Die and process for hot-press injection molding integral forming of carbon fiber product

Abstract

The invention provides a mold and process for hot-press injection molding integrated molding of a carbon fiber product, and belongs to the technical field of hot-press injection molding integrated molding.The mold comprises a bottom mold structure, a top mold structure and a piston type material injection assembly, the bottom mold structure and the top mold structure are assembled to form a first mold cavity, and a transverse sliding structure is arranged on the top mold structure; and after the bottom die structure and the top die structure are assembled, the transverse sliding structure slides towards one side or two sides. According to the injection mold, the transverse sliding structure is designed and slides towards one side or two sides after the bottom mold structure and the top mold structure are closed, so that the buckle component injection molding cavity communicating with the first mold cavity is formed in the inner side of the transverse sliding structure, and the piston type injection assembly is used for injecting a molding material into the buckle component injection molding cavity; according to the process, the carbon fiber main body face and the buckle component are good in forming integrality and high in structural strength, only one-time mold opening is needed in the process, the steps of mold opening and closing and intermediate product transferring are omitted, and the machining efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of hot-pressing and injection-molding integrated molding, and in particular to a mold and a process for hot-pressing and injection-molding integrated molding of carbon fiber products. Background Art

[0002] Carbon fiber hot pressing is an advanced manufacturing technology that uses high temperature and high pressure to composite carbon fiber materials with a resin matrix. It is widely used in aerospace, automobile manufacturing, and sporting goods. When used in automobile engine hood structures, it can meet the structural strength requirements and reduce the weight of the entire vehicle, which plays a positive role in promoting the development of new energy vehicles.

[0003] The carbon fiber component includes a carbon fiber main body surface and a snap-on component for snap connection. The traditional method usually adopts two processes for manufacturing, firstly hot pressing the pre-impregnated carbon fiber, and then injection molding the snap-on component on the inner side of the carbon fiber molded part or gluing the snap-on component on the inner side of the carbon fiber molded part. This process has two shortcomings: first, the structural strength of the snap-on structure of the carbon fiber component manufactured by the two processes is insufficient, and there may be a problem of breakage with the carbon fiber main body surface; second, the production steps of the two processes are cumbersome and the processing efficiency is low. For this reason, the present invention provides a mold and process for hot pressing and injection molding of carbon fiber products. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a mold and process for hot pressing and injection molding of carbon fiber products, which solves the problems of insufficient structural strength of the snap-in structure of the carbon fiber components manufactured in the traditional two-step process, possible breakage of the carbon fiber main body surface, and cumbersome production and manufacturing steps and low processing efficiency.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A mold for hot-pressing and injection-molding one-piece carbon fiber products, comprising a bottom mold structure, a top mold structure and a piston-type injection assembly, wherein the bottom mold structure and the top mold structure are molded together to form a first mold cavity, and a transverse sliding structure is provided on the top mold structure, and after the bottom mold structure and the top mold structure are molded together, the transverse sliding structure slides to one side or both sides, thereby forming a buckle component injection cavity connected to the first mold cavity on the inner side of the transverse sliding structure;

[0007] The piston type injection assembly is used to inject molding material into the injection cavity of the buckle component.

[0008] Preferably, it further includes: a frame and a hydraulic driving member. The frame is in a "C" shape. The bottom die structure is fixedly installed at the inner bottom of the frame. The top end of the hydraulic driving member is fixedly installed at the inner top of the frame. The telescopic end of the hydraulic driving member is fixedly installed with the top die structure.

[0009] Preferably, the top die structure includes:

[0010] An upper mounting body. A guiding component is arranged between the upper mounting body and the bottom die structure;

[0011] A middle mounting body. The middle mounting body is fixedly installed at the bottom of the upper mounting body, and both sides of the middle mounting body have side plates;

[0012] A lower mounting body. The lower mounting body is fixedly installed at the bottom of the side plates of the middle mounting body. An installation area is formed between the lower mounting body and the middle mounting body;

[0013] A model block. The model block is fixedly installed at the bottom of the lower mounting body;

[0014] The horizontal sliding structure includes: a sliding diaphragm, a sliding frame, and an electromagnetic block. The sliding diaphragm is slidably connected to the bottom of the lower mounting body, and the sliding diaphragm is attached to the outside of the model block. The sliding frame is slidably connected to the top of the lower mounting body, and one end of the sliding frame is fixedly connected to the sliding diaphragm. The electromagnetic block is fixedly installed at the top of the middle mounting body, and a permanent magnet part corresponding to the electromagnetic block is arranged at the end of the sliding frame.

[0015] Preferably, the model block includes:

[0016] A middle model. A vertical sliding hole is formed at the top of the lower mounting body. The middle model includes a trapezoidal block integrally arranged and a sliding vertical plate at the top of the trapezoidal block. The sliding vertical plate of the middle model is slidably installed in the vertical sliding hole;

[0017] A side model. Buckle grooves are arranged on both sides of the bottom of the lower mounting body and at the positions of the vertical sliding holes. The side model is movably installed at the buckle groove positions through a single-link structure;

[0018] Horizontal sliding grooves are arranged on the bottom of the lower mounting body and outside the buckle grooves. The sliding diaphragm is slidably matched with the horizontal sliding grooves, and the sliding diaphragm is arranged outside the side model;

[0019] Installation openings are arranged at both ends of the sliding vertical plate of the middle model. Transmission rods are fixedly installed at the installation openings. A wedge-shaped matching structure is arranged between the transmission rods and the sliding frame;

[0020] When the sliding frame is in a contracted state, the wedge-shaped matching structure makes the sliding vertical plate of the middle model slide to the upper dead point;

[0021] When the sliding frame is in the extended state, the sliding upright plate of the middle model has space to slide downward;

[0022] The wedge-shaped matching structure includes: a first inclined portion provided on the sliding frame and a second inclined portion provided on the transmission rod.

