Pikiri dilanni nafa ka bon kosɛbɛ bi fɛn dilanni na, k’a ta mobili yɔrɔw la ka taa a bila don o don plastiki fɛnw na. Jatebla tigitigiw bɛ nin wale in kɛ ka ɲɛ, ka baarakɛcogo ɲuman ni jogo ɲuman sabati. Nin sɛbɛn in kɔnɔ, aw bɛna formula nafamaw dege walasa ka fanga siri, pikiri tansiyɔn, ani fɛn wɛrɛw, walasa ka aw ka pikiri kɛcogo ɲɛ.
Pikirili Molidali .
Pikiriw dilanni ye wale gɛlɛn ye min bɛ tali kɛ masinw yɔrɔ suguya caman ni taabolo paramɛtiriw ka ɲɔgɔnfaamu gɛlɛn na. Walasa ka nin fɛn dilanni fɛɛrɛ in jɔnjɔnw faamuya, a nafa ka bon kosɛbɛ ka fɛn kolomaw faamuya minnu bɛ o ko la.
pikirijikɛlanw ka baarakɛminɛnw ani u baarakɛcogo .
pikirijikɛlan dɔ kɔnɔfɛn fɔlɔw ye :
Pikiri yɔrɔ: A bɛ kɛ ka plastiki fɛn wuli ani ka a pikiri kɛ nɔgɔbɔlan kɔnɔ.
CLAMPING UNIT: A bɛ nɔgɔ minɛ pikiri kɛtuma na ani ka sirili fanga wajibiyalen kɛ walasa ka nɔgɔ bali ka da degun na.
Mold: A bɛ kɛ tilayɔrɔ fila ye (dawolo ni a kɔnɔna) minnu bɛ kɛ fɛn laban cogoya ye.
Kunnafoni-falen-falen-minɛn: A bɛ pikiri kɛcogo bɛɛ labɛn ani k’a kɔlɔsi, ka bɛnkan ni jogo ɲuman sabati.
O yɔrɔ kelen-kelen bɛɛ jɔyɔrɔ ka bon kosɛbɛ masin ka baara kɛcogo ɲuman na, wa a bɛ nɔ bila yɔrɔ mɔlenw ka jogo ɲuman na.
Paramɛtiri jɔnjɔnw pikiri kɛli la .
Walasa ka ɲɛtaa ɲuman sɔrɔ, a nafa ka bon ka nin paramɛtiri jɔnjɔnw faamuya ani k’u kɔlɔsi:
Kɔlɔn fanga: Fanga min ka kan ka kɛ walasa ka nɔgɔ datugu pikiri kɛtuma na, ka fɛn bali ka bɔ a la ani ka a yɔrɔ ɲuman sabati.
Pikiri tansiyɔn : tansiyɔn min bɛ kɛ plastiki wulilen na i n’a fɔ a pikirila nɔgɔbɔlan kɔnɔ, o bɛ nɔ bila fasa teliya ni a yɔrɔ ɲuman na.
Pikiri hakɛ : plastiki fɛn hakɛ min bɛ don nɔgɔbɔlan kɔnɔ sɛgɛsɛgɛli kelen-kelen bɛɛ la, o bɛ fura laban hakɛ ni a girinya hakɛ ni a girinya hakɛ dɔn.
Paramɛtɛrɛ nafama wɛrɛw ye pikiri teliya, funteni, nɛnɛ waati ani bɔli fanga ye. O ko kelen-kelen bɛɛ ka kan ka kɔlɔsi kosɛbɛ ani ka ladilan walasa ka yɔrɔw lajɛ minnu bɛ bɛn ɲɔgɔn ma, minnu ka ɲi.
Jɛɲɔgɔnya min bɛ masinw ka fɛnsɛbɛnniw ni fɛn dilanni wajibiyalenw cɛ .
Pikiri dilanni masin sugandili bɛ bɔ molding poroze ka wajibi kɛrɛnkɛrɛnnenw na. Fɛn minnu ka kan ka jateminɛ, olu filɛ nin ye:
Ja hakɛ: Plastiki hakɛ min bɛ se ka don a la, o bɛ se ka pikiri kɛ cycle kelen kɔnɔ.
K’a siri fanga la: Masina ka se ka nɔgɔ datugu ni pikirijikɛlan ye min wajibiyalen don.
Pikiri tansiyɔn : o ye degunba ye masin bɛ se ka min sɔrɔ walasa ka nɔgɔbɔlan fa.
| Molding Requirement | Related Machine Specification . |
| A ka bon . | shot size . |
| part complexité . | Fanga min bɛ kɛ ka mɔgɔw minɛ, o bɛ kɛ ka pikiri kɛ . |
| Material suguya . | Pikiri tansiyɔn, funteni funteni . |
Clamping force jatebɔ .
Pikiriw dilanni diɲɛ kɔnɔ, fanga min bɛ wele ko clamping, o jɔyɔrɔ ka bon kosɛbɛ walasa ka fura laban ɲuman ni a kɛcogo ɲuman sabati. Nka mun tigitigi de bɛ fanga siri, ani mun na a nafa ka bon kosɛbɛ?
fanga min bɛ mɔgɔ la, o ɲɛfɔli ni a nafa .
fanga min bɛ kɛ ka fɛn dɔ siri, o bɛ fanga jira min ka kan ka kɛ walasa ka nɔgɔ datugu pikiri kɛtuma na. A bɛ mɔli bali ka da plastiki pikirilen degunba kɔrɔ, ka a lajɛ ko fɛn wulilen bɛ kɔnɔna fa pewu ani ka kɛ cogo ɲininen na.
