A plastic bottle preform air leakage detection device
By designing a simple plastic bottle preform leakage detection device, which utilizes a rotating plate and motor to achieve automated leakage detection and classification of preforms, the problem of high equipment modification costs in existing technologies is solved, and detection efficiency is improved while production costs are reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGXI DINGHUI PHARM PACKAGING CO LTD
- Filing Date
- 2025-09-22
- Publication Date
- 2026-08-04
AI Technical Summary
In existing technologies, using plastic bottle leak detection equipment to detect the preform requires modifications to the equipment structure, resulting in high processing costs.
Design a plastic bottle preform leakage detection device including a base, mounting bracket, leak detection module, fixing ring, rotating plate and motor. The device uses the rotating plate to drive the preform to detect leakage, and uses the limiting plate and motor to achieve automatic classification, simplifying the operation process.
It enables efficient air leakage detection of plastic bottle preforms, timely rejection of defective products, reduction of production costs, and reduction of finished product scrap due to air leakage.
Smart Images
Figure CN224594127U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field, and in particular to a device for detecting air leakage in plastic bottle preforms. Background Technology
[0002] Plastic preforms, also known as preforms or preforms, are key intermediate products in the production of plastic bottles (especially PET bottles). They are tubular, closed at one end and open at the other. After being heated, the preforms can be stretched into various shapes of plastic bottles through a blow molding process.
[0003] If the preform itself is damaged or leaks air due to other reasons during the processing of plastic bottle preforms, the damage will be further amplified under the action of air pressure during blow molding, which can easily result in defective products. Therefore, it is necessary to detect the air leakage of plastic bottle preforms before processing.
[0004] In the traditional plastic bottle production process, leak detection is usually carried out uniformly after the plastic bottle is formed using leak detection equipment, and defective products are rejected at the same time. Although this can reduce processing steps, blow molding still produces a lot of defective products due to leak problems. Since the preform and the plastic bottle have certain differences in structure, using the equipment for detecting leaks in plastic bottles to detect leaks in the preform requires a certain degree of modification to the equipment structure, resulting in higher processing costs.
[0005] Therefore, it is necessary to design a simple and easy-to-operate device for detecting air leakage in plastic bottle preforms. Utility Model Content
[0006] To overcome the drawbacks of requiring modifications to the equipment structure and incurring high processing costs when using equipment for detecting leaks in plastic bottles to detect leaks in preforms, the technical problem is to provide a simple and easy-to-operate device for detecting leaks in plastic bottle preforms.
[0007] The technical solution is as follows: A plastic bottle preform leakage detection device includes: a base and a mounting frame. The mounting frame is located at an eccentric position on the top of the base. A leak detection module is mounted on the mounting frame. A fixing ring is located on the top of the base. A preform inlet is opened on one side of the fixing ring. A base plate is located at the bottom of the fixing ring. A horizontal sliding groove is opened on the inner side of the base plate near the fixing ring. When the device is running, the structural reinforcement protrusion of the plastic bottle preform's mouth slides in the sliding groove. A rotating plate is rotatably mounted on the top of the base plate. Multiple limiting holes are evenly spaced in a ring on the side of the rotating plate. The bottom of each limiting hole has a groove that mates with the structural reinforcement protrusion of the plastic bottle preform's mouth. A gear ring is located on the inner side of the rotating plate. A gear is rotatably mounted on the top of the base plate near the gear ring via a shaft. A first motor for controlling the rotation of the gear is located on the bottom of the base plate directly opposite the gear.
[0008] Preferably, the system also includes a limiting plate, wherein the bottom of the base plate is rotatably provided at a position between the leak detection position and the outlet of the plastic bottle preform, the limiting plate is in contact with the rotating plate, the bottom plate below the fixing ring is provided with an opening directly opposite the rotating plate, and the bottom plate is provided with a second motor for controlling the rotation of the limiting plate.
[0009] Preferably, the device also includes extension rods, with extension rods provided on both sides of the inlet of the fixing ring.
[0010] Preferably, the device also includes a position sensor, with both the rotating plate and the top of the fixed ring having a position sensor.
[0011] Preferably, the plate also includes a limiting rod, which is provided on the outer side of the rotating plate and slides in contact with the fixing ring.
[0012] The beneficial effects of this utility model are: This utility model uses a leak detection module to sequentially detect the preforms, and the preforms that have been detected are also sent out from the fixed ring by the rotating plate, thus achieving the purpose of continuously detecting air leaks in the plastic bottle preforms. In addition, the device has a simple structure and is easy to operate. It can promptly remove unqualified bottle preforms to prevent them from entering subsequent blow molding, filling and other processes, reduce the scrap of finished products due to air leaks and lower production costs. Attached Figure Description
[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0014] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective.
[0015] Figure 3 This is a partial three-dimensional structural diagram of the present invention.
