EP3349923A1 - Method for producing a riser in a core shooter, and core box suitable for performing the method - Google Patents
Method for producing a riser in a core shooter, and core box suitable for performing the methodInfo
- Publication number
- EP3349923A1 EP3349923A1 EP16763261.1A EP16763261A EP3349923A1 EP 3349923 A1 EP3349923 A1 EP 3349923A1 EP 16763261 A EP16763261 A EP 16763261A EP 3349923 A1 EP3349923 A1 EP 3349923A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- king
- membrane
- feeder
- riser
- diameter
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 title claims description 22
- 238000005266 casting Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000012528 membrane Substances 0.000 claims description 37
- 239000007788 liquid Substances 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 230000002441 reversible effect Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000005058 metal casting Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 1
- 238000004904 shortening Methods 0.000 claims 1
- 239000002184 metal Substances 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 150000002739 metals Chemical class 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/06—Core boxes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
Definitions
- the invention relates to a method for producing a feeder intended for insertion into a mold used in the casting of metals, consisting of an inner cavity enclosing a feeder volume consisting of an exothermic and / or insulating feeder material, in each case a lateral wall region, a lid region and a feeder opening for connecting the inner cavity of the feeder body to the mold cavity of the mold during the casting process is formed in the bottom region and the inner cavity in at least a portion of a larger diameter than the diameter of the mold cavity Having feed opening, and wherein the feeder body is produced by shooting in a core shooter.
- the invention further relates to a core box suitable for producing a feeder body for use in the core shooting machine.
- the feeders In foundry technology, it is often necessary to place additional feeders in the molds, whose feeder body fills with the liquid metal during the casting of the casting and compensates for volume deficits which occur during the solidification of the casting, in order to prevent voids being formed in the casting.
- the feeders must be such that the liquid metal fed into them later than the casting solidifies so that during the Festarrungsvorganges a material transport can take place towards the casting out that feeds the casting.
- the feeders consist of an exothermic and / or insulating material.
- Essential for the suitability of a feeder is its feeder module as the ratio of the feeder volume to the surface of the feeder, which is a geometric index of the rate of solidification of the occurred during the casting process in the inner cavity of the feeder metal.
- the inner cavities of feeders are often cylindrical, which facilitates their manufacture in a core shooter because the cylindrical shape of the inner cavity to be formed in the feeder body does not impose any special requirements for the formation of the corresponding mold for a core shooter.
- Advantageous with regard to the feeder module are, however, internal cavities with a barrel-like or spherical shape approximated shape, with more complicated cavity geometries for casting reasons can be sought, as described for example with respect to a feeder in DE 295 10 068 U l.
- the invention provides a method in which for forming a one-piece feeder body with the predetermined shape in a two-piece core box with lower box and upper box formed a the outer contour of the feeder body reproducing cavity and in this cavity for producing the inner cavity in the feeder body in his
- the feeder body is rotated, its wall region, cover region and bottom region are each formed by the feeder material introduced into the space between the expanded king and the inner wall of the cavity, wherein the feeder opening arranged in the bottom region of the feeder body is replaced by a feeder opening a first diameter predetermining foot portion of the king is formed and the king in its unexpanded position does not project beyond the diameter of the foot portion, so that the finished shot feeder body can be removed from the king during removal from the core box with its mouth opening.
- the invention has the advantage that the core technology for producing the inner cavity of a feeder body produced in core shooting method is replaced by the king expandable in its outer contour, wherein the space occupied by the expanded king within the executed in the core box and the outer contour of the feeder body the cavity of the finished cavity Feeder body trains.
- the expansion of the king takes place deliberately by means of a separate drive and is reversible, so that the king takes his original initial shape again after the casting operation.
- the feeder body Since the king in its initial shape, ie in its unexpanded position, does not project beyond the diameter of its foot opening defining the feeder opening, the feeder body is removable from the king during demolding, the feeder body sliding with its feeder opening over the full length of the king, or Alternatively, the king from the core box and thus out of the inner cavity of the feeder body produced by the shooting process can be moved out, so that the feeder body can be removed from the core box or from the lower and upper box.
- the king consists of a solid mandrel and of a flexible membrane enclosing it and the membrane is deliberately expanded by setting the king in the cavity formed in the core box by means of an enlargement of its diameter.
- the arrangement of the separate, made of a flexible material membrane gives the possibility to easily provide for a widening of the king.
- a specification of the shape of the inner cavity of the subsequent feeder body can be made, so that different contours of the inner cavity can be made by appropriately manufactured feeders.
- a gaseous or liquid medium is introduced into the intermediate space between the membrane and the fixed mandrel for the targeted widening of the membrane and is discharged from the intermediate space for demolding the shot feeder body.
