JP6992276B2 - Inspection equipment for press-molded products - Google Patents

Description

The present invention relates to an inspection device for press-molded products.

The press-molded product is shaped by a pair of dies facing each other, and the shaped portion, for example, a streak-shaped groove becomes a flow path for gas or fluid. Therefore, the press-molded product is inspected for cracks and pinholes in the shaped part after pressing, and for this inspection, an inspection method is proposed in which the light emitted from a plurality of floodlight lamps is received by a plurality of CCD cameras. (For example, Patent Document 1).

JP-A-2002-365227.

By the way, the location and direction of cracks and pinholes are not uniform. Therefore, in order to improve the detection accuracy, it is necessary to adjust the equipment such as the direction, position, and angle of the floodlight lamp with respect to the press-molded product. The same applies to the CCD camera. For these reasons, there has been a demand for an inspection method that can improve the detection accuracy of cracks and pinholes in press-molded products and simplify the adjustment of equipment.

The present invention has been made to solve at least a part of the above-mentioned problems, and can be realized as the following forms. The first form is a form as an inspection device for a press-molded product formed by a pair of dies facing each other. This inspection device includes a light irradiation unit that irradiates light toward the press-molded product, and a light-receiving unit that faces the light irradiation unit with the press-molded product in between and receives the light emitted by the light irradiation unit. The light irradiation unit has a shape that follows the surface shape of the mold surface of one of the pair of molds, and the light receiving unit has a shape that follows the surface shape of the mold surface of one of the pair of molds. It has a structure that follows the surface shape of the mold surface. Further, the inspection device of the second embodiment has a light irradiation unit that irradiates light toward the press-molded product, and the light irradiation unit and the press-molded product are sandwiched between the light irradiation unit and the light irradiation unit. It consists of a light receiving part that receives light and a transmissive prism arranged between the press-molded product and the light-receiving part, and collects light incident from the press-molded product side to the light-receiving part. The light irradiation portion is provided with a portion, and the light irradiation portion has a shape that follows the surface shape of the mold surface of one of the pair of dies , and the side of the press-molded product of the prism is the pair of dies. It has a structure that follows the surface shape of the mold surface of the other mold of the mold .

(1) According to one embodiment of the present invention, an inspection device for a press-molded product is provided. This inspection device is an inspection device for a press-molded product shaped by a pair of dies facing each other, and is a light irradiation unit that irradiates light toward the press-molded product, and the light irradiation unit and the press-molded product. The light-irradiating portion and the light-receiving portion are provided with a light-receiving unit that faces the light-irradiating unit and receives the light emitted by the light-irradiating unit. It is said to have a shape that follows the surface shape of.

In the inspection device for press-molded products of this form, if the light-irradiated portion has a shape that follows the surface shape of the mold surface of one of the dies of a pair of dies, the light-irradiated portion has cracks or pinholes. It faces the entire shaping region of the press-molded product, including the region where it can occur. Therefore, even if cracks or pinholes occur in various shaping parts, light can be irradiated from the light irradiation part toward the cracks or pinholes, and at this time, it is necessary to adjust the equipment for the light irradiation part so much. do not do. Further, if the light receiving portion has a shape that follows the surface shape of the mold surface of one of the dies of the pair of dies, the light receiving portion is a press-molded product including a region where cracks and pinholes may occur. Facing over the entire shape area. Therefore, even if cracks or pinholes occur in various shaping parts, the light that has passed through the cracks or pinholes can be received by the light receiving portion, and at this time, it is not necessary to adjust the equipment for the light receiving portion so much. As a result, according to the inspection device for the press-molded product of this form, the detection accuracy of cracks, pinholes, etc. in the press-molded product can be improved, and the equipment adjustment can be simplified.

The present invention can be realized in various aspects. For example, it can be realized in the form of a press-molded product inspection method, or a press-molded product manufacturing method / manufacturing apparatus including mold molding of a press-molded product using a pair of facing dies and subsequent inspection. ..

