Container Infeed Starwheel for High-Speed Rotary Bottle Filling Machines

Product Specifications

Technical details and manufacturing context for Container Infeed Starwheel

Definition

The Container Infeed Starwheel is a critical component of High-Speed Rotary Bottle Filling Machines. It receives containers from an infeed conveyor, accurately spaces and orients them, and gently transfers them onto the machine's main rotary platform or carousel for subsequent filling, capping, and labeling operations. This component ensures smooth, continuous, and high-precision container handling at production line speeds.

The starwheel is designed to match the container's profile, with pockets that capture each container as it enters. It rotates synchronously with the main carousel, precisely timing and spacing containers to prevent tipping or jamming. The starwheel is available in various configurations to accommodate different container diameters (50–120 mm), heights (100–350 mm), and pitch diameters (600–1200 mm). The number of pockets ranges from 12 to 48, and rotation speeds can vary from 10 to 60 rpm. Positioning accuracy is critical, typically within ±0.05 mm.

Materials commonly used include stainless steel (304, 316L) and engineering plastics such as Acetal or UHMW-PE. Surface finishes range from Ra 0.4 to 0.8 μm to prevent scratching and bacterial buildup. Operating temperatures range from -10°C to 60°C, and ingress protection ratings from IP54 to IP65 for washdown environments. The weight of the starwheel can range from 50 to 200 kg, depending on diameter and material thickness.

For specific applications, it is essential to verify model-specific values and standards with the legal manufacturer or supplier. The starwheel must be selected based on container dimensions, production speed, and environmental conditions. Regular inspection for wear and proper alignment is recommended to maintain performance and avoid downtime.

Working Principle

The starwheel rotates synchronously with the main machine carousel. Its star-shaped pockets are designed to match the container's profile (e.g., bottle neck, body). As containers enter from the infeed conveyor, the rotating starwheel captures each one in a pocket. The rotation precisely times and spaces the containers, transferring them onto the lugs or pockets of the main filling machine carousel at the transfer point, ensuring no container tipping or jamming.

Common Materials

Stainless Steel (e.g., 304, 316), Engineering Plastic (e.g., Acetal, UHMW-PE)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Container Diameter Range	50–120 mm	Outside this range, starwheel pockets must be custom-machined.
Container Height Range	100–350 mm	Height adjustment may be required for different bottle sizes.
Pitch Diameter	600–1200 mm	Determines the starwheel's overall size and infeed pitch.
Number of Pockets	12–48	More pockets increase throughput but require larger diameter.
Rotation Speed	10–60 rpm	Higher speeds may require dynamic balancing.
Positioning Accuracy	±0.05 mm	Critical for smooth transfer to filling machine.
Material	304/316L	316L for corrosive or high-hygiene environments.ASTM A240
Surface Finish	Ra 0.4–0.8 μm	Smooth finish prevents container scratching and bacterial buildup.ISO 4287
Operating Temperature	-10–60 °C	Above 60°C, material expansion may affect clearance.
Ingress Protection	IP54–IP65	IP65 for washdown environments.IEC 60529
Weight	50–200 kg	Depends on diameter and material thickness.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Starwheel Body
Main structural disc with machined pockets that hold and transport containers.

Material: Stainless Steel or Machined Aluminum
Pocket Inserts Part
Removable liners or guides inside pockets to match container contour, reduce wear, and allow changeover.

Material: Engineering Plastic (Acetal, UHMW-PE) or Stainless Steel
Drive Hub Part
Central mounting point that connects the starwheel to the machine's drive shaft for rotation.

Material: Steel
Guide Rails Part
Stationary curved rails that help guide containers into and out of the starwheel pockets smoothly.

Material: Stainless Steel

Manufacturers of Container Infeed Starwheel

Manufacturer profiles associated with Container Infeed Starwheel.

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Frequently Asked Questions

What is the primary function of a container infeed starwheel?

It receives containers from an infeed conveyor, spaces and orients them accurately, and transfers them onto the main rotary platform of a high-speed bottle filling machine, ensuring smooth and precise handling.

What materials are commonly used for starwheels?

Common materials include stainless steel (304, 316L) and engineering plastics such as Acetal or UHMW-PE. The choice depends on the application, including hygiene requirements and container type.

How do I select the right starwheel for my filling machine?

Selection is based on container diameter (50–120 mm), height (100–350 mm), pitch diameter (600–1200 mm), number of pockets (12–48), and rotation speed (10–60 rpm). Verify these parameters with the machine manufacturer.

What maintenance is required for a starwheel?

Regular inspection for wear, proper alignment, and cleanliness is recommended. Check for any deformation or damage to pockets, and ensure the surface finish remains smooth to prevent container scratching and bacterial buildup.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Atmospheric (non-pressurized system component)
other spec:	Container feed rate: 50-1500 containers per minute (typical range for rotary fillers)
temperature:	-10°C to 80°C (operational range, typical for food/pharma applications)

Container Infeed Starwheel

Product Specifications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards