JP5498708B2 - Appearance inspection apparatus and resin molded product manufacturing method - Google Patents

Description

  The present invention relates to an appearance inspection apparatus and a method of manufacturing a resin molded product, and in particular, a pattern is applied to the surface by an appearance inspection apparatus that detects irregularities in the appearance of an object to be inspected with a pattern on the surface, and a molding simultaneous transfer method. The present invention relates to a method for producing a resin molded product.

  Resin-molded products with patterns on the surface are used for decoration. For example, a case of a mobile phone or a laptop computer. This resin molded product is transferred from the transfer sheet sent into the mold at the same time as injection molding by an injection molding machine having a transfer sheet feeding device that sends a transfer sheet having a pattern layer formed as a transfer layer into the mold. The layer is transferred to the surface of the resin molded product and molded.

  The injection molding machine includes an A mold, a B mold on which a parting surface with the A mold is formed, and a transfer sheet feeding device that feeds a transfer sheet to the parting surface. At the time of injection molding, the transfer sheet is configured to be in close contact with the cavity surface of the A mold or the B mold. Accordingly, the cavity surface of one mold is not in direct contact with the resin molded product. At the time of injection molding, when injection molding is performed with foreign matter adhering between the cavity surface and the transfer sheet, a dent scratch (the dent scratch is referred to as a dent) occurs in the molded resin molded product.

  If foreign matter adheres to the cavity surface of the mold that is in direct contact with the resin molded product, the foreign material is embedded in the resin molded product and taken out from the injection molding machine, so the appearance of the single resin molded product is poor. Will occur, and no significant damage will occur during the manufacturing process.

  On the other hand, the foreign matter attached to the mold cavity surface on the side to which the transfer sheet is in close contact is not taken out from the injection molding machine together with the resin molded product. For this reason, once a dent occurs, dents are continuously generated in a plurality of resin molded products. Then, until the dent is detected and the treatment for removing the foreign matter is performed, the appearance defective products are continuously produced in large quantities.

  A typical size of the dent is 10 μm to 100 μm in diameter. If it is smaller than the diameter range, even if there is a dent, it will not be visually perceived by human eyes, so there will be no poor appearance. If it is larger than the diameter range, the apparatus operator can easily recognize visually, so that measures such as stopping the operation of the injection molding machine are easy.

  Conventionally, an inspector visually inspects a resin molded product to inspect the appearance defect.

  On the other hand, as a conventional LCD panel surface inspection device, a ring illumination lamp is placed on the top of the liquid crystal panel, a camera is placed directly above the liquid crystal panel, and the liquid crystal panel is irradiated with light from the diagonally upper side and reflected. 2. Description of the Related Art A liquid crystal panel appearance inspection apparatus that captures light with a camera and detects scratches, chips, and cracks on the surface of the liquid crystal panel is known. (For example, see Patent Document 1)

  Conventionally, as a surface inspection method for detecting a surface defect of an inspection object, the surface of the inspection object is irradiated with light emitted from a light source that emits diffused light, and reflected light is photographed with a camera. The light shielding body is disposed in the optical path, and the inspection area irradiated with the emitted light is divided into (1) a bright area, (2) a dark area darker than the bright area, and (3) these boundary areas, A surface inspection method is known in which the illumination conditions are changed for each region to diversify the detected surface state. (For example, see Patent Document 2)

Japanese Patent Laying-Open No. 2003-247953 (particularly claim 1) JP 2005-208054 A

  In visual appearance inspection, inspection may be delayed, and it is insufficient as an on-line inspection of a bruise product that tends to occur continuously. Therefore, a dent inspection by an appearance inspection apparatus is desired.

  A conventional liquid crystal panel appearance inspection apparatus targets a panel surface having no pattern on the surface. Therefore, the reflected light from the surface region where there is no abnormality has a constant color (wavelength region). On the other hand, the resin molded product desired to be inspected here has a pattern formed on the surface. The size of the dent is fine. The light reflected on the surface of the resin molded product is colored, and the color varies depending on the surface position. Therefore, a portion in which the light derived from the dent is buried in the reflected light depending on the pattern is generated, and the detection is not successful.

