High-precision transmission mechanism of an extrusion blow molding machine

Abstract

The utility model relates to the field of blow molding machine especially extrusion blow molding machine's high accuracy transmission mechanism, including frame, mounting panel, linear motor no.

Description

Technical Field

[0001] This utility model relates to the field of blow molding machines, and in particular to a high-precision transmission mechanism for an extrusion blow molding machine. Background Technology

[0002] A blow molding machine is a mechanical device used to produce hollow plastic products, mainly for manufacturing hollow plastic containers such as bottles, cans, barrels, and boxes. Its working principle involves extruding heated and molten plastic material into a tubular preform (called a "form"). The preform is then placed into a mold, and compressed air is blown in to expand it and conform it to the inner wall of the mold. After cooling, the desired hollow product is formed.

[0003] A search revealed patent publication number CN220548674U, which discloses a dual blow molding mechanism for an automatic extrusion blow molding machine, belonging to the field of blow molding machine technology. This mechanism includes an extrusion mechanism, a blow molding component, and a forming mold. The forming mold has symmetrically fixed mounting seats on its outer wall away from the extrusion mechanism, and these mounting seats are L-shaped. Material-receiving plates are fixedly connected to the top and bottom edges of the symmetrically arranged mounting seats, with a clearance fit at the joint. Guide pillars are symmetrically welded to the outer surface of the material-receiving plates, and springs are sleeved on the guide pillars. A movable seat is located on the side of the spring near the material-receiving plate, and the movable seat is inserted into and connected to the guide pillar. The movable seats are L-shaped, and rotating wheels are rotatably connected between the L-shaped movable seats. Driven by a servo motor, the two rotating wheels can rotate in opposite directions to pull off the molded material adhering to the material-receiving plate, eliminating the need for manual operation and providing great convenience.

[0004] While existing technologies can achieve certain material cutting effects in blow molding machines, they suffer from the drawback of low precision in the cutting and conveying mechanisms, resulting in poor material cutting and affecting subsequent processing. To address this, we propose a high-precision transmission mechanism for extrusion blow molding machines, which solves the aforementioned problem. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a high-precision transmission mechanism for an extrusion blow molding machine.

[0006] The technical solution of this utility model: A high-precision transmission mechanism for an extrusion blow molding machine includes a frame, a mounting plate, a linear motor 1, a linear motor 2, and a linear motor 3. Guide rails are fixed on both sides of the upper end of the frame, and a top plate is fixed on the upper end of the guide rails. The mounting plate is inserted into the upper half of the guide rails, and a movable frame is inserted into the lower end of the guide rails at the mounting plate. A linear motor 1 is fixed on the upper end of the top plate, and a connecting plate is provided at the lower end of the linear motors. A linear motor 2 is fixed on one side of the upper end of the connecting plate. An upper cutter and a lower cutter are respectively provided on the lower outer wall of the movable frame and the frame. Linear motors 3 are symmetrically provided on both sides of the upper end of the upper cutter and the lower cutter.

[0007] This device achieves high-precision cutting of blow-molded materials using a driven cutter. The first design feature lies in the precision difference between linear motor one and linear motor two. Linear motor one drives the upper cutter to move significantly, while linear motor two drives it to move slightly once it reaches the cutting range. This allows for flexible control of the cutting process. The second design feature is to prevent wear or rotational misalignment of the upper and lower cutters during operation, which could affect the cutting results. Therefore, a balancing device is used to calibrate the angles of the upper and lower cutters using linear motor three, ensuring a longer-lasting parallel relationship. Overall, this device achieves high-precision transmission and cutter control for cutting blow-molded materials, demonstrating high practicality.

[0008] Preferably, the upper and lower cutters are rotatably mounted on the movable frame and the outer wall of the machine frame, respectively, with their rotation centers located at the midpoint. This design makes the cutters more balanced during rotation and easier to adjust.

[0009] Preferably, the upper and lower cutters have symmetrical grooves on one side of their outer walls, and a movable block is inserted into the groove. A rotating frame is rotatably mounted on the upper end of the movable block. The grooves and movable blocks on the upper and lower cutters allow the cutters to be quickly replaced or adjusted when needed, preventing motion interference.

[0010] Preferably, the outer wall of the frame and the moving frame is fixed with a mounting base, the linear motor is fixed to the upper end, the output end of the linear motor is rotatably connected to the upper end of the rotating frame, and the pitch of the output end is ten micrometers.

[0011] Preferably, the surfaces of the upper and lower cutters are equipped with balancers. The balancers further enhance the stability of the upper and lower cutters, and can coordinate the three drives of the linear motors to maintain the relative parallelism of the cutters even after long-term operation.

