Extrusion molding device for producing glass fiber composite material and use method

Abstract

This invention relates to the field of composite material extrusion molding equipment, specifically to an extrusion molding device and method for producing glass fiber composite materials. The device includes a molding support, on the left side of the top of which a screw extruder is fixedly mounted. A cooling water tank, which mates with the discharge end of the screw extruder, is mounted on the top of the molding support. This extrusion molding device for producing glass fiber composite materials, through the coordinated use of components such as an X-shaped connecting rod, pressure rollers, and guide plates, allows the pressure rollers to overcome the spring force of the spring extension rod and float upwards when the composite pipe experiences increased local buoyancy due to process fluctuations. This avoids surface indentations or structural damage to the pipe that may be caused by rigid pressing. Furthermore, through the transmission of the floating guide mechanism, the guide plate is driven to move synchronously upwards to near the bottom of the floating pipe. The water inlet and overflow holes on the guide plate precisely guide the coolant and flush away the previously formed stagnant water layer, preventing uneven cooling caused by the floating pipe.

Description

Technical Field

[0001] This invention relates to the field of composite material extrusion molding equipment, specifically to an extrusion molding equipment and method for producing glass fiber composite materials. Background Technology

[0002] Glass fiber composites are widely used in pipes, profiles and other fields due to their excellent properties such as light weight, high strength, corrosion resistance and high designability. Extrusion molding is a key process for the continuous production of such composite pipes. In this process, after the molten material is extruded through the die of the screw extruder, it must immediately enter the cooling water tank for cooling and shaping to fix the cross-sectional shape and ensure the material properties.

[0003] During the cooling and shaping process of existing composite pipes, factors such as density differences between the resin matrix and glass fiber in the composite material, fluctuations in extrusion rate, or uneven cooling shrinkage can cause the pipes to float locally or entirely under the buoyancy of cooling water. To suppress floating and ensure the straightness of the pipes, spring-loaded or counterweight-loaded pressure rollers are commonly used to restrain them below the liquid surface. However, this rigid or constant-pressure restraint method has obvious drawbacks: 1. When the local buoyancy of the pipe increases instantaneously, the constant downward pressure of the pressure roller may cause indentations or even structural damage to the pipe surface at that point, affecting the product's appearance and mechanical properties; 2. Floating of the pipe will increase the gap between its bottom and the bottom of the water tank or the fixed guide plate, causing a sharp decrease in the fluidity of the coolant in this area, easily forming a "stagnant water layer." This makes the heat dissipation efficiency at the bottom of the pipe much lower than that at the top and sides, resulting in uneven cooling, increased residual stress in the cross-section, and consequently, pipe bending, warping, or out-of-tolerance dimensional accuracy. Summary of the Invention

[0004] The purpose of this invention is to provide an extrusion molding apparatus and method for producing glass fiber composite materials, in order to solve the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: an extrusion molding apparatus for producing glass fiber composite materials, comprising a molding support, a screw extruder fixedly mounted on the left side of the top of the molding support, a cooling water tank that cooperates with the discharge end of the screw extruder mounted on the top of the molding support, and pressure rollers symmetrically arranged inside the cooling water tank to restrict the floating of the composite pipe;

[0005] It also includes: a guide plate that is vertically slidably installed on the lower part of the inner wall of the cooling water tank, and a floating guide mechanism that drives the guide plate to move upward is movably connected to the surface of the pressure roller, which is used to guide the coolant to the bottom position of the composite pipe after it floats up;

[0006] The upper part of the guide plate is movably connected to the lower part of the floating guide mechanism by a one-way positioning mechanism, so that the pressure roller drives the guide plate in one direction.

[0007] Preferably, the guide plate has a plurality of water inlet holes arranged in a staggered manner inside, and an overflow hole that cooperates with the water inlet holes is provided through the middle of the guide plate;

[0008] The guide plate has symmetrical positioning grooves on its front and rear sides, and rollers are symmetrically mounted on the inner wall of the positioning grooves. The inner wall of the cooling water tank is vertically fixed with a positioning rod that cooperates with the positioning groove, and the surface of the roller overlaps with the surface of the positioning rod.

