WO2020054574A1 - Inspection method and inspection device - Google Patents
Inspection method and inspection device Download PDFInfo
- Publication number
- WO2020054574A1 WO2020054574A1 PCT/JP2019/034996 JP2019034996W WO2020054574A1 WO 2020054574 A1 WO2020054574 A1 WO 2020054574A1 JP 2019034996 W JP2019034996 W JP 2019034996W WO 2020054574 A1 WO2020054574 A1 WO 2020054574A1
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- WIPO (PCT)
- Prior art keywords
- crumb
- temperature
- polymer
- excess moisture
- detected
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000007689 inspection Methods 0.000 title claims abstract description 19
- 229920000642 polymer Polymers 0.000 claims abstract description 46
- 238000005259 measurement Methods 0.000 claims description 12
- 238000000465 moulding Methods 0.000 abstract description 17
- 230000018044 dehydration Effects 0.000 abstract description 15
- 238000006297 dehydration reaction Methods 0.000 abstract description 15
- 238000001035 drying Methods 0.000 abstract description 15
- 238000005516 engineering process Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- 229920001971 elastomer Polymers 0.000 description 11
- 239000005060 rubber Substances 0.000 description 11
- 239000000047 product Substances 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 238000012795 verification Methods 0.000 description 8
- 239000005062 Polybutadiene Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 229920002857 polybutadiene Polymers 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 238000006116 polymerization reaction Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000012958 reprocessing Methods 0.000 description 3
- 229920003051 synthetic elastomer Polymers 0.000 description 3
- 239000005061 synthetic rubber Substances 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
- 229920005549 butyl rubber Polymers 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 229920003049 isoprene rubber Polymers 0.000 description 2
- 229920003052 natural elastomer Polymers 0.000 description 2
- 229920001194 natural rubber Polymers 0.000 description 2
- 229920001084 poly(chloroprene) Polymers 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 229920000800 acrylic rubber Polymers 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 229920005560 fluorosilicone rubber Polymers 0.000 description 1
- 229920002681 hypalon Polymers 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010063 rubber manufacturing process Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/44—Resins; Plastics; Rubber; Leather
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/56—Investigating or analyzing materials by the use of thermal means by investigating moisture content
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Definitions
- the present invention is a technique for inspecting the presence or absence of moisture in a crumb-like polymer supplied and transferred.
- a butadiene solution as a raw material is prepared, a catalyst is added, and polymerization is performed to obtain a polymer solution (polymerization step).
- the obtained polymer solution is subjected to steam treatment, and a polymer in the form of a crumb slurry is recovered (solvent removing step).
- the polymer containing water is dehydrated by an extruder, and dried by hot air or the like to form a dry crumb (dehydration / drying step).
- the crumb-shaped polymer is compressed and molded (molding step).
- grains having a particle size of about 3 to 10 mm generated in the process of producing synthetic rubber are called crumbs.
- the present invention relates to a molding process.
- the molding process will be described in more detail.
- a crumb-shaped or powdered semi-finished product is a press-formed product (usually referred to as a veil, hereinafter referred to as a veil) having a rectangular parallelepiped shape by a press molding machine (usually referred to as a baler, hereinafter referred to as a baler). ).
- the crumb-shaped polymer is automatically weighed and adjusted to the specified weight range. It is molded into a bale in the specified weight range, the weight is checked, and the rubber veil is covered with a thin film wrapper such as polyethylene film or polystyrene film, and a plurality of containers are stored in storage containers such as containers and shipped to users. You.
- the bale is melted or dissolved, vulcanized and processed on the user side.
- Patent Literature 1 by using an infrared transmitting transparent plate having a smooth surface and pressing rubber while irradiating infrared light to the sample rubber through the transparent plate, the water content of the sample rubber can be reduced in a short time, and Techniques that can measure accurately have been proposed.
- the inventor of the present application has studied the mechanism of excess moisture remaining, and as a result, it is difficult to predict whether excess moisture remains or not, and it is difficult to predict that the moisture content of the sample rubber is equal to or less than a predetermined value. On the basis, it can be difficult to conclude that the product veil does not contain excess moisture.
- the present invention has been made in view of the above problems, and has as its object to provide an inspection technique capable of detecting excess moisture after a dehydration / drying step and before molding.
- the present invention for solving the above-mentioned problems is an inspection method for continuously supplying a crumb-like polymer that has been polymerized and dehydrated and dried, and detects crumbs containing excess moisture in the crumb-like polymer.
