Technologies for bag-making
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Accessories

Stand-alone accessories

BMTEK offers a wide range of stand-alone accessories which could be installed on other bag-making machines (Arvor, Viara, De Bernardi, Mobert, etc.) as well as in line with extruders.

Click on the accessory name to read a short description.

AMR - MOTORIZED UNWIND

BMTEK’s motorized unwind facilitates the movement of very big and heavy reels.

It has been designed to align at the same height of a pallet and to simplify the loading of the reel on motorized rollers. That system allows 2 or more reels to be loaded easily and quickly, because there’s no need to put a shaft inside the reel.

Advantages of the motorized unwind of BMTEK:

  • you can run 3 or 4 lanes of different materials simultaneously;
  • you can use reels with damaged cores;
  • by means of a buffer system, the unwind automatically adjusts the speed;
  • an automatic alarm system stops the material before the end to avoid the need for re-threading of the film.

STAND-ALONE UNWIND

The BMTEK Stand-alone unwind enables heavy reels to be supported during the film unwinding. It has a solid side frame.

This stand-alone unwind is available in different sizes, depending on the shafts being used:

  • 40mm diameter frame: for rotating shafts with fixed cones;
  • frame with fast lock: for airshafts

The braking system can be:

  • by means of belts of 2,5 or 3,5 meters length, for all kind of shafts;
  • with pneumatic brake with manual control;
  • with pneumatic brake installed on a supporting dancing-bar system.

The BMTEK stand-alone unwind is equipped with a reel end alarm.

LW - LENGTHWISE CUT AND SEAL SYSTEM

Our cut and weld system has a steel frame, rollers and mechanical lane separators. It’s also equipped with knives to cut and seal with controlled temperature and a pneumatic system for entry/exit into the film.

SYSTEM FOR LONGITUDINAL CUT

Using a knife it will be possible to obtain two lanes of production, starting from a single reel of film.

RPG PS - AUTOMATIC FOLDER FOR SIMPLE FOLDING

The BMTEK automatic folder for simple folding is a stand-alone accessory placed in front of the bag making machine in order to extract each completed batch of bags.
Extraction is done by means of grippers which hold the batches.
The grippers can accommodate bags of different thicknesses, thanks to the pneumatic adjustment of each gripper.
The extraction system takes the product as it exits the bag-making machine and depending on its length, the operator can adjust the batch position.
As the BMTEK automatic folder is completely autonomous, it can be coupled with type of machines.

The folder is made of:

  • sides (steel thickness 8mm) joined by means of beams that make the structure completely solid;
  • motorized comb for the first fold, with motion buttons (automatic position search is optional);
  • gripping carriage with gripping fingers spaced at 10 cm apart and operated by means of an adjustable pneumatic motion system, linear guide ways and toothed belt. The unloading cycle enables the batches to be neatly stacked even if the material is slippery material;
  • stacking table with final folding assembly and product support plate.

The BMTEK automatic folder is installed on rails to enable it to slide out-of-line using pneumatic cylinders to simplify the cleaning operation.

BMTEK automatic folder has been designed to meet the needs of all types of bag-making machines.

FOLDER FOR SIMPLE FOLD
Min length of bags 200 – 250 mm.
Max length of bags 3000 mm.

RPG DP - AUTOMATIC FOLDING FOR TRIPLE FOLDING

The BMTEK automatic folder for simple folding is a stand-alone accessory placed in front of the bag making machine in order to extract each completed batch of bags.
Extraction is done by means of grippers which hold the batches.
The grippers can accommodate bags of different thicknesses, thanks to the pneumatic adjustment of each gripper.
The extraction system takes the product as it exits the bag-making machine and depending on its length, the operator can adjust the batch position.
As the BMTEK automatic folder is completely autonomous, it can be coupled with type of machines.

The folder is made of:

  • sides (steel thickness 8mm) joined by means of beams that make the structure completely solid;
  • motorized comb for the first fold, with motion buttons (automatic position search is optional);
  • gripping carriage with gripping fingers spaced at 10 cm apart and operated by means of an adjustable pneumatic motion system, linear guide ways and toothed belt. The unloading cycle enables the batches to be neatly stacked even if the material is slippery material;
  • pneumatic comb that can be chosen for the second folding;
  • stacking table with final folding assembly and product support plate..

The BMTEK automatic folder is installed on rails to enable it to slide out-of-line using pneumatic cylinders to simplify the cleaning operation.

BMTEK automatic folder has been designed to meet the needs of all types of bag-making machines.

FOLDER FOR TRIPLE FOLDING
Min length of bags 200 – 250 mm.
Max length of bags 5000 mm.

AMW (AUTOMATIC MOTORIZED WINDER)

AMW is a system that enables sealed and perforated film to be wound onto a reel.
The AMW system incorporate automatic splicing to enable non-stop production.

