JP6828255B2 - Foreign matter detection method, foreign matter detection device, elastomer molded product manufacturing method and elastomer molded product manufacturing device - Google Patents

Description

The present invention relates to a method for detecting a foreign substance, a device for detecting a foreign substance, a method for producing an elastomer molded product, and an apparatus for producing an elastomer molded product.

In the process of manufacturing an elastomer molded product such as rubber, foreign matter is detected, but the foreign matter is often detected after molding into a block or a sheet. For example, in Patent Document 1, foreign matter is detected after the rubber is molded into a sheet shape.

Japanese Unexamined Patent Publication No. 09-174654

The present invention has been made in view of such an actual situation, and an object of the present invention is a method for detecting a foreign substance and a method for detecting a foreign substance, which can detect a foreign substance before molding the elastomer molded body into a molded body such as a block or a sheet. To provide an apparatus, and to provide a method and an apparatus for producing an elastomer molded product from which a foreign substance is removed by using such a detection method or an apparatus.

The method for detecting a foreign substance according to the present invention is
A method for detecting foreign substances contained in crumbs generated in the process of manufacturing an elastomer molded product.
A step of transporting the crumb in the transport direction by using a vibrating conveyor having a transport surface that vibrates including a displacement component in the transport direction and the opposite direction.
A step of continuously capturing an image of the crumb transported on the transport surface during a predetermined transport section to acquire an image.
It includes a step of detecting the foreign matter contained in the crumb from the image taken.

In the method for detecting a foreign substance according to the present invention, by transporting the crumbs using a vibrating conveyor, small pieces constituting the crumbs are conveyed while rotating on the transport surface. Therefore, by continuously imaging such a crumb during a predetermined transport section, it is possible to image not only one surface of the small pieces constituting the crumb but also the back surface of the small piece, and foreign matter contained in the crumb. Can be detected accurately. Further, since the small pieces constituting the crumb rotate during transportation, the detection of foreign matter can be performed by an easy method of imaging the crumb on the transport surface from above.

Further, for example, the transport surface of the vibrating conveyor may have undulations or irregularities.

By forming undulations or irregularities on the transport surface of the vibrating conveyor, the small pieces constituting the crumb can easily rotate during transport, so that foreign matter can be detected quickly.

Further, for example, the transport surface of the vibrating conveyor may have an inclination that becomes higher or lower along the transfer direction.

By making the transport surface higher or lower along the transport direction, the small pieces constituting the crumb can easily rotate during transport, so that foreign matter can be detected quickly.

In addition, the method for producing an elastomer molded product according to the present invention includes a step of removing the foreign matter detected by the above-mentioned foreign matter detecting method.

In such a method for producing an elastomer molded product, a high-quality elastomer molded product with less foreign matter can be obtained by removing the foreign matter detected in the crumb state.

Further, for example, in the step of removing the foreign matter in the method for manufacturing an elastomer molded product, even if the crumb carried by the vibrating conveyor is dropped and the detected foreign matter is removed from the crumb in the middle of falling. Good.

The method for removing the foreign matter from the crumb is not particularly limited, but it is possible to quickly remove the foreign matter by removing the foreign matter from the crumb in the middle of falling. For example, air pressure can be applied to a crumb in the middle of falling to change the fall trajectory of small pieces containing foreign matter, and foreign matter can be removed from the crumb. Alternatively, the clam in the middle of falling can be removed together with the foreign matter by applying an exclusion plate or the like to a small piece in the middle of falling containing foreign matter. Alternatively, the foreign matter can be removed by switching the regular accommodating means for accommodating the crumb to the exclusion accommodating means at the timing when the crumb containing the foreign matter falls.

