SU589229A1 - Device for working glass articles - Google Patents

Description

I

The invention relates to a device for continuous treatment in a salt melt of glass products or glass-ceramic materials to be strengthened.

A device for processing products is known, which contains a tank for receiving a molten salt, equipped with a device for maintaining the desired temperature difference in the molten salt. The temperature of the salt decomposition: the lava decreases along the path and in the movement of the device for transporting the racks on which there are articles to be hardened l.

A disadvantage of the known device is that the salt melts are relatively quickly enriched with ion-1-1 leaving the glass surface in such a volume that the objects further processed in this melt cannot be sufficiently strengthened. The limits for maximum contaminant contamination are 3-10 wt.%. With optimal use of the volume of salt melts, its replacement through € 0-250 hours is necessary.

The closest is a device for processing glass products containing several located

sequentially containers with a processing solution and a device for transferring products, installed with the possibility of stepwise movement and equipped with cassettes for glass products 2J.

The disadvantage is the impossibility of providing a constant product strengthening rate due to ion exchange.

The aim of the invention is to provide a constant product strengthening rate due to ion exchange.

This is achieved by the fact that the tanks are connected to one another by overflow devices, the first tank is connected to the drain of the solution, and the latter to the pipeline for supplying fresh solution, the transporting device is installed with the possibility of step-by-step movement in countercurrent with the treatment. solution, and the cassettes are made in the form of removable shelving.

Claims (1)

In addition, the first rack is made with horizontally fastened under each other rods with supports placed on them and equipped with a fcx-mounted device made with the possibility of vertical movement. FIG. 1 shows the proposed device, side view in FIG. 2 is a side view of a cassette (stelgik) with glasses placed on it, which is in a container with saline; in fig. 3 is a side view of a cassette (rack) with glasses, located on the transport device — transport. FIG. 1 shows a furnace with a system of four tanks with a treatment solution disposed therein and a device for transporting products passing through the furnace and supplied with racks. Furnace 1 contains preheating, transition and cooling zones. The furnace roof 2 is provided with a slit 3 extending along its entire length. In the transition zone, heated by electric heating, there is a multi-capacitance system of four tanks 4,5,6,7 with treatment solution 8, which are at the same distance from each other, one after the other, connected to each other through overflow device 9. Each of the wells 4, 5, 6, 7 is surrounded by a wall of refractory stone and stands on the lower tub 10. Capacity 4, located near the preheating zone, is provided with a drain for the treatment solution (salt bath). This drain comes from the oven. The container 7, located in the vicinity of the 6x dps zone, is provided with a supply for the solution / associated with a reserve tank in which there is a fresh solution of potassium nitrate. Through the slit 3 of the furnace 1, a stepped device 11 passes to transport products moving against the motion of the melt 8 of potassium nitrate. The device 11 consists of a series of 12 transport carriages 13 moving in directions along the equal distance from each other, connected to each other through the sliding rods 14. Each of the carriages 13 is equipped with a gear rack 15 driven by an electric motor. At the end of the toothed rack 15, which is lowered into the furnace 1, a sliding rod 16 hangs with glasses placed on it. The device 11 for transporting the products is designed so that the cassettes (racks) 17 in the transfer zone of the furnace 1 with each conveyor movement lower in the container 4, 5,6,7 and in these containers move up and down for a limited period of time. In the vicinity of the carriage 13, a metal sheet for heat sink 18 is located on the underside, which serves to protect against heat escaping through the slot 3. The inlet 19 of the furnace and the outlet 20 are closed by turning E both sides of doors 21 and 22. In the inner the cassette (rack) space 17 is a series of horizontally one below the other sliding supports 23, lying on a horizontally attached sliding rod 24, connected movably through a hinge 25 with fixing device 26, vertically moving upwards and way down. The locking device is guided through the guides 27. The nozzles with a spring holder on the supports 23 ensure that the glasses are held on the racks. On the cartridge mounting device, the beakers are arranged horizontally with openings to the outside. The multi-capacity system has a total solution volume of 5.76 meters, which means that each tank has a volume of 1.44 meters. Glass composition for chemical glasses: 67% Sitfj ABjOj 18% and 15% N «2 O. By moving the transport device in steps, each movement takes place after 1 hour and for a length that corresponds to the transition of one rack 17 from one container to the next T Shelving 11 with chemical glasses, subject to reinforcement, when opening the turning in both sides of the door 21 enter the heating zone of the furnace 1 and it is heated there. In the transition zone, the racks 17 first descend one after the other into the container 4, while the supports 23 of the racks 17 take a horizontal position, the racks remain TcLM 1 h for each short movement up and down by about 10 cm with an interval of about 10 minutes. The melt 8 nitrate capn is homogenized by these up and down movements. After 1 hour, the racks 17 are transferred to container 5 and the process of moving up and down is repeated there. After each of the racks 17 in this way passes all containers in 4 hours, the racks one by one reach the cooling zone of the furnace 1 and exit the furnace when the door 22 turns in both directions at the exit of the furnace. After that, they are fed to a washer. The temperature of the potassium nitrate melt in each of the salt bath containers is about 4,5,6,7. In order not to exceed the maximum permissible concentration for a melt of 8 potassium nitrate, equal to 5% of KNOg — in a tank 4 for a salt bath, corresponding to the total surface of the glass, is supplied from a reserve capacity of 30 kg / h KMOe. . The concentration of KNOj in the tank 5 is 2.53, 5%, in the tank 6 - 1.5-2.5% and in the tank 7-0.5-1.5%. Claim 1. A glass processing apparatus containing several locations.