DE1796714U - HYDRAULIC CONTROL VALVE FOR CUTTING EDGE AND PRESS BAR FOR CUTTING MACHINES. - Google Patents

Description

Honestly Hydraulic control valve for cut indicators and press beams for trimming machines. With bean-dressing machines, in particular with paper-dressing machines; there must be the possibility of using the press beam to be able to perform the following movements: 1.) To indicate the cut. 2.) The pressing of the material to be cut necessary for cutting to achieve.

It must be taken into account that the pressure applied by the press beam Pressing force is only so great when the cut suggestion that the Sohnittandeuter on The Guft to be cut only rests on to avoid injuries to the person operating the machine Man to prevent.

When the press beam is actuated for the cut, the pressing force must be in be variable within certain limits.

The control block registered for protection allows the previously mentioned movements of the press beam. The control block combines the following valves 16 1 solenoid operated longitudinal slide valve A 2. 1 pressure relief valve B }. 1 pressure relief valve with handle C.

The actuating plunger of the electromagnet is used to indicate the cut mechanically pressed against spring F by approx. Y3 of its entire stroke. In the starting position of the valve, the oil delivered by the pump can be fed through port 1 and port 3 flow back into the oil container without pressure. Is activated by mechanical actuation of the mechanical stroke covered, the control piston K locks the channel 3 from. The oil delivered by the pump reaches channel 5 and from there to the cylinder for the press beam and moves the piston of the cylinder upwards until the press beam this time as an interpreter of the son of a son, touching down on the property to be circumcised.

Now the pressure relief valve B responds, because the pump delivered 01 reaches the piston side of control piston K 1 via channel 2 and presses it back against spring F 1 until channel 4 is released. The 01 can then drain through channel 4 into channel 3.

The pressure that builds up in the cylinder 'press beam' depends on the Preload the spring F 1 from. The force of pressure with which the son of the The good to be cut is through the. Relief valve B given.

If the material is to be cut, electrical Contact of the electromagnet of control valve A excited by applied voltage, and the plunger of the electromagnet pushes the piston K against the spring F so far back that channel 3 and channel 12 are blocked.

The electrical stroke indicated in the schematic diagram is put back by the ram.

The oil delivered by the pump reaches the piston side of the cylinder for the press beam via channels 5 and 6 and moves the piston rod upwards and the press beam downwards. With the The piston side of the press cylinder is on the m! & iA press beam 2 designated line connected to the pressure relief valve C.

The press beam touches down. so the pressure builds up and that so big. until the piston K 2 of the pressure relief valve C is pressed against the springs and the channel 7 is opened. The channel 7 is the return line and with the oil tank tied together.

With an attached adjustment option V with a handle, the Spring tension F 2 can be adjusted at any time. This inevitably changes the pressure on the piston side of the cylinder for the press beam and thus the pressing pressure.

In the tension-free state, the piston K and the plunger St are pushed through the spring F pushed back into the starting position. That in the cylinder for that The oil in the pressure bar is pressed out through the channels 5 and 6 by spring force and can flow back through the channels 3 or 7 into the oil tank.

Claims (4)

PROTECTION CLAIMS lo) Hydraulic control valves, especially for bean machines, in which an electromagnetically actuated longitudinal slide valve and a pressure relief valve for the interpretation and a pressure relief valve for the pressure when cutting are combined to form a block. 2.) Hydraulic control valve as under 1.), whereby the connecting channels lie within the block. 3.) Hydraulic control valve as under 1.), whereby the connection the individual connections are carried out by pipelines. 4.) Hydraulic control valve as mentioned under 1.), 2.) and 3.), but designed so that the control block without special connections of the to and outgoing lines can be screwed in front of a plate.