Injɛkshɔn moldin na impɔtant tin fɔ mek di mɔdan manufakchurin, we de prodyuz ɔltin frɔm motoka pat to ɛvride plastic tin dɛn. Akkurat kɔlkyulɛshɔn fɔmula dɛn de ɔptimayz dis prɔses, mek shɔ se efyushɔn ɛn kwaliti. Insay dis post, yu go lan impɔtant fɔmula fɔ klamp fɔs, injɛkshɔn prɛshɔn, ɛn mɔ, fɔ mek yu injɛkshɔn moldin ɔpreshɔn dɛn bɛtɛ.
Moldin fɔ injɛkshɔn .
Injɛkshɔn moldin na kɔmpleks prɔses we de dipen pan di intrɛstin intaplay fɔ difrɛn mashin kɔmpɔnɛnt dɛn ɛn prɔses paramita dɛn. Fɔ ɔndastand di fawndeshɔnal tin dɛn fɔ dis manufakchurin tɛknik, i rili impɔtant fɔ ɔndastand di men tin dɛn we de insay.
Injekshɔn Molding Mashin Kɔmpɔnɛnt dɛn ɛn dɛn Fɔnkshɔn dɛn .
Di men tin dɛn we de insay wan injɛkshɔn moldin mashin na:
Injekshɔn Yunit: Rispɔnsibul fɔ mɛlt ɛn injɛkt di plastic matirial insay di mold kaviti.
Klamp yunit: I de ol di mold klos we dɛn de injekt am ɛn i de aplay di klamp fɔs we nid fɔ mek di mold nɔ opin ɔnda prɛshɔn.
Mold: I gɛt tu af dɛn (di kaviti ɛn di kɔr) we de mek di shep fɔ di las prɔdak.
Kontrol sistem: Rigyul ɛn monitɔr di ɔl injɛkshɔn moldin prɔses, mek shɔ se kɔnsistɛns ɛn kwaliti.
Ɛni kɔmpɔnɛnt de ple impɔtant pat fɔ mek di mashin wok fayn fayn wan ɛn i de afɛkt di kwaliti we di pat dɛn we dɛn dɔn mol gɛt dairekt wan.
Ki paramita dɛn na injɛkshɔn moldin .
Fɔ mek yu ebul fɔ gɛt di bɛst rizɔlt, i impɔtant fɔ ɔndastand ɛn kɔntrol di men tin dɛn we de dɔŋ ya:
Klamp Fos: Di fos we dɛn nid fɔ kip di mol lɔk we dɛn de injekt, mek di matirial nɔ ebul fɔ rɔnawe ɛn mek shɔ se dɛn mek di rayt pat.
Injɛkshɔn prɛshɔn: Di prɛshɔn we dɛn put pan di plastic we dɔn rɔtin as dɛn de injɛkt am insay di mold kaviti, we de afɛkt di filin spid ɛn di pat kwaliti.
injεkshכn vכlyum: di כmכnt כf plastic mεtirial we dεn injεkt insay di mכld kכva insay εvri saykl, we de sho di sayz εn wet fכ di fayn prodak.
Ɔda impɔtant paramita dɛn na injɛkshɔn spid, mɛlt tɛmpracha, kol tɛm, ɛn ejekshɔn fɔs. Dɛn fɔ tek tɛm wach ɛni wan pan dɛn tin ya ɛn ajɔst dɛn fɔ mek shɔ se dɛn gɛt pat dɛn we nɔ de chenj ɛn we gɛt ay kwaliti.
Rilayshɔn bitwin mashin spɛsifikɛshɔn ɛn molding rikwaymɛnt dɛn .
Di sɛlɛkshɔn fɔ wan injɛkshɔn moldin mashin de dipen pan di patikyula tin dɛn we di moldin prɔjek nid. Di tin dɛn we fɔ tink bɔt na:
Shot Sayz: Di maksimal volyum fɔ plastic Di mashin kin injɛkt insay wan saykl.
Klamp Fos: Di mashin in ebul fɔ kip di mold lɔk ɔnda di injɛkshɔn prɛshɔn we dɛn nid.
Injɛkshɔn prɛshɔn: Di maksimal prɛshɔn we di mashin kin mek fɔ ful-ɔp di mold kaviti.
| Molding rikwaymɛn | rilayt mashin spɛsifikɛshɔn |
| Pat saiz . | Shot Saiz fɔ di . |
| Pat kɔmplisiti . | Klamp fɔs, injɛkshɔn prɛshɔn . |
| Material tayp . | Injɛkshɔn prɛshɔn, mɛlt tɛmpracha . |
Klamp fɔs kɔlkyulɛshɔn .
Insay di wɔl fɔ injɛkshɔn moldin, klamp fɔs de ple impɔtant pat fɔ mek shɔ se di kwaliti ɛn kɔnsistɛns fɔ di fayn prodak. Bɔt wetin rili na fɔ klamp fɔs, ɛn wetin mek i impɔtant so?
Difinishɔn ɛn impɔtants fɔ klamp fɔs .
Klamp fos de rifer to di fos we dɛn nid fɔ kip di mold lɔk di tɛm we dɛn de injekt am. I de mek di mold nɔ opin ɔnda di ay prɛshɔn we di plastic we dɛn dɔn injɛkt gɛt, ɛn mek shɔ se di tin we dɛn dɔn rɔtin ful-ɔp di kaviti kɔmplit wan ɛn i de mek di shep we dɛn want.