[0023] Preferably, a limiting pin is fixedly installed at the bottom of the horizontal sliding groove;

[0024] The sliding diaphragm comprises: a main body, a sliding groove is provided on the top of the main body, the limiting pin is located inside the sliding groove, and a notch is provided at one end of the main body;

[0025] A forming piece is fixedly connected at the bottom of the horizontal sliding groove and at a position corresponding to the notch.

[0026] Preferably, the molded part includes: an outer contour molded part and a hole molded part.

[0027] Preferably, a connecting cavity is provided on the top of the side mold, and a first connecting ear is fixedly connected inside the connecting cavity;

[0028] A second connecting ear is fixedly connected to the bottom of the buckle groove;

[0029] The first end of the single-link structure is movably connected to the first connecting ear, and the second end of the single-link structure is movably connected to the second connecting ear.

[0030] Preferably, the bottom mold structure comprises:

[0031] The bottom template, the guide assembly includes: a guide column mother component fixedly mounted on the bottom template and a guide column male component fixedly mounted on the upper frame, the guide column mother component and the guide column male component are slidably matched;

[0032] A heating base, the heating base is fixedly installed on the top of the bottom template;

[0033] A bottom mold body, wherein the bottom mold body is fixedly mounted on the top of the heating base, a sealed heating oil cavity is formed between the heating base and the bottom mold body, a bottom mold cavity is arranged on the top of the bottom mold body, an injection port is opened on the inner side of the bottom mold cavity, the injection port corresponds to the injection cavity of the buckle component, and a side sliding port is arranged on the side of the bottom mold cavity;

[0034] It also includes: a heating / cooling oil supply system, which circulates oil supply to the heating oil chamber.

[0035] Preferably, the piston injection assembly comprises:

[0036] A piston assembly, wherein a heating assembly is disposed on the outer side of the piston assembly;

[0037] A transverse spiral conveying cylinder, wherein the transverse spiral conveying cylinder is fixedly connected to the bottom mold structure through a mounting frame, a discharge end of the transverse spiral conveying cylinder is connected to the first end of the piston assembly through a guide channel, and a feed bin is provided at the feed end of the transverse spiral conveying cylinder;

[0038] A branch pipe, wherein the first end of the branch pipe is connected to the second end of the piston assembly, the second end of the branch pipe is connected to the bottom mold structure, and a heat preservation kit is arranged on the outer side of the branch pipe;

[0039] The piston assembly comprises: a piston cylinder, a piston rod, and an electric cylinder. The piston cylinder and the electric cylinder are fixedly connected to the bottom mold structure, the piston rod cooperates with the piston cylinder, and the action end of the electric cylinder is fixedly connected to the piston rod through a connecting frame;

[0040] Among them, the piston rod member includes: a long rod member, a sealing member is slidably connected to the side of the long rod member, the sealing member is fixedly installed with the port of the piston cylinder, the end of the long rod member is fixedly connected with a piston disk, the piston disk divides the interior of the piston cylinder into a heating chamber and an extrusion chamber, a through hole is opened at the end of the piston disk, and a sealing end connecting member and a circulation end connecting member are respectively arranged on both sides of the through hole, the sealing end connecting member is close to the extrusion chamber, and the circulation end connecting member is close to the heating chamber, one end of the sealing end connecting member is provided with a tapered portion, the other end of the sealing end connecting member passes through the through hole and is fixedly installed with the circulation end connecting member, and the end of the circulation end connecting member is provided with a cylindrical protrusion.

[0041] Another object of the present invention is to provide a process for hot-pressing and injection molding one-piece carbon fiber products, using the above-mentioned mold for hot-pressing and injection molding one-piece carbon fiber products, specifically comprising the following steps:

[0042] S1. Putting the pre-impregnated carbon fiber fabric into the bottom mold cavity of the bottom mold structure when the bottom mold structure and the top mold structure are in an open mold state, closing the bottom mold structure and the top mold structure, and hot-pressing the pre-impregnated carbon fiber fabric by relying on the first mold cavity formed by closing the bottom mold structure and the top mold structure;

[0043] S2, the horizontal sliding structure slides to one side or both sides, and the inner side of the horizontal sliding structure forms a buckle component injection cavity connected to the first mold cavity, and the piston injection assembly is used to inject molding material into the buckle component injection cavity;

[0044] S3, cooling the molding, and taking out the molded carbon fiber product.

[0045] The present invention provides a mold and process for hot pressing and injection molding of carbon fiber products. It has the following beneficial effects:

[0046] 1. The present invention designs a transverse sliding structure, which slides to one side or both sides after the bottom mold structure and the top mold structure are molded together, thereby forming a snap component injection cavity connected to the first mold cavity on the inner side of the transverse sliding structure, and a piston injection assembly is used to inject molding material into the snap component injection cavity. This process makes the carbon fiber main body face and the snap component have good integration and high structural strength. Moreover, this process only requires one mold opening, eliminating the steps of opening and closing the mold and transferring the intermediate product, so that the processing efficiency is improved.

