SU1366279A1 - Stepped gating system for stack casting of moulds - Google Patents

Abstract

The invention relates to foundry, in particular, to gating systems. The aim of the invention is to improve the quality of casting by slagging and removing laziness from the form of gases. Step gating system works as follows. Liquid metal from the casting bowl 10 through the main one hundred to 4 enters the horizontal channel 2, and from it into the slag trap 3 of the upper half-mold and at the same time into the additional hundred to 5 lower half of the mold. From the slag-trap 3 of the upper half-mold, the metal flows through the feeders 8 to the castings 9 of the upper half-mold. At the same time, from the additional stand 5, the metal enters the horizontal channel 2 of the underlying half-form: and further along the separator 3 and the feeders 8 enters the half-molds located in the machine tool. 2 Il. ) (L

Description

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The invention relates to foundry, in particular, to gating systems.

The aim of the invention is to improve the quality of the casting by improving pshakosadzhali and removal from the form of gases.

Figure 1 schematically depicts a mold; figure 2 - section aa in figure 1; on fig.Z - section bb in figure 1.

A stepped runner system consists of several half-forms 1, each of which has a horizontal channel 2 intersecting a slag catcher 3. On a horizontal channel 2 on both sides of the slag-catcher 3 there is a main station for 4 and an additional station for 5. In tables 4 and 5 in Kakhsda half-form are alternately installed a plug 6 and an additional one on the plug 7. Feeders 8 connect the casting 9 with a slag-trap 3. On the top half of the mold 1 above the center 4, a casting bowl 10 is installed.

The stepped runner system works as follows.

Liquid metal from the casting bowl 10 through the main one hundred to 4 posts to horizontal channel 2, and from it to the slag catcher 3 of the upper half-form and at the same time to the additional hundred to 5 underlying half-form. From the slag-trap 3 of the upper half-mold, the metal flows through the feeders 8 to the castings 9 of the upper half-mold. At the same time, from the additional drain 5, the metal enters the horizontal channel 2 of the underlying half-form and further along the slag-trap 3 and the feeders 8 enters the half-form underlying the pile. .

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Since in the slag trap 3 of each half-form there is no flow-through movement of the metal and it comes out of the slag-trap 3 only to the castings of its half-mold, good conditions are created for separating and retaining the slag in the slag-trap 3. Since there are additional (non-working) in the bottom part

JQ of the stack 5, additional plugs 7 are installed, the non-operating sinks 5 remain empty of the metal during the entire casting time.

All this contributes to a good removal through the porous material of the caps of gases contained in the liquid metal of the slag-trap 3 and the mold. Plugs 6 and 7 are made of a gas-permeable rod mixture.

20 Thus, the proposed stepped gating system provides high quality castings produced in stack molds.

Claims (1)

25 claims A stepped runner system for stack casting of molds, containing the main stand, slag catchers, feeders, additional stand and plugs, successively installed in the upper part of one of the rungs in each half-form, characterized in that casting by improving the slag-holding and removal of gases from the mold, it has horizontal channels connecting the slag-traps with sinks and additional plugs, 40 installed in the lower part of the same stand in each half-form, while the stands are located on both sides of the slag catcher. 35 / X T eight Editor Y. Sereda Compiled by M. Archincheev Tehred I. Popovich cpus.i A a phi5.2 Proofreader L. Pilipenko