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The viscosity is high because the parison needs to hold its shape.
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When the parison is placed in the second mold, its viscosity is low. This allows the parison to be easily shaped and molded into the final bottle shape. As the parison cools and solidifies, its viscosity increases, helping to retain the bottle shape.
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Parison tubes can be purchased from scientific equipment suppliers or online retailers that specialize in laboratory glassware. Alternatively, you may find them at specialized glassblowing or glass art supply stores.
2 answers
In injection blow molding starting parison is injection molded rather than extruded.
In extrusion " " extrusion of parison occurs.
There is three steps in injection blow molding: injection, parison and ejection.
Tooling cost is higher in injection blow molding.
one more, hot knife cut off the resins coming from heating zones before these goes to mold.
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The answer is not simple. First you'd need to understand how bottles can be manufactured through different processes. Extrusion Blow Molding is a process that allows you to make a bottle using
a) an EXTRUDER to melt and feed material to b) an EXTRUSION HEAD, and then form a c) PARISON (which is a sort of a hot plastic hose that can later be blown with high pressure air) that is brought into a d) MOULD that will cool-down the plastic giving it its final form. In the extrusion head, the hot plastic (fluid) is guided trough some channels that form the Parison, several different systems are used to form a parison, and they vary from manufacturer to manufacturer. Once you have a parison you can superpose it onto another parison (it's like forming an onion) and you can add several parisons to form different layers, you can use different materials as long as you can make them stay united. The multilayer parison is then brought into the mould and blown to adopt the form of it, which can be a bottle or some other forms. In Injection Blow Molding you can also use the multilayer process to form a bottle. The process is quite different here: you need to inject first a preform (which is a sort of tube o proto-bottle) and then you condition its temperature to allow blowing in a next step. For this process you need two molds, one that will be used for injection and the other that will be used to blow the bottle. The preform or proto-bottle is then brought into the blowing mould and blown to the shape of the bottle using high pressure air. To form several layers you need a multi-extruder or canyon capable machine that injects the material layer onto layer. You can have several different materials as long as they are compatible and stick together. I hope this is clear for you - if not, i could expand the answers, and maybe include a picture....
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Hey there,
Blow molding is a manufacturing process by which hollow plastic parts are formed. In general, there are three main types of blow molding: extrusion blow molding, injection blow molding, and injection stretch blow molding. The blow molding process begins with melting down the plastic and forming it into a parison or in the case of injection and injection stretch blow moulding (ISB) a preform. The parison is a tube-like piece of plastic with a hole in one end through which compressed air can pass.
- noizyoyster.com
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In injection moulding the polymer is moltern and 'injected' into a mould. in blow moulding the polymer is as a sheet or as a parison that is pushed into a mould by air.
I guess the main difference is injection moulding fills the mould with solid parts where as blow moulding just creates a thin surface
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According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern PA-I-O-. That is, seven letter words with 1st letter P and 2nd letter A and 4th letter I and 6th letter O. In alphabetical order, they are:
parison
paritor
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According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern P--IS-N. That is, seven letter words with 1st letter P and 4th letter I and 5th letter S and 7th letter N. In alphabetical order, they are:
parison
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According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 7 words with the pattern -A--S-N. That is, seven letter words with 2nd letter A and 5th letter S and 7th letter N. In alphabetical order, they are:
caisson
madison
malison
parison
samisen
warison
waveson
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According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern PA--S-N. That is, seven letter words with 1st letter P and 2nd letter A and 5th letter S and 7th letter N. In alphabetical order, they are:
parison
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According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 9 words with the pattern -A--SO-. That is, seven letter words with 2nd letter A and 5th letter S and 6th letter O. In alphabetical order, they are:
caisson
latosol
madison
malison
parasol
parison
vavasor
warison
waveson
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According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 6 words with the pattern P---S-N. That is, seven letter words with 1st letter P and 5th letter S and 7th letter N. In alphabetical order, they are:
parison
pocosen
pocosin
pocoson
poisson
poussin
1 answer
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern PA--SO-. That is, seven letter words with 1st letter P and 2nd letter A and 5th letter S and 6th letter O. In alphabetical order, they are:
parasol
parison
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According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern -AR-S-N. That is, seven letter words with 2nd letter A and 3rd letter R and 5th letter S and 7th letter N. In alphabetical order, they are:
parison
warison
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According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 7 words with the pattern --R-SO-. That is, seven letter words with 3rd letter R and 5th letter S and 6th letter O. In alphabetical order, they are:
aerosol
chrisom
girasol
girosol
parasol
parison
warison
1 answer
Blow ratio in blow molding refers to the ratio of the parison (hollow tube of plastic) diameter to the final container diameter. It is an important parameter that affects the wall thickness distribution and mechanical properties of the molded container. A higher blow ratio results in thinner walls and better material distribution in the final part.
