A method and line for producing high pressure resin transfer molding composite articles

Abstract

The application belongs to the technical field of composite material products, and discloses a production method of a high-pressure resin transfer molding composite material product, which comprises the following steps: step 1, unwinding and cutting; step 2, piece assembly; step 3, piece welding or heat sealing; step 4, heating preforming; step 5, reinforcing corner laying; and step 6, forming blanking. The production line of the application is sequentially provided with a glass fiber cloth roll, an unwinding machine, a cutting machine, a piece feeding device, a truss mechanical hand, welding or heat sealing equipment, a telescopic tunnel type oven, a preforming press, a reinforcing corner laying station and a forming station along the product production flow direction. The application realizes the full-automatic production of the HP-RTM high-pressure resin transfer molding composite material product through the connection and cooperation of the equipment, solves the problem that manual reinforcing corner laying, reinforcing flange edge and reinforcing edge laying have low efficiency and cannot realize automatic production, and increases the work efficiency.

Description

Technical Field

[0001] This invention belongs to the field of composite material product technology, specifically relating to a method and production line for producing high-pressure resin transfer molding composite products. Background Technology

[0002] The existing HP-RTM process requires manual reinforcement of the pre-formed fiber cloth substrate during the production of high-pressure resin transfer molding composite materials. This involves manually applying reinforcing flange edges, edges, and corners. Manual application of these reinforcements is inefficient, resulting in large errors and low consistency in the finished products, thus affecting product quality. To achieve fully automated production and significantly improve efficiency, there is an urgent need to design a new production method and line for high-pressure resin transfer molding composite materials. Summary of the Invention

[0003] In order to solve the above-mentioned problems in the prior art, the present invention aims to provide a method for producing composite products by high-pressure resin transfer molding.

[0004] The technical solution adopted in this invention is as follows:

[0005] A method for producing composite products by high-pressure resin transfer molding includes the following steps:

[0006] Step S1: Unwind and cut

[0007] Manually place the fiberglass cloth rolls onto the unwinding machine in sequence. The material pulling robot clamps the fiberglass cloth and moves it a certain distance toward the cutting machine. The cutting machine then cuts the fiberglass cloth rolls to a fixed length to obtain the fiberglass cloth base. A cutting sheet feeding device is set on one side of the unwinding machine. Four flange edges and four edge edges are prefabricated through the cutting sheet feeding device.

[0008] Step S2, piece assembly

[0009] A truss robot arm is installed above the cutting machine. The truss robot arm moves left and right to grab the cut flange edge and edge, and then moves them to the cut fiberglass cloth substrate, forming a combination of fiberglass cloth substrate, flange edge and edge.

[0010] Step S3, Welding of Cut Pieces

[0011] The assembly was moved together to the welding equipment and glued and welded together.

[0012] Step S4: Heating and preforming

[0013] After the components are pasted together, they are transported to a telescopic tunnel oven for heating. Once the temperature reaches the set process temperature, the telescopic furnace tray of the telescopic tunnel oven sends the components into a preforming press for preforming.

[0014] Step S5: Lay reinforced corner tiles

[0015] Once the preforming meets the requirements, the preforming press is opened, and the hand-shaped robot grabs the preformed body into the corner laying device for reinforcing the corners.

[0016] Step S6: Molding and blanking

[0017] After the pre-formed reinforced corner is laid, the hand-shaped robot grabs the pre-formed body and sends it to the heated mold of the molding press. The molding press presses down, the glue injection machine injects glue under high pressure, and then it is cured and formed. After forming, the unloading robot takes the finished product out of the mold.

[0018] Furthermore, in step S3, the welding equipment is an ultrasonic welding equipment, which uses a welding robot to drive the ultrasonic welding head to perform ultrasonic welding on the assembly, so that the assembly is glued together.

[0019] Furthermore, in step S3, the welding equipment is a heat-sealing welding equipment, which uses a welding robot to drive the heat-sealing head to perform heat-sealing welding on the assembly, so that the assembly is glued together.

