JPS622044B2 - - Google Patents
Info
- Publication number
- JPS622044B2 JPS622044B2 JP14124083A JP14124083A JPS622044B2 JP S622044 B2 JPS622044 B2 JP S622044B2 JP 14124083 A JP14124083 A JP 14124083A JP 14124083 A JP14124083 A JP 14124083A JP S622044 B2 JPS622044 B2 JP S622044B2
- Authority
- JP
- Japan
- Prior art keywords
- sintered metal
- cleaning
- filter
- metal filter
- spinning
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
- 239000002184 metal Substances 0.000 claims description 31
- 238000001816 cooling Methods 0.000 claims description 22
- 238000004140 cleaning Methods 0.000 claims description 20
- 239000012670 alkaline solution Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 239000002253 acid Substances 0.000 claims description 8
- 238000002074 melt spinning Methods 0.000 claims description 8
- 229920000728 polyester Polymers 0.000 claims description 7
- 239000000243 solution Substances 0.000 claims description 4
- 230000001172 regenerating effect Effects 0.000 claims description 3
- 238000010793 Steam injection (oil industry) Methods 0.000 claims 1
- 238000009987 spinning Methods 0.000 description 14
- 238000005554 pickling Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 238000011282 treatment Methods 0.000 description 8
- 230000004927 fusion Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000004745 nonwoven fabric Substances 0.000 description 3
- 238000013020 steam cleaning Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000004506 ultrasonic cleaning Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- -1 Polyethylene terephthalate Polymers 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000011260 aqueous acid Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000007380 fibre production Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 235000011118 potassium hydroxide Nutrition 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
Landscapes
- Detergent Compositions (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Description
本発明は整流用焼結金属フイルターの洗浄方法
に関するものである。
繊維製造工程において繊維を加熱したり、ある
いは冷却するのに、熱風または冷却風を用いるケ
ースが多い。
たとえば、合成繊維の溶融紡糸においてはノズ
ルから紡出された糸条を冷却風（いわゆるクエン
チングエアー）の出る冷却筒を通して冷却させる
が、この際の冷却風は糸ゆれが少なく、かつ適正
な冷却が行なえるよう、冷却筒の円周方向に均一
な風速分布をもち、しかも経時的に変動しないよ
う整流せしめることが肝要である。このため、か
かる冷却筒には、通常冷却風の整流用として金
網、不繊布、多孔筒あるいは焼結金属フイルター
などが組み込まれ、特に近時では整流効果および
耐久性などが優れているところから焼結金属フイ
ルターが多用されるようになつた。しかるに、前
記焼結金属フイルターはそれ自身が特異な多孔質
構造であるため、優れた整流作用をもつている反
面、冷却風中の不純物、たとえば紡糸時に放出さ
れるオリゴマー、油剤飛沫、あるいは塵埃などを
吸着して目塞りを起し易く、このため該焼結金属
フイルターは定期的ないし整流効果に異常が認め
られた時点で、適宜洗浄し、目塞り物を除去する
必要があつた。
さて、焼結金属フイルターの洗浄方法にはソル
ト分解法、酸洗い、フイルター内側より圧空また
は圧水を通す方法、超音波洗浄法、あるいはこれ
らの組合せ等が一般的な方法として考えられる
が、たとえば、ソルト分解によればオリゴマーの
ような可燃物はソルト浴中で燃えつきれば問題な
いが、往々にして炭化物の状態でフイルター中に
残留し、一方酸洗いは、もともとオリゴマーのよ
うな有機質の洗浄除去には不適当である。また一
方の圧空または圧水を用いる方法、あるいは超音
波洗浄などによると、ある程度の洗浄効果が得ら
れるが、何しろ焼結金属フイルターは特異な多孔
質構造であるため前述の物理的手段によつては満
足しうる洗浄効果が得られなかつた。このように
焼結金属フイルターを熱風あるいは冷却風の整流
手段に適用するには、その洗浄・再生を如何に効
果的に行なうかが重要な技術的課題とされてい
た。
本発明は上述のとおり熱風あるいは冷却風の整
流手段に適用する焼結金属フイルターについて、
効果的な洗浄・再生手段を提供し、これによつて
繊維製造時、特に紡糸時における紡出糸条の冷却
を適正に行ない、糸条相互の融着防止やデニール
斑の減少を図つたものであつて、本発明の構成は
次のとおりである。
ポリエステル用溶融紡糸装置の冷却筒に設けら
