System for detecting smoothness of paint surface of sprayed injection molding shell

Abstract

The invention relates to the technical field of injection molding shell detection, in particular to a detection system for paint surface flatness after injection molding shell spraying, which comprises a detection table, a detection cavity is formed in the top end of the detection table and penetrates through the bottom end, a building opening is formed in one side of the detection table and penetrates through the detection cavity, and side plates are fixedly mounted on two opposite inner side walls of the building opening. In the whole detection process, the injection molding shell does not need to be fixed, the upper surface of the injection molding shell is subjected to air draft cleaning through the cleaning assembly in an air draft mode, dust and impurities on the surface of the injection molding shell are filtered and collected through the filter screen, and high-speed air penetrating through meshes of the filter screen is collected through the exhaust pipe; and a spray head arranged below the rotating roller is used for blowing the lower surface of the injection molding shell, and the lower surface of the injection molding shell is cleaned.

Description

Technical Field

[0001] The invention relates to the technical field of injection molded shell part detection, and in particular to a detection system for the smoothness of a paint surface of an injection molded shell part after spraying. Background Art

[0002] Injection molded shell parts need to be surface painted during processing, and after painting they need to be inspected by relevant testing equipment.

[0003] The Chinese invention patent with application publication number "CN115290011A" is specifically "a detection device for detecting the flatness of the paint surface of a mobile phone shell after spraying". It fixes the painted mobile phone shell by means of a suction cup, and works through a line transmitter to emit an infrared beam to the direction of a light receiver. After receiving the infrared beam, the light receiver can sense and detect the flatness of the paint surface of the mobile phone shell;

[0004] However, it was found in actual use that before inspecting the mobile phone case, a series of operation steps are required, such as grabbing, squeezing, and adsorption to fix the mobile phone case. Only after fixing a single mobile phone case can the optical fiber transceiver be used to detect the flatness of the paint surface of the mobile phone case. After the inspection is completed, it is necessary to first release the fixation of the mobile phone case and then manually remove the mobile phone case from the inspection station. Due to too many operation steps, there is a problem of low detection efficiency, and it is not suitable for large-scale injection molded case paint surface inspection. In addition, the above-mentioned device does not clean the dust and impurities on the surface of the mobile phone case before inspecting the mobile phone case, which may easily cause the mobile phone case whose paint surface flatness meets the standard to bulge due to dust and impurities, resulting in detection errors and reducing the accuracy of the detection results. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a system for detecting the smoothness of the paint surface of an injection molded shell after spraying, which can effectively solve the problem of the inconvenience of using the prior art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The present invention provides a system for detecting the flatness of the paint surface of an injection molded shell after spraying, comprising a detection platform, a detection cavity is formed through the top of the detection platform and the bottom, a construction opening is formed through the detection cavity on one side of the detection platform, side plates are fixedly installed on two opposite inner side walls of the construction opening, a plurality of rotating rollers for conveying the injection molded shell are rotatably installed between the two sides of the two side plates, and further comprising:

[0008] A lifting assembly, including a detection plate that is lifted and slidably installed in the detection cavity;

[0009] A cleaning assembly, comprising a cleaning box fixedly mounted on the top ends of two side panels, wherein a suction port is provided at the bottom of the cleaning box and is opposite to the top end of the injection molded shell;

[0010] The detection component comprises an infrared transmitter and an infrared receiver which are arranged at the upper cavity opening of the detection cavity and can be telescoped and slid synchronously. The infrared transmitter and the infrared receiver are arranged in relative positions.

[0011] A lifting cylinder is provided under the detection platform, and the lifting cylinder realizes the lifting and lowering adjustment of the height of the detection plate; a driving motor is fixedly installed on the outer wall of one of the side panels, and the driving motor realizes the smooth transportation of the injection molded shell; two L-shaped baffles are fixedly installed in the cleaning box, and the airflow direction in the cleaning box is changed by the L-shaped baffles; a detachable filter is provided on the outer wall of the cleaning box, and the filter is detachable, which is convenient for regular removal and cleaning of the collected dust and impurities.

