EP0600887B1 - Vorrichtung und verfahren zum füllen von schussköpfen mit formstoffen - Google Patents

Vorrichtung und verfahren zum füllen von schussköpfen mit formstoffen Download PDF

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Publication number
EP0600887B1
EP0600887B1 EP92905153A EP92905153A EP0600887B1 EP 0600887 B1 EP0600887 B1 EP 0600887B1 EP 92905153 A EP92905153 A EP 92905153A EP 92905153 A EP92905153 A EP 92905153A EP 0600887 B1 EP0600887 B1 EP 0600887B1
Authority
EP
European Patent Office
Prior art keywords
outlet member
storage container
core
optionally
outlet
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.)
Expired - Lifetime
Application number
EP92905153A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0600887A1 (de
Inventor
Werner Landua
Reiner Rommell
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.)
Adolf Hottinger Maschinenbau GmbH
Original Assignee
Adolf Hottinger Maschinenbau 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 Adolf Hottinger Maschinenbau GmbH filed Critical Adolf Hottinger Maschinenbau GmbH
Publication of EP0600887A1 publication Critical patent/EP0600887A1/de
Application granted granted Critical
Publication of EP0600887B1 publication Critical patent/EP0600887B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/23—Compacting by gas pressure or vacuum
    • B22C15/24—Compacting by gas pressure or vacuum involving blowing devices in which the mould material is supplied in the form of loose particles

