A molding die

Abstract

The present application relates to the technical field of composite product processing, and discloses a forming die. The forming die is used for RTM forming and comprises a die body, a support and a glue injection system. The die body comprises a first die plate and a second die plate connected through rotation, the first die plate and the second die plate can be buckled to form a forming cavity, the rotation shaft extends along a first direction, the first die plate is connected with a first sliding rod, the second die plate is connected with a second sliding rod, the first sliding rod and the second sliding rod are non-coaxially arranged and extend along the first direction; the support is provided with spaced straight sliding channels and first arc-shaped sliding channels, the straight sliding channels extend along a second direction, the first sliding rod is in sliding cooperation with the straight sliding channels, and the second sliding rod is in sliding cooperation with the first arc-shaped sliding channels, so that the die body can be flipped around the first direction; the glue injection system is arranged on the die body and comprises glue injection ports and glue outlet ports which can communicate with the forming cavity. The present application can realize the flipping and opening and closing of the die body without using a travelling crane, simplifies the operation process and improves practicability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of composite product processing, and in particular to a forming die. BACKGROUND

[0002] Composite materials are now widely used in the manufacture of aircraft parts, and are usually made using prepreg / autoclave technology and RTM forming technology. Prepreg / autoclave technology is the main forming process, but some thick or complex-shaped parts using prepreg technology have the disadvantages of large amount of manual laying, complex pre-compaction operation, and difficulty in ensuring the thickness tolerance. As a complementary technology to the prepreg / autoclave technology, the RTM process can be applied to small parts with higher complexity, such as C-shaped cross-section aircraft window frames.

[0003] RTM process is the abbreviation of Resin Transfer Moulding, and the RTM process is a composite material forming process method in which fibers and resins are treated separately. The basic principle of the RTM forming process is to inject low-viscosity resin into a closed mold, fully impregnate the dry fiber preform placed in the mold through the flow of the resin, and finally obtain a composite material product. The advantage of the RTM part is excellent dimensional tolerance control and high surface quality net size forming. The ring-shaped symmetrical structure of the aircraft window frame is very suitable for using the RTM forming process, and the forming die needs to meet the functions of positioning, glue injection, curing, demolding, etc. In the prior art, the forming die of the RTM process needs to use a crane for overturning, which is difficult to operate and has low production efficiency.

[0004] Therefore, there is an urgent need for a forming die to solve the above-mentioned problems. SUMMARY

[0005] The purpose of the present application is to provide a forming die which can realize the overturning and opening and closing of the die body without using a crane, simplify the operation process, speed up the production efficiency, and improve the practicality.

[0006] To achieve this purpose, the present application adopts the following technical solutions:

[0007] A forming die for RTM forming, comprising:

[0008] A die body comprising a first mold plate and a second mold plate connected by a rotating shaft, the first mold plate and the second mold plate being capable of being buckled to form a forming cavity, the rotating shaft extending along a first direction arranged horizontally, the first mold plate being connected with a first sliding rod, the second mold plate being connected with a second sliding rod, the first sliding rod and the second sliding rod being arranged non-coaxially and extending along the first direction;

[0009] The support is provided with a straight slide and a first arc-shaped slide, the straight slide extends along a second direction arranged horizontally, the first direction is perpendicular to the second direction, the center of the first arc-shaped slide is located on a turning axis arranged along the first direction, the first slide rod is in sliding fit with the straight slide, the second slide rod is in sliding fit with the first arc-shaped slide, the turning axis can be perpendicular to the axis of the straight slide, when the first mold plate is buckled with the second mold plate, the second slide rod can make the mold body turn around the turning axis when sliding along the first arc-shaped slide, and the mold body can be switched between a vertical position and a horizontal position.

[0010] The glue injection system is arranged on the mold body, the glue injection system comprises a glue injection port and a glue outlet, and the glue injection port and the glue outlet can communicate with the cavity.

[0011] As an optional technical solution of the forming mold, the support is further provided with a second arc-shaped slide, the center of the second arc-shaped slide and the center of the first arc-shaped slide are located on the turning axis, the projection of the second arc-shaped slide and the first arc-shaped slide along the first direction is centrally symmetric about the turning axis, one end of the second arc-shaped slide communicates with the end of the straight slide, and the other end extends towards the lower side of the straight slide, the first slide rod can enter the second arc-shaped slide through the straight slide and be in sliding fit with the second arc-shaped slide, when the first slide rod is located in the second arc-shaped slide and the second slide rod is located in the first arc-shaped slide, the first mold plate is buckled with the second mold plate.

