Pet preform is the prototype of the bottle before it is formed. Its tube wall is thick and transparent, and it can be sealed with a common plastic bottle cap. In addition, it can not be broken and can stand on the table. It can be used to replace test tubes. The hot runner mold is usually used for the molding of bottle embryo. It is better to have a heat insulation board between the mold and the mold plate of the injection molding machine, with a thickness of about 12 mm, and the heat insulation board must be able to withstand high pressure. The exhaust must be sufficient to avoid local overheating or fragmentation, but the depth of the exhaust port should not exceed 0.03mm, otherwise it is easy to produce flash.
For the production process of bottle embryo, the quality of bottle depends on the quality of bottle embryo supplied. There are two kinds of injection molding of bottle embryo, one is long rubber port, the other is short rubber port.
Post time: Dec-17-2020