A quantitative extrusion preforming machine for BMC masses

Abstract

The utility model relates to BMC group material processing equipment technical field discloses a kind of quantitative extrusion preforming machine of BMC group material, including discharging tank, the gear lever one is fixedly connected with driving motor driving end, the gear lever one front end is provided with conveying scraping wall subassembly, two gear lever two are rotatably connected in the inside rear side of discharging tank, the front end fixedly connected with connecting shaft of gear lever two, the outside of connecting shaft is provided with stirring scraping wall subassembly;The conveying scraping wall subassembly includes spiral conveying rod, the outside fixedly connected with multiple evenly distributed scraping blade two of spiral conveying rod;The stirring scraping wall subassembly includes multiple evenly distributed mixing rod, the outside fixedly connected with multiple evenly distributed scraping blade one of connecting shaft.The utility model in, by stirring scraping wall subassembly and conveying scraping wall subassembly, can scrape off the adhering material in the inside wall and conveying channel on tank in the process of stirring and conveying simultaneously, effectively reduce material residual quantity.

Description

Technical Field

[0001] This utility model relates to the technical field of BMC slub processing equipment, and in particular to a quantitative extrusion preforming machine for BMC slub. Background Technology

[0002] Bulk molding compound (BMC) is a bulk composite material made by mixing unsaturated polyester resin, glass fiber, fillers and additives. It has the characteristics of high molding efficiency, good dimensional stability and excellent mechanical properties, and is widely used in electrical insulation parts, automotive parts, rail transit accessories and other fields.

[0003] The production of BMC products typically involves two key steps: preforming and molding. Quantitative extrusion preforming is the core process to ensure the stable quality of subsequent molded products. Its function is to process loose BMC lumps into blanks with uniform weight and regular shape, providing standardized raw materials for molding.

[0004] However, in practical applications, during the mixing and conveying process of existing equipment, BMC agglomerates tend to adhere to the inner wall of the tank and the conveying channel due to their high viscosity. It is difficult to completely remove the residual material during cleaning, resulting in material waste, cross-contamination, and frequent shutdowns. In addition, the position of the cutting blade is relatively fixed. When it is necessary to adapt to molds of different lengths, the position of the cutting mechanism or the mold needs to be adjusted as a whole, which is cumbersome and has low adjustment accuracy, affecting the efficiency of production changeover. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a quantitative extrusion preforming machine for BMC lumps, which aims to improve the problems of waste and pollution caused by adhesion residue in the prior art, and the cumbersome adjustment and low precision when the cutting blade is fixed to adapt to different molds.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A quantitative extrusion preforming machine for BMC lumps includes a feeding box, with support frames fixedly connected to the left and right sides of the bottom of the feeding box. A drive motor is installed on the rear side of the feeding box, and a gear rod is fixedly connected to the drive end of the drive motor. A conveying and scraping component is provided at the front end of the gear rod. Two gear rods are rotatably connected to the rear side inside the feeding box. A connecting shaft is fixedly connected to the front end of the gear rods. A stirring and scraping component is provided on the outside of the connecting shaft. A mold tube is installed on the front side of the feeding box. The conveying and scraping assembly includes a spiral conveying rod, which is rotatably connected inside the discharge box, and multiple evenly distributed scrapers are fixedly connected to the outside of the spiral conveying rod. The stirring and scraping assembly includes multiple uniformly distributed mixing rods, which are fixedly connected to the outside of the connecting shaft. Multiple uniformly distributed scrapers are fixedly connected to the outside of the connecting shaft. As a further description of the above technical solution: Two support frames are internally slidably connected to each other on one side. Cylinders are installed on the top left and right sides of the limit support plate. A cutting blade is fixedly connected to the top side of the two cylinders. Threaded rods are threadedly connected to the top left and right sides of the limit support plate. An adjustment knob is fixedly connected to the top of the threaded rod. The bottom side of the adjustment knob abuts against the top side of the support frame. As a further description of the above technical solution: The support frame has a movable groove inside, and the limiting support plate is slidably connected in the movable groove; As a further description of the above technical solution: The limiting support plate has threaded grooves on both the left and right sides of the top, and the bottom end of the threaded rod is threaded into the threaded groove. As a further description of the above technical solution: The top of the feeding box is hinged with a box cover, and a heater is installed at the bottom of the feeding box; As a further description of the above technical solution: The front part of the feeding box is fixedly connected to the mounting block, and the rear end of the mold tube is installed in the mounting block; As a further description of the above technical solution: The bottom of the feeding box is provided with a feeding trough, the spiral conveying rod is rotatably connected in the feeding trough, and the scraper two abuts against the inside of the feeding trough. As a further description of the above technical solution: The scraper abuts against the inside of the discharge box, and the gear rod is meshed with the outside of the gear rod.