Further, the foreign matter detection device according to the present invention is
A detection device that detects foreign substances contained in crumbs generated in the process of manufacturing an elastomer molded product.
A transport means for transporting the crumb in the transport direction by causing vibration including a displacement component in the transport direction and the opposite direction on the transport surface on which the crumb is placed.
An image acquisition means for continuously imaging and acquiring an image of the crumb transported on the transport surface during a predetermined transport section.
A foreign matter detecting device having a calculation means for analyzing the acquired image and detecting the foreign matter contained in the crumb.

In the foreign matter detecting device according to the present invention, by vibrating the transport surface to transport the crumb, small pieces constituting the crumb are transported while rotating on the transport surface. Therefore, by continuously imaging such a crumb during a predetermined transport section, the small pieces constituting the crumb can be viewed at various angles even if a large number of image acquisition means are not provided or the image acquisition means are not moved. It is possible to take an image from the image, and it is possible to accurately detect foreign matter contained in the crumb.

In addition, the apparatus for producing an elastomer molded product according to the present invention has a removing means for removing the foreign matter detected by the detection device.

Such an elastomer molded product manufacturing apparatus can obtain a high-quality elastomer molded product with less foreign matter by removing the foreign matter detected in the crumb state. In addition, since it is not necessary to remove foreign matter from the sheet or block-shaped elastomer molded product, the productivity is also good.

FIG. 1 is a schematic view showing a part of an apparatus for producing an elastomer molded product according to an embodiment of the present invention. FIG. 2 is a schematic view of a vibrating conveyor included in the detection device incorporated in the device for manufacturing the elastomer molded product shown in FIG. FIG. 3 is a partial cross-sectional view showing a transport surface of the vibrating device shown in FIG. 2 and an enlarged schematic view of the transport surface. FIG. 4 is a schematic view of the vibrating conveyor according to the first modification. FIG. 5 is a partial cross-sectional view showing a transport surface of the vibrating conveyor according to the second modification and an enlarged schematic view of the transport surface. FIG. 6 is a partial cross-sectional view showing a transport surface of the vibrating conveyor according to the third modification.

Hereinafter, the present invention will be described based on the embodiments shown in the drawings.

FIG. 1 is a schematic view showing a part of an elastomer molded product manufacturing apparatus 2 according to an embodiment of the present invention. The elastomer molded product manufacturing apparatus 2 includes a drying chamber 20, a detecting apparatus 30, a gas blowing nozzle 70 as a removing means, a molding apparatus 86, and the like. As shown in FIG. 1, in the drying chamber 20, the crumb 10 is dried while being conveyed in a predetermined direction by a belt conveyor 22 having a perforated belt 24. In the pre-process of the drying chamber 20, the crumb 10 made of an elastomer such as rubber and containing water is discharged from an extruder or the like (not shown), but in FIG. 1, the processes before the drying chamber 20 are shown. Absent.

The crumb 10 is produced in the process of producing an elastomer molded product. In the process of producing an elastomer molded product (not shown) performed before the drying chamber 20, for example, an elastomer containing water is obtained through other steps such as polymerization reaction and cross-linking reaction of raw materials. The water-containing elastomer is compressed above the water vapor pressure inside the extruder. Therefore, when the water-containing elastomer is released into the atmosphere from a die (not shown), it expands and bursts, the water becomes steam, and the elastomer becomes a crumb 10 composed of porous small pieces 10a. ..

In the specification, when simply referring to crumb 10, it means an intermediate product (collection of small pieces 10a) containing an arbitrary amount of small pieces 10a, and when referring to one crumb, it is distinguished from this small piece. It is called 10a.

The crumb 10 discharged from the die of the extruder collides with the peripheral surface of the cap member (not shown) and falls onto the perforated belt 24 of the belt conveyor 22 arranged in the drying chamber 20. Further, the crumb 10 is conveyed inside the drying chamber 20 in a state of being dispersed on the perforated belt 24.

