Fiber composite directional cover forming device

Abstract

The utility model provides a fiber composite material directional cover forming device, and belongs to the field of fiber composite material design and manufacturing. The problems of directional opening, flexible opening and falling back of the end cover are solved. The device comprises a mold assembly and a foaming tool which are used in cooperation, the mold assembly comprises a mold, a buffer block, a center block, a first pressing ring and four stop blocks, the four stop blocks define a frame, the first pressing ring is placed in the frame, the frame is fixed to the mold, the center block is fixed to the center of the upper surface of the mold, and the center block is fixed to the center of the upper surface of the mold. Eight buffer blocks are evenly arranged on the periphery of the center block in the circumferential direction, the foaming tool is in a groove shape, and a jackscrew hole is formed in the top of the groove. The forming device is easy to install and convenient to disassemble, the forming method is convenient and fast to implement, accuracy is high, and forming and functional implementation of the fiber composite material directional cover are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of fiber composite material design and manufacturing, and in particular relates to a fiber composite material oriented cap forming device. Background Technology

[0002] In recent years, fiber composite materials have been widely used in the aerospace field due to their excellent properties of being lightweight, high-strength, and highly designable. Box-type launch technology can effectively improve the storage reliability, all-weather adaptability, and rapid response capability of equipment systems, and is adopted by various land-based and shipborne equipment. The end caps of the box are an important component of the internal device storage and operation system. Through the sealing of the end caps, the box provides sealing and protection for the internal instruments and equipment during transportation and storage, protecting them from external damage and preventing the leakage of internal inert gases. When the equipment stored inside is removed from the box, the end caps must be able to open promptly without scratching or damaging the equipment during the removal process. Currently, traditional end caps generally use metal mechanical caps or burst caps, which have problems such as slow opening reaction time, accompanying fragmentation, easy scratching of equipment, large weight, and high maintenance costs, which are not conducive to safe and rapid response.

[0003] With the development of equipment, more stringent requirements have been placed on the functionality, lightweighting, and safety of its end caps. This necessitates a lightweight, multifunctional, flexible, directional opening, and tieable end cap to ensure that the end cap can be opened flexibly and directionally when the equipment is removed from the box, without spilling any debris or causing damage to the equipment. After the equipment is removed from the box, the end cap can be flexibly lowered without affecting the equipment's operating posture. Utility Model Content

[0004] In view of this, this utility model proposes a fiber composite material oriented cap molding device and molding method to solve the problems of oriented opening of the end cap, flexible opening and closing, and to achieve lightweight end cap and sealing performance under certain pressure.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a fiber composite material oriented cap molding device, comprising a mold assembly and foaming fixtures used in conjunction.

[0006] The mold assembly includes a mold, a buffer block, a center block, a first pressure ring, and four stop blocks. The four stop blocks form a frame, and the first pressure ring is placed inside the frame. The frame is fixed to the mold. A center block is fixed to the center of the upper surface of the mold, and eight buffer blocks are evenly arranged around the center block.

[0007] The foaming fixture is trough-shaped, with a top screw hole at the top.

[0008] Furthermore, the mold includes a panel and four fixed support legs, with the four fixed support legs installed at the four bottom corners of the panel.

[0009] Furthermore, the mold panel is provided with lifting holes on all sides.

[0010] Furthermore, the buffer block, stop block, and center block are detachably connected to the panel of the mold.

[0011] Furthermore, the first and second pressure rings are used together.

[0012] Furthermore, the area enclosed by the four stops, the first pressure ring, the mold panel, the buffer block, and the center block is the shaping surface.

[0013] Compared with the prior art, the beneficial effects of the fiber composite material oriented cap molding device of this utility model are:

[0014] 1. The fiber composite material oriented cap molding device of this utility model can realize the molding of lightweight foam sandwich composite material oriented cap through a combination molding device and foaming tooling. The 8 buffer blocks, 4 stop blocks and the center block are designed separately and can be flexibly replaced.

[0015] 2. When the cover is subjected to high-temperature airflow impact, the ablation layer of this invention can withstand the high temperature of the airflow. The area formed by the buffer block can buffer the concentrated airflow force. As the impact force of the airflow increases, the stress concentration relief area formed by the central block can alleviate stress concentration within a certain range and decompose the stress along the orientation line. When the impact force reaches the opening threshold, the oriented cover will crack neatly in segments along the orientation line under the action of a certain impact force. Because it is made of fiber composite material, it will open relatively neatly along the orientation line, and there will be no splashing or shattering.