[0020] Furthermore, in step S3, the four laying fixtures of the corner laying device open, and four robotic arms grab the reinforcing material sheets pre-placed at the four corners and place them on the laying fixtures. The pressing mechanism on the laying fixtures presses down the reinforcing material sheets, and then flips them towards the corner of the preform. Just before reaching the corner, the L-corner pressure plate on the laying fixture moves down and then back, pressing the reinforcing fiberglass cloth onto the L-shaped heating plate. At this time, the laying fixture presses down towards the corner again. When it is close to the preform, the L-corner pressure plate rises and disengages from the L-shaped heating plate. The laying fixture then moves towards the corner of the preform and fits tightly against the corner, so that the reinforcing fiberglass cloth and the preform are laid. If multiple layers need to be laid, this step can be repeated.

[0021] Furthermore, in step S1, the cutting sheet feeding device is another cutting machine placed next to the cutting machine, and is equipped with another unwinding machine and a fiberglass cloth roll, which is used to pre-cut the four flange edges and four edge edges to the required dimensions.

[0022] Furthermore, in step S2, the truss robot moves left and right to grab the cut flange edges and corners in one go, and then moves them to the cut fiberglass cloth substrate.

[0023] Furthermore, in step S1, the cutting piece feeding device is a cutting piece pre-storage device. The cutting piece pre-storage device is equipped with multiple material frames. The flange edge and the edge edge are placed into the corresponding material frames, and the material frames are placed at the gripping position of the gantry robot.

[0024] Furthermore, in step S2, the truss robot moves left and right to grab the cut flange edges and corners in sequence, and then moves them to the cut fiberglass cloth substrate.

[0025] A high-pressure resin transfer molding composite product production line includes, in sequence along the product production flow direction, a fiberglass fabric roll, an unwinding machine, a cutting machine, a cut sheet feeding device, a gantry robot, welding equipment, a welding robot, a telescopic tunnel oven, a preforming press, a hand-shaped machine, a corner laying device, a molding press, and a blanking machine.

[0026] Furthermore, the truss robot is positioned between the cutting machine and the cutting sheet feeding device, and the welding robot is positioned on top of the welding equipment.

[0027] The beneficial effects of this invention are as follows:

[0028] This invention, through the coordinated operation of various devices, enables fully automated production of HP-RTM high-pressure resin transfer molding composite material products. It solves the problem of low efficiency and inability to automate the manual application of reinforced corners, flange edges, and ridges. The process of reinforcing flange edges and ridges is decomposed into cutting and welding processes, greatly increasing work efficiency and reducing labor intensity. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present invention;

[0030] Figure 2 This is a front view structural diagram of Embodiment 1 of the present invention;

[0031] Figure 3 This is a three-dimensional structural diagram of Embodiment 2 of the present invention;

[0032] Figure 4 This is a front view structural diagram of Embodiment 2 of the present invention;

[0033] Figure 5 A three-dimensional exploded structural diagram of a composite product molded by high-pressure resin transfer molding.

[0034] The attached figures are labeled as follows: 1. Fiberglass fabric roll; 2. Unwinding machine; 3. Truss robot; 4. Cutting machine; 5. Welding robot; 6. Welding equipment; 7. Telescopic tunnel oven; 8. Pre-forming press; 9. Hand-type machine; 10. Corner laying device; 11. Forming press; 12. Material unloading robot; 13. Cutting piece pre-storage device; 14. Fiberglass fabric substrate; 15. Corner; 16. Edge; 17. Flange edge. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] Example 1

[0037] like Figure 1-2 As shown in Figure 5, a high-pressure resin transfer molding composite product production line is provided with the following components arranged sequentially along the product production flow direction: fiberglass fabric roll 1, unwinding machine 2, cutting machine 4, cutting sheet feeding device, gantry robot 3, welding equipment 6, welding robot 5, telescopic tunnel oven 7, preforming press 8, hand-shaped machine 9, corner laying device 10, forming press 11, and unloading machine 12.

[0038] The truss robot 3 is positioned between the cutting machine 4 and the cutting sheet feeding device, and the welding robot 5 is positioned on top of the welding equipment 6.

