WO2023218792A1 - 脱脂装置 - Google Patents

脱脂装置 Download PDF

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Publication number
WO2023218792A1
WO2023218792A1 PCT/JP2023/013496 JP2023013496W WO2023218792A1 WO 2023218792 A1 WO2023218792 A1 WO 2023218792A1 JP 2023013496 W JP2023013496 W JP 2023013496W WO 2023218792 A1 WO2023218792 A1 WO 2023218792A1
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WO
WIPO (PCT)
Prior art keywords
amount
degreasing
gas
generated
gas generated
Prior art date
Application number
PCT/JP2023/013496
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
優 田中
Original Assignee
株式会社島津製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社島津製作所 filed Critical 株式会社島津製作所
Priority to CN202380020331.9A priority Critical patent/CN118647590A/zh
Priority to JP2024520290A priority patent/JPWO2023218792A1/ja
Publication of WO2023218792A1 publication Critical patent/WO2023218792A1/ja

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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/638—Removal thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B5/18—Arrangement of controlling, monitoring, alarm or like devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices

Definitions

  • the present invention relates to a degreasing device that performs degreasing treatment on objects to be treated such as ceramic materials.
  • Patent Document 1 This type of conventional degreasing device as shown in Patent Document 1 requires regular maintenance.
  • a heating furnace that stores and degreases objects to be processed is provided with an opening for taking the objects in and out, and this opening is hermetically sealed with a lid during degreasing; The provided seal member is replaced during regular maintenance.
  • inspections and repairs are also performed when some abnormality occurs in the equipment, such as a malfunction in the processing process, and various parts, including the sealing members mentioned above, are replaced and adjusted at that time. .
  • the present invention has been developed to enable maintenance to be carried out at an appropriate time in this type of heating device for degreasing, thereby preventing abnormalities from occurring in the device and ensuring the maximum operating time of the device. , even if an unexpected abnormality occurs, the purpose is to be able to identify the cause with more precision.
  • the degreasing apparatus includes a heating furnace for storing and degreasing an object to be treated, and an amount of generated gas generated during the degreasing treatment or a value indirectly indicating this (hereinafter referred to as the amount of generated gas). ), and an information processing device that calculates management information, which is information related to management including inspection and maintenance timing, based on the amount of gas generated measured by the measuring device. That is.
  • inspection and maintenance can be performed at appropriate times based on the amount of gas generated, thereby preventing abnormalities in the equipment and ensuring maximum equipment operating time. Even if an unexpected abnormality occurs, the cause can be identified with greater accuracy.
  • 1 is an overall schematic diagram of a degreasing device in one embodiment of the present invention. It is a graph showing the time course of the absorbance spectrum. 2 is a graph showing a change over time in the waveform area of a CH group shown in an absorbance spectrum. It is a graph showing a calibration curve between the amount of generated gas and the integrated value. It is a flowchart which shows the operation of the amount calculation part of generated gas in the same embodiment. It is a flowchart which shows the operation of the management information calculation part in the same embodiment.
  • this degreasing apparatus 100 includes a heating furnace 1 that accommodates a processing target W such as a ceramic molded body and performs a degreasing process, and a heating furnace 1 for degreasing the processing target W in the heating furnace 1. It is equipped with a measuring device 2 that in-line measures the weight of gas generated by decomposition and vaporization of the organic binder contained therein, or a value indirectly indicating this (hereinafter also referred to as the amount of generated gas).
  • the heating furnace 1 includes, for example, a metal furnace body 11 provided with an opening for taking in and taking out the object W to be treated, and a metal door 12 that closes the opening.
  • a metal furnace body 11 provided with an opening for taking in and taking out the object W to be treated
  • a metal door 12 that closes the opening.
  • this heating furnace 1 is connected to a gas inlet pipe 3 for supplying the degreasing gas and a gas exhaust pipe 4 for discharging the generated gas, as well as controlling the inside of the heating furnace 1 using temperature control means such as a thermocouple.
  • a heater 5 for maintaining a predetermined degreasing temperature, a fan 6 for circulating degreasing gas within the heating furnace 1, and the like are provided.
  • a control device (not shown) is further provided for automatically performing a predetermined degreasing sequence by controlling the valve (not shown) provided in the gas introduction pipe 3, etc., the fan 6, the heater 5, etc.
  • the measuring device 2 includes a gas detection device 21 that detects the generated gas, and a gas amount calculation section 22 that calculates the amount of generated gas based on the detection data output from the gas detection device 21. be.
  • the gas detection device 21 detects a predetermined component (for example, a gas having a C--H group) of the generated gas, and here, it is an FTIR (Fourier transform infrared spectrometer), which is one of the absorbance meters. is used.
  • This gas detection device 21 is installed near the exhaust port of the heating furnace 1, but the installation location may be any position where generated gas is detected, such as any location within the heating furnace 1 or a gas exhaust pipe. It doesn't matter if it's within 4.
  • the gas detection device 21 is not limited to FTIR, and includes, for example, an NDIR (non-dispersive infrared absorption method) type gas sensor, GC (gas chromatograph), FID (flame ionization detector), TOC meter (total organic carbon meter). etc. may also be used.
  • NDIR non-dispersive infrared absorption method
  • GC gas chromatograph
  • FID flame ionization detector
  • TOC meter total organic carbon meter
  • This information processing device 7 is a so-called computer equipped with a CPU, a memory, an I/O interface, a communication interface, etc.
  • the information processing device 7 is a computer equipped with a CPU, a memory, an I/O interface, a communication interface, etc. It functions as the gas amount calculation section 22.
  • this information processing device 7 does not need to be physically integrated, and may be composed of a plurality of computers that are communicably connected to each other, and for example, the control device may control all or all of this information processing device 7. It may be configured to take on some functions.
  • the information processing device 7 also functions as a management information calculation unit 71 that calculates management information that is information related to management including inspection and maintenance timing.
  • the gas amount calculation unit 22 acquires the detection data output from the gas detection device 21 at each sampling time (step S12) (step S13), By applying background correction and the like, an absorbance spectrum as shown in FIG. 2 is calculated (step S14).
  • FIG. 2 is an example of the absorbance spectra of the generated gas at the first time, second time, and third time during the degreasing process.
