delsa produces machines to automatically perform the hot stamping of plastic items.
What is hot stampingHot stamping is a printing technique whose process consists in decorating flat, cylindrical and shaped surfaces through the transferring of a coloured ribbon, called film, and by exploiting the joint effect of pressure and heat.
The pressure is applied by means of a rubber punch heated by electric resistances, which is called cliché. It is possible to transfer both simple and complex graphics, containing writings, logos or thin drawings by properly engraving the cliché surface.
Traditional hot stamping films allow colours to be transferred to the surfaces one at a time.
Multicolour graphics can be obtained with a sequence of printings carried out by multiple heads or by replacing the film with one, called heat transfer, which can offer multicolour and more complex graphics, at your discretion.
Specialised companies create this special type of film through silk-screen printing and then load it on hot stamping machines in the form of roll or die-cut films. The transfer on the piece takes place with a flat shaped cliché or with a roller.
The main benefit offered by the hot stamping is the total absence of inks and varnishes, which makes the stamping process faster, more repeatable and easier to automate.
Hot stamping is a printing technique whose process consists in decorating flat, cylindrical and shaped surfaces through the transferring of a coloured ribbon, called film, and by exploiting the joint effect of pressure and heat.
The pressure is applied by means of a rubber punch heated by electric resistances, which is called cliché. It is possible to transfer both simple and complex graphics, containing writings, logos or thin drawings by properly engraving the cliché surface.
Traditional hot stamping films allow colours to be transferred to the surfaces one at a time.
Multicolour graphics can be obtained with a sequence of printings carried out by multiple heads or by replacing the film with one, called heat transfer, which can offer multicolour and more complex graphics, at your discretion.
Specialised companies create this special type of film through silk-screen printing and then load it on hot stamping machines in the form of roll or die-cut films. The transfer on the piece takes place with a flat shaped cliché or with a roller.
The main benefit offered by the hot stamping is the total absence of inks and varnishes, which makes the stamping process faster, more repeatable and easier to automate.
Hot stamping machinery can be divided into three types:
• flat hot stamping
• rolling hot stamping
• roll-to-roll hot stamping
Flat hot stamping:
this type of machinery is suitable to decorate flat or shaped surfaces, even on large-sized items.
The item to be decorated is moved under a printing head and then held in place during descent and ascent of the head, which is normally driven by pneumatic or hydraulic cylinders.
Here are some examples of items decorated with this technique:
• upper sides of capsules and bottle caps
• casings or parts of domestic appliances
• aesthetic parts of motor vehicles.
Roll-on hot stamping:
this type of machinery is suitable to decorate the side surface of conical, cylindrical and shaped items.
The flat or slightly shaped cliché, keeps still while the item rolls against it through an electric or pneumatic axis dragging. The roles can also be inverted: the piece keeps still and the cliché moves to generate the rolling.
Here are some examples of items decorated with this technique:
• vials
• capsules
• bottles
• flexible hoses
Roll-to-roll hot stamping:
this type of machinery is suitable to decorate items that have raised parts to be decorated against the background. The raised part should be flat or slightly shaped.
The cliché is replaced by a heated roller that rolls on the pieces. Rolling can occur by holding the roller still and moving the pieces or vice versa.
Here are some examples of items decorated with this technique:
• capsules and bottle caps
• logos in the automotive or domestic appliances field
Different multiple heads can be mounted on the same machine. A representative example is the caps and capsules decoration, both on the upper and side surface, by making a flat and a roll printing head work together.
delsa hot stamping machinery normally work with traditional film but can also be equipped to work with heat tranfers.
Beside the construction of hot stamping machines delsa also offers the supply of the needed tools: cliché, film and heat transfers.
Here are some examples of hot stamping machinery
CYLINDRICAL AND FLAT HOT STAMPING MACHINE
DECORATION ON CAPSULES
Machine type ME60/TE+P
• BETTINELLI rotating mechanical table with 4 stations with its axis at an angle of 45 ° to print round surfaces
• electric head for cylindrical stamping
• pneumatic head for flat stamping
• electric arm for loading / unloading parts
• cadence: 2400 items p/h
CYLINDRICAL HOT STAMPING MACHINE
DECORATION ON VIALS
Machine type HS3/PR+C
• electric hot stamping machine for vials
• electric head for cylindrical stamping
• 4 axis automated table-top for part handling during conical, elliptical, convex and cylindrical vials stamping
• possibility of stamping vials with a diameter from 10 to 30 mm, length from 50 to 120 mm
• max.cadence: 2400 items p/h
FLAT HOT STAMPING MACHINE WITH 4 STATIONS
TO HOT PRINT 3 DIFFERENT COLOURS
Machine type T10/4-1HS30+2HS15
• flat hot stamping machine - brush
• Bettinelli rotating table with 4 fixed-stations
• pneumatic stamping head - pressure up to 3000 kg
• pneumatic stamping head - pressure up to 1500 kg
• brush sealing system during stamping and table disc rotation phase
• cadence: 6 sec. per item
