DE112019003687B4 - Device for the production of sand cores - Google Patents

Abstract

An apparatus for producing sand cores, the apparatus comprising:a box body (100) having a cavity (104) configured for sand dumping;a plurality of supports (200), adjacent supports (200) being in close abutment and being independently disposed, and each of said plurality of supports (200) being configured to move to a predetermined position in said cavity (104) under the action of an external force to form a structural shape conforming to a predetermined sand core/sand core blank; and a driving device (300) capable of driving the pillars (200) to move so that each of the free ends (205) of the pillars (200) are movable to a predetermined position within the box body (100),thereby characterized in that the drive device (300) comprises a plurality of drive arms (301) and a limit seat (302);in that the box body (100) comprises at least one side wall (101) and a bottom plate (102) fixedly connected to the at least one side wall (101) stands, and the supports (200) are able to penetrate the at least one side wall (101) and/or the bottom plate (102) and close to the hole wall of the penetration hole (103) on the at least one corresponding side wall ( 101) and bottom plate (102), respectively, wherein a support (200) and a drive arm (301) are configured such that the support (200) and drive arm (301) rotate relative to each other while still linearly axially b moving, and the drive arm (301) and the restriction seat (302) are configured so that they only rotate relative to each other; orwherein a support (200) and a drive arm (301) are configured to rotate only relative to each other, and the drive arm (301) and the constraint seat (302) are configured such that the drive arm (301) and the constraint seat ( 302) rotate relative to each other while still moving linearly in the axial direction.

Description

technical field

The present disclosure relates to the technical field of casting, and more particularly to an apparatus and method for manufacturing sand cores.

Technical background

Mandrels are indispensable in casting technology, and are important components for the formation of a casting structure. There are many types of material compositions for mandrels, with sand cores made from mandrels being the most commonly used in the prior art and having advantages such as low cost and easy manufacture .

Sand cores are mainly applied to the formation of internal holes and internal voids of castings. A sand core is fixed at a predetermined position inside a sand mold and then cast; and after the casting is completed, the sand core is encased in the casting, and the sand core is then broken, thereby forming a cavity portion in the casting.

Traditional sand core making requires the use of core boxes (wooden mold, metal mold, etc.). Therefore, before the production of sand cores, a core box adapted to the shape of the sand core must be prepared. However, with respect to the manufacture of core boxes, a core box is only suitable for the manufacture of sand cores of only one structural shape; if sand cores of different structural shapes are to be manufactured, core boxes shall be re-manufactured with corresponding structural shapes; besides, the production is also restricted by comparatively longer production period of core boxes and requires high costs. Therefore, conventional sand core manufacturing is suitable for mass production of sand cores, and unsuitable for rapid small-batch production of single sand cores.

DE 10 2004 006 772 B4 discloses an electric screwing tool with a hexagon socket, the inside of which is filled with pins 11 . CN 1 02 773 421 A discloses a digital extrusion molding machine comprising a molding machine support, an extrusion molding table and a press platen,

subject of the application

It is an object of the present disclosure to provide a sand core manufacturing apparatus and method to facilitate rapid sand core manufacturing according to different needs of sand core structures.

In order to solve at least one of the above problems, the present disclosure is mainly implemented using the following technical solution.

• einen Kastenkörper mit einem zur Sandschüttung konfigurierten Hohlraum; und
• mindestens eine Stütze, wobei mehrere Stützen vorhanden sind, benachbarte Stützen dicht aneinander anliegen und unabhängig voneinander angeordnet sind, und die mindestens eine Stütze derart konfiguriert wird, dass sie sich unter der Wirkung einer äußeren Kraft zu einer vorgegebenen Position in dem Hohlraum bewegt, um eine an einen vorgegebenen Sandkern/Sandkernrohling angepasste strukturelle Form zu bilden.

This disclosure provides an apparatus for making sand cores, comprising:

• a box body having a cavity configured for sand dumping; and
• at least one pillar, where there are plural pillars, adjacent pillars are closely adjacent and arranged independently of one another, and the at least one pillar is configured to move under the action of an external force to a predetermined position in the cavity to a structural shape conforming to a given sand core/blank sand core.

Optionally, the at least one support has a prism structure.

Optionally, the at least one support is an N-sided prism, where N is an integer from 3-20.

Optionally, the box body includes at least one side wall and a bottom plate that is in fixed connection with the at least one side wall, and the at least one support is able to penetrate the at least one side wall and/or the bottom plate and close to the hole wall of the penetration hole abut against the at least one corresponding side wall or base plate.

Optionally, it is further comprised of a driving device capable of driving the at least one support to move such that a free end of the support is movable to a predetermined position within the box body.

Optionally, an end of the post opposite the free end thereof has a blind hole and is fixedly provided with a nut, the blind hole and the nut being both coaxial or parallel to the post;
The drive device includes a drive arm and a limiter seat, the drive arm has a rod-shaped structure arranged coaxially or parallel to the support, one end of the drive arm is screwed to the nut while another end serves as a power input end, and the drive arm is able to protrude into the blind hole; the restriction seat is arranged outside of the box body and is fixedly arranged relative to the box body; and the restriction seat is provided with a through hole through which the drive arm passes and through which the restriction seat is pivotally connected to the drive arm;
Optionally, the nut is embedded in the blind hole.

Optionally, an end of the support opposite to the free end thereof is provided with a threaded hole arranged coaxially or parallel to the support;
The driving device includes a driving arm and a limit seat, wherein the driving arm has a rod-shaped structure arranged coaxially or parallel to the bracket, one end of the driving arm is screwed to the threaded hole of the bracket, while another end serves as a power input end; the restriction seat is arranged outside of the box body and is fixedly arranged relative to the box body; and the restriction seat is provided with a through hole through which the drive arm passes and through which the restriction seat is pivotally connected to the drive arm.

Optionally, an end of the support opposite the free end thereof is provided with a blind hole located coaxially or parallel to the support;

The drive device includes a drive arm and a limit seat, the drive arm having a rod-shaped structure arranged coaxially or parallel to the bracket, one end of the drive arm pivotally connected to the blind hole of the bracket, while another end of the drive arm serves as a power input end; the restriction seat is arranged outside of the box body and is fixedly arranged relative to the box body; and the restriction seat is provided with a threaded hole through which the drive arm passes and through which the restriction seat is screwed to the drive arm.

Optionally, the restriction seat has a plate-like structure.

Optionally, the drive device further includes a drive motor, wherein an output shaft of the drive motor is connected to the power end of the drive arm to drive the drive arm to rotate.

Preferably, a restriction protrusion is formed on the outward extension of the output shaft of the drive motor along the radial direction thereof, and the power input end of the drive arm is provided with a restriction groove fitted with the restriction protrusion.

