A combined mold for composite material molding

Abstract

The application provides a combined die for composite material forming, comprising a first split die, a second split die and a lap joint assembly connecting the first split die and the second split die, wherein: the first split die and the second split die each comprise a forming panel and a combined panel, the combined panel is fixedly arranged at the side of the forming panel, and the height of the platform of the combined panel is different from the height of the platform of the forming panel; the lap joint assembly comprises a lap joint plate and a positioning connecting piece; the positioning connecting piece is used for fixing the lap joint plate between the combined panel of the first split die and the combined panel of the second split die, and the lap joint plate of the lap joint assembly, the forming panel of the first split die and the forming panel of the second split die jointly form the die surface of the combined die. The application connects two split dies by means of the lap joint assembly, guarantees the combination gap quality of the split dies, and avoids affecting the product quality after the composite material forming due to the gap or height difference of the split die combination.

Description

Technical Field

[0001] This invention relates to the field of molds, and more particularly to a combination mold for molding composite materials. Background Technology

[0002] Composite materials possess advantages such as high specific modulus and specific strength, corrosion resistance, high temperature resistance, fatigue resistance, good damping and shock absorption, strong designability, and good dimensional stability, leading to their widespread application in aerospace and other fields. Manufacturing composite component parts requires high-precision molds to ensure the final product's dimensional and positional tolerances (profile accuracy typically within ±0.2). Furthermore, the molds must withstand certain temperature and pressure cycles, possess excellent surface quality, and meet the high requirements for product demolding. Typically, Invar steel is used as the mold material for complex-shaped or large-sized composite products. Invar steel molds are machined to ensure the required dimensional accuracy of the shapes.

[0003] With advancements in composite material applications, parts are becoming increasingly larger, and single-piece mold molding can no longer meet product molding requirements. This significantly reduces the manufacturability of designing single-piece integral molds, substantially increases manufacturing costs, and diminishes convenience during transportation and use. Furthermore, the shapes of increasingly complex composite structural components, such as partially co-cured ribbed panels, necessitate the use of modular molds to meet demolding requirements during product manufacturing, as individual integral molds are insufficient.

[0004] However, modular molds are designed to be manufactured in several parts and then assembled into a complete mold through mechanical connection and other means to form the complete surface of the product. This method involves directly processing two large-sized molds to ensure matching accuracy. It has high requirements for the dimensional accuracy coordination at the mold joint, which can easily produce gaps or height differences, negatively impacting product quality.

[0005] Therefore, it is necessary to develop a combined mold for molding composite materials, which ensures the quality of the joint by processing the overlapping plate and avoids the negative impact on product quality caused by the gap or height difference at the joint of the mold assembly. Summary of the Invention

[0006] The purpose of this invention is to provide a combined mold for molding composite materials. By connecting the combined molds with overlapping plates, the quality of their joints is ensured, and the quality of the molded composite material product is avoided due to gaps or height differences at the joints of the combined mold sections.

[0007] A composite mold for molding composite materials includes a first segmented mold, a second segmented mold, and an overlapping assembly connecting the first segmented mold and the second segmented mold. Both the first and second segmented molds include a molding panel and a composite panel. The composite panel is fixedly disposed on the side of the molding panel, and the height of the platform of the composite panel is different from the height of the platform of the molding panel. The overlapping assembly includes an overlapping plate and a positioning connector. The positioning connector is used to fix the overlapping plate between the composite panel of the first segmented mold and the composite panel of the second segmented mold. The overlapping plate of the overlapping assembly, the molding panel of the first segmented mold, and the molding panel of the second segmented mold together form the profile of the composite mold.

[0008] The beneficial effects of the present invention are as follows: by connecting the first segment mold and the second segment mold with overlapping components, the quality of the joint between the first segment mold and the second segment mold is guaranteed, and the effect of the gap or height difference at the joint between the segment molds affecting the quality of the composite material after molding is avoided.

[0009] In one possible embodiment, the positioning connector includes an externally threaded screw and an internally threaded bolt; both the combined panel of the first and second segmented molds have through holes, which are stepped holes, and the overlapping plate is connected to the stepped holes by the bolts and screws. By screwing in the screws and studs, the overlapping plate is detachably fixed between the segmented molds, thereby forming a complete profile of the combined mold. This allows for repair by replacing the overlapping components when wear occurs at the seams between the segmented molds during use.

[0010] In another possible embodiment, a sealing groove is provided at the connection between the molded panel and the combined panel, and a sealing strip is provided within the sealing groove. The sealing groove and sealing strip on the molded panel can seal the connection gap between the segmented mold and the overlapping plate.

[0011] In another possible embodiment, both the first and second segment molds further include a frame supporting the molded panel, with a reinforcing member extending through the frame, the reinforcing member being positioned relative to the segment molds. The reinforcing member stabilizes the stability between the segment molds, facilitating the subsequent installation of the overlapping plate.

