Preparation method and device of multi-dimensional structure formed part

Abstract

The invention provides a preparation method and device of a multi-dimensional structure formed part. The preparation method of the multi-dimensional structure molded part comprises the following steps: impregnating a fiber material and a supporting material in a preset proportion in a gum dipping part under a first preset condition to obtain a prefabricated body; sequentially introducing the preforms into a preset number of preforming parts to obtain preforms; and introducing the preformed body into a forming mold, extruding and curing to obtain a formed part. According to the preparation method of the multi-dimensional structure formed part, after a fiber material and a supporting material are impregnated with resin, a prefabricated body is obtained, the prefabricated body is sequentially pulled to a preset number of pre-forming parts, a prefabricated body is obtained, and the pre-forming parts are molds with the shape of a forming cavity close to that of the formed part; and the preformed body is pulled into a forming mold, extrusion curing is conducted, the integrally-formed multi-dimensional structure forming part is prepared, the forming part is integrally formed, splicing is not needed, no connection weak structure exists correspondingly, and the component structure connection requirement for high mechanical bonding strength can be met.

Description

Technical Field

[0001] The present disclosure relates to the technical field of multi-dimensional structured molded parts, and in particular to a preparation method and device for multi-dimensional structured molded parts. Background Art

[0002] Traditional molding, extrusion molding, rotational molding and other technical methods are limited by current equipment conditions, material properties and other limitations, and can only produce multi-dimensional complex structural products through multi-segment and multi-node splicing. It is impossible to achieve online continuous production of multi-dimensional structural complex components and products, and it is no longer able to meet the current requirements of key connection structure connection strength and multi-dimensional structure shape conformity in the fields of aerospace, high-rise building construction, automobiles and energy. Summary of the invention

[0003] In order to solve the problems existing in the related art, the present disclosure provides a method and device for preparing a multi-dimensional structure molded part.

[0004] According to a first aspect of an embodiment of the present disclosure, there is provided a method for preparing a multi-dimensional structure molded part, comprising:

[0005] impregnating a fiber material and a support material in a preset ratio with resin in a dipping section under a first preset condition to obtain a preform;

[0006] sequentially introducing the preform into a preset number of preforming parts to obtain a preform;

[0007] The preform is introduced into a molding die, extruded and solidified to obtain a molded part.

[0008] In some embodiments of the present disclosure, the preform is introduced into a molding die, extruded and solidified to obtain a molded part, comprising:

[0009] The preform is introduced into the molding die, and the molding die is rotated at a preset angle with the length direction as the axis, so that the cross section of the preform in the molding die is rotated at a preset angle;

[0010] The preform is extruded from the molding die and solidified to obtain the molded product.

[0011] In some embodiments of the present disclosure, the preset angle is 80°-115°.

[0012] In some embodiments of the present disclosure, the step of extruding the preform from the molding die and solidifying the preform to obtain the molded part comprises:

[0013] Extruding the preform from the forming die into an extruded body, and adjusting the curvature of the extruded body in the length direction by an angle adjustment portion at the extrusion end under a second preset condition; the angle θ of the angle adjustment portion has an adjustment range of 0-20°;

[0014] UV curing is performed under the third preset condition to obtain the molded part.

[0015] In some embodiments of the present disclosure, the second preset condition includes:

[0016] The extrusion speed V of the extrudate is 0.5-10 m / min, the extrusion time t of the extrudate is 0.2-20 min, and the angle θ, the length L of the extrudate, the extrusion speed V and the extrusion time t satisfy θ=(1.2Vt+0.5Vt 2 ) / (2000L);

[0017] The third preset condition includes:

[0018] The intensity of the ultraviolet light is 400-1200 W / inch; the irradiation time is 0.5-5 min; and the distance between the ultraviolet light and the molded part is 5-28 mm.

[0019] In some embodiments of the present disclosure, the preset ratio includes (8-15): (85-92);

[0020] The first preset conditions include: the immersion time is 2-10 minutes, and the immersion temperature is 50-120°C.

