FI61278C - APPARATUS FOER AVLAEGSNANDE FOERBRUKAD BEKLAEDNAD UR BEKLAEDDA METALLFORMAR - Google Patents

Description

fufirTI ΓβΊ m, HEARED $ | ULKA.SU, 107n

JgTft lBJ (11) UTLAGGNINGSSKRIFT 61 ^ / 0 C .... Patent ny'inner tty 12 07 1032 Patent oedJelaυ ^ ^ (51) K ».ik? / H« .a.3 B 22 D 29/00, 45 / 00 FINLAND —FINLAND (21) P «.0ttlh» k * im »* - PM« nUnrfknlne 773950 (22) HakwnltpUva —AnKMcnlffg ^ ag 28.12.77 (23) AlkupUvt — Giltlfhatadtf 28.12.77 (41) Translators | BllvK offwttllg 29.06.79

Patent and Registration Office .... .__. . ,, „.

_ * (44) Nth ti cast the date of entry and issue. - Pätene- och registrystyrelsen Anrtkan utltgd och utl.ikrlften publkarad 31.03.82 (32) (33) (31) fyriottr otuolkou * —Bogird prlorltot (71) Nauchno-Issledovatelsky Institut Spetsialnykh Sposobov Litya, ulitsa Khimich, ulitsa Khimich ) (72) Anatoly Davidovich Teplinsky, Odessa, Alexandr Filippovich Jurchenko,

Odessa, Grigory Abramovich Yarovinsky, Odessa, USSR (SU) (7 * +) Oy Kolster Ab (5k) automatic casting lines and directly applies to the device for removing the used liner from the lined metal molds.

It is known to successfully use lined metal molds to produce quality lights in virtually any form from different metals, e.g. cast iron containing flake and spherical graphite, carbon steel and steel alloys and other metals and their alloys, the geometrical dimensions of which vary from a few dozen mm to a meter or more and from a few hundred grams to 300 and more than a kilogram.

It is preferred to use lined metal molds for casting crankshafts for car and tractor (including diesel) engines and for camshafts for car engines, Rival frames for electric motors, roller bearing housings for railway wagons, hydraulic distribution boxes with cast 2 61278 wires and other front junction boxes for tractors.

Once the product has been removed from the mold, the used liner must be removed from the lined parts of the metal mold when casting with the lined metal molds. In this case, both the burnt and partially damaged liner that has been in contact with the molten metal and the non-combustible liner that has not been in contact with the molten metal must be removed.

The quality of the cleaning determines the quality of the new lining to be applied to the lined parts of the metal mold and thus the quality of the lights.

Previously, a device is known for removing a used liner from lined parts of a metal mold (see, e.g., RL Snezhnoi et al., , in "Liteinoye proizvodstvo" 1973 No 11.

Said device is mounted on a roller table conveyor, which moves the work surface upwards of the parts of the metal molds from which the used lining must be removed. The device includes a frame with a pivotally mounted crossbeam having a plate with a machining tool group that breaks the liner and a blow nozzle array connected to a system that supplies a machining agent, such as compressed air, to remove the burnt and detached liner.

The tools are equipped with sharp-edged rollers supported by spring-loaded, swinging levers. As the parts of the metal mold pass under the device, the rollers are forced against the surface of the metal mold to break (peel off) the liner in the plane of cracking. The device is able to remove the used lining metal from those parts of the mold which do not have protrusions above the level of crackability, which greatly limits its scope. The device is not able to clean those parts of the metal mold which have internal cavities whose lining never touches the molten metal, e.g. core cores and the like.

Thus, this device is completely impractical when using only one conveyor which conveys both the upper and lower parts of the metal mold, at least some of which have parts projecting above the level of fracture. Nor can such a device be used when two different metal molds are used on the same production line, which often occurs with modern casting lines using lined metal molds, whereby at least one part of the mold reaches above the cracking level.

It is therefore an object of the invention to provide an effective removal of a used liner from lined portions of metal molds of any shape. It is an object of the invention to provide a device which removes a used liner from lined metal molds and which certainly removes a used liner from those parts of the molds which have parts which extend above the level of fracture and which do not contact the molten metal.

This object is achieved by a device which removes the used liner from the lined metal molds and which includes a frame and a cross member carrying a horizontally rotatable plate with machining tools that knock out the used liner and nozzles connected to a system which feeds the spent liner to the nozzles. , which according to the invention is provided with a roller mounted on the frame in a horizontally rotating manner and having holes through which extend rods, each end of which carries a crossbeam and a plate with tools and nozzles and the other end carries an additional, similar crossbeam and a plate with its tools and nozzles, and wherein the system for feeding the working medium to the nozzles includes a valve attached to the frame, connected to the source of the working medium and regularly connecting it to the nozzles.