It is explanatory drawing which shows the schematic structure of the press molding line including the inspection apparatus of the press molded article of 1st Embodiment. It is explanatory drawing which shows the part area A of the separator in FIG. 1 which is shown by being roughly enlarged. FIG. 3 is an explanatory view showing a cross-sectional view of the upper and lower dies and separators of the press section and the inspection section in the vertical plane along the 3-3 line in FIG. It is explanatory drawing which shows the state of the light irradiation from a light irradiation plate schematically. It is a process drawing which shows the outline of the manufacturing process of a separator in a press forming line. It is a process drawing which shows the outline of the procedure at the time of a separator inspection. It is explanatory drawing explaining the drive timing of various equipments corresponding to the stroke of the ram for driving a mold for separator inspection. It is explanatory drawing which shows the relationship between a mold and a separator in a separator inspection process, and the state of inspection. It is explanatory drawing which shows schematic of the inspection section of 2nd Embodiment. It is explanatory drawing which shows schematic the inspection section of 3rd Embodiment. It is explanatory drawing which shows schematic the inspection section of 4th Embodiment.

FIG. 1 is an explanatory diagram showing a schematic configuration of a press molding line 100 including an inspection device for a press molded product according to the first embodiment. The press molding line 100 is a line for press molding a separator Wsp of a fuel cell (not shown), and includes a press section 100P and an inspection section 100S. In the press section 100P, the first press section P1, the second press section P2 ... the final press section PF are arranged and partitioned for the sequential pressing of the concave groove, the convex shape, etc. finally formed on the separator Wsp. , The inspection section 100S is provided side by side in the final press section PF.

Each of the first to final press sections and the inspection section 100S has a lower die on the underbase bolster 102 and an upper die on the upper base ram 104, respectively. The lower die 110 and the upper die 111 of the first press section P1 are a pair of dies facing each other, and a part of the shape of the separator Wsp is formed on a titanium plate having a thickness of about 0.1 mm. The lower die 120 and the upper die 121 of the second press section P2 are a pair of dies facing each other, and the semi-finished separator Wsp formed in the first press section P1 has a portion different from that of the first press section P1. Perform the shaping of. The same applies to the press sections after the second press section P2. The lower die 140 and the upper die 141 of the final press section PF are a pair of dies facing each other, and the semi-finished separator Wsp formed in each of the previous press sections is die-cut into a rectangular shape. The inspection section 100S includes a pseudo lower die 150 and a pseudo upper die 151, and inspects the separator Wsp, which is a press-molded product obtained in the press section 100P. Further, since the inspection section 100S performs light irradiation and light reception thereof for inspection of the separator Wsp, unlike the press section, the pseudo upper mold 151 has a blackout screen 153. As will be described later, the blackout screen 153 surrounds the pseudo lower die 150 and shields the facing region between the pseudo lower die 150 and the pseudo upper die 151 from the outside when the pseudo upper die 151 descends. The relationship between the pseudo lower die 150 and the pseudo upper die 151 for inspecting and the die in the press section 100P will be described later.

The press forming line 100 lowers the ram 104 together with each of the above upper dies to perform press forming in each press section of the first press section P1 to the final press section PF and inspection of the press molded product in the inspection section 100S. And at the same time. Then, when the ram 104 is raised together with each of the above upper molds, the semi-finished product pressed in the first press section P1 is pressed in the second press section P2 and the second press section P2 in a transport device (not shown). Transport the semi-finished product to the press section downstream of it. Also from the final press section PF to the inspection section 100S, the separator Wsp, which is a finished press product whose outer shape has been removed, is conveyed by a transfer device (not shown). From the inspection section 100S, the separator Wsp inspected in the section is conveyed out of the line by a transfer device (not shown).

Next, the pseudo lower mold 150 and the pseudo upper mold 151 in the inspection section 100S will be described. FIG. 2 is an explanatory diagram showing a partially enlarged region A of the separator Wsp in FIG. 1 in a substantially enlarged manner. FIG. 3 is an explanatory view showing a cross-sectional view of the upper and lower dies and separator Wsp of the press section and the inspection section in the vertical plane along the 3-3 line in FIG.