[0021] In some embodiments of the present disclosure, the preset number is greater than or equal to 2.

[0022] In some embodiments of the present disclosure, the resin includes a light-curable resin;

[0023] The photocurable resin includes at least one of unsaturated polyester, epoxy acrylate, polyurethane acrylate, polyester acrylate or epoxy resin.

[0024] In some embodiments of the present disclosure, the fiber material includes fiber yarn and fiber fabric; the fiber yarn includes glass fiber yarn and / or carbon fiber yarn; the fiber fabric includes glass fiber fabric and / or carbon fiber fabric;

[0025] The supporting material includes at least one of polyurethane, polyethylene terephthalate and polyvinyl chloride.

[0026] According to a second aspect of an embodiment of the present disclosure, a device for preparing a multi-dimensional structured molded part is provided, wherein the device for preparing a multi-dimensional structured molded part is used to implement the method for preparing the multi-dimensional structured molded part; the device for preparing a multi-dimensional structured molded part comprises:

[0027] A resin impregnation section, wherein resin is provided in the resin impregnation section, and the resin impregnation section is used to impregnate fiber material and support material in a preset ratio with resin under a first preset condition to obtain a preform;

[0028] A preset number of preforming parts, wherein the preforms are sequentially introduced into the preset number of preforming parts to obtain preforms;

[0029] The molding die is used to introduce the preform into the molding die, extrude and solidify it, and obtain a molded part.

[0030] The beneficial effects of the present disclosure include but are not limited to: in the preparation method of the multi-dimensional structural molded part provided by the present disclosure, after the fiber material and the supporting material in a preset proportion are impregnated with resin, a preform is obtained, and the preform is sequentially pulled to a preset number of pre-forming parts to obtain a preform, and the pre-forming part is a mold with a molding cavity whose shape is close to that of the molded part; the preform is pulled into the molding mold, extruded and cured to prepare an integrally molded multi-dimensional structural molded part, which is integrally molded without the need for splicing of multiple sections or multiple nodes, and has no corresponding connected weak structure, so it has higher mechanical strength and can meet the structural connection requirements of components with high mechanical bonding strength requirements.

[0031] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings incorporated into the specification and constituting a part of the specification illustrate embodiments of the present disclosure and are used together with the description to explain the principles of the embodiments of the present disclosure. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present disclosure, rather than all embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is a schematic flow chart of a method for preparing a multi-dimensional structure molded part according to an exemplary embodiment of the present disclosure;

[0034] Figure 2 A schematic flow chart of a method for preparing a multi-dimensional structure molded part according to another exemplary embodiment of the present disclosure;

[0035] Figure 3 is a schematic diagram of a molded part according to an exemplary embodiment of the present disclosure;

[0036] Figure 4 A schematic flow chart of a method for preparing a multi-dimensional structure molded part according to another exemplary embodiment of the present disclosure;

[0037] Figure 5 is a schematic diagram of a molding according to another exemplary embodiment of the present disclosure;

[0038] Figure 6 The present invention is a schematic flow chart of a method for preparing a multi-dimensional structured molded part implemented by a preparation device for a multi-dimensional structured molded part according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present disclosure clearer, the technical solution of the present disclosure will be clearly and completely described in combination with the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be arbitrarily combined with each other without conflict.

[0040] Traditional molding, extrusion molding, rotational molding and other technical methods are limited by current equipment conditions, material properties and other limitations, and can only produce multi-dimensional complex structural products through multi-segment and multi-node splicing. It is impossible to achieve online continuous production of multi-dimensional structural complex components and products, and it is no longer able to meet the current requirements of key connection structure connection strength and multi-dimensional structure shape conformity in the fields of aerospace, high-rise building construction, automobiles and energy.

