JP2001050901A - Foreign-body inspection apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a foreign-body inspection apparatus which prevents a previously measured pellet from being left, prevents a pellet from being scattered while a foreign body is being measured and by which a foreign body on the pellet as a sample can be inspected with good accuracy. SOLUTION: This foreign-body inspection apparatus is constituted, in such a way that a pellet is supplied onto a turntable 31 through an ion air flow and a static eliminator 25, that the pellet which is conveyed by the turntable 31 so as to pass a prescribed position read out by a CCD camera 41, that the pellet which reaches a prescribed position on the downstream side of the CCD camera 41 is sucked by a suction pipe 51 after a prescribed time interval from the collection time of a foreign body, that the pellet is removed from the turntable 31 and that the pellet is sucked by a suction pipe 61 in a prescribed position on the downstream side of a removal position to be collected from the turntable. In addition, a supply means is provided with a vibrating sieve by which a pellet in a prescribed length or higher is removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foreign matter inspection apparatus for inspecting foreign matter in a pellet, and more particularly, to a method of removing static electricity from a pellet before inspecting foreign matter to prevent a previously measured pellet from remaining due to static electricity and to perform measurement. The present invention relates to a foreign substance inspection device that has improved inspection accuracy by preventing pellets from scattering inside.

[0002]

2. Description of the Related Art Japanese Patent No. 2547304 discloses that a powdery or granular material sampled by a sampling mechanism is supplied in parallel to a foreign matter inspection mechanism and a color tone inspection mechanism so that the foreign matter inspection and the color tone inspection are simultaneously performed. A system is disclosed. The foreign matter inspection mechanism of the publication discloses a method in which a particulate material sampled by a sampling mechanism is constantly stored in a supply hopper by a predetermined amount, cut out little by little from the supply hopper, and continuously supplied so as to be lined up on a rotary table. This is a mechanism for detecting foreign matter by photographing it at a predetermined position, removing the detected foreign matter from the rotary table, and storing non-defective products in the weighing hopper from the rotary table.

[0003]

Problems to be Solved by the Invention Patent No. 2547304
The system disclosed in Japanese Patent Application Laid-Open Publication No. H10-15064 samples a part of the granular material flowing in an online pipe, guides it to a cyclone through a sample transport pipe, and in the cyclone, air (= air for transporting the granular material in the sample transport pipe). (Estimated) and is stored in a supply hopper, and supplied from the supply hopper to the rotary table and the color tone inspection mechanism. That is,
There is no special mechanism for separating powder and granules.

For this reason, there is a problem in that the equipment stops due to line clogging due to the inclusion of long pellets, erroneous determination due to the last product or remaining foreign matter, and that the lower illumination is hindered due to scattering of the sample, so that optimum brightness cannot be obtained. It is considered that a defect also occurs.

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned disadvantages and to accurately perform a foreign substance inspection of a pellet sample without stopping a trouble.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a foreign matter inspection apparatus for inspecting foreign matter in a pellet, comprising: supply means for supplying a pellet onto a turntable through an ion air flow and a static eliminator; Foreign matter detecting means for detecting the presence or absence of foreign matter by reading the pellets conveyed and passing through a predetermined position with a CCD camera, and aspirating the pellets reaching a predetermined position downstream of the CCD camera a predetermined time after the foreign matter detection time. A foreign matter inspection apparatus comprising: a removing unit that removes from a turntable; and a collecting unit that sucks pellets at a predetermined position downstream of a removing position by the removing unit and collects the pellet from the turntable. Further, according to the present invention, in the above, the supply means,
A foreign matter inspection device having a vibrating screen for removing pellets having a predetermined length or more.