  Further, the conventional second appearance inspection apparatus has an illumination limited area and a dark area in addition to the bright area. The light source used here is a diffuse light illumination light source. The illumination limited area is an area where light from a light emitting area that is a part of the light source can reach. The dark area is an area having a light quantity that emits a light reception signal although the light from the light source is completely blocked (see, for example, FIG. 6). Furthermore, the dent is a minute concave defect, and the amount of light that causes irregular reflection is small.

  Therefore, when the surface of the resin molded product having a handle is observed by the appearance inspection device, a portion where light derived from the dent is buried in the reflected light depending on the handle is generated, and the detection is not successful.

  Then, this invention makes it a subject to provide the external appearance inspection apparatus of the resin molded product which improved the detection precision of uneven | corrugated defects, such as a dent.

  Moreover, this invention makes it a subject to provide the manufacturing method of the resin molded product which inspects uneven | corrugated defects, such as a dent, on-line, and improves productivity.

  Other problems of the present invention will become apparent from the description of the present invention.

An appearance inspection apparatus according to one aspect of the present invention includes:
An appearance inspection apparatus for inspecting the surface irregularity defect of an object to be inspected,
A light source having a certain directivity;
A camera that captures the reflected light generated by the light emitted from the light source reflected by the surface of the object to be inspected;
The light source emits main outgoing light in the outgoing optical axis direction and emits radiation angle light having a certain spread angle with the outgoing optical axis as a central axis,
The emission optical axis of the light source and the lens optical axis of the camera are inclined at an equal angle with respect to a vertical line that is a virtual line standing on the surface of the inspection object, and are opposed to each other,
By arranging a shielding plate in the optical path between the light source and the inspection object to shield the main emitted light from the light source, a radiation angle illumination area is created on the surface of the inspection object,
Using the radiation angle illumination region as an inspection region, the inspection region is photographed by the camera to obtain a photographed image, and the uneven defect is inspected from the photographed image.

  In the appearance inspection apparatus according to a preferred embodiment of the present invention, the inspection object may have a pattern formed on the surface thereof, and the inspection area may include a pattern.

  The appearance inspection apparatus according to the present preferred embodiment is an appearance inspection apparatus in which the feature of the present invention is further exhibited that it is possible to accurately detect uneven defects in a region where a pattern has been formed, which has been difficult in the past.

  In the appearance inspection apparatus according to another preferred embodiment of the present invention, the inspection object includes a transfer sheet on which a transfer layer is formed placed in a mold, and a molten resin is injected into the mold. Alternatively, it may be a resin molded product that is molded by a simultaneous molding transfer method in which the transfer layer is transferred simultaneously with injection molding.

  According to the present preferred embodiment, it is possible to detect a dent that tends to occur in the simultaneous molding transfer method and that has been difficult to detect online in the past.

  In the appearance inspection apparatus according to another preferred embodiment of the present invention, the concave / convex defect may be a concave portion formed on a plane.

  According to the present preferred embodiment, an appearance inspection apparatus having a feature of detecting a dent that has been difficult to detect online in the past is obtained.

  In the visual inspection apparatus according to another preferred embodiment of the present invention, the inspection object and the inspection area are relatively moved, and all areas of the inspection object area on the surface of the inspection object are sequentially moved. The inspection area may be an image obtained by photographing with the camera.

  According to the present preferred embodiment, the inspection target area can be substantially enlarged, and the apparatus becomes more convenient to use.

The method for producing a resin molded product according to another aspect of the present invention includes the following steps (a) to (c).
A. A resin molded product manufacturing process for molding the resin molded product by transferring the transfer layer simultaneously with the injection molding by an injection molding machine having a transfer sheet feeding device for feeding the transfer sheet formed with the transfer layer into the mold;
B. The resin molded product manufactured by the resin molded product manufacturing process is an inspection object, and is a step of inspecting the surface unevenness defect of the inspection object,
A light source having a certain directivity;
Having a camera that captures reflected light generated by reflection of light emitted from the light source on the surface of the object to be inspected;
The light source emits main outgoing light in the outgoing optical axis direction and emits radiation angle light having a certain spread angle with the outgoing optical axis as a central axis,
The emission optical axis of the light source and the lens optical axis of the camera are inclined at an equal angle with respect to a vertical line that is a virtual line standing on the surface of the inspection object, and are opposed to each other,
By arranging a shielding plate in the optical path between the light source and the inspection object to shield the main emitted light from the light source, a radiation angle illumination area is created on the surface of the inspection object,
Taking the radiation angle illumination area as an inspection area, obtaining an inspection image by photographing the inspection area with the camera,
An irregularity defect inspection step of performing image processing on the inspection image, detecting an irregularity defect of the resin molded product that is the inspection object corresponding to the inspection image, and determining whether the resin molded product is good or defective ,
C. A step of stopping the resin molded product manufacturing process when a defect of the resin molded product is continuously detected a predetermined number of times by the unevenness defect inspection step.