[0012] As an optional technical solution of the forming mold, the support comprises two support members arranged in parallel and spaced apart along the first direction, the two support members are symmetrically arranged, and the straight slide, the first arc-shaped slide and the second arc-shaped slide are arranged on each support member.

[0013] The mold body is arranged between the two support members, the first slide rod is arranged on both sides of the first mold plate along the first direction, the two first slide rods are coaxially arranged and correspondingly fit with the two straight slides or the two second arc-shaped slides, and the second slide rod is arranged on both sides of the second mold plate along the first direction, the two second slide rods are coaxially arranged and correspondingly fit with the two first arc-shaped slides.

[0014] As an optional technical solution of the forming mold, the forming mold further comprises a heating system, the heating system is arranged in the first mold plate and / or the second mold plate, and the heating system comprises at least one heating member.

[0015] As an optional technical scheme of the forming mold, the forming mold further comprises a cooling system, the cooling system comprises a cooling air duct, and the cooling air duct is arranged in the first mold plate and / or the second mold plate.

[0016] As an optional technical scheme of the forming mold, the forming mold further comprises a temperature acquisition member arranged on the mold body and used for acquiring the temperature in the cavity.

[0017] As an optional technical scheme of the forming mold, the forming mold further comprises a pressure acquisition member arranged on the mold body and used for acquiring the pressure in the cavity.

[0018] As an optional technical scheme of the forming mold, the forming mold further comprises a locking assembly, the locking assembly comprises a locking member and a locking hook, one of the first mold plate and the second mold plate is provided with the locking member, and the other is provided with the locking hook, and the locking member is detachably connected with the locking hook.

[0019] As an optional technical scheme of the forming mold, one of the first mold plate and the second mold plate is provided with a fixed core mold on the inner side, and the other is provided with a shaping plate, the shaping plate is provided with a shaping groove, the fixed core mold is annular and is provided with a forming groove in the middle, the glue injection port is communicated with the forming groove, the glue outlet port is communicated with the shaping groove, when the first mold plate and the second mold plate are buckled, the fixed core mold is arranged in the shaping groove, and the forming groove and the shaping groove form the cavity.

[0020] The thermal expansion coefficient of the shaping plate is same as the thermal expansion coefficient of the forming resin and is less than the thermal expansion coefficient of the fixed core mold.

[0021] As an optional technical scheme of the forming mold, the glue injection port is arranged in the middle of one of the first mold plate and the second mold plate, and the glue outlet port is arranged in the middle of the other.

[0022] The beneficial effects of the present application: the forming mold provided by the present application is provided with a straight sliding groove and a first arc-shaped sliding groove on the support, and the second sliding rod can slide along the first arc-shaped sliding groove, so that the mold body after buckling can be turned around the turning shaft, when the mold body is turned to the horizontal position, glue can be injected into the cavity through the glue injection port, when the mold body is turned to the vertical position, the first sliding rod can slide along the straight sliding groove, so that the first mold plate and the second mold plate relatively rotate around the turning shaft, the free end of the first mold plate and the free end of the second mold plate are away from each other, until the mold body is in an open state, the composite material workpiece is taken out, and the practicability is improved. The forming mold provided by the present application can directly realize the turning and opening and closing of the mold body through the straight sliding groove and the first arc-shaped groove provided on the support, avoiding the use of a travelling crane, simplifying the operation process, accelerating the production efficiency, and improving the practicability. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structure schematic view of the forming mold provided by the embodiment of the present application;

[0024] Figure 2 is a structure schematic view of the mold body in an open state provided by the embodiment of the present application;

[0025] Figure 3 is a structure schematic view of the support provided by the embodiment of the present application;

[0026] Figure 4 is a schematic view of the mold body in a vertical position and a horizontal position provided by the embodiment of the present application;

[0027] Figure 5 is a schematic view of the mold body in a buckled state and an open state provided by the embodiment of the present application;

[0028] Figure 6 is a split view of the first mold plate provided by the embodiment of the present application;

[0029] Figure 7 is Figure 6 the local enlarged view of A in FIG.

[0030] in the figure:

[0031] 1, mold body; 11, first mold plate; 111, first sliding rod; 112, mold plate body; 113, cover body; 12, second mold plate; 121, second sliding rod; 13, turning shaft; 14, handle; 15, fixed core mold; 16, fixed core mold; 17, positioning pin; 18, shaping plate; 181, shaping groove;

[0032] 2, support; 21, straight sliding groove; 22, first arc-shaped sliding groove; 23, second arc-shaped sliding groove; 24, support; 25, baffle; 26, universal wheel;

[0033] 32, glue outlet; 4, heating member; 41, heating member accommodating groove; 42, electric connector;

[0034] 5, cooling air duct; 51, compressed air pipe; 52, converging air duct; 53, diverging air duct;

[0035] 6, temperature collecting member; 7, pressure collecting member;

[0036] 8, locking assembly; 81, locking member; 82, locking hook; 9, clamp; DETAILED DESCRIPTION

[0037] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present application will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0038] In the description of the present application, unless explicitly defined and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the present application, unless explicitly defined and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0040] The technical solutions of the present application will be further described below with reference to the drawings and through specific embodiments.

