RTM (Resin Transfer Molding) forming mold for furnace test panel

Abstract

The utility model relates to the technical field of RTM molds, in particular to an RTM forming mold for a furnace test panel, which comprises a bottom mold plate, a middle frame and a fixing plate, the bottom mold plate is arranged at the top of the middle frame, the lower part of the bottom mold plate is embedded into the middle frame, and a glue injection hole and a glue outlet hole are formed in the bottom mold plate; the fixed plate is detachably arranged at the bottom of the middle frame; a movable top plate is movably arranged in the middle frame, and a fabric prefabricated body is embedded between the movable top plate and the bottom template; a top plate screw groove is further formed in the bottom of the movable top plate. A plurality of adjusting assemblies connected with the movable top plate are distributed on the fixed plate, each adjusting assembly comprises an adjusting piece and an adjusting gasket, one end of each adjusting piece penetrates through the fixed plate and is connected with the movable top plate, and the adjusting gaskets are arranged on the adjusting pieces in a sleeving mode and located at the bottom of the fixed plate. According to the utility model, furnace test plates with different thicknesses can be conveniently processed, the die does not need to be frequently replaced or an adjusting base plate does not need to be added in the die, and the forming efficiency of the furnace test plates is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of RTM molds, in particular to an RTM forming mold for furnace test plates. Background Art

[0002] The RTM process is a process method in which resin is injected into a closed mold to infiltrate the reinforcing material and solidify it. The RTM process is usually used to manufacture parts with complex shapes. It has the advantages of low cost, short production cycle, and high molding precision. It is usually used in aerospace and other fields. Among them, the RTM process-processed furnace test plates are mainly used for material screening and performance verification in aerospace and other fields.

[0003] The RTM furnace test board molding process is to pour resin into the RTM molding mold, and after the resin solidifies in the RTM molding mold, the furnace test board is formed. The furnace test board is processed using P20 material using the RTM molding mold. In the existing technology, the furnace test board is fixed with the bottom and top templates of the RTM molding mold, which cannot be adjusted at will. The thickness of the processed furnace test board is fixed. In order to process furnace test boards of different thicknesses, adjusting pads are usually added to the mold, which requires a large amount of adjusting pads, resulting in high production costs and low efficiency. There is also a defect that it is difficult to process furnace test boards of different thicknesses. At the same time, due to the gap between the adjusting pad and the mold, the adjusting pad is not easy to remove after the furnace test board is formed. Summary of the Invention

[0004] The utility model aims to solve the problem that the RTM forming mold for furnace test plates in the existing technology is difficult to process furnace test plates of different thicknesses, and provides an RTM forming mold for furnace test plates. The RTM forming mold is convenient for processing furnace test plates of different thicknesses, does not require frequent mold replacement or adding adjustment pads in the mold, and improves the efficiency of furnace test plate forming.

[0005] To achieve the above objectives, the present invention provides a technical solution: a RTM molding mold for a furnace test panel, comprising a bottom template, a middle frame, and a fixed plate. The bottom template is positioned atop the middle frame, with its lower portion embedded within the middle frame. The bottom template is provided with injection and discharge holes. The fixed plate is removably mounted on the bottom of the middle frame. The middle frame, bottom template, and fixed plate cooperate to form a cavity for resin infusion. The injection holes are used to infuse resin during the RTM furnace test panel molding process, and the discharge holes can be used to detect whether the cavity is full of resin.

[0006] A movable top plate is installed inside the middle frame, with a clearance fit between it and the middle frame. A fabric preform is embedded between the movable top plate and the bottom template. Screw grooves are also provided on the bottom of the movable top plate. Adjusting the position of the movable top plate changes the gap between the movable top plate and the bottom template, enabling the processing of furnace test panels of varying thicknesses.

[0007] The fixed plate is provided with a plurality of adjustment assemblies connected to the movable top plate. The adjustment assemblies include adjustment members and adjustment washers. One end of the adjustment member passes through the fixed plate and is connected to the movable top plate. The adjustment washers are sleeved on the adjustment members and located at the bottom of the fixed plate. By using adjustment washers of different thicknesses, the adjustment members can drive the movable top plate to move. That is, the adjustment washers can be used to adjust the distance of movement of the movable top plate, thereby achieving the purpose of adjusting the position of the movable top plate and facilitating the processing of furnace test plates of different thicknesses.

