Movable manual lamp inspection frame for plastic bottle blanks

Abstract

The utility model provides a movable manual lamp inspection frame for plastic bottle blanks, which comprises a support frame, a light-transmitting conveyor belt and a detection light source, the light-transmitting conveyor belt is mounted at the top of the support frame, and the detection light source is mounted in the middle of the light-transmitting conveyor belt so as to irradiate the bottle blanks conveyed on the upper surface of the light-transmitting conveyor belt; the supporting frame comprises a supporting rod and a cross beam, the cross beam is fixedly connected with the supporting rod, universal wheels and a brake pedal are arranged at the bottom of the supporting rod, and the supporting rod is of a telescopic rod structure. According to the movable manual lamp inspection frame for the plastic bottle blanks, the detection light source is directly mounted in the middle of the light-transmitting conveying belt, so that the bottle blanks can be uniformly and efficiently irradiated in the conveying process, and the detection efficiency is remarkably improved; and the height of the light-transmitting conveying belt can be adjusted according to production requirements, scraping damage in the bottle blank conveying process is effectively reduced, and the manual lamp inspection frame is convenient to use and overhaul.

Description

Technical Field

[0001] The utility model relates to the technical field of preform quality inspection, in particular to a movable manual light inspection rack for plastic bottle preforms. Background Art

[0002] PET preforms are intermediate products injection-molded from polyethylene terephthalate materials. PET preforms can be further processed into common container products in daily life, such as plastic bottles and spray bottles, through blow molding.

[0003] In current PET preform production, to ensure the product quality of preforms, it is often necessary to conduct quality inspections on each batch of PET preforms to detect whether there are impurities and bubbles in the side walls of the preforms. In the existing defect detection process of PET preforms, the preforms are placed on a workbench that can emit light, or irradiated by a light source on the preforms, and then the bottle body is directly observed by the naked eye to detect the bottle body. Manual detection is easily affected by many factors. For example, the distance between the detection light and the preform to be detected or the light intensity will affect the quality inspection results, resulting in large detection errors.

[0004] CN116593484A discloses a device for detecting impurities in the bottle body of a preform, which relates to the technical field of preform detection. It includes a box body. A rotating shaft is rotatably arranged between the front and rear walls of the box body. A rotating block is fixedly arranged on the rotating shaft. A rotating cylinder is rotatably arranged in the rotating block. A driving component for driving the rotating cylinder to rotate is arranged on the rotating block. One end of the rotating cylinder extends outside the rotating block and is fixedly provided with a placing seat. A protection tube is installed at the center of the placing seat. The diameter of the protection tube is smaller than the inner diameter of the preform. The protection tube is made of a transparent material and a lamp tube is arranged inside it. A projection screen is arranged on one side of the protection tube in the box body. The distance between the projection screen and the outer wall of the preform is greater than the distance between the inner wall of the preform and the lamp tube. This device for detecting impurities in the bottle body of a preform can only detect one preform at a time, and its detection efficiency is low, making it difficult to meet the requirement of batch detection of preforms in a short time. Moreover, the height of the detection device is fixed, and it is easy to cause damage when the preform enters the detection device from the extrusion equipment.

[0005] Therefore, it is necessary to develop a movable manual light inspection rack for plastic bottle preforms with a simple structure and convenient for batch detection of preform quality. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a movable manual light inspection rack for plastic bottle preforms with a simple structure, convenient for batch detection of preform quality, and capable of reducing the damage phenomenon during the preform conveying process.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] A movable artificial lamp inspection rack for plastic bottle preforms, comprising a support frame, a light-transmitting conveyor belt and a detection light source. The light-transmitting conveyor belt is installed on the top of the support frame, and the detection light source is installed in the middle of the light-transmitting conveyor belt to irradiate the preforms conveyed on the upper surface of the light-transmitting conveyor belt. The support frame includes support rods and cross beams, the cross beams are fixedly connected to the support rods, and universal rollers and brake pedals are provided at the bottoms of the support rods. The support rods are of telescopic rod structure, which is convenient for adjusting the installation height of the conveyor belt according to the height of the outlet of the preform production equipment and the preform finished product collection box.