Definitions

  • the invention relates to a device for filling shot heads with molding materials, with a storage container for the molding material, an outlet member for discharging the molding material into the shooting head and a closure device for closing the outlet member. Furthermore, the invention relates to a corresponding method for using the device in question.
  • Core shooters have been known in foundry technology for many years.
  • the foundry cores or molds are usually manufactured in separate parts, brought together and connected to one another to form a casting mold.
  • An essential part of the core shooters are the so-called shot heads with the shot plates carrying the shot nozzles.
  • Molding material, in particular core sand, i.e. Quartz sand already mixed or coated with binder has so far been filled into the shot heads in question and from there it is blown or shot into the respective molds with very high air pressure through the nozzles arranged in the shot plate.
  • the shot heads are almost completely filled with core sand, the filling of the shot heads having been carried out in the respective forms regardless of the required core sand volume. Due to the always strong filling of the shooting heads, the pressure required for shooting is extremely high. This pressure is usually between four and six bar. This high pressure is necessary in particular because a considerable amount of core sand is present between the shot nozzles and the inflow point of the compressed air used for shooting.
  • the core shooting with high air pressures that was previously mandatory is extremely problematic in practice, since the sand emerging from the firing nozzles always occurs on the walls of the mold to be filled and has an extremely abrasive effect there.
  • the shot nozzles act like a sandblasting gun, so that the core sand emerging under high pressure gradually damages the shape to be filled or changes its geometry.
  • Another disadvantage of core shooting with high air pressures can be seen in the fact that the high air pressures already lead to compaction of the core sand in the injection or shooting area when the core sand is shot into the mold. Consequently, a form-fitting filling of the form is prevented, in particular in the case of complicated geometries, at least considerable density gradients are created.
  • the invention is therefore based on the object of specifying a device and a method for filling shot heads and molding materials, as a result of which the shot head can be portioned and thereby evenly filled with molding material in order to reduce the compressed air pressures required for core shooting.
  • the device according to the invention achieves the above object by the features of claim 1. Thereafter, the device mentioned above for filling shot heads with molded materials is designed and developed such that the outlet member for immersion in the shot head to be filled is held on a machine frame or the like, and is vertically movable and is freely definable in the area of its vertical mobility.
  • the shot head can always be filled depending on the volume or the geometry of the core to be fired. Furthermore, a quasi pre-compression of the molding materials to be accelerated by the shooting nozzles in the shooting head is avoided by immersing the outlet member for filling the shooting head in it, so that the molding material is carefully poured into the shooting head.
  • the outlet member is held on a machine frame or a stand or the like.
  • Range of its vertical mobility can be set as desired.
  • portions of molding material can be metered into the shot head, the metering being carried out by means of the closure device for closing the outlet member.
  • the filling of the shot head must always take place as a function of the core to be shot. Due to the lower filling quantity of the shot head, the pressures required to accelerate the molding material or sand particles or the shooting pressure can be reduced from a maximum of six bar to less than three bar. In addition to the low shot pressures, a minimal throughput time of the molding material or sand is achieved. Both the molds to be filled and the shot nozzles are effectively protected due to the lower shot pressure and therefore have a significantly longer service life.
  • the outlet member is of particular advantage if it is tubular.
  • the storage container is advantageously essentially funnel-shaped, so that at least when the outlet member connects directly to the storage container, both components together form a type of funnel with a filler neck.
  • the outlet member is held by the storage container, so that the outlet member can be moved vertically together with the storage container.
  • the outlet member is connected to the storage container via a flexible hose or the like.
  • the storage container could be arranged in a stationary manner and only the outlet member could be held so as to be vertically movable.
  • the vertical movement of the outlet member and, if applicable, of the storage container could take place in a further advantageous manner via a lifting mechanism articulated on the machine frame and acting between the machine frame and the outlet member or storage container.
  • This lifting mechanism could have at least one drive and, where appropriate, vertical guides or guide elements, so that the drive and the guides are jointly responsible for the lifting movement of the outlet member or the storage container.
  • the drive itself could be designed as a cylinder-piston arrangement, so that guidance, namely the guidance of the piston in the cylinder, would already be provided by the provision of the cylinder-piston arrangement.
  • the vertical movement of the outlet member and, if appropriate, of the storage container can be detected by means of a displacement sensor.
  • a displacement sensor can be a displacement sensor that is attached to the machine frame on the one hand, and is operatively connected to the storage container or the outlet member via a linkage on the other hand.
  • the arrangement can also be provided in the reverse sense. In any case, it is essential that the displacement sensor detects the stroke movement of the piston of the cylinder-piston arrangement relative to the machine frame.
  • the measuring sensor used to detect the relative movement between the outlet member and machine frame and thus also relative to the firing head can be carried out in a further advantageous manner and as an alternative to the configuration discussed above.
  • the displacement sensor could work inductively, capacitively or according to the eddy current principle. Optical detection would also be conceivable.
