SU1215856A1 - Method of casting into porous chill mould - Google Patents

Description

The invention relates to foundry, in particular to casting in permanent forms.

The purpose of the invention is to improve the quality of castings.

The drawing shows the micropores chill, section.

The chill mold contains two microporous popokoknl 1 and 2 with hermetic walls 3 and 4, sealed at the connector with an elastic gasket 5. In the upper half-chill lip is made 6, the system 7 of gas cooling and ejection of the casting consists of canals 8 and 9, filled in two polukokil x , a shut-off valve 10 of the sprue channel 6, gas outlets 11 and 12 with controllable valves 13 and 14.

The casting method is carried out as follows.

The metal is poured through the sprue channel 6 with the shut-off valve 10 open and the outlet ports 11 and 12 for gas. Immediately after the metal is filled, the gate valve 6 closes the gate 6, presses the valves 13 and 14 on the outlet ports, and injects gas into the channels 8 and 9 of the cooling system and ejecting the casting. During the hardening of the metal, the gas pressure in the channel 8 of the upper semi-coal is kept higher than in the channel 9 of the lower semi-coal, which prevents the metal from being forced into the sprue channel. Bypassing the gas through the pressure valves 13n14 from the metal mold to the outside, the metal is cooled down by the pressure of the gas. When

Compiled by L. Zhukov. Editor S. Lyzhov. Tehred O. Niece. Proofreader V. But ha

Order 935/12. Circulation 757 Subscription

VNIIPI USSR State Committee

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

Branch PIP Yatent, Uzhgorod, st. Project, 4

the casting will harden, using control valves 13 and the gas pressure relative to

14 pressures are pre- in the lower semi-upper,

five

five

0

five

0

In principle, the mold is partially partially opened within the amount of compression of the elastic gasket 5 along the contour of the mold of the mold, then it is closed using pressure valves 13 and 14 and exceeds the gas pressure in the upper semi-chill relative to the bottom. The chill mold is finally crushed and the casting is pushed out from the top of the chamomile, and after it is opened, from the lower opened half-chill.

As a result of the overpressure of the gas in the lower half-chill and the opening of the chill, the casting from the lower half-chill in the pressed state to the upper half-piece without blistering occurs.

Example. The following modes are recommended for carrying out the method of pouring into a microporous chill mold:

The value of ajar-;:,

vanilla mold, mm Up to 10

Speed of opening of chill mold, mm / s Up to 10

Pressure difference

gas to semi-coal x

in the process of opening the chill,

MPaDo 0.6

The use of the invention will make it possible to improve the quality of castings with deep cavities, filled, in both semi-molds, by preventing warping when they are extracted from the chill mold.

Claims (1)

METHOD FOR CASTING IN MICROPOROUS CHICKEN, including casting the alloy, solidifying the casting, opening the chill mold and simultaneously pushing the casting out using the gas system from one half-mold, and so on, so that, in order to improve the quality of castings, after The alkali of the casting from one mold half is closed and, when re-opened, the casting is pushed out from the other mold using a gas system.