The belt conveyor 22 in the drying chamber 20 moves the perforated belt 24 on which the crumb 10 is placed in a predetermined direction by a rotating roller or the like. The perforated belt 24 is made of, for example, a stainless steel plate having holes formed at an aperture ratio of about 30 to 40%. The size of the holes is such that the crumb 10 deposited on the perforated belt 24 does not fall. A nozzle (not shown) is arranged below the perforated belt 24, and drying air is blown from the nozzle from the back surface of the perforated belt 24 on which the crumb 10 is deposited. The temperature of the drying air is, for example, about 50 to 95 ° C.

The crumb 10 dried in the drying chamber 20 moves to the detection device 30 for detecting foreign matter contained in the crumb 10. The detection device 30 includes a vibration conveyor 40 as a transport means, an image pickup device 54 as an image acquisition means, and a control unit 56 including a calculation means.

As shown in FIG. 1, the crumb 10 exiting the outlet of the drying chamber 20 is dropped onto the transport surface 42 of the vibrating conveyor 40 and transported in the transport direction (X-axis direction). FIG. 2 is a schematic view of the vibration conveyor 40 included in the detection device 30.

The vibrating conveyor 40 includes a transport trough 41 having a transport surface 42 on which the crumb 10 is placed, leaf springs 47 and 48 elastically supporting the transport trough 41, and a vibrator 46 for vibrating the transport trough 41 including the transport surface 42. And have. The leaf springs 47 and 48 are made of an elastic material such as metal, the upper end thereof is fixed to the bottom surface of the transport trough 41, and the lower end face is fixed to the pedestal 49.

The vibrator 46 has a coil 44 fixed to the pedestal 49 and a core 45 arranged so as to face the coil 44 and having an end fixed to the leaf spring 47. The control unit 56 shown in FIG. 1 controls the vibration of the transport surface 42 by controlling the current flowing through the coil 44 of the vibrator 46 shown in FIG. That is, when a current is passed through the coil 44, a magnetic field is formed around the coil 44 in which the core 45 is arranged. Therefore, the magnetic field causes the core 45 to be attracted and separated from the coil 44. The control unit 56 deforms the leaf spring 47 to which the core 45 is fixed by controlling the force acting on the core 45, and the transfer trough 41 and the transfer surface 42 are vibrated by the deformation of the leaf spring 47. In this way, the transport trough 41 and the transport surface 42 generate vibrations including displacement components in the transport direction and vice versa.
As a method of generating vibration including a displacement component in the transport direction and the opposite direction on the transport trough 41 and the transport surface 42, in addition to the method of combining the coil and the core, a vibration motor equipped with an eccentric weight is attached. A method of vibrating the transport trough can also be used. In the case of the method using the vibration motor, for example, by combining two vibration motors, the vibration direction of the transport trough can be controlled to the vibration including the displacement component in the transport direction and the opposite direction.

FIG. 3 is a partial cross-sectional view of the transport trough 41 shown in FIG. As shown in FIG. 3, the transport surface 42 is formed with wavy undulations in which the top and bottom are repeated along the transport direction. Here, inferring from the knowledge obtained from the examples described later, when the transport surface 42 is flat, the crumb 10 tends to move on the transport surface 42 without rotating, and the transport surface 42 has undulations and irregularities. When formed, it is considered that the crumb 10 tends to move while rotating on the transport surface 42.

Therefore, due to the wavy undulations formed on the transport surface 42, the transport distance required for the crumb 10 to rotate once on the transport surface 42 is shorter than when the transport surface 42 is flat, and the crumb 10 is transported while rotating frequently. The specific shape of the undulations formed on the transport surface 42 is not particularly limited, but for example, the distance L1 from the adjacent top to the top may be 10 to 50 mm, and the height L2 from the bottom of the top may be 5 to 25 mm. it can. Further, the undulations formed on the transport surface 42 may be smooth wavy as shown in FIG. 3, or may be undulations with edges such as a triangular wave.