  • the displacement sensor could work by means of ultrasound and be provided, for example, as an integral part of the cylinder-piston arrangement which brings about the stroke of the outlet element, so that the movement of the piston is detected directly.
  • the outlet member and possibly the storage container as a whole can be pivoted essentially horizontally about a pivot axis.
  • This pivotability is preferably 360 °, i.e. the outlet member and possibly the storage container can be pivoted or rotated infinitely about a pivot axis.
  • the pivot axis runs essentially parallel to the outlet member, namely outside the outlet member. It is also essential that the outlet member and the pivot axis are matched to the shot head or its inlet opening in such a way that 360 ° pivoting within the shot head is possible without hitting the walls thereof.
  • the molding material or core sand to be fired or to be blown through the weft nozzles can be approximately evenly distributed within the firing head by, for example, multiple swiveling of the outlet member, so that the bulk density of the core sand which arises in the firing head has no or only insignificant density gradients.
  • a preferably electric drive motor is provided for this. It could also be a so-called servomotor act that can implement movements with millimeter precision and with any change of direction.
  • the drive motor could be operatively connected to the outlet member or the storage container by means of suitable holding means and a turntable.
  • the motor could intervene in the outer part of the slewing ring using appropriate means. Accordingly, the inner part of the slewing ring would then be firmly connected to a mounting plate or the like.
  • the drive motor for pivoting the outlet member and possibly the storage container and the cylinder-piston arrangement for lifting or lowering the outlet member or storage container could be integrated into a module in a very particularly advantageous manner.
  • the drive motor for pivoting the outlet member would then be arranged at the lower end of the cylinder-piston arrangement, i.e. firmly mounted on the emerging piston or on its extension of the cylinder-piston arrangement.
  • the closure device is arranged at the outlet end of the outlet member.
  • the core sands would be fillable or storable from the lower end of the outlet member to the upper end of the storage container. Only when the closure device is opened do the core sands - after immersing them in the shot head - enter them and preferably exclusively to the immersion depth of the outer end of the outlet member.
  • the closure device For a particularly simple and effective configuration of the closure device, it is designed as a closure flap which can be pivoted in front of the outlet end of the outlet member and at least largely seals there.
  • the closure flap thus lies approximately in the plane formed by the lower edge of the outlet member and can be pivoted in it for the outlet opening of the outlet member or pivoted away from the region of the outlet opening.
  • the outlet member and the closure flap are dimensioned such that the closure flap can be pivoted away when the outlet member is immersed in the shooting head in such a way that the outlet end is at least largely unhindered or released.
  • the pivot axis of the closure flap runs essentially parallel to the outlet member, namely outside the outlet member.
  • the pivot axis of the outlet element and the pivot axis of the closure flap essentially correspond in terms of geometry, so that the closure flap smoothing or leveling the filled-in core sand performs the same pivoting movement as the outlet element, with smoothing or Leveling of the core sand filled in the shot head results in almost the same plane.
  • the closure flap With regard to the actuation of the closure flap, it is particularly advantageous if it is pivoted by means of a cylinder-piston arrangement.
  • the linear movement of the cylinder-piston arrangement into a rotary or swivel movement of the closure flap engages the cylinder-piston arrangement via a swivel lever and a guide rod rotatable by the swivel lever on the closure flap.
  • the storage container is advantageously associated with a vibration device that vibrates the wall of the storage container. If the outlet member is firmly connected to the storage container, the vibration movement is of course also transmitted to the outlet member, so that the core sands can be effortlessly brought into the shot head. Precisely because of the vibration device, however, it is a further advantage if at least one oscillating element is arranged between the storage container or the outlet element and the machine frame, preferably between the storage container or outlet element and the rotating ring, in order to prevent vibration being transmitted to the machine frame. For example, an electric motor with an eccentric rotating or mass part could be used as the vibration device.
  • a method for filling shot heads with core sands is characterized by the following method steps: First of all, the outlet member and - in the case of a direct connection between the outlet member and the storage container - the storage container is brought into the rest position, ie into the upper position. This position ensures that the shot head can be conveyed under the outlet member. In the resting position the storage container is filled with core sand, the flap being closed. Consequently, on the one hand the outlet member and on the other hand the storage container can be filled up to the upper edge in accordance with the filling density of the core sand.
  • the shooting head is then positioned under the outlet member.
  • the positioning of the shot head under the outlet member can also take place at an earlier point in time, for example before the storage container is filled with core sand. It only has to be ensured that there is sufficient space under the outlet member for positioning the shot head.
  • the outlet member is immersed in the shot head, the immersion depth being predetermined by the required filling of the shot head with core sand. This filling in turn depends on the volume and the realizable density of the core to be fired.
  • the outlet member In the immersed state, the outlet member is in its working position.
  • the closure flap is at least partially opened - for partial filling of the shot head to a predetermined filling level. Due to the immersion depth, the filling takes place essentially to the lower edge of the outlet element. If necessary, the outlet member is closed by the closure flap, whereby the closure flap roughly smoothes out the filled core sand.
