Automatic Screw Making Production Line (Straightening, Cold Heading, Thread Rolling, Inspection) | FFI, Hefei, China

Screw Making Production Line

Fine Fasteners Industry (FFI): Hefei, Anhui, China

Integrated line that makes finished screws from wire rod in one continuous flow: straightening, servo cold heading, thread rolling, and automatic optical sorting, at up to 250 pieces per minute with a 25-minute changeover.

The Screw Making Production Line combines four processes into one automatic flow: wire feeding and straightening, cold heading, thread rolling, and on-line inspection. Wire rod is fed through a 9-roller straightening system that relieves stress, then cut and head-formed by a multi-station cold heading machine. The threads are rolled by thread rolling equipment, and an optical vision system sorts out defective screws, such as those with cracks, thread flaws, or dimensional errors. Good screws come off ready for packing, and FFI describes the line as able to run unattended.

FFI says the line uses servo direct-drive cold heading, with independent force control at each station, and a hydraulic synchronous compensation system to avoid broken and overlapping threads. A closed-loop vision system samples products every 50 pieces and adjusts feeding and forming parameters automatically if it detects drift.

The line is designed for quick changeovers: to change the screw specification, the operator swaps the cold heading die core and the thread rolling plates, and sets the parameters from the touch screen. FFI says this takes no more than 25 minutes, so the line can handle small batches of self-tapping screws, machine screws, and non-standard parts.

Why Choose an Integrated Screw Line?

Separate cold heading and thread rolling machines need operators, transfer, and sorting between them. An integrated line removes those handling steps, and catches defects before they leave the line.

• One continuous flow. Wire rod to finished, inspected screws.
• Automatic quality control. Optical inspection removes defective screws, and a closed-loop system corrects drift.
• Quick changeover. FFI states 25 minutes between screw specifications.
• Low labour. FFI says one operator can look after three lines.
• Condition monitoring. A mould life prediction module monitors vibration and impact data to warn of mould failure before it happens.

Machine Specifications

The page gives no specification table. The following are the figures FFI states in its description:

• Processes: wire feeding and straightening, cold heading, thread rolling (and tapping, as listed), and on-line optical inspection
• Straightening: 9-roller system
• Cold heading: multi-station, servo direct drive
• Maximum output: 250 pcs/min
• Head diameter tolerance: ±0.02mm (FFI claim)
• Dimensional drift: within 0.005mm over 12 hours of continuous running (FFI claim)
• Inspection sampling: every 50 pieces, with automatic parameter correction
• Changeover time: no more than 25 minutes (swap of cold heading die core and thread rolling plates)
• Workshop noise: below 78dB (FFI claim)
• Oil mist recovery: fitted
• Control: HMI touch screen

Not stated: wire diameter range, screw size range, length range, motor power, power supply, machine dimensions, weight, and number of heading stations.

Condition Available: New

Key Features

• Four processes in one line: straighten, head, roll, inspect
• Servo direct-drive cold heading with independent force control per station
• Hydraulic synchronous compensation to prevent thread defects
• Optical vision sorting for cracks, thread flaws, and size errors
• Closed-loop vision control sampling every 50 pieces
• Mould life prediction with pre-alarm
• Oil mist recovery and low-noise design
• Quick-change module and touch-screen parameter setting

Applications

• Production of self-tapping screws and machine screws
• Non-standard and customised screws
• Small and medium fastener factories and distributors making their own product

Who This Machine Is For

• Fastener manufacturers wanting automatic, inspected screw production
• Producers with many screw specifications and frequent changeovers
• Factories aiming to cut labour and scrap

Frequently Asked Questions

What does the line do?
It turns wire rod into finished screws automatically: straightening, cold heading, thread rolling, and optical inspection.

How fast does it run?
FFI states a maximum output of 250 pieces per minute.

How long does a changeover take?
FFI says no more than 25 minutes, by swapping the cold heading die core and thread rolling plates.

How are defects handled?
An optical vision system automatically sorts out screws with cracks, thread flaws, or dimensional errors.

What screw sizes can it make?
The page doesn't say. Please contact the supplier with the diameter, length, and material of the screws you want to make.

Is it CE compliant?
FFI says the line complies with EU CE environmental and safety standards. Please ask for the certificate.

Is financing or staged payment available?
Yes. A deposit secures your order and begins production, with the remaining balance due only once your machine has been built, inspected, and is ready to ship.

Should I buy new or used?
This line is available new, built to order.