If dɛn nɔ gɛt inof klamp fɔs, tin dɛn lɛk flash, filin we nɔ kɔmplit, ɛn dimɛnshɔnal inakurat dɛn kin apin, we kin mek di pat dɛn we nɔ fayn ɛn di kɔst fɔ mek di prodakshɔn go ɔp.
Klamp Fos Fɔmula .
Di klamp fos we dɛn nid fɔ wan patikyula moldin projɛkt kin kɔl bay we dɛn yuz di fɔmula we de dɔŋ ya:
F = am * PV / 1000
Usay:
Fɔ yuz dis fɔmula fayn fayn wan, yu go nid fɔ no di kaviti projɛkt eria ɛn di aprɔpriet filin prɛshɔn fɔ di matirial we dɛn de yuz.
Factors we de afɛkt di klamp fɔs .
Bɔku tin dɛn kin ambɔg di klamp fɔs we dɛn nid, we inklud:
Di prɔpati dɛn we dɛn gɛt:
Viskositi .
shrinkage rate .
Melt Flɔ Indeks .
Pat Jɔyometri:
Ɔndastand aw dɛn tin ya de ambɔg di klamp fɔs impɔtant fɔ mek di injɛkshɔn moldin prɔses fayn ɛn fɔ avɔyd kɔmɔn difɛkt dɛn.
Ɛgzampul dɛn ɛn prɛktikal aplikeshɔn dɛn .
Lɛ wi tink bɔt wan ɛgzampul fɔ sho di prɛktikal aplikeshɔn fɔ di klem fɔs fɔmula. Sɔmtɛm yu de mol wan pat wit wan kaviti projɛkt eria we na 250 cm^2 yuz wan matirial wit wan rɛkɔmɛnd filin prɛshɔn we na 180 kg/cm^2.
Yuz di fɔmula:
F = am PV / 1000 = 250 180 / 1000 = 45 tan
In dis kes, yu go nid wan klamp fos fɔ 45 tan fɔ mek shɔ se dɛn klos di mold fayn fayn wan ɛn pat kwaliti.
Injɛkshɔn prɛshɔn kɔlkyulɛshɔn .
Injɛkshɔn prɛshɔn na ɔda impɔtant paramita na di injɛkshɔn moldin prɔses. I de afɛkt di kwaliti fɔ di pat dɛn we dɛn dɔn mol, ɛn fɔ ɔndastand aw fɔ kɔl am impɔtant fɔ mek di prɔses fayn.
Difinishɔn ɛn impɔtant tin fɔ injɛkshɔn prɛshɔn .
Injεkshכn prεshכn de rεfεr to di fכs we dεn aplay to di mכlt plastic mεtirial as dεn injεkt am insay di mכld kכva. I de ditarmin aw kwik ɛn efishɔnal di matirial ful di kaviti, mek shɔ se di pat fɔmɛshɔn fayn ɛn minimiz difɛkt dɛn lɛk shɔt shot ɔ inkɔmplit filin.
Mentɛn di optimal injɛkshɔn prɛshɔn na impɔtant tin fɔ ajɔst kɔnsistɛns, ay kwaliti pat dɛn we de minimiz saykl tɛm ɛn matirial west.
Injɛkshɔn prɛshɔn fɔmula .
Yu kin kɔl di injɛkshɔn prɛshɔn bay we yu yuz di fɔmula we de dɔŋ ya:
Pi = P * A / AO
Usay:
Pi: injekshɔn prɛshɔn (kg/cm^2)
P: Pɔmp prɛshɔn (kg/cm^2)
A: Injekshɔn silinda ifɛktiv eria (cm^2) .
AO: Skru kros-sekshɔnal eria (cm^2)
Fɔ yuz dis fɔmula, yu go nid fɔ no di pɔmp prɛshɔn, di fayn eria fɔ di injɛkshɔn silinda, ɛn di krɔs-sɛkshɔn eria na di skru.
Factors we de afɛkt di injɛkshɔn prɛshɔn .
Bɔku tin dɛn kin ambɔg di prɛshɔn we dɛn nid fɔ gi di injɛkshɔn, lɛk:
Material Viscosity:
Get saiz ɛn dizayn:
Flɔ pat lɔng ɛn tik:
Ɛgzampul dɛn ɛn prɛktikal aplikeshɔn dɛn .
Lɛ wi tink bɔt wan ɛgzampul fɔ sho di prɛktikal aplikeshɔn fɔ di injɛkshɔn prɛshɔn fɔmula. Sɔmtɛm yu gɛt pɔmp prɛshɔn we na 150 kg/cm^2, wan injɛkshɔn silinda ifɛktiv eria we na 120 cm^2, ɛn wan skru krɔs-sɛkshɔn eria we na 20 cm^2.
Yuz di fɔmula:
Pi = P a / Ao = 150 120 / 20 = 900 kg/cm^2.
In dis kes, di injεkshכn prεshכn go bi 900 kg/cm^2.
Injɛkshɔn Volyum ɛn Weyt Kɔlkyulɛshɔn .
Injekshɔn volyum ɛn wet na tu impɔtant paramita dɛn na di injɛkshɔn moldin prɔses. Dɛn kin inflɔws di sayz, kwaliti, ɛn kɔst fɔ di pat dɛn we dɛn dɔn mol dairekt wan, ɛn dis kin mek dɛn kɔrɛkt kɔlkyulɛshɔn impɔtant fɔ mek di prɔses fayn.
Difinishɔn ɛn impɔtants fɔ injɛkshɔn volyum ɛn wet .
injεkshכn vכlyum de tכk bכt di amoun fכ di mכlt plastic mεtirial we dεn injεkt insay di mכld kכva insay εvri saykl. I de sho di sayz ɛn shep fɔ di las prɔdak.
