DE738538C - Device for the production of hollow bodies, in particular pipes, from bindable masses and aggregates - Google Patents

Description

Device for producing hollow bodies, in particular pipes settable compositions and aggregates The invention relates to a device for the production of asbestos-cement pipes according to the cardboard process and consists essentially that the weight of the core roll to generate the pressing pressure is used, which rests in an otherwise known manner on two support rollers, of which at most one serves as a feed roller, and that the required regulation the pressing pressure takes place by changing the distance between the support rollers.

Devices such as those in the German Patent ¢ 16 812, Austrian Patent 130 904 and- the Swiss patent specification 112 558 are described.

The new device and its mode of operation and some other training the inventive concept are shown on the drawing in Figs.

The support pressure rollers are used to produce the hollow body on the core roller i 2 and 3, the axes of which are below the horizontal axis passing through the axis of the core roll i Lying flat and each of which exerts half of the total pressure by the fact that their lines of contact with the core roll i in the working position in a common lying on a horizontal plane. If, as in the example, the diameter of the Support pressure rollers are the same, so in this case their axes are also in one common horizontal plane. The feed felt 6 is around the support pressure roller 2 out, so that this pressure roller also serves as a feed roller.

Otherwise, however, it is also possible to feed the hollow body forming mass to provide a special feed roller.

The axes of the pressure rollers 2 and 3 are in the embodiment according to Fig. i horizontally against each other, so that the rollers 2 and 3, for example from the position indicated by solid circles to the position indicated by dashed lines Drawn in circles Position can be moved. The core roll i with the tube forming on it comes out of the line with solid circles in the position shown with dashed circles. While in one position the centers of the pressure rollers form an angle 2 with the center of the core roller, this angle increases when the pressure rollers 2 and 2 move apart 3 on the angle ä. By changing the distance between the pressure rollers 2 and 3 is the pressure of each of the support pressure rollers, which is on the core roller i and thus on acts on the forming hollow body, changed, however. always the pressures are the same on both pressure rollers.

In Fig.2 these forces are for the two layers shown in Fig. I of the pressure rollers 2 and 3 shown.

Figs. I and 2 clearly show that by corresponding Adjustment of the angle 2 a certain just desired size of the rest Of course, the rolling pressure also depends on the weight of the core roll can be and further that by changing this angle the size of the rolling pressure can be regulated depending on the prevailing circumstances.

This change in the angle a and thus the change in the Size of the rolling pressure can also be made during the winding process the roller pressure during the Aufwickelv organges the desired ratios adapt.

In general, it is desirable as the size increases the thickness of the wall of the hollow body forming on the core roll i, the rolling pressure gradually decrease. For this purpose the previously known facilities had to be used be equipped with very cumbersome devices. Especially in this case it offers However, the new facility is an extraordinary advantage as it is permanently employed Distance of the axes of the pressure rollers 2 and 3 from each other as it becomes stronger the wall of the hollow body forming on the core roll i represents the central axis of the Core roller i moves upwards in height by itself, which in turn increases the angle a and thus the rolling pressure automatically becomes smaller.

Fig. 3 shows an example of the embodiment in which the Change in the distance between the pressure rollers 2 and 3 from each other by opposite mutually directed pivoting of their axes about a common center line is effected.

In the example according to, '£ b1.4 is next to the pressure roller 3 still another support pressure roller 4. mounted, which together with the support pressure roller 3 a calendering or smoothing system for those between the pressure rollers: 2 and 3 wrapped hollow body forms to this by increased pressure from the core roll to solve. i in turn denotes the core roll and i 'a previously wound core roll, which is rolled into your calendering system without feeding further drums. the Adjustment of the @@ 'alzen is expedient here in such a way that the pressure roller 3 is arranged stationary, while the pressure roller 2 and the pressure roller .4 are displaceable to the roller 3 in the direction of the double arrows.

The device according to Fig. 5 is similar to the device according to Fig.q., however, two special support pressure rollers that can be adjusted to one another are used for calendering 4 'and 4 ".