[0012] Preferably, a limiting rod is fixed at the upper end of the mounting plate, and the limiting rod is inserted through the top plate; a second limiting rod is fixed at the upper end of the movable frame, and the second limiting rod is inserted through the mounting plate.

[0013] Preferably, the output end one of the linear motor one is rotatably connected to the upper end of the connecting plate, and the output end two of the linear motor two is rotatably connected to the upper end of the extension column on the upper end of the mounting plate. The thread pitches of the output end one and the output end two are 10 mm and 5 mm, respectively.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] I. This utility model achieves high-precision and high-efficiency cutting of blow-molded materials through precise mechanical design. The graded control of linear motor one and linear motor two ensures the stability and accuracy of the cutting process and optimizes the cutting effect of blow-molded materials.

[0016] Second, based on the first beneficial effect, the real-time calibration of the balancer, combined with the high-precision drive of the linear motor three to prevent the cutter from deviating, not only improves production efficiency but also extends the service life of the equipment, which has significant practical and economic value.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0019] Figure 2 This is a front view schematic diagram of the present invention;

[0020] Figure 3 This is a side view of the present invention;

[0021] Figure 4 For the present utility model Figure 1 Enlarged schematic diagram of structure A in the middle.

[0022] Figure label:

[0023] 1. Frame; 2. Guide rail; 3. Upper cutter; 4. Connecting plate; 5. Linear motor II; 6. Linear motor I; 7. Top plate; 8. Limiting rod I; 9. Mounting plate; 10. Limiting rod II; 11. Moving frame; 12. Lower cutter; 13. Balancer; 14. Linear motor III; 15. Mounting base; 16. Groove; 17. Moving block; 18. Rotating frame; 19. Output end II; 20. Output end I; 21. Output end III. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0028] Example 1

[0029] Please see Figures 1-4 As shown, this embodiment is a high-precision transmission mechanism for an extrusion blow molding machine, including a frame 1, a mounting plate 9, a linear motor 6, a linear motor 5, and a linear motor 14. Guide rails 2 are fixed on both sides of the upper end of the frame 1, and a top plate 7 is fixed on the upper end of the guide rails 2. The mounting plate 9 is inserted into the upper half of the guide rails 2. A movable frame 11 is inserted into the lower end of the guide rails 2 located on the mounting plate 9. A linear motor 6 is fixed on the upper end of the top plate 7. A connecting plate 4 is provided at the lower end of the linear motor 6. A linear motor 5 is fixed on one side of the upper end of the connecting plate 4. An upper cutter 3 and a lower cutter 12 are respectively provided on the lower outer wall of the movable frame 11 and the frame 1. Linear motors 14 are symmetrically provided on both sides of the upper end of the upper cutter 3 and the lower cutter 12.

[0030] This device achieves high-precision cutting of blow-molded materials using a driven cutter. The first design feature lies in the precision difference between linear motor 6 and linear motor 5. Linear motor 6 drives the upper cutter 3 with large-amplitude movements, while linear motor 5 switches to drive it with smaller movements once it reaches the cutting range. This allows for flexible control of the cutting process. The second design feature is to prevent collisions. During operation, wear or rotational misalignment between the upper cutter 3 and the lower cutter 12 can cause them to become non-parallel, affecting the cutting effect. Therefore, a balancing device 13 senses the lower linear motor 14 to calibrate the angles of the upper cutter 3 and the lower cutter 12, ensuring a longer-lasting parallel relationship. Overall, this device achieves high-precision transmission and cutter control for cutting blow-molded materials, demonstrating high practicality.

[0031] Example 2

[0032] Please see Figures 1-4As shown, this embodiment, based on embodiment 1, further includes: the upper cutter 3 and the lower cutter 12 are rotatably mounted on the outer wall of the movable frame 11 and the machine frame 1, respectively, with their rotation centers located at the midpoint. The midpoint location of the rotation centers of the upper cutter 3 and the lower cutter 12 makes the cutters more balanced during rotation, facilitates adjustment, and reduces vibration and wear caused by center of gravity shift, thereby improving cutting accuracy and cutter lifespan.

[0033] The upper cutter 3 and the lower cutter 12 have symmetrically arranged grooves 16 on one side of their outer walls. A movable block 17 is inserted into the groove 16, and a rotating frame 18 is rotatably mounted on the upper end of the movable block 17. The grooves 16 and movable blocks 17 on the upper cutter 3 and the lower cutter 12 allow the cutters to be quickly replaced or adjusted when needed, preventing motion interference and improving the flexibility and maintenance efficiency of the equipment.

