SU749663A1 - Unit for moulding concrete mixes - Google Patents

Description

A mold funnel is fitted with an attachment for feeding concrete into the mold under pressure. A device for feeding concrete into a mold under pressure can be made in the form of a drive shaft, on which removable discs are fixed, in the space between which knives are placed rigidly on the walls of the forming funnel. The surface of the interchangeable discs can be covered with plates of wear-resistant steel with holes or plates of compressed grinding grain. The tamping device is made with a replaceable working body, and the calibrating device with an adjustable counter-load.

FIG. 1 schematically depicts the proposed installation; in fig. 2 / green I in FIG. 1; in fig. 3 shows section A-A in FIG. one.

The device for forming concrete mixes consists of a portal 1, a movable platform 2, a hopper 3c with a feeder 4, a forming funnel 5, a tamping and sizing device and a mold. The molding funnel has a housing 5, a device for feeding concrete into the mold under pressure, consisting of replaceable disks b, a drive shaft 7 and legs 8, a replaceable nozzle 9, a mechanism for lifting and starting the funnel 5, consisting of four shafts with screw cuttings 10 mounted into the platform, fixed nuts 11 and nuts 12 rotating in bearings. Nuts 12 protruding from the platform are fitted with star gears 13 with chain gear 14. The gear 12 connected to the drive 15 is mounted with a bevel gear 16 which is engaged with driven through bevel gear 17. The tamping device consists of a impact plate .18, a support plate 19 with rollers 20, four rods 21, sliding in sleeves 22, a platform 23 with shock absorbers 24. On a platform 23 an eccentric drive consisting of shafts 25 with eccentric cams is mounted 26.. Shafts 25 are engaged with each other via gears 27, one of the gears is connected to the electric drive 28. The lifting and lowering mechanism of the platform 23 is similar to the lifting and lowering mechanism of the FARING (11-17). The calibration device consists of a calibration shaft. 29, an electric motor with a V-belt drive 30, a supporting frame 31 with an adjustable weighing device 32 hinged on the portal, and a lifting winch 33 of the calibrator over the form 3-4.

The installation for molding concrete mix works as follows.

The concrete mixture from the hopper 3 is fed by a belt feed 4 to the upper part of the funnel 5 and to the disks 6 seated on the drive shaft 7.

, Falling into the space between the discs, the concrete mixture is transferred to. the lower part of the funnel, where with the help of cutting knives 8, which enter the space between the disks, they are squeezed out into a removable nozzle 9. From the nozzle, the mixture is a continuous flow under

pressure (without breaks) enters the form 34 perpendicularly or at a certain angle to the pallet (depending on the nozzle configuration). 5 Filling the free space between the nozzle and the mold tray 34 and spreading over a certain area of the mold, the mixture is compacted by an amount equal to the frictional force between the surface of the rotating disks b, the walls of the funnel 5 and the concrete mix, as well as the weight of the concrete in the upper part of the funnel 5. Thus, subject to 5 the necessary clearance (for further compaction with a tamping device and a calibrating shaft) between the lower plane of the funnel 5 and the top of the form 34, the concrete mix is placed under pressure Istantsionno with great precision.

For forming articles of different heights and thicknesses, as well as for forming a face finishing layer from a spedbeton or multi-layered section, the forming funnel is equipped with

a lifting and lowering mechanism that moves the funnel 5 between the supporting structures of the movable platform 2. When creating a power reserve at the 0 drive of the forming funnel 5, production-. its water content can be changed by varying the number of revolutions within large limits.

The pre-compacted concrete mixture in force me 34 as the gantry 1 and the moving platform 2 move is affected by the impact plate 18 fixed on four rods 21 in guide sleeves Q. The sleeves 22 are mounted in

Claims (2)

supporting movable platform 2. The upper part of the rods 21 is fixed in the support plate 19, which through the rollers 20 using eccentric cams 26, which sit on the drive shaft 5, 25, tells the shock plate 18 to move vertically upwards. When the eccentric shafts move down the slab, 18 freely falls onto the surface of the concrete and compacts it. To eliminate the possible impact of the thrust plate 19 on the eccentric shafts, shock absorbers 24 are mounted on the platform 23. Installation of two eccentrics is. horizontal shifts are eliminated in synchronous phases. At a shaft rotation speed of 240 rpm, the fall height of the impact plate 18 is within 0.5 cm - 3 cm, depending on the profile and eccentricity of the cams. After ramming, the surface of the product is brought to the design dimensions either by a single calibrating shaft 29 or a forming funnel and a calibrating shaft. Depending on the nature of the concrete mix, the effect of the shaft may vary by changing its pressure by adding a load and changing its center of gravity. The proposed installation for shaping a concrete mix has the following advantages: remote manufacturing of products of any complexity and configuration is possible; the masses associated with it are transferred to the compaction entirely, on the platforms, extra energy is expended on lifting the form and overcoming its inertia during oscillations. Claim 1. An installation for molding concrete mixtures, containing a hopper with a feeder, a forming funnel and a mounting device installed on the portal, characterized in that, in order to increase productivity, technological capabilities and quality of manufactured products with the lifting and lowering mechanism installed on the portal between the calibrating device and the forming funnel, at the end of which a replaceable nozzle is installed, moreover before the replaceable nozzle in the forming funnel of the mouth Antenna device for supplying concrete in the form under pressure. 2. The installation according to claim 1, wherein the device for feeding concrete into the mold under pressure is made in the form of a natural shaft, on which are replaceable discs, in the space between which knives are placed rigidly on the walls of the forming funnel. 3. Installation according to claim 2, characterized in that the surface of the removable disks is covered with plates made of. wear-resistant steel with holes, 4. The installation according to claim 2, is characterized in that the surface of the interchangeable discs is covered with plates of pressed grinding grain. 5. Installation according to claim 1, characterized in that the rambukdee device in is made with a replaceable working body. 6. Installation under item 1, characterized in that the calibrating device is made with an adjustable counter-load. Sources of information taken into account in the examination 1. The author's certificate of the USSR 537820, cl. B 28 B 13/02, 1974. 2. Passport installation SMZH-166A. The manufacturer of the Kuibyshev plant Strsmaygina. f 34