[0008] Furthermore, the cross-section of the bottom template is a "convex" shaped structure, and a plurality of fastening bolts are arranged at intervals on the bottom template. The middle frame is connected to the bottom template and the fixed plate through the fastening bolts. The middle frame is connected to the bottom template and the fixed plate through the action of the fastening bolts to form a cavity for pouring resin.

[0009] Furthermore, side threaded holes are symmetrically opened on both sides of the middle frame, and eye screws are provided at the side threaded holes. The eye screws facilitate lifting the middle frame when assembling the middle frame, and also facilitate lifting the mold after the mold assembly is completed.

[0010] Furthermore, the upper inner portion of the middle frame is provided with an upper inclined surface, with an angle of 3° between the upper inclined surface and the vertical plane; the lower inner portion of the middle frame is provided with a lower inclined surface, with an angle of 2° between the lower inclined surface and the vertical plane. The upper inclined surface mates with the tapered surface of the middle frame and the bottom template, ensuring a close fit during assembly and preventing glue overflow during furnace test plate molding. The lower inclined surface facilitates the installation and alignment of the movable top plate.

[0011] Furthermore, a side sealing groove is provided on the inner side of the middle frame at a position corresponding to the lower inclined surface, and a sealing strip 1 is embedded in the side sealing groove, and the sealing strip 1 is located between the middle frame and the movable top plate; an upper sealing groove with a square structure is provided on the top of the middle frame, and a sealing strip 2 is embedded in the upper sealing groove, and the sealing strip 2 is located between the middle frame and the bottom template. Both the sealing strip 1 and the sealing strip 2 play a sealing role, and the side sealing groove and the upper sealing groove provide installation positions for the sealing strip 1 and the sealing strip 2, respectively.

[0012] Furthermore, a plurality of adjustment through holes are provided on the fixed plate, and the adjustment member is an adjustment bolt, the upper end of the adjustment bolt passes through the adjustment through hole and is threadedly connected to the movable top plate, and the adjustment bolt is slidingly connected to the fixed plate and the adjustment gasket. The adjustment through hole facilitates the connection between the upper end of the adjustment bolt and the movable top plate, so that the position of the movable top plate can be adjusted under the action of the adjustment bolt and the adjustment gasket, thereby achieving the effect of facilitating the processing of furnace test plates of different thicknesses.

[0013] Furthermore, the bottom of the bottom template and the top of the movable top plate are both provided with a chrome plating layer, and the inner wall of the middle frame is also provided with a chrome plating layer. The chrome plating layer can respectively increase the wear resistance of the bottom of the bottom template, the top of the movable top plate and the inner wall of the middle frame.

[0014] Through the above technical solution, the beneficial effects of the utility model are:

[0015] The utility model adopts a split combination structure, which consists of four parts: a bottom template, a middle frame, a fixed plate and a movable top plate. It has a simple structure and is easy to operate. It can facilitate the processing of furnace test plates of different thicknesses. There is no need to frequently replace the mold or add an adjusting pad in the mold, which reduces the production cost and improves the efficiency of the furnace test plate forming. It is applicable, universal and economical.

[0016] The utility model forms a cavity for resin infusion by cooperating with a middle frame, a bottom template and a movable top plate. The glue injection hole is used for infusing resin during the RTM furnace test plate forming process. The glue outlet hole can detect whether the cavity for resin infusion is full of resin. After the resin is cured, it cooperates with the fabric preform to form the furnace test plate.

[0017] The utility model adopts adjustment gaskets of different thicknesses to enable the adjusting bolt to drive the movable top plate to move. By changing the thickness of the adjustment gasket, the movement distance of the movable top plate is adjusted, so as to achieve the purpose of adjusting the position of the movable top plate and changing the gap between the movable top plate and the bottom template, thereby facilitating the processing of furnace test plates of different thicknesses.

[0018] The utility model can ensure that the middle frame and the bottom template fit together during assembly through the action of the upper inclined surface, prevent glue overflow during the molding of the furnace test plate, and facilitate the installation and alignment of the movable top plate through the action of the lower inclined surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of an RTM forming mold for a furnace test plate of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the bottom template of the utility model Figure 1 ;

[0021] Figure 3 This is a schematic diagram of the structure of the bottom template of the utility model Figure 2 ;

[0022] Figure 4 This is a schematic diagram of the structure of the middle frame of the utility model Figure 1 ;

[0023] Figure 5 This is a schematic diagram of the structure of the middle frame of the utility model Figure 2 ;

[0024] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure at A in the middle;

[0025] Figure 7 This is a schematic diagram of the structure of the fixed plate of the utility model Figure 1 ;

[0026] Figure 8 This is a schematic diagram of the structure of the fixed plate of the utility model Figure 2 ;

[0027] Figure 9 This is a schematic diagram of the structure of the movable top plate of the utility model Figure 1 ;

[0028] Figure 10 This is a schematic diagram of the structure of the movable top plate of the utility model Figure 2 .

