Servo stretch blow molding mechanism

Abstract

This utility model provides a servo stretch blow molding mechanism, relating to the field of molding technology. It includes a rotating disk with a fixed disk at its bottom. Vertical plates are fixedly connected at equal intervals to the top of the rotating disk near its edge. Four grooves are equally spaced on the top of the rotating disk, and movable plates are located on the top of the rotating disk above each groove. Bottle mold slots are formed inside the vertical plates and movable plates, and bottle grooves are formed on the top of the vertical plates and movable plates near their centers. A rotating assembly is mounted on the fixed disk. This utility model achieves rapid mold switching by installing multiple molding molds on the edge of the rotating disk and changing the molds using the rotating disk. Compared to traditional manual mold changing methods, it significantly reduces mold change time, for example, from tens of minutes to a few minutes or even less, effectively improving equipment utilization and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of molding technology, and in particular to a servo stretch blow molding mechanism. Background Technology

[0002] Plastic hollow containers such as cola bottles and mineral water bottles are manufactured by injection molding preforms. The entire process of the blow molding machine is as follows: first, the preform is transferred to the preform mounting end of the preform holder; then, the preform is heated or preheated; then, it is stretched and blown; finally, the formed bottle is removed from the blow molding machine. Among these processes, stretching and blowing are precisely matched. Compared to stretching, if the high-pressure gas enters the preform too late or too early, it will affect the product quality.

[0003] Existing patents, such as Chinese Patent Publication No. CN218701174U, disclose a dual-servo, dual-stretch blow molding mechanism, including a base plate, a stretch blow molding assembly, and a mold assembly. The base plate has guide posts evenly distributed along its upper edge, with the upper ends of the guide posts fixedly connected to the lower end of a top plate. The stretch blow molding assembly includes a lead screw, a support plate, a stretch rod, air holes, a connecting sleeve, and an air pipe. The lead screw is rotatably connected to the lower center of the top plate via a bearing. The support plate is slidably connected between the four guide posts. A threaded hole inside the support plate is threaded to the lead screw. A stretch rod is installed in a circular hole inside the support plate, and air holes are evenly distributed on the lower side of the outer arc surface of the stretch rod. This dual-servo, dual-stretch blow molding mechanism uses a servo motor to drive the opening and closing of the stretch blow molding assembly and the mold, resulting in stable operation of the stretch blow molding process, stable quality of the produced plastic bottles, high production efficiency, and a wide range of applications.

[0004] While the aforementioned patented technology utilizes a servo motor to drive the opening and closing of the stretch blow molding assembly and mold, ensuring stable operation of the stretch blow molding process, consistent quality of the produced plastic bottles, high production efficiency, and wide application range, the mold replacement process is quite cumbersome. Typically, the mold is fixedly installed on the equipment. When producing bottles of different specifications or shapes, the original mold must be manually disassembled and a new mold installed. This process is not only time-consuming and labor-intensive but also requires a high level of technical skill from the operators. Utility Model Content

[0005] The purpose of this invention is to solve the problem of cumbersome mold replacement in the production process of blow molding mechanisms in the existing technology, and to propose a servo stretch blow molding mechanism.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a servo stretch blow molding mechanism, comprising a rotating disk, a fixed disk at the bottom of the rotating disk, vertical plates fixedly connected at equal intervals at the top of the rotating disk near its edge, four grooves equally spaced at the top of the rotating disk, and a movable plate at the top of the rotating disk above each groove; bottle mold grooves are formed inside the vertical plates and movable plates, and bottle slots are formed at the top of the vertical plates and movable plates near their centers; a rotating assembly mounted on the fixed disk; and a driving assembly mounted inside the grooves.

[0007] Preferably, the bottom of the fixed plate is fixedly connected with support legs at equal intervals near the edge.

[0008] Preferably, the rotating assembly includes a circular groove formed on the top of the fixed disk. A gear ring is embedded in and rotatably connected to the inside of the circular groove. The top of the gear ring is fixedly connected to the bottom of the rotating disk. A gear is meshed with the internal teeth of the gear ring. A first drive motor is fixedly connected to the bottom of the fixed disk. The output end of the first drive motor passes through the fixed disk and is fixedly connected to the bottom of the gear.