  • the waveform area of the C-H group in this absorbance spectrum has a constant relationship (proportional relationship) with the amount of gas generated at that sampling time, and the value obtained by integrating this waveform area over time over the degreasing treatment period.
  • the integrated value of the waveform area at each sampling time has a certain relationship (proportional relationship) with the amount of gas generated during the degreasing process, and becomes a value that indirectly indicates the amount of gas generated during the degreasing process.
  • the gas amount calculation unit 22 calculates the area of the waveform caused by the CH group (the area of the shaded portion shown in FIG. 2) in the absorbance spectrum at each sampling time (step S15).
  • the gas amount calculation unit 22 calculates an integrated value (hereinafter also referred to as an actual measured integrated value) of the waveform area at each sampling time during the degreasing process (step S17). Note that the waveform area and integrated value calculated in each degreasing process are recorded in a predetermined area of the memory as log data.
  • FIG. 3 is a graph showing an example of a change in the waveform area of a CH group when the horizontal axis represents elapsed time, and represents a change in the amount of gas generated over time. From this graph, it can be seen that after a certain amount of time has passed since the start of the degreasing process, the amount of gas generated begins to gradually increase, passes a peak, and finally reaches 0, indicating the completion of degreasing. The area of the peak waveform in this graph (indicated by diagonal lines) becomes the integrated value.
  • a calibration curve showing the relationship between the integrated value and the amount of gas generated is determined in advance through experiments or the like.
  • calibration curve data indicating this calibration curve is stored in a calibration curve data storage section 72 set in a predetermined area of the memory in the form of a calculation formula, a table, or the like.
  • the amount of gas generated by normal degreasing treatment is determined for each type of object W to be treated, and can be determined from experiments, past degreasing treatment data, etc.
  • the expected amount of generated gas for each type of object W to be processed (hereinafter also referred to as expected amount of generated gas) is stored in advance in the expected amount of generated gas storage section 73 set in a predetermined area of the memory. I have let you.
  • the management information calculation unit 71 recognizes the type of the object W to be degreased based on the operator's input, and refers to the estimated gas amount storage unit 73 to calculate the estimated gas generation of the object W to be degreased.
  • the amount is acquired (step S21).
  • the management information calculation unit 72 refers to the calibration curve data and calculates an estimated integrated value that is an integrated value corresponding to the estimated amount of generated gas (step S22).
  • the management information calculation unit 71 calculates a difference by subtracting the assumed integrated value from the actual measured integrated value (step S23), and when the difference value exceeds a predetermined threshold (step S24), the management information Information indicating that the inspection/maintenance period, which is one of the following, has been reached is output (step S25). This information is output and displayed on the display of the information processing device 7 or a mobile terminal connected to the information processing device 7 by wire or wirelessly.
  • the reason why the measured integrated value exceeds the expected integrated value can be the start of deterioration of door seals, fan shaft seals, etc.
  • the amount of air mixed in from the outside increases, which accelerates the decomposition of the generated gas, even though it does not lead to abnormalities in the degreasing process or equipment failure. This is because the amount) increases.
  • a similar situation may occur depending on the storage condition of the object to be processed.
  • the operator Upon receiving the management information, the operator temporarily stops the operation of the degreasing device 100 and performs inspection and maintenance such as leak testing and seal replacement.
  • seal deterioration etc. can be detected quickly, so inspection and maintenance can be carried out at the exact timing when inspection and maintenance need to be performed. Therefore, while preventing abnormalities from occurring in the degreasing apparatus 100, wasteful inspection and maintenance can be made unnecessary, and the maximum operating time of the apparatus can be ensured.
  • the log data and the difference between the integrated value and the expected integrated value are recorded in memory and can be referenced, so the cause can be identified more accurately.
  • the log data and the difference value can be said to be feedback information for quality control of the processing object W, which is one type of management information.
  • the inspection/maintenance period is defined as the point in time when the difference value obtained by subtracting the estimated integrated value from the actual measured integrated value exceeds a predetermined threshold value. Then, based on the speed at which the amount of change increases, a time in the future when the difference value will exceed a predetermined threshold may be predicted, and the predicted time may be output in advance as the inspection/maintenance time.
  • the necessity of inspection and maintenance was determined by comparing the measured integrated value and the assumed integrated value, but by converting using the calibration curve data, the amount of gas generated and the estimated gas generated It may be determined by comparing with the quantity.
  • the amount of generated gas was measured based on its absorbance spectrum, focusing on the C--H group contained in the generated gas, but other functional groups or components may be used.
  • FTIR is used as the gas detection device, and it is possible to measure and analyze various components of the generated gas, so more information can be obtained and used for inspection and maintenance, quality control, and abnormality identification. It can greatly contribute to such things.
  • a heating furnace that accommodates and degreases the object to be treated, and in-line measurement of the amount of gas generated during the degreasing process or a value that indirectly indicates this (hereinafter referred to as the amount of gas generated).
  • a degreasing device comprising: a degreasing device; and an information processing device that calculates management information that is management information including inspection and maintenance timing based on the amount of gas generated measured by the measuring device.
  • the information processing device calculates the management information based on the difference between the amount of gas generated measured by the measuring device and the amount of gas generated that is assumed to be generated from the object to be treated.
  • the measuring device includes a gas detection device that detects the generated gas, and a gas amount calculation unit that calculates the amount of generated gas based on the detection data of the gas detection device [1], [ 2] or the degreasing device according to [3]. With such a device, the amount of gas generated can be measured in-line in real time.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
PCT/JP2023/013496 2022-05-13 2023-03-31 脱脂装置 WO2023218792A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202380020331.9A CN118647590A (zh) 2022-05-13 2023-03-31 脱脂装置
JP2024520290A JPWO2023218792A1 (enrdf_load_stackoverflow) 2022-05-13 2023-03-31

