JP4238414B2 - Molded product inspection device and inspection method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an inspection apparatus and an inspection method for determining molding defects such as molding burrs, molding defects, and mold misalignment of molded articles. In particular, the present invention relates to an inspection apparatus and an inspection method for inspecting and determining defects of a molded product due to image processing and defects of the molded product due to mold misalignment.
[0002]
[Prior art]
As a prior art relating to the present invention, there is a molded product burr inspection machine shown in FIG. FIG. 21 shows a main part of an inspection machine for inspecting burrs of an O-ring as a molded product. In FIG. 21, an O-ring S that is an object to be inspected is produced by molding a molding material such as rubber with a molding machine. In this production process, the mold is configured as a split mold because the O-ring S that is the object to be inspected is released from the mold.
[0003]
In the O-ring S molded with this split mold, burrs are generated between the split surfaces of the split mold (in the radial direction of the O-ring). Of these burrs, the inner burrs are largely formed on the inner surface due to the filling of the molding material, and are thus cut in a finishing process, which is a subsequent process after molding. However, molding defects such as defects generated on the inner peripheral surface remain as they are.
On the other hand, external burrs are not generated, but may occur due to wear on the divided surfaces or mold misalignment, resulting in defective molded products. Further, as described above, a defect occurs due to misalignment. For this reason, it is necessary to inspect the molded product.
[0004]
In FIG. 21, the molded O-ring S is moved and supplied by the conveyor 80 and set immediately below the photographing camera 71. The O-ring S detects a burr B formed on the O-ring by a sensor provided in the photographing camera 71 in a state where the photographing camera 71 is set in a planar state. Then, whether or not the burr of the O-ring S has a length within a range that does not cause a problem in terms of the sealing function is measured to determine pass / fail.
[0005]
This pass / fail judgment is made by irradiating the 0 ring S with light from a spot illuminator 65 arranged on the side between the photographing camera 71 and the O-ring S, and the reflected light thus irradiated is provided on the photographing camera 71. The photoelectric conversion is performed via the sensor, and this is calculated by an arithmetic circuit provided in the computer 72 to project the shape of the burr B of the O-ring S on the plane of the display screen 73. Then, the burr B of the O-ring S is visually determined whether there is a problem with the sealing ability as the O-ring S. The computer 72 is provided with a display screen 73, and the outline of the burrs B is displayed on the display screen 73 as a black plane.
[0006]
[Problems to be solved by the invention]
The display screen 73 shown in FIG. 22 is an actual example in which an O-ring and a burr B in which a black portion is whitened for easy understanding are displayed together. As is clear from the example displayed on the display screen 73, in practice, both the O-ring S and the burr B are displayed in black, making the distinction unclear, and the length of the burr B can be accurately determined. It becomes difficult.
In particular, when the length of the burr B is formed constant on the peripheral surface of the O-ring, the O-ring S and the burr B cannot be distinguished from each other, and even the O-ring S with the burr B has no burr B. It will be determined as an O-ring. For this reason, a defective O-ring S having burrs B is mixed with non-defective products as being free of burrs B and shipped to the market.
[0007]
Further, even when the O-ring S has a circular cross-sectional defect due to misalignment between the upper mold and the lower mold, a deformation defect portion of the O-ring S due to mold misalignment is not detected as a shape, so that it is not determined as a defective product. Then, it moves to the next process and is mixed with non-defective products.
Furthermore, even if a molding defect occurs on the inner peripheral surface of the O-ring S, it cannot be determined whether or not the size of the O-ring S causes a functional problem. . In particular, in the case of a small defect portion, even if there is a problem, it is overlooked and determined as a non-defective product.
[0008]
The present invention has been made in view of the above-mentioned problems, and its technical problem is that a defect due to a burr length, a defect of a deformed portion formed due to misalignment, and a defect due to molding are present. This is to determine the quality of the molded product by accurately calculating the defect of the part.
[0009]
Also, check the molding machine so that it can be judged whether the length of the burr, the size of the defective part and the deformed part is good or bad, and the molding defect in the molding process, the clamping force and the accuracy of the split surface of the mold can be judged. It is to make it possible.
[0010]
Furthermore, an inspection method for determining the quality by calculating the size of the defective portion of the molded product is revealed.
[0011]
[Means for Solving the Problems]
The present invention has been made to solve the above-described problems, and technical means thereof are configured as follows.
[0012]
A molded product inspection device according to a first aspect of the present invention is an inspection device for inspecting the shape of an inspected molded product (S) having an annular shape, and is a time for attaching and rotating the inspected molded product (S). The moving device (6) and the inspected molded product (S) attached to the rotating device (6) are arranged from the radial direction toward the outer peripheral surface or from the axial direction toward the inner peripheral surface and the image sensor (4). And an illuminating device (9) arranged on the opposite side of the photographic camera (2) to irradiate the outer peripheral surface or inner peripheral surface of the inspected molded product (S) to the photographic camera (2) side And an arithmetic processing section (24) for calculating an outer peripheral surface shape or an inner peripheral surface shape of the inspected molded product (S) by performing arithmetic processing on a photoelectric conversion signal input from the photographing camera (2). The part (24) is the boundary position of the outer shape passing through the radial center line of the cross section of the inspected molded product (S). The reference position (X) which is the center position (X2) of the axis of (X1) or the inspected molded article (S) is obtained, and the inspection position of the object to be inspected (S) is first determined from the reference position (X). As a virtual boundary position (Y) and a position different from the reference position (X) to the first virtual boundary position (Y) as a second virtual boundary position (Z). To obtain a first distance (L1, L3) from the first virtual boundary position (Y) to a first virtual boundary position (Y) and a second distance (L2, L4) from the reference position (X) to the second virtual boundary position (Z). When each value of the first distance (L1, L3) or the second distance (L2, L4) is out of the set value range, it is determined as defective.
[0013]
A molded product inspection apparatus according to a second aspect of the present invention is an inspection device for inspecting the shape of an inspected molded product (S) having an annular shape, and is a circuit for attaching and rotating the inspected molded product (S). An imaging camera having an image sensor (4) arranged in the direction tangential to the outer peripheral surface of the moving product (6) and the inspected molded product (S) attached to the rotating device (6), and having an image sensor (4) (2), an illuminating device (9) disposed on the opposite side of the photographing camera (2) and irradiating the outer peripheral surface of the inspected molded product (S) toward the photographing camera (2), and the photographing camera (2) An arithmetic processing unit (24) for determining the outer peripheral surface shape of the inspected molded product (S) by arithmetically processing the input photoelectric conversion signal, and the arithmetic processing unit (13) of the inspected molded product (S). The boundary position (X1) of the outline that passes through the center line of the cross section is obtained, and the one side that is orthogonal to the center line The half-contour of the shape and the entire contour of the inspected molded product (S) corresponding to the half-contour are aligned at the same position to obtain a position intersecting the center line as the first virtual boundary position (Y), and the center line The second virtual boundary position (Z) is a position that intersects the center line with the half contour of the outer shape on the other side orthogonal to the entire contour of the inspected molded product (S) corresponding to the half contour at the same position. The first distance (L1) from the boundary position (X1) to the first virtual boundary position (Y) and the second distance (L2) from the boundary position (X1) to the second virtual boundary position (Z) Are compared with the corresponding set values, and when the first distance (L1) and the second distance (L2) are out of the range of the corresponding set values, it is determined that there is a failure.