[0041] The present embodiment provides a forming die for RTM forming. Specifically, as shown in Figures 1-3As shown, the forming die includes a die body 1, a support 2 and a glue injection system. The die body 1 includes a first mold plate 11 and a second mold plate 12 connected by a rotating shaft 13, the first mold plate 11 and the second mold plate 12 can be buckled to form a forming cavity, the rotating shaft 13 extends along a first direction arranged horizontally, the first mold plate 11 is connected with a first sliding rod 111, the second mold plate 12 is connected with a second sliding rod 121, the first sliding rod 111 and the second sliding rod 121 are arranged non-coaxially and both extend along the first direction; the support 2 is provided with a straight sliding channel 21 and a first arc-shaped sliding channel 22, the straight sliding channel 21 extends along a second direction arranged horizontally, the first direction is perpendicular to the second direction, the center of the first arc-shaped sliding channel 22 is located on a flip axis arranged along the first direction, the first sliding rod 111 is in sliding fit with the straight sliding channel 21, the second sliding rod 121 is in sliding fit with the first arc-shaped sliding channel 22, the flip axis can be perpendicular to the axis of the straight sliding channel 21, when the first mold plate 11 and the second mold plate 12 are buckled, the second sliding rod 121 can make the die body 1 flip around the flip axis when sliding along the first arc-shaped sliding channel 22, and the die body 1 can be switched between a vertical position and a horizontal position; the glue injection system is arranged on the die body 1, the glue injection system includes a glue injection port and a glue outlet 32, and both the glue injection port and the glue outlet 32 can communicate with the forming cavity.

[0042] The forming die provided by the embodiment can realize that the die body 1 can flip around the flip axis after the first mold plate 11 and the second mold plate 12 are buckled, glue can be injected into the forming cavity through the glue injection port when the die body 1 is flipped to the horizontal position, the first sliding rod 111 can slide along the straight sliding channel 21 when the die body 1 is flipped to the vertical position, so that the first mold plate 11 and the second mold plate 12 relatively rotate around the rotating shaft 13, the free end of the first mold plate 11 and the free end of the second mold plate 12 are away from each other, until the die body 1 is in an open state, the composite material workpiece is convenient to take out, and the practicability is improved. The forming die provided by the embodiment realizes the flip and opening and closing of the die body 1 through the straight sliding channel 21 and the first arc-shaped channel 22 arranged on the support 2, avoids using a travelling crane to operate, simplifies the operation process, speeds up the production efficiency, and improves the practicability.

[0043] It should be noted that, as Figure 5 As shown in the figure, the die body 1 is buckled on the support 2 and in an open state, wherein the die body 1 in the open state is represented by a dashed line. As Figure 4 As shown in the figure, the die body 1 is in a vertical position and a horizontal position on the support 2, wherein the die body 1 in the vertical state is represented by a dashed line.

[0044] Specifically, the flip axis can be perpendicular to the axis of the straight sliding channel 21 itself or the extension line of the axis of the straight sliding channel 21, which is not limited here.

[0045] Preferably, such as Figure 3 As shown, the bracket 2 includes two parallel support members 24 spaced apart along a first direction. The two support members 24 are symmetrically arranged, and the mold body 1 is placed between the two support members 24, with the two support members 24 located on both sides of the mold body 1 along the first direction. The support members 24 are plate-shaped and extend along a second direction, with the two support members 24 facing each other. One straight slide groove 21 and one first arc-shaped groove 22 can each be provided, and the straight slide groove 21 and the first arc-shaped groove 22 are formed on the same support member 24. In this case, one first slide rod 111 and one second slide rod 121 are also provided, and the first slide rod 111 and the second slide rod 121 extend toward the support member 24. Alternatively, one straight slide groove 21 and one first arc-shaped groove 22 can each be provided, and the straight slide groove 21 and the first arc-shaped groove 22 are formed on different support members 24. In this case, one first slide rod 111 and one second slide rod 121 are also provided, and the first slide rod 111 and the second slide rod 121 extend toward the corresponding support member 24. Alternatively, two straight slide grooves 21 can be provided, and one first arc-shaped groove 22 can be provided, that is, straight slide grooves 21 are formed on both support members 24, and one support member 24 has a first arc-shaped groove 22. In this case, two first slide rods 111 are provided, and two second slide rods 121 are provided. There is one configuration where two first sliding rods 111 extend toward two support members 24 respectively, and a second sliding rod 121 extends toward the corresponding support member 24. Two first arc-shaped grooves 22 can be provided, and one straight sliding groove 21 can be provided. That is, both support members 24 have first arc-shaped grooves 22, and one support member 24 has a straight sliding groove 21. In this case, there are two second sliding rods 121 and one first sliding rod 111. The two second sliding rods 121 extend toward the two support members 24 respectively, and the first sliding rod 111 extends toward the corresponding support member 24. Alternatively, two straight sliding grooves 21 and two first arc-shaped grooves 22 can each be provided, meaning both support members 24 have straight sliding grooves 21 and first arc-shaped grooves 22. In this case, there are also two first sliding rods 111 and two second sliding rods 121, and the two first sliding rods 111 and the two second sliding rods 121 extend toward the two support members 24 respectively.