  • the outlet member is moved within the possible 360 ° rotation or pivoting into a further working position at a given immersion depth, so that the area next to the previously filled point within the shot head can be filled further. So in a further position the outlet member is opened again by the closure flap and the filling process can be repeated as required with different positions of the outlet member until the desired fill level is reached. Likewise, the outlet member can gradually after filling the shot head are pulled upwards, so that a predeterminable filling height can be achieved with the lowest possible falling height of the core sand particles. Thus there is only a certain bulk density of the core sands within the shot head, but in no case a compression corresponding to the tap density or even a higher density.
  • the filled-in core sand is smoothed out both by the pivoting movement of the closure flap and by the pivoting movement of the outlet element itself. This enables an exact filling dimension to be achieved. Repeated swiveling or filling enables the realization of any filling heights.
  • outlet member is closed by the closure flap when the shot head is sufficiently filled and pulled out of the shot head into its rest position.
  • Fig. 1 shows a sectional schematic representation of a device for filling shot heads 1 with molding materials, wherein the embodiment chosen here is core sand.
  • Essential components of the device are a storage container 3 for core sand 2, an outlet member 4 for discharging the core sand 2 into the shot head 1 and a closure device 5 for closing the outlet member 4.
  • the outlet member 4 is vertically movably mounted on a machine frame 6 for immersion in the shooting head 1 to be filled and can be arbitrarily - steplessly - fixed in the area of vertical mobility.
  • Fig. 1 shows in connection with Fig. 2 that the outlet member 4 is substantially tubular.
  • the storage container 3 is funnel-shaped.
  • Fig. 1 further clearly shows that the outlet member 4 connects directly to the storage container 3, so that the outlet member 4 is held by the storage container 3 and together with the storage container 3 is vertically movable.
  • the vertical movement of the outlet member 4 or the outlet member 4 together with the storage container 3 takes place via an articulated on the machine frame 6 and acting between the machine frame 6 and the outlet member 4 or the storage container 3.
  • the lifting mechanism 7 has in the embodiment chosen here two drives, which also serve as vertical guides. More specifically, these are cylinder-piston arrangements 8.
  • the vertical movement of the outlet member 4 or the storage container 3 can be detected by means of a non-contact displacement sensor 9.
  • This displacement sensor 9 detects the stroke movement of the piston 10 of the cylinder-piston arrangement 8 relative to the machine frame 6.
  • the displacement sensor 9 works by means of ultrasound.
  • FIG. 1 and 2 show together that the outlet member 4 and the storage container 3 as a whole are endless about a pivot axis 11, i.e. can be swiveled horizontally through 360 ° and more.
  • the pivot axis 11 runs parallel to the outlet member 4 and specifically outside the outlet member 4.
  • FIG. 2 shows that the outlet member 4 and the pivot axis 11 are matched to the shooting head 1 or its inlet opening 12 such that the 360 ° Swiveling within the shot head 1 is easily possible.
  • FIG. 1 further shows that the drive motor 13 for pivoting the outlet member 4 or the storage container 3 and the cylinder-piston assembly 8 for lifting and lowering the outlet member 4 are integrated into one assembly.
  • Fig. 1 further clearly shows that the closure device 5 is arranged at the outlet end 16 of the outlet member 4. More precisely, the closure device 5 is designed as a closure flap 17 which can be pivoted in front of the outlet end 16 of the outlet member 4 and largely seals there. The outlet member 4 and 2, the closure flap 17 is dimensioned such that the closure flap 17 can be pivoted away when the outlet member 4 is immersed in the firing head 1 in such a way that the outlet end 16 is uncovered overall.
  • FIG. 1 shows that the closure flap 17 is pivotable about a pivot axis extending substantially parallel to the outlet member 4.
  • the figures show overall that the pivot axis 11 of the outlet member 4 and the pivot axis 18 of the closure flap 17 correspond approximately geometrically. It is also essential that the closure flap 17 can be fixed in any pivot position in the entire pivot range, two pivot positions being indicated in the illustration selected in FIG. 2.
  • closure flap 17 is pivoted by means of a cylinder-piston arrangement 19.
  • This cylinder-piston arrangement 19 is operatively connected to the closure flap 17 via a swivel lever 20 and a guide rod 21.
  • the linear movement of the cylinder-piston arrangement 19 - via the pivot lever 20 and the guide rod 21 - can be transformed into a pivoting movement of the closure flap 17.
  • Fig. 1 further shows that the storage container 3 is associated with the wall 22 of the storage container 3 vibrating vibrating device 23. So that the vibration used to shake the core sand into the outlet member 4 does not propagate to the machine frame 6, a vibration element 24 is provided to prevent vibration transmission to the machine frame 6, which is installed between the outlet member 4 or the storage container 3 and the rotating ring 15 .
  • the storage container 3 and the outlet element 4 can be provided with a weighing device for the exact determination of the filling quantity of the shot head 1.
  • This weighing device would determine the weight difference between the empty storage container or empty outlet member and the storage container or outlet member filled with core sand in a particularly advantageous manner. It would also be possible to monitor the filling of the shot head precisely by means of a weight loss, with the desired pouring level being easily predeterminable via the weight and with known density or bulk density.
  • the core of the present invention - precise setting of the filling quantity of molding material required for producing a core with approximately the same distribution of the molding material within the shot head - can also be realized with other filling devices or shot heads.
  • the exemplary embodiment mentioned above merely serves to understand the teaching according to the invention, but does not restrict it.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
EP92905153A 1991-08-30 1992-02-18 Vorrichtung und verfahren zum füllen von schussköpfen mit formstoffen Expired - Lifetime EP0600887B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4128952 1991-08-30
DE4128952A DE4128952C1 (enrdf_load_stackoverflow) 1991-08-30 1991-08-30
PCT/DE1992/000113 WO1993004800A1 (de) 1991-08-30 1992-02-18 Vorrichtung und verfahren zum füllen von schussköpfen mit formstoffen

