A method and device for detecting a plastic part molding carrier

Abstract

The present invention belongs to the field of detection technology, and discloses a detection method and detection equipment for a plastic part molding carrier. The detection method for the plastic part molding carrier includes obtaining and recording a first assembly parameter of an assembly part on a plastic part molding carrier to be used for molding plastic parts, and bundling the plastic part molding carrier and the first assembly parameter; when the plastic part molding carrier completes the plastic part molding operation, obtaining a second assembly parameter of the assembly part on the plastic part molding carrier that molds a good plastic part; comparing the deviation between the second assembly parameter and the first assembly parameter of the same plastic part molding carrier, and correcting the deviation if the deviation exceeds a preset deviation range. The present invention does not set standard assembly parameters for the assembly part, but compares the first assembly parameter of the assembly part before any plastic part molding carrier performs a plastic part molding operation with the second assembly parameter of the assembly part obtained after completing the plastic part molding operation, so as to accurately determine whether the position of the plunger on the carrier is qualified.

Description

Technical Field

[0001] The present invention relates to the field of detection technology, and in particular to a detection method and detection equipment for a plastic part molding carrier. Background Art

[0002] The prior art provides a plastic part molding carrier, which is provided with a cavity to complete the plastic part molding operation on the plastic part molding carrier.

[0003] In the process of a plastic part molding carrier repeatedly performing plastic part molding operations, in order to ensure that the plastic part molding operations can be completed accurately, the prior art usually detects assembly parameters of assembly parts of the plastic part molding carrier in the process of the plastic part molding carrier repeatedly performing plastic part molding operations. The specific detection process is: the prior art assumes that the assembly parameters of the assembly parts of all plastic part molding carriers are the same during assembly, and uses this as the standard parameter, and then obtains the assembly parameters of the assembly parts on the plastic part molding carrier after the plastic part molding operation is completed, and compares the obtained assembly parameters with the standard parameters to complete the detection. However, during actual assembly, the assembly parameters of assembly parts on different plastic part molding carriers are different, which results in the prior art being unable to accurately determine whether the assembly parameters of the assembly parts on the plastic part molding carrier are qualified.

[0004] Therefore, the above problems need to be solved urgently. Summary of the invention

[0005] The object of the present invention is to provide a method and device for detecting a plastic part molding carrier, so as to solve the problem that the prior art cannot accurately determine whether the assembly parameters of the assembly parts on the plastic part molding carrier are qualified.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] In one aspect, the present invention provides a method for detecting a plastic part molding carrier, comprising:

[0008] Acquire and record first assembly parameters of an assembly part on a plastic part molding carrier to be used for molding a plastic part, and bind the plastic part molding carrier and the first assembly parameters;

[0009] After the plastic part molding carrier completes the plastic part molding operation, obtaining the second assembly parameters of the assembly part on the plastic part molding carrier that has molded a good plastic part;

[0010] Compare the deviation between the second assembly parameter and the first assembly parameter of the same plastic part molding carrier, and if the deviation exceeds a preset deviation range, correct the deviation.

[0011] Preferably, the comparing the deviation between the second assembly parameter and the first assembly parameter of the same plastic part molding carrier comprises:

[0012] Compare the deviations of the second assembly parameter and the first assembly parameter before and after the same plastic part molding carrier completes a plastic part molding operation.

[0013] Preferably, the comparing the deviation between the second assembly parameter and the first assembly parameter of the same plastic part molding carrier comprises:

[0014] Compare the deviation between the second assembly parameter after the same plastic part molding carrier completes two or more plastic part molding operations in succession and the first assembly parameter before the first plastic part molding operation.

[0015] Preferably, the plastic part molding carrier circulates in an assembly line, and the correction of the deviation comprises:

[0016] The plastic part molding carrier is moved out of the assembly line.

[0017] Preferably, the assembly part is a fastener, an insert or a positioning part of the plastic part molding carrier.

[0018] Preferably, the method for detecting the plastic part molding carrier further comprises:

[0019] Acquire and record a first appearance image of a cavity wall of a molding carrier to be used for molding a plastic part, and bundle the plastic part molding carrier and the first appearance image;

[0020] After the plastic part molding carrier completes the plastic part molding operation, a second appearance image of the cavity wall of the cavity of the plastic part molding carrier is acquired;

[0021] The first appearance image and the second appearance image of the same plastic part molding carrier are compared.