[0009] The light-transmitting conveyor belt is a belt body made of light-transmitting materials and can be used as a conveyor belt, such as a light-transmitting PU conveyor belt. In actual application, the light-transmitting conveyor belt is generally used in combination with a conveyor for conveying, that is, the conveyor belt is installed on the conveyor frame. Generally, two rollers are provided on the conveyor frame, and the rollers are generally driven by a motor to rotate, so that the light-transmitting conveyor belt rotates under the drive of the rollers to convey the preforms. Among them, the detection light source is preferably arranged between the rotary light-transmitting conveyor belts, that is, the light source is arranged below the light-transmitting conveyor belt on the side that plays the role of conveying.

[0010] The detection light source is preferably a shadowless light source. Among them, the shadowless light source adopts a unique irradiation structure, and the light emitted from the LED is evenly diffused and irradiated. The flexible circuit board is fixed at a 90-degree irradiation angle and is refracted by the diffuser plate and then irradiated on the object to be measured at a low angle to perform efficient low-angle illumination on the target area to enhance the surface features.

[0011] In a certain exemplary embodiment, a receiving plate is provided on one side of the support frame. One end of the receiving plate is hinged to the support frame and can rotate relative to the support frame, and baffle plates are provided on both sides thereof.

[0012] In a certain exemplary embodiment, flexible anti-collision cushions are attached to the top of the receiving plate and the inner side surface of the baffle plate. The flexible anti-collision cushions can be plastic bubble anti-collision films or deformable rubber pads, etc.

[0013] In a certain exemplary embodiment, a detection light source fixing assembly is provided in the middle of the light-transmitting conveyor belt. The detection light source fixing assembly includes a slide rail fixed on the support frame and a drawer slidably connected to the slide rail. The detection light source is fixedly installed on the bottom plate of the drawer, and reflective paper is attached to the bottom plate and the inner side wall thereof. A control knob of the detection light source is provided on the outer surface of the drawer. The drawer-type detection light source fixing assembly is convenient for the maintenance of the detection light source.

[0014] In a certain exemplary embodiment, a diversion device is provided above the light-transmitting conveyor belt. The diversion device includes diversion plates and height-limiting plates symmetrically arranged vertically. The height-limiting plates are arranged at the top of the diversion plates near the end close to the material receiving plate. The diversion plates include integrally formed arc-shaped diversion plates and main diversion plates arranged between the arc-shaped diversion plates. The main diversion plates are tangentially connected to the arc-shaped diversion plates. The space between the main diversion plates forms a detection channel for the preforms to enter the light-transmitting conveyor belt, ensuring that the preforms are located above the detection light source. The arc-shaped diversion plates reduce the collision between the preforms and the diversion plates during the conveying process. The height-limiting plates place the preforms horizontally on the light-transmitting conveyor belt, preventing the preforms from entering the detection channel in a standing state (if the preforms enter the detection channel in a standing state, the detection light source cannot fully irradiate the side walls of the preforms, which will affect the detection results of the quality of the preforms). The diversion plates do not contact the light-transmitting conveyor belt and have a certain distance from it, and can be set in the form of brackets. When the light-transmitting conveyor belt is installed on the support frame, the height-limiting plates can be assembled in cooperation with the frame of the light-transmitting conveyor belt.

[0015] In a certain exemplary embodiment, the width of the height-limiting plate is consistent with the distance between the diversion plates. The end close to the material receiving plate is provided with an upward arc-shaped free end, which has a smooth transition effect during the conveying process of the preforms, reducing the impact force of the standing preforms on the front end of the height-limiting plate, extending the service life of the height-limiting plate, and ensuring the use safety at the same time.

[0016] In a certain exemplary embodiment, the manual lamp inspection rack further includes a magnifying glass arranged on the support frame. The magnifying glass is located above the light-transmitting conveyor belt, facilitating the operator to further view the lamp inspection results of the preforms through the magnifying glass.

[0017] In a certain exemplary embodiment, a bracket for placing a waste collection bag is provided on the side of the support frame below the light-transmitting conveyor belt. The bracket is equipped with a movable buckle for fixing the waste collection bag, facilitating the operator to remove and collect the preforms with unqualified lamp inspection results from the light-transmitting conveyor belt, as well as the fixing and replacement of the waste collection bag.

[0018] The beneficial effects of a movable manual lamp inspection rack for plastic bottle preforms of the present utility model:

[0019] By directly installing the detection light source in the middle of the light-transmitting conveyor belt, the present utility model can ensure that the preforms are uniformly and efficiently irradiated during the transmission process, enabling the inspectors to clearly observe the defects such as impurities, bubbles, and cracks inside the preforms, thereby significantly improving the detection efficiency and accuracy; and can adjust the height of the light-transmitting conveyor belt according to production requirements, reducing the height difference between the conveyor belt and the discharge port of the preform production equipment, and further reducing the scratching damage during the conveying process of the preforms.

[0020] The drawer - type design makes the maintenance and repair of the detection light source extremely convenient. When it is necessary to replace the light source, adjust the position, or perform cleaning and maintenance, the operator only needs to simply draw out the drawer from the slide rail, without disassembling complex fixing structures or interrupting the operation of the production line. This not only improves the maintenance efficiency but also reduces the maintenance cost.

[0021] The diversion device forms an orderly detection channel for the preforms to enter the light - transmissive conveyor belt through the combination of the main diversion plate and the arc - shaped diversion plate, enabling the preforms to enter the detection channel in a flat - lying state, increasing the irradiation area of the detection light source on the preforms. Combined with the use of magnifying glasses, as the light - transmissive conveyor belt moves, it is convenient for the staff to perform batch detection of the preforms, improving the detection efficiency. Brief Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of the movable manual inspection rack for plastic preforms of the first embodiment of the present utility model;

[0023] Figure 2 It is a schematic structural diagram of the movable manual inspection rack for plastic preforms of the first embodiment of the present utility model (with the detection light source fixing component in the open state);

[0024] Figure 3 It is a schematic structural diagram of the movable manual inspection rack for plastic preforms of the second embodiment of the present utility model;

[0025] Figure 4 It is a schematic structural diagram of the movable manual inspection rack for plastic preforms of the second embodiment of the present utility model (with the detection light source fixing component in the open state).

[0026] Wherein: 1. Feeding plate, 2. Baffle plate, 3. Flexible anti - collision cushion, 4. Light - transmissive conveyor belt, 5. Detection light source, 6. Reflective paper, 7. Control knob, 8. Drawer, 9. Support rod, 10. Cross beam, 11. Brake pedal, 12. Universal roller, 13. Waste collection bag, 14. Bracket, 15. Movable buckle, 16. Slide rail, 17. Arc - shaped diversion plate, 18. Height - limiting plate, 19. Main diversion plate, 20. Magnifying glass. Detailed Description of the Embodiments

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] Embodiment 1

[0029] Refer toFigure 1 and 2 , a movable manual lamp inspection rack for plastic bottle preforms in this embodiment, includes a support frame, a light-transmitting conveyor belt 4 and a detection light source 5. The light-transmitting conveyor belt 4 is installed on the top of the support frame, and the detection light source 5 is installed in the middle of the light-transmitting conveyor belt 4 to irradiate the bottle preforms conveyed on the upper surface of the light-transmitting conveyor belt 4. The support frame includes support rods 9 and a cross beam 10. The cross beam 10 is fixedly connected to the support rods 9. Universal rollers 12 and a brake pedal 11 are provided at the bottom of the support rods 9. The support rods 9 are of telescopic rod structure, which is convenient for adjusting the installation height of the conveyor belt according to the height of the outlet of the bottle preform production equipment and the height of the bottle preform finished product collection box.