Ni fanga bɛrɛ tɛ a la, ko dɔw i n’a fɔ flash, fa dafabaliya, ani dimension inaccuracies bɛ se ka kɛ, o bɛ na ni yɔrɔw tiɲɛnenw ye ani ka dɔ fara fɛn dilanni musakaw kan.
Formula de force de force clamping .
Clamping force min ka kan ka kɛ mouding poroze kɛrɛnkɛrɛnnen dɔ la, o bɛ se ka jate ni nin formula in ye:
F = AM * PV / 1000 .
Min:
F: Fanga min bɛ kɛ ka mɔgɔw minɛ (ton) .
AM: Cavité Projeté Area (cm^2)
PV: Fali tansiyɔn (kg/cm^2) .
Walasa ka baara kɛ ni nin formula in ye ka ɲɛ, aw bɛna a ɲini ka yɔrɔ jateminɛlen yɔrɔ dɔn ani ka fasa degun bɛnnen sɔrɔ fɛn min bɛ kɛ ka baara kɛ.
Fɛn minnu bɛ nɔ bila fanga la .
Fɛn caman bɛ se ka nɔ bila fanga wajibiyalen na, i n’a fɔ:
Fɛn minnu bɛ kɛ ni fɛnw ye:
Viscosité .
shrinkage rate .
Melt flow index .
Yɔrɔ jateminɛ:
Kogo ka bon .
Aspect ratio .
complexité .
Nin ko ninnu bɛ nɔ bila cogo min na, o faamuyali nafa ka bon kosɛbɛ walasa ka pikiri kɛcogo ɲɛ ani ka a yɛrɛ tanga fiɲɛw ma minnu bɛ kɛ tuma bɛɛ.
Misaliw ni baarakɛcogo ɲumanw .
An ka misali dɔ lajɛ walasa ka fanga-da-minɛn formula waleyali kɛcogo ɲuman jira. A ka c'a la, i bɛ yɔrɔ dɔ mɔ min kɔnɔna na, a janya bɛ se santimɛtɛrɛ 250 ma^2 ni fɛn ye min falen tansiyɔn bɛ fɔ ko a bɛ se ka kɛ kilo 180 ye.
Baara kɛ ni formula ye:
F = AM PV / 1000 = 250 180 / 1000 = tɔni 45 .
O cogo la, i tun bɛna mago don fanga la min bɛ se tɔni 45 ma walasa ka nɔgɔ dacogo ɲuman sɔrɔ ani ka a yɔrɔ cogoya ɲuman sɔrɔ.
Pikiri tansiyɔn jateminɛ .
Pikiri tansiyɔn ye paramɛtiri nafama wɛrɛ ye pikiri kɛcogo la. A bɛ nɔ bila yɔrɔw la minnu mɔlen don, wa a jatebɔcogo faamuyali nafa ka bon kosɛbɛ taabolo ɲuman na.
Pikiri tansiyɔn ɲɛfɔli ni a nafa .
Pikiri tansiyɔn bɛ fanga jira min bɛ kɛ plastiki wulilen na ni a pikirila nɔgɔbɔlan kɔnɔ. A b’a jira cogo min na fɛn in bɛ kɔnɔna fa teliya la ani cogo ɲuman na, ka a lajɛ ni a yɔrɔ bɛ se ka kɛ cogo bɛnnen na ani ka fiɲɛw dɔgɔya i n’a fɔ marifa surunw walima fasa dafabaliw.
Pikiri tansiyɔn ɲuman marali nafa ka bon kosɛbɛ walasa ka yɔrɔw sɔrɔ minnu bɛ bɛn ɲɔgɔn ma, minnu ka ɲi, ka sɔrɔ ka cycle waatiw ni fɛnw tiɲɛni dɔgɔya.
Pikiri tansiyɔn formula .
Pikiri tansiyɔn bɛ se ka jate ni nin formula in ye:
PI = P * A / AO .
Min:
PI: Pikiri tansiyɔn (kg/cm^2) .
P: Pompe tansiyɔn (kg/cm^2) .
A: Pikiri silinda yɔrɔ nafama (cm^2) .
AO: Vis cross-sectional (cm^2) .
Walasa ka nin formula in kɛ, aw bɛna a ɲini ka pɔnpe tansiyɔn dɔn, ka pikirijikɛlan yɔrɔ nafama dɔn, ani ka a yɔrɔ min bɛ kɛ ka a siri.
Fɛn minnu bɛ pikirijikɛlan degun .
Fɛn caman bɛ se ka nɔ bila pikiriji degun na min ka kan ka kɛ, i n’a fɔ:
Fɛn minnu bɛ kɛ ni fɛnw ye:
Gate bonya ani a dilanni:
Flow sira janya ni a janya:
Misaliw ni baarakɛcogo ɲumanw .
An ka misali dɔ jateminɛ walasa ka pikirijikɛlan tansiyɔn formula kɛcogo ɲuman jira. A ka kɛ ko pɔnpe tansiyɔn ye kilo 150 ye/cm^2, pikirijikɛlan min bɛ se ka kɛ santimɛtɛrɛ 120 ye^2, ani kurukuruw tigɛyɔrɔ ye santimɛtɛrɛ 20 ye^2.
Baara kɛ ni formula ye:
PI = p a / ao = 150 120 / 20 = 900 kg/cm^2 .
O cogo la, pikiri tansiyɔn tun bɛna kɛ kilogaramu 900 ye/cm^2.