- the temperature of the crumb-like polymer is measured, and the crumb containing excess moisture is detected based on the temperature difference.
- the temperature at each measurement point is measured, the average temperature of a plurality of measurement points is obtained, and the crumb corresponding to the measurement point having a temperature lower than the average temperature is obtained. Is detected.
- a crumb corresponding to a measurement point having a temperature difference from the average temperature of 9.5 ° C. or more is detected.
- the average temperature of the polymer when the dehydrated and dried crumb-like polymer is supplied is 40 to 70 ° C.
- the crumb containing excess moisture is in a lump.
- the crumb containing excess moisture has a moisture content of 1% by mass or more.
- the present invention for solving the above-mentioned problems is a supply means for continuously supplying a polymerized, dehydrated and dried crumb-shaped polymer, a temperature measuring means for measuring the temperature of the crumb-shaped polymer supplied from the supply means, A determination means for calculating a temperature difference from the average temperature using the temperature measurement means and detecting a crumb containing excess moisture based on the temperature difference.
- the excess moisture inspection means is a thermographic camera.
- the present invention can detect excess moisture after the dehydration / drying step and before molding.
- FIG. 1 is a system configuration diagram according to an embodiment of the present invention.
- 4 is a verification test result that is a basis for the basic concept of the present invention. It is a detection example concerning one embodiment of the present invention.
- FIG. 1 is a system configuration diagram according to an embodiment of the present invention.
- the system includes a continuous supply unit, an excess moisture inspection unit, a bale-equivalent weight measuring unit, a bale forming unit, a carrying-out unit, and a control unit, and performs a series of operations.
- the continuous supply means is, for example, the vibration feeder 1. After the polymerization, the vibration feeder 1 continuously supplies the crumb-shaped polymer 2 that has undergone the dehydration / drying step 8 to the system.
- the excess moisture inspection means is, for example, a thermographic camera 3.
- the thermographic camera 3 is provided on the vibrating feeder 1 and detects excess moisture by detecting temperature rise due to insufficiently dried crumbs (described later in detail).
- the veil-equivalent weight measuring means is, for example, a weighing device 6 having a hopper.
- the hopper is provided between the continuous feeding means and the bale forming means.
- the hopper has an upper hopper and a lower hopper. The operations of the upper hopper and the lower hopper are controlled, and the weight of the crumb-like polymer accumulated in the hopper by the weighing device 6 is measured to measure the weight of the crumb-like polymer equivalent to the veil.
- the bale forming means is, for example, a pressure forming machine (baler) 7.
- the crumb-shaped polymer measured by the bale-equivalent weight measuring means is supplied and pressed to form a veil.
- the unloading means is, for example, the conveyor 14.
- a weight measuring device 15 is provided in the middle of the conveyor 14.
- the control device 30 inputs the excess moisture inspection information from the excess moisture inspection means 3 and the bale weight information from the weight measuring device 15 and performs sorting control. In other words, no excess moisture is detected, and a bale having a weight in a normal range is carried out to the next step (packing step) 9 as a regular product 12, and a veil in which excess moisture is detected and / or a weight outside the normal range is removed. It is removed as a nonstandard product 13 and sent to another process 10 (reprocessing).
- FIG. 2 shows verification test results that are the basis of the basic concept of the present invention.
- the vertical axis in FIG. 2 is the moisture content (mass%) of crumb, and the horizontal axis is a numerical value obtained from [(WP surface temperature) ⁇ (average crumb temperature)].
- the WP surface temperature is a measured temperature of a portion of the crumb that is assumed to contain excess moisture
- the crumb average temperature is an average temperature of a plurality of measurement points.
- the average temperature of the crumb-like polymer continuously supplied to the molding step via the dehydration / drying step is 40 to 70 ° C. More specifically, in a verification test performed in winter, the average temperature of the crumb-shaped polymer was 48.8 ° C., whereas in a verification test performed in summer, the average temperature of the crumb-shaped polymer was 60.80 ° C. 7 ° C.
- the average outside temperature in winter at the verification test site is around 6 ° C, and the average outside temperature in summer is around 26 ° C.
- the average temperature of the crumb-like polymer after the dehydration / drying step is affected by the ambient temperature.
- crumbs containing excess water tended to form lumps.
- the portion of the mass containing excess moisture was defined as WET POINT (WP). While the crumb after the dehydration / drying step is relatively hot, crumbs containing excess moisture take away the heat of the crumb when the moisture evaporates, or the temperature is less likely to rise due to the addition of excess moisture. It is supposed to be.