[0012] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects:

[0013] An inspection platform with an inspection cavity is provided, and an inspection plate capable of lifting and sliding is provided in the inspection cavity, and a plurality of rotating rollers are rotatably provided for conveying the injection molded shell parts to the inspection plate, and the inspection plate is lifted and lowered to facilitate the removal of the inspected shell parts from the inspection platform, and the first unloading component or the second unloading component is used to classify and discharge the injection molded shell parts according to different inspection results, and the injection molded shell parts do not need to be fixed during the entire inspection process, and can realize automatic loading and unloading of the injection molded shell parts, and classified unloading according to different inspection results has high inspection efficiency and is suitable for large-scale injection molding. Used for testing the flatness of the paint surface of plastic shell parts; in the process of transporting injection molded shell parts by several rotating rollers, the upper surface of the injection molded shell parts is cleaned by exhaust air through the cleaning component, and the dust and impurities on the surface of the injection molded shell parts are collected by filtering through the filter net, and the high-speed air passing through the mesh of the filter net is collected by the exhaust pipe, and the lower surface of the injection molded shell parts is sprayed with a nozzle arranged under the rotating roller to clean the lower surface of the injection molded shell parts, thereby avoiding errors in the paint surface flatness detection due to dust and impurities sticking to the injection molded shell parts and improving the accuracy of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a schematic diagram of the overall first-viewing angle structure of the present invention.

[0016] Figure 2 It is a schematic diagram of the overall second viewing angle structure of the present invention.

[0017] Figure 3 It is a schematic diagram of the cleaning component structure of the present invention.

[0018] Figure 4 This is a schematic diagram of the installation structure of the detection component of the present invention.

[0019] Figure 5 It is a schematic diagram of the structure of the detection component of the present invention.

[0020] Figure 6 It is a schematic structural diagram of the first blanking assembly and the second blanking assembly of the present invention.

[0021] Figure 7 It is a schematic diagram of the detection system flow of the present invention.

[0022] The numbers in the figure represent:

[0023] 1. Inspection table; 11. Inspection chamber; 12. Lifting cylinder; 13. Lifting rod; 14. Inspection plate; 15. Rolling ball; 16. Unloading ramp; 17. Slide;

[0024] 2. Side plate; 21. Rotating roller; 22. Driving motor; 23. First supporting frame;

[0025] 3. Cleaning box; 31. L-shaped baffle; 32. Fan; 33. Filter; 34. Exhaust pipe; 35. Sprinkler;

[0026] 41. Mounting block; 42. Screw rod; 43. Servo motor; 44. Guide rod; 45. Nut seat; 46. Sliding sleeve; 47. Synchronous bending rod; 48. Infrared transmitter; 49. Infrared receiver;

[0027] 51. first mounting plate; 52. first pushing cylinder; 53. first pushing plate; 54. first conveyor;

[0028] 61. Second mounting plate; 62. Second pushing cylinder; 63. Second pushing plate; 64. Second conveyor. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The present invention will be further described below in conjunction with the embodiments.

[0031] Example 1

[0032] Reference Figure 1-6 , which is the first embodiment of the present invention, a system for detecting the smoothness of the paint surface of an injection molded shell after spraying, comprises a detection platform 1, a control system is installed on the front of the detection platform 1, the control system comprises a sensor and an alarm, a controller is connected with the alarm, an infrared transmitter 48, an infrared receiver 49, a drive motor 22, a fan 32, a lifting cylinder 12, a servo motor 43, a first push cylinder 52 and a second push cylinder 62, the controller controls the driving of the drive motor 22 to realize the synchronous rotation of a plurality of rotating rollers 21, and then realizes the conveying of the injection molded shell, the controller controls the fan 32 to extract dust and impurities on the upper surface of the injection molded shell, and discharges the filtered air through the nozzle 35 to spray and clean the lower surface of the injection molded shell, and the controller controls the lifting cylinder 12 to drive the lifting of the detection plate 14, so as to facilitate the adjustment of the working state of the detection plate 14, that is, the detection state of the injection molded shell and the injection molded shell are detected. In the unloading state of the plastic shell parts, the controller controls the servo motor 43 to drive the infrared transmitter 48 and the infrared receiver 49 to realize the synchronous movement, and the paint surface flatness of the upper surface of the injection molded shell parts is detected. If the paint surface of the injection molded shell parts is uneven, the upper surface will be tilted, so it will block the infrared light beam emitted by the infrared transmitter 48. After the controller receives the feedback signal, the alarm is sounded through the alarm, and the controller controls the first push cylinder 52 to drive the qualified injection molded shell parts to the first conveyor 54, and the controller controls the second push cylinder 62 to drive the unqualified injection molded shell parts to the second conveyor 64. A detection cavity 11 is opened at the top of the detection table 1 through the bottom, and a building opening is opened on one side of the detection table 1 through the detection cavity 11, and side panels 2 are fixedly installed on the two opposite inner walls of the building opening, and a plurality of rotating rollers 21 for conveying injection molded shell parts are rotatably installed between the two side panels 2 facing each other.