[0034] Mounting bases 15 are fixed to the outer walls of the frame 1 and the moving frame 11. Linear motor 3 14 is fixed to the upper end of the mounting base 15. The output end 3 21 of linear motor 3 14 is rotatably connected to the upper end of the rotating frame 18. The pitch of the output end 3 21 is ten micrometers. The precise installation of the mounting base 15 and linear motor 3 14, as well as the small pitch design of the output end 3 21, allows for more precise angle adjustment of the upper cutter 3 and the lower cutter 12, ensuring high precision and high efficiency in the cutting process.

[0035] The surfaces of the upper cutter 3 and the lower cutter 12 are equipped with a balancer 13. The balancer 13 further enhances the stability of the upper cutter 3 and the lower cutter 12. Even after long-term operation, it can coordinate the linear motor 3 14 to drive the cutters to maintain relative parallelism, thus avoiding the impact on cutting quality due to cutter deviation.

[0036] Limiting rod 8 is fixed to the upper end of mounting plate 9, and it is inserted through the top plate 7. Limiting rod 10 is fixed to the upper end of moving frame 11, and it is inserted through the mounting plate 9. The design of limiting rod 8 and limiting rod 10 effectively limits the movement range of mounting plate 9 and moving frame 11, increases the stability of movement, prevents equipment damage caused by excessive movement, and also ensures safety during the cutting process.

[0037] The output end 20 of linear motor 6 is rotatably connected to the upper end of connecting plate 4, and the output end 19 of linear motor 5 is rotatably connected to the upper end of the extension column of mounting plate 9. The thread pitches of output ends 20 and 19 are 10 mm and 5 mm, respectively. The difference in thread pitch between the output ends of linear motors 6 and 5 allows the equipment to switch freely between rapid movement and fine adjustment, improving work efficiency and cutting quality.

[0038] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A high-precision transmission mechanism for an extrusion blow molding machine, comprising a frame (1), a mounting plate (9), a linear motor one (6), a linear motor two (5), and a linear motor three (14), characterized in that: The upper sides of the frame (1) are fixed with guide rails (2), the upper end of the guide rails (2) is fixed with a top plate (7), the upper half of the guide rails (2) is inserted with a mounting plate (9), the guide rails (2) are inserted with a moving frame (11) at the lower end of the mounting plate (9), the upper end of the top plate (7) is fixed with a linear motor (6), the lower end of the linear motor (6) is provided with a connecting plate (4), the upper side of the connecting plate (4) is fixed with a linear motor (5), the lower outer wall of the moving frame (11) and the frame (1) is respectively provided with an upper cutter (3) and a lower cutter (12), and the upper sides of the upper cutter (3) and the lower cutter (12) are symmetrically provided with a linear motor (14).

2. The high-precision transmission mechanism of an extrusion blow molding machine according to claim 1, characterized in that: The upper cutter (3) and the lower cutter (12) are rotatably mounted on the outer wall of the movable frame (11) and the machine frame (1), respectively, and the rotation center is located at the midpoint.

3. The high-precision transmission mechanism of an extrusion blow molding machine according to claim 1, characterized in that: The upper cutter (3) and the lower cutter (12) have symmetrical grooves (16) on one side of their outer walls. A movable block (17) is inserted into the groove (16), and a rotating frame (18) is rotatably mounted on the upper end of the movable block (17).

4. The high-precision transmission mechanism of an extrusion blow molding machine according to claim 1, characterized in that: The outer walls of the frame (1) and the moving frame (11) are fixed with mounting bases (15), the linear motor (14) is fixed to the upper end of the mounting base (15), the output end (21) of the linear motor (14) is rotatably connected to the upper end of the rotating frame (18), and the pitch of the output end (21) is ten micrometers.

5. The high-precision transmission mechanism of an extrusion blow molding machine according to claim 3, characterized in that: The surfaces of the upper cutter (3) and the lower cutter (12) are provided with balancers (13).

6. The high-precision transmission mechanism of an extrusion blow molding machine according to claim 1, characterized in that: The upper end of the mounting plate (9) is fixed with a limiting rod one (8), which is inserted through the top plate (7). The upper end of the movable frame (11) is fixed with a limiting rod two (10), which is inserted through the mounting plate (9).

7. The high-precision transmission mechanism of an extrusion blow molding machine according to claim 1, characterized in that: The output end 1 (20) of the linear motor 1 (6) is rotatably connected to the upper end of the connecting plate (4), and the output end 2 (19) of the linear motor 2 (5) is rotatably connected to the upper end of the extension column of the mounting plate (9). The thread pitch of the output end 1 (20) and the output end 2 (19) is 10 mm and 5 mm, respectively.

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