DD266465A3 - DEVICE FOR MIXING - Google Patents

Abstract

The invention relates to a device for mixing koernigen materials with clay or cement, in particular clay-bound molding sands. The invention is primarily applicable in the foundry industry. In a fixed mixing tub with centrally arranged mixing vats sweeping the entire tub floor and two tool groups dipping from above into the mixing tub, at least two further mixing kneading wings are arranged in a plane above the mixing vats over the tub floor. One of the two groups of tools projecting from above into the mixing tub is a kneading tool, the area of action of which partially penetrates that of the mixing kneading vanes. The other tool group is a loosening tool. The outer ends of the mixing kneading wings are contrary to their direction of rotation and formed fork-shaped. On the bottom of the vat overflowing mixing blades, wear plates are arranged, which are offset in groups from each other in their distance from the bottom of the tub. The mixing vanes and the tool groups can be driven in the same direction. Fig. 1

Description

For this 3 pages drawings

Application blot of the invention

The invention relates to olno apparatus iu tu η mishión of granular matorialion with clay odor zomont, insbosondoro tongobundeno formsando. It is primarily used in the Gioßoroiindustrio.

Characteristic of the known technical solutions From dor DE-OS 2603057 a mixing device is known, bol dor by zwoi synchron rotiorondo Mlschworkzcuggruppon and

el no above their Überdockungsboroich arranged and counter-rotating Mischworkzouggruppo cW molding material is prepared mixing and knotting. The disadvantage here is that the molding material is loosened in only goringom dimensions.

In DE-OS 2318692 eino device is described, boi dor the molding medium mittols on the tub Bodon fast circulating Mixed wings and fanned by in the tub immersion Schloudorworkzouge. Boi tongebundonon Formstoffon, however, is more active because dor fohlonden kneading, especially when using wonigor Binder and, consequently, a higher proportion of binders, so that the formation of agglomerated DIo is a consequence of this

unsatisfactory Oborflächenqualitöt dor Gußtoilo.

Object of the invention

It is therefore the invention of the invention, oinon molding material, which has a high degree of resolution, contributes to a high word quality of casting oil.

Presentation of the essence of the invention The invention has for its object to provide oine device, dio in the work stages mixing, knots and Loosening effectively united. According to the invention the object is achieved in that in oinom fixed mixing tub with by means of olner centric

arranged drive shaft driven, sweeping the entire Vessel Bottom Mischflügoln and two from above into the mixing tub dipping, drivable tool groups at least r.woi more mixed Knot-Flügol in a Ebeno even over the of the) tottichboden sweeping mixing blades and these are offset angoordnot.

According to a further feature of the invention oino of the two projecting from the top of the mixing tub tool group is a Kneading tool, desson area of action toilwoiso do; i the upper, centric in the mixing tub angoordnoten mixed-kneading-wing

penetrates. The outer ends of these mixing-Knet-Flügol are ontgogen their direction of rotation curved and bifurcated ausabgot.

On dor after unton in clon vat ragondon Knotworkzougo motive wool are radial and axial in mohreron Ebonon

arranged one above the other Knotflügol whose äußoro ends are curved against their Drohrichtung.

The andore from above into the mixing tub ragondo work group is oin loosening tool with mehreron radial and axial

on top of each other on oinor drive shaft angoordnoton wings.

The boidon from the top in Don Mlschbottlch protruding Werkzouggruppon and dio zontrisch In the Mischbottich angoordnotoii Mischflügol and Misch-Knot-Flügol are simultaneously antroibbar. On Don don Bottichbodon overcurrent brothels are in themselves bokannto ouswochsolbnro Schloißplatton ongoordnot, dio

According to another morkmal of the invention grupponwelso are placed in their distance to the tub-bodon zuoinandor, whereby the Schlüftplnttengruppon zwolor gogenüberstehonder Mischflügol radially from the inside to outside of gosohon gogonsinni j are vorgesetzt.

For the desired kneading effect of the centric upper mixing knot Flügol os is advantageous that their broadsides in their Show Drohrichtung, Due to the rotation of the mixing blades, the molding material component is mixed and the molding material is in the range dor

transported above mixing kneading wing and the Werkzouggruppon. Hler takes place through the sonkrecht to the direction of rotation

Broad sides of the oborne mixed-knot-wings, the partial penetration of the areas of action of the mixed-knot-wing and dor Knotflügel dos Knotwerkzeugs, by their curved training sowio their opposite movement in the Boreich Penetration oin complete digestion of the binder substances present in the molding material, even mindorwortiger Bindotono,

At the same time the molding material is gulockort by the top of Don Vat ragondo Auflockorungswerkzeug and well aerated.This gives the molding material eino good flowability and oino hohoVerdichtbarkeit.