The device according to the invention for removing a used liner from lined metal molds ensures the removal of a used liner from parts of metal molds which move on a single conveyor and vary in shape, also from parts which extend above the fracture level or have lined cavities which do not touch molten metal.

The invention further improves the quality of the cleaning and thus the quality of the lights. The device according to the invention expands the possibilities of using automatic casting lines using lined metal molds.

It is advantageous to provide each cross member with a receiving branch pipe mounted thereon, which cooperates with the valve, and to make a line in each cross member which communicates with the branch pipe and to direct the workpiece towards a collector which distributes the material between the nozzles.

4,61278

It is desirable to connect at least a second crossbeam to the drive means which moves it back and forth relative to the roller to bring the tools and nozzles of the support plate against the surface of the metal mold to be cleaned. In addition, it is preferred to provide at least a second cross member with a drive means for moving it back and forth relative to the roll to guide the rotating plate with its tools and nozzle against the metal mold part to be cleaned. through the disc.

Such an arrangement of the rotating drive means of the discs makes the device much simpler, since both discs are driven by one drive means, so that the working stroke of one plate can be combined with the second idle stroke, which improves the overall efficiency of the device. In addition, the placement of the drive means inside the roll facilitates the feeding of the workpiece thereto.

It is desirable to provide the ends of the output shaft with cavities which communicate with both the line inside the cross member and the collector which distributes the workpiece between the nozzles. This makes it much simpler to feed the workpiece to the nozzles.

The invention will now be described in more detail by way of example with reference to the preferred embodiment and with reference to the accompanying drawings, in which Figure 1 shows a schematic overview of a device for removing a used liner from lined metal molds? Figure 2 is a side elevational view of the same subject? Fig. 3 shows a cross-sectional view along the plane III-IIIj of Fig. 1. Fig. 4 shows a cross-sectional view along the plane IV-IV- of Fig. 2. Fig. 5 shows a cross-sectional view along the plane V-V of Fig. 1; and Fig. 6 shows a cross-sectional view along the plane VI-VI of Fig. 1 of a part of the metal mold to be cleaned.

The device according to the invention, which removes the used lining from the lined metal molds, comprises a frame 1 (Figures 1, 2) on which are mounted bearings 2 and 3 belonging to a roller 4 which is rotated horizontally around them by a drive cylinder 6 via a drive cylinder 6. The drive 5 is connected to the roll 4 by a switch 7. The parts 8 and 9 of the metal mold are conveyed to the device by a conveyor, e.g. a machine-operated roller table 10 with a movable stop, a switch 12 and a limit switch 13.

Holes extend through the roll 4, as shown at 14 in Figure 3, in which guide sleeves 15 are placed, on which rods 16 are freely mounted, to the opposite ends of which the crossbeams 17 and 17 'are rigidly attached. The present invention in the embodiment, the crossbeams 17 and 17 'are attached to the rods by means of flanges 18 and half-rings 19.

The rods 16 together with the crossbeams 17 and 17 'are moved back and forth relative to the roll 4 by the drive 20. This is the case in question. in such an embodiment that its piston rods 21 (Fig. 3) of its drive cylinder are engaged with the crossbeam 17 and the shells 22 are fixed to the roller 4. The movement of the crossbeams along the line can be achieved by an alternative drive, such as a chain drive or a rack and pinion drive. grooved or attached directly to the rod 16. Thanks to the common operation of the movement along the line of the crossbeams 17 and 17 ', the device can be made much simpler and its reliability can be improved.

The crossbeams 17 and 17 'support the corresponding horizontally rotatable plates 23 and 23'. The plates 23 and 23 'are rotated by a suitable actuator 24, e.g. an electrically, hydraulically, compressed air or the like actuator. The drive 24 can be placed either inside the roll 4 or on the second cross beam 17,17 '. Ko. in an embodiment, the drive 24 is located inside the roller 4 and includes a gear 25 (Fig. 4) having internal keyways and rotatable in bearings 26e mounted on the roller 4. The same roller 4 includes a drive cylinder 27 whose toothed piston rod 28 cooperates with the gear 25 to provide rotational movement to the output shaft 29 having two ends 30 (Figures 5 and 6).