[0046] In this embodiment, both support members 24 are provided with straight sliding grooves 21 and first arc-shaped grooves 22. That is, the first template 11 is provided with first sliding rods 111 on both sides along the first direction, and the second template 12 is provided with second sliding rods 121 on both sides along the first direction. This structural arrangement improves the support for the mold body 1, enhances the stability of the molding mold during use, ensures the molding effect, and improves the quality of the parts.

[0047] Preferably, the second arc-shaped slide 23 is also provided on the support 2, the centers of the first arc-shaped slide 22 and the second arc-shaped slide 23 are located on the turning axis, the projection of the second arc-shaped slide 23 on the plane parallel to the support 24 in the first direction is symmetric to the projection of the first arc-shaped slide 22 on the same plane about the center of the turning axis, that is, the diameter of the second arc-shaped slide 23 is the same as that of the first arc-shaped slide 22 and the second arc-shaped slide 23 is located on the same circumference. One end of the second arc-shaped slide 23 is in communication with the end of the straight slide 21, and the other end extends towards the lower side of the straight slide 21. The first arc-shaped slide 22 symmetric to the center of the second arc-shaped slide 23 extends towards the upper side of the straight slide 21. The first slide rod 111 can enter the second arc-shaped slide 23 through the straight slide 21 and slide with the second arc-shaped slide 23. When the first slide rod 111 is located in the second arc-shaped slide 23 and the second slide rod 121 is located in the first arc-shaped slide 22, the first mold plate 11 is buckled to the second mold plate 12.

[0048] In the embodiment, the size of the first mold plate 11 is the same as that of the second mold plate 12, so that the center of gravity of the mold body 1 is approximately located at the middle position, the first slide rod 111 is located at the middle of the first mold plate 11, and the second slide rod 121 is located at the middle of the second mold plate 12, which avoids the center of gravity of the mold body 1 rising when the mold body 1 rotates along the first arc-shaped slide 22 and the second arc-shaped slide 23, and facilitates the rotation of the mold body 1.

[0049] It can be understood that, since the second arc-shaped slide 23 is in communication with the straight slide 21, that is, the second arc-shaped slide 23 is provided on the support 24 in which the straight slide 21 is provided, it is further preferred that the width of the straight slide 21 is the same as that of the second arc-shaped slide 23, which facilitates processing. In the embodiment, since the straight slide 21 is provided on the two supports 24, the second arc-shaped slide 23 is provided on the two supports 24, that is, the straight slide 21, the first arc-shaped slide 22 and the second arc-shaped slide 23 are provided on each support 24.

[0050] In the embodiment, the centers of the first arc-shaped slide 22 and the second arc-shaped slide 23 are located on the turning axis, the second arc-shaped slide 23 and the first arc-shaped slide 22 on the same support 24 are symmetric about the center of the turning axis, and one end of the second arc-shaped slide 23 is in communication with the end of the straight slide 21 and the other end extends towards the lower side of the straight slide 21. That is, the turning axis intersects with the extension line of the axis of the straight slide 21.

[0051] Specifically, since the two supports 24 are symmetrically arranged, the two first slide rods 111 are coaxially arranged and correspondingly matched with the two straight slides 21 or the two second arc-shaped slides 23, and the two second slide rods 121 are coaxially arranged and correspondingly matched with the two first arc-shaped slides 22.