[0007]

1 to 9 show an embodiment of the present invention. FIG. 1 is a schematic diagram showing a configuration of a foreign matter inspection-colorimetry system, and FIG. 2 is a top view taken along a line A in FIG. FIG. 3 and FIG. 3 are schematic diagrams showing the color measurement mechanism in FIG. 1 in an enlarged manner. FIG. 4 is a block diagram showing a control circuit of the foreign substance inspection-color measurement system in FIG. 1, and FIGS. 8 is a flowchart showing a control procedure by the controller 95 of the foreign substance inspection apparatus, FIG. 8 is a flowchart showing a control procedure by the controller 97 of the color difference measuring apparatus in FIG. 4, and FIG. 9 is a multi-type in the foreign substance inspection-colorimetry system of FIG. FIG. 5 is an explanatory view showing a method for sequentially inspecting samples of FIG.

[1] Mechanism: As shown in FIG. 1, the foreign substance inspection-colorimetry system has a foreign substance inspection apparatus shown in a dashed-dotted frame, and a color difference measurement apparatus connected to the subsequent stage.

[1-1] Foreign particle inspection device: The foreign particle inspection device includes an ion air flow static eliminator 10, six detachable cups 11,
Sampler 12, vibrating screen 13, ion air flow static eliminator 14, supply hopper 21, trough 2 with cut-out adjustment function
Vibration feeder 23 provided with 31, electrostatic remover 25, turntable 31, CCD camera 41 provided with upper and lower lamp houses 43 and 45, suction device 5 provided with suction tube 51
3 and a suction tube 61.

The six cups 11 are detachably supported at equal intervals by a disk-shaped sampler 12. That is, the cups are detachably supported such that the centers of the bottom surfaces of the cups are arranged at equal intervals on the same circumference of the sampler 12. 6
Each of the cups has a label on which a cup number (container ID) for distinguishing from other cups and a bar code of the cup number are printed. The multi-product inspection method using the cup number will be described later.

A sampler 1 is provided below the six cups 11.
2 are provided. The sampler 12 has a function of supplying the pellets in the designated cup among the six cups onto the vibrating screen 13. That is, when any of the cups is designated by the controller 95 (FIG. 4), the sampler 1
2 is rotated to position the receptacle of the sampler 12 below the designated cup. Next, the gate for the designated cup is opened, and the pellets in the designated cup are supplied onto the vibrating screen 13 through the receptacle of the sampler 12. At this time, the designated cup is hit by a knocker (not shown) so that the pellets do not remain in the designated cup. The mechanism of the sampler 12 and the pendant box may be any as long as it can perform the above-described function, that is, the function of supplying the pellets in the cup designated by the controller 95 onto the vibrating screen 13. Therefore,
For example, a mechanism may be used in which the sampler 12 is fixed, and the designated cup is positioned above the receptacle of the sampler 12 by rotating the pendant box. The mechanism for removing the pellets in the cup may be a mechanism for inverting the cup or a mechanism for opening the bottom of the cup.

The vibrating screen 13 has a function of removing pellets longer than a certain size from the pellets supplied from the sampler 12 and dropping the remaining (pellets of a certain size or less) to the supply hopper 21. The removed large-sized pellets slide down on the vibrating screen 13 provided diagonally and are discharged out of the vessel. The vibrating screen 13 may be configured to be able to intermittently hit the knocker in order to better perform the size selection function described above. Further, in FIG. 1, the vibration type screen 13 has two stages, but may have one stage or three or more stages. In short, it is only necessary that long pellets can be removed and the remainder can be sent to the supply hopper 21. In the present system, the static electricity removing device 25 is provided in the vibration feeder 23 as described later. However, the static electricity removing device may be provided in the vibration type screen 13 instead of or together with the vibration feeder 23. .

The feed hopper 21 stores the pellets sent from the vibrating screen 13 and feeds the pellets to the vibrating feeder 2.
The function to send to 3 is performed. The supply hopper 21 is provided with a sensor (not shown) for detecting that the amount of the stored pellets has exceeded a predetermined amount. In addition, supply hopper 2
The inside 1 prevents the generation of static electricity by an ion air flow.

The vibrating feeder 23 has a function of transporting the pellets sent from the supply hopper 21 while vibrating the pellets, and sending the pellets from the trough 231 having a cutout adjusting function into the turntable groove 311 (FIG. 2) on the turntable 31. . The vibration feeder 23 is provided with an electrostatic remover 25 for removing static electricity.

