SU977167A2 - Apparatus for shaping articles - Google Patents

Description

(54) DEVICE FOR FORMING PRODUCTS

The invention relates to devices for forming articles from concrete mixtures. According to the main author. St. No. 447266, a device for molding articles is known, which contains a vibropunson, a matrix mounted on a bed, and a nibrostol with a bottom equipped with a mechanism for vertical movement of the matrix in the form of a power cylinder 1. The disadvantages of this device are the low productivity and quality of molding of products due to the fact that the transfer of oscillations from the vibrating table through the product to the vibropanse during the molding process, the latter can oscillate both in phase and in antiphase with the vibrating table. This circumstance leads to dissimilarity in the mode of forming the articles and, accordingly, to a decrease in their quality. The purpose of the invention is to increase the productivity and quality of the form. Wash products. This goal is achieved by the fact that the device for forming articles is equipped with an oscillation frequency regulator in the form of two ring mounted concentrums relative to each other with a gap of electromagnets, one of which is fixed on the vibro-punch and the other on the matrix. The drawing schematically shows a device for forming articles, a general view. A device for forming articles consists of a bed 1, a matrix 2 placed on it, a vertically movable vibropounson 3, a vibrating table 4 connected to the matrix 2 by means of elastic elements 5, a mechanism 6 of vertical movement of the bottom 7 of matrix 2 with a pallet 8, a pusher 9 and a vibrator 10 In addition, the device is equipped with an oscillation frequency regulator in the form of two ring electromagnets 11 and 12, mounted concentrically relative to each other with a gap, one of which is fixed on the vibro-punch 3, and the other on the matrix 2. Parameter electromagnet 12 (the size and number of turns) are selected from the conditions providing maximum strength of its interaction with an electromagnet 11. The electromagnet 11 parameters (dimensions, number of turns and wire diameter) are calculated in the size zavisilyusti vibropuansona 3 and force it to compress the surface of the molded article 13.

A device for forming articles works as follows.

Before the start of the molding, the concrete mixture enters the measuring box (not shown). Then, the tray 8, which carries the measuring box with the concrete mix, is fed to the bottom 7 of the matrix 2, which is in the upper position and is flush with its upper plane. The mechanism 6 moves the bottom 7 with the pallet 8 to the lowest position until it touches the plane of the vibrating table 4. The vibrator 10 is turned on and the concrete mix is pre-compacted. Next, the vibrator 10 is turned off and the vibro punch 3 is lowered until it touches the surface of the concrete mix, while the electromagnets 11 and 12 begin to interact. After that, the vibrator 10 and the electromagnet 11 are turned on again and the concrete mixture is further compacted. .

The oscillations of the matrix 2 through the molded product 13 are transmitted to the vibropanse 3, which begins to oscillate with some delay in relation to the matrix 2. When the punch 3 oscillates, an electromagnet 11 rigidly connected with it also oscillates, causing EMF 12 to induce. The magnetic field induced in the electromagnet 12 emf interacts with the magnetic field of the electromagnet 11 and thereby creates an additional resistance to the vibrating punch 3. By varying the current of the electromagnet 11, the magnitude of the additional resistance force is adjusted so that the vibropanson 3 oscillates depending on the molding conditions in the desired phase relative to to matrix 2:

After the completion of the sealing process from section 13, the vibrator 10 is turned off. The natural oscillations of the matrix 2, as a result of the interaction of the electromagnet 11 and 12, fade out smoothly and quickly, which eliminates the possibility of decompaction of the product 13. Next, the vibropanson 3 moves to the upper extreme position, the molded product 13 is pushed out by the pusher 9 from the matrix 2 and then removed. The device is ready to form the next product.

The proposed device provides not only an increase in the quality of the molding of products, but also makes it possible to increase productivity in the molding of products with embedded parts. Increased productivity is achieved by fixing the embedded parts on the punch using an electromagnet.

Claims (1)

Invention Formula Device for molding products according to ed. St. No. 447266, characterized in that, in order to increase the productivity and quality of the molded products, it is equipped with an oscillation frequency controller in the form of two annular electromagnets installed concentrically relative to each other with a gap of electromagnets, one of which is fixed on the vibro-punch and the other on the matrix. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 447266, cl. B 28 B 1/08, 1973.