High-strength smc low-density material and its production process and its molding equipment

Abstract

The application discloses a kind of high-strength SMC low-density materials and its production process and its forming equipment, belong to SMC low-density material technical field, high-strength SMC low-density material includes lower high-density polyethylene film, upper high-density polyethylene film, modified resin layer and glass fibre layer;The modified resin layer includes the following weight parts of raw materials: polypropylene 44~48 parts, plant straw carbon powder 3~8 parts, melamine 0.8~1.3 parts, hollow microsphere 2~5 parts, foaming agent 0.6~1.2 parts, polyurethane 5~8 parts, auxiliary agent 3~5 parts.By the above mode, the strength of SMC low-density material product is higher by polypropylene, plant straw carbon powder, melamine, hollow microsphere, foaming agent, polyurethane and auxiliary agent are compounded, it is favorable to expand the range of use.By the above mode, the strength of SMC low-density material product is higher by polypropylene, plant straw carbon powder, melamine, hollow microsphere, foaming agent, polyurethane and auxiliary agent are compounded, it is favorable to expand the range of use.The forming equipment of the application can realize the whole process of film transmission, resin paste smearing, glass fibre crushing and uniform laying.

Description

Technical Field

[0001] This invention relates to the field of SMC low-density material technology, specifically to a high-strength SMC low-density material, its production process, and its molding equipment. Background Technology

[0002] SMC low-density material is a molding composite material made by pressing thin films, resin pastes and glass fibers together.

[0003] Chinese patent CN202222600092.X discloses a shredding device for SMC sheet raw materials, including a frame, a shredding roller and a rotating roller 1 rotatably connected to the frame, a blade on the shredding roller, and the end of the blade away from the axis of the shredding roller abutting the rotating roller 1; the frame is also provided with a driving component, which drives the shredding roller and the rotating roller 1 to rotate.

[0004] However, the existing technology still has the following problems: First, it is difficult to realize the entire process of thin film transport, resin paste application, glass fiber crushing and uniform laying; second, it is necessary to improve the raw materials and production process of SMC low-density materials in order to further improve the product strength.

[0005] Based on this, the present invention designs a high-strength SMC low-density material, its production process, and its molding equipment to solve the above problems. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a high-strength SMC low-density material, its production process and molding equipment.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A high-strength SMC low-density material includes a lower high-density polyethylene film, an upper high-density polyethylene film, a modified resin layer, and a glass fiber layer.

[0009] The modified resin layer comprises the following raw materials in parts by weight: 44-48 parts polypropylene, 3-8 parts plant straw carbon powder, 0.8-1.3 parts melamine, 2-5 parts hollow microspheres, 0.6-1.2 parts foaming agent, 5-8 parts polyurethane, and 3-5 parts additives.

[0010] A production process for the aforementioned high-strength SMC low-density material includes the following steps:

[0011] I. Preparation of modified resin paste: Polypropylene, plant straw carbon powder, melamine, hollow microspheres, foaming agent, polyurethane and additives are mixed to obtain modified resin paste;

[0012] 2. The modified resin paste is evenly scraped onto the lower and upper high-density polyethylene films using a molding device. The glass fiber is evenly spread between the lower and upper high-density polyethylene films using the molding device. The lower and upper high-density polyethylene films are then combined to obtain SMC low-density composite material, which is then folded and collected.

[0013] 3. After the SMC low-density composite material has been left to stand, it is cut and then placed in a molding die for molding.

[0014] Furthermore, in step one, the mixing temperature is controlled at 65–73°C, and the mixing time is controlled at 22–38 min.

[0015] Furthermore, in step three, the SMC low-density composite material is placed at 58–62°C for 1–3 hours and then placed at 89–95°C for 25–35 minutes.

[0016] Furthermore, in step three, the sample is placed in a molding die and pressed for 25–35 seconds, with the temperature controlled at 125–141°C.

[0017] A molding device for the production process of the high-strength SMC low-density material includes a first conveying assembly and a second conveying assembly for conveying a lower layer of high-density polyethylene film and an upper layer of high-density polyethylene film, respectively; the second conveying assembly is installed on the upper left end of the first conveying assembly.