[0016] 3. This utility model uses a foam sandwich layer 4 for buffering and shaping a directional rupture layer. The process of shock absorption is relatively flexible and will not cause damage to the inside of the cover. It effectively solves the problems of directional opening of the end cover, flexible opening and closing.

[0017] 4. The molding device described in this utility model is simple to install and easy to disassemble. The molding method is convenient to implement and highly accurate, realizing the molding and functional realization of fiber composite material oriented caps. Attached Figure Description

[0018] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0019] Figure 1 This is a partial cross-sectional three-dimensional view of the fiber composite material oriented cap molding device of this utility model;

[0020] Figure 2 This is a three-dimensional schematic diagram of the bottom of the mold of the fiber composite material oriented cap molding device of this utility model;

[0021] Figure 3 This is a three-dimensional schematic diagram of the mold assembly of the fiber composite material oriented cap molding device of this utility model;

[0022] Figure 4 This is a three-dimensional schematic diagram of the foaming tooling of the fiber composite material oriented cap molding device of this utility model;

[0023] Figure 5 This is a three-dimensional schematic diagram of the foaming assembly of the fiber composite material oriented cap molding device of this utility model;

[0024] Figure 6 This is a three-dimensional schematic diagram of the foaming tooling demolding of the fiber composite material oriented cap molding device of this utility model;

[0025] Figure 7 This is a three-dimensional schematic diagram of the directional cap forming device for fiber composite materials after the qualitative layer has been formed.

[0026] Figure 8 This is a three-dimensional front view of the composite material oriented cap of the fiber composite material oriented cap molding device of this utility model;

[0027] Figure 9 This is a three-dimensional schematic diagram of the back of the composite material oriented cap of the fiber composite material oriented cap molding device of this utility model;

[0028] Among them, 1-mold, 2-buffer block, 3-center block, 4-foam sandwich layer, 5-directional fracture layer, 6-first pressure ring, 7-second pressure ring, 8-stop block, 9-forming surface, 10-lifting hole, 11-first fixing hole, 12-second fixing hole, 13-third fixing hole, 14-foaming fixture, 15-top screw hole, 16-directional line. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.

[0030] See Figure 1-9 This embodiment describes a fiber composite material oriented cap molding apparatus, including a mold assembly and a foaming fixture 14 used in conjunction.

[0031] The mold assembly includes a mold 1, a buffer block 2, a center block 3, a first pressure ring 6, and four stop blocks 8. The four stop blocks 8 form a frame, and the first pressure ring 6 is placed inside the frame. The frame is fixed to the mold 1. The center block 3 is fixed to the center of the upper surface of the mold 1, and eight buffer blocks 2 are evenly arranged around the center block 3.

[0032] The foaming fixture 14 is trough-shaped, and a top screw hole 15 is provided on the top of the trough.

[0033] The mold 1 includes a panel and four fixed support legs, with the four fixed support legs installed at the four bottom corners of the panel. Each side of the panel of the mold 1 is provided with a lifting hole 10.

[0034] The buffer block 2, the stop block 8, and the center block 3 are detachably connected to the panel of the mold 1.

[0035] The first pressure ring 6 and the second pressure ring 7 are used together.

[0036] The molding method using the fiber composite material oriented cap molding device specifically includes the following steps:

[0037] (1) Clean the mold 1, the 8 buffer blocks 2, the center block 3, the 4 stop blocks 8, and the foaming fixture 14, and apply a layer of release agent;

[0038] (2) Screw the four blocks 8 into the third fixing hole 13 with bolts, screw the eight buffer blocks 2 into the second fixing hole 12 with bolts, and screw the center block 3 into the first fixing hole 11 with bolts. Tighten to complete the mold assembly.

[0039] (3) Place the No. 1 pressure ring 6 in contact with the area enclosed by the stop block 8. This area and the bottom surface combine to form the molding surface 9.