Optionally, the drive motor is mounted on a motor installation device capable of powering the drive motor to move along a predetermined path.

There is only one drive motor; alternatively, there are several drive motors, and one of the drive motors is associated with several of the at least one supports (200); alternatively, there are multiple drive motors, and multiple drive motors correspond one-to-one to the multiple supports.

Optionally, the motor installation device is an electric cylinder.

• Herstellen eines Sandkernrohlings, wobei eine obige Vorrichtung zur Herstellung von Sandkernen verwendet wird, mindestens eine entsprechende Stütze bis zu einer vorgegebenen Position innerhalb des Hohlraums des Kastenkörpers hineingeragt ist, und dann Formsand in den Hohlraum des Kastenkörpers eingefüllt wird, wodurch ein Sandkernrohling hergestellt wird;
• Verfestigen des Sandkernrohlings, und dann Herausnehmen des Sandkernrohlings; und
• Weiterverarbeiten des Sandkernrohlings, wodurch ein erwünschter Sandkern erhalten wird.

The present disclosure further provides a method for manufacturing sand cores, comprising the following steps:

• preparing a green sand core using a sand core making apparatus as above, protruding at least one respective post to a predetermined position within the cavity of the box body, and then filling sand into the cavity of the box body, thereby preparing a green sand core;
• solidifying the green sand core, and then taking out the green sand core; and
• Further processing the sand core blank, whereby a desired sand core is obtained.

Optionally, the sand filling is realized by sandblasting in the step for producing sand core blanks.

In the sand core blank manufacturing step, the molding sand filled in the cavity of the box body is optionally self-hardening sand.

In the step for further processing of sand core blanks, an NC machine is optionally used for further processing of the sand core blank.

Optionally, the NC machine is at least one of cutting machine, lathe, milling machine and grinding machine.

It is to be explained that the term "coaxial arrangement" in this disclosure does not mean a theoretically absolute "coaxial arrangement" because in practical operation there are usually deviations if two components are "coaxially arranged with each other", while for the person skilled in the art it is " coaxial arrangement" as long as these deviations are within a permissible deviation range and appropriate solutions and functions can be implemented.

Also, the term "parallel arrangement" in this disclosure does not mean a theoretically absolute "parallel arrangement", and it is to be referred to as "parallel arrangement" for the person skilled in the art as long as the parallel deviation of both components is within an allowable deviation range and corresponding solutions and functions can be realized.

• Um Ausdrücke zu vereinfachen und das Verständnis zu erleichtern, wird in dem in dieser Offenbarung aufgezeichneten Inhalt ein Sandkernprodukt mit Bearbeitungszugabe als „Sandkernrohling“ bezeichnet, und der fertig bearbeitete Sandkern wird als „Sandkern“ bezeichnet.

Beneficial effects include:

• In order to simplify expressions and facilitate understanding, in the content recorded in this disclosure, a machining allowance sand core product is referred to as “sand core blank”, and the finished sand core is referred to as “sand core”.

Using this sand core manufacturing apparatus or method, an applied force is applied to a plurality of supports depending on the specific structural shape of a sand core/sand core blank, thereby driving corresponding support to move to the predetermined position in the cavity of the box body, so that a plurality of supports together form a shape conforming to the sand core/sand core blank; then sand is filled into the cavity of the box body; and finally a sand core/sand core blank with a predetermined structural shape is obtained. Compared with existing sand core manufacturing apparatuses (e.g., core box), in the sand core manufacturing apparatus according to an embodiment of this disclosure, the replacement of the box body is unnecessary, and the manufacture of a core box is also unnecessary, instead it is only necessary to To control movement of the support depending on the characteristics of the structural shape of a sand core/sand core blank so that respective supports together form a design space fitted to the sand core blank, then a corresponding sand core/sand core blank can be obtained. If a finished sand core is directly manufactured using the sand core manufacturing apparatus according to this disclosure, further processing of the sand core by another method is no longer necessary; if a finished sand core cannot be directly manufactured using the sand core manufacturing apparatus according to this disclosure, but only a sand core blank with a certain machining allowance is manufactured, the manufacture of a finished sand core can be realized quickly and accurately by subsequently using a comparatively proven Further processing methods (such as turning, cutting, grinding) are used.