[0030] The light-transmitting conveyor belt 4 is a light-transmitting PU conveyor belt. In actual application, the light-transmitting conveyor belt 4 is generally conveyed in cooperation with a conveyor, that is, the conveyor belt is installed on a conveyor frame. Generally, two rollers are provided on the conveyor frame, and the rollers are generally driven by a motor to rotate, so that the light-transmitting conveyor belt 4 rotates under the drive of the rollers to convey the bottle preforms. Among them, the detection light source 5 is preferably arranged between the rotary light-transmitting conveyor belts 4, that is, the light source is arranged below the light-transmitting conveyor belt 4 on the side that plays a conveying role.

[0031] The detection light source 5 is preferably a shadowless light source. Among them, the shadowless light source adopts a unique irradiation structure. The light emitted from the LED is evenly diffused and irradiated. The flexible circuit board is fixed at a 90-degree irradiation angle and is refracted by the diffuser plate and then irradiated on the object to be measured at a low angle to perform efficient low-angle illumination on the target area to enhance the surface features.

[0032] For this movable manual lamp inspection rack for plastic bottle preforms, when the height of the light-transmitting conveyor belt 4 changes, it is no longer necessary to adjust the position of the detection light source 5 for lamp inspection, which avoids the influence of the distance of the detection light source 5 on the quality detection of the bottle preforms. Moreover, the height of the light-transmitting conveyor belt 4 can be adjusted according to the height of the operator and the height of the PET bottle preform production equipment, avoiding the phenomenon that the bottle preforms collide and are damaged due to too large a descending height during transportation; the combined design of the detection light source 5 and the light-transmitting conveyor belt 4 simplifies the structure of the existing bottle preform transportation and manual lamp inspection rack, and reduces the manufacturing cost of the detection equipment.

[0033] A receiving plate 1 is provided on one side of the support frame. One end of the receiving plate 1 is hinged to the support frame and can rotate relative to the support frame. Baffle plates 2 are provided on both sides of it. A locking mechanism for controlling the rotation angle is provided on the side surface of the receiving plate 1. The locking mechanism can be a common screw and locking nut, or other locking components for locking the rotation angle of the rotating parts in the prior art can also be adopted.

[0034] A flexible anti-collision cushion 3 is attached to the top of the blank receiving plate 1 and the inner side of the material blocking plate 2. The flexible anti-collision cushion 3 can be a plastic bubble anti-collision film or a deformable rubber pad, etc. Preferably, the thickness of the flexible anti-collision cushion 3 gradually decreases from the feed end to the discharge end of the blank receiving plate 1, thereby reducing the difference when the preforms on the blank receiving plate 1 enter the light-transmitting conveyor belt 4, and at the same time avoiding affecting the rotation angle of the blank receiving plate 1 relative to the light-transmitting conveyor belt 4 due to the thickness of the flexible anti-collision cushion 3.

[0035] A detection light source 5 fixing assembly is provided in the middle of the light-transmitting conveyor belt 4. The detection light source 5 fixing assembly includes a slide rail 16 fixed on the support frame and a drawer 8 slidably connected to the slide rail 16. The detection light source 5 is fixedly installed on the bottom plate of the drawer 8, and reflective paper 6 is attached to its bottom plate and inner side wall. A control knob 7 of the detection light source 5 is provided on the outer surface of the drawer 8. The drawer 8 type detection light source 5 fixing assembly is adopted, which is convenient for the maintenance of the detection light source 5.

[0036] A bracket 14 for placing a waste collection bag 13 is provided on the side of the support frame below the light-transmitting conveyor belt 4, and the bracket 14 is provided with a movable buckle 15 for fixing the waste collection bag 13. It is convenient for the operator to remove and collect the preforms with unqualified lamp inspection from the light-transmitting conveyor belt 4.