[0018] The first conveying assembly is equipped with a glass fiber spreading assembly for uniformly spreading glass fiber between the lower high-density polyethylene film and the upper high-density polyethylene film;

[0019] It also includes a dual-station feeding assembly for uniformly scraping the modified resin paste onto the lower and upper layers of high-density polyethylene film.

[0020] The dual-station feeding assembly includes a feed pipe, a straight cylinder, a distribution hood, a first motor, a discharge pipe, and an auger. The top of the straight cylinder is fixedly connected to the distribution hood, and the bottom of the straight cylinder is fixedly connected to the feed pipe. The top of the distribution hood is fixedly connected to the first motor, and the two ends of the distribution hood are respectively fixedly connected to the discharge pipes. The discharge ends of the discharge pipes are located above the right ends of the second conveying assembly and the first conveying assembly, respectively. The output end of the first motor is fixedly connected to the top of the auger located inside the straight cylinder, and the bottom of the auger is rotatably connected to the bottom wall of the straight cylinder.

[0021] Furthermore, the first conveying assembly includes a first chain conveyor, a first hopper, a first connecting block, a first support frame, a first pressure roller, a first threaded rod, and a first guide rail; the frame of the first chain conveyor is fixedly connected to a first hopper for receiving modified resin paste and for having a gap with the lower high-density polyethylene film so that the modified resin paste is evenly scraped onto the lower high-density polyethylene film conveyed by the first conveying assembly; the first hopper is located below the outlet of a discharge pipe; the front and rear ends of the frame of the first chain conveyor are fixedly connected to the first support frame, and the first threaded rod is rotatably mounted on the first support frame; the first threaded rod is threadedly connected to the first connecting block, and the first connecting block is vertically limited and slidably connected to the first support frame; the front and rear ends of the first pressure roller are fixedly connected to the first connecting block respectively; the first pressure roller is located on the right side of the first hopper.

[0022] Furthermore, the second conveying assembly includes a second chain conveyor, a second hopper, a second threaded rod, a second connecting block, a second guide rail assembly, a second pressure roller, and a second support frame. The frame of the second chain conveyor is fixedly installed on the frame of the first chain conveyor. A second hopper for receiving modified resin paste and for uniformly scraping the modified resin paste onto the upper high-density polyethylene film conveyed by the second chain conveyor is fixedly connected to the frame of the second chain conveyor. The second hopper is located below the outlet of another discharge pipe. The front and rear ends of the frame of the second chain conveyor are fixedly connected to the second support frame. A second threaded rod is rotatably installed on each of the second support frames. A second connecting block is threadedly connected to each of the second threaded rods. The second connecting block is vertically limited and slidably connected to the second support frame. The front and rear ends of the second pressure roller are fixedly connected to the second connecting block, respectively. The second pressure roller is located on the left side of the second hopper.

[0023] Furthermore, the glass fiber paving assembly includes a guide tube, a guide tube mounting plate, a third threaded rod, a first transmission assembly, a rotating roller, a third guide rail assembly, a gear ring, a first horizontal shaft, a second horizontal shaft, a second motor, a second transmission assembly, a mounting circular plate, a toggle rod, a cutter, a pressure block, a third support frame, and an adjusting plate. The front and rear ends of the frame in the middle of the first chain conveyor are fixedly connected to the third support frame. Both ends of the adjusting plate are slidably mounted inside the upper end of the third support frame via the third guide rail assembly. The upper end of the third support frame is threadedly connected to the third threaded rod, the bottom of which is rotatably connected to the top of the adjusting plate. Two sets of meshing gear rings are rotatably mounted on the adjusting plate via the first horizontal shaft. The front and rear sides of the moving roller are fixedly connected to the corresponding first horizontal shafts. The second motor is fixedly mounted on the frame of the first chain conveyor. The drive end of the second motor is connected to the second horizontal shaft through the second transmission assembly. The second horizontal shaft is rotatably mounted on the third support frame, and one end of the second horizontal shaft is fixedly connected to a mounting circular plate. Multiple sets of actuating rods are fixedly connected between the front and rear corresponding mounting circular plates. Multiple sets of pressure blocks and multiple sets of cutters are fixedly connected to the rotating roller in an alternating manner. The two rotating rollers mesh with each other. A guide tube mounting plate is fixedly connected between the front and rear third support frames. Multiple sets of guide tubes are fixedly connected to the guide tube mounting plate. The first horizontal shaft on the rear side and the second horizontal shaft on the rear side are connected through the first transmission assembly.