[0039] A method for producing composite products by high-pressure resin transfer molding includes the following steps:

[0040] Step 1: Unroll and cut

[0041] The fiberglass cloth roll 1 is placed on the unwinding machine 2 in sequence by the manual. The material pulling robot clamps the fiberglass cloth and moves it a certain distance towards the cutting machine 4. The cutting machine 4 cuts the fiberglass cloth roll 1 to a fixed length to obtain the fiberglass cloth base 14. A cutting sheet feeding device is set on one side of the unwinding machine 2. Four flange edges 17 and four edge edges 16 are prefabricated through the cutting sheet feeding device. The cutting sheet feeding device is another cutting machine 4 placed next to the cutting machine 4, and is equipped with another unwinding machine 2 and fiberglass cloth roll 1, which is used to pre-cut the four flange edges 17 and four edge edges 16 to the required size.

[0042] Step 2: Assemble the cut pieces

[0043] A truss robot 3 is installed above the cutting machine 4. The truss robot 3 moves left and right to grab the cut flange edge 17 and edge edge 16 at once, and then moves them to the cut fiberglass cloth substrate 14. At this time, a combination of fiberglass cloth substrate 14, flange edge 17 and edge edge 16 is formed.

[0044] Step 3, Welding of Cut Pieces

[0045] The assembly was moved together to the welding equipment 6, which is an ultrasonic welding equipment 6. The welding robot 5 drove the ultrasonic welding head to perform ultrasonic welding on the assembly, so that the assembly was glued together.

[0046] Step 4: Heating and preforming

[0047] After the assembly is pasted, it is transported together to the telescopic tunnel oven 7 for heating. When the temperature reaches the set process temperature, the telescopic furnace tray of the telescopic tunnel oven 7 sends the assembly into the preforming press 8 for the preforming process.

[0048] Step 5: Lay reinforced corner 15

[0049] After the preforming meets the requirements, the preforming press 8 is opened, and the hand-held robot 9 grabs the preform and places it into the corner laying device 10 for reinforcing the corner 15. The four laying fixtures of the corner laying device 10 are opened, and the four robotic arms grab the reinforcing material sheets that have been placed in the four corners and place them on the laying fixtures. The pressing mechanism on the laying fixtures presses down the reinforcing material sheets, and then flips them toward the corner 15 of the preform. Just before they are in place, the L-corner pressure plate on the laying fixture moves down and then backs up, pressing the reinforcing fiberglass cloth onto the L-shaped heating plate. At this time, the laying fixture presses down again toward the corner 15. When it is close to the preform, the L-corner pressure plate rises up and disengages from the L-shaped heating plate. The laying fixture then moves toward the corner 15 of the preform and presses it tightly against the corner 15, so that the reinforcing fiberglass cloth and the preform are laid. If multiple layers are required, this step can be repeated.

[0050] Step 6: Molding and Blanking

[0051] After the pre-formed reinforced corner 15 is laid, the hand-shaped robot 9 people grab the pre-formed body and send it to the heated mold of the forming press 11. The forming press 11 presses down and the glue injection machine injects glue under high pressure to cure and form. After forming, the unloading robot 12 takes the finished product out of the mold.

[0052] Example 2:

[0053] like Figure 3-4 As shown in Figure 5, this high-pressure resin transfer molding composite product production line is arranged in sequence along the product production flow direction as follows: fiberglass cloth roll 1, unwinding machine 2, cutting machine 4, cutting sheet feeding device, gantry robot 3, welding equipment 6, welding robot 5, telescopic tunnel oven 7, preforming press 8, hand-shaped machine 9, corner laying device 10, molding press 11, and unloading machine 12.

[0054] The truss robot 3 is positioned between the cutting machine 4 and the cutting sheet feeding device, and the welding robot 5 is positioned on top of the welding equipment 6.

