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No.26 Longhe Road, Longhu High-tech Development Zone, Huaibei City, Anhui Province, P.R.China
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The semi-automatic bottle blowing machine is a medium & small-sized hollow container forming equipment designed for PET, PP and other plastic preforms. It realizes forming through manual feeding, mechanical heating and high-pressure air blowing. Compact in structure, easy to operate and cost-effective, it relies on manual loading of preforms and unloading of finished bottles to complete the full processes including heating, stretching, blowing and cooling setting. It mass-produces various hollow plastic containers such as mineral water bottles, beverage bottles, edible oil bottles, daily chemical bottles and pharmaceutical bottles. Tailored for small and medium-sized processing plants with small-batch and multi-variety production demands, the machine features convenient commissioning, low energy consumption and simple maintenance, serving as common basic forming equipment for bottled beverage, daily chemical and chemical packaging industries.
The machine adopts the two-step blow molding process. Firstly, injection-molded preforms are manually loaded into the heating oven and evenly heated by infrared lamps to reach the softening forming temperature. The heated preforms are then manually transferred into the clamping mold, followed by mold closing and locking. Afterwards, a mechanical stretching rod stretches the preform downward; meanwhile, high-pressure compressed air is blown inward to expand the softened preform evenly against the inner cavity of the mold. After rapid cooling and shaping via air or water cooling, the mold opens and finished bottles are manually ejected to finish one complete blowing cycle.
Forming is achieved purely by thermal plastic deformation and high-pressure inflation without any chemical additives. The finished bottles feature uniform wall thickness and regular shape.
Equipped with an infrared constant-temperature heating oven with multi-zone independent temperature control. Operators can separately adjust the temperature of upper/lower and front/rear zones to ensure even heating across the entire preform, avoiding local over-melting or insufficient hardening, and meeting heating requirements for preforms of different specifications and materials. Thermal insulation protection structure is integrated for safe and energy-saving operation.
Consists of mold-clamping hydraulic cylinder, mold fixing plate, custom bottle molds and guiding assemblies. It delivers stable clamping force and smooth mold opening and closing. Molds can be rapidly swapped according to product dimensions to produce bottles of different volumes. High-precision molds ensure smooth parting lines free of burrs on finished products.
Comprises stretching cylinder, stretching rod, high-pressure blowing valve and air pressure stabilizing assembly. It precisely controls stretching stroke and blowing pressure for uniform bottle stretching and blow molding. Stable high-pressure air circuit guarantees full bottle shape and qualified mechanical strength.
Adopts combined pneumatic and hydraulic driving. Mold closing, stretching and blowing actions run smoothly and controllably with low operation noise and fast response, suitable for long-duration continuous operation.
Equipped with a simple electric control panel and push-button control system. Temperature, time and pressure parameters can be manually adjusted and set with intuitive operation logic that new operators can master quickly. Emergency stop, overload protection and safety interlock switches are installed to guarantee operational safety.
Internal cooling channels are embedded inside molds, matched with forced air cooling devices to rapidly cool and shape molded bottles, shorten molding cycle, boost production efficiency and prevent bottle deformation and shrinkage.
Manual feeding → Infrared constant-temperature heating of preforms → Manual transfer into molds → Mold closing and locking → Mechanical stretching → High-pressure inflation → Cooling & shaping → Mold opening → Manual bottle unloading → Finished product collection, running in cycles for continuous production.
Manual auxiliary operation lowers equipment cost and floor space occupation; no complex automatic auxiliary devices are needed, cutting upfront investment.
Compatible with PET/PP containers ranging from 50 ml to 20 L. Mold replacement is straightforward to support flexible multi-product and small-order production.
Simplified electric control system delivers low failure rate and convenient troubleshooting with low routine maintenance cost, requiring minimal technical expertise from operators.
Zoned temperature control and pressure-stabilized blowing ensure uniform bottle wall thickness and reliable sealing performance with high finished product yield.
Energy-saving design for the heating system and intermittent working mode reduce power consumption compared with fully automatic blowing machines.
Widely deployed in food & beverage, purified water, fruit juice, sauce, daily care, disinfectant, pesticide & chemical, pharmaceutical packaging and other industries for manufacturing various hollow plastic packaging bottles. It is especially ideal for small and medium-sized factories, workshops, start-up enterprises and scenarios requiring multi-variety, small-batch production.
