DE1254949B - Plant for pressing cocoa masses in a pot press - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

A23g

German: 531-11 / 40

Number: 1 254 949

File number: H 57636III / 531

Filing date: November 10, 1965

Opening day: November 23, 1967

The invention relates to a system for pressing cocoa masses in a pot press, which carries out short-term individual pressings in pots with a low filling level in a continuous sequence, with valve or slide-controlled hydraulic drive of the various movements for filling, closing, Pressing off or opening the mold.

In such a known system, a pot press with one or more press pots is in vertical or horizontal arrangement provided, the pot wall in a known manner by a axially displaceable cylinder piece is formed, which closes the mold when a filling is pressed out and opens during the retraction of the plunger by a little more than the height of the press cake.

With such a cocoa pot press, the pressing of cocoa masses is possible in short-term individual pressings to be carried out in constant succession using pots with a low filling level. In press systems for Until now, however, the drive motor and high-pressure pump had to be so large to squeeze cocoa masses be measured so that the peak power requirement of each drive unit, such as the main press drive, retraction and any additional auxiliary drives that may be present if they are operated evenly at the highest Movement speed of all drives connected to the high pressure pump is covered.

In the usual way, a high-pressure step piston pump or pump is used for the individual pressing phases. a low pressure radial pump is used.

According to the concept of the invention, the use of a known pressure medium accumulator is made possible in a press system for pressing cocoa masses in a cocoa pot press a permanent maintenance of one for the simultaneous supply of several drives for current peak power sufficient hydraulic fluid supply with the help of a relatively small high pressure pump.

The drive motor and the high pressure pump are significant when using a pressure medium accumulator To be dimensioned smaller, and a pump with a constant flow rate can be provided as a high-pressure pump will.

For pressing cocoa masses there is also the advantage that during the entire pressing process, especially since towards the end of the pressing of the cocoa mass, the pressing resistance increases considerably, the accumulator pressure is constantly on the main press drive and ensures that optimum Individual pressings are to be carried out in the shortest possible time.

Plant for pressing cocoa masses
in a pot press

Applicant:

Hydraulics G. mb H.,
Duisburg, Mülheimer Strasse

Named as inventor:
Bernhard Kulla, Duisburg

The invention is illustrated and explained in more detail in an exemplary embodiment.

The cocoa pot press consists essentially of a plunger 2 guided in a cylinder 1 with a plunger la and a filter insert 2b. At the press head 3 is the press pot base 5, which is also provided with a filter insert.

A cylinder ring 4, which is axially movable independently of the press drive and forms the press wall, is arranged coaxially to the plunger 2. The power drive for the cylinder ring 4 is denoted by 6. A filling device 7 connected to the cylinder ring 4 is arranged above or to the side of the press chamber enclosed by the press pot base 5, press ram 2 a and cylinder ring 4. It consists of a housing 8 which extends radially to the press chamber and in which a longitudinal slide 9 is guided.

A retreat for the main press drive in shape

of springs is 10 and the cylinder ring drive for the axially movable press pot wall is 6 designated. The cylinder ring retraction is denoted by 11. Other existing auxiliary drives, such as B. those for the lifting device of the filling device 7 are not shown.

In addition to the aforementioned consumers, the press system essentially consists of an oil tank 12, from which oil is fed into a high-pressure pump 14 by means of a feed pump 13. If not a special one Pump 13 is to be present, the pump 14 is arranged in the oil tank and self-priming. The drive motor for the high pressure pump 14 is denoted by 15.

In the present case, an axial piston pump with a constant delivery rate is used as the high-pressure pump selected, which is arranged on the oil tank 12 together with the drive motor. Next to the oil tank there is a pressure accumulator 16.

709 689/27

The pressure accumulator 16 is also designed as a pressure booster. It consists of a dormant Outer cylinder 17, which is fixedly connected to a frame 18, a movable inner cylinder 19, which is arranged in the outer cylinder 17 and guided on a stationary plunger 20. The cylinder space of the outer cylinder 17 is connected to an air reservoir 22 via a line 21. Through the plunger A high-pressure line 23 c is passed through 20, which is in the cylinder space of the inner cylinder 19 flows out.

Furthermore, the inner cylinder 19 is provided with a double-conical collar 24, which is designed as a control edge for high-pressure pump limit switches 25, 26. A high pressure line 23 α leads from the high pressure pump 14 to a control block 27 to which as many control spools 28 are assigned as there are consumers. From the control block 27 a high pressure line 23 & leads to the high pressure line 23 c, which connects the pressure accumulator 16 with the cylinder ring retraction 11. Further high-pressure lines 23 d, 23 e, 23 /, 23 g lead from the respective control slide 28 to the corresponding consumers, such as main press drive 1, cylinder ring drive 6 and lifting device drives (not shown).

The oil return line from the control block 27 to the oil tank 12 is denoted by 24. In the high pressure line 23 a, a safety valve 30 is connected according to the regulations.

The press system with pressure accumulator 16 is operated as follows:

The high-pressure pump 14, which is put into operation, conveys pressure oil into the pressure accumulator via the circulating slide 28 ' 16, i.e. this is filled. There is therefore always a supply of pressurized oil in the pressure accumulator, which is sufficient for the current peak power requirement. When the pressure accumulator is full, the high pressure pump runs 14 idle. This is e.g. B. the case when the inner cylinder 19 is the one in the drawing The upper position shown in the pressure accumulator 16 assumes.

As a result of the compressed air load on the accumulator

This supplies the pressure lines 23 c and possibly one or more further pressure lines 23 d, 23 e etc. via the control block 27 at the same time, which lead to the corresponding consumers.

When the inner cylinder 19 has sunk so far,

that its collar 24 actuates the lower limit switch 26, the high pressure pump 14 is again with full Performance pump pressure oil into the now empty pressure accumulator.

By using the pressure medium accumulator

is the peak power requirement of several drives in the press system, even when operated at the same time covered with the highest movement speed of all drives connected to the high pressure pump.

Claims (2)

Patent claims: 1. Plant for pressing cocoa masses in a pot press, the short-term individual pressing Performs in constant sequence in pots with low filling levels, with valve or slide control hydraulic drive of the various movements for filling, closing and pressing and opening the mold, characterized by the use of an known compressed air pressure fluid storage (16) in one of hydraulic fluid container, high pressure pump and main press drive, filling drive, Closing and opening drive of the press pot as a consumer existing press system. 2. Plant according to claim 1, characterized in that the hydraulic fluid reservoir at the same time is designed as a pressure intensifier. Considered publications:
German patent specification No. 1109 501. 1 sheet of drawings 709 689/27 11.67 Bundesdruckerei Berlin