A thermoplastic fiber-reinforced composite material rib winding type rib forming device

Abstract

The present invention provides a winding type rib forming device for a thermoplastic fiber reinforced composite material rib, which includes a disc base, a thermoplastic prepreg tape placing roller, a thermoplastic prepreg tape winding ring, a tension regulator and a thermoplastic prepreg tape heating module. The tail end of the thermoplastic prepreg tape placing roller is rotationally connected to the circular plane of the disc base through a bearing pair and can rotate around its own central axis. The thermoplastic prepreg tape winding ring is sleeved on the prepreg tape placing roller and connected by a key, so that the thermoplastic prepreg tape winding ring can move axially along the side wall surface of the thermoplastic prepreg tape placing roller. The thermoplastic prepreg tape heating module is located between the thermoplastic prepreg tape placing roller and the through hole of the composite rod. The thermoplastic prepreg tape is wound on the thermoplastic prepreg tape winding ring; the thermoplastic prepreg tape is passed through a rotating heating plate and wound on the composite rod; this forming device can process the rib of the thermoplastic fiber reinforced composite material rib in the continuous production process; it has the advantages of high production efficiency and low cost.

Description

Technical Field

[0001] The present invention belongs to the field of civil engineering, and particularly relates to a winding rib forming device for thermoplastic fiber reinforced composite bars. Background Art

[0002] Continuous fiber reinforced resin matrix composite bars have characteristics such as light weight, high strength, and corrosion resistance. Replacing steel bars for marine engineering construction can effectively solve the corrosion problem, and can greatly improve the service performance and service life of marine engineering structures, with significant economic benefits. Compared with thermosetting resin matrix composite bars, thermoplastic resin matrix composite bars have advantages such as multiple repeatable molding, high toughness, and good durability, and better meet the application requirements of marine engineering. At present, the rib forming process of thermosetting composite bars is relatively mature, including winding process, extrusion process, cutting process, etc. However, due to the characteristics of rapid curing after thermoplastic resin pultrusion molding, the rib forming method matching thermosetting composite bars is not applicable to thermoplastic composite bars. Therefore, there is an urgent need to propose a rib forming device for thermoplastic fiber reinforced composite bars with high production efficiency, low cost, simple operation, and wide application range. Summary of the Invention

[0003] Based on the above deficiencies, the present invention proposes a winding rib forming device for thermoplastic fiber reinforced composite bars to solve the problem that ribs cannot be processed in the continuous preparation process of thermoplastic fiber reinforced composite bars.

[0004] To achieve the above object, the technical solution of the present invention is realized as follows: A winding rib forming device for thermoplastic fiber reinforced composite bars includes a disc base, a thermoplastic prepreg placing roller, a thermoplastic prepreg winding ring, a tension regulator, and a thermoplastic prepreg heating module. The disc base is driven by a motor to realize the rotation of the disc base. A through hole for the composite rod to pass through is opened at the center of the circular plane of the disc base. The tail end of the thermoplastic prepreg placing roller is rotationally connected to the circular plane of the disc base through a bearing pair and can rotate around its own central axis. The thermoplastic prepreg winding ring is sleeved on the prepreg placing roller and is connected by a key, so that the thermoplastic prepreg winding ring can move axially along the side wall surface of the thermoplastic prepreg placing roller, and the thermoplastic prepreg is wound on the thermoplastic prepreg winding ring.

[0005] The described tension regulator includes a belt fixing post, a belt, a spring, a spring fixing bolt, a tension adjusting nut, and a spring holder. The fixing post is fixedly connected to the circular plane of the disc base and is located on one side of the thermoplastic prepreg placement roller. The spring holder is fixedly connected to the circular plane of the disc base and is located on the other side of the thermoplastic prepreg placement roller. One end of the belt is connected to the fixing post, and the other end of the belt bypasses the side wall of the tail end of the thermoplastic prepreg placement roller and is connected to one end of the spring. The other end of the spring is fixedly connected through the spring fixing bolt, and the spring fixing bolt is connected to the spring holder through the tension adjusting nut;

