Forming die and process of multiple T-shaped ring reinforced U-shaped pressure relief separation guard plate

Abstract

The application discloses a forming die and process of a U-shaped pressure relief separation guard plate with multiple T-shaped reinforcing ribs, relates to the technical field of composite material forming, and discloses the following technical scheme: the forming die comprises a male die, an outer female die, an integral lateral pressing block, multiple reinforcing rib split pre-paving blocks and reinforcing rib split connecting beams; each of the reinforcing rib split pre-paving blocks is provided with a T-shaped connecting groove; the reinforcing rib split connecting beams pass through the T-shaped connecting grooves in sequence to connect and fix the reinforcing rib split pre-paving blocks into a combined pressing block; the U-shaped main body formed by the integral lateral pressing block and the combined pressing block is placed at a die position of the male die; and the integral lateral pressing block and the combined pressing block are provided with the outer female die at the periphery. The application has high integral strength, high reliability and good stability, does not need a post-assembly process, greatly reduces production cost, is suitable for batch production of products, and has a wide application prospect.

Description

Technical Field

[0001] This invention relates to the field of composite material molding technology, specifically to a molding die and process for a U-shaped pressure relief and separation guard plate reinforced with multiple T-shaped ring ribs. Background Technology

[0002] Traditional U-shaped pressure relief separation guard plates reinforced with multiple T-shaped ring ribs are made of metal stainless steel and composite materials. The metal U-shaped pressure relief separation guard plate is too heavy, four times the weight of the composite material. Moreover, the metal processing results in complex irregular surfaces due to the presence of ring ribs, leading to a large workload and high cost.

[0003] Traditional methods for molding composite U-shaped pressure relief separation plates include three approaches: direct metal processing, composite material segmented molding and adhesive bonding assembly, and composite material segmented molding and bolted assembly. First, the U-shaped main body and circumferential T-shaped reinforcing ribs are prepared separately using segmented molding. Then, the U-shaped main body and circumferential T-shaped reinforcing ribs are joined together using adhesive bonding or riveting. Specifically:

[0004] (1) Direct metal processing: Currently, most U-shaped pressure relief separation guards in China are made of metal steel, which has a large overall structural weight, thus increasing the overall weight of the pressure relief separation guard. In addition, since the U-shaped pressure relief separation guard adopts thin-walled outer circumferential reinforcing ribs, the U-shaped pressure relief separation guard has a complex structure, which makes it difficult to process, takes a long time, and is costly. Moreover, it requires the use of whole pieces of raw materials for processing, and most of the raw materials are processed away, resulting in low raw material utilization and high cost. The above manufacturing process will significantly increase the labor and material manufacturing costs of U-shaped pressure relief separation guard products, making it unsuitable for mass production.

[0005] (2) Composite material segmented molding and adhesive bonding assembly: Although there is a segmented molding method in the existing technology that can produce U-shaped pressure relief separation guards with multiple T-shaped circumferential ribs reinforced by composite materials, it requires the parts to be molded first, and then the main body of the U-shaped pressure relief separation guard and multiple circumferential T-shaped ribs are bonded together with structural adhesive. The main drawback of adhesive bonding is that under the action of large external tensile or shear loads, there is a clear interface between the U-shaped main body of the composite material and the multiple circumferential T-shaped ribs, which is prone to breakage. Moreover, this method is complicated, requiring the pre-molding of each component and then the overall adhesive bonding assembly of the product. The products manufactured by the above process have poor stability and reliability, low destructive load, and significantly increased labor and material manufacturing costs, making it unsuitable for mass production.

[0006] (3) Composite material segmented molding and bolted assembly: Although there is a split molding method in the existing technology that can produce U-shaped pressure relief separation guard plate with multiple T-shaped ring ribs reinforced by composite materials, it is necessary to first form the parts and then connect and fix the main body of the U-shaped pressure relief separation guard plate and multiple circumferential T-shaped reinforcing ribs by rivets. The main drawback of connecting by rivets is that since the U-shaped main body of the composite material and the circumferential T-shaped reinforcing ribs are connected by bolts, holes need to be opened on each part of the composite material product body. The holes will break some of the fibers in the composite material body, affecting the overall structural strength of the product. Under the action of increased tensile or shear loads, the load-bearing capacity of the product is significantly reduced.

[0007] Products manufactured using the above processes exhibit poor stability and reliability, low destructive load, and significantly increased labor and material manufacturing costs, making them unsuitable for mass production. To address these issues, it is essential to develop a novel molding die and process for a U-shaped pressure relief and separation guard plate reinforced with multiple T-shaped ring ribs. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the present invention aims to provide a molding die and process for a U-shaped pressure relief and separation guard plate reinforced with multiple T-shaped ring ribs. The structure is reasonably designed, with high overall strength, high reliability, good stability, and no post-assembly process, which greatly reduces production costs. It is suitable for mass production and is highly practical and easy to promote and use.

