Qhov piv ntawm Polyol thiab isocyanate:

Polyol muaj tus nqi hydroxyl siab thiab qhov hnyav molecular loj, uas yuav ua rau kom qhov ceev ntawm kev sib txuas thiab pab txhim kho qhov ceev ntawm cov ua npuas ncauj. Kev kho qhov ntsuas isocyanate, uas yog, qhov piv ntawm molar ntawm isocyanate rau cov hydrogen nquag hauv polyol, yuav ua rau kom muaj qib ntawm kev sib txuas thiab ua rau kom qhov ceev ntxiv. Feem ntau, qhov ntsuas isocyanate yog nruab nrab ntawm 1.0-1.2.

 

Kev xaiv thiab koob tshuaj ntawm tus neeg sawv cev ua npuas ncauj:

Hom thiab qhov ntau npaum li cas ntawm cov tshuaj ua npuas ncauj cuam tshuam ncaj qha rau qhov nrawm ntawm huab cua nthuav dav thiab qhov ceev ntawm cov npuas tom qab ua npuas ncauj, thiab tom qab ntawd cuam tshuam rau qhov tuab ntawm lub plhaub. Kev txo qhov ntau npaum li cas ntawm cov tshuaj ua npuas ncauj tuaj yeem txo qhov porosity ntawm cov npuas ncauj thiab ua rau qhov ceev ntxiv. Piv txwv li, dej, ua cov tshuaj ua npuas ncauj, ua rau isocyanate ua rau muaj carbon dioxide. Kev nce qhov ntau ntawm cov dej yuav txo qhov ceev ntawm cov npuas ncauj, thiab nws qhov ntxiv yuav tsum tau tswj hwm nruj me ntsis.

 

Tus nqi ntawm catalyst:

Tus catalyst yuav tsum xyuas kom meej tias qhov kev ua npuas dej thiab cov tshuaj gel hauv cov txheej txheem ua npuas dej ncav cuag qhov sib npaug dynamic, txwv tsis pub lub npuas tawg lossis shrinkage yuav tshwm sim. Los ntawm kev sib xyaw ua ke ntawm cov tshuaj alkaline tertiary amine uas muaj zog heev uas muaj cov nyhuv catalytic muaj zog rau cov tshuaj foaming thiab cov nyhuv catalytic muaj zog rau cov tshuaj gel, cov tshuaj catalyst tsim nyog rau lub kaw lus self-skinning tuaj yeem tau txais.

 

Kev tswj kub:

Kub ntawm pwm: Qhov tuab ntawm daim tawv nqaij yuav nce ntxiv thaum qhov kub ntawm pwm txo qis. Kev nce qhov kub ntawm pwm yuav ua rau qhov kev ua haujlwm sai dua, uas yog qhov zoo rau kev tsim cov qauv ntom dua, yog li ua rau qhov ntom dua, tab sis qhov kub siab dhau yuav ua rau cov tshuaj tiv thaiv tsis tuaj yeem tswj tau. Feem ntau, qhov kub ntawm pwm raug tswj ntawm 40-80 ℃.

 

Kub ntawm kev siav:

Kev tswj qhov kub thiab txias rau 30-60 ℃ thiab lub sijhawm rau 30s-7 feeb tuaj yeem tau txais qhov sib npaug zoo tshaj plaws ntawm lub zog demoulding thiab kev ua haujlwm zoo ntawm cov khoom.

 

Kev tswj siab:

Qhov ua kom lub siab nce ntxiv thaum lub sijhawm ua npuas dej tuaj yeem tiv thaiv kev nthuav dav ntawm cov npuas dej, ua rau cov qauv ua npuas dej me dua, thiab ua rau qhov ceev nce ntxiv. Txawm li cas los xij, kev nias ntau dhau yuav ua rau cov pwm xav tau ntau ntxiv thiab ua rau tus nqi nce ntxiv.

 

Kev sib xyaw ceev:

Yog tias koj ua kom qhov ceev ntawm kev sib tov kom zoo, ces cov khoom siv raw yuav sib tov sib npaug zoo dua, ua rau cov tshuaj sib xyaw ua ke zoo dua, thiab pab kom cov khoom sib xyaw ceev dua. Txawm li cas los xij, yog tias koj ua kom ceev dhau, cov tshuaj yuav ua rau muaj cua ntau dhau, ua rau qhov ceev tsawg dua, thiab feem ntau nws yuav tswj tau ntawm 1000-5000 rpm.

 

Cov coefficient ntawm kev sau ntau dhau:

Qhov ntau npaum li cas ntawm cov tshuaj sib xyaw ua ke ntawm cov khoom ua rau daim tawv nqaij tus kheej yuav tsum ntau dua li qhov ntau npaum li cas ntawm cov tshuaj ua npuas dawb. Nyob ntawm cov khoom thiab cov khoom siv, feem ntau cov coefficient overfilling yog 50% -100% kom tswj tau qhov siab ntawm pwm, uas yog qhov ua rau cov kua ntawm cov neeg sawv cev ua npuas hauv txheej tawv nqaij.

 

Lub sijhawm ua kom cov tawv nqaij sib npaug:

Tom qab cov polyurethane ua npuas ncauj raug nchuav rau hauv tus qauv, qhov ntev ntawm qhov chaw raug leveled, qhov tuab ntawm daim tawv nqaij. Kev tswj hwm qhov tsim nyog ntawm lub sijhawm leveling tom qab nchuav kuj yog ib qho ntawm cov txhais tau tias los tswj qhov tuab ntawm daim tawv nqaij.