Thickness-adjustable hull thermoplastic composite material mold pressing mold and forming method

Abstract

The invention discloses a thickness-adjustable hull thermoplastic composite material mold pressing mold and a molding method, and belongs to the technical field of hull component molding. The thickness-adjustable hull thermoplastic composite material mold pressing mold comprises a lower mold and an upper mold; the lower die comprises two half die mechanisms, a plurality of width limiting guide rails and a plurality of height limiting guide rails; the upper die comprises an upper die body and a pressing part, and the pressing part is in sliding fit with the upper die body; the bending inner end faces of the two half die mechanisms are the outer end faces of the compression molding cavity, and the left side face, the bottom side face and the right side face of the upper die body are the inner end faces of the compression molding cavity. And baffles are arranged on the front and rear end faces of the lower die and surround the front and rear sides of an interval defined by the inner end face and the outer end face to form a compression molding cavity. According to the mold pressing mold, through modular design, the width limiting guide rails and the height limiting guide rails only need to be replaced according to different thickness requirements, flexible forming of hull typical structural parts of various thicknesses in the same mold can be achieved, and cost increase and machining complexity increase caused by frequent switching of multiple sets of molds are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of hull component molding, and particularly relates to a hull thermoplastic composite material molding die with adjustable thickness and a molding method. Background Art

[0002] In the field of shipbuilding, the hull structure usually has large size and complex geometric structure. One of the commonly used typical hull structural parts is Figure 1 The bending structure shown in the figure can currently be efficiently in-situ formed by compression molding using thermoplastic resin-based composite materials. However, due to the limitations of fixed mold design, current molds are usually only suitable for molding components of a single thickness, while the actual hull requires components of different thicknesses. Figure 1 Typical structural components of a ship's hull are shown.

[0003] In order to solve the limitation that traditional molds cannot adapt to the molding of components with multiple thicknesses, this application proposes a thickness-adjustable hull thermoplastic composite molding mold and molding method. The molding mold adopts modular design. Only the width-limiting guide rail and the height-limiting guide rail need to be replaced according to different thickness requirements, thereby realizing flexible molding of typical hull structural parts of various thicknesses in the same mold, avoiding the frequent switching of multiple sets of molds to increase costs and processing complexity. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a hull thermoplastic composite material molding die with adjustable thickness.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A hull thermoplastic composite material compression mold with adjustable thickness, comprising a lower mold and an upper mold capable of enclosing a compression molding cavity;

[0007] The lower mold comprises two symmetrically arranged half-mold mechanisms and a plurality of width-limiting guide rails of different widths and a plurality of height-limiting guide rails of different heights; any one of the width-limiting guide rails can be fitted between the lower parts of the two half-mold mechanisms, and any one of the height-limiting guide rails can be fitted at the top of the half-mold mechanisms;

[0008] The upper mold includes an upper mold body and a pressing portion symmetrically arranged on the upper left and right sides of the upper mold body, and the pressing portion and the upper mold body are slidably matched in the left and right directions;

[0009] The bent inner end surface formed by the cooperation of the two half-mold mechanisms and the corresponding width-limiting guide rails and height-limiting guide rails is the outer end surface of the molding chamber, and the left side surface, bottom side surface and right side surface of the upper mold body connected in sequence are the inner end surface of the molding chamber; the front and rear end surfaces of the lower mold are provided with baffles extending in a direction perpendicular to the outer end surface, and the baffles enclose the front and rear sides of the interval enclosed by the inner end surface and the outer end surface to form a molding chamber.

[0010] Preferably, the lower mold and the upper mold are provided with a plurality of heating tubes for heating the medium in the molding chamber and a plurality of temperature sensors for monitoring the temperature;

[0011] The lower mold and the upper mold are provided with a plurality of cooling water pipes for cooling the medium in the molding chamber. All the cooling water pipes are arranged in parallel, one end of the parallel cooling water pipes is connected to the main water inlet pipe, and the other end of the parallel cooling water pipes is connected to the main water outlet pipe.