As shown in FIG. 2, the separator Wsp includes a plurality of ridges Pk, and the ridges Pk are a pair of dies in the first press section P1 to the final press section PF shown in FIG. It is shaped by a mold, and it can be said that the shaped shape is defined by the lower mold surface 140s and the upper mold surface 141s of FIG. 3 in the final press section PF. That is, the ridge Pk is sequentially formed in each press section such as the first press section P1 before the final press section PF, but the lower die surface 140s and the upper die 141 of the lower die 140 of the final press section PF This is because the upper mold surface 141s is the same as the mold surface of the lower mold and the upper mold in each press section such as the first press section P1 before the final press section PF. Both the pseudo lower mold 150 and the pseudo upper mold 151 in the inspection section shown in FIG. 3 are plastic molded products, the pseudo lower mold 150 is provided with a light irradiation plate 160 on the lower mold surface 150s, and the pseudo upper mold 151 is a pseudo upper mold 151. A light receiving unit 170 is provided on the upper mold surface 151s.

The light irradiation plate 160 is an organic or inorganic EL sheet (EL: Electro-Luminescence). Then, in a state where the light irradiation plate 160 is closely attached to the lower die surface 150s of the pseudo lower die 150, the plate surface 160s is attached to the lower die 140 of the lower die 140 which is one of the dies in the final press section PF. A shape that follows the surface shape of the mold surface 140s, specifically the same shape as the mold surface shape, or a mold that is about 0.1 to 0.3 mm from the lower mold surface 140s of the lower mold 140, with dimensions reduced. The shape of the mold is formed, and light is radiated in a plane from each part of the plate surface 160s. As described above, since the plate surface 160s has a shape that imitates the lower mold surface 140s, the separator Wsp formed by the pair of opposite molds, the lower mold 140 and the upper mold 141, is in the inspection section. , In a state of being in close contact with the plate surface 160s of the light irradiation plate 160 in the pseudo lower mold 150, it is placed on the pseudo lower mold 150 and received. Then, the light irradiation plate 160 faces the entire shaping region of the separator Wsp including the convex Pk, and irradiates the separator Wsp with light. Therefore, this light irradiation plate 160, together with the pseudo lower mold 150, constructs the light irradiation unit in the present invention.

FIG. 4 is an explanatory diagram schematically showing the state of light irradiation from the light irradiation plate 160. In FIG. 4, for convenience of explanation, it is assumed that there is a uniform and minute gap (for example, the above-mentioned gap of 0.1 to 0.3 mm) between the plate surface 160s of the light irradiation plate 160 and the separator Wsp. , The state of light irradiation is shown. Since the corner portion of the ridge Pk receives the tensile force in the opposite direction as shown by the arrow in the figure during press molding by the lower mold and the upper mold, defects Wc such as cracks and pinholes are likely to occur, and the defect Wc. The generation angle of can be various angles as shown in the figure. However, since the light irradiation from the light irradiation plate 160 is irradiated in a planar manner as shown by the white arrow in FIG. 4, even if the defect Wc occurs at various angles, the defect Wc is directed toward the defect Wc. Light irradiation becomes possible.

The light receiving unit 170 is formed by arranging a minute light receiving element, for example, a CCD (Charge-Coupled Device) on the upper mold surface 151s of the pseudo upper mold 151, and is mounted in close contact with the upper mold surface 151s of the pseudo upper mold 151. In this state, the light receiving surface 171s has a shape that follows the surface shape of the upper mold surface 141s of the upper mold 141, which is the other mold, specifically, the same shape as the mold surface shape or 0.1 to 0. The mold surface shape is reduced by about 3 mm, and light is received at each part of the light receiving surface 171s. In this way, since the light receiving surface 171s has a shape that imitates the upper mold surface 141s, the light receiving portion 170 is in close contact with the plate surface 160s of the light irradiation plate 160 and is placed on the pseudo lower mold 150. The Wsp is faced over the entire shaping region of the separator Wsp containing the ridge Pk. Then, the light receiving unit 170 provided on the pseudo upper mold 151 faces the light irradiation plate 160 with the separator Wsp interposed therebetween, and receives the light irradiated by the light irradiation plate 160. The inspection section 100S including the light receiving portion 170 and the light irradiation plate 160 described above corresponds to the inspection device for the press-molded product in the present invention.

