Injection molded part inspection apparatus

Abstract

The application relates to an injection molding part detection device and relates to the product detection technical field. The device comprises a machine table, a detection device arranged on the machine table, a rotating table, a conveying table, a detection mechanism, a driving mechanism and the like. The rotating table is in a circular ring shape, the conveying table is made of transparent material and rotates with the rotating table, the detection mechanism comprises a visual detection module, the driving mechanism is composed of a driving gear ring, a center rotating shaft, a flower gear and the like, and a discharging mechanism and a time control mechanism are further arranged, and a feeding box, a vibrating disc and a machine shell are further arranged on the machine table. The application can effectively realize the automatic detection of injection molding parts, the detection process is stable and reliable through the cooperation of various mechanisms, the detection efficiency and accuracy are improved, and the device has the effects of protection, convenient maintenance observation and the like.

Description

Technical Field

[0001] This application relates to the field of product testing technology, and in particular to a testing device for injection molded parts. Background Technology

[0002] In the field of industrial automation inspection, the detection of appearance defects in injection molded parts (such as cracks, deformation, and missing material) typically relies on vision inspection systems. However, existing technologies generally suffer from reduced detection accuracy due to vibration interference when performing online inspection of injection molded parts in continuous motion. Specifically:

[0003] I. The inherent contradictions of dynamic detection

[0004] Visual inspection systems typically require the object being inspected to remain relatively stationary at the moment of image acquisition (i.e., meeting the "static condition") to ensure clear imaging. However, in industrial production line scenarios, injection-molded parts are usually in continuous motion via conveyor belts or rotary tables, causing relative displacement between the camera and the object being inspected, resulting in motion blur in the acquired image. For example, when the conveyor belt is running at a speed of 0.5 m / s, if the camera exposure time is 10 ms, theoretically, a 5 mm motion blur will be generated, which is sufficient to cover up minute crack defects smaller than 1 mm.

[0005] II. The Influence of Vibration Superposition Effect

[0006] In actual testing environments, vibration sources are widely present:

[0007] 1. Vibration of the object under test: During the transportation process, the injection molded part will experience irregular shaking due to mechanical transmission (such as motor vibration, gear meshing impact), resulting in a complex nonlinear change in its displacement trajectory. For example, the angular acceleration fluctuation of the rotary table during the start-up and shutdown process may cause radial vibration of ±0.5mm, which will "smear" the originally clear edge features into a 2-3mm wide blurry band in the image.

[0008] 2. Vibration of the testing device: Uneven tension of the conveyor belt, straightness error of the guide rail, and other factors can cause vibration of the testing platform itself. For example, when the camera bracket experiences high-frequency vibration with an amplitude of 0.1mm, it may cause a deviation of 0.3mm in the measuring aperture, resulting in qualified products being mistakenly judged as unqualified.

[0009] III. Limitations of Existing Solutions

[0010] To address the above problems, existing technologies mainly employ the following strategies:

[0011] 1. Improve the dynamic response capability of the sensor: For example, use a high-speed camera or shorten the exposure time, but such equipment is expensive and has extremely high requirements for light source brightness, which increases the complexity of the system and energy consumption.

[0012] 2. Dynamic Compensation Algorithm: This method monitors vibration data in real time by installing accelerometers and combines this with image processing algorithms for motion compensation. However, this approach suffers from data synchronization delays and has limited effectiveness in compensating for complex vibration modes, especially when the vibration frequency exceeds 100Hz, where the algorithm's processing power significantly decreases. Summary of the Invention

[0013] To address the aforementioned problems, this application provides an injection molded part inspection device.

[0014] An injection molded part inspection device includes a machine base, and an inspection device is provided on the machine base. The inspection device includes:

[0015] The rotary table is annular in shape and has a drive hole inside, the inner diameter of which is adapted to the outer diameter of the drive gear ring;

[0016] The conveyor table is made of transparent material and is mounted on a rotating platform by a column and rotates synchronously with it. The conveyor table has several mounting slots evenly distributed along the circumference, which are used to place the injection molded parts to be tested.

