Mixing device and spraying system for continuous fiber reinforced electric box cover

Abstract

The utility model relates to manufacturing equipment of an electric box upper cover, in particular to a mixing device and a spraying system of a continuous fiber reinforced electric box cover. Comprising a storage tank, a stirring tank, a conveying device and a spraying machine, the storage tank is provided with a first feeding pipe and a second feeding pipe, and a weighing device is arranged in the storage tank; the stirring tank comprises a tank body, a tank cover hermetically arranged on the tank body, a lifting device, a stirring shaft and a first rotating motor, a first hose is connected to the bottom of the storage tank, the other end of the first hose is connected to the tank cover, and a first valve is arranged on the first hose; the conveying device comprises a conveying pipe, a spiral conveying shaft and a second rotating motor, a discharging pipe is arranged at the bottom of the tank body, the discharging pipe is connected with the high end of the conveying pipe, the low end of the conveying pipe is connected with the spraying machine through a connecting pipe and supplies materials to the spraying machine, and a second valve is further arranged on the discharging pipe. According to the spraying device, materials can be evenly mixed, the production efficiency is improved, and even spraying work of fiber cloth can be achieved.

Description

Technical Field

[0001] This application relates to manufacturing equipment for the upper cover of an electrical box, particularly a mixing device and a spraying system for a continuously fiber-reinforced electrical box cover. Background Art

[0002] The electrical box cover is an important part of an automotive power battery and is used to seal the electrical box. The raw material for the production of a continuously fiber-reinforced electrical box cover is an epoxy resin-based fiber-reinforced prepreg, which has a relatively high cost. Currently, the process flow of the blank of the electrical box cover is generally to cut the prepreg into sheet materials, roughly lay them manually into the product shape by workers, and then put the pre-laid materials into the mold in a molding press for molding. The molding efficiency is about 5 minutes. There are the following problems: the molding efficiency of the molding press is low, and the labor cost of the laying process is high. In related technologies, isocyanate and polyol resin are used and sprayed on the fiber cloth. The fiber reinforcement is directly produced into a product in the molding process, eliminating the prepreg production link and reducing the prepreg manufacturing cost and consumable cost. Therefore, a production line for realizing this production method is required. Summary of the Invention

[0003] In view of this, this application provides a mixing device for a continuously fiber-reinforced electrical box cover, which can uniformly mix materials and improve production efficiency. It also provides a spraying system for a continuously fiber-reinforced electrical box cover, which can achieve uniform spraying of the fiber cloth.

[0004] To achieve the above object, this application is realized through the following technical solutions:

[0005] A mixing device for a continuously fiber-reinforced electrical box cover, characterized in that: it includes a storage tank, a mixing tank, a conveying device, and a spraying machine; the storage tank has a first feed pipe and a second feed pipe for respectively conveying a first material and a second material, and a weighing device is arranged in the storage tank for weighing the first material and the second material; the mixing tank includes a tank body, a tank cover hermetically arranged on the tank body, a lifting device for driving the tank cover to move up and down, a stirring shaft rotatably arranged on the tank cover for stirring materials, and a first rotating motor for driving the stirring shaft to rotate. The bottom of the storage tank is connected with a first flexible pipe, the other end of the first flexible pipe is connected to the tank cover, and a first valve for selective switching is arranged on the first flexible pipe; the conveying device includes a conveying pipe inclined downward from top to bottom, a spiral conveying shaft rotatably arranged in the conveying pipe for conveying materials from a high place to a low place, and a second rotating motor for driving the spiral conveying shaft to rotate. The bottom of the tank body is provided with a discharge pipe, the discharge pipe is connected to the high end of the conveying pipe, and the low end of the conveying pipe is connected to the spraying machine through a connecting pipe to supply materials to the spraying machine, and a second valve for selective switching is also arranged on the discharge pipe.