The turntable 31 is a milk-white acrylic resin table which is rotated at a constant speed by a motor M. As shown in FIG. 2, an annular turntable groove 311 is formed near the periphery of the turntable. . Pellet is supplied into the turntable groove 311 from the trough 231 of the vibrating feeder 23 by a predetermined amount, and is conveyed clockwise in FIG. 2 to reach the position of the CCD camera 41. The table is provided with a pellet scattering prevention guide (not shown).

The CCD camera 41 is mounted on the turntable groove 3.
The pellets conveyed through the inside 11 are illuminated by the strobes in the upper and lower lamp houses 43 and 45 to be imaged, and the photographed images are analyzed by an image processor (FIG. 4) to be included in the foreign substances and the pellets. This is an instrument for detecting foreign substances (foreign substances of a predetermined size or more). In the case of the present system, a foreign substance is a pellet having a black or brown colored portion, and includes a mixed pellet of a different kind. The CCD camera 41 is provided with an outlet for an ion air flow so that powder does not adhere to the camera. The timing of imaging is given by a trigger from the controller 95, and the light emission cycle and light emission intensity of the strobe are appropriately switched according to the type of the pellet to be inspected. A method of determining what kind of pellet is currently being inspected will be described later.

At the downstream side of the CCD camera 41 (downstream in the direction of rotation of the turntable 31), a suction port of a suction pipe 51 for removing defective products is opened, whereby foreign matters detected by the CCD camera 41 are detected. Is removed. That is, CCD
When a foreign substance is detected by the analysis of the image taken by the camera 41, the suction device 53 is turned on at the timing when the pellet containing the foreign substance reaches the position of the suction port of the suction pipe 51,
The pellet containing the foreign matter is removed from the turntable groove 311.

Further, on the downstream side of the suction pipe 51, a suction port of a suction pipe 61 for collecting pellets (good products) is opened, and the pellet after removing foreign matter is sucked and collected by the suction pipe 61. Is sent to the color difference measuring device at the subsequent stage.

[1-2] Color difference measuring device: The color difference measuring device includes a cyclone 62, a static eliminator 69, a hopper 63, an upper shutter 64, a cell 65, a lower shutter 66, a discharge pipe 67, an integrating sphere 71, and a light source 72. , A light projecting lens 73, a reflecting mirror 74, a light receiving lens 76, a light receiver 75, and the like.

The pellets sucked by the suction pipe 61 from above the turntable 31 are put into the upper part of the cyclone 62. In front of the cyclone 62, an electrostatic remover 69 for removing static electricity is provided. This allows
The pellets falling in the cyclone 62 are neutralized, and the powder adhering to the pellets is discharged out of the cyclone 62.

An ion air flow neutralizer 70 and a hopper 63 are provided below the cyclone 62, and pellets are filled into the translucent cell 65 via the hopper 63. Initially, the lower shutter 66 at the lower end of the cell 65 is closed, and the upper shutter 64 at the upper end of the cell 65 is open. When the cells 65 are filled with the pellets, the upper shutter 64 is closed and the colorimetry is started. The filling of the cell 65 with the pellet is detected by a sensor (not shown) provided near the lower portion of the hopper 63. The color measurement is performed a plurality of times for the same sample, and the average is obtained. When the color measurement is completed, the lower shutter 66 is opened, and the sample is discharged through the discharge pipe 67. Thereafter, the ion air flow static eliminator 7 provided on the hopper 63
0 is operated by the controller 97, ionized air flows into the cell 65, and powder adhering to the cell is
Let it drain out.

