DE218128C - - Google Patents

Description

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IMPERIAL

PATENT OFFICE.

PATENT LETTERING

CLASS 80 α. GROUP

Addendum to patent 161996 of October 28, 1903.

Patented in the German Empire on December 15, 1908. Longest duration: October 27, 1918.

The subject of the invention is a further embodiment of that protected by patent 161996 Process and device for the production of cement pipes, which essentially consists in that a reinforcement wire for the cement pipe is passed under the rollers attached to the core in such a way that that it is rolled onto the cement mass by these.

It is already known to move helically upwards through the molding compound Shaped body for inserting a wire or a metal band into the cement mass use, but the iron reinforcement is behind in these known tube forming machines inserted into the molded body in loose mass; If the mass is then pressed, the iron reinforcement prevents this, especially if metal strips are used for this purpose, that the pressure is also on the one under the reinforcement, also still loose cement mass propagates. The consequence of this is that the wire inlay is not at the bottom is limited by tamped mass and thus its effect as a reinforcement insert for the most part loses.

This is avoided according to the invention in that the wire insert, which under is passed through the rollers, into the top layer of cement that has just been rolled down by the rollers is pressed in, so finds firmly rolled cement mass as a base. The next one Cement layer, which is rolled onto the previous layer by the rollers

is, therefore the insert does not offer any obstacle, so that it is ultimately in at all Make equally strong pressed cement mass is embedded.

The drawing illustrates the device forming the subject of the invention

Fig. Τ in a section according to AB of FIG. 2 and in

Fig. 2 in a plan.

The rollers i attached to the core are advantageously provided on their circumference with grooves I corresponding to the thickness of the wire insert, in which the wire insert m is guided. This insert is attached to the base plate at one end η and is either wound up to form a spiral ring, pushed loosely onto the core, as shown in the drawing, or wound in a known manner onto a roll attached above the press, from which it unwinds as the core rotates.

If the core is set in rotation in the direction of arrow 0 and mass is poured into the mold, it produces the tube in helical turns in a known manner. Here, the wire insert m is automatically inserted and always rolled into the freshly rolled surface of the top layer by the rollers.

Since the rollers i are evenly distributed over the circumference of the core and the top roller always rolls new cement mass onto the freshly rolled layer immediately behind the bottom one, the invention

Claims (2)

objects also move the wire insert from its position in the middle of the Pipe wall not to be feared, which is the case with the known machines with a helical inserted Wire insert, in which the insert is inserted in loose mass, very often occurs. Godfather NT-A ν Proverbs: i. Execution of the process for the manufacture of cement pipes according to patent 161996, characterized in that for the purpose of producing pipes with an iron insert a wire (or metal strip) is guided along under the rollers in such a way that it always moves from the rollers into the freshly rolled one cracked cement layer is pressed in. 2. Apparatus for carrying out the method according to claim 1, characterized in that the rollers are provided on their periphery with grooves (I) in which the iron insert is guided during rolling. 1 sheet of drawings.