character list

• 1 zeigt eine perspektivische schematische Strukturdarstellung einer Vorrichtung zur Herstellung von Sandkernen nach einer Ausführungsform dieser Offenbarung;
• 2 zeigt eine schematische Schnittansicht der Vorrichtung zur Herstellung von Sandkernen nach einer Ausführungsform dieser Offenbarung, wobei sich jede Stütze im jeweils entsprechenden ersten Positionszustand befindet;
• 3 zeigt eine schematische Schnittansicht der Vorrichtung zur Herstellung von Sandkernen nach einer Ausführungsform dieser Offenbarung, wobei sich jede Stütze im jeweils entsprechenden zweiten Positionszustand befindet;
• 4 zeigt eine schematische Strukturdarstellung eines Kastenkörpers der Vorrichtung zur Herstellung von Sandkernen nach einer Ausführungsform dieser Offenbarung, wobei die linke Seite der Mittellinie eine schematische Schnittansicht des Kastenkörpers darstellt, und die rechte Seite eine Umrissansicht des Kastenkörpers darstellt;
• 5 zeigt eine schematische Strukturdarstellung eines Antriebsarms ersten Typs in der Vorrichtung zur Herstellung von Sandkernen nach einer Ausführungsform dieser Offenbarung;
• 6 zeigt eine schematische strukturelle Schnittansicht einer Stütze ersten Typs in der Vorrichtung zur Herstellung von Sandkernen nach einer Ausführungsform dieser Offenbarung, wobei die Stütze dieses Typs in zusammenwirkender Verbindung mit einem Antriebsarm ersten Typs steht;
• 7 zeigt eine schematische strukturelle Schnittansicht einer Stütze zweiten Typs in der Vorrichtung zur Herstellung von Sandkernen nach einer Ausführungsform dieser Offenbarung, wobei die Stütze dieses Typs in zusammenwirkender Verbindung mit einem Antriebsarm ersten Typs steht;
• 8 zeigt eine schematische strukturelle Schnittansicht einer Stütze dritten Typs in der Vorrichtung zur Herstellung von Sandkernen nach einer Ausführungsform dieser Offenbarung, wobei die Stütze dieses Typs in zusammenwirkender Verbindung mit einem Antriebsarm ersten Typs steht;
• 9 ist eine perspektivische schematische Explosions- und Strukturdarstellung, die die Verbindungsstruktur zwischen einem Antriebsarm ersten Typs und einem Antriebsmotor in der Vorrichtung zur Herstellung von Sandkernen nach einer Ausführungsform dieser Offenbarung zeigt;
• 10 ist eine schematische Strukturdarstellung, die eine Teilschnittansicht der Vorrichtung zur Herstellung von Sandkernen nach einer Ausführungsform dieser Offenbarung zeigt, wobei der erste Positionszustand einer der Stützen auf der Basis eines Antriebsarms ersten Typs und einer Stütze ersten Typs gezeigt wird;
• 11 ist eine schematische Strukturdarstellung, die eine Teilschnittansicht der Vorrichtung zur Herstellung von Sandkernen nach einer Ausführungsform dieser Offenbarung zeigt, wobei der zweite Positionszustand der in 10 gezeigten Stütze auf der Basis eines Antriebsarms ersten Typs und einer Stütze ersten Typs gezeigt wird;
• 12 ist eine schematische Strukturdarstellung, die eine Teilschnittansicht der Vorrichtung zur Herstellung von Sandkernen nach einer Ausführungsform dieser Offenbarung zeigt, wobei der erste Positionszustand einer der Stützen auf der Basis eines Antriebsarms ersten Typs und einer Stütze zweiten Typs gezeigt wird;
• 13 ist eine schematische Strukturdarstellung, die eine Teilschnittansicht der Vorrichtung zur Herstellung von Sandkernen nach einer Ausführungsform dieser Offenbarung zeigt, wobei der zweite Positionszustand der in 12 gezeigten Stütze auf der Basis eines Antriebsarms ersten Typs und einer Stütze zweiten Typs gezeigt wird;
• 14 zeigt eine schematische Strukturdarstellung eines Antriebsarms zweiten Typs in der Vorrichtung zur Herstellung von Sandkernen nach einer Ausführungsform dieser Offenbarung;
• 15 zeigt eine schematische strukturelle Schnittansicht einer Stütze vierten Typs in der Vorrichtung zur Herstellung von Sandkernen nach einer Ausführungsform dieser Offenbarung, wobei die Stütze dieses Typs in zusammenwirkender Verbindung mit einem Antriebsarm zweiten Typs steht;
• 16 zeigt eine schematische strukturelle Schnittansicht einer Stütze fünften Typs in der Vorrichtung zur Herstellung von Sandkernen nach einer Ausführungsform dieser Offenbarung, wobei die Stütze dieses Typs in zusammenwirkender Verbindung mit einem Antriebsarm zweiten Typs steht;
• 17 ist eine schematische Strukturdarstellung, die eine Teilschnittansicht der Vorrichtung zur Herstellung von Sandkernen nach einer Ausführungsform dieser Offenbarung zeigt, wobei der erste Positionszustand einer der Stützen auf der Basis eines Antriebsarms zweiten Typs und einer Stütze vierten Typs gezeigt wird;
• 18 ist eine schematische Strukturdarstellung, die eine Teilschnittansicht der Vorrichtung zur Herstellung von Sandkernen nach einer Ausführungsform dieser Offenbarung zeigt, wobei der zweite Positionszustand der in 17 gezeigten Stütze auf der Basis eines Antriebsarms zweiten Typs und einer Stütze vierten Typs gezeigt wird;
• 19 zeigt eine schematische Darstellung einer Struktur zur Nachbearbeitung eines Sandkernrohlings in einem Verfahren zur Herstellung von Sandkernen nach einer Ausführungsform dieser Offenbarung; und
• 20 zeigt ein Ablaufdiagramm des Verfahrens zur Herstellung von Sandkernen nach einer Ausführungsform dieser Offenbarung.

In order to more clearly describe technical solutions of the embodiments of the present disclosure, drawings necessary for the embodiments are briefly introduced below; and it is to be understood that the following drawings show only some embodiments of this disclosure and therefore should not be construed as limitations on the scope of protection of this disclosure, and other related drawings may be obtainable by those skilled in the art from these drawings without the use of the inventive faculty.

• 1 12 is a perspective schematic structural view of an apparatus for manufacturing sand cores according to an embodiment of this disclosure;
• 2 Fig. 12 is a schematic sectional view of the sand core manufacturing apparatus according to an embodiment of this disclosure, with each post being in the respective first position state;
• 3 Fig. 12 is a schematic sectional view of the sand core manufacturing apparatus according to an embodiment of this disclosure, with each post being in the respective second position state;
• 4 12 is a schematic structural diagram of a box body of the sand core manufacturing apparatus according to an embodiment of this disclosure, wherein the left side of the center line shows a schematic sectional view of the box body, and the right side shows an outline view of the box body;
• 5 12 is a schematic structural diagram of a first-type driving arm in the sand core manufacturing apparatus according to an embodiment of this disclosure;
• 6 Fig. 12 is a schematic structural sectional view of a first-type support in the sand core manufacturing apparatus according to an embodiment of this disclosure tion, the support of this type being in cooperative connection with a drive arm of the first type;
• 7 Fig. 12 is a schematic structural sectional view of a second-type support in the sand core manufacturing apparatus according to an embodiment of this disclosure, the support of this type being in cooperative connection with a first-type drive arm;
• 8th Fig. 12 is a schematic structural sectional view of a third type support in the sand core manufacturing apparatus according to an embodiment of this disclosure, the support of this type being in cooperative connection with a first type driving arm;
• 9 12 is an exploded perspective and structural schematic diagram showing the connection structure between a first-type drive arm and a drive motor in the sand core manufacturing apparatus according to an embodiment of this disclosure;
• 10 12 is a schematic structural diagram showing a partial sectional view of the sand core manufacturing apparatus according to an embodiment of this disclosure, showing the first positional state of one of the first-type drive arm-based supports and the first-type support;
• 11 12 is a schematic structural diagram showing a partial sectional view of the sand core manufacturing apparatus according to an embodiment of this disclosure, wherein the second position state is the same as in FIG 10 shown bracket based on a first type drive arm and a first type bracket;
• 12 12 is a schematic structural diagram showing a partial sectional view of the sand core manufacturing apparatus according to an embodiment of this disclosure, showing the first positional state of one of the supports based on a first-type driving arm and a second-type support;
• 13 12 is a schematic structural diagram showing a partial sectional view of the sand core manufacturing apparatus according to an embodiment of this disclosure, wherein the second position state is the same as in FIG 12 shown bracket is shown based on a first type drive arm and a second type bracket;
• 14 12 is a schematic structural diagram of a second-type driving arm in the sand core manufacturing apparatus according to an embodiment of this disclosure;
• 15 Fig. 12 is a schematic structural sectional view of a fourth type support in the sand core manufacturing apparatus according to an embodiment of this disclosure, the support of this type being in cooperative connection with a second type driving arm;
• 16 Fig. 12 is a schematic structural sectional view of a fifth type support in the sand core manufacturing apparatus according to an embodiment of this disclosure, the support of this type being in cooperative connection with a second type driving arm;
• 17 12 is a schematic structural diagram showing a partial sectional view of the apparatus for manufacturing sand cores according to an embodiment of this disclosure, showing the first positional state of one of the second-type driving arm-based supports and a fourth-type support;
• 18 12 is a schematic structural diagram showing a partial sectional view of the sand core manufacturing apparatus according to an embodiment of this disclosure, wherein the second position state is the same as in FIG 17 shown bracket is shown based on a second type drive arm and a fourth type bracket;
• 19 12 is a schematic representation of a structure for post-processing a sand core blank in a sand core manufacturing method according to an embodiment of this disclosure; and
• 20 FIG. 12 shows a flow chart of the method for manufacturing sand cores according to an embodiment of this disclosure.

