Plastic bottle air tightness detection line

Abstract

The utility model provides a plastic bottle air tightness detection line, and belongs to the technical field of plastic bottle production equipment. Comprising a conveying belt, a blocking mechanism, an air tightness detection mechanism and a removing mechanism, a mounting plate is detachably connected to the conveying belt, a sliding sleeve is fixedly arranged on the mounting plate, a guide column is slidably connected into the sliding sleeve in the conveying line feeding direction, a pressing plate is fixedly arranged at the front end of the guide column, and a positioning plate is fixedly arranged at the rear end of the guide column; two position sensors matched with the positioning plates are arranged on the conveying line at intervals. A reset spring arranged on the guide column in a sleeving mode is connected between the sliding sleeve and the positioning plate. The air tightness detection device has the advantages of being capable of improving air tightness detection reliability and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic bottle production equipment and relates to an airtightness detection line for plastic bottles. Background Art

[0002] For dark-colored plastic bottles, after airtightness detection, manual optical inspection (appearance inspection) is required. At present, the airtightness detection device inspects each plastic bottle passing through in sequence on the plastic bottle conveyor line, intercepts the conveyor line at the optical inspection position, and manually picks and inspects each bottle one by one from the end of the interception point. After inspection, the qualified products are placed on the conveyor line after the interception point. Since the rhythm of manual operation cannot be synchronized with the rhythm of airtightness detection, there is a situation where the airtightness detection speed is greater than the manual optical inspection speed, which causes the plastic bottles before the interception point to be squeezed against each other. In the state of mutual extrusion, it is easy to have false detection in the airtightness detection of plastic bottles (the airtightness detection is to longitudinally press a sealing head at the mouth of the plastic bottle and judge the airtightness of the plastic bottle by inflating and measuring the air pressure. The mutual extrusion of the bottle bodies will cause the plastic bottles to be out of position, resulting in poor sealing when the sealing head presses the bottle mouth, and then causing air leakage. This situation will be judged as air leakage of the bottle body, resulting in false detection). Summary of the Utility Model

[0003] The purpose of the utility model is to provide an airtightness detection line for plastic bottles in view of the above problems existing in the prior art. The technical problem to be solved by the utility model is how to improve the reliability of airtightness detection.

[0004] The purpose of the utility model can be achieved by the following technical solutions: An airtightness detection line for plastic bottles, including a conveyor belt, a baffle mechanism, an airtightness detection mechanism and a rejection mechanism, characterized in that a mounting plate is detachably connected to the conveyor belt, a sliding sleeve is fixedly arranged on the mounting plate, a guiding column is slidably connected in the sliding sleeve along the feeding direction of the conveyor line, a pressing plate is fixedly arranged at the front end of the guiding column, a positioning plate is fixedly arranged at the rear end of the guiding column, and two position sensors cooperating with the positioning plate are arranged at intervals on the conveyor belt; a return spring sleeved on the guiding column is connected between the sliding sleeve and the positioning plate.

[0005] The section between the mounting plate and the baffle mechanism is the bottle storage section. The optical inspection operator takes the plastic bottles at the end of this area, that is, the plastic bottles before the mounting plate, for inspection, and takes the qualified products to the conveyor belt after the mounting plate. The baffle mechanism is in the open state before the bottle storage section is full. Since the bottle storage section is not full, the extrusion force on the pressure plate is small. When the bottle storage section is full, the plastic bottles squeeze the pressure plate and stretch the return spring. The positioning plate can be detected by the position sensor near the end of the conveyor belt. The control unit obtains this signal to control the baffle mechanism to change from the open state to the stop state. At the same time, the airtightness detection mechanism also pauses operation. When the bottle storage section returns to the relaxed state again, the positioning plate is detected by another position sensor under the action of the return spring. Similarly, it is used to control the baffle mechanism to reopen, and the airtightness detection mechanism also resumes operation again.

[0006] This solution aims to coordinate the synchronization problem between manual operation and machine automation operation, ensure that the bottle storage section is always in a loose state, and avoid the mutual extrusion between plastic bottles in the bottle storage section from affecting the reliability of airtightness detection.

[0007] The baffle mechanism is a mechanism that can intercept the plastic bottles in front of the conveyor line. It can be a cylinder, and the push rod of the cylinder extends towards the middle of the conveyor belt to intercept the movement of the plastic bottles.