[0006] The above-mentioned mixing device for a continuously fiber-reinforced electric box cover of the present application can mix and stir isocyanate (the first material) and polyol resin (the second material) through a stirring tank, and send them to a conveying device for secondary grinding and feeding through a spiral conveying shaft, so that the materials are evenly stirred. Compared with manual mixing, the production efficiency can be improved. Moreover, the stirring tank has a structure with a liftable tank cover, which is convenient for opening the cover for cleaning and maintenance in the later stage.

[0007] In some embodiments, the lifting device includes a fixed frame, a square steel fixedly arranged on the fixed frame, a connection kit fixedly arranged on the tank cover and sleeved on the outer periphery of the square steel, and a lifting mechanism for lifting the connection kit. Two circular guide rails are respectively arranged on the left and right sides of the square steel. Four rollers are arranged in the connection kit and are respectively slidably connected to the circular guide rails. A nut fixedly arranged with the connection kit is arranged in the middle of the square steel. The lifting mechanism is a lead screw fixedly arranged on the fixed frame and threadedly connected to the nut, and a third rotating motor for driving the lead screw to rotate.

[0008] In some embodiments, a first connection disk is fixedly arranged at the bottom of the discharge pipe. The second valve includes a valve body rotatably sleeved on the discharge pipe. A second connection disk is fixedly arranged on the valve body. A third connection disk is fixedly arranged at the upper end of the conveying pipe. The first connection disk, the second connection disk, and the third connection disk are tightly connected by bolts. A bracket extending downward is arranged on the conveying pipe, and a pulley is arranged at the bottom of the bracket. A pulley is arranged on the conveying pipe, and the second valve is a detachable structure between the discharge pipe and the conveying pipe. This is convenient for adjusting the position of the conveying pipe, facilitating docking with the spraying machine, and also facilitating the adjustment of the conveying device when the working position of the spraying machine changes in the later stage.

[0009] The present application also provides a spraying system for a continuously fiber-reinforced electric box cover, which is equipped with the above-mentioned mixing device for a continuously fiber-reinforced electric box cover. It is characterized in that: it further includes a workbench for placing fiber cloth and a grasping mechanism for grasping the fiber cloth on the workbench to under the spraying machine and capable of driving the fiber cloth to move horizontally; the grasping mechanism includes a chuck assembly for grasping the fiber cloth and a six-axis robot connected to the chuck assembly;

[0010] The chuck assembly includes a fixed seat, two movable arms slidably connected to the fixed seat in a manner of moving towards or away from each other, a driving device installed on the fixed seat for driving the two movable arms to move towards or away from each other, and a number of pneumatic chucks fixedly arranged on the two movable arms and capable of opening and closing up and down. Thus, the two movable arms of the chuck assembly can clamp the two side edges of the fiber cloth. The six-axis robot is used to drive the fiber cloth to move under the spraying machine and drive the fiber cloth to move along a preset horizontal trajectory, so that the resin is evenly sprayed on the fiber cloth.

[0011] In the above-mentioned spraying system for a continuously fiber-reinforced electric box lid of the present application, the chuck assembly can clamp the fiber cloth located on the workbench, and the six-axis manipulator can drive the fiber cloth to move below the spraying machine and move horizontally along a preset trajectory. In this way, the resin sprayed by the spraying machine can be evenly arranged on the fiber cloth. Compared with manual grasping, it can reduce the labor intensity and improve the product consistency.

[0012] In some embodiments, the movable arm is slidably connected to the fixed seat through a linear guide rail, and the driving device is two cylinders respectively connected to the two movable arms.

[0013] In some embodiments, a buffer pad is further provided on the fingers of the pneumatic gripper. The buffer pad is mainly used to prevent the pneumatic gripper from damaging the fiber cloth, and the buffer pad can be made of materials such as silica gel and rubber.

[0014] In some embodiments, both the left and right sides of the workbench are of an open structure so that the two movable arms can enter from the left and right for clamping work. A limiting plate that stands upright is provided on one side of the front and back of the workbench to limit the front and back positions of the fiber cloth. The main body of the workbench can be made of steel. In order to ensure that the fiber cloth is placed stably, at least one more plate is provided on the steel, and the plate is bent upward to form the limiting plate.