Pikiri hakɛ ni girinya jateminɛ .
Pikiri hakɛ ni a girinya ye fɛn nafama fila ye pikiri kɛcogo la. U bɛ nɔ bila yɔrɔw la minnu mɔlen don, olu bonya, u cogoya ani u musakaw, o b’a to u ka jatebɔ tigitigi bɛ kɛ fɛn nafamaba ye walasa ka baara kɛcogo ɲuman sɔrɔ.
Pikiri hakɛ ni a girinya ɲɛfɔli ani u nafa .
Pikiri hakɛ bɛ tali kɛ plastiki fɛn wulilen hakɛ la min pikirila nɔgɔbɔlan kɔnɔ sɛgɛsɛgɛli kelen-kelen bɛɛ la. A bɛ fɛn laban hakɛ ni a cogoya latigɛ.
Pikiri girinya kɔni, o ye plastiki fɛn min pikirila nɔgɔbɔlan kɔnɔ, o girinya ye. A bɛ nɔ bila a yɔrɔ mɔlen girinya bɛɛ la ani a musaka la.
Nin paramɛtɛrɛ ninnu jateminɛni tigitigi nafa ka bon walasa ka yɔrɔ ɲumanw cogoya sabati, ka fɛnw tiɲɛni dɔgɔya, ani ka fɛn dilanni nafa ɲuman sɔrɔ.
Pikiri hakɛ formula .
Pikiri hakɛ bɛ se ka jate ni nin formula in ye:
v = π (do/2)^2 ST .
Min:
V: Pikiri hakɛ (cm^3) .
DO: Vis diamètre (cm) .
ST: Pikiri (CM) .
Walasa ka nin formula in kɛ, aw bɛna a ɲini ka a sirilan janya dɔn ani ka pikirijikɛlan pikiri kɛ.
Pikiri girinya formula .
Pikiri girinya bɛ se ka jate ni nin furakisɛ in ye:
vw = v η Δ .
Min:
Walasa ka baara kɛ ni nin formula in ye, aw bɛna a ɲini ka pikiri hakɛ dɔn, ka baara kɛ ni fɛn min ye, o girinya kɛrɛnkɛrɛnnen, ani pikiri kɛcogo masin ka baarakɛcogo ɲuman.
Fɛn minnu bɛ pikiri hakɛ ni girinya nɔ bila .
Fɛn caman bɛ se ka nɔ bila pikiri hakɛ ni a girinya la, i n’a fɔ:
Yɔrɔ kogo janya:
Runner System Design:
Gate hakɛ ani a sigiyɔrɔ:
Misaliw ni baarakɛcogo ɲumanw .
An ka misali dɔ lajɛ walasa ka pikiri hakɛ ni a girinya furakɛcogo kɛcogo ɲuman jira. A ka c’a la, i bɛ se ka santimɛtɛrɛ 4 sɔrɔ, o ye santimɛtɛrɛ 10 ye, fɛn min girinya kɛrɛnkɛrɛnnen ye 1,2 ye, ani a ka masina ka baarakɛcogo ɲuman ye 0,95 ye.
Aw bɛ baara kɛ ni pikiri hakɛ formula ye:
v = π (do/2)^2 ST = π (4/2)^2 10 = 62,83 cm^3
Ni aw bɛ baara kɛ ni pikirijikɛlan ye:
vw = v η Δ = 62,83 1.2 0,95 = 71,63 g .
O cogo la, pikiri hakɛ tun bɛ kɛ santimɛtɛrɛ 62,83 ye, ani pikiri girinya tun bɛ kɛ garamu 71,63 ye.
Pikiri teliya ni hakɛ jatebɔ .
Pikiri teliya ni a hakɛ ye fɛn fila ye minnu nafa ka bon pikiri kɛcogo la. U bɛ nɔba bila yɔrɔw la minnu dilannen don, cycle waatiw, ani fɛn dilanni bɛɛ lajɛlen nafa.
Pikiri teliya ni a hakɛ ɲɛfɔli ani a nafa .
Pikiri teliya bɛ tali kɛ teliya la min bɛ kɛ ni plastiki sɔgɔlen ye ka don nɔgɔbɔlan kɔnɔ. A ka c’a la, a bɛ suman santimɛtɛrɛ kɔnɔ segin kɔnɔ (CM/SEC).
Faan wɛrɛ fɛ, pikiri hakɛ ye plastiki ye min bɛ pikiri kɛ nɔgɔbɔlan kɔnɔ waati kelen kɔnɔ, a ka ca a la a bɛ fɔ garamu la segin kɔnɔ (G/SEC).
Nin paramɛtɛrɛ ninnu ɲɛnabɔli nafa ka bon walasa ka nɔgɔbɔlan facogo ɲuman sabati, ka fiɲɛw dɔgɔya i n’a fɔ ja surunw walima flash, ani ka yɔrɔ cogoya basigilen sɔrɔ.
Pikiri teliya formula .
Pikiri teliya bɛ se ka jate ni nin formula in ye:
s = q / a .
Min:
Walasa ka nin formula in kɛ, aw bɛna pɔnpe bɔli dɔn ani pikirijikɛlan yɔrɔ nafama.
Pikiri hakɛ formula .
Pikiri hakɛ bɛ se ka jate ni nin formula in ye:
sv = s * ao .
Min:
SV: Pikiri hakɛ (G/SEC) .
S: Pikiri teliya (CM/SEC) .
AO: Vis cross-sectional (cm^2) .
Walasa ka baara kɛ ni nin formula in ye, aw bɛna pikiri teliya dɔn ani ka a yɔrɔ dɔn min bɛ kɛ ka a siri.
