EP2803429A1 - Procédé de déformation d'une pièce moulée en forme de jatte ou de cuve à partir d'un moule en sable - Google Patents

Procédé de déformation d'une pièce moulée en forme de jatte ou de cuve à partir d'un moule en sable Download PDF

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Publication number
EP2803429A1
EP2803429A1 EP13168022.5A EP13168022A EP2803429A1 EP 2803429 A1 EP2803429 A1 EP 2803429A1 EP 13168022 A EP13168022 A EP 13168022A EP 2803429 A1 EP2803429 A1 EP 2803429A1
Authority
EP
European Patent Office
Prior art keywords
casting
box
mold
molding box
molding
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Withdrawn
Application number
EP13168022.5A
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German (de)
English (en)
Inventor
Frank Iburg
Gelson Günther Montero
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kuenkel Wagner Germany GmbH
Original Assignee
Kuenkel Wagner Prozesstechnologie GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kuenkel Wagner Prozesstechnologie GmbH filed Critical Kuenkel Wagner Prozesstechnologie GmbH
Priority to EP13168022.5A priority Critical patent/EP2803429A1/fr
Publication of EP2803429A1 publication Critical patent/EP2803429A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D33/00—Equipment for handling moulds
    • B22D33/02—Turning or transposing moulds

Definitions

  • the present invention relates to a method for demolding a cup or trough-shaped casting from a sand mold.
  • a cup or trough-shaped casting in the context of the present application is to be understood in the broadest sense, a three-dimensional hollow body having an at least partially open side.
  • the casting may, for example, the shape of a hollow pyramid, a hollow cube, a hollow part ball, a hollow cylinder or a hollow cone and geometrical modifications of these basic forms, at least this body is at least partially open on at least one side or has an opening.
  • An example of such a casting is, in particular, a brake drum or a similarly shaped component which has a substantially cup-shaped configuration with a cup bottom and a wall section adjoining it, which projects out of the cup bottom plane.
  • the orientation in which the cup-shaped casting is poured is determined relative to the gravitational field of the earth by the shape of the casting and the casting process, and more or less fixed. It has been found to be advantageous and in part necessary, especially in brake drums, to pour in an orientation in which the cup bottom is arranged in a horizontal plane and is below the cup wall extending from the cup bottom plane. In general terms, the open side of the casting is at the top. In this orientation, the highest pressure of the molten metal at the bottom of the molten bath, that is in the region of the cup base, while the open side of the casting, so the Napfwandrand, is located in the top of the molten bath.
  • the cup-shaped shape of the casting prepares problems in a process-optimized demoulding of casting and foundry sand.
  • the mandrel and components of the sand mold which are located within the istgossenenen, partially open hollow body, tend to at least partially remain in the cavity of the casting.
  • These remnants of the sand mold must be removed with appropriate procedural effort, which leads to higher costs of the casting process and larger sand losses.
  • a comprehensive removal of foundry sand is necessary both for optimizing a subsequent brushing operation and also for a cost-optimized casting operation in order to allow the highest possible return proportion of reusable molding sand.
  • This object is achieved according to the invention by a method for demolding a cup-shaped or trough-shaped casting from a sand mold, wherein a molding box comprising a lower box and a top box after a casting process with the therein sand mold and cast therein casting from a casting position, in the the upper box is located above the lower box, in a Entform ein in which the lower box is located above the upper box is turned, expelled the casting and the sand mold in the demolding by means of a Aus Stammstkovs from the molding box and placed in this orientation on a vibrating device and there be removed by vibration.
  • the process is preferably carried out in an automatic casting plant.
  • the casting is oriented in the casting position for reasons related to casting technology such that its cup bottom is at the bottom and its cup wall extends upwards out of the plane of the cup base.
  • the open side of the casting is at the top.
  • the casting In the demolding position, the casting is oriented within the scope of the invention such that the bottom of the cup is at the top and the cup wall extending out of the plane of the cup base is below the cup bottom.
  • the open side of the casting is at the bottom and mold or core sand located inside the casting can easily fall out.
  • a particular advantage of the invention is that the reorientation from the casting position takes place in the Entform ein when the casting and the sand mold are in the molding box.
  • the entire mold box is brought together with the therein sand mold and the casting located therein from the casting position in the demolding position.
  • the mold box is a unit of the automatic casting machine whose geometry, position and position are known throughout the process in all sections of a casting plant. Automated handling of the casting for demoulding Positioning of the casting and sand mold or of the turning process is ensured by the invention at a defined location, irrespective of properties of the respective casting, such as size or shape, and with fixed, reproducible timings. It is of particular advantage that the demolding-oriented positioning takes place independently of the respective casting, so that no costly conversions are required in a casting change on the casting.
  • the cast-out casting and sand mold are expelled, preferably automatically by means of an ejection punch.
  • the ejection can be done by the molding box is placed over the vibrating device and the ejection stamp moves in from above in the mold skates.
  • the vibration device is designed as a vibration conveyor, in which the casting and foundry sand are separated by vibration and at the same time conveyed out of the discharge region.
  • the casting is pushed out of the mold together with the molding sand of the sand mold, preferably downwards, and placed on the vibrating device arranged below the ejection stamp.