[0041] In order to solve the above technical problems, the present disclosure provides a method for preparing a multi-dimensional structural molded part, according to which fiber material and supporting material in a preset proportion can be impregnated with resin to obtain a preform, and the preform is sequentially pulled to a preset number of preforming parts to obtain a preform, wherein the preform is a mold having a molding cavity with a shape close to that of the molded part; the preform is pulled into the molding mold, extruded and cured to prepare an integrally molded multi-dimensional structural molded part, which is integrally molded without the need for splicing of multiple sections or multiple nodes, and has no corresponding connected weak structure, and therefore has higher mechanical strength and can meet the structural connection requirements of components with high mechanical bonding strength requirements.

[0042] An exemplary embodiment of the present disclosure provides a method for preparing a multi-dimensional structured molded part, such as Figure 1 As shown, including:

[0043] S100, impregnating a fiber material and a support material in a preset ratio with resin in a dipping unit under a first preset condition to obtain a preform;

[0044] S200, sequentially introducing the preform into a preset number of preforming parts to obtain a preform;

[0045] S300, introducing the preform into a molding die, extruding and curing, and obtaining a molded part.

[0046] In the preparation method of the multi-dimensional structural molded parts provided by the above exemplary embodiment of the present disclosure, after the fiber material and the supporting material in a preset proportion are impregnated with resin, a preform is obtained, and the preform is sequentially pulled to a preset number of pre-forming parts to obtain a preform, and the pre-forming part is a mold with a molding cavity whose shape is close to that of the molded part; the preform is pulled into the molding mold, extruded and cured to prepare an integrally molded multi-dimensional structural molded part, which is integrally molded without the need for splicing of multiple sections or multiple nodes, and has no corresponding connected weak structure, so it has higher mechanical strength and can meet the structural connection requirements of components with high mechanical bonding strength requirements.

[0047] Exemplarily, the preset ratio of the fiber material to the support material may be (8-15):(85-92). The fiber material and the support material having the preset ratio of (8-15):(85-92) are impregnated with resin in the impregnation section, and after the subsequent molding and curing processes, the obtained molded part can ensure both its mechanical strength and its structural continuity.

[0048] In an exemplary embodiment, the preform is introduced into a molding die, extruded and solidified to obtain a molded part, such as Figure 2 As shown, including:

[0049] S301, introducing the preform into a forming mold, and rotating the forming mold at a preset angle with the length direction as the axis, so that the cross section of the preform in the forming mold is rotated at a preset angle;

[0050] S302, extruding the preform from the forming mold and solidifying it to obtain a formed part.

[0051] Exemplarily, the molding die can be rotated at a preset angle with the length direction as the axis, and each surface of the molding die can be rotated at a preset angle with the length direction as the axis at the same time, so that the cross section of the preform in the molding die is rotated at a preset angle; or one or several surfaces of the molding die can be rotated at a preset angle with the length direction as the axis, and the other surfaces are not rotated, so that the cross section of the preform in the molding die changes accordingly. For example, when the preform is being molded in the molding die, the bottom surface of the molding die can be rotated, so that the cross section of the preform in the molding die changes accordingly, so that the prepared molding can achieve continuous change of the cross-sectional angle in the length direction to meet the application requirements of the molding, such as the requirements of multi-dimensional structural products in the fields of aerospace launchers, pipes for high-rise buildings, automobiles and energy.

[0052] Exemplarily, the molding die is rotated at a preset angle with the longitudinal direction as the axis, so that the preform in the molding die is rotated at a preset angle. Accordingly, Figure 3 As shown in , the prepared molded part 10 is rotated at a preset angle with the length direction as the axis, so that the cross section of the molded part 10 changes accordingly, meeting a wider range of application requirements of the molded part.

