SU1518074A1 - Tooling for manufacturing boxless moulds by vacuum-film shaping - Google Patents

Abstract

The invention relates to the field of foundry and can be used in tooling structures for making non-flask molds by vacuum film forming from loose sands with a sealing coating, sealed by vacuum. The aim of the invention is to expand the technological capabilities and improve the quality of castings. The rig consists of a bottom model plate with a vacuum cavity and a model, a flask of a bottom with a cavity 5, a vacuum wire consisting of two coaxially parallel branches 8 and 9 with a chamber 10 of the half-mold top 11 and a through-chamber 12 of the half-mold bottom 13, the fixing bushings 14 and fixing pin 15 with a through hole 16, a sealing coating, loose molding sand. The use of the invention provides an improvement in the quality of the castings and increases the percent yield of suitable cast. 3 il.

Description

ate

00

about

./

The invention relates to a foundry industry and can be used in tooling structures for the manufacture of non-core forms of vacuum-film forming in bulk sands with a sealing coating, strengthened by vacuuming.

The purpose of the invention is to expand technological capabilities and improve the quality of castings.

FIG. 1 shows the half-form "bottom, cut; in fig. 2 - safety form assembly; in fig. 3 - fixing elements in the collection.

Equipment for the manufacture of bezopochnyh forms of vacuum-film molding consists of a model base plate of bottom 1 with vacuum cavity 2 and model 3, flask of bottom 4 with cavity 5, vacuum wire 6, consisting of two coaxially parallel branches 8 and 9 with chamber 10 half-form top 11 and the through chamber 12 of the half-mold of the bottom 13, the fixing bushings 14 and the fixing pin 15 with the through hole 16, the sealing coating 17 and 18, loose molding sand 19.

The manufacture of flaskless forms is carried out as follows.

A bottom support 4 is installed on the sub-model bottom plate 1. The heated sealing 17 covers the inside of the bottom 4 flask with the bottom bottom 1 model and model 3 by evacuating the bottom 5 bottom cavity and the vacuum cavity 2 of the bottom bottom 1 plate. the semi-mold of the bottom 13 introduces a vacuum wire 6 consisting of two coaxially parallel branches 8 and 9, where in the branch 8 there is a through hole 16. In the semi-mold of the bottom 13, loose molding sand 19 is poured and, after facing, is sealed. uforma bottom 13 is evacuated through the vacuum actuator 6 and apertures 7 1erforirovapnye, vynolnen- nye two axially parallel legs of 8 and 9.

0

0

five

Q 5

0

The finished mold half of the bottom 13 is removed from the flask of the bottom 4 after disconnecting the evacuation of the flask of the bottom 4 and the base plate of the bottom 1.

Similarly, the mold half of the top 11 is manufactured, with the only difference being that the half-mold of the top contains a vacuum-wire 6 with two coaxially parallel branches 8 and 9, where branch 8 has a chamber Yu with a fixing sleeve 14 and a submodel top plate (not shown) and top of the box (not shown).

The assembly of the half-molds of the bottom 13 and the half-mold of the top 11 is carried out through punctures (not shown) of the sealing cover 17 in the half-mold of the bottom 13 and the half-mold of the top 11 in coaxially parallel branches x 8 and 9 and the fixing of the half-molds of the bottom 13 and top 11, a vacuum seal (FIG. 3) is formed, formed by means of a chamber 10 in coaxially parallel branches x 8 and 9, a fixing pin 15 with a through hole 16 and a through chamber 12.

The use of the invention provides an improvement in the quality of the castings and increases the percent yield of suitable cast.

Claims (1)

Invention Formula Equipment for the manufacture of bezopochny forms of vacuum-film molding, containing submodel plates of the top and bottom with a vacuum cavity and a model, flasks of the top and bottom with a cavity and a vacuum wire, characterized in that, in order to expand the technological capabilities and the quality of castings, vacuum - the wire is made in the form of two parallel branches, while the equipment is equipped with locking pins installed at the ends of the vacuum branches of the bottom flask, and at the ends of the vacuum wires of the flask of the upper chamber there are chambers that form receiving with the locking schtyr E gate valve. / 7 J ./ ten eight Tsig.Z.