[0012] In another possible embodiment, the molding panel has target holes, and the target holes are located at the end of the molding panel away from the assembly panel. The target holes serve to subsequently inspect the surface of the assembly mold and to project projections onto the surface.

[0013] In one possible embodiment, the frame is rectangular, with lifting points on the shorter side plate and forklift slots on the longer side plate. Transportation can be achieved through the lifting points and forklift slots, ensuring the stability of the mold during transport.

[0014] In one possible embodiment, a pad is provided at the bottom of the frame to stabilize the horizontal position of the combined mold. The pad can be used to accurately locate the horizontal position between the two segmented molds, ensuring the subsequent installation reinforcement results and the precise installation of the overlapping plate. It also prevents the bottom of the frame from being directly contacted, reducing the contact area of ​​the frame and mitigating the impact of uneven placement of the mold. Attached Figure Description

[0015] One or more embodiments are illustrated by way of example with the corresponding pictures in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0016] Figure 1 This is an isometric view of a combined mold for molding composite materials according to the present invention.

[0017] Figure 2 This is an exploded view of a combined mold for molding composite materials according to the present invention;

[0018] Figure 3 This is a schematic diagram of a combined mold for molding a composite material panel according to the present invention;

[0019] Figure 4 This is a schematic diagram of a combined mold overlapping assembly for composite material molding according to the present invention;

[0020] Figure 5 This is a schematic diagram of a combined mold reinforcement assembly for composite material molding according to the present invention.

[0021] Figure Descriptions: 1. Combined mold; 11. First segmented mold; 111. Second segmented mold; 12. Molded panel; 121. Combined panel; 1211. Stepped hole; 122. Sealing groove; 123. Sealing strip; 124. Target hole; 13. Frame structure; 131. Pad; 132. Lifting point; 133. Forklift slot; 2. Overlap assembly; 21. Overlap plate; 22. Stud; 23. Screw; 3. Reinforcing assembly; 31. Support plate; 32. Fixing plate. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art. The terms "comprising" and similar expressions used herein mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, but does not exclude other elements or objects.

[0023] like Figure 1 As shown, this embodiment of the invention provides a composite material molding die, including a first segmented die 11 and a second segmented die 111, which are connected by an overlapping component 2 to form a composite die 1. Specifically, as shown... Figure 2 As shown, both the first segmented mold 11 and the second segmented mold 111 have a frame structure 13. The frame structure 13 is rectangular, and several pads 131 are provided at the bottom of the frame structure 13 to prevent direct contact between the bottom of the frame structure 13 and the mold, thereby reducing the contact area and mitigating the impact of uneven placement. Furthermore, two rectangular through holes are symmetrically opened on opposite side plates along the length of the frame structure 13, and forklift slots 133 are inserted and fixedly connected through these holes. When transporting the first segmented mold 11 or handling the entire combined mold 1, forks can be inserted into the forklift slots 133 for transport. Lifting points 132 are fixedly connected to opposite side plates along the width of the frame structure 13. When the forklift slots 133 are inconvenient to use, the segmented mold 11 or the combined mold 1 can be transported as a whole through the lifting points 132.

[0024] like Figure 2 As shown, both the first segmented mold 11 and the second segmented mold 111 further include a molding panel 12 fixedly connected to the top of the frame structure 13. The surface of the molding panel 12 facing away from the table of the frame structure 13 is a profile. A combined panel 121 is provided on one side of the molding panel 12 along its length, and several through holes are equally spaced along the length of the combined panel 121, such as... Figure 3As shown, the through hole is a stepped hole 1211, with the larger diameter hole of the stepped hole 1211 facing the frame structure 13. When the first segment mold 11 and the second segment mold 111 are subsequently combined, the combined panel 121 is the main component area of ​​the combined area of ​​the two segment molds, and the combined surface of this area is recessed and lower than the profile of the formed panel 12. The recessed combined area and the stepped hole 1211 on the combined panel 121 provide fixing conditions for the overlapping component 2. By connecting the combined mold 1 with the overlapping component 2 in this way, the combined area of ​​the first segment mold 11 and the second segment mold 111 can be pre-processed and assembled. Then, the gap and height difference between the two combined panels 121 can be ensured by grinding and fitting the overlapping component 2. Compared to directly processing two large-size molds to ensure matching accuracy, processing the overlapping component 2 to ensure seam quality significantly reduces production difficulty and costs, and avoids the negative impact on product quality caused by seam gaps or height differences at the mold assembly.