As shown in FIG. 1, the detection device 30 has an image pickup device 54 as an image acquisition means for capturing an image of the crumb 10 conveyed on the transport surface 42 and acquiring an image. The image pickup apparatus 54 includes a photoelectric conversion element such as a CCD, a lens that guides light to the photoelectric conversion element, and the like, and images a crumb 10 moving on the transport surface 42 to generate an image. The image acquired by the image pickup apparatus 54 is sent to the control unit 56. The image acquired by the image pickup apparatus 54 may be a moving image or a still image captured at a predetermined cycle.

The imaging device 54 preferably has an imaging field of view that covers at least the predetermined transport section W1 so that the small piece 10a can be continuously imaged while the arbitrary small piece 10a passes through the predetermined transport section W1. The imaging field of view of the predetermined transport section W1 and the imaging device 54 corresponding thereto is determined in consideration of, for example, the average value of the transport distances required for the crumb 10 to rotate once on the transport surface 42 and its variation. It can be done, but it is not particularly limited. The number of image pickup devices 54 is not limited to one, and a plurality of image pickup devices 54 may be used to image the crumb 10 in the transport section W1.

The control unit 56 functions as a calculation means for analyzing the image acquired by the image pickup device 54 and detecting the foreign matter contained in the crumb 10. The method of analyzing the image by the control unit 56 is not particularly limited, and foreign matter can be detected based on the brightness (brightness, brightness) of the image, hue, saturation, RGB output value, and the like. For example, when the image of the small piece 10a included in the acquired image is darker than a predetermined brightness, the control unit 56 determines that the small piece 10a contains a foreign substance. Further, for example, the control unit 56 can detect the foreign matter by comparing (matching) the RGB output value of the acquired image data with the RGB output value of the foreign matter registered in advance.

Further, for example, the control unit 56 has a plurality of frames or still images acquired while the specific small piece 10a moves in the predetermined transport section W1, and in any of the frames or still images, foreign matter is contained in the small piece 10a. When it is determined that it is contained, it can be determined that the small piece 10a contains a foreign substance even if it is not determined so in another frame or still image. This is because the foreign matter contained in the small piece 10a may appear only on a specific surface of the small piece 10a.

As shown in FIG. 1, the crumb 10 transported on the transport surface 42 by the vibrating conveyor 40 is dropped from above the transport surface 42 toward the hopper 84 at the outlet of the transport trough 41 in the vibrating conveyor 40. The crumb 10 that has fallen onto the hopper 84 enters the molding apparatus 86 connected to the lower portion of the hopper 84.

The molding apparatus 86 molds the elastomer molded product 100 using the crumb 10 charged in the hopper 84 as a raw material. The elastomer molded product 100 obtained by the molding apparatus 86 is not particularly limited, and examples thereof include a rubber bale and a rubber sheet.

In the manufacturing apparatus 2 according to the present embodiment, the gas blowing nozzle 70 as a removing means is arranged adjacent to the falling path where the crumb 10 falls from the transport surface 42 to the hopper 84. The gas blowing nozzle 70 can blow gas such as air to the crumb at a position on the way from the transport surface 42 to the hopper 84.

That is, the gas blowing nozzle 70 is controlled by the control unit 56, and when the small piece 12a determined by the detection device 30 to contain a foreign substance falls, the gas is blown to the small piece 12a or the crumb 10 including the small piece 12a. As a result, the falling direction of the small piece 12a containing the foreign matter is changed, and the small piece 12a containing the foreign matter is housed inside the foreign matter storage box 80 instead of the hopper 84.

The removing means for removing foreign matter from the crumb 10 is not limited to the gas blowing nozzle 70 shown in FIG. For example, according to the control signal of the control unit 56, the exclusion plate is inserted into the drop path of the crumb 10 at the timing when the small piece 12a in which the foreign matter is detected falls, and the small piece 12a containing the foreign matter is applied to the exclusion plate in the falling direction. The removal means may be configured by an exclusion plate drive mechanism that changes the number of parts. Further, for example, according to the control signal of the control unit 56, the regular accommodating unit (for example, the hopper 84) accommodating the fallen crumb is switched to the exclusion accommodating unit at the timing when the small piece 12a in which the foreign matter is detected falls. The removal means may be configured by means. Further, for example, the removing means may be configured by a suction nozzle that sucks and removes the small piece 12a in which the foreign matter is detected according to the control signal of the control unit 56. In this case, the suction nozzle may be arranged at the drop position of the crumb 10 or may be arranged on the downstream side of the transport section W1 so as to face the transport surface 42.

