How To Choose Between Single And Double-Station Machines

2026-09-21

Single-station and double-station blow molding machines use different molding arrangements to meet different production requirements. Kingplas Machinery selects suitable equipment based on product size, output requirements, material characteristics, mold design, cooling cycle, and production plans instead of choosing equipment only by the number of stations.

How To Choose Between Single And Double-Station Machines-Kingplas Machinery

Single-Station Machines Use One Molding Station:

A single-station blow molding machine completes mold closing, blowing, cooling, and product forming through one molding station. This structure provides a simple production process and suits applications with moderate output requirements or products that do not need a two-station arrangement.

Kingplas provides continuous extrusion blow molding machine models including K2L, K5L, K15L, and K30L. These models cover maximum product volumes from 2L to 30L, with plasticizing capacities from 20 to 180 kg/h depending on the machine model.

Double-Station Machines Improve Production Efficiency:

A double-station blow molding machine uses two molding stations that work alternately during production. This arrangement allows one station to perform molding while the other station completes cooling and product removal, helping improve production efficiency.

Kingplas double-station models include K2D, K5D, K15D, and K30D. The series covers maximum product volumes from 2L to 30L, with listed plasticizing capacities from 45 to 240 kg/h according to different configurations.

How To Choose Between Single And Double-Station Machines-Kingplas Machinery

Production Output Determines Station Selection:

Station quantity is not the only factor that affects equipment selection. Product volume, required output, molding cycle, and production conditions also need to be considered.

For example, in a Kingplas 5L watering pot application, the reference output reaches about 90 pieces per hour with a single-station configuration and about 200–220 pieces per hour with a double-station configuration under specific production conditions.

Actual output may change according to product weight, mold structure, material type, cooling conditions, and process settings.

How To Choose Between Single And Double-Station Machines-Kingplas Machinery

Before selecting the machine configuration, manufacturers should confirm:

Product size and weight: Determines molding requirements and equipment capacity.
Target output: Affects station selection and production speed.
Mold and die-head configuration: Influences the number of products produced in each cycle.
Material characteristics: Determines plasticizing requirements and processing conditions.
Production environment: Includes available space and supporting facilities.

Mold And Die-Head Configuration Affects Capacity:

Station quantity is only one part of blow molding machine selection. Mold cavities and die-head configuration also influence production capacity.

For example, Kingplas uses a K5D-75-3 configuration with triple die heads for a 1L round bottle application. Under the specified conditions, the reference production capacity reaches 720 pieces per hour.

This example shows that production capacity depends on the complete combination of machine structure, die-head design, mold configuration, product requirements, and process parameters.

Different Products Require Different Machine Configurations:

A double-station blow molding machine can support production plans that require higher output through two alternating molding stations. However, a single-station machine can still meet production needs when the required output is lower or the production process is simpler.

Products such as daily chemical bottles, milk bottles, jerry cans, and lubricant bottles may require different machine configurations according to product dimensions, weight, material, and output requirements.

Therefore, manufacturers should start equipment selection from the actual product drawing and production target. More molding stations do not always mean the equipment is more suitable.

How To Choose Between Single And Double-Station Machines-Kingplas Machinery

FAQ:

Q1: What is the main difference between single-station and double-station blow molding machines?

A: A single-station machine uses one molding station, while a double-station machine uses two molding stations that operate alternately.

Q2: Does a double-station machine always produce twice the output?

A: No. Actual output also depends on product weight, mold configuration, die heads, cooling time, material, and process settings.

Q3: Can both configurations produce similar blow molded products?

A: Yes. The suitable configuration depends on product size, weight, material, mold design, and required production capacity.

Q4: What information should be confirmed before machine selection?

A: Product drawings, volume, weight, material, mold requirements, and target output should be confirmed before selecting the machine configuration.

Why Choose Kingplas Machinery?

Has 30 years blow molding experience. Our blow molding machine portfolio is designed to handle a wide range of thermoplastic materials, including HDPE, PP, PE, PVC, PC, and PETG, for containers ranging from 10ml to 1250L.

Automatic Extrusion Blow Molding Machines: High-speed continuous extrusion systems (Single/Double Station) for cosmetics, lubricants, and household chemicals.
Accumulator Head Blow Molding Machine: Robust solutions for large-scale industrial parts, such as 200L drums, IBC tanks, and automotive components.
Multi-Layer Co-Extrusion Technology: Advanced 2-to-6 layer systems that provide superior barrier properties for agrochemical and fuel tank applications.
Turnkey Solutions: Integrated production lines including precision mold design and auxiliary equipment.