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8/14/2019 Plastic Mold Operation Key Points
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8/14/2019 Plastic Mold Operation Key Points
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Fasten mold to injection machine
1,$fter estimation of the mold weight and molding situation,the right clamping bolt could
be adopted. &old weight over 1 %on,the clamping bolt should not be less than ' pieces
on the $ and ! plates,mold weight below 1 %on,( clamping bolts should be used on the
both plates.
", ejection bars should be same length and diameter for the balance pushing to the
ejector pins plate.when the ejection bars retrack,there should have a gap between the
bars and ejector pins plate.
)f ejector pins plate is forced to recover place ,the connecting screws should be
adopted,and no gap need.
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Connection of
water hose
1, $fter
connection of
the cooling hoseand water
plug,confirm the
connection
situation by
hands
", *ater plug of
+water out and
+water in
should be
connectedcorrectly
according to the
specified
seuence ,any
changed
seuence would
have a negative
impact on the
uality offinished part.
#,%o avoid
possible interfering with the cooling water hoses when mold is opening and closing,it
should use the appropriate length of the hose.
(,)f the longer hoses is unavoidable, the proper length should be arranged properly to
prevent to bruise water hose and damage mold.
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Confirmation of the oil hose and limit switch connection
1.heck the oil hose for the possible leakage.
".heck theopening and
closing of the mold
for unusual
sounds.
#.heck the limit
switch installing
and wires.
(.onfirm when
mold ejection
plate normallymove, the limit
switch completely
response.
Injection
molding
1.!efore the
injection molding
begins, the mold
should be heated
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up firstly.
%he security door should be shut off. $fter the security door is closed, the operator
shouldnt go intothe inside of the injection machine.
".the mold shouldnt be fully filled at the first shot, and it should be operated like this way 3-4 times before the
final full filling.
#.o not apply the the inappropriate clamping force /below the minimum reuirement0
(.o not apply the the inappropriate injection pressure /below the minimum
reuirement0. !e cautious of ecessive filling.
The treatment of
excessie filling
1.Overfilling
plastic or
plastic inside
slider2 slotneed to be
completely
removed
immediately.
Overfilling
plastic should
be removed
completely
when space ofthe slider
center, spring,
the head of the
screw and
bushing are
filled with them.
".$fter the plastics scrape is removed, the check for the normal operation should be
done. %he net injection molding cycle should never be done until they are cleaned
completely.
#.%he tools removing the overfilling and plastics sticked should be prohibited from theharder metalones, like crowbar, wrench, hammer, screwdriver.%he tools contacting directly
with surface of the cavity and core should be made of copper! aluminum.
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3egrind material:
4ach shift should check the hopper magnet for little metal scrapes to aoid possible damageto the
barrel screw and hot runner.
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Check
points
for the
plastic
mold
1,
parting
surface.3egularly clean and keep no foreign body on that.the burr and scrape on the
surface should be removed immediatly otherwise they will bruise and damage the mold
surface
", %he guide pins the guide bushing.%he guide pins the guide bushing should be cleaned
regularly,and remove the used lubricate on that. 5uide pin with abnormal wear of thesurface should be fied in the tooling shop.$fter check and fiing,they should be
lubricated again.
# slots on the core ,cavity and sliders.6lots on the core ,cavity and sliders should be
cleaned regularly and checked for the abnormal wear and rust.
(, cooling water.heck the cooling pipes for unnormal bend to prevent clogging.heck
water plug for leakage,gasket damage and plug wear and deformation will result in the
cooling water leakage ,they should be inspected regularly.
7, hydraulic cylinder.heck the hydraulic cylinder on the mold for oil leakage,and confirm
the stable movement of the sliders activated by the cylinder.
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The maitenance of the plastic mold
1,$fter molding, mold should be transported to the tooling workshop timely to clean the
water inside the cooling channel with blowing of compressed air and lubricate for the
rust.%he water remained inside the channel should lead to the rust in the channel and
then clog the it,which could result in poor cooling.
",8ot runner mold.$fter the hot runner system power are shut off,it need at least
another 17 minutes for the circulation of the cooling water working,otherwise, 9ailure to
do so will result in adverse conseuences of the +O ring damage and leak in the cavity.
#,$fter molding,the surface of cavity and core should be sprayed with the anti-rust agent
if the mold could be stored for a long time.(,$fter the mold is released from the injection machine,it should be locked by the lock
plates
7,%he mold should be place in the circumstance free of the water and moisture.
,&old should not be placed directly on ground such as concrete.
;,omponents and cooling hose on the bottom side of mold should not touch the
ground.
',Put the mold on the ground same direction as it in the injection machine.
http://www.myplasticmold.com/plastic-mold-maintenance.htmlhttp://www.myplasticmold.com/plastic-mold-maintenance.html8/14/2019 Plastic Mold Operation Key Points
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Plastic mold
maintenance steps
1.:,, ,
,,,,,,.
Prepare mold cleaning
tools:spray gun,$ir
gun,electric hand
drill,leaning fluid ,
clean loth ,Oil
stone,
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heck whether the elasticity of the spring is sufficient
1'.O .
heck whether the +Oring is damaged.
1A.b 9TU\]cdefgh ,9(\])idefgh.
heck whether the four puller of cavity plate is eual in length and whether the
puller hole is eual in depth.
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