EP1419024A2 - Verfahren und vorrichtung zum entkernen wasserlöslicher giesskerne - Google Patents
Verfahren und vorrichtung zum entkernen wasserlöslicher giesskerneInfo
- Publication number
- EP1419024A2 EP1419024A2 EP02776941A EP02776941A EP1419024A2 EP 1419024 A2 EP1419024 A2 EP 1419024A2 EP 02776941 A EP02776941 A EP 02776941A EP 02776941 A EP02776941 A EP 02776941A EP 1419024 A2 EP1419024 A2 EP 1419024A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- sand
- water
- coring
- casting
- castings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000005266 casting Methods 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims abstract description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 134
- 239000004576 sand Substances 0.000 claims abstract description 112
- 238000005406 washing Methods 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims description 23
- 238000001704 evaporation Methods 0.000 claims description 19
- 230000008020 evaporation Effects 0.000 claims description 19
- 239000002351 wastewater Substances 0.000 claims description 19
- 238000004140 cleaning Methods 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 12
- 230000000712 assembly Effects 0.000 claims description 10
- 238000000429 assembly Methods 0.000 claims description 10
- 239000010802 sludge Substances 0.000 claims description 10
- 239000013505 freshwater Substances 0.000 claims description 8
- 239000003110 molding sand Substances 0.000 claims description 7
- 239000012141 concentrate Substances 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000009833 condensation Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims description 2
- 239000000498 cooling water Substances 0.000 claims description 2
- 239000004094 surface-active agent Substances 0.000 claims description 2
- 241000273930 Brevoortia tyrannus Species 0.000 claims 1
- 206010016256 fatigue Diseases 0.000 claims 1
- 210000003903 pelvic floor Anatomy 0.000 claims 1
- 230000008016 vaporization Effects 0.000 abstract 1
- 238000009834 vaporization Methods 0.000 abstract 1
- 239000011162 core material Substances 0.000 description 26
- 239000000243 solution Substances 0.000 description 18
- 239000011230 binding agent Substances 0.000 description 10
- 238000011161 development Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 7
- 238000007654 immersion Methods 0.000 description 7
- 239000002904 solvent Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 235000021317 phosphate Nutrition 0.000 description 2
- 125000002467 phosphate group Chemical class [H]OP(=O)(O[H])O[*] 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000012266 salt solution Substances 0.000 description 2
- 238000007528 sand casting Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229920000388 Polyphosphate Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000001205 polyphosphate Substances 0.000 description 1
- 235000011176 polyphosphates Nutrition 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000003232 water-soluble binding agent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
- B22D29/001—Removing cores
- B22D29/006—Removing cores by abrasive, water or air blasting
Definitions
- the invention relates to a method and a device for coring water-soluble casting cores made of sand.
- the cores are removed from the finished casting in conventional pressure-free aluminum casting processes such as cold box, arm box, croning and the like by cracking and subsequent shaking using vibration tables, tapping, blowing and other mechanical processes.
- the castings are then sandblasted, the blasting material consists of iron balls or quartz globulite in order to remove the remaining adherent core material.
- the binder systems used for mold and core production are mainly based on synthetic resins as binders for the sand used.
- the majority of the organic binder components are harmful to health, which is why precautions are taken at the workplace to extract the chemicals (e.g. solvents or amines used as catalysts) must be taken. Washing solutions that occur when cleaning the exhaust air must be disposed of.
- the old sand accumulating in large quantities during the coring either has to be disposed of at great expense or is regenerated by pyrolysis, which also results in exhaust air which is harmful to health, and the washing solution which is obtained must therefore also be disposed of at a high cost.
- the invention is therefore based on the object of providing a method for coring water-soluble casting cores and, moreover, of providing a device by means of which this method can be carried out.
- the object is achieved by a generic method in which the core sand is expelled from the castings by water jets.
- the sand is expelled from the castings in a coring basin.
- the castings having at least one casting core are introduced in advance into a water-filled solution tank to dissolve the casting core. After a further development of the process, the castings are moved by moving them in a water filled the sand removal basin.
- the invention further provides a generic device, which is characterized by a water jet device for driving out the core sand from the castings.
- the device according to the invention also has a coring basin for receiving the castings when the molding sand is driven out.
