SU755560A1 - Apparatus for moulding articles from concrete mix - Google Patents

Description

The invention relates to a device for forming articles from concrete mixtures, mainly in factories of reinforced concrete products, house-building factories, landfills for the building materials industry.

According to the main author. St. No. 365255 known device containing a vacuum chamber, a vacuum system, stamp, shape and drive die [1].

The disadvantage of this device is the impossibility of complete degassing of the mixture.

The aim of the invention is to improve the quality of the product due to a more complete degassing of concrete mixtures.

The goal is achieved by the fact that the device for forming articles from concrete mixtures is equipped with a bunker with an aperture and an airtight lid, a nozzle with spring-loaded projections mounted in the upper part on its inner side, and the stamp has a concentric hole in the upper part located under the bunker aperture, and the lower a part of the stamp is made of sectors articulated with each other with clamps of their horizontal position.

2

The drawing shows the proposed device in section.

Above the form 1 with a nozzle 2, mounted on the base of the vacuum chamber 3 mounted on the vibrating plate 4, is a welded structure consisting of a bunker 5 connected by an opening in the movable cover 6 with a die 7, on which two sectors 9 are fixed on axis 8 Sectors 9 rotate (under the action of their own weight and mass of concrete) around, 0 axis 8 by 45 ° to the vertical. The horizontal fixed sector 9 locks 10. On the inner surface of the nozzle 2 are mounted spring-loaded projections 11 which open locks when moving the die 7 is pressed down and snap them in that state ¹⁵ by moving the stamp 7

up.

The upper part of the bunker 5 is hermetically sealed with a lid 12 of the bunker through locks 13 and a rubber pad 14. The movement of the stamp 7 is provided by a pneumatic actuator of its vertical movement, which consists of a tire 15 with a rubber chamber 16 supported on the protrusion 17 of the wall

755560

vacuum chamber 3. In the vacuum chamber 3 a fitting 18 is mounted, connected to a vacuum pump. The rubber chamber 16 is connected to the compressor through the nozzle 19.

The device works as follows.

After sealing the chamber, the mixture is evacuated in the bunker 5 and in the internal cavity of the punch 7. During the vibration process, the vibrating plate 4 in the initial stage of the vertical movement of the movable cover 6 and punch 7 causes the locks 10 to be opened by pressing spring-loaded protrusions 11 located on the inner wall of the nozzle 2. Sectors 9 are rotated around a horizontal axis 8 by 45 °, and the concrete mix wakes up in form 1 through nozzles through the openings 2. At the same time, during the impact on the falling This mixture of vibration and vacuum causes its additional degassing (trapped, adsorbed on the surfaces of solid particles and air dissolved in water). The concrete mix fills the form and part of the nozzle 2, after which the vertical movement of the movable cover 6 sector 9 edges abut the concrete mass and take a horizontal position, resting on the bottom of the bunker (along the entire perimeter). Locks 10 fix this position. Next is the molding of the concrete mix. When the movable cover moves back up, the fixed sectors 9 remain in the same horizontal position.

Claims (1)

Claim Device for molding articles from concrete mixtures by ed. St. No. 365255, characterized in that, in order to improve the quality of the product due to more complete degassing of concrete mixes, the device is equipped with a bunker with an opening and a sealed lid, a nozzle with spring-loaded projections mounted in the upper part on its inner side, and the stamp has a concentric hole in the upper part, located under the opening of the bunker, and the lower part of the stamp is made of sectors pivotally interconnected with each other with clamps of their horizontal position.