Injɛkshɔn wet, na di ɔda say, na di mas fɔ di plastic matirial we dɛn injɛkt insay di mold kaviti. I de afɛkt di ɔl di wet ɛn di kɔst fɔ di pat we dɛn dɔn mol.
Akkuratli kɔlkul dɛn paramita ya impɔtant fɔ mek shɔ se dɛn gɛt kɔnsistɛns pat kwaliti, minimiz matirial west, ɛn optimiz prodakshɔn efyushɔn.
Injɛkshɔn volyum fɔmula .
Yu kin kɔl di injɛkshɔn volyum bay we yu yuz di fɔmula we de dɔŋ ya:
V = π (Do/2)^2 st
Usay:
Fɔ yuz dis fɔmula, yu go nid fɔ no di skru dayamita ɛn di injɛkshɔn strɔk fɔ di injɛkshɔn moldin mashin.
Injekshɔn wet fɔmula .
Yu kin kɔl di injɛkshɔn wet bay we yu yuz di fɔmula we de dɔŋ ya:
VW = V η Δ
Usay:
Fɔ yuz dis fɔmula, yu go nid fɔ no di injɛkshɔn volyum, di patikyula graviti fɔ di matirial we dɛn de yuz, ɛn di mɛkanikal efyushɔn fɔ di injɛkshɔn moldin mashin.
Factors we de afɛkt di injɛkshɔn volyum ɛn di wet .
Bɔku tin dɛn kin ambɔg di injɛkshɔn volyum ɛn di wet, lɛk:
Pat na di wɔl tik:
Di dizayn fɔ di wan dɛn we de rɔn:
Get saiz ɛn di say we dɛn de:
Ɛgzampul dɛn ɛn prɛktikal aplikeshɔn dɛn .
Lɛ wi tink bɔt wan ɛgzampul fɔ sho di prɛktikal aplikeshɔn fɔ di injɛkshɔn volyum ɛn di wet fɔmula dɛn. Lɛ wi se yu gɛt skru dayamita we na 4 cm, injɛkshɔn strɔk we na 10 cm, wan matirial we gɛt wan patikyula graviti we na 1.2, ɛn wan mɛkanikal efyushɔn we na 0.95.
Yuz di Injɛkshɔn Volyum Fɔmula:
V = π (do/2)^2 st = π (4/2)^2 10 = 62,83 cm^3.
Yuz di injɛkshɔn wet fɔmula:
VW = V η Δ = 62,83 1.2 0,95 = 71,63 g.
in dis kes, di injεkshכn vכlyum go bi 62.83 cm^3, εn di injεkshכn wet go bi 71.63 g.
Injɛkshɔn spid ɛn rit kɔlkyulɛshɔn .
Injɛkshɔn spid ɛn rit na tu impɔtant paramita dɛn na di injɛkshɔn moldin prɔses. Dɛn kin rili ambɔg di kwaliti fɔ di pat dɛn we dɛn dɔn mol, di tɛm we dɛn kin yuz fɔ saykl, ɛn di ɔl di prodakshɔn efyushɔn.
Difinishɔn ɛn impɔtants fɔ injɛkshɔn spid ɛn ret .
injεkshכn spid de tכk bכt di vεlositi we dεn de injεkt di mכlt plastic mεtirial insay di mold kכva. i tipikli mכsu in sεntimita pan sεkכnd (cm/sek).
Injεkshכn rεt, na di כda say, na di mas כf plastic mεtirial we dεn injεkt insay di mכld kכva pan wan yunit tεm, we dεn kin εksprεs insay gram pan sεkכnd (g/sek).
Optimizing dis paramita na impɔtant tin fɔ mek shɔ se dɛn fulɔp di mold cavity fayn fayn wan, minimiz difɛkt dɛn lɛk shɔt shot ɔ flash, ɛn ajɔst kɔnsistɛns pat kwaliti.
Fɔmula fɔ injɛkshɔn spid .
Yu kin kɔl di injɛkshɔn spid bay we yu yuz di fɔmula we de dɔŋ ya:
S = q / a wan wan wan wan wan wan wan wan wan wan wan wan wan wan wan wan
Usay:
Fɔ yuz dis fɔmula, yu go nid fɔ no di pɔmp autput ɛn di ifɛktiv eria fɔ di injɛkshɔn silinda.
Injekshɔn ret fɔmula .
Yu kin kɔl di injɛkshɔn rit bay we yu yuz di fɔmula we de dɔŋ ya:
SV = S * AO
Usay:
SV: Injekshɔn ret (g/sek) .
S: injekshɔn spid (cm/sek)
AO: Skru kros-sekshɔnal eria (cm^2)
Fɔ yuz dis fɔmula, yu go nid fɔ no di injɛkshɔn spid ɛn di krɔs-sɛkshɔn eria na di skru.
Factors we de afɛkt injɛkshɔn spid ɛn ret .
Bɔku tin dɛn kin ambɔg di injɛkshɔn spid ɛn di rit, we inklud:
Di prɔpati dɛn we dɛn gɛt:
Get saiz ɛn dizayn:
Pat Jɔyometri:
Ɛgzampul dɛn ɛn prɛktikal aplikeshɔn dɛn .
