Blow mold design summary, blow mold exhaust method brief introduction
There are many kinds of mold design, and the exhaust method is not the same. The exhaust of each mold design is different, but the purpose is only one, that is, the exhaust. If you know the principle and learn how to exhaust, it will get twice the result with half the effort.
Exhaust method of blow molding mold:
A. An exhaust groove can be set on the parting surface. The width of the exhaust groove is 10 ~ 20 mm, the depth is 0.030 ~ 0.05 mm, and it is processed by grinding and milling. In the plane part of the exhaust, can use the porous metal made by copper powder metallurgy method to exhaust,
B. Open the exhaust hole in the plane part. First drill a hole with a diameter of about 10mm, and insert the cylindrical pin with a diameter of 0.1-0.2mm grinding on both sides into the hole. Using the gap between the formed pin and the hole to exhaust, will not leave marks on the plastic parts.
C, the way to open the vent in the corner and the shoulder, the diameter of the vent is about φ0.1 ~ φ0.3 mm, after blowing molding will not leave traces to the plastic parts. D. The exhaust gap of embedded parts can also be used for exhaust, such as setting a very small gap at the head and bottom of the bottle.