- the medium acts as a separate drive.
- the expandable king may alternatively be provided that in the space between the membrane and the fixed mandrel extending over the length of the king, is arranged between two mandrel associated abutments spring element is arranged whose diameter decreases in a reduction of Increased distance between the abutments and thereby expands the outer membrane targeted, and which regained its original elongated shape at a subsequent increase in the distance to the starting position of the king.
- the spring element acts as a separate drive for the expansion of the king.
- a fixed base plate associated with the mandrel and a relative to the base plate and the mandrel in the direction of the core box-bearing base plate movable clamping plate is associated with a first Abutment for the spring element forming projection along the mandrel in an opening located in the base plate is retractable and thereby shortens the distance to a formed at the upper end of the mandrel second abutment and causes the increase in diameter of the spring element.
- the spring element encompassing the mandrel is supported against the two abutments by a flange formed at both its ends and the expandable membrane extends between the flanges of the spring element.
- the existing membrane of a flexible material is attached to the flanges of the spring element, so that the membrane follows the movements of the spring element in each case.
- the spring element consists of a per se known basket spring, which automatically resumes its original shape after a induced by applying a voltage change in shape.
- the invention further relates to a suitable for carrying out the manufacturing process core box, which consists of a top box and a lower box and an adjustable in the core box King;
- the king is reversibly in his outer contour reversible by a drive king expandable.
- the king consists of a solid mandrel and of a flexible membrane enclosing it and the membrane can be expanded by means of an enlargement of its diameter.
- At least one line is connected to the intermediate space between the fixed mandrel and the membrane, by means of the targeted expansion of the king, a gaseous or liquid medium in the intermediate space can be introduced and led out of the intermediate space.
- a spring element is arranged in the intermediate space between the fixed mandrel and the membrane for targeted expansion of the king by the voltage of which the diameter of the membrane can be enlarged and returned by the subsequent end of the diameter of the membrane in the initial state.
- Fig. 1 shows a core box for shooting a feeder body with a
- FIG. 2 shows the subject of FIG. 1 according to the method of a clamping plate and thereby effected expansion of the king
- FIG. 3 shows the object of FIG. 2 after the feeding in of the feeder material
- FIG. 4 shows the object of FIG. 3 after the return of the clamping plate and thereby effected return of the king to its initial shape
- Fig. 5 shows the subject matter of Fig. 4 during the demolding of the shot feeder body with removed top box of the core box.
- the core box 10 shown schematically in FIG. 1 for producing a feeder body in the core shooting method consists of a lower box 11 and an upper box 12, the core box 10 standing on a base plate 13. Inside the core box 10, a cavity 14 is jointly formed in the lower box 1 1 and upper box 12, which emulates the outer contour of the feeder body to be produced. In this cavity protrudes into a king 15, which stands on a stationary base plate 16.
- the king 1 5 consists of a fixedly connected to the base plate 16 mandrel 17, a mandrel 17 enclosing the spring element 1 8, which in the illustrated Embodiment can be interpreted as a conventional basket spring, and from a spring element 1 8 outside enclosing membrane 19, which in turn consists of a flexible material.
- the spring element 1 8 has at its upper and lower end in each case a circumferential flange 20, wherein the membrane 19 extends between these flanges 20 and is secured to the flanges such that the membrane 19 follows the movements of the spring element 1 8 e in each case ,
- the spring element 1 8 acts as a separate drive for the targeted expansion of the king 15th
- clamping plate 27 is arranged, which is acted upon by a correspondingly movable feed rods 26 existing drive device 25.
- the clamping plate 27 has a projection 23 which projects into an opening formed in the base plate 1 1 opening 24 and in each case in abutment against the lower flange 20 of the spring element 1 8.
- the spring element 1 8 supported at the upper end to a second, fixed at the upper end of the mandrel 17 stationary abutment 2 1 the distance between the two abutments 21, 22 is shortened, so that an increase in the diameter of the spring element 20 the result is.
- a feeder body 3 1 is formed with lateral wall portion 32, cover portion 33 and bottom portion 34, wherein the inner cavity 36 has a nearly spherical shape corresponding to the space occupied by the king in the expanded form corresponding to FIG. 2.
- a feeder opening 35 is formed by the diameter of the over the displaced lower flange 20 of the spring element 1 8 trained foot portion 37 of the king 15.
- the feeder body 3 1 can be removed from the lower box 1 1 which is open so far, wherein the feeder opening 35 can slide over the length of the unexpanded king 15.