[0009] Preferably, the floating guide mechanism includes annular supports symmetrically fixedly connected to both ends of the pressure roller, and a spring telescopic rod is fixedly connected between the top of the annular supports and the inner top surface of the cooling water tank.

[0010] The X-shaped connecting rod is hinged to the inner wall of the cooling water tank and cooperates with the ring bracket. The upper end of the X-shaped connecting rod is hinged to both sides of the ring bracket. The upward movement of the ring bracket drives the hinged X-shaped connecting rod to deform.

[0011] The lower end of the X-shaped link is hinged to the upper part of the guide plate, and the deformed X-shaped link drives the hinged guide plate to move upward.

[0012] Preferably, the upper and lower parts of the X-shaped connecting rod are provided with hinge grooves, and the two sides of the annular bracket are provided with through grooves. The two through grooves correspond one-to-one with the two hinge grooves, and a pin is slidably provided between the through groove and the connected hinge groove.

[0013] Preferably, the unidirectional positioning mechanism includes a hinge seat fixedly connected to the top of the guide plate, the side wall of the hinge seat is provided with a guide groove, and a hinge bushing is slidably disposed inside the guide groove;

[0014] A conical hinge shaft is movably inserted inside the hinge sleeve, and the conical end of the conical hinge shaft is slidably disposed at the lower part of the X-shaped connecting rod;

[0015] A return spring is installed between the conical hinge shaft and the inner wall of the hinge sleeve to drive the conical hinge shaft to return to its original position.

[0016] An insertion hole is formed inside the hinge seat and is coaxially arranged with the cone-head hinge shaft in its initial state.

[0017] Preferably, a limiting ring is fixedly sleeved at the middle of the conical hinge shaft, and the end of the return spring away from the hinge shaft sleeve overlaps with the side wall of the limiting ring;

[0018] The opening end of the insertion hole is chamfered to match the hinge shaft of the cone head.

[0019] Preferably, the hinge seat has a groove in the middle, the hinge bushing is slidably disposed inside the groove, and the guide groove is provided through both sides of the groove. Guide pins that cooperate with the corresponding guide grooves are installed on both sides of the hinge bushing.

[0020] The insertion hole is located at the upper part of the inner wall of the groove.

[0021] Preferably, the inner bottom surface of the cooling water tank is provided with a guide groove that cooperates with the guide plate, the left side of the cooling water tank is equipped with a water inlet valve, and the right side of the cooling water tank is equipped with a drain valve.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] In this invention, through the coordinated use of components such as the X-shaped connecting rod, pressure roller, and guide plate, when the composite pipe experiences increased local buoyancy due to process fluctuations, the pressure roller can overcome the spring force of the spring telescopic rod and float upward under the action of buoyancy, avoiding surface indentations or structural damage to the pipe that may be caused by rigid pressing. Through the transmission of the floating guide mechanism, the guide plate is driven to move upward synchronously to be close to the bottom of the floating pipe. The water inlet and overflow holes on the guide plate can accurately guide the coolant and flush away the original stagnant water layer, avoiding uneven cooling caused by the floating of the pipe, and ensuring the shaping quality and dimensional stability.

[0024] In this invention, through the coordinated use of components such as the hinge seat, hinge bushing, and conical hinge shaft, when the pressure roller that has shifted due to the upward movement of the pipe is driven by the corresponding X-shaped connecting rod, the guide plate can be lifted. An effective transmission connection is formed by the insertion of the conical hinge shaft and the insertion hole. Meanwhile, the X-shaped connecting rod on the side that has not shifted remains in its initial state, and its corresponding one-way positioning mechanism is in a decoupled state. This prevents the guide plate from generating reverse resistance during its lifting motion, avoids unnecessary deformation and additional load on the non-working side connecting rod system, and improves the reliability and service life of the device. Attached Figure Description

[0025] Figure 1 This is a perspective view showing the positions of the screw extruder and cooling water tank in this invention;

[0026] Figure 2 This is a cross-sectional view of a portion of the cooling water tank and pressure roller of the present invention;

[0027] Figure 3 This is a perspective view of the positions of the X-shaped connecting rod and the guide plate of the present invention;

[0028] Figure 4 For the present invention Figure 3 Enlarged view of the structure at point A in the middle;

[0029] Figure 5 This is a cross-sectional view of a portion of the guide plate of the present invention;

[0030] Figure 6 For the present invention Figure 5 Enlarged view of the structure at point B;

[0031] Figure 7 This is a cross-sectional view of a portion of the hinged bushing and the conical hinged shaft of the present invention;

[0032] Figure 8 This is a perspective view of the annular support and through groove of the present invention.