[0006] The described thermoplastic prepreg heating module includes a slideway, a slide bar, a sliding support, and a rotary heating plate. The slideway is fixedly connected to the circular plane of the disc base and is located between the through hole and the thermoplastic prepreg placement roller. The slideway is perpendicular to the horizontal plane. The slide bar is parallel to the thermoplastic prepreg placement roller. The end of the slide bar is located inside the slideway and is adjusted and fixed in position through a fixing bolt. The sliding support is sleeved on the slide bar and is adjusted and fixed in position through a fixing bolt. The rotary heating plate is rotationally connected to the sliding support through a bearing pair,

[0007] Heating rods and temperature sensors are arranged inside the described rotary heating plate. The heating rods and temperature sensors are connected to a temperature control system. The temperature of the heating rods should be 5 - 10 °C higher than the melting temperature of the thermoplastic resin; A frustum-shaped hole is opened on the rotary heating plate, and a rib preform wedge is embedded in the frustum-shaped hole. A rib preform hole is opened on the rib preform wedge.

[0008] Further, there are two groups of the described thermoplastic prepreg heating modules and they are parallel to each other.

[0009] Further, according to different rib width requirements, rib preform wedges with different hole sizes are replaced.

[0010] Another object of the present invention is to provide a preparation method of a thermoplastic fiber reinforced composite material rib obtained by the rib winding type rib forming device as described above, including the following steps:

[0011] Step 1: Wind the cut thermoplastic prepreg on the thermoplastic prepreg winding ring, and place the thermoplastic prepreg winding ring on the thermoplastic prepreg placement roller;

[0012] Step 2: Arrange a roller type tractor in front of the rib winding type rib forming device. Under the action of the crawler type tractor, the thermoplastic fiber reinforced composite material rods continuously prepared in other processes are sequentially passed through the roller type tractor, the rib winding type rib forming device, the oven, and the cutting device;

[0013] Step 3: Turn on the temperature control system and adjust the temperature of the heating rod to be 5 - 10 °C higher than the melting temperature of the thermoplastic resin. After the temperature stabilizes, pass the thermoplastic prepreg tape through the rotating heating plate and wind it around the thermoplastic fiber reinforced composite rod;

[0014] Step 4: Adjust the spatial positions of the sliding rod, sliding support, and rotating heating plate so that the thermoplastic string preformed from the thermoplastic prepreg tape should always remain in a straight state. Adjust the tension adjusting nut so that the tension acting on the thermoplastic prepreg tape just makes the thermoplastic string contact the thermoplastic fiber reinforced composite rod; Adjust the rotational speed of the disc base to achieve the winding of the thermoplastic string on the thermoplastic fiber reinforced composite rod;

[0015] Step 5: Under the action of the crawler tractor, pass the thermoplastic fiber reinforced composite rod wound with the thermoplastic string through the oven and cutting device in sequence to prepare the thermoplastic fiber reinforced composite rib.

[0016] Furthermore, there is a certain speed difference between the roller tractor and the crawler tractor, so that there is a certain tension in the axial direction of the thermoplastic fiber reinforced composite rod, preventing the phenomenon of the thermoplastic fiber reinforced composite rod swinging during the winding process.

[0017] Furthermore, the thermoplastic resin matrix of the thermoplastic fiber reinforced composite rib is nylon 6, nylon 12, polypropylene, polymethyl methacrylate or polyethylene, and the reinforcing fiber is continuous carbon fiber or continuous glass fiber.

[0018] Compared with the prior art, the beneficial effects and advantages of the present invention are as follows: This forming device can process the ribs in the continuous production process of the thermoplastic fiber reinforced composite rib; The rib size of the thermoplastic composite rib prepared by this forming device has good stability, and the rib height, rib spacing, and rib width of the rib are stable and controllable during production; This device has the advantages of simple and easy operation, strong applicability, high production efficiency, and low cost. Description of the Drawings

[0019] Figure 1 It is an axonometric view of a winding rib forming device for a thermoplastic fiber reinforced composite rib according to an embodiment of the present invention;

[0020] Figure 2 It is a front view of a winding rib forming device for a thermoplastic fiber reinforced composite rib according to an embodiment of the present invention;