  The present invention described above, preferred embodiments of the present invention, and components included in these can be implemented in combination as much as possible.

  An appearance inspection apparatus according to one aspect of the present invention is an appearance inspection apparatus that inspects a surface irregularity defect, and emits radiant angle light on the surface of an inspection object using a directional light source together with other configurations. An illumination area is created, and the radiation angle illumination area is set as an appearance inspection area.

  The light applied to the radiation angle illumination area does not include any light that is regularly reflected on the surface of the object to be inspected and enters the camera. For this reason, the imaging of the appearance inspection area having no irregularity defect is dark. Even if a pattern is formed in the appearance inspection area, since there is no reflected light entering the camera, a change in the properties of reflected light such as a color derived from the pattern is not recognized at all. On the other hand, since it is usually dark, even if it is a small amount of light, if there is light emitted from that area, it will surely appear in the camera, and further data processing such as black and white binarization of imaging will disturb the disturbance. Progress without receiving.

  At the same time, the light emitted to the radiation angle illumination area includes radiation angle light from a light source. The radiation angle light is specularly reflected in the appearance inspection area having no irregularity defect and emitted outside the camera field of view. In addition, the radiation angle light is diffusely reflected in the appearance inspection region having the concavo-convex defect and enters the camera field of view and is imaged.

  In this way, minute irregularities on the surface can be accurately detected without being obstructed by the surface color or the like. For example, even if a pattern is decorated on the surface, or even if the surface is colored with high brightness, it is possible to detect the irregularity defect generated on the surface.

  The method for producing a resin molded product according to another aspect of the present invention is a combination of the so-called simultaneous molding transfer method using a transfer sheet and the appearance inspection apparatus according to one aspect of the present invention, together with other configurations. . The appearance of the resin molded product exiting the injection molding machine is inspected online, and the injection molding machine is stopped when irregularities are continuously detected a predetermined number of times. For this reason, the inconvenience that the appearance defect product which is likely to occur in the manufacturing process of the resin molded product by the transfer method is continuously manufactured in large quantities is solved.

It is a perspective view which shows the optical part 10 of an external appearance inspection apparatus. It is a plane explanatory view showing a radiation angle illumination area on the inspection object. It is sectional explanatory drawing which shows the positional relationship of the light source 21, the to-be-inspected object 41, the camera 31, etc. FIG. It is explanatory drawing which shows the relationship of the viewing angle 2 (theta) of a light source, the radiation angle (theta), and the radiation angle light illumination area | region 46, etc. FIG. It is explanatory drawing which shows the relationship between the radiation angle (theta) of a light source, and the width | variety L2 of a radiation angle light illumination area | region. It is explanatory drawing of the injection molding apparatus 6 provided with the external appearance inspection apparatus 1. FIG. 4 is a control flowchart of the injection molding apparatus 6.

  Hereinafter, an appearance inspection apparatus and a method of manufacturing a resin molded product according to an embodiment of the present invention will be further described with reference to the drawings. The dimensions, materials, shapes, relative positions, etc. of the members and parts described in the embodiments of the present invention are not intended to limit the scope of the present invention only to those unless otherwise specified. It is just an illustrative example.

  FIG. 1 is a perspective view showing the optical unit 10 of the appearance inspection apparatus, and FIG. 2 is an explanatory plan view showing a radiation angle illumination area 46 on the inspection object 41. FIG. 3 is a cross-sectional explanatory view showing the positional relationship between the light source 21, the inspection object 41 and the camera 31, and FIG. 4 is an explanatory view showing the relationship between the light source viewing angle 2θ, the emission angle θ and the emission angle light illumination region 46, etc. FIG. FIG. 5 is an explanatory diagram showing the relationship between the radiation angle θ of the light source and the width L2 of the radiation angle light illumination region.