[0053] In the above exemplary embodiment, in S200, after the preform is introduced into a preset number of preforming parts in sequence, a preform is obtained, and the preform has a shape close to that of the molded part. In S300, the preform is introduced into a molding die, and the molding die is rotated at a preset angle with the length direction as the axis. In this process, the cross section of one or several faces of the preform in the molding die is correspondingly rotated at a preset angle, so as to realize the continuous change of the cross section of the preform in the length direction. After the preform is extruded from the molding die and solidified, a molded part with a continuously changing cross section in the length direction and formed in one piece can be obtained accordingly. In an exemplary embodiment, the preset angle is 80°-115°.

[0054] The molding die can be rotated at a preset angle of 80°-115° with the length direction as the axis, and each surface of the molding die can be rotated at a preset angle of 80°-115° with the length direction as the axis at the same time, so that the cross section of the preform in the molding die is rotated at a preset angle of 80°-115°; or one or several surfaces of the molding die can be rotated at a preset angle of 80°-115° with the length direction as the axis, and the other surfaces are not rotated, so that the cross section of the preform in the molding die changes accordingly. For example, when the preform is being molded in the molding die, the bottom surface of the molding die can be rotated at a preset angle of 80°-115°, so that the cross section of the preform in the molding die changes accordingly, and after the preform is extruded from the molding die and solidified, a molded part with a continuously changing cross section in the length direction and an integral molded part can be obtained accordingly, so as to meet the application requirements of the molded part, such as the connection strength of key connection structures in aerospace launchers, pipelines for high-rise buildings, automobiles and energy, and the shape conformability of multi-dimensional structures.

[0055] In an exemplary embodiment, the preform is extruded from a forming mold and solidified to obtain a formed part, such as Figure 4 As shown, including:

[0056] S3021, extruding the preform from the forming die into an extruded body, and adjusting the curvature of the extruded body in the length direction through an angle adjustment portion at the extrusion end under a second preset condition; the angle θ of the angle adjustment portion has an adjustment range of 0-20°;

[0057] S3022. Perform UV curing under the third preset condition to obtain a molded part.

[0058] For example, the angle adjustment part may be an angle adjuster provided at the extrusion end of the molding die, through which the extrusion end may be lifted up or pressed down when the preform is extruded from the molding die to form an extrusion body, so as to achieve a continuous curvature change of the extrusion body in the length direction. Figure 5 As shown in FIG. 1 , the curvature of the produced molded part 10 in the length direction changes.

[0059] In this embodiment, while the curvature of the extruded body in the length direction is adjusted by the angle adjustment portion, the extruded body is rapidly cured by ultraviolet light under the third preset condition to obtain an integrally cured molded part, in which not only the cross-section in the length direction changes, but also the curvature in the length direction changes.

[0060] The angle θ of the angle adjustment part has an adjustment range of 0-20°, that is, when the preform is extruded from the molding die into an extrudate, the angle adjustment part lifts or presses the extrudate at the extrusion end up or down by 0-20°, thereby achieving a continuous curvature change of the extrudate in the length direction.

[0061] In an exemplary embodiment, the method for preparing a multi-dimensional structural molded part further includes pulling the molded part to a cutting machine and cutting it according to length requirements.

[0062] In an exemplary embodiment, the second preset condition includes: the extrusion speed V of the extrusion body is 0.5-10 m / min, the extrusion time t of the extrusion body is 0.2-20 min, the angle θ, the length L of the extrusion body, the extrusion speed V and the extrusion time t satisfy θ=(1.2Vt+0.5Vt 2 ) / (2000L).

[0063] In the above S3021, the preform is extruded from the forming die into an extrusion body, wherein the extrusion speed V of the extrusion body is 0.5-10 m / min, the extrusion time t of the extrusion body is 0.2-20 min, and the angle θ, the length L of the extrusion body, the extrusion speed V and the extrusion time t satisfy θ=(1.2Vt+0.5Vt 2 ) / (2000L), under the relationship between the angle θ, the length L of the extrudate, the extrusion speed V and the extrusion time t, it can be ensured that the extrudate produces an appropriate curvature at an appropriate extrusion speed, avoiding the extrusion speed of the extrudate being too slow or the curvature changing too fast to affect the structure and mechanical strength of the molded part.

