摘要:
The invention relates to a method for the production of a printing plate (11) which may be directly laser engraved, in particular for flexographic printing, wherein a support film (12) is laid out at least approximately horizontally, and an elastomer layer (13) applied made from silicone polymer, fluorosilicone polymer or silicone rubber which is then treated to form a planar surface. The treatment is preferably carried out with a sizing device (24) which forms a calender gap (23), through which the printing plate (11) is transported with the elastomer layer (13) thereon still in an unhardened state. It is thus possible to produce printing plates in a continuous method with very high precision.
摘要:
The invention relates to a sleeve comprising a mulilayer structure for printing presses which are provided with support rollers that are embodied as air cylinders, particularly a sleeve used for flexographic printing. Said sleeve encompasses an inner tube (1) which is made of a reversibly stretchable plastic material and the inner diameter of which is smaller than the outer diameter of the support roller, an elastically compressible intermediate layer (2) that absorbs the radial expansion of the inner tube during assembly of the sleeve, and an outer layer (3). The invention also relates to a method for producing such sleeves. The inventive sleeve is characterized by a supporting structure (5) which is integrated into the sleeve structure between the inner tube and the outer layer, completely penetrates the compressible intermediate layer (2) in a radial direction in at least one place, and stabilizes the outer layer (3) in the peripheral and/or radial direction relative to the inner tube (1). The compressible intermediate layer is relieved of forces acting in the direction of rotation due to the fact that said compressible intermediate layer is partially bridged, whereby vibration stripes are prevented from occurring in the printed image.
摘要:
The invention relates to a method for the production of a printing plate (11) which may be directly laser engraved, in particular for flexographic printing, wherein a support film (12) is laid out at least approximately horizontally, and an elastomer layer (13) applied made from silicone polymer, fluorosilicone polymer or silicone rubber which is then treated to form a planar surface. The treatment is preferably carried out with a sizing device (24) which forms a calender gap (23), through which the printing plate (11) is transported with the elastomer layer (13) thereon still in an unhardened state. It is thus possible to produce printing plates in a continuous method with very high precision.
摘要:
Die Erfindung betrifft ein Verfahren zur Herstellung einer nahtlosen Druckhülse, insbesondere für einen Flexodruckzylinder, die mittels eines Druckluftkissens unter elastischer Aufweitung auf eine Kernwalze aufschiebbar und von dieser abziehbar ist, mit folgenden Verfahrensschritten:
es wird eine ein- oder mehrlagige, hohlzylindrische Innenhülse (1) aus Kunststoff erzeugt, deren Innendurchmesser geringfügig kleiner ist als der Außendurchmesser der zugehörigen Kernwalze, es wird eine ein- oder mehrlagige, hohlzylindrische Außenhülse (2) aus Kunststoff erzeugt, deren Innendurchmesser geringfügig kleiner ist als der Außendurchmesser der Innenhülse (1), die Außenhülse (2) wird an ihrem Außenumfang mit einer Gummischicht (22) versehen, die Außenhülse (2) und die Innenhülse (1) werden unter vorübergehender elastischer Vergrößerung des Innendurchmessers der Außenhülse (2) und/oder vorübergehender elastischer Verkleinerung des Außendurchmessers der Innenhülse (1) ineinandergeschoben und durch Reibschluß gegeneinander fixiert, die Gummischicht (22) wird außenseitig auf eine zylindrische Umfangsform oberflächenbearbeitet, insbesondere geschliffen, und die Oberfläche der Gummischicht (22) wird graviert.
摘要:
The invention relates to a covering which can be mounted on the support cylinders of printing machines, comprising two flange rings (11, 12) on the ends whereon a cylindrical outer covering wall (20) and an inner covering wall (30) rest at a distance from each other. The aim of the invention is to provide a covering, particularly an adapter covering, which can be mounted and dismounted on the support cylinders in an easy manner, which can be produced at low cost and which enables extremely high printing qualities for a comparatively low weight. According to the invention, the outer covering wall (20) is made of a fiber composite material with at least one layer made of a carbon fiber cluster (21), and at least one support ring (40,40A), which supports the outer covering wall (20) in relation to the inner covering wall (30), is provided between the two flange rings (11,12).
摘要:
The invention relates to a method for producing a printing plate, in particular for flexographic printing. According to said method, a layer of curable elastomer is applied to a support (15) comprising a cylindrical jacket surface (26). The elastomer layer on the support is subsequently cured to form a substantially cylindrical continuous plate preform and optionally ground to a preform with a cylindrical periphery, or machined in some other manner. The plate preform (33) is then split along a line running substantially parallel to the axial direction of the support and the printing plate thus produced is removed from the jacket surface of the support.
摘要:
A printing sleeve (30) for a rotogravure or flexo printing roll (31) is provided that has a slightly conical or tapered geometry wherein the inner diameter at one end is slightly smaller than the inner diameter at a second end. Similarly, the printing roll is provided with a slightly conical geometry or tapered diameter as well wherein the outside diameter at one end is slightly smaller than the outside diameter at the other end. The larger end of the printing sleeve is mounted over the smaller end of the printing roll and the sleeve is pushed forward either manually or mechanically until the larger end of the printing sleeve is disposed over the larger end of the printing roll. A key/slot (6) combination may be provided on the inside surface of the printing sleeve and outside surface of the printing roll to ensure proper alignment. An apparatus also is provided for mounting a printing sleeve over a printing roll which includes two support bearings (7;8) for mounting the opposing ends of the printing roll or printing axle. A clamp (9) is provided to positively clamp the larger end of the printing roll against its respective support bearing. A support arm (10) is further provided to balance the printing roll thereby enabling the lowering or release of the support bearing supporting the opposing end of the printing roll. After the sleeve has been partially inserted over the printing roll, the support bearing is then raised and the support arm is released. Then, a push adaptor (11) is provided for forcing the printing sleeve in place over the printing roll with a predetermined amount of force.
摘要:
The invention relates to a method for producing a printing plate, in particular for flexographic printing. According to said method, a layer of curable elastomer is applied to a support (15) comprising a cylindrical jacket surface (26). The elastomer layer on the support is subsequently cured to form a substantially cylindrical continuous plate preform and optionally ground to a preform with a cylindrical periphery, or machined in some other manner. The plate preform (33) is then split along a line running substantially parallel to the axial direction of the support and the printing plate thus produced is removed from the jacket surface of the support.