  The optical unit 10 of the appearance inspection apparatus 1 includes a surface light source 21 that is a directional light source, a moving stage 13 on which an inspection object is placed, a camera 31, and the like.

  The light source has a certain directivity. That is, the angular distribution of the light emitted from the light source depends on the angle. A preferred viewing angle (2θ) range is 10 degrees to 30 degrees. Here, the viewing angle (2θ) is expressed as a full width at half maximum, which is the light emission angle measured when the emission intensity becomes half of the peak value. If it exists in said viewing angle range, a radiation angle light illumination area | region will appear with a suitable width | variety, and the unnecessary light which reflects a pattern will decrease.

  The light source 21 emits main outgoing light 23 in the direction of the outgoing optical axis 22 and emits radiation angle light 24 having a constant spread angle with the outgoing optical axis as the central axis. If the outgoing optical axis is the central axis, it can be considered that the constant spread angle is θ. In this case, the angle at which the radiation angle light spreads may be approximated to be 2θ.

  The light source is preferably a surface light source in which a plurality of LED lamps with a lens are arranged in a plane. LED lamps have a long life. And if it is a surface light source, a radiation angle light illumination area | region will appear in suitable width. An example of the size of the surface light source is 100 mm × 100 mm.

  The light output optical axis 22 of the light source and the lens optical axis 32 of the camera are inclined at the same angle with respect to the vertical line 42 that is a virtual line standing on the surface of the inspection object 41 and face each other. The emission optical axis 22 of the light source intersects the surface of the inspection object 41 at an angle (α) indicated by an arrow 87. The lens optical axis 32 of the camera intersects the surface of the inspection object 41 at an angle (β) indicated by an arrow 88. Angle α and angle β are equal. A preferred angle α (ie, angle β) is 10 to 80 degrees.

  The outgoing optical axis 22, the lens optical axis 32, and the vertical line 42 are arranged in the same plane. That is, the camera 31 is disposed at a position and an angle at which regular reflection light of light incident on the detection region from the light source 21 can be detected.

  A suitable object to be inspected is a resin molded product, and this embodiment will also be described by selecting a resin molded product as an example of the object to be inspected. A resin molded product 41 that is an object to be inspected is placed on the moving stage 13.

  The resin molded product 41 may have a pattern formed on the surface, may be a solid coating, may be colorless and transparent, or may be colored and transparent. The appearance inspection apparatus according to the present invention can inspect unevenness of appearance without any trouble even if a handle is formed. The pattern may be rephrased as a pattern, and means a diagram, color coding or blurring that appears on the surface. It may be an achromatic pattern or a chromatic pattern. Furthermore, the metal color may be a metal color ink or metal particles.

  A light shielding plate 25 is disposed in the optical path of outgoing light from the light source 21 toward the inspection object 41. The light shielding plate 25 blocks the emitted light emitted from the light source 21, creates a radiation angle light illumination region 46 on the resin molded product that is an inspection object, and creates a penumbra region 48 and a light shielding region 47. The surface of the inspection object located in the radiation angle light illumination area 46 becomes an inspection area, and reflected light from the inspection area is photographed and analyzed by the camera 32.

  The radiation angle light illumination region 46 is a region where only the radiation angle light 24 is irradiated without including the main emission light 23 emitted from the light source 21. Referring to FIG. 4, on the end face of light shielding plate 25, radiation angle light illumination region 46, which is a region sandwiched between radiation angle light 24 a going to the inside of the light shielding plate (left side in FIG. 4) and emission optical axis 22, is created. . On the other hand, a penumbra region 48, which is a region sandwiched between the radiation angle light 24b toward the outside of the light shielding plate (right side in FIG. 4) and the output optical axis 22, is created. The penumbra area 48 is irradiated with the radiation light 24 and simultaneously with the main outgoing light 23. Further, a light shielding region 47 that is an area toward the inner side of the light shielding plate 25 is created with the radiation angle light 24a directed toward the inner side of the light shielding plate 25 (left side in FIG. 4) as a boundary. The radiation angle light 24 does not reach the light shielding region 47 by the light shielding plate, and the main emitted light 23 does not reach by the light shielding plate.