[0064] In an exemplary embodiment, the third preset condition includes: the intensity of the ultraviolet light is 400-1200W / inch; the irradiation time is 0.5-5min; the distance between the ultraviolet light and the molded part is 5-28mm. While adjusting the curvature of the extrusion in the length direction through the angle adjustment part, the extrusion is rapidly cured by ultraviolet light under the conditions of the intensity of the ultraviolet light being 400-1200W / inch, the irradiation time being 0.5-5min, and the distance between the ultraviolet light and the molded part being 5-28mm, to obtain an integrally cured molded part, which can ensure that the extrusion can be cured and molded while being extruded under ultraviolet light irradiation, and avoid the extrusion being uncured or overcured to affect the mechanical strength of the molded part.

[0065] In an exemplary embodiment, the preset ratio includes (8-15): (85-92); the first preset condition includes: the immersion time is 2-10 minutes, and the immersion temperature is 50-120°C.

[0066] The fiber material and the support material in a preset ratio of (8-15): (85-92) are impregnated with resin in the impregnation section at an impregnation temperature of 50-120°C for 2-10 minutes to obtain a preform. At an impregnation temperature of 50-120°C, the resin can be fully melted to facilitate the impregnation of the fiber material and the support material. At an impregnation time of 2-10 minutes, the resin can be fully and evenly impregnated with the fiber material and the support material to ensure the material uniformity of the subsequently prepared molded part. At a preset ratio of (8-15): (85-92) for the fiber material and the support material, the mechanical strength and continuity of the prepared molded part can be ensured.

[0067] In an exemplary embodiment, the fiber material includes fiber yarn and fiber fabric; the fiber yarn includes glass fiber yarn and / or carbon fiber yarn; the fiber fabric includes glass fiber fabric and / or carbon fiber fabric. The supporting material includes at least one of polyurethane, polyethylene terephthalate and polyvinyl chloride.

[0068] The fiber yarn, fiber fabric and support material are impregnated with resin for 2-10 minutes at an impregnation temperature of 50-120° C. to obtain a preform. The fiber yarn includes glass fiber yarn and / or carbon fiber yarn. Exemplarily, when the fiber yarn includes glass fiber yarn, the glass fiber yarn can be a glass fiber yarn with a modulus of 80-100 GPa. The fiber fabric includes glass fiber fabric and / or carbon fiber fabric. Exemplarily, the fiber fabric can be a triaxial fabric with a weight of 700-1600 grams. The fiber material provides strength and continuity in the length direction for the molded part. The support material can be in the form of a foam core material, for example, it can be at least one of polyurethane foam, polyethylene terephthalate foam and polyvinyl chloride foam. The support material provides support for the molded part and can change the shape and curvature of the cross section of the molded part during the preparation process.

[0069] In an exemplary embodiment, the preset number is greater than or equal to 2.

[0070] The preform is sequentially introduced into a preset number of preforming parts to obtain a preform, wherein the preform is a mold whose shape of the molding cavity is close to that of the molded part, and the preset number of preforming parts is greater than or equal to 2, that is, the preform is sequentially introduced into 2 or more preforming parts to obtain a preform. The shape of the molding cavity of each preforming part can gradually approach the shape of the molded part. For example, when the preset number of preforming parts is 3, the order of the three preforming parts in the process flow is preforming part a, preforming part b and preforming part c, respectively. Then, the shape of the molding cavity of preforming part a, preforming part b and preforming part c tends to be more similar to the shape of the molded part, that is, when the preform is sequentially introduced into preforming part a, preforming part b and preforming part c, the preform gradually transitions to a shape closer to the molded part to obtain a preform, so that the preform initially has the shape of the molded part.

[0071] In an exemplary embodiment, the resin includes a photocurable resin; the photocurable resin includes at least one of unsaturated polyester, epoxy acrylate, polyurethane acrylate, polyester acrylate or epoxy resin.