[0033] The lifting component includes a detection plate 14 that is lifted and slidably installed in the detection cavity 11. The detection plate 14 is used to place the injection molded shell after spraying. By adjusting the lifting height of the detection plate 14, it is convenient to cooperate with the detection component set on the top of the detection platform 1 to realize the detection of the flatness of the paint surface of the injection molded shell. The specific detection process is that the height of the detection plate 14 is adjusted to a state where the distance from the upper cavity opening of the detection cavity 11 is kept flush with the height of the injection molded shell. If the paint surface of the injection molded shell is flat, the infrared beam emitted by the infrared transmitter 48 in the detection component will be received by the infrared receiver 49. If the paint surface of the injection molded shell is uneven, the infrared transmitter 48 will emit an infrared beam. The emitted infrared beam will be blocked by the protruding paint surface on the surface of the injection molded shell, and thus cannot be received and sensed by the infrared receiver 49. A plurality of rolling balls 15 distributed in a rectangular array are embedded and rolled on the top of the detection plate 14 to reduce friction and reduce wear of the injection molded shell, thereby avoiding scratches that affect product quality. The cleaning component includes a cleaning box 3 fixedly mounted on the top of the two side panels 2, and a suction port opposite to the top of the injection molded shell is provided at the bottom of the cleaning box 3. Two fans 32 are arranged in the cleaning box 3, and a filter screen 33 can be detachably installed between the input end and the suction port of the two fans 32, so as to facilitate regular cleaning and ensure that the cleaning is carried out properly. The filter screen 33 is always in a smooth state when working. The output ends of the two fans 32 are connected to the nozzles 35 arranged below the two adjacent rotating rollers 21. The nozzles 35 are opposite to the bottom of the injection molded shell. The detection component includes an infrared transmitter 48 and an infrared receiver 49 which are arranged at the upper cavity opening of the detection cavity 11 and are synchronously telescopically slidable. The infrared beam emitted by the infrared transmitter 48 will be received by the infrared receiver 49 under the premise that it is not blocked. The infrared transmitter 48 and the infrared receiver 49 are arranged in relative positions. The first unloading component includes a first push plate 53 which is telescopically slidably installed below the detection platform 1, and also includes a push plate 53 which is telescopically slidable with the first push plate 53. The material plate 53 is positioned opposite to the first conveyor 54, and the first push plate 53 pushes the tested injection molded shell parts on the detection plate 14 and drops them onto the first conveyor 54. The second unloading assembly includes a second push plate 63 telescopically and slidably installed under the detection platform 1, and also includes a second conveyor 64 opposite to the second push plate 63. The second push plate 63 pushes the tested injection molded shell parts on the detection plate 14 and drops them onto the second conveyor 64. The heights of the two conveyors are flush with the heights of the injection molded shell parts after they are lowered. Therefore, when the injection molded shell parts are pushed, they slide down from the several rolling balls 15 and fall directly onto the corresponding conveyors.

[0034] Example 2

[0035] Reference Figure 1-2, which is the second embodiment of the present invention. The embodiment is different from the first embodiment in that: a lifting cylinder 12 is arranged below the detection platform 1, and a lifting rod 13 is fixedly installed between the output end of the lifting cylinder 12 and the lower bottom of the detection plate 14, and a material unloading ramp 16 arranged between the rotating roller 21 and the detection plate 14 is fixedly installed in the building opening, which can avoid the problem of flipping when the injection molded shell slides down from the rotating roller 21. Two parallel slide grooves 17 are provided at the top of the detection platform 1, and a driving motor 22 is fixedly installed on the outer wall of one side plate 2. Several rotating rollers 21 extend into one end of the side plate 2 and are fixedly installed with transmission wheels. A transmission belt is connected between two adjacent transmission wheels. Except for the transmission wheels on both sides, the other transmission wheels are designed as a group of two, which is convenient for transmission with the adjacent transmission wheels on the left and right. The bottom ends of the two side plates 2 are jointly installed with a first support frame 23.

[0036] The lifting cylinder 12 is provided to realize the lifting and lowering adjustment of the height of the detection plate 14 , so that the detection plate 14 can carry the injection molded shell parts, cooperate with the detection components to complete the detection of the injection molded shell parts and quickly unload the detection plate 14 .

