DE102011120209A1 - Device, useful to generate pourable markings on core or mold for casting of molded part, includes position-variable mechanical units, an elastically deformable element, and a system to produce and transmit restoring force to position units - Google Patents

Abstract

The device comprises: position-variable mechanical units (4) arranged at a defined position of a mold illustrating a core or a model, a mold element or a mold box illustrating a mold cavity of a casting mold so that, during the production of the core or the casting mold, bulges (11) or recesses are formed in a surface of the core or the casting mold during a casting process, where the entire bulges or recesses formed by the mechanical units constitute a marking code; and an elastically deformable element (8) arranged in a direction of the surface of the core or a surface of the casting mold. The device comprises: position-variable mechanical units (4) arranged at a defined position of a mold illustrating a core or a model, a mold element or a mold box illustrating a mold cavity of a casting mold so that, during the production of the core or the casting mold, bulges (11) or recesses are formed in a surface of the core or the casting mold during a casting process, where the entire bulges or recesses formed by the mechanical units constitute a marking code; an elastically deformable element (8) arranged in a direction of the surface of the core or a surface of the casting mold before the mechanical units formed by the bulges or recesses; a system for producing and transmitting a restoring force configured to position the mechanical units; and a control system for adjusting the marking code, where the control system is connected to the system for producing the force. The mechanical units are designed as a movable plunger within a base body between two positions, where the plunger is moved back and forth by the system to produce and transmit the force between the two positions. The deformable element: determines the surface of the core or the surface of the mold cavity of the casting mold; and comprises inlet openings formed as blind holes (10), where the inlet openings are arranged corresponding to channels (2) of the base body leading the plunger, and the plunger is engaged into the inlet openings. A bottom of the blind holes is elastically deformable by the plunger. The plunger in all positions of its to-and-fro movement is partially engaged into the blind holes. The bottom of the blind holes is not covered by the plunger in a deformed state. The surface of the deformable element facing away from the blind holes is flat. The blind holes are convexly curved so that the surface of the deformable element is formed corresponding to a bathing of the blind hole of the recess. A coupling element is arranged between the plunger and the bottom of the blind hole. Each plunger is positionable in three positions, where the bottom of the blind hole is elastically deformed in a first advanced position of the plunger such that the surface of the deformable element, which is outwardly arched (concave) in a second advanced position and inwardly arched (convex) in a third advanced position, determines the surface of the core or the surface of the mold cavity of the casting mold corresponding to the bottom of a blind hole.

Description

The invention relates to a device for producing a pourable marking on a core or on a casting mold, preferably on a sand core or on a sand mold, for the casting of a casting.

To make foundry products in series production clearly identifiable, it requires a clear identification. To avoid errors by swapping a marking of the casting is sought at the earliest possible date of the production process. The aim is a direct identification of the casting during the prototyping.

Known from the prior art is the arrangement of a casting clock in a surface of the mold cavity of a casting mold which determines the casting surface. Such a casting is used for example in the DE 199 58 123 C2 described. For casting molds or cores such Gießuhren are not applicable. In addition, the amount of information a casting timer is comparatively low.

From the DE 199 25 674 B4 It is known to provide a die with the provision of a mold which is attached prior to casting to a mold surface which defines the casting surface. The code plate is designed so that it decays after the solidification of the casting. To identify the demolded casting, the casting of the code tile in the surface of the casting is read by a device. However, the solution has the disadvantage that a swapping of the code tiles is possible. The uniqueness of the marking of a casting is thus not given beyond doubt. The solution also requires additional steps, namely the manufacture and insertion of the code plate into the mold.

Another method of producing pourable markings on a sand core or on a sand casting mold is to subsequently incorporate engraving into the surface of a finished sand core or of a finished sand casting mold which determines the casting surface.

