Composite core capable of being used for squeeze casting and die casting

Abstract

The utility model discloses a composite core capable of being used for squeeze casting and pressure casting, which is formed by combining an inner core and a sand core layer and is used for squeeze casting and pressure casting, so that the core does not need to be preheated, and the sand core layer is easy to scatter, so that the cast core is easy to take out.

Description

TECHNICAL FIELD

[0001] The utility model relates to a core field, specifically a composite core for extrusion casting and die casting. BACKGROUND

[0002] As Figure 1 The top view of the structural casting with several weight-reducing cavities is shown, A represents the solid wall thickness between the two cavities, Figure 2 is a side view, when extrusion casting or pressure casting is needed, the current technology is the same Figure 3 The metal core shown, Figure 4 is the top view of the metal core 3, in use, the metal core must be preheated, and after casting is completed, the metal core is sent out by the core pulling mechanism, when the number of cavities is large, sometimes up to a dozen or even hundreds, the mechanism will be very complex, and when the size of the casting is large (such as more than 1 meter), the distance between the cores needs to be changed to adapt to the shrinkage of the casting, the core pulling mechanism cannot be installed and cannot be implemented. INVENTION CONTENTS

[0003] In order to solve the above problems, the utility model provides a composite core for extrusion casting and die casting, which can effectively solve the deficiencies in the prior art.

[0004] The utility model is realized through the following technical schemes: a composite core for extrusion casting and die casting is composed of an inner core and a heat-insulating sand coating layer, the inner core has an upper plane inner core, the upper plane is mounted on a core positioning plate, and the heat-insulating sand coating layer is coated on the inner core between the inner core and the casting metal liquid.

[0005] As a preferred technical scheme, the inner core has a screw hole, and the screw hole is perpendicular to the upper plane.

[0006] As a preferred technical scheme, the inner core is a hollow structure, and the contact surface of the core positioning plate is a hollow structure.

[0007] As a preferred technical scheme, the inner core is a hollow structure with an upper plate.

[0008] As a preferred technical scheme, the inner core is composed of a hollow inner core and a top plate.

[0009] As a preferred technical scheme, the heat-insulating sand coating layer is a coated sand or a resin sand.

[0010] The utility model has the beneficial effects that the inner core and the sand core layer are combined into a composite core, which is used for extrusion casting and pressure casting, can make the core preheating-free, and the sand core layer is easy to collapse, so that the core is easy to take out after casting is completed. DRAWING DESCRIPTION

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0012] Figure 1 Typical casting plan view of the present application;

[0013] Figure 2 Typical casting side view of the present application;

[0014] Figure 3 Core side view of the present application;

[0015] Figure 4 Core plan view of the present application;

[0016] Figure 5 Composite core side view of the present application;

[0017] Figure 6 Inner hollow composite core side view of the present application;

[0018] Figure 7 Inner hollow composite core plan view of the present application;

[0019] Figure 8 Inner hollow composite core with self top plate side view of the present application;

[0020] Figure 9 Inner hollow composite core with upper flat plate side view of the present application;

[0021] Figure 10 Multi-core combination schematic diagram of the present application;

[0022] Figure 11 Multi-core combination schematic diagram with self top plate of the present application;

[0023] Figure 12 Extrusion casting schematic diagram of the present application;

[0024] Figure 13 Die casting schematic diagram of the present application;

[0025] As the figure mark description:

[0026] 1, typical casting; 2, casting weight reduction cavity; 3, metal core; 4, heat insulation sand coating layer; 5, solid inner core; 6, screw hole; 7, hollow inner core; 71, hollow inner core with upper plate; 8, hollow inner core nut; 9, hollow inner core with self-top plate; 91, screw hole; 10, self-top plate; 11, core positioning plate; 12, squeeze casting lower mold; 13, squeezed metal liquid; 14, pressure casting lower mold; 15, pressure casting metal liquid delivery pipe. DETAILED DESCRIPTION

[0027] All of the features disclosed in this specification, and / or all of the steps of any method or process specified in this specification, can be combined in any combination, except combinations where at least some of such features and / or steps are mutually exclusive.

[0028] Any of the features described herein (including any accompanying claims, abstract and drawings) can be replaced by alternative features that are equivalent in purpose or function unless there are specific statements to the contrary. That is, unless specifically stated to the contrary, any feature is merely an example of one of a number of equivalent or similar features.