Lɛ wi tink bɔt wan ɛgzampul fɔ sho di prɛktikal aplikeshɔn fɔ di injɛkshɔn spid ɛn di ret fɔmula dɛn. Sɔmtɛm yu gɛt pɔmp autput we na 150 cc/sek, wan injɛkshɔn silinda ifɛktiv eria we na 50 cm^2, ɛn wan skru krɔs-sɛkshɔn eria we na 10 cm^2.
Yuz di injɛkshɔn spid fɔmula:
S = Q / A = 150 / 50 = 3 cm/sek
Yuz di injɛkshɔn ret fɔmula:
SV = S ao = 3 10 = 30 g/sek
insay dis kes, di injεkshכn spid go bi 3 cm/sek, εn di injεkshכn rεt go bi 30 g/sek.
Injekshɔn silinda eria kɔlkyulɛshɔn .
Injɛkshɔn silinda eria na wan impɔtant paramita na di injɛkshɔn moldin prɔses. I de afɛkt di injɛkshɔn prɛshɔn, spid, ɛn ɔl di pefɔmɛns fɔ di mashin dairekt wan.
Difinishɔn ɛn impɔtants fɔ injɛkshɔn silinda eria .
Di injekshɔn silinda eria de tɔk bɔt di krɔs-sɛkshɔn eria na di injɛkshɔn silinda bor. Na di eria we di plɔnja ɔ skru kin push di molten plastic matirial tru di tɛm we dɛn de injekt am.
di injεkshכn silinda εria de sho di amount fכs we dεn kin aplay to di mכlt plastic, we in tכn de afekt di injεkshכn prεshכn εn spid. Fɔ kɔlkyul dis eria kɔrɛkt wan na impɔtant tin fɔ mek di mashin wok fayn ɛn mek shɔ se di pat kwaliti we de kɔntinyu fɔ wok fayn.
Injekshɔn silinda eria fɔmula .
Yu kin kɔl di injɛkshɔn silinda eria bay we yu yuz di fɔmula dɛn we de dɔŋ ya:
Silind we nɔ gɛt wan pɔsin:
(Injekshɔn silinda dayamita^2 - plɔnja dayamita^2) * 0.785 = injɛkshɔn silinda eria (cm^2)
Dabl silinda:
(Injekshɔn silinda dayamita^2 - plɔnja dayamita^2) 0.785 2 = injɛkshɔn silinda eria (cm^2)
Fɔ yuz dɛn fɔmula ya, yu go nid fɔ no di dayamita dɛn fɔ di injɛkshɔn silinda ɛn plɔnja.
Factors we de afɛkt injɛkshɔn silinda eria .
Bɔku tin dɛn kin ambɔg di say we dɛn kin put injɛkshɔn silinda, lɛk:
Mashin Tayp ɛn Sayz:
Injɛkshɔn Yunit Kɔnfigyushɔn:
Plɔnja ɔ skru dizayn:
Ɛgzampul dɛn ɛn prɛktikal aplikeshɔn dɛn .
Lɛ wi tink bɔt wan ɛgzampul fɔ sho di prɛktikal aplikeshɔn fɔ di injɛkshɔn silinda eria fɔmula dɛn. Lɛ wi se yu gɛt wan singl-silinda injɛkshɔn moldin mashin wit injɛkshɔn silinda dayamita we na 10 cm ɛn wan plɔnja dayamita we na 8 cm.
Yuz di singl-silinda fɔmula:
Injekshɔn silinda eria = (injɛkshɔn silinda dayamita^2 - plɔnja dayamita^2) 0.785 = (10^2 - 8^2) 0.785 = (100 - 64) * 0.785 = 28.26 cm^2
In dis kes, di injεkshכn silinda εria go bi 28.26 cm^2.
Pɔmp Singl Rivɔlɔshɔn Volyum Kɔlkyulɛshɔn .
Pɔmp singl rivɔlɔshɔn volyum na wan impɔtant paramita insay di injɛkshɔn moldin prɔses. I de ditarmin di amount of molten plastic matiryal we di injekshɔn yunit deliv pan ɛni rivɔlɔshɔn fɔ di pɔmp.
Difinishɔn ɛn Impɔtants fɔ Pɔmp Singl Rivɔlɔshɔn Volyum .
Pɔmp Singl Rivɔlɔshɔn Volyum de tɔk bɔt di volyum fɔ molten plastic matirial we di injɛkshɔn yunit in pɔmp we dɛn dɔn pul insay wan kɔmplit rivɔlɔshɔn we dɛn dɔn pul kɔmɔt na dɛn os. I tipikli mεzj in kubik sεntimita pan sεkכnd (CC/SEC).
Dis paramita de afɛkt di injɛkshɔn spid, prɛshɔn, ɛn ɔvala efyushɔn fɔ di injɛkshɔn moldin prɔses dairekt wan. Kɔrɛkt wan fɔ kɔl di pɔmp singl rivɔlɔshɔn volyum na impɔtant tin fɔ optimiz mashin pefɔmɛns ɛn mek shɔ se kɔnsistɛns pat kwaliti.
Pɔmp singl rivɔlɔshɔn volyum fɔmula .
Di pɔmp singl rivɔlɔshɔn volyum kin kɔl bay we yu yuz di fɔmula we de dɔŋ ya:
Injekshɔn silinda eria (cm^2) injɛkshɔn spid (cm/sek) 60 sɛkɔn / moto spid = pɔmp singl rivɔlɔshɔn volyum (CC/SEC)
Fɔ yuz dis fɔmula, yu go nid fɔ no di injɛkshɔn silinda eria, injɛkshɔn spid, ɛn motoka spid fɔ di injɛkshɔn moldin mashin.