[0015] It can be seen from the above technical solutions that the present application has at least the following advantages and positive effects:

[0016] In a mixing device for a continuously fiber-reinforced electric box lid of the present application, the isocyanate (the first material) and the polyol resin (the second material) can be mixed and stirred through a mixing tank and sent to a conveying device for secondary grinding and feeding through a spiral conveyor shaft, so that the materials are evenly stirred. Compared with manual mixing, it can improve the production efficiency. Moreover, the mixing tank has a structure with a liftable tank lid, which is convenient for later opening the lid for cleaning and maintenance.

[0017] In the above-mentioned spraying system for a continuously fiber-reinforced electric box lid of the present application, the chuck assembly can clamp the fiber cloth located on the workbench, and the six-axis manipulator can drive the fiber cloth to move below the spraying machine and move horizontally along a preset trajectory. In this way, the resin sprayed by the spraying machine can be evenly arranged on the fiber cloth. Compared with manual grasping, it can reduce the labor intensity and improve the product consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the mixing device in an embodiment of the present application;

[0019] Figure 2 It is a schematic structural diagram of the tank lid part of the mixing tank in an embodiment of the present application;

[0020] Figure 3 is a schematic structural diagram of the conveying device in the embodiment of the present application;

[0021] Figure 4 is a cross-sectional view of the conveying device in the embodiment of the present application;

[0022] Figure 5 is a usage state diagram of the conveying device in the embodiment of the present application during replacement;

[0023] Figure 6 is a schematic structural diagram of the workbench and the manipulator in the embodiment of the present application;

[0024] Figure 7 is Figure 6 an enlarged schematic diagram of part A in;

[0025] Figure 8 is a schematic structural diagram of the workbench in the embodiment of the present application;

[0026] Figure 9 is a working schematic diagram of the grasping mechanism in the embodiment of the present application;

[0027] Figure 10 is a schematic diagram of the spraying trajectory of the resin on the fiber cloth in the embodiment of the present application.

[0028] Reference numeral description: 1. Fiber cloth; 2. Workbench; 21. Limiting plate; 22. Plate; 3. Spraying machine; 4. Grasping mechanism; 41. Chuck assembly; 411. Fixed seat; 412. Moving arm; 413. Driving device; 414. Pneumatic gripper; 4141. Buffer pad; 415. Linear guide rail; 42. Six-axis manipulator; 5. Storage tank; 51. First feed pipe; 52. Second feed pipe; 53. Weighing device; 54. First hose; 55. First valve; 6. Stirring tank; 61. Tank body; 62. Tank cover; 63. Lifting device; 631. Fixed frame; 632. Square steel; 633. Connecting kit; 634. Circular guide rail; 635. Roller; 636. Nut; 64. Stirring shaft; 65. First rotating motor; 66. Discharge pipe; 661. First connecting disc; 67. Second valve; 671. Second connecting disc; 7. Conveying device; 71. Conveying pipe; 711. Third connecting disc; 72. Screw conveyor shaft; 73. Second rotating motor; 74. Bracket; 75. Pulley; 76. Connecting pipe; Detailed implementation manners

[0029] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings. The terms used in the implementation part of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.