[0047] 2. The present invention, by designing a three-layer structure of an upper frame, a middle frame and a lower frame, forms an installation area between the lower frame and the middle frame, so as to adapt to the installation of a horizontal sliding structure, and designs the model blocks into a middle model and a side model. When the sliding frame is in a retracted state, the wedge-shaped matching structure enables the sliding vertical plate of the middle model to slide to the upper dead point, and the middle model cannot move up and down relative to the lower frame, and the side models are squeezed on both sides of the middle model, so that the side models cannot move relative to the lower frame. At this time, the model block of the top mold structure is stable, and the prepreg carbon fiber fabric can be hot-pressed. When the snap-fitting component is injected and the mold is opened, when the sliding frame is in an extended state, the sliding vertical plate of the middle model has space to slide downward. During the mold opening process, the lower frame moves upward, and is restricted by the snap-fitting component on the carbon fiber product. The middle model and the side models cannot move directly upward, and the sides of the middle model no longer squeeze the side models. The side models can be flipped inward to bypass the snap-fitting component, thereby successfully completing the mold opening action. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A stereoscopic diagram of a mold for hot-pressing and injection-molding one-piece molding of carbon fiber products proposed by the present invention;

[0049] Figure 2 This is a front view of a mold for hot-pressing and injection-molding one-piece molding of carbon fiber products proposed by the present invention;

[0050] Figure 3 A side view of a mold for hot-pressing and injection-molding one-piece carbon fiber product proposed by the present invention;

[0051] Figure 4 A top view of a mold for hot-pressing and injection-molding one-piece carbon fiber product proposed by the present invention;

[0052] Figure 5 It is a three-dimensional schematic diagram of a bottom mold structure of a mold for hot-pressing and injection-molding one-piece molding of carbon fiber products proposed by the present invention;

[0053] Figure 6A three-dimensional schematic diagram of a piston-type injection assembly of a mold for hot-pressing and injection-molding one-piece molding of carbon fiber products proposed by the present invention;

[0054] Figure 7 A three-dimensional schematic diagram of a piston-type injection assembly of a mold for hot-pressing and injection-molding one-piece molding of carbon fiber products proposed by the present invention;

[0055] Figure 8 A three-dimensional schematic diagram of a piston assembly of a mold for hot-pressing and injection-molding one-piece carbon fiber product proposed by the present invention;

[0056] Fig. 9 This is a schematic diagram of the cooperation between the sealing end connector and the flow end connector of a mold for hot-pressing and injection-molding one-piece carbon fiber products proposed by the present invention;

[0057] Fig.10 It is a three-dimensional schematic diagram of a top mold structure of a mold for hot-pressing and injection-molding one-piece molding of carbon fiber products proposed by the present invention;

[0058] Fig.11 It is a three-dimensional schematic diagram of the lower mold structure of a mold for hot-pressing and injection-molding one-piece molding of carbon fiber products proposed by the present invention;

[0059] Fig.12 It is a side perspective schematic diagram of a lower mold structure of a mold for hot-pressing and injection-molding one-piece molding of carbon fiber products proposed by the present invention;

[0060] Fig.13 for Fig.12 A partial enlarged view in the middle;

[0061] Fig.14 A schematic diagram of the movement direction of the lower mold structure of a mold for hot-pressing and injection-molding one-piece molding of carbon fiber products proposed by the present invention;

[0062] Fig.15 It is a three-dimensional schematic diagram of a lower frame of a mold for hot-pressing and injection-molding one-piece carbon fiber products proposed by the present invention;

[0063] Fig.16 It is a three-dimensional schematic diagram of a middle model of a mold for hot-pressing and injection-molding one-piece molding of carbon fiber products proposed by the present invention;

[0064] Fig.17 It is a three-dimensional schematic diagram of a side model of a mold for hot-pressing and injection-molding one-piece molding of carbon fiber products proposed by the present invention;

[0065] Fig.18 A three-dimensional schematic diagram of a sliding diaphragm of a mold for hot-pressing and injection-molding one-piece molding of carbon fiber products proposed by the present invention;

[0066] Fig.19 The present invention is a schematic diagram of the installation of a mold for hot pressing and injection molding of carbon fiber products.

[0067] Among them, 1. bottom mold structure; 101. bottom mold plate; 102. guide column mother part; 103. heating base; 104. bottom mold body; 104a. bottom mold cavity; 104b. injection port; 104c. side sliding port; 2. top mold structure; 201. upper frame; 202. guide column male part; 203. middle frame; 204. electromagnetic block; 205. lower frame; 205a. vertical sliding hole; 205b. buckle groove; 2 05c, horizontal sliding groove; 205d, limiting nail; 205e, forming part; 205e1, outer contour forming part; 205e2, hole forming part; 206, middle model; 206a, trapezoidal block; 206b, sliding vertical plate; 206c, installation port; 207, transmission rod; 208, sliding frame; 209, wedge-shaped matching structure; 209a, first oblique part; 209b, second oblique part; 2010, single connecting rod structure structure; 2011, side model; 2011a, connecting cavity; 2011b, first connecting ear; 2012, sliding diaphragm; 2012a, main body; 2012b, notch; 2012c, sliding groove; 3, hydraulic drive; 4, piston injection assembly; 401, branch pipe; 402, insulation kit; 403, piston assembly; 403a, electric cylinder; 403b, connecting frame; 403c, piston rod; 4 03c1, long rod; 403c2, sealing member; 403c3, piston disc; 403c4, through hole; 403c5, sealing end connector; 403c5a, tapered portion; 403c6, flow end connector; 403c7, cylindrical protrusion; 403d, piston cylinder; 404, heating component; 405, horizontally placed spiral conveying cylinder; 406, silo; 407, mounting frame; 5, frame; a, snap-fit ​​component injection molding cavity. DETAILED DESCRIPTION

