Machines for fasteners and chains

Tecno Impianti S.r.l. designs and manufactures a wide range of machines for fasteners and chains, such as in-line wire drawing machines. The company offers 20 basic models for wires ranging from 3.0 to 38.0 mm, which can be further modified and customized to meet the specific customer requirements. All machines are equipped with a variable-speed drive (Inverter).

In-line wire drawing machines mod. SKP

The SKP series in-line wire drawing machines are horizontal-axis single block units, installed between the pay-off and the next processing machine, such as a cold heading machine, a straightener/cutter, or a bending machine. Their main function is to reduce the wire to the exact diameter required by the specific application. This operation is synchronized with the production machine: a compensating arm (dancer) automatically adjusts the drawing speed based on wire demand. The system also offers a wide range of customized adjustments for optimal process control. Key advantages include:

• material cost savings: by using rod or semi-finished wire instead of drawn wire;
• reduced stock-in-trade: multiple finished wire diameters can be obtained from the same rod diameter;
• improved material workability: the material enters the header slightly warm;
• elimination of aging hardening issues in stainless steel;
• diameter control: immediately before the final component production, allowing for tighter dimensional tolerances;
• improved wire surface: allowing for a clean and lubricated surface, enhancing the quality of the finished product;
• longer tooling life: the wire is drawn just before processing and is free from surface damage caused by handling;
• improved productivity: the header is no longer fed directly by the pay-off, reducing tool wear significantly; different coil sizes no longer affect the header performance and the problem of shorter wire pieces is minimized;
• low operating costs: shared operator with the header, and limited die and lubricant wear and consumption.

Motorized pay-offs mod. AP

The AP series pre-straightener motorized pay-offs are designed to efficiently feed cold heading or wire drawing machines processing wires from 7.0 to 38.0 mm in diameter. Key functions include: pre-straightening and automatic feeding of coiled wire into the next machine, significantly reducing downtime; advancing the wire to the entry rollers of the operating machine, reducing the load on the internal feeding system; and overall optimization of line efficiency.

AP models can be configured with optional accessories, including an enlarged coil arm for heavier coils, a rotating base for easier loading in tight spaces, additional straightening rollers, and an integrated cutter. A double-arm version is also available, ideal for further minimizing downtime: while the first arm is operating, the worker can prepare a new coil on the second; once the working coil is finished, the rotating base enables a quick transition to the next one.

Hydraulic pushers mod. T

The T series hydraulic pushers are ideal for assisting wire insertion into the die when pointing is challenging. Installed in-line with die blocks or in-line drawing machines, they integrate the die holder directly onto the pusher, which feeds the wire through automatic cycles. They can work with powder or oil lubricants and are available in different models, customizable to specific application needs.

Wire introducers and pre-straighteners mod. PR-skp

PR introduction units are installed at the exit of the SKP model in-line drawing machines. Their function is to transfer the wire from the dancer arm to the header's entry rollers, ensuring pre-straightened wire presentation. The entry rollers can be equipped with pneumatic or hydraulic pressure control. The unit can be installed in a fixed position or, upon request, in a retractable or sliding version mounted directly on the machine.

Complete in-line wire drawing plants

For in-line applications with cold headers, straightener/cutters, or chain and medium/large diameter wire machines, Tecno Impianti offers complete wire drawing lines. Each line includes a horizontal motorized AP series pay-off, a T series hydraulic pusher, an SKP series inline wire drawing machine, and a motorized PR-skp introducer. The main advantage is full integration: a single manufacturer is responsible for the entire line and a centralized electrical system with PLC to efficiently coordinate all machines. The result is a highly performing system that combines the technical benefits of each component.

Wire pointing machines mod. AT 

The AT model wire pointing machines are essential for pointing the wire by rolling to enable its insertion into the drawing die. Tecno Impianti provides 9 models covering a diameter range from 1.0 to 20.0 mm:

• AT/3 to AT/10 models are equipped with two horizontal rolling cylinders;
• AT/16 and AT/20 models also integrate two vertical cylinders for more complete processing;
• AT/14 model is available in both two-cylinder and four-cylinder versions.

All versions can be supplied on a fixed base or mounted on a trolley, depending on operational needs.

Wire introduction units mod. INT

The INT model introduction units are designed to feed medium to large-diameter wires in systems with vertical axis pay-offs. They can be installed upstream of in-line drawing machines, cold headers, or die blocks. They are equipped with pneumatically or hydraulically driven entry rollers and manually, pneumatically, or hydraulically adjustable pre-straightening rollers. An integrated cutter at the exit is available upon request.

Vertical motorized pay-offs mod. SVM

The SVM series vertical motorized pay-offs are designed to feed cold headers with wire in coil or bundle form. The welded steel structure supports an adjustable diameter roll holder platform, ensuring internal centering for safe uncoiling. The motor, controlled by an inverter, allows synchronized operation with the downstream header. Since the header operates intermittently and the pay-off continuously, a compensation rod balances the two operating rhythms. The machine includes a wire guiding roller group, an electric panel with LCD display, and CE-compliant safety guards with a maintenance access door.

Coil tilters mod. RB

Designed for safe coil tilting, the RB models allow the insertion or extraction of coils for vertical or horizontal wire handling. Custom-built, they include a 90° tilting platform with centering and locking system, hydraulic system, electric controls (push-button panel or radio control), and safety barriers with photoelectric sensors.

For more information about machines for the fastener and bolt sector and chain manufacturing, please contact Tecno Impianti using the references on this page.