- the crumb surface temperature is 48.8 ° C and the WP is 35.4 ° C (the temperature difference between the crumb surface temperature and the WP is 13.4 ° C) in winter, and the crumb surface temperature is 60.7 ° C and WP47. 4 ° C. (13.3 ° C. between the crumb surface temperature and the WP).
- ⁇ Detection of crumb (WET POINT) containing excess water ⁇ WET POINT is detected based on the temperature difference. More specifically, a WET POINT can be detected by determining an average temperature of a plurality of measurement points of the crumb and setting a measurement point having a temperature lower than the average temperature as a WET POINT.
- WET POINT By setting a measurement point portion having a difference from the average temperature of 9.5 ° C. or more as WET POINT, WET POINT can be detected with higher accuracy.
- the average temperature of a pea crumb can be determined, for example, by the following method.
- Fig. 3 shows an example of temperature measurement.
- the temperature measuring means is a thermographic camera. Imaging at 30 frames / sec is possible.
- thermographic camera 3 for example, CPA-L25B manufactured by Chino can be used.
- the crumb is photographed and imaged by a thermographic camera, and the temperature of each image in each image is measured in a pixel range (dotted line in the drawing) corresponding to a predetermined range (eg, 600 mm ⁇ 500 mm).
- the average temperature of the crumb can be obtained from the measured temperature of each pixel.
- the measuring point is preferably 100 to 100,000, more preferably 1,000 to 100,000, and particularly preferably 10,000 to 100,000.
- WET POINT can be detected with high accuracy.
- WET @ POINT is detected by extracting a low-temperature pixel having a temperature lower than a predetermined value (for example, 9.5 ° C.) from the average temperature.
- Small pieces containing water may be peeled off by some kind of cutting, and mixed into crumbs supplied to the next step (molding step).
- the present application is suitable for detecting WET POINT, the present invention is not limited to crumb lumps but can be applied to crumbs.
- the general crumb particle size is 3 to 10 mm.
- a particle size of 20 mm or more is called a crumb lump.
- the excess moisture can be detected after the dehydration / drying step and before bale molding. As a result, excess moisture inside the bale can also be detected.
- the crumb-shaped polymer has tackiness, and the particles tend to stick to each other. As a result, the particle size becomes uneven and the behavior is hard to predict. A complicated mechanism is required to remove the crumb-like polymer containing excess moisture in the falling trajectory to the baler. On the other hand, if the veil containing excess moisture is removed after bale molding, it can be easily and reliably removed.
- thermographic camera no configuration or process other than the thermographic camera and simple control is required. Excess moisture can be easily and reliably detected without adding a new configuration or a new process to an existing manufacturing process. It does not affect product quality.
- the crumb-like polymer to be veiled is a vulcanizable rubber such as natural rubber (NR), isoprene rubber (IR), styrene butadiene rubber (SBR), butadiene rubber (BR), chloroprene rubber (CR), butyl rubber (IIR), nitrile rubber (NBR), ethylene / propylene rubber (EPM, EPDM), chlorosulfonated polyethylene rubber (CSM), acrylic rubber (ACM), urethane rubber (U), silicone rubber (VMQ) , PVMQ, FVMQ), fluoro rubber (FKM), polysulfide rubber (T) and the like.
- the present invention is most suitably applied to butadiene rubber (BR). In the verification test, butadiene rubber was used.
- the average temperature of the crumb-like polymer continuously supplied to the molding step via the dehydration / drying step is 40 to 70 ° C.
- the average temperature was 48.8 ° C.
- the average temperature was 60.7 ° C.
- the water content of the crumb-like polymer was examined. Crumbs near or above average have very low moisture content.
- the temperature of the crumb was lower than the average, especially when the temperature difference from the average temperature was 9.5 ° C. or more, the water content was remarkably high.
- the temperature of the mass of the crumb containing excess moisture was 35.4 ° C.
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Abstract
Description
本願発明は、過剰水分による温度差に着目したものである。図2は、本発明の基本概念の根拠となる検証試験結果である。図2の縦軸は、クラムの含水率(質量%)であり、横軸は、[(WP表面温度)-(クラムの平均温度)]から求めた数値である。ここで、WP表面温度とは、クラムにおいて過剰水分を含んでいると想定した部分の測定温度であり、クラム平均温度とは複数の測点の平均温度である。 ~ Basic concept of the present application ~
The present invention focuses on the temperature difference due to excess moisture. FIG. 2 shows verification test results that are the basis of the basic concept of the present invention. The vertical axis in FIG. 2 is the moisture content (mass%) of crumb, and the horizontal axis is a numerical value obtained from [(WP surface temperature) − (average crumb temperature)]. Here, the WP surface temperature is a measured temperature of a portion of the crumb that is assumed to contain excess moisture, and the crumb average temperature is an average temperature of a plurality of measurement points.