[0021] Figure 3 It is a side view of a winding rib forming device for a thermoplastic fiber reinforced composite rib according to an embodiment of the present invention;

[0022] Figure 4The top view of a winding type rib forming device for a thermoplastic fiber reinforced composite material rib according to an embodiment of the present invention;

[0023] Figure 5 The axonometric view of a sliding support and a rotating heating plate of a winding type rib forming device for a thermoplastic fiber reinforced composite material rib according to an embodiment of the present invention;

[0024] Figure 6 The front view of a sliding support and a rotating heating plate of a winding type rib forming device for a thermoplastic fiber reinforced composite material rib according to an embodiment of the present invention;

[0025] Figure 7 The side view of a sliding support and a rotating heating plate of a winding type rib forming device for a thermoplastic fiber reinforced composite material rib according to an embodiment of the present invention;

[0026] Figure 8 The top view of a sliding support and a rotating heating plate of a winding type rib forming device for a thermoplastic fiber reinforced composite material rib according to an embodiment of the present invention;

[0027] Wherein, 1, disc base; 2, thermoplastic fiber reinforced composite rod; 3, thermoplastic prepreg placing roller; 4, thermoplastic prepreg winding ring; 5, belt fixing column; 6, belt; 7, spring; 8, spring fixing bolt; 9, tension adjusting nut; 10, spring fixer; 11, slideway; 12, slide bar; 13, sliding support; 14, rotating heating plate; 15, rib preforming wedge; 16, heating rod; 17, temperature sensor; 18, thermoplastic prepreg. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0029] Embodiment 1:

[0030] As Figures 1 to 8As shown in the figure, a winding type rib forming device for thermoplastic fiber reinforced composite ribs includes a disc base 1, a thermoplastic prepreg placing roller 3, a thermoplastic prepreg winding ring 4, a tension regulator and a thermoplastic prepreg heating module. The disc base 1 is connected to a motor through gears to realize the rotation of the disc base 1. A through hole for the composite rod to pass through is opened at the center of the circular plane of the disc base 1. The tail end of the thermoplastic prepreg placing roller 3 is rotationally connected to the circular plane of the disc base 1 through a bearing pair and can rotate around its own central axis. The thermoplastic prepreg winding ring 4 is sleeved on the thermoplastic prepreg placing roller 3 and is connected by a key, so that the thermoplastic prepreg winding ring 4 can move axially along the side wall surface of the thermoplastic prepreg placing roller 3.

[0031] The tension regulator includes a belt fixing column 5, a belt 6, a spring 7, a spring fixing bolt 8, a tension adjusting nut 9 and a spring fixer 10. The fixing column 5 is fixedly connected to the circular plane of the disc base 1 and is located on one side of the thermoplastic prepreg placing roller 3. The spring fixer 10 is fixedly connected to the circular plane of the disc base 1 and is located on the other side of the thermoplastic prepreg placing roller 3. One end of the belt 6 is connected to the fixing column 5, the other end of the belt 6 bypasses the side wall of the tail end of the thermoplastic prepreg placing roller 3 and is connected to one end of the spring 7. The other end of the spring 7 is fixedly connected through the spring fixing bolt 8. The spring fixing bolt 8 is connected to the spring fixer 10 through the tension adjusting nut 9. By rotating the tension adjusting nut 9, the friction between the belt 6 and the thermoplastic prepreg placing roller 3 is increased or decreased to realize the adjustment of the tension on the thermoplastic prepreg 18.

[0032] As Figures 1-2 shown in the figure, the thermoplastic prepreg heating module includes a slideway 11, a slide bar 12, a sliding support 13 and a rotary heating plate 14. The slideway 11 is fixedly connected to the circular plane of the disc base 1 and is located between the through hole and the thermoplastic prepreg placing roller 3. The slideway 11 is perpendicular to the horizontal plane. The slide bar 12 is parallel to the thermoplastic prepreg placing roller 3. The end of the slide bar 12 is located inside the slideway 11 and its fixed position is adjusted through a fixing bolt. The sliding support 13 is sleeved on the slide bar 12 and its fixed position is adjusted through a fixing bolt. As Figures 5-6 shown in the figure, the rotary heating plate 14 is rotationally connected to the sliding support 13 through a bearing pair.

