Nkɛntɛnso a Nsu a Ɛyɛ Nwini no Ɔhyew Nya wɔ Crystal Pulling/Extrusion Molding Processes So

 

C ɔhyew yɛ adeyɛ parameter a ɛho hia wɔ crystal twe ne extrusion molding nyinaa mu, tẽẽ kyerɛ product no su, production efficiency, ne equipment stability. Ne nkɛntɛnso no fa adeyɛ no nyinaa mu, na nsonsonoe kɛse wɔ nkɛntɛnso a efi ɔhyew ahorow mu ba no mu, na ɛhwehwɛ sɛ wɔhwɛ so pɛpɛɛpɛ a wɔayɛ ama adeyɛ no mu ahwehwɛde atitiriw. Nea edidi so yi kyerɛkyerɛ nkɛntɛnso pɔtee a nsu a ɛyɛ nwini hyew nya wɔ saa akwan abien yi so kɔ akyiri, na ɛkyerɛkyerɛ mmeae a wɔhwɛ so wɔ tebea horow a ɛfa nneɛma a wɔyɛ ankasa ho mu.

 

 

I. Nkɛntɛnso a Nsu a Ɛyɛ Nwini no Ɔhyew nya wɔ Crystal Pulling Process so

 

Ade titiriw a ɛwɔ ahwehwɛ twetwe nhyehyɛe no mu (a ahwehwɛ biako ne ahwehwɛ pii nyin ka ho) ne sɛ wobenya ahwehwɛ nyin nnidiso nnidiso afi nea ayow no mu akɔ tebea a ɛyɛ den no mu denam ɔhyew a ɛwɔ mu no sohwɛ pɛpɛɛpɛ so. Nsuo a ɛma onwini no hyew prima yɛ adwuma wɔ fononoo mu onwini nhyehyɛe no so, na ɛhwɛ ɔhyew a ɛkɔ soro wɔ solid-nsu ntam kwan no so wɔ ɔkwan a ɛnteɛ so, na ɛnam so nya ahwehwɛ no su ne nyin a ɛyɛ yiye so nkɛntɛnso.

 

Sɛ nsu no hyew yɛ kɛse dodo a, ɔhyew a coolystem no tumi sɛe no nnɔɔso, na ɛma ɔhyew a ɛkɔ soro na entumi nnyina wɔ fononoo no mu ba. Ɔkwan biako so no, solid-nsu ntamgyinafo no kɔ soro na ɛbɛyɛ mmepɔwmmepɔw, di ahwehwɛ no nyin nhyehyɛe. Eyi ma sintɔ ahorow te sɛ dislocations, slips, ne aburow hye ba ntɛm, ɛma efĩ mu mpaapaemu yɛ kɛse, na ɛtew crystal ahotew ne mfiridwuma su soevere cases, ebetumi ama crystal mpaapaemu ne onyin mu ntwitwiridii. Ɔkwan foforo so no, ɔhyew a aka a efi ɔhyew mu no ntumi nsɛe wɔ bere mu, na ɛtrɛw ahwehwɛ nyin kyinhyia no mu na ɛtew nea ɛyɛ adwuma yiye so, bere a ɛma fononoo no afã horow no nyin ntɛmntɛm na ɛma mfiri no nkwa nna yɛ tiaa.

 

 

 

 

Sɛ nsuo no hyeɛ sua dodo a, ɛma onwini boro so, na ɛma thermal field tempera no kɔ fam ntɛmntɛm dodo na ɛma ɔhyew a ɛkɔ soro dodo ba solid-liquid interface no so. Eyi ma ahwehwɛ nyin a ɛnteɛ, na ɛtaa nya nsɛm te sɛ ne kɛse a ɛsakrasakra ne saces a ɛyɛ den. Bere koro no ara mu no, ɔhyew mu nhyɛso a ɛboro so ba ahwehwɛ no mu, na ɛma ɛyɛ mmerɛw sɛ ɛpaapae bere a wɔreyɛ ho adwuma akyiri yi no. Bio nso, nsu a ɛyɛ hyew a ɛba fam dodo betumi ama coes no ayɛ nwini anaasɛ ayɛ nwini, asiw nhama no ano, aka sɛnea onwini nhyehyɛe no yɛ adwuma sɛnea ɛsɛ, na mpo asɛe fononoo no ano aduru no.

 

 

Wɔ ankasa adeyɛ mu no, ɛsɛ sɛ wɔde nsu a ɛma onwini hyew ma ahwehwɛ twetwe no preciseset gyina ahwehwɛ nneɛma (te sɛ silicon, germanium, sapphire) ne onyin nhyehyɛe parameters. Wɔtaa di so wɔ 20-35℃ntam, na ɛma nsuo no yɛ hyew a ɛyɛ den na wɔakwati nsakraeɛ akɛseɛ, na ɛhwɛ ma ɛyɛ tratraa a ɛyɛ den-nsuo ntam nkitahodiɛ ne ɔhyew a ɛyɛ den, na ɛnam so nya ahwehwɛ a ɛyɛ papa.