[0029] The numbers in the accompanying drawings are: 1 is the bottom template, 101 is the glue injection hole, 102 is the glue outlet hole, 2 is the middle frame, 201 is the side threaded hole, 3 is the upper inclined surface, 4 is the lower inclined surface, 5 is the side sealing groove, 6 is the upper sealing groove, 7 is the sealing strip one, 8 is the sealing strip two, 9 is the fixed plate, 901 is the adjustment through hole, 10 is the fastening bolt, 11 is the movable top plate, 12 is the adjusting bolt, 13 is the adjusting gasket, and 14 is the top plate screw groove. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0031] In the description of the present invention, it should be understood that the terms "left", "right", "up", "down", "horizontal", "vertical" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] like Figures 1 to 10As shown, an RTM molding mold for furnace test panels includes a bottom template 1, a middle frame 2 and a fixed plate 9. The bottom template 1 is arranged on the top of the middle frame 2, and the lower part is embedded in the middle frame 2. The bottom template 1 is provided with a glue injection hole 101 and a glue outlet hole 102. The fixed plate 9 is detachably arranged at the bottom of the middle frame 2. In this embodiment, the lower part of the bottom template 1 matches the middle frame 2, the bottom template 1 and the fixed plate 9 are made of P20H material with a heat treatment hardness of HRC30~35, there is one glue injection hole 101 on the bottom template 1, and three glue outlet holes 102. The glue injection hole 101 is used for resin infusion during the RTM furnace test plate molding process, and the glue outlet hole 102 can be used to detect whether it is full of resin. When processing the furnace test plate, the RTM molding mold is placed vertically so that the glue injection hole 101 is located at the bottom and the glue outlet hole 102 is located at the top. Resin is poured into the gap between the bottom template 1 and the movable top plate 11 through the glue injection hole 101. When the resin overflows from the three glue outlet holes 102, the surface resin is filled.

[0033] A movable top plate 11 is movably provided inside the middle frame 2 , and the movable top plate 11 is clearance-matched with the middle frame 2 . A fabric preform is embedded between the movable top plate 11 and the bottom template 1 . A top plate screw groove 14 is also provided at the bottom of the movable top plate 11 . In this embodiment, the middle frame 2 and the movable top plate 11 are also made of P20H material with a heat treatment hardness of HRC30-35. The fabric preform is made of quartz cloth, quartz mesh and high silica cloth. After the resin is cured in the mold, it is combined with the fabric preform to form a furnace test plate. The movable top plate 11 can move up and down in the middle frame 2. The distance of movement of the movable top plate 11 is 0-11 mm. The gap between the movable top plate 11 and the bottom template 1 is changed by moving the movable top plate 11 up and down, thereby achieving the effect of processing furnace test plates of different thicknesses; the top plate screw groove 14 of the movable top plate 11 can be connected with a bolt, which can pass through the fixed plate 9 and be connected to the movable top plate 11. After the resin is cured and the furnace test plate is formed, the adjustment component can be removed, and the movable top plate 11 can be driven to move by the movement of the bolt to achieve the separation of the movable top plate 11 from the middle frame 2, so that the formed furnace test plate can be taken out.

[0034] The fixed plate 9 is provided with a plurality of adjustment assemblies connected to the movable top plate 11. The adjustment assemblies include adjustment members and adjustment washers 13. One end of the adjustment member passes through the fixed plate 9 and is connected to the movable top plate 11. The adjustment washers 13 are sleeved on the adjustment members and are located at the bottom of the fixed plate 9. In this embodiment, there are eight adjustment assemblies. The adjustment washers 13 have circular holes for being sleeved on the adjustment members. By sleeved adjustment washers 13 of different thicknesses on the adjustment members, the position of the movable top plate 11 can be changed, thereby changing the distance between the movable top plate 11 and the bottom plate 1, and achieving the effect of processing furnace test plates of different thicknesses.