According to the detection method by the detection device 30 as described above, by transporting the crumb 10 using the vibrating conveyor 40, the small pieces 10a constituting the crumb 10 are conveyed while rotating on the transport surface 42. Therefore, by continuously imaging such a crumb 10 during a predetermined transport section W1, it is possible to rotate and image the surface of the small piece 10a facing the transport surface 42 side. Therefore, according to such a detection method, it is possible to accurately detect the foreign matter contained in the crumb 10, and the foreign matter is removed by removing the detected foreign matter with the removing means gas blowing nozzle 70 or the like. It is possible to obtain a small amount of high-quality elastomer molded product.

Further, the above-mentioned detection method simply replaces the device for transporting and dropping the crumb 10 before, during, or after drying in the conventional manufacturing process of the elastomer molded product with the detection device 30 as shown in FIG. It is possible to carry out, and it is possible to detect and remove foreign substances without increasing the number of steps.

Although the present invention has been described based on the embodiments shown in FIGS. 1 to 3, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications are included. For example, the elastomer molded product 100 in the present embodiment is not particularly limited as long as it is a polymer having rubber elasticity, and examples thereof include so-called synthetic rubber and thermoplastic elastomer molded products. It can be widely applied to these elastomer molded products. Specifically, synthetic rubbers such as styrene-butadiene rubber (SBR), nitrile-butadiene rubber (NBR), butadiene rubber (BR), isoprene rubber (IR), acrylic rubber, polyether rubber, and hydrin rubber; styrene- Thermoplastic elastomers such as isoprene-styrene block polymer (SIS), styrene-butadiene-styrene block polymer (SBS), and their hydride block polymers; of common synthetic rubber and thermoplastic elastomer moldings such as Widely applicable to manufacturing.

FIG. 4 is a schematic view showing a vibrating conveyor 140, which is a modification of the vibrating conveyor 40 shown in FIG. The vibrating conveyor 140 differs from the vibrating conveyor 40 in that the length of one leaf spring 148 supporting the transport trough 141 is longer than that of the other leaf spring 47, and the transport trough 141 and the transport surface 142 are not horizontal. However, since the other points of the vibrating conveyor 140 are the same as those of the vibrating conveyor 40, the description of the same parts will be omitted.
As a method of providing an inclination that rises along the transport direction on the transport surface of the vibrating conveyor, in addition to the method of different lengths of the leaf springs, for example, the vibrating conveyor itself shown in FIG. May be a method of tilting using a pedestal or the like.

The transport surface 142 of the vibrating conveyor 140 has an inclination that increases along the transport direction. According to the vibrating conveyor 140 having such an inclined transport surface 142, the crumb 10 moves the transport surface 142 while rotating more frequently than the vibrating device in which the transport surface 142 is horizontal. The rising angle θ of the transport surface 142 is not particularly limited, but is preferably 1 to 15 degrees, more preferably 5 to 10 degrees, for example.

It is preferable that the transport surface 142 is formed with undulations or irregularities as in the transport surface 42 of the vibrating conveyor 40 according to the first embodiment. A detection device having such a vibrating conveyor 140 and a detection method using the same have the same effects as the detection device 30 shown in FIG. 1 and the detection method using the same. In addition, a modification of the present invention also includes a detection method using a vibrating conveyor having an inclination in which the transport surface is lowered along the transport direction.

