They may be more substantial in whether clamp and stretch rod are powered by cams, hydraulics, pneumatics, or electrics. They may be as subtle as what mechanism (timer or position switch or both) is used to strengthen the low and high pressure blow air. After blowing, all bottles are sent to a stand-up conveyor.ĭifferent supplier, different machines. Some machines be equipped with more controlls in this area by allowing certain functions to be energized seperately. Numbers of stretch rods and blow valves usually are tied together, all move or open at the same time. All blow molds are on the same platen and move together. Linear blow molding machines often index the preforms when they travel through the oven system: 2, 4, 6, or 8 preforms are all loaded, then index one position, stop, index again and so on… Once they leave the oven section the same number of preforms was loaded at the beginning, and enters the blow molding clamp area together. Each preform is blown in a single blow mold with its own stretch rod and set of blow valves. The preforms never stop on their way from the entrance to the exit conveyor. Many functions on the machine are driven by cams. Rotary blowing mold machine features the concept of continuous motion. In the end, upright containers leave on a conveyor. The same is they accept injection molded preforms, reheat them in an oven system with preforms spinning on mandrels or spigots, then bring them into blow molds to be stretched and blown. Linear blow molding machine or Rotary blow moulding machine, what should I choose, that is a big question! Now, Tina will tell you the same and the difference of these two type.
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