[0022] Another aspect of the present invention further provides a detection device, comprising:

[0023] The inspection unit includes a visual inspection mechanism and a moving mechanism, wherein the visual inspection mechanism includes a camera, and the camera is configured to obtain an appearance image of a plastic part molding carrier circulating on the assembly line, and the moving mechanism includes a horizontal moving component, and the horizontal moving component is configured to move the camera so that the camera is aligned with the plastic part molding carrier; and

[0024] The control unit includes a computer control mechanism, and the computer control mechanism is communicatively connected with the visual detection mechanism.

[0025] Preferably, the moving mechanism further comprises a vertical moving component, and the vertical moving component is configured to move the camera in a vertical direction to adjust the distance between the camera and the plastic part molding carrier.

[0026] Preferably, the moving mechanism also includes a position detection component, which includes a slot-type photoelectric switch and a shading sheet that can be inserted into a detection slot of the slot-type photoelectric switch, and the shading sheet and the slot-type photoelectric switch are alternatively arranged on the camera and the vertical moving component.

[0027] Preferably, the control unit further comprises a gripping mechanism, the gripping mechanism is electrically connected to the computer control mechanism, and the gripping mechanism is configured to grip the plastic part molding carrier to move the plastic part molding carrier away from the assembly line.

[0028] Beneficial effects of the present invention: The present invention obtains the position parameters of the assembly parts before any plastic part molding carrier performs a plastic part molding operation, and uses this as the first assembly parameters, and obtains the position parameters of the assembly parts after any plastic part molding carrier completes the plastic part molding operation, and uses this as the second assembly parameters. That is, the present invention does not set standard assembly parameters for the assembly parts, but compares the first assembly parameters of the assembly parts before any plastic part molding carrier performs a plastic part molding operation with the second assembly parameters of the assembly parts obtained after completing the plastic part molding operation, so as to accurately determine whether the position parameters of the assembly parts on the plastic part molding carrier are qualified. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a bottom view of the first bearing portion and the hanging ear in the embodiment of the present invention;

[0030] Figure 2 is a top view of the first bearing portion and the hanging ear in an embodiment of the present invention;

[0031] Figure 3 is a flow chart of a method for detecting a plastic part molding carrier in an embodiment of the present invention;

[0032] Figure 4 is a schematic diagram of the structure of a detection device in an embodiment of the present invention;

[0033] Figure 5 yes Figure 3 A schematic diagram of the structure of the detection device in another viewing angle;

[0034] Figure 6 It is a front view of the detection device in the embodiment of the present invention.

[0035] In the figure:

[0036] 110, first bearing portion; 111, hanging ear; 1111, plunger; 1112, top screw; 112, rotating shaft;

[0037] 210. Visual inspection mechanism; 211. Camera;

[0038] 220, moving mechanism; 221, horizontal moving assembly; 222, vertical moving assembly; 223, position detection assembly; 2231, slot-type photoelectric switch; 2232, light shielding sheet;

[0039] 310. Grasping mechanism; 311. Gripping claw. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0041] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0043] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0044] Embodiment 1

[0045] The prior art provides a plastic part molding carrier, such as Figure 1 and Figure 2As shown, the plastic part molding carrier includes a first bearing part 110 and a second bearing part (not shown in the figure), the workpiece is located between the first bearing part 110 and the second bearing part, the first bearing part 110 is rotatably connected to two hanging ears 111, and a plurality of plungers 1111 are installed on the two hanging ears 111, and the plungers 1111 are assembly parts of the plastic part molding carrier, and the plungers 1111 are fixed to the hanging ears 111 by top screws 1112. The two hanging ears 111 can rotate around the rotating shaft 112 installed on the first bearing part 110, and the plungers 1111 on the hanging ears 111 are rotated to the top of the second bearing part placed on the first bearing part 110, and all the plungers 1111 can be pressed against the side of the second bearing part away from the first bearing part 110, and a cavity is formed between the first bearing part 110 and the second bearing part. The above-mentioned plastic part molding carrier circulates in the assembly line, and in each cycle the plastic part molding carrier undergoes injection molding and unloading processes. Therefore, the first load-bearing part 110 and the second load-bearing part need to be disassembled and assembled in one cycle, that is, before the plastic part molding carrier performs the plastic part molding operation or after the plastic part molding operation is completed, the first load-bearing part 110 and the second load-bearing part are split into two separate individuals and circulate along the assembly line at the same time. During the plastic part molding operation, the first load-bearing part 110 and the second load-bearing part are assembled together, resulting in the possibility that the top screw 1112 may become loose, and then the position of the plunger 1111 may change. Therefore, it is necessary to detect the position of the plunger 1111 on the hook 111 to ensure that all plungers 1111 can be pressed against the side of the second load-bearing part away from the first load-bearing part 110 during the plastic part molding operation.

