SU569369A1 - Method of resin-coating of sand - Google Patents

Description

(54) METHOD OF CRYING SAND WITH RESINS

elements that are in a stirred mixture, or mechanical action, providing the proposed mixing mode parameters.

When mixed with electromagnetic elements, the latter move-pc and rotate under the action of a magnetic field. Destroying the macrovolumes of sand, the ferromagnetic elements bring the sand particles into translational and rotational motion at the required speeds.

The transit time of sand particles through the planes of ferromagnetic elements is 0.1-5.0 seconds. When feeding into the working zone of the Zhishko SMOLE, each sand particle, due to the force applied to it from the ferromagnetic elements, is wrapped around the resin; In this process, contact time plays an important role. As the contact time decreases, the sand particles are unevenly coated with resin, which reduces the effectiveness of the cladding. An increase in contact time leads to a decrease in cladding performance.

The clad sand from the chamber removes with its own weight, while the ferromagnetic particles

with electromagnetic field in the working area of the installation.

Table 1 shows the properties of the mixtures clad with a known mechanical method and the proposed method with the help of electromagnetic elements outside of the operating characteristics. At the same time, sand mixtures of a constant fi rdfion composition | (the size of the main fraction was 200 µm) of the following composition, wt.% Were taken:

Pesoy.94,0

Pupverbakelit PK-104

video 50% solution

in the ether-aldehyde fraction .6 .0

Data on the speed of translational and rotational movements: sand and contact time of blend blend ingredients (and on the effectiveness of cladding are given in Tables 2 and 3. |

The data were obtained on sand mixtures with a standing grain composition (main fraction 200 µm).

The mixture obtained by the proposed method is not caking and has enhanced mechanical properties.

Famous

60-70

22O mechanical

Provided by electromagnetic elements 70-90

Table 1

3

250

6OO

250

T a b l and yes 2

Gable a 3

edge samples weak, crumbling

Mix does not pass through the operating / zone, aavisanve

| Satisfaction gallant re plakvrovvve

Steady equilibrium, clear hem

Satisfactory Nlaqurovva

Poor olakvrovavne, flaking edges

0.05

0.1

3.0

1.0 of the invention about the size of the sand. The method of plating sand with resins by mixing with simultaneous translational and rotational movement of the components, characterized in that the | the intensification of the cladding and the increase in the mechanical strength of the mixture — the relative velocity of the notch movement is 0.1–10 m / s.

Continuation of table 3

20-24Discussion

plating, resin inclusions

37 45 The mixture is normal, ve

clear boundaries of the samples, the speed of rotational movement is 2.6-5.6 rev / sec, while mixing is carried out 0.1-5.0 sec. Sources of information taken into account in the examination: 1. Korotkov A, I, and Field. A.M. Molding into shell molds, M.j GNTIML, 1963. 2. USSR author's certificate Mi 192755, cl. On 01/13/08, 1965.