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BOBST - Inline flexo presses

BOBST provides a wide range of solutions for the labels and flexible packaging industry. UV flexo and multi-process printing units, digital automation, tension and temperature control offer exclusive solutions and best value for quality and innovation.
All printing presses for labels & flexible packaging include servo driven rewind shaft, touch screen panel on each print unit, main touch screen with PC operated HMI, remote internet full service & organizer for lean handling and storage of magnetic cylinders.
BOBST flexo presses for labels & flexible packaging (formerly GIDUE) are designed for the longest durability and reliability. They are equipped with best internationally available components, assisted by the BOBST international local service support. BOBST in-line flexo presses are in perfect production conditions after many years, with low maintenance costs, consistent quality, and great satisfaction of converters. These presses and converters are winning each year Print Quality Awards worldwide. BOBST quality is built to last.
MX Line
Top Label Quality, Superb Reliability
M1 Line
The Ultimate Press for Label Converters
M3 Line
Digital Flexibility for Labels and Packaging
M4 Line
The perfect press to print with excellent register quality
M5 Line
The "digital" Revolution, for unlimited substrates
M6 Line
The UV Digital Flexo press for food packaging

In-Line Flexo process
The "in-line" flexo printing and rotary die-cutting process is the combination in one pass to convert a material delivering different packaging solutions (PS Labels, wrap-around labels, sleeves, flexible packaging, light carton boxes, aluminium, lamitube).

Unwind, printing, slitting, die-cutting and rewind
Constant web tension is critical for good register and web handling into the press. 
The un-winder is controlled by a braking system, or by a servo motor, that is driven by a dancer assembly which guarantees the constant tow during this process. The web goes first in the web-guide device to be aligned and then, after the dancer assembly, goes to the infeed unit which, together with the outfeed, controls tension and tow along the machine.
The web is printed in between the infeed and outfeed units with the appropriate drying system or UV (ultra-violet) or IR (infra-red) plus hot air. The number of colour stations depends on the requested configuration, from 1 to 12. The printed web goes through the die-cutting section, which can be also configured to suit customer’s requirements, from a minimum of 3 (standard) to a maximum of 5, where the material is die-cut front and/or back and the eventual waste is stripped and re-winded or exhausted by the suction system.

Flexographic printing units
In a modern flexographic press, each print unit when ready to print consists of the following elements:
  1. Printing cylinder
  2. Plate
  3. Impression cylinder
  4. Anilox roller
  5. Rubber roll
  6. Doctor blade
  7. Ink tray
  8. Manual register: longitudinal and transversal
  9. Dryers on each printing station (UV, Hot Air, IR).

Process description
During the printing process, the inking roll transport the ink to the anilox rollers. As the anilox roller rotates, the cells in contact with the roller collect ink, then any surface excess is removed as the roller passes under the doctor blade.
As the anilox rotates, its surface comes into contact with the raised areas of the printing plates mounted on the plate cylinder, transferring the ink. The printing plate then rotates and transfers the image onto the substrate.

Process advantages
Carrying out flexo printing and rotary die-cutting inline produces complex packaging in a single pass and at high quality.

Processed material

1. Paper
Paper is a fibre-based material produced from wood, rags or organic material. The types of paper used in the packaging and graphic arts industries typically use wood and/or recycled paper and board, which is then chemically or mechanically processed to produce cellulose pulp. This pulp is bleached and processed in a paper making machine to produce reels of paper which may optionally be coated or finished to provide a better surface and/or improved visual appearance.
Paper may be between 0.07 mm and 0.18mm thick, with paper for printing and packaging applications generally being in a range between 60 and 120 gsm. The crossover point between paper and board is normally considered to be around 160 grams per square meter (gsm), as it is only at this level that a fibrous material is likely to be stiff and rigid enough to make a container.
Paper has a wide range of industrial applications including use for the packaging of products as diverse as confectionery and cigarettes, as a component in packaging laminates, and for many commercial print uses.

2. Carton board
Carton board (also called cardboard, paperboard or solid board) is the name for a range of paper based materials that includes folding box board (FBB, GC or UC), solid bleached board (SBB, SBS, or GZ), solid unbleached board (SUB or SUS), white lined chipboards (WLC, GD, GT, or UD), some unlined chipboards, and certain laminated boards.
To manufacture carton board, fibrous material, either from trees, recycled paper, or a mixture of the two, is turned into pulp. It is then bleached and processed in a board making machine to create a board consisting of one or more layers, which may optionally be coated to provide a better surface and/or improved visual appearance.
The crossover point between paper and board is normally considered to be around 160 grams per square meter (gsm), as it is only at this level that a fibrous material is likely to be stiff and rigid enough to make a container.
Cartonboard is primarily used in the packaging industry to produce all types of folding cartons, but may also be used for graphics applications. For folding cartons the board used will normally be in the range 200 to 600gsm, or 350 to 800 microns.

3. Film
A film is usually characterized as a thin synthetic resin layer. There are many types of films and their use depends on their physical and chemical properties, which make them especially suitable for a given application.
The most commonly used plastic films are low density polyethylene (LDPE), Polypropylene (PP), bioriented polypropylene (BOPP), and polyester (PET).
Printed film is used for packaging, display materials, stickers, seals, and a wide range of other graphic applications.
Films are generally characterized by their basis weight, expressed in g/m²; and thickness, expressed in microns. For some films it is also useful to know their density, expressed in g/cm3.
The increasing awareness of environmental issues is intensifying research into film substrates derived from renewable sources that are compostable. 

4. Aluminium foil
Aluminum is produced from bauxite, an ore abundant in nature. From the rolling mill, aluminum foils emerge with a natural shiny finish, almost as bright as a mirror, but also can be produced with an as-rolled, satin-like finish called matte.
Aluminum foil has all of the unique functional characteristics of the aluminum alloy from which it is made.
Because of its exceptional barrier properties, aluminum foil is used across a wide range of flexible and other packaging applications to protect foods, drugs, cosmetics, and a lengthy list of other items, most often in combination with other packaging materials.

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Labelmen Machinery

Labelmen là thương hiệu máy móc thiết bị phục vụ sản xuất tem nhãn và bao bì mềm chuyên nghiệp và có tiếng trên thế giới.

Hệ thống các sản phẩm máy móc thiết bị đồng bộ phục vụ cho các ngành sản xuất:
- Tem nhãn (Label)
- Ống ghép màng phức hợp (Laminated tube) 
- Nhãn ép khuôn (In-mould label)
- Bao bì mềm linh hoạt (Flexible packaging)

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