FIG. 5 is a process diagram showing an outline of a manufacturing process of the separator Wsp in the press forming line 100. FIG. 6 is a process diagram showing an outline of the procedure for the separator inspection. FIG. 7 is an explanatory diagram illustrating drive timings of various devices in association with the stroke of the ram 104 for driving the mold for separator inspection. FIG. 8 is an explanatory diagram showing the relationship between the mold and the separator Wsp in the separator inspection step and the state of inspection.

In the separator manufacturing process in the press forming line 100 of FIG. 1, the separator Wsp is sequentially conveyed in the press forming line 100 by a transfer device (not shown), and one drawing in the first press section P1 (procedure S100) is performed according to the procedure shown in FIG. ) Is performed, followed by two drawing in the second press section P2 (procedure S110), subsequent drawing in the press section, and external die cutting in the final press section PF (procedure S150). By this outer die cutting, a rectangular separator Wsp in which all the ridges Pk shown in FIG. 2 have been shaped is obtained, and this separator Wsp is placed on the pseudo lower die 150 of the inspection section 100S and the separator is inspected. (Procedure S200). If the inspection is passed in this procedure S200, the press forming line 100 continues the press forming of the separator Wsp without causing a line stop. On the other hand, if the inspection fails in the procedure S200, the press forming line 100 stops the press processing, that is, stops the device drive and ends the processing, and the worker recovers the failure, for example, the mold. Wait for face repair. After the failure recovery, the press molding of the separator Wsp is restarted from one drawing (procedure S100) in the first press section P1.

The separator inspection (procedure S200) in the separator manufacturing process of FIG. 5 is performed in the inspection section 100S including the pseudo lower mold 150 and the pseudo upper mold 151. In this separator inspection (procedure S200), first, the pseudo-upper mold 151 is lowered according to the procedure shown in FIG. 6 (procedure S210). The pseudo upper mold 151 starts descending from the top dead center at the time t1 of FIG. 7 with the descent of the ram 104 of FIG. 1, and the separator Wsp becomes the pseudo lower mold 150 at this time t1 as shown in FIG. Not installed. At time t2 in FIG. 7 where the descent of the pseudo upper mold 151 has progressed, the separator Wsp is conveyed to the inspection section 100S in FIG. 1 from the previous final press section PF by a transfer device (not shown), and the separator Wsp is transferred to the pseudo lower mold 150. More specifically, it is placed on a light irradiation plate 160 in close contact with the lower mold surface 150s, and as shown in FIG. 8, the lower surface of the separator of the separator Wsp overlaps with the plate surface 160s of the light irradiation plate 160. In each figure after the time t4 in FIG. 8, the notation of the plate surface 160s and the like is omitted.

At time t3 in FIG. 7, when the descent of the pseudo upper mold 151 is further advanced, the blackout screen 153 shown in FIG. 1 surrounds the pseudo lower mold 150 and shields the facing region between the pseudo lower mold 150 and the pseudo upper mold 151 from the outside. (Procedure S220). At time t4 in FIG. 7, where the descent of the pseudo upper mold 151 was further advanced, the downward convex portion of the pseudo upper mold 151 was located below the upward convex portion of the pseudo lower mold 150 as shown in FIG. 8, and at this time t4. The light receiving unit 170 in the pseudo upper mold 151 is turned on (procedure S230), and light can be received after time t4. Then, at time t5 in FIG. 7, where the pseudo-upper mold 151 has further descended, the pseudo-upper mold 151 has descended to just before the bottom dead center, and at this time t5, the light irradiation plate 160 in the pseudo-lower mold 150 has descended. It is turned on (procedure S240). As shown in FIG. 4, the light irradiation plate 160 turned on in this way irradiates light in a planar manner from the entire area of the plate surface 160s. Therefore, after time t5, the light is applied over the entire shaping region of the separator Wsp. Light is emitted from the irradiation plate 160. Therefore, after time 5, it is determined whether or not the light receiving unit 170 has detected light (procedure S250).