WET POINTは、温度差に基づいて検出される。より具体的には、クラムの複数の測点の平均温度を求め、平均温度より低い温度の測点部分をWET POINTとして設定することで、WET POINTを検出することができる。 ~ Detection of crumb (WET POINT) containing excess water ~
WET POINT is detected based on the temperature difference. More specifically, a WET POINT can be detected by determining an average temperature of a plurality of measurement points of the crumb and setting a measurement point having a temperature lower than the average temperature as a WET POINT.
脱水/乾燥工程を経ることにより、過剰水分を有するクラムは発生しないのが前提である。にもかかわらず、実際には、過剰水分を有するクラムが発生する。そのメカニズムについて考察した。 -Estimation of excess moisture generation mechanism-
It is premised that crumbs having excessive moisture do not occur through the dehydration / drying step. Nevertheless, in practice crumbs with excess moisture are generated. The mechanism was discussed.
クラムの特徴として、クラムに粘着性があり、互いにくっつきやすく、クラム塊になりやすいと推測される。過剰水分を含むクラム塊が混入することにより、WET POINTが発生するものと推測される。 ~ About crumb lump ~
As a characteristic of the crumb, it is presumed that the crumb is sticky, easily adheres to each other, and easily forms a crumb mass. It is presumed that WET POINT is generated due to the inclusion of crumb lumps containing excess moisture.
上記により、脱水/乾燥工程の後、ベール成型前に過剰水分を検出できる。その結果、ベール内部の過剰水分も検出できる。 ~ Effect ~
As described above, the excess moisture can be detected after the dehydration / drying step and before bale molding. As a result, excess moisture inside the bale can also be detected.
ベールにされる対象のクラム状のポリマーとしては、加硫可能なゴムであって、例えば天然ゴム(NR)、イソプレンゴム(IR)、スチレンブタジエンゴム(SBR)、ブタジエンゴム(BR)、クロロプレンゴム(CR)、ブチルゴム(IIR)、ニトリルゴム(NBR)、エチレン・プロピレンゴム(EPM、EPDM)、クロロスルホン化ポリエチレンゴム(CSM)、アクリルゴム(ACM)、ウレタンゴム(U)、シリコーンゴム(VMQ、PVMQ、FVMQ)、フッ素ゴム(FKM)、多硫化ゴム(T)等が挙げられる。特に、本発明に関しては、ブタジエンゴム(BR)への適用が最適である。検証試験ではブタジエンゴムを用いた。 ~ Clam-like polymer of interest ~
The crumb-like polymer to be veiled is a vulcanizable rubber such as natural rubber (NR), isoprene rubber (IR), styrene butadiene rubber (SBR), butadiene rubber (BR), chloroprene rubber (CR), butyl rubber (IIR), nitrile rubber (NBR), ethylene / propylene rubber (EPM, EPDM), chlorosulfonated polyethylene rubber (CSM), acrylic rubber (ACM), urethane rubber (U), silicone rubber (VMQ) , PVMQ, FVMQ), fluoro rubber (FKM), polysulfide rubber (T) and the like. In particular, the present invention is most suitably applied to butadiene rubber (BR). In the verification test, butadiene rubber was used.