This system produces reels from the bag-making machine complete with a tear-line perforation.
The unloading of the reels is manual with the assistance of a suitable pallet truck.
The winding will be by means of pneumatic shafts.

The use of pneumatic shafts enables the production of heavy reels.
Adding a winding system to the bag-making machine will not reduce its performance.

Functioning:

The winding on to the air shaft is achieved using double sided adhesive on the core.
During start-up the film is rolled up manually.
Film tension is achieved using friction rollers with adjustable angles.
Between the bag-making machine and the AMW system, the film is guided around a curve to prevent excess tension on the perforated and sealed parts of the film.
Eye sensor mounted in this area controls the winding speed.
The AMW system has a counter. It controls the start of winding, allowing the operator to unload the finished reel and load the empty core.
A pneumatically triangular blade will cut the film on the tear-line perforation.
A roller will apply the cut edge on to the empty rotating core simultaneously.
The adhesive covering the core pulls the film, starting a new reel.
At the end, the operator will unload the finished reel and put the new airshaft complete with core into position.

The quality of the finished reels depends on:

  • thickness of the film
  • absence or presence of gussets
  • slip characteristics of the film
  • the quality of the core
  • etc …

MDW (MOTORIZED DOUBLE WINDER)

The BMTEK MDW is an accessory that enables you to wind film of various thickness and lengths on to reels.
This system has a solid steel structure.

The reel is kept in tension by a dancer assembly (set of two rotating steel shafts) which, according to their orientation, allow an increase or reduction of tension on the film.
Between the bag-making machine and the MDW system, the film is guided around a curve to prevent excess tension on the perforated and sealed parts of the film. Sensor mounted in this area control the winding speed.

The perforated film is wound on to a motorized expansion shaft, complete with AC motor and 2.2kW inverter. A second winding shaft facilitates continuous winding : a second reel can be started as soon as the first one is complete, thus reducing downtime. The MDW system determines the number of bags for each reel.

On the right side of the winding area, a control panel provides the following functions:

  • to start the machine
  • to start the MDW
  • to regulate the winding speed
  • to stop both machines
  • to adjust the number of winded bags

The electric panel is situated on one side of the MDW and is easily accessed.

STAND-ALONE ELECTRONIC PERFORATOR (FREQUENCY)

BMTEK’s electronic perforator is used to make holes in plastic film with tools of variable diameter starting from 3 mm up to 10 mm or more if required.

The punching operation is electromagnetically activated The maximum number of punching stations is defined by the amount of space they need. A control cabinet is included.
BMTEK’s electronic perforator is PLC controlled. The number of tools to be activated is controlled through the touchscreen.

A potentiometer regulates the power of perforation; a second one regulates the frequency.
The perforation is made as the film is moving, allowing the number of holes to be varied.
A flug extraction system is available.

STAND-ALONE ELECTRONIC PERFORATOR (QUOTA)

BMTEK’s electronic perforator is used to make holes in plastic film with tools of variable diameter starting from 3 mm up to 10 mm or more if required.

The punching operation is electromagnetically activated The maximum number of punching stations is defined by the amount of space they need. A control cabinet is included.
BMTEK’s electronic perforator is PLC controlled. All the data needed to make holes (distance between holes and number of holes) is input through the touchscreen.

The system automatically adjusts the power of the punch, based on the film thickness.
The perforation is made as the film is moving, allowing the number of holes to be varied.
A flug extraction system is available.

TEAR-LINE PERFORATION SYSTEM

The BMTEK tear-Line perforation system is made of a toothed blade and controlled pneumatically. This system makes a tear-line perforation on the bag, to open it easily.

The tear-line perforation system is installed between the rubber rollers and the distance of the perforation is adjusted through a roller for length control.

SYSTEM FOR GUSSETED BAGS

Handy and simple to be used, you can use BMTEK system for gusseted bags on all type of plastic material (HDPE, LDPE, LLDPE, regenerated and bio plastic).

The film passing through an idler group of rollers is inserted between folding wood triangles that, with the correct friction, make the conformation of gussets. The gusseted film is, then, dragged by a motorized calender of rubber rollers, which can be pneumatically opened to insert the film.

The dancing bar situated after the motorized calender, enable to adjust the speed based on the required quantity of material. In that way, BMTEK system for gusseted bags is completely independent and autonomous and can be installed in line or out of line. Thanks to lateral and front gaps, the structure of BMTEK system simplify maintenance and adjustment operations.

OPTIONAL:

  • Service bridge: accessory that enable the operator to cross the film passage in order to make adjustment on the BMTEK system for gusseted bags.
  • Folding wood triangles: additional couple of wood triangles to make gussets on one more lane of material.