ALFATECH S.r.l.

Via Lecco, 12 , 21049 Tradate (VA)
Italy

Telephone +39 0331 814970
Fax +39 0331 814982
info@alfatech-it.com

Trade fair hall

  • Hall 16 / E68
 Interactive Plan

Hall map

K 2016 hall map (Hall 16): stand E68

Fairground map

K 2016 fairground map: Hall 16

Our range of products

Product categories

  • 03  Machinery and equipment for the plastics and rubber industries
  • 03.02  Machinery and plant for processing
  • 03.02.001  Extruders and extrusion lines
  • 03.02.001.01  Extruders
  • 03.02.001.01.01  Single screw extruders
  • 03  Machinery and equipment for the plastics and rubber industries
  • 03.02  Machinery and plant for processing
  • 03.02.001  Extruders and extrusion lines
  • 03.02.001.01  Extruders
  • 03.02.001.01.02  Twin screw extruders
  • 03  Machinery and equipment for the plastics and rubber industries
  • 03.03  Post processing machines and downstream equipment
  • 03.03.005  Winding equipment

Winding equipment

  • 03  Machinery and equipment for the plastics and rubber industries
  • 03.08  Ancillary equipment
  • 03.08.007  Melt pumps

Melt pumps

Our products

Product category: Single screw extruders

GEAR BOXES FOR SINGLE SCREW EXTRUDERS

ALFATECH PRODUCTS: TECHNOLOGY IN THE VAN

ALFATECH’s long experience in special reduction gearing boxes for single-screw extruders is born from the studies and research carried out on particular capacity and application problems in co-operation with leading National and International manufacturers of extrusion and coextrusion systems for plastic materials. Innovative project and construction concepts distinguish this new series. Thorough working specifications and dimensional control methods, as well as strict selection of the materials used have developed absolute reliability. This essential condition is required by the technological specifications defined during the project and confirmed by the relevant complex calculations made by RIDEST to simulate the operative environment of each reduction gearing. RIDEST under Windows is available on request. The software will select the most suitable reduction gearing and define the working conditions for the following:

Loading capabilities Gear service factor according to the A.G.M.A. 218.01 standards and relevant specifications regarding control calculation of the bending stress at the basis of the teeth and of the specific face pressure. Other special algorithms are also applied to determine the geometrical factors defining correct toothing mathematically; gear efficiency; thermal capacity; heat transfer.

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Product category: Twin screw extruders

GEAR BOXES FOR TWIN SCREW EXTRUDERS

With the same schedule and technological method used in the building of gearboxes for single screw extruders, ALFATECH has produced also the line of gearboxes for twin screw extruders, characterized by the kinematic disposition of the gears, which drive the inside screw (motor side) such to cancel the dynamic radial loads caused by the same gears and to increase the bearings life. Consequently this condition implicitly gives the possibility to operate also with high speed of the screw.

Loading capabilities • Gears service factor according to the A.G.M.A. 218.01 standards and relevant specifications regarding control calculation of the bending stress at the basis of the teeth and of the specific face pressure. Other special algorithms are also applied to determine the geometrical factors defining correct toothing mathematically; • gear efficiency; • thermal capacity; • heat transfer.

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Product category: Winding equipment

M1200TA

HIGH-SPEED AUTOMATIC SINGLE AND DOUBLE CUT WINDER FOR THIN FILM EXTRUSION SYSTEMS

Construction characteristics: The steel structure is electrically-welded and consists of two robust shoulders rigidly connected by the base and by suitable bars. The shoulders support all the moving parts including the 2-shaft turret rotation controlled by separate motors. Turret rotation and its perfect positioning are guaranteed by a system compensating any insertion and coupling gap to the special DC motor-regulator.

Air expansion of chuck is automatic on the winder and is guaranteed by pressure control before rotation. The lower cutting system is characterised by a number of lever mechanism actuated by air cylinders and electrically controlled rolls; this guarantees excellent positioning and avoids tie effects. A series of long air-controlled double-bladed knives see to trimming and to lengthwise cutting. Their traverse positioning is hand-operated and eased by a millimetre rod. A powered PLC controlled positioning system is available on request. Two fixed-curve and variable-position bow rolls are situated before and after the lengthwise cutting system; both rolls are electrically controlled. The lay on roll to the winding chuck is made of steel and coated by special rubber; rotation is controlled by a DC motor axially coupled in direct mode, while two other DC motor-regulators independently control pressure on the roll, thus allowing differentiated pressure operation at both ends. Furthermore, gap operation for particular types of materials is also possible.

Control of film pulling tension is based on the processing of the signals generated by pressure and positioning transducers of the dancer roll unit situated in front of the winder and by the load cells positioned near the chuk lay on rolls. Finally, the winder is fixed to the floor and any traverse oscillation of the film must be assigned to a powered device with rotary-frame and fixed centre positioner, mounted before the winder..

Control module: The winder automation is entrusted to a suitable PLC, which controls and handles speeds, pull tensions and positioning in the necessary sequence and safety guaranteed by the special management software. The control module consists of a unit containing the automation power and control and by an operating panel.

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About us

Company details

Alfatech S.r.l. was born in 1989 thank to its founder Mr. Luigi Macchi (1941-2008): he was a great connoisseur and scholar in the world of the calculations for gears, participant to the International Working Group held in Cologne in June 1974, (Working Group ISO / TC 60 / WG 6) where the procedures related to development and standardization in the field of gears were completed, including terminology, nominal dimensions, tolerances and tools for production and control.

Tools machines

Our fleet, always up to date with new generation machines and a careful control of the production process, allows us to ensure an higher and higher quality for a increasingly demanding market, (90% of the work is done inside the company): from the design of the simple part to its production in tools machines and its dimensional verification.

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