FIG. 5 is a partial cross-sectional view showing the transport trough 241 and the transport surface 242, which are modified examples of the transport trough 41 and the transport surface 42 shown in FIG. The transport surface 242 included in the transport trough 241 differs from the transport surface 42 shown in FIG. 3 in that a large number of convex protrusions 243 are formed on the transport surface 242 instead of wavy undulations (see FIG. 3). , The rest is the same.

Since the protrusion 243 is formed on the transport surface 142, the crumb 10 can be transported while rotating more frequently than when the transport surface is flat. The specific shape of the protrusion 243 formed on the transport surface 242 is not particularly limited, but for example, the height L3 from the bottom of the protrusion 243 can be 5 to 25 mm, and the formation density of the protrusion 243 is per 1 m ^2. It can be 200 to 2000 pieces. Even if a vibrating conveyor having such a transport surface 142 is used, the same effect as the detection method according to the embodiment can be obtained. It should be noted that the transport surface may be formed with a concave recess instead of the protrusion, or the protrusion and the recess may be formed so as to be adjacent to each other.

FIG. 6 is a partial cross-sectional view showing the transport trough 341 and the transport surface 342, which are modified examples of the transport trough 41 and the transport surface 42 shown in FIG. The transport surface 342 included in the transport trough 341 is flat without wavy undulations (see FIG. 3) or unevenness (see FIG. 4), and the transport surfaces 42 and 142 shown in FIGS. 3 and 4 are flat. The same is true for the rest.

A vibrating conveyor having a flat transport surface 342 as shown in FIG. 6 can also rotate the crumb 10 on the transport surface 342 during transport. However, the flat transport surface 342 tends to rotate less frequently than the crumb 10 when the transport surface has undulations or irregularities. Therefore, when a flat transport surface 342 is adopted, it is preferable to incline the transport surface 342 so as to be higher along the transport direction, similarly to the vibrating conveyor 140 shown in FIG.

The vibrating conveyor may have undulations or protrusions formed on the entire transfer surface, but may have undulations or protrusions formed on a part of the transfer surface. For example, in the transport surface 42 shown in FIG. 1, undulations or irregularities are formed on the transport surface 42 of a predetermined transport section W1 for which an image is acquired by the imaging device 54, and after passing the transport section W1 to the outlet of the transport trough 41. The transport surface 42 may be a flat transport surface as shown in FIG. As a result, it is possible to suppress the problem that the drop timing and drop position of the small piece 12a containing the foreign matter deviates from the timing and position expected from the image acquired by the image pickup apparatus 54.

Hereinafter, a more specific example will be described in detail, but the present invention is not limited to these examples.

In the examples, the following No. 1 to No. Three transport means of No. 3 were prepared, and for each transport means, it was verified whether or not the crumb 10 transporting the transport surface rotates once or more within a predetermined time (4 seconds).

(Transportation means)
No. The transporting means according to No. 1 is a vibrating conveyor that is horizontal as shown in FIG. 2 and has a flat transport surface as shown in FIG. No. The transporting means according to No. 2 is a vibrating conveyor having a transporting surface that is horizontal as shown in FIG. 2 and has wavy undulations as shown in FIG. No. As shown in FIG. 3, the transport means according to No. 3 has an inclination (inclination angle of 5 degrees) that increases in the transport direction, and No. Similar to No. 2, it is a vibrating conveyor having a transport surface having wavy undulations as shown in FIG.

(Transport conditions)
After placing a crumb containing several small pieces colored so that the rotation can be recognized on the transport surface, the crumb is transported at a speed of 10 m / min by vibrating the transport surface, and the crumb on the transport surface is captured by a digital imaging device. The image was taken. The transport conditions are that the density of crumbs on the transport surface is "sparse" (to the extent that moving crumbs do not contact each other on the transport surface), "dense" (to the extent that the crumbs cover the transport surface with 1.5 layers), and " It was carried out under three conditions of "very dense" (the crumb covers the transport surface with four layers). The crumbs used were those collected from the production line of the factory.

