DE2350286B2 - Method and device for the production of moldings from granular plastic masses by vibration - Google Patents

Description

35

The invention relates to a method and a device for the production of shaped bodies from granular plastic masses, in particular carbon electrodes, by vibration, whereby during the vibration in a force is exerted on the mass in the vertical direction.

The pressing by vibration or shaking is carried out according to DT-PS 17 58927 in a molding box, which is set in vertical vibrations by a vibrator. The mass to be compacted is located in this molding box under a heavy cover weight. When vibrating, this covering weight only exerts forces in the vertical direction on the mass to be compacted. Thus, the mass is compressed essentially in the vertical direction by vibration shocks

Your invention has the goal, the degree of isotropy of the Improve moldings. This is achieved according to the invention in that additionally and simultaneously in a force is exerted in the horizontal direction. This will give an improved texture and higher Get densities.

A vibrating device suitable for carrying out the method according to the invention is characterized in that the side walls of the tower box form an angle of 60 ° to one another and in the molding box, a fixed two shaping segments that can be moved along the side walls are arranged heavy cover weight on the shaping segments movable along the side walls lies ^ft 5

With the device according to the invention, using a basic shape with the help of simpler Additional elements both prismatic and cylindrical

cal bodies are formed.

The principle of the invention is based on FIG. J to 3 explained in more detail.

F i g. 1 shows the transverse section of an embodiment, are produced with the cylindrical body, in the final state after the compression of the

Dimensions;

F i g. 2 illustrates in vertical vision; the state before the compaction of the mass; in

Fig. 3 is also shown in what way prismatic Body to be shaped.

In Fig. I and 2 Is 1 an unbalance vibrator on which the molding box 2 is attached or placed with a vertical guide tose .st The molding box 2 consists of two inclined side walls 3. which form an angle of 60 ° to each other. The compressed body 4 in FIG. J is surrounded by the three shaping segments 5, 6 and 6 'which each form a third of the circumference. The shaping segment 5 on the bottom of the mold box rests firmly in the 60 ° wedge of the side walls 3. The two shaping segments 6 and 6 'can slide down on the side walls 3. The heavy cover weight 7 lies on the shaping segments 6 and 6 '. The arcs of the shaping segments 5, 6 and 6' run tangentially into the plane of the side walls 3 and the cover weight 7. During the compression process, the loosely filled coal mass 8 (see FIG. 2) is compressed by the shaping segments 6 and 6 'both in the vertical and in the horizontal direction. The shaping segments 6 and 6 'are during vibration by the deck ₆ eWicht 7 on the side walls 3 to the driven below. The cover weight 7 closes the opening present at the top between the shaping segments 6 and 6 '. Although the cover weight 7 lifts a short sire (amplitude) from the shaping segments 6 and 6 'during the vibration, no plastic mass of carbon penetrates between the upper outer surfaces of the shaping segments 6 and 6' and the bottom surface of the covering weight 7 during the compression process.

The vibration of the entire device greatly facilitates the sliding of the shaping segments 6 and 6 'on the side walls 3 and under the cover weight 7.

The end faces of the outer molding box 2 are perpendicular Ir. the front sides can be locked with doors Openings can be provided, which allow the compressed body 4 to be ejected horizontally the molding box 2 allow. The compacted body 4 can also, if the shaping segments 6 and t> · and aas back weight / removed are on the shaping segment 5 lifted up and picked up with pliers and transported away.

The F i g. 3 shows how the cross-section dimensions of the molded bodies can be changed by means of additional elements. If plates 9 and 10 are placed on the shaping segment 5, the width of the rectangular body 15 is changed. A greater height of the body 15 is obtained by placing plates 11 and 12 on the shaping segments 6 and 6 '. The force exerted by the deck weight 7 is adjusted by additional plates 13 and 14.

In the outer molding box 2 can also be cylindrical Mold bodies with different diameters. To do this in a simple way, are, for example, the in F i g. 1 shown shaping segments 5, 6 and 6 'in concentric.

subdivided shells that can be placed on top of one another

The outer molding box 2 can also be set up for that the deformable mass is compressed under vacuum. For this purpose, the edge of the The molding box 2 has a vacuum hood with a connection to a Vakuurr.puinpe attached and the cover weight are located under the hood and are vak.j'imdicfor Durchfuh held up.

In another implementation example, the following is box 2 mounted on springs and e.n unbalance vibra gate at the top instead of the cover weight 7 or ίη conn dung arranged with the cover weight 7, which acts on the movable shaping segments 6 and 6 '

For this purpose 3 sheets of drawings

Claims (4)

Patent claims: 1. Process for the production of moldings from granular plastic masses, in particular Kohie electrodes, by vibration, whereby a force is applied in the vertical direction during the vibration the mass is exercised, characterized in that that in addition and at the same time a force is exerted in the horizontal direction. 2. Vibrating device for performing the method according to claim I with a molding box which can be set in vertical vibrations by a vibrator, and with one lying on the ground heavy covering weight, characterized. dsßdie side walls {3} of the molding box (2) to each other Form an angle of 60 ° and in the molding box (2) one fixed and two longitudinal side walls (j) movable shaping segment «.... e (5, 6. 6 ") are arranged, the heavy cover weight (7) on the movable along the side walls Forming segments (6,6 ') lies 3. Vibrating device according to claim 2, characterized in that the molding box (2) in itself is evacuated in a known manner via a vacuum device 4. Vibrating device according to claims 2 and 3. dadr rch characterized in that the molding box (2) is resiliently mounted and an unbalance vibrator from above on the movable ^f ^ Qrm ^cr ebun ^cr sse ^cT nisn £ s ^ 6, 6 ') acts.