[0009] Preferably, the drive assembly includes four movable blocks, each of which is embedded in and slidably connected to a groove. Each movable block has a screw threaded through and connected to a threaded rod. One end of each screw is rotatably connected to a bearing on the inner wall of one end of the groove, and the other end of each screw passes through the inner wall of the other end of the groove and is rotatably connected to a bearing thereon. A square groove is formed at the bottom of the rotating disk near the center. A second drive motor is fixedly connected to the inner wall of each square groove, and the output end of each second drive motor is fixedly connected to one end of a screw.

[0010] Preferably, the top of the rotating disk and both sides of the groove are provided with limiting grooves, and limiting blocks are embedded and slidably connected inside the limiting grooves. The top of the limiting block is fixedly connected to the bottom of the moving plate, and a limiting rod is slidably connected through the center of the limiting block. Both ends of the limiting rod are fixedly connected to the inner walls of the two ends of the limiting groove.

[0011] Preferably, the bottle mold grooves inside the vertical plate and the movable plate are different.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, by installing multiple molds on the edge of a rotating disk and changing the molds by rotating the disk, rapid mold switching can be achieved. Compared with the traditional manual mold changing method, the mold changing time can be significantly shortened, for example from tens of minutes to a few minutes or even less, effectively improving equipment utilization and production efficiency.

[0014] 2. In this utility model, the mold replacement process of the device is relatively simple and does not require operators to have extremely high professional skills. Mold replacement can be achieved through simple operation via the control panel, reducing the technical requirements for operators and minimizing mold installation problems caused by improper human operation, thus ensuring the molding quality of the bottles. Attached Figure Description

[0015] Figure 1 This utility model provides a three-dimensional view of the overall structure of a servo stretch blow molding mechanism;

[0016] Figure 2 This utility model provides a vertical sectional view of the overall structure of a servo stretch blow molding mechanism.

[0017] Figure 3 A cross-sectional view of the overall structure of a servo stretch blow molding mechanism is provided for this utility model.

[0018] Figure 4 This utility model presents a partial three-dimensional view of a servo stretch blow molding mechanism.

[0019] Legend: 1. Rotating disk; 2. Fixed disk; 3. Support leg; 4. Rotating assembly; 41. Circular groove; 42. Gear ring; 43. Gear; 44. First drive motor; 5. Vertical plate; 6. Groove; 7. Drive assembly; 71. Moving block; 72. Screw; 73. Second drive motor; 8. Moving plate; 9. Bottle groove; 10. Limiting groove; 11. Limiting rod; 12. Square groove; 13. Limiting block. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] 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. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] Example 1, as Figure 1-4As shown, this utility model provides a servo stretch blow molding mechanism, including a rotating disk 1, a fixed disk 2 at the bottom of the rotating disk 1, vertical plates 5 fixedly connected at equal intervals at the top of the rotating disk 1 near the edge, four grooves 6 equally spaced at the top of the rotating disk 1, and movable plates 8 at the top of the rotating disk 1 above the grooves 6. Bottle mold grooves are formed inside the vertical plates 5 and the movable plates 8, and bottle grooves 9 are formed at the top of the vertical plates 5 and the movable plates 8 near the center; a rotating assembly 4 is mounted on the fixed disk 2; and a driving assembly 7 is mounted inside the grooves 6.

[0023] The overall effect of Embodiment 1 is as follows: a fixed plate 2 is provided at the bottom of the rotating disk 1; vertical plates 5 are fixedly connected at equal intervals to the top of the rotating disk 1 near its edge; four grooves 6 are equally spaced on the top of the rotating disk 1; and movable plates 8 are provided on the top of the rotating disk 1 above the grooves 6. Bottle mold grooves are formed inside the vertical plates 5 and the movable plates 8; and bottle slots 9 are formed on the top of the vertical plates 5 and the movable plates 8 near their centers. This allows the vertical plates 5 and the movable plates 8 to form molding grooves, enabling the preform to be formed. The rotating assembly 4, mounted on the fixed plate 2, drives the rotating disk 1 to rotate. The driving assembly 7, mounted inside the grooves 6, moves the movable plates 8.

