Electric crank link blow mold closing mechanism

Abstract

This application discloses an electric crank-connecting rod blow molding clamping mechanism, including an opening and closing mold mechanism and a mold moving mechanism located below the opening and closing mold mechanism. The opening and closing mold mechanism includes an opening and closing mold base, a crank-connecting rod assembly, a mold closing motor, and a front back plate, a front template, a rear template, and a rear back plate mounted on the opening and closing mold base from front to back. The front template is fixed to the front back plate, and the front back plate and the rear back plate are relatively fixed. The crank-connecting rod assembly includes a first swing arm rotatably connected to the rear template, a second swing arm rotatably connected to the rear back plate, and a rotating arm rotatably connected to the first swing arm and the second swing arm. The mold closing motor drives the rotating arm to rotate. The mold moving mechanism includes a base frame, a mold moving slide rail mounted on the base frame, a mold moving slider cooperating with the mold moving slide rail, and a mold moving drive assembly that drives the opening and closing mold mechanism to move left and right. The mold moving slider is fixed to the bottom of the opening and closing mold base. The crank-connecting rod assembly of this application has a compact structure, low failure rate, low wear, reduced energy loss, and structural rigidity far exceeding that of a hydraulic system.

Description

Technical Field

[0001] This application relates to the field of blow molding production technology, and in particular to an electric crank connecting rod blow molding mold closing mechanism. Background Technology

[0002] Blow molding machine mold closing technology is mainly based on traditional hydraulic drive and mechanical mold closing mechanisms. It usually uses hydraulic cylinders to drive tie rods for mold closing, relying on the clamping force provided by the hydraulic system. However, this structure has problems such as high energy consumption, high noise, and slow response speed. On the other hand, the mechanical crank-connecting rod mechanism has a simple structure, fast response speed, and higher power efficiency, but this structure is prone to wear, uneven mold closing, and affects product quality. Summary of the Invention

[0003] In order to solve the above-mentioned technical problems, the purpose of this application is to provide an electric crank connecting rod blow molding clamping mechanism.

[0004] To achieve the above objectives, this application adopts the following technical solution: an electric crank-connecting rod blow molding clamping mechanism, comprising: A mold opening and closing mechanism includes a mold opening and closing base, a front back plate, a front template, a rear template, a rear back plate, a crank-connecting rod assembly, and a mold closing motor. The front back plate, front template, rear template, and rear back plate are mounted on the mold opening and closing base from front to rear. The front template is fixed relative to the front back plate, and the rear template is drivenly connected to the rear back plate via the crank-connecting rod assembly. The front back plate and the rear back plate are fixedly connected relative to each other. The crank-connecting rod assembly includes a first swing arm rotatably connected to the rear template, a second swing arm rotatably connected to the rear back plate, and a rotating arm rotatably connected between the first and second swing arms. The mold closing motor drives the rotating arm to rotate to adjust the distance between the front template and the rear template. The mold-moving mechanism is located below the mold-opening and closing mechanism. The mold-moving mechanism includes a base frame, a mold-moving slide rail mounted on the base frame, a plurality of mold-moving sliders that slide in cooperation with the mold-moving slide rail, and a mold-moving drive assembly that is drively connected between the base frame and the mold-opening and closing base. The mold-moving slide rail extends in the left-right direction, and the plurality of mold-moving sliders are fixedly mounted on the bottom of the mold-opening and closing base. The mold-moving drive assembly is used to drive the mold-opening and closing mechanism to move back and forth along the mold-moving slide rail.

[0005] In the above technical solution, a further preferred embodiment is that the opening and closing mold base is equipped with a pair of left and right opposing guide components. Each guide component includes a plurality of guide seats arranged at intervals along the front-back direction and a guide shaft passing through the plurality of guide seats along the front-back direction. The plurality of guide seats support the corresponding guide shaft on the top of the opening and closing mold base. Each guide seat is provided with a guide hole for the corresponding guide shaft to pass through.

[0006] In the above technical solution, it is further preferred that the front back plate is fixedly installed at the front end of the two guide shafts, the rear back plate is fixedly installed at the rear end of the two guide shafts, the front template and the rear template are respectively provided with through holes for the guide shafts to pass through, and the front template and the rear template are configured to be able to move back and forth along the guide shafts.

[0007] In the above technical solution, a further preferred embodiment is that the mold opening and closing mechanism includes a motor base mounted on the two guide shafts, and the mold closing motor is mounted on the motor base.

