SU1350013A1 - Arrangement for moulding articles from concrete mixes - Google Patents

Abstract

The invention relates to the field of building materials industry. The aim of the invention is to improve the quality of molded products. The device consists of a base 1 with a power cylinder 5 located on it, the rod of which is connected to the vibration exciter 11 connected to the die 6, at the bottom of which the grate 13 is fixed between its walls, which is simultaneously a tamper, the stamp element. Above the grate bars, between the gates, gable directions are set, not 14. When compressed air is fed into the piston space, the die 6 is lowered to a height corresponding to the thickness of the molded product. Under the influence of vibration, the concrete mixture acquires quasi-flowing properties and, through the gaps between the grate bars, uniformly fills the form throughout the entire area, while the grate bar vibrates the concrete mix, vibrates and compresses it. The same quality seal is achieved over the entire area of the mold. 3 il. . 1B J ОО СЛ о о) ps4 co (rig

Description

This invention relates to the manufacture of precast concrete products.

The purpose of the invention --- HOBbiujciine quality molded products, performance and simplify the design.

FIG. 1 shows a device, a slit, with a raised tamia; in fig. 2 - the same, and the mi stamp; in fig. 3 shows section A-A in FIG. S.

The device comprises a base 1 installed by means of threaded joints 2 and adjusting shims 3 on racks 4 fixed on the foundation (not guantized), and a pneumatic actuator 5 for vertical movement of the die 6 into the form 7. The pneumatic actuator is made in the form of a power cylinder with a piston 8 and rod 9 ,. passing through the sleeve 10 and connected to the exciter 11. The latter is rigidly fastened to the walls and there 6 by means of connections 12. The bottom of the stamp 6 is made in the form of evenly distributed grate 13 fixed to the walls of its body with a tamping concave surface on the underside and gables from the top and the gable guides 14 exchanged over the grates 14. The stamp is made with a cavity 15 to load the concrete mix. The form 7 is fixed under the punch by means of the device 16. As a vibration exciter, a two-chamber pneumatic 1D cuff can be used — a valve-induced vibration exciter, consisting of a body inside which the inertial mass 17 is located with the strikers 18 and 19. The striker 18 covers elastic cuff 20. forming a permanently closed detritus chamber 21. The latter is communicated by means of a channel 22, made in section 1.1, a supra pistvial space 23 and a sleeve 24 with a pressure source. The firing pin 19 encompasses an elastic cuff 25 with exhaust outlets 26 periodically sealing the power chamber 27 connected by channels 28 with the power chamber 21. The power chamber 27 is made with an active working area that is wider 21. In the case of the exciter 11, holes 29 are made, which connect its internal cavity with the atmosphere. Sub-piston space 30 is communicated with a pressure source by sleeve 31.

The device works in the following way.

The sleeve 31 serves compressed air to the sub-shaft design 30 of the power cylinder 5, in which an overpressure is created which forces the piston B to move upwards. At the same time, with the help of the property of the rod 9, the grill 6, connected with the causative agent 1 connection 12, also rises. Under the stamp is fed the form 7 and fixed;; | The fixture 16 is fed into the cavity 15, and then the die is pushed into the mold, for which purpose but the sleeve 24 enters the air space 23 Г1о.а, compressed air is needed. Stamp 6 cans on. for 0

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This value is due to the fact that the piston 8 rests on its lower surface in the upper end of the sleeve 10. The lower position of the die is determined by the adjusting shims 3. Thus, it is possible to mold products of different thickness at different height of the molds. Compressed air from the overgrown space 23 through channel 22 enters the permanently closed power chamber 21 of the exciter 11, formed by the elastic cuff 20, and from it through the channels 28 into the power chamber 27, sealed by the cuff 25. In the initial position when the inertial mass 17 is found in the lowest position; the exhaust holes 26 in the cuff 25 are blocked by the lower surface of the inertial mass, therefore the compressed air entering the exciter 11 creates an overpressure at once in both force chambers 21 and 27. Due to the active working area of the power chamber 27 more than the area of the chamber 21, it is created in the power chamber 21 lifting force overcomes the force developed in it and inertial mass 17 begins to move upward, squeezing and forcing the air out of chamber 21. At the end of its ascent, weight 17 with its upper striker 18 strikes the hull l 11 and creates a vibro-impact loading, passing through the stamp 12 to the link 6. At the end of the mass 17, the exhaust holes 26 in the cuff 25 open up, the pressure in the chamber 27 is applied, and the inertial mass is affected by self-pressure and pressure chamber 21 makes a downward movement, also a striking blow b. 19 on the body of the exciter, which again creates a vibration impact loading. When moving downward, the inertial mass 17 with its lower surface closes off the exhaust openings 26 in the cuff 25, the pressure in the force chamber 27 increases again, and the cycle repeats. The vibration exciter begins to work in vibro-impact mode.

With the start of operation of the exciter 1, the concrete mixture in cavity 15 acquires flow properties and starts to enter form 7 at intervals between, 1, the grate 13. Since the width of such intervals is the same, the speed is the same as the unit of time of the concrete mixture is the same; therefore, the form is filled with a concrete mixture evenly over the entire area. The uniformity of the feed also contributes to the guiding elements 14, which contribute to the preliminary distribution of the concrete mix in the cavity 15 between the grates 13. The concrete floor quickly fills form 7 below the grate level 13, which are vibratory impacting elements on compacted concrete mix. In this order, the mold is filled with concrete and its high-quality compaction is performed.

Claims (1)

Invention Formula A device for molding concrete products, comprising a base, a form, a stamp with a pneumatic actuator, its vertical movement and a vibration exciter, characterized in that, in order to increase the quality of the molded products, productivity and simplify the design, the stamp is made with a cavity for loading the concrete mix, and the bottom a stamp — in the form of uniformly distributed grates attached to the walls of its hull with a tamping concave surface and gable rails placed above the grates. "OX fe iSi jr.tiras Zfr-m - sSiSSt ZYE -5 zi