Fɛn minnu bɛ pikiri teliya ni a hakɛ minɛ .
Fɛn caman bɛ se ka nɔ bila pikiri teliya ni a hakɛ la, i n’a fɔ:
Fɛn minnu bɛ kɛ ni fɛnw ye:
Gate bonya ani a dilanni:
Yɔrɔ jateminɛ:
Misaliw ni baarakɛcogo ɲumanw .
An ka misali dɔ jateminɛ walasa ka pikiri teliya ni hakɛ formulaw kɛcogo ɲuman jira. A ka c'a la, i bɛ pɔnpe bɔli sɔrɔ 150 cc/sec, pikiri silinda min bɛ se ka kɛ santimɛtɛrɛ 50 ye^2, ani jurukisɛ tigɛyɔrɔ ye santimɛtɛrɛ 10 ye^2.
Aw bɛ baara kɛ ni pikiri teliya formula ye:
S = q / a = 150 / 50 = 3 cm/sec .
Aw bɛ baara kɛ ni pikiri hakɛ formula ye:
SV = S AO = 3 10 = 30 g/sec .
O cogo la, pikiri teliya tun bɛna kɛ santimɛtɛrɛ 3/sec ye, wa pikiri hakɛ tun bɛ kɛ 30 g/sec ye.
Pikiri silinda yɔrɔ jatebɔ .
Pikiri silinda yɔrɔ ye paramɛtiri gɛlɛn ye pikiri kɛcogo la. A bɛ nɔ bila tigitigi pikirijikɛlan tansiyɔn na, a teliya la, ani a baara bɛɛ lajɛlen na.
Pikiri silinda yɔrɔ ɲɛfɔli ni a nafa .
Pikiri silinda yɔrɔ bɛ tali kɛ pikirijikɛlan ka kurukuruw yɔrɔ la. O ye yɔrɔ ye min bɛ kɛ ka plastiki sɔgɔlen bɛ gɛrɛntɛ ni pilon walima juru ye pikiri kɛtuma na.
Pikiri silinda yɔrɔ de bɛ fanga hakɛ min bɛ se ka kɛ plastiki wulilen na, o de bɛ a jira ko a bɛ nɔ bila pikiri tansiyɔn ni teliya la. Nin yɔrɔ in jatebɔcogo tigitigi nafa ka bon walasa ka masinw ka baara kɛcogo ɲɛ ani ka a yɔrɔ cogoya sabati.
Pikiri silinda yɔrɔ formula .
Pikiri silinda yɔrɔ bɛ se ka jate ni nin furakisɛ ninnu ye:
Silindri kelen:
(Injection silinda diamètre^2 - Plunger diamètre^2) * 0,785 = Pikiri silinda yɔrɔ (cm^2)
Silindri fila:
(Injection silinda diamètre^2 - Plunger diamètre^2) 0.785 2 = Pikiri silinda yɔrɔ (cm^2)
Walasa ka nin formula ninnu kɛ, aw bɛna a ɲini ka pikirijikɛlan silinda ni a sɔgɔlilanw cɛmancɛ dɔn.
Fɛn minnu bɛ pikiri kɛ silinda yɔrɔ la .
Fɛn caman bɛ se ka nɔ bila pikirijikɛlan yɔrɔ la, i n’a fɔ:
Masina suguya ani a bonya:
Pikirini yɔrɔ labɛncogo: .
Plunger walima screw dilancogo:
Misaliw ni baarakɛcogo ɲumanw .
An ka misali dɔ lajɛ walasa ka pikirijikɛlan silinda yɔrɔ formulaw kɛcogo ɲuman jira. A ka kɛ ko pikirijikɛlan min bɛ kɛ ni silinda kelen ye, o bɛ aw bolo ni pikirijikɛlan ye min janya ye santimɛtɛrɛ 10 ye ani a janya ye santimɛtɛrɛ 8 ye.
Baara kɛ ni silinda kelen formula ye:
Pikiri silinda yɔrɔ = (pikiri silinda janya^2 - Plunger diamètre^2) 0,785 = (10^2 - 8^2) 0,785 = (100 - 64) * 0,785 = 28,26 cm^2
O cogo la, pikiri silinda yɔrɔ tun bɛna kɛ santimɛtɛrɛ 28,26 ye^2.
Pompe kelen revolution volume jatebɔ .
Pompi kelen-kelen sɛgɛsɛgɛli hakɛ ye paramɛtiri nafama ye pikiri kɛcogo la. A bɛ plastiki sɔgɔlen hakɛ jateminɛ min bɛ di pikirijikɛlan fɛ pɔnpe ka jiginni kelen na.
Pompe ɲɛfɔli ni a nafa ka bon siɲɛ kelen revolution volume .
Pompi kelen jiginni hakɛ bɛ tali kɛ plastiki fɛn wulilen hakɛ la min bɛ bɔ a nɔ na pikirijikɛlan ka pɔnpe fɛ jiginni dafalen kelen senfɛ. A ka c’a la, a bɛ suman santimɛtɛrɛ kubik la segin kɔnɔ (CC/SEC).
Nin paramɛtiri in bɛ nɔ bila pikiri teliya la, a degun na, ani a bɛɛ lajɛlen na pikiri kɛcogo la. Pompi kelen-kelen hakɛ jateminɛcogo ɲuman nafa ka bon kosɛbɛ walasa ka masinw ka baara kɛcogo ɲɛ ani ka a yɔrɔ cogoya sabati.