- the device according to the invention preferably additionally has a water-filled solution tank for dissolving the molding sand in the castings.
- the device also contains a water-filled sand removal basin for rinsing out the molding sand from the castings.
- the casting is immersed in a water-filled solution tank beforehand in order to dissolve the casting core.
- the loosened core is then expelled from the casting in a coring basin using water jets.
- the residual sand remaining in parts of the casting mold that are difficult to access is then removed by moving the casting in a water-filled residual sanding basin.
- the individual system parts which are required for the gradual coring of the cast part are connected to a transport system which has at least one conveyor belt in order to avoid unnecessary rearrangements of the cast parts.
- the transport system provided for this purpose can consist of several individual conveyor belts. stand or be formed in a particularly advantageous embodiment as a single conveyor belt.
- the casting is placed on a conveyor belt after casting, the conveyor belt conveys the casting into the solution tank, it passes through the solution tank on the conveyor belt, is lifted above the water level again, and transported to the coring station with water jet nozzles and after gutting to the immersion bath for the remaining sand removal.
- the method provides that the transport belt or portions thereof are stopped at the respective processing stations or controlled in the transport speed to adapt to the respective requirements so as the residence time of the castings at the individual processing stations NEN ⁇ Kgs.
- an extremely preferred embodiment provides that the untreated cast parts are placed on the conveyor belt by a manipulator.
- the manipulator can e.g. act as a sensor-controlled gripper arm.
- the casting core is dissolved in the water bath by absorbing water. Due to the water solubility of the binder, this dissolving can be achieved with pure water alone. It is conceivable but also to accelerate the dissolving by adding a surfactant to reduce Oberflä ⁇ chenencies and / or by addition of a deaerator that supports the expulsion of the remaining air in the mold core. Additionally or alternatively, acid can also be added.
- the coring of the castings is carried out in individual processing, ie each casting is machined to exclude sand from a mold in an adjacent one. Due to the water solubility of the binder, the coring is carried out by water jets aimed specifically at the casting. The water outlet nozzles can be manipulated in all directions and the movement of the water can be adjusted in a program-controlled manner to the respective casting, whereby the coring of complicated castings can be ensured, since the water jets also reach inaccessible corners inside the casting.
- movements of the water jet nozzles can be at least partially individually adapted to the castings under program control. This is particularly advantageous for small, hard-to-reach corners of the casting.
- a further development provides that several water jet nozzles are combined into group-controlled nozzle arrangements (nozzle sticks), so that even larger areas can be cored efficiently.
- the casting is arranged in a rotating cage.
- the rotary cage has a number of rollers that are in the Unroll the essential circular tracks of the coring device.
- a preferred embodiment provides water jet nozzles of different geometries or corresponding nozzle assemblies, it being possible for the water jet nozzles to be designed as flat jet nozzles, full jet nozzles and / or full cone nozzles.
- the individual nozzle assemblies can be switched one after the other and can be active with a time delay.
- a large-area gutting e.g. by means of flat jet nozzles, whereupon a downstream nozzle assembly which is designed specifically for the respective casting (full jet, full cone jet), the
- the jet pressure can be adjusted accordingly.
- the method further provides that the casting after the water jet coring by a manipulator from
- Conveyor belt is taken and transferred to an immersion bath for residual sanding.
- the gripping arm can in turn be a sensor-controlled gripping arm on the part of the device.
- the old sand which is still contaminated with residues of the binder, collects on the bottom of the solution tank, the de-coring tank as well as the immersion bath for residual core removal.
- This old sand can advantageously be cleared out of the various basins using a so-called sludge clearing device, as is known from sewage sludge technology.
- the function of the sludge clearing device is also taken over by the conveyor belt or individual conveyor belts.
- the corresponding conveyor belt has drivers on its surface.
- the castings are then conveyed on the upper side of the conveyor belt (holding function of the carriers), on the underside, which is guided along the respective pool floor, the sand is conveyed by the carriers for discharge over the water surface.
- Another embodiment alternatively allows sand discharge by spiral conveyors, suction scrapers, blade scrapers or the like.
- a particularly preferred type of implementation provides for the used sand to be fed to a sand washing device.
- the sand washing device can be designed as a basin with a fine-mesh, sand-impermeable intermediate floor, into which the old sand is introduced above the intermediate floor.