[0037] The remaining structures are the same as those of Example 1.

[0038] Example 3

[0039] Reference Figure 1-3 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: two L-shaped baffles 31 are fixedly installed in the cleaning box 3, the suction port is arranged between the two L-shaped baffles 31, and the two fans 32 are respectively installed at the top ends of the corresponding L-shaped baffles 31. The input ends of the two fans 32 are designed to fit the bottom of the filter 33, and the output ends of the two fans 32 are connected to the corresponding nozzles 35 through exhaust pipes 34. The outer side walls of the cleaning box 3 are provided with card slots, and the bottom of the card slots penetrates the cleaning box 3 and is provided with a through opening for convenient card connection of the filter 33. The filter 33 is designed to be concave, which can collect dust or impurities of a certain specification and reduce the scattering of dust or impurities. A card block that fits into the card slot is fixedly installed at one end of the filter 33, and a handle is installed at the end of the card block away from the cleaning box 3 to facilitate the removal of the filter 33.

[0040] The L-shaped baffle 31 is provided to change the airflow direction in the cleaning box 3, and guide the airflow to pass through from the top to the bottom of the filter 33, ensuring that the filtered dust and impurities remain on the top of the filter 33 and do not fall off.

[0041] The remaining structure is the same as that of Example 2.

[0042] Example 4

[0043] Reference Figure 1-24-5 is the fourth embodiment of the present invention, which is different from the third embodiment in that: the detection component also includes mounting blocks 41 fixedly mounted at the four corners of the top of the detection platform 1, wherein a screw rod 42 is rotatably mounted between two mounting blocks 41, and a servo motor 43 whose output end is connected to the screw rod 42 is fixedly mounted on one of the outer side walls of the two mounting blocks 41, and a guide rod 44 is fixedly mounted between the other two mounting blocks 41, a nut seat 45 is threadedly sleeved on the outer rod wall of the screw rod 42, and a sleeve 46 is slidably sleeved on the outer rod wall of the guide rod 44, a synchronous bending rod 47 is fixedly mounted between the nut seat 45 and the sleeve 46, an infrared transmitter 48 and an infrared receiver 49 are respectively mounted on the opposite sides of the nut seat 45 and the sleeve 46, and a slider adapted to be slidably mounted in the slide groove 17 is mounted at the bottom of the nut seat 45 and the sleeve 46 to ensure that the nut seat 45 and the sleeve 46 are stable and reliable during the linear reciprocating movement.

[0044] The servo motor 43 is set to drive the screw rod 42 to rotate at a uniform speed, and cooperates with the guide rod 44 to achieve smooth linear sliding of the nut seat 45 and the sleeve 46; the servo motor 43 is finally used to realize the translation of the infrared transmitter 48 and the infrared sensor on the top surface of the detection table, so as to realize a comprehensive scan of the upper surface of the injection molded shell and detect the flatness of the upper surface paint.

[0045] The remaining structure is the same as that of Example 3.

[0046] Example 5

[0047] Reference Figure 1 , 2 and 6, which is the fourth embodiment of the present invention, the first unloading assembly also includes a first mounting plate 51 fixedly mounted on the bottom of the detection platform 1, and a first pushing cylinder 52 with an output end connected to the first pushing plate 53 is fixedly mounted on the first mounting plate 51 away from the first conveyor 54. The second unloading assembly also includes a second mounting plate 61 fixedly mounted on the bottom of the detection platform 1, and a second pushing cylinder 62 with an output end connected to the second pushing plate 63 is fixedly mounted on the second mounting plate 61 away from the second conveyor 64.

[0048] For the injection-molded shell parts that pass the inspection, the first push plate 53 is pushed to complete the discharging; for the injection-molded shell parts that fail the inspection, the second push plate 63 is pushed to complete the discharging.

[0049] The remaining structures are the same as those of Example 4.