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JP2022079313 2022-05-13
JP2022-079313 2022-05-13

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62180038U (enrdf_load_stackoverflow) * 1986-05-06 1987-11-16
JP2004218005A (ja) * 2003-01-15 2004-08-05 Osaka Yakin Kogyo Kk 粉末成形体の脱脂焼結システム及び脱脂焼結方法
US20200393126A1 (en) * 2019-06-12 2020-12-17 Markforged, Inc. Catalytic thermal debind furnaces with feedback control
JP2021139599A (ja) * 2020-03-09 2021-09-16 イビデン株式会社 連続焼成炉及び連続焼成方法
JP2022056011A (ja) * 2020-09-29 2022-04-08 株式会社島津製作所 脱脂炉および脱脂方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2550805B2 (ja) * 1991-06-30 1996-11-06 株式会社島津製作所 クロマトグラフの吸光分析装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62180038U (enrdf_load_stackoverflow) * 1986-05-06 1987-11-16
JP2004218005A (ja) * 2003-01-15 2004-08-05 Osaka Yakin Kogyo Kk 粉末成形体の脱脂焼結システム及び脱脂焼結方法
US20200393126A1 (en) * 2019-06-12 2020-12-17 Markforged, Inc. Catalytic thermal debind furnaces with feedback control
JP2021139599A (ja) * 2020-03-09 2021-09-16 イビデン株式会社 連続焼成炉及び連続焼成方法
JP2022056011A (ja) * 2020-09-29 2022-04-08 株式会社島津製作所 脱脂炉および脱脂方法

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CN118647590A (zh) 2024-09-13
JPWO2023218792A1 (enrdf_load_stackoverflow) 2023-11-16

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