SU1036541A1 - Vibration percussion platform for moulding products of concrete mix - Google Patents

Description

The invention relates to the manufacture of precast concrete and reinforced concrete products.

A known vibro-impact platform for molding concrete mix products, comprising a movable frame with an anvil plate mounted on one of its ends with an elastic buffer element and a spring-loaded unbalanced pathogen of horizontal directional oscillations of Cl 3.

However, this vibro-shock platform is characterized by an insufficiently high quality of the molded products and an insufficient intensity of the compaction processes of concrete mixtures.

Closest to the invention is a vibro-impact platform for forming concrete products containing a horizontally movable frame mounted on the base by means of rollers with an end plate mounted on one of its ends with elastic buffer elements in contact with at least two unbalanced exciter sections spring-loaded with them horizontally directed oscillations zj.

A disadvantage of the known vibro-impacting platform for the molding of concrete products is the longer the compaction time of the products.

The purpose of the invention is to reduce the compaction time of products.

This goal is achieved by the fact that in a vibro-impact platform for molding concrete products containing a horizontally movable frame mounted on the base with rollers with a support plate mounted on one of the ends with elastic buffer elements 1 mI | In contact with at least two spring-loaded sections of unbalanced exciter of horizontal directional oscillations, sections of the exciter of horizontal directional oscillations are made with common-mode unbalanced positioning, equal masses and equal disturbing force, are mounted symmetrically relative to the support plate, and the gap between them and the elastic buffer elements is determined yut on e - (1,5-3.0) Rd

(+ Im)

where Pg is the disturbing force of each

unbalance excitation section, bodies of horizontal oscillations;

 the weight of the horizontally movable frame; the total mass of the horizontal excitation oscillations;

angular frequency of oscillation.

Fig. 1 schematically shows a shock platform for forming concrete products, a general view in section; figure 2 is the same, the view in the plan;

The vibro-shock platform for forming concrete products consists of a horizontally movable frame 1, on which mold 2 is mounted and supported by rollers 3 on the base 4. At one end of the movable frame t a stop plate 5 with buffer elements 6 is mounted and having two-way elastic coupling 7 of section 8 and 9 of a decelerated, horizontal excitation oscillator, located coaxially and opposedly.

When mounting the vibro-impact platform 0 between oscillation exciters and buffer elements, a gap (e) equal to

e (-f, 5t3o;

u;

It follows from the formula that the gap size is 1 times the ratio of the disturbing force of the vibrators to the product of the total value of the reduced mass of the moving frame and. airborne masses per square of the angular frequency of oscillations.

The rotation of the unbalance exciter shafts is carried out by the electric motor 10 through the synchronizer 11 and the cardan shafts 12. The vibrating shock, the platform for forming concrete products works as follows.

On the movable frame 1 is installed form 2 with a concrete mix. Then, the electric motor 10 is turned on, the rotation of which shaft through the synchronizer 11 and the cardan shafts 12 is transmitted to the shafts of section 8 and 9 of an exciter of horizontal-directed oscillations. Under the action of the disturbing forces of section 8 to E of the exciter, horizontally directed oscillations alternately strike buffer elements 6 located on the support plate 5 rigidly connected to a horizontally movable frame 1 on which form 2 is installed with a concrete mix. Since between the buffer element b and sections 8 and 9, iaasop is set at 1 times the ratio of the disturbing force of the vibrators to the product of the total. R. wasps (6.0 - “, 0) (103 10 t5 20 1. Is the oscillation amplitude of the horizontal frame; RD is the disturbing force of the sections of the unbalanced exciter of the horizontal directional oscillations; the added mass of the horizontally mobile equal we; Zfri is the total mass of the sections of the decelerated exciter of horizontal directional oscillations; W is the angular frequency of oscillation.

Claims (1)

VIBRATING AREA FOR FORMING PRODUCTS FROM CONCRETE MIXTURES, containing horizontal mounted on the base ·, by means of rollers;: but movable frame with mounted. at one end with a thrust plate t with elastic buffer elements in contact with at least two sections of the unbalanced exciter of horizontally directed vibrations spring-loaded relative to them, so that in order to reduce the time of compaction of the products , sections of the pathogen of horizontal directional oscillations are made with an in-phase arrangement * of unbalances, with the same masses and equal, disturbing force, mounted symmetrically with respect to the thrust plate, and the gap between them and elastic buffers and elements define .po formula b (1.5-3.0) P ^(m np§ where P _fl - perturbing force of each sec- tion, and the unbalance exciter β middle horizontal direction * | C PARTICULAR oscillations; w - Reduced mass of gori-E of an umbrella-moving frame; - the total mass of the unbalanced pathogen of horizontally directed oscillations; w is the angular frequency of oscillations.