脱水/乾燥工程を経て成型工程に連続的に供給されるクラム状のポリマーの平均温度は40~70℃である。たとえば、冬季に行なった検証試験では、平均温度48.8℃であったのに対し、夏季に行なった検証試験では、平均温度60.7℃であった。このときのクラム状のポリマーの含水率を調べた。平均値付近や平均より高温のクラムでは、極めて低い含水率である。一方、平均より低温のクラム、特に、平均温度との温度差が9.5℃以上の場合、顕著に高い含水率であった。一例として過剰水分を含むクラムは塊の温度を測定すると、冬季35.4℃(温度差13.4℃)、夏季47.4℃(温度差13.3℃)であった。この結果から、クラム状のポリマーの温度を測定して、温度差に着目することにより、外気温に依存せず、確実に過剰水分を含むクラムを検出可能である。 ~ Summary ~
The average temperature of the crumb-like polymer continuously supplied to the molding step via the dehydration / drying step is 40 to 70 ° C. For example, in a verification test performed in winter, the average temperature was 48.8 ° C., whereas in a verification test performed in summer, the average temperature was 60.7 ° C. At this time, the water content of the crumb-like polymer was examined. Crumbs near or above average have very low moisture content. On the other hand, when the temperature of the crumb was lower than the average, especially when the temperature difference from the average temperature was 9.5 ° C. or more, the water content was remarkably high. As an example, the temperature of the mass of the crumb containing excess moisture was 35.4 ° C. in winter (temperature difference 13.4 ° C.) and 47.4 ° C. in summer (temperature difference 13.3 ° C.). From this result, by measuring the temperature of the crumb-shaped polymer and paying attention to the temperature difference, it is possible to reliably detect the crumb containing excess moisture without depending on the outside air temperature.
2 ゴムクラム
3 サーモグラフカメラ
6 ホッパー付計量装置
7 ベーラー(加圧成型機)
8 脱水/乾燥工程
9 包装工程
10 再処理工程
11 異常検知信号
12 正規品(製品)
13 規格外品
14 コンベア
15 重量計測装置
30 制御装置 DESCRIPTION OF
8 Dehydration /
13
Claims (9)
- 重合し脱水乾燥したクラム状のポリマーを連続的に供給し、
前記クラム状のポリマー内の過剰水分を含むクラムを検出する
ことを特徴とする検査方法。 Continuous supply of crumb-like polymer that has been polymerized and dehydrated and dried,
An inspection method, wherein a crumb containing excess moisture in the crumb-like polymer is detected. - 前記クラム状のポリマーの温度を測定し、
温度差に基づいて過剰水分を含むクラムを検出する
ことを特徴とする請求項1記載の検査方法。 Measuring the temperature of the crumb-like polymer,
The inspection method according to claim 1, wherein a crumb containing excess moisture is detected based on the temperature difference. - 連続的に供給されるクラム状のポリマーに対し、測点ごとの温度を測定し、
複数の測点の平均温度を求め、
平均温度より低い温度の測点に対応するクラムを検出する
ことを特徴とする請求項2記載の検査方法。 For crumb-like polymer supplied continuously, measure the temperature at each measurement point,
Find the average temperature of multiple measurement points,
The inspection method according to claim 2, wherein a crumb corresponding to a measurement point at a temperature lower than the average temperature is detected. - 前記平均温度との温度差が9.5℃以上の測点に対応するクラムを検出する
ことを特徴とする請求項3記載の検査方法。 The inspection method according to claim 3, wherein a crumb corresponding to a measurement point having a temperature difference from the average temperature of 9.5 ° C or more is detected. - 前記脱水乾燥したクラム状のポリマーが供給されるときのポリマーの平均温度は40~70℃である
ことを特徴とする請求項1~4いずれか記載の検査方法。 The inspection method according to any one of claims 1 to 4, wherein an average temperature of the dehydrated and dried crumb-shaped polymer is 40 to 70 ° C. - 前記過剰水分を含むクラムは塊状である
ことを特徴とする請求項1~5いずれか記載の検査方法。 The inspection method according to any one of claims 1 to 5, wherein the crumb containing excess moisture is a lump. - 過剰水分を含むクラムは、含水率が1質量%以上である
ことを特徴とする請求項1~6いずれか記載の検査方法。 The inspection method according to any one of claims 1 to 6, wherein the crumb containing excess moisture has a moisture content of 1% by mass or more. - 重合し脱水乾燥したクラム状のポリマーを連続的に供給する供給手段と、
前記供給手段より供給されたクラム状のポリマーの温度を測定する温度測定手段と、
前記温度測定手段を用いて平均温度との温度差を算出し、温度差に基づいて過剰水分を含むクラムを検出する判断手段と、
を備えることを特徴とする検査装置。 Supply means for continuously supplying a polymerized and dehydrated and dried crumb-like polymer,
Temperature measuring means for measuring the temperature of the crumb-like polymer supplied from the supplying means,
Calculating the temperature difference from the average temperature using the temperature measuring means, determining means for detecting a crumb containing excess moisture based on the temperature difference,
An inspection apparatus comprising: - 前記温度測定手段はサーモグラフカメラである
ことを特徴とする請求項8記載の検査装置。 The inspection device according to claim 8, wherein the temperature measuring means is a thermographic camera.
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