DE2010702A1 - Clamping device on the Rütte ^ unit of molding machines for molding boxes - Google Patents

Description

DRYING. RICHARD GLAWE DIPL-ING. KLAUS DELFS DIPL-PHYS. DR. WALTER MOLL

MDNCHEN HAMBURG MUNICH

6000 Munich 22 ■ Liebherrstrasse 20 ■ Tel. (0811) 22 65 48 2000 Hamburg 52 · Walzstrasse 12 ■ Tel. (0411) 89 22 55

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A 95

MONKS

MALCUS INDUSTRI AB LahoImsvagen 72,

03 Halmstad / Sweden

Clamping device on the vibrating unit of Porrn machines for molding boxes.

The present invention relates to a vibrating unit of molding machines for molding boxes. Such a unit consists of a table with a vibrating piston, which is movably mounted in a vibrating cylinder, and a moving table in the cylinder arranged anvil, the anvil and table in a known V / eise through a pressure medium and channels in the table and anvil to be brought to pulsating relative movement. When a pallet with a cast model is placed on such a table

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and a molding box is placed on the pallet, shaking movements generated when the Box is filled with sand in order to compact the sand, the box hopping under certain conditions, whereby Sand can leak between the bottom of the box and the pallet.

The present invention has set itself the task of preventing sand in the manner mentioned from the molding box runs. This is achieved according to the invention in that the vibrating table, pallet and molding box together form a single unit that is resiliently clamped and thereby made to vibrate as a single unit can be. The characteristic properties of the invention emerge from the following claim.

The present invention will be described in more detail in connection with the appended four figures.

Fig. 1 shows a basic sketch of a vibrating unit according to the present invention.

Fig. 2 and J5 represent the same vibrating unit, However, these are provided with channels for a pressure medium so that relative movements are imposed on the anvil and vibrating table can be.

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Fig. 4 shows vibrating table and molding box as a unit with their clamping.

In Fig. 1, 1 is a vibrating table attached to its underside is provided with a tubular shaker flask. Said tubular vibrating piston runs in a cylinder 3, whereby the outer surface of the vibrating piston * 2 rests against the inner surface of the vibrating cylinder 3. A cylindrical anvil 4 is arranged in the vibrating flask 2. Its outside diameter is roughly accurate as large as the inner diameter of the shaking flask 2. A spring 5 * acts on the anvil and strives to to press the anvil against the underside of the vibrating table 1. By means of pressure medium channels, not shown, can the anvil can be caused to move relative to the vibrating table so that the vibrating table vibrates Movements. If the vibrating table is subjected to an oblique load during these vibrating movements jamming against the shaker flask may occur, but the anvil will not be in either Influences the case of this seizure, which is why the anvil the desired relative movement with respect to the vibrating table retained and thus the effect of the above-mentioned jamming can be avoided.

In the following, the construction just mentioned is intended in Relationship with the pressure medium ducts are described,

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which generate the aforementioned relative movement. In the vibrating table 1, a pressure medium channel 6 is arranged in a Channel 7 runs out in the anvil. Said channel opens into a space 8, which is from the upper part of the anvil and from Lower part of the vibrating table is formed. In the vibrating flask, an annular channel 9 is also arranged, which with a Channel Io communicates in the anvil. Said channel is also connected to a central channel 11, the connection has to a drainage channel 12. The arrangement described works in the following way:

A pressure medium is fed to the channel 6. This can consist of either air, oil or any suitable pressure medium. Said pressure medium passes through the channel 6 and is passed on to the channel 7 and the space 8. Given the space 8, the pressure medium causes the table 1 and the anvil 4 to move away from each other. The anvil and table will assume the position shown in FIG. During the relative movement between anvil 4 and piston 2, the anvil is cut off from the pressure medium supply via channel 6. The channel 7 is then directly connected to the channel Io, which means that the pressure medium in the space 8 will escape through channels 7, 9, Io and 11 to the outlet 12. As a result of the action of the spring '} , the anvil 4 will again assume the position shown in FIG

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is shown, after which a new cycle begins again. From the foregoing it follows without further ado that one a relative movement between the anvil and the vibrating table with the aid of the pressure medium and the channels described can achieve.

In Fig. 4 the vibrating table, the vibrating piston, the vibrating cylinder 3, the anvil 4 and the spring 5 are present. A pallet 17 with a cast model 18 is arranged on the vibrating table 1. A molding box 19 is placed on the pallet. The molding box in turn is in contact with a support 2o which is fixedly arranged on the lower edge of the emptying opening 21 to form a sand container. Said yielding support can consist of rubber or similar material with corresponding properties. A flexible support 21 is also arranged between the opposing surfaces of the vibrating table 1 and the cylinder 3. The support can, for example, consist of rubber or other similar material.

The arrangement described above works in the following manner. When the pallet and the molding box have been placed on the vibrating table, the vibrating unit with pallet and molding box in such a way pressed against the flexible support 2o that molding box,

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Pallet and vibrating table between the vibrating cylinder and the drain opening 21 to the sand container resiliently closed come hanging. If the vibrating table is now exposed to vibrating movements with the help of the anvil, the The vibrating table, the pallet and the molding box are exposed to vibratory movements, which then act like a single one Move unit. This has the consequence that abrupt movements of the molding box with respect to the pallet completely be avoided.

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Claims (1)

Claim Clamping device on the vibrating unit of molding machines for molding boxes, in which the vibrating unit is off a movable table with a vibrating piston arranged in a vibrating cylinder and a moving Jt in the cylinder arranged anvil, the anvil and table in a known manner by means of pressure means and channels in table and Anvil Su be brought pulsating relative movements, characterized in that the vibrating unit (1, 2, 3) and the one arranged on the vibrating table (1) Molding box (11) with pallet (17) with the aid of a pressure device, for example a press cylinder (24), 'in such Way can be pressed against a sand container (21) or other stop that the free upper edge of the Molding box (19) with the mouth edge of the sand container (21) or comes into contact with the stop that between said two edges an elastically flexible intermediate layer (2o) is arranged and that between the contact surfaces between vibrating table (1) and vibrating cylinder (3) also an elastically flexible intermediate layer (22) is attached. 009843/1218 Blank page