 

 

II. Nkɛntɛnso a Nsu a Ɛyɛ Nwini no Ɔhyew nya wɔ Extrusion Moldg Process so

 

 

Wɔ extrusion molding (a ɛfa molecule nneɛma a ɛkorɔn te sɛ plastic ne rɔba) mu no, nsuo a ɛyɛ nwini hyew yɛ adwuma tẽẽ wɔ melt no so wɔ extrusion akyi, ɛka product shaping, dimensioal accuracy, ne mfiridwuma su. Ntease a ɛwɔ ne tumidi mu no na ɛkyerɛ sɛnea nneɛma a etwa to no twam no tẽẽ.

 

 

Sɛ nsuo no hyeɛ kɔ soro dodo a, onwini no yɛ brɛoo dodo, ɛtrɛwmelt shaping bere mu. Ɛnyɛ den sɛ eyi bɛma nneɛma a wɔyɛ no so atew a ɛnteɛ, ne nsusuwii a ɛkɔ akyiri dodo, ne sintɔ ahorow te sɛ nsu a ɛkɔ fam agyiraehyɛde ne asorɔkye a ɛwɔ soro. Wɔ nneɛma a ɛyɛ hyew-te nka (sucas PVC, PE) ho no, nsuo hyew a ɛkɔ soro dodo betumi ama ayɛ mmerɛw a ɛto so abien, na ɛde nsɛm a ɛfa abata ne deformation ho aba, bere a ɛsan nso trɛw nneɛma a wɔyɛ no mu na ɛtew adwumayɛ so. Bio nso, onwini a ɛnnɔɔso mma nhyɛso a ɛwɔ mu no ntumi nkɔ koraa, na ɛma ade no yɛ mmerɛw sɛ ɛbɛkyinkyin na ɛpaapae bere a wɔde redi dwuma akyiri yi no.

 

 

 

 

Sɛ nsu no hyew sua dodo a, onwini no yɛ ntɛmntɛm dodo, na ɛma nsu a ɛyɛ nwini no ani yɛ den ntɛmntɛm bere a emu no kɔ so yɛ nwini no. Ɛnyɛ den sɛ eyi bɛma nsonsonoe kɛse aba ɔhyew mu wɔ emu ne akyi, na ɛde nhyɛso a ɛwɔ ade no mu ne nsɛm te sɛ mpaapaemu ne akisikuru ba. Wɔ th bere mu no, onwini a ɛba ntɛmntɛm no brɛ ade no ani hyerɛn ase, na ɛde sintɔ ahorow a ɛte sɛ pitting ne scratches ba; wɔ nneɛma a wɔde afasu yɛ teateaa-fasuo ho no, ɛbɛtumi nso ama nwene a ɛnwie pɛyɛ ne excessrrs aba anoano ne ntwea so.

 

 

Extrusion nneɛma ahorow wɔ ahwehwɛde ahorow ma nsu a ɛma onwini hyew. Sɛ nhwɛso no, nsu hyew ma rigid PVC extrusion no taa di so bween 15-25 digrii , mmerɛw PVC wɔ 25-30 digrii , ne polyethylene ne polypropylene wɔ 20-30 digrii . Bere a wɔreyɛ no, ɛsɛ sɛ wɔyɛ nsakrae wɔ nsu mu hyew mu wɔ ɔkwan a ɛyɛ mmerɛw so a egyina nneɛma no su, nneɛma a wɔyɛ no kɛse, ne ne nsusuwii so, bere a wɔma nsu no hyew yɛ pɛ na wɔakwati nneɛma no sintɔ a ɛnam mpɔtam hɔ onwini a ɛnteɛ so de ba no.

 

 

 

 

Sɛ yɛbɛbɔ no mua a, nkɛntɛnso a nsuo a ɛyɛ nwini nya wɔ ahwehwɛ twetwe ne extrusion molding akwan nyinaa so no di akɔneaba wɔ "ɔhyeɛ a ɛkɔ soro a wɔde di dwuma" ne "afiri a wɔde yɛ nneɛma/nyini a ɛgyina pintinn" ho. Nsu a ɛyɛ hyew dodo ne nea ɛba fam nyinaa bɛma nneɛma a wɔyɛ no yiye so atew na ama nneɛma a wɔyɛ no so atew. Wɔ nneɛma a wɔyɛ ankasa mu no, ɛho hia sɛ wɔde nsuo hyeɛ a ɛfata a egyina dwumadie a wɔhwehwɛ ne nneɛma a ɛwɔ mu so si hɔ, na wɔde nsuo a wɔde di dwuma no sohwɛ nhyehyɛeɛ a ɛyɛ pɛpɛɛpɛ hyehyɛ mu de hwɛ sɛ dwumadie no bɛgyina pintinn na ama nneɛma a wɔde yɛ adwuma no akɔ so ne mfasoɔ a ɛwɔ so no atu mpɔn.