Ụlọ Shell maka nkedo itinye ego

Nkedo itinye ego bụ ịkwanye ọtụtụ akwa mkpuchi mkpuchi n'elu ihe ọkpụkpụ wax. Mgbe ọ gbasiri ike ma kpọọ nkụ, a na-agbaze ihe ọkpụkpụ ahụ site na ikpo ọkụ iji nweta shea nwere oghere kwekọrọ na ọdịdị nke wax. Mgbe emechara, a na-awụsa ya n'ime usoro nke inweta nkedo, ya mere a na-akpọkwa ya nkedo wax furu efu. Site na nkwalite teknụzụ mmepụta ihe na-aga n'ihu, usoro ịkpụzi wax ọhụrụ na-aga n'ihu, na ụdị ihe dị iche iche dị maka ịkpụzi na-abawanye. Ugbu a, usoro nke iwepụ ebu anaghịzi ejedebe na agbaze, na ihe ndị na-akpụzi abụghị nanị na ihe ndị na-emepụta ihe. A pụkwara iji ihe ọkpụkpụ plastik mee ihe. N'ihi na ihe nkedo enwetara site na usoro a nwere ezi akụkụ dị elu yana ụkpụrụ ịdị ala dị ala, a na-akpọkwa nkedo nkenke.

Akụkụ bụ isi nkeitinye ego nkedobụ na a na-eji ebu a na-agbaze agbaze mgbe a na-eme shei ahụ. N'ihi na ọ dịghị mkpa ịbịaru ebu, shei bụ integral na-enweghị a nkewa n'elu, na shei na-mere nke refractory ihe na magburu onwe elu okpomọkụ arụmọrụ. Nkedo itinye ego nwere ike imepụta ihe nkedo nwere ụdị dị mgbagwoju anya, nwere opekata mpe mgbidi 0.3mm yana dayameta kacha nta nke oghere nkedo nke 0.5 mm. Mgbe ụfọdụ na mmepụta, akụkụ ụfọdụ mejupụtara ọtụtụ akụkụ nwere ike jikọta ya n'ozuzu ya site n'ịgbanwe nhazi ahụ ma guzobe ozugbo site na ntinye ego. Nke a nwere ike ịzọpụta nhazi mmadụ-awa na metal ihe oriri, na-eme ka Ọdịdị nkeakụkụ nkedoọzọ ezi uche.

Ibu nke nkedo ewepụtara site na ntinye ntinye ego na-adịkarị site na iri iri gram ruo ọtụtụ kilogram, ma ọ bụ ọbụna iri kilogram. Ihe nkedo dị oke arọ adịghị adabara maka nkedo itinye ego n'ihi njedebe nke arụmọrụ nke ihe a na-akpụzi na ihe isi ike na-eme shei.

Ihe nkedo emepụtara site na itinye ego na ntinye egoanaghị ejedebe site na ụdị alloys, karịsịa maka ihe ndị na-esi ike ịkpụ ma ọ bụ ịmepụta, nke nwere ike igosi ịdị elu ya. Otú ọ dị, mmepụta nkedo itinye ego nwekwara ụfọdụ adịghị ike, karịsịa n'ihi ọnụ ọgụgụ dị ukwuu nke usoro, usoro mmepụta ogologo oge, usoro nkà na ụzụ dị mgbagwoju anya, na ọtụtụ ihe na-emetụta àgwà nke nkedo, bụ nke a ghaghị ịchịkwa nke ọma iji mee ka mmepụta ahụ guzosie ike.

Tụnyere usoro nkedo ndị ọzọ, akụkụ dị ịrịba ama nke itinye ego na ntinye ego bụ iji ihe mgbaze na-agbaze eme shea. A na-eri otu ụdị ntinye ego mgbe ọ bụla arụpụtara shei. Ihe dị mkpa dị mkpa maka inweta nkedo dị elu nke nwere ezi akụkụ dị elu yana ụkpụrụ ịdị ala dị ala bụ ihe eji etinye ego na nhazi nke akụkụ dị elu yana ụkpụrụ ịdị ala dị ala. Ya mere, ịrụ ọrụ nke ihe eji eme ihe (nke a na-akpọ ihe eji eme ihe), àgwà nke ịkpụzi (ụkpụrụ eji etinye ego) na usoro ịkpụzi ga-emetụta kpọmkwem àgwà nke ntinye ego.

