CG650 | Emmeci Elettronica – Design and manufacture of electronic boards and systems

CG650 - Electromagnetic gun


General features

CG650 - CG650
The CG650 gun is designed to offer an alternative to electro-pneumatic guns 88210 series.
Compared to electro guns of all types of CG650 offers three major improvements:
  • It does not require connections to pneumatic systems, given that the activation takes place via electrical command. This particular makes it not only easier to install, but also totally silent.
  • Improved dispensing speed: compared to equivalent guns elettropneumatiche the CG650 is able to work at much higher speeds (depending on the viscosity of the fluid used it is possible to make disbursements less than 2msec *)
  • Improved durability, thanks to the fact that there are no seals on the moving parts, typical of pneumatically actuated guns.

It is equipped on the rear part of a micrometric adjustment knob that allows the determination of the size of the dispensed fluid drops.

The CG650 gun is able to operate with various types of fluids **, such as cold adhesives, essences, oils or other liquids having medium/low viscosity.

Technical details


  • Work pressure: 1 – 25 bar
  • Viscosità  adesivo: ? 2500 mPa.s
  • Diametro ugelli: 0.3 – 0.4 – 0.6 – 0.8 mm
  • Comando elettrico: 24 VDC 9,4W

* Per ottenere elevate velocità di intervento si consiglia di utilizzare uno dei driver con over-boost contenuti nella sezione driver
** Per l’utilizzo con fluidi chimicamente aggressivi è disponibile una versione speciale resistente ai solventi


What is cold glue?

The cold glue, also called cold glue, is a type of liquid adhesive, generally opaque white color, which is formed by an adhesive part dissolved in water. It can be used for bonding almost all the materials (paper, cardboard, certain types of plastics, wood and derivatives, metals, for building material, etc.) With the exception of those non-stick (eg. PTFE / Teflon and siliconised surfaces) and dirty or greasy surfaces. It is also not suitable for paste 2 both impermeable surfaces, given that bonding occurs only when the water present in the adhesive is completely evaporated, operation impossible if the materials to be bonded are non-absorbent.
The cold glue is known in civil field as glue and can be used in a limited number of bondings.
For the industry there are several families and numerous types of cold glue, suitable for uses of each type and with various levels of viscosity and setting time.

The cold bonding is permanent?

After evaporation of the aqueous part of the adhesive bonding is permanent and irreversible. In critical applications, it is possible to combine a cold bonding with glue to one with hot glue. (See related FAQ).

I have to glue different materials. Can I use a single type of hot glue?

Each type of hot glue has fields of use different employees both from its characteristics, both from the time that the adhesive employs before pasting the 2 parts (there are “fast” adhesives that require very little time before making stable bonding and other less rapid that may be pasted after 10-20 “application and still others, such as those used on adhesive tapes, which show the adhesive effect almost permanently).

Where should I use cold glue? What are the advantages compared to other adhesive?

The cold glue can be used in all applications where it is necessary a permanent and irreversible bonding of the parts. The low viscosity of the cold glue it also allows the use in applications where it is necessary to deposit of adhesive points of particularly small size or high speed, it being understood that the bonding will be permanent only after the evaporation of the aqueous part of the glue.

What should I do if I wish to make a cold glue system for an extended time?

The cold glue, in contact with the air, it loses the water contained therein and congeals. And ‘good practice to provide the washing of the entire system (adhesive tank, pump, hoses and guns) with lukewarm water in anticipation of prolonged stops (the time is dependent on the type of adhesive used and its viscosity).

Because in some applications it is used a double bonding hot glue + cold glue?

The 2 types of bonding are complementary, in fact the hot-melt adhesive has a short setting time but the bonding may yield when subjected to medium / high temperatures, while the cold glue, while using medium / long setting times, has an irreversible bonding.
In this way the hot glue will ensure bonding the short term even in fast applications, waiting for the cold glue to provide the definitive and irreversible.

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