[0012] Preferably, the lower parts of the opposite sides of the two half-mold mechanisms are provided with first guide rail grooves extending in the front-to-back direction;

[0013] The width-limiting guide rail includes width-limiting sliders symmetrically arranged along the left-right direction for slidingly cooperating with the corresponding first guide rail grooves, and a width adjustment plate is arranged between the two width-limiting sliders;

[0014] In different width-limiting guide rails, the width of the width adjustment plate is different in the left and right directions;

[0015] After any width limiting guide rail cooperates with the two half-mold mechanisms, the top end surface of the width adjustment plate is flush with the outer end surface of the molding cavity, and the bottom end surface of the width adjustment plate is flush with the bottom surface of the lower mold.

[0016] Preferably, the width adjustment plate is provided with upwardly protruding width limiting baffles at the front and rear ends;

[0017] After any one of the width-limiting guide rails is matched with the two half-mold mechanisms, the left and right sides of the width-limiting baffle are connected to the side faces of the baffle on the corresponding half-mold mechanism.

[0018] Preferably, the top end of the half-mold mechanism is provided with a second guide rail groove extending in the front-to-back direction;

[0019] The height-limiting guide rail includes a height-limiting slider for slidingly cooperating with the second guide rail groove, and a height adjustment plate is fixedly provided on the top of the height-limiting slider;

[0020] In different height-limiting guide rails, the height of the height adjustment plate in the vertical direction is different;

[0021] After any one of the height-limiting guide rails cooperates with the half-mold mechanism, the side surface of the height-adjusting plate facing the compression molding cavity is flush with the outer end surface.

[0022] Preferably, the front and rear ends of the height adjustment plate are provided with height limiting baffles protruding to one side;

[0023] After any one of the height-limiting guide rails is matched with the half-mold mechanism, the bottom surface of the height-limiting baffle is connected with the top surface of the upper baffle of the half-mold mechanism.

[0024] Preferably, the clamping portion includes an L-shaped clamping plate, an adjustment slide rail is fixedly provided on the side of the L-shaped clamping plate facing the upper mold body, and a slide groove extending in the left and right directions is provided inside the upper mold body for slidingly cooperating with the adjustment slide rail.

[0025] Preferably, the half-mold mechanism is provided with a lower mold through-hole which penetrates along the front-to-back direction, and the upper mold body is provided with an upper mold through-hole which penetrates along the front-to-back direction.

[0026] The invention also provides a method for compression molding a hull thermoplastic composite material with adjustable thickness.

[0027] A method for compression molding a thermoplastic composite material for a ship hull with adjustable thickness is implemented based on a compression mold for a thermoplastic composite material for a ship hull with adjustable thickness, and comprises the following steps:

[0028] Step 1: Select a width-limiting guide rail of corresponding width and a height-limiting guide rail of corresponding height according to the size of the typical hull structural part to be formed, and assemble them with two half-mold mechanisms to form a complete lower mold. After assembly, the outer end surface of the lower mold is adapted to the outer wall surface of the typical hull structural part to be formed;

[0029] Step 2: placing the cut thermoplastic resin-based composite material prepreg slices on the outer end surface of the lower mold, and spot welding the edges of the thermoplastic resin-based composite material prepreg slices to the outer end surface to form a thermoplastic resin-based composite material preform;

[0030] Step 3: The hydraulic press controls the upper mold to descend so that the left side, bottom side, and right side of the upper mold are pressed against the thermoplastic resin-based composite material preform, while the hydraulic press applies a preset downward pressure;

[0031] Step 4: starting the heating tube to heat the thermoplastic resin-based composite material preform;

[0032] Step 5: After the heating temperature reaches the set value and stabilizes, the temperature and the preset pressure are maintained unchanged to perform molding and pressure holding;

[0033] Step 6: After the molding and holding pressure phase is completed, the heating pipe is turned off to maintain the preset pressure, and cooling water is introduced into the parallel cooling water pipe to cool the mold;

[0034] Step 7: When the temperature drops to the cooling set value, the hydraulic press gradually releases pressure and continues to cool until cooling is completed;

[0035] Step 8: The hydraulic press controls the upper mold to rise to realize demoulding.