[0017] The inspection mechanism includes a vision inspection module installed on the machine platform, and the conveyor table passes through the inspection area directly below the vision inspection module along a circular path;

[0018] The drive mechanism includes a drive gear ring, a central rotating shaft, and a spline gear installed in a drive hole. The drive gear ring and the spline gear are coaxially fixed on the central rotating shaft and can rotate around the axis of the central rotating shaft.

[0019] The inner surface of the drive gear ring is provided with a plurality of drive tooth grooves, the number of drive tooth grooves being the same as the number of mounting grooves and corresponding one-to-one;

[0020] The driving mechanism also includes a toggle gear, which has only one driving tooth on its outer periphery. The driving tooth meshes with a driving tooth groove. Each rotation of the toggle gear drives the driving tooth groove to advance one tooth pitch.

[0021] The drive gear ring is provided with a plurality of first limiting arc surfaces, each of which is connected to the tooth tip of two adjacent drive gear slots.

[0022] The spline is placed inside the drive gear ring, and several splines are provided on its outer circumference. Each spline has a second limiting arc surface at the tooth tip. The first and second limiting arc surfaces maintain rolling contact with the non-meshing arc surface of the gear during the rotation of the drive gear ring.

[0023] By adopting the above technical solution, the injection molded part is placed in the mounting slot of the conveyor table and uses the rotary table and drive mechanism to achieve circumferential motion. The conveyor table drives the injection molded part along the circular path through the detection area directly below the vision inspection module for appearance defect detection. At the same time, the structural design of the drive mechanism ensures the accuracy and stability of the conveyor table rotation, avoids vibration interference, improves detection accuracy, and solves the problem of decreased detection accuracy due to vibration in the existing technology during dynamic detection.

[0024] Preferably, the cross-section of the conveyor table is stepped, forming a high platform and a low platform. The mounting groove is opened on the high platform. The detection device also includes at least two sets of buffer components. Each set of buffer components includes a bracket and a damping wheel assembly. The damping wheel assembly includes an upper damping wheel and a lower damping wheel that are spaced apart and can rotate freely. The low platform of the conveyor table passes between the upper and lower damping wheels and forms a rolling friction pair. The damping wheel assembly applies a preset clamping force to the conveyor table to suppress its vertical vibration.

[0025] By adopting the above technical solution, the stepped design of the conveyor allows the mounting groove to be located on the high platform, which facilitates the placement of the injection molded part to be tested; the damping wheel group of the buffer component applies a preset clamping force to the low platform of the conveyor and forms a rolling friction pair, which can suppress the vertical vibration of the conveyor, reduce image blurring and detection errors caused by vibration, and improve detection accuracy.

[0026] Preferably, the feeding mechanism includes a plurality of purge nozzles, which are mounted on the machine platform via adjustable brackets. The air outlet direction of the purge nozzles is at a preset angle to the radial direction of the conveyor platform, and the air outlet blows air from the inside to the outside of the conveyor platform to form a radial blowing force on the workpiece to be tested.

[0027] By adopting the above technical solution, air is blown from the inside to the outside of the conveyor table using the purge nozzle, which can generate a radial blowing force on the part to be tested, thereby realizing the function of injection molding part unloading. At the same time, the adjustable bracket can easily adjust the position and angle of the purge nozzle to ensure the unloading effect.

[0028] Preferably, one end of the support arm is fixed to the machine base, and the other end extends above the conveyor table and fixes the vision inspection module. The support arm is equipped with at least two light sources and at least one laser ranging sensor via a connecting rod. The optical axis of the vision inspection module is perpendicular to the top surface of the conveyor table, and the detection axes of the light sources and the laser ranging sensor intersect at the center of the field of view of the vision inspection module.

[0029] By adopting the above technical solution, fixing the vision inspection module to one end of the support arm that extends above the conveyor table, and making its optical axis perpendicular to the top surface of the conveyor table, ensures that the vision inspection module can acquire images of the injection molded parts on the conveyor table vertically downwards, which helps to obtain clear and accurate images. Installing at least two light sources and at least one laser rangefinder sensor on the support arm through connecting rods, and making their detection axes intersect at the center of the vision inspection module's field of view, can provide suitable lighting conditions for the vision inspection module's image acquisition, while allowing the laser rangefinder sensor to accurately obtain distance data at the center of the field of view, reducing detection errors and improving detection accuracy.

