CS207261B1 - Device for cooling the cores and covers of hoses die after leaving the extruding machine - Google Patents

Description

CZECHOSLOVAK SOCIALISTREPUBLIC (1β)

DESCRIPTION FOLLOWING COPYRIGHT CERTIFICATE 207261 dl) (Bl)

(22) Enlisted 15 10 79 (21) (PV 6978-79) (51) Int. Cl.3 B 29 H15 / 00

OFFICE OFFICE AND DISCOVERY (40) Published 15 09 80 (45) Published qj u g2 (75)

Author of the invention VIIL OTAKAR ing.

KONEČNÝ JOSEF dipl. those. ARYCHTR LADISLAV ing., GOTTWALDOV. (54) Device for Cooling Tubes and Hoses After Exiting the Extruder Nozzle The present invention provides an apparatus for cooling a tub and wrapped, wrapped, woven, textile or wire hoses after exiting the extruder. In the production of all types of braided or woven, textile or wire hoses, the freshly extruded core or the extrusion die package must be cooled as quickly as possible. The rubber compositions used are very ductile after exiting the die since their temperature is about 100 ° C above. In case of insufficient cooling, there is a risk of pressure sores during further processing. This is especially dangerous when manufacturing hose assemblies. Steel windshields sprayed with a ductile mixture must be transferred to the stack and stacked in several layers. When using plastic spikes, large lengths, i.e., 500-1000 m, need to be wound up with the rubber mixture on the drums. Here the bruises arise not only by the weight of the layers, but also by the bending of the rigid mandrels. To eliminate the danger of bruising, it is necessary to cool the inner tube or jacket to a temperature of 25 to 35 ° C according to the composition of the mixture and thus to solidify it. Straight cooling tubs are used wholly under the set of shower stems, which is suitable for souls without darkness that float the water. Larger problems arise in cooling the tubs on the mandrels, where it is necessary to cool as quickly as possible through the die of the extruder so that as little heat as possible passes into the cold darkness that would slow down the cooling. Steel darkness cannot be bent at all, plastic only slowly, so the fronts of the cooling vanes. Spraying of mandrels takes place at a considerable speed of 20 to 60 m / min. and at the same rate passes through the coolant bath, thereby generating a considerable length of time, because a sufficient residence time is required according to the desired degree of cooling.

To illustrate the prior art in the cooling of the inner tube, an example is obtained from the results measured by the operating device in the hose factory: Bath length 4.2 m, water inlet 261 / min., Inlet temperature 8 ° C. Thickness speed on spindle0 13 mm 22 m / min. Tube temperature at the inlet of cooling 95 ° C, at the outlet of the bath 39 dC. However, the soul or wrap should be cooled below 30 ° C. To achieve sufficient cooling, there is a need for either a very long bath of about 20 m or other equipment with substantially more efficient cooling. Due to the limited space of the production halls, it is a tremendous search for a solution in a multiple wrap of the cooled bath, whereby the extruder must go for a certain amount of time when the mixture is stiff. that can withstand the first bend. Similar devices are not known from the literature. A double-cooling bath is used somewhere. The soul on the mandrel enters the wide tub, 207261

Claims (2)

"2 207261 at the end of which it rises by bicycle and returns air through the air through the second wheel. The second passage winds onto the drum. Sufficient cooling, however, is not dependent on the length of the tub, actually on the delay in the cold-water. By a suitable arrangement, the heat transfer coefficient can be influenced so that the desired cooling is achieved on a relatively short path in a short time. Not only the temperature of the cooling pipes is important, but also the intensity of the turbulence at the point of contact with the cooled body. An apparatus for cooling the tubes and tubing sleeves exiting the extruder nozzle utilizing both the residence time delay and the increase in turbulence of the cooling water flow is the subject of the present invention, which consists of a stack of three superimposed vanes of rectangular cross section. the tops of which are disposed by a slip of 1 to 5 ° and are provided with stoppers disposed at a spacing of 100 to 500 mm and the bottom of the conduit is horizontally provided with a drainage of water and a twin of the guide wheels 2, 3 carrying the cooled tub or a container from one tub to another and placed in a cooling cabinet in which, in both upper trays, the water is directed countercurrently against the process of the entrained tube and the sleeve. A set of three cooling baths is shown in FIG. 1. The elastic rubber compound mixture enters the lower pan 7 and proceeds against the flowing water that is directed to the bottom of the tub for the second time. The bathtubs are slightly inclined about 2 ° and thus allow the water to flow against the cooled cooling mandrel with maximum cooling effect. The overflowing water falls on the guide wheel 2 into the collector 8. The mandrel with the coating is already sufficiently stiff at the end of the tub, enters the wheel 3 and after the baths. It goes through a collecting tub where the cooling effect is somewhat smaller, but here too the coolant is cooled. The tray 2 goes upward and enters the upper tray 6, where it goes upstream of the cold water stream in the article A device for cooling the tubes and wrapped, wrapped, woven, textile or wire hoses from the extruder die, characterized in that it consists of a set of three stacked ones ( 6, 7 and 8) of rectangular cross-section, of which the oblique are inclined with an inclination of 1 to 5 ° and are provided with stops (14) disposed in the same pitch. Finally, it passes through the rollers 5 and through the blow nozzle 9. When cooling the coarse-grained coatings of the larger diameter, a single passage 7 can also be used. The high water turbulence in both countercurrent tanks is achieved by means of stoppers 14, the example and effect of which is seen in FIG. In this case, the stoppers are made of stainless steel and are added to the bath corners at distances of 100 to 500 mm. The stops do not interfere with the passage of the mandrel with the coating, while increasing the transfer through intense swirling, as shown in FIG. 3. Another positive effect is that they lift the surface of the water so that both large and small deposits are sunk and well cooled. The stops can also be made of other materials, of plastic or rubber, only need to be slanted and do not damage the soft coating. Measurements and results were made on the apparatus produced according to the invention. The length of each one is 6 m, the total passage at the sum of 3 van is about 20 m. Cooling water 60 l / min. to each bath, temperature 8 ° C. Coating speed 13 mm 16 m / min. Tube temperature or 90 ° C 95 ° C inlet, 13 ° C outlet. In order to be able to make a comparison, the temperature was measured after the same residence time as in the previous example in a flat tub without stops, i.e. 11.5 t. and 32 [deg.] C., i.e., 7 [deg.] C greater. When cooling tubes on steel shafts, it is preferable to use a horizontal tray without fronts, to feed the water forward, to raise the level with stoppers and to collect water overflows on the sides to collect. In any case, it is preferable to use machine-cooled water at a temperature of 2 to 8 ° C, which may be independent of the season. Machine-cooled water is returned to the freon or ammonia circulation exchangers after passage. BACKGROUND OF THE INVENTION 100 to 500 mm, and the lower pan (8) is horizontal and provided with water drainage and a pair of guide wheels (2, 3) transferring the cooled tube or wrapping one tub to the other and the entire set of tubs (6,7 and 8) is located in the cooling cabinet (1), wherein in the two-sided tubs (6,7) the water is directed countercurrently against the process of the entrained tube and casing. 5 drawings