- the sand washing device is filled with water.
- the cleaning can be supported by blowing in compressed air below the intermediate floor - possibly in intervals - in order to achieve an efficient swirling of the sand.
- the process also provides for the washed one
- the waste water from the solution tank, the coring station, the immersion bath and the sand cleaning tank contains phosphates from the dissolved binder.
- This phosphate-containing wastewater does not have to be disposed of expensively, but can be used again as a raw material in the chemical industry or fertilizer industry.
- the waste water from the coring system is fed to an evaporation device, which converts the waste water into a concentrate. A significantly lower volume is thus achieved.
- the resulting distillate can be fed back directly to the coring device.
- a vapor compressor for example in the form of a bubble evaporator, a downflow evaporator or a forced circulation evaporator, or a low-temperature evaporator can be used for the evaporation.
- At least splash water which arises at the coring device or water vapor which arises during the casting of hot castings is collected in a housing or is recovered by condensation.
- the resulting water vapor is advantageously cooled by means of the distillate from the evaporation device, which is guided in cooling water hoses in the walls of the housing.
- the distillate or the fresh or process water (aqueous salt solution) used is heated before being used again in the context of water jet technology, which leads to an accelerated dissolving of the binder bridges during coring, so that the entire process can be carried out more quickly ,
- the invention has an optical recognition system for recognizing the cast part geometry.
- detection can take place, for example, on the basis of shadowing of the casting when using suitable light sources, image recording devices (video, CCD) and image evaluation devices (microprocessor) and subsequently influence the gutting process in terms of control technology.
- Figure 1 is a block diagram of a pilot plant as a device for performing the method according to the invention.
- FIG. 2 shows a section through an embodiment of the device, which illustrates the transport route of the castings and the sequence of the individual work steps and the sand discharge;
- FIG. 2b shows a top view and a sectional view of a first embodiment of the water jet coring device
- FIG. 3 shows a top view and a sectional view of a further embodiment of the water jet coring device
- FIG. 4 shows a top view and a sectional view of a further embodiment of the water jet coring device
- Fig. 5 is a plan view of a water jet according to the invention ⁇ coring device with a manipu- lator to Guß inconveniencetkernung;
- Fig. 6 is a sectional view of an embodiment of the water jet coring device with housing for heat and steam recovery; 7 shows a schematic illustration of the washing device for cleaning the old sand;
- Fig. 9 is a schematic representation of the drying device.
- FIGS. 2 to 5 shows in the form of a block diagram a specific exemplary embodiment of a device for coring castings and in particular for carrying out the method according to the invention.
- the actual coring of the castings takes place in a coring device 1, which also includes a sludge clearing device 1.1, 1.2.
- the coring device 1 is then shown in detail in FIGS. 2 to 5.
- Lattice boxes 2.1, 2.2 are arranged in the immediate vicinity of a coring device 1 and are used to hold untreated 2.1 and treated cast parts 2.2. Furthermore, the device has a sand collecting container 3, which is likewise arranged in the vicinity of the coring device 1 and is located between this and a sand cleaning device 4.
- the sand cleaning device 4 and the coring device 1 are connected to a distillate container 5 via lines. Further lines lead from the coring device 1 and the sand cleaning device 4 to a storage tank 6 for a downstream evaporation device 7 and from there to a concentrate container 8.
- the evaporation device 7 is also connected to the distillate container 5.
- the device Downstream of the sand cleaning device 4, the device has a sand bunker 9 and a drying device 10 for washed sand. This is followed by a core making shop 11.
- the process is carried out as follows: Untreated cast parts are stored in the mesh box 2.1 and are fed to the coring device 1 by means of a manipulator 1.3, for example in the form of a gripping arm. After gutting, a second manipulator 1.4 places the treated castings in the other lattice box 2.2.
- Used sand 12 and the polluted water 13 which are obtained during the coring are separately reprocessed.
- the used sand 12 is transferred into the sand collecting container 3 by means of the sludge clearing device 1.1, 1.2 contained in the coring device 1 and from there reaches the sand cleaning device 4, which is shown in more detail in FIG. 7.
- the cleaned sand is fed to the drying device 10 via the sand bunker 9. This can e.g. done by means of a screw conveyor.
- the cleaned, dried and thus regenerated sand 14 is then available again in the core making shop 11.