Oliver Fehr describes in "PTS - item tracking in the foundry" (Foundry 94 (2007), No. 7, pages 78-82) the introduction of a pourable engraving in a finished sand core by means of a laser. However, the laser engraving technique can only be partially integrated into existing automated plants for the production of sand cores or sand casting molds. It also represents an additional step in the production of sand cores and is associated with high costs. in the Article "Fine traces in the sand: Judge engraving plants label low-priced sand cores in foundries" (http://www.werkzeugforum.de/Feine_Spuren_im_Sand_Richter-Gravieranlagen_beschriften_preiswert_Sandkerne_in.4392.98.html) the introduction of an engraving into the surface of the finished sand core defining the casting surface is described by means of a special engraving stylus and an automated engraving machine. Also, the production of an engraving in the surface of a finished sand core by means of a engraving stylus and an automated engraving is an additional step and is associated with significant additional costs.

The analysis of the prior art shows that known solutions for producing a pourable marking on a core or on a casting mold, in particular on a sand core or on a sand casting mold, either are not sufficiently secure as far as the uniqueness of the marking of a casting to be casted is concerned can not or only with great effort into existing automated plants for the manufacture of cores or molds integrate and are associated with significant additional costs. In addition, all known solutions for producing a pourable marking on a core or on a casting mold are associated with at least one additional working step in the manufacture of a core or on a casting mold.

The object of the invention is to provide a device for producing a pourable marking on a core or on a casting mold for the casting of a casting, which avoids the aforementioned disadvantages.

The object of the invention is achieved by a device for producing a pourable marking on a core or on a casting mold for the casting of a casting with the features of the first claim. Claims 2 to 8 describe advantageous developments of the device.

• a) mehrere positionsvariable mechanische Mittel, die an einem definierten Ort der den Kern abbildenden Form oder des den Formhohlraum der Gießform abbildenden Modells, Formelementes oder Formkastens so angeordnet sind, dass bei der Fertigung des Kernes oder der Gießform abgießbare Aufwölbungen oder Ausnehmungen in einer beim Gießprozess die Oberfläche des Gussteiles bestimmenden Oberfläche des Kernes oder der Gießform ausgebildet werden, wobei die Gesamtheit der von den positionsvariablen mechanischen Mittel ausgebildeten Aufwölbungen oder Ausnehmungen einen Markierungscode darstellen,
• b) ein in Richtung der Oberfläche des Kernes oder der Oberfläche der Gießform vor den die abgießbaren Aufwölbungen oder Ausnehmungen ausbildenden positionsvariablen mechanischen Mitteln angeodnetes elastisch verformbares Element,
• c) ein System zur Erzeugung sowie zur Übertragung einer Stellkraft zur Positionierung der positionsvariablen mechanischen Mittel und
• d) ein mit dem System zur Erzeugung einer Stellkraft verbundenes Steuerungssystem zur Einstellung des Markierungscodes.

A device according to the invention comprises at least

• a) a plurality of variable position mechanical means, which are arranged at a defined location of the core forming mold or the mold cavity of the mold model, mold element or mold box so that in the manufacture of the core or the mold pourable bulges or recesses in a casting process the surface of the casting defining surface of the core or the casting mold are formed, wherein the entirety of the bulges formed by the position variable mechanical means or Recesses represent a marking code,
• b) an elastically deformable element disposed in the direction of the surface of the core or the surface of the casting mold in front of the position-variable mechanical means forming the pourable bulges or recesses,
• c) a system for generating and transmitting a force for positioning the position-variable mechanical means and
• d) a control system connected to the system for generating an actuating force for setting the marking code.

The position-variable mechanical means are preferably designed as plungers movable within at least two positions within a base body. The plungers are arranged in channels formed in the body, each movable separately and are slidably reciprocated by the system for generating and transmitting a force between the at least two positions in the channels, wherein in a first advanced position against the elastically deformable Press element and bulge this, so that in the surface of the core or the surface of the casting cavity of the mold-defining surface of the elastically deformable element is formed a bulge, and in a second retracted position, the elastically deformable element does not deform.

The elastically deformable element preferably has blind holes as inlet openings for the plungers, which are arranged corresponding to the channels located in the base body. The plungers engage the channels at least in the first advanced position and press against the bottom of the blind hole, deforming as described above so that a bulge is formed in the surface defining the surface of the mold or the surface of the mold cavity cavity , Particularly preferably, the elastically deformable element and the blind holes in the elastically deformable element are formed so that the plunger engage at least partially in the blind holes in all positions of their reciprocating motion.