[0008] In the above technical solution, a further preferred embodiment includes a first rotating shaft, a second rotating shaft, a third rotating shaft, and a fourth rotating shaft that are parallel to each other. One end of the first swing arm is rotatably connected to the rear template via the first rotating shaft. The other end of the first swing arm is rotatably connected to one end of the rotating arm via the second rotating shaft. One end of the second swing arm is rotatably connected to the back plate via the third rotating shaft. The other end of the second swing arm is rotatably connected to the other end of the rotating arm via the fourth rotating shaft. The drive shaft of the mold closing motor passes through the motor base, and the axis of the drive shaft coincides with the axis of the rotating arm.

[0009] In the above technical solution, a further preferred embodiment is that the mold closing motor is equipped with a mold closing reducer, and the mold closing reducer is mounted on the motor base.

[0010] In the above technical solution, a further preferred embodiment is that the mold-moving motor is equipped with a mold-moving reducer, and the mold-moving reducer is installed on the mold-opening and closing base.

[0011] In the above technical solution, a further preferred embodiment is that the mold moving drive assembly includes a rack mounted on the base frame, a gear meshing with the rack, and a mold moving motor connected to the gear transmission. The rack is parallel to the mold moving slide rail, and the mold moving motor is fixedly mounted on the opening and closing mold base and is used to drive the gear to rotate. The axis of the gear extends in the vertical direction.

[0012] Compared with the prior art, this application achieves the following beneficial effects: This application features a compact structure, low failure rate, and stable and uniform mold opening and closing. While ensuring the dimensional accuracy of the product, it also offers higher repeatability and positioning accuracy, making it suitable for precision molding. The crank-connecting rod assembly experiences less wear, resulting in lower maintenance costs and higher power efficiency. By converting the rotational motion of the motor into linear motion through mechanical transmission, it reduces energy loss and energy consumption. Furthermore, its structural rigidity is far superior to that of a hydraulic system. Attached Figure Description

[0013] Figure 1 A three-dimensional structural schematic diagram of an electric crank connecting rod blow molding clamping mechanism provided for an embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the electric crank connecting rod blow molding mold closing mechanism during mold closing; Figure 3 for Figure 1 A schematic diagram of the electric crank connecting rod blow molding mold closing mechanism during mold opening.

[0014] 100. Electric crank connecting rod blow molding mold closing mechanism; 10. Mold opening and closing mechanism; 1. Mold opening and closing base; 2. Front back plate; 3. Front template; 4. Rear template; 5. Rear back plate; 6. Crank connecting rod assembly; 61. First swing arm; 62. Second swing arm; 63. Rotating arm; 64. First rotating shaft; 65. Second rotating shaft; 66. Third rotating shaft; 67. Fourth rotating shaft; 7. Mold closing motor; 71. Drive shaft; 72. Mold closing reducer; 8. Guide assembly; 81. Guide seat; 82. Guide shaft; 9. Motor base; 20. Mold moving mechanism; 11. Base frame; 12. Mold moving slide rail; 13. Mold moving slider; 14. Mold moving drive assembly; 141. Rack; 142. Gear; 143. Mold moving motor; 144. Mold moving reducer. Detailed Implementation

[0015] To illustrate the technical content, structural features, achieved objectives, and effects of the application in detail, the technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. In the following description, for illustrative purposes, numerous specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in one or more equivalent arrangements. Furthermore, the various exemplary embodiments may differ, but are not necessarily exclusive. For example, the specific shape, structure, and characteristics of the exemplary embodiments may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0016] This application provides an electric crank-connecting rod blow molding clamping mechanism, such as... Figure 1 As shown, the electric crank connecting rod blow molding mold closing mechanism 100 is installed below the mold head to shape the blank extruded by the mold head. It includes a mold opening and closing mechanism 10 and a mold moving mechanism 20. The mold opening and closing mechanism 10 is installed on the mold moving mechanism 20 and moves back and forth in the left and right direction relative to the blow molding machine under the drive of the mold moving mechanism 20, so as to adjust the position of the mold opening and closing mechanism 10 on the blow molding machine.