Factors we de afɛkt di pɔmp singl rivɔlɔshɔn volyum .
Bɔku tin dɛn kin ambɔg di pɔmp singl rivɔlɔshɔn volyum, we inklud:
Dimenshon dem weh dey di injekshon fo injekshon:
Di sɛtin dɛn fɔ injɛkshɔn:
Moto spid:
Ɛgzampul dɛn ɛn prɛktikal aplikeshɔn dɛn .
Lɛ wi tink bɔt wan ɛgzampul fɔ sho di prɛktikal aplikeshɔn fɔ di pɔmp singl rivɔlɔshɔn volyum fɔmula. Lɛ wi se yu gɛt injɛkshɔn moldin mashin wit injɛkshɔn silinda eria we na 50 cm^2, injɛkshɔn spid we na 10 cm/sek, ɛn motoka spid we na 1000 rpm.
Yuz di fɔmula:
Pɔmp singl rivɔlɔshɔn volyum = injɛkshɔn silinda eria injɛkshɔn spid 60 sɛkɔn / moto spid = 50 10 60 / 1000 = 30 cc/sek
In dis kes, di pɔmp singl rivɔlɔshɔn volyum go bi 30 cc/sek.
Tɔtɔl injɛkshɔn prɛshɔn kɔlkyulɛshɔn .
Tɔtɔl injɛkshɔn prɛshɔn na wan impɔtant paramita na di injɛkshɔn moldin prɔses. i de riprizent di maksimal fכs we dεn put pan di molten plastic mεtirial di tεm we di injεkshכn fεs de.
Difinishɔn ɛn impɔtants fɔ di tɔtal injɛkshɔn prɛshɔn .
Tכtal injεkshכn prεshכn de rεfεr to di sכm כf di fכs dεm we de akt pan di mכlt plastic mεtirial as dεn injεkt am insay di mכld kכva. Na wan kɔmbaynshɔn fɔ di prɛshɔn we di injɛkshɔn yunit de mek ɛn di rɛsistɛns we di matirial dɔn mit as i de flɔ tru di mol.
Fɔ kɔl di ɔl injɛkshɔn prɛshɔn kɔrɛkt wan na impɔtant tin fɔ mek shɔ se di mold kaviti fulɔp fayn fayn wan, fɔ mek di matirial nɔ pwɛl, ɛn fɔ mek di ɔl injɛkshɔn moldin prɔses fayn.
Total injekshɔn prɛshɔn fɔmula .
Yu kin kɔl di ɔl injɛkshɔn prɛshɔn bay we yu yuz di fɔmula dɛn we de dɔŋ ya:
(1) Maksimal sistem prɛshɔn (kg/cm^2) * Injɛkshɔn silinda eria (cm^2) = Tɔtɔl injɛkshɔn prɛshɔn (kg)
(2) Injɛkshɔn prɛshɔn (kg/cm^2) * Skru eria (cm^2) = Tɔtɔl injɛkshɔn prɛshɔn (kg)
Fɔ yuz dɛn fɔmula ya, yu go nid fɔ no di maksimal sistɛm prɛshɔn, injɛkshɔn silinda eria, injɛkshɔn prɛshɔn, ɛn skru eria fɔ di injɛkshɔn moldin mashin.
Factors we de afɛkt di tɔtal injɛkshɔn prɛshɔn .
Bɔku tin dɛn kin ambɔg di tɔtal injɛkshɔn prɛshɔn, we inklud:
Di prɔpati dɛn we dɛn gɛt:
Mold dizayn: .
Mashin kwaliti dɛn:
Ɛgzampul dɛn ɛn prɛktikal aplikeshɔn dɛn .
Lɛ wi tink bɔt wan ɛgzampul fɔ sho di prɛktikal aplikeshɔn fɔ di tɔtal injɛkshɔn prɛshɔn fɔmula dɛn. Sɔmtɛm yu gɛt injɛkshɔn moldin mashin wit maksimal sistɛm prɛshɔn we na 2000 kg/cm^2, injɛkshɔn silinda eria we na 50 cm^2, ɛn wan skru eria we na 10 cm^2. Di injekshɔn prɛshɔn de sɛt na 1500 kg/cm^2.
Yuz Fɔmula (1):
Total injekshɔn prɛshɔn = maksimal sistɛm prɛshɔn injɛkshɔn silinda eria = 2000 50 = 100,000 kg
Yuz Fɔmula (2):
Total injekshɔn prɛshɔn = injɛkshɔn prɛshɔn skru eria = 1500 10 = 15,000 kg
In dis kes, di totכl injεkshכn prεshכn go bi 100,000 kg yuz fכmula (1) εn 15,000 kg yuz fכmula (2).
Skru spid ɛn haydrolik moto singl rivɔlɔshɔn volyum kɔlkyulɛshɔn
Skru spid ɛn haydrolik moto singl rivɔlɔshɔn volyum na tu impɔtant paramita dɛn na di injɛkshɔn moldin prɔses. Dɛn de ple wan impɔtant pat fɔ no di plasticizing kapasiti ɛn di ɔvala efyushɔn fɔ di injɛkshɔn yunit.
Difinishɔn ɛn impɔtants fɔ skru spid ɛn haydrolik moto singl rivɔlɔshɔn volyum
Skru spid de rifer to di rotashɔnal velositi fɔ di skru na di injɛkshɔn yunit, we dɛn kin mɛzhɔ insay rivɔlɔshɔn dɛn fɔ wan minit (RPM). I de afɛkt di shia rit, miks, ɛn mɛlt di plastic matirial dairekt wan.