れた整流用焼結金属フイルターを洗浄・再生する
に際し、該焼結金属フイルターをアルカリ溶液お
よび酸溶液の順に浸漬し、しかる後スチーム噴射
を行なうことを特徴とする整流用焼結金属フイル
ターの洗浄方法。
以下、本発明の構成を詳細に説明すると、本発
明は焼結金属フイルターの洗浄方法として、アル
カリ溶液処理、酸溶液での中和（以下、酸洗いと
いう）およびスチーム洗浄からなる一連の洗浄工
程により、該フイルター中の目塞り物を洗浄除去
しようとするものである。
すなわち、たとえば、ポリエステルの溶融紡糸
では、通常紡糸口金から吐出される糸条を冷却さ
せるための冷却筒に、冷却風の整流用として焼結
金属フイルターが装備されており、この焼結金属
フイルターを洗浄するには、まず、フイルターを
アルカリ溶液に浸漬処理することが重要である。
何となれば前述の焼結金属フイルターではポリエ
ステルオリゴマーやポリエステル系塵埃が目塞り
物の主体であり、このため目塞り物を予めアルカ
リ溶液処理により溶解もしくはフイルター中の細
孔から離脱し易い状態としておくことが、以後の
酸洗いおよびスチーム洗浄の処理効果と相埃つ
て、顕著な洗浄効果が得られるからである。
ここでのアルカリ溶液としては、カセイソー
ダ、カセイカリ等が、0.01〜5N、好ましくは0.05
〜0.5Nのアルカリ濃度範囲で用いられる。この
とき、アルカリ濃度が0.1N未満では目塞り物の
溶解性が小さく、5Nを超えると、回を重ねる洗
浄処理によつて焼結金属フイルターの基質（通常
は青銅）が侵されるようになる。
また該アルカリ溶液に焼結金属フイルターを浸
漬するには静置または撹拌下で0.5〜５時間程度
行なうのがよく、またその際の液温は室温から80
℃の範囲で適宜選択すればよい。
次に焼結金属フイルターはアルカリ溶液処理が
終ると酸洗いに移行するが、ここで用いる酸とし
ては硫酸、塩酸、燐酸、硝酸、シユウ酸等があ
る。この酸洗いでは該フイルターを静置または撹
拌状態のもと酸水溶液に浸漬することによつて前
記アルカリ溶液処理の際に付着したアルカリ分を
中和させると同時に、目塞り物中の酸可溶成分を
溶解させるための工程であるから、酸濃度として
0.01〜5N、好ましくは0.05〜0.5N、浸漬時間とし
て１〜120秒、好ましくは１〜60秒が望ましい。
このとき酸濃度および浸漬時間が0.01N、１秒未
満ではアルカリ分の中和効果および目塞り物の酸
可溶成分の溶解除去効果が小さく、5N、120秒を
超えるとアルカリ溶液処理の場合と同様、焼結金
属フイルターの基質自体を侵すようになる。
なお、酸洗い前の焼結金属フイルターは必要に
応じて水洗すればよいが、酸洗い後の該フイルタ
ーはなるべく水洗を行ない、酸を除去することが
望ましい。
酸洗いが終ると、焼結金属フイルターは通常の
場合、その内側から0.5〜10Kg／cm2のスチームを
全面に亘つて、ていねいにブローする、いわゆる
スチーム洗浄を行ない、これによつてフイルター
中の目塞り成分は殆んど完全に離脱できる。その
後は必要に応じて圧空（通常は0.5〜６Kg／cm2）
をブローし、該フイルター中の水分を除去・乾燥
させる場合もある。
以上述べたように、本発明は整流用焼結金属フ
イルター中の目塞り物を、アルカリ溶液処理、酸
洗い、およびスチーム洗浄からなる一連の洗浄工
程により洗浄・再生しようとするものであつて、
これによりフイルター中の目塞り物はほぼ完全に
除去できるため、たとえばポリエステルの溶融紡
糸における冷却筒の整流用焼結金属フイルターに
適用すると、フイルターの整流機能が常に適正に
保たれ、紡糸口金から吐出される紡出糸条は均一
に冷却され、また糸ゆれが少ない。この結果は糸
条相互の融着やデニール斑が大巾に減少し、加え
て糸条の延伸性が向上するというすぐれた効果を
奏するのである。
以下実施例を挙げて本発明を具体的に説明す
る。
実施例 １〜４
ポリエチレンテレフタレートを通常の溶融紡糸
装置（口金；口径250mmφ、孔数2800個）により
吐出量1800ｇ／分、引取速度1350ｍ／分で紡糸
し、この糸条を3.7倍に延伸して1.5デニールの延
伸糸とした。この溶融紡糸装置に用いてある冷却
筒は第１図に示す如き円筒型の冷却筒で、円周方
向に均一な風速分布をもたせるため、外周側より
順次不織布５、焼結金属フイルター６（70μカツ
ト）、金網（50メツシユ）７、夫々新品のものが
取付けてある。
紡糸期間中、紡糸日数と紡出糸条の糸ゆれ、融
着、繊度変動率、延伸工程でのローラ巻付き、お
よびＵ／Ｙの関係を調査し第１表に示した。ここ
での融着は走行糸条に針金を挿入し、融着により
針金が動いた回数でもつてあらわした。また繊度
変動率はデニロスコープで測定した値である。
The present invention relates to a method for cleaning a sintered metal filter for rectification. Hot air or cooling air is often used to heat or cool fibers in the fiber manufacturing process. For example, in melt-spinning synthetic fibers, the yarn spun from a nozzle is cooled through a cooling tube that emits cooling air (so-called quenching air). In order to achieve this, it is important to have a uniform wind speed distribution in the circumferential direction of the cooling cylinder and to rectify the flow so that it does not fluctuate over time. For this reason, such cooling cylinders usually incorporate wire mesh, nonwoven fabric, perforated cylinders, or sintered metal filters to rectify the cooling air. Concentrated metal filters have come into widespread use. However, since the sintered metal filter itself has a unique porous structure, although it has an excellent rectifying effect, it is susceptible to impurities in the cooling air, such as oligomers released during spinning, oil droplets, and dust. Therefore, the sintered