Pompe kelen revolution volume formula .
Pompi kelen-kelen hakɛ bɛ se ka jate ni nin formula in ye:
Pikiri silinda yɔrɔ (cm^2) Pikiri teliya (CM/SEC) segin 60 / Motɛri teliya = Pompi kelen jiginni hakɛ (CC/SEC)
Walasa ka nin formula in kɛ, aw bɛna pikirijikɛlan yɔrɔ dɔn, pikiri teliya, ani pikirijikɛlan teliya.
Fɛn minnu bɛ pompe kelen de kan, olu bɛ se ka wuli .
Fɛn caman bɛ se ka nɔ bila pɔnpe kelen-kelen bɛɛ la, i n’a fɔ:
Pikiri silinda hakɛw:
Pikiri teliya sigicogo:
Motɛri teliya:
Misaliw ni baarakɛcogo ɲumanw .
An ka misali dɔ jateminɛ walasa ka pɔnpe kelen-kelen bɛɛ ka sɛgɛsɛgɛli hakɛ formula baara kɛcogo ɲuman jira. A ka kɛ ko pikirijikɛlan dɔ bɛ aw bolo min kɔnɔ pikirijikɛlan yɔrɔ ye santimɛtɛrɛ 50 ye^2, pikiri teliya ye santimɛtɛrɛ 10 ye/sec, ani motɛri teliya ye 1000 rpm ye.
Baara kɛ ni formula ye:
Pompi kelen jiginni hakɛ = pikirijikɛlan yɔrɔ pikiri teliya segin 60 / motɛri teliya = 50 10 60 / 1000 = 30 cc/sec .
O cogo la, pɔnpe kelen jiginni hakɛ tun bɛna kɛ 30 cc/sec ye.
Pikiri tansiyɔn jateminɛ bɛɛ lajɛlen .
Pikiri tansiyɔn bɛɛ lajɛlen ye paramɛtiri gɛlɛn ye pikiri kɛcogo la. A bɛ fanga hakɛba jira min bɛ kɛ plastiki sɔgɔlen kan pikiri waati la.
Pikiri tansiyɔn bɛɛ lajɛlen ɲɛfɔli ni a nafa .
Pikiri tansiyɔn bɛɛ lajɛlen bɛ tali kɛ fanga minnu bɛ baara kɛ plastiki sɔgɔlen kan, olu faralen ɲɔgɔn kan, ni a bɛ pikiri kɛ nɔgɔbɔlan kɔnɔ. O ye degun ye min bɛ sɔrɔ pikirijikɛlan fɛ ani fɛn min bɛ sɔrɔ a la, o bɛ sɔrɔ ni a bɛ woyo ka tɛmɛ foroko kɔnɔ.
Pikiri tansiyɔn bɛɛ jateminɛcogo ɲuman nafa ka bon walasa ka nɔgɔbɔlan fa ka ɲɛ, ka fɛnw tiɲɛni bali, ani ka pikiri kɛcogo bɛɛ lajɛlen kɛcogo ɲɛ.
pikirijikɛlan min bɛ kɛ ni pikiri ye a bɛɛ lajɛlen na .
Pikiri tansiyɔn bɛɛ lajɛlen bɛ se ka jate ni nin fura ninnu ye:
(1) Sisεmε tansiyɔnba (kg/cm^2) * Pikiri silinda yɔrɔ (cm^2) = pikirijikɛlan tansiyɔn bɛɛ (kg) .
(2) Pikiri tansiyɔn (kg/cm^2) * Vis yɔrɔ (cm^2) = Pikiri tansiyɔn bɛɛ (kg) .
Walasa ka nin formula ninnu kɛ, aw bɛna a ɲini ka sistɛmu tansiyɔnba dɔn, pikirijikɛlan yɔrɔ, pikirijikɛlan tansiyɔn, ani pikirijikɛlan min bɛ kɛ ni juru ye.
Fɛn minnu bɛ pikirijikɛlan tansiyɔn bɛɛ lajɛlen sɔrɔ .
Fɛn caman bɛ se ka nɔ bila pikiri tansiyɔn bɛɛ lajɛlen na, i n’a fɔ:
Fɛn minnu bɛ kɛ ni fɛnw ye:
Mold Design:
Masina jogo:
Misaliw ni baarakɛcogo ɲumanw .
An ka misali dɔ lajɛ walasa ka pikirijikɛlanw bɛɛ lajɛlen furakɛlicogo ɲuman jira. A ka c'a la, pikirijikɛlan dɔ bɛ i bolo min ka sitɛmu tansiyɔn maksimali ye 2000 kg/cm^2 ye, pikirijikɛlan yɔrɔ min ye santimɛtɛrɛ 50 ye^2, ani a bɛ kɛ ni kuru ye min ye santimɛtɛrɛ 10 ye^2. Pikiri tansiyɔn bɛ sigi kilogaramu 1500/cm^2 kan.
Baara kɛ ni formula (1) ye:
Pikiri tansiyɔn bɛɛ lajɛlen = Sigida tansiyɔnba pikirijikɛlan yɔrɔ = 2000 50 = 100.000 kg .
Baara kɛ ni formula (2) ye:
Pikiri tansiyɔn bɛɛ lajɛlen = Pikiri tansiyɔn yɔrɔ = 1500 10 = kilo 15 000 .
O cogo la, pikiri tansiyɔn bɛɛ lajɛlen bɛna kɛ kilogaramu 100.000 ye ni formula (1) ani kilogaramu 15 000 ye ni formula (2) ye.
