DE19510797A1 - Temperable cylindrical rotating body - Google Patents

Description

The invention relates to a temperature-controlled cylindrical rotating body according to the preamble of claim 1.

In offset printing in particular, it is for high quality printing required, the temperature of the cylinders involved in the printing process, such as Form, transfer and impression cylinders, and rollers of the ink and Dampening system, especially the friction rollers, at a low level to keep constant, with related demands for the waterless Offset printing are particularly high.

Therefore, in DE patent application P 44 31 188.5-27 u. a. featured beat, the cylinders and rollers mentioned with an internal cooling equip. For this, the coolant is unilaterally through a pin of the cylinder body via a connection head attached to the face of the pin and dissipated. The cylinder body is centered by an inflow line penetrates that on the opposite side of the coolant connection of the cylinder body in connection with a jacket-side cooling chamber stands, which is on the side of the coolant connection in the inflow line circular drain pipe opens.

An analog design has one described in DE-G 94 08 328.2 U1 ben forme cylinder for waterless planographic printing.

The known solutions are not the respective operating conditions economically adapted. This applies in particular to the offset pressure, in the process-related to ensure the respective quality fair printing from newspaper printing to commercial printing print the requirements regarding a certain temperature at the Printing of rollers and cylinders involved, such as inking and dampening rollers zen as well as form and transfer cylinders, and especially these  The requirements for waterless offset printing are particularly high.

The invention has for its object a temperable zylindri to create the rotational body according to the preamble of claim 1, the economically different process and machine sp specific requirements can be used.

The object is achieved by the characterizing features of claim 1 Fulfills. The invention allows an optional coolant connection two pins of the cylinder body, usually on the printing press on the clad operating side or the oil-tight encapsulated drive side.

Due to a greater warming of the An compared to the operator side on the drive side, it is in the interest of an even temperature distribution cheap to cool the oil used as a lubricant. In this case the oil can also be used as a coolant for the cylinder body, the latter flowing oil into a housing on the drive side the drive mechanisms arranged there run lubricatingly freely.

On the other hand, it is common to use a separate coolant, e.g. B. water Avoidance of damage in the event of a leak or for reasons of space feed and discharge to the operator side. In both cases the same cylin is used the body can be used.

So it is also possible to retrofit the cylinder body higher print quality or switching to waterless offset pressure from oil cooling to effective cooling with a separate one coolant with appropriate prior cleaning of the cylinder body to convert pers in the machine.

The sub-claims contain further advantageous refinements of Invention.

The invention is explained in more detail below using an exemplary embodiment tert. In the accompanying drawings:

Fig. 1: an inventively terminals a schematic longitudinal section of the cylinder body with permitted alternatively installable coolant,

Fig. 2 shows a variant with a comparison with FIG 1 amended inflow in the cylinder body.

Fig. 1 shows a cylindrical body of revolution in the form of an iridescent friction roller of an inking or dampening unit of an offset printing machine.

The rotary body has a cylinder body 1 with a tubular jacket 2 , in each of which a face in the machine frame 3 ; 3 'mounted pin 4 ; 5 is attached.

The pin 4 ; 5 each have a drain line 6 ; 7 for the Kühlmit tel acting coaxial bore, the front of the pin 4 ; 5 closes with a thread, in which either an end plug 8 or one with connections 9 ; 10 provided for the coolant supply and discharge, the rotation of the respective pin 4 with respect to the connections 9 ; 10 enabling connection head 11 can be screwed.

One from two pipes 12 ; 13 existing, connected to the terminal head 11 through supply line 14 at their first pipe 1 2 coaxially opposite to their expanded in diameter discharge line 6 and with its second, in each of the discharge lines 6; 7 compared to the cylinder body 1 limiting, reduced diameter bores 15 ; 16 both pins 4 ; 5 inserted tube 13 serves as the temperature chamber 17 cavity of the cylinder body 1st

The coolant emerging in the drain line 7 of the pin 5 opposite the coolant connection flows through bores 18 into the temperature control chamber 17 and, as a result of the centrifugal force, returns to the jacket side in the rotating cylinder body 1 and enters the pin 4 carrying the connection head 11 into the feed line 14 through the same holes 19 an annular enclosing drain line 6 , from which it flows through the connection head 11 and a connecting line, as a rule, into a system, not shown, which coolant conditioning and cooling system.