Publications (2)

Publication Number Publication Date
EP0600887A1 EP0600887A1 (de) 1994-06-15
EP0600887B1 true EP0600887B1 (de) 1995-05-03

Family

ID=6439556

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92905153A Expired - Lifetime EP0600887B1 (de) 1991-08-30 1992-02-18 Vorrichtung und verfahren zum füllen von schussköpfen mit formstoffen

Country Status (7)

Country Link
US (1) US5458180A (enrdf_load_stackoverflow)
EP (1) EP0600887B1 (enrdf_load_stackoverflow)
JP (1) JP2641109B2 (enrdf_load_stackoverflow)
CA (1) CA2111574C (enrdf_load_stackoverflow)
DE (1) DE4128952C1 (enrdf_load_stackoverflow)
ES (1) ES2074356T3 (enrdf_load_stackoverflow)
WO (1) WO1993004800A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111556798A (zh) * 2018-02-23 2020-08-18 新东工业株式会社 防止因型腔部的偏移而引起的不良的方法

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4326180C2 (de) * 1993-08-04 1997-01-30 Hottinger Adolf Masch Schußkopf für eine Kernschießmaschine
DE4334117C2 (de) * 1993-10-07 1997-01-30 Hottinger Adolf Masch Vorrichtung zum Füllen von Schußköpfen
DE4334118C2 (de) * 1993-10-07 1997-01-30 Hottinger Adolf Masch Vorrichtung zum Füllen von Schußköpfen
IT233503Y1 (it) * 1994-06-15 2000-01-28 Imr S R L Ora Imr S P A Macchina spara anime per la realizzazione di anime per lo stampaggio in conchiglia
ES1045359Y (es) * 2000-02-15 2001-02-16 Loramendi Sa Cabezal de soplado para maquinas sopladoras de machos
US7819168B2 (en) * 2006-07-27 2010-10-26 Hunter Automated Machinery Corporation Method and apparatus for transferring sand into flask of molding machine
CN103639370B (zh) * 2013-11-29 2015-07-22 杨国能 飞轮的铸造方法
CN104923744A (zh) * 2015-06-25 2015-09-23 宁波众发机械模具有限公司 一种冷芯机
CN107350434A (zh) * 2017-08-29 2017-11-17 禹州市昆仑模具有限公司 一种双射头射芯机
US10835952B2 (en) * 2017-10-20 2020-11-17 Hunter Foundry Machinery Corporation Method and apparatus for forming sand molds via top and bottom pneumatic sand filling perpendicular to the pattern plate
CN109158550B (zh) * 2018-09-27 2024-05-28 福建丰力机械科技有限公司 射沙斗机构及其使用方法

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DE172693C (enrdf_load_stackoverflow) *
AT44665B (de) 1906-08-28 1910-10-25 Pohlig Aktien Ges J Vorrichtung zum Beschicken von Hochöfen mit einfachem Gichtverschluß.
DE839247C (de) * 1950-04-19 1952-05-19 Masch U Werkzeugfabrik Kabel Steuerung fuer Sandblasformmaschinen
FR1178936A (fr) * 1957-07-16 1959-05-19 Loire Atel Forges Machine automatique pour l'obtention, par soufflage, de noyaux de fonderie prêts à l'emploi
DE2241507A1 (de) * 1972-08-21 1974-03-07 Baker Perkins Ltd Verfahren und vorrichtung zur herstellung von giessereiformen und giessereikernen
DE2304564A1 (de) * 1973-01-31 1974-08-08 Cobomat Apparatebau Gmbh Vorrichtung zur automatischen herstellung von formen und kernen fuer giessereizwecke
JPS5597845A (en) * 1979-01-19 1980-07-25 Naniwa Seisakusho:Kk Sand replenishing device of mold molding machine
JPS5832542A (ja) * 1981-08-21 1983-02-25 Sintokogio Ltd 吹込式鋳型造型機における砂供給装置
JPS59153045U (ja) * 1983-03-30 1984-10-13 トヨタ自動車株式会社 ブロ−イング装置
DE3422687C1 (de) * 1984-06-19 1985-06-13 Adolf Hottinger, Gießerei und Maschinenbau GmbH, 6800 Mannheim Kern- und Maskenschiessmaschine
FR2594363B1 (fr) * 1986-02-19 1988-06-17 Kuhn Sa Machine a trier des noyaux de fonderie
JPH0787965B2 (ja) * 1988-04-25 1995-09-27 旭テック株式会社 砂調節装置付中子成型機

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111556798A (zh) * 2018-02-23 2020-08-18 新东工业株式会社 防止因型腔部的偏移而引起的不良的方法

Also Published As

Publication number Publication date
WO1993004800A1 (de) 1993-03-18
JP2641109B2 (ja) 1997-08-13
JPH06507837A (ja) 1994-09-08
CA2111574C (en) 1999-01-19
CA2111574A1 (en) 1993-03-01
ES2074356T3 (es) 1995-09-01
EP0600887A1 (de) 1994-06-15
US5458180A (en) 1995-10-17
DE4128952C1 (enrdf_load_stackoverflow) 1992-07-09

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