[0024] Beneficial effects

[0025] This invention enables the entire process of thin film transport, resin paste application, glass fiber crushing, and uniform laying.

[0026] This invention combines polypropylene, plant straw carbon powder, melamine, hollow microspheres, foaming agent, polyurethane and additives to produce SMC low-density material products with higher strength, which is beneficial for expanding the scope of application.

[0027] This invention uses a first chain conveyor to transport a lower layer of high-density polyethylene film. A first hopper holds the modified resin paste, and a gap exists between the modified resin paste and the lower layer of high-density polyethylene film, allowing the modified resin paste to be evenly spread onto the lower layer of high-density polyethylene film transported by the first chain conveyor. A first pressure roller presses and flattens the lower layer of high-density polyethylene film. When adjusting the height of the first pressure roller, the first threaded rods on both sides are rotated simultaneously, causing the first connecting block to move vertically along the first guide rail. The first connecting block then drives the first pressure roller to move vertically.

[0028] This invention uses a second chain conveyor to transport the upper high-density polyethylene film. A second hopper holds the modified resin paste, and a gap exists between the modified resin paste and the upper high-density polyethylene film, allowing the modified resin paste to be evenly scraped onto the upper high-density polyethylene film transported by the second chain conveyor. A second pressure roller presses and flattens the upper high-density polyethylene film. When adjusting the height of the second pressure roller, the second threaded rods on both sides are rotated simultaneously, causing the second connecting block to move vertically along the second guide rail assembly. The second connecting block then drives the second pressure roller to move vertically.

[0029] In this invention, the glass fiber rope is placed in a guide tube. A second motor drives a second horizontal shaft to rotate via a second transmission assembly. The second horizontal shaft, through a mounting plate and a lever, drives a rear second horizontal shaft to rotate. The rear second horizontal shaft, through a first transmission assembly, drives a first horizontal shaft to rotate. The first horizontal shaft, through a rotating roller, drives a front first horizontal shaft to rotate. The first horizontal shaft drives a gear ring to rotate, thereby achieving reverse rotation of the two rotating rollers. The glass fiber rope is squeezed and shredded by the cooperation of a cutter and a pressure block, and then falls to the bottom where it is evenly dispersed by the lever, thus achieving uniform spreading of glass fiber between the lower and upper layers of high-density polyethylene film. When tensioning of the first transmission assembly is required, rotating the third threaded rod drives the adjusting plate to move vertically under the guidance of the third guide rail assembly. The adjusting plate drives the first horizontal shaft to move vertically, thereby achieving the tensioning effect on the first transmission assembly. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0031] Figure 1 The three-dimensional molding equipment of the present invention Figure 1 ;

[0032] Figure 2 This is a front view of the molding equipment of the present invention;

[0033] Figure 3 This is a left view of the molding equipment of the present invention;

[0034] Figure 4 The three-dimensional molding equipment of the present invention Figure 2 ;

[0035] Figure 5 The three-dimensional molding equipment of the present invention Figure 3 ;

[0036] Figure 6The three-dimensional molding equipment of the present invention Figure 4 ;

[0037] Figure 7 For along Figure 2 A sectional view along the AA direction;

[0038] Figure 8 For along Figure 3 BB direction sectional view;

[0039] Figure 9 for Figure 8 Enlarged view of point C in the middle.

