In the extrusion blow molding machine industry, choosing the right machine configuration is a critical decision that impacts your factory’s footprint, energy costs, and total output. The debate between single station and double station blow molding machine often comes down to balancing production volume with investment flexibility.

Single Station Blow Molding Machine: Precision and Simplicity

The single station blow molding machine features one mold-clamping unit that moves between the extrusion head and the blowing station.

Best for: Small to medium production runs, large-sized containers (like 30L barrels), and specialized containers that require frequent mold changes.

Advantages:

• Lower Initial Investment: Ideal for startups or testing new product lines.
• Compact Footprint: Takes up significantly less workshop space.
• Ease of Maintenance: Fewer moving parts and simplified hydraulic/electrical systems.

Double Station Blow Molding Machines: Maximizing Output

Double station blow molding machine utilize two clamping units on a single frame, alternating their cycles under the extrusion head (shuttling). While one side is blowing and cooling, the other side is receiving the parison.

Best for: High-volume production (e.g., 100ml to 5L bottles) where speed and unit cost are the primary concerns.

Advantages:

• Double the Production: Achieve nearly 100% higher output than a single station machine with the same container size.
• Better Energy Efficiency per Unit: One extrusion system serves two molds, optimizing the heating energy used for melting the plastic.
• Lower Labor Costs: One operator can monitor a double station machine, effectively managing two production lines simultaneously.

Bestar’s Technical Selection Guide

If your product is a large hollow component with a capacity of 200L or more, single-station blow molding machine with an accumulator head is the only option. However, if you are producing plastic bottles with a capacity of less than 5L and have a stable order volume, double station blow molding machine with a fully digital servo system will be your best solution for achieving a quick return on investment.

FAQ:

Q1: Which blow molding machine is faster, single or double station?

A: A double station machine is significantly faster as it eliminates the “waiting time” for the parison to extrude. While one mold is in the cooling phase, the other mold is being filled, nearly doubling the output per hour.

Q2: Can double station machine run two different molds at the same time?

A: Yes, but with limitations. Both molds must produce containers with similar weights and cooling requirements because they share the same extrusion head and parison speed settings.

Q3: Is a double station machine twice as expensive as single station one?

A: No. While it is more expensive, it usually costs about 1.5 to 1.7 times the price of a single station machine, offering a much better cost-per-bottle ratio for high-volume orders.

About Suzhou Bestar Blow Molding Machinery Co., Ltd:

Beier Group and Bestar company are same owner And Bestar has been established for more than 19years. Bestar provides customers high efficiency, innovative, energy saving blow molding machinery solutions. Bestar blow molding machines sold to more than 60 countries.

Series blow molding machine is used for blowing 100ml-1250L HDPE PE PP products like milk bottles, daily chemical packaging bottles, jerry cans, pesticide bottles / medicine bottles and stacking barrels.

Please write your machine inquire Email, Phone Number and Company Name here, we will respond within 12h. Or you can directly contact us: Email: sales@bestarmachinery.com or at Whatsapp/Wechat +86 18862609888.