[0033] As Figures 1-2 shown in the figure, the thermoplastic prepreg heating module is in two groups and is parallel to each other.

[0034] As Figures 5-8As shown in the figure, two heating rods 16 and a temperature sensor 17 are arranged inside the rotating heating plate 14. The heating rods 16 and the temperature sensor 17 are connected to the temperature control system. The temperature of the heating rods 16 should be 5-10°C higher than the melting temperature of the thermoplastic resin. A frustum-shaped hole is opened on the rotating heating plate 14, and a rib preforming wedge 15 is embedded in the frustum-shaped hole. A rib preforming hole is opened on the rib preforming wedge 15. According to different requirements for the rib width, the rib preforming wedge 15 with different hole sizes is replaced.

[0035] Adjust the spatial positions of the two groups of slide rods 12 and the two groups of rotating heating plates 14 so that when winding the ribs, the thermoplastic string preformed by the thermoplastic prepreg 18 should always be in a straight state.

[0036] The wires of the heating rods 16 and the temperature sensor 17 should be connected to the conductive slip ring to prevent wire entanglement during the rotation of the disc base.

[0037] Embodiment 2

[0038] This embodiment provides a preparation method for preparing thermoplastic fiber-reinforced composite material ribs by using the forming device of Embodiment 1, which specifically includes the following steps:

[0039] Step 1: Wind the cut thermoplastic prepreg 18 on the thermoplastic prepreg winding ring 4, and place the thermoplastic prepreg winding ring 4 on the thermoplastic prepreg placing roller 3.

[0040] Step 2: Arrange a roller-type tractor in front of the rib forming device. Under the action of the caterpillar tractor, the thermoplastic fiber-reinforced composite material rod 2 continuously prepared in other processes is sequentially passed through the roller-type tractor, the rib winding-type rib forming device, the oven and the cutting device.

[0041] Step 3: Turn on the temperature control system of the rotating heating plate 14, and adjust the temperature of the heating rods 16 to be 5-10°C higher than the melting temperature of the thermoplastic resin. After the temperature is stable, pass the thermoplastic prepreg 18 through the rotating heating plate 14 and wind it on the thermoplastic fiber-reinforced composite material rod 2.

[0042] Step 4: Adjust the spatial positions of the slide rod 12, the sliding support 13 and the rotating heating plate 14 so that the thermoplastic string preformed by the thermoplastic prepreg 18 should always be in a straight line state. Adjust the tension adjusting nut 9 so that the tension acting on the thermoplastic prepreg 18 just makes the thermoplastic string contact the thermoplastic fiber-reinforced composite material rod 2. Start the transmission system and adjust the rotation speed of the disc base 1 to realize the winding of the thermoplastic string on the thermoplastic fiber-reinforced composite material rod 2.

[0043] Step 5: Under the action of the crawler traction machine, the thermoplastic fiber reinforced composite material rod 2 wrapped with the thermoplastic string is passed through an oven and a cutting device in sequence to prepare a thermoplastic fiber reinforced composite material rib.

[0044] The thermoplastic resin matrix of the thermoplastic fiber reinforced composite material rib is a thermoplastic resin such as nylon 6, nylon 12, polypropylene, polymethyl methacrylate, polyethylene, etc., and the reinforcing fiber is a continuous carbon fiber or a continuous glass fiber.

[0045] There is a certain speed difference between the roller tractor and the crawler tractor, so that there is a certain tension in the axial direction of the thermoplastic fiber reinforced composite material rod 2, thereby preventing the thermoplastic fiber reinforced composite material rod 2 from swinging during the winding process.