[0040] The labels in the diagram represent:

[0041] 1. First conveying assembly; 11. First chain conveyor; 12. First hopper; 13. First connecting block; 14. First support frame; 15. First pressure roller; 16. First threaded rod; 17. First guide rail; 2. Second conveying assembly; 21. Second chain conveyor; 22. Second hopper; 23. Second threaded rod; 24. Second connecting block; 25. Second guide rail assembly; 26. Second pressure roller; 27. Second support frame; 3. Dual-station feeding assembly; 31. Feed pipe; 32. Straight cylinder; 33. Distributor cover; 34. First motor; 35. Discharge pipe; 36. Screw conveyor; 4. Fiberglass paving assembly; 41. Guide tube; 42. Guide tube mounting plate; 43. Third threaded rod; 44. First transmission assembly; 45. Rotating roller; 46. Third guide rail assembly; 47. Gear ring; 48. First horizontal shaft; 49. Second horizontal shaft; 410. Second motor; 411. Second transmission assembly; 412. Mounting circular plate; 413. Actuating lever; 414. Cutter; 415. Pressing block; 416. Third support frame; 417. Adjusting plate. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0043] The present invention will be further described below with reference to embodiments.

[0044] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0045] Example 1

[0046] This embodiment discloses a production process for high-strength SMC low-density material, including the following steps:

[0047] 1. Preparation of modified resin paste: Mix 44 parts of polypropylene, 8 parts of plant straw carbon powder, 0.8 parts of melamine, 5 parts of hollow microspheres, 0.6 parts of foaming agent, 8 parts of polyurethane, and 3 parts of additives. The mixing temperature is controlled at 73℃ and the mixing time is controlled at 22min to obtain the modified resin paste.

[0048] 2. The modified resin paste is evenly scraped onto the lower and upper high-density polyethylene films using a molding device. The glass fiber is evenly spread between the lower and upper high-density polyethylene films using the molding device. The lower and upper high-density polyethylene films are then combined to obtain SMC low-density composite material, which is then folded and collected.

[0049] 3. Place the SMC low-density composite material at 58℃ for 3 hours, then at 89℃ for 35 minutes; then cut it and place it in a molding die for 25 seconds, with the temperature controlled at 141℃.

[0050] This results in a high-strength SMC low-density material consisting of a lower high-density polyethylene film, an upper high-density polyethylene film, a modified resin layer, and a glass fiber layer.

[0051] Example 2

[0052] This embodiment discloses a production process for high-strength SMC low-density material, including the following steps:

[0053] 1. Preparation of modified resin paste: Mix 48 parts of polypropylene, 3 parts of plant straw carbon powder, 1.3 parts of melamine, 2 parts of hollow microspheres, 1.2 parts of foaming agent, 5 parts of polyurethane, and 5 parts of additives. The mixing temperature is controlled at 65℃ and the mixing time is controlled at 38min to obtain the modified resin paste.

[0054] 2. The modified resin paste is evenly scraped onto the lower and upper high-density polyethylene films using a molding device. The glass fiber is evenly spread between the lower and upper high-density polyethylene films using the molding device. The lower and upper high-density polyethylene films are then combined to obtain SMC low-density composite material, which is then folded and collected.

[0055] 3. Place the SMC low-density composite material at 62℃ for 1 hour, then at 95℃ for 25 minutes; then cut it and place it in a molding die for 35 seconds, with the temperature controlled at 125℃.

[0056] This results in a high-strength SMC low-density material consisting of a lower high-density polyethylene film, an upper high-density polyethylene film, a modified resin layer, and a glass fiber layer.

[0057] Example 3

[0058] This embodiment discloses a production process for high-strength SMC low-density material, including the following steps:

[0059] 1. Preparation of modified resin paste: Mix 45 parts of polypropylene, 6 parts of plant straw carbon powder, 0.9 parts of melamine, 4 parts of hollow microspheres, 1 part of foaming agent, 7 parts of polyurethane, and 4 parts of additives. The mixing temperature is controlled at 69℃ and the mixing time is controlled at 28min to obtain the modified resin paste.

