Nkawom Rɔba a wɔde yɛ nneɛma yɛ nneɛma atitiriw a ɛho hia wɔ nnɛyi nnwuma mu, na nneɛma atitiriw a wɔde yɛ no bi ne rɔba a wɔannoa, nneɛma ahorow a wɔde afrafra, ne nhama ne dade nneɛma a wɔde yɛ nneɛma a wɔde yɛ nneɛma.
Wɔ kar adwumayɛ mu no, . Automotive rubber nneɛma a wɔtɔn no kɛse . Wo ne nnwumakuw a wɔyɛ nneɛma no nyɛ biako yiye. Ɛdenam standardized formulas ne precision processing technologies so no, ɛma wonya rɔba afã horow a ɛyɛ den ma kar adwumayɛbea ahorow a edi mũ ne aguadi akyi gua no.
Nneɛma titiriw a wɔde yɛ rɔba nneɛma no bi ne nneɛma atitiriw asia: mastication, afrafra, calendering, extrusion, molding, ne vulcanization. Rɔba a wɔde yɛ adwuma no nyinaa mu titiriw ne sɛ wɔbɛkari pɛ wɔ "plasticity" ne "elasticity" mu: ɛdenam akwan a wɔfa so yɛ adwuma te sɛ mastication ne afrafra so no, wɔdannan elastic rɔba ma ɛbɛyɛ "masticated rubber" a ɛwɔ plasticity; Afei wɔde nnuru ahorow a wɔde afrafra ka ho ma wɔyɛ nneɛma a wɔayɛ no fã bi; Awiei koraa no, wɔyɛ vulcanization ayaresa de san yɛ den kɛse na ɛma mfiridwuma mu nneɛma yɛ papa.
Eyi nso yɛ mfiridwuma mu nkitahodi atitiriw a . Automotive rubber nneɛma a wɔtɔn no kɛse . Fa w’adwene si so bere a worepaw rɔba nneɛma a wɔde ma a ɛyɛ papa no.
rɔba ho mfiridwuma ho nimdeɛ .
Mastication nhyehyɛe .
Raw rɔba a wɔsɛe no yɛ adeyɛ a ɛdan rɔba a wɔannoa no fi tebea a ɛyɛ den a ɛyɛ den mu kɔ plastic tebea a ɛyɛ mmerɛw, a ɛnyɛ den sɛ wɔbɛyɛ ho adwuma mu denam mfiri adwennwen, ɔhyew, oxygen, anaa nnuru a wɔde boa a wɔde ka ho so.
Botae a ɛwɔ mastication mu ne sɛ ɛbɛtew rɔba a ɛyɛ den no so, ama plasticity akɔ soro, na wɔanya nsu a ɛfata a ɛbɛma wɔadi nneɛma a edi hɔ te sɛ afrafra, candering, extrusion, molding, ne vulcanization ho ahwehwɛde ahorow ho dwuma.
Mastication plasticity a ɛfata a wobɛhu no yiye no ho hia kɛse ma rɔba nneɛma a wɔde yɛ adwuma no a ɛyɛ den ne nneɛma a wɔawie a etwa to no su. Wɔ nhyiam nhyehyɛe ahwehwɛde ahorow no nnyinaso so no, ɛsɛ sɛ wɔtew plasticity so sɛnea wobetumi na ama ahoɔden a wɔde di dwuma no so atew na wɔakwati sɛ wɔbɛhyew.
Mprempren, esiane sɛ rɔba a ɛyɛ viscosity a ɛkɔ so daa ne rɔba a ɛba fam a ɛba bere nyinaa no nti, rɔba nneɛma bi a ɛyɛ fɛ betumi akɔ mu tẽẽ a ɛnyɛ nea ɛyɛ hu. Saa su yi nso yɛ nea nnipa pii bu . Automotive rubber nneɛma a wɔtɔn no kɛse . Sɛ́ ade titiriw a ɛkyerɛ ahoɔden a wɔkora so ne sɛnea ɛyɛ adwuma yiye.
Wɔ rɔba adwumayɛ mu no, wɔkyekyɛ akwan a wɔfa so yɛ ade no mu titiriw yɛ no mfiri a wɔde twetwe nipadua mu nneɛma ne nnuru a wɔde twetwe nipadua no .:
Mfiri a wɔde twetwe nneɛma: Wɔde rɔba a wɔde fra rɔba a wɔabue mu, rɔba a wɔde fra mu a ɛwɔ mu, anaasɛ mfiri a wɔde twitwa nneɛma a wɔde twitwa nneɛma mu di dwuma.
Chemical Mastication: Wɔde nnuru a wɔde yɛ nneɛma ka ho wɔ mfiridwuma mu adeyɛ ase ma ɛyɛ ntɛmntɛm wɔ viscosity reduction reaction no ho na ɛma mastication no yɛ adwuma yiye.
Nhwɛso ahorow a ɛfa nhyehyɛe sohwɛ ho .:
Open mill mastication .: Mpɛn pii no, ɔhyew no nnu 80°C, a ɛyɛ mfiri a ɛyɛ hyew a ɛba fam no dea.
Nneɛma a wɔde fra nneɛma mu ne nea wɔde fra nneɛma a wɔde fra mu .: Rɔba a wɔde gu mu no hyew fi 120°C kosi 180°C, a ɛyɛ mfiri a ɛyɛ hyew kɛse a ɛma ɛyɛ mmerɛw no dea.
Ansa na wɔbɛfra mu no, mpɛn pii no, ɛsɛ sɛ rɔba a wɔannoa no yɛ nea edi kan te sɛ rɔba a ɛyow, rɔba a wɔtwa, rɔba a wɔpaw, ne rɔba a ɛbubu na ama wɔatumi ayɛ adwuma akyiri yi.
Mastication su ahorow a ɛwɔ rɔba ahorow ahorow mu .:
Abɔdeɛ mu rɔba: Roll no hyeɛ yɛ 30–40°C, na mastication berɛ yɛ simma 15–20.
Styrene-butadiene rɔba: Wobetumi de adi dwuma a wɔmfa mastication nni dwuma, anaasɛ wobetumi ayɛ mastication de ama apete atu mpɔn.
CIS-1,4-polybutadiene rɔba: Ɛwɔ mooney a ɛyɛ den a ɛba fam na wobetumi de adi dwuma a wɔmfa aduru biara nhyɛ mu.
Chloroprene rɔba: Ɛwɔ plasticity a ɛkorɔn na ebetumi ayɛ teateaa mpɛn 3–5.
Ethylene-propylene rɔba: Ɛwɔ molecule nhyehyɛe a ɛyɛ saturated, enti mastication effect no nyɛ nea ɛho hia.
Nitrile Rɔba: Ɛwɔ toughness a ɛkorɔn ne ɔhyew awo ntoatoaso, enti low-temperature segmented mastication fata.
Rɔba a wɔde yɛ nneɛma yɛ nneɛma atitiriw a ɛho hia wɔ nnɛyi nnwuma mu, na nneɛma atitiriw a wɔde yɛ no bi ne rɔba a wɔannoa, nneɛma ahorow a wɔde afrafra, ne nhama ne dade nneɛma a wɔde yɛ nneɛma a wɔde yɛ nneɛma.