[0046] Example 3

[0047] The present embodiment provides a forming device for continuous carbon fiber reinforced PA6 composite ribs. The present forming device has the same structure as that of the embodiment 1. The disc base 1 is connected to the motor through gears to realize the rotation of the disc base 1. The thermoplastic prepreg tape placement roller 3 can rotate freely around its inner axis, and convex keys are arranged parallel to the outer wall surface along the central axis. The thermoplastic prepreg tape winding ring 4 is provided with baffles on both sides to prevent the thermoplastic prepreg tape 18 from escaping. The thermoplastic prepreg tape winding ring 4 is sleeved on the thermoplastic prepreg tape placement roller 3 and can move along its axial direction on the side wall surface of the thermoplastic prepreg tape placement roller 3. The thermoplastic prepreg tape is wound on the thermoplastic prepreg tape winding ring 4. The friction between the belt 6 and the thermoplastic prepreg tape placement roller 3 is increased or decreased by rotating the tension adjustment nut 9 to adjust the tension on the thermoplastic prepreg tape. By loosening and tightening the fixing bolts, the sliding rod 12 can be moved up and down and the sliding support 13 can be moved forward and backward. The cylindrical protrusion on the top of the sliding support 13 and the cylindrical groove on the bottom of the rotating heating plate 14 are connected by a bearing to realize the rotation of the rotating heating plate 14. The thermoplastic prepreg tape 18 is a continuous carbon fiber reinforced PA6 prepreg tape. The temperature of the heating rod 16 is set to 230°C. The diameter of the rib preforming hole of the rib preforming wedge 15 is 1mm.

[0048] At the same time, a method for preparing carbon fiber reinforced PA6 composite ribs is provided, comprising the following steps:

[0049] Step 1, winding the cut continuous carbon fiber reinforced PA6 prepreg tape 18 on the thermoplastic prepreg tape winding ring 4, and placing the thermoplastic prepreg tape winding ring 4 on the thermoplastic prepreg tape placing roller 3;

[0050] Step 2, a roller traction machine is arranged in front of the rib forming device, and the continuous carbon fiber reinforced PA6 composite rod continuously prepared in other processes is passed through the roller traction machine, the rib winding rib forming device, the oven and the cutting device in sequence under the action of the crawler traction machine;

[0051] Step 3: Turn on the temperature control system of the rotary heating plate 14 and adjust the temperature of the heating rod 16 to 230 °C. After the temperature stabilizes, pass the continuous carbon fiber reinforced PA6 prepreg tape 18 through the rotary heating plate 14 and wind it around the continuous carbon fiber reinforced PA6 composite rod.

[0052] Step 4: Adjust the spatial positions of the sliding rod 12, the sliding support 13, and the rotary heating plate 14 so that the thermoplastic string preformed by the continuous carbon fiber reinforced PA6 prepreg tape 18 should always remain in a straight state. Adjust the tension adjusting nut 9 so that the tension acting on the continuous carbon fiber reinforced PA6 prepreg tape 18 just makes the thermoplastic string contact the continuous carbon fiber reinforced PA6 composite rod. Start the drive system and adjust the rotation speed of the disk base 1 to realize the winding of the thermoplastic string on the continuous carbon fiber reinforced PA6 composite rod.

[0053] Step 5: Under the action of the crawler tractor, pass the continuous carbon fiber reinforced PA6 composite rod wound with the thermoplastic string through the oven and the cutting device in sequence to prepare the continuous carbon fiber reinforced PA6 composite rib.