After the time t5, the pseudo upper mold 151 further descends separately from the light detection in the procedure S250, and at the time t6 of FIG. 7, temporarily stops at the bottom dead center and then starts to rise. The relationship between the pseudo lower mold 150 and the pseudo upper mold 151 at time t6 is shown in FIG. 8, and the bottom dead center of the pseudo upper mold 151 has been placed on the pseudo lower mold 150 via the light irradiation plate 160. The position is such that a gap of about 0.3 to 1.0 mm remains between the separator Wsp of No. 1 and the light receiving portion 170 of the pseudo upper mold 151. By doing so, the light receiving portion 170 already mounted on the pseudo upper mold 151 can be prevented from coming into contact with the separator Wsp, and damage to the light receiving portion 170 can be avoided.

The light detection determination in the procedure S250 shown in FIG. 6 is performed in parallel with the descent of the pseudo upper mold 151 described above, and when it is determined that the light detection is performed by the light receiving unit 170, the separator Wsp in the pseudo lower mold 150 of the inspection section 100S (Procedure S255). In the press forming line 100 shown in FIG. 1, since the separator Wsp is sequentially fed between each press section of the press section 100P and the inspection section 100S, the separator Wsp is placed on the inspection section 100S at the beginning of press working. There may be situations where it has not been done. In such a situation where the separator is not placed, it is said that the light receiving unit 170 detects light in the procedure S250, but this light detection is not based on the occurrence of the defect Wc as shown in FIG. 4 in the separator Wsp. .. On the other hand, if it is determined that the light receiving unit 170 detects light in the procedure S250 in the situation where the press working is advanced and the separator Wsp is placed in the inspection section 100S, this light detection is shown in FIG. 4 on the separator Wsp. It is based on the occurrence of the defect Wc as shown. The determination of the presence or absence of the separator in the procedure S255 is made to distinguish the above-mentioned situation. Then, if it is determined in the procedure S255 that there is no separator Wsp, the process proceeds to the procedure S260 described later. On the other hand, if it is determined in the procedure S255 that the separator Wsp is present, the photodetection in the previous procedure S250 is based on the defect Wc of the separator Wsp, so that the press machine of the press forming line 100 is stopped ( Procedure S257) Once the inspection is completed, the worker waits for the repair of the mold surface. In the determination of the presence / absence of the separator Wsp in the procedure S255, when the light receiving unit 170 receives light in the entire area, it can be determined that the separator Wsp is not placed in the inspection section 100S.

If it is determined in the procedure S250 that there is no light detection, the separator Wsp to be inspected in the inspection section 100S does not have the defect Wc. Therefore, when it is determined that there is no separator and that there is no separator in the procedure S255, the light irradiation plate 160 and the light receiving unit 170 are turned off at time t7 in FIG. 7 in preparation for the next inspection of the separator Wsp. (Procedure S260), the rise of the pseudo upper mold 151 is continued (Procedure S270), and the separator inspection is completed. In the inspection section 100S, the light shielding by the blackout screen 153 is released at the time t8 of the ascending process of the pseudo upper mold 151 after the time t7, and the inspected separator Wsp is out of the line from the inspection section 100S at the subsequent time t9. Will be transported to.

In the inspection section 100S as an inspection device for the press-molded product of the present embodiment described above, as shown in FIGS. 3 and 4, the light irradiation plate 160 mounted on the pseudo lower die 150 is finally pressed by the plate surface 160s. The shape follows the surface shape of the lower mold surface 140s of the lower mold 140 in the section PF, and covers the entire shaping region of the separator Wsp including the region where defective Wc such as cracks and pinholes may occur. Face each other. In addition to this, the inspection section 100S has a shape in which the light receiving portion 170 mounted on the pseudo upper die 151 has a light receiving surface 171s that follows the surface shape of the upper die surface 141s of the upper die 141 in the final press section PF. In this way, they face each other over the entire shaped region of the separator Wsp, including the region where defective Wc such as cracks and pinholes can occur. As a result, according to the inspection section 100S, even if the defect Wc such as a crack or a pinhole occurs in various shaping sites, the light irradiation from the light irradiation plate 160 toward the defect Wc and the defect Wc pass through. It is possible to receive the generated light by the light receiving unit 170, and it is possible to improve the detection accuracy of the defect Wc. Moreover, the equipment adjustment for light irradiation and the equipment adjustment for light reception are also simplified.

