SE433582B

SE433582B - Method of cleaning castings or pressings, and tumbling machine to carry out the method

Info

Publication number: SE433582B
Application number: SE8100512A
Authority: SE
Inventors: G Bjorkman
Original assignee: Partille Mekaniska Fabriks Ab
Priority date: 1981-01-27
Filing date: 1981-01-27
Publication date: 1984-06-04
Also published as: SE8100512L

Abstract

A tumbling machine for cleaning materials comprises a drum 12 which can rotate about a horizontal axle 11, which is divided by a partition wall 21 into two chambers 22, 23. One end face of the drum is provided with a feed opening 16 and at the opposite end face there is a discharge opening 17. In the partition wall 21 there is a transfer opening 24. The walls in the second chamber 23 are partly bounded by open-work portions 27. At the partition wall 21 and the second end face there are oppositely placed transport screw elements 25, 26, which, when the drum is rotating in a certain direction, prevent the material from passing from one chamber to the other, or from the latter out from the drum, but when rotating in the opposite direction they accomplish said feeding operation. The material being processed is fed in at the opening 16 together with absorbing powder-like material, such as sawdust, and the drum is rotated for a certain time in one direction, where the transport screw 25 prevents transfer to the second chamber. After this, the direction of rotation is changed and the cleaned articles along with the material are transferred to the second chamber 23. Under continuing rotation in the new direction of rotation, the absorbing particles are separated through the open-work portions 27, and when the direction of rotation again changes back to the original one, the screw element 26 discharges the cleaned articles. During the time when the drum is made to rotate in the first direction of rotation for separation of the cleaning material, one can of course have a new batch fed into the first chamber for primary cleaning there. <IMAGE>

Description

3100512-6 2 kammaren, samt att man efter ytterligare tidsmoment under vilket den absorberande massan avlägsnas genom de genom- brutna väggarna åter ändrar rotationsriktning, varvid en- bart de rengjorda artiklarna matas ut vid trumlarens mot- satta gavel. 3100512-6 2 chamber, and that after further moments during which the absorbent mass is removed through the perforated walls, the direction of rotation is again changed, whereby only the cleaned articles are discharged at the opposite end of the drum.

En trumlingsmaskin enligt uppfinningen känne- tecknas därav att vartdera transportorganet omfattar en väsentligen 1800 omslutande skruvskärm, som från en punkt nära trummans innervägg sträcker sig in mot överförings- Kresp. utmatningsöppningen nära trummans centrum, varvid skruvskärmen vid mellanväggen och skruvskärmen vid änd- väggen vänder sina konkava partier i varandra motsatta riktningar, _ _ _ _ _ , _ _ ,_ ,__,._.__ _, ___", Uppfinningen kommer här nedan att beskrivas med hänvisning till bifogade ritningar, på vilka Fig. 1 visar en perspektivvy av en trumlingsmaskin enligt uppfinningen, Fig. 2 sohematiskt visar trumman med ytterväggen delvis avlägsnad, Fig. 3 visar en längdgenomskärning genom trumman, och Fig. Ä och 5 visar tvärgenomskärningar av trumman vid IV - IV resp. V - V i Fig. 3.A tumbling machine according to the invention is characterized in that each conveying means comprises a substantially 1800 enclosing screw screen, which from a point near the inner wall of the drum extends towards the transfer cresp. the discharge opening near the center of the drum, the screw shield at the partition wall and the screw shield at the end wall turning their concave portions in opposite directions, _ _ _ _ _, _ _, _, __, ._.__ _, ___ ", The invention comes below to be described with reference to the accompanying drawings, in which Fig. 1 shows a perspective view of a drum machine according to the invention, Fig. 2 sohematically shows the drum with the outer wall partially removed, Fig. 3 shows a longitudinal section through the drum, and Figs. Ä and 5 show cross-sections of the drum at IV - IV or V - V in Fig. 3.

Den i Fig. 1 visade trumlingsmaskinen består av ett stativ 10 som uppbär en väsentligen horisontell axel 11, vilken uppbär trumman 12. Denna är på i och för sig känt sätt innesluten i ett hus 13 försett med erfor- derliga inspektionsöppningar.The tumbling machine shown in Fig. 1 consists of a frame 10 which carries a substantially horizontal shaft 11, which supports the drum 12. This is in a manner known per se enclosed in a housing 13 provided with the necessary inspection openings.

