DE1717281U - COOLING PIPE FOR THE EXTRUSION EXTRUSION EXTRUSION. - Google Patents

Description

S 715

Cooling tube for the extruded strand emerging from the extrusion press

Ee is to be routed in a cooling tube in which cooling water in the pressing direction is obliquely sprayed on the running string known "emerging from an extruder P _r eßstrang. In known Spritzvorriohtungen of this type a circumferential slot or a ring of bores is provided, aue which the cooling water is sprayed concentrically onto the running strand. During the spraying process, each thread of the cooling water runs roughly in a plane laid through the axis of the strand,

Bs has now shown that when the water comes into contact with the hot strand immediately forms a layer of vapor that the strand surrounds like a jacket and hindered the supply of further water to the surface of the strand

Me hiring aims to remedy this disadvantage and consists in that the water is sprayed almost tangentially from nozzles onto the strand «The directional component of the water jet in the pressing direction can remain unchanged. The water jet brought tangentially to the strand tears the Steam builds up and gives the cooling water a rotating movement around the strand, which also continues in the further course of the « Water causes an improved cooling of the strand.

But since the rotation of the water is on a relative basis exhausted short distances and also on a proportionate basis short ways a new vapor layer forms on the strand is according to another feature of the! price increase behind a »first stage wreath,

• 2 m

a second ring of nozzles connected, which is essentially in the form and dimensioning corresponds to the first nozzle ring «The water jets emerging from the nozzles of the second nozzle ring tear the Open the steam jacket again and condense the steam. They also enliven the rotating movement of the cooling water around the strand. Under In certain circumstances it will be advisable to arrange three or more nozzle rings one after the other.

The drawing explains the control, namely shows

Figure 1 is a longitudinal section through a cooling pipe after the hay; * rung _r during the

Figures 2 and 3 explain the position of the water nozzles in relation to the strand.

A not shown emerges from a die 1 in a known manner Metal strand. It runs into a rear extension 2 of a cooling pipe 3 which ends in a cooling pipe socket 4 with a head 3a and is cooled from there, since the sleeve 4 is traversed by cooling water. The Sohr 3 is in the bore 5 of the pressure plate 6 of the

Press. A nozzle half 7 is inserted in the head 3a of the cooling pipe 3. The corresponding other half-nozzle 8 is inserted into the inner tube 9, through which the pressed strand is passed * f the two parts and 8 together form a plurality of nozzles 18, the arrival order to Preßetrang _s from the figures 2 and 5 can be seen. in

the pipe socket 4 is screwed into the outer jacket 10 of the cooling tube * Sr is connected to a pipe socket 11, into which cooling water is introduced in the direction of the arrow 12. The inner tube 9 in turn carries a nozzle half 7 at the front, which is opposite a nozzle half β, to which another non-cooled hollow section 15 »» - sokli * Öt is attached. Duröfc aie »ovens 18 tj & tt Xiaawaeö *? R _t 4 * e la 8iaa · 4« · Mile «14 * ttf» ftöM? T is, ^ _{5 m}

The water entering at 12 runs between the pipes 9 and 10 in the opposite direction to the pressing direction as far as the pipe socket 4 · 2u. Note that this is a pipe section several meters long, which is only shown in abbreviated form in the drawing for reasons of illustration. The cooling water sprays from the Kohrmuffe 4 through the nozzles 18 onto the extruded strand. In FIG. 2, the extruded strand is denoted by 16 and a single nozzle 18 is indicated. The direction of the spray deviates in lig. 2 only slightly from the strand axis »so that the water jet has a strong component in the pressing direction.The nozzle axis does not lie in a plane passing through the strand axis, but in a plane that is tangential or approximately tangential to the pressing strand 16, as in Figure 3 made clear. The water jet exiting in the direction of arrow 17 thus hits the exiting strand tangentially or approximately tangentially (Pig · 3). With this tangential impact it tears the steam jacket formed on the strand. In addition, the water is given a twist, through which it executes a spiral movement around the strand within the cooling pipe.

That which is sprayed onto the strand from the nozzles 18 of the front nozzle ring Cooling water tears the steam jacket that has again formed on the strand. «The steam that has already formed is condensed all cooling water runs off in the pressing direction through the pipe 13 «

The strong directional component of the nozzles 18 in the pressing direction causes that the Xiihlwaeeer den. Pulling cord forward or Eumindeetens Strand moving vehicle supported.

Claims (2)

PA? 73309 »19.1Zri S 715 claims for protection 1) Cooling tube for the strand emerging from the extrusion press, in which cooling water diagonally in Preßriohtung on the outgoing Strand is injected, characterized in that the Vfasser is spun from nozzles (18), the axes of which are approximately tangential hit the strand (16). 2) cooling tube according to claim 1 characterized in that after a first ring of nozzles, a second nozzle ring is connected, wherein the distance is the SI _s enkränze suitably dimensioned so that the ROM first Düeenkränz injected water is partially evaporated on the way to sum the second nozzle ring " ,