[0009] To achieve the above objectives, the present invention is implemented through the following technical solution: a molding die for a U-shaped pressure relief and separation guard plate reinforced with multiple T-shaped ring ribs, including a male mold, an outer female mold, an integral lateral pressure block, reinforcing rib segmented pre-laid blocks, and reinforcing rib segmented connecting beams. Multiple reinforcing rib segmented pre-laid blocks are provided, and each reinforcing rib segmented pre-laid block is provided with a T-shaped connecting groove. The reinforcing rib segmented connecting beams pass through each T-shaped connecting groove in sequence to connect and fix the reinforcing rib segmented pre-laid blocks into a combined pressure block. The U-shaped body formed by the integral lateral pressure block and the combined pressure block is placed in the mold position of the male mold, and the outer female mold is placed around the integral lateral pressure block and the combined pressure block.

[0010] Preferably, each reinforcing T-shaped ring rib of the combined structure of the reinforcing rib segmented pre-laid block and the reinforcing rib segmented connecting beam is provided with an overflow groove to facilitate the discharge of gas during curing and prevent material from getting stuck.

[0011] Preferably, the lower side of the male mold is provided with a guide groove for easy positioning. The contact surfaces of the guide groove with the integral lateral pressure block, the reinforcing rib segmented pre-lay block, and the reinforcing rib segmented connecting beam are all slightly curved. The mating surfaces of the combined mold of the integral lateral pressure block, the reinforcing rib segmented pre-lay block, and the reinforcing rib segmented connecting beam with the outer female mold are all slightly curved.

[0012] Preferably, the edge of the integral lateral pressure block is provided with an overflow groove to facilitate the discharge of gas during curing and prevent material from getting stuck.

[0013] Preferably, the external mold is provided with a glue flow channel, which can store the gas and excess glue present during the layup process during the curing process.

[0014] Preferably, the male mold, the female mold, the integral lateral pressure block, the reinforcing rib segmented pre-laid block, and the reinforcing rib segmented connecting beam are all made of P20 steel; the roughness of the contact surfaces of each part of the male mold, the female mold, the integral lateral pressure block, the reinforcing rib segmented pre-laid block, and the reinforcing rib segmented connecting beam is ≤1.6μm.

[0015] The molding process of the U-shaped pressure relief separation guard plate reinforced with multiple T-shaped ring ribs includes the following steps:

[0016] ① Calculate the prepreg dimensions and number of lay-up layers for the overall skin and reinforcing ribs (including the overall covered part) of the product;

[0017] ② Cut the prepreg and lay it onto the reinforcing rib segmented pre-laying block according to the design number of layers. Since the reinforcing rib segmented pre-laying block is half of the entire U-shape, in order to make the reinforcing rib and the U-shaped pressure relief separation guard plate as a whole, the overall wrapping layer needs to be reserved at the same time as laying the reinforcing rib segmented pre-laying block. When assembling the mold in sequence, the layering and wrapping are carried out. Vacuuming is carried out during the layering process to reduce the air bubbles generated in the product during the layering process and improve the product quality.

[0018] ③ Cut the prepreg and lay it onto the positive mold position according to the designed number of layers to ensure product thickness. Vacuuming is carried out during the laying process to reduce air bubbles generated during the laying process and improve product quality.

[0019] ④ Connect the reinforcing rib segmented connecting beam with the connecting groove of each reinforcing rib segmented pre-laid block, place the combined mold on the upper side of the positive mold, and then wrap the reserved overall wrapping material with the upper side of the positive mold.

[0020] ⑤ The overall lateral pressure block, male mold, and assembled mold are reassembled and pressure is applied;

[0021] ⑥ Thermosetting molding;

[0022] ⑦ Demolding.

[0023] As a preferred option, when assembling the mold, the overall wrapping layer reserved for the ring reinforcement is combined with the overall layup layer on the upper side of the male mold to ensure the strength of the ring reinforcement and the overall product.

[0024] As a preferred method, before heat curing, the mold with the prepreg is placed in a vacuum bag and vacuumed; after heat curing, it is demolded when the temperature is reduced to 30-50℃.