Fig. 1, however, shows an embodiment in which the connection head 11 is arranged on the drive side I within an oil-tight encapsulated housing 20 , the oil 21 serving for lubricating the drive elements additionally serving as a coolant, which freely flows in after flowing through the cylinder body 1 the housing 20 runs against the oil splashing 21 drive wheels.

As a variant, a connection head 22 installed on the opposite operating side II for a separate, closed coolant circuit with, for example, water 23 as the coolant is shown in broken lines in FIG. 1, in which case the pin 4 on the drive side I is closed by an end plug. This must be done with the connection head 11 ; 22 connected pipe 12 ; 24 of the inflow line 14 are each adjusted under different pin lengths.

Fig. 2 shows a compared to Figure 1 modified inflow line with an up to the opposite pin 4 'continuous, attached to the connection head 25 and with this optionally in both pins 5 '; 6 'a settable tube 26 as an inflow line 27 , the coolant guide corresponding to that of FIG. 1.

Reference list

1 ; 1 ′ cylinder body
2 coat
3 ; 3 ′ machine frame
4 ; 4 ′ spigot
5 ; 5 ′ spigot
6 ; 6 'drain pipe
7 ; 7 'drain pipe
8 ; 8 'end plug
9 ; 9 'connection
10 ; 10 'connection
11 connection head
12 pipe
13 tube
14 inflow line
15 hole
16 hole
17 ; 17 ′ temperature chamber
18 hole
19 hole
20 housing
21 oil
22 connection head
23 water
24 tube
25 ; 25 'connection head
26 ; 26 ′ tube
27 Inflow line
I drive side II operating side

Claims (6)

1. Temperable cylindrical rotary body for printing presses, in particular cylinders and rollers for offset rotary printing presses with a one-sided supply and discharge of the coolant through a pin of the cylinder body, which is centered by an inflow line through which on the opposite side of the coolant connection of the cylinder body with a - And multi-part jacket-side temperature control chamber communicates, which on the side of the coolant connection opens into a flow line surrounding the inflow line from the flow line, characterized in that both pins ( 4 ; 5 ; 4 '; 5 ') of the cylinder body ( 1 ; 1 ' ) can be configured alternately with the coolant connection for the inflow line ( 14 ; 27 ) and the outflow line ( 6 ; 7 ; 6 '; 7 ') or with an outwardly sealing closure and the inflow line ( 14 ; 27 ) each the transfer of the Coolant into the temperature chamber ( 17 ; 17 ′) providing is variable. 2. Temperable cylindrical rotating body according to claim 1, characterized in that the drain lines ( 6 ; 7 ) of both pins ( 4 ; 5 ) are connected by a permanently installed coaxial tube ( 13 ), at the ends of which one with the connection ( 9 ) for the coolant supply, the tube ( 12 ) which is reduced in outer diameter compared to the drain line ( 6 ; 7 ) can be inserted. 3. Temperable cylindrical rotary body according to claim 1, characterized in that the drain lines ( 6 '; 7 ') in the pin ( 4 '; 5 ') relative to the temperature chamber ( 17 ') of the cylinder body ( 1 ') each through a reduced-diameter bore ( 15 '; 16 ') are limited, into which the cylinder body ( 1 ') coaxially penetrates a pipe ( 26 ) connected to the connection ( 9 ') for the coolant supply in the region of the opposite, non-connected drain line ( 6 ') is. 4. Temperable cylindrical rotating body according to claim 1 to 3, characterized in that the cylinder body ( 1 ; 1 ') is designed symmetrically inside with respect to the optional coolant guide. 5. Temperable cylindrical rotating body according to claim 1 to 4, characterized in that when a joint use of oil ( 21 ) as a lubricant and coolant, the inflow line ( 14 ) is connected to an oil preparation and cooling system and the Abflußlei device ( 6 ) with an oil-tight encapsulated housing ( 20 ) enabling the drive elements arranged in it to be wetted with oil ( 21 ). 6. Temperable cylindrical rotary body according to claim 1 to 5, characterized in that in each case the drain line ( 6 ; 7 ; 6 '; 7 ') is provided on the end face on the pin ( 4 ; 5 ; 4 '; 5 ') with a thread in the mutually a plug ( 8 ; 8 ') or a connection head ( 11 ; 22 ; 25 ; 25 ') can be screwed in, each with the insertable tube ( 12 ; 24 ; 26 ; 26 ') of the inflow line ( 14 ; 27 ) together demon is animal.