[0055] This method for producing high-pressure resin transfer molding composite products includes the following steps:

[0056] Step 1: Unroll and cut

[0057] The fiberglass cloth roll 1 is placed on the unwinding machine 2 in sequence by the manual. The material pulling robot clamps the fiberglass cloth and moves it a certain distance towards the cutting machine 4. The cutting machine 4 cuts the fiberglass cloth roll 1 to a fixed length to obtain the fiberglass cloth base 14. A cutting piece feeding device is set on one side of the unwinding machine 2. Four flange edges 17 and four edge edges 16 are prefabricated through the cutting piece feeding device. The cutting piece feeding device is a cutting piece pre-storage device 13. The cutting piece pre-storage device 13 is equipped with multiple material frames. The flange edges 17 and edge edges 16 are placed into the corresponding material frames, and the material frames are placed at the gripping position of the truss robot 3.

[0058] Step 2: Assemble the cut pieces

[0059] A truss robot 3 is installed above the cutting machine 4. The truss robot 3 moves left and right to grab the cut flange edge 17 and edge edge 16 in sequence, and then moves them to the cut fiberglass cloth substrate 14. At this time, a combination of fiberglass cloth substrate 14, flange edge 17 and edge edge 16 is formed.

[0060] Step 3, Welding of Cut Pieces

[0061] The assembly was moved together to the welding equipment 6, which is a heat sealing welding equipment 6. The welding robot 5 drove the heat sealing head to perform heat sealing welding on the assembly, so that the assembly was glued together.

[0062] Step 4: Heating and preforming

[0063] After the assembly is pasted, it is transported together to the telescopic tunnel oven 7 for heating. When the temperature reaches the set process temperature, the telescopic furnace tray of the telescopic tunnel oven 7 sends the assembly into the preforming press 8 for the preforming process.

[0064] Step 5: Lay reinforced corner 15

[0065] After the preforming meets the requirements, the preforming press 8 is opened, and the hand-held robot 9 grabs the preform and places it into the corner laying device 10 for reinforcing the corner 15. The four laying fixtures of the corner laying device 10 are opened, and the four robotic arms grab the reinforcing material sheets that have been placed in the four corners and place them on the laying fixtures. The pressing mechanism on the laying fixtures presses down the reinforcing material sheets, and then flips them toward the corner 15 of the preform. Just before they are in place, the L-corner pressure plate on the laying fixture moves down and then back, pressing the reinforcing fiberglass cloth onto the L-shaped heating plate. At this time, the laying fixture presses down toward the corner 15 again. When it is close to the preform, the L-corner pressure plate rises and disengages from the L-shaped heating plate. The laying fixture then moves toward the corner 15 of the preform and presses it tightly against the corner 15, so that the reinforcing fiberglass cloth and the preform are laid. If multiple layers are required, this step can be repeated.

[0066] Step 6: Molding and Blanking

[0067] After the pre-formed reinforced corner 15 is laid, the hand-shaped robot 9 people grab the pre-formed body and send it to the heated mold of the forming press 11. The forming press 11 presses down, the glue injection machine injects glue under high pressure and then cures and forms the shape. After forming, the unloading robot 12 takes the finished product out of the mold.

[0068] In summary, the interconnectedness of the various devices in this invention enables fully automated production of HP-RTM high-pressure resin transfer molding composite material products. This solves the problem of low efficiency and inability to automate the manual application of reinforced corners 15, reinforced flange edges 17, and reinforced edges 16. By decomposing the processes of reinforcing flange edges 17 and reinforced edges 16 into cutting and welding processes, work efficiency is greatly increased.

[0069] This invention is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this invention. However, regardless of any changes made in their shape or structure, any technical solution that falls within the scope of the claims of this invention shall be protected by this invention.