  When the main emission light 23 is irradiated on the surface of the inspection object 41, the regular reflection light is detected by the camera 31. The amount of the regular reflection light varies depending on the color pattern of the surface of the inspection object. For this reason, the penumbra area 48 cannot be used in the appearance inspection apparatus according to the present invention.

  The radiation light illumination area 46 is not irradiated with the main emitted light 23. For this reason, the regular reflection light is not reflected toward the camera 31. For this reason, if there is no uneven defect on the surface of the inspection object, the image captured by the camera is dark.

  If the concave defect 431 exists on the surface of the object to be inspected, the radiation angle light irradiated on the radiation angle light illumination area 46 is diffusely reflected by the concave defect 431, and the irregular reflection light reaches the camera, and the captured image of the camera is bright. It will contain parts.

  The camera may be a line sensor camera including a line sensor in which a large number of light amount detection elements are arranged one-dimensionally, or may be an area camera arranged two-dimensionally.

  Since the radiation angle illumination area 46 is formed in an elongated shape, a line sensor camera is suitable. After the single imaging, the moving stage 13 is moved, the surface reflection of the adjacent inspection object is imaged, and the movement and imaging are repeated sequentially to cover the desired inspection area.

  As long as the radiation angle illumination area 46 described above is satisfied, the appearance inspection apparatus of the present invention is realized. However, in order to avoid malfunctions and deterioration of accuracy due to stray light, the light shielding plate completely covers the surface of the inspection object. It is preferable that it is more than the area to cover.

  A distance 83 (k1) between the light source 21 and the inspection object 41 can be set to 15 mm to 1500 mm. A distance 84 (k2) between the camera 31 and the inspection object 41 can be set to 15 mm to 1500 mm.

  The width (L2) of the radiation angle light illumination region 46 may be 1 mm to 5 mm.

  A preferable arrangement can be determined and implemented within the range of the light source and the distance range between the light source and the object to be inspected.

  For example, when the viewing angle 81 (2θ) of the light source is 30 degrees, the angle 87 (α) between the outgoing optical axis and the inspection object is 60 degrees, and the width 86 (L2) of the radiation angle light illumination region 46 is set to 5 mm Next, the distance 85 (L1) between the shielding plate and the inspection object is obtained.

  In this case, the radiation angle 82 (θ) is 15 degrees.

  Referring to FIG. 5, when a right triangle surrounded by points 91, 92, and 93 is considered, Expression (1) is established.

  Equation (1) is transformed to derive equation (2).

  Subsequently, when L2 is obtained from Expression (2), Expression (3) is established.

In Equation 3,
α = 60 degrees θ = 15 degrees L2 = 5 mm is substituted. At this time, (α−θ) = 45 degrees = π / 4.

  Therefore, L1 is 13.66 mm.

  Since the width 86 (L2) of the radiation angle illumination region 46 is as narrow as 1 mm to 5 mm, the region is insufficient to cover the surface of the resin molded product. For this reason, the inspection object and the inspection area are relatively moved, and the entire area of the inspection object area on the surface of the inspection object is sequentially imaged by the camera as the inspection area to obtain a plurality of captured images. The relative movement is preferably performed by moving the object to be inspected by moving the moving stage 13.

  Next, a method for inspecting the concavo-convex defect from the photographed image will be described.

  As already described, if the inspection area is a plane, the captured image is dark. If there is a recess in the inspection area, a small bright area appears in the captured image. The recess is, for example, a dent. The bright area can be rephrased as a white area.

  For example, if each pixel of the photographed image is converted into a binary black and white and the number of pixels in which white occurs is equal to or greater than a threshold, it can be determined that the defect is a concave defect. In addition, for example, a known image recognition unit may be employed to determine that the defect is a concave defect when an image of a certain size is captured.

  FIG. 6 is an explanatory diagram of the injection molding apparatus 6 provided with the appearance inspection apparatus 1, and FIG. 7 is a control flowchart of the injection molding apparatus 6.