[0014]
A molded product inspection apparatus according to a third aspect of the present invention is an inspection device for inspecting the shape of an inspected molded product (S) having an annular shape, and is a circuit for attaching and rotating the inspected molded product (S). An imaging camera having an image sensor (4) arranged in the direction tangential to the outer peripheral surface of the moving product (6) and the inspected molded product (S) attached to the rotating device (6), and having an image sensor (4) (2), an illuminating device (9) disposed on the opposite side of the photographing camera (2) and irradiating the outer peripheral surface of the inspected molded product (S) toward the photographing camera (2), and the photographing camera (2) An arithmetic processing unit (24) for calculating an outer peripheral surface shape of the inspected molded product (S) by arithmetically processing an input photoelectric conversion signal, and the arithmetic processing unit (24) of the inspected molded product (S). The boundary position (X1) of the outline that passes through the center line of the cross section is obtained, and the one side that is orthogonal to the center line A position where the half contour of the shape and the entire peripheral contour of the inspected molded product (S) corresponding to the half contour are aligned at the same position is obtained as a first virtual boundary position (Y), and the center line The second virtual boundary position (Z) is a position that intersects the center line with the half contour of the outer shape on the other side orthogonal to the entire contour of the inspected molded product (S) corresponding to the half contour at the same position. The first distance (L1) from the boundary position (X1) to the first virtual boundary position (Y) and the second distance (L2) from the boundary position (X1) to the second virtual boundary position (Z) Subtract the value of the second distance (L2) or the first distance (L1) close to the boundary position (X1) from the value of the first distance (L1) or the second distance (L2) far from the boundary position (X1) When the number is outside the set value range, it is determined as defective and the result determined is the control unit (31) of the sorter (31). 5) is intended to output to.
[0015]
According to a fourth aspect of the present invention, there is provided an apparatus for inspecting a molded product, wherein the first distance (L1) and the second distance (L2) are determined at a plurality of locations along the peripheral surface of the molded product to be inspected. A value smaller than the second distance (L2) is determined as a burr (B), and when the maximum length of the burr (B) is larger than a set value, it is determined as a second rank defect.
[0016]
A molded product inspection apparatus according to a fifth aspect of the present invention is an inspection device for inspecting the shape of an inspected molded product (S) having an annular shape. An imaging camera (6) having a moving device (6) and an image sensor (4) arranged from the center axis direction of the inspected molded product (S) attached to the rotating device (6) toward the inner peripheral surface. 2), an illuminating device (9) disposed on the opposite side of the photographing camera (2) and irradiating the inner peripheral surface of the inspected molded product (S) toward the photographing camera (2), and the photographing camera (2) And an arithmetic processing unit (24) for determining the inner peripheral surface shape of the inspected molded product (S) by arithmetically processing the input photoelectric conversion signal, and the arithmetic processing unit (24) is inspected molded product (S). Add the radius of the inner peripheral surface to the vertical line passing through the center of the imaginary line that connects the boundary positions of the two inner peripheral surfaces of the center position ( 2) and a first distance (L3) from the center position (X2) to the first virtual boundary position (Y) that is the boundary of the inner peripheral surface is determined along the entire circumference, and from the center position (X2) Of the distance to the first virtual boundary position (Y), a second distance (L4) to the second virtual boundary position (Z) that is the boundary of the inner peripheral surface of the abnormally deformed portion is obtained, and the first distance (X1 ) And the second distance (X2) are larger than the set value, it is determined as defective.
[0017]
A method for inspecting a molded product according to a sixth aspect of the present invention is an inspection method for inspecting the shape of an inspected molded product (S) having an annular shape, and the rotational molding device (6) The peripheral surface of the molded product to be inspected (S) is photographed by a photographing camera (4) having an image sensor (4) while being rotated at the same time, and the light photographed by the photographing camera (4) is converted into a photoelectric conversion signal, and an arithmetic processing unit (24), the arithmetic processing unit (24) obtains the boundary position (X1) of the outer shape of the inspected molded product (S), and the cross-sectional contour of the inspected molded product (S) and the inspected molded product (S ) With respect to the center line passing through the center of the cross section of the cross section of the outer shape on one side perpendicular to the center line, the position intersecting the center line is determined as the first virtual boundary position (Y), Next, with respect to the center line passing through the cross-sectional contour of the inspected molded product (S) and the center of the cross-section of the inspected molded product (S) A second virtual boundary position (Z) is obtained by aligning the half contour of the other outer shape orthogonal to the center line at the same position and intersecting the center line, and the first virtual boundary position from the boundary position (X1) A first distance (L1) to (Y) is obtained, a second distance (L2) from the boundary position (X1) to the second virtual boundary position (Z) is obtained, and a distance (L1) close to the boundary position (X) is obtained. Alternatively, the corresponding set value is compared with the corresponding set value previously inputted by the maximum value of the value obtained by subtracting the value of the near distance (L1 or L2) from the value of L2) and the distance (L2 or L1) far away. When it is larger, it is determined as a defective product.
[0018]
According to the method for inspecting a molded article of the present invention according to claim 7, the value of the first distance (L1) or the second distance (L2) close to the boundary position (X) is determined as the length of the burr (B), When the length of B) is larger than the corresponding contact value compared with the corresponding set value, it is determined as the second rank defect.
[0019]
[Action]
The molded product inspection apparatus according to claim 1 of the present invention rotates the rotating device (6) for attaching and rotating the inspected molded product (S), and is inspected attached to the rotating device (6). The molded product (S) is photographed by a photographing camera (2) which is arranged in the axial direction of the inner peripheral surface or the tangential direction of the outer peripheral surface and has an image sensor (4). This photographing camera (2) is arranged on the opposite side, and the light of the illumination device (24) that irradiates the inner peripheral surface or outer peripheral surface of the molded product (S) to the photographing camera side with the light of the molded product (S) to be examined. Bright and dark areas due to transmission and non-transmission are obtained from the amount of change in brightness. Then, the photoelectric conversion signal input from the photographing camera (2) is arithmetically processed by the arithmetic processing unit (24) to determine the inner peripheral surface or outer peripheral surface shape of the inspected molded product (S). At the time of this determination, a reference position (X) serving as a reference for the inspected molded product (S) is obtained and a distance from the reference position (X) is measured, and the measured dimension data and input to the arithmetic processing unit (24). It is calculated by comparing with the set value of the set data, and when it is out of the set value range, it is determined as defective. Since this determination is performed by determining the reference position (X) and measuring the dimensions from the reference position, it is possible to accurately determine the defect.
