. The second tension rollers are arranged in the melt impregnation channel along the first direction and below the first tension rollers, and the projection of the second tension rollers on the upper surface of the melt impregnation channel is between the adjacent first tension rollers, and the outer periphery of the second tension rollers is connected with the second elastic members, and the end of the second elastic members away from the second tension rollers is connected with the lower inner wall of the melt impregnation channel. The ultrasonic wave generating member is arranged on the upper inner wall of the melt impregnation channel.

2. The melt impregnation apparatus according to claim 1, wherein The projection of the second tension rollers on the upper surface of the melt impregnation channel is in the center between the adjacent first tension rollers.

3. The melt impregnation apparatus of claim 1, wherein, The melt impregnation assembly further comprises a first guide roller set arranged near the feeding end of the melt impregnation channel, and the first guide roller set comprises oppositely arranged first upper and lower guide rollers, and the first lower guide roller is directly below the first upper guide roller, and a first through gap for the continuous fibers is formed between the first upper and lower guide rollers.

4. The melt impregnation apparatus of claim 3, wherein The melt impregnation assembly further comprises a second guide roller set arranged near the discharging end of the melt impregnation channel, and the second guide roller set comprises oppositely arranged second upper and lower guide rollers, and the second lower guide roller is directly below the second upper guide roller, and a second through gap for the continuous fibers is formed between the second upper and lower guide rollers.

5. The fusion impregnation apparatus according to claim 1, wherein The pre-dispersion assembly comprises: The first dispersion rollers are arranged in the pre-dispersion channel along the first direction. The second dispersion rollers are arranged in the pre-dispersion channel along the first direction and above the first dispersion rollers, and the projection of the second dispersion rollers on the plane where the first dispersion rollers are arranged is between the adjacent first dispersion rollers. The vibration generating member is connected with one end of the second dispersion rollers and used for driving the second dispersion rollers to generate up-down vibration with a vibration amplitude.

6. The fusion impregnation apparatus according to claim 5, wherein The number of the first dispersion rollers is 3-7, and the number of the first tension rollers is 4-8.

7. The fusion impregnation apparatus according to claim 1, wherein The upper inner wall of the melt impregnation channel is provided with a mounting cavity, the mounting end of the ultrasonic wave generating member is embedded into the mounting cavity, and the two side edges of the ultrasonic wave generating member extend outwardly with connecting ears, and the connecting ears are used for being connected with the surface of the upper inner wall of the melt impregnation channel.

8. The fusion impregnation apparatus according to claim 1, wherein The first partition plate is arranged in the fiber channel and divides the fiber channel into the pre-dispersion channel and the melt impregnation channel, and the first partition plate is provided with the first opening for the continuous fibers to pass through.

9. The melt impregnation apparatus of claim 8, wherein, The second partition plate is arranged at the discharge end of the fiber channel and defines the melt impregnation cavity with the first partition plate, and the second partition plate is provided with a second opening for the continuous fiber to pass through, and the second opening is in the same horizontal line with the first opening.

10. The fusion impregnation apparatus according to claim 1, wherein The upper surface of the melt impregnation head is provided with an inlet opening in communication with the melt impregnation cavity.

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