- the existing between the fixed mandrel 1 7 and the diaphragm 19 gap is widened by means of an insertable into the gap liquid or gaseous medium, so that the outer diameter of the diaphragm 19 correspondingly increased and thereby the as feeder volume of the feeder body
- liquid or gaseous medium as a separate drive for the targeted expansion of the king 15. This is associated with a corresponding constructive simplification of the apparatus or core box required for carrying out the method.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Closures For Containers (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL16763261T PL3349923T3 (en) | 2015-09-14 | 2016-09-09 | Method for producing a riser in a core shooter, and core box suitable for performing the method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015115437.4A DE102015115437A1 (en) | 2015-09-14 | 2015-09-14 | Method for producing a feeder in a core shooter and core box suitable for carrying out the method |
PCT/EP2016/071292 WO2017046007A1 (en) | 2015-09-14 | 2016-09-09 | Method for producing a riser in a core shooter, and core box suitable for performing the method |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3349923A1 true EP3349923A1 (en) | 2018-07-25 |
EP3349923B1 EP3349923B1 (en) | 2019-08-21 |
Family
ID=56893978
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16763261.1A Active EP3349923B1 (en) | 2015-09-14 | 2016-09-09 | Method for producing a riser in a core shooter, and core box suitable for performing the method |
Country Status (6)
Country | Link |
---|---|
US (1) | US10406595B2 (en) |
EP (1) | EP3349923B1 (en) |
CN (1) | CN108290206B (en) |
DE (1) | DE102015115437A1 (en) |
PL (1) | PL3349923T3 (en) |
WO (1) | WO2017046007A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3695917B1 (en) | 2019-02-13 | 2021-11-03 | GTP Schäfer Gießtechnische Produkte GmbH | Feeder insert, method for producing a feeder body for the feeder insert and king and core box for producing a feeder body box |
DE102019104180A1 (en) * | 2019-02-19 | 2020-08-20 | Chemex Foundry Solutions Gmbh | One-piece feeder body for use in casting metals |
CN112756557A (en) * | 2020-12-31 | 2021-05-07 | 四川共享铸造有限公司 | Atmospheric pressure spherical sand riser sleeve and manufacturing method thereof |
DE102021104435A1 (en) | 2021-02-24 | 2022-08-25 | Chemex Foundry Solutions Gmbh | Vertically split feeder for use in casting metals in molds and method of making same |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4858673A (en) | 1987-10-22 | 1989-08-22 | Caldo Internationa, Inc. | Riser construction |
DE29510068U1 (en) | 1995-06-28 | 1996-10-31 | Chemex Gmbh | Feeders for use in casting molten metal |
JPH11277182A (en) | 1998-03-30 | 1999-10-12 | Hodogaya Ashland Kk | Manufacture of sleeve for feeder |
JP3344966B2 (en) | 1999-04-12 | 2002-11-18 | 保土谷アシュランド株式会社 | Method for manufacturing sleeve for feeder |
CN201500764U (en) * | 2009-04-24 | 2010-06-09 | 江苏钢锐精密机械有限公司 | Riser runner molding tooling |
CN102198489B (en) * | 2011-05-13 | 2013-01-02 | 无锡小天鹅精密铸造有限公司 | Insulation riser and moulding method thereof |
CN102363205A (en) | 2011-11-11 | 2012-02-29 | 济南圣泉倍进陶瓷过滤器有限公司 | Spherical riser and die and method for preparing same |
EP2925466B1 (en) * | 2012-11-29 | 2018-03-14 | GTP-Schäfer Giesstechnische Produkte GmbH | Method for producing a feeder having an exothermic feeder body and an insulating external shell |
-
2015
- 2015-09-14 DE DE102015115437.4A patent/DE102015115437A1/en not_active Withdrawn
-
2016
- 2016-09-09 WO PCT/EP2016/071292 patent/WO2017046007A1/en active Application Filing
- 2016-09-09 US US15/760,218 patent/US10406595B2/en not_active Expired - Fee Related
- 2016-09-09 PL PL16763261T patent/PL3349923T3/en unknown
- 2016-09-09 CN CN201680053310.7A patent/CN108290206B/en active Active
- 2016-09-09 EP EP16763261.1A patent/EP3349923B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN108290206B (en) | 2019-11-15 |
EP3349923B1 (en) | 2019-08-21 |
CN108290206A (en) | 2018-07-17 |
PL3349923T3 (en) | 2019-12-31 |
US10406595B2 (en) | 2019-09-10 |
WO2017046007A1 (en) | 2017-03-23 |
US20180257132A1 (en) | 2018-09-13 |
DE102015115437A1 (en) | 2017-03-16 |
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