References:

100

box body;

101

Side wall;

102

bottom plate;

103

penetration hole;

104

Cavity;

200

Support;

201

first blind hole;

202

Mother;

203

Prop Screw Hole;

204

second blind hole;

205

free end;

206

connection end;

300

drive device;

301

drive arm;

302

limit seat;

303

drive motor;

3011

screw section;

3012

optical intercept;

3013

limiting groove;

3031

limiting protrusion;

400

clamping devices;

500

NC machine;

600

sand core blank.

Detailed description of the embodiments

In order to make the objects, the technical solutions and the advantages of the embodiments of the present disclosure clearer, technical solutions in the embodiments of this disclosure are to be described clearly and comprehensively in the following with reference to the drawings of the embodiments of this disclosure, and the described embodiments are obvious only partial embodiments, rather than all of the embodiments of this disclosure. In general, the assemblies, components, or parts of the embodiments of this disclosure, described and illustrated in the drawings herein, can be arranged and configured in a number of different configurations.

Therefore, the following detailed description of the embodiments of this disclosure provided in the drawings is intended to represent only partial embodiments of this disclosure rather than to limit the scope of the disclosure. All other embodiments that would be obtainable by those skilled in the art based on the embodiments in this disclosure without the use of an inventive faculty fall within the scope of the disclosure.

It should be noted that similar signs and letters in the following drawings refer to similar items and therefore an item need not be further defined and explained in subsequent drawings once the item has been defined in a drawing.

In the explanation of this disclosure, it is to be explained that orientational or positional relationships indicated by terms such as "above" and "inside" are orientational or positional relationships shown based on the drawings, or orientational or positional relationships in which a product is conventionally placed in this disclosure, and the terms are used only for convenience in explaining the disclosure and for convenience of explanation, rather than implying or implying that the mentioned device or element should have a specific orientation and should be constructed and operated in a specific orientation , and therefore should not be construed as limitations on the scope of the disclosure.

Furthermore, terms such as "first" and "second" are for purposes of distinct explanation only, and are not to be construed as implying or implying any importance in relativity.

In the explanation of this disclosure, it is to be further explained that terms such as "arrangement" and "connection" should be understood in a broad sense, unless otherwise expressly stated and defined. For example, a "connection" could be either a fixed connection, or a detachable connection, or an integral connection; it could be either a mechanical connection, or an electrical connection; and it might be either a direct connection, or an indirect connection through an intermediate link, or an internal communication between two elements. For those skilled in the art, the specific meanings of the above terms in this disclosure could be understood according to specific circumstances.

Hereinafter, partial embodiments of this disclosure are to be described with reference to the drawings, and the features in the following embodiments can be combined with each other without contradiction.

..like it in 1-18 As shown, the present embodiment provides a sand core manufacturing apparatus, and for this sand core manufacturing apparatus, manufacturing of sand core blanks fitted to sand cores is exemplified. while showing 1 FIG. 12 is a perspective schematic structural view of the sand core manufacturing apparatus according to this embodiment, the sand core manufacturing apparatus including a box body 100 and a support 200. FIG. 4 FIG. 12 shows a schematic structural representation of the box body 100, which has a cavity 104 configured for sand filling. How it in 1-3 As shown, there are multiple posts 200, adjacent posts 200 are close to each other and arranged independently of each other, and the post 200 is configured to move to a predetermined position in the cavity 104 under the action of an external force to to form a structural shape conforming to a sand core blank.

When using this sand core manufacturing apparatus, an acting force is applied to a plurality of supports 200 depending on the structural shape of a sand core blank, thereby driving corresponding support 200 to move to the predetermined position in the cavity 104 of the box body 100, so that a plurality of supports 200 together form one forming the sand core blank into a customized shape; then sand is filled in the cavity 104 of the box body 100; and finally a green sand core having a predetermined structural shape is obtained. In comparison with existing sand core manufacturing apparatuses (e.g., core box), in the sand core manufacturing apparatus according to this embodiment of the disclosure, the replacement of the box body 100 is unnecessary, and the manufacture of a core box is also unnecessary, instead it is only required to control the movement of the support 200 according to characteristics of the structural shape of a sand core so that respective plural supports 200 collectively form a design space adapted to the sand core blank, then rapid manufacturing targeting sand cores of different structural shapes can be further realized.

In the prior art, to quickly manufacture sand cores, it is also possible to manufacture sand cores by 3D printing, however, while manufacturing sand cores in this way, the processing is realized layer by layer, therefore the manufacturing efficiency is comparatively low and the sand core quality is also difficult to ensure ; furthermore, complex 3D printing equipment is required, i.e. the initial investment is enormous. In contrast, in the sand core manufacturing apparatus according to this embodiment of the disclosure, it is only necessary to control the movement of a plurality of supports 200 to a predetermined position within the cavity 104 of the box body 100, and to charge molding sand to form a sand core blank, and then one to produce the desired sand core quickly and efficiently using a proven machining process (turning, cutting, grinding, etc.). On the other hand, in the apparatus for manufacturing sand cores in this embodiment, the supports 200 and the box body 100 have a wide range of materials compared to manufacturing sand cores by 3D printing, and have comparatively lower requirements for manufacturing processes, and the starting manufacturing cost thereof is significantly lower .

In this embodiment, the support 200 has a variety of structures, for example, the support 200 can have a prism structure; it is also possible that the support 200 can have a cylindrical structure or other prismatic structure with a regular or irregular cross-section, processing the support 200 into the prism of a regular shape requires lower costs. For example, support 200 can be processed into the N-squared prism, where N is an integer from 3 to 20; for example, it could be a triangular, quadrangular, pentagonal, or hexagonal, etc., and as in 1 shown, a quadrangular prism is given as an example to describe the support 200 .