[0020]
According to a second aspect of the present invention, there is provided a molded product inspection apparatus comprising: a rotation device (6) for rotating a workpiece to be inspected (S); and a rotation device (6) for rotating the rotation device (6). The outer peripheral surface of the molded product (S) is photographed by a photographing camera (2) which is arranged in a tangential direction of the outer peripheral surface and has an image sensor (4). The photographing camera (2) is disposed on the opposite side, and the illuminating device (24) irradiates the outer peripheral surface of the inspected molded product (S) to the photographing camera side. The area of light and dark due to is determined by the amount of change in brightness. Then, the photoelectric conversion signal input from the photographing camera (2) is arithmetically processed by the arithmetic processing unit (24) to determine the outer peripheral shape of the inspected molded product (S). At the time of this determination, data from the setter (25) stored in advance with the set value to be output to the arithmetic processing unit (24) is inputted and compared. This contrast is obtained by calculating a boundary position (X1) of the outer shape passing through the center line of the cross section of the inspected molded product (S) by the arithmetic processing unit (24), and a half contour of the outer shape on one side orthogonal to the center line. The half contour of the outer shape on the other side that is perpendicular to the center line is obtained as a first virtual boundary position (Y) by aligning the entire contour of the molded article (S) to be inspected with the same position and intersecting the center line. And the entire circumference of the molded article (S) to be inspected are aligned at the same position, and a position intersecting the center line is obtained as a second virtual boundary position (Z). A first distance (L1) from the boundary position (X1) to the first virtual boundary position (Y), a second distance (L2) from the boundary position (X1) to the second virtual boundary position (Z), and Each of the maximum values is compared with each corresponding set value input in advance, and when the first distance (L1) and the second distance (L2) are out of the range of each corresponding set value, it is determined as defective.
[0021]
In this case, the arithmetic processing unit determines that the maximum sum of the burrs (S) from the boundary position (X) of the inspected molded product (S) and the defective deformation part (D) due to mold deviation is greater than the set value of the inspection standard. If it is larger, it is regarded as a defective product. This is because, without being limited to the burr (S) and the defectively deformed portion (D), if the sum of both exceeds the inspection standard, for example, an O-ring affects the sealing ability.
[0022]
According to a third aspect of the present invention, there is provided a molded product inspection apparatus in which an outer peripheral surface of a molded product to be inspected is photographed with a photographing camera having an image sensor while the molded product to be inspected is attached to a rotating device and rotated. Data is converted into a photoelectric conversion signal. The photoelectric conversion signal is arithmetically processed by an arithmetic processing unit to determine the outer peripheral surface shape of the inspected molded product. This determination is performed by obtaining the boundary position (X1) of the outer shape passing through the center line of the cross section of the inspected molded product (S) by the arithmetic processing unit (24) and the half contour of the outer shape on one side orthogonal to the center line and the object to be inspected. A position where the entire contour of the molded product (S) is aligned at the same position and intersects the center line is obtained as a first virtual boundary position (Y), and the other half contour of the other side orthogonal to the center line A position intersecting the center line with the entire circumference contour of the inspection molded product (S) is obtained as the second virtual boundary position (X1). The first distance (L1) from the boundary position (X1) to the first virtual boundary position (Y) and the second distance (L2) from the boundary position (X1) to the second virtual boundary position (Z) And the value of the second distance (L2) or the first distance (L1) close to the boundary position (X1) from the value of the first distance (L1) or the second distance (L2) far from the boundary position (X1) When the subtracted number is larger than the set value, it is judged as defective.
[0023]
This is to first inspect for misalignment. For example, when the molded product to be inspected (S) is an O-ring, it is a molding defect caused by misalignment of the split surfaces that greatly affects the sealing ability. And when a burr | flash (B) is small, it does not become a big problem as a sealing capability rather than a mold shift defect. For this reason, first, a mold misalignment defect is inspected, and then a burr defect is inspected. Then, if there is a mold misalignment defect, it is not necessary to inspect the burr defect, and the molded product to be inspected (S) is rejected.
Since this misalignment is a fundamental problem as a sealing capability, the determination result is input to the control unit (15) of the sorting machine (31), which is a subsequent process, to select a good product and a defective product.
[0024]
The molded product inspection apparatus according to the fourth aspect of the present invention obtains the first distance (L1) and the second distance (L2) along the peripheral surface of the molded product to be inspected, and the first distance (L1). A small value is compared with the second distance (L2), and a burr (B) is determined. The burrs (B) are determined according to the second order of defects. This is a case where the burr (B) cannot be overlooked as a function defect.
[0025]
According to a fifth aspect of the present invention, there is provided an apparatus for inspecting a molded product of the present invention. The image is taken with a photographing camera (4) having In this photographing process, the light and darkness of the inspected molded product (S) that has received the light emitted from the illumination device (9) arranged on the opposite side is photographed by the photographing camera (4), and this light is converted into a photoelectric conversion signal. To the arithmetic processing unit (24). Then, the arithmetic processing unit (24) obtains the center position (X) as the measurement reference position from the vertical line passing through the center of the imaginary line connecting the two points of the boundary position of the inner peripheral surface of the inspected molded product (S). From this center position (X), the inner peripheral surface of the molded product (S) to be inspected is measured, along with the defect error of the inner diameter dimension, and the defects generated on the inner peripheral surface are measured. If it is outside, it is regarded as defective. For this reason, it becomes possible to measure a defect correctly.
[0026]
According to a sixth aspect of the present invention, there is provided a method for inspecting a molded product, wherein the outer peripheral surface of the molded product to be inspected (S) is rotated by the rotation device (20) while the image sensor (4) is used. Take a picture with the photo camera (4). The light photographed by the photographing camera (4) is converted into a photoelectric conversion signal and input to the arithmetic processing unit (24). Then, the arithmetic processing unit (24) obtains the boundary position (X1) of the outer shape of the inspected molded product (S), and the cross sectional contour of the inspected molded product (S) and the cross sectional center of the inspected molded product (S). A position intersecting with the center line is obtained as the first virtual boundary position (Y) by matching the half contour of the outer diameter on one side orthogonal to the center line with respect to the center line passing through the center line. Next, the cross-sectional contour of the inspected molded product (S) and the semi-contour of the outer shape on the other side perpendicular to the center line are aligned at the same position with respect to the center line passing through the cross-sectional center of the inspected molded product (S). The position that intersects the line is determined as the second virtual boundary position (Z). Then, the first distance (L1) from the boundary position (X) to the first virtual boundary position (Y) is obtained, and further the second distance from the boundary position (X) to the second virtual boundary position (Z). (L1) is obtained. Further, the maximum values of the value obtained by subtracting the value of the near distance (L1 or L2) from the value of the near distance (L1 or L2) from the boundary position (X) and the value of the near distance (L1 or L2) are input in advance. If it is out of the range of the corresponding setting value compared with the corresponding setting value, it is determined as a defective product.