FIG. 9 is an explanatory diagram schematically showing the inspection section 100SA of the second embodiment. As shown in the figure, the inspection section 100SA of the second embodiment includes the same pseudo-lower mold 150 and the light irradiation plate 160 as the inspection section 100S of the first embodiment described above, and has a flat plate shape instead of the light receiving portion 170. It has a light receiving unit 170A. The light receiving portion 170A is formed by arranging the CCDs in a flat plate shape, is embedded in the inner ceiling wall and the inner side wall of the pseudo upper die 151A, and faces the light irradiation plate 160 of the pseudo lower die 150 with the separator Wsp interposed therebetween. Even in this pseudo upper mold 151A, it is attached to the ram 104 shown in FIG. 1 and moves up and down. In order to suppress the influence of vibration from the press section 100P, the light receiving portion 170A is embedded and mounted in the pseudo upper mold 151A via the vibration-proof rubber 155, respectively. Even in the inspection section 100SA of the second embodiment, the light irradiation plate 160 to be mounted on the pseudo lower mold 150 has a surface shape of the lower mold surface 140s of the lower mold 140 in the final press section PF. The separator Wsp is faced over the entire shape region including the region where defects Wc such as cracks and pinholes may occur. Therefore, the inspection section 100SA of the second embodiment can also improve the detection accuracy of the defect Wc and simplify the equipment adjustment. Further, since the light receiving unit 170A can be used as an existing flat plate-shaped light receiving unit, the cost can be reduced.

FIG. 10 is an explanatory diagram schematically showing the inspection section 100SB of the third embodiment. As shown in the figure, the inspection section 100SB of the third embodiment includes the same pseudo upper mold 151 and the light receiving portion 170 as the inspection section 100S of the first embodiment described above, and the pseudo lower mold 150 is light-transmitting. It is composed of prisms, and the lower die surface 150s has a shape that follows the surface shape of the lower die surface 140s of the lower die 140 in the final press section PF. In addition, the inspection section 100SB incorporates a flat plate-shaped light source 159 into the base 158 of the pseudo-lower mold 150, and guides the light emitted by the light source 159 to the entire area of the shape-forming region of the separator Wsp by the pseudo-lower mold 150. .. Therefore, even with the inspection section 100SA of the third embodiment, the detection accuracy of the defect Wc can be improved and the equipment adjustment becomes simple as in the first embodiment.

FIG. 11 is an explanatory diagram schematically showing the inspection section 100SC of the fourth embodiment. As shown in the figure, the inspection section 100SC of the fourth embodiment includes the same pseudo-lower mold 150 and the light irradiation plate 160 as the inspection section 100S of the first embodiment described above, and has a flat plate shape instead of the light receiving portion 170. It has a light receiving unit 170A and a light collecting unit 152 composed of a light transmitting prism that exerts a light collecting function on the light receiving unit 170A. The light receiving unit 170A is formed by arranging the CCDs in a flat plate shape, is embedded in the ceiling wall of the pseudo upper mold 151A, and faces the light irradiation plate 160 of the pseudo lower mold 150 with the separator Wsp interposed therebetween. The light collecting unit 152 is held by a holding shaft (not shown) so as to face the light receiving unit 170A. Even in this pseudo upper mold 151A, it is attached to the ram 104 shown in FIG. 1 and moves up and down. In order to suppress the influence of vibration from the press section 100P, the light receiving portion 170A is embedded and mounted in the pseudo upper mold 151A via the vibration-proof rubber 155, respectively. Even in the inspection section 100SC of the fourth embodiment, the light irradiation plate 160 to be mounted on the pseudo lower mold 150 has a surface shape of the lower mold surface 140s of the lower mold 140 in the final press section PF. The separator Wsp is faced over the entire shape region including the region where defects Wc such as cracks and pinholes may occur. Therefore, the inspection section 100SC of the fourth embodiment can also improve the detection accuracy of the defect Wc and simplify the equipment adjustment. Further, since the light receiving portion 170A may be an existing flat plate-shaped light receiving portion and then embedded in the inner ceiling wall of the pseudo upper die 151A, the cost can be reduced.

