Views:6 Author:Site Editor Publish Time: 2018-05-30 Origin:Site
Uzbekistan is a landlocked country in central Asia, bordering on the Aral Sea in the northwest and bordering Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan and Afghanistan.
Recently,Uzbek customers came to our factory to learn more preform making line. We provide a series of product lines such as water&juice filling machine line etc., which including preform making line.
Preform is a prototype before molding plastic bottles, the wall thickness, high transparency, it also can use common plastic bottle cap seal, coupled with the advantages of breaking is not broken, can stand on the table, you can do a lot of replacing the purpose of the test tube.
The Preform is usually shaped with a hot runner mould. It is best to have a heat shield between the mould and the injection molding machine template. Its thickness is about 12mm, and the heat shield plate must be able to withstand high pressure. The exhaust must be sufficient to avoid local overheating or fragmentation, but the depth of its vent should generally not exceed 0.03mm, otherwise it is easy to produce flying edges.
The production process of preforms
The quality of the bottle depends on the quality of the supplied preforms. The injection molding of the preform can be divided into two types: one is long gate and the other is short gate. Domestic preforms manufacturers choose the short gate of more preforms, while foreign countries choose the long gate more. Long gate preform due to cut off at the bottom of the gate, uniform tension distribution in the process of bottle blowing, blow a bottle of quality will be better, also can cut off part of the recycling, it helps to save raw material costs, in today's increasingly scarce oil resources, domestic manufacturers will be more inclined to long preforms. The quality control of the bottle preforms in the process of production depends on the degree to which the preforms can avoid being scratched in the process of transportation.