[0027]
An inspection reference value is input as a set value to the setting device (25), and the size of the defective deformed portion is large by comparing the data of the inspection reference value with the size of the defective deformed portion (D) due to misalignment. In this case, it is a method for determining a defective product.
[0028]
According to the method for inspecting a molded article of the present invention according to claim 7, the value of the first distance (L1) or the second distance (L2) close to the boundary position (X) is determined as the length of the burr (B), This is an inspection method in which when the length of B) is larger than the corresponding contact value compared with the corresponding set value, the defect is calculated by the second rank. In this case, the inspection is performed in consideration of the size of the burr (B).
[0029]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings of an inspection apparatus for a molding machine.
[0030]
FIG. 1 is a side view of an inspection apparatus for a molding machine showing an embodiment of the present invention. FIG. 2 is a plan view of FIG.
1 and 2, reference numeral 1 denotes an inspection apparatus. The inspection device 1 includes a photographing camera 2, an illumination device 9, a rotation device 6, an arithmetic processing device 24, and a display device 19. S is a molded product to be inspected. This to-be-inspected molded product S shows the side surface of an O-ring as an example.
[0031]
First, the inspected molded product S will be described.
The free-form O-ring S of the molded article to be inspected shown in FIG. 3 is made of a rubber material, and the cross-section is formed in an O-shape so that the whole has an annular shape. Since this O-ring S is attached as shown in FIG. 3, if there is a burr B on the outer peripheral surface or a defectively deformed portion D on the circumferential surface of the cross section, the sealing ability is lowered. For this reason, it is necessary to inspect the outer surface of the O-ring S.
[0032]
The O-ring S shown in FIG. 4 is formed by forming a step-like defective deformed portion D on the outer peripheral surface due to mold displacement between the upper mold and the lower mold during molding. Further, burrs B are irregularly formed on the outer peripheral surface of the defective deformation portion D on the outer peripheral surface. These are defective products, and may be caused by wear of the split surface of the mold, clamping force, variation in injection pressure, and the like. In the production of the O-ring S, it is necessary to prevent a product formed as a defective product from being mixed with a good product. For this reason, such defective products must be inspected and removed.
[0033]
The O-ring S is attached to the rotation device 6 of the inspection device 1 and rotates together with the rotation device 6 as shown in FIG. The O-ring S is fitted and attached to a shaft-shaped mounting jig 7 in which the inner diameter of the O-ring S provided in the rotating device 6 is fitted. The attachment jig 7 is rotatably provided on the rotation device 6 and is configured to be rotated by a motor. A motor that rotates continuously or that rotates intermittently is used.
[0034]
On the other hand, the photographing camera 2 and the lighting device 9 are attached to the outer peripheral surface of the O-ring S in a linear positional relationship as shown in FIG. As shown in FIGS. 2 and 5, the photographing camera 2 receives light emitted from the illumination device 9 through the outer peripheral surface of the O-ring S, and the portion of the photographed image blocked by the O-ring. The change in the amount of light between the dark dark light amount and the bright light amount transmitted without being blocked by the O-ring is received. The received light is photoelectrically converted and input to the arithmetic processing unit 24, and the calculation result is displayed on the display device 19. Note that the O-ring S in FIG. 5 has a circular cross section and no burrs B or defective deformation portions D are recognized. In contrast to the one shown in FIG. 4, the determination result is a non-defective product. .
[0035]
FIG. 6 shows the configuration of the photographing camera 2 and the arithmetic processing unit 24.
In FIG. 6, an O-ring S that is a molded product to be inspected becomes a subject and is photographed by the photographing camera 2. The photographing camera 2 has a configuration in which a lens 3 and an area sensor 4 are arranged behind the lens 3. Further, a CCD for converting the white and black light reception signals of the area sensor 4 into electrical signals is provided. As one configuration of the area sensor 4, a horizontal scanning circuit 10 and a vertical scanning circuit 11 as shown in FIG.
[0036]
Light projected onto the area sensor 4 through the two scanning circuits 10 and 11 hits the photoelectric conversion element of the transducer, and charges are accumulated. The accumulated amount of charge is determined by the intensity of light and the irradiation time. Further, the electric charge accumulated by the light is sequentially transmitted from the signal line by current or voltage.
[0037]
Since the burr B and defective deformation portion D of the O-ring S are accurately confirmed between the elements of the area sensor 4, the number of current or voltage pulses sent from the signal line can be counted to It is possible to measure the external dimensions of the image that is hit.
[0038]
The end signal 12 is a signal that informs the end of the measurement. As a signal type, a measurement start signal related to exposure time, a clock pulse for changing a parallel signal into a serial signal, a video signal from a photoelectric element, and the like are transmitted.
[0039]
These signals are transmitted to the arithmetic processing unit 24. Since this signal indicates the number of sensor signals that are exposed to light, the shape of the photoelectric image is determined by multiplying the sensor interval, and divided by the magnification to determine what type of burrs S and defects An arithmetic process is performed to determine whether or not the deformed portion D exists.
[0040]
Further, what is processed by the arithmetic processing unit 24 so that the operator can see it is transmitted to the display circuit unit 17 so that the display circuit unit 17 can visually determine the external state of the O-ring. Yes. That is, the quality of the O-ring S is determined via the arithmetic processing unit 24 or the display circuit unit 17.
[0041]
Data that determines the quality of the O-ring S is transmitted to the control unit 15 of the sorter 31 before the packaging process P, which is a subsequent process as shown in FIG. And the control part 15 controls the sorter 31 and classifies the quality of the O-ring S to be packaged, and prevents the defective O-ring from being mixed into the O-ring S to be packaged.
[0042]
Next, the arithmetic processing unit 24 will be briefly described. FIG. 8 shows the configuration of the arithmetic processing unit 24. The arithmetic processing unit 24 is composed of a CPU 240 and a memory unit 242 and a setting unit 25 for inputting necessary data. Then, the setting value of the burr B of the O-ring and the setting value of the defective deformation portion D, which are stored in advance, are input from the setting portion 25 via the I / O device 246.
The signal from the photographing camera 2 is converted to a digital signal by the A / DC 244 via the I / F 22 and can be input to the CPU. Further, the signal processed by the CPU 240 operates the control program stored in the memory unit 242 based on the data in the memory unit 242, and operates the control unit 15 of the digital format sorter 31 by the D / AC 243. Input via the interface circuit I / F 21.
[0043]
The O-ring S attached to the rotating device 6 of the inspection apparatus 1 shown in FIG. Then, it is processed from the arithmetic processing unit 24 to the display device 19 by the data signal obtained from the photographing camera 2. FIG. 9 is a diagram for image processing for explaining the processing status.