[0036] The beneficial effects of the present invention are:

[0037] (1) The molding die in the present invention adopts a modular design. According to different thickness requirements, only the width-limiting guide rail and the height-limiting guide rail need to be replaced, so that the flexible molding of typical hull structural parts of various thicknesses can be achieved in the same mold, which significantly improves the mold's adaptability to the molding of typical hull structural parts of various thicknesses and avoids the frequent switching of multiple sets of molds that increases costs and processing complexity.

[0038] (2) Based on the mold of the present invention, it can be achieved Figure 1 The integrated molding of typical hull structural parts shown avoids the problems of interface bonding performance degradation and stress unevenness in traditional splicing processes, and significantly improves the overall quality and mechanical properties of the molded parts.

[0039] (3) In the present invention, the arrangement of the lower mold through holes and the upper mold through holes enables the mold to form a hollow design, which not only effectively reduces the weight of the mold, but also can perform cold air-assisted cooling of the medium in the molding chamber. Combined with the cooling method of introducing cooling water into the cooling water pipe, the cooling efficiency of the mold is significantly improved, and the molding cycle is further shortened. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The drawings in the specification, which constitute a part of this application, are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0041] Figure 1 It is a structural diagram of a typical hull structure in the background art;

[0042] Figure 2 It is a schematic structural diagram of the thermoplastic composite material molding die for a ship hull with adjustable thickness according to the present invention when it is unfolded;

[0043] Figure 3 It is a structural schematic diagram of the lower mold in the present invention;

[0044] Figure 4 It is a structural diagram of the half-mold mechanism in the present invention;

[0045] Figure 5 It is a structural schematic diagram of the width-limiting guide rail in the present invention;

[0046] Figure 6 It is a structural schematic diagram of the height-limiting guide rail in the present invention;

[0047] Figure 7 It is a structural schematic diagram of the upper mold in the present invention;

[0048] Figure 8 It is a schematic structural diagram of the thermoplastic composite material molding die for a ship hull with adjustable thickness according to the present invention when the die is closed;

[0049] Figure 9 This is a schematic cross-sectional view of the structure of the thermoplastic composite material molding die for a ship hull with adjustable thickness according to the present invention when the die is closed;

[0050] in:

[0051] 1. Lower die; 11. Half-die mechanism; 111. First guide rail groove; 112. Second guide rail groove; 113. Lower die through hole; 12. Outer end surface; 13. Width-limiting guide rail; 131. Width-limiting slider; 132. Width adjustment plate; 133. Width-limiting baffle; 14. Height-limiting guide rail; 141. Height-limiting slider; 142. Height adjustment plate; 143. Height-limiting baffle;

[0052] 2. Upper die; 21. Upper die body; 211. Upper die through hole; 22. Pressing portion; 221. L-shaped pressing plate; 222. Adjusting slide rail; 23. Inner end surface;

[0053] 3. Baffle;

[0054] 4. Cooling water pipe installation hole;

[0055] 5. Heating tube installation hole;

[0056] 6. Sensor hole. DETAILED DESCRIPTION

[0057] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0058] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0059] In the present invention, the directions or positional relationships indicated by terms such as "upper", "lower", "bottom", and "top" are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention. They do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

[0060] In the present invention, terms such as "connected" and "connection" should be interpreted broadly to mean a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediary. Relevant researchers or technicians in this field may determine the specific meanings of these terms in the present invention based on specific circumstances, and they should not be construed as limitations on the present invention.

[0061] The present invention will be further described below with reference to the accompanying drawings and examples.