[0017] like Figure 1 , 2 As shown, the mold opening and closing mechanism 10 includes a mold opening and closing base 1, a front back plate 2, a front template 3, a rear template 4, a rear back plate 5, a crank-connecting rod assembly 6, and a mold closing motor 7. The front back plate 2, the front template 3, the rear template 4, and the rear back plate 5 are mounted on the mold opening and closing base 1 from front to back. The front template 3 is fixedly connected to the front back plate 2, and the rear template 4 is drivenly connected to the rear back plate 5 through the crank-connecting rod assembly 6. The front back plate 2 and the rear back plate 5 are fixedly connected and can move synchronously in the front-to-back direction. The mold closing motor 7 is drivenly connected to the crank-connecting rod assembly 6. The mold closing motor 7 adjusts the distance between the front template 3 and the rear template 4 by driving the crank-connecting rod assembly 6, thereby realizing the opening and closing of the mold between the front template 3 and the rear template 4.

[0018] The crank-connecting rod assembly 6 includes a first swing arm 61 rotatably connected to the rear template 4, a second swing arm 62 rotatably connected to the rear back plate 5, and a rotating arm 63 rotatably connected between the first swing arm 61 and the second swing arm 62. The drive shaft 71 of the mold closing motor 7 passes through the rotating arm 63, and the axis of the drive shaft 71 coincides with the axis of the rotating arm 63, both extending in the left-right direction. The mold closing motor 7 can drive the rotating arm 63 to rotate around its own axis.

[0019] A pair of left-right opposing guide components 8 are installed on the opening and closing mold base 1. Each guide component 8 includes multiple guide seats 81 arranged at intervals in the front-back direction and guide shafts 82 passing through the multiple guide seats 81 in the front-back direction. The multiple guide seats 81 are fixedly installed on the top of the opening and closing mold base 1, and support the corresponding guide shafts 82 above the opening and closing mold base 1. Each guide seat 81 has a guide hole for the corresponding guide shaft 82 to pass through, and the guide shaft 82 can move relative to the multiple guide seats 81 in the front-back direction. The front back plate 2 is fixedly installed on the front end of the two guide shafts 82, and the rear back plate 5 is fixedly installed on the rear end of the two guide shafts 82. The front back plate 2 and the rear back plate 5 are fixedly connected relative to each other through the two guide shafts 82. The front template 3 and the rear template 4 are both provided with through holes for the guide shafts 82 to pass through. The front template 3 and the rear template 4 are both sleeved on the two guide shafts 82 through the through holes so that they can move smoothly back and forth along the two guide shafts 82.

[0020] A motor base 9 that can support the mold closing motor 7 is arranged between the rear template 4 and the back plate 5. The motor base 9 is sleeved on two guide shafts 82. The drive shaft 71 of the mold closing motor 7 passes through the motor base 9 in the left and right direction and supports the rotating arm 63 on the motor base 9 so that it can rotate around its own axis. The first swing arm 61 is located between the rear template 4 and the motor base 9, and the second swing arm 62 is located between the motor base 9 and the back plate 5.

[0021] Continue to refer to Figure 1 and Figure 2 The crank-connecting rod assembly 6 also includes a first rotating shaft 64, a second rotating shaft 65, a third rotating shaft 66, and a fourth rotating shaft 67 that are parallel to each other. One end of the first swing arm 61 is rotatably connected to the rear template 4 via the first rotating shaft 64, and the other end of the first swing arm 61 is rotatably connected to one end of the rotating arm 63 via the second rotating shaft 65. One end of the second swing arm 62 is rotatably connected to the rear back plate 5 via the third rotating shaft 66, and the other end of the second swing arm 62 is rotatably connected to the other end of the rotating arm 63 via the fourth rotating shaft 67. The various connecting rod components are connected by rotating shafts, which reduces wear and facilitates later maintenance and replacement.

[0022] like Figure 2 , 3 As shown, the rotating arm 63, driven by the mold-closing motor 7, has a horizontal position extending in the front-to-back direction and an inclined position with its two ends facing upward or downward respectively. When the mold-closing motor 7 drives the rotating arm 63 to rotate from the horizontal position to the inclined position, the first swing arm 61 swings around the first rotating shaft 64 at an angle α, and the rear template 4 moves closer to the motor base 9, that is, moves backward a distance L. At the same time, the second swing arm 62 swings around the third rotating shaft 66 at the same angle α, and the rear back plate 5 moves closer to the motor base 9, that is, moves forward a distance L. Since the front back plate 2 and the rear back plate 5 are relatively fixedly connected by two guide shafts 82, and the front back plate 2 and the front template 3 are relatively fixedly connected, the front template 3 moves forward a distance L, the rear template 4 moves backward a distance L, and the front template 3 moves forward a distance L. The two move synchronously and move away from each other at equal distances through the crank-connecting rod assembly 6, thus realizing the mold opening operation.