[0044]
FIG. 9 is an enlarged view showing the burr B and the defective deformed portion D of the O-ring S of FIG. In FIG. 9, the boundary position X1 of the outer shape passing through the radial center line of the O-ring S corresponds to the outer end of the burr B.
[0045]
Next, as shown in FIG. 10, a circle having a dimension indicating a diameter of a cross section according to data input to the CPU 242 or the setting unit 25 with respect to a semi-contour of an upper cross section perpendicular to the center line of the O-ring S illustrated in FIG. Align the entire contour of. A point at which the entire contour intersects with the center line is defined as a first virtual boundary position Y. Further, similarly, as shown in FIG. 11, the point where the circular outline of the designed dimension is aligned with the semi-contour of the semicircular cross section at the lower side of the center and the intersection with the center line is defined as the second imaginary point. The boundary position Z is assumed.
[0046]
A distance from the boundary position X to the first virtual boundary position Y is defined as a first distance L1.
Further, the distance from the boundary position X to the second boundary position Z is defined as a second distance L2. At this time, the short distance Lb of the first distance L1 or the second distance L2 from the boundary position X is the length dimension of the burr S. Further, the dimension obtained by subtracting the distance (burr length) Lb close to the boundary position X from the dimension of the distance (defect length) Lx far from the boundary position X becomes the distance dimension Ld of the defective deformed portion D due to the misalignment. This measurement location may be measured for the entire circumference of the O-ring S, measured at a plurality of locations on the entire circumference, or measured at one location. Of these, when measuring the entire circumference or a plurality of locations, the dimensions of the dimensions L1 and L2 change to large on both sides of the center point of the center line. Or there is a part which does not change. Therefore, the quality of the defective product is determined by comparing with the allowable dimension when the maximum value of the burr length dimension Lb and the distance dimension Ld of the defective deformed portion D is designed. In these arithmetic processes, light from the photographing camera 2 is converted into a photoelectric conversion signal, and the arithmetic processing unit 24 performs the arithmetic process.
[0047]
The allowable dimensions of the above-described burr length dimension Lb and the distance dimension Ld of the defective deformed portion D are set, for example, according to ISO 3601S grade standards. Or, it may be determined by an in-house standard determined as a range where there is no problem in function as a result of the experiment. For example, in the case of an O-ring, the burr length dimension Lb and the distance dimension Ld of the defective deformation portion D of the mold shift are variously determined in accordance with the size of the wire diameter d of the O-ring S. As an example, the burr length Lb is 0.10 mm with respect to the wire diameter d of 1.8 to 2.65 mm, the distance Ld of the defective deformed portion D is 0.08 mm, and the middle is omitted. From 30 to 7.00 mm, Lb is set to 0.15 mm and Ld is set to 0.13 mm.
[0048]
The size of the defect formed on the surface of the O-ring S is determined by various methods as follows.
First, the first case is determined by only the distance dimension Ld of the defective deformed portion D due to misalignment. This is because the distance dimension Ld of the defectively deformed portion D is always a problem even when the burr length dimension Lb is hardly a functional problem as a defective portion. That is, if the distance dimension Ld value of the defective deformed portion D is equal to or greater than the set value, it is determined as defective.
[0049]
Second, in consideration of the occurrence of defects due to the generation of burrs B, the sum of the burr length dimension Lb and the distance dimension Ld of the defectively deformed portion is used as the defect size. In this case, if the total value of the burr length dimension Lb and the distance dimension Ld of the defective deformed portion is larger than the set value, it is determined as defective. In this case, there is an advantage that the inspection method can be simplified by measuring the whole when the size of the defective portion is small.
[0050]
Thirdly, the burr length dimension Lb and the distance dimension Ld of the defective deformed portion are respectively measured, and the measured values Lb and Ld are compared with the set values at which the defect is determined to determine whether the defect is good or bad. In this method, it is possible to select the reliability and simplification that can be switched to the above-described first or second method when the occurrence of burrs B is hardly observed during the inspection measurement. The determination of the burr length dimension Lb of the burr S is made in the order of determining the defective deformation portion as the first place and then determining the burr length dimension Lb when performing the arithmetic processing.
[0051]
Next, an inspection method for the inspected molded product S will be described.
[0052]
FIG. 12 is a flowchart of the inspection procedure in the image processing of the inspection apparatus 1. An O-ring S, which is a molded product to be inspected, is fitted and attached to the mounting jig 7 of the rotating device 6. Next, the illumination device 9 irradiates the photographing camera 2 so as to image the outer peripheral surface of the O-ring S. Then, in the image processing unit including the arithmetic processing unit 24, the amount of change in brightness between the dark region where the light is blocked by the O-ring S and the bright region where the light has passed is photoelectrically calculated on the image captured by the photographing camera 2. Obtained as a converted signal (step 1).
A position where the amount of change in brightness changes from 1/3 to 2/3, or preferably 1/2, is obtained as the boundary position X1 of the burr B (step 2).
[0053]
A circle is superimposed on the contour of the upper cross section in the figure orthogonal to the center line of the cross section in the radial direction of the O-ring S, and the lower circle in the figure is used as a virtual line. And the point which cross | intersects a centerline is calculated | required as the 1st virtual boundary position Y (process 3).
[0054]
In the same manner as described above, a circular shape is overlapped with the outline of the lower cross section in the figure orthogonal to the center line of the cross section in the radial direction of the O-ring S, and the lower circle in the figure is used as a virtual line. And the point which cross | intersects a center line is calculated | required as the 2nd virtual boundary position Z (process 4).
[0055]
Then, the distance from the boundary position X to the near virtual boundary position Y or Z is obtained as the burr length dimension Lb by the arithmetic processing unit 24 (step 5).
Next, the distance dimension Lx from the boundary position X to the virtual boundary position Z or Y is obtained, and the distance of the defective deformed portion formed by misalignment is obtained by subtracting the burr length dimension Lb from the far distance dimension Lx. Obtained as dimension Ld (step 6).
[0056]
When the distance dimension Ld of D of the defective deformed portion exceeds the above-described allowable set value stored in the setting unit 25 of the arithmetic processing unit 24, it is determined as defective. When a plurality of defective deformation portions D are measured along the circumference, the maximum value of the distance dimension Ld is used as a determination criterion. Further, when the length Lb of the flash B is measured as the defect determination, it is determined as the second place after determining the defect deformed portion D. Therefore, if the length of the defective deformation portion D is determined to be defective, the length of the flash B is not determined, and the defective product is a defective product (step 7).
[0057]
As described above, the inspection and determination method for determining the first virtual boundary position Y and the second virtual boundary position Z can accurately measure even a minute and unclear shape such as a defective deformed portion D caused by misalignment. Can be judged. Further, it is possible to accurately determine whether or not the length Lb of the beam B is a length causing a problem in terms of function.