The bottom of the blind holes may be formed flat and also the blind holes facing away from the surface of the elastically deformable element, which determines the surface of the core or the surface of the casting cavity of the mold, which then remains flat in the not deformed by the plunger condition. The surface facing away from the blind holes surface of the elastically deformable element may be formed in the region of one, several or all blind holes corresponding to a blind hole also convex, so that in not deformed by the ram state in the surface of the elastically deformable element, the surface the core or the surface of the casting cavity of the mold determines, in each case a recess is formed in the region of the bottom of a blind hole.

Between a plunger and the bottom of a blind hole, a coupling element may be provided to couple the bottom of a blind hole to a plunger so that it follows each reciprocation of the plunger and corresponding bulges or recesses in the surface of the elastically deformable element, the Surface of the core or the surface of the casting cavity of the mold determine, are formed.

A plunger may also be positionable in more than two positions of reciprocation, for example in three positions. He may then press in a first advanced position against the elastically deformable element and this bulge, so that corresponding to the bottom of a blind hole, d. H. in the effective region of the plunger, in which the surface of the core or the surface of the casting cavity of the mold-defining surface of the elastically deformable element is formed a bulge. In a second retracted position of the plunger corresponding to the bottom of a blind hole a recess in the surface of the core or the surface of the casting cavity of the mold defining surface of the elastically deformable element is formed and in a third position of the plunger which is the surface of the core or the Be surface of the casting cavity of the mold-defining surface of the elastically deformable element in the effective range of the plunger flat.

In order to generate a matrix code as a pourable marking, a plurality of positionally variable mechanical means, for example in the form of movable tappets sliding in channels, are arranged in a base body, the totality of the arranged channels or tappets forming a matrix. The surface of a core or the surface of a casting cavity of a mold defining surface of the device is arranged by a arranged on the base body, the openings of the movable plunger leading channels covering elastic element. Each ram is individually controlled by the system for generating and transmitting a force and can be positioned depending on the training in two or more positions. The control system generates a matrix code consisting of bulges and recesses or flat surface sections, which is generated by the system for generating and causes the transmission of a force corresponding positions of the plunger. Depending on the position of a plunger, a bulge, a recess or a planar surface section is formed in the surface of the elastically deformable element which determines the surface of the core or the surface of the casting cavity of the casting mold at the location corresponding to the plunger. The totality of the bulges, recesses or planar surface sections form the matrix code.

The introduction of pourable markings in a core or a casting mold for the casting of a casting has the advantage that the device for producing these pourable markings is not burdened by the casting process and therefore does not have to be designed for correspondingly high temperatures.

The device according to the invention can be used, in particular, for producing a pourable marking on a sand core or on a sand casting mold. However, it can also be used with advantage for the production of a pourable marking on a wax core or on a wax mold and on a core or a casting mold for the lost foam process.

The particular advantage of the device according to the invention is that the position-variable mechanical means not directly with the molding material, for. As molding sand of the sand core or the sand mold, come into contact with components of the molding material binder or possibly also with sizing. This prevents contamination of the position-variable means and possibly the slideways in which they move, with molding material or with components of the molding material binder, if necessary also with sizing.

The formation of the elastically deformable element substantially determines the bulges caused by the position-variable mechanical means, such as the plungers, in a first advanced position. These bulges are formed with suitable design of the elastically deformable element largely independent of the shape of a plunger as well pourable spherical bulge. Edges, which tend to break off especially in sand cores or sand casting molds, are avoided. The aforementioned design of the elastically deformable element relates to the dimensions of the elastically deformable element, in particular the dimensions of the bottom of the blind holes and of course the elastic properties of the elastically deformable element.

The invention will be further explained with reference to an embodiment of an apparatus for producing a pourable mark on a sand core or on a sand mold. The accompanying drawings show in

1 FIG. 2: the plan view of the surface of a sand core or of the casting cavity of a sand casting mold surface of a device with a matrix code, in FIG

2 : a section through a device (schematically), in

3 : a section through another device (schematically), in

4 FIG. 3 is a 3-D representation of the surface of a sand core or casting cavity of a sand mold defining surface of a device having a matrix code and FIG

5 : a section through another device (schematic).

