SU975403A1 - Vibration platform for compacting concrete mixes in mould - Google Patents

Description

one

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

The known vibroplatform for compaction of concrete mixes in the form, containing a movable frame with an exciter of directional vibrations and a device for fastening the form in the form of a vacuum chamber with an elastic seal tl.

The closest to the technical essence of the invention is a vibroplatform for compacting concrete mixes in a mold, containing a movable frame with an exciter of directional vibrations, a device for fastening a mold in the form of a vacuum chamber with a hammer mounted on the movable frame 2.

However, these devices have low quality formable products, unreliability and high noise levels.

The purpose of the invention is to improve the quality of products by acting on the concrete mix with spatial fluctuations, increasing reliability and reducing noise levels.

This goal is achieved by the fact that in a vibroplatform for compacting concrete mixes in the form of soder; a movable frame mounted on the base by means of elastic supports

10 an oscillation pathogen and a striker placed in a vacuum chamber formed by an elastic closed closed between the bottom of the mold and the surface of the movable frame

15 with a seal, the movable frame is provided with L-shaped lugs in contact, by means of elastic elements, with the ends of the hammer, which is made with an anti-friction gasket on its

20 bottom surface.

Claims (2)

In addition, the vibrating plate is provided with additional elastic supports in contact with the form, with vertical, guide and adjusting elastic elements installed at their top and lower ends. The drawing schematically shows the proposed vibroplatform, a general view. A vibrating platform for compacting concrete mixtures in a mold contains a movable frame 3 mounted on the base 1 by means of elastic supports 2 with a circular vibration exciter k and a striker 5. The latter is placed in a vacuum chamber 6 which is formed between the bottom of the mold and the surface of the movable frame 3 closed along the perimeter, by an elastic seal 8 and communicated by Pipeline 9 with a vacuum pumping unit 10. The movable frame 3 is provided with L-shaped stops 11, which are in contact with the ends of the 5Pos impactor by means of elastic elements 12 The latter is made with gaskets 13 fixed to its upper and lower surfaces, with the antifriction gasket fixed on the latter. For shaping products exceeding the frame sizes, there are additional elastic supports And with vertical guides 15 for the shape, tongs 16 and adjusting elastic elements 17. The vibrating plate works as follows. A mold 7 filled with a concrete mixture is installed on the frame 3, which rests on the elastic seal 8 and the hammer 5 in the vacuum chamber. If the size of the form exceeds the size of the frame 3, then additional elastic supports 11 are used. In this case, the form 7 will additionally rest on the supports 16 with vertical guides 15 limiting (moving them, in the horizontal plane. Include vibration exciter k. Elastic seal B and the drummer 5 form a non-linear link between frame 3 and form 7. A fracture of the elastic characteristic. Achieving the resonant mode of a two-mass system (vibroplatzadform) is carried out by pre-selecting the parameters of the elastic compacted 8 and the impactor 5, if it is necessary to form articles in different mass forms, the system can be tuned to a resonant mode by adjusting the crimping of the nonlinear elastic coupling between the mold 7 and the frame 3, since each mass of the mold 7 corresponds to its non-linear compressive compressing force, which It is possible to regulate with the help of the vacuum value inside the vacuum chamber 6. During the operation of the vibrating plate, the vibration exciter k transmits circular oscillations to the striker 5- Only vertical shocks are transmitted from the striker 5 to form 7 Impacts, which ensure the compaction of the mixture in form 7. The horizontal component of the impact, due to the circular nature of the vibration of the single-shaft exciter 4, is realized in the movement of the striker 5 relative to the frame 3 along the plane of the anti-friction gasket 13, i.e. in a plane perpendicular to the axis of the vibrator and parallel to the bottom of the form 7. Elastic elements 12 serve to return the striker 5 to its original position, and the striker 5 protects the L-shaped stops 11 from vertical movements. Using the proposed vibrating plate will improve the quality of products and its operational reliability and reduce noise. Claim 1. Vibration platform for compaction of concrete mixes in the form, containing a movable frame mounted on the base by means of elastic supports with a vibration exciter and a hammer placed in a vacuum chamber formed between the bottom of the form and the surface of the movable frame closed elastic perimeter, characterized in that, in order to improve the quality of products by acting on the concrete mix with spatial oscillations, increasing reliability and reducing noise, the mobile sleep frame wife L-shaped stops in contact by means of elastic elements with ends of the striker which is arranged an anti-friction lining on its lower surface. 2. The vibrating platform according to claim 1, characterized in that it is provided with additional elastic supports in contact with the form with, respectively, installed on their upper and lower ends, vertical 3 3 guides and adjusting elastic elements. Sources of information taken into account in the examination 1, USSR Copyright Certificate No. 372066, cl. B 28 B 1/08, 1970. 2. USSR author's certificate number 588116, cl. B 28 B 1/08, 1975.