[0072] In this embodiment, the resin impregnated with the fiber material and the support material may be a light-curable resin, for example, at least one of unsaturated polyester, epoxy acrylate, polyurethane acrylate, polyester acrylate or epoxy resin. The light-curable resin can be selected to achieve that when the preform is extruded from the molding die into an extruded body, the extruded body can be quickly cured under ultraviolet light to obtain an integrally cured molded part.

[0073] An exemplary embodiment of the present disclosure provides a device for preparing a multi-dimensional structure molded part, and the device for preparing a multi-dimensional structure molded part is used to implement the above-mentioned method for preparing a multi-dimensional structure molded part; the device for preparing a multi-dimensional structure molded part comprises a resin impregnation part, a preset number of preforming parts, and a forming mold. Among them, the resin impregnation part is provided with resin, and the resin impregnation part is used to impregnate the fiber material and the supporting material of the preset proportion with the resin under the first preset condition to obtain a preform; the preforming part is used to introduce the preform into the preset number of preforming parts in sequence to obtain a preform; the forming mold is used to introduce the preform into the forming mold, extrude and solidify, and obtain a molded part.

[0074] The preparation device of the multi-dimensional structural molded part provided in this embodiment is used to implement the preparation method of the above-mentioned multi-dimensional structural molded part. After the fiber material and the supporting material in a preset proportion are impregnated with resin, a preform is obtained, and the preform is introduced into a preset number of pre-forming parts in sequence to obtain a preform, and the pre-forming part is a mold with a molding cavity whose shape is close to that of the molded part; the preform is introduced into the molding mold, extruded and cured, and an integrally formed multi-dimensional structural molded part is prepared. The molded part is integrally formed without the need for multi-segment or multi-node splicing, and there is no corresponding connection weak structure, so it has high mechanical strength and can meet the structural connection requirements of components with high mechanical bonding strength requirements.

[0075] In an exemplary embodiment, the preparation device of the multi-dimensional structure molded part also includes an ultraviolet light irradiation unit, which is arranged at the extrusion end of the molding die, and is used to quickly solidify the extruded body extruded from the extrusion end of the molding die to obtain an integrally cured molded part.

[0076] In an exemplary embodiment, the preparation device of the multi-dimensional structural molded part also includes an angle adjustment part, which is arranged at the extrusion end of the molding die and is used to adjust the curvature of the extruded body extruded from the extrusion end of the molding die in the length direction, thereby realizing a continuous curvature change of the molded part in the length direction.

[0077] In order to more clearly explain the technical solution of the present disclosure, a specific example of a method for preparing a multi-dimensional structured molded part provided by an exemplary embodiment of the present disclosure is implemented according to an apparatus for preparing a multi-dimensional structured molded part provided by an exemplary embodiment of the present disclosure.

[0078] Combination Figure 6 As shown:

[0079] impregnating a fiber material and a support material in a preset ratio with resin in a dipping section under a first preset condition to obtain a preform;

[0080] The preform is introduced into the preform part a, the preform part b and the preform part c in sequence to obtain a preform;

[0081] The preform is introduced into a forming die, and the forming die is rotated at a preset angle with the length direction as the axis, so that the cross section of the preform in the forming die is rotated at a preset angle;

[0082] The preform is extruded from a molding die to obtain an extruded body, the curvature of the extruded body in the length direction is adjusted by an angle adjustment portion at the extrusion end, ultraviolet light is cured by an ultraviolet light irradiation portion under a third preset condition to obtain a molded part, the molded part is pulled to a cutting machine, and cut according to the length requirement.

[0083] The molded parts prepared in the above examples are multi-dimensional structures that are integrally molded and do not require multiple sections or multiple nodes for splicing. Correspondingly, there are no weak connection structures. Therefore, they have high mechanical strength and can achieve continuous changes in curvature and cross-sectional angles in the length direction. They can meet the structural connection requirements of components with high mechanical bonding strength requirements, such as the connection strength of key connection structures in the fields of aerospace, high-rise building construction, automobiles, and energy, and the shape conformability of multi-dimensional structures.