- the drying device 10 is shown in more detail in FIG. 9.
- the wastewater 13 is fed to the evaporation unit 7 via the storage tank 6.
- the latter is explained in more detail in FIG. 8.
- the wastewater 13 is reduced to a concentrate 15, which is stored in the separate container 8 and can be used as a secondary raw material for the chemical industry.
- the distillate 16 arrives in the container 5 provided for this purpose and is thus again available for the coring device 1 (especially for water baths 1.5, 1.6 and a water jet device 1.7) and for the sand washing device 4.
- 2 shows the schematic structure of an embodiment of the coring device 1. It has three essential sub-devices, namely a water-filled solution tank 1.5, a water-filled residual sanding tank 1.6 and a coring tank 1.8, which are arranged in a row next to one another.
- the solution tank 1.5 and the coring tank 1.8 are connected to a transport system for castings 1.9 to be cored, which in the embodiment shown consists of a sand-permeable conveyor belt 1.10 with drivers 1.11 for sand discharge on its surface.
- the conveyor belt 1.10 starts on the side of the solution basin 1.5 facing away from the coring basin 1.8 above the water surface, leads over the bottom of the solution basin 1.5 and the coring basin 1.8 and back from there.
- the drivers 1.11 of the conveyor belt 1.10 also take on the function of a holding device for the castings 1.9 during transport to the coring station.
- the residual sanding basin 1.6 has its own sand-permeable conveyor belt 1.12, which is also permeable to the driver and which also begins above the water surface, is guided over the pool floor and returns from there to the starting point.
- the coring device 1 shown further includes two manipulators 1.3, 1.4 in the form of gripping arms, which are arranged such that a first manipulator 1.3 is located at the beginning of the solution tank 1.5, so that it reaches the part of the conveyor belt 1.10 that runs above the water surface.
- a second manipulator 1.4 is located at the end of the sand removal tank 1.6, so that it reaches both the sand removal tank 1.6 itself and the end of the first conveyor belt 1.10 in the tank 1.8.
- the coring basin 1.8 has movable and program-controllable water jet nozzles 1.13, which in the embodiment shown example in the form of nozzle sticks 1.14 are arranged in groups.
- the first manipulator 1.3 which is shown schematically here as a sensor-controlled gripping arm, places the cast parts 1.9 on the first conveyor belt 1.10, on which they are introduced into the water-filled solution tank 1.5 (solvent temperature from room temperature to approx. 80 ° C.). After sufficient dissolving time, which can be controlled by slowing down or accelerating the conveyor belt 1.10, the castings 1.9 enter the coring tank 1.8, in which they are cored by means of the movable and program-controlled water jet nozzles 1.13 above the water level at jet pressures of 2-6 bar.
- the second manipulator 1.4 shown here in the form of a second gripper arm, lifts the castings 1.9 from the conveyor belt 1.10 and immerses them for residual sanding by moving them in a water-filled residual sanding basin 1.6. After the remaining sand has been removed, the castings 1.9 are removed from the residual sanding basin 1.6 by the manipulator 1.4 and deposited for further processing.
- the discharge 12 of the sand accumulating on the bottoms of pools 1.5, 1.6, 1.8 is accomplished by the mud clearing function of the conveyor belts 1.10, 1.12.
- the conveyor belts with their surfaces covered with drivers 1.11 are guided over the pool floors in such a way that the old sand 12 is lifted over the pool edge and is discharged in this way.
- FIG. 2b shows a top view and a sectional view of further details of the water jet device in the coring basin 1.8.
- For gutting the castings 1.9 are laterally movable water jet nozzles 1.13 are also arranged.
- the speed of the conveyor belt 1.10, which is occupied by drivers 1.11, can be controlled in such a way that an optimal coring is achieved. The speed is to be determined empirically.
- the coring basin 1.8 has a clamping device 1.15 as a holding device for the castings 1.9 during the coring phase, which is fixed to the outer wall of the basin 1.15a and contains one or more clamping cheeks 1.15b.
- FIG. 3 and 4 each show a top view (left) and a sectional view (right) of further embodiments of the water jet coring device according to the invention.
- the nozzle assemblies 1.14 are linear arrangements of a plurality of water jet nozzles 1.13, which are arranged laterally and above the cast parts 1.9 arranged on the conveyor belt 1.10 on a nozzle jet frame 1.16.
