Conveyor Screw

The conveyor screw (also called bottle-separating screw or bottle-feeding spiral) is a core bottle-regulating component in automated packaging lines such as filling, labeling and bottle-washing. It is typically used together with a guide plate and an infeed star wheel.

Working Principle: The rotating screw uses its spiral groove to separate the bottles crowded together on the conveyor line one by one and transport them at a fixed spacing, feeding them in order into the star wheel. This ensures bottles enter the filling/labeling stations at precise, equally spaced intervals, solving the problems of bottle stacking and crowding. It is a key bottle-regulating component for continuous production lines. It is widely used in beverage, pharmaceutical, daily chemical and sauce production lines for both glass and plastic bottles.

The conveyor screws are classified by function

Shopping Guide

Variable Lane Screw Can change from single lane to dual lane transportation.	Variable Pitch Screw Can transport items with a specified pitch as needed.	Rotating Screw Can rotate materials to a certain angle during transportation, typically for 90-degree rotations.
Long-distance Conveyor Screw Enables long-distance transportation with the ability to change pitch and angle as required.	Feed Screw Generates thrust to push materials within a sealed chamber using the rotating screw.	Bottle grouping screw Groupcontinuous single-row bottlesinto fixed quantities in sets.

1. Screw conveying generates complex frictional thrust that varies with speed; rich design experience and experimental data are required to ensure smooth high-speed performance for different conveying needs. It is best to communicate and confirm with our engineers before processing.
2. We are responsible only for machining the plastic part of the screw and the matching steel shaft. Assembly dimension requirements with other products must be provided in advance to avoid assembly errors.
3. Different materials have different physical properties; please choose the material correctly according to the working conditions.
4. Plastic parts have a relatively large coefficient of thermal expansion and will deform with temperature changes; proper allowance should be reserved.
5. The machining tolerance of the screw is generally ±0.1 mm.
6. Processing according to drawings and processing from samples are both supported.

Factory covers an area of ​​20,000 square meters, is equipped with 150 production units, and has an annual output exceeding 10,000 tons, enabling end-to-end production ranging from engineering plastic raw materials to finished machined parts.

1. Do you use brand-new raw material for plastic custom parts?
Yes. We adopt 100% virgin raw materials (UHMWPE, MC Nylon, POM, PTFE etc.) for CNC machined plastic components, recycled materials are not used unless specially agreed by customers.
2. Can you custom-make plastic parts according to our requirements?
Yes. We provide custom CNC machining service. We can produce parts based on your 2D/3D drawings, physical samples or detailed specifications.
3. What information do I need to provide to get a quotation?
To offer you an accurate quotation, please supply:
2D / 3D CAD drawings (STEP, IGES, PDF preferred) OR original physical samples
Material requirement (UHMWPE / MC Nylon / POM / PTFE etc.)
Dimension tolerance & surface finish requirements
Quantity
Working condition (temperature, contact media, speed etc.)
4. What are your MOQ and production lead time?
MOQ is flexible, we support small-batch & prototype orders.
For simple custom parts: 7–10 working days; Complex / large-size custom parts: 10–15 working days.
5. Can you provide material test certificates?
Yes, we can provide material property certificates. Third-party inspection like SGS is acceptable upon your request.
6. What price terms and payment methods do you accept?
Price terms: EXW, FOB, CIF, CFR, DDP.
Payment terms: Normally 30% deposit, 70% balance before shipment by T/T.