[0033] In the diagram: 1. Forming support; 2. Screw extruder; 3. Cooling water tank; 4. Pressure roller; 5. Guide plate; 6. Floating guide mechanism; 601. Annular support; 602. Spring telescopic rod; 603. X-type connecting rod; 604. Hinge groove; 605. Through groove; 606. Pin; 7. One-way positioning mechanism; 701. Hinge seat; 702. Guide groove; 703. Hinge bushing; 704. Conical hinge shaft; 705. Return spring; 706. Insertion hole; 707. Limiting ring; 708. Groove; 709. Guide pin; 8. Water inlet hole; 9. Overflow hole; 10. Positioning groove; 11. Roller; 12. Positioning rod. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figures 1 to 8 This invention provides a technical solution: an extrusion molding device for producing glass fiber composite materials, comprising: a molding support 1, a screw extruder 2 fixedly mounted on the top left side of the molding support 1, and a cooling water tank 3 mounted on the top of the molding support 1, which cooperates with the discharge end of the screw extruder 2. Pressure rollers 4 are symmetrically arranged inside the cooling water tank 3 to restrict the floating of the composite pipe. It should be noted that the composite pipe processed by the screw extruder enters the cooling water tank for cooling and shaping.

[0036] It also includes a guide plate 5 that is vertically slidably installed on the lower part of the inner wall of the cooling water tank 3, and a floating guide mechanism 6 that drives the guide plate 5 to move upward, which is used to guide the coolant to the bottom position of the composite pipe after it floats up.

[0037] The upper part of the guide plate 5 is movably connected to the lower part of the floating guide mechanism 6 by a one-way positioning mechanism 7, which enables the pressure roller 4 to drive the guide plate 5 in one direction. It should be noted that the guide plate 5 is made of aluminum to reduce the load on the pressure roller during the upward movement process.

[0038] In this embodiment, as Figures 1 to 8 As shown, the guide plate 5 has several staggered water inlet holes 8 inside, and an overflow hole 9 that matches the water inlet holes 8 is provided through the middle of the guide plate 5. It should be noted that the left end of the guide plate 5 has a chamfer to reduce the flow resistance of the coolant. After the coolant enters the water inlet hole 8, some of the flowing coolant is discharged from the overflow hole 9 and acts on the bottom of the composite pipe, avoiding the formation of a stagnant water layer and ensuring the cooling effect.

[0039] The guide plate 5 has symmetrically arranged positioning grooves 10 on its front and rear sides, and rollers 11 are symmetrically rotatably arranged on the inner wall of the positioning grooves 10. The inner wall of the cooling water tank 3 is vertically fixedly connected to a positioning rod 12 that cooperates with the positioning grooves 10, and the surface of the rollers 11 overlaps with the surface of the positioning rods 12. It should be noted that: by cooperating with the positioning rods 12, the guide plate 5 moves upward inside the cooling water tank 3 by rolling friction, reducing frictional resistance and ensuring that the pressure roller 4 effectively moves the guide plate 5 through the X-shaped connecting rod 603.

[0040] In this embodiment, as Figures 1 to 8 As shown, the floating guide mechanism 6 includes annular supports 601 symmetrically fixedly connected to both ends of the pressure roller 4, and a spring telescopic rod 602 is fixedly connected between the top of the annular supports 601 and the inner top surface of the cooling water tank 3. It should be noted that the elastic pressure of the spring telescopic rod 602 can stably confine the composite pipe in the cooling water along with the pressure roller 4. When the buoyancy generated at a local location of the composite pipe increases, this buoyancy will drive the spring telescopic rod 602 to overcome its elastic force and drive the pressure roller 4 to move upward. This prevents the spring telescopic rod 602 from always being in a state of high elastic pressure and acting on the surface of the composite pipe for a long time, thus continuously confining the composite pipe to the surface where buoyancy increases, and causing damage to the composite pipe.

[0041] An X-shaped connecting rod 603 is hinged to the inner wall of the cooling water tank 3 and engages with an annular bracket 601. The upper end of the X-shaped connecting rod 603 is hinged to both sides of the annular bracket 601. The upward movement of the annular bracket 601 drives the hinged X-shaped connecting rod 603 to deform. It should be noted that the middle of the X-shaped connecting rod 603 is rotatably connected to a support shaft. One end of the support shaft is fixedly connected to the inner wall of the cooling water tank 3. The X-shaped connecting rod 603 consists of two hinged rods arranged crosswise and engaged with the support shaft, enabling the X-shaped connecting rod 603 to deform.

[0042] The lower end of the X-shaped connecting rod 603 is hinged to the upper part of the guide plate 5, and the deformed X-shaped connecting rod 603 drives the hinged guide plate 5 to move upward.

[0043] In this embodiment, as Figures 1 to 8As shown, the X-shaped connecting rod 603 has hinge slots 604 on both its upper and lower parts, and the annular bracket 601 has through slots 605 on both sides. The two through slots 605 correspond one-to-one with the two hinge slots 604. A pin 606 is slidably connected between the through slot 605 and the connected hinge slot 604. It should be noted that the pin 606 is designed with an H-shaped structure to prevent it from falling out between the through slot 605 and the hinge slot 604. When the pressure roller 4 moves the annular bracket 601 upward, the two sides of the annular bracket 601 move synchronously with the pin 606 through the through slots 605, so that the pin 606 slides with the hinge slot 604 on the X-shaped connecting rod 603. Then, the X-shaped connecting rod 603 begins to deflect and deform with the support shaft as the fulcrum. At this time, the lower end of the X-shaped connecting rod 603 pulls the guide plate 5 upward synchronously.

[0044] In this embodiment, as Figures 1 to 8 As shown, the one-way positioning mechanism 7 includes a hinge seat 701 fixedly connected to the top of the guide plate 5. The side wall of the hinge seat 701 is provided with a guide groove 702, and a hinge bushing 703 is slidably disposed inside the guide groove 702.

[0045] A conical hinge shaft 704 is inserted inside the hinge sleeve 703, with its conical end slidably positioned at the lower part of the X-shaped connecting rod 603. It should be noted that the conical hinge shaft 704 is inserted into the hinge groove 604 at the lower part of the X-shaped connecting rod 603. When the X-shaped connecting rod 603 deforms, it presses against the conical surface of the conical hinge shaft 704, driving the conical hinge shaft 704 to move further into the hinge sleeve 703.

[0046] A return spring 705 is provided between the inner wall of the conical hinge shaft 704 and the hinge sleeve 703 to drive the conical hinge shaft 704 to return to its original position.

[0047] An insertion hole 706 is provided inside the hinge seat 701 and is coaxially arranged with the conical hinge shaft 704 in its initial state. It should be noted that when the conical hinge shaft 704 moves into the hinge sleeve 703, the conical hinge shaft 704 passes through the hinge sleeve 703 and is inserted into the insertion hole 706 inside the hinge seat 701, so that during the deformation of the X-type connecting rod 603, the conical hinge shaft 704, through which the guide plate 5 moves steadily upward.

[0048] In this embodiment, as Figures 1 to 8 As shown, a limiting ring 707 is fixedly sleeved in the middle of the conical hinge shaft 704, and the end of the return spring 705 away from the hinge shaft sleeve 703 overlaps with the side wall of the limiting ring 707.

[0049] The opening end of the socket 706 is chamfered to match the conical hinge shaft 704.

[0050] In this embodiment, as Figures 1 to 8 As shown, a groove 708 is provided in the middle of the hinge seat 701, and the hinge bushing 703 is slidably disposed inside the groove 708. A guide groove 702 is provided through both sides of the groove 708, and guide pins 709 that mate with the corresponding guide grooves 702 are installed on both sides of the hinge bushing 703. It should be noted that the guide pins 709 and guide grooves 702 are designed to allow the hinge bushing to slide stably vertically within the hinge seat. Furthermore, the positioning of the hinge bushing ensures the position of the conical hinge shaft, preventing it from detaching from the lower part of the X-shaped connecting rod during use.

[0051] The insertion hole 706 is located on the upper part of the inner wall of the groove 708. It should be noted that when the left pressure roller 4 of the cooling water tank 3 produces a vertical lifting displacement, the adjacent conical hinge rod is driven to insert into the insertion hole 706 of the guide plate 5 through the corresponding X-type connecting rod, forming an effective transmission connection. During the process of the guide plate 5 being vertically lifted synchronously with the deformed X-type connecting rod, when the right pressure roller 4 of the cooling water tank 3 has no vertical displacement, the corresponding X-type connecting rod maintains its initial undeformed state, and the conical hinge rod on this side is not inserted into the corresponding insertion hole 706. The guide plate 5 and the hinge seat 701 of the right X-type connecting rod are in a state of mechanical decoupling. During the lifting stroke of the guide plate 5, it will not cause reverse driving deformation to the right X-type connecting rod, avoiding additional load from deformation of the non-working side connecting rod and reducing the vertical movement resistance of the guide plate 5.

[0052] In this embodiment, as Figures 1 to 8 As shown, the inner bottom surface of the cooling water tank 3 has a guide groove that cooperates with the guide plate 5. An inlet valve is installed on the left side of the cooling water tank 3, and a drain valve is installed on the right side. It should be noted that the circulating coolant enters the cooling water tank 3 through the inlet valve on the left side and then exits through the drain valve, thus achieving coolant circulation.

[0053] In this embodiment, as Figures 1 to 8 As shown, a method of using an extrusion molding apparatus for producing glass fiber composite materials includes the following steps:

[0054] S1. During operation, the screw extruder 2 continuously conveys the extruded composite pipe to the cooling water tank 3. Under the elastic pre-tightening action of the spring telescopic rod 602 of the pressure roller 4, the composite pipe is horizontally oriented along the cooling water tank 3 and is cooled and shaped by circulating coolant. When the composite pipe is subjected to local buoyancy increase in the corresponding area of ​​the water tank due to factors such as the deviation of resin matrix ratio and uneven cooling shrinkage during the extrusion process, the local buoyancy will overcome the elastic force of the spring telescopic rod 602 and drive the pressure roller 4 at the corresponding position to produce a vertical lifting displacement.

[0055] S2. During the vertical lifting of the pressure roller 4, the annular support 601 moves upward synchronously. The pins 606 in the through grooves 605 on both sides of the annular support 601 and the upper hinge groove 604 of the X-type connecting rod 603 form a sliding fit, driving the X-type connecting rod 603 to deflect and deform with the middle support shaft as the hinge fulcrum. The two upper hinge ends of the X-type connecting rod 603 move in opposite directions, and the two lower hinge ends also move synchronously. The deflection of the lower part of the X-type connecting rod 603 squeezes the conical end of the conical hinge shaft 704, causing the conical hinge shaft 704 to slide into the hinge bushing 703 and insert into the insertion hole 706 of the hinge seat 701, thus establishing an effective transmission connection between the X-type connecting rod 603 and the guide plate 5. The deformed X-type connecting rod 603 drives the guide plate 5 to rise vertically synchronously through the one-way positioning mechanism 7, avoiding the pressure roller 4 rigidly pressing the floating section of the composite pipe and causing damage to the profile.

[0056] S3. After the guide plate 5 is vertically raised, the circulating coolant in the cooling water tank 3 flows in a directional manner through the water inlet hole 8 of the guide plate 5. Some of the coolant flows through the water inlet hole 8, and the rest of the coolant overflows and is output through the overflow hole 9 that matches the water inlet hole 8 to the bottom area of ​​the composite pipe after it is raised. This accurately cools the heat exchange surface at the bottom of the composite pipe, eliminates the stagnant water layer formed between the bottom of the composite pipe and the water tank after it floats up, and ensures the cooling and shaping quality of the composite pipe.