[0025] Furthermore, such as Figure 3 As shown, the combined panel 121 has a sealing groove 122 at the connection point with the molded panel 12, and the sealing groove 122 is parallel to the combined panel 121. A sealing strip 123 is placed in the sealing groove 122, such as... Figure 4 As shown, after the sealing strip 123 is placed, an overlapping component 2 is set on the combination area of ​​the first segment mold 11 and the second segment mold 111. The overlapping component 2 is composed of an overlapping plate 21, a stud 22 and a screw 23. The mounting plate 21 is a long strip plate, and its length is the same as the length of the forming panel 12. The thickness of the overlapping plate 21 is the same as the depth of the recess in the mold combination area. After the first segment mold 11 and the second segment mold 111 are combined, the plate surface of the overlapping plate 21 and the forming panel 12 are on the same plane, so as to meet the requirement of flatness of the combined mold 1. Moreover, the platform of the overlapping plate can meet the precision requirements of the mold surface.

[0026] like Figure 4 As shown, several studs 22 are fixedly connected at equal intervals to the platform of the overlapping plate 21 facing the mold assembly area, and are arranged in two parallel rows. The studs 22 are internally threaded studs, and screws 23 are provided corresponding to them. When the two segmented molds 11 are assembled, the overlapping plate 21 abuts against the two assembly panels 121 in the mold assembly area. The two rows of studs 22 on the overlapping plate 21 are inserted into the stepped holes on the two assembly panels 121, and the screws 23 are threaded into the studs 22 from the larger diameter of the stepped holes. Thus, the overlapping plate 21 presses the two sealing strips vertically and fully, preventing movement of the sealing strips 123 during the assembly of the first segmented mold 11 and the second segmented mold 111, achieving a stable sealing effect under pressure.

[0027] Furthermore, such as Figure 2 As shown, a plurality of target holes 124 for detection and projection are equally spaced on the end of the molding panel 12 away from the sealing groove 122, and a reinforcing component 3 is fixedly connected between the molding panels 12 of the first segment mold 11 and the second segment mold 111, such as... Figure 5 As shown, the reinforcing component 3 consists of a support plate 31 and a fixing plate 32. The support plate 31 is fixedly connected to the surface of the molding panel 12 facing the frame structure 13, while the fixing plate 32 penetrates the frame structure 13 of the first segment mold 11 and the second segment mold 111. The length of the fixing plate 32 is less than the length of the combined mold 1, and it is fixedly connected to the support plate 31. This positions and maintains the distance between the combined panel 121 and the first segment mold 11 and the second segment mold 111, facilitating the precise installation of the overlapping plate 21 for assembly with the first segment mold 11 and the second segment mold 111. During use, if the sharp corners of the first segment mold 11, the second segment mold 111, and the overlapping plate 21 are bumped or worn, the seam quality can be restored by repairing or replacing the overlapping plate 21, overcoming the problem that the edges of the traditional combined first segment mold 11 and the second segment mold 111 cannot be repaired after bumping or wearing.

[0028] While embodiments of the present invention have been described in detail above, it will be apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations fall within the scope and spirit of the invention as set forth in the claims. Furthermore, the invention described herein may have other embodiments and can be implemented or carried out in various ways.

Claims

1. A combination mold for molding composite materials, characterized in that, It includes a first segmented mold, a second segmented mold, and an overlapping assembly connecting the first segmented mold and the second segmented mold, wherein: Both the first segmented mold and the second segmented mold include a forming panel and a combination panel. The combination panel is fixedly disposed on the side of the forming panel, and the height of the table surface of the combination panel is different from the height of the table surface of the forming panel. The overlapping component includes an overlapping plate and a positioning connector; the positioning connector is used to fix the overlapping plate between the combined panel of the first segmented mold and the combined panel of the second segmented mold, and the overlapping plate of the overlapping component, the forming panel of the first segmented mold, and the forming panel of the second segmented mold together form the profile of the combined mold. The positioning connector includes externally threaded screws and internally threaded studs; several studs are fixedly connected to the platform of the overlapping plate facing the mold assembly area, and are fixedly arranged in two parallel rows. The assembly panels of the first and second segment molds are both provided with through holes, which are stepped holes. When the two segment molds are assembled, the overlapping plate abuts against the two assembly panels in the mold assembly area, and the two rows of studs on the overlapping plate are inserted into the stepped holes on the two assembly panels. Then, the screws are threaded into the studs from the larger diameter of the stepped holes.

2. The combined mold according to claim 1, characterized in that, A sealing groove is provided at the connection between the molded panel and the combined panel, and a sealing strip is provided in the sealing groove.

3. The combined mold according to claim 1, characterized in that, The first and second segment molds each include a frame that supports the forming panel, and a reinforcing member is provided through the frame to position the relative positions of the segment molds.

4. The combined mold according to claim 1, characterized in that, The molded panel has a target hole, and the target hole is located at the end of the molded panel away from the combined panel.

5. The combined mold according to claim 3, characterized in that, The frame is rectangular, with lifting points on the shorter side plate and forklift slots on the longer side plate.

6. The combined mold according to claim 3, characterized in that, The bottom of the frame is provided with a pad to fix the position of the combined mold.

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