DE1121527B - Two-part mold jacket for the machine production of concrete moldings - Google Patents

Description

Two-part mold jacket for the mechanical production of concrete moldings The invention relates to one of two juxtaposed, movable with one another connected and upwardly liftable parts existing mold jacket to the machine Manufacture of concrete moldings.

In a known device of this type, the parts of the mold jacket connected by toggle levers with a vertical pull rod so that they when moving the pull rod upwards at right angles from the walls of the upright Formlings are peeled off. During this movement, however, remains on the inner walls of the molded parts, it is not uncommon for material from the molding to adhere to the subsequent Removal of the mold jacket moved over the outer surface of the molding and frequently leads to damage to the molding. When using such two-part molded jackets consequently, a relatively large amount of rejects is created. For this reason, one uses, for example in the machine production of concrete pipes so far only one-piece molded jackets. However, the removal of these one-piece mold jackets from the molding requires a large amount Effort and also easily leads to damage at the lower end of the molding.

The invention brings considerable technical advantages to this area Progress and consists essentially in the fact that in a mold jacket of the initially mentioned type whose parts by mutually parallel eye tabs in such a way are movably coupled to one another that when lifting one of the molded parts of this until the concrete mass relaxes in a tangent to the outer surface of the molding To move the circular arc up and out and the other molding with further lifting is inevitably to be added by the former.

During this movement, between the two to be separated Parts of air penetrate, causing cement mass to stick to the inside of the Shape and thus damage to the molding safely prevented.

In a preferred embodiment are on the side flanges of the molded part, on which a pull rope engages at the top, outwardly directed webs and below these webs recesses for the passage of the flanges of the other molded part attached longer webs provided, the outer ends bent upwards and articulated through the eye flaps with the shorter bars are connected. These eye flaps run from theirs when the molded jacket is closed outer trunnions are inward and out almost at right angles to the flanges when lifting the molded part connected to the pull rope in the manner of parallel crank arms up and out g,> pivots.

The pivoting movement of the molded part connected to the pull rope is limited by stops which are arranged one above the other on the flanges of the molded parts and are preferably adjustable.

The mold formed in this way is particularly simple Structure and high operational reliability.

An exemplary embodiment of the invention is shown in the drawing. 1 shows a partial view of a multiple molded jacket designed according to the invention for the production of concrete pipes; Fig. 2 is a longitudinal section through the mold shell along the line A-B of FIG. 1.

In the case of the multiple mold jacket shown, flanges d and f are welded to the trough-shaped mold halves a and b in the immediate vicinity of the butt joints c, which run parallel to one another and are only a few millimeters apart when the mold is closed.

According to the invention are on the outside of the mold jacket flanges d At right angles outwardly directed webs g fixed by welding. Furthermore are in the flanges d below the webs g through openings h for on the inside the jacket flanges (fastened webs i provided, which at their outer ends according to are bent at the top and are longer than those on the flange ends of the shell parts a fixed bars g.

The superimposed webs i and g are through eye tabs k connected, which in the closed position shown in the drawing of the upright Form jacket from the pivot pin j the Webs i from almost or exactly are directed horizontally inwards.

At the upper end of the outer molded jacket flanges d, cross members m are attached, each of which is engaged by a pull rope n .

Furthermore, fixed stops o are provided on the outer flanges d and adjustable stops p above the same on the mold jacket flanges f, which limit the upward pivotability of the mold jacket half a, d with respect to the other mold jacket half b, f.

When the ropes n are tightened, the mold shell half a, d is first moved upwards and outwards in an arc tangent to the outer surface of the molding, until the stops o and p meet. This slight movement of the mold shell half a, d relaxes the compacted concrete mass in the mold, so that if the ropes n are tightened further, the entire mold shell can be pulled off the just finished molding relatively easily without the risk of damaging the molding . The tubular inner body of the mold can also be pulled out of the molding relatively easily and without the risk of damage after the mold jacket has been opened.

Naturally, the implementation options of the invention by the illustrated embodiment not exhausted. For example, it is possible the webs g and i connected by the eye flaps k are larger or smaller Number of pieces to be provided. It is only essential that when the pulling ropes are tightened uniformly Lifting off one mold half from the other mold half takes place.

The invention can be applied to both single and multiple shaped shells for the production of concrete pipes and other types of concrete moldings.

Claims (5)

CLAIMS: 1. From two juxtaposed, movably connected with each other and existing upwardly liftable parts mold jacket for mechanically producing concrete moldings, characterized in that the shaped parts (a d, and b, f) each parallel eye plates (k) movably are coupled with each other that when lifting one molded part (a, d) it can be moved upwards and outwards in an arc tangent to the outer surface of the molding until the concrete mass relaxes, and the other molded part (b, f) as it is raised further from the former (a, d) must also be raised. 2. Shaped jacket according to Claim 1, characterized in that on the side flanges (D) of the molded part (a), on which a pull rope (s) engages at the top, outwardly directed Webs (g) and below these webs (g) recesses (h) for the passage of longer webs (i) attached to the flanges (f) of the other molded part (b) are provided, the outer ends of which are bent upwards and through the eye tabs (k) are hinged to the shorter webs (g). 3. Mold jacket according to claim 1 and 2, characterized in that the eye tabs (k) when the mold jacket is closed from their outer pivot pins (j) are directed inwards almost at right angles to the flanges (d and f). 4. Sheath according to claim 1, characterized in that the pivoting movement of the molded part (a, d ) connected to the pull rope (s) is limited by stops (o and p) which are arranged one above the other in the flanges (d and f) of the molded parts are. 5. Mold jacket according to claim 1 to 4, characterized in that at least one of the associated stops (o and p) is adjustable. Considered publications: German Patent Nos. 626042, 258920, 435197.