[0007] This utility model has the following beneficial effects: 1. In this utility model, the mixing and scraping components and the conveying and scraping components can simultaneously scrape off the adhering materials on the inner wall of the box and the conveying channel during the mixing and conveying process, effectively reducing the amount of material residue. This avoids material waste and cross-contamination between different batches of materials caused by residue, and eliminates the need for frequent machine shutdowns for manual cleaning.

[0008] 2. In this utility model, the limiting support plate slides back and forth in the moving slide groove. You only need to turn the adjustment knob by hand to rotate the threaded rod in the threaded groove, which pushes the limiting support plate to the required position. After adjustment, tighten the knob and the adjustment knob will press against the top side of the support frame to fix the position. The whole process does not require professional tools, which greatly improves the flexibility of the equipment. Attached Figure Description

[0009] Figure 1This is a three-dimensional schematic diagram of a quantitative extrusion preforming machine for BMC briquettes proposed in this utility model; Figure 2 This is a schematic diagram of the cover of a quantitative extrusion preforming machine for BMC lumps proposed in this utility model. Figure 3 This is a schematic diagram of the mounting block of a quantitative extrusion preforming machine for BMC lumps proposed in this utility model; Figure 4 This is a schematic diagram of the heater of a quantitative extrusion preforming machine for BMC lumps proposed in this utility model. Figure 5 This is a schematic diagram of the screw conveyor of a quantitative extrusion preforming machine for BMC lumps proposed in this utility model. Figure 6 This is a schematic diagram of the limiting support plate of a quantitative extrusion preforming machine for BMC lumps proposed in this utility model.