[0057] S4. In the case of non-full-area increase in local buoyancy of composite pipe, the X-shaped connecting rod 603 corresponding to the floating pressure roller 4 on one side of the cooling water tank 3 undergoes hinge deformation, triggering the cone-head hinge shaft 704 to engage with the insertion hole 706, forming a one-sided drive transmission state. Meanwhile, the X-shaped connecting rod 603 corresponding to the non-floating pressure roller 4 remains in the initial undeformed state. The cone-head hinge shaft 704 on this side and the insertion hole 706 of the hinge seat 701 are in a separated and decoupled state. When the guide plate 5 rolls vertically along the positioning rod 12 through the roller 11, it is only driven by the one-sided deformed X-shaped connecting rod 603 and will not generate a reverse drive load on the non-working side X-shaped connecting rod 603, effectively reducing the additional resistance of the vertical movement of the guide plate 5.

[0058] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An extrusion molding apparatus for producing glass fiber composite materials, comprising a molding support (1), wherein a screw extruder (2) is fixedly installed on the left side of the top of the molding support (1), and a cooling water tank (3) that cooperates with the discharge end of the screw extruder (2) is installed on the top of the molding support (1), and pressure rollers (4) that restrict the floating of composite pipes are symmetrically arranged inside the cooling water tank (3). Its features are, It also includes: a guide plate (5) that is vertically slidably installed on the lower part of the inner wall of the cooling water tank (3), and a floating guide mechanism (6) that drives the guide plate (5) to move upward is movably connected to the surface of the pressure roller (4), which is used to guide the coolant to the bottom position of the composite pipe after it floats up; The upper part of the guide plate (5) is movably connected to the lower part of the floating guide mechanism (6) by a one-way positioning mechanism (7), so that the pressure roller (4) drives the guide plate (5) in one direction.

2. The extrusion molding apparatus for producing glass fiber composite materials according to claim 1, characterized in that: The guide plate (5) has several water inlet holes (8) arranged in a staggered manner inside, and the guide plate (5) has an overflow hole (9) that cooperates with the water inlet holes (8) through the middle. The guide plate (5) has symmetrically provided positioning grooves (10) on its front and rear sides, and rollers (11) are symmetrically rotated on the inner wall of the positioning grooves (10). The inner wall of the cooling water tank (3) is vertically fixedly connected to a positioning rod (12) that cooperates with the positioning grooves (10), and the surface of the rollers (11) overlaps with the surface of the positioning rods (12).

3. The extrusion molding apparatus for producing glass fiber composite materials according to claim 2, characterized in that: The floating guide mechanism (6) includes an annular bracket (601) symmetrically fixedly connected to both ends of the pressure roller (4), and a spring telescopic rod (602) is fixedly connected between the top of the annular bracket (601) and the inner top surface of the cooling water tank (3). An X-shaped connecting rod (603) is hinged to the inner wall of the cooling water tank (3) and cooperates with the annular bracket (601). The upper end of the X-shaped connecting rod (603) is hinged to both sides of the annular bracket (601). The upward-moving annular bracket (601) drives the hinged X-shaped connecting rod (603) to deform. The lower end of the X-shaped link (603) is hinged to the upper part of the guide plate (5), and the deformed X-shaped link (603) drives the hinged guide plate (5) to move upward.

4. The extrusion molding apparatus for producing glass fiber composite materials according to claim 3, characterized in that: The upper and lower parts of the X-shaped connecting rod (603) are provided with hinge grooves (604), and the two sides of the annular bracket (601) are provided with through grooves (605). The two through grooves (605) correspond one-to-one with the two hinge grooves (604). A pin (606) is slidably provided between the through groove (605) and the connected hinge groove (604).

