Generally, during the processing of Customized Wine bottle cap, due to the insufficient filling of the cavity of the mold, the phenomenon that the shape of the part does not match the design is called lack of material.
Customized Wine bottle cap device method
There are many technological factors that lead to the shortage of material in Customized Wine bottle cap, the most important of which are three factors: low filling pressure, short injection time and low mold temperature.
When the filling pressure is small, the injection molding machine will cause insufficient pressure in the cavity during injection molding, and it will be difficult for the plastic to fill the entire cavity, resulting in a shortage of material for the Customized Wine bottle cap.
Short injection time will also cause the plastic to not completely fill the cavity.
Lead to material shortage of parts; low mold temperature will accelerate the solidification of plastic, reduce the fluidity of liquid, and also cause plastic to not fill the entire cavity, resulting in material shortage.
Equipment reason
The main reason for the lack of material in the Customized Wine bottle cap is the nozzle part, which is usually blocked by the nozzle. The general method is to clean the nozzle to solve it.
Mold reason
Generally, it is caused by the poor exhaust inside the mold. Since the accumulated air in the cavity cannot be discharged, the filling amount of plastic will be insufficient, resulting in material shortage.
The measures taken are to reduce the filling speed of the plastic or increase the corresponding discharge on the mold. stomata.
Due to the blockage or unbalanced flow of the hot runner, the flow of plastic melt is not smooth, resulting in material shortage of the Customized Wine bottle cap.
Generally, the measures taken are to increase the temperature of the hot runner corresponding to the shortage product, and use delicate and clean raw materials .
It generally occurs at the parting position of the mold, such as: the parting surface of the mold, the matching position of the slider, the side clearance of the insert, the hole of the push rod, etc.
When the overflow problem is not solved in time, the flash will expand.
The flash generated by the side clearance of the insert and the hole of the push rod will cause the plastic part to be stuck on the mold and affect the parting.
Process method
It is generally caused by the excessive injection pressure of the injection molding machine or the faster injection speed.
Due to the high pressure and high speed in the mold cavity, the tension of the mold increases and the flashing phenomenon occurs.
The general solution is to extend the injection time and pressure holding time.
Equipment
The clamping force of the machine itself is not enough. As a result, the mold cannot be pressed normally.
Generally, when selecting the model of the injection molding machine, the rated clamping force specified by the machine must generally be greater than the tension formed by the axial cross-sectional area of the injection molded part during injection, otherwise it will cause demoulding. form flash.
When the clamping device of the injection molding machine is not adjusted properly, it will cause unbalanced clamping and insufficient parallelism of the mold itself, which will also cause flashing.
Mold reason
It is generally caused by the unreasonable design of the mold. This problem is difficult to solve, and the Customized Wine bottle cap mold needs to be redesigned.
The phenomenon of plastic shrinkage is mainly due to the shrinkage of the volume, the surface raw materials at the wall thickness are pulled in, and there are concave marks on the surface of the finished product after cooling.
Shrinkage is the most adverse phenomenon that occurs on the surface of the finished product, and most of them occur at the dry wall thickness.
Process method
The injection molding speed and pressure holding time of the injection molding machine are short, which makes the fluidity of the plastic parts insufficient.
The plastic parts entering the mold cavity first cool down quickly, and there is not enough pressure holding time for feeding. The general solution is to use Higher injection pressure.
Mold reason
The ventilation inside the mold of Customized Wine bottle cap is not smooth, which will also lead to excess air in the cavity that cannot be removed.
There is less plastic that needs to be fed, and the shrinkage of the parts is large. The general measures are to maintain and increase the mold. exhaust vent.