[0030] Refer toFigures 1 to 10 In an embodiment of the present application, a spraying system for a continuously fiber-reinforced electric box cover is provided, which includes a mixing device. The mixing device includes a storage tank 5, a stirring tank 6, a conveying device 7, and a spraying machine 3. The storage tank 5 has a first feed pipe 51 and a second feed pipe 52 for respectively conveying a first material and a second material. A weighing device 53 is provided in the storage tank 5 for weighing the first material and the second material. The stirring tank 6 includes a tank body 61, a tank cover 62 hermetically arranged on the tank body 61, a lifting device 63 for driving the tank cover 62 to move up and down, a stirring shaft 64 rotatably arranged on the tank cover 62 for stirring the materials, and a first rotating motor 65 for driving the stirring shaft 64 to rotate. The bottom of the storage tank 5 is connected to a first flexible pipe 54, and the other end of the first flexible pipe 54 is connected to the tank cover 62. A first valve 55 for selective switching is provided on the first flexible pipe 54. The conveying device 7 includes a conveying pipe 71 inclined downward from top to bottom, a spiral conveying shaft 72 rotatably arranged in the conveying pipe 71 for conveying materials from a high place to a low place, and a second rotating motor 73 for driving the spiral conveying shaft 72 to rotate. The bottom of the tank body 61 is provided with a discharge pipe 66, and the discharge pipe 66 is connected to the high-end of the conveying pipe 71. The low-end of the conveying pipe 71 is connected to the spraying machine 3 through a connecting pipe 76 to supply materials to the spraying machine 3. A second valve 67 for selective switching is also provided on the discharge pipe 66.

[0031] With this mixing device, the isocyanate (first material) and the polyol resin (second material) can be mixed and stirred in the stirring tank 6 and then sent to the conveying device 7 for secondary grinding and feeding through the spiral conveying shaft 72, making the materials evenly stirred. Compared with manual mixing, the production efficiency can be improved. Moreover, the stirring tank 6 has a structure in which the tank cover 62 can be lifted, facilitating later opening the cover for cleaning and maintenance.

[0032] The spraying system further includes a workbench 2 for placing the fiber cloth 1 and a gripping mechanism 4 for gripping the fiber cloth on the workbench 2 to below the spraying machine 3 and capable of driving the fiber cloth 1 to move horizontally. The gripping mechanism 4 includes a chuck assembly 41 for gripping the fiber cloth 1 and a six-axis robot 42 connected to the chuck assembly 41.

[0033] The chuck assembly 41 includes a fixed seat 411, two movable arms 412 slidably connected to the fixed seat 411 in a manner of moving towards or away from each other, a driving device 413 installed on the fixed seat 411 for driving the two movable arms 412 to move towards or away from each other, and a number of pneumatic grippers 414 fixedly arranged on the two movable arms 412 and capable of opening and closing up and down. Thus, the two movable arms 412 of the chuck assembly 41 can clamp the two side edges of the fiber cloth 1. The six-axis robot 42 is used to drive the fiber cloth 1 to move below the spraying machine 3 and move the fiber cloth 1 along a preset horizontal trajectory, so that the resin is evenly sprayed on the fiber cloth 1.

[0034] Among them, the fiber cloth 1 located on the workbench 2 can be clamped by the chuck assembly 41, and the six-axis robot 42 can drive the fiber cloth 1 to move below the spraying machine 3 and move the fiber cloth 1 horizontally along a preset trajectory. In this way, the resin sprayed by the spraying machine 3 can be evenly arranged on the fiber cloth 1. Compared with manual grasping, it can reduce the labor intensity and improve the product consistency.

[0035] See Figure 2 , in some embodiments, the lifting device 63 includes a fixed frame 631, a square steel 632 fixedly arranged on the fixed frame 631, a connection kit 633 fixedly arranged on the tank lid 62 and sleeved on the outer periphery of the square steel 632, and a lifting mechanism for lifting the connection kit 633. Two circular guide rails 634 are respectively arranged on the left and right sides of the square steel 632. Four rollers 635 are arranged in the connection kit 633 and are respectively slidably connected to the circular guide rails 634. A nut 636 fixedly arranged with the connection kit 633 is arranged in the middle of the square steel 632. The lifting mechanism is a lead screw fixedly arranged on the fixed frame 631 and threadedly connected to the nut 636 and a third rotating motor for driving the lead screw to rotate.