[0035] The cross section of the bottom template 1 is in a "convex" structure, a plurality of fastening bolts 10 are arranged on the bottom template 1 at intervals, and the middle frame 2 is connected with the bottom template 1 and the fixed plate 9 through the fastening bolts 10. In the embodiment, the number of the fastening bolts 10 is twelve, and the purpose of the "convex" structure of the lower part of the bottom template 1 is to facilitate the embedding of the lower part in the middle frame 2, so as to avoid the phenomenon of glue overflow.

[0036] The two sides of the middle frame 2 are symmetrically provided with side threaded holes 201, and the lifting ring screws are arranged at the side threaded holes 201. In the embodiment, the number of the side threaded holes 201 on the two sides of the middle frame 2 is two, the lifting ring screws are threadedly connected with the middle frame 2 through the side threaded holes 201, the lifting ring screws are not shown in the figure, and the middle frame 2 is hoisted and assembled through the action of the lifting ring screws. In addition, the whole mold can also be hoisted through the lifting ring screws.

[0037] The upper inclined surface 3 is arranged on the upper part of the inner side of the four perimeters of the middle frame 2, and the included angle between the upper inclined surface 3 and the vertical surface is 3°. The lower inclined surface 4 is arranged on the lower part of the inner side of the four perimeters of the middle frame 2, and the included angle between the lower inclined surface 4 and the vertical surface is 2°. In the embodiment, the bottom template 1 is matched with the middle frame 2 through the upper inclined surface 3, so as to ensure that the middle frame 2 and the bottom template 1 are mutually attached during assembly, and prevent the phenomenon of glue overflow during the forming of the furnace test plate. Through the action of the lower inclined surface 4, the movable top plate 11 is installed and aligned when being installed into the middle frame 2.

[0038] The side sealing groove 5 is arranged at the position corresponding to the lower inclined surface 4 on the inner side of the middle frame 2, the sealing strip one 7 is embedded in the side sealing groove 5, and the sealing strip one 7 is located between the middle frame 2 and the movable top plate 11. The upper sealing groove 6 in a square structure is arranged at the top of the middle frame 2, the sealing strip two 8 is embedded in the upper sealing groove 6, and the sealing strip two 8 is located between the middle frame 2 and the bottom template 1. In the embodiment, the width and the depth of the side sealing groove 5 and the upper sealing groove 6 are 4.8 mm and 4.2 mm respectively, and the sealing strip one 7 and the sealing strip two 8 are both Φ5 mm fluororubber sealing strips. The sealing strip one 7 seals the connection between the middle frame 2 and the movable top plate 11, and the sealing strip two 8 seals the connection between the middle frame 2 and the bottom template 1, so as to prevent the phenomenon of glue overflow during the forming of the furnace test plate.

[0039] The fixed plate 9 is provided with a plurality of adjustment holes 901. The adjustment members are adjustment bolts 12. The upper ends of the adjustment bolts 12 pass through the adjustment holes 901 and are threadedly connected to the movable top plate 11. The adjustment bolts 12 are slidably connected to the fixed plate 9 and the adjustment washers 13. In this embodiment, there are twelve adjustment holes 901, eight of which are used for the adjustment bolts 12 to pass through the fixed plate 9 to connect to the movable top plate 11. The remaining four adjustment holes 901 correspond to the top plate screw grooves 14 and are used to pass the bolts that separate the movable top plate 11 from the middle frame 2.

[0040] The bottom of the bottom template 1 and the top of the movable top plate 11 are both provided with a chrome layer, and the inner sidewall of the middle frame 2 is also provided with a chrome layer. In this embodiment, the chrome layer formed by chrome plating the bottom of the bottom template 1, the top of the movable top plate 11, and the inner sidewall of the middle frame 2 increases wear resistance and extends service life.

[0041] It should be noted that this embodiment can process furnace test plates with a size of 450 mm×450 mm and a thickness of 5 mm to 16 mm.

[0042] The working principle of the present invention is as follows: when it is necessary to process the furnace test plate, the movable top plate 11 and the filling fabric preform are installed in the middle frame 2, and then the middle frame 2, the bottom template 1 and the fixed plate 9 are fixed by fastening bolts 10; then, according to the thickness of the furnace test plate to be processed, the adjusting gasket 13 of the corresponding thickness is set on the adjusting bolt 12, and then the eight adjusting bolts 12 are passed through the adjusting through holes 901 to connect the movable top plate 11.