[0046] The prior art usually assumes that the installation positions of all plungers 1111 on the ears 111 of all plastic part molding carriers during assembly are consistent, and uses this as the standard position to detect the position of the plunger 1111 on the first carrier 110 after the plastic part molding operation is completed. However, due to processing errors in the second carriers of different plastic part molding carriers, the installation positions of the plungers 1111 on the first carriers 110 of different plastic part molding carriers are different during actual assembly, making it impossible for the above detection method to accurately determine whether the position of the plunger 1111 on the first carrier 110 is qualified, thereby making it impossible to accurately determine whether the plastic part molding carrier is qualified.

[0047] To solve the above problems, this embodiment provides a method for detecting a plastic molding carrier. Figure 3 , the detection method of the plastic part molding carrier includes:

[0048] S1, obtaining and recording first assembly parameters of an assembly part on a plastic part molding carrier to be used for molding a plastic part, and binding the plastic part molding carrier and the first assembly parameters;

[0049] S2. After the plastic part molding carrier completes the plastic part molding operation, obtain the second assembly parameters of the assembly parts on the plastic part molding carrier that molded the good plastic part;

[0050] S3. Compare the deviation between the second assembly parameter and the first assembly parameter of the same plastic part molding carrier, and if the deviation exceeds a preset deviation range, correct the deviation.

[0051] In this embodiment, the position parameters of the plunger 1111 on the first bearing part 110 are obtained before any plastic part molding carrier performs a plastic part molding operation, and this is used as the first assembly parameter. The position parameters of the plunger 1111 on the first bearing part 110 are obtained after any plastic part molding carrier completes the plastic part molding operation, and this is used as the second assembly parameter. That is, this embodiment does not set a standard position of the plunger 1111, but compares the first assembly parameters of the plunger 1111 on the first bearing part 110 before any plastic part molding carrier performs a plastic part molding operation with the second assembly parameters of the plunger 1111 on the first bearing part 110 obtained after the plastic part molding operation is completed, so as to accurately determine whether the position parameters of the plunger 1111 on the plastic part molding carrier are qualified.

[0052] Specifically, when the deviation between the second assembly parameter and the first assembly parameter of the plunger 1111 exceeds a preset range, the position of the plunger 1111 on the first bearing part 110 is judged to be unqualified; when the position deviation of the plunger 1111 is within the preset range, the position of the plunger 1111 on the first bearing part 110 is judged to be qualified.

[0053] In combination with the above, the plunger 1111 on the first bearing portion 110 in this embodiment is a fastener of the plastic molding carrier, and is also the above-mentioned assembly part. Of course, in other optional embodiments, the above-mentioned assembly part can also be an insert or a positioning part of the plastic molding carrier, and this embodiment does not specifically limit this.

[0054] It can be understood that since the first load-bearing part 110 and the second load-bearing part in this embodiment are in a separated state before and after the plastic part molding operation is performed, that is, the first load-bearing part 110 and the second load-bearing part each flow along the assembly line, therefore in this embodiment, only one inspection station is required along the assembly line, and the inspection station is arranged at the front end of the injection molding station for injection molding on the assembly line. After the first load-bearing part 110 completes the inspection at the inspection station, if the position of the plunger 1111 on the first load-bearing part 110 is qualified, the first load-bearing part 110 and the second load-bearing part flow to the injection molding station for assembly and injection molding. When the plastic part molding operation is completed, the first load-bearing part 110 and the second load-bearing part circulate along the assembly line to the inspection station. That is, in this embodiment, the position parameters of the plunger 1111 on the first bearing part 110 obtained by this detection are the second assembly parameters compared to the position parameters of the plunger 1111 on the first bearing part 110 obtained by the previous detection, and are the first assembly parameters compared to the position parameters of the plunger 1111 on the first bearing part 110 obtained by the next detection.