[0025] The beneficial effects of this invention are: the mold has high overall strength and simple process, which can effectively combine the reinforcing ring rib and the U-shaped pressure relief plate into one piece, achieving the effect of integral molding. It has high reliability and good stability, and there is no post-assembly process, which greatly reduces labor and material costs. It is suitable for mass production of products and has broad application prospects. Attached Figure Description

[0026] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments;

[0027] Figure 1 This is a schematic diagram of the molding die of the present invention;

[0028] Figure 2 This is a schematic diagram of the male mold in the molding die of the present invention;

[0029] Figure 3 for Figure 2 Top view;

[0030] Figure 4 This is a schematic diagram of the combined structure of the reinforcing rib segmented pre-laid block and the reinforcing rib segmented connecting beam in the molding die of the present invention;

[0031] Figure 5 for Figure 4 Rear view;

[0032] Figure 6 This is a schematic diagram of the combined structure of the integral lateral pressure block, the reinforcing rib segmented pre-laid block, and the reinforcing rib segmented connecting beam in the molding die of the present invention;

[0033] Figure 7 This is a schematic diagram of the overall mold assembly structure of the present invention. Detailed Implementation

[0034] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0035] Reference Figure 1-7The specific implementation adopts the following technical solution: a molding die for a U-shaped pressure relief and separation guard plate reinforced with multiple T-shaped ring ribs, including a male mold 1, an outer female mold 2, an integral lateral pressure block 3, a reinforcing rib segmented pre-laid block 4, and a reinforcing rib segmented connecting beam 5. Multiple reinforcing rib segmented pre-laid blocks 4 are provided, and each reinforcing rib segmented pre-laid block 4 is provided with a T-shaped connecting groove 6. The reinforcing rib segmented connecting beam 5 passes through each T-shaped connecting groove 6 in sequence to connect and fix the reinforcing rib segmented pre-laid blocks 4 into a combined pressure block. The U-shaped body formed by the integral lateral pressure block 3 and the combined pressure block is placed in the mold position of the male mold 1. The outer female mold 2 is placed around the integral lateral pressure block 3 and the combined pressure block.

[0036] It is worth noting that the male mold 1, the outer female mold 2, the integral lateral pressure block 3, the reinforcing rib segmented pre-lay block 4, and the reinforcing rib segmented connecting beam 5 are all made of P20 steel. The roughness of the contact surfaces of each part of the male mold 1, the outer female mold 2, the integral lateral pressure block 3, the reinforcing rib segmented pre-lay block 4, and the reinforcing rib segmented connecting beam 5 is ≤1.6μm, and the roughness of the contact surfaces between each part of the mold and the product is ≤1.6μm.

[0037] In this specific embodiment, the mold structure consists of a male mold 1, an outer female mold 2, an integral lateral pressure block 3, a reinforcing rib segmented pre-laid block 4, and a reinforcing rib segmented connecting beam 5. Specifically:

[0038] (1) Male mold 1: The lower side of the male mold 1 is provided with a guide groove 7 for easy positioning. The contact surface of the guide groove 7 with the overall lateral pressure block 3, the reinforcing rib segmented pre-laid block 4 and the reinforcing rib segmented connecting beam 5 is a slightly angled surface, which ensures that the product length direction pressure mode can be realized simultaneously when the product is pressured on the upper and lower sides.

[0039] (2) External mold 2: External mold 2 is equipped with a glue flow channel, which can prevent the product from being stuck and causing the mold to not close properly, and the space can be used to release gas during the curing process.

[0040] (3) Overall lateral pressure block 3: The edge of the overall lateral pressure block 3 is reserved with an overflow groove to facilitate the discharge of gas and prevent material from being trapped during curing.

[0041] (4) Combined structure of reinforcing rib segmented pre-laid block 4 and reinforcing rib segmented connecting beam 5: First, the prepreg is laid on each reinforcing rib segmented pre-laid block 4, and then the reinforcing rib segmented connecting beam 5 is connected and fixed through the T-shaped connecting groove 6 of the reinforcing rib segmented pre-laid block 4. Each reinforcing T-shaped ring rib position is reserved with an overflow groove to facilitate the discharge of gas during curing and prevent material from being trapped.