[0062] Example 1:

[0063] like Figures 2 to 9 As shown, a thickness-adjustable ship hull thermoplastic composite material molding die comprises a lower die 1 and an upper die 2 capable of enclosing a molding cavity;

[0064] The lower mold 1 includes two symmetrically arranged half-mold mechanisms 11 and a plurality of width-limiting guide rails 13 of different widths and a plurality of height-limiting guide rails 14 of different heights; any one of the width-limiting guide rails 13 can be fitted between the lower portions of the two half-mold mechanisms 11, and any one of the height-limiting guide rails 14 can be fitted at the top of the half-mold mechanism 11;

[0065] The upper mold 2 includes an upper mold body 21 and pressing parts 22 symmetrically arranged on the upper left and right sides of the upper mold body 21, and the pressing parts 22 are slidably matched with the upper mold body 21 in the left and right directions;

[0066] The bent inner end surface formed by the cooperation of the two half-mold mechanisms 11 and the corresponding width-limiting guide rails 13 and height-limiting guide rails 14 is the outer end surface 12 of the molding chamber, and the left side surface, bottom side surface and right side surface connected in sequence to the upper mold body 21 are the inner end surface 23 of the molding chamber; the front and rear end surfaces of the lower mold 1 are provided with baffles 3 extending in a direction perpendicular to the outer end surface 12, and the baffles 3 enclose the front and rear sides of the interval enclosed by the inner end surface 23 and the outer end surface 12 to form a molding chamber.

[0067] Preferably, the lower mold 1 and the upper mold 2 are provided with a plurality of heating tubes for heating the medium in the molding chamber and a plurality of temperature sensors for monitoring the temperature;

[0068] The lower mold 1 and the upper mold 2 are provided with a plurality of cooling water pipes for cooling the medium in the molding chamber. All the cooling water pipes are arranged in parallel, one end of the parallel cooling water pipes is connected to the main water inlet pipe, and the other end of the parallel cooling water pipes is connected to the main water outlet pipe.

[0069] Specifically, the lower mold 1 and the upper mold 2 are provided with a plurality of cooling water pipe installation holes 4 for installing cooling water pipes, a plurality of heating pipe installation holes 5 for installing heating pipes, and a plurality of sensor holes 6 for installing temperature sensors.

[0070] Preferably, the lower parts of the opposite sides of the two half-mold mechanisms 11 are provided with first guide rail grooves 111 extending in the front-to-back direction;

[0071] The width-limiting guide rail 13 includes width-limiting sliders 131 symmetrically arranged along the left-right direction for slidingly cooperating with the corresponding first guide rail groove 111 , and a width adjustment plate 132 is provided between the two width-limiting sliders 131 ;

[0072] In different width-limiting guide rails 13 , the width of the width adjustment plate 132 along the left-right direction is different;

[0073] After any one of the width-limiting guide rails 13 cooperates with the two half-mold mechanisms 11 , the top end surface of the width adjustment plate 132 is flush with the outer end surface 12 of the molding chamber, and the bottom end surface of the width adjustment plate 132 is flush with the bottom surface of the lower mold 1 .

[0074] Specifically, the first guide rail groove 111 is a dovetail groove structure.

[0075] Preferably, the width adjustment plate 132 is provided with upwardly protruding width limiting baffles 133 at the front and rear ends;

[0076] After any one of the width-limiting guide rails 13 is matched with the two half-mold mechanisms 11 , the left and right sides of the width-limiting baffle 133 are connected to the side surfaces of the baffle 3 on the corresponding half-mold mechanism 11 .

[0077] Preferably, the top of the half-mold mechanism 11 is provided with a second guide rail groove 112 extending in the front-to-back direction;

[0078] The height-limiting guide rail 14 includes a height-limiting slider 141 for slidingly cooperating with the second guide rail groove 112 , and a height-adjusting plate 142 is fixedly provided on the top of the height-limiting slider 141 ;

[0079] In different height-limiting guide rails 14 , the height of the height adjustment plate 142 along the vertical direction is different;

[0080] After any one of the height-limiting guide rails 14 is matched with the half-mold mechanism 11 , the side surface of the height-adjusting plate 142 facing the molding chamber is flush with the outer end surface 12 .