Furthermore, the determined data is output to the control unit 15 of the sorter 31, and it is possible to effectively prevent a defective product from being mixed into a non-defective product.
[0058]
FIG. 13 is a plan view relating to a molded product inspection apparatus showing a second embodiment of the present invention.
In FIG. 13, the inspection device 1 is provided with a rotation device 6, and an attachment jig 7 is attached to the rotation device 6 via a joint 27. A plurality of circular concave grooves are formed on the peripheral surface of the attachment jig 7 along the axial direction to constitute an attachment portion 8. Then, an O-ring S is attached to the plurality of attachment portions 8 according to the plurality of attachment portions 8.
[0059]
The plurality of O-rings S are disposed between the photographing camera 2 and the illumination device 9. The O-ring S rotated by the motor 26 of the rotating device 6 is measured and inspected by the photographing camera 2. The photographing camera 2 and the illumination device 9 are configured in the same manner as in the first embodiment. The photographing camera 2 is configured to be guided intermittently by the rail 5 and to move intermittently according to the arrangement interval of the O-rings S. Reference numeral 35 denotes a diffusion plate of the lighting device.
[0060]
The photographing camera 2 is guided intermittently by the rail 5 and moves intermittently, and photographs and inspects the O-rings S one by one. For attaching the O-ring for this photographing, the handling 34 arranged on the right side of the mounting jig 7 chucks the O-ring S and moves to the mounting jig 7, and the O-ring S is fitted to each mounting portion 8. Install. When the inspection of the O-ring is completed, the robot is removed one by one by the robot separation device 13 and conveyed to the packaging process P by the shooter 30.
[0061]
The packaging process P side of the lowering of the shooter 30 is divided into a first shooter 32 for the packaging process P and a second shooter 33 for the defective product box. The control unit 15 that has received the pass / fail determination signal from the arithmetic processing unit 24 switches the switching plate 36 to switch the non-defective product of the O-ring to the first shooter 32 so that it can move to the packaging process P side. On the contrary, the defective product is switched so as to move to the second shooter 33 so that it can be put into the defective box.
[0062]
The O-ring pass / fail determination signal determined by the arithmetic processing unit 24 is communicated to the molding process transmitting unit 40 and the arithmetic processing unit 24 so as to be fed back to the molding machine. The molding process transmitting unit 40 controls a molding pressure or a clamping force by a control unit 15a (not shown).
[0063]
FIG. 14 is a side view of a molded product inspection apparatus showing a third embodiment according to the present invention.
In FIG. 14, each component is substantially the same as that shown in FIG. The difference is that the illumination devices 9 facing the photographing camera 2 provided with a line sensor or an area sensor are arranged on both sides of the oil seal S in the illustrated axial direction. The rotating plate 6a of the rotating device 6 is formed of a transparent material such as a glass plate or an acrylic plate. The rotating plate 6a is configured such that the oil seal S can be projected through the irradiation light from the illumination device 6. In the third embodiment, the image sensor of the photographing camera 2 can be a line sensor or an area sensor.
[0064]
The inspected molded product S to be inspected by this inspection apparatus, that is, the oil seal is provided with a lip for sealing the shaft member on the inner peripheral surface. This lip is processed with a female finish cut. For this reason, a molding defect, a circular defect due to a knife cut, and a defect defect generated inside during molding appear on the finished surface by finishing.
[0065]
FIG. 15 is a photographed image of the inner peripheral surface of the lip portion of the oil seal S photographed by the photographing camera 2 in FIG. The right side of FIG. 15 is a photographed image with an enlarged field of view.
[0066]
16 obtains another boundary point b2 in the horizontal direction from an arbitrary boundary point b1 on the inner peripheral surface of the oil seal S in FIG. 15, and draws a virtual line. A center point p having a length of an imaginary line k connecting the boundary points b1 and b2 is obtained, a vertical line is drawn from the center point p, and a radius first distance L3 from the intersection of the boundary point b3 on the inner peripheral surface. To determine the center position X2. X2 in FIG. 17 is the obtained center position. The oil seal S is rotated by the rotation device 6 around the center position X2, and the first virtual boundary position Y of the inner peripheral surface is set over the entire circumference, for example, within a range of 0.1 degree to 1 degree. The first distance L3 is measured as L3a, L3b, L3c,... For each angle θ. This measurement is performed for each section as shown in FIG.
[0067]
The measurement of the inner peripheral surface is preferably divided into sections of 10 degrees to 30 degrees, for example, 24 degrees over the entire circumference, and the maximum of the first distance L3 from the center position X2 to the first virtual boundary position Y in the section. The roundness of the lip is determined by obtaining the value (L3max) and the minimum value (L3min). Further, as shown in FIG. 19, the second distance L4 to the second virtual boundary position Z that is the maximum value (L4max) of the second distance L4 formed by the defective portion K is obtained and input to the arithmetic processing unit 24. It is determined whether or not the defective portion K is defective in comparison with the set values corresponding to each.
Further, a first distance L3 from the center position X2 to the first virtual boundary position Y and a second distance L4 to the second virtual boundary position Z, which is the defective portion K, are obtained. Alternatively, the dimension T of the difference defect portion obtained by subtracting the first distance L3 from the second distance L4 is obtained. Then, the distance L3, L4 or the value T of the defect portion thus obtained is compared with the set value input to the arithmetic processing unit 24, and when it is out of the set value range, the defect portion K is regarded as defective. judge. Since the processing configuration in the arithmetic processing unit 24 is the same as that of the first embodiment of the present invention, the description thereof is omitted.
[0068]
FIG. 20 is a process flowchart of the image processing process.
In FIG. 20, in step 1, the amount of change in the light / dark region of the oil seal S is determined by the transmission and non-transmission of light in the configuration of the photographing camera 2 and the illumination device 9.
In step 2, the position at which this light change amount is changed from 1/3 to 2/3, preferably 1/2 is set as a boundary point b.
In step 3, another boundary point b2 is obtained from this boundary point b1, and a distance of an imaginary line k connecting both boundary points b1 and b2 is obtained.
Then, in step 4, the horizontal center point p of the virtual line k is obtained.
In step 5, a vertical line passing through the center point is drawn with respect to the imaginary line k, and the center position X2 is obtained by adding the radius value of the inner diameter of the oil seal S from the boundary point p3 of the vertical line.
[0069]
In step 6, the first distance L3 from the center position X2 to the boundary point b3 is determined for every set angle and L3a, L3b, L3c and the entire circumference.
Step 7 is divided into sections of 10 degrees to 30 degrees along the entire circumference of the inner peripheral surface of the oil seal S, and the first virtual boundary position Y and the defect portion K that are points of the first distance L3 in the section. The second virtual boundary position Z of the second distance L4 generated by the above is obtained. Alternatively, the size of the defect portion K is obtained by subtracting the first distance L3 from the second distance L4.