[0068] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0069] Embodiment 1:

[0070] like Figure 1 - Fig.19As shown in the figure, an embodiment of the present invention provides a mold for the integrated thermocompression injection molding of carbon fiber products, which includes a bottom mold structure 1, a top mold structure 2, and a piston-type injection component 4. The bottom mold structure 1 and the top mold structure 2 are closed to form a first mold cavity, which is used for thermocompression molding of carbon fiber products. A horizontal sliding structure is arranged on the top mold structure 2. After the bottom mold structure 1 and the top mold structure 2 are closed, the horizontal sliding structure slides to one side or both sides, so as to form a snap component injection cavity a communicated with the first mold cavity inside the horizontal sliding structure. The piston-type injection component 4 is used to inject molding materials into the snap component injection cavity a.

[0071] When specifically manufacturing and molding carbon fiber products, first cut the pre-impregnated carbon fiber fabric into appropriate shapes and sizes, preheat the top mold structure 2 first, or use a hot oven to preheat the pre-impregnated carbon fiber fabric (about 260 °C). Use a manipulator to place the pre-impregnated carbon fiber fabric into the bottom mold cavity of the bottom mold structure 1 in the open mold state of the bottom mold structure and the top mold structure. The bottom mold structure 1 and the top mold structure 2 are closed, and the pre-impregnated carbon fiber surface is thermocompression molded. In the later stage of the thermocompression molding of the pre-impregnated carbon fiber surface (without opening the mold during the intermediate process), the horizontal sliding structure slides to one side or both sides, and a snap component injection cavity a communicated with the first mold cavity is formed inside the horizontal sliding structure. Control the piston-type injection component 4 to inject molding materials into the snap component injection cavity a. The molding materials are selected as plastic materials. This process makes the integration of the carbon fiber main body surface and the snap component good, with high structural strength. Moreover, this process only requires one mold opening, eliminating the steps of mold opening and closing and transporting intermediate products, thus improving the processing efficiency.

[0072] In one embodiment, as Fig.19 shown in the figure, a frame 5 and a hydraulic driving component 3 are also designed. The frame 5 is in a "C" shape. The bottom mold structure 1 is fixedly installed at the inner bottom of the frame 5. The top end of the hydraulic driving component 3 is fixedly installed at the inner top of the frame 5. The telescopic end of the hydraulic driving component 3 is fixedly installed with the top mold structure 2.

[0073] The hydraulic driving component 3 is used to drive the top mold structure 2 to move up and down to complete the mold opening and closing process of the top mold structure 2 and the bottom mold structure 1. This structure is simple and has a high degree of integration. It does not need to be installed on a traditional injection molding machine for injection molding, so as to be able to meet various actual use requirements.

[0074] In one embodiment, as Figure 10-Figure 18 shown in the figure, the top mold structure 2 includes: an upper frame body 201, a middle frame body 203, a lower frame body 205, a model block, and components such as a sliding diaphragm 2012, a sliding frame 208, and an electromagnetic block 20 that constitute the horizontal sliding structure.

[0075] Specifically, a guide assembly is provided between the upper frame 201 and the bottom mold structure 1, and the guide assembly is used to guide the up and down movement of the upper frame 201 to ensure that the upper frame 201 moves downward and completes a high-precision mold closing action with the bottom mold structure 1. The middle frame 203 is fixedly installed at the bottom of the upper frame 201, and the middle frame 203 has side panels on both sides, and the side panels occupy the vertical space. The lower frame 205 is fixedly installed at the bottom of the side panels of the middle frame 203, and an installation area is formed between the lower frame 205 and the middle frame 203. The installation area is the space between the lower frame 205 and the middle frame 203 and between the two side panels. The model block is fixedly installed at the bottom of the lower frame 205. The specific shape of the model block is determined according to the shape of the carbon fiber product to be molded. It is preferably designed to be a long strip structure, which is more suitable for this mold.

[0076] Specifically, the horizontal sliding structure includes: a sliding diaphragm 2012, a sliding frame 208, and an electromagnetic block 204. The sliding diaphragm 2012 is slidingly connected to the bottom of the lower frame 205, and the sliding diaphragm 2012 is attached to the outside of the model block. The sliding frame 208 is slidingly connected to the top of the lower frame 205, and one end of the sliding frame 208 is fixedly connected to the sliding diaphragm 2012. The electromagnetic block 204 is fixedly installed on the top of the middle frame 203, and the end of the sliding frame 208 is provided with a permanent magnet portion corresponding to the electromagnetic block 204.

[0077] Principle of the transverse sliding structure: During the process of mold closing and hot pressing, the transverse sliding structure is in a contracted state, that is, the magnetic force generated by the permanent magnet part attracts the sliding frame 208, and the sliding frame 208 remains close to the lower frame 205. At this time, the sliding diaphragm 2012 is in contact, and the sliding diaphragm 2012 is completely assembled with the lower frame 205 and the model block, and the snap-fit ​​component injection cavity a is not formed; during the process of mold opening and snap-fit ​​component injection, the electromagnetic block 204 exerts a magnetic force to repel the sliding frame 208, and the sliding frame 208 moves toward a position away from the lower frame 205. At this time, the sliding frame 208 drives the sliding diaphragm 2012 to move, and the sliding diaphragm 2012 forms a snap-fit ​​component injection cavity a with the lower frame 205 and the model block.