[0008] The rejection mechanism can remove the plastic bottles with unqualified airtightness from the conveyor belt. Description of the Drawings

[0009] Figure 1 It is a schematic structural diagram of the airtightness detection line after the airtightness detection mechanism is removed.

[0010] Figure 2 It is a schematic structural diagram after the airtightness detection mechanism is installed.

[0011] Figure 3 It is a schematic connection structure diagram of the sliding sleeve and the related accessories connected thereto.

[0012] In the figure, 1. Conveyor belt; 2. Baffle mechanism; 3. Airtightness detection mechanism; 4. Rejection mechanism; 5. Mounting plate; 6. Sliding sleeve; 7. Guide post; 8. Pressure plate; 9. Positioning plate; 10. Position sensor; 11. Return spring. Detailed Implementation Modes

[0013] The following are specific embodiments of the present invention and in combination with the drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0014] As Figure 1 、 Figure 2 and Figure 3As shown in the figure, the airtightness detection line of the plastic bottle includes a conveyor belt 1, a baffle mechanism 2, an airtightness detection mechanism 3, and a rejection mechanism 4. A mounting plate 5 is detachably connected to the conveyor belt 1. A sliding sleeve 6 is fixedly arranged on the mounting plate 5. A guide post 7 is slidably connected in the sliding sleeve 6 along the feeding direction of the conveyor line. A pressing plate 8 is fixedly arranged at the front end of the guide post 7. A positioning plate 9 is fixedly arranged at the rear end of the guide post 7. Two position sensors 10 cooperating with the positioning plate 9 are arranged at intervals on the conveyor line. A return spring 11 sleeved on the guide post 7 is connected between the sliding sleeve 6 and the positioning plate 9.

[0015] The section between the mounting plate 5 and the baffle mechanism 2 is the bottle storage section. The optical inspection operator takes the plastic bottles at the end of this area, that is, the plastic bottles before the mounting plate 5 for inspection, and takes the qualified products to the conveyor belt 1 after the mounting plate 5. The baffle mechanism 2 is in the open state before the bottle storage section is full. Since the bottle storage section is not full, the extrusion force received by the pressing plate 8 is small. When the bottle storage section is full, the plastic bottles squeeze the pressing plate 8 and stretch the return spring 11. The positioning plate 9 can be detected by the position sensor 10 near the end of the conveyor belt 1. The control unit obtains this signal to control the baffle mechanism 2 to change from the open state to the stop state. At the same time, the airtightness detection mechanism 3 also pauses operation. When the bottle storage section returns to the relaxed state again, the positioning plate 9 is detected by another position sensor 10 under the action of the return spring 11. Similarly, it is used to control the baffle mechanism 2 to reopen, and the airtightness detection mechanism 3 also resumes operation again.

[0016] The cooperation between the positioning plate 9 and the position sensor 10 is a conventional means in the art, which can be in the form of optoelectronics or mechanical triggering.

[0017] The purpose of this solution is to coordinate the synchronization problem between manual operation and machine automation operation, ensure that the bottle storage section is always in a loose state, and avoid the mutual extrusion between the plastic bottles in the bottle storage section, which affects the reliability of airtightness detection.

[0018] The baffle mechanism 2 is a mechanism that can intercept the plastic bottles in front of the conveyor line. It can be a cylinder, and the push rod of the cylinder extends towards the middle of the conveyor belt 1 to intercept the movement of the plastic bottles.

[0019] The rejection mechanism 4 can remove the plastic bottles with unqualified airtightness from the conveyor belt 1.

[0020] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A plastic bottle air tightness testing line, comprising a conveyor belt (1), a barrier mechanism (2), an air tightness testing mechanism (3) and a rejection mechanism (4), characterized in that: A mounting plate (5) is detachably connected to the conveyor belt (1), a sliding sleeve (6) is fixedly arranged on the mounting plate (5), a guide column (7) is slidably connected in the sliding sleeve (6) along the material feeding direction of the conveyor line, a pressure plate (8) is fixedly arranged at the front end of the guide column (7), a positioning plate (9) is fixedly arranged at the rear end of the guide column (7), and two position sensors (10) cooperating with the positioning plate (9) are alternately arranged on the conveyor line; a return spring (11) sleeved on the guide column (7) is connected between the sliding sleeve (6) and the positioning plate (9).

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