SU50008A1 - Form for making concrete pipes by centrifuging - Google Patents

Description

Known detachable forms for the manufacture of concrete pipes. According to the invention, a form is proposed, the distinctive feature of which is that it is made with only one longitudinal slit for removing articles through it by extending the incision by bending the mold body.

FIG. 1 shows a side view of the form from the side of the seam; FIG. 2 is a cross section of it in / - / fig. one; FIG. 3 is a longitudinal section along A-L of FIG. 2; FIG. Figure 4 shows the cross-sectional connection of the form.

Modern forms for the manufacture of pipes by the centrifugal method consist of two semi-cylinders bolted together.

Starting from the design of the molds, the technological process for the manufacture of pipes is also constructed, as follows. The assembled mold is placed on the machine, a tube is molded into it, and then the tube made with the mold is transferred to the holding place for the hardening of the concrete. New methods of accelerating the hardening of concrete, of course, greatly reduce the time taken to mold, to about one day (after which it is only possible to remove the form from the already hardened pipe), but still for uninterrupted operation of the machine, 28 units are required for its performance. . per shift, the total number of forms is 28 pcs. plus 4 spares, total 32 pcs.

From the description of the technological process it can be seen that the forms are, on the one hand, the limiting fact of increasing the productivity of the machine, and on the other hand, they greatly increase the cost of products due to the higher cost of the forms.

The second disadvantage of the modern method of tube manufacturing by the centrifugal method is the expenditure of a large amount of labor for assembling and disassembling the molds: it is required to unscrew and tighten the 16 bolts (two seams) and remove the half-cylinders.

The proposed form is made of a single cylinder with a notch of 25-35 mm, at the ends of which welded flanges 5 are welded to attach the bands of 6 existing configurations.

To compress the mold, the corners 3, 4 are welded at the edges of the slot with bolts 8 that are not removable during assembly and disassembly of the mold.

For the ultimate expansion in case of need (inspection, cleaning and checking the edges of the slot), there are auxiliary bolts 9 that compress the shape to the limit, i.e., to a position that prevents loss of the spring properties of the metal.

In order to completely seal the seam between the elbows 3 and 4, there are two wedges screwed to the elbows. Between the wedges 1 there is a rubber gasket 2, which completely ensures the tightness of the connection of the mold along the section.

When the form is bolted, the incision is closed and an initial tension is created in the form.

The assembled form is placed on the machine. After the tube is formed, not waiting until complete hardening, it is removed through the extended cut 7. This is done as follows: the mold is released from the bolts that tighten the cut, after which the mold half, in the metal elastic band, is consumed.

The subject matter of the invention.

Claims (3)

1. A mold for the manufacture of concrete pipes by centrifugalization, characterized in that the mold body made of sheet metal has one longitudinal slit 7 for removing the product from the mold by expanding the incision by elastic bending of the housing. 2. In the form according to claim 1, use wedges / located between the angles 3 4 and intended for clamping the elastic pad 2 in order to tightly close the mold. 3. In the form of paragraphs. 1 and 2, the use of expansion bolts in order to expand the longitudinal section.