[0010] Legend: 1. Feeding box; 2. Box cover; 3. Support frame; 4. Heater; 5. Drive motor; 6. Gear rod one; 7. Gear rod two; 8. Connecting shaft; 9. Mixing rod; 10. Scraper one; 11. Screw conveyor rod; 12. Scraper two; 13. Mounting block; 14. Mold tube; 15. Feeding chute; 16. Moving slide; 17. Threaded groove; 18. Threaded rod; 19. Adjusting knob; 20. Limiting support plate; 21. Cylinder; 22. Cutting blade. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0012] Reference Figures 1-6This utility model provides an embodiment of a quantitative extrusion preforming machine for BMC lumps, comprising a feeding box 1, which provides a stable material storage space for subsequent mixing and conveying processes. A box cover 2 is hinged to the top of the feeding box 1, preventing material from splashing out during processing and blocking foreign objects from entering and contaminating the material. A heater 4 is installed at the bottom of the feeding box 1, which raises the internal temperature of the feeding box 1 through heat transfer, heating the BMC lumps to a suitable plasticizing temperature. Support frames 3 are fixedly connected to the left and right sides of the bottom of the feeding box 1, providing stable support for the entire quantitative extrusion preforming machine for BMC lumps on the ground. A drive motor 5 is installed at the rear of the feeding box 1, providing stable rotational power. A gear rod 6 is fixedly connected to the drive end of the drive motor 5. The gear rod 6 rotates synchronously with the drive motor 5. A conveying and scraping component is provided at the front end of the gear rod 6. Two gear rods 7 are rotatably connected to the rear side of the inside of the discharge box 1. The gear rod 6 is meshed with the outside of the gear rod 7. The rotational power of the gear rod 6 is smoothly transmitted to the two gear rods 7, so that the two gear rods 7 maintain synchronous speed. A connecting shaft 8 is fixedly connected to the front end of the gear rod 7. The connecting shaft 8 rotates synchronously with the gear rod 7, driving the stirring and scraping component to rotate. A stirring and scraping component is provided on the outside of the connecting shaft 8. A mold tube 14 is installed on the front side of the discharge box 1. Through the shape of the cavity inside the mold tube 14, the material is shaped into blanks of preset shapes such as cylinders and square bars. An installation block 13 is fixedly connected to the front of the discharge box 1. The rear end of the mold tube 14 is installed in the installation block 13. The main function of the installation block 13 is to fix the mold tube 14. The conveying and scraping assembly includes a spiral conveying rod 11, which is rotatably connected inside the feeding box 1. The spiral conveying rod 11 can continuously output propulsion force to smoothly convey BMC lumps. Multiple evenly distributed scraper blades 12 are fixedly connected to the outside of the spiral conveying rod 11. The scraper blades 12 can scrape off the BMC lumps adhering to the inside of the feeding trough 15 to prevent material residue from clogging the feeding trough 15. At the same time, they can also assist in pushing the material forward and improve the conveying efficiency. The feeding trough 15 is opened on the bottom side inside the feeding box 1. The spiral conveying rod 11 is rotatably connected inside the feeding trough 15, and the scraper blades 12 abut against the inside of the feeding trough 15. The feeding trough 15 is the conveying channel for BMC lumps. The mixing and scraping assembly includes multiple evenly distributed mixing rods 9, which are fixedly connected to the outside of the connecting shaft 8. When the mixing rods 9 rotate with the connecting shaft 8, they will insert into the BMC clumps in the discharge box 1. By mixing, the agglomeration of the material is broken, allowing the resin, glass fiber, filler and other components to be fully mixed. Multiple evenly distributed scrapers 10 are fixedly connected to the outside of the connecting shaft 8. The scrapers 10 abut against the inside of the discharge box 1. The scrapers 10 can scrape off the BMC clumps adhering to the inner wall of the discharge box 1 and re-participate in the mixing, which reduces material waste and avoids residual material contaminating the next batch of material. Reference Figure 2 and Figure 6 Two support frames 3 are internally connected to a limiting support plate 20 facing each other. The limiting support plate 20 slides back and forth inside the support frame 3, thereby adjusting the position of the cutting blade 22 on the limiting support plate 20 to adapt to mold tubes 14 of different lengths. The support frame 3 has a movable slide groove 16 inside, and the limiting support plate 20 is slidably connected in the movable slide groove 16. The movable slide groove 16 provides a sliding track for the limiting support plate 20, so that the limiting support plate 20 can only slide along the back and forth direction of the movable slide groove 16. Cylinders 21 are installed on the left and right sides of the top of the limiting support plate 20. The cutting blade 22 is fixedly connected to the two cylinders 21 facing each other. The cylinders 21 extend and retract synchronously. The cutting blade 22 moves smoothly, preventing it from tilting during the cutting process and ensuring that the cut blank has a flat cross-section and meets the required dimensions. The top left and right sides of the limiting support plate 20 are threaded with threaded rods 18, and the top left and right sides of the limiting support plate 20 are threaded with grooves 17. The bottom end of the threaded rod 18 is threaded into the groove 17, and the top end of the threaded rod 18 is fixedly connected to an adjustment knob 19. The bottom side of the adjustment knob 19 abuts against the top side of the support frame 3. The limiting support plate 20 can be moved or locked by rotating the threaded rod 18 inside the groove 17 and then by abutting the support frame 3 with the adjustment knob 19.

[0013] Working principle: First, open the lid 2 and pour the BMC lumps into the feeding box 1. After closing the lid 2, start the heater 4. The heater 4 will bake the lumps in the feeding box 1 to a consistency that allows for easy mixing. Then, turn on the drive motor 5, which will drive gear rod 6 to rotate synchronously. Gear rod 6 meshes with two gear rods 7, which rotate together. Gear rods 7 then drive the connecting shaft 8 at the front end to rotate. When the connecting shaft 8 rotates, the mixing rod 9 will insert into the lumps and stir, mixing the resin, glass fiber, and other components. The mixture is stirred evenly. At the same time, scraper 10 rotates along the inner wall of the feeding box 1 to scrape off the material stuck to the box wall and stir it again. The mixed material will fall into the feeding trough 15 at the bottom of the feeding box 1. The spiral conveying rod 11 at the front end of gear rod 16 rotates along with it. The spiral structure will push the material forward. Scraper 2 12 will scrape along the inner side of the feeding trough 15 to scrape off the material stuck to the trough wall and convey it forward together. The material is pushed into the mold tube 14 and squeezed into a continuous blank of a fixed shape along the cavity of the mold tube 14.