Each cross member 17 and 17 'has a through hole 31 having respective sleeves 32, each end of the shaft 29 extending through the respective cross members 17 and 17', respectively, and the sleeves 32 act as additional support members for the shaft 29 in rigid engagement with the plate 23 and 23. 'fixed to the end 30 of the shaft 29 by nuts 33 which tighten the plates 23, 23' against the respective crossbeams 17, 17 'by means of a spacer sleeve 34 and an axial bearing 35. The bearings 35 ensure the rotation of the shaft 29 when the axial forces have to be received from the plates 23, 23 'due to the shear resistance of the liner.

The shaft 29 is also provided with a keyway so that it can move along the line together with the crossbeams 17,17 'in the gear 25. Using a common drive to rotate the plates 23,23' makes the whole structure of the device considerably simpler.

The plates 23 and 23 'carry the respective machining tools 36 and 36', take the lining off, and the nozzles 37 and 37 ', which are connected to a system which feeds the machining agent, the function of which is to remove the burnt lining when it is chopped off. The nozzles 37,37 'are provided with adjustable tips 38 and connected by a common manifold 39 which divides the workpiece between the nozzles.

The tools 36,36 'are intended to cut off the liner which is away from contact with the molten metal. Their structure may vary, but in an embodiment, they are provided with a plurality of sharp-edged rollers mounted on spring-loaded, oscillating levers (see Liteinoye proizvodstvo, 1973 No. 11).

The tools 36,36 'for cutting off the used liner are arranged in several rows on the plates 23,23' so as to match the shape of the surface to be cleaned, which reduces the angle of rotation of the plates 23,23 '. The shape of the part of the metal mold to be cleaned also determines the arrangement of the nozzles 37 and 37 '.

The workpiece is fed to the collector 39 via a valve 40 located on the frame 1 and connected to a source of workpiece (not shown), e.g. The valve 40 (Fig. 5) comprises a housing 42 rigidly attached to the frame 1. The housing 42 has a resilient seat 43 and a movable sleeve 44 having through holes 45 extending therethrough. The sleeve 44 has a seal 46 at its end and is connected by a stem 47 of the valve 48. which cooperates with the seat 43. The action of the spring 49 and the machining agent forces the valve 48 permanently against the seat 43. Työstöaine fed to the arrow direction A valve 40 vastaanottolaipan 50 and through pipe 51 which is connected to a source of työstöaineen. The crossbeams 17, 17 'are provided with wires 52 which communicate with the branch pipes 41 and 41', respectively, and through holes 53 and hollows 54 made in the ends 30 of the shaft 29 with the collector 39. The ends 30 of the shaft 29 are closed by flexible rings 55 and covers 56.

The described system for feeding the working material to the nozzles does not use hoses, rotating main distribution pipes or other arrangements, so this makes the working material supply system much simpler. This also ensures very reliable operation of the machine, as the machining agent is fed into the nozzles only when the machine is in the working position.

To achieve normal hygienic conditions, the device is enclosed in a dust- and sound-insulated housing connected to a ventilation system (not shown).

Removing the used liner from the lined metal mold, po. the device works as follows.

The adjustable, movable stop 11 locks in the cleaning position a part of the metal mold transported by the machine-operated roller table 10 (Figs. 1,2). When the mold part 8 contacts the stop 11 and the limit switch 13, the switch 12 becomes closed, so that no other part 9 of the mold can be moved to the working position.

The cross beam 17 is lowered by means of force cylinders 10 mounted on the rods 16 until the machining tools 36 touch the surface of the cracking plane of the metal mold part 8 and the device reaches the position shown in Fig. 6. When the movement of the cross member 17 ends, the manifold presses the branch 40 against the end of the sleeve 44 to force the valve 48 out of the seat 43 so that machining agent can flow from the tube 51 to the manifold 41, then the line 52, the hole 53 and the cavity 54 at the shaft 29 end 30 , cover 56 and hence to collector 39 and nozzle 37.

The drive cylinder 27 of the drive 24 (Fig. 4) is energized simultaneously with the flow of workpiece so as to rotate horizontally at a certain angle the gear 25 and thus the shaft 29 and the plates 23,23 'together with the tools 36,36', the collector 39 and the nozzles 37,37 with. During this rotation, the ends 30 of the shaft 29 rotate in a sleeve 32 in holes 31 extending through the crossbeams 17, 17 '. As the plate 23 (Figs. 5, 6) rotates, the tools 36 break the liner. At the same time, the workpiece is blown through the nozzles 37 to the machining and splitting plane surfaces of the mold part 8 to remove the detached, burnt liner. The tools 36 and the nozzles 37 are arranged in a plurality of grooves which follow the shape of the mold and thus clean its entire surface.

