A. No flash during the molding process, low post-processing cost •
The mold clamping accuracy of the injection blow molding machine is
extremely high, and the pressure control in the injection and blow
molding stages is precise, so the product is almost free of flash
and burrs after molding. Compared with the extra material edges
that may be generated by the traditional step-by-step process,
there is no need for additional post-processing procedures such as
trimming and grinding, which not only saves manpower and time
costs, but also avoids damage to the surface of the product during
post-processing (such as scratches and deformation). • This feature
is particularly important for products with strict appearance
requirements (such as cosmetic bottles and high-end food
packaging), which can directly improve the product's factory
qualification rate.
B. Complex bottle mouth structure can be formed in one step • For
products with anti-theft rings, scale lines, and special-shaped
bottle mouths (such as bayonet mouths and spiral grooves), the
injection blow molding machine can directly integrate these
structures into the preform during the injection molding stage, and
retain them completely after blow molding without the need for
secondary processing. • For example, the aluminum cap of the
medicinal vial with the bayonet mouth and the anti-theft thread of
the beverage bottle can be formed in one step by the injection blow
molding machine to ensure structural accuracy and sealing, while
the step-by-step process may require additional bottle mouth
processing steps, increasing the risk of error.
C. Refined temperature control, adaptable to special materials •
The injection blow molding machine is equipped with a multi-stage
heating system (such as barrel segment heating, mold temperature
control), which can accurately adjust the temperature according to
the melting characteristics of different plastic materials (such as
melting point, fluidity). For example, when processing PET, the
crystallization speed needs to be controlled, and when processing
PP, it is necessary to avoid degradation caused by local
overheating. The temperature control accuracy of the injection blow
molding machine (usually ±1°C) can meet these special requirements.
• For modified plastics (such as materials with added glass fiber
and flame retardants), stable temperature control can reduce
material performance fluctuations and ensure the mechanical
strength and weather resistance of the products.
D. Fast mold change design, adaptable to multi-variety production
• Modern injection blow molding machines generally use fast mold
change systems (such as hydraulic clamping, positioning pin fast
docking). When changing molds of different specifications, the
downtime can be shortened to less than 30 minutes, which is much
lower than the 1-2 hours of traditional equipment. • This feature
is suitable for production scenarios that require frequent
switching of product models (such as multi-specification packaging
bottles of cosmetic companies and different dosage bottles of
pharmaceutical companies), which improves the flexibility of the
production line.
E. Better environmental protection, in line with green production
standards • In addition to the high material utilization rate
mentioned above, the power system of the injection blow molding
machine (such as servo motor) has lower energy consumption, and
less waste gas and waste material emissions during the production
process (no flash waste, low material loss). • Some equipment can
also be equipped with a recycling system to crush a small amount of
unqualified products and then re-mix them into the raw materials
(must meet the material characteristics) to achieve recycling,
reduce plastic pollution, and meet the "dual carbon" goals and
environmental protection regulations.
F. Suitable for the production of thin-walled products and reduce
material costs • With precise injection pressure and blow molding
tension control, the injection blow molding machine can produce
hollow products with thinner wall thickness (such as 0.3-0.5mm),
greatly reducing the amount of material while ensuring strength. •
For example, small beverage bottles, sample trial containers, etc.,
the injection blow molding process can save 10%-15% of plastic raw
materials compared to traditional processes, and the cost advantage
is significant in long-term mass production.