Claims

1. A winding type rib forming device for thermoplastic fiber reinforced composite bars, comprising a disc base, a thermoplastic prepreg placing roller, a thermoplastic prepreg winding ring, a tension regulator and a thermoplastic prepreg heating module. The disc base is driven by a motor to realize the rotation of the disc base. A through hole for the passage of the composite bar is opened at the center of the circular plane of the disc base. It is characterized in that: The tail end of the thermoplastic prepreg placing roller is rotationally connected to the circular plane of the disc base through a bearing pair and can rotate around its own central axis. The thermoplastic prepreg winding ring is sleeved on the prepreg placing roller and connected by a key, so that the thermoplastic prepreg winding ring can move axially along the side wall surface of the thermoplastic prepreg placing roller, and the thermoplastic prepreg is wound on the thermoplastic prepreg winding ring; The tension regulator includes a belt fixing column, a belt, a spring, a spring fixing bolt, a tension adjusting nut and a spring fixer. The fixing column is fixedly connected to the circular plane of the disc base and is located on one side of the thermoplastic prepreg placing roller. The spring fixer is fixedly connected to the circular plane of the disc base and is located on the other side of the thermoplastic prepreg placing roller. One end of the belt is connected to the fixing column, and the other end of the belt bypasses the side wall of the tail end of the thermoplastic prepreg placing roller and is connected to one end of the spring. The other end of the spring is fixedly connected through a spring fixing bolt, and the spring fixing bolt is connected to the spring fixer through a tension adjusting nut; The thermoplastic prepreg heating module includes a slideway, a slide bar, a sliding support and a rotary heating plate. The slideway is fixedly connected to the circular plane of the disc base and is located between the through hole and the thermoplastic prepreg placing roller. The slideway is perpendicular to the horizontal plane. The slide bar is parallel to the thermoplastic prepreg placing roller. The end of the slide bar is located inside the slideway and its fixed position is adjusted through a fixing bolt. The sliding support is sleeved on the slide bar and its fixed position is adjusted through a fixing bolt. The rotary heating plate is rotationally connected to the sliding support through a bearing pair, Heating rods and temperature sensors are arranged inside the rotary heating plate. The heating rods and temperature sensors are connected to a temperature control system. The temperature of the heating rods should be 5-10°C higher than the melting temperature of the thermoplastic resin. A frustum-shaped hole is opened on the rotary heating plate, and a rib preforming wedge block is embedded in the frustum-shaped hole. A rib preforming hole is opened on the rib preforming wedge block.

2. The winding type rib forming device for the thermoplastic fiber reinforced composite material rib according to claim 1, wherein: There are two groups of the thermoplastic prepreg heating modules and they are parallel to each other.

3. A winding type rib forming device for a thermoplastic fiber reinforced composite material rib according to claim 1 or 2, characterized in that: According to different rib width requirements, rib preforming wedge blocks with different hole sizes are replaced.

4. A method for preparing a thermoplastic fiber-reinforced composite rib obtained from the rib winding type rib forming device according to claim 3, characterized in that It includes the following steps: Step 1: Wind the cut thermoplastic prepreg on the thermoplastic prepreg winding ring, and place the thermoplastic prepreg winding ring on the thermoplastic prepreg placing roller; Step 2: Arrange a roller type tractor in front of the rib winding type rib forming device. Under the action of the crawler type tractor, the thermoplastic fiber reinforced composite bars continuously prepared in other processes are sequentially passed through the roller type tractor, the rib winding type rib forming device, the oven and the cutting device; Step 3: Turn on the temperature control system and adjust the temperature of the heating rod to be 5 - 10°C higher than the melting temperature of the thermoplastic resin. After the temperature stabilizes, pass the thermoplastic prepreg tape through the rotating heating plate and wind it around the thermoplastic fiber-reinforced composite rod. Step 4: Adjust the spatial positions of the sliding rod, sliding support, and rotating heating plate so that the thermoplastic string preformed from the thermoplastic prepreg tape should always remain in a straight state. Adjust the tension adjustment nut so that the tension acting on the thermoplastic prepreg tape just makes the thermoplastic string contact the thermoplastic fiber-reinforced composite rod. Adjust the rotation speed of the disc base to achieve the winding of the thermoplastic string on the thermoplastic fiber-reinforced composite rod. Step 5: Under the action of the caterpillar tractor, pass the thermoplastic fiber-reinforced composite rod wound with the thermoplastic string through the oven and cutting device in sequence to prepare the thermoplastic fiber-reinforced composite rib.

5. The preparation method of a thermoplastic fiber-reinforced composite material rib according to claim 4, characterized in that: There is a certain speed difference between the roller tractor and the caterpillar tractor, resulting in a certain axial tension on the thermoplastic fiber-reinforced composite rod to prevent the thermoplastic fiber-reinforced composite rod from swinging during the winding process.

6. The preparation method of a thermoplastic fiber reinforced composite material rib according to claim 4 or 5, characterized in that, The thermoplastic resin matrix of the thermoplastic fiber-reinforced composite rib is nylon 6, nylon 12, polypropylene, polymethyl methacrylate, or polyethylene, and the reinforcing fiber is continuous carbon fiber or continuous glass fiber.

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