[0016] Figure 4 This is a three-dimensional structural diagram of the rotating plate and gear ring of this utility model.
[0017] Figure 5 This is a three-dimensional structural diagram of the fixing ring and base plate of this utility model from a bottom view.
[0018] Figure 6 This is a three-dimensional structural diagram of the base plate, rotating plate, and second motor of this utility model.
[0019] Explanation of reference numerals in the attached drawings: 1_base, 2_mounting bracket, 3_leak detection module, 4_fixing ring, 5_base plate, 6_rotating plate, 7_gear ring, 8_gear, 9_first motor, 10_limiting plate, 11_second motor, 13_extension rod, 14_position sensor, 15_limiting rod. Detailed Implementation
[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0021] Example 1 like Figures 1 to 6 As shown, this utility model provides a plastic bottle preform leakage detection device, which specifically includes a base 1, a mounting frame 2, a leak detection module 3, a fixing ring 4, a base plate 5, a rotating plate 6, a gear ring 7, a gear 8, and a first motor 9; The base 1 has an eccentric mounting bracket 2 at its top. The mounting bracket 2 has a leak detection module 3 of the same specifications as the bottle mouth of the plastic bottle preform. The leak detection module 3 is electrically connected to an external control device. A circular hole is located in the center of the top of the base 1, and a fixing ring 4 is installed inside this hole. A preform inlet is located on one side of the fixing ring 4. A base plate 5 is located at the bottom of the fixing ring 4, forming a complete plastic bottle preform movement path, including the preform inlet and outlet. A horizontal groove is located on the inner side of the base plate 5 near the fixing ring 4. The device operates... The structural reinforcement protrusion of the plastic bottle preform's mouth slides within the groove. A rotating plate 6 is rotatably provided on the top of the base plate 5, located inside the fixing ring 4. A limiting opening with the same diameter as the preform's mouth is provided at the horizontal quarter point of the rotating plate 6. A groove that mates with the structural reinforcement protrusion of the plastic bottle preform's mouth is opened at the bottom of the limiting opening. A gear ring 7 is provided on the inner side of the rotating plate 6. A gear 8 is rotatably provided on the top of the base plate 5 near the gear ring 7 via a shaft. A first motor 9 for controlling the rotation of the gear 8 is provided on the bottom of the base plate 5, directly opposite the gear 8. The first motor 9 is electrically connected to an external control device.
[0022] For example, in use, the plastic bottle preform is placed into the limiting port of the rotating plate 6 through the preform inlet of the base plate 5 and the fixing ring 4, ensuring that the protrusion on the plastic bottle preform contacts and engages with the groove of the limiting port. At this time, the plastic bottle preform is secured between the fixing ring 4 and the base plate 5 by the structurally reinforcing protrusion. Then, the first motor 9 is started, and the first motor 9 drives the gear ring 7 and the rotating plate 6 to rotate to the position directly below the leak detection module 3 through the gear 8. The plastic bottle preform is then moved to the position directly below the leak detection module 3, and the leak detection module 3 performs a leak detection on the plastic bottle preform. At this time, the next preform to be tested can be placed into another limiting port of the rotating plate 6 through the preform inlet of the base plate 5 and the fixing ring 4. After the test is completed, the leak detection module 3 transmits the test result to the external control device. At the same time, the rotating plate 6 drives the preform to rotate away from the position directly below the leak detection module 3, and the next preform to be tested is simultaneously moved to the leak detection module. Directly below module 3, subsequent leak detection is performed. The completed plastic bottle preforms are then fed into the preform outlet between the bottom plate 5 and the fixing ring 4. At this location, the bottom plate 5 no longer contacts the reinforcing protrusions of the plastic bottle preform, allowing the preform to detach directly from the equipment body through the outlet. Workers can then classify the plastic bottle preforms based on the test results. Thus, the first motor 9 continuously drives the intermittent rotation of the rotating plate 6, causing the preform to move within the bottom plate 5 and the fixing ring 4. As the preform moves along the path, the leak detection module 3 sequentially tests the preforms. The completed preforms are then sent out of the fixing ring 4 by the rotating plate 6, achieving continuous leak detection of the plastic bottle preforms. The device has a simple structure, is easy to operate, and can promptly remove unqualified preforms, preventing them from entering subsequent processes, reducing finished product scrap due to leaks, and lowering production costs.
[0023] like Figure 5 and Figure 6 As shown, it also includes a limiting plate 10 and a second motor 11. The bottom of the base plate 5 is rotatably provided with the limiting plate 10 at a position between the leak detection position and the outlet of the plastic bottle preform. The limiting plate 10 is in contact with the rotating plate 6. The bottom plate 5 is provided with an opening directly below the fixed ring 4 and facing the rotating plate 6. The bottom plate 5 is provided with a second motor 11 to control the rotation of the limiting plate 10. The second motor 11 is electrically connected to an external control device.
