BlogHotel.orgAccueil | Créer un blog | Imprimer la page Imprimer | Blog hasard Au hasard | Chercher des blogs Rechercher | Entrer dans le chat du blog Chat | | Jeux Jeux | Adminitration et édition du Blog Manager

wisepowder Accueil | Profil | Archives | Amis

FLEXO VS. OFFSET PRINTING (THE 3 MAIN DIFFERENCES EXPLAINED) Although both methods use wet ink and printing plates, these two printing processes are quite different. Technically, offset printing can refer to any printing technique that uses a printing plate to transfer an image to an intermediate carrier and then onto the printed substrate. Whereas flexo transfers ink from the plate directly to the substrate.Get more news about Flexographic Flat Printer,you can vist our website! Flexo and offset are both popular, but they perform their tasks differently. It is important to understand what roles they perform and have a clear understanding of both types of printing process. The type of press to use depends on the final product and quality required, as well as volumes and substrates. DIFFERENCE 1: PLATES As the name suggests, flexo printing utilises flexible plates for a rotary printing process. The plates are made from a photopolymer compound and are flexible enough to be wrapped around a printing cylinder. The relief image on the plate is fixed via a laser image-setter and the polymer in the ‘non-print’ areas is washed away in a processing unit, where it is dissolved into a solvent or water solution. Ink is transferred from the ink well via a rotating ‘anilox’ roller onto the flexo plate. A separate printing station & flexo plate is required for each colour to be printed. The image is then printed directly onto the substrate. The printing plates are quite durable and if stored correctly, can be re-used several times, before they eventually need to be replaced. For offset printing, again as the name suggests, ink is transferred (offset) via a series of rollers onto the printing plate. This can be either a flat-bed or rotary process – depending on the type of offset press. The plate is usually made of aluminium. The complete wet image (either single colour or multicolour) is then transferred onto a ‘blanket’ and in turn onto the substrate, before drying. DIFFERENCE 2: INK Offset printing usually consists of four ‘process’ colours; cyan, magenta, yellow and key (which is black). Each colour has a dedicated printing station. Any spot colours are made from a combination of the process colours. Ink can be water based or UV curable. Although process colours are also used in the flexo process, additional print stations tend to be used for spot colours. Spot colours can be supplied pre-mixed, or can be mixed in-house, as required. Flexo inks can also be water-based or UV curable. Solvent based inks can also be used. UV inks enable higher running speeds and can be left in the press at the end of the day, without the need to empty & clean each print station. Water based inks need to be removed from the press, when it is not in use – to prevent ink from drying on the rollers & in the ink trays. DIFFERENCE 3: TYPES OF MATERIALS TO PRINT ON Offset printing machines can print on materials such as; paper, metal, cardboard, cellophane and vinyl. The printing surface must be flat and smooth. It is excellent for printing newspapers, books, magazines, stationery, posters, brochures and so on. Generally, to print onto both sides of the substrate will require a second pass. Similarly, any die-cutting, slitting, folding, creasing, laminating, etc is done as a secondary, off-line process. Flexography is used on both absorbent and non-absorbent materials, for example, cellophane, foil, cardboard, fabric, plastic, metal etc. It is mostly used for packaging; envelopes, retail bags, wallpaper, paper, newspapers, sweet wrappers, labelstock and so on. The main difference with both processes is that offset printing is only done on flat surface while Flexographic printing can be used on almost any substrate with a flexible surface. Flexo printing can achieve high speed production and many presses have multiple converting options integrated into the press, enabling a single pass operation.
0 Commentaires | Poster un Commentaire | Lien Permanent

What are the different types of connector locking mechanisms?6/6/2023
What are the different types of connector locking mechanisms? Most connectors are equipped with a locking mechanism or ‘coupling system’ that allows the mating halves to be fixed together securely. This mechanical system holds the connectors in place to ensure a continuous connection, preventing accidental uncoupling.Get more news about Bayonet Lock Coupling,you can vist our website! With so many types of electrical connectors and specifications available, it can be difficult to find the most reliable option for your applications needs. The most popular types of connectors are referred to as circular connectors and rectangular connectors due to their shapes - let’s take a look into the common locking mechanisms available for these formats. Bayonet locking Most people will know a bayonet as a weapon – a blade that can be fixed to a firearm – but this military use also inspired the engineering term. A bayonet coupling system uses a plug or pin on one side and a receptacle or hole on the other, which requires rotating to engage or disengage. Bayonet connectors are easy to operate by pushing the aligned parts together and rotating until an audible clicking sound is heard. Not only is it quick to secure, but it’s also quick to decouple, as a 1/3 turn can swiftly lock or unlock the connector. As rotation is required, bayonet locking mechanisms are typically used by circular connectors. These durable systems can then be used to transmit power or signals in a variety of applications. Its resistance to shock and vibration makes it ideal for use in outdoor equipment. Screw locking Screw locking is another term for threaded coupling, which is a simple and universally recognisable system that allows parts to be tightened to a specific torque. Typically, one part has multiple pins or sockets that insert into the opposing part, and the coupling ring on one half is turned to engage the threads. Again, in order to twist the connector and engage the locking mechanism, the connector has to be circular. However, there are also rectangular connector designs that use screw locking mechanisms, though these operate a bit differently. Central screw mechanisms for rectangular connectors tend to have guide pins on one part and a central screw on the other, which connect in more of a push-pull style and may have a spring-loaded mechanism to prevent the central screw from loosening under vibration. Jack screw (or jackscrew) mechanisms for rectangular connectors are most often used with d-sub miniature backshells. Usually, the backshell has a jack screw on either side, and the panel connector houses internal threads for them to mount into.
0 Commentaires | Poster un Commentaire | Lien Permanent

Page 1 of 1166
Précédent | Suivant