[0023] When the mold closing motor 7 drives the rotating arm 63 to rotate from an inclined position to a horizontal position, the first swing arm 61 and the second swing arm 62 simultaneously rotate to a position on the same horizontal plane as the rotating arm 63. The first swing arm 61 pushes the rear template 4 away from the motor base 9, that is, moves it forward a certain distance. At the same time, the second swing arm 62 pushes the rear back plate 5 away from the motor base 9, that is, the rear back plate 5 moves backward the same distance. The front back plate 2, which is fixed relative to the rear back plate 5, drives the front template 3 to move backward a certain distance. The rear template 4 moves forward and the front template 3 moves backward. The two move synchronously and are equidistant from each other through the crank connecting rod assembly 6, realizing the mold closing operation, effectively improving the mold closing accuracy, and making the mold closing uniform and stable.

[0024] The mold closing motor 7 drives the front mold plate 3 and the rear mold plate 4 to move synchronously through the crank connecting rod assembly 6, realizing stable and uniform mold opening and closing operations. It has a compact structure and low failure rate. While ensuring the dimensional accuracy of the product, it has higher repeatability and positioning accuracy, making it suitable for precision molding. In addition, the crank connecting rod assembly 6 has less wear, lower maintenance costs, and higher power efficiency. It directly converts the rotational motion of the mold closing motor 7 into linear motion through mechanical transmission, reducing energy loss and energy consumption. Its structural rigidity is much higher than that of the hydraulic system.

[0025] The mold clamping motor 7 is equipped with a mold clamping reducer 72, which is mounted on the motor base 9. The mold clamping reducer 72 can reduce the speed, increase the torque, improve the mold clamping force, and thus improve the quality of the product.

[0026] The mold-moving mechanism 20 is located below the mold-opening and closing mechanism 10. The mold-moving mechanism 20 includes a base frame 11, a mold-moving slide rail 12 mounted on the base frame 11, a plurality of mold-moving sliders 13 that slide in cooperation with the mold-moving slide rail 12, and a mold-moving drive assembly 14 that is drively connected between the base frame 11 and the mold-opening and closing base 1. The mold-moving slide rail 12 extends in the left-right direction, and the plurality of mold-moving sliders 13 are fixedly mounted on the bottom of the mold-opening and closing base 1. The mold-opening and closing base 1 can move smoothly in the left-right direction on the base frame 11 through the mutually cooperating mold-moving sliders 13 and the mold-moving slide rail 12. The mold-moving drive assembly 14 is used to drive the mold-opening and closing mechanism 10 to move back and forth along the mold-moving slide rail 12.

[0027] like Figure 1 , 2 As shown, the mold transfer drive assembly 14 includes a rack 141 mounted on the base frame 11, a gear 142 meshing with the rack 141, and a mold transfer motor 143 connected to the gear 142. The rack 141 is parallel to the mold transfer slide rail 12. The mold transfer motor 143 is fixedly mounted on the mold opening and closing base 1 and is used to drive the gear 142 to rotate. The axis of the gear 142 extends in the vertical direction. When the gear 142 rotates under the drive of the mold transfer motor 143, the meshing gear 142 interacts with the rack 141, thereby driving the mold opening and closing base 1 to move in the left and right direction relative to the base frame 11. The mold transfer motor 143 is equipped with a mold transfer reducer 144, which is mounted on the mold opening and closing base 1. The mold transfer mechanism 20 can precisely adjust the position of the mold closing center of the mold opening and closing mechanism 10 so that it can be aligned with the upper mold head.

[0028] The workflow of this application is as follows: First, the mold moving motor 143 drives the mold opening and closing mechanism 10 to move to a suitable position on the blow molding machine, so that the mold closing center is aligned with the mold head center. Then, the mold closing motor 7 starts to work, and the rotating arm 63 rotates from the horizontal position to the inclined position, so that the front mold plate 3 and the rear mold plate 4 move away from each other to realize the mold opening action, and the blank enters the mold between the front mold plate 3 and the rear mold plate 4 from the mold head. The mold closing motor 7 reverses, so that the rotating arm 63 rotates from the inclined position back to the horizontal position, and the front mold plate 3 and the rear mold plate 4 move closer to each other to realize the mold closing action.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this application. Various changes and modifications can be made without departing from the spirit and scope of this application. The scope of protection claimed by this application is defined by the appended claims, specification, and their equivalents.