In the above content, the structure of the bracket 200 is described as an example, and in the following, the structure of the box body 100 is described as an example. like it in 1-4 As shown, in one embodiment of this disclosure, the box body 100 includes a side wall 101 and a bottom panel 102, wherein the side wall 101 and the bottom panel 102 are fixedly connected, and the support 200 is able to penetrate the side wall 101 and tightly abutting against the hole wall of the penetrating hole of the side wall 101 (not shown in the figures) to prevent the molding sand from leaking out of the box body 100; alternatively, the stay 200 may penetrate the bottom plate 102 and closely abut the hole wall of the penetration hole 103 in the bottom plate 102 to prevent the molding sand from leaking out of the box body; alternatively, a plurality of supports 200 are respectively provided on the side wall 101 and the bottom plate 102, the side wall 101 penetrating supports 200 each closely abut the hole wall of the penetrating hole on the side wall 101, and the bottom plate 102 penetrating supports 200 each closely fit the hole wall of the penetrating hole 103 of the bottom plate 102, so as to prevent the molding sand in the box body from leaking out of the box body 100 accordingly. During the manufacture of sand cores: if the sand core to be manufactured has a simple structure, the structure of the sand core blank is also correspondingly simple, it being enough to provide a corresponding support 200 on the side wall 101 or on the bottom plate 102; on the contrary, if the sand core to be manufactured has a comparatively more complicated structure, the structure of the corresponding blank sand core may also be more complicated, and in this case, corresponding supports 200 may be attached to the side wall 101 and 101, respectively the bottom plate 102 may be provided. In order to simplify the description, this embodiment is exemplified in which the box body 100 is provided only with a penetrating hole 103 in the bottom plate 102 for penetrating the bracket 200 as shown in FIG 4 will be shown; although the arrangement of a penetration hole in the side wall 101 is not shown in the figure, it also falls within the scope of this disclosure.

The box body 100 in this disclosure further includes a box lid (not shown in the figures), and a plurality of supports may be selectively provided on the box lid, the plurality of supports on the box lid being independently movable to predetermined positions in the cavity 104 of the box body 100, respectively to form a structural shape conforming to a sand core blank; the pillars on the box lid can still cooperate with corresponding pillars on the side wall or with corresponding pillars on the bottom plate to form a comparatively complex structural shape and thereby accommodate structurally complex sand core blanks; and the pillars on the box lid can still cooperate with corresponding pillars on the sidewall and with corresponding pillars on the bottom plate to form a more complex structural shape and thereby accommodate structurally complex sand core blanks. Although these solutions are not shown in the figures, they are still within the scope of this disclosure.

In the above content, the box body 100 is described by way of example, and in the following the power source for driving the movement of the stay 200 is described by way of example. During the manufacture of blank sand cores by means of the apparatus for manufacturing sand cores according to this embodiment, a corresponding support 200 is driven under the action of an external force according to the structural shape of the blank sand core to move to a predetermined position in the cavity 104 of the box body 100, where this external force is obtainable either manually or by arranging a driving device 300 for driving the movement of the support 200, as in FIG 1-3 1, ie the driving device 300 drives the support 200 such that a free end of the support 200 (see definition below for detailed contents) is movable to a predetermined position in the cavity 104 of the box body 100.

At this time, the driving device 300 drives the bracket 200 to move to the predetermined position in the cavity 104 of the box body 100, and this can be realized in various ways, respective ways differing from the structure of the driving device 300 and the way of connection between the bracket 200 and the drive device 300 or structural characteristics at the connection point; and in the following, the structure of the driving device 300 and the structure of the support 200 corresponding to the driving device 300 are to be described further by way of example.

Optionally, in the first way, the end of the support 200 that is located in the cavity 104 of the box body 100 during operation is defined as the free end 205, as in FIG 6 and the end of the support 200 opposite the free end 205 is defined as the connecting end 206, which has a blind hole and is fixedly provided with a nut 202, the blind hole in the support 200 being defined as the first blind hole 201, and the first blind hole 201 and the nut 202 are both arranged coaxially with the bracket 200. Here it is to be explained that arranging the axis of the first blind hole 201 parallel to the length direction of the support 200 can also realize corresponding functions because the support 200 does not rotate, that is, the solution in which the axis of the first blind hole 201 parallel to the length direction of the support 200 also falls within the scope of this disclosure. The drive device 300, which corresponds to the structure of this support 200, comprises a drive arm 301 and a limit seat 302, as in FIG 1-3 shown. As in 1 , 2 , 3 , and 5, the drive arm 301 is a rod-shaped structure, and the drive arm 301 is arranged coaxially with the bracket 200; and here it is to be explained that the parallel arrangement of the drive arm 301 to the support 200 also falls within the scope of this disclosure. As in 2 , 3 , 9 , 10 , and 11 shown, one end of drive arm 301 (threaded portion 3011 as in 5 shown) is screwed to the connection end 206 of the support 200, here by means of the nut 202, while the other end of the drive arm 301 serves as the power input end, and the drive arm 301 can protrude into the first blind hole 201. like it in 1-3 As shown, the restriction seat 302 is disposed outside the box body 100 and is fixedly disposed relative to the box body 100; and the restriction seat 302 is provided with a through hole through which the drive arm 301 passes and through which the restriction seat 302 is pivotally connected to the drive arm 301. More specifically, the other end of the driving arm 301 is provided with an optical axis section 3012 as shown in FIG 5 1, and the drive arm 301 is rotatably connected to the through hole of the restricting seat 302 via the optical axis portion 3012, ie, pivotally connected.

In this way, the drive arm 301 is a rod-shaped structure, for example, the drive arm 301 is a lead screw structure as shown in FIG 1-3 , 5 , and 9 1, and one end of the drive arm 301 is a worm structure while the other end is an optical axis structure; and the nut 202 as well as the support 200 may be considered as a one-piece structure, and as in 2 , 3 , 6 , 10 , and 11 shown, the nut 202 is firmly embedded in the first blind hole 201 . The optical axis (i.e., optical axis portion 3012) of the driving arm 301 is pivotally connected to the through hole of the constraint seat 2, that is, the optical axis can rotate in the through hole of the constraint seat 302, and the rotation of the two relative to each other can be realized in various ways, for example, relative rotation between the two can be realized directly by axial constraint and loose fit, and relative rotation between the two can also be realized by placing a bearing between the optical axis and the through hole. The worm of the drive arm 301 is screwed to the nut 202 of the bracket 200, and if the bracket 200 is a prism, adjacent brackets 200 each restrict the rotation of the other, and the bracket 200 and nut 202 move synchronously, correspondingly rotates the Drive arm 301 under the action of an external force relative to the limit seat 302. In this case, the nut 202 linearly moves along the direction of the axis of rotation of the drive arm 301 while still rotating relative to the drive arm 301, thereby driving the support 200, itself linearly along the direction of the rotation axis of the drive arm 301 until the free end 205 of the bracket 200 moves to a predetermined position in the cavity 104 of the box body 100. Then, after all the concerned supports 200 are respectively moved into position, sand can be filled into the cavity 104 of the box body 100 and the molding process of blank sand cores can be performed, thereby obtaining a corresponding blank sand core. In short, the relationship between the support 200 and the drive arm 301 in this way is as follows: the support 200 and the drive arm 301 rotate relative to each other while still linearly moving relative to the axial direction; and the relationship between the drive arm 301 and the restriction seat 302 is as follows: there is only relative rotation between the drive arm 301 and the restriction seat 302, thereby converting between the in 10 and 11 shown two states is realized, then the process for the production of sand core blanks is completed.