The present invention is not limited to the above-described embodiments, examples, and modifications, and can be realized with various configurations within a range not deviating from the gist thereof. For example, the technical features in the embodiments, examples, and modifications corresponding to the technical features in each of the embodiments described in the column of the outline of the invention may be used to solve some or all of the above-mentioned problems. , Can be replaced or combined as appropriate to achieve some or all of the above effects. Further, if the technical feature is not described as essential in the present specification, it can be appropriately deleted.

In the above-described embodiment, the inspection section 100S is continuously provided in the press section 100P, but the inspection section 100S may be provided independently of the press section 100P. Further, the press section 100P may be used as one press section.

In the above-described embodiment, the light irradiation plate 160 is formed from an EL sheet, but the present invention is not limited to this. For example, a light-transmitting transparent resin plate such as acrylic may be formed in the same shape as the light irradiation plate 160 made of an EL sheet, and the resin plate may be irradiated with light from the end face of the resin plate. In this case, since the transparent resin plate functions as a light guide path, the separator Wsp can be irradiated with light in the same manner as the light irradiation plate 160 made of an EL sheet.

In the above-described embodiment, the blackout screen 153 is provided on the pseudo upper mold 151, but the blackout screen 153 may be omitted by disposing the inspection section 100S in the dark room.

100 ... Press molding line 100P ... Press section 100S, 100SA-100SC ... Inspection section 102 ... Bolster 104 ... Ram 110 ... Lower mold 111 ... Upper mold 120 ... Lower mold 121 ... Upper mold 140 ... Lower mold 140s ... Lower mold surface 141 ... Upper mold 141s ... Upper mold surface 150 ... Pseudo lower mold 150s ... Lower mold surface 151 ... Pseudo upper mold 151A ... Pseudo upper mold 151s ... Upper mold surface 152 ... Condensing part 153 ... Blackout screen 155 ... Anti-vibration rubber 158 ... Base 159 ... Light source 160 ... Light irradiation plate 160s ... Plate surface 170 ... Light receiving part 170A ... Light receiving part 171s ... Light receiving surface P1 ... First press section P2 ... Second press section PF ... Final press section Pk ... Convex Wc ... Defect Wsp ... Separator

Claims (2)

An inspection device for press-molded products shaped by a pair of facing dies.
A light irradiation unit that irradiates light toward the press-molded product,
It is provided with a light receiving unit that faces the light irradiation unit with the press-molded product interposed therebetween and receives the light irradiated by the light irradiation unit.
The light irradiation portion has a shape that follows the surface shape of the mold surface of one of the pair of molds, and the light receiving portion has a shape of the mold surface of the other mold of the pair of molds. It is said to have a shape that follows the surface shape.
Inspection equipment for press-molded products. An inspection device for press-molded products shaped by a pair of facing dies.
A light irradiation unit that irradiates light toward the press-molded product,
A light receiving unit that faces the light irradiation unit with the press-molded product interposed therebetween and receives the light irradiated by the light irradiation unit.
It is composed of a transmissive prism arranged between the press-molded product and the light-receiving portion, and includes a light-collecting portion that collects light incident from the press-molded product side on the light-receiving portion .
The light irradiation unit has a shape that follows the surface shape of the mold surface of one of the pair of molds .
The side of the press-molded product of the prism has a shape that follows the surface shape of the mold surface of the other mold of the pair of dies .
Inspection equipment for press-molded products.

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