5. The extrusion molding apparatus for producing glass fiber composite materials according to claim 4, characterized in that: The one-way positioning mechanism (7) includes a hinge seat (701) fixedly connected to the top of the guide plate (5), the side wall of the hinge seat (701) is provided with a guide groove (702), and a hinge bushing (703) is slidably arranged inside the guide groove (702). A conical hinge shaft (704) is movably inserted inside the hinge sleeve (703), and the conical end of the conical hinge shaft (704) is slidably disposed at the lower part of the X-type connecting rod (603); A return spring (705) is provided between the inner wall of the conical hinge shaft (704) and the hinge sleeve (703) to drive the conical hinge shaft (704) to return to its original position. An insertion hole (706) is provided inside the hinge seat (701) and is coaxially arranged with the cone-head hinge shaft (704) in the initial state.

6. The extrusion molding apparatus for producing glass fiber composite materials according to claim 5, characterized in that: A limiting ring (707) is fixedly sleeved in the middle of the conical hinge shaft (704), and the end of the return spring (705) away from the hinge shaft sleeve (703) overlaps with the side wall of the limiting ring (707). The opening end of the insertion hole (706) is provided with a chamfer that matches the conical hinge shaft (704).

7. The extrusion molding apparatus for producing glass fiber composite materials according to claim 6, characterized in that: The hinge seat (701) has a groove (708) in the middle, the hinge bushing (703) is slidably disposed inside the groove (708), and the guide groove (702) is disposed through both sides inside the groove (708). The hinge bushing (703) is equipped with guide pins (709) that cooperate with the corresponding guide grooves (702) on both sides. The insertion hole (706) is located on the upper part of the inner wall of the groove (708).

8. The extrusion molding apparatus for producing glass fiber composite materials according to claim 7, characterized in that: The inner bottom surface of the cooling water tank (3) is provided with a guide groove that cooperates with the guide plate (5). A water inlet valve is installed on the left side of the cooling water tank (3), and a drain valve is installed on the right side of the cooling water tank (3).

9. A method of using an extrusion molding apparatus for producing glass fiber composite materials, characterized in that, Using an extrusion molding apparatus for producing glass fiber composite materials as described in any one of claims 1-8, the process includes the following steps: S1. When the device is running, the screw extruder (2) continuously feeds the formed composite pipe into the cooling water tank (3). The pipe is kept horizontally conveyed under the elastic pre-tightening action of the pressure roller (4) and its spring telescopic rod (602), and is cooled and shaped by circulating coolant. When the pipe has a local increase in buoyancy due to uneven material composition or difference in cooling shrinkage, the buoyancy will overcome the spring force of the spring telescopic rod (602) and drive the pressure roller (4) at the corresponding position to rise upward. S2. When the pressure roller (4) is lifted, it drives the ring bracket (601) to move upward. Then, through the cooperation of the pin (606) and the hinge groove (604), the X-type connecting rod (603) is driven to deflect and deform with its support shaft as the fulcrum. During the deformation process, the lower part of the X-type connecting rod (603) squeezes the conical surface of the cone-head hinge shaft (704) and makes it slide into the insertion hole (706) of the hinge seat (701), thereby establishing an effective transmission connection between the X-type connecting rod (603) and the guide plate (5). Subsequently, the deformed X-type connecting rod (603) drives the guide plate (5) to move upward synchronously through the one-way positioning mechanism (7), avoiding the pressure roller (4) from causing rigid extrusion damage to the floating pipe section. S3. After the guide plate (5) moves up, the coolant flows in a direction through the water inlet (8) inside it. Some of the coolant overflows through the overflow hole (9) to the bottom area of ​​the floating pipe, and the heat exchange surface is precisely cooled there, thereby eliminating the bottom stagnant water layer caused by the floating of the pipe, and ensuring uniform cooling and shaping quality. S4. When only one side of the pressure roller (4) floats up due to local buoyancy, only the X-shaped connecting rod (603) on that side deforms and triggers the corresponding one-way positioning mechanism (7) to lock, forming a one-way drive. The mechanism on the non-floating side remains decoupled. When the guide plate (5) slides vertically along the positioning rod (12) through the roller (11), it is only driven by the working side connecting rod and will not apply a reverse load to the non-working side connecting rod, thereby significantly reducing the additional resistance of the guide plate (5) movement.

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