SU893532A2 - Apparatus for producing concrete articles - Google Patents

Description

one

The invention relates to devices for molding articles from concrete and other dispersed mixtures and can be applied in plants for the production of precast concrete and reinforced concrete, as well as in plants for the production of asbestos, ceramic, silicate, etc. products.

According to the main author. St. No. 289-1 a device is known which contains a vibrating plate placed in a vacuum chamber with a vertical displacement drive and with a mold installed on it in a bath and a stamp with a perforated upper plane Co.

The disadvantage of the above device is the inability to manufacture products from dry mixes.

The purpose of the invention is to provide the possibility of manufacturing products from dry mixtures by impregnating them with heated compositions.

This goal is achieved by the fact that the device for making

Concrete products are supplied with a main and pipeline connected to it with additional impregnation tanks, each of which is made with a hollow wall filled with a liquid heat carrier and an electric heater placed in its cavity, the main tank has a sealed hook and nozzles for connection with the atmosphere and vacuum sietem at 10 the additional capacity is installed inside the vacuum chamber, and the main above the latter.

The drawing shows the device, the overall appearance.

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Claims (2)

The installation contains a vacuum chamber 4 placed on elastic pads 1 and closed by a lid 2 with a perforated die 3, in which an additional capacity 6 is mounted on a vibrating plate 5 for impregnation in the form of an oil bath with electric heaters 7 and a form 8 with a perforated nozzle 9. Lid supplied with herm. 3 with an internal lock 10 and grippers 11, for vertical movement of the vibrating plate with vibrator 12, pneumatic actuator 13 with pneumatic chamber H is provided. Compressed air is supplied to the system through fitting 15 and duct 16 with stop valve in the form of a plug valve 17, system is evacuated by pipeline 18 and a cork valve 19. The main tank for impregnation 20 with an oil bath and with electric heaters 21 is hermetically sealed with a cover 22 with a device 23 for loading it, a safety valve 2 and a pipeline 25. Ust ystvo for manufacturing concrete component mixtures operates as follows. A mold 8 with a nozzle 9 and a dry mix of dosage is fixed in an additional impregnation tank 6 with electric heaters 7 turned off and closed with a lid 2 with a die 3 The lid 2 is fixed by grippers 11. Then by means of a valve 19 and a pipe. the wires 18 from the vacuum chamber and the main tank for impregnation 20 pump out air, after which they turn on the vibrator 12 and pressurized air into the pneumatic chamber 1 through the fitting 15, carrying out the vertical movement of the vibrating table 5 and molding the mixture. Having completed the molding of the dry, air-filled mixture, the vibrator 12 is inserted into the additional tank 6 by means of a pipe 25 from the tank 20 with the included electric heaters 21 and the chemical substance and water melted down to the state of liquid outside the vacuum chamber k. or a heated aqueous solution of the chemical (s). This operation is carried out as a result of the pressure difference that occurs when the main tank 20 is connected to the atmosphere by means of a crane 17. After that, air is introduced into the vacuum chamber by means of the same crane 17 and pipeline 16 and after 10-120 s the impregnating liquid is removed the conduit 25 to the main tank 20, creating a pressure difference due to the vacuum in the tank 20 by means of a crane. 19. Vibrator 12 is turned on. After 1-2 minutes of repeated vibrations, vibrator 12 is turned off, compressed air is released from the pneumocamera H, and clamps 11 and the cover are removed. 2. Then, by supplying compressed air to the pneumatic chamber H, the vibroplatform 5 with the capacity 6, the mold 8 and the product and the nozzle 9 are lifted, the nozzle is removed, and the mold with the molded product is sent for further technological operation. The invention The device for the manufacture of concrete products according to ed. St. No. А289 1, characterized in that, in order to enable the manufacture of products from dry mixtures by impregnating them with heated compositions, it is provided with primary and connected to it with additional pipeline impregnation tanks, each of which is made with a hollow wall filled with a liquid heat carrier and an electric heater placed in its cavity, the main container has a hermetic lid and nozzles for connection with the atmosphere and a vacuum system, with the additional container installed inside the vacuum chamber, and the main - above the last. . Sources of information taken into account. For examination 1. USSR author's certificate № ,, cl. B 28 B 1/10, 1972.