SU740399A1 - Injection mould for pressure die casting - Google Patents

Description

(54) PRESS FORM for casting under PRESSURE

The invention relates to foundry. A known mold for the production of molten EDM models containing movable and stationary half-molds, a two-stage mechanism for pushing out castings consisting of two plates, one of which has pushers and counter pushers attached, on the other pushers and a limiter, elastic elements interacting with one of the plates 1. Such devices do not allow to avoid deformation of the casting bush during removal, require the use of a gating system of excessive rigidity, and also do not allow synchronizing the ejection of the castings with the work manipulator of the torus ... The purpose of the invention is to reduce the deformation of the casting bush and the rod of the torus pull rod when the castings are removed from the mold. This goal is achieved by the fact that the proposed mold is equipped with pneumatic (hydro) cylinders connecting the plates of the casting mechanism. FIG. the mold is depicted during metal pressing; in fig. 2 — mold, first opened; in fig. 3 - the moment of ejection of the casting from the mobile half-mold; in fig. 4 - the moment of the supply of the pushers, the input into the connector of the mold of the manipulator rod and the capture of the casting; in fig. 5 - the moment of separation of the pushers from the casting and its removal by the manipulator. The mold consists of a pedestal, including the plate 1, mounted on the movable plate 2 of the machine to be cast under pressure, and the plate 3, which is rigidly connected with the help of the rollers 4 to the plate 1; a movable half-form 5 mounted on the plate 3; the fixed half of the form 6, mounted on a fixed plate machine 7; plates 8 and 9, mounted movably on rolling pins 4. On plate 8, the pushers 10 are fixed, and on plate 9 - travel stop 11 and pushers 12. Plates 8 and 9 are interconnected by means of pneumatic (or hydraulic) cylinders 13. On a fixed plate The machines 7 are fixed to the stops 14, and on the plate 8 are counter-tilcadded 15. The casting 16 is located in the working cavity between the half-molds 5 and 6. The machine has a stop 17 Sem. FIG. 4 and 5). The casting is removed from the working area by gripping the manipulator 18 (see Figs. 4 and 5). . V.

The device works as follows.

Before pressing in the metal after closing the half-form 5 and 6 (see Fig. 1) air is supplied to the piston cavities of the cylinders 13. In this case, the plate 9 abuts against the plate 1, and the plate 8 through the counter thrusters 15 into the stops 14. Thus, between the plates 8 and 9, a gap is established a, and between the plate 8, stroke limiter 11 and plate 3 a gap c. Pushers 10 and 12 are flush with the working cavity of the mold,. .

After pressing in the metal and its ostivan, pressure is released from the piston cavity of the cylinders 13 and then the opening of the mold (see Fig. 2). The casting 16 is separated from the fixed half-mold 6. Then the pressure is again supplied to the piston cavities of the cylinders 13. and the plate 8 abuts against the plate 3, a gap is picked up in (see FIG. 3). half molds 5 and from pushers 12.

When the mold is fully opened (see Fig. 4), plate 9 abuts against stop G7 and stops. Nipi c: -the form continues to move until plate 3 reaches travel stop 11. Again, between plates 8 and 9 establish a gap a. Push the pushers 12 Up to the surface of the casting 16. Then the gripper of the manipulator 18 is inserted into the ram of the mold, move it to the side of the casting and the scoop; it pushes it beyond the press residue.

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Thereafter, pressure is applied to the-stem cavities of the cylinders 13 and the plate 8 is pressed against the plate 9, selecting a gap a; pushers 10 are detached from the casting. In this case, the manipulator bar does not experience a load due to the pull-off force, so the pushers 12 perceive this load. Then, the casting is removed from the connector. niiecc forms.

Since the bush does not experience large bending forces and is therefore not deformed, this eliminates the use of a press with an ostinite for straightening the bush. reduce metal consumption.

Claims (1)

Invention Formula A mold for casting under pressure, containing a movable and stationary half-form, a mechanism for ejecting castings., Consisting of two plates, one of which is fixed to the pushers and countertrust of the spruce, on the other - pushers and limiter y and with that in order to reduce the deformation of the casting mold and the manipulator bar when removing castings from the mold, it is equipped with piston cylinders connecting the plates of the mechanism for ejecting castings. Sources of information taken into account in the examination l.ABtopCKoe certificate of the USSR 526437, cl. B 22 D 17/22, 1974.