1 shows the top view of the the surface 1 a sand core or the casting cavity of a sand mold defining surface of a device with a matrix code of 6 rows and 6 columns with a total of 36 position-variable mechanical means in the form of arranged in accordance with the matrix shown channels 2 in a basic body 3 reciprocating pestles 4 , From the floating pestles 4 are 23 positioned in a first advanced position while 13 are positioned in a second retracted position. 2 shows a section through the device described above along the section line AA. In a basic body 3 are channels 2 incorporated, in which ram 4 are arranged movable back and forth. The pestles 4 are with a system 5 operatively connected to the generation and transmission of a force, in such a way that each plunger 4 individually reciprocated and in two positions, a first advanced position 6 and a second retracted position 7 , can be positioned. Opposite to the system 5 for generating and transmitting a force is on the body 3 an elastically deformable element 8th arranged. For holding and fixing the elastically deformable element 8th this engages in a circumferential groove 9 at the base body 3 one. In elastically deformable element 8th are in the body 3 facing surface blind holes 10 corresponding to the channels 2 in the main body 3 arranged in which the pestles 4 engage, both in the first advanced position 6 as well as in the second withdrawn position 7 ,

In the first advanced position 6 pushes a pestle 4 against the bottom of the blind hole 10 and deforms it in such a way that at the base body 3 opposite surface 1 the elastically deformable element 8th a bulge 11 is trained. In the second retracted position 7 lies the pestle 4 only at the bottom of the blind hole 10 without, however, the elastically deformable element 8th is deformed. The body 3 opposite surface 1 remains in the effective range of one in the second retracted position 7 positioned ram 4 undeformed, ie even.

For the intended use of the device for producing a pourable marking this is so arranged in a mold for producing a sand core or the mold cavity of a sand mold depicting model, form element or Sandformkastens that the surface 1 the elastically deformable element 8th forms a part of the surface of the mold for producing a sand core or the model, mold element or sand mold box, which determines the surface of the sand core or the mold cavity of the sand mold.

3 shows the section of another embodiment of a device for producing a pourable mark on a sand core or on a sand mold. The elastically deformable element 8th is formed in this embodiment of the device significantly wider and for holding and fixing with the body 3 bonded. The blind holes 10 in the elastically deformable element 5 are formed correspondingly deeper.

4 illustrates in a three-dimensional representation of the surface 1 the elastically deformable element 8th with bulges 11 , The bulges 11 have a spherical shape. Edges are largely avoided.

Finally shows 5 the section of another embodiment of a device for producing a pourable mark on a sand core or on a sand mold, wherein in this embodiment, the plunger 4 can be positioned in three positions. These are a first advanced position 6 , a second withdrawn position 7 and an intermediate position 12 , The front sides of the ram 4 are each with a coupling element 13 coupled to the bottom of a blind hole.

The elastically deformable element 8th is formed in this embodiment of the device so that in the undeformed state respectively corresponding to the location of a blind hole 10 or to the bottom of a blind hole in the surface 1 a recess 14 is trained. Will be a pestle 4 in the first advanced position 6 positioned, becomes the elastically deformable element 8th in the effective range of this ram 4 or in the area of this blind hole 10 as far as deformed, that in the surface 1 a bulge 11 is trained. Will be a pestle 4 in the second retracted position 7 positioned, the elastically deformable element remains 8th in the effective range of this ram 4 or in the area of this blind hole 10 undeformed, leaving in the surface 1 a recess 14 remains. Will be a pestle 4 in the intermediate position 12 positioned, becomes the elastically deformable element 8th in the effective range of this ram 4 or in the area of this blind hole 10 so far deformed that the surface 1 is just.