[0052] It can be understood that the mold body 1 switches between the vertical position and the horizontal position, and the angle range of the second arc-shaped slide 23 and the first arc-shaped slide 22 is not less than 90°. In the embodiment, the angle of the first arc-shaped slide 22 and the second arc-shaped slide 23 is 90°, the first end of the first arc-shaped slide 22 is located directly above the axis of rotation, and the second end of the first arc-shaped slide 22 is located on the extension line of the axis of the straight slide 21. The first end of the second arc-shaped slide 23 is connected with the straight slide 21, and the second end of the second arc-shaped slide 23 is located directly below the axis of rotation. The structure is arranged such that when the mold body 1 is rotated, when the mold body 1 is located in the vertical position, the first slide rod 111 abuts against the end face of the first end of the second arc-shaped slide 23, and the second slide rod 121 abuts against the end face of the second end of the first arc-shaped slide 22; when the mold body 1 is located in the horizontal position, the first slide rod 111 abuts against the end face of the second end of the second arc-shaped slide 23, and the second slide rod 121 abuts against the end face of the first end of the first arc-shaped slide 22.

[0053] In other embodiments, the second arc-shaped slide 23 can also not be provided, and at this time the axis of rotation directly intersects with the axis of the straight slide 21, the first end of the first arc-shaped slide 22 is located directly above or below the axis of rotation, and the second end of the first arc-shaped slide 22 is located on the axis of the straight slide 21 and can be in communication with the straight slide 21 or spaced apart from the end of the straight slide 21. In order to facilitate supporting the mold body 1 when the mold body 1 is located in the vertical position, it is preferred that the first end of the first arc-shaped slide 22 is located directly above the axis of rotation.

[0054] In the embodiment, the length of the first slide rod 111 extending into the straight slide 21 and the second arc-shaped slide 23, and the length of the second slide rod 121 extending into the first arc-shaped slide 22, are all less than the thickness of the support 24. Preferably, the two supports 24 are provided with baffles 25 on the sides away from each other, which reduces the influence of dust and impurities on the connection positions of the straight slide 21, the first arc-shaped slide 22, the second arc-shaped slide 23, the first slide rod 111 and the second slide rod 121, ensures the durability, and also improves the appearance.

[0055] Preferably, the bracket 2 is further provided with universal wheels 26 at the bottom, which facilitates the overall movement of the molding mold.

[0056] Further, the bracket 2 is further provided with a plurality of clamps 9. In the embodiment, the clamps 9 are provided with four, and the positions need to be ensured: when the first mold plate 11 and the second mold plate 12 are buckled, the mold body 1 can be clamped and positioned by the same or different clamps 9 in the horizontal position and the vertical position, and can also be clamped and positioned by the clamps 9 when the mold body 1 is in an open state, which can be adaptively adjusted and is not limited herein. The structure of the clamp 9 is a prior art, which will not be repeated here.

[0057] Further, as shown in Figure 6 The forming mold further comprises a heating system, the heating system is arranged inside the first mold plate 11 and / or the second mold plate 12, and the heating system comprises at least one heating element 4. The heating element 4 is arranged in the mold body 1 to realize the heating and curing process in the RTM forming process, and the heating element 4 is arranged inside the first mold plate 11 and / or the second mold plate 12 to improve the structural integration of the forming mold and ensure the heating effect.

[0058] In the embodiment, the heating system is arranged inside the first mold plate 11 and the second mold plate 12, which further ensures the heating effect, accelerates the curing process in the RTM forming process, and speeds up the production efficiency. In other embodiments, one of the first mold plate 11 and the second mold plate 12 can be provided with a heating system, which is not limited herein.

[0059] Specifically, taking the first mold plate 11 as an example, a plurality of heating elements 4 are embedded in the inside of the first mold plate 11, and the heating element 4 can be a heating resistance wire. Each heating element 4 is arranged in a U shape, and the plurality of heating elements 4 are uniformly distributed, specifically arranged in uniform intervals along the first direction. The distribution of the heating element 4 in the second mold plate 12 is the same as that in the first mold plate 11, which will not be described herein.

[0060] Preferably, as shown in Figure 6 The forming mold further comprises a cooling system, the cooling system comprises a cooling air duct 5, and the cooling air duct 5 is arranged inside the first mold plate 11 and / or the second mold plate 12. The cooling air duct 5 is arranged in the mold body 1 to realize the cooling process before demolding in the RTM forming process, and the cooling air duct 5 is arranged inside the first mold plate 11 and / or the second mold plate 12 to improve the structural integration of the forming mold and ensure the cooling effect.

[0061] Further, the outer side of the mold body 1 is further provided with a compressed air pipe 51, the compressed air pipe 51 is used for connecting with a gas source, and the compressed air pipe 51 extends towards the cooling air duct 5 and communicates with the cooling air duct 5. The compressed air pipe 51 can be provided with a one-way valve inside to ensure one-way flow of gas. The compressed air pipe 51 is provided with at least one group, each group comprising two compressed air pipes 51, one of which is used for air inlet and the other is used for air outlet.