Axeln drivs av en motor 1ü med växellåda 15 och det hela är så anordnat att rotationsriktningen kan ändras vid behov. Styrning sker med hjälp av en icke visad timer, som bestämmer behandlingsmomenten på det sätt som kommer att framgå av det följande.The shaft is driven by a motor 1ü with gearbox 15 and the whole is arranged so that the direction of rotation can be changed if necessary. Control takes place with the aid of a timer (not shown), which determines the treatment steps in the manner which will appear from the following.

Trummans gavlar är öppna på så sätt att det finns en inmatningsöppning 16 vid trummans ena ände, och en utmatningsöppning 17 vid den andra gaveln. En matnings- anordning 18 tillför det gods som skall behandlas, even- tuellt tillsammans med en absorberande pulverformig massa, t.ex. sågspån, till öppningen 16 i trummans ena gavel. En utmatningsanordning 19 är ansluten till den mot- s1åoo51r2~e satta gaveln, och genom denna kan de rengjorda artiklarna föras ut ur trumman och tas tillvara i en transportbe- hållare 20.The ends of the drum are open in such a way that there is an inlet opening 16 at one end of the drum, and an outlet opening 17 at the other end. A feeding device 18 supplies the goods to be treated, possibly together with an absorbent powdery mass, e.g. sawdust, to the opening 16 in one end of the drum. A discharge device 19 is connected to the opposite end set, and through this the cleaned articles can be taken out of the drum and taken up in a transport container 20.

Som bättre framgår av Fig. 2 har trumman 12 en symmetrisk, månghörnig tvärsektion, lämpligen sexsidig, och den är genom en mellanvägg 21 uppdelad i två kammare 22 resp. 23. I mellanväggen 21 finns en överföringsöpp- ning Zh. Såväl denna öppning, 24, som utmatningsöppningen 17 befinner sig i nära anslutning till rotationsaxeln.As can be better seen from Fig. 2, the drum 12 has a symmetrical, polygonal cross-section, preferably hexagonal, and it is divided by a partition wall 21 into two chambers 22 and 22, respectively. 23. In the partition wall 21 there is a transfer opening Zh. Both this opening, 24, and the discharge opening 17 are located in close proximity to the axis of rotation.

På den mot kammaren 22 vända ytan av mellan- väggen 21 finns ett skruvformat transportorgan 25, som omsluter något mer än 1800 och som från kammarens inner- vägg sträcker sig upp till och står i förbindelse med överföringsöppningen 24. En liknande transportskruv 26 finns på den andra kammarens 23 gavelvägg och sträcker sig även här från kammarens innervägg upp till och står i förbindelse med utmatningsöppningen 17. Som framgår av Fig. Ä och 5 är dessa skruvorgan orienterade i varandra motsatta riktningar.On the surface of the partition wall 21 facing the chamber 22 there is a helical transport member 25, which encloses slightly more than 1800 and which from the inner wall of the chamber extends up to and communicates with the transfer opening 24. A similar transport screw 26 is located on the the end wall of the second chamber 23 and also here extends from the inner wall of the chamber up to and communicates with the discharge opening 17. As can be seen from Figs. Ä and 5, these screw means are oriented in mutually opposite directions.

Delar av begränsningsväggarna för den andra kammaren 23 är försedda med genombrutna partier 27.Parts of the boundary walls of the second chamber 23 are provided with openings 27.

Maskinen fungerar på följande sätt. Det gods som skall rengöras blandat med absorberande massa, t.ex. sågspån, matas in i öppningen 16 vid den på ritningarna vänstra gaveln, och trumman får rotera i en viss rikt- ning under en tid som man erfarenhetsmässigt vet är till- räcklig för rengöring,resp. absorption av oljebeläggning- en. Under denna tid förhindras skruvorganet 25 att par- tiklar överförs till den andra kammaren.The machine works as follows. The goods to be cleaned mixed with absorbent mass, e.g. sawdust, is fed into the opening 16 at the left end of the drawings, and the drum is allowed to rotate in a certain direction for a time which it is known from experience is sufficient for cleaning, resp. absorption of the oil coating. During this time, the screw means 25 prevents particles from being transferred to the second chamber.