(Rotation detection)
The captured image was analyzed, and it was counted as successful if all of the colored pieces rotated at least once within 4 seconds from the start of transportation, and failed if there was even one piece that could not rotate even once within 4 seconds. .. For each transport condition of each transport device, transport and detection were performed three times. The results are shown in Table 1.

As shown in Table 1, under the condition that the density of crumb 10 is "sparse", No. 1-No. All three transport means were successful in all three trials. However, under the condition that the density of crumb 10 is "dense", No. 2 and No. 3 transport means were successful in all 3 trials. Furthermore, at a level where the density of crumb 10 is "very dense", No. Only 3 transport means were successful in all 3 trials.

From this result, it was possible to verify that the crumb can be conveyed while rotating by the vibrating conveyor. Further, in order to rotate the crumb quickly, it can be verified that it is effective to form undulations on the transport surface, and it is further effective to form undulations on the transport surface and incline the transport surface. It was.

2 ... Elastomer molded product manufacturing equipment 10 ... Clam 10a ... Small pieces 20 ... Drying chamber 22 ... Belt conveyor 24 ... Perforated belt 30 ... Detection device 40, 140 ... Vibration conveyor 41, 141, 241, 341 ... Conveyor troughs 42, 142, 242, 342 ... Conveyor surface 243 ... Projection 44 ... Coil 45 ... Core 46 ... Vibrator 47, 48, 148 ... Leaf spring 49 ... Pedestal 54 ... Imaging device 56 ... Control unit 70 ... Gas outlet nozzle 80 ... Box 84 ... Hopper 86 ... Molding device 100 ... Elastomer molded product

Claims (7)

A method for detecting foreign substances contained in crumbs generated in the process of manufacturing an elastomer molded product.
A step of transporting the crumb in the transport direction by using a vibrating conveyor having a transport surface that vibrates including a displacement component in the transport direction and the opposite direction.
A step of continuously capturing an image of the crumb transported on the transport surface during a predetermined transport section to acquire an image.
From the captured image; have a, a step of detecting the foreign substance contained in the crumb,
In the step of transporting the crumb, the small pieces constituting the crumb are rotated on the transport surface due to the formation of undulations or irregularities on the transport surface or the inclination of the transport surface. Transport while letting
In the step of acquiring the image, a method for detecting a foreign substance that images the front surface and the back surface of one of the rotating small pieces . Wherein the conveying surface is, the detection method of the foreign matter according to claim 1, characterized in that it is caused prone form of wave-shaped top and bottom are repeated along the conveying direction. The conveying surface is method for detecting foreign matter according to claim 1 or 2, characterized in that it has the inclination which rises along the conveying direction. A method for producing an elastomer molded product, which comprises a step of removing the foreign matter detected by the foreign matter detecting method according to any one of claims 1 to 3. The elastomer molded product according to claim 4, wherein in the step of removing the foreign matter, the crumb carried by the vibrating conveyor is dropped and the detected foreign matter is removed from the crumb during the dropping. Manufacturing method. A detection device that detects foreign substances contained in crumbs generated in the process of manufacturing an elastomer molded product.
A transport means for transporting the crumb in the transport direction by causing vibration including a displacement component in the transport direction and the opposite direction on the transport surface on which the crumb is placed.
An image acquisition means for continuously imaging and acquiring an image of the crumb transported on the transport surface during a predetermined transport section.
Analyzes the acquired image, have a, a calculating means for detecting the foreign matter contained in the crumb,
The transport surface is undulating or uneven, or has an inclination, and the transport means transports the small pieces constituting the crumb while rotating on the transport surface.
The image acquisition means is a foreign matter detecting device that images the front surface and the back surface of one of the rotated small pieces . The foreign matter detection device according to claim 6 and
An apparatus for producing an elastomer molded product, comprising a removing means for removing the foreign matter detected by the detecting apparatus.

Images