DA 20 – Packaging machine for small bags from 500 g to 1.500 g,
for low production rates

BAG MAGAZINE

• quick, easy adjustment;
• convenient refilling;
• capacity 300/350 bags;
• magazine empty alarm;
• can be refilled without having to stop the machine.

4-STATION CAROUSEL

• operated by mechanical cams;
• die-cast aluminium head, completely enclosed to guarantee hygiene and prevent dust from reaching the mechanisms (1);
• bag presence sensor (no bag - no fill);
• top edge of bag supported by suction pumps connected to vacuum pump (2);
• dust extraction hoods (2);
• vibration table (2).

Bags rest on a vibrating table.
The vibration stroke can be adjusted to requirements.

HOT-MELT GLUE CLOSURE

The filled, vibrated bags are conveyed step-by-step in a straight line to the glue closing station.
The following are performed in sequence:

• trimming of top edge (3);
• double folding of edge (3);
• application of hot-melt glue by a rotary disc distributor (4);
  as an alternative, for special requirements and applications, a spray module for hot-melt glue application is installed;
• pressing of sides (and top for flat-top closure) to create a compact, properly squared bag (5).

WELDED CLOSURE

As alternative to glue closure, welding can be used (bags in weldable material).

Bags are conveyed, step-by-step, to the welding station, upstream of which the top edge of the bag is trimmed.

The welder, with heated bars controlled by thermostat or with on-off operation, is pneumatically operated.

Welding temperature and time are fully adjustable parameters.

STITCHED CLOSURE

After packaging, bags are removed from the carousel for closure by stitching. The packaging machine is combined with the model LCS stitching system and is available in the following versions:

• SC: SC: single seam;
• CR: seam with fold;
• CC: seam with crepe paper.

CONTROL BOARD

The push-button control board is structured to ensure user-friendly operation of the packaging line.
There is also an operator interface for access to the machine settings and alarm messages.

ELECTRICAL PANEL

The electrical panel is integrated into the machine, completely connected and with easy access.
Operating control is via PLC.
The standard degree of protection is IP 54.

VERTICAL AUGER BATCHER FOR POWDERS

• container in AISI 304 stainless steel;
• motor-driven internal stirrer;
• speed control system using encoder;
• speed control with variable-frequency drive;
• pneumatically operated shut-off gate valves;
• dust extraction intake at discharge outlet;
• rapid system for batching auger change (quick coupler).

SWINGING CUP BATCHER FOR GRANULAR PRODUCTS

• 2 cups in AISI 304 stainless steel;
• cup volume adjust with electric remote control (motor + encoder);
• discharge hatches with return spring;
• swinging motion powered by motor with variable-frequency drive for perfect synchronisation with packaging speed;
• single discharge chute in AISI 304 stainless steel;
• dust extraction intakes.

INLINE WEIGHING UNITS

For applications which require weighing (powder detergents, tea, biscuits, short pasta shapes, etc.) the packaging machine can be combined with one or more NE model net weight inline weighing units.

MODEL F/70 BUNDLER

The bundler groups bags into bundles and wraps them with shrink-wrap film.

Suitable for bundles of sizes:

It is equipped with:

• pneumatic pushers for bundle formation;
• bag flow monitoring system with photocells;
• stand for the 2 reels of film for wrapping;
• thermostat-controlled welder and cutting blade for wrapping film;
• perimeter guards.

It is available in single input version (6 and 7).

Bundling programs are always custom-created and can manage one or more sizes, selected with just a switch.

MODEL F/70 HEAT-SHRINKING OVEN

After wrapping with film, the bundle undergoes heat-shrinking in the oven.

The metal mesh conveyor (with adjustable speed) carries the bundles through the heatshrinking chamber.

It is heated by electrical elements and has forced-air ventilation.

The chamber is insulated with rock wool.

Bundles leaving the oven are cooled by an electric fan and conveyed onto a parking roller way.

WEIGHT CHECKING, FEEDBACK AND OUT-OF-TOLERANCE BAG EXPULSION

Application of the “weight checking” system provides continual monitoring of the weights produced, plus:

• expulsion of bags with weight outside the tolerance range;
• display of current weight;
• setting and recall of different sizes (up to 9);
• display of last 20 weights checked for each batcher;
• average weight calculation;
• display of counts of in-tolerance, minor out-of-tolerance and rejected major out-of-tolerance bags;
• feedback to batcher for automatic adjustment of weight in case of drift.

The system comprises:

• weighing belt (on load cell);
• analogue digital hardware system;
• custom software program.

The system is installed at the line exit, immediately downstream of the closing area.

METAL DETECTOR

Main constituent parts:

• motorised conveyor belt specially designed to prevent magnetic interference with the detector coil (conveyor at least 2250 mm long, depending on bag passage opening);
• detection system;
• electronic terminal installed on the detector coil structure;
• standard bag passage opening 300 (h) x 700 (l) mm (larger or smaller sizes are available);
• Ethernet interface.

General characteristics:

• automatic self-calibration function with cycle programmable from keyboard;
• scanning field adjustment;
• automatic compensation of sensitivity level in relation to variation in product humidity percentage;
• events log displayable on local control panel (or transferable via Ethernet) including:
  - current date
  - last reset date
  - total bags inspected
  - total bags rejected;
• protection class IP 69;
• MD system + terminal constructed in AISI 304 stainless steel;
• visual and acoustic alarm for out-of-tolerance bags;
• remote connection for bag ejector.

DATE / CODE STAMPING SYSTEM

For basic marking (date or code), an “ink pad” date stamping system is available.

Effective and efficient, it is installed at the closing system exit in a single arrangement.

Inkjet date / code printing units are also available.

LABELLING UNIT

After closing, an adhesive label can be applied as an anti-tamper measure.

The device comprises:

• reel stand (for label backing film);
• device which separates the label and rewinds the backing film;
• pneumatic label application device.

SIZE CHANGE

Packaging machines can be used for multiple sizes. In this case, the packaging machine must be equipped with the relative size change accessories.

Size change procedures are simple mechanical operations which can be performed by unskilled workers trained for this task.

Estimated size change time:
1.5 hours approx.

SIFTER (FOR FLOUR SAFETY)

This machine guarantees perfect separation of product granules by means of the centrifugal motion of the machine and its internal drum.

The drum may be in stainless steel or nylon depending on the required particle size and flow rate and the various models can be equipped with blades or shakers.