[0042] In this specific embodiment, the mold is assembled as a whole. After each layer is laid, the reinforcing rib segmented pre-lay block 4 is connected to the connecting groove of each reinforcing rib segmented pre-lay block 4 through the connecting beam 5. The overall lateral pressure block 3 and the reinforcing rib segmented pre-lay block 4 are placed at the position of the male mold 1 through the connecting beam 5 and positioned by the guide groove 7 on the lower side of the male mold 1. The contact surfaces of the overall lateral pressure block and the combined pressure block with the guide groove of the male mold are all slightly curved. After the combined mold is assembled with the male mold 1, pressure is applied by the upper and lower plates of the press during curing to apply pressure to the mold in the radial and product length directions, so that the gap between the layers of the reinforcing rib segmented pre-lay block 4 gradually decreases to achieve the ideal product size. The contact surfaces of the combined mold of the overall lateral pressure block 3, the reinforcing rib segmented pre-lay block 4 and the reinforcing rib segmented connecting beam 5 with the outer female mold 2 are all slightly curved. When the press applies pressure from the top and bottom, pressure can be applied to the width direction of the product through the contact surfaces. When each pressure plate presses the mold, pressure is applied evenly to each surface. The mold pressure block moves along the width of the product, applying pressure in the width direction to the product, allowing the product to achieve product length (pressure between layers of reinforcing ribs), product width (pressure between layers of U-shaped main body sidewalls), and pressure on the upper and lower parts of the mold (pressure between layers of U-shaped main body upper sidewalls).

[0043] This specific embodiment also discloses a process for forming a U-shaped pressure relief separation guard plate reinforced with multiple T-shaped ring ribs using the above-mentioned mold, the steps of which are as follows:

[0044] ① Calculate the prepreg dimensions and number of lay-up layers for the overall skin and reinforcing ribs (including the overall covered part) of the product;

[0045] ② Cut the prepreg and lay it onto the reinforcing rib segmented pre-laying block 4 according to the design number of layers. Since the reinforcing rib segmented pre-laying block is half of the entire U-shape, in order to make the reinforcing rib and the U-shaped pressure relief separation guard plate as a whole, the overall wrapping layer needs to be reserved while laying the reinforcing rib segmented pre-laying block 4. The layering and wrapping are carried out when assembling the mold in sequence. Vacuuming is carried out during the layering process to reduce the air bubbles generated in the product during the layering process and improve the product quality.

[0046] ③ Cut the prepreg and lay it onto the positive mold position according to the designed number of layers to ensure product thickness. Vacuuming is carried out during the laying process to reduce air bubbles generated during the laying process and improve product quality.

[0047] ④ Connect the reinforcing rib segmented connecting beam 5 with the connecting groove of each reinforcing rib segmented pre-lay block 4, place the combined mold on the upper side of the male mold 1, and then wrap the reserved overall wrapping material with the upper side of the male mold 1.

[0048] ⑤ The overall lateral pressure block 3, male mold 1, and assembled mold are reassembled and pressure is applied;

[0049] ⑥ Thermosetting molding;

[0050] ⑦ Demolding.

[0051] It is worth noting that when assembling the mold, the overall wrapping layer reserved for the ring rib is combined with the overall layup layer on the upper side of the male mold to ensure the strength of the ring rib and the product as a whole.

[0052] In addition, before heat curing, the mold with the prepreg is placed in a vacuum bag and vacuumed; after heat curing, it is demolded when the temperature drops to 30-50℃.

[0053] This specific embodiment ensures overall strength through integral molding, and uses carbon fiber prepreg as the product raw material. Compared with products made of metal steel, the weight is significantly reduced. The weight of the carbon fiber product is about 1 / 4 of that of the metal steel product, which greatly improves the overall weight reduction of the product. Moreover, the production of carbon fiber raw materials can be dimensionally molded, and the overall size of the product can be directly controlled through the mold, reducing the amount of processing and also reducing the utilization rate of raw materials.

[0054] This specific embodiment effectively integrates the reinforcing ring rib with the U-shaped pressure relief plate through a pre-laid segmented structure design, a combined positioning method for the segmented mold, a three-dimensional pressurization design, an overflow groove design, and a special layup molding method, achieving a one-piece molding effect. Its technical advantages are:

[0055] (1) Multi-ring rib reinforced U-shaped pressure relief separation guard plate products can be integrally molded and produced. When the ring rib is under stress, it will be transmitted to the entire U-shaped pressure relief separation guard plate. The product has high overall strength and high reliability.

[0056] (2) Reduce product weight and eliminate post-assembly process, reducing tedious steps and greatly reducing labor costs in production.

[0057] (3) The dimensions and precision of the main body of the workpiece are reliably guaranteed, which greatly improves the molding quality of the product. After the product is formed, it does not need to be repaired and will not split or crack.