[0062] In the embodiment, the cooling system is arranged inside the first mold plate 11 and the second mold plate 12, which further ensures the cooling effect, accelerates the cooling process before demolding in the RTM forming process, and speeds up the production efficiency. One set of compressed air pipes 51 is arranged on the first mold plate 11 and the second mold plate 12. In other embodiments, one of the first mold plate 11 and the second mold plate 12 can be provided with a cooling system, which is not limited herein.

[0063] Specifically, as shown in Figure 6 and Figure 7As shown, the first mold plate 11 is internally provided with a cooling air duct 5, which includes two converging air ducts 52 arranged in parallel and extending in the first direction, and a plurality of branch air ducts 53 arranged in communication between the two converging air ducts 52 and perpendicular to the converging air ducts 52, and two compressed air pipes 51 respectively connected to the two converging air ducts 52. Specifically, the plurality of branch air ducts 53 are uniformly and spacedly arranged in the first direction. The cooling air duct 5 in the second mold plate 12 is distributed in the same way as the first mold plate 11, and will not be described here.

[0064] In this embodiment, as shown, Figure 6 The first mold plate 11 includes a mold body 112 and a cover 113, the mold body 112 is rotationally connected to the second mold plate 12 through a rotating shaft 13, and the first slide rod 111 is fixedly connected to the mold body 112. When the first mold plate 11 is buckled with the second mold plate 12, the cover 113 is arranged on the side of the mold body 112 opposite to the second mold plate 12, the side of the mold body 112 facing the cover 113 is provided with the cooling air duct 5 and a heating element accommodating groove 41, and the heating element 4 is arranged in the heating element accommodating groove 41. The heating element accommodating groove 41 is alternately arranged with the branch air duct 53, which further ensures the cooling effect. The cover 113 is provided with an electrical connector 42 capable of being connected to an external power supply to supply power to the heating element 4. The electrical connector 42 is provided with two. The cover 113 and the mold body 112 are detachably connected or welded, which is not limited here. The structure of the second mold plate 12 is similar to that of the first mold plate 11, and will not be described here.

[0065] Preferably, the glue injection port is arranged in the middle of one of the first mold plate 11 and the second mold plate 12, and the glue outlet 32 is arranged in the middle of the other. The positions of the glue injection port and the glue outlet 32 are arranged to facilitate the flow of the molding resin from the middle of the cavity to the periphery, thereby ensuring the quality of the part. When the mold body 1 is in a horizontal position, the glue outlet 32 should be located above to facilitate the discharge of the gas in the cavity from the glue outlet 32. In this embodiment, the glue outlet 32 is arranged on the first mold plate 11, and the glue injection port is arranged on the second mold plate 12. The glue injection port and the glue outlet 32 are arranged with one end protruding from the corresponding cover 113.

[0066] Specifically, as shown, Figure 2As shown, one of the first mold plate 11 and the second mold plate 12 is provided with a fixed core 15 on the inner side, and the other is provided with a shaping plate 18 on the inner side. The shaping plate 18 is provided with a shaping groove 181. The fixed core 15 is annular and has a forming groove in the middle. The glue injection port is communicated with the forming groove, and the glue outlet 32 is communicated with the shaping groove 181. When the first mold plate 11 and the second mold plate 12 are buckled, the fixed core 15 is placed in the shaping groove 181, and the forming groove and the shaping groove 181 form a forming cavity. In this embodiment, the first mold plate 11 is provided with a shaping groove 181 on the inner side, and the second mold plate 12 is provided with a fixed core 15 on the inner side. The fixed core 15 is fixedly connected or detachably connected with the second mold plate 12. That is, when the first mold plate 11 and the second mold plate 12 are buckled, the mold body 112 of the second mold plate 12 is provided with a fixed core 15 on the side opposite to the cover body 113, and the mold body 112 of the first mold plate 11 is fixedly provided with a shaping plate 18 on the side opposite to the cover body 113. The shaping plate 18 can be attached to the second mold plate 12.

[0067] Further, the forming groove in this embodiment is provided with a movable core 16. The forming groove is provided with a positioning pin 17. The positioning pin 17 penetrates the movable core 16 and is used for positioning the movable core 16. The positioning pin 17 is tapered, so that a gap is formed between the movable core 16 and each groove wall of the forming groove. The above gap is a forming cavity, and the dry fiber preform is placed in the gap.