Ausfilhrungsbolsplel Hereinafter, the invention is approximated by reference to an exemplary embodiment. In the zugohörigon drawing show:

Fig. 1: oinon cross section of the device according to the invention, Figure 2: a plan view of eifindungsgomäßon device, Figure 3: the section A-A of Figure 2 and Flg.4. the view B to Fin. 2 (detail).

In a fixed, standing on four feet 1 mixing tub 2 symmetrically zwol mixing blades 4 are arranged on a centrally arranged drive shaft 3, which are driven by an electric motor 6 via V-belt 6 and untergebcutem gear 7 and sweep the entire tub floor 8. On the Mischflügoln 4 are inclined against the direction of rotation and in height groupwise offset from each other arranged Schleißplatten 9 attached. Übor the two Hottichbodon 8 sweeping mixing blades 4 are two more, mixed with the Mischflügoln 4 by 90 ° angoordneto mixing Knot-Flügol 10 attached, dio are contrary to Dom rotation curved and have forked ends. In Don Mischbottich 2 tauchon a kneading work 11 and a Auffangerungswerkzoug 12 oin from above. The driven by an electric motor 13 kneading tool 11 includes a plurality of axially and radially disposed on a drive roller 14 kneading blades 16 and is positioned so that the knuckles 15 comb-like in dodge forked ends dor mixed knot Flügol 10 engage. The Knotflügol 16 and the mixing Knol Flügol 10 are designed so that their broad sides are perpendicular to the direction of rotation. The Auflockorungswerkzeup 12 Is with mohroren axially and radially arranged on an antriobiallo 16 Flügoln 17 provide and is driven by V-belt 18 by an electric motor 19.

The mixing device is fed via electromechanical scales 20. The mixing blades 4 mix and transport the filled-in formsto-component. By dio oblique arrangement dor wear plates 9 on don-blades 4, the molding material is lifted and the kneading tool 11 or dom loosening tool 12 is supplied. The Mlsch-Knet wings 10 at the same time cause a shear force between the upper and lower mold material area. By the same direction to Drohsinn dor wings 4.10 driven kneading tool 11, the binder contained in the molding material is completely digested and the quartz grains wrapped with a bandage, film optimal layer thickness. The comb-like meshing of the kneading tool 11 and the mixing Knrt-wing al 10 additionally intensifies the knotting process. From likewise driven in the same direction to the direction of rotation of the wings 4,1o / Vuflockerungswerkzeug 12 at the same time the Formetoff is constantly hurled to Bottichmitto and thereby loosened and released. After a period of about 120 seconds, the continuous molding material is discharged through the flap 21 from the mixing tub 2.

An advantage of this device is that the molding material such Aufberei et is that this orhölt a high degree of loosening and thus good fluidity and Vordichtbarkeitseigonschaften. Em weitoror distribution is that even with high Biderantoilen no agglomerates occur. The ability to simultaneously apply a very high speed of the high capacity assembly line also gives a high throughput performance. The device is further characterized by low Leistungsau'nahme and reduced wear.

Claims (3)

1. An apparatus for mixing granular materials with clays or cement, especially for mixing tongohundenor molding materials, with oinom fixed mixing tub driven by einor zontrically arranged drive wool, sweeping the bottom of the tub mixing blades with interchangeable Schlollßplatton and from above into the tub dipping, Antreibbc ι s Werkzeuggruppon , characterized in that in a plane above the bottom of the bucket (8) sweeping mixing blades (4) at least two woitore mixing knot wing (10) offset from the underlying Mischflügoln (4 ^ are arranged that one of the top of the mixing tub (2) projecting tool group is a kneading tool (11), that the areas of action of the mixing kneading blade (10) and the kneading tool (11) penetrate partially and the second Werk'euggruppoein loosening tool (12). 2. Apparatus according to claim 1, characterized in that in the same direction of rotation as the mixing kneading blades (10) driven Knotwerkzoug (11) on its in the mixing tub (2) projecting drive shaft (4) radially and axially in rnohreron levels one above the other Knudflügel (15) ajfwoist, which are curved counter to their direction of rotation, that the mixing Knot-Flügol (10) curved in gloichor manner and the endon are forked, and that the axes of rotation dos kneading tool (11) and the mixing knot wing (10) are arranged at a distance from each other so that the areas of action of the kneading blades (15) and the mixing kneading blades (10) partially penetrate each other. 3. Apparatus according to claim 1-2, characterized in that the down to? ¹ the Cottichboden (8) sweeping mixing blades (4) exchangeably arranged Schleißplaticn (9) facing mixing blades (4) in their distance to the tub Bodon (8) groups in opposite directions vorsotzt siro.