2 answers
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern P-R-S-N. That is, seven letter words with 1st letter P and 3rd letter R and 5th letter S and 7th letter N. In alphabetical order, they are:
parison
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According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 5 words with the pattern --RIS-N. That is, seven letter words with 3rd letter R and 4th letter I and 5th letter S and 7th letter N. In alphabetical order, they are:
parison
rerisen
unrisen
uprisen
warison
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According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 8 words with the pattern P---SO-. That is, seven letter words with 1st letter P and 5th letter S and 6th letter O. In alphabetical order, they are:
parasol
parison
petasos
plessor
plimsol
pocoson
poisson
pressor
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According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 5 words with the pattern PAR-S--. That is, seven letter words with 1st letter P and 2nd letter A and 3rd letter R and 5th letter S. In alphabetical order, they are:
parasol
pareses
paresis
parises
parison
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According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 5 words with the pattern P-RIS--. That is, seven letter words with 1st letter P and 3rd letter R and 4th letter I and 5th letter S. In alphabetical order, they are:
parises
parison
porisms
purisms
purists
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According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 8 words with the pattern ---ISON. That is, seven letter words with 4th letter I and 5th letter S and 6th letter O and 7th letter N. In alphabetical order, they are:
benison
cloison
liaison
madison
malison
parison
venison
warison
1 answer
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern P-RIS-N. That is, seven letter words with 1st letter P and 3rd letter R and 4th letter I and 5th letter S and 7th letter N. In alphabetical order, they are:
parison
1 answer
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 12 words with the pattern PAR--O-. That is, seven letter words with 1st letter P and 2nd letter A and 3rd letter R and 6th letter O. In alphabetical order, they are:
parador
parados
paradox
paragon
paramos
parasol
parazoa
parison
paritor
parodoi
parodos
partook
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According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 28 words with the pattern -A-I-O-. That is, seven letter words with 2nd letter A and 4th letter I and 6th letter O. In alphabetical order, they are:
calicos
caligos
capitol
caribou
casinos
galipot
halidom
halimot
haricot
janitor
katipos
ladinos
latigos
latinos
madison
malison
manihoc
manihot
manitos
manitou
maticos
matipos
parison
paritor
sadiron
saligot
talipot
warison
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According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 20 words with the pattern P-R-S--. That is, seven letter words with 1st letter P and 3rd letter R and 5th letter S. In alphabetical order, they are:
parasol
pareses
paresis
parises
parison
perusal
perused
peruser
peruses
phrasal
phrased
phraser
phrases
porisms
poroses
porosis
purisms
purists
pyroses
pyrosis
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According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 25 words with the pattern ----SON. That is, seven letter words with 5th letter S and 6th letter O and 7th letter N. In alphabetical order, they are:
benison
blouson
caisson
chanson
classon
cloison
crimson
ecdyson
frisson
johnson
keelson
liaison
madison
malison
parison
pocoson
poisson
sponson
stemson
stepson
stetson
treason
venison
warison
waveson
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If we assume that sufficient air pressure is being used to mold the bottle, it is probable that the temperature of the material being used is too low, and this would mean that the viscosity is too low to insure the material being blown takes the proper shape of the mold.