[0068] In the prior art, the fixed core 15, the movable core 16 and the shaping plate 18 are made of metal, and are usually made of aluminum or steel which is light in weight and low in cost. The thermal expansion coefficient of the metal is greater than that of the forming resin. The forming resin needs to be heated and injected into the forming cavity through the glue injection port. Because the thermal expansion coefficient is large, a large gap is formed between the movable core 16 and each groove wall of the forming groove at room temperature, which is convenient for demolding. However, when the mold body 1 is heated, the fixed core 15, the movable core 16 and the shaping plate 18 all expand, so that the size of the forming cavity is small and does not reach the preset size, resulting in that the size of the product obtained by RTM forming is small, and there is a deviation between the actual size of the product and the qualified size of the product, which does not meet the qualified requirements. If the above size deviation is considered when designing the fixed core 15 and the movable core 16, the design difficulty is increased. If the fixed core 15, the movable core 16 and the shaping plate 18 are made of metal materials with the same thermal expansion coefficient as the forming resin, such as invar, the cost is high, and there is no gap between the fixed core 15 and the movable core 16 and the product at room temperature, which is not easy to demold.

[0069] In the embodiment, the thermal expansion coefficient of the shaping plate 18 is the same as that of the molding resin and is smaller than that of the fixed core mold 15. At normal temperature, a large gap can be formed between the fixed core mold 15, the movable core mold 16 and the product, facilitating demolding. When the mold body 1 is heated, the thermal expansion deformation of the groove wall of the shaping groove 181 is reduced, ensuring that the cavity can reach the preset size, thereby ensuring the precision of the size of the product obtained by RTM molding and ensuring the qualification rate.

[0070] Further, as shown in Figure 5 , the molding mold further comprises a pressure collecting piece 7 arranged on the mold body 1 for collecting the pressure in the cavity, facilitating monitoring of the temperature change in the molding process, further ensuring the quality of the part and improving the practicability. The pressure collecting piece 7 is a temperature sensor, and its structure is prior art. One pressure collecting piece 7 is arranged and fixed on the first mold plate 11 or the second mold plate 12, and the measuring end thereof extends into the cavity and needs to avoid the position where the part is formed.

[0071] As a preferred, as shown in Figure 6 , the molding mold further comprises a temperature collecting piece 6 arranged on the mold body 1 for collecting the temperature in the cavity, facilitating monitoring of the temperature change in the molding process, facilitating closed-loop control of the heating system and the cooling system, further ensuring the quality of the part and improving the practicability. The temperature collecting piece 6 is a thermocouple, and its structure is prior art. Four temperature collecting pieces 6 are fixed on the first mold plate 11 and the second mold plate 12, and the four temperature collecting pieces 6 are uniformly distributed. The temperature collecting piece 6 is at least partially embedded in the first mold plate 11 or the second mold plate 12, further ensuring the accuracy of temperature measurement.

[0072] Preferably, as shown in Figure 1 and Figure 2 , the molding mold further comprises a locking assembly 8, the locking assembly 8 comprises a locking piece 81 and a locking hook 82, one of the first mold plate 11 and the second mold plate 12 is provided with the locking piece 81, and the other is provided with the locking hook 82. The locking piece 81 and the locking hook 82 are detachably connected. The locking assembly 8 can ensure the fastening degree between the first mold plate 11 and the second mold plate 12, ensure the part forming process, and the locking piece 81 and the locking hook 82 are detachably connected, which can realize the reuse of the locking assembly 8 and reduce the use cost. Specifically, the structure of the locking piece 81 and the locking hook 82 can adopt prior art, which will not be described here. In other embodiments, the locking piece 81 comprises a connecting lug, a bolt is threaded on the connecting lug, and after the first mold plate 11 and the second mold plate 12 are buckled, the bolt is threaded through the locking hook 82 and screwed with a nut, realizing the buckling and locking between the first mold plate 11 and the second mold plate 12.

[0073] In the embodiment, the first mold plate 11 and the second mold plate 12 of the mold body 1 are in the buckling state, and the locking assembly 8 and the rotating shaft 13 are respectively arranged on the opposite sides of the mold body 1. The side wall of the side of the mold body 1 where the locking assembly 8 is arranged is fixed with the handle 14, so as to facilitate the overturning of the mold body 1. The handle 14 is provided with two, and the two handles 14 are respectively fixed on the first mold plate 11 and the second mold plate 12.

