Plastic Mold Operation Key Points

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.html


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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.

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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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Plastic Mold Operation Key Points