[0078] Specifically, the sliding diaphragm 2012 can be designed with one, two, or four according to specific requirements, such as Fig.12 As shown in , two sliding diaphragms 2012 are designed on one side of the model block, and a total of four sliding diaphragms 2012 are designed.

[0079] In one embodiment, the model block includes: a middle model 206 , a side model 2011 , a single link structure 2010 and a transmission rod 207 .

[0080] A vertical sliding hole 205a is provided at the top of the lower frame 205, and the middle model 206 includes an integrally arranged trapezoidal block 206a and a sliding vertical plate 206b located at the top of the trapezoidal block 206a. The trapezoidal block 206a is an approximately isosceles trapezoidal structure (the bottom of the trapezoidal block 206a is an arc shape, and both side surfaces are inclined surfaces). The sliding vertical plate 206b of the middle model 206 is slidably installed with the vertical sliding hole 205a, that is, the middle model 206 can slide up and down relative to the lower frame 205. Buckle grooves 205b are provided at the bottom of the lower frame 205 and on both sides of the vertical sliding hole 205a. The side model 2011 is movably installed on the buckle through a single connecting rod structure 210. The side model 2011 is provided with two groups at the position of the groove 205b, which correspond to the two side surfaces of the trapezoidal block 206a respectively. The design of the single-link structure 2010 allows the side model 2011 to swing. A horizontal sliding groove 205c is provided at the bottom of the lower frame 205 and located on the outside of the buckle groove 205b. The sliding diaphragm 2012 slides with the horizontal sliding groove 205c, and the sliding diaphragm 2012 is provided on the outside of the side model 2011. Both ends of the sliding vertical plate 206b of the middle model 206 are provided with mounting openings 206c, and a transmission rod 207 is fixedly installed at the mounting opening 206c, and a wedge-shaped matching structure 209 is provided between the transmission rod 207 and the sliding frame 208.

[0081] The wedge-shaped matching structure 209 includes a first inclined portion 209 a formed on the sliding frame 208 and a second inclined portion 209 b formed on the transmission rod 207 .

[0082] When the sliding frame 208 is in a retracted state, the wedge-shaped matching structure 209 enables the sliding upright plate 206b of the middle model 206 to slide to the upper dead point; when the sliding frame 208 is in an extended state, the sliding upright plate 206b of the middle model 206 has space to slide downward.

[0083] The specific working principle is as follows: when the sliding frame 208 is in a retracted state, that is, during the mold closing and hot pressing process of the pre-impregnated carbon fiber fabric, the wedge-shaped matching structure 209 makes the sliding vertical plate 206b of the middle model 206 slide to the upper dead point, that is, the middle model 206 cannot move up and down relative to the lower frame 205, and the two sides of the middle model 206 squeeze the side model 2011, so that the side model 2011 cannot move relative to the lower frame 205. At this time, the model block of the top mold structure 2 is stable, and the pre-impregnated carbon fiber fabric can be hot-pressed. When the snap-fit ​​component is injected and the mold is opened, when the sliding frame 208 is in an extended state, the sliding vertical plate 206b of the middle model 206 has space to slide downward. In the process of mold opening, such as Fig.14As shown in , the lower frame 205 moves upward, and is restricted by the snap-fit ​​components on the carbon fiber product, so the middle model 206 and the side model 2011 cannot move upward directly, that is, the middle model 206 moves downward relative to the lower frame 205 (in fact, the lower frame 205 moves upward, and the middle model 206 basically does not move), and the two sides of the middle model 206 no longer squeeze the side model 2011, and the side model 2011 can be flipped inward to bypass the snap-fit ​​components, thereby completing the mold opening action.

[0084] In one embodiment, a limit pin 205d is fixedly installed at the bottom of the horizontal sliding groove 205c, and the sliding diaphragm 2012 includes: a main body 2012a, a sliding groove 2012c is opened on the top of the main body 2012a, and the limit pin 205d is located at the inner side of the sliding groove 2012c. The sliding groove 2012c cooperates with the limit pin 205d to further ensure the accuracy and stability of the sliding process of the sliding diaphragm 2012. A notch 2012b is provided at one end of the main body 2012a, and a molded part 205e is fixedly connected to the bottom of the horizontal sliding groove 205c and at a position corresponding to the notch 2012b. The molded part 205e cooperates with the injection cavity a of the snap component to form an injection cavity of different shapes, for example Fig.13 As shown in , a fastener with an ear-shaped structure is formed, and the molded part 205e is designed to include: an outer contour molded part 205e1 and a hole molded part 205e2.

[0085] In one embodiment, a connecting cavity 2011a is provided on the top of the side model 2011, a first connecting ear 2011b is fixedly connected inside the connecting cavity 2011a, a second connecting ear is fixedly connected to the bottom of the buckle groove 205b, a first end of the single-link structure 2010 is movably connected to the first connecting ear 2011b, a second end of the single-link structure 2010 is movably connected to the second connecting ear, and both ends of the single-link structure 2010 are movably installed, so that the side model 2011 has a flexible moving path, thereby ensuring that the side model 2011 can bypass the injection-molded snap-in component.

[0086] In one embodiment, if Figure 5 As shown in the figure, the bottom mold structure 1 includes: a bottom mold plate 101, a heating base 103, a bottom mold body 104 and a heating / cooling oil supply system (not shown in the figure).