In step 8, when the distances L3 and L4 obtained in step 7 or the difference T is compared with the set value of the arithmetic processing unit 24 and is out of the set value range, it is determined as defective. This process is repeated for each molded product.
[0070]
FIG. 19 is a photographed image obtained by measuring the defective portion K. The dimension T of the defect portion, which is the difference between the first distance L1 and the second distance L2 from the center position X2, is obtained, and when this dimension T is larger than the preset input value, the defect portion K exists. Then, it is the determined part.
[0071]
As described above, the reference position X of the boundary position X1 or the center position X2 is obtained, and the distances L1 and L2 from the reference position X to the virtual boundary positions Y and Z are measured, and the measured values are input in advance. It is possible to determine a defective product or the like by performing a comparison operation with the set value.
[0072]
As described above, the inspection apparatus according to the present invention accurately confirms the position by the virtual boundary position even if the defective deformed portion D, the defective portion K, the burr B, etc. are not clearly displayed on the peripheral surface of the molded product. It becomes possible to judge. In addition, since the determination can be made from an important portion of the defective portion by this inspection method, there is no erroneous determination, and the inspection can be simplified.
[0073]
【The invention's effect】
The molded product inspection apparatus of the present invention obtains a reference position to be measured by the molded product, obtains each distance from the reference position to the first virtual boundary position and the second virtual boundary position, and sets value data; By comparing, it is possible to determine the quality of the burrs, defective portions, and defective deformed portions. In particular, it can be expected that even a small deformed portion can be accurately inspected for quality by measurement determined from the reference position.
[0074]
Further, in conventional image processing, it is very difficult to determine a defective part by displaying only in black and white, but it is possible to measure with high accuracy by measuring the defective part from the reference position.
[0075]
Furthermore, if there is a defect in an important place determined in the order of importance, the subsequent determination can be omitted to improve the efficiency of the inspection.
[0076]
Further, the procedure of the inspection method becomes easy, and it becomes possible to accurately find the defective part. Moreover, it can be expected to improve the efficiency of inspection. Furthermore, since the defect portions are measured in the order of importance, it is possible to check and determine the details as necessary.
[Brief description of the drawings]
FIG. 1 is a side view of a molded product inspection apparatus showing an embodiment according to the present invention.
2 is a plan view of FIG. 1. FIG.
FIG. 3 is an attachment state diagram of an inspected molded product used in the inspection apparatus of the present invention.
FIG. 4 is a cross-sectional view of a defective molded product used in the inspection apparatus of the present invention.
FIG. 5 is a projection view in which an inspected molded product is image-processed by the inspection apparatus of the present invention.
6 is a configuration diagram of an operation circuit for the arithmetic processing device from the photographing camera of FIG. 1; FIG.
FIG. 7 is a cross-sectional view of horizontal scanning in image processing according to the present invention.
8 is a configuration diagram of an arithmetic processing unit in FIG. 1. FIG.
FIG. 9 is a projected cross-sectional view showing a method for processing a defective portion of an inspected molded product according to the present invention.
10 is a projection view for inspecting and measuring the first virtual boundary position in FIG. 9;
11 is a projection view for inspecting and measuring the second virtual boundary position in FIG. 2;
FIG. 12 is a flowchart of an inspection procedure related to image processing according to the present invention.
FIG. 13 is a plan view of a molded product inspection apparatus showing a second embodiment according to the present invention.
FIG. 14 is a side view of a molded product inspection apparatus showing a third embodiment according to the present invention.
FIG. 15 is a plan projection view obtained by performing image processing on an inspected molded product with the inspection apparatus of FIG. 14;
16 is a planar projection view for obtaining a center point p for the inspection process in FIG. 15;
17 is a plan projection view for obtaining the center position X2 for the inspection process in FIG.
18 is a plan projection view for obtaining the first distance L3 for each angle along the circumference for the inspection processing in FIG.
FIG. 19 is a plan projection view for determining a defective portion by obtaining a first distance L3 and a second distance L4 for the inspection process in FIG. 15;
FIG. 20 is a flowchart of an inspection procedure related to image processing according to the present invention.
FIG. 21 is a side view of a conventional inspection machine.
22 is an image processing diagram in which an O-ring is inspected by the inspection machine in FIG. 20;
[Explanation of symbols]
1 Inspection device
2 Camera
3 Lens
4 Image sensor
5 rails
6 Rotating device
7 Mounting jig
8 Mounting part
9 Lighting equipment
10 Horizontal scanning circuit
11 Vertical scanning circuit
12 End signal
13 Detachment device
15 Control unit
15a Control unit
17 Display circuit
19 Display device
21 I / F
22 I / F
24 arithmetic processing unit
240 CPU
242 Memory unit
243 D / AC
244 A / DC
246 I / O device
25 Setting section
26 Motor
27 Fitting
30 Shuta
31 sorter
32 First Shooter
33 Second Shooter
34 Handling
35 Diffuser
36 switching board
40 Molding process transmitter
D Defect deformation part
K defective part
L1 1st distance
L2 Second distance
L3 1st distance
L4 2nd distance
Lb Close distance (burr length)
Ld Distance dimension (distance dimension of defective deformation part)
Lx distance
P Packaging process
S Bali
T Dimension of defect
X Reference position
X1 boundary position
X2 center position
Y First virtual boundary position
Z second virtual boundary position
b Boundary point
b1 boundary point
b2 boundary point
b3 boundary point
k Virtual line
p Center point
65 spot illuminator
70 Bali inspection machine
71 Camera
72 computers
73 Display screen
80 conveyor

Claims (7)

An inspection device for inspecting the shape of a ring-shaped inspected molded product (S), the rotating device (6) for attaching and rotating the inspected molded product (S), and the rotating device (6) A photographing camera (2) which is disposed from the radial direction to the outer peripheral surface or from the axial direction to the inner peripheral surface of the molded article to be inspected (S) attached to the camera and has an image sensor (4); An illuminating device (9) which is arranged on the opposite side of (2) and irradiates the outer peripheral surface or inner peripheral surface of the inspected molded product (S) toward the photographing camera (2), and the photographing camera (2) An arithmetic processing unit (24) for determining an outer peripheral surface shape or an inner peripheral surface shape of the inspected molded product (S) by performing arithmetic processing on an input photoelectric conversion signal, and the arithmetic processing unit (24) Boundary position of the outer shape passing through the radial center line of the cross section of the molded article (S) to be inspected ( 1) or obtaining a reference position (X) which is a center position (X2) of the axis of the inspected molded product (S) and determining an inspection position of the inspected molded product (S) from the reference position (X). Obtained as a first virtual boundary position (Y) and a position that is different from the reference position (X) and the size of the first virtual boundary position (Y) as a second virtual boundary position (Z), A first distance (L1, L3) from a reference position (X) to the first virtual boundary position (Y) and a second distance from the reference position (X) to the second virtual boundary position (Z) ( L2 and L4) are determined, and when each value of the first distance (L1, L3) or the second distance (L2, L4) is out of the set value range, it is determined as defective. . An inspection device for inspecting the shape of a ring-shaped inspected molded product (S), the rotating device (6) for attaching and