[0058] (4) It can regularly and controllably discharge gas and resin from a predetermined position, and the molding process does not require mold transfer. The process is simple, demolding is very easy, and the mold has high reliability and can be used for a long time. It effectively reduces labor and material costs, improves competitiveness, and has broad market application prospects.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A molding die for a U-shaped pressure relief separation guard plate reinforced with multiple T-shaped ring ribs, characterized in that, The system includes a male mold (1), an outer female mold (2), an integral lateral pressure block (3), a reinforcing rib segmented pre-laid block (4), and a reinforcing rib segmented connecting beam (5). Multiple reinforcing rib segmented pre-laid blocks (4) are provided, and each reinforcing rib segmented pre-laid block (4) is provided with a T-shaped connecting groove (6). The reinforcing rib segmented connecting beam (5) passes through each T-shaped connecting groove (6) in sequence to connect and fix the reinforcing rib segmented pre-laid blocks (4) into a combined pressure block. The U-shaped body formed by the integral lateral pressure block (3) and the combined pressure block is placed in the mold position of the male mold (1). The outer female mold (2) is placed around the integral lateral pressure block (3) and the combined pressure block.

2. The molding die for the U-shaped pressure relief and separation guard plate reinforced with multiple T-shaped ring ribs according to claim 1, characterized in that, The reinforced rib pre-laid block (4) and the reinforced rib connecting beam (5) combined structure are provided with overflow grooves at each position of the reinforcing T-shaped ring reinforcement.

3. The molding die for the U-shaped pressure relief and separation guard plate reinforced with multiple T-shaped ring ribs according to claim 1, characterized in that, The lower side of the male mold (1) is provided with a guide groove (7) for easy positioning. The contact surfaces of the guide groove (7) with the integral lateral pressure block (3), the reinforcing rib segmented pre-laid block (4) and the reinforcing rib segmented connecting beam (5) are all slightly inclined surfaces.

4. The molding die for the U-shaped pressure relief and separation guard plate reinforced with multiple T-shaped ring ribs according to claim 1, characterized in that, The combined mold of the integral lateral pressure block (3), the reinforcing rib segmented pre-laid block (4) and the reinforcing rib segmented connecting beam (5) has a slightly curved mating surface with the outer female mold (2).

5. The molding die for the U-shaped pressure relief and separation guard plate reinforced with multiple T-shaped ring ribs according to claim 1, characterized in that, The edge of the integral lateral pressure block (3) is reserved with an overflow groove; the outer female mold (2) is provided with a flow groove.

6. The molding die for the U-shaped pressure relief separation guard plate reinforced with multiple T-shaped ring ribs according to claim 1, characterized in that, The male mold (1), female mold (2), integral lateral pressure block (3), reinforcing rib segmented pre-laid block (4), and reinforcing rib segmented connecting beam (5) are all made of P20 steel. The roughness of the contact surfaces of each part of the male mold (1), female mold (2), integral lateral pressure block (3), reinforcing rib segmented pre-laid block (4), and reinforcing rib segmented connecting beam (5) is ≤1.6μm.

7. The molding die for the U-shaped pressure relief and separation guard plate reinforced with multiple T-shaped ring ribs according to claim 1, characterized in that, Its molding process steps are as follows: ① Calculate the prepreg dimensions and number of layers for the overall skin and reinforcing ribs of the product; ② Cut the carbon fiber prepreg and lay it on the reinforcing rib segmented pre-lay block (4) according to the design number of layers. While laying the reinforcing rib segmented pre-lay block (4), reserve the overall wrapping layer. When assembling the mold in sequence, lay the layers and wrap them. Vacuum is drawn during the laying process. ③ Cut the prepreg and lay it onto the positive mold (1) according to the design number of layers. Vacuuming is carried out during the laying process. ④ Connect the reinforcing rib segmented connecting beam (5) with the T-shaped connecting groove (6) of each reinforcing rib segmented pre-lay block (4), place the combined mold on the upper side of the male mold (1), and then wrap the reserved overall wrapping material with the upper side of the male mold (1). ⑤ The overall lateral pressure block (3), the male mold (1) and the assembled mold are reassembled and pressure is applied; ⑥ Thermosetting molding; ⑦ Demolding.

8. The molding die for the U-shaped pressure relief and separation guard plate reinforced with multiple T-shaped ring ribs according to claim 7, characterized in that, In step ④, when assembling the mold, the overall wrapping layer reserved for the ring rib is combined with the overall layup layer on the upper side of the male mold to ensure the strength of the ring rib and the product as a whole.

9. The molding die for the U-shaped pressure relief separation guard plate reinforced with multiple T-shaped ring ribs according to claim 7, characterized in that, Before heat curing in step ⑥, the mold with the prepreg applied is placed into a vacuum bag and vacuumed.

10. The molding die for the U-shaped pressure relief separation guard plate reinforced with multiple T-shaped ring ribs according to claim 7, characterized in that, After thermosetting in step ⑦, demolding is performed when the temperature is cooled to 30-50℃.

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