[0014] When cutting blanks of different lengths, turn the adjusting knob 19 on the limiting support plate 20. The adjusting knob 19 drives the threaded rod 18 to rotate in the threaded groove 17, releasing the locking state of the limiting support plate 20. Then, adjust the limiting support plate 20 to a suitable position until the cutting blade 22 is aligned with the required cutting position. Then, tighten the adjusting knob 19 so that it presses against the top side of the support frame 3, fixing the limiting support plate 20 in place. When the mold tube 14 extrudes continuous blanks, start the cylinder 21. The two cylinders 21 will move up or down synchronously, cutting the blanks with the cutting blade 22.

[0015] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quantitative extrusion preforming machine for BMC lumps, comprising a feeding box (1), characterized in that: The bottom left and right sides of the feeding box (1) are fixedly connected to support frames (3). The rear side of the feeding box (1) is equipped with a drive motor (5). The drive end of the drive motor (5) is fixedly connected to a gear rod (6). The front end of the gear rod (6) is provided with a conveying scraping component. The rear side of the inside of the feeding box (1) is rotatably connected to two gear rods (7). The front end of the gear rods (7) is fixedly connected to a connecting shaft (8). The outside of the connecting shaft (8) is provided with a stirring scraping component. The front side of the feeding box (1) is equipped with a mold tube (14). The conveying and scraping assembly includes a spiral conveying rod (11), which is rotatably connected inside the discharge box (1), and a plurality of uniformly distributed scraper blades (12) are fixedly connected to the outside of the spiral conveying rod (11). The stirring and scraping assembly includes multiple uniformly distributed mixing rods (9), which are fixedly connected to the outside of the connecting shaft (8), and multiple uniformly distributed scrapers (10) are fixedly connected to the outside of the connecting shaft (8).

2. The quantitative extrusion preforming machine for BMC sludge according to claim 1, characterized in that: Two support frames (3) are internally slidably connected to a limiting support plate (20) on opposite sides. Cylinders (21) are installed on the top left and right sides of the limiting support plate (20). A cutting blade (22) is fixedly connected to the two cylinders (21) on opposite sides. Threaded rods (18) are threadedly connected to the top left and right sides of the limiting support plate (20). An adjustment knob (19) is fixedly connected to the top of the threaded rod (18). The bottom side of the adjustment knob (19) abuts against the top side of the support frame (3).

3. The quantitative extrusion preforming machine for BMC sludge according to claim 2, characterized in that: The support frame (3) has a movable slide groove (16) inside, and the limiting support plate (20) is slidably connected in the movable slide groove (16).

4. The quantitative extrusion preforming machine for BMC sludge according to claim 2, characterized in that: The limiting support plate (20) has threaded grooves (17) on both the left and right sides of the top, and the bottom end of the threaded rod (18) is threaded into the threaded groove (17).

5. A quantitative extrusion preforming machine for BMC slurry according to claim 1, characterized in that: The top of the feeding box (1) is hinged with a box cover (2), and a heater (4) is installed at the bottom of the feeding box (1).

6. The quantitative extrusion preforming machine for BMC sludge according to claim 1, characterized in that: The front of the feeding box (1) is fixedly connected to the mounting block (13), and the rear end of the mold tube (14) is installed in the mounting block (13).

7. A quantitative extrusion preforming machine for BMC slurry according to claim 1, characterized in that: The feeding box (1) has a feeding trough (15) on the bottom side inside. The spiral conveying rod (11) is rotatably connected in the feeding trough (15), and the scraper (12) abuts against the inside of the feeding trough (15).

8. A quantitative extrusion preforming machine for BMC slurry according to claim 1, characterized in that: The scraper (10) abuts against the inside of the feed box (1), and the gear rod (6) is engaged with the outside of the gear rod (7).

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