- the nozzle jet frame 1.16 essentially has a U-shaped shape closed above the casting 1.9 and comprises connecting lines 1.17 for fresh water or process water (distillate 16 or aqueous salt solution with a concentration of up to 13%, preferably up to 8.5%, pH) 7-12), which is used to core the castings 1.9.
- the arrangement of three nozzle assemblies 1.14 on each nozzle jet frame 1.16 is referred to as the nozzle jet set 1.18, 1.18 '.
- the front nozzle jet set 1.18 in the direction of the conveyor belt movement has flat jet nozzles which form a first (large-area active) cleaning or coring stage.
- the jet stream set 1.18 'downstream in the direction of the conveyor belt movement forms a second cleaning or coring stage and, for this purpose, has, for example, full jet and full cone nozzles with which a targeted small-scale coring of the cast parts 1.9 is possible.
- the nozzle material is selected for its durability and chemical resistance. For example, nozzles made of polymer, brass or stainless steel are possible.
- FIG. 4 shows, in a representation corresponding to FIG. 3, a further embodiment in which the nozzle stock 1.14 with the water jet nozzles 1.13 are arranged on mobile nozzle jet frames 1.18, 1.18 '.
- the latter have wheels 1.20 in the lower region, ie at the ends 1.19 of their free legs, on which they can be displaced along the conveyor belt 1.10 with the cast parts 1.9 in the direction of the double arrows P 1 at an empirically determined speed.
- a multistage gutting process for the cast parts 1.9 can be implemented analogously to the explanations relating to FIG. 3.
- the cast parts 1.9 and / or the nozzle blocks 1.18, 1.18' can also be movable in the vertical direction (perpendicular to the plane of the conveyor belt 1.10).
- a separate lifting device (not shown) is provided for this.
- 4a and 4b show a development of the coring device according to the invention, which is designed for rotating the castings.
- the coring device 1 has, in addition to the configurations of FIGS. 3 and 4, a rotating cage 1.15c which is essentially cuboid (FIG. 4b) and which is arranged inside the nozzle jet frame 1.16 by means of rollers 1.15d arranged at its corners in a manner parallel to one another circular tracks 1.15e, of which only one can be seen in FIGS. 4a, b, is rotatably guided.
- the rotation cage 1.15c can be rotated about an axis A parallel to the plane of the conveyor belt 1.10, which is shown in FIG. 4b (there perpendicular to the sheet plane).
- the cast part 1.0 to be removed is transported by means of the conveyor belt 1.10 in the direction of arrow P to the rotation cage 1.15c.
- the rotation cage 1.15c With the help of, for example, light barriers (not shown), an exact positioning of the cast part 1.9 below the rotation cage 1.15c is determined.
- the cast part 1.9 is lifted into the rotating cage 1.15c by means of a lifting device, not shown, and fixed there by means of the clamping device 1.15.
- the rotation is implemented with parallel running rails 1.15e (two in the exemplary embodiment shown) and the rotating cage 1.15c located therein, which is connected to the running rails 1.15e via four rotatably mounted rollers 1.15d.
- nozzle geometries used correspond to the core removal principles already presented above.
- FIG. 5 shows a further principle of use of the water jet technology for coring castings using a manipulator.
- another manipulator 1.21 is arranged in the area of the conveyor belt 1.10, which carries a nozzle jet head 1.23 at the distal end 1.22 of its arm, which in the exemplary embodiment shown has water jet nozzles 1.13 of different shapes, for example flat jet, full jet and full cone nozzles.
- a stand device 1.24 for receiving the castings 1.9 is arranged on the conveyor belt 1.10 moved in the direction of the arrow P.
- the shape of a plate 1.25 lying flat on the conveyor belt 1.10, which has a number of vertical supports 1.26 on its top, on which the cast parts 1.9 lie at a distance from the plate 1.25, so that they are accessible from all sides and thus can be removed from all sides is possible.
- the coring of the cast parts 1.9 which are arranged on the conveyor belt 1.10 (the stand device 1.24) and move past the manipulator 1.21 in the direction of the arrow P, is carried out by point-controlled program-controlled movement of the cast parts 1.9 by the manipulator 1.21, the different water jet nozzles being used as required 1.13 are used on the manipulator's nozzle jet head.
