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瓶口螺纹标准
CapandNeckFinishes
?Screwthreadcapsizesaregenerallyexpressedastwonum
(inmillimet
ers)andthecorrespondingGlassPackagingInstitute(GPI)
/SocietyofthePlasticsIndustry(SPI)finishdiameter.
?Thesecondnumberreferstotheheightandthreadconfigu
nlyusedcapsandfinishes.
S=ThreadStart
H=FinishHeight
T=MajorDiameter
E=MinorDiameter
I=HoleDiameter
-Outsidediameterofthecontinuousthread
-Outsidediameterofthefinishshaftexcludingthread
-Theinsidediameterofthefinishatthesmallestpossiblepoint
S-Thedistancebetweenthetopofthefinishtothetopofthethread
-Thedistancebetweenthetopofthefinishtothetopofthetransferbead??(optional)
-Heightfromthetopofthefinishtothebottomwhereitintersectswiththeshoulder
-Thethicknessofthetransferbead(optional)
?StandardPlasticFinishesMostCommonlyUsed...
ThediameterofClosures StandardNeckFinishes
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(1turnofthread) ()
（1圈螺牙） （）
（高位2圈螺牙）
(Short2turnsthread)
(Tall2turnsthread)
（低位2圈螺牙）
??PlasticThreadForms...
Plasticthreadformfinishestypicallyhaveastandard"M"stylethreadform,
n"L"
.
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