SU141791A1 - Shnekovy press Ilyevich A.P. for continuous molding of concrete and reinforced concrete products - Google Patents

Description

Screw presses for the continuous molding of concrete and reinforced concrete products are known, including a housing, a receiving box, a mouthpiece and a drive. However, these presses do not provide a normal passage of the concrete mixture through the head.

In the described press for the normal passage of the concrete mixture through the head and increasing its reinforcement, the press head has a cross section (ratio of the annular area at the location of the auger vane tips to the cross sectional area of the finished product) to 1.7, but it may not exceed 1. The auger blades of the screw enter inside the head and are directed at an angle exceeding 80 ° to its surface, and the angle at the top of the head is not more than 80 °. To prevent the concrete mixture from turning in the head, the inner surface of which has a smooth transition from round section to the section of the product, the corrugation, grooved and grind, or only faceting of a part of the inner surface adjacent to the press die are used. The slippage of the concrete mixture in the direction opposite to its movement is eliminated by the adopted elevation angle of the screw line of the auger blades in the range of 11 to 15 °. The alignment of the speed of movement of the concrete mixture over the cross section of the flow occurs due to the fact that the blades of the screw are inclined to its axis at an angle from 10 to 15 °. In order to evenly feed the screw, press the concrete mixture into the space between its blades, eliminate its accumulation in the receiving box, and assist the blades of the screw in pushing the mixture along the press, an indented roller is installed in the receiving box.

FIG. 1 shows a press (top view); in fig. 2 - press head in section.

A twin concreting press for continuous molding of concrete and gel 141491-- 2 consists of a body /, a plate feeder 5, a receiving box 3, a screw 4, a pressing roller 5, a head 6, a mouthpiece 7 and a drive 8.

: A concrete mix prepared on a concrete mixer is supplied to the rake of an empty plate 9 of the feeder 2, where the centrifugal force is thrown out by the centrifugal force -r to the casing 10, then moved to the knife, cut it, and directs it to the tray U2. From it a mixture comes | .in the receiving box - 5. Here it is pressed by a roller between the blades 13 of the screw 4, which moves it through the body / and the holoks 6.

When passing through the head 6, the mixture entrains the armature, which is fed into the head through the fixed core 14 inside the screw 4, and then with it the expansion blades 15 pushes along the corrugated surface 16 and through the mouthpiece 7 to the outside. The molding of the bar occurs in the head 6 and the mouthpiece.

The described press allows us to simplify the technological process of manufacturing concrete and reinforced concrete products by eliminating the thermal and moisture treatment operations, reducing the park of forms and significantly increasing productivity, as well as significantly reducing the consumption of cement. The prototypes of the press successfully passed production tests at the Karacharovsky Mechanical Plant, and according to the author's application, he is able to produce compacted reinforced concrete bar at a speed of over 5 m1 min, and the bar can have any cross section.

Subject invention

Claims (5)

1. Screw press for continuous molding of concrete and reinforced concrete products, including a housing, a receiving box, a mouthpiece and a drive, characterized in that, in order to ensure the normal passage of the concrete mixture through the head and dragging the reinforcement to the concrete mix, the press head has a section differential (ratio annular section at the location of the screw auger blades to the cross-sectional area of the finished product) to 1.7, but may be less than 1, moreover, the rotary blades of the auger go inwards and angle at more than 8 0 ° to the surface of the head, having an angle at the vertex of up to 80 °. 2. A screw press according to Claim 1, characterized in that, in order to prevent the concrete mixture from turning in the head, its inner surface, having a smooth transition from circular section to section of the product, is made fully or partially corrugated, corrugated and faceted or only faceted. in the part adjacent to the press munlshtuku. 3. Shpekovy press on PP. 1 and 2, from the viewpoint of the situation with the fact that, in order to prevent the concrete mixture from slipping in the direction opposite to its movement, the elevation angle of the screw line of the auger blades is taken in the range from I to 15 °. 4. Screw press on the PP. 1-3, characterized in that, in order to equalize the speed of movement of the concrete mixture over the flow section, the auger blades are inclined to its axis at an angle in the presets from 10 to 15 °. 5. Screw press on the PP. 1-4, characterized in that, in order to ensure uniform feeding of the screw by the concrete mixture and pressing it into the space between its blades, an inlet box is installed in the receiving box, which also eliminates the accumulation of the mixture in the receiving box pushing the mixture along the press.