[0037] Embodiment 2

[0038] Referring to Figure 3 and 4 , compared with Embodiment 1, a movable manual lamp inspection rack for plastic bottle preforms in this embodiment has the following differences:

[0039] Above the light-transmitting conveyor belt 4, there is a diversion device. The diversion device includes diversion plates and height-limiting plates 18 symmetrically arranged vertically. The height-limiting plates 18 are arranged at the tops of the diversion plates close to one end of the material receiving plate 1. Among them, the diversion plates include integrally formed arc-shaped diversion plates 17 and main diversion plates 19 arranged between the arc-shaped diversion plates 17. The main diversion plates 19 are tangentially connected to the arc-shaped diversion plates 17. Preferably, both the arc-shaped diversion plates 17 and the main diversion plates 19 are made of light-impermeable materials, and the inner sides of the main diversion plates 19 are coated with reflective materials, which can further enhance the irradiation intensity of the detection light source 5 on the preforms. The space between the main diversion plates 19 forms a detection channel for the preforms to enter the light-transmitting conveyor belt 4, ensuring that the preforms are located above the detection light source 5. The arc-shaped diversion plates 17 reduce the collision between the preforms and the diversion plates during transportation. The height-limiting plates 18 place the preforms horizontally on the light-transmitting conveyor belt 4, preventing the preforms from entering the detection channel in a standing state (if the preforms enter the detection channel in a standing state, the detection light source 5 cannot fully irradiate the side walls of the preforms, which will affect the detection results of the preform quality). The diversion plates do not contact the light-transmitting conveyor belt 4 and have a certain distance from it, and can be set in the form of brackets 14. When the light-transmitting conveyor belt 4 is installed on the support frame, the assembly of the height-limiting plates 18 can be realized in cooperation with the frame of the light-transmitting conveyor belt 4. The width of the height-limiting plates 18 is consistent with the distance between the diversion plates. One end of the height-limiting plates 18 close to the material receiving plate 1 is provided with a free end in the shape of an upward arc, which has a smooth transition effect during the transportation of the preforms, reduces the impact force of the standing preforms on the front end of the height-limiting plates 18, extends the service life of the height-limiting plates 18, and also ensures the use safety.

[0040] The manual lamp inspection rack further includes a magnifying glass 20 arranged on the support frame. The magnifying glass 20 is located above the light-transmitting conveyor belt 4. Operators can view the quality of the preforms through the magnifying glass 20. In particular, smaller black dots or bubbles on the preforms are more conducive to being observed by operators after being magnified by the magnifying glass 20, thereby improving the quality inspection.

[0041] The working principle and usage method of a movable manual lamp inspection rack for plastic bottle preforms of the present utility model:

[0042] During use, the operator moves the manual lamp inspection rack to the discharge port of the corresponding preform production equipment as needed, then adjusts the height of the support frame of the transparent conveyor belt according to the height of the discharge port, and then rotates the receiving plate 1 relative to the support frame so that the free end of the receiving plate 1 is directly below the discharge port of the preform production equipment, facilitating the preforms to slide onto the transparent conveyor belt through the feeding plate. Under the action of the height limiting plate 18, the preforms enter the inspection channel between the diversion plates in a flat state. The transparent conveyor belt drives the preforms to move, and the inspection light source 5 below the transparent conveyor belt emits an inspection beam. When the inspection beam passes through the preform body, if there are impurities or bubbles in the preform, the light is blocked or refracted, and the operator can clearly observe the phenomenon of shadow or uneven light, and then remove the preforms of unqualified quality on the transparent conveyor belt and put them into the waste collection bag 13 on one side. The waste collection bag 13 is fixed to the support 14 through the movable buckle 15. If the waste collection bag 13 is full of waste and needs to be replaced, just open the movable buckle 15 on the support 14 to quickly replace the waste collection bag 13. The preforms that pass the lamp inspection enter the finished product collection box through the transparent conveyor belt and then enter the subsequent production process.

[0043] The operator adjusts the brightness of the inspection light source 5 according to the brightness of the inspection light source 5 required for lamp inspection of preforms with different wall thicknesses through the control knob 7 on the outer surface of the drawer 8. When lamp inspection is not required, the inspection light source 5 can also be turned off through the control knob 7. This manual lamp inspection rack can only use the conveying function of the transparent conveyor belt.

