SU1340889A1 - Arrangement for drying moulds and cores - Google Patents

Abstract

The invention relates to foundry, in particular, to devices for drying cores and molds. The purpose of the invention is to expand the technological capabilities of devices, improve working conditions and reduce energy costs. The device contains a liquid neutralizer 17 with a water bath 21, a duct 16 with a bracket 25 fixed to its wall, and a rotary gate 8. The duct 16 is installed with the possibility of vertical movement, and the cover 25 with the possibility of contact with the pipe 27 of the heat carrier discharge silt I (L SA :) 4 O 00 00 (G

Description

The invention relates to a foundry, in particular, to devices for drying casting molds and cores by blowing with hot gas (coolant) and is intended for use in automatic lines.

The purpose of the invention is to expand the technological capabilities of the device, improve working conditions and reduce energy costs.

The drawing shows a device for drying molds and rods, a slit.

Flask 1 with a molded rod or form 2 has vents 3 in its bottom, for mixing; roller tables 4 serve on the automatic line; Rollers 4 are placed above the upper frets 5 flasks 1 with a bell 6 with a socket 7 for heat carrier supply; 8, Under the fret of the bottom 9 of the flask 1, a casing 10 with upper edges 11 and lower edges 12 is placed. The casing 10 is supported by means of brackets 13 pivotally connected to hydraulic cylinders 14 mounted on supports 15. A duct 16 is attached to the lower edges 12 of the casing 10 for removal exhaust gas. The lower part of the nozzle 16 is located in the neutralizer 17, consisting of the housing 18, the bottom 19 and the caps 20. The lower part of the housing 18 and the bottom 19 forms a water bath 21 into which the neutralizer is poured.

In the bottom 19, there is a nozzle 22 for draining the spent neutralizer. The lower edges 23 of the duct 16 are sunk into a water bath 21, the walls of the nozzle 16 and the crinker 20 of the neutralizer 17 are connected by a flexible seal 24, an inclined cover 25 is attached to the wall of the duct 16 that crosses the inlet 26 of the nozzle 27 to release the cleaned gases Shiber 8 is connected with the movement of the casing 10 using the sensor 28 of the position of the casing 10 and the actuator 29 of the rotation of the gate 8,

The proposed device works as follows.

Flask 1 moves along the conveyor 4 of the automatic line and into the zone

devices for drying and stopping- gg level hp ..,

with a shut-off stop (in the drawing. Under the influence of vacuum, it is shown) under cap 6. Before the fed gases, through the flue 16 of the flask entrance 1, the gate 8 is closed, and the lower part, the indented bottom plate 14, and accordingly the neutralizing liquid. When the burned out 10 with the flue 16 is in the lower position. At the same time, the overhang 25 overlaps the inlet of the horn 26 of the nozzle 27 for draining the cleaned gases. Thus, during the idle period, the ventilation system for removal of the purified gases (not shown) does not suck the gases, and this saves energy costs for ventilation and cleaning. The liquid in the water bath 21 is at a certain initial static level hj. , When the flask 1 is installed in the working position, the hydraulic cylinders 14 are activated, and the casing 10 with the flue 16 is moved to the upper working position. At the same time, the upper edges 11 of the casing 10 are pressed against the fret.

Q flasks 1, together with the case 10, the upper fret 5, the flasks 1 is pressed against the lower edges of the cap 6. The upward movement of the case 10 is detected by the sensor

28points of the casing 10 and the 5th team uses the JNomoy mechanism

29 to open the gate 8, the gate 8 opens and the hot gases from the heat transfer system through the pipe 7 enter the internal space of the cap 6, where they are distributed over the entire surface of the raw rod or forms and infiltrate through the entire volume of the rod. Thus, the drying of the rods without deformation and warping is carried out. At the same time, due to the destruction of the resins included in the core mixture, resinous and gaseous harmful substances (mainly formaldehyde and phenol) are released. Exhaust gases with harmful impurities pass through vents 3 flasks 1 and enter the inside of the casing 10 , In the upper position of the casing 10 and the gas 5 of the inlet 16, the cover 25 opens the inlet section 26 of the nozzle 27 connected to the exhaust ventilation system (not shown),

Due to the vacuum created by the fan in the inner space of the body 18 of the neutralizer 17, the neutralizing liquid in the bath 2 is installed on some upper working dynamic

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The gases along the perimeter of the lower edges 23 of the duct 16 are in contact with the neutralizing liquid in the water bath, and a two-phase dynamic layer is formed; when passing through to the upper side, the exhaust gases are cleaned from phenol and formaldehyde by their adsorption

reagent solutions. At the same time, the capacity of the device, the improvement, also partly cools off the exhaust gases, as a result of which condensation and precipitation of resinous substances take place, which prevents the overgrowth of air ducts and parts of ventilation systems. Gases, free from impurities, are removed from the neutralizer 17 through the pipe 27.

The use of this device allows to improve the sanitary and hygienic working conditions, as well as to use it in automatic lines.

Editor M.Tovtin Order 4382/15

Compiled by E. Khludov Tehred I. Popovich

Corrector

Circulation 740 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, L (-35, Raushsk nab., d.4 / 5

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

3408894

Claims (1)

Isolation formula A device for drying casting molds and cores, comprising a cap with a heat carrier supply pipe, a casing installed under the cap, and a nozzle for draining heat carrier, in order to expand the process air 0 labor and energy savings, it is equipped with a liquid neutralizer in the form of a closed water bath with a gas outlet located under the casing, a rotary vane located in the heat transfer inlet pipe and attached to the housing a cap fixed to the heat inlet branch pipe. the casing is installed with the possibility of reciprocating vertical movement, and the end of the nozzle for draining heat carrier is buried in a water bath. Proofreader A.Zimokosov