rotating the inspected molded product (S), and the rotating device (6) A photographic camera (2) which is disposed toward the outer peripheral surface in a tangential direction of the outer peripheral surface of the inspected molded article (S) attached to the camera and has an image sensor (4), and the photographic camera (2) An illuminating device (9) that is disposed on the opposite side and irradiates the outer peripheral surface of the inspected molded product (S) toward the photographing camera (2), and a photoelectric conversion signal input from the photographing camera (2) And an arithmetic processing unit (24) for determining the outer peripheral surface shape of the inspected molded product (S), and the arithmetic processing unit (13) passes through the center line of the cross section of the inspected molded product (S). Obtain the boundary position (X1) of the outer shape and The half-contour of the shape and the entire contour of the inspected molded product (S) corresponding to the half-contour are matched to the same position to obtain a position intersecting the center line as a first virtual boundary position (Y), In addition, a second position is defined by crossing the center line by matching the half contour of the outer shape on the other side orthogonal to the center line and the entire peripheral contour of the molding to be inspected (S) corresponding to the half contour at the same position. As a virtual boundary position (Z), a first distance (L1) from the boundary position (X1) to the first virtual boundary position (Y), and a second virtual boundary position ( Each maximum value of the second distance (L2) up to Z) is compared with each corresponding set value, and the first distance (L1) and the second distance (L2) are outside the range of each corresponding set value An apparatus for inspecting a molded product characterized in that it is determined to be defective. An inspection device for inspecting the shape of a ring-shaped inspected molded product (S), the rotating device (6) for attaching and rotating the inspected molded product (S), and the rotating device (6) A photographic camera (2) which is disposed toward the outer peripheral surface in a tangential direction of the outer peripheral surface of the inspected molded article (S) attached to the camera and has an image sensor (4), and the photographic camera (2) An illuminating device (9) that is disposed on the opposite side and irradiates the outer peripheral surface of the inspected molded product (S) toward the photographing camera (2), and a photoelectric conversion signal input from the photographing camera (2) And an arithmetic processing section (24) for determining the outer peripheral surface shape of the inspected molded article (S), and the arithmetic processing section (24) passes through the cross-sectional center line of the inspected molded article (S). Obtain the boundary position (X1) of the outer shape and The half-contour of the shape and the entire contour of the inspected molded product (S) corresponding to the half-contour are matched to the same position to obtain a position intersecting the center line as a first virtual boundary position (Y), In addition, a second position is defined by crossing the center line by matching the half contour of the outer shape on the other side orthogonal to the center line and the entire peripheral contour of the molding to be inspected (S) corresponding to the half contour at the same position. A first distance (L1) from the boundary position (X1) to the first virtual boundary position (Y) and the second virtual boundary position from the boundary position (X1) The second distance (L2) to (Z) is obtained, and the first distance (L1) far from the boundary position (X1) or the value of the second distance (L2) is close to the boundary position (X1). Set by subtracting the value of 2 distance (L2) or the first distance (L1) Defect and determined to moldings of the inspection apparatus and outputs control section (15) of the sorter (31) the result of the determination when outside the range of. The first distance (L1) and the second distance (L2) are obtained at a plurality of locations along the peripheral surface of the inspected molded product, and are smaller than the first distance (L1) and the second distance (L2). The molded product according to claim 2 or 3, wherein a value is determined as a burr (B), and when the maximum length of the burr (B) is larger than a set value, it is determined as a second rank defect. Inspection equipment. An inspection device for inspecting the shape of a ring-shaped inspected molded product (S), the rotating device (6) for attaching and rotating the inspected molded product (S), and the rotating device (6) The photographing camera (2), which is arranged from the center axis direction of the molded article (S) attached to the inner surface toward the inner peripheral surface and has an image sensor (4), and the photographing camera (2). An illuminating device (9) arranged on the side and irradiating the inner peripheral surface of the molded article (S) to be inspected to the photographing camera (2) side, and a photoelectric conversion signal input from the photographing camera (2) And an arithmetic processing unit (24) for determining an inner peripheral surface shape of the inspected molded product (S), and the arithmetic processing unit (24) is an inner peripheral surface 2 of the inspected molded product (S). The radius of the inner peripheral surface is added to the vertical line passing through the center of the virtual line (k) connecting the boundary point (b) of the points. The center position (X2) is obtained, and the first distance (L3) from the center position (X2) to the first virtual boundary position (Y) that is the boundary of the inner peripheral surface is obtained for each angle along the entire circumference. And a second distance (Z) to a second virtual boundary position (Z) that is a boundary of the inner peripheral surface of the abnormally deformed portion of the distance from the center position (X2) to the first virtual boundary position (Y). L4) is determined, and when the first distance (L3) and the second distance (L4) are out of a set value range, the molded product inspection apparatus is determined to be defective. An inspection method for inspecting the shape of a ring-shaped inspected molded product (S), wherein the external shape of the inspected molded product (S) is rotated while rotating the inspected molded product (S) with a rotating device (6). The surface is photographed by a photographing camera (4) having an image sensor (4), the light photographed by the photographing camera (4) is converted into a photoelectric conversion signal and input to the arithmetic processing unit (24), and the arithmetic processing unit ( 24) obtains the boundary position (X1) of the outer shape of the inspected molded article (S), and the center line passing through the contour of the cross section of the inspected molded article (S) and the cross sectional center of the inspected molded article (S). A position that intersects with the center line is determined as a first virtual boundary position (Y) by matching the half contour of the outer shape on one side orthogonal to the center line to the same position, and then the molding to be inspected The center line passing through the cross-sectional contour of the product (S) and the center of the cross-section of the inspected molded product (S) Then, a position intersecting with the center line is obtained as a second virtual boundary position (Z) by matching the half contour of the outer shape on the other side orthogonal to the center line to the same position, and from the boundary position (X1) Obtaining a first distance (L1) to the first virtual boundary position (Y), obtaining a second distance (L2) from the boundary position (X1) to the second virtual boundary position (Z), Each maximum value of the value obtained by subtracting the value of the near distance (L1 or L2) from the value of the near distance (L1 or L2) from the boundary position (X) and the value of the far distance (L2 or L1) is input in advance. A method for inspecting a molded product, characterized in that when it is larger than the corresponding set value in comparison with the corresponding set value, it is determined as a defective product. The value of the first distance (L1) or the second distance (L2) close to the boundary position (X) is determined as the length of the burr (B), and the length of the burr (B) is compared with the corresponding set value. The method for inspecting a molded product according to claim 6, wherein when it is larger than the corresponding contact value, the defect is determined as the second rank defect.

Images