SU653022A1 - Multiblock press head - Google Patents

Description

I

FIELD OF THE INVENTION The invention relates to drinking production, in particular to equipment. for the manufacture of molds by pressing.,

A known multi-die press head of a molding machine comprising a block of communicating cylinders with plungers, at the end of which the clamp blocks ij and 2 are located.

The proposed head differs from the fact that it is equipped with a hydraulic cylinder with a floating piston connected to a block of communicated cylinders with plungers / This allows: to simplify the design and increase its reliability.

To regulate the force on the individual pads, each plunger is provided with a replaceable counter-rod. Fig, 1 shows the proposed head, a section; in fig. 2 is a view along arrow A in FIG. one; in fig. 3 shows the head, the position before the start of pressing; in fig. 4 - the same, in pressing; in fig. 5 - the same at the end

pressing; in fig. 6-12 are diagrams of technological methods of pressing of casting molds with the proposed head.

In the holes of the housing 1 of the head there are working cylinders with plungers 2, at the ends of which pressure pads 3 are fixed. The working cavities of the cylinders are combined with a closed reservoir 4 filled with liquid. Each plunger has a replaceable counter rod

5, the free end of which extends beyond the reservoir 4 under the cover

6, mounted on the body 1 of the head. The tank 4 is connected by a hole of a large section with the cavity B of the cylinder compensator 7, inside of which is located the floating piston B.

Pressing of casting molds with the head is carried out by forcibly immersing its pads into the molding mixture by moving the head to the fixed rigging (model pit with the flask, filling frame and the mixture) or by moving

key to fixed head. On the kinematic scheme, see FIG. 3, 4 and S) shows the displacement of the hydrodipydrom 9 head.

The original position of the head before pressing starts is shown in FIG. 3. All plungers 2 are extended, the floating piston 8 of the cylinder-compensator 7 is in the lower position (it touches the lower cylinder cover). By means of the hydraulic cylinder 9, the head moves to the tooling. In the process of plunging the pressing blocks 3 into the molding mixture under the action of the resistance that it provides, all the plungers are sunk, displacing the scrapping of the liquid from the reservoir 4 into the compensating ziping 7, until the floating piston 8 is lifted, it touches the upper cover of this The situation corresponds to the start of pressing the mixture into separate pads (see Fig. 4).

The capacity of the cylinder compensator is chosen to be equal to the capacity of the liquid squeezed out by pressing the plungers on a part of their working stroke, for example, at half. This is necessary for pressing raiD pads from the beginning to the end of the process.

Upon further immersion of the head into the mixture, lowering one of the plungers by a certain amount causes any other to extend to the same type or extend simultaneously to several plungers, the sum of which is equal to the stroke of one recessed one. The position corresponding to the end of pressing is shown in FIG. five.

The movement of the head is stopped when the sum of the resistances of the mixture under all the pads 3 is equal to the force developed by the cylinder 9.

Above is a description of the operation of the software for the main technological variant - pressing with separate blocks from the beginning and end of the process. In addition, several more technological methods of pressing or their combinations can be made by locking the exit of liquid from the cavity B of the cylinder-compensator 7, not connected to the reservoir 4 of the head 1, or by supplying it with liquid under pressure, as well as changing the profile of an individual bobbin:

e) pressing with a flat plate from the beginning to the end of the process (see Fig. 6 /. Liquid exit from the cavity B of the subindra

7 is blocked, all pads are flat of the same height.

2) pressing the profile plate from the beginning to the end of the process (see Fig. 7). The liquid outlet from the cavity ff of the cylinder 7 is closed, the individual pressing blocks of a different profile forming the common given profile of the plate.

3} pressing individual cores from the beginning to the end of the process (see Fig. 8). Fluid output from the cavity B to cylinder 7 is free, the press pads of different profiles.

4) pressing at the beginning of the process with a flat plate (up to a predetermined pressure) with a gradual transition to extrusion with separate blocks (see Fig. 9.) Liquid under pressure is continuously supplied to the cavity B of the cylinder 7) pressing a profile plate (up to a predetermined pressure ) with a gradual transition to pressing separate profiled pads (see Fig. 10). Fluid under pressure Ruppr is constantly supplied to the cavity B of cylinder 7.

6) pressing with separate blocks (see Fig. 11), and then re-heading with a flat plate (see Fig. 6). When the first course of the fluid outflow from the cavity into the cylinder-compensator 7 is open. During the second stroke of & TOT, the output is closed at the lower position of the piston 8.

7) pressing the model with a profiling plate on the counter-mold flask (see Fig. 12).

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Claims (2)

1. A multi-trimming press head of a molding mask containing a block of communicating cylinders with plungers, at the end of which press presses are located, characterized in that, in order to simplify the design and increase its reliability, it is equipped with a floating-piston hydraulic cylinder connected to the block of communicable cylinders plungers. 2. Multi-press head according to claim 1, with the fact that, with the force control circuit on separate pads, each plunger is provided with a replaceable counter rod. Sources of information taken into account in the examination. 1.Catalog Foundry equipment, 1963, Models 91271B and 91271. 2. The US patent Mo 3220066, CP. 22-41, 1961. ue.J y / zy . : -: ,, ,,.,. - f,. . / V. .., -:, 1 - - V ".. --- .... -  . ., -; -. . Y / 7 ///////////// /// ji ("I Fig.Z 653022 Y /// fW 7 /// L ; .-.,. --- .-. .-iv - -.- Ch-; /; .: - v-: -:. :: -.: - ::: ..- ;; - t .. f , : i; -.--- v .- -. .. ..-- .. / .. --r--. “...- .. .. ... ..- l.-. I4 ..-; - w mm mm //// 7 // m :Phil V.. . -......-... F uuchchuch X4XSiSXvCv gx w / z I X V-- - v-vvv  .1 II V YY Y / 7 ///// 7 / // XX / xVy yy / V, j fynp -  //////////// L fynf t4Yvy V4NK V4 VV4Vvj I //// 77 // A 7 /////////// 7У7 / 7/7 vTTiV-. .: ::;:.: .. i-vV; .. v, .1 ... t  i v ;: tz V77 7f777Jrfn .Oz CVV4vyv fiai.tt