Lalacewar tabo a cikin bututu mai zafi mai ci gaba da birgima yana wanzuwa a saman bututun ƙarfe na ciki, wanda yayi kama da ramin girman hatsin waken soya.Yawancin tabo suna da launin toka-launin ruwan kasa ko launin toka-baki-baki.Abubuwan da ke tasiri na tabo na ciki sun haɗa da: deoxidizer, tsarin allura, man shafawa na mandrel da sauran abubuwa.Bari mu bi masu kera bututun ƙarfe na carbon don ganin yadda ake sarrafa lahani na ciki na bututun ƙarfe maras sumul:

1. Deoxidizer

Ana buƙatar oxide ya kasance a cikin narkakkar yanayi lokacin da aka riga aka huda mandrel.Ƙarfinsa da sauran ƙaƙƙarfan buƙatu.

1) Girman barbashi na deoxidizer foda ana buƙatar gabaɗaya don zama kusa da raga 16.
2) Abubuwan da ke cikin sodium stearate a cikin wakili na scavenging ya kamata ya kai fiye da 12%, don haka zai iya ƙonewa a cikin lumen capillary.
3) Ƙayyade adadin allura na deoxidizer bisa ga yanayin ciki na capillary, gabaɗaya 1.5-2.0g/dm2, kuma adadin deoxidizer da aka fesa ta capillary tare da diamita daban-daban da tsayi daban-daban.

2. sigogin tsarin allura

1) Dole ne a daidaita matsa lamba na allura tare da diamita da tsayin capillary, wanda ba wai kawai yana tabbatar da busawa mai ƙarfi da isashen konewa ba, amma kuma yana hana ɓarnar da ba ta cika konewa daga busa ta hanyar iska ba.
2) Ya kamata a daidaita lokacin tsarkakewa na masana'antar bututun ƙarfe mara nauyi daidai da kai tsaye da tsayin capillary, kuma ma'auni shine cewa babu wani abin da aka dakatar da ƙarfe a cikin capillary kafin a busa shi.
3) Ya kamata a daidaita tsayin bututun ƙarfe bisa ga diamita na capillary don tabbatar da kyakkyawan tsakiya.Ya kamata a tsaftace bututun ƙarfe sau ɗaya kowane motsi, kuma a cire bututun don tsaftacewa bayan dogon rufewa.Domin tabbatar da cewa an busa wakili a ko'ina a bangon ciki na capillary, ana amfani da na'urar zaɓin zaɓi a tashar don busa wakili na deoxidizing, kuma an sanye shi da motsin iska mai juyawa.

3. Mandrel lubrication

Idan tasirin man shafawa na mandrel bai yi kyau ba ko kuma zafin jiki na man shafawa ya yi ƙasa da ƙasa, tabo na ciki zai faru.Domin ƙara yawan zafin jiki na mandrel, hanyar sanyaya ruwa ɗaya kawai za'a iya ɗauka.A lokacin aikin samarwa, ya zama dole a kula sosai da zafin jiki na mandrel don tabbatar da cewa yanayin zafin jiki na mandrel ɗin ya kasance 80-120 ° C kafin a fesa mai mai, kuma zafin jiki bai kamata ya wuce 120 ° C ba. na dogon lokaci, don tabbatar da cewa mai mai a saman ya bushe kuma yana da yawa kafin a fara huda , Mai aiki ya kamata ya duba yanayin yanayin man fetur.