DA 40 – Packaging machine for small bags from 500 g to 5 kg
for medium production rates

MAIN DRIVE UNIT

• mechanical cam type;
• force-feed oil lubrication (with electric pump).

BAG MAGAZINE

• quick and easy to adjust;
• convenient to refill;
• 300/350 bags capacity per magazine;
• empty magazine alarm;
• can be refilled without having to stop the machine.

8-STATION CAROUSEL

• grease-immersed lever mechanisms to minimize maintenance;
• operated by mechanical cams;
• die-cast aluminium head, completely enclosed to guarantee hygiene and prevent dust from reaching the mechanisms;
• bag presence sensor (no bag - no filling);
• top edge of the bag supported by suction cups connected to the vacuum pump;
• dust extraction hoods.

STITCHED CLOSURE

After packaging, bags are evacuated from the carousel for closure by stitching.
A clamp presses the top edge of the bag and conveys it to the entry of the stitching head.
The packaging machine is combined with the model LCS stitching system and is available in the following versions:

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

HOT-MELT GLUE CLOSURE

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

• trimming of the top edge (1);
• double folding of the edge (1);
• application of hot-melt glue by a rotary disc distributor (2);
• as an alternative, for special requirements and applications, a spray module for hot-melt glue application is installed;
• pressing of the sides (and top for flat-top closure) to create a compact, properly squared bag.

VIBRATION TABLE

The bags rest on a vibrating table.
The vibration amplitude and frequency can be adjusted to meet different needs.

WELDED CLOSURE

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

The bags are welded prior to being evacuated from the carousel.

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

Welding temperature and time are fully adjustable parameters.

ELECTRICAL PANEL

The electrical panel is integrated on board the machine, completely wired, and easily accessible.
The packaging speed is controlled by a frequency changer (inverter), while the operational control is provided by a PLC.
The standard degree of protection is IP 54.

CONTROL BOARD

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

VERTICAL SCREW DOSER FOR POWDERS

• container in AISI 304 stainless steel;
• motor-driven internal agitator;
• speed control system with encoder;
• speed control with frequency changer (inverter);
• pneumatically operated shut-off gates;
• dust extraction intake at discharge outlet;
• rapid change for the dosing screw (quick coupling).

SWINGING CUP DOSER FOR GRANULAR PRODUCTS

• 2 cups in AISI 304 stainless steel;
• cup volume adjustment with electric remote control (motor + encoder);
• discharge hatches with return spring;
• swinging motion powered by a motor driven by inverter for a perfect synchronisation according to the packaging speed;
• single discharge channel in AISI 304 stainless steel;
• dust extraction intakes.

INLINE WEIGHING UNITS

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

BUNDLER F/70 MODEL

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;
• support for the 2 reels of wrapping film;
• thermostat-controlled welder and cutting blade for the wrapping film;
• perimeter guards.

It is available in single input version (3 and 4).

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

HEAT-SHRINKING OVEN F/70 MODEL

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

The metal mesh conveyor (with adjustable speed) carries the bundles through the heat-shrinking chamber, which 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 on a parking roller conveyor.

BAG FORMER

If a heat-sealing material is used and the pack size is no larger than 180 x 110 x 440 mm, a bag former can be installed.

The system comprises:

• stand to support the reel (max diam. 500 mm);
• motor-driven unwinder;
• unit which forms the tubular band for the bags, with gusset at the side and longitudinal weld (5);
• pressing of the tubular band to form the 4 corners;
• welding of the bottom of the bag and cutting (6);
• forming of the bottom and bag (7).

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

The application of the “weight checking” system provides continual monitoring of the weights obtained, plus:

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

The system comprises:

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

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

METAL DETECTOR

Main constituent parts:

• motorized conveyor belt appropriately designed to prevent magnetic interference with the detector coil (conveyor at least 2250 mm long, in relation to the bag passage opening);
• detection system;
• digital electronic terminal installed on board 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 cyclically programmable from a keyboard;
• scanning field adjustment;
• automatic compensation of the sensitivity level in relation to the percentage change in product humidity;
• event log displayable on the local control panel (or transferable via Ethernet) including:
  - current date
  - last reset date
  - total bags inspected
  - total bags rejected;
• protection class IP 69;
• MD detection system + terminal constructed in AISI 304 stainless steel;
• visual and acoustic alarm for out-of-tolerance bags;
• remote connection for bag rejector.

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 on the bag to guarantee its closure.

The equipment comprises:

• reel holder (label support);
• device which separates the label and rewinds the backing film;
• pneumatic label applicator.

SIZE CHANGE

Packaging machines can be used for multiple sizes. In this case, the packaging machine will have to be equipped with the related 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: 2.5 hours approx.

SIFTER (FOR FLOUR SAFETY)

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

The drum can be either in stainless steel or nylon depending on the required granulometry and flow rate, and the various models can be equipped with paddles or shakers.