[0087] The guide assembly includes: a guide column mother component 102 fixedly mounted on the bottom template 101 and a guide column male component 202 fixedly mounted on the upper frame 201. The guide column mother component 102 and the guide column male component 202 are slidably matched to guide the relative movement of the bottom template 101 and the upper frame 201. The heating base 103 is fixedly mounted on the top of the bottom template 101. The heating base 103 is used to heat the bottom mold body 104. The bottom mold body 104 is fixedly mounted on the top of the heating base 103. A sealed heating oil chamber is formed between the heating base 103 and the bottom mold body 104. A bottom mold cavity 104a is arranged on the top of the bottom mold body 104. An injection port 104b is opened on the inner side of the bottom mold cavity 104a. The injection port 104b corresponds to the injection cavity a of the snap component. A side sliding port 104c is arranged on the side of the bottom mold cavity 104a. The heating / cooling oil supply system circulates oil to the heating oil chamber.

[0088] By continuously circulating high-temperature oil into the heating oil chamber, the bottom mold body 104 can be heated and preheated. When necessary, low-temperature oil can also be continuously circulated into the heating oil chamber to achieve rapid cooling of the product.

[0089] In one embodiment, if Figure 6 - Fig. 9 As shown, the piston injection assembly 4 includes: a piston assembly 403, a horizontally placed spiral conveying cylinder 405, a branch pipe 401, a heating assembly 404, a silo 406, etc.

[0090] A heating component 404 is arranged outside the piston component 403, and the heating component 404 heats the piston component 403 to melt the plastic particles inside the piston component 403. The horizontal spiral conveying cylinder 405 is fixedly connected to the bottom mold structure 1 through the mounting frame 407. The horizontal spiral conveying cylinder 405 is used to convey materials. The discharge end of the horizontal spiral conveying cylinder 405 is connected to the first end of the piston component 403 through the guide channel. The feed end of the horizontal spiral conveying cylinder 405 is provided with a silo 406, and the silo 406 stores granular raw materials. The piston component 403 conveys the granular raw materials into the piston component 403, and can also A heating structure is installed on the outer side of the horizontal spiral conveyor cylinder 405 to melt the granular raw material first, and the horizontal spiral conveyor cylinder 405 sends the initially melted raw material into the piston assembly 403, the first end of the branch pipe 401 is connected to the second end of the piston assembly 403, the second end of the branch pipe 401 is connected to the bottom mold structure 1, and an insulation kit 402 is arranged on the outer side of the branch pipe 401, and the insulation kit 402 is used to insulate the branch pipe 401, the material is heated and melted in the piston assembly 403, and then pumped into the branch pipe 401 by the piston assembly 403, and enters the bottom mold structure 1 through the branch pipe 401.

[0091] Specifically, the piston assembly 403 includes: a piston cylinder 403d, a piston rod 403c, and an electric cylinder 403a. The piston cylinder 403d and the electric cylinder 403a are fixedly connected to the bottom mold structure 1. The piston rod 403c cooperates with the piston cylinder 403d. The action end of the electric cylinder 403a is fixedly connected to the piston rod 403c through the connecting frame 403b. The electric cylinder 403a is a telescopic structure of a lead screw structure driven by a servo motor, which can control the extension amount of the electric cylinder 403a, that is, it can control the pumping amount of the piston assembly 403; wherein the piston rod 403c includes: a long rod 403c1, the side of the long rod 403c1 is slidably connected with a sealing member 403c2, the sealing member 403c2 is fixedly installed with the port of the piston cylinder 403d, and the end of the long rod 403c1 is fixed A piston disc 403c3 is connected, and the piston disc 403c3 divides the interior of the piston cylinder 403d into a heating chamber and an extrusion chamber. A through hole 403c4 is opened at the end of the piston disc 403c3, and a sealing end connector 403c5 and a circulation end connector 403c6 are respectively arranged on both sides of the through hole 403c4. The sealing end connector 403c5 is close to the extrusion chamber, and the circulation end connector 403c6 is close to the heating chamber. One end of the sealing end connector 403c5 is provided with a tapered portion 403c5a, and the tapered portion 403c5a further seals and blocks the through hole 403c4. The other end of the sealing end connector 403c5 passes through the through hole 403c4 and is fixedly installed with the circulation end connector 403c6. The end of the circulation end connector 403c6 is provided with a cylindrical protrusion 403c7.

[0092] When in use, the electric cylinder 403a of the piston assembly 403 drives the piston rod 403c to extend and retract, and when the piston plate 403c3 of the piston rod 403c moves toward the heating chamber, the structure formed by the sealing end connector 403c5 and the flow end connector 403c6 is pushed by the hot melted material, so that the cylindrical protrusion 403c7 of the flow end connector 403c6 abuts against the end surface of the piston plate 403c3, and the molten material in the heating chamber passes through the gap between the flow end connector 403c6 and the end surface of the piston plate 403c3. The material in the extrusion chamber pushes the structure formed by the sealing end connector 403c5 and the flow end connector 403c6, so that the tapered portion 403c5a of the sealing end connector 403c5 abuts against the port of the through hole 403c4. At this time, the material in the extrusion chamber is pressurized, and the material is squeezed into the bottom mold structure 1 through the branch pipe 401.