[0044] When the inspection light source 5 fails, the staff can pull out the drawer 8 of the inspection light source 5 fixing component, slide it along its slide rail 16 and move it out from below the transparent conveyor belt, so as to repair or replace the inspection light source 5.

[0045] Finally, it should be noted that the above are only the preferred embodiments of the present invention, which are only used to illustrate the technical solutions of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are all included in the protection scope of the present invention.

Claims

1. A movable artificial light inspection rack for plastic bottle preforms, characterized in that: The invention comprises a support frame, a light-transmitting conveyor belt (4) and a detection light source (5), wherein the light-transmitting conveyor belt (4) is installed on the top of the support frame, and the detection light source (5) is installed in the middle of the light-transmitting conveyor belt (4) to irradiate the bottle blanks transported on the upper surface of the light-transmitting conveyor belt (4); the support frame comprises a support rod (9) and a crossbeam (10), wherein the crossbeam (10) is fixedly connected to the support rod (9), a universal roller (12) and a brake pedal (11) are provided at the bottom of the support rod (9), and the support rod (9) is a telescopic rod structure.

2. The movable artificial light inspection rack for plastic bottle blanks according to claim 1, characterized in that: The light-transmitting conveyor belt (4) is a belt body made of light-transmitting material and can be used as a conveyor belt, and the detection light source (5) is a shadowless light source.

3. The movable artificial light inspection rack for plastic bottle blanks according to claim 1, characterized in that: A material receiving plate (1) is provided on one side of the support frame, one end of the material receiving plate (1) is hinged to the support frame and can rotate relative to the support frame, and material blocking plates (2) are provided on both sides thereof.

4. The movable artificial light inspection rack for plastic bottle blanks according to claim 3, characterized in that: A flexible anti-collision pad (3) is attached to the top of the material receiving plate (1) and the inner side of the material blocking plate (2).

5. The movable artificial light inspection rack for plastic bottle preforms according to claim 1, characterized in that: A detection light source (5) fixing component is provided in the middle of the light-transmitting conveyor belt (4), and the detection light source (5) fixing component comprises a slide rail (16) fixed on a support frame, and a drawer (8) slidably connected to the slide rail (16). The detection light source (5) is fixedly mounted on the bottom plate of the drawer (8), and reflective paper (6) is attached to the bottom plate and the inner wall thereof. A control knob (7) for the detection light source (5) is provided on the outer surface of the drawer (8).

6. The movable artificial light inspection rack for plastic bottle blanks according to claim 1, characterized in that: A guide device is provided above the light-transmitting conveyor belt (4), the guide device comprising a guide plate and a height limiting plate (18) arranged vertically symmetrically, the height limiting plate (18) being arranged at the top of the guide plate close to one end of the receiving plate (1), the guide plate comprising an integrally formed arc-shaped guide plate (17) and a main guide plate (19) arranged between the arc-shaped guide plates (17), the main guide plate (19) being tangentially connected to the arc-shaped guide plates (17), and the space between the main guide plates (19) forming a detection channel for the preforms to enter the light-transmitting conveyor belt (4).

7. The movable manual light inspection rack for plastic bottle blanks according to claim 6, characterized in that: The width of the height limiting plate (18) is consistent with the distance between the guide plates, and one end of the height limiting plate (18) close to the material receiving plate (1) is provided with an upward arc-shaped free end.

8. The movable artificial light inspection rack for plastic bottle blanks according to claim 6, characterized in that: The artificial light inspection frame also includes a magnifying glass (20) arranged on the support frame, and the magnifying glass (20) is located above the light-transmitting conveyor belt (4).

9. The movable artificial light inspection stand for plastic bottle blanks according to claim 1, characterized in that: A support frame (14) for placing a waste collection bag (13) is provided on the side of the support frame below the light-transmitting conveyor belt (4), and a movable buckle (15) for fixing the waste collection bag (13) is provided on the support frame (14).

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