Claims

1. An electric crank-connecting rod blow molding clamping mechanism, characterized in that, include: The mold opening and closing mechanism includes an opening and closing mold base, a front back plate, a front template, a rear template, a rear back plate, a crank-connecting rod assembly, and a mold closing motor. The front back plate, the front template, the rear template, and the rear back plate are mounted on the opening and closing mold base from front to rear. The front template is fixed relative to the front back plate, and the rear template is driven to the rear back plate via the crank-connecting rod assembly. The front back plate and the rear back plate are fixedly connected relative to each other. The crank-connecting rod assembly includes a first swing arm rotatably connected to the rear template, a second swing arm rotatably connected to the rear back plate, and a rotating arm rotatably connected between the first swing arm and the second swing arm. The mold closing motor is used to drive the rotating arm to rotate to adjust the distance between the front template and the rear template. as well as The mold-moving mechanism is located below the mold-opening and closing mechanism. The mold-moving mechanism includes a base frame, a mold-moving slide rail mounted on the base frame, a plurality of mold-moving sliders that slide in cooperation with the mold-moving slide rail, and a mold-moving drive assembly that is drively connected between the base frame and the mold-opening and closing base. The mold-moving slide rail extends in the left-right direction, and the plurality of mold-moving sliders are fixedly mounted on the bottom of the mold-opening and closing base. The mold-moving drive assembly is used to drive the mold-opening and closing mechanism to move back and forth along the mold-moving slide rail.

2. The electric crank connecting rod blow molding clamping mechanism according to claim 1, characterized in that, The opening and closing mold base is equipped with a pair of left and right opposing guide components. Each guide component includes multiple guide seats arranged at intervals along the front-back direction and a guide shaft passing through the multiple guide seats along the front-back direction. The multiple guide seats support the corresponding guide shaft on the top of the opening and closing mold base. Each guide seat has a guide hole for the corresponding guide shaft to pass through.

3. The electric crank connecting rod blow molding clamping mechanism according to claim 2, characterized in that, The front back plate is fixedly installed at the front end of the two guide shafts, and the rear back plate is fixedly installed at the rear end of the two guide shafts. The front template and the rear template are respectively provided with through holes for the guide shafts to pass through. The front template and the rear template are configured to move back and forth along the guide shafts.

4. The electric crank connecting rod blow molding clamping mechanism according to claim 2, characterized in that, The mold opening and closing mechanism includes a motor mount mounted on two of the guide shafts, and the mold closing motor is mounted on the motor mount.

5. The electric crank connecting rod blow molding clamping mechanism according to claim 4, characterized in that, The mold opening and closing mechanism further includes a first rotating shaft, a second rotating shaft, a third rotating shaft, and a fourth rotating shaft that are parallel to each other. One end of the first swing arm is rotatably connected to the rear template through the first rotating shaft. The other end of the first swing arm is rotatably connected to one end of the rotating arm through the second rotating shaft. One end of the second swing arm is rotatably connected to the back plate through the third rotating shaft. The other end of the second swing arm is rotatably connected to the other end of the rotating arm through the fourth rotating shaft. The drive shaft of the mold closing motor passes through the motor base, and the axis of the drive shaft coincides with the axis of the rotating arm.

6. The electric crank connecting rod blow molding clamping mechanism according to claim 5, characterized in that, The mold-closing motor is equipped with a mold-closing reducer, which is mounted on the motor base.

7. The electric crank connecting rod blow molding clamping mechanism according to claim 1, characterized in that, The mold moving drive assembly includes a rack mounted on the base frame, a gear meshing with the rack, and a mold moving motor connected to the gear transmission. The rack is parallel to the mold moving slide rail. The mold moving motor is fixedly mounted on the opening and closing mold base and is used to drive the gear to rotate. The axis of the gear extends in the vertical direction.

8. The electric crank connecting rod blow molding clamping mechanism according to claim 7, characterized in that, The mold-moving motor is equipped with a mold-moving reducer, which is mounted on the mold-opening / closing base.

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