[0093] Embodiment 2:

[0094] A process for hot-pressing and injection molding one-piece forming of a carbon fiber product, using a mold for hot-pressing and injection molding one-piece forming of a carbon fiber product in Example 1, specifically comprising the following steps:

[0095] S1. Put the pre-impregnated carbon fiber fabric into the bottom mold cavity of the bottom mold structure when the bottom mold structure and the top mold structure are in an open mold state, and the bottom mold structure and the top mold structure are molded together, and the pre-impregnated carbon fiber fabric is hot-pressed by relying on the first mold cavity formed by the bottom mold structure and the top mold structure.

[0096] Generally, during the hot pressing process, the prepreg carbon fiber surface needs to be cut first and then preheated. The bottom mold structure also needs to be preheated. After preheating, the prepreg carbon fiber fabric is placed in the bottom mold cavity of the bottom mold structure while the bottom mold structure and the top mold structure are in the open mold state. The bottom mold structure and the top mold structure are molded together, and the prepreg carbon fiber fabric is hot-pressed by relying on the first mold cavity formed by the bottom mold structure and the top mold structure.

[0097] S2. The transverse sliding structure slides to one side or both sides, and the inner side of the transverse sliding structure forms a snap-fit ​​component injection cavity connected to the first mold cavity. The piston injection assembly is used to inject molding material into the snap-fit ​​component injection cavity. In this process, since the carbon fiber fabric is not cooled, the carbon fiber main body surface and the snap-fit ​​component are well-formed and have high structural strength. Moreover, this process only requires one mold opening, eliminating the steps of opening and closing the mold and transferring the intermediate product, thereby improving the processing efficiency.

[0098] S3, cooling the molding, and taking out the molded carbon fiber product.

[0099] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A mold for hot-pressing and injection molding of carbon fiber products, comprising a bottom mold structure (1), a top mold structure (2) and a piston injection assembly (4), characterized in that: The bottom die structure (1) and the top die structure (2) are closed to form a first die cavity. A horizontal sliding structure is provided on the top die structure (2). After the bottom die structure (1) and the top die structure (2) are closed, the horizontal sliding structure slides to one side or both sides, so as to form a snap member injection cavity (a) communicating with the first die cavity inside the horizontal sliding structure; The piston type injection component (4) is used to inject molding materials into the snap member injection cavity (a).

2. A mold for hot pressing and injection molding of carbon fiber products according to claim 1, characterized in that: It further includes: A frame (5) and a hydraulic driving member (3). The frame (5) is in a "C" shape. The bottom die structure (1) is fixedly installed at the inner bottom of the frame (5). The top end of the hydraulic driving member (3) is fixedly installed at the inner top of the frame (5). The telescopic end of the hydraulic driving member (3) is fixedly installed with the top die structure (2).

3. The mold for hot pressing and injection molding of carbon fiber products according to claim 1, characterized in that: The top die structure (2) includes: An upper frame body (201). A guiding component is provided between the upper frame body (201) and the bottom die structure (1); A middle frame body (203). The middle frame body (203) is fixedly installed at the bottom of the upper frame body (201), and both sides of the middle frame body (203) have side plates; A lower frame body (205). The lower frame body (205) is fixedly installed at the bottom of the side plates of the middle frame body (203). An installation area is formed between the lower frame body (205) and the middle frame body (203); A model block, which is fixedly installed at the bottom of the lower frame body (205); The horizontal sliding structure includes: a sliding diaphragm (2012), a sliding frame (208), and an electromagnetic block (204). The sliding diaphragm (2012) is slidably connected to the bottom of the lower frame body (205), and the sliding diaphragm (2012) is attached to the outside of the model block. The sliding frame (208) is slidably connected to the top of the lower frame body (205), and one end of the sliding frame (208) is fixedly connected to the sliding diaphragm (2012). The electromagnetic block (204) is fixedly installed at the top of the middle frame body (203), and a permanent magnet part corresponding to the electromagnetic block (204) is provided at the end of the sliding frame (208).

4. The mold for hot pressing and injection molding of carbon fiber products according to claim 3, characterized in that: The model block includes: A middle part model (206). A vertical sliding hole (205a) is opened at the top of the lower frame body (205). The middle part model (206) includes a trapezoidal block (206a) integrally arranged and a sliding vertical plate (206b) located at the top of the trapezoidal block (206a). The sliding vertical plate (206b) of the middle part model (206) is slidably installed in the vertical sliding hole (205a); A side part model (2011). Buckle grooves (205b) are provided on both sides of the bottom of the lower frame body (205) and located on both sides of the vertical sliding hole (205a). The side part model (2011) is movably installed at the position of the buckle grooves (205b) through a single-link structure (2010); A horizontal sliding groove (205c) is provided at the bottom of the lower frame (205) and located outside the buckle groove (205b), the sliding diaphragm (2012) is slidably matched with the horizontal sliding groove (205c), and the sliding diaphragm (2012) is provided outside the side model (2011); Both ends of the sliding upright plate (206b) of the middle model (206) are provided with mounting openings (206c), a transmission rod (207) is fixedly mounted at the mounting opening (206c), and a wedge-shaped matching structure (209) is provided between the transmission rod (207) and the sliding frame (208); When the sliding frame (208) is in a retracted state, the wedge-shaped matching structure (209) causes the sliding upright plate (206b) of the middle model (206) to slide to the top dead center; When the sliding frame (208) is in an extended state, the sliding upright plate (206b) of the middle model (206) has space to slide downward; The wedge-shaped matching structure (209) comprises: a first inclined portion (209a) provided on the sliding frame (208) and a second inclined portion (209b) provided on the transmission rod (207).