In the colorimetry, the light emitted from the light source (lamp) 72 is guided into the integrating sphere 71 through the light projecting lens 73, and is repeatedly reflected on the inner surface of the integrating sphere 71 to thereby diffuse light in all directions. And the cell 6 that is transmissive with the diffused light in all directions.
This is performed by uniformly illuminating the pellets in 5 and forming an image of the reflected light on a light receiver 75 via a light receiving lens 76. Reference numeral 74 denotes a conical reflecting mirror that reflects light emitted through the light projecting lens 73 toward the inner surface of the integrating sphere 71. Reference numeral 77 denotes a lens holder for holding the light receiving lens 76, and 79 denotes a light receiver 7 prior to the start of colorimetry.
5 is a standard white plate for adjusting the reference value of
5 is provided at the front position so as to be able to advance and retreat as indicated by an arrow.

The light receiver 75 has a light receiving element for outputting an electric signal corresponding to the amount of received light (the amount of light reflected from the pellet), and a light receiving circuit for processing an output signal of the light receiving element. A plurality of types of filters that transmit light near specific wavelengths different from each other (eg, near red, near green, and near blue) are arranged in front of the light receiver 75, and light transmitted through each of the filters is received and an electric signal is received. Is output, and colorimetry is possible by estimating the relationship between the electric signals. The color system in which the colorimetric result is obtained is not limited. For example, in this system, the YI value, X
YZ, Lab and L * a * b * are used.

The output signal of the light receiver 75 based on the reflected light from the pellet filled in the cell 65 is measured in advance for a large number of samples, and the resin plate is formed by using the large number of samples after the measurement. By measuring the color of each resin plate, it is possible to create data that associates the output signal of the light receiver 75 with the color of the resin plate. By storing this data, the color of the resin molded product (the resin molded product formed using the pellets in the cell 65) can be obtained from the output signal of the light receiver 75.

Data (output signal-resin plate color association data) is created for a large number of types of pellets as described above, and the color of the resin molded product is determined from the output signal of the light receiver 75 with reference to the data. As a result, for all varieties,
The result was in good agreement with the color of the resin molded product actually molded using the pellets after the measurement. That is, by referring to the association data created as described above, the result was obtained that the colorimetry management using the pellets was possible.

[2] Inspection procedure: A multi-product inspection method will be described with reference to FIG. In addition, a foreign substance inspection procedure will be described with reference to FIGS. 5 to 7, and a color measurement procedure will be described with reference to FIG.

[2-1] Multi-product inspection system: When production of a certain product is instructed by an operator, the host computer 91 adds a production instruction number (ID) to the computer of the production department and adds the production instruction number (ID). A production instruction for the type is issued, and an inspection instruction number (ID) is added to the computer of the inspection section (the high-order computer 93 in FIGS. 1 and 9) to issue an inspection instruction for the type. Further, a label on which the inspection instruction number (ID) and the product name (or a sample number or the like) may be printed in human-readable characters and the inspection instruction number (ID) is printed as a bar code is printed out. In the above, the production instruction number (I
D) and the inspection instruction number (ID) are a common number (ID).

In the inspection department, the operator puts the pellet corresponding to the type name or sample number printed on the label into any one of the cups 11 and the bar code (inspection instruction number) printed on the label. (ID)
And the barcode (cup number (ID)) of the label attached to the cup 11 is read by a barcode reading device and input to the computer 93 of the inspection department. As a result, the computer 93 of the inspection section performs the inspection /
The production instruction number (ID) and the inspection / production instruction number (I
D) is associated with the cup number (ID) in which the designated variety is put. In this example, the inspection instruction number (ID) and the cup number (ID) are associated by barcode input, but may be associated by a method other than a barcode, for example, a method of inputting from a touch panel.

Thus, the inspection / production instruction number (ID)
And the cup number (ID) in which the designated variety was inserted
Are associated with each other, the computer 93 of the inspection department
According to the inspection instruction (instruction including an inspection instruction number (ID), an inspection item, an inspection type, an inspection mode, etc.) from the host computer 91, the inspection of the pellets in the cup associated with the inspection instruction as described above is performed. (E.g., foreign substance inspection, colorimetry, etc.) are executed by the inspection apparatus under the jurisdiction. Therefore,
Associating a plurality of cups with different production / inspection instructions,
In addition, by inputting and setting samples corresponding to the respective production / inspection instructions in each cup, it is possible to continuously execute each inspection for production of multiple types while distinguishing each type. Become.