När rotationsriktningen på trumman ändras kom- mer organet 25 att fånga upp såväl godset som därifrån avskiljda partiklar av den absorberande massan, och för över dem till kammaren 23. Under fortsatt rotation i den nya rotationsriktningen kommer sågspån och slippartiklar att avskiljas genom de genombrutna väggpartierna 27 och samlas upp i härför lämpad behållare. När man endast har 8100512-6 rena artiklar i den andra kammaren ändras rotationsrikt- ningen återigen och då kommer skruvorganet 26 att trans- portera ut artiklarna genom öppningen 17 till en uppfång- 'ningsränna 19 för vidare behandling. Det är här viktigt att i varje fall utmatningsöppnigen 17 befinner sig så nära rotationsaxeln som möjligt, så att artiklarna inte kastas omkring när de matas ut utan lätt fångas upp i rännan 19.When the direction of rotation of the drum changes, the means 25 will catch both the goods and particles separated therefrom by the absorbent mass, and transfer them to the chamber 23. During continued rotation in the new direction of rotation, sawdust and abrasive particles will be separated through the pierced wall portions 27. and collected in suitable containers. When you only have 8100512-6 clean articles in the second chamber, the direction of rotation changes again and then the screw means 26 will transport the articles out through the opening 17 to a catching channel 19 for further processing. It is important here that in each case the discharge opening 17 is as close to the axis of rotation as possible, so that the articles are not thrown around when they are discharged but are easily caught in the chute 19.

Ovan beskrivna och på ritningarna visade ut- föringsform är endast ett exempel på uppfinningen, vars detaljer kan varieras på många sätt inom ramen för efter- följande patentkrav beroende på arten av de artiklar som skall behandlas, liksom art och mängd av föremål.The embodiment described above and shown in the drawings is only an example of the invention, the details of which can be varied in many ways within the scope of the appended claims depending on the nature of the articles to be treated, as well as the nature and quantity of objects.

Under utmatning av artiklar ur den andra kam- maren 23 roterar trumman i den först valda rotationsrikt- ningen. Man kan då ha matat.in en ny sats oljebemängda artiklar i den första kammaren 22, så att maskinen i stort sett arbetar kontinuerligt med gods i båda kamrarna.During discharge of articles from the second chamber 23, the drum rotates in the first selected direction of rotation. A new batch of oil-laden articles may then have been fed into the first chamber 22, so that the machine generally works continuously with goods in both chambers.

Claims

8100512-6 PATENT REQUIREMENTS

A method for cleaning cast or pressed goods articles in a tumbling machine comprising a drum rotatable about a substantially horizontal axis, which is divided by a partition wall (21) provided with a transfer opening (24) into two chambers (22, 23), of which the later chamber (23) later in the direction of movement of the articles is at least partially bounded by perforated walls parallel to the axis of rotation, characterized in that a transport means (25, 26) is arranged within each chamber (22, 23). comprising a substantially 1800 enclosing screw shield, which from a point near the inner wall of the drum extends towards a transfer resp. discharge opening (2H, 27) in adjacent intermediate resp. end wall and arrange these screw screens so that they turn their concave portions in opposite directions, that at one end of the drum articles are fed together with a powdered mass of such a nature that it, after treatment, can pass out through the perforated walls of the second chamber (23), that, after a first period of rotation with articles and pulp in the first chamber (22), the direction of rotation is changed, whereby articles and absorbent mass are transferred to the second chamber (23) , and that after additional moments of time during which the absorbent mass is removed through the perforated walls (27), the direction of rotation is again changed, whereby only the cleaned articles are discharged at the opposite end of the drum. IN

Drum machine for cleaning cast or pressed goods articles and comprising a drum (12) rotatable about a substantially horizontal axis (11) in both directions provided with an inlet opening (16) in one of its ends and with an outlet opening (17) in its opposite end, which drum (12) is divided by a partition wall (21) provided with a transfer opening (Bh) 8100512-6 k into two chambers (22, 23), of which the later chamber (23) later in the direction of movement of the articles is partly limited by with the axis of rotation substantially parallel walls (27), and which contain helical transport means (25, 26) for transmission resp. discharge from the chambers, characterized in that each transport means (25, 26) comprises a substantially 180 ° enclosing screw screen, which from a point near the inner wall of the drum extends towards the transfer resp. the discharge opening (ZÄ, 17) near the center of the drum, the screw shield (25) at the partition (21) and the screw shield (26) at the end wall turning their concave portions in opposite directions.