Haydrolik moto singl rivɔlɔshɔn volyum, na di ɔda say, na di amɔnt ɔf fluid we di haydrolik moto displeys insay wan kɔmplit rivɔlɔshɔn. I tipikli mεzj in kubik sεntimita pan wan rivכlyushכn (CC/REV).
Dis paramita dεm na klos rilayt εn ple wan signifyant rol fכ kכntrכl di plasticizing prכsεs, mek sכh se kכnsistεnt mεtirial prεparashכn, εn optimiz di injεkshכn moldin saykl.
Skru spid ɛn haydrolik moto singl rivɔlɔshɔn volyum fɔmula .
Di rilayshɔn bitwin skru spid ɛn haydrolik moto singl rivɔlɔshɔn volyum kin ɛksprɛs yuz di fɔmula dɛn we de dɔŋ ya:
(1) Pɔmp singl rivɔlɔshɔn volyum (CC/REV) * Mɔta spid (RPM) / Haydrolik Mɔtɔ Singl Rivɔlɔshɔn Volyum = Skru Spid
(2) Pɔmp singl rivɔlɔshɔn volyum (CC/REV) * Mɔta spid (RPM) / Skru Spid = Haydrolik Mɔtɔ Singl Rivɔlɔshɔn Volyum
Fɔ yuz dɛn fɔmula ya, yu go nid fɔ no di pɔmp singl rivɔlɔshɔn volyum, moto spid, ɛn ɔ di skru spid ɔ haydrolik moto singl rivɔlɔshɔn volyum.
Factors we de afɛkt skru spid ɛn haydrolik moto singl rivɔlɔshɔn volyum
Bɔku tin dɛn kin ambɔg di skru spid ɛn di haydrolik moto singl rivɔlɔshɔn volyum, we inklud:
Di prɔpati dɛn we dɛn gɛt:
Skru Dizayn:
KƆMPRƐSHƆN RƐSHƆN .
L/D ratio fɔ di .
Miks Ɛlimɛnt dɛn .
Injɛkshɔn yunit spɛsifikɛshɔn dɛn:
Pump Kapasiti .
Moto pawa ɛn tɔk .
Ɛgzampul dɛn ɛn prɛktikal aplikeshɔn dɛn .
Lɛ wi tink bɔt wan ɛgzampul fɔ sho di prɛktikal aplikeshɔn fɔ di skru spid ɛn di haydrolik moto singl rivɔlɔshɔn volyum fɔmula dɛn. Lɛ wi se yu gɛt injɛkshɔn moldin mashin wit pɔmp singl rivɔlɔshɔn volyum we na 100 cc/rev, wan moto spid we na 1500 rpm, ɛn wan haydrolik moto singl rivɔlɔshɔn volyum we na 250 cc/rev.
Yuz fɔmula (1) fɔ kɔl di skru spid:
Skru Spid = Pam Singl Rivɔlɔshɔn Volyum Mɔta Spid / Haydrolik Mɔtɔ Singl Rivɔlɔshɔn Volyum = 100 1500 / 250 = 600 rpm
Yuz fɔmula (2) fɔ kɔl di haydrolik moto singl rivɔlɔshɔn volyum:
Haydrolik moto singl rivɔlɔshɔn volyum = pɔmp singl rivɔlɔshɔn volyum moto spid / skru spid = 100 1500 / 600 = 250 cc/rev
In dis kes, di skru spid go bi 600 rpm, ɛn di haydrolik moto singl rivɔlɔshɔn volyum go bi 250 cc/rev.
Empirical fomula fɔ klamp fɔs .
Empirikal fɔmula fɔ klamp fɔs na simpul we fɔ ɛstimat di klamp fɔs we dɛn nid fɔ injɛkshɔn moldin. Dɛn fɔmula ya de gi wan kwik ɛn prɛktikal we fɔ no di rayt mashin saiz fɔ wan givɛn moldin projɛkt.
Difinishɔn ɛn impɔtants fɔ ɛmpirikal fɔmula fɔ klamp fɔs .
Empirikal fɔmula fɔ klamp fɔs kɔmɔt frɔm prɛktikal ɛkspiriɛns ɛn ɔbshɔbishɔn insay injɛkshɔn moldin. Dɛn kin tek tɛm tink bɔt di men tin dɛn lɛk di say we dɛn projɛkt di prɔdak, di prɔpati dɛn we dɛn gɛt, ɛn di say dɛn we dɛn fɔ sef.
Dɛn fɔmula ya impɔtant fɔ sɔm rizin dɛn:
Dɛn de alaw fɔ mek dɛn ebul fɔ ɛstimat kwik kwik wan di klamp fɔs rikwaymɛnt dɛn .
Dɛn kin ɛp fɔ pik di rayt injɛkshɔn moldin mashin .
Dɛn de mek shɔ se dɛn gɛt fayn klamp fɔs fɔ mek di mold nɔ opin ɛn flash fɔmɛshɔn .
Wail empirical formulas de gi gud statin point, e impɔtant fɔ no se dɛn kin nɔ tink bɔt ɔl di kɔmplisiti dɛm fɔ wan patikyula moldin aplikeshɔn.
Empirical fomula 1 fɔ klamp fɔs .