[0050] Working principle of the present invention:

[0051] In the first step, the injection molded shell is placed on the rotating roller 21 in this way, and the corresponding rotating roller 21 is driven to rotate by starting the driving motor 22, and the transmission between the transmission wheels at the ends of the rotating rollers 21 is used to realize the synchronous rotation of the other rotating rollers 21, thereby realizing the conveyance of the injection molded shell placed on the rotating roller 21;

[0052] In the second step, when the injection molded shell is transported to the suction port at the bottom of the cleaning box 3, the two fans 32 are started to suck the dust and impurities on the upper surface of the injection molded shell through the suction port, and the dust and impurities are introduced into the input end of the fan 32 through the internal air duct formed by the two L-shaped baffles 31 in the cleaning box 3. After passing through the filter 33, the sucked dust and impurities are intercepted on the upper surface of the filter 33, and the sucked air passes through the mesh of the filter 33 and is discharged into the exhaust pipe 34 by the fan 32, and is discharged through the nozzle 35. Since the nozzle 35 is arranged below the plurality of rotating rollers 21 and is opposite to the lower surface of the injection molded shell, the discharged high-speed air will be directly blown to the lower surface of the injection molded shell to clean the lower surface of the injection molded shell. The dust and impurities blown off the lower surface of the injection molded shell will fall directly if they are heavy, and will be extracted by the fan 32 above if they are light, forming a set of circulating cleaning system.

[0053] In the third step, the cleaned injection molded shell slides off the rotating roller 21 and slides into the detection chamber 11 through the unloading ramp 16. At this time, the detection plate 14 in the detection chamber 11 rises to the specified height, that is, the distance between the upper surface end point of the rolling ball 15 on the top of the detection plate 14 and the upper cavity opening of the detection chamber 11 is consistent with the thickness of the injection molded shell to be detected. At this time, the servo motor 43 is started to drive the screw 42 to rotate, so as to realize the synchronous sliding of the nut seat 45 and the sliding sleeve 46, and then synchronously drive the infrared transmitter 48 and the infrared receiver 49 to move. If the paint surface of the injection molded shell is smooth, the infrared light beam emitted by the infrared transmitter 48 will be sensed by the infrared receiver 49 and fed back to the controller in real time. If the paint surface of the injection molded shell is uneven, the infrared light beam emitted by the infrared transmitter 48 will be blocked and cannot be sensed by the infrared receiver 49. After being fed back to the controller, the alarm is started to alarm;

[0054] The fourth step is to start the lifting cylinder 12 after the detection is completed, and drive the detection plate 14 and the injection molded shell to descend in height through the lifting rod 13, and move them out from the lower cavity mouth of the detection cavity 11. At this time, according to the detection structure, the first pushing cylinder 52 or the second pushing cylinder 62 is started by the controller to push the first pushing plate 53 or the second pushing plate 63 to push out the injection molded shell placed on the detection plate 14, and drop it on the first conveyor 54 or the second conveyor 64 to realize classified unloading. Since the injection molded shell is in rolling contact with several balls 15 on the top of the detection plate 14, the rolling of the balls 15 will reduce the wear on the lower surface of the injection molded shell when it is pushed for unloading.

[0055] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A system for detecting the smoothness of the paint surface of an injection molded shell after spraying, comprising a detection platform (1), wherein the top of the detection platform (1) is provided with a detection cavity (11) penetrating through the bottom, and one side of the detection platform (1) is provided with a construction opening penetrating through the detection cavity (11), and two opposite inner side walls of the construction opening are fixedly installed with side plates (2), and a plurality of rotating rollers (21) for conveying the injection molded shell are rotatably installed between the two sides of the two side plates (2), characterized in that: Also includes: A lifting assembly, comprising a detection plate (14) which is lifted and slidably installed in the detection cavity (11); A cleaning assembly comprises a cleaning box (3) fixedly mounted on the top ends of the two side panels (2), wherein a suction port is provided at the bottom of the cleaning box (3) and is located opposite to the top of the injection-molded shell; The detection component comprises an infrared transmitter (48) and an infrared receiver (49) which are arranged at the upper cavity opening of the detection cavity (11) and are capable of synchronous telescopic sliding. The infrared transmitter (48) and the infrared receiver (49) are arranged in relative positions.

2. A system for detecting the smoothness of the paint surface of an injection molded shell after spraying according to claim 1, characterized in that: A lifting cylinder (12) is arranged below the detection platform (1), and the lifting cylinder (12) realizes the lifting and lowering adjustment of the height of the detection plate (14); a driving motor (22) is fixedly installed on the outer side wall of one of the side plates (2), and the driving motor (22) realizes the smooth transportation of the injection molded shell parts; two L-shaped baffles (31) are fixedly installed in the cleaning box (3), and the airflow direction in the cleaning box (3) is changed by the L-shaped baffles (31); a detachable filter screen (33) is arranged on the outer side wall of the cleaning box (3), and the filter screen (33) is detachable, so that the collected dust and impurities can be taken out and cleaned regularly.

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