LIST OF REFERENCE NUMBERS

1

surface

2

channel

3

body

4

tappet

5

System for generating and transmitting a force

6

first advanced position (a plunger 4 )

7

second retracted position (of a plunger 4 )

8th

elastically deformable element

9

groove

10

blind

11

upheaval

12

Intermediate position (of a pestle 4 )

13

coupling element

14

recess

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 19958123 C2 [0003]
• DE 19925674 B4 [0004]

Cited non-patent literature

• Oliver Fehr describes in "PTS - item tracking in the foundry" (Foundry 94 (2007), No. 7, pages 78-82) [0006]
• Article "Fine traces in the sand: Judge engraving systems label low-priced sand cores in foundries" (http://www.werkzeugforum.de/Feine_Spuren_im_Sand_Richter-Gravieranlagen_beschriften_preiswert_Sandkerne_in.4392.98.html) [0006]

Claims (8)

Device for producing a pourable markings on a core or on a casting mold for the casting of a cast part, comprising at least a) a plurality of positionally variable mechanical means ( 4 ) which are arranged at a defined location of the core-imaging mold or of the mold cavity of the mold-imaging model, mold element or mold box so that in the manufacture of the core or the mold pourable bulges ( 11 ) or recesses ( 14 ) are formed in a surface of the casting or casting mold which determines the surface of the casting during the casting process, the entirety of the mechanical means being variable in position ( 4 ) formed bulges ( 11 ) or recesses ( 14 ) represent a marking code, b) one in the direction of the surface of the core or the surface of the casting mold in front of the pourable bulges ( 11 ) or recesses ( 14 ) forming position variable mechanical means ( 4 ) angeodnetes elastically deformable element ( 8th ), c) a system ( 5 ) for generating and transmitting a positioning force for positioning the position-variable mechanical means ( 4 ) and d) with the system ( 5 ) connected to generate a force control system for setting the marking code. Device according to Claim 1, characterized in that the position-variable mechanical means ( 4 ) as within a body ( 3 ) between at least two positions ( 6 . 7 . 12 ) movable plungers ( 4 ) formed by the system ( 5 ) for generating and transmitting a restoring force between the at least two positions ( 6 . 7 . 12 ) are reciprocable and at least in one position ( 6 . 7 ) Bulges ( 11 ) or recesses ( 14 ) in the surface ( 1 ) of the elastically deformable element ( 8th ), which determines the surface of the core or the surface of the casting cavity of the mold. Apparatus according to claim 1 or 2, characterized in that the elastically deformable element ( 8th ) as blind holes ( 10 ) has formed inlet openings corresponding to the the plunger ( 4 ) leading channels ( 2 ) of the basic body ( 3 ) are arranged and the plunger ( 4 ) at least in one position ( 6 ) engage in the inlet openings and that the bottom of the blind holes ( 10 ) through the plungers ( 4 ) is elastically deformable. Device according to claim 3, characterized in that the plungers ( 4 ) in all positions ( 6 . 7 . 12 ) of their reciprocating motion at least partially into the blind holes ( 10 ) intervene. Apparatus according to claim 3 or 4, characterized in that the bottom of the blind holes ( 10 ) im not by the plungers ( 4 ) deformed state is even and the blind holes ( 10 ) facing away from the surface ( 1 ) of the elastically deformable element ( 8th ), which determines the surface of the core or the surface of the casting cavity of the mold, is also flat. Apparatus according to claim 3 or 4, characterized in that the blind holes ( 10 ) facing away from the surface ( 1 ) of the elastically deformable element ( 8th ) im not by the plungers ( 4 ) deformed state in the area of one, several or all blind holes ( 10 ) each corresponding to a blind hole ( 10 ) is convex so that the surface ( 1 ) of the elastically deformable element ( 8th ), which determines the surface of the core or the surface of the casting cavity of the mold, corresponding to the bathing of a blind hole ( 10 ) a recess ( 14 ) trains. Device according to claims 3 to 6, characterized in that between the plunger ( 4 ) and the bottom of the blind hole ( 10 ) a coupling element ( 13 ) is arranged. Apparatus according to claim 6 or 7, characterized in that each plunger ( 4 ) in three positions ( 6 . 7 . 12 ) is positionable, wherein in a first advanced position ( 6 ) the plunger ( 4 ) the bottom of a blind hole ( 10 ) so elastically deformed that the surface ( 1 ) of the elastically deformable element ( 8th ), which determines the surface of the core or the surface of the casting cavity of the casting mold corresponding to the bottom of a blind hole (US Pat. 10 ) concave, d. h outwardly (11) is, in a second retracted position ( 7 ) convex, ie inwardly arched ( 14 ), and in a third position ( 12 ) is just.

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