A na-ejikarị ihe nkedo itinye ego eme ihe ugbu a n'ime shei nke ihe na-etugharị multilayer mere. Mgbe etinyere modul ahụ ma kpuchie ya na mkpuchi refractory, fesa granular refractory ihe, wee kpoo ya ma sie ike, ma na-emeghachi usoro a ọtụtụ ugboro ruo mgbe oyi akwa ihe na-eme ka ọ dị mkpa. N'ụzọ dị otú a, a na-emepụta shei multi-layer na modul, bụ nke a na-adọbakarị maka oge iji kpochaa kpamkpam ma sie ike, wee mebie ya iji nweta shei multi-layer. Ụfọdụ shells multi-layer kwesịrị ka ejupụta na ájá, ma ụfọdụ adịghị. Mgbe a risịrị nri, enwere ike ịwụsa ha ozugbo, nke a na-akpọ shei dị elu.

Ogo nke shei ahụ na-emetụta kpọmkwem àgwà nke nkedo. Dabere na ọnọdụ ọrụ nke shei ahụ, ihe ndị chọrọ ịrụ ọrụ nke shei ahụ gụnyere:
1) Ọ nwere ike okpomọkụ nkịtị dị elu, ike okpomọkụ dị elu kwesịrị ekwesị na ike fọdụrụnụ dị ala.
2) Ọ nwere ikuku ikuku dị mma (karịsịa ikuku ikuku dị elu) na conductivity thermal.
3) Ọnụ ọgụgụ mgbasawanye nke linear dị ntakịrị, mgbasawanye ọkụ dị ala na mgbasawanye bụ otu.
4) Magburu onwe iguzogide oyi ngwa ngwa na okpomọkụ na thermochemical kwụsie ike.

Njirimara ndị a nke shea nwere njikọ chiri anya na ihe eji eme ihe na-emepụta shea na usoro nhazi. Shell ihe na-agụnye refractory ihe, binders, solvents, hardeners, surfactants, wdg N'ime ha, ihe refractory ihe na-ekekọta kpọmkwem na-etolite shei, nke bụ isi shei ihe. Ihe ngbanwe a na-eji na ntinye ntinye ego na-abụkarị ájá silica, corundum na aluminosilicate refractories (dị ka ụrọ na-agbapụta agbagharị na banadium aluminom, wdg). Na mgbakwunye, a na-eji ájá zircon na ájá magnesia mee ihe mgbe ụfọdụ.

A na-edozi ihe na-eme ka ntụ ntụ ntụ na ihe nkedo na-edozi n'ime mkpuchi mkpuchi, a na-efesakwa ihe mkpuchi granular na mkpuchi mkpuchi mgbe a na-eme shei. Ihe eji eme ihe eji eme ihe ntughari nke gunyere ethyl silicate hydrolysate, iko mmiri na silica sol. Agba a kwadebere na ethyl silicate nwere ihe mkpuchi dị mma, ike shei dị elu, obere nrụrụ ọkụ, oke akụkụ nke nkedo enwetara, yana mma elu. A na-ejikarị emepụta ihe nkedo alloy dị mkpa na ihe nkedo ndị ọzọ nwere oke elu chọrọ. Ọdịnaya SiO2 nke ethyl silicate emepụtara na China bụ n'ozuzu 30% ruo 34% (oke ntakiri), ya mere a na-akpọ ya ethyl silicate 32 (32 na-anọchite anya nkezi nkezi nke SiO2 na ethyl silicate). Ethyl silicate nwere ike ịrụ ọrụ njikọ naanị mgbe hydrolysis gasịrị.

Shei mkpuchi a kwadebere na iko mmiri dị mfe imebi na ịgbawa. E jiri ya tụnyere ethyl silicate, ihe nkedo ndị a na-emepụta nwere ezi akụkụ dị ala na ịdị elu dị elu. Mmiri iko ihe nkedo kwesịrị ekwesị maka mmepụta nke obere nkịtị ígwè nkedo naihe nkedo alloy na-abụghị nke ígwè. Iko mmiri maka nkedo itinye ego na-enwekarị modul nke 3.0 ~ 3.4 yana njupụta nke 1.27 ~ 1.34 g/cm3.

Silica sol binder bụ ihe ngwọta mmiri nke silicic acid, nke a makwaara dị ka silica sol. Ọnụ ya bụ 1/3 ~ 1/2 dị ala karịa nke ethyl silicate. Ogo nke nkedo a na-emepụta site na iji silica sol dị ka ihe nkedo dị elu karịa nke iko mmiri. A na-emeziwanye ihe na-ejikọta ya nke ọma. Silica sol nwere ezigbo nkwụsi ike na enwere ike ịchekwa ya ogologo oge. Ọ dịghị achọ ndị siri ike pụrụ iche mgbe ị na-eme shells. Ike dị elu nke shea dị mma karịa nke ethyl silicate shells, ma silica sol nwere adịghị mma wettability na itinye ego na-ewe ogologo oge iji sie ike. Isi usoro nke ime shei gụnyere modul degenreasing, mkpuchi na sanding, ihicha na hardening, demoulding na rie nri.