metal filter needs to be cleaned periodically or whenever an abnormality is observed in the rectifying effect to remove the clogging material. Common methods for cleaning sintered metal filters include salt decomposition, pickling, passing compressed air or water from inside the filter, ultrasonic cleaning, or a combination of these methods. According to salt decomposition, there is no problem with combustible substances such as oligomers if they are burned up in the salt bath, but they often remain in the filter in the form of char.On the other hand, pickling originally cleans organic substances such as oligomers. Not suitable for removal. On the other hand, a method using compressed air or water, or ultrasonic cleaning can provide a certain degree of cleaning effect, but since the sintered metal filter has a unique porous structure, it is impossible to use the above-mentioned physical means. However, a satisfactory cleaning effect could not be obtained. In order to apply a sintered metal filter to a hot air or cooling air rectifying means, an important technical issue is how to effectively clean and regenerate the filter. As mentioned above, the present invention relates to a sintered metal filter applied to a hot air or cooling air rectifying means.
Provides an effective cleaning and regenerating means to properly cool spun yarn during fiber production, especially during spinning, to prevent yarns from fusing together and to reduce denier unevenness. The configuration of the present invention is as follows. When cleaning and regenerating a sintered metal filter for rectification installed in a cooling tube of a melt spinning device for polyester, the sintered metal filter is immersed in an alkaline solution and an acid solution in that order, and then steam is injected. A method for cleaning sintered metal filters for rectification. Hereinafter, the structure of the present invention will be described in detail. The present invention is a method for cleaning a sintered metal filter, and includes a series of cleaning steps consisting of alkaline solution treatment, neutralization with an acid solution (hereinafter referred to as pickling), and steam cleaning. This is intended to clean and remove the clogging material in the filter. For example, in polyester melt spinning, a cooling tube for cooling the yarn discharged from a spinneret is usually equipped with a sintered metal filter to rectify the cooling air. To clean, it is important to first immerse the filter in an alkaline solution.
The reason for this is that in the aforementioned sintered metal filter, the main clogging materials are polyester oligomers and polyester-based dust, so the clogging materials are easily dissolved or removed from the pores in the filter by treatment with an alkaline solution in advance. This is because a remarkable cleaning effect can be obtained by keeping the dust clean in combination with the treatment effects of the subsequent pickling and steam cleaning. As the alkaline solution here, caustic soda, caustic potash, etc. are 0.01 to 5N, preferably 0.05N.
