Blowing bottles on site cuts transport cost and gives you control over bottle shape and weight. We supply semi-automatic machines for smaller outputs and high-cavity automatic machines for full production, together with the moulds, high-pressure compressor, dryer and chiller that feed them.
Blowing is where the economics of a PET line are decided, because the machine sets both the bottle cost and a large share of the plant’s electrical load. Output comes from cavities multiplied by cycle time, so a four-cavity machine running a light preform can match a six-cavity machine on a heavier one — compare machines on the bottle you actually intend to sell, not on the cavity count. Preform weight, wall-thickness distribution and the heating profile are what decide whether a bottle passes the top-load and drop tests at the weight your customers ask for.
The machine is only part of the investment. High-pressure air is the single biggest running cost of blowing, which is why an efficient compressor, a refrigerated dryer and a chiller sized to your actual machine matter as much as the blower itself — these are usually quoted separately and are easy to under-specify. If you plan several bottle shapes, budget for one mould per shape and check the changeover time, because short runs are where a slow changeover becomes expensive. For high-output single-format production, a blow–fill–cap block saves floor space and conveying, but it links blowing and filling into one set of mechanical adjustments, so it suits plants with capable in-house maintenance better than a first-time buyer.