PRESTO - ELECTRICAL COLD GLUE COATING HEAD FOR PRECISE COATING APPLICATION

Precision from start to finish. Presto is the application head for high-quality cold glue coating application with precise start and exact cut-off. Ideal for applications such as clean gluing of window envelopes or paper bags. Application width and pattern can be easily varied via masks in the nozzle. With one billion operating cycles, electric drive and minimal wear, Presto keeps operating costs low. The coating head is compact and easy to integrate into new or existing systems.

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ADVANTAGES OF THE PRESTO COLD GLUE COATING HEAD AT A GLANCE

  • Electrical application head: low operating costs, minimum wear, quiet
  • Excellent application quality: precise start, clean cut-off., and exact edge definition over the entire service life of up to one billion operating cycles
  • Cost-effective mask technology for variable application widths and patterns
  • Compact installation dimensions for tight spaces
  • Easy integration via 24 VDC interface and precise placement via optional mounting bracket
  • Manual stroke adjustment for easy fine-tuning of adhesive quantity

PRECISION IN COATING APPLICATION OF DISPERSION ADHESIVES

Presto applies dispersion adhesives without solvent with contact – intermittently or continuously. Depending on the design, application widths of 1 to 165 mm are possible. The application quality is outstanding: precise start, exact edge definition, and clean cut-off. The application head achieves this quality thanks to an electrically opening feed element and a switching frequency of up to 500 Hz.

High-precision cold glue coating application on paper bags with the electrical coating head Presto

Design with four feeding elements and a nozzle width of 165 mm

However, the quality of the adhesive application also depends on the alignment of the coating head to the substrate or web. For high-precision applications, we therefore recommend using the optional Robatech mounting bracket. It allows the angle and x/y axis to be set and reproduced with millimeter precision. The adhesive application quantity can be finely adjusted as required via the stroke adjustment using a slotted screwdriver and practical grid.

Robatech mounting bracket for Presto cold glue coating heads
The Presto coating head is suitable for various applications such as:
  • Paper bags, paper bags with viewing windows, 1-kg paper bags for foodstuffs, or paper drinking straws
  • Window envelopes and book covers
  • Cardboard-based furniture parts

REDUCING OPERATING COSTS WITH ELECTRICAL COLD GLUE COATING HEAD

  • The Presto cold glue coating head is electrically driven and does not require compressed air. It has no dynamic seals and therefore minimal wear. Operating costs remain low, especially compared to pneumatic coating heads. With approx. one billion operating cycles, Presto is also very durable.
  • With its mask technology, Presto offers a cost-effective variant for implementing different coating application patterns and widths without structural changes to the coating head. A specific mask is inserted into the nozzle for a defined coating application. To change the mask, simply loosen two screws on the nozzle and remove the comb.

  • Presto offers an optional manual button for flushing and a quick function test. The practical positioning near the application head facilitates handling.

  • Presto is an electrical coating head and is therefore very quiet. This ensures a pleasant working environment.
Optional manual button for cold glue coating heads for flushing or function tests

Presto scores compared to open cold glue roller systems:

  • Less cleaning effort
  • Precise adjustment of the adhesive amount through manual stroke adjustment
  • No contamination or altered adhesive properties

PRESTO: COMPACT INSTALLATION DIMENSIONS AND EASY TO INTEGRATE

Presto can be easily integrated into new and existing systems. Due to its compact design, the coating head is also suitable for tight spaces. A thread on the back of the coating head allows the attachment of a customer mounting plate or the Robatech mounting bracket. This mounting bracket allows the precise positioning of the coating head. The quick-release clamp also makes it easy to detach the coating head from the mounting bracket - ideal for maintenance purposes.

Quick-release clamp on the mounting bracket detaches the cold glue coating head for easy maintenance

The cold glue coating head is available in two variants:

  • Presto 24 VDC: max. 15 bar, 200 Hz, direct actuation by PLC via 24 VDC interface
  • Presto 6 VDC: max. 30 bar, 500 Hz, 6 VDC (48 VDC overexcitation). Only available with external Robatech pattern control.
The Presto feeding element and accessories such as hoses and cables are identical to the Sempre 15/30 cold glue jetting heads. An advantage when stocking spare parts, e.g., if Presto and Sempre application heads are installed in a machine for shopping bag production.

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