[0081] Specifically, the second guide rail groove 112 is a dovetail groove structure.

[0082] Preferably, the front and rear ends of the height adjustment plate 142 are provided with height limiting baffles 143 protruding to one side;

[0083] After any one of the height-limiting guide rails 14 is matched with the half-mold mechanism 11 , the bottom surface of the height-limiting baffle 143 is in contact with the top surface of the upper baffle 3 of the half-mold mechanism 11 .

[0084] Preferably, the clamping portion 22 includes an L-shaped clamping plate 221, and an adjustment slide rail 222 is fixedly provided on the side of the L-shaped clamping plate 221 facing the upper mold body 21. A slide groove extending in the left and right directions is provided inside the upper mold body 21 for slidingly cooperating with the adjustment slide rail 222.

[0085] The bottom end surface of the horizontal plate in the L-shaped pressing plate 221 can be pressed against the corresponding height-limiting guide rail 14 , and the inner end surface of the vertical plate in the L-shaped pressing plate 221 can be in contact with the side surface of the corresponding half-mold mechanism 11 .

[0086] Specifically, the slide groove is a dovetail groove structure.

[0087] Preferably, the mold half mechanism 11 is provided with a lower mold through-hole 113 extending in the front-to-back direction, and the upper mold body 21 is provided with an upper mold through-hole 211 extending in the front-to-back direction. The provision of the lower mold through-hole 113 and the upper mold through-hole 211 creates a hollow mold design, which not only effectively reduces the mold weight but also allows for cold air-assisted cooling of the medium within the molding chamber. Combined with the cooling method of introducing cooling water into the cooling water pipe, this significantly improves mold cooling efficiency and further shortens the molding cycle.

[0088] Example 2:

[0089] A method for compression molding a thermoplastic composite material for a ship hull with adjustable thickness is implemented based on the compression mold for the thermoplastic composite material for a ship hull with adjustable thickness in Example 1, comprising the following steps:

[0090] Step 1: Select a width-limiting guide rail 13 of corresponding width and a height-limiting guide rail 14 of corresponding height according to the size of the typical hull structural part to be formed, and assemble them with the two half-mold mechanisms 11 to form a complete lower mold 1. After assembly, the outer end surface 12 of the lower mold 1 is adapted to the outer wall surface of the typical hull structural part to be formed;

[0091] Step 2: Laying the cut thermoplastic resin-based composite material prepreg slices on the outer end surface 12 of the lower mold 1, and spot welding the edges of the thermoplastic resin-based composite material prepreg slices to the outer end surface 12 to form a thermoplastic resin-based composite material preform to prevent the prepreg from being dislocated during the subsequent molding process;

[0092] In step 3, the hydraulic press controls the upper mold 2 to descend, so that the left side, bottom side, and right side of the upper mold 2 are pressed against the thermoplastic resin-based composite material preform. At the same time, the hydraulic press applies a preset downward pressure. At this time, the inner end surface of the vertical plate in the L-shaped pressing plate 221 is in contact with the side surface of the corresponding half-mold mechanism 11. In addition, at this time, the bottom end surface of the horizontal plate in the L-shaped pressing plate 221 is not pressed against the corresponding height-limiting guide rail 14. Therefore, the compression molding chamber containing the prepreg slices is not completely closed, which is conducive to gas discharge during the heating and pressurization stage, thereby effectively suppressing the formation of interlayer bubble defects.

[0093] Step 4: Start the heating tube to heat the thermoplastic resin-based composite material preform. During this process, the temperature sensor monitors the temperature and transmits the temperature to the temperature control system, which regulates the heating power of the heating tube.

[0094] Step 5: After the heating temperature reaches the heating set value and stabilizes, the temperature and the preset pressure are maintained unchanged to perform molding and pressure holding; wherein the heating set value ranges from Tm+30°C to Tm+50°C, where Tm is the melting temperature, and different composite systems have their own specific Tm;

[0095] Step 6: After the molding and holding pressure stage, the heating tube is turned off to maintain the preset pressure. Cooling water is introduced into the parallel cooling water pipes to cool the mold. At the same time, cold air is introduced through the lower mold through-hole 113 and the upper mold through-hole 211 to achieve synergistic cooling by water cooling and air cooling, thereby accelerating the temperature reduction of the mold and the molded part.