[0030] Preferably, the detection device further includes a timing control mechanism, the timing control mechanism comprising:

[0031] The photo-taking component, including a light source and a photosensitive element, is used to trigger the photo-taking action of the visual detection module;

[0032] The laser signal acquisition timing component, including a guide block, a lever, and a relay, is used to control the data acquisition timing of the laser rangefinder sensor.

[0033] By adopting the above technical solution and setting up a timing control mechanism, the visual inspection module is triggered to take pictures by the light source and photosensitive element of the timing component, and the laser signal is used to intercept the guide block, lever and relay of the timing component to control the data acquisition time of the laser range sensor. This can accurately determine the time point of the visual inspection module taking pictures and the laser range sensor acquiring data, improve the detection accuracy and efficiency of the injection molding part inspection equipment, and avoid detection errors caused by inaccurate timing.

[0034] Preferably, the end face of the sprocket has several placement slots evenly distributed in a ring around the central rotating shaft. Each placement slot has a corresponding illumination lamp installed in it. The photosensitive element is fixedly installed on the machine base and located on the rotation path of the lamp source. The illumination lamp periodically illuminates the photosensitive element as the sprocket rotates to generate a photo-taking trigger signal.

[0035] By adopting the above technical solution, the rotation of the spline gear drives the illumination lamp to periodically illuminate the photosensitive element, generating a photo-taking trigger signal to control the photo-taking action of the vision inspection module. This achieves precise control over the photo-taking time of the injection molded part, avoids imaging problems caused by vibration interference and dynamic detection, improves detection accuracy, and eliminates the need for high-cost high-speed cameras or complex dynamic compensation algorithms, thus reducing system complexity and energy consumption.

[0036] Preferably, a plurality of guide blocks are provided on the outer circumferential surface of the drive gear ring. The number of guide blocks is the same as that of the drive gear groove and they are arranged adjacent to each other in a one-to-one correspondence. The paddle is fixed on the machine base and located on the rotation path of the guide blocks. The relay is electrically connected to the paddle. When the guide block rotates with the drive gear ring to the paddle position, the paddle triggers the relay to control the data acquisition of the laser rangefinder sensor.

[0037] By adopting the above technical solution, setting the guide block and the lever and their corresponding positional relationship, and cooperating with the relay to control the data acquisition of the laser rangefinder sensor, the data acquisition can be synchronized with the rotation of the drive gear ring, accurately acquiring the data required for detection, avoiding the data synchronization delay problem, and improving the detection accuracy.

[0038] Preferably, the machine platform is also equipped with a feeding box and a vibrating plate, the bottom of the feeding box is provided with a discharge port, and the discharge port is connected to the inlet of the vibrating plate.

[0039] By adopting the above technical solution, a feeding box and a vibratory feeder are set on the machine, and the discharge port at the bottom of the feeding box is connected to the inlet of the vibratory feeder. This enables the automatic feeding of injection molded parts to be tested, making it convenient to send a large number of injection molded parts from the feeding box to the vibratory feeder for subsequent processing and improving testing efficiency.

[0040] Preferably, the vibratory feeder includes a spirally rising feeding track, the outlet end of which is close to the mounting slot of the conveyor table, a feeding cylinder is installed at the outlet end of the feeding track, and a picking head adapted to the test piece is provided at the piston rod end of the feeding cylinder. The picking head transfers the test piece from the vibratory feeder to the mounting slot of the conveyor table under the drive of the cylinder.

[0041] By adopting the above technical solution, a feeding box and a vibratory feeder are set on the machine. The discharge port of the feeding box is connected to the inlet of the vibratory feeder. The discharge end of the feeding track of the vibratory feeder is close to the mounting slot of the conveyor table and is equipped with a feeding cylinder. The picking head at the end of the piston rod of the cylinder can transfer the part to be tested from the vibratory feeder to the mounting slot of the conveyor table under the drive of the cylinder, realizing the automatic feeding of the injection molded part to be tested and improving the testing efficiency.

[0042] Preferably, the machine base is also provided with a housing, which covers the outside of the detection device. The housing is provided with an openable maintenance door and an observation window, and the observation window is made of transparent protective material.