The inspection result for each cup inspected as described above is associated with the corresponding inspection instruction number (ID) as the inspection result for the corresponding inspection instruction, and transmitted from the computer 93 of the inspection department. It is returned to the host computer 91. Based on this, the host computer 91 instructs the computer of the corresponding production department whether to execute production (when the defect rate is lower than a predetermined threshold) or to exchange pellets without producing. This has the effect of preventing production of defective products at the production site. In the above description, the inspection items and the inspection modes are transmitted from the host computer 91. Instead, the data of the inspection items and the inspection modes are stored in the host computer 93 in association with the inspection types. Inspection items and inspection modes may be determined according to the type of product transmitted in association with the production / inspection instruction number (ID).

[2-2] Foreign matter inspection procedure: The foreign matter inspection procedure will be described in accordance with the processing by the controller 95 of the foreign matter inspection apparatus shown in FIGS. The host computer 93 associates the production / inspection instruction number (I) with the cup number (ID).
D), a product number, a sample number, and the like are input. Here, the production / inspection instruction number (ID) and the product type number and / or sample number are transmitted from the host computer 91 to the host computer 93. In the host computer 91, a label on which the product type number and / or the sample number are printed in human-readable characters and on which a barcode indicating the production / inspection instruction number (ID) is printed is printed out. The operator puts a sample of the pellet corresponding to the type number and / or sample number of this label into an arbitrary cup, and affixes the barcode of the printed label and the cup into which the sample is put in advance. The upper computer 93 reads the barcode of the label in association with the
The cup number (ID) of the cup into which the sample is placed,
A production / inspection instruction number (ID), a product number, and / or a sample number are input in association with each other. The data input in this manner is transmitted from the host computer 93 to the
It is input to the controller 95 of the foreign substance inspection device (S0
1).

In step S03, the operation PBL (the touch panel 95a) in the local mode or the remote mode is performed.
(FIG. 4) upper switch) is on standby. The local mode is a mode for operating the foreign substance inspection-colorimetry system separately from the host computer 91, and the remote mode is a mode for operating the foreign substance inspection-colorimetry system in accordance with an instruction from the host computer 91. Operations or processes in both modes are substantially the same except for step S01. The local mode is a mode provided to enable the operation of the foreign substance inspection-colorimetry system even when a failure occurs in communication with the host computer 91 or the like.

When the operation PBL is turned on in the local mode or the remote mode (S03: YES), on condition that the READY signal from the controller 97 of the color difference measuring device is on (S05: YES), in other words,
Provided that the color difference measurement device is in the ready state,
Steps S11 to S19 are executed.

That is, the previous data is initialized, and "green" is lit as a signal indicating the current state (S11). Next, the sampler 12 is rotated, and the receptacle is set at the position of the cup with the cup number (ID) associated with the currently executed production / inspection instruction number (ID) (S13). Further, when a predetermined time counted by the timer elapses, a command is issued to open the gate of the cup with the cup number (ID) (S15). As a result, the pellets in the cup having the cup number (ID) are dropped onto the vibrating screen 13. Next, the knocker is operated intermittently for a predetermined time after a predetermined time measured by the timer has elapsed (S17). Thereby, among the pellets on the vibrating screen 13, pellets having a size equal to or less than a predetermined length pass through the vibrating screen 13 and are stored in the supply hopper 21. Thereafter, it is instructed that the gate of the cup with the cup number (ID) should be closed (S19).

In step S21, the presence or absence of pellets in the supply hopper 21 is checked. In other words, the contents (pellet) of the cup with the cup number (ID) associated with the currently executed production / inspection instruction number (ID) are supplied to the supply hopper 21 by the processing in steps S13 to S17 described above.
However, if the operator forgets to put the pellets in the cup of the cup number (ID) before step S03, there is no pellet in the supply hopper 21. In this case, (S21: N
O), the fact that there is no pellet is displayed on the touch panel 95a, and the process returns to the step S03.