Of course, these calendering rolls can also be adjusted or change of the angle a before and during the rolling, the pressure exerted by these rollers exercise the core roll and the hollow body wound on it, adjustable and be changeable.

Fig.6 illustrates an embodiment of the invention in which serving as a feed roller lovable and lowerable support pressure roller 2 two in corresponding spacing from one another arranged further support pressure rollers 3 'and 3 "are assigned. In addition, each support pressure roller 3 'and 3" is still another Calendering or Smoothing roller 5 'and 5 "zugeördnet, which can preferably be swiveled in and out are. When the support pressure roller 2 is in the raised position, for example, this together with the pressure roller 3 ', a tube is wound on the core roller i. Here the support pressure roller 5 'is in the swiveled-out position. At the same time will from the support pressure roller 3 "and the swiveled-in support pressure roller 5" at the bottom the core roll i 'located pipe smoothed. After 'ending this simultaneous The core roll i 'with the finished tube located on it becomes the work processes lifted, the support pressure roller 2 while pivoting the support pressure roller 5 'and pivoting the support pressure roller 5 "lowered so that they are approximately in the previous Position of the pressure roller 5 "comes, whereupon by means of the pressure rollers 2 and 3" below a new pipe is wound on a new core roll. Simultaneously with this is by the upper support pressure roller 3 'and the pivoted support pressure roller 5' that the core roll i previously wound tube is now smoothed.

Otherwise it succeeds according to the invention also for Winding and calendering manage with a single pair of pressure rollers 2 and 3, because at the same time with a corresponding increase in pressure at the end of the winding process calendering can be carried out.

The invention can be used in both such methods where the length of the pressure rollers corresponds to the length of the hollow bodies to be produced, as well as in those processes in which the hollow bodies are wound up in a spiral shape narrower strips can be formed.

Claims (7)

PATENT CLAIMS: i. Device for the production of asbestos-cement pipes according to the cardboard process, characterized in that for the production of the The weight of the core roller is used, which rests on two support rollers, at least their points of contact are in the same horizontal plane and at most one support roller serves as a feed roller, and that the regulation of the pressing pressure by changing the distance between the support rollers. 2. Device according to claim i, characterized in that one or both support pressure rollers (2, 3) arranged horizontally displaceably transversely to their axis or transversely to their axes are. 3. Apparatus according to claim i, characterized in that both support pressure rollers (2, 3) are pivotable in opposite directions to one another about a common axis. 4th Device according to Claims 1 to 3, characterized in that in addition to the support pressure rollers a special feed roller is provided. 5. Apparatus according to claim i to 4, characterized in that in addition to one of the two pressure rollers, namely In addition to the (3), which does not serve as a feed roller, another parallel axis Carrying pressure roller (4) is preferably arranged at the same height, which together with the adjacent pressure roller (3) forms the calendering and / or smoothing device, wherein the distance between these two rollers can be variably adjusted from one another. 6. Apparatus according to claim i to 4, characterized in that in addition to one of the in the case of the pressure rollers, namely next to the (3), which does not serve as a feed roller, two further axes parallel to each other serving as calendering and / or smoothing rollers Carrying pressure rollers (4 and 4 ") are arranged, the distance between them being variable is adjustable. 7. Apparatus according to claim i to 4, characterized in that a lifting and lowering support pressure roller (2) serving as a feed roller, two below each other arranged further support pressure rollers (3 'and 3 ") are assigned, each of which one with the feed support pressure roller (2) in the raised or lowered position the latter forms a winding system, the feed support pressure roller (2) in their upper and lower position by a further pivotable support pressure roller (5 'and 5 ") can be replaced, each of which in the swiveled-in position with the associated upper or lower pressure roller (3 'or 3 ") a calendering or smoothing system forms and furthermore the distances between the support pressure rollers (3 'and 3 ") and the feed carrier pressure roller (2) or between the pressure rollers (3 'and 3 ") and the pivotable support pressure rollers (5 'and 5 ") are variable.