[0043] By adopting the above technical solutions, the casing covering the detection device can prevent external dust, debris and other contaminants from entering the detection device, thus avoiding contamination and damage; the maintenance door facilitates maintenance and repair of the detection device by staff; and the observation window made of transparent protective material allows staff to observe the operation of the detection device at any time.

[0044] In summary, this application includes at least one of the following beneficial technical effects:

[0045] 1. The conveyor table is precisely controlled by the drive mechanism to keep the injection molded part under test relatively stationary at the moment of image acquisition, thus avoiding motion blur caused by relative displacement and improving detection accuracy;

[0046] 2. The first and second limiting arc surfaces roll into contact with the non-meshing arc surface of the gear, ensuring smooth rotation of the drive gear ring and reducing the interference of vibration on the detection.

[0047] 3. The conveyor table and the drive gear ring work together to achieve orderly conveying and testing of the injection molded parts to be tested, optimizing the entire testing process and improving testing efficiency. Attached Figure Description

[0048] Figure 1 This is a front view of an embodiment of this application;

[0049] Figure 2 This is a perspective view of an embodiment of this application;

[0050] Figure 3 This is a 3D view of the device behind the concealed casing;

[0051] Figure 4 It is a three-dimensional view of the specific structure of the detection device;

[0052] Figure 5 and Figure 8 This is a magnified view of a portion of the purge nozzle structure;

[0053] Figure 6 and Figure 7 It is a magnified view of a portion of the structure of the testing facility;

[0054] Figure 9 This is a magnified view of the specific structure of the material loading track;

[0055] Figure 10 and Figure 14 It is a three-dimensional view of the specific structure of the drive mechanism;

[0056] Figure 11 It is a magnified view of the meshing relationship between the drive gear ring and the actuating gear;

[0057] Figure 12 It is a magnified view of the meshing relationship between the drive gear ring and the spline gear;

[0058] Figure 13 This is a cross-sectional view of the structure of the camera capture component.

[0059] Explanation of reference numerals in the attached drawings: 10. Machine base; 101. Feeding box; 102. Vibratory feeder; 1021. Feeding track; 1022. Feeding cylinder; 11. Rotary table; 111. Conveyor table; 112. Mounting slot; 121. Vision inspection module; 122. Support arm; 123. Connecting rod; 124. Illumination lamp; 125. Laser rangefinder sensor; 131. Drive gear ring; 132. Drive gear groove; 133. First limit switch 134. Curved surface; 135. Actuating gear; 136. Driving gear; 137. Central shaft; 138. Spindle gear; 149. Placement slot; 150. Purge nozzle; 151. Light source; 152. Photosensitive element; 153. Guide block; 154. Paddle; 155. Relay; 103. Bracket; 1031. Upper damping wheel; 1032. Lower damping wheel; 104. Housing; 1041. Inspection door; 1042. Observation window. Detailed Implementation

[0060] The present application will be further described in detail below with reference to the accompanying drawings.

[0061] In the description of the invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the invention.

[0062] This application mainly adopts a rotary drive conveyor table to sequentially inspect injection molded parts, which achieves the effect of reducing vibration interference and improving the accuracy of appearance defect detection of injection molded parts. The following is a further detailed description of this application.

[0063] In practical applications, the injection molding part testing equipment provided in this application uses components that work together to achieve an efficient and accurate testing process.

[0064] Reference Figure 1 , Figure 2 , Figure 3 and Figure 9 The feeding box 101 and vibratory feeder on the machine 10 constitute an automatic feeding system. The injection molded part to be tested is first placed in the feeding box 101 and falls into the vibratory feeder through the bottom outlet. The vibratory feeder, with its unique vibration frequency and spiraling feeding track 1021, transports the injection molded parts one by one to the track outlet end in an orderly manner. Under the command of the control system, the feeding cylinder 1022 at the outlet end uses the pusher head at the end of its piston rod to accurately grab the injection molded part. The shape of the pusher head is adapted to the injection molded part to be tested to ensure a stable grip. Subsequently, the feeding cylinder 1022 actuates, accurately placing the injection molded part into the mounting slot 112 of the conveyor table 111.