[0024] As the tested embryo moves towards the outlet of the base plate 5 and the fixing ring 4, the external control device can control the second motor 11 to drive the limiting plate 10 based on the detection results of the leak detection module 3. Initially, the limiting plate 10 is flipped up and tightly attached to the rotating plate 6. The end of the limiting plate 10 closest to the embryo cooperates with the rotating plate 6, so that the reinforcing protrusion of the embryo can be kept between the limiting plate 10 and the rotating plate 6. At the same time, the fixing ring 4 can prevent the embryo from shifting to the outside of the rotating plate 6. At this time, the embryo can move normally with the rotating plate 6. When the leak detection module 3 detects the embryo... When a leak occurs, the external control device receives a signal and controls the second motor 11 to drive the limit plate 10 to rotate downwards. The limit plate 10 is no longer in contact with the rotating plate 6. When the problematic preform moves to this position, there is no other object to limit the bottom of the plastic bottle preform, and the plastic bottle preform falls directly from the bottom plate 5 of the rotating plate 6. Subsequently, when a normal plastic bottle preform is detected, the second motor 11 controls the limit plate 10 to flip up again, allowing the plastic bottle preform to pass normally. This achieves rapid and automatic differentiation between good and defective plastic bottle preforms, reduces manual operation, and improves work efficiency.
[0025] like Figures 1 to 3 As shown, it also includes an extension rod 13, and the extension rod 13 is provided on both sides of the preform inlet of the plastic bottle preform moving path formed by the fixing ring 4 and the base plate 5.
[0026] The extension rod 13 facilitates the insertion of the plastic bottle preform, making it easier for the plastic bottle preform to be inserted into the groove between the bottom plate 5 and the fixing ring 4.
[0027] like Figures 1 to 3 As shown, it also includes a position sensor 14, and both the rotating plate 6 and the fixed ring 4 are equipped with position sensors 14 at their tops.
[0028] The position sensor 14 at the top of the rotating plate 6 and the fixed ring 4 enables the rotating plate 6 to determine its position more accurately when rotating, ensuring that the plastic bottle preform moves to the correct position for operation.
[0029] like Figure 3 and Figure 4 As shown, it also includes a limiting rod 15. The limiting rod 15 is provided on the outer side of the rotating plate 6, and the limiting rod 15 slides in contact with the fixing ring 4.
[0030] The limiting rod 15 on the outer side of the rotating plate 6 can prevent the plastic bottle preform from getting stuck in other positions of the rotating plate 6 while keeping the structure of the rotating plate 6 as simple as possible.
[0031] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A device for detecting air leakage in a plastic bottle preform, characterized in that, include: The base (1) and the mounting bracket (2) are provided. The mounting bracket (2) is provided at the eccentric position on the top of the base (1). The mounting bracket (2) is provided with a leak detection module (3). The base (1) is provided with a fixing ring (4) on the top. The fixing ring (4) has a preform inlet on one side. The fixing ring (4) has a base plate (5) at the bottom. The base plate (5) has a horizontal sliding groove on the inner side and near the fixing ring (4). When the device is running, the structural reinforcement protrusion of the plastic bottle preform mouth slides in the sliding groove. The base plate (5) has a rotating plate (6) on the top. The rotating plate (6) has multiple limit ports evenly spaced in a ring on the side. The bottom of the limit port has a groove that matches the structural reinforcement protrusion of the plastic bottle preform mouth. The rotating plate (6) has a gear ring (7) on the inner side. The base plate (5) has a gear (8) on the top near the gear ring (7) that rotates through a shaft. The base plate (5) has a first motor (9) at the bottom facing the gear (8) to control the rotation of the gear (8).
2. The plastic bottle preform leak detection apparatus of claim 1, wherein, Also includes: A limiting plate (10) is rotatably provided at the bottom of the base plate (5) between the leak test position and the outlet of the plastic bottle preform. The limiting plate (10) is in contact with the rotating plate (6). The bottom plate (5) directly below the fixing ring (4) and facing the rotating plate (6) has an opening. The bottom plate (5) is provided with a second motor (11) to control the rotation of the limiting plate (10).
3. The plastic bottle preform leak detection apparatus of claim 2, wherein, Also includes: Extension rod (13) is provided on both sides of the inlet of the fixing ring (4).
4. The plastic bottle preform leak detection apparatus of claim 3, wherein, Also includes: Position sensor (14) is provided on the top of both the rotating plate (6) and the fixed ring (4).
5. The plastic bottle preform leak detection apparatus of claim 4, wherein, Also includes: Limiting rod (15): The outer side of the rotating plate (6) is provided with a limiting rod (15), and the limiting rod (15) slides in contact with the fixing ring (4).