Vis teliya ani hydraulique moteur kelen revolution volume jate .
Screw speed ani hydraulique moteur single revolution volume ye paramɛtiri nafama fila ye pikiri kɛcogo la. U jɔyɔrɔ ka bon kosɛbɛ pikirijikɛlan ka plastiki seko n’a ka baarakɛcogo bɛɛ lajɛlen dɔnni na.
Vis teliya ɲɛfɔli ani a nafa ani hydraulique motor kelen revolution volume .
Vis teliya bɛ tali kɛ buruburuyɔrɔ la min bɛ kɛ ka fɛnw wuli, a ka c’a la, o bɛ suman ni fɛn caman tigɛli ye miniti kelen kɔnɔ (RPM). A bɛ nɔ bila tigitigi sɔgɔli hakɛ la, a ɲagamini na, ani a sɔgɔli la.
hydraulique moteur single revolution volume, fan dɔ fɛ, o ye ji hakɛ ye min bɛ bɔ a nɔ na hydraulique motɛri fɛ revolisiyɔn dafalen kelen senfɛ. A ka c’a la, a bɛ suman santimɛtɛrɛ kubik la Revolisiyɔn kelen kɔnɔ (CC/REV).
O paramɛtɛrɛw bɛ ɲɔgɔn na kosɛbɛ, wa u jɔyɔrɔ ka bon kosɛbɛ plastiki kɛcogo kɔlɔsili la, ka fɛnw labɛnni basigilen sabati, ani ka pikiri kɛcogo ɲɛ.
Vis teliya ani motɛrɛ hydraulique kelen revolution volume formula .
Jɛɲɔgɔnya min bɛ sɛrɛ teliya ni hydraulique moteur single revolution volume cɛ, o bɛ se ka jira ni nin formulaw ye:
(1) Pompi kelen revolution volume (CC/Rev) * Motɛri teliya (RPM) / Motɛri hydraulique kelen Revolisiyɔn hakɛ = Screw Speed
(2) Pompi kelen revolution volume (CC/Rev) * Motɛri teliya (RPM) / Vis teliya = Motɛri hydraulique kelen Revolisiyɔn kelen .
Walasa ka nin formula ninnu kɛ, aw bɛna a ɲini ka pɔnpe kelen revolution volume, moteur teliya, ani vis speed walima hydraulique moteur single revolution volume dɔn.
Fɛn minnu bɛ nɔ bila juru teliya la ani motɛrɛ hydraulique single revolution volume .
Fɛn caman bɛ se ka nɔ bila juru teliya la ani hydraulique moteur single revolution volume la, i n’a fɔ:
Fɛn minnu bɛ kɛ ni fɛnw ye:
Screw Design:
Compression ratio .
L/D hakɛ .
Elements ɲagamini .
Pikirini yɔrɔ ɲɛfɔlenw:
Misaliw ni baarakɛcogo ɲumanw .
An ka misali dɔ jateminɛ walasa ka a jira ko a bɛ se ka kɛ ni juru teliya ye ani hydraulique moteur single revolution volume formules. A ka c’a la, pikirijikɛlan dɔ bɛ aw bolo min ka pɔnpe kelen bɛ 100 cc/rev, motɛrɛ teliya ye 1500 rpm ye, ani motɛrɛ hydraulique single revolution volume ye 250 cc/rev ye.
Aw bɛ baara kɛ ni formula (1) ye walasa ka juru teliya jate:
Vis Speed = Pompi kelen sɛgɛsɛgɛli Volume Moteur Teliya / Motɛri hydraulique kelen Revolisiyɔn kelen = 100 1500 / 250 = 600 rpm
Baara kɛ ni formula (2) ye walasa ka hydraulique moteur single revolution volume jate:
Motɛri hydraulique kelen revolution volume = pompe kelen revolution volume moteur teliya / vis teliya = 100 1500 / 600 = 250 cc/rev
O cogo la, juru teliya tun bɛna kɛ 600 rpm ye, ani hydraulique moteur single revolution volume tun bɛna kɛ 250 cc/rev ye.
Formula empiriques ka ɲɛsin clamping force ma .
Formula minnu bɛ sɔrɔ ni fanga ye, olu ye fɛɛrɛ nɔgɔmanw ye walasa ka fanga wajibiyalen jateminɛ pikiri kɛli la. O formula ninnu bɛ fɛɛrɛ teliyalen ni nafama di walasa ka masin hakɛ bɛnnen dɔn moulding poroze dilen dɔ kama.
Formula empiriques ɲɛfɔli ni u nafa ka ɲɛsin fanga sirili ma .
Formula minnu bɛ sɔrɔ fɛnw na minnu bɛ se ka kɛ fɛn ye, olu bɛ bɔ ko kɛlenw ni kɔlɔsiliw la pikiri kɛli la. U bɛ jateminɛ kɛ fɛn jɔnjɔnw na i n’a fɔ fɛn dilannen yɔrɔ min bɛ fɔ, fɛnw nafa, ani lakana hakɛ.
Nin formula ninnu nafa ka bon kosɛbɛ kun caman na:
U bɛ sira Di fanga-dafalenw jateminɛni teliya ma .
U bɛ dɛmɛ don ka pikirijikɛlan bɛnnen sugandi .
U bɛ a to a bɛ se ka sirili fanga bɛnnen sɔrɔ walasa ka mɔli da wuli ani ka flash formation bali .
Hali ni formulaw bɛ daminɛ yɔrɔ ɲuman na, a nafa ka bon k’a dɔn ko u tɛ se ka jateminɛ kɛ fɛn kɛrɛnkɛrɛnnen dɔ ka gɛlɛya bɛɛ la.