[0055] Combination Figure 1 and Figure 2 In this embodiment, the position parameter of the plunger 1111 on the first carrying portion 110 is the distance between the plunger 1111 on the hook 111 and the first carrying portion 110 .

[0056] Furthermore, the above step S3 includes:

[0057] S31, comparing deviations of the second assembly parameter and the first assembly parameter before and after the same plastic part molding carrier completes a plastic part molding operation.

[0058] The plastic part molding carrier in this embodiment circulates in the assembly line. To ensure that all plungers 1111 can be pressed against the side of the second bearing part away from the first bearing part 110 in each plastic part molding operation, this embodiment detects the position parameters of the plungers 1111 on the first bearing part 110 of the plastic part molding carrier after each plastic part molding operation is completed.

[0059] Further, in order to obtain the spacing information between the plunger 1111 on the lug 111 of the first bearing part 110 and the first bearing part 110, in this embodiment, it is necessary to obtain the appearance image of the plastic part molding carrier. In order to obtain the appearance image of the first bearing part 110 and analyze the obtained appearance image of the first bearing part 110, this embodiment further provides a detection device, which includes a detection unit and a control unit, such as Figures 4 to 6As shown, the detection unit includes a visual detection mechanism 210 and a moving mechanism 220. The visual detection mechanism 210 includes a camera 211, and the camera 211 is configured to obtain an appearance image of a plastic part molding carrier circulating on the assembly line. The moving mechanism 220 includes a horizontal moving component 221, and the horizontal moving component 221 is configured to move the camera 211 to align the camera 211 with the plastic part molding carrier. The control unit includes a computer control mechanism (not shown in the figure), and the computer control mechanism is communicatively connected to the visual detection mechanism 210.

[0060] In this embodiment, before the first carrier portion 110 and the second carrier portion are transferred to the loading station, the first carrier portion 110 can be aligned with the camera 211, and the camera 211 captures an image of the first carrier portion 110 and uploads the image to a computer control mechanism, which compares the image of the first carrier portion 110 acquired this time with the image of the first carrier portion 110 acquired last time, and feeds back the comparison result.

[0061] It can be understood that, since a cavity is formed between the first bearing part 110 and the second bearing part in the present embodiment, when the first bearing part 110 and the second bearing part are assembled together, the surface on the side opposite to the first bearing part 110 and the second bearing part is the cavity wall of the cavity. After the plastic part molding operation, the surface on the side opposite to the first bearing part 110 and the second bearing part may produce scratches and other wear. When the degree of wear is large, it will cause defects in the produced workpiece, thereby increasing the product scrap rate and reducing the product production efficiency. In the present embodiment, when the first carrying part 110 and the second carrying part flow along the assembly line, the side opposite to the first carrying part 110 and the second carrying part faces upward, and the camera 211 can not only obtain the appearance image of the side opposite to the first carrying part 110 but also obtain the appearance image of the side opposite to the second carrying part. Therefore, the present embodiment can detect the degree of wear of the surface of the side opposite to the first carrying part 110 and the second carrying part. When the degree of wear of the surface of the side opposite to the first carrying part 110 and / or the second carrying part exceeds a preset range, the first carrying part 110 and / or the second carrying part is judged to be unqualified, thereby avoiding defects in the produced workpieces, thereby reducing the product scrap rate and improving product production efficiency.

[0062] Therefore, the detection method of the plastic part molding carrier in this embodiment further includes:

[0063] S4, acquiring and recording a first appearance image of a cavity wall of a plastic part molding carrier to be used for molding a plastic part, and bundling the plastic part molding carrier and the first appearance image;

[0064] S5, when the plastic part molding carrier completes the plastic part molding operation, obtaining a second appearance image of the cavity wall of the cavity of the plastic part molding carrier;

[0065] S6. Compare the first appearance image and the second appearance image of the same plastic part molding carrier.

