Mpɛn pii no, nhoma ahorow a wɔde sua plastic a wɔde yɛ plastic no bu plastic a ɛwɔ skru no fã a ɛyɛ den a ɛde nneɛma kɔ no sɛ mpa a ɛyɛ den a entumi nkɔ plastic granules ntam. Afei wɔkyerɛ ahoɔhare a ɛde kɔ anim no denam tebea a eye a ɛfa kankyee ne akasakasa a ɛda mpa a ɛyɛ den yi ne toa no fasu, skru a wɔde ma no ani, ne skru kwan no ani ntam no so.
Saa kwan yi yɛ soronko koraa wɔ nokwasɛm ho na wontumi mfa nhwehwɛ sɛnea wɔde plastic granules a ɛsono ne nsusuwii ma no mu. Sɛ plastic granules no yɛ nketewa a, ɛbɛhyehyɛ na ahwe ase bere a toa no fasu no retwe akɔ n’anim no, na nkakrankakra abɔ mu ayɛ no plugs a ɛyɛ den no. Sɛ granules no ntwemu bɛyɛ sɛ screw channel no bun yɛ pɛ a, wɔn kwan no yɛ linear motion titiriw wɔ screw channel no so radially, ne linear motion a ɛwɔ anim kakra. Esiane sɛ wɔahyehyɛ plastic no yiye wɔ skru kwan no mu bere a granules no yɛ akɛse nti, ahoɔhare a ɛde kɔ no yɛ brɛoo. Sɛ granules no yɛ kɛse araa ma ne kɛse boro screw channel no mu dɔ bere a wɔahyɛne compression section no mu a, plastic no bɛkɔ skru no ne barrel no ntam. Sɛ tumi a ɛtwe kɔ anim no nnɔɔso sɛ ebetumi adi tumi a ɛho hia na ama plastic granules no ayɛ petee no so nkonim a, plastic no bɛkɔ so akɔda skru kwan no mu na ɛrenkɔ n’anim.
Sɛ plastic bɛn baabi a ɛbɛbɔ a, plastic a ɛne toa no di nkitaho no fi ase nwene, na ɛyɛ sini a ayow. Sɛ saa sini a ayow yi mu duru boro nsonsonoe a ɛda skru ne toa no ntam a, skru no mpampam no ano de radially twetwe sini a ayow no fi toa no mu fasu no so kɔ skru mpampam no ntini no so, na ɛde nkakrankakra ka bom yɛ vortex-te sɛ flow zone-ayɛ ɔtare no-wɔ skru no ani a ɛkɔ anim no so mpampam.
Esiane sɛ skru kwan no mu dɔ a ɛkɔ fam nkakrankakra wɔ ɔfã a ayɛ hyew no mu ne ɔtare a wɔabɔ no a ɛhyɛ no nti, wɔhyɛ mpa a ɛyɛ den no ma ɛkɔ toa no mu ɔfasu no so, na ɛnam so ma ɔhyew a ɛkɔ toa a ɛyɛ hyew no mu kɔ mpa a ɛyɛ den no mu ntɛmntɛm. Bere koro no ara mu no, skru no a ɛkyinkyini no ma twitwa ade wɔ sini a ayɛ hyew no so wɔ mpa a ɛyɛ den no ne toa no mu ɔfasu no ntam, na ɛma ade a ɛyɛ den no nwene wɔ baabi a ɛda ntama a ayow ne mpa a ɛyɛ den no ntam. Bere a mpa a ɛyɛ den no twitwiw kɔ n’anim no, ne kɛse so tew nkakrankakra, bere a ɔtare a ayɛ nwini no mu duru kɔ soro nkakrankakra. Sɛ mpa a ɛyɛ den no mu duru so tew ntɛmntɛm sen sɛnea skru kwan no mu dɔ so tew a, mpa a ɛyɛ den no betumi asiw skru kwan no fã bi anaasɛ koraa, na ɛde nsakrae aba plasticization mu, anaasɛ ɛde ɔhyew a ɛboro so wɔ mpɔtam hɔ esiane mpɔtam hɔ nhyɛso a ɛboro so ne frictional heat a ɛkɔ soro nti.
Wɔ homogenization fã a ɛwɔ skru no mu no, mpa a ɛyɛ den no abubu esiane ne kɛse nti, na ayɛ nneɛma nketenkete a ɛyɛ den a wɔapete wɔ ɔtare a wɔabɔ no mu. Saa nneɛma a ɛyɛ den yi nam friction ne ɔhyew a ɛne nsu a atwa ho ahyia no so na ɛwosow. Saa bere yi de, skru no adwuma titiriw ne sɛ ɛbɛkanyan plastic a ayow no na ama afrafra pɛpɛɛpɛ. Ahoɔhare a ɛbɔ no kyekyɛ fi ahoɔhare a ɛkorɔn sen biara a ɛbɛn toa no fasu so kosi ahoɔhare a ɛba fam koraa a ɛbɛn skru kwan no ase. Sɛ screw channel no mu dɔ nyɛ den na melt viscosity no yɛ kɛse a, akasakasa a ɛda melt molecules ntam no bɛyɛ kɛse.
Esiane nsonsonoe kɛse a ɛwɔ melting rate, melt viscosity, melting temperature range, viscosity sensitivity to temperature and shear rate, corrosiveness a ɛwɔ high-temperature decomposition gases mu, ne coefficient of friction a ɛda plastic asinasin ntam nti, ordinary general-purpose screws betumi anya shear heat a ɛkorɔn dodo wɔ afã horow bi mu bere a wɔde melt soronko reyɛ plastic ho adwuma su ahorow (te sɛ PC, PA, molecule-mu duru a ɛkorɔn-ABS, PP-R, PVC, ne nea ɛkeka ho). Mpɛn pii no wobetumi ayi adeyɛ yi afi hɔ denam ahoɔhare a skru no so tew so, nanso akyinnye biara nni ho sɛ eyi ka sɛnea wɔyɛ no yiye no. Sɛnea ɛbɛyɛ na yɛatumi ayɛ plastic yi a etu mpɔn no, yɛn adwumakuw no ayɛ plasticizing screw ne nsuhina titiriw ama saa plastic yi. Wɔayɛ saa nkɔnsɔnkɔnsɔn ne nsuhina titiriw yi sɛ wɔde bedi nsɛm atitiriw te sɛ solid friction coefficient, melt viscosity, ne melting speed a plastics a yɛadi kan aka ho asɛm no ho dwuma.