[0060] 2. The modified resin paste is evenly scraped onto the lower and upper high-density polyethylene films using a molding device. The glass fiber is evenly spread between the lower and upper high-density polyethylene films using the molding device. The lower and upper high-density polyethylene films are then combined to obtain SMC low-density composite material, which is then folded and collected.

[0061] 3. Place the SMC low-density composite material at 60℃ for 1.3h, then at 91℃ for 29min; then cut it and place it in a molding die for 31s, with the temperature controlled at 130℃.

[0062] This results in a high-strength SMC low-density material consisting of a lower high-density polyethylene film, an upper high-density polyethylene film, a modified resin layer, and a glass fiber layer.

[0063] Example 4

[0064] Please refer to the instruction manual appendix. Figure 1-9 A molding device for the production process of the high-strength SMC low-density material, comprising a first conveying assembly 1 and a second conveying assembly 2 for conveying a lower high-density polyethylene film and an upper high-density polyethylene film respectively; the second conveying assembly 2 is installed on the upper left end of the first conveying assembly 1.

[0065] The first conveying assembly 1 is equipped with a glass fiber spreading assembly 4 for uniformly spreading glass fiber between the lower high-density polyethylene film and the upper high-density polyethylene film;

[0066] It also includes a dual-station feeding assembly 3 for uniformly scraping the modified resin paste onto the lower and upper high-density polyethylene films;

[0067] The dual-station feeding assembly 3 includes a feed pipe 31, a straight cylinder 32, a distribution hood 33, a first motor 34, a discharge pipe 35, and an auger 36. The top of the straight cylinder 32 is fixedly connected to the distribution hood 33, and the lower end of the straight cylinder 32 is fixedly connected to the feed pipe 31. The top of the distribution hood 33 is fixedly connected to the first motor 34, and the two ends of the distribution hood 33 are respectively fixedly connected to the discharge pipes 35. The discharge ends of the two discharge pipes 35 are respectively located above the right end of the second conveying assembly 2 and the first conveying assembly 1. The output end of the first motor 34 is fixedly connected to the top of the auger 36 located inside the straight cylinder 32, and the bottom of the auger 36 is rotatably connected to the bottom wall of the straight cylinder 32.

[0068] The modified resin paste enters the straight cylinder 32 through the feed pipe 31. The first motor 34 drives the auger 36 to rotate. The auger 36 transports the modified resin paste to the distribution hood 33, and then simultaneously transports it to the first conveying assembly 1 and the second conveying assembly 2 through two discharge pipes 35. This invention can realize dual-station feeding of modified resin paste, thereby achieving the uniform scraping of modified resin paste onto the lower and upper high-density polyethylene films conveyed by the first conveying assembly 1 and the second conveying assembly 2.

[0069] The first conveying assembly 1 includes a first chain conveyor 11, a first hopper 12, a first connecting block 13, a first support frame 14, a first pressure roller 15, a first threaded rod 16, and a first guide rail 17. A first hopper 12 is fixedly connected to the frame of the first chain conveyor 11. This hopper is used to hold the modified resin paste and to create a gap between the modified resin paste and the lower high-density polyethylene film, allowing the modified resin paste to be evenly scraped onto the lower high-density polyethylene film conveyed by the first conveying assembly 1. The first hopper 12 is located below the outlet of a discharge pipe 35 and has a strip-shaped outlet. The front and rear ends of the frame of the first chain conveyor 11 are fixedly connected to the first support frame 14. A first threaded rod 16 is rotatably mounted on each of the first support frames 14. A first connecting block 13 is threaded onto each of the first threaded rods 16. The first connecting block 13 is vertically limited and slidably connected to the first support frame 14. The front and rear ends of the first pressure roller 15 are fixedly connected to the first connecting block 13, respectively. The first pressure roller 15 is located on the right side of the first hopper 12.

[0070] The first connecting block 13 and the first support frame 14 are vertically limited and slidably connected by the first guide rail 17. The first guide rail 17 is fixedly installed on the inner wall of the first support frame 14, and the first connecting block 13 and the first guide rail 17 are limited and slidably connected.

