kayak mould / molding , decorative plaster molds design
Super Quality high precision Plastic Injection Moulding parts,OEM/ODM Custom injection plastic moulding product for gasmeter
shaping mold : plastic injection mould
Material As you request, can be PE / PVC / PP / PS / ABS / PC / POM / Nylon / PET / PPO / PU / EP / UP / Acrylic
Surface treatment: polish Deburring,etc,as you request
injection mould life:45#:50000-100000shots
corrugated box for plastic injection parts, wooden case for injection mold
Gate type:Cold runner or hot runner
platic injection mold workshop show:
Plastic prodcust show:
1,plastic pre-treatment for abs injection molding
ABS water absorption ratio is about 0.2% -0.8%. for the normal ABS before molding ,itsdrying time in oven is for 2-4 hours at 80-85 ℃ ,or in hopper 80 ℃ at 1-2 hours. if PC material mixed with heat-resistant grade ABS, its drying temperature should be increased to 100 ℃. The proportion of the recycled ABS materials can not exceed 30%, electroplating grade ABS can not be used again at plastic injection moulding manufacturer facilities.
2, mold and gate design
The mold for abs injection temperature can be set to 60-65 ℃. Runner diameter is 6-8mm. Gate width is
3mm, if the thickness of the article should be same as gate, the gate length is less than 1mm. Vent width 4-6mm, and its thickness 0.025-0.05mm.
Melt temperature could be decided by Air injection . Different grades of ABS means that their melt
temperatures are also different, we recommend the following settings for plastic injection moulding manufacturer:
Impact resistance grade: 220 ℃ -260 ℃, 250 ℃ better
Plating grade: 250 ℃ -275 ℃, 270 ℃ better
Heat-resistance grade: 240 ℃ -280 ℃, 265 ℃ -270 ℃ better
Flame Retardant grade: 200 ℃ -240 ℃, 220 ℃ -230 ℃ better
Transparent grade: 230 ℃ -260 ℃, 245 ℃ better
Glass fiber reinforced grade: 230 ℃ -270 ℃
High requirements for products surface is, the higher melt temperature and mold temperature should be.
4, the injection speed
Flame Retardant grade with slow speed, Heat-resistance grade with quick speed. abs injection molding products with high surface requirements should take use of high-speed and multi-stage injection rate .
5, back pressure
Back pressure should be as low as possible under normal circumstances, the normal back pressure is 5 bar.
6, residence time in barrel
At a temperature of 265 ℃, maximum of 5-6 minutes residence time in the barrel . Flame Retardant grade
ABS is even shorter.For the downtime, it should set the temperature as low as 100 ℃, and then clean up
barrel with the melting common grade ABS . after cleaning up,the mixture should be put into cold water to prevent further decomposition. if ABS need to replace the other material used, it firstly need clean up barrel with PS, PMMA or PE. Some ABS products is without any problems after releasing from the mold , but over a period of time, they could be discolored,for it may be overheating or melting plastic staying too long in barrel.
8, the products after-treatment,
ABS injection moulding products generally do not need the further treatment, only plating grade products should be subject to heat (70-80 ℃ ,2-4 hours) to remove the surface traces.Electroplated products could
not use release agents, and products should be packaged immediately after removing from the mold .
9, other issues
There are several grades of ABS (especially flame retardant grade), after the plasticizing , its adhesion
force is large on the screw, after long time it will decompose. When that happens, we need to pull, wipe and clean up the screw regularly with PS and other plastic material.
Plastic injection mold show:
Q:what’s delivery time of the plastic injection mold?
A: Short delivery time: 35-50 working days.
Q:How can i know you produce the right plastic mould or tooling?
A: we can provide free prototype before making mold.
Q; How do you handle the wrong mold?
A: we can help to correct not good mold design.
Q:How can you confirm the plastic injection mold you produce is the one we need?
A: we can provide professional mold analysis reports before mold making .
Q:What can we do if we don’t have the mold drawing ?
A: you will only provide the actual sample to us then we can help you to make the design injection mold drawings for your confirmation
Q:Can we test the plastic injection mold?
A:after the mold is ok ,we can help you to test the mold for free.
Q:Can you process the die-casting parts of injection mold?
A: We can help to process die-casting parts for small run or mass production.
Q:What about the plastic products samples are wrong?
A: if you are not satisfied with the plastic sample, we can send the sample to you again for free.
Q:What if the plastic goods are different with the samples?
A: If you received the goods are not the same as the sample, we accept the goods refunded ,and all the shipping freight charge at our side .Also we will refund all the money to your account.
Q:What if we receive the unqualified PVC/PE/PP/PS/ABS products?
A: If you found have some parts of bad quality products , then we will accept to send the good quality one to you again.
Q:What if we meet the transportation trouble when deliver the custom plastic mold?
A: If you meet some shipping transportation problems, we can help you to solve at first time.
Q:How soon can we receive the quotation of the plastic injection mold?
A. Your inquiry related to our products or prices will be replied within 24hours
Q:What about your team of making plastic injection mold?
A: Well-trained and experienced staffs to answer all your enquiries in fluent English