In this way, the nut 202 can be fixed to the support 200 in other ways besides being embedded in the first blind hole 201, e.g. by welding, clamping, etc., and the nut 202 can still be fixedly provided at one end of the support 200. and such a configuration also falls within the scope of this disclosure.

Optionally, in a second way, the end of the support 200 which, during operation, is located in the cavity 104 of the box body 100 is also defined as a free end 205, as in FIG 1-4 , 5 , 7 , 12 , and 13 and the end of the bracket 200 opposite the free end 205 is defined as the connecting end 206 which is provided with a threaded hole, the threaded hole being defined as the bracket screw hole 203, and the bracket screw hole 203 being coaxial with the bracket 200 ; besides, they could also be arranged parallel to each other, and the reasons for this are similar to that in the first way, so repeated description is omitted here. The driving device 300 corresponding to the structure of this bracket 200 includes a driving arm 301 and a restriction seat 302. The driving arm 301 is a rod-shaped structure, and the driving arm 301 is arranged coaxially with the bracket 200, or the driving arm 301 is parallel to the bracket 200 arranged. One end of the drive arm 301 (threaded portion 3011) is screwed to the bracket screw hole 203 of the bracket 200 therein, while the other end serves as a power input end. The restriction seat 302 is arranged outside of the box body 100 and is fixedly arranged relative to the box body 100; and the restriction seat 302 is provided with a through hole through which the drive arm 301 passes and through which the restriction seat 302 is pivotally connected to the drive arm 301.

In this way, the drive arm 301 is a rod-shaped structure, for example, the drive arm 301 is a lead screw structure, and one end of the drive arm 301 is a worm structure while the other end is an optical axis structure. The optical axis of the drive arm 301 is pivotally connected to the limiter seat 302, ie the optical axis can rotate in the through hole of the limiter seat 302, and as described in the first manner above, a bearing may be interposed between the optical axis and the through hole. The worm of the driving arm 301 is screwed to the pillar screw hole 203, and if the pillar 200 is a prism, adjacent pillars 200 each restrict the rotation of the other, ie the pillars do not rotate and accordingly the driving arm 301 rotates under the action an external force relative to the restriction seat 302, thereby driving the bracket 200 to move linearly along the direction of the rotation axis of the driver sarms 301 until the free end 205 of the bracket 200 moves to a predetermined position in the cavity 104 of the box body 100. Then, after all the concerned supports 200 are respectively moved into position, sand can be filled into the cavity 104 of the box body 100 and the molding process of blank sand cores can be performed, thereby obtaining a corresponding blank sand core. In this way, the relationship between the support 200 and the drive arm 301 is as follows: the support 200 and the drive arm 301 rotate relative to each other while still linearly moving relative to the axial direction; and the relationship between the drive arm 301 and the restriction seat 302 is as follows: there is only relative rotation between the drive arm 301 and the restriction seat 302, thereby converting between the in 12 and 13 shown two states is realized, then the process for the production of sand core blanks is completed.

For this way, the support 200 can also be used like that in 8th Structure shown can be configured, that is, a pillar screw hole 203 and a blind hole 201 are sequentially provided at the connection end 206 of the pillar 200, and the pillar screw hole 203 realizes the same function as the nut 202 in the above first way, this implementation way will also limited within the scope of this disclosure.

Optionally, in a third way, the end of the support 200 that is in use in the cavity 104 of the box body 100 is also defined as a free end 205, as in FIG 1-4 and 14-18 shown, and the end of the support 200 opposite the free end 205 is defined as the connecting end 206, which is provided with a blind hole, the blind hole being defined here as a second blind hole 204, and the second blind hole 204 being arranged coaxially with the support 200, or the second blind hole 204 is arranged in parallel with the bracket 200, and the reasons for such arrangements are the same as those in the above two ways, therefore repeated description is omitted here. The driving device 300 corresponding to the structure of this bracket 200 includes a driving arm 301 and a restriction seat 302. The driving arm 301 is a rod-shaped structure, and the driving arm 301 is arranged coaxially with the bracket 200, or the driving arm 301 is parallel to the bracket 200 arranged. One end of the drive arm 301 (optical axis section 3012 as in Fig 14 shown) is pivotally connected to the second blind hole 204 of the bracket 200, while the other end of the drive arm 301 serves as a power input end. The restriction seat 302 is arranged outside of the box body 100 and is fixedly arranged relative to the box body 100; and the limiter seat 302 is provided with a threaded hole, the drive arm 301 passes through the threaded hole, that is, the threaded portion 3011 of the limiter seat 302 is matched to the threaded hole and screwed thereto, in other words, the limiter seat 302 is through this threaded hole with the drive arm 301 screwed.

In this way, the drive arm 301 is a rod-shaped structure as shown in FIG 14 As shown, the drive arm 301 is a lead screw structure, and one end of the drive arm 301 is a worm structure while the other end is an optical axis structure. The optical axis of the drive arm 301 is pivotable with the second blind hole 204 (as in 15 and 16 shown) of the support 200, ie the optical axis can rotate in the second blind hole 204, as in FIG 17 and 18 shown, the rotation can be realized by arranging a bearing between the optical axis and the through hole. The worm of the drive arm 301 is screwed to the threaded hole of the restriction seat 302, and if the support 200 is a prism, adjacent supports 200 each restrict the rotation of the other, that is, the supports 200 do not rotate, and accordingly the drive arm 301 rotates under the Effect of an external force relative to the limit seat 302 and at the same time moves linearly along the direction of the axis of rotation of the drive arm 301, thereby driving the support 200 to move linearly along the direction of the axis of rotation of the drive arm 301 until the free end 205 of the support 200 is moved to a predetermined position in the cavity 104 of the box body 100. Then, after all the concerned supports 200 are respectively moved into position, sand can be filled into the cavity 104 of the box body 100 and the molding process of blank sand cores can be performed, thereby obtaining a corresponding blank sand core. In this way, the relationship between the support 200 and the drive arm 301 is as follows: between the support 200 and the drive arm 301 there is only rotation relative to each other; and the relationship between the drive arm 301 and the restriction seat 302 is as follows: the drive arm 301 and the restriction seat 302 rotate relative to each other while still linearly moving in the axial direction, thereby converting between the in 17 and 18 shown two states is realized, then the process for the production of sand core blanks is completed.