Once the cleaning has taken place, the cross beam 17 (Figs. 1,2,5,6) together with the plate 23 rises back to its initial position and the branch pipe also rises at the same time, whereby the sleeve 44 of the valve 40 follows with it by the action of the spring 49. Thus, the moment the branch tube 41 is forced out of the sleeve 44, the valve 48 is pushed against the seat 43, whereby the flow of machining agent in the branch tube 41 and thus towards the nozzle ceases.

When the cross beam 17 with its plates 23 is in the upper position, the mold part 8 has sufficient clearance, even if it has protruding parts, so that it can pass under the tools 36 and the nozzles 37. When the crossbar 17 has risen, and the crossbar 17 'with it, the stop 11 and the switch 12 open, and the mold part 8 moves out of the device and in its cleaning position (with the stop 11) takes the mold part 9, and then the switch 12 closes preventing other parts of the mold from entering. tel-distusasentoon. At the same time, the drive 5 rotates the roller 4 in the bearings 2 and 3 by 180 ° and the cross beam 17 'with its plates 23', tools 36 'and nozzle 37' moves to the machining position to clean the mold part 9. Since the plates 23,23 'turn in different directions, neither the cylinder 27 nor the plates 23 and 23' have an idle movement. The plates return to their starting position, the opposite plate turns to the machining position.

In order to reduce the stroke of the cylinder 20 controlling the movement of the crossbeams 17,17 'along the line and thus to reduce the overall dimensions of the device, the crossbeams 17,17' with their plates 23,23 'can be moved to and from the machining position by rotating the roller 4 in stages. When the cross beam 17 and the plate 23 have been raised, the roll 4 is first turned 90 ° to the position shown in Fig. 2 by broken lines (the bars 16 are horizontal).

When the roll 4 is in said position, the crossbeams 17 and 17 'move to the left to the position shown in broken lines in Fig. 2, and then the roll 4 is rotated the remaining 90 °, the device appearing in Figures 1 and 2 with the only difference being that the crossbeam 17 is at the top and the cross beam 17 'is at the bottom (in the machining position), and the device is ready to clean the metal mold part 9.

Removing the used liner from lined metal molds, po. the device thus makes it possible to clean two different parts of metal molds efficiently, which parts have a complex shape and 9 61278 and which may also have parts extending above the level of fracture.

Po. the device expands the possibilities of using foundries using lined metal molds, improves their versatility and efficiency, and improves the lining of metal molds and thus the quality of the lights.

Claims (5)

An apparatus for removing spent clothing from coated metal molds comprising a frame (1) and a cross bar (17) carrying a horizontally rotatable plate (23) with machining tool (36) for loosening of used clothing and coupled to nozzles (37). a system for supplying a workpiece to them by means of which spent clothing is removed, characterized in that the apparatus comprises a roller (4) mounted on the frame (1) and rotatable about a horizontal shaft and provided with continuous heels (14). ) which holds freely passing rods (16) »one end of which supports the cross member (17) and the plate (23) with the tools (36) and the nozzles (37) and the other end of which carries a similarly mounted cross member (17 ') and a similar plate (23 ') which also has machining tools (36) and nozzles (37), and that a system for supplying machining material to the nozzles (37,37') comprises a valve (40) mounted on the frame (1) and coupled to a cold for processing agent and period iced feed processing agent for the nozzles (37.37 *). 2. Apparatus according to claim 1, characterized in that each cross member (17,17 ') is provided with a mounted mounting receiving manifold (41,41') which cooperates with the valve (40) and each cross member is provided with a line (52). ) which stays in communication with the manifold (41,41 ') and directs the machining member to a collector (39) which distributes it between the nozzles (37,37'). Apparatus according to claim 1, characterized in that at least one transverse beam (17,17 ') is coupled to a gear (20) which moves it forward and eats relative to the roller (4) to move the rotatable plates (23, 23 ') with the tools (36,36') and the nozzles (37,37 ') against the surface of the metal mold to be cleaned. 4. Apparatus according to claims 1 and 2, characterized in that both the plates (23, 23 ') are coupled to the gear (24), which move them forward and eat and are mounted in the roll (4) and provided with an output shaft (29). ) with two ends (30), each of which in turn passes first through the corresponding cross beam (17,17 ') and then receives the corresponding plate (23,23').