In step S31, a preliminary operation before the start of the inspection is performed. That is, rotation of the turntable 31 is started, and light emission of the strobe is started. At the time of inspection, the light emission amount and the cycle of the strobe are appropriately switched and set according to the type of the inspection object currently being executed. further,
The remaining pellets on the turntable 31 are removed by a scraper (not shown), and dirt is checked.
If there is dirt, the suction device 53 is operated to clean the dirt on the turntable 31.

In step S33, the operation of supplying the pellets is started. That is, the supply hopper 21, the vibration feeder 2
3. The static eliminator 25 is turned on. As a result, the pellets in the supply hopper 21 are supplied onto the vibrating feeder 23, are conveyed on the vibrating feeder 23, and are fed from the trough 231 by a predetermined amount in the turntable groove 3 of the turntable 31.
11 is cut out. Further, while being conveyed on the vibrating feeder 23, the static electricity removing device 25 using the ion air flow is used.
, Whereby the powder adhering to the pellets is removed.

In step S35, an operation signal is output to the controller 97 of the color difference measuring device. Thereby, the color difference measuring device is activated. In response to the operation signal, a BUSY signal is returned from the controller 97 of the color difference measuring device.

In step S37, a foreign substance inspection is performed.
That is, a strobe range (light emission cycle, light emission amount) is set according to the type of the test currently being executed, and an image pickup trigger is output to the image processing unit at each image pickup timing. Also,
Data such as foreign matter received from the image processing circuit of the image processing unit is integrated and displayed on the touch panel. When a foreign substance is detected, a predetermined time after the detection time (the time when the foreign substance reaches the position of the suction port of the suction pipe 51 on the downstream side).
Then, the suction device 53 is operated to suck and remove the detected foreign matter. In addition, the non-defective product after the removal of the foreign matter is sucked and collected by the suction pipe 61 and sent to the next-stage color difference measuring device.

In the foreign matter inspection process in step S37, after the pellets in the supply hopper 21 are exhausted, a predetermined time measured by a timer (when the last pellet in the supply hopper 21 is sent out and the suction position by the suction pipe 61 is reached). (S39: Y)
ES → S37).

At the time when the last pellet in the supply hopper 21 should reach the suction position by the suction pipe 61,
The next inspection is checked. That is, an unexecuted production / inspection instruction number (ID) different from the production / inspection instruction number (ID) that has been executed up to the present time is set to the host computer 9
It is checked from step 3 whether the data has been input to the controller 95 of the foreign substance inspection apparatus. As a result, if there is (S
41: YES), the process returns to the step S13, and the above-mentioned processing is executed for the above-mentioned unexecuted production / inspection instruction number (ID). As a result, the above-mentioned “[2-1] Multi-product inspection method” is realized.

If there is no next inspection in step S41,
That is, an unexecuted production / inspection instruction number (ID) different from the production / inspection instruction number (ID) that has been executed until now.
Is not input from the host computer 93 to the controller 95 of the foreign matter inspection device (S41: NO), the operation sections are stopped, the inspection result is sent to the host computer 91 via the host computer 93, and the color difference measurement device After the end processing (S43) for turning off the operation signal output to the controller 97 is executed, the inspection result is printed out from the printer 95b (S45),
"Yellow" indicating the end of the test is lit on the signal (S4
7).

[2-3] Color difference measurement (colorimetry) procedure: The color difference measurement (colorimetry) procedure will be described in accordance with the processing by the controller 97 of the color difference measurement apparatus shown in FIG. In step S51, warm-up is performed to stabilize the amount of light emitted from the light source (lamp) 72 and the characteristics of the light receiver 75. When the warm-up is completed, the controller 95
An EADY signal is sent (S53, see S05 in FIG. 5). Thereafter, an operation signal (see S35 in FIG. 6) from the controller 95 of the foreign substance inspection device is awaited (S5).
5).

When an operation signal is received from the controller 95 of the foreign substance inspection apparatus (S55: YES), preparation processing for receiving pellets from the suction pipe 61 of the foreign substance inspection apparatus is performed. That is, the cyclone 62 and the static eliminator 69 are turned on (S57).