Formula 1 empirique 1 ka ɲɛsin fanga sirili ma .
Formula fɔlɔ min bɛ kɛ ni fanga ye min bɛ se ka kɛ ka fɛnw siri, o bɛ tali kɛ fɛn min na, o bɛ kɛ ni fanga ye min bɛ wele ko clamping force constant (KP) ani fɛn min bɛ kɛ ka fɛnw sɔrɔ (S):
fanga (T) = fanga min bɛ kɛ ka KP sɔrɔ min bɛ se ka kɛ fɛn ye min bɛ se ka kɛ fɛn ye min bɛ se ka kɛ S (cm^2) Lakanali Factor (1+10%) .
Nin formula in kɔnɔ:
KP ye fɛn ye min bɛ to ka kɛ fɛn ye min bɛ kɛ ka kɛɲɛ ni fɛn ye min bɛ kɛ (a ka c’a la, a bɛ daminɛ 0,3 la ka se 0,8 ma)
S ye fɛn dilannen yɔrɔ ye min bolodara CM^2 kɔnɔ .
Lakanali hakɛ min ye 1,1 (1+10%) ye, o bɛ fɛnw cogoya ni u baarakɛcogo caman ɲɔgɔnna jate .
Nin formula in bɛ fɛɛrɛ teliyalen di walasa ka fanga wajibiyalen jateminɛ ka da fɛn dilannenw jateminɛcogo n’u fɛnw kan.
Formula 2 empirique 2 ka ɲɛsin fanga sirili ma .
Formula émpirique filanan min bɛ kɛ ka fanga siri, o sinsinnen bɛ fɛnw dilanni tansiyɔn kan ani fɛn dilannen yɔrɔ jiralen kan:
Clamping force (T) = Matériel mouléage pressure projeté area s (cm^2) Lakanali factor (1+10%) = 350bar s (cm^2) / 1000 (1+10%)
Nin formula in kɔnɔ:
Material Moulding Pressure bɛ jate 350 bar (nafa ye plastiki caman na) .
S ye fɛn dilannen yɔrɔ ye min bolodara CM^2 kɔnɔ .
Lakanali hakɛ min ye 1,1 (1+10%) ye, o bɛ kɛ ka fɛn caman sɛgɛsɛgɛ .
Nin formula in nafa ka bon kɛrɛnkɛrɛnnenya la ni fɛn kɛrɛnkɛrɛnnenw nafa ma dɔn, bawo a bɛ tali kɛ sɛnɛfɛnw degun hakɛ la min bɛ kɛ ka kɛɲɛ ni sariya ye.
Misaliw ni baarakɛcogo ɲumanw .
An ka misali dɔ lajɛ walasa ka ɲɛfɔli kɛ formula empiriques (fɔɔnɔw) waleyali waleyali kan walasa ka fanga siri. A ka c’a la, fɛn dɔ bɛ i bolo min bonya bɛ se santimɛtɛrɛ 500 ma, ani i bɛ baara kɛ ni ABS plastiki ye (KP = 0,6).
Baara kɛ ni formula 1 ye min bɛ sɔrɔ kosɛbɛ:
fanga (T) = kp s (1+10%) = 0,6 500 1,1 = 330 T .
Baara kɛ ni formula 2 ye min bɛ sɔrɔ empirical la:
Kɔlɔn fanga (T) = 350 s / 1000 (1+10%) = 350 500 / 1000 1,1 = 192,5 T
O cogo la, formula 1 empirical bɛ 330 T sirili fanga jira, k’a sɔrɔ formula 2 empirique bɛ a jira ko fanga bɛ se ka siri 192,5 t.
Plastiki seko jatebɔ .
Pikiri dilanni na, plastiki seko jɔyɔrɔ ka bon kosɛbɛ a kɛcogo ɲuman n’a kɛcogo ɲuman dɔnni na. An ka nin hakilina in sɛgɛsɛgɛ ka taa a fɛ ani k’a jatebɔcogo dege.
Faamuyali plastiki seko la .
Plastiki seko bɛ tali kɛ plastiki fɛn hakɛ la min bɛ se ka wuli ani ka kɛ kelen ye ni pikirijikɛlan ka juru ni barili sitɛmu ye waati dɔ kɔnɔ. A ka c’a la, a bɛ fɔ garamu la segin kɔnɔ (G/sec).
Plastiki seko nafa bɛ a nɔ tilennen de la:
Production rate .
Matériel consistance .
part qualité .
Plastiki seko dɔgɔyali bɛ se ka kɛ sababu ye ka cycle waatiw janya, ka ɲagami ka ɲɛ, ani ka yɔrɔw cogoya bɛnbaliw ma. Faan wɛrɛ fɛ, plastiki seko tɛmɛnen bɛ se ka kɛ sababu ye ka fɛnw tiɲɛ ani ka fanga caman ta.
Aw bɛ se ka plasitiki seko jateminɛ cogo di?
Pikiri dilanni masin ka plastiki se bɛ se ka jate ni nin formula in ye:
W(g/sec) = 2,5 × (D/2,54)^2 × (H/2,54) × N × S × 1000 / 3600 / 2
Min:
W: Plastiki seko (G/SEC) .
D: Vis diamètre (cm) .
H: Vis channel juguya bɛ ɲɛfɛ (cm) .
N: Vis jiginni teliya (RPM) .
S: fɛnɲɛnamafagalanw ka density .
