SU1320005A1 - Method of filling flasks with moulding sand - Google Patents

Abstract

The invention relates to foundry, in particular, to the dosing of molding materials. The aim of the invention is to improve the quality of the filling of the flasks with molding sand. This is achieved by using in the opening of a moving box of jumpers in the form of an equilateral triangle with a distance between them, defined by e1 1m according to the formula cf 10 + 1,785 W, where the distance between the jumpers, cm; W is the humidity of the molding mixture,%. Such jumpers provide the possibility of moving the box with a dose of molding sand and uniform filling of the flask with the mixture when the vibrator connected to the jumpers is turned on. 3 il. c & so go about

Description

11320005

The invention relates to foundry, in particular, to methods for filling the molding boxes with molding sand.

The purpose of the invention is to improve the quality of filling the molding boxes with molding mixture.

Figures 1 and 2 schematically depict a dispenser for the implementation of the proposed method; FIG. 3 is a flow chart of the method. 10

The dispenser contains a duct 1, jumpers 2, ti g 3, a vibrator 4 and is part of a molding press consisting of a maxillary hopper 5 with a jaw drive U, which communicates with the jumpers 2. As a result of oscillations of the straps 2 of the straps 2 - 2- and gets into the flask 9 on the model base 10, the molding mixture will be loosened by flashes 2, which ensures high quality due to the narrow pockets of the model axis 10, and since the movement of the molding mixture occurs perpendicular to the model This equipment is 10, this excludes the appearance of shadow zones in

form, for example, in the manufacture of a pipette 6, a cylinder 7 moving-f5 of an automatic casting line from the bottom of the filling frame 8, a flask of 9x 900x600 mm castings of agricultural and model equipment 10 ,.

The method is carried out as follows.

The molding mixture from the feed 20 of the hopper 5, after opening the jaw dispenser 6, fills the box J, Next, the cylinder 7 moves the box 1 from under the bunker 5 to the filling position and places the filling frame 25 and flask 9 over the opening, In the initial position and when the box is moved 1 vibration drive 4 is not included. Forming mixture when moving boxes

1. Above the opening of the filling frame 8 30 the marriage of the molds is reduced by 4%, and the flask 9 is held in the box 1 from

caterpillar tracks, molding mixture with W 5.5% is used, and the distance between the bridges should be C / 10 + 1.785 x. 5.5 10 + 9.82 20.0 cm. In the case of castings, the roller is a support roller, where W is 2.8%, 10 + 1.755 x 2.8 15 cm.

The use of the proposed method makes it possible to reduce the scrap in terms of fading and loosening during the molding of castings with complex configurations up to 20%. According to the pilot molding casting track

stationary jumpers 2 are ejected, Jumpers 2 are made with an equilateral triangle profile so that jumpers 2 can cut the molding mixture in a vertical and horizontal plane and simultaneously hold the molding mixture with side planes, creating a wedging effect, depending on humidity W of jumper mixture 2 have one relative to another at a given distance "Y, defined by the formula C / lO-t-1.785 W, so that the Ula Form of the invention

The method of filling the flask with a moldable mixture, which includes filling the dose of the molding mixture into a box-shaped metering device with jumpers in its lower part, moving the box to the position of filling the flask and filling the flask with mixture 40 with vibration applied, in order to improve the quality of filling the flasks molding sand, lintels used in the form of an equilateral triangle

would hold the molding mixture, if 45 and set them with a distance between them, are immobile, and skip the molding mixture while simultaneously loosening its structure, if they perform oscillatory movements. When box I arrives at the filling position (FIG. 3, dashed lines), the drive U is connected to jumpers 2. As a result of oscillations in the straps of the jumpers 2, the molding sand falls through the gaps between jumpers 2 and enters the flask 9 on the model equipment 10, At the same time, the molding mixture will be loosened by the flashlight 2, which ensures high quality of filling the narrow pockets of the model axis 10, and since the molding sand moves perpendicular to the model equipment 10, this excludes the appearance of shadow zones in

form, for example, in the manufacture of an automatic casting line with a shim of 900x600 mm.

caterpillar tracks, molding mixture with W 5.5% is used, and the distance between the bridges should be C / 10 + 1.785 x. 5.5 10 + 9.82 20.0 cm. In the case of castings, the roller is a support roller, where W is 2.8%, 10 + 1.755 x 2.8 15 cm.

The use of the proposed method makes it possible to reduce the scrap in terms of matting and loosening during the molding of castings that are complex in configuration to 20%. According to the pilot molding casting track

Ula Invention Form

The method of filling the flask with molding sand, including filling the dose of molding sand into a box-shaped dispenser with jumpers in its lower part, moving the box to the position of filling the flask and filling the flask with a mixture when applying vibration, in order to improve the quality of filling of the flasks with molding sand jumpers are used in an equilateral triangle shape

do them, defined by the formula

(/ 10 ± 1.785 W, where tf is the distance between the bars,

cm;

W is the humidity of the molding mixture,%,

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Editor E. Sligan

Compiled by S. Sukhomlinov

Tehred N.Gpuschenko Proofreader L. Besknd

Order 3484 Circulation 740 Subscription

VNIIPI USSR State Committee

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

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

Phie. 3

Claims (1)

Claim A method of filling the flasks with molding sand, including filling the dose of the molding mixture into a box-shaped dispenser with jumpers in its lower part, moving the box to the filling position of the flask and filling the flask with the mixture when vibration is applied, characterized in that, in order to improve the quality of filling the flasks with molding sand, the jumpers used in the form of an equilateral triangle and set them with the distance between them, determined by the formula </ = 10 + 1, 785 W, where tf is the distance between the jumpers, cm; W is the moisture content of the molding mixture,%. I32OOO5 fie. 1 Fig. 2 Fie. 3