Besides the above three ways, similar solutions or variants based on any of the above three ways of implementation all limited within the scope of this disclosure.

Furthermore, the structure of the above restriction seat 302 is available in a variety of structural forms, for example, the restriction seat 302 is configured as a plate-shaped structure, and then a corresponding through hole or threaded hole is provided on the restriction hole 302 . In addition, the restriction seat 302 can still be configured in other specially shaped structures as long as the function of the restriction seat 302 can be realized, and therefore no limitation is made here.

Next, the power source for driving the movement of the above drive arm 301 will be described as an example. In the above driving device 300, one end of the driving arm 301 serves as a power input end, and this power can be acquired either manually or by mechanical automation. As in 9 1, the driving device 300 further includes a driving motor 303. In order to simplify the structure of the apparatus for manufacturing sand cores, the example with a single driving motor 303 is given in this embodiment in order to clarify the positional and connecting relationships between the driving motor 303 and the corresponding driving arm 301 be illustrated. Referring further to 9 , the output shaft of the drive motor 303 is connected to the power input end of the drive arm 301 to drive the drive arm 301 to rotate; and such a configuration enables automated operations, saves manpower, and realizes precise trajectory control of the driving arm 301, thereby controlling the trajectory of the support 200 accurately.

Optionally, the connection between the driving motor 303 and the driving arm 301 can be realized in various forms, for example, a limiting projection 3031 is formed on the extension of the output shaft of the driving motor 303 along the radial direction thereof to the outside, and the power supply end of the driving arm 301 is provided with a limiting groove 3013 , which is fitted to the limiting projection 3031. Such a configuration allows the limiting projection 3031 of the output shaft of the driving motor 303 to be inserted or snapped into the limiting groove 3013 at the power input end of the driving arm 301, and accordingly realizes synchronous rotation of the two, i.e. it is realized that the driving motor 303 controls the driving arm 301 to rotate drives. In addition, the restriction projection 3031 may also be provided at the power input end of the drive arm 301 while the restriction groove 3013 is arranged at the output shaft of the drive motor 303, the working principle of which is the same as the above, and hence repeated description is omitted here.

The way of installing the drive motor 303 will be described below. The drive motor 303 may be mounted on a motor installation device capable of powering the drive motor to move along a predetermined path. For example, the drive motor 303 is mounted on an electric cylinder (not shown in the figures), and the electric cylinder drives the drive motor 303 to move along a predetermined path.

• Optional gibt es auf erste Weise nur ein Antriebsmotor 303, der Antriebsmotor 303 wird von einem elektrischen Zylinder angetrieben, entlang einer vorgegebenen Bewegungsbahn zur Position, wo sich entsprechende Stütze 200 befindet, zu bewegen, und die Zapfenwelle davon wird mit dem Krafteinspeisungsende des Antriebsarms 301 verbunden, wodurch das freie Ende 205 der entsprechenden Stütze 200 angetrieben wird, sich bis zur vorgegebenen Position in dem Hohlraum 104 des Kastenkörpers 100 zu bewegen. Beispielsweise können mehrere Stützen 200 nummeriert werden, und die Stützen 200 werden nacheinander von dem elektrischen Zylinder zum Bewegen angetrieben. Dieser Antriebsmotor 303 wird als D gezeichnet, und entsprechende mehrere Stützen 200 werden jeweils als D₁, D₂, D₃ ... gezeichnet; und der elektrische Zylinder treibt den Antriebsmotor 303 nach vorgegebenem Bedarf zum Bewegen bis zur Position, wo sich die entsprechende Stütze 200 befindet, an, und treibt denselben zum Betrieb an, und dann treibt der Antriebsmotor 303 wiederum die entsprechende Stütze 200 zum Bewegen an.

The following ways can be applied to the arrangement of the drive motor 303:

• Optionally, in the first way, there is only one drive motor 303, the drive motor 303 is driven by an electric cylinder to move along a predetermined trajectory to the position where corresponding support 200 is located, and the pivot shaft thereof is connected to the power input end of the drive arm 301 , whereby the free end 205 of the corresponding support 200 is driven to move to the predetermined position in the cavity 104 of the box body 100. For example, multiple supports 200 can be numbered, and the supports 200 are sequentially driven to move by the electric cylinder. This drive motor 303 is drawn as D, and corresponding multiple supports 200 are drawn as D ₁ , D ₂ , D ₃ ... respectively; and the electric cylinder drives the driving motor 303 to move up to the position where the corresponding support 200 is located according to predetermined needs and drives the same to operate, and then the driving motor 303 again drives the corresponding support 200 to move.

In a second way, optionally there are a plurality of drive motors 303 and one or more supports 200 is associated with one of the drive motors 303 . For example, the plurality of driving motors 303 are drawn as A, B, C..., respectively, and the plurality of supports 200 are drawn as A ₁ , A ₂ , A ₃ ..., B ₁ , B ₂ , B ₃ ..., respectively, and C ₁ , C ₂ , C ₃ ... where the drive motor A corresponds to support A ₁ , support A ₂ , support A ₃ ..., the drive motor B corresponds to support B ₁ , support B ₂ , support B ₃ . , and the drive motor C corresponds to pillar C ₁ , pillar C ₂ , pillar C ₃ ... and so on. The electric cylinder drives the corresponding drive motor 303 according to the predetermined required to operate, and then the drive motor 303 in turn drives the corresponding supports 200 to move.

Thirdly, optionally, there are a plurality of drive motors 303 corresponding to the plurality of supports 200 one-to-one. For example, the plurality of drive motors 303 are each drawn as A, B, C..., and the plurality of supports 200 are each drawn as A ₁ , B ₁ , C ₁ ..., where drive motor A corresponds to support A ₁ , the drive motor B corresponds to prop B ₁ , and the drive motor C corresponds to prop C ₁ , and so on. The electric cylinder drives the corresponding drive motor 303 to operate according to predetermined needs, and the drive motor 303 in turn drives the corresponding support 200 to move.