[0071] The first chain plate conveyor 11 adopts a mature structure based on existing technology;

[0072] The lower high-density polyethylene film is conveyed by the first chain plate conveyor 11. The modified resin paste is collected by the first material box 12, and the gap between the modified resin paste and the lower high-density polyethylene film allows the modified resin paste to be evenly scraped onto the lower high-density polyethylene film conveyed by the first chain plate conveyor 11. The first pressure roller 15 presses and flattens the lower high-density polyethylene film.

[0073] When adjusting the height of the first pressure roller 15, the first threaded rods 16 on both sides are rotated at the same time to drive the first connecting block 13 to move vertically along the first guide rail 17, and the first connecting block 13 drives the first pressure roller 15 to move vertically.

[0074] The second conveying assembly 2 includes a second chain conveyor 21, a second hopper 22, a second threaded rod 23, a second connecting block 24, a second guide rail assembly 25, a second pressure roller 26, and a second support frame 27. The frame of the second chain conveyor 21 is fixedly mounted on the frame of the first chain conveyor 11. A device for receiving modified resin paste and creating a gap between the modified resin paste and the upper high-density polyethylene film, allowing the modified resin paste to be evenly scraped onto the upper high-density polyethylene film conveyed by the second chain conveyor 21, is fixedly connected to the frame of the second chain conveyor 21. The second material box 22 is located below the discharge port of another discharge pipe 35 and has a strip-shaped discharge port; the front and rear ends of the frame of the second chain plate conveyor 21 are fixedly connected to the second support frame 27, and the second threaded rod 23 is rotatably installed on the second support frame 27. The second threaded rod 23 is threadedly connected to the second connecting block 24, and the second connecting block 24 is vertically limited and slidably connected to the second support frame 27. The front and rear ends of the second pressure roller 26 are fixedly connected to the second connecting block 24 respectively; the second pressure roller 26 is located on the left side of the second material box 22.

[0075] The second connecting block 24 and the second support frame 27 are vertically limited and slidably connected by the second guide rail assembly 25. The second guide rail assembly 25 is fixedly installed on the inner wall of the second support frame 27, and the second connecting block 24 and the second guide rail assembly 25 are limited and slidably connected.

[0076] The second chain plate conveyor 21 adopts a mature structure based on existing technology;

[0077] The upper high-density polyethylene film is conveyed by the second chain plate conveyor 21. The modified resin paste is collected by the second material box 22, and the gap between the modified resin paste and the upper high-density polyethylene film allows the modified resin paste to be evenly scraped onto the upper high-density polyethylene film conveyed by the second chain plate conveyor 21. The second pressure roller 26 presses and flattens the upper high-density polyethylene film.

[0078] When adjusting the height of the second pressure roller 26, the second threaded rods 23 on both sides are rotated at the same time to drive the second connecting block 24 to move vertically along the second guide rail assembly 25, and the second connecting block 24 drives the second pressure roller 26 to move vertically.

[0079] The glass fiber spreading assembly 4 includes a guide tube 41, a guide tube mounting plate 42, a third threaded rod 43, a first transmission assembly 44, a rotating roller 45, a third guide rail assembly 46, a gear ring 47, a first horizontal shaft 48, a second horizontal shaft 49, a second motor 410, a second transmission assembly 411, a mounting circular plate 412, a toggle rod 413, a cutter 414, a pressure block 415, a third support frame 416, and an adjusting plate 417. The front and rear ends of the frame in the middle of the first chain conveyor 11 are fixedly connected to the third support frame 416. Both ends of the adjusting plate 417 are slidably mounted inside the upper end of the third support frame 416 via the third guide rail assembly 46. The upper end of the third support frame 416 is threadedly connected to the third threaded rod 43. The bottom of the third threaded rod 43 is rotatably connected to the top of the adjusting plate 417. Two sets of meshing gear rings 47 are rotatably mounted on the adjusting plate 417 via the first horizontal shaft 48. 7. The front and rear sides of the two rotating rollers 45 are respectively fixedly connected to the corresponding first horizontal shafts 48. The second motor 410 is fixedly installed on the frame of the first chain conveyor 11. The drive end of the second motor 410 is connected to the second horizontal shaft 49 through the second transmission assembly 411. The second horizontal shaft 49 is rotatably installed on the third support frame 416, and one end of the second horizontal shaft 49 is fixedly connected to a mounting circular plate 412. Multiple sets of actuating rods 413 are fixedly connected between the corresponding mounting circular plates 412. Multiple sets of pressure blocks 415 and multiple sets of cutters 414 are fixedly connected to the rotating rollers 45 in an alternating manner. The two rotating rollers 45 mesh with each other. A guide tube mounting plate 42 is fixedly connected between the front and rear third support frames 416. Multiple sets of guide tubes 41 are fixedly connected to the guide tube mounting plate 42. The first horizontal shaft 48 on the rear side and the second horizontal shaft 49 on the rear side are connected through the first transmission assembly 44.

