SU38275A1 - Instrument for the continuous stretching of glass tubes and sticks - Google Patents

Description

The author's certificate no. 38274 describes a device for the continuous extraction of glass tubes consisting of a fixed float located outside the glass melting furnace and in communication with the molten glass reservoir. The float is equipped with a blower tube facing up and surrounded by a protective cap of refractory material. This tube serves to continuously blow through the narrowed upper opening of the initial hollow billet from a glass mass filling the float, stretched in a vertical direction upwards to form glass tubes. For pulling and calibrating the latter, paired rollers are installed on the axis of the float with recesses corresponding to the profile and diameter of the tubes. The exhaust tubes are cooled by hollow rings on the same axis of the float, directly above it, through which the cooling mixture (water, air, etc.) is passed

In the present invention, continuous stretching of hollow glass n (118)

NOW workpieces are produced with hooks attached to the links of an endless chain, equipped with automatically acting clamping mechanisms that serve to pinch the stretchable items when the chain moves upwards.

In the schematic drawing of FIG. 1 shows a vertical longitudinal section of the device; FIG. 2 and 4 are vertical and longitudinal sections of the clamping mechanism in two variations, and FIG. 3 and 5 is the same, top view in FIG. 2 and 4.

The device consists of a refractory float 1 (Fig. 1), having the form of a boat and provided with channels 2 and 3, of which channels 2 serve to blow compressed air through cap 20, and channels 3 for water or air cooling or for heating glass electric current, depending on the working conditions. The float I is somewhat immersed in the molten mass 4 in the furnace 9, and the immersion depth can be adjusted by a lever 6 provided with a pressure paw 8 and a handle 7. By the action of the lever 6 the float 1 is immersed in the mass to the upper level

its sides and compressed air is blown into the glass above points of the caps 20 on the surface of the float, at points 5.5. The hollow glass blanks obtained from the blown-in are fed from the top with a corresponding lure, which, together with the mass of glass, is captured and carried by hooks 14 attached to an endless chain 16 rotating between gears 15 on the axis x17 (Fig. 1). In order to cool the tubes 12 thus exhausted, the appliance is provided with hollow rings 10 through which a continuous stream of cold water is passed from water line 11. In the manufacture of rods, the structure of the device is simplified by the fact that in this case. eliminating the need for using the caps 20 with the channels 2. To pinch the products to be pulled out when the chain 16 moves upwards, the grips 14 are provided with automatically opening and closing mechanisms of the next device. At one or more (depending on the need) links 21 of the chain 16, the holder 27 (Fig. 2 and 3) is strengthened, through the central part of the body of which a rod 29 pulled by a spring 23 and a cam 22 is passed; the latter is activated by pressing on it a gear wheel 15 or another special ejector and is limited in its movement inside the link by an annular clamp 24 on the rod 29, which is connected to the clips 26 by means of rings 25, 25 (Fig. 3) and springs between them The clutch 14 is connected by a spring 28.

FIG. 4 and b show another modification of the automatic opening and closing mechanism 14. In this case, a vrashalka 35 (figs. 4 and 5) articulates with a spring b7 by cam 17 on zena 30 of chain 16, pivotally connected by means of a pull 36 with a sliding ring 38, which, when it moves, moves back and forth clamps 33 snap.

The subject matter of the invention.

1. A device for the continuous drawing of glass nanny tubes and rods, in particular, obtained according to the described 8 author's certificate .Na 3S274 technique, characterized by the use of an infinite chain between gears 15 of the infinite It, with links which are attached automatically a clamping mechanism for pinching the stretchable items when the chain moves upwards between the marked gears.

2. In the apparatus mentioned in item 1, the mechanism for automatically opening and closing the grips 14 consists of a rod 29 passed through the holder 27 pulled by the spring 23 with a cam 22 connected by means of clamps 26 (Fig. 2 and 3).

3. Alteration of the mechanism mentioned in p. 2, characterized by the use of a rotator 35, articulated with a cam 31 and pivotally connected by means of a pull 36 with a sliding ring serving to clamp and dissolve the ends (5 and 5):