[0024] Example 2, as Figure 1-4As shown, support legs 3 are fixedly connected at equal intervals to the bottom and near the edge of the fixed disk 2; the rotating assembly 4 includes a circular groove 41, which is formed on the top of the fixed disk 2. A gear ring 42 is embedded in and rotatably connected to the inside of the circular groove 41. The top of the gear ring 42 is fixedly connected to the bottom of the rotating disk 1. A gear 43 is meshed with the internal teeth of the gear ring 42. A first drive motor 44 is fixedly connected to the bottom of the fixed disk 2. The output end of the first drive motor 44 passes through the fixed disk 2 and is fixedly connected to the bottom of the gear 43; the driving assembly 7 includes four moving blocks 71. Each moving block 71 is embedded in the groove 6 and slidably connected to it. A screw 72 is threaded through and threaded into the inside of each moving block 71. One end of each screw 72 is connected to one end of the groove 6. The wall bearing is rotatably connected, and the other end of the screw 72 passes through the inner wall of the other end of the groove 6 and is rotatably connected to its bearing. A square groove 12 is opened at the bottom of the rotating disk 1 near the center. The inner wall of the square groove 12 is fixedly connected to the second drive motor 73. The output end of the second drive motor 73 is fixedly connected to one end of the screw 72. Limiting grooves 10 are opened at the top of the rotating disk 1 and on both sides of the groove 6. Limiting blocks 13 are embedded and slidably connected inside the limiting grooves 10. The top of the limiting blocks 13 is fixedly connected to the bottom of the moving plate 8. A limiting rod 11 passes through and slidably connects to the center of the limiting blocks 13. Both ends of the limiting rod 11 are fixedly connected to the inner walls of the two ends of the limiting groove 10. The bottle mold grooves inside the vertical plate 5 and the moving plate 8 are different.

[0025] The overall effect of embodiment 2 is as follows: Support legs 3 are fixedly connected at equal intervals to the bottom and near the edge of the fixed disk 2, which supports the bottom of the fixed disk 2; the rotating assembly 4 includes a circular groove 41, which is formed on the top of the fixed disk 2. A gear ring 42 is embedded in and rotatably connected to the groove 41, with its top fixedly connected to the bottom of the rotating disk 1. A gear 43 is meshed with the internal teeth of the gear ring 42. A first drive motor 44 is fixedly connected to the bottom of the fixed disk 2, and its output end passes through the fixed disk 2 and is fixedly connected to the bottom of the gear 43. This allows the first drive motor 44 to drive the gear 43 to rotate, which in turn drives the gear ring 42, which in turn drives the rotating disk 1 to rotate; the driving assembly 7 includes four moving blocks 71, each embedded in and slidably connected to a groove 6. A screw 72 is threaded through and threaded into each moving block 71, with one end of each screw 72 rotatably connected to the inner wall of one end of the groove 6. The other end of each plate passes through the inner wall of the groove 6 and is rotatably connected to its bearing. A square groove 12 is provided at the bottom of the rotating disk 1 near the center. The inner wall of the square groove 12 is fixedly connected to a second drive motor 73. The output end of the second drive motor 73 is fixedly connected to one end of the screw 72, which can drive the screw 72 to rotate. The rotation of the screw 72 can drive the moving block 71 to move. The movement of the moving block 71 can clamp the preform through the vertical plate 5. The top of the rotating disk 1 and located in the groove 6 Limiting grooves 10 are provided on both sides. Limiting blocks 13 are embedded and slidably connected inside the limiting grooves 10. The top of the limiting blocks 13 is fixedly connected to the bottom of the moving plate 8. A limiting rod 11 is slidably connected through the center of the limiting blocks 13. Both ends of the limiting rod 11 are fixedly connected to the inner walls of the limiting grooves 10. This can limit the bottom of the moving plate 8 by limiting the limiting rod 11 and the limiting blocks 13. Since the bottle mold grooves inside the vertical plate 5 and the moving plate 8 are different, the device can be used to form different types of bottles.