[0065] Reference Figure 4 , Figure 10 and Figure 12 The rotary table 11 and the conveyor table 111 are rigidly connected by a column, and a drive mechanism provides power to them. Specifically, the actuating gear 134 in the drive mechanism is driven by a servo motor, and the speed and direction of the motor can be precisely adjusted by the control system. The driving teeth 135 on the outer periphery of the actuating gear 134 mesh with the driving tooth grooves 132 on the inner surface of the driving gear ring 131. When the actuating gear 134 rotates one revolution, the driving teeth 135 push the driving tooth grooves 132 forward by one tooth pitch. Since the number of driving tooth grooves 132 is the same as the number of mounting slots 112 on the conveyor table 111 and they correspond one-to-one, this allows the conveyor table 111 to rotate one mounting slot 112 interval at a time. During the rotation of the drive gear ring 131, the first limiting arc surface 133 on it plays a role in the non-meshing stage of the actuating gear 134, contacting the non-meshing arc surface of the actuating gear 134 and restricting the position of the drive gear ring 131; at the same time, the second limiting arc surface on the outer spline of the spline gear 137 also maintains rolling contact with the non-meshing arc surface of the actuating gear 134. The two work together to ensure the stability and positioning accuracy of the rotation of the conveyor table 111.

[0066] Reference Figure 4 , Figure 5 and Figure 6 The conveyor table 111 is made of transparent acrylic material. The mounting groove 112 on its raised surface is designed as a corresponding groove or protrusion structure according to the shape of the injection molded part, ensuring that the injection molded part will not shift or shake after being placed. When the conveyor table 111 rotates and moves the injection molded part along the circular path to directly below the vision inspection module 121, it enters the inspection process.

[0067] Reference Figure 7 In the detection mechanism of this application embodiment, the vision inspection module 121 is equipped with a high-pixel industrial camera and a telecentric lens, the focal length of which is adjusted according to the size of the injection molded part. The three LED light sources 151 mounted on the support arm 122, together with the optical axis of the vision inspection module 121 and the detection axis of the laser range sensor 125, converge on the inspection surface of the injection molded part.

[0068] Reference Figure 5 The support 103 of the buffer assembly is fixed to the machine base 10 by bolts. In this embodiment, the upper damping wheel 1031 and the lower damping wheel 1032 of the damping wheel assembly are made of nitrile rubber with a Shore hardness of 60. The distance between them is controlled by adjusting bolts to apply a clamping force of 5-10N to the lower surface of the conveyor table 111, effectively suppressing the vibration of the conveyor table 111 in the vertical direction.

[0069] Reference Figure 8The blowing nozzle 141 of the unloading mechanism is installed inside the machine base 10 via an adjustable bracket 103. The air outlet direction is arranged at an angle to the radial direction of the conveyor table 111, and the nozzle is connected to a compressed air source. When the injection molded part completes the inspection and rotates to the unloading position with the conveyor table 111, the nozzle blows air, and the resulting radial blowing force blows the injection molded part away from the conveyor table 111 and into the collection box below.

[0070] Reference Figure 10 , Figure 11 , Figure 12 , Figure 13 and Figure 14 The timing control mechanism enables precise detection timing control. The illumination lamp 124 on the end face of the spline gear 137 rotates with the spline gear 137. When the illumination lamp 124 passes the photosensitive element 152 fixed on the machine base 10, it triggers the vision inspection module 121 to take a picture. The guide block 153 on the outer periphery of the drive gear ring 131 rotates with the drive gear ring 131. When the guide block 153 touches the paddle 154 fixed on the machine base 10, the paddle 154 triggers the relay 155, controlling the laser range sensor 125 to collect data, ensuring that image acquisition and distance measurement are performed at the optimal moment when the injection molded part is completely stationary.

[0071] The housing 104 is made of sheet metal, and its inspection door 1041 is connected by hinges. The observation window 1042 is made of polycarbonate transparent plate, which can protect the detection device from external interference and facilitate operation and monitoring by staff.

[0072] The implementation principle of this application embodiment is as follows: The implementation principle of this injection molded part testing equipment is based on intermittent static testing and multi-dimensional vibration suppression strategy.