Claims

1. A method for producing composite products by high-pressure resin transfer molding, characterized in that, Includes the following steps: Step S1: Unwind and cut Manually place the fiberglass cloth rolls onto the unwinding machine in sequence. The material pulling robot clamps the fiberglass cloth and moves it a certain distance toward the cutting machine. The cutting machine then cuts the fiberglass cloth rolls to a fixed length to obtain the fiberglass cloth base. A cutting sheet feeding device is set on one side of the unwinding machine. Four flange edges and four edge edges are prefabricated through the cutting sheet feeding device. Step S2, piece assembly A truss robot arm is installed above the cutting machine. The truss robot arm moves left and right to grab the cut flange edge and edge, and then moves them to the cut fiberglass cloth substrate, forming a combination of fiberglass cloth substrate, flange edge and edge. Step S3, Welding of Cut Pieces The assembly was moved together to the welding equipment and glued and welded together. Step S4: Heating and preforming After the components are pasted together, they are transported to a telescopic tunnel oven for heating. Once the temperature reaches the set process temperature, the telescopic furnace tray of the telescopic tunnel oven sends the components into a preforming press for preforming. Step S5: Lay reinforced corner tiles Once the preforming meets the requirements, the preforming press is opened, and the hand-shaped robot grabs the preformed body into the corner laying device for reinforcing the corners. Step S6: Molding and blanking After the pre-formed reinforced corner is laid, the hand-held robot picks up the pre-formed body and feeds it into the heated mold of the forming press. The forming press presses down, and the glue injection machine injects glue under high pressure to cure and form the shape. After forming, the unloading robot takes the finished product out of the mold. The four laying fixtures of the corner laying device open, and the four robotic arms pick up the reinforcing material sheets that have been placed in the four corners and place them on the laying fixtures. The clamping mechanism on the laying fixture presses down the reinforcing material sheets, and then flips them towards the corner of the pre-formed body. Just before reaching the corner, the L-corner pressure plate on the laying fixture moves down and then back, pressing the reinforcing fiberglass cloth onto the L-shaped heating plate. At this time, the laying fixture presses down towards the corner again. When it is close to the pre-formed body, the L-corner pressure plate rises and disengages from the L-shaped heating plate. The laying fixture then moves towards the corner of the pre-formed body and presses it tightly against the corner, so that the reinforcing fiberglass cloth and the pre-formed body are laid. If multiple layers are required, this step can be repeated.

2. The method for producing composite products by high-pressure resin transfer molding according to claim 1, characterized in that: In step S3, the welding equipment is an ultrasonic welding equipment. The welding robot drives the ultrasonic welding head to weld or heat seal the assembly, so that the assembly is glued together.

3. The method for producing composite products by high-pressure resin transfer molding according to claim 2, characterized in that: In step S3, the welding equipment is a heat sealing welding equipment. The welding robot drives the ultrasonic heat sealing head to weld or heat seal the assemblies together.

4. The method for producing high-pressure resin transfer molding composite products according to claim 1, characterized in that: In step S1, the cutting sheet feeding device is another cutting machine placed next to the cutting machine, and is equipped with another unwinding machine and fiberglass cloth roll, which is used to pre-cut the four flange edges and four edge edges to the required dimensions.

5. The method for producing high-pressure resin transfer molding composite products according to claim 4, characterized in that: In step S2, the truss robot moves left and right to grab the cut flange edges and corners at once, and then moves them to the cut fiberglass cloth substrate.

6. The method for producing high-pressure resin transfer molding composite products according to claim 1, characterized in that: In step S1, the cutting piece feeding device is a cutting piece pre-storage device. The cutting piece pre-storage device is equipped with multiple material frames. The flange edge and the edge edge are placed into the corresponding material frames, and the material frames are placed at the gripping position of the gantry robot.

7. The method for producing high-pressure resin transfer molding composite products according to claim 6, characterized in that: In step S2, the truss robot moves left and right to grab the cut flange edges and corners in sequence, and then moves them to the cut fiberglass cloth substrate.

8. A high-pressure resin transfer molding composite product production line, applied to the high-pressure resin transfer molding composite product production method according to any one of claims 1-7, characterized in that, Along the product production process, the equipment is arranged in sequence as follows: fiberglass fabric roll, unwinding machine, cutting machine, cut sheet feeding device, truss robot, welding equipment, welding robot, telescopic tunnel oven, preforming press, hand-shaped machine, corner laying device, forming press, and unloading machine.

9. A high-pressure resin transfer molding composite product production line according to claim 8, characterized in that, The truss robot is positioned between the cutting machine and the cutting sheet feeding device, while the welding robot is positioned on top of the welding equipment.

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