  • the expulsion of casting and foundry sand from the mold box takes place by the ejection stamp moves from below into the molding box and the casting out together with the molding sand up out of the molding box. Subsequently, the casting and foundry sand are placed on the vibration device and demoulded there by means of vibration. In both cases, the expulsion from the molding box takes place by a relative movement of the molding box and ejection punch. This means that the ejection punch is moved relative to the molding box or the molding box relative to the ejection punch. A combination in the form of a movement of the molding box and ejection punch is possible and is within the scope of the invention.
  • the emptied molding box is turned back out of the mold release position into the casting position. Only then does a separation of upper and lower box and their cleaning and further processing in the context of the further process cycle or a subsequent process cycle. In this way, it is ensured that upper and lower box can be handled during the entire further course in the correct orientation.
  • the turning of the molding box from the casting position into the mold release position and vice versa, from the mold release position into the casting position takes place according to one embodiment by means of a automatic turning device, preferably by means of a drum turner.
  • the turning can then advantageously be carried out separately from other process sequences and executed in a coordinated manner with respect to the entire process cycle. It is done according to a particular embodiment of the method by an angle of 180 ° about a horizontal axis.
  • the molding box is arranged for a casting on a pallet and is taken after passing through a cooling section by means of a gripping device on the lower box and lifted with casting and sand mold from the pallet.
  • the molding box can be fed by means of a gripping device of an automatic turning device. It can be fed after turning from the casting position in the Entform ein an automatic ejector in which the casting and the sand mold are expelled from the molding box. It can be taken after turning from the casting position in the Entform ein with a gripping device on the upper box, positioned over a vibrating conveyor and held relative to the ejection punch after another form of the method.
  • the empty molding box can be fed after ejection by means of a gripping device of a turning device, preferably a drum turner, where it is turned from the mold release position back into the casting position.
  • FIG. 1 shows an example of a brake drum 1 for a cup-shaped casting in the casting position.
  • the brake drum has a drum base 2 (as a cup bottom) and a drum wall 3 (as a cup wall).
  • FIG. 1 shows the brake drum in the casting position according to their orientation in the gravitational field of the earth, to illustrate the orientation of the direction of the gravitational acceleration g is indicated by the arrow g. It can be seen that the open side 4 of the brake drum 1 is at the top.
  • sprue 5 and the sand mold in partial areas, consisting essentially of the molding sand of the lower mold 6, the molding sand of the upper mold 7 and the molding sand of the core 8, which fills the cavity in the interior of the brake drum 1.
  • FIG. 2 shows the positioning of the brake drum 1 in a demolding method according to the prior art.
  • the brake drum 1 is further oriented in its casting position and is supplied in this automatic demolding.
  • Schematically represented in FIG. 2 Due to the cup-shaped shape of the brake drum 1, this residual portion of the core sand 8 is not or only with additional effort eg by separate handling of the already pronouncedtformten brake drum. 1 be separated from this.
  • FIG. 3 shows the brake drum 1 of FIG. 1 now in the Entformgna, in which it is brought according to the inventive method for the purpose of demolding.
  • the brake drum 1 is now turned by 180 ° about a horizontal axis, so that the open side 4 of the brake drum 1 is located below.
  • Entform ein shown ejection of the brake drum 1 takes place together with the molding sand of the lower mold 6, upper mold 7 and core 8 from the molding box.
  • the brake drum 1 is used with the molding sand mold sand in the context of ejection on the in FIG.
  • the vibrating conveyor 9 has in the FIG. 3 Not shown interstices through which by means of vibration of the brake drum 1 more distant and decaying molding sand can fall down.
  • the molding sand of the core 8 located inside the brake drum 1 can be easily removed by these gaps in the vibrating conveyor 9.
  • FIG. 4 now shows a section of an automatic casting, which is set up to carry out the method according to the invention. From one in FIG. 4 cooling section not shown, where castings and sand molds cool in mold boxes 10, the molding boxes 10, each consisting of an upper box 11 and a lower box 12, by means of a sliding carriage 13 a Schubtransportsystem 14 is supplied. The molding boxes 10 rest on pallets 15.
  • a lifting device 16 is provided to lift the molding boxes 10 of the pallet 15. This takes the mold box 10 on the lower box 12 and lifts it together with the top box thereon and contained in the molding box 10 casting with sand mold from the pallet 15 and moves to another push transport system 17, on which the molding box 10 is lowered.
  • the molding box 10 is fed after lowering by means of the push transport system 17 of a first turning device in the form of a drum turner 18. In this, the automatic turning of the molding box takes place together with the therein sand mold and the brake drum 1 therein from the casting position ( FIG. 1 ) in the in FIG. 3 illustrated Entformwolf.
  • the molding box 10 is conveyed with the still remaining therein sand mold with the brake drum 1 by means of the push conveyor system 17 to a further lifting device 19.
  • the latter has an ejection device 20, in which the brake drum 1 contained in the molding box 10 is expelled together with the molding sand of the sand mold by means of an ejection punch, not shown in the figures, and placed on the vibratory conveyor 9. Since the ejection of the brake drum 1 from the molding box 10 in the demolding position (see FIG. 3 ), the brake drum 1 is placed in this Entform ein on the vibrating conveyor 9, where in the interior of the Brake drum 1 contained molding sand of the core 8 can easily escape through the interstices of the vibrating conveyor 9.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
EP13168022.5A 2013-05-16 2013-05-16 Procédé de déformation d'une pièce moulée en forme de jatte ou de cuve à partir d'un moule en sable Withdrawn EP2803429A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13168022.5A EP2803429A1 (fr) 2013-05-16 2013-05-16 Procédé de déformation d'une pièce moulée en forme de jatte ou de cuve à partir d'un moule en sable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13168022.5A EP2803429A1 (fr) 2013-05-16 2013-05-16 Procédé de déformation d'une pièce moulée en forme de jatte ou de cuve à partir d'un moule en sable