Used in the alkaline concentration range of ~0.5N. At this time, if the alkali concentration is less than 0.1N, the solubility of the clogging material is low, and if it exceeds 5N, the substrate of the sintered metal filter (usually bronze) will be attacked by repeated cleaning treatments. . In addition, it is best to immerse the sintered metal filter in the alkaline solution for about 0.5 to 5 hours while standing still or stirring.
It may be appropriately selected within the range of °C. Next, after the alkaline solution treatment, the sintered metal filter is subjected to pickling, and the acids used here include sulfuric acid, hydrochloric acid, phosphoric acid, nitric acid, and oxalic acid. In this pickling, the filter is left standing or immersed in an aqueous acid solution while being stirred, thereby neutralizing the alkaline components that adhered during the alkaline solution treatment, and at the same time removing the acid in the clogging material. Since this is a process for dissolving solvent components, the acid concentration
0.01 to 5N, preferably 0.05 to 0.5N, and immersion time of 1 to 120 seconds, preferably 1 to 60 seconds.
At this time, if the acid concentration and immersion time is less than 0.01N and 1 second, the effect of neutralizing alkaline content and dissolving and removing the acid-soluble components of the blockage will be small, and if it exceeds 5N and 120 seconds, alkaline solution treatment Similarly, it begins to attack the substrate itself of the sintered metal filter. The sintered metal filter before pickling may be washed with water if necessary, but it is desirable to wash the filter with water after pickling to remove the acid. After pickling, the sintered metal filter is usually steam cleaned by carefully blowing 0.5 to 10 kg/cm 2 of steam from inside the filter over the entire surface. The clogging components can be almost completely removed. After that, use compressed air as necessary (usually 0.5-6Kg/cm 2 )
In some cases, the water in the filter is removed and dried by blowing. As described above, the present invention attempts to clean and regenerate clogging substances in a sintered metal filter for rectification through a series of cleaning steps consisting of alkaline solution treatment, pickling, and steam cleaning. ,
This makes it possible to almost completely eliminate clogging in the filter, so when applied to a sintered metal filter for rectifying cooling cylinders in polyester melt spinning, for example, the rectifying function of the filter is always maintained at an appropriate level, allowing the flow of air from the spinneret. The spun yarn that is discharged is cooled uniformly and has little yarn wobbling. As a result, the fusion between yarns and denier unevenness are greatly reduced, and in addition, the drawability of the yarn is improved, which is an excellent effect. The present invention will be specifically explained below with reference to Examples. Examples 1 to 4 Polyethylene terephthalate was spun using a normal melt spinning device (mouth: diameter 250 mm, number of holes 2800) at a discharge rate of 1800 g/min and a take-up speed of 1350 m/min, and the yarn was drawn 3.7 times. It was made into a drawn yarn of 1.5 denier. The cooling cylinder used in this melt spinning apparatus is a cylindrical cooling cylinder as shown in Fig. 1, and in order to have a uniform wind velocity distribution in the circumferential direction, a nonwoven fabric 5 and a sintered metal filter 6 (70μ New wire mesh (cut) and wire mesh (50 mesh) 7 have been installed. During the spinning period, the relationship between the number of spinning days, yarn wobbling, fusion, fineness fluctuation rate, roller winding in the drawing process, and U/Y of the spun yarn was investigated and shown in Table 1. The fusion here was also expressed by the number of times the wire was inserted into the running yarn and the wire moved due to fusion. Further, the fineness variation rate is a value measured with a deniroscope.
【表】
紡糸開始から60日後に冷却筒から焼結金属フイ
ルターを取りはずし、このフイルターを本発明に
係る洗浄方法で洗浄したのち、もとの冷却筒に取
り付け、引きつづき紡糸試験を行なつた。この場
合の焼結金属フイルターの洗浄条件およびフイル
ター洗浄後の紡糸における紡糸・延伸性を第２表
に示した。[Table] After 60 days from the start of spinning, the sintered metal filter was removed from the cooling cylinder, and after cleaning this filter using the cleaning method according to the present invention, it was attached to the original cooling cylinder and the spinning test was continued. Table 2 shows the cleaning conditions for the sintered metal filter in this case and the spinning and drawing properties during spinning after cleaning the filter.