2 answers
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 37 words with the pattern P----ON. That is, seven letter words with 1st letter P and 6th letter O and 7th letter N. In alphabetical order, they are:
paction
paillon
paragon
parison
passion
patroon
peloton
pension
peraeon
pereion
pericon
perigon
phaeton
pidgeon
pillion
plasmon
platoon
plerion
pleuron
plosion
pocoson
poisson
polaron
polygon
pompion
pompoon
pontoon
portion
positon
prenoon
psammon
pterion
puccoon
puldron
pulsion
pultoon
pumpion
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1- Binary language 2- Assembly Language
4 answers
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 63 words with the pattern -A---ON. That is, seven letter words with 2nd letter A and 6th letter O and 7th letter N. In alphabetical order, they are:
balloon
bargoon
baryton
bassoon
bastion
cabezon
caisson
caldron
camaron
campion
cantion
caption
cardoon
carrion
carryon
cartoon
caudron
caution
dalapon
daunton
faction
fashion
fauchon
gadroon
galleon
galloon
halcyon
hallion
hallyon
harpoon
jargoon
lampion
lampoon
lardoon
madison
madzoon
malison
mamelon
mansion
matzoon
paction
paillon
paragon
parison
passion
patroon
raccoon
rampion
rattoon
sabaton
sabayon
sacaton
sadiron
saffron
salamon
tachyon
taction
tampion
tardyon
waitron
warison
waveson
zacaton
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According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 80 words with the pattern P---S--. That is, seven letter words with 1st letter P and 5th letter S. In alphabetical order, they are:
palases
paniscs
panisks
papisms
papists
parasol
pareses
paresis
parises
parison
paviser
pavises
pavisse
pedeses
pedesis
pegasus
pelisse
penises
perusal
perused
peruser
peruses
petasos
petasus
pheesed
pheeses
phrasal
phrased
phraser
phrases
pinesap
piously
plaases
pleased
pleaser
pleases
plessor
plimsol
plisses
plussed
plusses
pocosen
pocosin
pocoson
podesta
poisson
porisms
poroses
porosis
potassa
poursew
poursue
pousses
poussie
poussin
praeses
praised
praiser
praises
preased
preases
preasse
pressed
presser
presses
pressie
pressor
priests
primsie
prissed
prisses
prosses
prossie
prussic
psoases
pubises
purisms
purists
pyroses
pyrosis
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According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 120 words with the pattern P----O-. That is, seven letter words with 1st letter P and 6th letter O. In alphabetical order, they are:
paction
pageboy
paillon
pakapoo
pakokos
paletot
palmtop
palolos
pandoor
papadom
parador
parados
paradox
paragon
paramos
parasol
parazoa
parison
paritor
parodoi
parodos
partook
passion
patriot
patroon
peascod
pedagog
pedalos
pekepoo
peloton
pension
pepinos
peraeon
pereion
pericon
peridot
perigon
pertook
petasos
phaeton
phantom
pharaoh
phyllos
physios
picador
picaros
pidgeon
pierrot
pilcrow
pillbox
pillion
pinitol
pitprop
plasmon
platoon
playboy
pledgor
pleopod
plerion
plessor
pleuron
plimsol
plonkos
plosion
plowboy
plumcot
plywood
pocoson
poisson
polaron
polycot
polygon
polypod
polyzoa
pomelos
pomeroy
pompion
pompoon
ponchos
pontoon
popedom
porthos
portion
positon
postbox
postboy
postdoc
pothook
potoroo
potshop
potshot
praetor
prebook
preboom
precook
precool
predoom
prenoon
preriot
preshow
pressor
prestos
princox
proctor
pronaoi
pronaos
psammon
pseudos
psychos
pterion
puccoon
pueblos
pukekos
puldron
pulsion
pultoon
pumelos
pumpion
punctos
pushrod
1 answer
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 121 words with the pattern --R-S--. That is, seven letter words with 3rd letter R and 5th letter S. In alphabetical order, they are:
abrasax
abrosia
acrasia
acrasin
aerosat
aerosol
agraste
agrised
agrises
akrasia
aorists
arrased
arrases
arrests
arrises
atresia
atresic
aurists
barista
bartsia
bortsch
cerasin
ceresin
cerises
ceruses
chrisma
chrisms
chrisom
christy
corpsed
corpses
curtsey
daresay
dorised
dorises
duresse
foresaw
foresay
foresee
forests
girasol
girosol
gyrases
gyruses
hardset
harissa
haroset
herisse
ivresse
jurists
karoshi
lorises
lyrisms
lyrists
marasca
merises
merisis
merisms
morassy
morisco
moroser
narases
ogrisms
orrises
parasol
pareses
paresis
parises
parison
perusal
perused
peruser
peruses
phrasal
phrased
phraser
phrases
porisms
poroses
porosis
purisms
purists
pyroses
pyrosis
rerisen
rerises
saroses
saruses
serosae
serosal
serosas
siroset
soroses
sorosis
thrists
thristy
thrusts
tirasse
turfski
turista
unrests
unrisen
uprests
uprisal
uprisen
upriser
uprises
uprists
varuses
verismo
verisms
verists
viroses
virosis
viruses
warison
workshy
xerasia
xeroses
xerosis
xeruses
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