[0036] See Figures 3 - 5 , a first connection disk 661 is fixedly arranged at the bottom of the discharge pipe 66. The second valve 67 includes a valve body rotatably sleeved on the discharge pipe 66. A second connection disk 671 is fixedly arranged on the valve body. A valve core is arranged in the valve body, and a control handle for controlling the opening and closing of the valve core is arranged outside the valve body. A third connection disk 711 is fixedly arranged at the upper end of the conveying pipe 71. The first connection disk 661, the second connection disk 671, and the third connection disk 711 are fixedly connected by bolts. A bracket 74 extending downward is arranged on the conveying pipe 71, and a pulley 75 is arranged at the bottom of the bracket 74. Preferably, the connecting pipe 76 is a flexible pipe. A pulley 75 is arranged on the conveying pipe 71, and the second valve 67 is a detachable structure between the discharge pipe 66 and the conveying pipe 71. In this way, it is convenient to adjust the position of the conveying pipe 71 and facilitate docking with the spraying machine 3. Refer to Figure 5, and when the working position of the later spraying machine 3 changes, it is also convenient for the conveying device 7 to be adjusted.

[0037] See Figure Figure 9 , in some embodiments, the movable arm 412 is slidably connected to the fixed seat 411 through a linear guide 415, and the driving device 413 is two air cylinders respectively connected to the two movable arms 412.

[0038] See Figure 7 , in some embodiments, a buffer pad 4141 is further provided on the fingers of the pneumatic gripper 414. The buffer pad 4141 is mainly used to prevent the pneumatic gripper 414 from pinching the fiber cloth 1, and the buffer pad 4141 can be made of materials such as silica gel and rubber.

[0039] See Figure 8 , in some embodiments, the left and right sides of the workbench 2 are of an open structure so that the two movable arms 412 can enter from the left and right for clamping work, and a limiting plate 21 standing upright is provided on the front or back side of the workbench 2 to limit the front and back positions of the fiber cloth. The main body of the workbench 2 can be made of steel. In order to ensure the stable placement of the fiber cloth 1, at least one more plate 22 is provided on the steel, and the plate 22 is bent upward to form the limiting plate 21.

[0040] The working process and usage method of the spraying system for a continuous fiber reinforced electric box cover in the above-mentioned embodiment are briefly described below:

[0041] The isocyanate enters through the first feed pipe 51, and the polyol resin enters through the second feed pipe 52 into the storage tank 5. The weighing device 53 determines whether the weights of the two materials meet the requirements of the corresponding formula. By opening the first valve 55, the two materials enter the tank body 61, and the stirring shaft 64 is started for mixing and stirring. After the stirring is completed, the second valve 67 is opened to enter the conveying pipe 71. During the feeding process of the screw conveyor shaft 72, the materials are stirred and ground for the second time, and enter the spraying machine 3 through the connecting pipe 76 for feeding. When the mixing tank 6 needs to be cleaned, the tank cover 62 can be opened upward to open the tank body 61 for cleaning work.

[0042] During the spraying of the fiber cloth 1, the fiber cloth 11 is placed on the workbench 22, the six-axis manipulator 4242 drives the chuck assembly 4141 to move to the position of the fiber cloth 11, the two air cylinders retract, the two movable arms 412412 move relatively closer, move to a suitable position, and the pneumatic fingers clamp the fiber cloth 11. Subsequently, the six-axis manipulator 4242 moves the fiber cloth 11 to below the nozzle of the spraying machine 33, and the six-axis manipulator 4242 moves the fiber cloth 11 horizontally. The specific movement trajectory can be as Figure 10As shown, the resin sprayed by the spraying machine 33 is evenly distributed on the fiber cloth 11. Finally, the six-axis manipulator 4242 sends the fiber cloth 11 sprayed with resin to the next process for molding to make the electric box cover.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them; although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A mixing device for a continuously fiber-reinforced electric box cover, characterized in that: It includes a storage tank, a mixing tank, a conveying device, and a spraying machine; the storage tank has a first feed pipe and a second feed pipe for respectively conveying a first material and a second material, and a weighing device is arranged in the storage tank for weighing the first material and the second material; the mixing tank includes a tank body, a tank cover hermetically arranged on the tank body, a lifting device for driving the tank cover to move up and down, a stirring shaft rotatably arranged on the tank cover for stirring the materials, and a first rotating motor for driving the stirring shaft to rotate. The bottom of the storage tank is connected with a first flexible pipe, and the other end of the first flexible pipe is connected to the tank cover. A first valve for selective switching is arranged on the first flexible pipe; the conveying device includes a conveying pipe inclined downward from top to bottom, a spiral conveying shaft rotatably arranged in the conveying pipe for conveying materials from a high place to a low place, and a second rotating motor for driving the spiral conveying shaft to rotate. An outlet pipe is arranged at the bottom of the tank body, and the outlet pipe is connected to the high-end of the conveying pipe. The low-end of the conveying pipe is connected to the spraying machine through a connecting pipe to supply materials to the spraying machine, and a second valve with a selective switch is also arranged on the outlet pipe.