Di fɔs empirikal fɔmula fɔ klamp fɔs na bays pan di klamp fɔs kɔnstant (KP) ɛn di projɛkt eria fɔ di prɔdak (S):
Clamping Force (T) = Klamp Fos Kɔnstant KP Prodakt Projɛkt Ɛria S (cm^2) Sefty faktɔ (1+10%)
Insay dis fɔmula:
KP na kɔnstant we dipen pan di matirial we dɛn de mol (tipikli de frɔm 0.3 to 0.8)
S na di projɛkt eria fɔ di prɔdak insay cm^2.
Di sefty factor of 1.1 (1+10%) akכnt fכ vεryushכn in mεtirial prכpati εn prכsεsin kכndishכn dεm .
Dis fɔmula de gi wan kwik we fɔ ɛstimat di klamp fɔs we dɛn nid bay di prɔdak jɔyometri ɛn matirial.
Empirical fomula 2 fɔ klamp fɔs .
Di sɛkɔn empirikal fɔmula fɔ klamp fɔs na bays pan di matirial moldin prɛshɔn ɛn di projɛkt eria fɔ di prɔdak:
Clamping Force (T) = Material Molding Prɛshɔn Prodakt Projɛkt Projɛkt Ɛria S (cm^2) Sefty faktɔ (1+10%) = 350bar s (cm^2) / 1000 (1+10%)
Insay dis fɔmula:
Di matirial moldin prɛshɔn dɛn kin tek am se na 350 bar (wan tipik valyu fɔ bɔku plastic dɛn)
S na di projɛkt eria fɔ di prɔdak insay cm^2.
Di sefty factor we na 1.1 (1+10%) de aplay fɔ akɔn fɔ difrɛns dɛn .
Dis fɔmula na patikyula yusful we di spɛshal matirial prɔpati dɛn nɔ no, as i de dipen pan wan standad moldin prɛshɔn valyu.
Ɛgzampul dɛn ɛn prɛktikal aplikeshɔn dɛn .
Lɛ wi tink bɔt wan ɛgzampul fɔ sho di prɛktikal aplikeshɔn fɔ di ɛmpirikal fɔmula fɔ klamp fɔs. Lɛ wi se yu gɛt prɔdak wit wan prɔjɛkt eria we na 500 cm^2, ɛn yu de yuz ABS plastic (kp = 0.6).
Yuz Empirikal Fɔmula 1:
Fos we de klamp (T) = kp S (1+10%) = 0,6 500 1,1 = 330 t
Yuz Empirikal Fɔmula 2:
Fos we de klamp (T) = 350 s / 1000 (1+10%) = 350 500 / 1000 1,1 = 192,5 T
In dis kes, empirikal fomula 1 sכgεst wan klamp fכs fכ 330 T, we di empirikal fכmula 2 sכgεst wan klamp fכs fכ 192.5 t.
Plasticizing Kapasiti Kalkyuleshɔn .
Insay injɛkshɔn moldin, plasticizing kapasiti de ple wan impɔtant pat fɔ no di efyushɔn ɛn kwaliti fɔ di prɔses. Lɛ wi fɛn dis kɔnsɛpt mɔ ɛn lan aw fɔ kɔl am.
Ɔndastand Plastizin Kapasiti .
Plasticizing kapasiti de rifer to di amount of plastic material we kin melt ɛn homogenize bay di injekshɔn moldin mashin in skru ɛn barɛl sistem insay wan givɛn tɛm piɔyud. i tipikli εksprεs in gram pan sεkכnd (g/sek).
Di signifyans fɔ plasticizing kapasiti de insay in dairekt impak pan:
Prodakshɔn ret .
Matirial Kɔnsistɛns .
Pat Kwaliti .
If yu nɔ gɛt bɔku plasticizing kapasiti, dat kin mek di saykl tɛm dɛn lɔng, dɛn nɔ kin miks fayn, ɛn dɛn nɔ kin gri fɔ tek pat prɔpati dɛn. Na di ɔda say, pasmak plasticizing kapasiti kin rilizɔt in matirial dɛgradishɔn ɛn inkris ɛnaji kɔnsɔmshɔn.
Aw fɔ kɔl plasticizing kapasiti?
Yu kin kɔl di plasticizing kapasiti fɔ wan injɛkshɔn moldin mashin bay we yu yuz di fɔmula we de dɔŋ ya:
W(g/sek) = 2,5 × (d/2,54)^2 × (h/2,54) × N × × 1000 / 3600 / 2.
Usay:
W: Plasticizing Kapasiti (g/sek) .
D: Skru dayamita (cm) .
H: Skru chanɛl dip na di frɔnt ɛnd (cm) .
N: Skru rotashɔnal spid (RPM) .
S: Raw matirial density .
Fɔ yuz dis fɔmula, yu go nid fɔ no di skru jɔyometri (dayamita ɛn chanɛl dip), di skru spid, ɛn di density fɔ di plastic matirial we dɛn de prosɛs.
Lɛ wi tink bɔt wan ɛgzampul fɔ sho di kɔlkyulɛshɔn prɔses. Lɛ wi se yu gɛt injɛkshɔn moldin mashin wit di spɛsifikɛshɔn dɛn we de dɔŋ ya:
Skru dayamita (d): 6 cm
Skru chanɛl dip na di frɔnt ɛnd (h): 0.8 cm
Skru rotashɔnal spid (N): 120 rpm .
Raw matirial density (s): 1.05 g/cm^3.
Plug dɛn valyu ya insay di fɔmula:
W = 2,5 × (6/2,54)^2 × (0,8/2,54) × 120 × 1,05 × 1000 / 3600 / 2.
W = 2,5 × 5,57 × 0,31 × 120 × 1,05 × 0,139
W = 7,59 g/sek
Insay dis ɛgzampul, di plasticizing kapasiti fɔ di injɛkshɔn moldin mashin na lɛk 7.59 gram pan sɛkɔn.