[0043] The RTM molding mold is then placed vertically so that the injection hole 101 is located at the bottom and the glue outlet hole 102 is located at the top. The movable top plate 11 is moved by adjusting the bolt 12 so that the movable top plate 11 compacts the fabric preform. The gasket 13 is adjusted to contact the fixed plate 9. Then, resin can be poured into the gap between the bottom template 1 and the movable top plate 11 through the injection hole 101. When the resin overflows from the three glue outlet holes 102, the surface resin is filled, and the resin pouring operation is completed. After the resin is solidified, the furnace test plate is processed and formed.

[0044] When the formed furnace test plate needs to be taken out, the bottom template 1 and the eight adjusting bolts 12 are removed, and the four bolts are passed through the adjusting through holes 901 and connected to the movable top plate 11 through the top plate screw grooves 14. The movement of the four bolts drives the movable top plate 11 to move, thereby achieving the separation of the movable top plate 11 from the middle frame 2, thereby achieving the purpose of taking the formed furnace test plate out of the middle frame 2.

[0045] The embodiments described above are only preferred embodiments of the utility model and do not limit the scope of implementation of the utility model. Therefore, any equivalent changes or modifications made according to the technical solutions described in the patent scope of the utility model should be included in the scope of the patent application of the utility model.

Claims

1. An RTM forming mold for furnace test plates, characterized in that: The bottom template (1) comprises a bottom template (1), a middle frame (2) and a fixing plate (9), wherein the bottom template (1) is arranged on the top of the middle frame (2) and the lower portion is embedded in the middle frame (2), the bottom template (1) is provided with a glue injection hole (101) and a glue outlet hole (102), and the fixing plate (9) is detachably arranged on the bottom of the middle frame (2); A movable top plate (11) is movably provided inside the middle frame (2), the movable top plate (11) is clearance-matched with the middle frame (2), and a fabric preform is embedded between the movable top plate (11) and the bottom template (1); a top plate screw groove (14) is also provided at the bottom of the movable top plate (11); The fixed plate (9) is provided with a plurality of adjustment components connected to the movable top plate (11), the adjustment components including an adjustment member and an adjustment gasket (13), one end of the adjustment member passes through the fixed plate (9) and is connected to the movable top plate (11), and the adjustment gasket (13) is sleeved on the adjustment member and located at the bottom of the fixed plate (9).

2. The RTM forming mold for furnace test plate according to claim 1, characterized in that: The cross section of the bottom template (1) is in a convex shape. A plurality of fastening bolts (10) are arranged at intervals on the bottom template (1). The middle frame (2) is connected to the bottom template (1) and the fixing plate (9) via the fastening bolts (10).

3. The RTM forming mold for furnace test plate according to claim 1, characterized in that: Side threaded holes (201) are symmetrically provided on both sides of the middle frame (2), and eye screws are provided at the side threaded holes (201).

4. The RTM forming mold for furnace test plate according to claim 1, characterized in that: An upper inclined surface (3) is provided on the inner upper portion of each of the four sides of the middle frame (2), and the angle between the upper inclined surface (3) and the vertical surface is 3°; a lower inclined surface (4) is provided on the inner lower portion of each of the four sides of the middle frame (2), and the angle between the lower inclined surface (4) and the vertical surface is 2°.

5. The RTM forming mold for furnace test plate according to claim 4, characterized in that: A side sealing groove (5) is provided on the inner side of the middle frame (2) at a position corresponding to the lower inclined surface (4), and a sealing strip (7) is embedded in the side sealing groove (5). The sealing strip (7) is located between the middle frame (2) and the movable top plate (11); an upper sealing groove (6) with a square structure is provided on the top of the middle frame (2), and a sealing strip (8) is embedded in the upper sealing groove (6). The sealing strip (8) is located between the middle frame (2) and the bottom template (1).

6. The RTM forming mold for furnace test plate according to claim 1, characterized in that: The fixed plate (9) is provided with a plurality of adjustment through holes (901), the adjustment member is an adjustment bolt (12), the upper end of the adjustment bolt (12) passes through the adjustment through hole (901) and is threadedly connected to the movable top plate (11), and the adjustment bolt (12) is slidably connected to the fixed plate (9) and the adjustment gasket (13).

7. The RTM forming mold for furnace test plate according to claim 1, characterized in that: The bottom of the bottom template (1) and the top of the movable top plate (11) are both provided with a chrome-plated layer, and the inner side wall of the middle frame (2) is also provided with a chrome-plated layer.

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