[0080] The fiberglass rope is placed in the guide tube 41. The second motor 410 drives the second horizontal shaft 49 to rotate through the second transmission assembly 411. The second horizontal shaft 49 drives the rear second horizontal shaft 49 to rotate through the mounting plate 412 and the actuating rod 413. The rear second horizontal shaft 49 drives the first horizontal shaft 48 to rotate through the first transmission assembly 44. The first horizontal shaft 48 drives the front first horizontal shaft 48 to rotate through the rotating roller 45. The first horizontal shaft 48 drives the gear ring 47 to rotate, thereby realizing that the two rotating rollers 45 rotate in opposite directions. The fiberglass rope is squeezed and shredded by the cooperation of the cutter 414 and the pressure block 415, and then falls to the bottom and is evenly dispersed by the actuating rod 413, thereby realizing that the fiberglass is evenly spread between the lower layer of high-density polyethylene film and the upper layer of high-density polyethylene film.

[0081] When the first transmission component 44 needs to be tensioned, the third threaded rod 43 is rotated to drive the adjusting plate 417 to move vertically under the guidance of the third guide rail component 46. The adjusting plate 417 drives the first horizontal shaft 48 to move vertically, thereby achieving the tensioning effect on the first transmission component 44.

[0082] The first transmission assembly 44, the third guide rail assembly 46, and the second transmission assembly 411 all adopt existing mature technologies.