- the various movement possibilities of the manipulator 1.21 in all spatial directions are shown by the arrows in the upper part of FIG. 5.
- the invention proposes, in the context of a preferred further development, a system for water and heat recovery in a water jet core removal system. This is shown in FIG. 6.
- FIG. 6 shows a sectional view through an embodiment of the device with a mobile nozzle jet frame 1.18, which essentially corresponds to the sectional view of FIG. 4.
- a casing 1.27 with a U-shaped cross section is provided around the coring device, which completely surrounds the coring device and at least for the most part is made of a good heat-conducting material, for example a metal.
- Water hoses 1.28 are arranged inside the wall of the housing 1.27. These have a helical or meandering course and extend thus essentially into or out of the drawing plane.
- the distillate 16 of the evaporation device 7 fresh water or a solution of water and salt (process water) is fed into the lines 1.28 by means of a feed line 1.29 and an outlet 1.30.
- water vapor 13.2 forms within the housing 1.27, which condenses on the housing due to the temperature difference to the walls of the housing 1.27, which drastically reduces water loss during coring.
- the condensate can then be fed to the coring basin 1.8 and further processed as described above.
- the heated distillate 16 leaves the housing through the outlet 1.30 and is then used itself for the coring of castings 1.9, the binder bridges being dissolved more quickly due to the increased water temperature, so that the coring can be carried out more quickly.
- the housing 1.27 with the water-carrying hoses 1.28 accordingly works according to the principle of a heat exchanger, through which part of the heat energy used in the casting process is recovered and used for accelerated coring of the castings.
- FIG. 7 shows the sand washing device 4, with the aid of which the sand 12 obtained during the coring is cleaned of binder residues.
- it includes a basin 4.1 which, at approximately 2/3 of its depth, has a fine-mesh, sand-impermeable intermediate plate arranged parallel to the basin floor 4.2. which has 4.3. Beneath the intermediate floor 4.3 there extends a compressed air line 4.4 running parallel to the pool floor 4.2 and measuring the largest part of the pool extension, which has openings 4.5 directed at regular intervals upwards, ie in the direction of the intermediate floor 4.3.
- the pool 4.1 also has a feed line for fresh water 4.7 near the upper pool edge 4.6 and a drain 4.8 for dirty water 13 on the pool floor 4.2.
- the used sand 12 is introduced into the washing device 4 above the fine-meshed and sand-impermeable intermediate floor 4.3, which is filled with fresh water.
- the swirling of the sand 12 is carried out by compressed air, which is blown in below the intermediate floor 4.3 and can rise up through it.
- the waste water 13 can be fed to the evaporation device 7 shown in FIG. 1 via the dirty water outlet 4.8 at the bottom of the sand washing device 4.
- the evaporation device 7 has an evaporator 7.1 in the form of a tank-like container which contains a start-up heater 7.2.
- the interior of the evaporator 7.1 is in contact with a condenser 7.3, which can be designed, for example, as a plate heat exchanger.
- Evaporator 7.1 and condenser 7.3 are connected via a vapor compressor 7.4, ie a Roots vacuum pump.
- the evaporation unit 7 has a heat exchanger in the form of a preheater / distillate cooler 7.5.
- the preheater 7.5 contains a dirty water inlet 7.6 and is connected to the interior of the evaporator 7.1.
- the distillate cooler 7.5 has an outlet 7.7 for the distillate 16 and is connected to the capacitor 7.3 connected.
- At the bottom of the evaporator 7.1 there is an outlet 7.8 for the concentrated waste water in the sump 7.9.
- the wastewater 13 to be evaporated is sucked through the preheater / distillate cooler 7.5 into the evaporator 7.1.
- This is done by means of the vacuum pump designed as a vapor compressor 7.4, which ensures a negative pressure by sucking off the air initially present in the evaporator 7.1.
- the incoming wastewater 13.1 is heated by means of the compressed, and thus heated, air passed through the condenser 7.3.
- the heating 7.2 can be switched on at the beginning of the process until the wastewater 13.1 boils.
- the rising water vapor 13.2 is drawn off by the compressor 7.4, brought to normal pressure and condensed in the condenser 7.3, the heat released being given off to the evaporator content 13.1.
