The reason analysis for slow injection molding

(1)Long cooling time for plastic temperature,mold temperature,temperature control
(2)Long melt time.Back pressure shall be reduced,try to use recycle material to prevent overhead,need enough cooling of material feeding period feeding period of cooling.
(3)Slow moving action.Make it appropriate to speed up the adjustment through the oil and circuit.
(4)Mould design request easy to demoulding.make to a fully automatic operation.
(5)Products wall thickness cause the cooling time too long.
(6)Nozzle salivate,interfere with the normal production.Should adopt shut-off nozzle,or reduce the temperature of the nozzle.
(7)Cylinder heating quantity shortage.Should change with the plasticizing capacity big machines or strengthen the preheating of material.

Sino mould professional in various mould molding solution reaserch,And each moulds we will make to moderate mould stripping way and best cooling system.All the moulds we make according to above moulds items.

Written by Tina
whatsapp:008615167663781
serve@sinomould.com

Small injection gate injection molding advantage

Gate is the a critical period of material circulation in the gating system.Apart from the mainstream way type pouring outlets,most of the gate are minimum sectional area of the gating system, only 3%-9% of bypass road cross-sectional area.

Using small gate appear the forming pressure drop caused by increasing the flow resistance,can be compensate within a certain range of increase of injection pressure method.

Using small gate in injection molding,has the following advantages
1.There is a big pressure difference at the small gate of front and back side,can effectively increase the shear rate of melt and generate larger shear heat,leading to the melt apparent viscosity decreased,liquidity enhancement,is advantageous to the mold filling.Like.PP,PS,PE...material.
2.If small gate,may through the test mould or repairing the mould adjust the volume of small gate,the gate of the melt in the process of the pressure maintaining frozen in time,so as to properly control the feeding time, avoid warping deformation products.
3.Can wait the small gate freeze products,all as long as the external solidified layer has enough strength and stiffness can will product release,no need to stay until internal curing.so as to shorten the molding cycle,improve production efficiency.
4.The small gate in the multimode cavity can balance the feed speed of each cavity for gating system balance.
5.Small gate can have small tip water mark.

Forming large products,also should pay attention to the gate area corresponding amplification,sometimes need to amplify gate section height to near products,one of the biggest thickness can improve the liquidity of the melt.

Written by Tina

Mail:service1003@anole-hot-runner.com