[0096] Step 7: When the temperature drops to the cooling set value, the hydraulic press gradually releases the pressure and continues to cool until the cooling is completed to prevent the preform from being locally loose due to the elastic rebound of the fibers, thereby causing defects such as porosity, reduced surface quality, and weakened interlayer bonding strength. It also helps to release some thermal stress and prevent warping or demolding defects caused by internal stress accumulation. The cooling set value range is Tg-10°C to Tg-20°C, where Tg is the glass transition temperature, and different composite systems have their own specific Tg. The temperature when cooling is completed is room temperature.

[0097] Step 8: The hydraulic press controls the upper mold 2 to rise to realize demoulding.

[0098] The molding die in the present invention adopts a modular design. Only the width limiting guide rail 13 and the height limiting guide rail 14 need to be replaced according to different thickness requirements, so as to realize the flexible molding of typical hull structural parts of various thicknesses in the same mold, significantly improving the mold's adaptability to the molding of typical hull structural parts of various thicknesses, and avoiding the frequent switching of multiple sets of molds to increase costs and processing complexity.

[0099] Based on the mold of the present invention, it can be achieved Figure 1The integrated molding of typical hull structural parts shown avoids the problems of interface bonding performance degradation and stress unevenness in traditional splicing processes, and significantly improves the overall quality and mechanical properties of the molded parts.

[0100] Although the above describes the specific embodiments of the present invention in conjunction with the accompanying drawings, it is not a limitation of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without any creative work are still within the scope of protection of the present invention.

Claims

1. A thickness-adjustable thermoplastic composite material molding die for a ship hull, characterized in that: It includes a lower mold and an upper mold capable of surrounding a molding cavity; The lower mold comprises two symmetrically arranged half-mold mechanisms and a plurality of width-limiting guide rails of different widths and a plurality of height-limiting guide rails of different heights; any one of the width-limiting guide rails can be fitted between the lower parts of the two half-mold mechanisms, and any one of the height-limiting guide rails can be fitted at the top of the half-mold mechanisms; The upper mold includes an upper mold body and a pressing portion symmetrically arranged on the upper left and right sides of the upper mold body, and the pressing portion and the upper mold body are slidably matched in the left and right directions; The bent inner end surface formed by the cooperation of the two half-mold mechanisms and the corresponding width-limiting guide rails and height-limiting guide rails is the outer end surface of the molding chamber, and the left side surface, bottom side surface and right side surface of the upper mold body connected in sequence are the inner end surface of the molding chamber; the front and rear end surfaces of the lower mold are provided with baffles extending in a direction perpendicular to the outer end surface, and the baffles enclose the front and rear sides of the interval enclosed by the inner end surface and the outer end surface to form a molding chamber.

2. The thickness-adjustable thermoplastic composite material molding die for a ship hull according to claim 1, characterized in that: The lower mold and the upper mold are provided with a plurality of heating tubes for heating the medium in the molding chamber and a plurality of temperature sensors for monitoring the temperature; The lower mold and the upper mold are provided with a plurality of cooling water pipes for cooling the medium in the molding chamber. All the cooling water pipes are arranged in parallel, one end of the parallel cooling water pipes is connected to the main water inlet pipe, and the other end of the parallel cooling water pipes is connected to the main water outlet pipe.

3. The thickness-adjustable thermoplastic composite material molding die for a ship hull according to claim 2, characterized in that: The lower parts of the opposite sides of the two half-mold mechanisms are provided with first guide rail grooves extending in the front-to-back direction; The width-limiting guide rail includes width-limiting sliders symmetrically arranged along the left-right direction for slidingly cooperating with the corresponding first guide rail grooves, and a width adjustment plate is arranged between the two width-limiting sliders; In different width-limiting guide rails, the width of the width adjustment plate is different in the left and right directions; After any width limiting guide rail cooperates with the two half-mold mechanisms, the top end surface of the width adjustment plate is flush with the outer end surface of the molding cavity, and the bottom end surface of the width adjustment plate is flush with the bottom surface of the lower mold.