[0073] In terms of motion control, the unique meshing design of the drive mechanism's actuating gear 134 and drive gear ring 131 transforms continuous rotary motion into intermittent motion. Each rotation of the actuating gear 134 advances the conveyor table 111 one station, causing the injection molded part to briefly come to a stop below the vision inspection module 121, meeting the "static conditions" required for vision inspection. The limiting effect of the first and second limiting arc surfaces during the non-drive phase, combined with the damping components' suppression of vertical vibration of the conveyor table 111, greatly reduces vibration interference during motion, avoiding image blurring and measurement deviations.

[0074] In terms of timing control, the timing control mechanism uses a combination of mechanical triggering and photoelectric sensing to precisely synchronize the detection actions. When the drive tooth 135 inserts into the drive tooth groove 132 and moves the drive gear ring 131 one tooth groove 132 distance, as the drive gear 134 continues to rotate 180 degrees, the drive tooth 135 will engage with the groove on the sprocket 137 and move the sprocket 137 one tooth groove distance. This process is the same as the rotation principle of the drive gear ring 131. The rotation of the sprocket 137 aligns the illumination lamp 124 on the sprocket 137 with the photosensitive element 152. After the photosensitive element 152 senses the beam of light from the illumination lamp 124, it will generate a timing signal to control the visual inspection module 121 to take pictures. This allows the visual inspection module 121 to take a new picture every time a new injection molded part passes under it, achieving precise picture triggering of the visual inspection module 121.

[0075] The linkage between the guide block 153 on the drive gear ring 131, the paddle 154, and the relay 155 ensures that after the drive gear ring 131 is initially driven to rotate by the drive paddle 135, the paddle 154 contacts the guide block 153, and the relay 155 generates an electrical signal. This signal corrects the laser rangefinder 125, enabling it to adjust its operating time based on the signal. This allows the laser rangefinder 125 to detect the position of newly transported injection molded parts, ensuring that the injection molded parts are stationary and that the laser rangefinder 125 collects data at the optimal time, thus guaranteeing the accuracy of image and distance data.

[0076] In terms of process coordination, the automatic feeding system, the inspection system, and the unloading system work closely together. The vibratory feeder and the feeding cylinder 1022 enable the orderly feeding of injection molded parts; the vision inspection module 121 and the laser rangefinder 125 complete the inspection of appearance defects and dimensional accuracy; the blow nozzle 141 enables automatic unloading. Each link is interconnected, forming a highly efficient automated inspection process, ultimately achieving high-precision and high-efficiency inspection of injection molded parts.

[0077] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An injection molded part testing device, characterized in that, Includes a machine base (10), on which a detection device is provided, the detection device comprising: The rotating table (11) is in the shape of a ring and has a drive hole inside, the inner diameter of which is adapted to the outer diameter of the drive gear ring (131). The conveyor table (111) is made of transparent material and is mounted on the rotating table (11) by a column and rotates synchronously with it. The conveyor table (111) has several mounting slots (112) evenly distributed along the circumference. The mounting slots (112) are used to place the injection molded parts to be tested. The inspection mechanism includes a vision inspection module (121) installed on a machine (10), and the conveyor (111) passes through the inspection area directly below the vision inspection module (121) along a circular path; The drive mechanism includes a drive gear ring (131), a central rotating shaft (136), and a spline gear (137) installed in the drive hole. The drive gear ring (131) and the spline gear (137) are coaxially fixed on the central rotating shaft (136) and can rotate around the axis of the central rotating shaft (136). The inner surface of the drive gear ring (131) is provided with a plurality of drive tooth grooves (132), the number of drive tooth grooves (132) being the same as the number of mounting grooves (112) and corresponding one-to-one; The driving mechanism also includes a toggle gear (134), and the outer periphery of the toggle gear (134) is provided with only one driving tooth (135). The driving tooth (135) meshes with the driving tooth groove (132). The toggle gear (134) drives the driving tooth groove (132) to advance by one tooth pitch for each rotation. The drive gear ring (131) is provided with a plurality of first limiting arc surfaces (133), and each first limiting arc surface (133) is connected to the tooth tip of two adjacent drive gear grooves (132); The spline (137) is placed inside the drive gear ring (131), and a number of splines are provided on its outer periphery. Each spline has a second limiting arc surface (1371) at the tooth tip. The first limiting arc surface (133) and the second limiting arc surface (1371) maintain rolling contact with the non-meshing arc surface of the drive gear (134) during the rotation of the drive gear ring (131).