2. The hybrid device for a continuously fiber-reinforced electric box cover according to claim 1, characterized in that: The lifting device includes a fixed frame, a square steel fixedly arranged on the fixed frame, a connecting kit fixedly arranged on the tank cover and sleeved on the outer periphery of the square steel, and a lifting mechanism for lifting the connecting kit. Two circular guide rails are respectively arranged on the left and right sides of the square steel. Four rollers are arranged in the connecting kit and are respectively slidably connected to the circular guide rails. A nut fixedly arranged with the connecting kit is arranged in the middle of the square steel. The lifting mechanism is a lead screw fixedly arranged on the fixed frame and threadedly connected to the nut and a third rotating motor for driving the lead screw to rotate.

3. The hybrid device for a continuously fiber-reinforced electric box cover according to claim 1, characterized in that: A first connecting disk is fixedly arranged at the bottom of the outlet pipe. The second valve includes a valve body rotatably sleeved on the outlet pipe. A second connecting disk is fixedly arranged on the valve body. A third connecting disk is fixedly arranged at the upper end of the conveying pipe. The first connecting disk, the second connecting disk, and the third connecting disk are tightly connected by bolts. A bracket extending downward is arranged on the conveying pipe, and a pulley is arranged at the bottom of the bracket.

4. A spraying system for a continuously fiber-reinforced electric box cover, which is provided with the mixing device for the continuously fiber-reinforced electric box cover according to any one of the above-mentioned claims 1-3, and is characterized in that: It further includes a workbench for placing a fiber cloth and a grasping mechanism for grasping the fiber cloth on the workbench to below the spraying machine and capable of driving the fiber cloth to move horizontally; the grasping mechanism includes a chuck assembly for grasping the fiber cloth and a six-axis robot connected to the chuck assembly. The chuck assembly includes a fixed seat, two movable arms slidably connected to the fixed seat in a manner of moving towards or away from each other, a driving device arranged on the fixed seat for driving the two movable arms to move towards or away from each other, and a plurality of pneumatic chucks fixedly arranged on the two movable arms and capable of opening and closing up and down. Thus, the two movable arms of the chuck assembly can clamp the two side edges of the fiber cloth. The six-axis robot is used to drive the fiber cloth to move below the spraying machine and drive the fiber cloth to move along a preset horizontal track, so that the resin is evenly sprayed on the fiber cloth.

5. A spraying system for a continuously fiber-reinforced electric box cover according to claim 4, characterized in that: The movable arms are slidably connected to the fixed seat through linear guide rails, and the driving device is two cylinders respectively connected to the two movable arms.

6. The spraying system for a continuously fiber-reinforced electric box cover according to claim 4, characterized in that: A buffer pad is also provided on the fingers of the pneumatic gripper.

7. A spraying system for a continuously fiber-reinforced electric box cover according to claim 4, characterized in that: The left and right sides of the workbench are of an open structure so that two movable arms can enter from the left and right for clamping work. A limiting plate that stands upright is provided on one side of the front and back of the workbench to limit the front and back positions of the fiber cloth.

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