SU1315120A1 - Mould with two-stage knock-out system - Google Patents

Abstract

The invention relates to foundry, in particular to casting in metal molds. The purpose of the invention is to increase the ejection stroke without increasing the size of the mold. The mold contains traverse 1 with a fixed half-form 2 and movable traverse 4 with half-form 5. Two hydrocylin SL m K P are placed on the traverse 4

Description

core 6 with rods 7, which can interact with ejection plates 8 and 9, between which short-stroke pushers O and counter-pusher 11 are installed. Hydraulic cylinders 12 with rods 13 are mounted on plate 8 ejs push-pull 13, on which long-stroke pushers 14 are mounted. After the casting hardens 18 movable yoke 4 with half-form 5 from the water up the cylinder 16, then the guide

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The invention relates to foundry, in particular to casting in metal molds.

The purpose of the invention is to increase the ejection stroke without increasing the shape of the mold.

FIG. 1 shows a mold in a pouring position; in fig. 2 — node I in FIG. I; in fig. 3 - casting mold after ejection of the casting

The mold contains traverse 1, to which the fixed mold 2 and metal conduit 3 are attached to supply metal to the mold from a hermetically sealed furnace (not shown), and traverse 4 with mold half 5. On the traverse 4 there are two hydraulic cylinders 6 with rods 7 having the ability interactions with the pushing plates 8 and 9, between which short-stroke pushers 10 and counter-pusher 1I are installed. Hydraulic cylinders 12 with rods 13 are fixed on the ejection plate 8, on which long-stroke pushers 14 are installed using a detachable connection, and the diameter of the rod 13 is less than the diameter of the pushers 14 by 3-4 mm, and the hole 15 of the plate 8 through which the rod 13 passes is less than the diameter pusher 14 1.5-2.0 mm. The yoke 4 is mounted for vertical movement by means of a cylinder 16 attached to it (not shown) and is made with holes 17 whose diameter exceeds the outer diameter of the hydraulic cylinder 12, which allows them to be mounted on the plate 8 with the possibility of going beyond the shape .

315120

The cylinders 6 of the ejection plates 8 and 9 are lowered to the lowest position — the first stage of ejection of the casting is carried out by the stroke of the short-stroke pushers. After the completion of the first ejection step, the sensor 19 transmits a command to turn on the hydraulic cylinders 12, while the long stroke pushers 14 produce

further ejection of the casting. 3 il.

The half-molds 2 and 5 form a cavity for forming the casting 18. A sensor 19 is installed on the upper mold 5 and sends a command to turn on the hydraulic cylinders I2 after the end of the movement of the plates 8 and 9. The pushing plates 8 and 9 and the mold half 5 are connected to each other by centering cochunkes (not shown ).

The device works as follows.

Using the installation, a fan impeller was cast for drying hay with an outer diameter of 1100 mm and a sleeve height of 200 mm from an aluminum alloy.

From the sealed furnace through the metal pipe 3, the mold cavity formed by the semi-molds 2 and 5 is filled with the liquid metal. After casting 18 has been formed and solidified, the moving rider 4 with half-mold 5 is pushed up by cylinder 16. Then the hydraulic cylinders 6 of the ejection plate 8 and 9 with short-stroke pushers 10 and long-run pushers 14 lowered to the lowest position (Fig. 3). In this case, the first stage of ejection of the casting is carried out for the stroke of the short-stroke pushers 10, i.e. for the fan impeller 80 mm. After the first ejection stage is completed, the sensor 19 transmits a command to turn on the hydraulic cylinders 12, and the long stroke pushers 14 further eject the casting 18 (for the impeller of the fan, this stroke is 125 mm).

After the second stage of ejection, the casting is completely released from the mold (Fig. 3) and, under the influence of gravity, falls onto the turning arm (not shown) to remove the castings. After the first ejection stage, the casting is completely undermined from the mold and minor efforts are needed to further eject it, so the hydraulic cylinders 12 may have less power than the cylinders 6. Thus, to manufacture the fan wheel, the force of each hydraulic cylinder of the long stroke pushers is 2 tons, while as the force of the hydraulic cylinder 6 is 20 tons. In order to avoid casting skewing during the second stage of ejection, it is necessary to install at least three hydraulic cylinders 12 and si1metrically position them but mold center or establish a central cylinder.

After removal of the casting 18 beyond the limits of the installation, the rods 7 hydraulic cylinders 6 and the rods 13 hydraulic cylinders 12

moving to the uppermost position, the molds 2 and 5 are closed and the counter pushers 11 return the plates 8 and 9 with the pushers 10 and II and the hydraulic cylinders 12 to their original position (Fig. 1). The process is repeated.

The use of the invention makes it possible to increase the course of extrusion of castings without increasing the overall dimensions of the mold.

In addition, there is no need to manufacture push plates for long-stroke pushers, which simplifies the design of the device.

 5 Formulas

the invention

The mold with a two-stage ejection system, comprising half-molds, an ejection plate with short-stroke pushers, an ejector plate drive and long-stroke pushers, characterized in that, in order to increase the ejection stroke without increasing the size of the form, the long-stroke pushers are equipped with independent drives attached to ejection plate.

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Compiled by L. Zhukov Editor G. Volkova Tehred I.Popovich Proofreader I. Muska

2238/8

Circulation 740 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

15 claims A mold with a two-stage ejection system containing half-molds, an ejection plate with 20 short-stroke pushers, an ejector plate drive and long-stroke pushers, characterized in that, in order to increase the stroke, after casting 18 is removed from the installation, rods оки of hydraulic cylinders 6 and rods 13 of hydraulic cylinders 12 of pusher without increasing the dimensions of the mold, long-stroke pushers are equipped with independent drives fixed to the ejection plate.