2. The injection molded part testing equipment according to claim 1, characterized in that, The conveying platform (111) has a stepped cross-section forming a high platform and a low platform. The mounting groove (112) is opened on the high platform. The detection device also includes at least two sets of buffer components. Each set of buffer components includes a bracket (103) and a damping wheel set. The damping wheel set includes an upper damping wheel (1031) and a lower damping wheel (1032) that are spaced apart and can rotate freely. The low platform of the conveying platform (111) passes between the upper and lower damping wheels (1032) and forms a rolling friction pair. The damping wheel set applies a preset clamping force to the conveying platform (111) to suppress its vertical vibration.

3. The injection molded part testing equipment according to claim 1, characterized in that, The feeding mechanism includes several purge nozzles (141). The purge nozzles (141) are mounted on the machine base (10) via an adjustable bracket (103). The air outlet direction of the purge nozzles (141) is at a preset angle to the radial direction of the conveyor table (111). The air outlet blows air from the inside to the outside of the conveyor table (111) to form a radial blowing force on the workpiece to be tested.

4. The injection molded part testing equipment according to claim 1, characterized in that, A support arm (122) is fixed on the machine base (10). One end of the support arm (122) is fixed to the machine base (10), and the other end extends above the conveyor table (111) and fixes the vision inspection module (121). The support arm (122) is equipped with at least two light sources (151) and at least one laser range sensor (125) through a connecting rod (123). The optical axis of the vision inspection module (121) is perpendicular to the top surface of the conveyor table (111). The detection axes of the light sources (151) and the laser range sensor (125) intersect at the center of the field of view of the vision inspection module (121).

5. The injection molded part testing equipment according to claim 1, characterized in that, The detection device further includes a timing control mechanism, which comprises: The photo-taking component includes an illumination lamp (124) and a photosensitive element (152) for triggering the photo-taking action of the visual detection module (121); The laser signal acquisition timing component includes a guide block (153), a lever (154), and a relay (155) for controlling the data acquisition timing of the laser rangefinder (125).

6. The injection molded part testing equipment according to claim 5, characterized in that, The end face of the sprocket (137) is provided with several placement slots (138) evenly distributed in a ring with the central rotating shaft (136) as the center. Each placement slot (138) is equipped with an illumination lamp (124). The photosensitive element (152) is fixedly installed on the machine base (10) and located on the rotation path of the lamp source (151). The illumination lamp (124) periodically illuminates the photosensitive element (152) as the sprocket (137) rotates to generate a photo-taking trigger signal.

7. The injection molded part testing equipment according to claim 5, characterized in that, Multiple guide blocks (153) are provided on the outer circumferential surface of the drive gear ring (131). The number of guide blocks (153) is the same as that of the drive gear groove (132) and they are arranged adjacent to each other. The paddle (154) is fixed on the machine base (10) and located on the rotation path of the guide block (153). The relay (155) is electrically connected to the paddle (154). When the guide block (153) rotates with the drive gear ring (131) to the position of the paddle (154), the paddle (154) triggers the relay (155) to act in order to control the data acquisition of the laser rangefinder sensor (125).

8. The injection molded part testing equipment according to claim 1, characterized in that, The machine base (10) is also equipped with a feeding box (101) and a vibrating plate. The bottom of the feeding box (101) is provided with a discharge port, which is connected to the inlet of the vibrating plate.

9. The injection molded part testing equipment according to claim 8, characterized in that, The vibratory feeder includes a spirally rising feeding track (1021). The outlet end of the feeding track (1021) is close to the mounting groove (112) of the conveyor table (111). A feeding cylinder (1022) is installed at the outlet end of the feeding track (1021). The piston rod end of the feeding cylinder (1022) is provided with a picking head adapted to the test piece. The picking head transfers the test piece from the vibratory feeder to the mounting groove (112) of the conveyor table (111) under the drive of the cylinder.

10. The injection molded part testing equipment according to claim 1, characterized in that: The machine base (10) is also provided with a housing (104), which covers the outside of the detection device. The housing (104) is provided with an openable maintenance door (1041) and an observation window (1042), which is made of transparent protective material.

Images