Phab ntsa putty yog ib feem tseem ceeb ntawm cov txheej txheem tha xim. Nws yog ib tug sib tov ntawm binders, fillers, pigments thiab additives uas muab cov nto ib tug du tiav. Txawm li cas los xij, thaum lub sij hawm tsim kho ntawm phab ntsa putty, qee qhov teeb meem tshwm sim tuaj yeem tshwm sim, xws li deburring, foaming, thiab lwm yam. Deburring yog tshem tawm cov khoom siv ntau dhau los ntawm qhov chaw, thaum blistering yog tsim ntawm cov hnab pa me me ntawm qhov chaw. Ob qho ntawm cov teeb meem no tuaj yeem cuam tshuam rau qhov kawg tshwm sim ntawm cov phab ntsa pleev xim. Txawm li cas los xij, muaj kev daws teeb meem rau cov teeb meem no - siv HPMC hauv phab ntsa putty.
HPMC sawv cev rau hydroxypropyl methylcellulose. Nws yog ib qho khoom siv dav siv hauv ntau yam kev lag luam nrog rau kev tsim kho. HPMC yog ib qho zoo tagnrho additive rau phab ntsa putties raws li nws txhim kho cov workability, cohesion thiab lub zog ntawm cov sib tov. Ib qho txiaj ntsig tseem ceeb ntawm kev siv HPMC yog lub peev xwm los txo qis kev deburring thiab blistering. Nov yog qhov kev faib tawm ntawm HPMC tuaj yeem pab tshem tawm cov teeb meem no:
Deburring
Deburring yog ib qho teeb meem tshwm sim thaum siv phab ntsa putty. Qhov no tshwm sim thaum muaj cov khoom siv ntau dhau ntawm qhov chaw uas yuav tsum tau muab tshem tawm. Qhov no tuaj yeem ua rau qhov tsis sib xws thiab cov xim tsis sib xws thaum pleev xim rau phab ntsa. HPMC tuaj yeem muab ntxiv rau cov phab ntsa putty sib tov kom tsis txhob muaj teeb meem tshwm sim.
HPMC ua raws li kev tiv thaiv kab mob hauv phab ntsa, ua kom lub sijhawm ziab ntawm qhov sib tov. Qhov no tso cai rau lub sijhawm kom txaus los khom ntawm qhov chaw tsis muaj cov khoom siv ntau dhau. Nrog HPMC, cov hmoov sib tov tuaj yeem siv rau hauv ib txheej yam tsis muaj kev rov ua dua.
Tsis tas li ntawd, HPMC nce viscosity tag nrho ntawm phab ntsa putty sib tov. Qhov no txhais tau tias qhov sib tov yog ruaj khov thiab tsis tshua muaj kev sib cais los yog agglomerate. Yog li ntawd, cov phab ntsa putty sib tov yog yooj yim rau kev ua hauj lwm nrog thiab kis tau yooj yim dua nyob rau saum npoo, txo qhov yuav tsum tau rau deburring.
npuas
Blistering yog lwm qhov teeb meem uas tshwm sim thaum lub sij hawm tsim kho ntawm phab ntsa putty. Qhov no tshwm sim thaum lub putty tsim cov hnab ntim cua me me ntawm qhov chaw thaum nws qhuav. Cov hnab ntim cua no tuaj yeem ua rau qhov chaw tsis sib xws thiab ua rau qhov kawg ntawm phab ntsa thaum nws pleev xim. HPMC tuaj yeem pab tiv thaiv cov npuas no los ntawm kev tsim.
HPMC ua yeeb yaj kiab yav dhau los hauv phab ntsa putty. Thaum lub putty dries, nws tsim ib zaj duab xis nyias nyob rau saum npoo ntawm putty. Cov yeeb yaj kiab no ua raws li kev thaiv, tiv thaiv cov dej noo los ntawm kev nkag mus tob rau hauv cov phab ntsa putty thiab tsim cov hnab ntim cua.
Tsis tas li ntawd, HPMC kuj ua rau kom muaj zog sib txuas ntawm phab ntsa putty rau saum npoo. Qhov no txhais tau hais tias lub putty adheres zoo dua rau saum npoo, txo qhov tsim ntawm cov hnab tshos huab cua lossis qhov khoob ntawm lub putty thiab saum npoo. Nrog HPMC, cov phab ntsa putty sib xyaw ua kom muaj kev sib raug zoo nrog rau saum npoo, tiv thaiv blistering los ntawm qhov tshwm sim.
nyob rau hauv xaus
Phab ntsa putty yog ib qho tseem ceeb ntawm cov txheej txheem tha xim, thiab nws yog ib qho tseem ceeb los xyuas kom meej tias nws muaj qhov zoo. Qhov tshwm sim ntawm deburring thiab blistering tuaj yeem cuam tshuam rau qhov kawg ntawm cov xim pleev xim rau phab ntsa. Txawm li cas los xij, siv HPMC ua ib qho ntxiv rau phab ntsa putty tuaj yeem pab tshem tawm cov teeb meem no. HPMC ua raws li cov txheej txheem retarder, ua kom cov viscosity ntawm cov khoom sib tov thiab tiv thaiv cov khoom ntau dhau los ntawm kev tsim ntawm qhov chaw. Nyob rau tib lub sijhawm, nws pab tsim kom muaj kev sib raug zoo ntawm cov phab ntsa putty thiab saum npoo, tiv thaiv kev tsim ntawm cov hnab tshos huab cua thiab npuas. Kev siv HPMC hauv phab ntsa putty kom ntseeg tau tias qhov kawg ntawm cov xim pleev xim rau phab ntsa yog du, txawm thiab zoo meej.
Post lub sij hawm: Aug-05-2023