  The injection molding apparatus 6 includes a mechanical unit 60 and a molding control unit 61. The appearance inspection apparatus 1 includes an optical unit 1 and an inspection control unit 11. The molding controller 61 and the inspection controller 11 are controlled by the overall controller 72. A resin molded product manufactured by the injection molding apparatus 6 is taken out from the injection molding apparatus 6 by a robot arm 71 serving as a transfer means, and placed on a moving stage of the optical unit 10. The robot arm 71 also takes out the resin molded product after the appearance inspection and moves it to the stock yard.

  The mechanical unit 60 includes an A mold 62 and a B mold 63. A transfer sheet 64 in which a transfer pattern is continuously formed on a belt-like base material sheet is held in a roll shape by a supply roll 65. When the transfer sheet 64 is disposed at a predetermined position with respect to the A mold 62, the A mold 62 is brought into close contact with the B mold 63, a molten resin is injected into the mold cavity, and the resin is molded. Is done. At the same time, the transfer pattern on the transfer sheet 64 is transferred to the surface of the resin molded product to form a molded simultaneous transfer resin molded product.

  After cooling, the A mold 62 is separated from the B mold 63, and the resin molded product 41 is taken out of the cavity by the robot arm 71 and placed on the moving stage of the optical unit 10.

  In addition, since only the base sheet remains in the transfer sheet 64 after the transfer pattern has been transferred, the base sheet is wound around the base sheet winding unit 66. At the same time, a new transfer sheet portion is placed on the cavity surface of the A mold 62.

  A transfer roll 65 and a substrate sheet take-up unit that arrange the transfer sheet 64 on the cavity surface and feed it out by a predetermined length are transfer sheet feeding devices. The transfer sheet feeding device may position the sheet-by-sheet transfer sheets one by one on the cavity surface.

  The molding control unit 61 performs the movement of the A mold 62, the injection of the resin, the winding of the transfer sheet, and the like.

  The inspection control unit 11 performs the movement of the moving stage 13, the photographing of the inspection image by the camera 31, the image processing of the inspection image (for example, black and white binarization processing), the good / bad determination of the resin molded product by detecting the uneven defect, and the like. Do.

  The inspection control unit 11, the molding control unit 61, and the overall control unit 72 are composed of, for example, a computer and a program.

  A control operation of the injection molding apparatus 6 including the appearance inspection apparatus 1 will be described with reference to a flowchart of processing performed by the overall control unit 72 shown in FIG. In order to stop the injection molding machine when defective products continue for a predetermined number of times, for example, a number of 3 is input in advance as the number of times P as the predetermined number of times.

  The operation is started at S100. In S101, the number (n) of the continuous failure counter is reset to zero. Thereafter, the injection molding machine 6 operates to manufacture one resin molded product, and the appearance inspection apparatus 1 performs the appearance inspection of the resin molded product.

  In S102, the overall control unit 72 acquires defect detection data from the inspection control unit. If there is a defect and the product is defective, the process proceeds to S103, and the number (n) of the continuous defect counter is compared with the predetermined number P.

  If there is no defect in S102, the process returns to S101, the number (n) of the continuous failure counter is reset to zero again, and the process of S102 is repeated.

  If n = P in S103, the overall controller 72 sends a stop signal to the molding controller 61, and the molding controller 61 stops the injection molding machine. If n <P in S103, the process proceeds to S110, and 1 is added to the number (n) of the continuous failure counter. Thereafter, the process proceeds to S102 and the process is repeated.

  As described above, if an appearance defect is continuously detected P times, the injection molding operation is stopped. Therefore, even if an appearance defect is caused by a dent, A situation in which a large amount is manufactured is prevented.