[0066] The appearance image of the first bearing part 110 and the second bearing part facing upward is the first appearance image and the second appearance image. In this embodiment, the first appearance image of the first bearing part 110 and the second bearing part before any plastic part molding carrier performs a plastic part molding operation is compared with the second appearance image of the first bearing part 110 and the second bearing part obtained after the plastic part molding operation is completed, so as to accurately determine whether the wear degree of the surface of the first bearing part 110 and / or the second bearing part on the opposite side is acceptable.

[0067] See also Figure 4 In this embodiment, the visual inspection mechanism 210 includes more than two cameras 211 arranged along the conveying direction of the assembly line. The two cameras 211 respectively obtain images of the first carrying part 110 and the second carrying part of the same plastic part molding carrier to improve the inspection efficiency, thereby further improving the product production efficiency.

[0068] Furthermore, the moving mechanism 220 in this embodiment also includes a vertical moving component 222, which is configured to move the camera 211 along the vertical direction to adjust the distance between the camera 211 and the plastic part molding carrier, thereby ensuring that the images in the lens field of view captured by the camera 211 are clear, that is, the camera 211 can capture clear images of the first supporting part 110 and the second supporting part, thereby improving the detection accuracy and further ensuring the accuracy of the detection.

[0069] like Figure 6 As shown, the moving mechanism 220 in this embodiment also includes a position detection component 223, which includes a slot-type photoelectric switch 2231 and a shading sheet 2232 that can be placed in the detection slot of the slot-type photoelectric switch 2231. The shading sheet 2232 and the slot-type photoelectric switch 2231 are selectively arranged on the camera 211 and the vertical moving component 222 to accurately adjust the distance between the camera 211 and the first supporting part 110 or the second supporting part, so as to accurately focus, thereby ensuring that the camera 211 can accurately capture clear images of the first supporting part 110 and the second supporting part.

[0070] After the computer control mechanism of this embodiment completes the analysis of the images of the first carrier 110 and the second carrier, when the result is that the first carrier 110 and / or the second carrier is qualified, the first carrier 110 and / or the second carrier continues to flow along the assembly line. When the result is that the first carrier 110 and / or the second carrier is unqualified, the first carrier 110 and / or the second carrier needs to be repaired to correct the deviation. Since the plastic part molding carrier in this embodiment circulates in the assembly line, the control unit in this embodiment moves the first carrier 110 and / or the second carrier out of the assembly line, that is, the above step S3 also includes:

[0071] S32, moving the plastic part molding carrier out of the assembly line.

[0072] After the plastic molding carrier is moved out of the assembly line, all the plungers 1111 on the lugs 111 of the first carrier 110 are readjusted to press against the side of the second carrier away from the first carrier 110, and then the plastic molding carrier is moved back to the assembly line and the above step S1 is repeated.

[0073] In order to enable the control unit to move the first carrying part 110 and / or the second carrying part out of the assembly line, the control unit in this embodiment also includes a grasping mechanism 310, which is electrically connected to the computer control mechanism. The grasping mechanism 310 is configured to grasp the first carrying part 110 and / or the second carrying part of the plastic part molding carrier to move the first carrying part 110 and / or the second carrying part of the plastic part molding carrier away from the assembly line.

[0074] like Figure 4 and Figure 5 As shown, the gripping mechanism 310 in this embodiment includes two clamping claws 311 that can move relative to or away from each other to grip or release the first carrying portion 110 and / or the second carrying portion of the plastic part molding carrier.

[0075] Embodiment 2

[0076] Compared with the first embodiment, the difference of this embodiment is that step S3 includes:

[0077] S33, comparing deviations between second assembly parameters after the same plastic part molding carrier completes two or more consecutive plastic part molding operations and first assembly parameters before the first plastic part molding operation.

[0078] Since the position parameters of the plunger 1111 on the first bearing part 110 of the plastic part molding carrier usually do not change significantly before and after the first plastic part molding operation, that is, the position parameters of the plunger 1111 on the first bearing part 110 of the plastic part molding carrier usually change significantly after more than two plastic part molding operations, all the plungers 1111 cannot simultaneously press against the side of the second bearing part away from the first bearing part 110 during the plastic part molding operation. This embodiment improves production efficiency by reducing the number of inspections of the plastic part molding carrier.

