DE229149C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

negative pressure.

The present invention relates to the design of the main patent 198281 based placed device for double, i.e. acting in two opposite directions Pressing with one double-acting press cylinder. The press is simple with two acting press cylinders provided, then the device on which the main patent is based can be used, but not when a double-acting press cylinder is used got. Because in the latter case, each press cylinder space must be used when using the invention on which the main patent is based come into effect alternately as a pump and a press chamber. As a result, there is also a special bypass line and control necessary, as it is already mentioned, for example, in the main patent for the third embodiment.

The drawing illustrates the schematic arrangement of the individual parts of a such double acting press.

Here A is the press cylinder, B an auxiliary cylinder for the idle movement, E the control for the latter, F the high pressure control, G the filling or circulation control and H the overflow valve. C and D are the tools or the tool carriers of the press. It goes without saying that several auxiliary cylinders B can also be used.

The controls G, F, E each consist of two valves 1 and 2, 3 and 4, 5 and 6, which in the illustrated embodiment can be opened by a common drive a, b . / is the circuit diagram for the control lever b. The designations I to V result in the positions of the control lever for the standstill of the plunger and for its form and pressure both to the left and to the right. c is the pressurized water pipe, d is the sewer pipe. Valves 1 to 6, which of course can also be replaced by one or more slides, assume the following positions in the individual positions of control lever b:

55

I. II. III. IV. V. Form after Pressure after Form after Pressure after standstill: to the right: to the right: Left: Left: ( ι open, ι open, ι open, ι open, I to 2 open, 2 open, 2 to, 2 open, 2 open, 3 to, 3 to, 3 open, 3 to, 3 to, 4 to, 4 to, 4 to, 4 to, 4 open, 5 to, 5 open, 5 open, 5 to, 5 to, 1 6 to. 6 to. 6 to. 6 open. 6 open.

60

65

Claims (1)

If, for example, the control lever b is brought into the drawn position IV, then the water in the left cylinder space of the auxiliary cylinder B can pass through the line i and valve 6 into the sewage line d and consequently through the high pressure lines c and k into the right working space of the auxiliary cylinder entering high pressure water the auxiliary piston m to the left ίο move, in which movement the plunger e must participate. The latter displaces the water on the left side of cylinder A through circulation line f, valve 2, connection opening g, valve 1 and circulation line h to the right side of cylinder A. If control lever b is now brought into position V, then the high pressure water continues to act on the right side of the auxiliary cylinder B. The same thing also emerges from the high-pressure line c through the now open valve 4 and the line η into the right-hand space of the press cylinder A and exerts its effect there. The water displaced further by the KoI-ben e- on the left side during the pressing process passes through f, 2, g and the overflow valve H into the sewer line d. The overflow valve H can also be used in another way, for. B. like valves 1 and 2, are forced to open. Positions II and III come into consideration for the opposite movement. In the pre-pressure position II of the control lever, the valve 5 is opened, but the valve 6 is closed. The pressurized water supplied through c passes through the valve 5, the channel r and the line i to the left side of the auxiliary cylinder B, while the right side of the same remains in communication with the pressure line. The piston m is moved to the right because the piston area on the left is larger by the cross section of the piston rod and the same pressure is applied on both sides of the piston. The water on the right side of cylinder A is displaced by piston e and passes through line h, valve 1, channel g, valve 2 and line f to the left side of piston e . When the control lever b is set to compression pressure, that is to III, the valve 2 is closed and the valve 3 pushed open so that the pressurized water from c through the valve 3 and the line f on the left side of the cylinder A against the KoI-ben β can come into effect. Finally, it should be noted that the idle cylinder B can be used at the same time to generate a form. Sponsorship τ claim: Device for filling and emptying press cylinders on hydraulic presses under pressure according to patent 198281, characterized in that in the case of a double-acting design of the press with a double-acting press cylinder, this is connected to one or more idle cylinders (B) and the two working spaces of the press cylinder (A) with the mediation of a circulation line and circulation control come into effect alternately as a displacement space and as a pressing space. 1 sheet of drawings.