5. The mold for hot pressing and injection molding of carbon fiber products according to claim 4, characterized in that: A limiting pin (205d) is fixedly installed at the bottom of the horizontal sliding groove (205c); The sliding diaphragm (2012) comprises: a main body (2012a), a sliding groove (2012c) is provided on the top of the main body (2012a), the limiting pin (205d) is located on the inner side of the sliding groove (2012c), and a notch (2012b) is provided at one end of the main body (2012a); A molded part (205e) is fixedly connected to the bottom of the horizontal sliding groove (205c) and at a position corresponding to the notch portion (2012b).

6. The mold for hot pressing and injection molding of carbon fiber products according to claim 5, characterized in that: The molded part (205e) comprises: an outer contour molded part (205e1) and a hole molded part (205e2).

7. The mold for hot pressing and injection molding of carbon fiber products according to claim 4, characterized in that: The top of the side model (2011) is provided with a connection cavity (2011a), and the interior of the connection cavity (2011a) is fixedly connected with a first connection ear (2011b); A second connecting ear is fixedly connected to the bottom of the buckle groove (205b); The first end of the single-link structure (2010) is movably connected to the first connecting ear (2011b), and the second end of the single-link structure (2010) is movably connected to the second connecting ear.

8. The mold for hot pressing and injection molding of carbon fiber products according to claim 3, characterized in that: The bottom mold structure (1) comprises: The bottom template (101) comprises a guide assembly comprising: a guide column mother component (102) fixedly mounted on the bottom template (101) and a guide column male component (202) fixedly mounted on an upper frame (201), wherein the guide column mother component (102) and the guide column male component (202) are slidably matched; A heating base (103), wherein the heating base (103) is fixedly mounted on the top of the bottom template (101); A bottom mold body (104), the bottom mold body (104) being fixedly mounted on the top of a heating base (103), a sealed heating oil cavity being formed between the heating base (103) and the bottom mold body (104), a bottom mold cavity (104a) being provided on the top of the bottom mold body (104), a material injection port (104b) being provided on the inner side of the bottom mold cavity (104a), the material injection port (104b) corresponding to the buckle component injection cavity (a), and a side sliding port (104c) being provided on the side of the bottom mold cavity (104a); It also includes: a heating / cooling oil supply system, which circulates oil supply to the heating oil chamber.

9. The mold for hot pressing and injection molding of carbon fiber products according to claim 1, characterized in that: The piston injection assembly (4) comprises: A piston assembly (403), wherein a heating assembly (404) is arranged outside the piston assembly (403); A transverse spiral conveying cylinder (405), wherein the transverse spiral conveying cylinder (405) is fixedly connected to the bottom mold structure (1) via a mounting frame (407), a discharge end of the transverse spiral conveying cylinder (405) is connected to the first end of the piston assembly (403) via a guide channel, and a feed bin (406) is provided at the feed end of the transverse spiral conveying cylinder (405); A branch pipe (401), wherein a first end of the branch pipe (401) is connected to a second end of the piston assembly (403), a second end of the branch pipe (401) is connected to a bottom mold structure (1), and a heat insulation kit (402) is provided on the outside of the branch pipe (401); The piston assembly (403) comprises: a piston cylinder (403d), a piston rod (403c), and an electric cylinder (403a); the piston cylinder (403d) and the electric cylinder (403a) are both fixedly connected to the bottom mold structure (1); the piston rod (403c) cooperates with the piston cylinder (403d); and the action end of the electric cylinder (403a) is fixedly connected to the piston rod (403c) via a connecting frame (403b); The piston rod (403c) comprises: a long rod (403c1), a sealing member (403c2) is slidably connected to the side of the long rod (403c1), the sealing member (403c2) is fixedly installed with the port of the piston cylinder (403d), the end of the long rod (403c1) is fixedly connected with a piston disk (403c3), the piston disk (403c3) divides the interior of the piston cylinder (403d) into a heating chamber and an extrusion chamber, and the end of the piston disk (403c3) is provided with a through hole (403c4), the through hole (403c 4) are respectively provided with a sealed end connecting piece (403c5) and a circulating end connecting piece (403c6), the sealed end connecting piece (403c5) is close to the extrusion chamber, and the circulating end connecting piece (403c6) is close to the heating chamber, one end of the sealed end connecting piece (403c5) is provided with a tapered portion (403c5a), the other end of the sealed end connecting piece (403c5) passes through the through hole (403c4) and is fixedly installed with the circulating end connecting piece (403c6), and the end of the circulating end connecting piece (403c6) is provided with a cylindrical protrusion (403c7).

10. A hot pressing and injection molding integrated molding process for carbon fiber products, characterized in that: Using the mold for hot pressing and injection molding of carbon fiber products as described in any one of claims 1 to 9 specifically comprises the following steps: S1. Putting the pre-impregnated carbon fiber fabric into the bottom mold cavity of the bottom mold structure when the bottom mold structure and the top mold structure are in an open mold state, closing the bottom mold structure and the top mold structure, and hot-pressing the pre-impregnated carbon fiber fabric by relying on the first mold cavity formed by closing the bottom mold structure and the top mold structure; S2, the horizontal sliding structure slides to one side or both sides, and the inner side of the horizontal sliding structure forms a buckle component injection cavity connected to the first mold cavity, and the piston injection assembly is used to inject molding material into the buckle component injection cavity; S3, cooling the molding, and taking out the molded carbon fiber product.

Images