Praktikal aplikeshɔn ɛn tin dɛn fɔ tink bɔt .
We dɛn de yuz di kɔlkyulɛshɔn fɔmula fɔ injɛkshɔn moldin insay rial-wɔl sɛnɛriɔ, dɛn fɔ tek sɔm tin dɛn na kɔna fɔ mek shɔ se dɛn gɛt di bɛst rizɔlt. Lɛ wi fɛn ɔl dɛn tin ya we wi fɔ tink bɔt ɛn si aw dɛn de inflɔws di sɛlɛkshɔn fɔ injɛkshɔn moldin mashin dɛn fɔ sɔm patikyula prɔdak dɛn.
Factors fɔ tink bɔt .
Fɔ ajɔst di pat kwaliti ɛn prodakshɔn efyushɔn we yu want, i rili impɔtant fɔ tink bɔt di men tin dɛn we de dɔŋ ya:
Fos we de klamp:
Di prɛshɔn fɔ injɛkshɔn:
Afekt di filin spid ɛn pak di mold kaviti .
Impɛkt dɛn pat dɛnsiti, sɔfays finish, ɛn dimɛnshɔnal stebiliti .
Injɛkshɔn Volyum: .
Injɛkshɔn spid:
Afɛkt di filin patɛn, shia rit, ɛn matirial flɔ bihayvya .
Influɛns di pat in apinɛns, mɛkanikal prɔpati, ɛn saykl tɛm .
Bay we dɛn tek tɛm analayz dɛn tin ya ɛn yuz di rayt kɔlkyulɛshɔn fɔmula dɛn, injɛkshɔn moldin pɔshɔnal dɛn kin ɔptimayz di prɔses paramita dɛn ɛn pik di mashin we fit pas ɔl fɔ wan givɛn aplikeshɔn.
Matching Machine Specifications to di Prodakt Rikwaymɛnt dɛn .
Fɔ sho aw i impɔtant fɔ mek dɛn yuz mashin spɛsifikɛshɔn dɛn fɔ mek di prɔdak dɛn we dɛn nid, lɛ wi tink bɔt sɔm kes stɔdi dɛn:
Kes Stɔdi 1: Ɔtomotiv Intɛriɔ Kɔmpɔnɛnt .
Material: ABS
Dimenshon dem: 250 x 150 x 50 mm
Di tik we di wɔl tik: 2.5 mm
Di tin dɛn we dɛn nid fɔ du fɔ klamp: 150 tan dɛn
Injekshɔn volyum: 150 cm^3.
Insay dis kes, wan injɛkshɔn moldin mashin wit klamp fɔs we at le 150 tan ɛn injɛkshɔn volyum kapasiti we na 150 cm^3 ɔ mɔ go fayn. Di mashin fɔ gɛt di kapasiti bak fɔ mek dɛn kɔntinyu fɔ gɛt di injɛkshɔn prɛshɔn ɛn spid we dɛn nid fɔ di ABS matirial.
Kes Stɔdi 2: Mɛdikal divays kɔmpɔnɛnt .
Di tin dɛn we dɛn yuz: PC
Dimenshon dem: 50 x 30 x 10 mm
Di tik we di wɔl tik: 1.2 mm
Di tin dɛn we dɛn nid fɔ du fɔ klamp: 30 tan dɛn
Injekshɔn volyum: 10 cm^3.
Fɔ dis mɛdikal divays kɔmpɔnɛnt, wan smɔl injɛkshɔn moldin mashin wit klamp fɔs we de arawnd 30 tan ɛn injɛkshɔn volyum kapasiti we na 10 cm^3 go fayn. Di mashin fɔ gɛt prɛsis kɔntrol oba di injɛkshɔn prɛshɔn ɛn spid fɔ mek shɔ se di dimɛnshɔnal akkuracy ɛn di sɔfa kwaliti we dɛn nid fɔ di mɛdikal aplikeshɔn dɛn.
| Kes Stɔdi | Matirial | Pat Dimɛnshɔn (mm) | Wɔl tik (mm) | we dɛn nid fɔ klamp fɔs (Tɔn) | injɛkshɔn volyum (cm^3) |
| 1 | ABS na ABS | 250 x 150 x 50 | 2.5 | 150 | 150 |
| 2 | PC . | 50 x 30 x 10 | 1.2 | 30 | 10 |
Dɔn
Insay dis atikul, wi bin fɛn ɔl di impɔtant injɛkshɔn moldin fɔmula dɛn. Di kɔrɛkt kɔlkyulɛshɔn fɔ klamp fɔs, injɛkshɔn prɛshɔn, ɛn spid rili impɔtant. Dɛn fɔmula dɛn ya de mek shɔ se dɛn ebul fɔ wok fayn ɛn dɛn gɛt kwaliti fɔ di prɔdak.
Yuz prɛsis fɔmula dɛn de ɛp fɔ mek yu injɛkshɔn moldin prɔses fayn. Di kɔrɛkt kɔlkyulɛshɔn dɛn de mek dɛn nɔ gɛt difrɛn difrɛn tin dɛn we nɔ fayn ɛn dɛn de mek di prodakshɔn wok fayn fayn wan.
Ɔltɛm yu fɔ yuz dɛn fɔmula ya fayn fayn wan. We yu du dat, yu go ebul fɔ gɛt bɛtɛ rizɔlt na yu injɛkshɔn moldin prɔjek dɛm.