- the distillate 16 leaves the device via the preheater / distillate cooler 7.5, releasing part of its thermal energy to the inflowing waste water 13.
- the concentrated waste water in the sump 7.9 can be discharged into a container (not shown) as soon as it has reached the desired final concentration. Then a new evaporation cycle begins.
- FIG. 9 shows the drying device 10 for washed core material 12.1 in the special configuration as a fluid bed dryer.
- the dryer housing 10.1 is a welded construction made of sheet steel and has a sand inlet funnel 10.2 and a height-adjustable sand outlet 10.3, the vertical position of which determines the layer height of the sand 12.1 in the drying device 10.
- a nozzle base 10.5 is arranged parallel to the housing base 10.4, which is designed as a sheet metal plate with bores for screwed air nozzles (not shown).
- a wind chamber 10.6 is located below the nozzle base 10.5.
- the air nozzles are designed in such a way that air can be directed upwards from the wind chamber 10.6 through the nozzle floor 10.5, but no solids can get into the wind chamber 10.6 from above even when the wind is stopped.
- the housing has in the area of the wind chamber 10.6
- thermocouple 10.9 is provided for measuring the sand temperature.
- the sand 12.1 to be dried is introduced into the housing 10.1 above the nozzle base 10.5. Air 10.8 heated to approximately 400 ° C. is blown into the wind chamber 10.6 and conducted into the sand bed 12.1 via the nozzle bottom 10.5.
- the dryer air 10.8 flows through the sand bed 12.1 in such a way that it causes the individual sand particles to detach from the layer, but does not cause the sand to be transported pneumatically.
- the sand particles are thus thoroughly mixed without being discharged from layer 12.1, which is also referred to as a fluidized bed or fluidized bed.
- Via the contact surface between solid and gas, i.e. Sand 12.1 and dryer air 10.8 quickly release the heat content of the air to sand 12.1 so that the water evaporates.
- the temperature sensor 10.9 monitors the sand temperature, the rise of which signals an insufficient sand input.
- the dried sand 14 leaves the chamber 10.1 via the sand outlet 10.3.
- nozzle material depending on the desired durability and chemical resistance (e.g. polymer, brass, stainless steel);
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Casting Devices For Molds (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02776941A EP1419024A2 (de) | 2001-08-24 | 2002-08-23 | Verfahren und vorrichtung zum entkernen wasserlöslicher giesskerne |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10141633 | 2001-08-24 | ||
DE10141633A DE10141633A1 (de) | 2001-08-24 | 2001-08-24 | Verfahren und Vorrichtung zum Entkernen wasserlöslicher Gießkerne |
EP02776941A EP1419024A2 (de) | 2001-08-24 | 2002-08-23 | Verfahren und vorrichtung zum entkernen wasserlöslicher giesskerne |
PCT/EP2002/009442 WO2003018224A2 (de) | 2001-08-24 | 2002-08-23 | Verfahren und vorrichtung zum entkernen wasserlöslicher giesskerne |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1419024A2 true EP1419024A2 (de) | 2004-05-19 |
Family
ID=7696555
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02776941A Withdrawn EP1419024A2 (de) | 2001-08-24 | 2002-08-23 | Verfahren und vorrichtung zum entkernen wasserlöslicher giesskerne |
Country Status (6)
Country | Link |
---|---|
US (1) | US20040195713A1 (de) |
EP (1) | EP1419024A2 (de) |
JP (1) | JP2005500166A (de) |
AU (1) | AU2002339451A1 (de) |
DE (1) | DE10141633A1 (de) |