4. The thickness-adjustable thermoplastic composite material molding die for a ship hull according to claim 3, characterized in that: The front and rear ends of the width adjustment plate are provided with upwardly protruding width limiting baffles; After any one of the width-limiting guide rails is matched with the two half-mold mechanisms, the left and right sides of the width-limiting baffle are connected to the side faces of the baffle on the corresponding half-mold mechanism.

5. The thickness-adjustable thermoplastic composite material molding die for a ship hull according to claim 2, characterized in that: The top end of the half-mold mechanism is provided with a second guide rail groove extending in the front-to-back direction; The height-limiting guide rail includes a height-limiting slider for slidingly cooperating with the second guide rail groove, and a height adjustment plate is fixedly provided on the top of the height-limiting slider; In different height-limiting guide rails, the height of the height adjustment plate in the vertical direction is different; After any one of the height-limiting guide rails cooperates with the half-mold mechanism, the side surface of the height-adjusting plate facing the compression molding cavity is flush with the outer end surface.

6. The thickness-adjustable thermoplastic composite material molding die for a ship hull according to claim 5, characterized in that: The front and rear ends of the height adjustment plate are provided with height limiting baffles protruding to one side; After any one of the height-limiting guide rails is matched with the half-mold mechanism, the bottom surface of the height-limiting baffle is connected with the top surface of the upper baffle of the half-mold mechanism.

7. The thickness-adjustable thermoplastic composite material molding die for a ship hull according to claim 2, characterized in that: The clamping portion includes an L-shaped clamping plate, an adjustment slide rail is fixedly provided on the side of the L-shaped clamping plate facing the upper mold body, and a slide groove extending in the left and right directions is provided inside the upper mold body for slidingly cooperating with the adjustment slide rail.

8. The thickness-adjustable thermoplastic composite material molding die for a ship hull according to claim 2, characterized in that: The half mold mechanism is provided with a lower mold through hole which penetrates along the front-back direction, and the upper mold body is provided with an upper mold through hole which penetrates along the front-back direction.

9. A method for compression molding a ship hull thermoplastic composite material with adjustable thickness, which is implemented based on the compression mold for the ship hull thermoplastic composite material with adjustable thickness according to any one of claims 2 to 8, characterized in that: The following steps are involved: Step 1: Select a width-limiting guide rail of corresponding width and a height-limiting guide rail of corresponding height according to the size of the typical hull structural part to be formed, and assemble them with two half-mold mechanisms to form a complete lower mold. After assembly, the outer end surface of the lower mold is adapted to the outer wall surface of the typical hull structural part to be formed; Step 2: placing the cut thermoplastic resin-based composite material prepreg slices on the outer end surface of the lower mold, and spot welding the edges of the thermoplastic resin-based composite material prepreg slices to the outer end surface to form a thermoplastic resin-based composite material preform; Step 3: The hydraulic press controls the upper mold to descend so that the left side, bottom side, and right side of the upper mold are pressed against the thermoplastic resin-based composite material preform, while the hydraulic press applies a preset downward pressure; Step 4: starting the heating tube to heat the thermoplastic resin-based composite material preform; Step 5: After the heating temperature reaches the set value and stabilizes, the temperature and the preset pressure are maintained unchanged to perform molding and pressure holding; Step 6: After the molding and holding pressure phase is completed, the heating pipe is turned off to maintain the preset pressure, and cooling water is introduced into the parallel cooling water pipe to cool the mold; Step 7: When the temperature drops to the cooling set value, the hydraulic press gradually releases pressure and continues to cool until cooling is completed; Step 8: The hydraulic press controls the upper mold to rise to realize demoulding.

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