SU148342A1 - Apparatus for making hollow products of reinforced concrete - Google Patents

Description

Devices for manufacturing hollow articles made of reinforced concrete with preformed necrodal reinforcement are known, including a hydraulic piston unit with a pressing chamber, hauling and roller conveyors, a curing chamber, a circular saw, a frame for rebar holders, a guide, a device and tension brakes.

The described apparatus for making hollow reinforced concrete products differs from the known ones in that the product walls are molded in it between the wedge-shaped surfaces of the vibropressor inserts and the mouthpiece, which are simultaneously pulled through the pressing chamber.

Such an embodiment of the device allows for the combination of pressing with vibration to provide a uniform high degree of compaction of the concrete mix.

FIG. 1 shows a molding machine with a partial cut; in fig. 2 is a schematic diagram of a vibropress press with a partial section; in fig. 3 is a diagram of a wire clamping device; in fig. 4 is a diagram of a tension brake device.

The device for the manufacture of hollow products from reinforced concrete is a press-forming machine, the main forming part of which is a conventional vibrating-horizontal press of horizontal action,

The vibrating press consists of two working cylinders 1 with guide columns 2, in which the moving widths 3, which are connected pivotally to the cross beam 4, mix. The press case 5 forms the guide boards 6 along which the moving plate 7 moves with the hopper 8 From the front, the casing of part No. 148342-2 is covered with a locking plate 9. The tension of the station consists of guide rollers 10, clamps // wire, tension brake 12 and meter 13 of tension.

Inside the press casing 5, the pressing mouthpiece 14, vibro-pressing inserts 15 and punches 16 are placed. The movable plate 7 has a receiving hopper 8 for concrete at one end, another with screws 18 with nuts 18, driven through an axis 19, and conical gears on the other. 20 and a gearbox with an electric motor. The vibropressor liner 15 consists of a pull-in vibrator with unbalance vibrators 21 and a vibro-press cutter 22, which has (along the perimeter) a variable wall thickness and wedge-shaped sections.

The clamp 11 of the wire has two clamping jaws: a fixed 23 double and a movable 24 single. The sponge 24 using the spring 25 presses the steel wire 26 to the fixed sponge 23 and clamps it to a predetermined force. Both jaws 23 and 24 are set normally one to the other, have oval rounding for passing thickened joints between individual wires. The springs 25 return the sponges to their normal position after the wire connection has passed through them and prevents the wire from loosening.,

The tension brake 12 consists of a drum 27 having grooves for better interaction with the wire. The drum rotates around the stationary axis 28 and is braked by the action of the adjustable springs 29 using brake pads 30.

The device for making hollow articles of reinforced concrete works according to the following technology.

The ends of the wires from the coils 31 are passed through the guide rollers 10 and the clamps //, wind onto the drum 27 of the tension brake 12 and are inserted through the distribution cassettes of the extension beam 4 and the stop plate 9 into the pressing chamber, from where they are postpiled into the replaceable traverse slots and secured. The replaceable traverse is connected to the driven drums of the 32-th brawl conveyor 33 by steel cables that wind on the drums, move the replaceable traverse, and the wires are initially tensioned.

The prepared rigid concrete mixture is fed to the receiving bin 8. When moving the movable plate 7, the bunker comes off the locking plate 9, the concrete mix enters the pressing chamber, where, under the influence of off-balance vibrators 21, it begins to fill the entire formable chamber space. After laying the concrete mixture, the hopper and the movable plate are returned to the idle / shut position, locking the pressing chamber. The hydraulic conduit 34 of the working cylinders 1 of the press is turned on, the plungers 35 begin to move the longitudinal yoke 4 with the pressing mouthpiece 14, the vibropressor inserts 15 and the punches 16, which with their wedge sections slit the concrete mix to a predetermined compaction value. When the mouthpiece and vibropressor inserts reach the locking plate 9, the hydraulic drive is turned off and the drive conveyor 33 is turned on. and the press molding cycle is repeated. The molded bar 36 of the product, moving along the roller conveyor 37, passes the hardening chamber 38 and falls under the friction belts 39 of the thrust conveyor 33. Upon leaving the traction conveyor, the bar is removed from the end of the bar and the bar moves to the cutting post Saws 40No. 148342-4 The proposed device for making hollow products from reinforced concrete allows Continuous vibration proof molding of stress-reinforced multi-hollow reinforced concrete products with a high degree of compaction.

NIIzhelezobeton notes the usefulness of the proposed device, which allows to obtain a better compaction when combining pressing with vibration.

Subject invention

A device for manufacturing hollow articles made of reinforced concrete with prestressed longitudinal reinforcement, including a hydraulic piston unit with a pressing chamber, traction and roller conveyors, a curing chamber, a circular saw, a frame for retaining wire coasters, a guide device and tension brakes, characterized in that , in order to ensure a uniform high degree of compaction of the concrete mix, the formation of the walls of the product in it is carried out between the wedge-shaped surfaces of the vibro-pressing liners and The blades are simultaneously pulled through the press chamber.