• Herstellen eines Sandkernrohlings, wobei eine obige Vorrichtung zur Herstellung von Sandkernen verwendet wird, eine entsprechende Stütze bis zu einer vorgegebenen Position innerhalb des Hohlraums des Kastenkörpers hineingeragt ist, und dann Formsand in den Hohlraum des Kastenkörpers eingefüllt wird, wodurch ein Sandkernrohling hergestellt wird;
• Verfestigen des Sandkernrohlings, und dann Herausnehmen des Sandkernrohlings; und
• Weiterverarbeiten des Sandkernrohlings, wodurch ein erwünschter Sandkern erhalten wird.

An embodiment of this disclosure further provides a method of making sand cores, and as described in 20 shown, the procedure includes the following steps:

• preparing a green sand core using a sand core making apparatus as above, protruding a corresponding post to a predetermined position within the cavity of the box body, and then filling sand into the cavity of the box body, thereby preparing a green sand core;
• solidifying the green sand core, and then taking out the green sand core; and
• Further processing the sand core blank, whereby a desired sand core is obtained.

In this case, the sand filling in the step for producing sand core blanks can be realized by sandblasting; Of course, other types of sand filling could also be used, which is not to be limited here;
In the blank sand core manufacturing step, the molding sand filled in the cavity of the box body is self-hardening sand; in addition, molding sand of another type can be filled as long as a desired sand core can be molded, and therefore no limitation is made here;
In the sand core blank finishing step, an NC machine is used to further process the sand core blank, and as in 19 1, a sand core blank 600 is attached to a corresponding NC machine 500 using a fixture 400; for example, the NC machine 500 may be at least one of a cutter, a lathe, a milling machine, and a grinder.

Commercial Applicability

By the sand core manufacturing apparatus and method provided in this disclosure, rapid manufacturing targeting sand cores of various structural shapes can be realized, and advantages such as high efficiency, high adaptability, low cost, and high popularizability can also be achieved.

Claims (13)

An apparatus for producing sand cores, the apparatus comprising: a box body (100) having a cavity (104) configured for sand dumping; a plurality of pillars (200), wherein adjacent pillars (200) are closely abutted and arranged independently of each other, and wherein each of the plurality of pillars (200) is configured to move to a predetermined position in the cavity under the action of an external force (104) moved to form a structural shape conforming to a given sand core/blank sand core; and a drive device (300) capable of driving the supports (200) to move so that each of the free ends (205) of the supports (200) are movable to a predetermined position within the box body (100), characterized in that the driving device (300) comprises a plurality of driving arms (301) and a restriction seat (302); that the box body (100) comprises at least one side wall (101) and a bottom plate (102) which is in fixed connection with the at least one side wall (101), and the supports (200) are able to support the at least one side wall ( 101) and/or the bottom plate (102) and to lie tightly against the hole wall of the penetration hole (103) on the at least one corresponding side wall (101) or bottom plate (102), with a support (200) and a drive arm (301 ) are configured so that the support (200) and the drive arm (301) rotate relative to each other while still moving linearly in the axial direction, and the drive arm (301) and the limit seat (302) are configured so that they rotate only relative to each other; or wherein a support (200) and a drive arm (301) are configured to only rotate relative to each other, and the drive arm (301) and the constraint seat (302) are configured so that the drive arm (301) and the constraint seat (302) rotate relative to each other while still moving linearly in the axial direction. Device for the production of sand cores claim 1 , characterized in that the at least one support (200) has a prismatic structure. Device for the production of sand cores claim 2 , characterized in that the at least one support (200) is an N-pointed prism, where N is an integer from 3 to 20. Device for the production of sand cores claim 1 , characterized in that an end of the support (200) opposite the free end (205) thereof has a blind hole and is fixedly provided with a nut (202), the blind hole and the nut (202) both being coaxial or parallel are arranged to the support (200); the drive device (300) comprises a drive arm (301) and a limit seat (302), the drive arm (301) having a rod-shaped structure arranged coaxially or parallel to the support (200), one end of the drive arm (301) having the nut (202) is screwed while another end serves as a power input end, and the drive arm (301) is able to protrude into the blind hole; the restriction seat (302) is located outside of the box body (100) and is fixed relative to the box body (100); and the restriction seat (302) is provided with a through hole through which the drive arm (301) passes and through which the restriction seat (302) is pivotally connected to the drive arm (301). Device for the production of sand cores claim 4 , characterized in that the nut (202) is embedded in the blind hole. Device for the production of sand cores claim 1 , characterized in that an end of the support (200) opposite to the free end (205) thereof is provided with a threaded hole arranged coaxially or parallel to the support (200); the drive device (300) comprises a drive arm (301) and a limit seat (302), the drive arm (301) having a rod-shaped structure arranged coaxially or parallel to the support (200), one end of the drive arm (301) having screwed into the threaded hole of the bracket (200) while another end serves as a power input end; the restriction seat (302) is located outside of the box body (100) and is fixed relative to the box body (100); and the restriction seat (302) is provided with a through hole through which the drive arm (301) passes and through which the restriction seat (302) is pivotally connected to the drive arm (301). Device for the production of sand cores claim 1 , characterized in that an end of the support (200) opposite to the free end (205) thereof is provided with a blind hole arranged coaxially or parallel to the support (200); the drive device (300) comprises a drive arm (301) and a limit seat (302), the drive arm (301) having a rod-shaped structure arranged coaxially or parallel to the support (200), one end of the drive arm (301) pivotable connected to the blind hole of the bracket (200) while another end of the drive arm (301) serves as a power input end; the restriction seat (302) is located outside of the box body (100) and is fixed relative to the box body (100); and the restriction seat (302) is provided with a threaded hole through which the drive arm (301) passes and through which the restriction seat (302) is screwed to the drive arm (301). Device for the production of sand cores according to one of Claims 4 - 7 , characterized in that the restriction seat (302) has a plate-like structure. Device for the production of sand cores according to one of Claims 4 - 7 , characterized in that the drive device (300) further comprises a drive motor (303), wherein an output shaft of the drive motor (303) is connected to the power input end of the drive arm (301) to drive the drive arm (301) to rotate. Device for the production of sand cores claim 9 , characterized in that a restriction projection (3031) is formed on the extension of the output shaft of the drive motor (303) along the radial direction thereof outward, and the power supply end of the drive arm (301) is provided with a restriction groove (3013) which is fitted to the restriction projection ( 3031) is adjusted. Device for the production of sand cores claim 9 , characterized in that the drive motor (303) is mounted on a motor installation device capable of driving the drive motor to move along a predetermined path. Device for the production of sand cores claim 11 , characterized in that the motor installation device is an electric cylinder. Device for the production of sand cores according to one of claims 9 - 12 , thereby identified indicates that there is only one drive motor (303); alternatively, there are a plurality of drive motors (303) and one of the drive motors (303) is assigned a plurality of the at least one supports (200); alternatively, a plurality of drive motors (303) are present and correspond one-to-one to the plurality of supports (200).

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