[0074] Obviously, the above embodiment of the present application is only an example for clearly illustrating the present application, and is not a limitation on the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments are not required to be exhausted. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A forming mold for RTM molding, characterized by, The utility model relates to a mold body (1) is connected by the rotation of the first mold plate (11) and the second mold plate (12) of pivot (13), the first mold plate (11) and the second mold plate (12) can be buckled to form a cavity between, the pivot (13) extends along the first direction of horizontal arrangement, the first mold plate (11) is connected with first slide rod (111), the second mold plate (12) is connected with second slide rod (121), first slide rod (111) and second slide rod (121) are not coaxial arrangement and all extend along the first direction, The support (2) is provided with a straight slide (21) and a first arc slide (22), the straight slide (21) extends along the second direction of horizontal arrangement, the first direction is perpendicular to the second direction, the center of the first arc slide (22) is located on the overturning axis arranged along the first direction, the first slide rod (111) is in sliding fit with the straight slide (21), the second slide rod (121) is in sliding fit with the first arc slide (22), the overturning axis can be perpendicular to intersect with the axis of the straight slide (21), when the second slide rod (121) slides along the first arc slide (22) after the first mold plate (11) and the second mold plate (12) are buckled, the mold body (1) can be overturned around the overturning axis, and the mold body (1) can be switched between the vertical position and the horizontal position, The glue injection system is arranged on the mold body (1), the glue injection system includes a glue injection port and a glue outlet (32), and the glue injection port and the glue outlet (32) can communicate with the cavity, The support (2) is further provided with a second arc slide (23), the center of the second arc slide (23) and the first arc slide (22) is located on the overturning axis, the projection of the second arc slide (23) and the first arc slide (22) along the first direction is symmetric about the center of the overturning axis, one end of the second arc slide (23) communicates with the end of the straight slide (21), and the other end extends towards the lower side of the straight slide (21), the first slide rod (111) can enter the second arc slide (23) through the straight slide (21) and be in sliding fit with the second arc slide (23), when the first slide rod (111) is located in the second arc slide (23) and the second slide rod (121) is located in the first arc slide (22), the first mold plate (11) is buckled to the second mold plate (12). The support (2) includes two support members (24) that are parallel and spaced apart along the first direction, the two support members (24) are symmetrically arranged, and the straight slide (21), the first arc slide (22) and the second arc slide (23) are arranged on each support member (24).

2. The forming mold of claim 1, wherein ​ The mold body (1) is arranged between the two support members (24), the first template (11) is provided with the first slide rod (111) on both sides along the first direction, the two first slide rods (111) are coaxially arranged and correspondingly matched with the two straight slide ways (21) or the two second arc-shaped slide ways (23), the second template (12) is provided with the second slide rod (121) on both sides along the first direction, the two second slide rods (121) are coaxially arranged and correspondingly matched with the two first arc-shaped slide ways (22).

3. A forming die according to any one of claims 1-2, characterized in that The forming mold further comprises a heating system, the heating system is arranged in the first template (11) and / or the second template (12), and the heating system comprises at least one heating piece (4).

4. A forming die according to any one of claims 1-2, characterized in that The forming mold further comprises a cooling system, the cooling system comprises a cooling air duct (5), and the cooling air duct (5) is arranged in the first template (11) and / or the second template (12).

5. The forming mold according to any one of claims 1-2, wherein The forming mold further comprises a temperature acquisition piece (6), and the temperature acquisition piece (6) is arranged on the mold body (1) and used for acquiring the temperature in the cavity.

6. The forming mold according to any one of claims 1 to 2, characterized in that, The forming mold further comprises a pressure acquisition piece (7), and the pressure acquisition piece (7) is arranged on the mold body (1) and used for acquiring the pressure in the cavity.

7. The forming mold according to any one of claims 1 to 2, characterized in that, The forming mold further comprises a locking assembly (8), the locking assembly (8) comprises a locking piece (81) and a locking hook (82), one of the first template (11) and the second template (12) is provided with the locking piece (81), and the other is provided with the locking hook (82), and the locking piece (81) and the locking hook (82) are detachably connected.

8. The forming mold according to any one of claims 1 to 2, characterized in that, One of the first template (11) and the second template (12) is provided with a fixed core mold (15) on the inner side, and the other is provided with a shaping plate (18), the shaping plate (18) is concave on the inner side, the fixed core mold (15) is annular and has a forming groove in the middle, the glue injection port is communicated with the forming groove, the glue outlet (32) is communicated with the shaping groove (181), when the first template (11) and the second template (12) are buckled, the fixed core mold (15) is arranged in the shaping groove (181), and the forming groove and the shaping groove (181) form the cavity. The thermal expansion coefficient of the shaping plate is the same as that of the forming resin and is smaller than that of the fixed core mold (15).

9. The forming mold according to any one of claims 1-2, wherein The glue injection port is arranged in the middle of one of the first template (11) and the second template (12), and the glue outlet (32) is arranged in the middle of the other.

Images