[0026] Working principle: By positioning the servo stretch blow molding mechanism near the mold installation area, ensuring a suitable spatial relationship between the mechanism and components such as the preform conveying track and the stretching mechanism, the preform can smoothly enter between the vertical plate 5 and the moving plate 8. At this time, the first drive motor 44 can drive the gear 43 to rotate, which in turn drives the gear ring 42 to rotate, which in turn drives the rotating disk 1 to rotate. The rotation of the rotating disk 1 can adjust the position of the upper mold, ensuring that the required clamping mold is positioned in a suitable spatial relationship between the preform conveying track, the stretching mechanism, and other components. When the preform is placed between the vertical plate 5 and the moving plate 8, the second drive motor 73 can drive the screw 72 to rotate, which in turn drives the moving block 71 to move. The moving block 71 can clamp the preform through the vertical plate 5, and then the stretch blow molding mechanism can achieve the desired preform forming effect.

[0027] The wiring diagrams of the first drive motor 44 and the second drive motor 73 in this utility model are common knowledge in the field. Their working principle is a well-known technology. The appropriate model is selected according to the actual use. Therefore, the control method and wiring arrangement of the first drive motor 44 and the second drive motor 73 will not be explained in detail.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A servo stretch blow molding machine comprising a rotating disc (1), characterized in that: The bottom of the rotating disk (1) is provided with a fixed disk (2), and the top of the rotating disk (1) and near the edge are fixedly connected with vertical plates (5) at equal intervals. The top of the rotating disk (1) is provided with four grooves (6) at equal intervals. The top of the rotating disk (1) and above the grooves (6) are provided with movable plates (8). Bottle mold grooves are provided inside the vertical plates (5) and the movable plates (8). Bottle grooves (9) are provided at the top of the vertical plates (5) and the movable plates (8) and near the center. Rotating assembly (4), which is mounted on fixed disk (2); A drive assembly (7) is installed inside a groove (6).

2. A servolongitudinal stretch blow molding apparatus according to claim 1, wherein: Support legs (3) are fixedly connected at equal intervals to the bottom of the fixed plate (2) and near the edge.

3. A servolongitudinal stretch blow molding apparatus according to claim 1, wherein: The rotating assembly (4) includes a circular groove (41) which is formed on the top of the fixed disk (2). A gear ring (42) is embedded in and rotatably connected to the inside of the circular groove (41). The top of the gear ring (42) is fixedly connected to the bottom of the rotating disk (1). The internal teeth of the gear ring (42) are meshed with a gear (43). A first drive motor (44) is fixedly connected to the bottom of the fixed disk (2). The output end of the first drive motor (44) passes through the fixed disk (2) and is fixedly connected to the bottom of the gear (43).

4. A servolongitudinal stretch blow molding apparatus according to claim 1, wherein: The drive assembly (7) includes four moving blocks (71), each of which is embedded in the groove (6) and slidably connected thereto. Each of the moving blocks (71) has a screw (72) threaded through and connected to it. One end of each screw (72) is rotatably connected to a bearing on the inner wall of one end of the groove (6), and the other end of each screw (72) is rotatably connected to a bearing on the other end of the groove (6). A square groove (12) is provided at the bottom of the rotating disk (1) near the center. A second drive motor (73) is fixedly connected to the inner wall of each square groove (12), and the output end of each second drive motor (73) is fixedly connected to one end of the screw (72).

5. A servolongitudinal stretch blow molding apparatus according to claim 1, wherein: Limiting grooves (10) are provided on the top of the rotating disk (1) and on both sides of the groove (6). A limiting block (13) is embedded and slidably connected inside the limiting groove (10). The top of the limiting block (13) is fixedly connected to the bottom of the moving plate (8). A limiting rod (11) is slidably connected through the center of the limiting block (13). Both ends of the limiting rod (11) are fixedly connected to the inner walls of both ends of the limiting groove (10).

6. A servolongitudinal stretch blow molding apparatus according to claim 1, wherein: The bottle mold grooves inside the vertical plate (5) and the movable plate (8) are different.

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