[0084] The contents described above may be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present disclosure.

[0085] Finally, it should be noted that in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0086] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A method for preparing a multi-dimensional structured molded part, characterized in that: include: Impregnating a fiber material and a support material in a preset ratio with resin in a first preset condition in an impregnation section to obtain a preform; sequentially introducing the preform into a preset number of preforming parts to obtain a preform; The preform is introduced into a molding die, extruded and solidified to obtain a molded part.

2. The method for preparing a multi-dimensional structure molded part according to claim 1, characterized in that: The preform is introduced into a molding die, extruded and solidified to obtain a molded part, comprising: The preform is introduced into the molding die, and the molding die is rotated at a preset angle with the length direction as the axis, so that the cross section of the preform in the molding die is rotated at a preset angle; The preform is extruded from the molding die and solidified to obtain the molded product.

3. The method for preparing a multi-dimensional structure molded part according to claim 2, characterized in that: The preset angle is 80°-115°.

4. The method for preparing a multi-dimensional structure molded part according to claim 2, characterized in that: The step of extruding the preform from the forming die and solidifying the preform to obtain the formed part comprises: Extruding the preform from the forming die into an extruded body, and adjusting the curvature of the extruded body in the length direction by an angle adjustment portion at the extrusion end under a second preset condition; the angle θ of the angle adjustment portion has an adjustment range of 0-20°; UV curing is performed under the third preset condition to obtain the molded part.

5. The method for preparing a multi-dimensional structure molded part according to claim 4, characterized in that: The second precondition includes: The extrusion speed V of the extrudate is 0.5-10 m / min, the extrusion time t of the extrudate is 0.2-20 min, and the angle θ, the length L of the extrudate, the extrusion speed V and the extrusion time t satisfy θ=(1.2Vt+0.5Vt 2 ) / (2000L); The third preset condition includes: The intensity of the ultraviolet light is 400-1200 W / inch; the irradiation time is 0.5-5 min; and the distance between the ultraviolet light and the molded part is 5-28 mm.

6. The method for preparing a multi-dimensional structure molded part according to claim 1, characterized in that: The preset ratios include (8-15): (85-92); The first preset conditions include: the immersion time is 2-10 minutes, and the immersion temperature is 50-120°C.

7. The method for preparing a multi-dimensional structured molded part according to claim 1, characterized in that: The preset number is greater than or equal to 2.

8. The method for preparing a multi-dimensional structure molded part according to claim 1, characterized in that: The resin includes a light-curable resin; The photocurable resin includes at least one of unsaturated polyester, epoxy acrylate, polyurethane acrylate, polyester acrylate or epoxy resin.

9. The method for preparing a multi-dimensional structure molded part according to claim 1, characterized in that: The fiber material includes fiber yarn and fiber fabric; the fiber yarn includes glass fiber yarn and / or carbon fiber yarn; the fiber fabric includes glass fiber fabric and / or carbon fiber fabric; The supporting material includes at least one of polyurethane, polyethylene terephthalate and polyvinyl chloride.

10. A device for preparing a multi-dimensional structured molded part, characterized in that: The device for preparing the multi-dimensional structured formed part is used to implement the method for preparing the multi-dimensional structured formed part according to any one of claims 1 to 9; The preparation device of the multi-dimensional structure molded part comprises: A resin impregnation section, wherein resin is disposed in the resin impregnation section, and the resin impregnation section is used to impregnate fiber material and support material in a preset ratio with resin under a first preset condition to obtain a preform; A preset number of preforming parts, wherein the preforms are sequentially introduced into the preset number of preforming parts to obtain preforms; The molding die is used to introduce the preform into the molding die, extrude and solidify it, and obtain a molded part.

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