Publications (1)

Publication Number Publication Date
EP2803429A1 true EP2803429A1 (fr) 2014-11-19

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EP13168022.5A Withdrawn EP2803429A1 (fr) 2013-05-16 2013-05-16 Procédé de déformation d'une pièce moulée en forme de jatte ou de cuve à partir d'un moule en sable

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EP (1) EP2803429A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113021709A (zh) * 2020-12-07 2021-06-25 苏州贝诺医疗器械有限公司 一种内镜手术用辅助探头的制造设备及方法
CN113369466A (zh) * 2021-06-09 2021-09-10 驻马店中集华骏铸造有限公司 一种制动鼓内腔残留旧砂清理工装、装置和方法
CN116352061A (zh) * 2023-04-20 2023-06-30 重庆乐迪龙鑫科技股份有限公司 一种汽车配件浇铸设备

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3273210A (en) * 1963-11-07 1966-09-20 Taccone Corp Machine for removing molds from flasks
EP0878258A1 (fr) * 1997-05-14 1998-11-18 Heinrich Wagner Sinto Maschinenfabrik GmbH Installation de moulage

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3273210A (en) * 1963-11-07 1966-09-20 Taccone Corp Machine for removing molds from flasks
EP0878258A1 (fr) * 1997-05-14 1998-11-18 Heinrich Wagner Sinto Maschinenfabrik GmbH Installation de moulage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113021709A (zh) * 2020-12-07 2021-06-25 苏州贝诺医疗器械有限公司 一种内镜手术用辅助探头的制造设备及方法
CN113369466A (zh) * 2021-06-09 2021-09-10 驻马店中集华骏铸造有限公司 一种制动鼓内腔残留旧砂清理工装、装置和方法
CN116352061A (zh) * 2023-04-20 2023-06-30 重庆乐迪龙鑫科技股份有限公司 一种汽车配件浇铸设备

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