[0083] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A molding device for use in the production process of high-strength SMC low-density materials, characterized in that, It includes a first conveying assembly (1) and a second conveying assembly (2) for conveying the lower high-density polyethylene film and the upper high-density polyethylene film respectively; the second conveying assembly (2) is installed on the upper left end of the first conveying assembly (1); The first conveying assembly (1) is equipped with a glass fiber spreading assembly (4) for spreading glass fiber evenly between the lower high-density polyethylene film and the upper high-density polyethylene film. It also includes a dual-station feeding assembly (3) for uniformly scraping the modified resin paste onto the lower and upper high-density polyethylene films. The dual-station feeding assembly (3) includes a feed pipe (31), a straight cylinder (32), a distribution hood (33), a first motor (34), a discharge pipe (35), and an auger (36); the top of the straight cylinder (32) is fixedly connected to the distribution hood (33), the lower end of the straight cylinder (32) is fixedly connected to the feed pipe (31), the top of the distribution hood (33) is fixedly connected to the first motor (34), the two ends of the distribution hood (33) are respectively fixedly connected to the discharge pipe (35), and the discharge end of the discharge pipe (35) is located above the right end of the second conveying assembly (2) and the first conveying assembly (1); the output end of the first motor (34) is fixedly connected to the top of the auger (36) located inside the straight cylinder (32), and the bottom of the auger (36) is rotatably connected to the bottom wall of the straight cylinder (32); The glass fiber paving assembly (4) includes a guide tube (41), a guide tube mounting plate (42), a third threaded rod (43), a first transmission assembly (44), a rotating roller (45), a third guide rail assembly (46), a gear ring (47), a first horizontal shaft (48), a second horizontal shaft (49), a second motor (410), a second transmission assembly (411), a mounting plate (412), a toggle rod (413), a cutter (414), a pressure block (415), a third support frame (416), and an adjusting plate (44). 17); The front and rear ends of the frame in the middle of the first chain plate conveyor (11) are fixedly connected to the third support frame (416). The two ends of the adjusting plate (417) are slidably installed inside the upper end of the third support frame (416) through the third guide rail assembly (46). The upper end of the third support frame (416) is threadedly connected to the third threaded rod (43). The bottom of the third threaded rod (43) is rotatably connected to the top of the adjusting plate (417). Two sets of mutually meshing parts are rotatably installed on the adjusting plate (417) through the first horizontal shaft (48). The gear ring (47) and the front and rear sides of the two rotating rollers (45) are fixedly connected to the corresponding first horizontal shafts (48). The second motor (410) is fixedly installed on the frame of the first chain plate conveyor (11). The drive end of the second motor (410) is connected to the second horizontal shaft (49) through the second transmission assembly (411). The second horizontal shaft (49) is rotatably installed on the third support frame (416), and one end of the second horizontal shaft (49) is fixedly connected to a mounting circular plate (412). The corresponding mounting plates are fixedly connected to the front and rear sides. Multiple sets of actuating rods (413) are fixedly connected between the circular plates (412). Multiple sets of pressure blocks (415) and multiple sets of cutters (414) are fixedly connected to the rotating rollers (45) in an alternating manner. The two rotating rollers (45) mesh with each other. A guide tube mounting plate (42) is fixedly connected between the front and rear third support frames (416). Multiple sets of guide tubes (41) are fixedly connected to the guide tube mounting plate (42). The first horizontal shaft (48) on the rear side and the second horizontal shaft (49) on the rear side are connected by a first transmission assembly (44).

2. The molding equipment according to claim 1, characterized in that, The first conveying assembly (1) includes a first chain conveyor (11), a first hopper (12), a first connecting block (13), a first support frame (14), a first pressure roller (15), a first threaded rod (16), and a first guide rail (17); the frame of the first chain conveyor (11) is fixedly connected to a first hopper (12) for holding modified resin paste and for having a gap with the lower high-density polyethylene film so that the modified resin paste is evenly scraped onto the lower high-density polyethylene film conveyed by the first conveying assembly (1). Located below the discharge port of a discharge pipe (35); the front and rear ends of the frame of the first chain plate conveyor (11) are fixedly connected to the first support frame (14), the first threaded rod (16) is rotatably installed on the first support frame (14), the first threaded rod (16) is threadedly connected to the first connecting block (13), the first connecting block (13) is vertically limited and slidably connected to the first support frame (14), the front and rear ends of the first pressure roller (15) are fixedly connected to the first connecting block (13) respectively; the first pressure roller (15) is located on the right side of the first material box (12).

3. The molding equipment according to claim 2, characterized in that, The second conveying assembly (2) includes a second chain plate conveyor (21), a second hopper (22), a second threaded rod (23), a second connecting block (24), a second guide rail assembly (25), a second pressure roller (26), and a second support frame (27). The frame of the second chain plate conveyor (21) is fixedly installed on the frame of the first chain plate conveyor (11). The frame of the second chain plate conveyor (21) is fixedly connected to the upper high-density polyethylene film, which is used to hold the modified resin paste and has a gap with the upper high-density polyethylene film so that the modified resin paste is evenly scraped onto the second chain plate conveyor (21). The second material box (22) on the film is located below the discharge port of another discharge pipe (35); the front and rear ends of the frame of the second chain plate conveyor (21) are fixedly connected to the second support frame (27), the second threaded rod (23) is rotatably installed on the second support frame (27), the second threaded rod (23) is threadedly connected to the second connecting block (24), the second connecting block (24) is vertically limited and slidably connected to the second support frame (27), the front and rear ends of the second pressure roller (26) are fixedly connected to the second connecting block (24) respectively; the second pressure roller (26) is located on the left side of the second material box (22).

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