[0079] Preferably, in this embodiment, the deviation between the second assembly parameter after the same plastic molding carrier completes two consecutive plastic molding operations and the first assembly parameter before the first plastic molding operation is compared to ensure improved production efficiency while avoiding increased product scrap rate.

[0080] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for detecting a plastic molding carrier, characterized in that: include: Obtaining and recording position parameters of assembly parts on a plastic part molding carrier to be used for molding plastic parts, and using the position parameters as first assembly parameters, and bundling the plastic part molding carrier and the first assembly parameters; After the plastic part molding carrier completes the plastic part molding operation, the position parameters of the assembly part on the plastic part molding carrier that has molded a good plastic part are obtained and used as the second assembly parameters; Compare the deviation between the second assembly parameter and the first assembly parameter of the same plastic part molding carrier, and if the deviation exceeds a preset deviation range, correct the deviation.

2. The method for detecting a plastic part molding carrier according to claim 1, characterized in that: The comparing the deviation between the second assembly parameter and the first assembly parameter of the same plastic part molding carrier comprises: Compare the deviations of the second assembly parameter and the first assembly parameter before and after the same plastic part molding carrier completes a plastic part molding operation.

3. The method for detecting a plastic part molding carrier according to claim 1, characterized in that: The comparing the deviation between the second assembly parameter and the first assembly parameter of the same plastic part molding carrier comprises: Compare the deviation between the second assembly parameter after the same plastic part molding carrier completes two or more plastic part molding operations in succession and the first assembly parameter before the first plastic part molding operation.

4. The method for detecting a plastic part molding carrier according to claim 1, characterized in that: The plastic part molding carrier circulates in the assembly line, and the correction of the deviation includes: The plastic part molding carrier is moved out of the assembly line.

5. The method for detecting a plastic part molding carrier according to claim 1, characterized in that: The assembly parts are fasteners, inserts or positioning parts of the plastic part molding carrier.

6. The method for detecting a plastic part molding carrier according to claim 1, characterized in that: The detection method of the plastic part molding carrier also includes: Acquire and record a first appearance image of a cavity wall of a mold cavity of a plastic part molding carrier to be used for molding a plastic part, and bundle the plastic part molding carrier and the first appearance image; After the plastic part molding carrier completes the plastic part molding operation, a second appearance image of the cavity wall of the cavity of the plastic part molding carrier is obtained; The first appearance image and the second appearance image of the same plastic part molding carrier are compared.

7. A detection device for executing the detection method of a plastic part molding carrier according to any one of claims 1 to 6, characterized in that: include: The detection unit comprises a visual detection mechanism (210) and a moving mechanism (220), wherein the visual detection mechanism (210) comprises a camera (211), wherein the camera (211) is configured to obtain an appearance image of a plastic part molding carrier circulating on an assembly line, and wherein the moving mechanism (220) comprises a horizontal moving component (221), wherein the horizontal moving component (221) is configured to move the camera (211) so as to align the camera (211) with the plastic part molding carrier; and The control unit comprises a computer control mechanism, wherein the computer control mechanism is communicatively connected to the visual detection mechanism (210).

8. The detection device according to claim 7, characterized in that: The moving mechanism (220) further comprises a vertical moving component (222), wherein the vertical moving component (222) is configured to move the camera (211) in a vertical direction to adjust the distance between the camera (211) and the plastic part molding carrier.

9. The detection device according to claim 8, characterized in that: The moving mechanism (220) further comprises a position detection component (223), the position detection component (223) comprising a slot-shaped photoelectric switch (2231) and a light shielding sheet (2232) capable of being placed in a detection slot of the slot-shaped photoelectric switch (2231), the light shielding sheet (2232) and the slot-shaped photoelectric switch (2231) being selectively arranged on the camera (211) and the vertical moving component (222).

10. The detection device according to claim 7, characterized in that: The control unit further comprises a gripping mechanism (310), the gripping mechanism (310) being electrically connected to the computer control mechanism, and the gripping mechanism (310) being configured to grip the plastic part molding carrier so as to move the plastic part molding carrier away from the assembly line.

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