[0040] (4) Spray a layer of ablation material evenly within the area enclosed by the baffle 8, and let it dry at room temperature to form an ablation layer;

[0041] (5) Spray a layer of chopped fiber and resin evenly within the area enclosed by the baffle 8, and then vacuum cure it;

[0042] (6) Remove vacuum auxiliary materials after curing (the isolation film and vacuum film formed by the short-cut fibers and resin in the vacuum curing process are removed after curing, and what is left is the product). Screw the lifting ring into the lifting hole 10, flip the cured mold assembly over and lift it, and place it on the foaming fixture 14;

[0043] (7) Pour the prepared foaming resin evenly into the foaming fixture 14 from both sides of the fixture, let it stand for 1 hour, and after the foaming is complete, lift and flip the assembly of the mold assembly and the foaming fixture 14, screw the top screw into the top screw hole 15, and remove the foaming fixture 14.

[0044] (8) Machining the surface of the foamed layer to form the foam sandwich layer 4;

[0045] (9) Clean the surface of the foam core layer 4, apply a layer of adhesive evenly, lay the cut prepreg material along the orientation line 16 in sequence according to the position, trim and flatten it to form the first oriented fracture layer;

[0046] (10) Repeat the process of applying adhesive and laying prepreg in step 9 on the first directional fracture layer to form the second directional fracture layer;

[0047] (11) Lay another layer of skin according to the position of the skin, and smooth it out;

[0048] (12) Place the No. 2 pressure ring 7 around the skin and place it in contact with the area enclosed by the stop block;

[0049] (13) After vacuum curing, loosen and remove the four blocks 8, demold along the edge of the composite material product, and complete the production of the composite material oriented cover.

[0050] The composite material oriented cover consists of two sequentially laid oriented fracture layers 5 and a skin. The function of the foam core layer 4 is to buffer, reduce weight, and form the shape of the oriented fracture layer 5.

[0051] The entire molding process forms six layers: the first layer is an ablation layer, the second layer is an inner surface fixing layer formed by spraying chopped fibers and curing, the third layer is a foam core layer 4, the fourth layer is the first directional fracture layer, the fifth layer is the second directional fracture layer, and the sixth layer is a skin.

[0052] When the cover is subjected to high-temperature airflow impact, the ablation layer of this invention can withstand the high temperature of the airflow, and the area formed by the buffer block can buffer the concentrated airflow force. As the impact force of the airflow increases, the stress concentration relief area formed by the central block can alleviate stress concentration within a certain range and decompose the stress along the orientation line. When the impact force reaches the opening threshold, the oriented cover cracks neatly in segments along the orientation line under the action of a certain impact force.

[0053] After cracking, the contents inside will pop out from the opening of the lid. During this popping process, if the lid is metal, it will typically shatter explosively, resulting in a sharp fracture. However, this invention, using a fiber composite material, opens more neatly along the directional lines, preventing shattering and fragmentation.

[0054] Meanwhile, this utility model uses a foam sandwich layer 4 for buffering and shaping a directional fracture layer, and the shock absorption process is relatively flexible, so it will not cause damage to the inside of the cover.

[0055] The embodiments of the present invention disclosed above are merely illustrative of the present invention. The embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention.

Claims

1. A fiber composite material oriented cap forming device, characterized in that: This includes the mold assembly and foaming tooling used in conjunction with it (14). The mold assembly includes a mold (1), a buffer block (2), a center block (3), a first pressure ring (6), and four stops (8). The four stops (8) form a frame, and the first pressure ring (6) is placed inside the frame. The frame is fixed on the mold (1). The center block (3) is fixed at the center of the upper surface of the mold (1). Eight buffer blocks (2) are evenly arranged around the center block (3). The foaming fixture (14) is trough-shaped, and a top screw hole (15) is provided on the top of the trough.

2. The fiber composite material oriented cap forming device according to claim 1, characterized in that: The mold (1) includes a panel and four fixed support legs, with four fixed support legs installed at the four bottom corners of the panel.

3. The fiber composite material oriented cap forming device according to claim 2, characterized in that: The side panel of the mold (1) is provided with lifting holes (10).

4. The fiber composite material oriented cap forming device according to claim 2, characterized in that: The buffer block (2), the stop block (8) and the center block (3) are detachably connected to the panel of the mold (1).

5. The fiber composite material oriented cap forming device according to claim 2, characterized in that: The area enclosed by the four stops (8), the first pressure ring (6), the panel of the mold (1), the buffer block (2), and the center block (3) is the shaping surface (9).

6. The fiber composite material oriented cap forming device according to claim 1, characterized in that: The first pressure ring (6) and the second pressure ring (7) are used together.

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