DESCRIPTION OF SYMBOLS 1 Appearance inspection apparatus 6 Injection molding machine 10 Optical part 11 Inspection control part 12 Dark room 13 Moving stage 21 Surface light source which is a directional light source 22 Outgoing optical axis 23 Main outgoing light 24 Radiation angle light 25 Shading plate 31 Camera 32 Lens optical axis 41 Resin molded product as inspection object 42 Vertical line as virtual line 431, 432, 433 Concave defect 46 Radiation angle light illumination area 60 Machine part 61 Molding control part 62 A mold 63 B mold 64 Transfer sheet 65 Supply roll 66 Substrate sheet winding unit 71 Robot arm as transfer means 72 Overall control unit 81 Viewing angle 2θ of directional light source 21
82 Radiation angle θ of directional light source 21
83 Distance between light source and inspection object k1
84 Distance between camera and inspection object k2
85 Distance between shield and inspection object L1
86 Radiation angle light illumination area width L2
87 Angle of outgoing optical axis and inspection object α
88 Angle between lens optical axis and object to be inspected β

Claims (6)

An appearance inspection apparatus for inspecting the surface irregularity defect of an object to be inspected,
The object to be inspected, pattern on the surface have been formed, which contains the handle to the biopsy査領zone,
A light source having a certain directivity;
A camera that captures the reflected light generated by the light emitted from the light source reflected by the surface of the object to be inspected;
The light source emits main outgoing light in the outgoing optical axis direction and emits radiation angle light having a certain spread angle with the outgoing optical axis as a central axis,
The emission optical axis of the light source and the lens optical axis of the camera are inclined at an equal angle with respect to a vertical line that is a virtual line standing on the surface of the inspection object, and are opposed to each other,
A light-shielding plate is disposed in the optical path between the light source and the inspection object to shield the main emitted light from the light source, so that the inner surface of the light-shielding plate from the end surface of the light-shielding plate is placed on the surface of the inspection object. Creating a radiation angle light illumination region that is a region sandwiched between the radiation angle light directed to and the exit optical axis passing through the end face of the light shielding plate,
The radiation angle illumination region as the examination region to obtain a photographed image by photographing the inspection region in the camera, the appearance inspection apparatus characterized by inspecting unevenness defect from the photographed image.   The object to be inspected is molded by a simultaneous molding transfer method in which a transfer sheet on which a transfer layer is formed is placed in a mold, molten resin is injected into the mold and the transfer layer is transferred simultaneously with injection molding. The appearance inspection apparatus according to claim 1, wherein the appearance inspection apparatus is a resin molded product.   The appearance inspection apparatus according to claim 1, wherein the concavo-convex defect is a concave portion generated in a plane.   The inspection object and the inspection area are relatively moved, and the entire area of the inspection object area on the surface of the inspection object is sequentially photographed by the camera as the inspection area to obtain a photographed image. The visual inspection apparatus according to claim 1.   The visual inspection apparatus according to claim 1, wherein the light source is a surface-emitting light source in which a plurality of LED lamps each having a lens are arranged. The manufacturing method of the resin molded product which consists of the following processes i to c.
A. A resin molded product manufacturing process for molding the resin molded product by transferring the transfer layer simultaneously with the injection molding by an injection molding machine having a transfer sheet feeding device for feeding the transfer sheet formed with the transfer layer into the mold;
B. The resin molded product manufactured by the resin molded product manufacturing process is an inspection object, and is a step of inspecting the surface unevenness defect of the inspection object,
The object to be inspected, pattern on the surface have been formed, which contains the handle to the biopsy査領zone,
A light source having a certain directivity;
Having a camera that captures reflected light generated by reflection of light emitted from the light source on the surface of the object to be inspected;
The light source emits main outgoing light in the outgoing optical axis direction and emits radiation angle light having a certain spread angle with the outgoing optical axis as a central axis,
The emission optical axis of the light source and the lens optical axis of the camera are inclined at an equal angle with respect to a vertical line that is a virtual line standing on the surface of the inspection object, and are opposed to each other,
A light-shielding plate is disposed in the optical path between the light source and the inspection object to shield the main emitted light from the light source, so that the end surface of the light-shielding plate is placed on the surface of the inspection object from the end surface of the light-shielding plate Creating a radiation angle light illumination area that is sandwiched between the radiation angle light facing and the exit optical axis passing through the end face of the light shielding plate;
Examples radiation angle illumination region and the inspection region, said inspection area to obtain an inspection image taken with the camera,
An irregularity defect inspection step of performing image processing on the inspection image, detecting an irregularity defect of the resin molded product that is the inspection object corresponding to the inspection image, and determining whether the resin molded product is good or defective ,
C. A step of stopping the resin molded product manufacturing process when a defect of the resin molded product is continuously detected a predetermined number of times by the unevenness defect inspection step.

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