WO (1) | WO2003018224A2 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0506834D0 (en) * | 2005-04-05 | 2005-05-11 | Rolls Royce Plc | Core leaching |
DE102005057891B4 (de) * | 2005-12-02 | 2007-10-18 | Gkss-Forschungszentrum Geesthacht Gmbh | Verfahren und Vorrichtung zum Verbinden eines Kunstoff-Werkstücks mit einem weiteren Werkstück |
WO2008086022A1 (en) * | 2007-01-09 | 2008-07-17 | American Consulting Technology & Research Inc. | Multi-function vacuum bag for composite part manuacture |
US8373657B2 (en) | 2008-08-15 | 2013-02-12 | Qualcomm Incorporated | Enhanced multi-touch detection |
JP5510074B2 (ja) * | 2010-05-28 | 2014-06-04 | スズキ株式会社 | 水溶性中子の除去方法及び装置 |
DE102014221994B4 (de) * | 2014-10-29 | 2023-03-30 | Bayerische Motoren Werke Aktiengesellschaft | Herstellen und Bearbeiten von Gussteilen |
CN104493100B (zh) * | 2014-12-25 | 2016-12-07 | 安徽省恒泰动力科技有限公司 | 一种铸造用水溶盐芯的冲洗装置 |
KR101829430B1 (ko) * | 2017-06-13 | 2018-02-19 | 한국생산기술연구원 | 폐순환 사재생 주물제조 시스템 |
WO2018230886A1 (ko) * | 2017-06-13 | 2018-12-20 | 한국생산기술연구원 | 폐순환 사재생 주물제조 시스템과 주물제조 모니터링 시스템 그리고 이에 구비되는 세척장치 |
KR101950022B1 (ko) * | 2017-06-13 | 2019-02-20 | 한국생산기술연구원 | 주물제조 모니터링 시스템 및 이를 이용하는 폐순환 사재생 주물제조 방법 |
KR101950026B1 (ko) * | 2017-06-13 | 2019-02-20 | 한국생산기술연구원 | 폐순환 사재생 주물제조 시스템 |
CN111673051B (zh) * | 2020-07-27 | 2022-01-14 | 康硕电气集团有限公司 | 一种用于砂型3d打印的模型清砂装置 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE408626C (de) * | 1924-02-19 | 1925-01-22 | Karl Wetzel Fa | Einrichtung zum Putzen von Gussstuecken mittels Wasser |
US1861428A (en) * | 1926-08-16 | 1932-05-31 | Allis Chalmers Mfg Co | Hydraulic cleaning plant |
CH622726A5 (en) * | 1976-12-09 | 1981-04-30 | Kohlswa Jernverks Ab | Method for knocking out silicate-bound moulding compound from a mould filled with casting |
GB2024362B (en) * | 1978-06-26 | 1983-01-06 | Worswick A | Apparatus for cleaning cores from castings |
DE3013720A1 (de) * | 1980-04-10 | 1981-10-15 | Elmar Michael Dipl.-Ing. 4150 Krefeld Veltrup | Vorrichtung zum entkernen von gussteilen mit hochdruckwasserstrahlen |
DE3537351A1 (de) * | 1985-10-19 | 1987-04-23 | Thyssen Industrie | Verfahren und vorrichtung zum herausloesen eines kerns aus keramik aus einem gussstueck |
US5089186A (en) * | 1990-07-11 | 1992-02-18 | Advanced Plastics Partnership | Process for core removal from molded products |
US6241000B1 (en) * | 1995-06-07 | 2001-06-05 | Howmet Research Corporation | Method for removing cores from castings |
DE19549469C2 (de) * | 1995-07-12 | 1999-05-12 | Eichenauer Gmbh & Co Kg F | Gießkern zum Gießformen und Verfahren zum Herstellen eines solchen Gießkerns |
-
2001
- 2001-08-24 DE DE10141633A patent/DE10141633A1/de not_active Withdrawn
-
2002
- 2002-08-23 AU AU2002339451A patent/AU2002339451A1/en not_active Abandoned
- 2002-08-23 WO PCT/EP2002/009442 patent/WO2003018224A2/de active Application Filing
- 2002-08-23 EP EP02776941A patent/EP1419024A2/de not_active Withdrawn
- 2002-08-23 US US10/487,558 patent/US20040195713A1/en not_active Abandoned
- 2002-08-23 JP JP2003522726A patent/JP2005500166A/ja not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO03018224A2 * |
Also Published As
Publication number | Publication date |
---|---|
US20040195713A1 (en) | 2004-10-07 |
DE10141633A1 (de) | 2003-03-13 |
AU2002339451A8 (en) | 2005-10-20 |
AU2002339451A1 (en) | 2003-03-10 |
WO2003018224A2 (de) | 2003-03-06 |
WO2003018224A8 (de) | 2004-08-12 |
WO2003018224A3 (de) | 2003-12-11 |
JP2005500166A (ja) | 2005-01-06 |
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