【表】
この結果が示すようにポリエステルの溶融紡糸
で用いられた整流用焼結金属フイルター中の目塞
り物は、本発明の洗浄方法を適用したことにより
ほぼ完全に除去され、フイルターの整流効果は使
用開始時（新品）と同程度に回復し得た。従つ
て、フイルターの洗浄再生時期を適切に選定すれ
ば、紡糸時の糸ゆれ、融着、延伸時の延伸ローラ
巻付、Ｕ／Ｙを大巾に向上しうることがわかる。
比較例 １
実施例１〜４の60日紡糸後のフイルターをソル
ト分解後0.1N硫酸水溶液で酸洗いし、2.0Kg／cm2
のスチームでスチームブローし、洗浄した。該フ
イルターを冷却筒に組み込み、実施例１〜４と同
じく紡糸を行つたが、糸われが大であり融着2.4
回／分、繊度変動率8.2％、延伸ローラ巻付き
0.46回／ｔおよびＵ／Ｙも13／106本であり、満
足すべき紡糸状態のものが得られなかつた。[Table] As shown by this result, by applying the cleaning method of the present invention, the clogging in the sintered metal filter for rectification used in polyester melt spinning was almost completely removed. The effect was recovered to the same level as when it was first used (new). Therefore, it can be seen that if the filter cleaning and regeneration timing is appropriately selected, yarn fluctuation during spinning, fusion, stretching roller wrapping during stretching, and U/Y can be greatly improved. Comparative Example 1 The filters of Examples 1 to 4 after spinning for 60 days were decomposed with salt and then pickled with a 0.1N sulfuric acid aqueous solution to yield 2.0Kg/cm 2
It was steam-blown and washed with steam. The filter was assembled into a cooling cylinder and spinning was carried out in the same manner as in Examples 1 to 4, but the threads were large and the fusion was 2.4.
times/min, fineness fluctuation rate 8.2%, with stretching roller winding
The spinning speed was 0.46 times/t and the U/Y was also 13/10 6 , and a satisfactory spinning state could not be obtained.
第１図は本発明の実施例に用いた紡糸装置の冷
却筒を示す概略図縦断面図である。
１：口金、２：口金ホルダー、３：スピンブロ
ツクの一部、４：冷却筒、５：不織布、６：焼結
金属フイルター、７：金網。
FIG. 1 is a schematic vertical sectional view showing a cooling cylinder of a spinning device used in an example of the present invention. 1: cap, 2: cap holder, 3: part of spin block, 4: cooling cylinder, 5: nonwoven fabric, 6: sintered metal filter, 7: wire mesh.
Claims (1)
られた整流用焼結金属フイルターを洗浄・再生す
るに際し、該焼結金属フイルターをアルカリ溶液
および酸溶液の順に浸漬し、しかる後スチーム噴
射を行なうことを特徴とする整流用焼結金属フイ
ルターの洗浄方法。1. When cleaning and regenerating the rectifying sintered metal filter installed in the cooling cylinder of a polyester melt spinning device, the sintered metal filter is immersed in an alkaline solution and an acid solution in that order, and then steam injection is performed. A method for cleaning sintered metal filters for rectification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14124083A JPS6034612A (en) | 1983-08-03 | 1983-08-03 | Cleaning of sintered metallic filter for flow straightening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14124083A JPS6034612A (en) | 1983-08-03 | 1983-08-03 | Cleaning of sintered metallic filter for flow straightening |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6034612A JPS6034612A (en) | 1985-02-22 |
| JPS622044B2 true JPS622044B2 (en) | 1987-01-17 |
Family
ID=15287353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14124083A Granted JPS6034612A (en) | 1983-08-03 | 1983-08-03 | Cleaning of sintered metallic filter for flow straightening |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6034612A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06170641A (en) * | 1992-12-09 | 1994-06-21 | Nippon Steel Corp | Burr removing device for shape steel |
| CN118292122B (en) * | 2024-04-30 | 2026-01-06 | 新乡化纤股份有限公司 | An automatic cleaning device and method for horizontal spinning tubes of viscose filament |
-
1983
- 1983-08-03 JP JP14124083A patent/JPS6034612A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6034612A (en) | 1985-02-22 |
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