When the pellets filled from the cyclone 62 through the hopper 63 overflow from the cell 65 and the sensor provided near the lower end of the hopper 63 is turned on (S6).
1: YES), colorimetry is started (S63). In this color measurement, the color of the pellet in the cell 65 is measured based on the output of the light receiver 75 with reference to the association data stored in the association data storage unit. That is, the color of the resin plate when the resin plate is prepared using the pellets in the cell 65 is measured. This measurement is repeatedly performed a preset number of times (for example, three times).

If the operation signal from the controller 95 of the foreign object detecting device is continuously detected after the set number of colorimetric measurements has been completed (S67: NO), step S67 is performed.
Return to 61. Thereby, the color measurement is similarly performed on the pellets filled in the cell 65 next.

In step S67, if the operation signal from the controller 95 of the foreign object detection device is not detected (S67: NO), the end process (S43 in FIG. 7) is executed on the foreign object inspection device side. Therefore, the result of the measurement and / or the result of the pass / fail judgment is transmitted to the host computer 91 via the computer 93 (S71).

[0048]

According to the present invention, since the static electricity is removed when the pellets are transported before the inspection, it is possible to eliminate the problem caused by the powder adhering to the pellets, and it is possible to accurately inspect the pellet samples for foreign substances. .

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a configuration of a foreign substance inspection-pellet color measurement system.

FIG. 2 is a top view of the foreign substance inspection device (A in FIG. 1).

FIG. 3 is a schematic diagram showing a configuration of a main part of the pellet colorimeter.

FIG. 4 is a block diagram illustrating a configuration of a control unit of the foreign substance inspection-pellet colorimetry system.

FIG. 5 is a part of a flowchart showing a control procedure of a controller of the foreign substance inspection device.

FIG. 6 is a part of a flowchart showing a control procedure of a controller of the foreign substance inspection device.

FIG. 7 is the remaining part of the flowchart showing the control procedure of the controller of the foreign substance inspection device.

FIG. 8 is a flowchart showing a control procedure of a controller of the pellet colorimeter.

FIG. 9 is a block diagram showing a configuration of a multi-product inspection system.

[Explanation of Signs] 10 Ion air flow static eliminator 11 Cup (6 stations) 12 Sampler 13 Vibrating screen 14 Ion air flow static eliminator 21 Supply hopper (foreign matter inspection section) 23 Vibration feeder 231 Trough (with cutting-out adjustment function) 25 Static Electrostatic remover 31 Turntable 311 Turntable groove 41 CCD camera 43 Upper lamphouse 45 Lower lamphouse 51 Suction tube (removal of defective product) 53 Suction device 61 Suction tube (recovery of good product) 62 Cyclone 63 Colorimeter hopper 64 Upper shutter 65 Cell 66 Lower shutter 67 Discharge tube 69 Static eliminator 70 Ion air flow static eliminator 71 Integrating sphere 72 Light source (lamp) 73 Floodlight lens 74 Reflector mirror (conical shape) 75 Light receiver 76 Light receiving lens 77 Light receiving lens holder 79 Standard plate

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor I-Kobayashi 1-18-1 Kyobashi, Chuo-ku, Tokyo Techno Polymer Co., Ltd. F-term (reference) 2G051 AB02 AB20 BB11 CA03 CA04 CC11 CD07 DA01 DA08 DA13 DA17 EA11 EA17 EB01 4D021 AA03 CA06 DB06 EA10

Claims (1)

[Claims] 1. A foreign matter inspection apparatus having means for supplying pellets to a turntable, means for detecting foreign matter in the pellets at a predetermined position by a video camera, and means for removing and recovering the pellets in which foreign matter is detected from the turntable. Before the inspection, means for removing static electricity charged on the pellets by the ion air flow to remove powder attached to the pellets and a vibrating screen for removing pellets having a predetermined size or more are provided. Characteristic foreign matter inspection device.