Walasa ka baara kɛ ni nin formula in ye, aw bɛna a ɲini ka vis geometry (diamètre ni channel depth) dɔn, ka juru teliya, ani ka plastiki fɛn min bɛ baara kɛ, o density.
An ka misali dɔ jateminɛ walasa ka jatebɔ taabolo jira. A ka kɛ ko pikirijikɛlan dɔ bɛ aw bolo min bɛ nin fɛn ninnu ɲɛfɔ:
Vis diamètre (d): 6 cm .
Vis channel kɔnɔna na, a ɲɛfɛla la (H): 0,8 cm .
Vis jiginni teliya (n): 120 rpm .
Fɛn minnu bɛ sɔrɔ fɛnɲɛnamafagalanw na (S): 1,05 g/cm^3.
O nafaw don formula kɔnɔ:
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/sec .
Nin misali in na, pikirijikɛlan ka plastiki seko bɛ se garamu 7,59 ma segin kɔnɔ.
Baarakɛcogo ni jateminɛ kɛcogo ɲumanw .
Ni aw bɛ jatebɔcogo formula kɛ ka ɲɛsin pikiri kɛcogo ma diɲɛ kɔnɔko lakikaw la, fɛn caman ka kan ka jateminɛ walasa ka ɲɛtaa ɲumanw sɔrɔ. An ka nin jateminɛ ninnu sɛgɛsɛgɛ k’a lajɛ u bɛ nɔ bila cogo min na pikirijikɛlanw sugandili la fɛn kɛrɛnkɛrɛnnenw kama.
Fɛn minnu ka kan ka jateminɛ .
Walasa ka yɔrɔ ɲuman ni fɛn dilanni nafama sɔrɔ, a nafa ka bon kosɛbɛ ka nin paramɛtiri jɔnjɔnw jateminɛ:
fanga min bɛ mɔgɔ minɛ:
Pikiri tansiyɔn: .
A bɛ nɔ bila fali teliya la ani a pakeli la.
A bɛ nɔ bila yɔrɔ density la, surface fini, ani dimension stabilité .
Pikiri hakɛ:
Pikiri teliya:
A bɛ nɔ bila fasacogo la, sɔgɔli hakɛ la, ani fɛnw bolicogo la .
A bɛ nɔ bila a yɔrɔ in cogoya la, a ka masina cogoyaw la, ani a ka cycle waati la .
Ni nin ko ninnu sɛgɛsɛgɛli kɛra koɲuman ani ka baara kɛ ni jatebɔcogo bɛnnenw ye, pikiri kɛcogo ɲɛnabɔbagaw bɛ se ka taabolo paramɛtiriw kɛ ka ɲɛ ani ka masin min bɛnnen don kosɛbɛ baara dilen dɔ kama, o sugandi.
Masina ɲɛfɔli minnu bɛ bɛn fɛn dilannenw wajibiyalenw ma .
Walasa ka a jira ko a nafa ka bon ka masinw ka fɛn dilannenw ni fɛn dilannenw wajibiyalenw bɛn ɲɔgɔn ma, an ka jateminɛ kɛ ko damadɔw la minnu kɛra:
Kalansen 1: Mobili kɔnɔna yɔrɔ .
O cogo la, pikirijikɛlan min fanga ye tɔni 150 ye a dɔgɔyalenba la ani pikiri hakɛ min bɛ se ka kɛ santimɛtɛrɛ 150 ye^3 walima ka tɛmɛ o kan, o bɛna bɛn. Masina ka kan ka se fana ka pikirijikɛlan tansiyɔn ni teliya wajibiyalen mara ABS fɛn na.
Kalansen 2nan : furakɛli minɛnw yɔrɔ .
Nin furakɛli minɛn yɔrɔ in na, pikirijikɛlan fitinin min fanga bɛ tɔni 30 ɲɔgɔn na ani pikiri hakɛ min bɛ se ka kɛ santimɛtɛrɛ 10 ye^3, o bɛ bɛn. Masina ka kan ka kunnafoni tigitigi sɔrɔ pikirijikɛlan tansiyɔn ni teliya kan walasa ka a dɔn ko a hakɛ bɛ se ka kɛ cogo min na ani ka a sanfɛla cogoya dɔn min ka kan ka kɛ furakɛli baara la.
| Case Study | Material | Part Dimensions (mm) | Kogo janya (mm) | A wajibiyalen don ka siri fanga la (tons) | pikiri hakɛ (cm^3) |
| 1 | ABS . | 250 x 150 x 50 . | 2.5 | 150 | 150 |
| 2 | PC . | 50 x 30 x 10 . | 1.2 | 30 | 10 |
Kuncɛli
Nin barokun in kɔnɔ, an ye pikiri kɛcogo ɲumanw sɛgɛsɛgɛ. Jateminɛ tigitigi minnu bɛ kɛ ka ɲɛsin fanga sirili fanga ma, pikiri tansiyɔn, ani teliya ma, olu nafa ka bon kosɛbɛ. O formula ninnu bɛ kɛ sababu ye ka baarakɛcogo ɲuman ni fɛn dilannenw cogoya sabati.
Baara kɛli ni formula tigitigiw ye, o bɛ dɛmɛ ka i ka pikiri kɛcogo ɲɛ. Jateminɛ tigitigiw bɛ fiɲɛw bali ani ka fɛn dilanni nafa bonya.
Aw bɛ nin fura ninnu kɛ ka ɲɛ tuma bɛɛ. O kɛli fɛ, aw bɛna ɲɛtaa ɲuman sɔrɔ aw ka pikiri kɛcogo porozew la.