[0029] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "central", "end", "length", "outer end" and the like are based on the orientations or positional relationships shown in the drawings, and are merely for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0030] In addition, in the description of the present application, "a plurality of" means at least two, for example, two, three, etc., unless specifically limited otherwise.

[0031] The terms indicating spatial relative positions used in the present application, such as "upper", "upper side", "lower", "lower side" and the like, are used for the purpose of description to describe the relationship of one unit or feature relative to another unit or feature as shown in the drawings. The terms indicating spatial relative positions can be intended to include different orientations of the device in use or operation other than the orientation shown in the drawings. For example, if the device in the drawing is turned over, the unit described as being "below" or "under" the other unit or feature will be "above" the other unit or feature. Therefore, the exemplary term "below" can encompass both the upper and lower positions. The device can be oriented in other ways (rotated 90 degrees or other orientations), and the spatially related descriptions used herein can be interpreted accordingly.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "set," "socket," "connect," "through," and "plug-in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Example 1

[0034] like Figure 5 As shown, it consists of a solid inner core 5 and a heat-insulating sand covering layer 4. The solid inner core 5 has screw holes 6, and the heat-insulating sand covering layer 4 is located between the solid inner core 5 and the molten casting. Figure 10 This is a schematic diagram of the combination of several composite cores and core positioning plates 12. Figure 12 This is a schematic diagram for use in squeeze casting. Several composite cores are mounted on the core positioning plate 11. The inner cavity of the squeeze casting lower die 12 contains the molten metal 13 to be squeezed. When the molten metal 13 enters the squeeze casting lower die 12, the core positioning plate 11, along with the composite cores, moves downward and is squeezed. After squeezing, each composite core remains in the casting. The completed casting is removed from the squeeze machine, and the inner core 5 is pulled out of the casting using screws installed in the screw holes 6. Figure 5 The heat-insulating sand coating layer 4 can be a resin sand structure or a coated sand. The solid inner core 5 in the figure can be combined and bonded with the pre-formed resin sand or coated sand, or the solid inner core 5 can be placed in the resin sand or coated sand molding mold for direct composite molding.

[0035] Example 2

[0036] like Figure 13 As shown, unlike the embodiment, the core positioning plate 11 and the lower die 14 used for pressure casting are locked, and the molten metal is forced into the mold cavity through the pressure casting molten metal inlet pipe 15 by the pressure mechanism.

[0037] Example 3

[0038] Unlike Embodiments 1 and 2, as shown in the example Figure 6 and Figure 7 As shown, the solid inner core 5 is replaced by a hollow inner core 7, and the hollow inner core 7 has a hollow inner core nut 8 for positioning, and the composite core is pulled out after casting.

[0039] Example 4

[0040] Different from the above embodiment, the hollow core 7 is replaced by a hollow core from the top plate 9, which has a screw hole 91 on the top and a self-top plate 10 on the bottom.

[0041] Embodiment 5

[0042] Different from the above embodiment, the core structure is as shown in Figure 9 the hollow core from the top plate 71 is used to replace the hollow core 7.

[0043] The beneficial effect of the utility model is: adopt the core and the sand core layer combination to become the compound core, is used in extrusion casting and pressure casting, can make the core exempt from preheating, and the sand core layer is easy to collapse, makes the core easy to take out after casting.

[0044] The above is only a specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any change or replacement not through the creative labor is thought, should be covered in the protection scope of the utility model, therefore, the protection scope of the utility model should be the protection scope limited by the patent claim book.

Claims

1. A composite core that can be used for squeeze casting and die casting, mounted on a core positioning plate, characterized in that: It consists of an inner core and a heat-insulating sand covering layer. The inner core has an upper surface, which is mounted on the core positioning plate. The heat-insulating sand covering layer covers the inner core between the inner core and the molten casting metal.

2. The composite core for use in squeeze casting and die casting according to claim 1, characterized in that: There are screw holes on the inner core, and the screw holes are perpendicular to the upper plane.

3. The composite core that can be used for squeeze casting and die casting according to claim 1, characterized in that: The inner core is a hollow structure and the contact surface of the core positioning plate is also hollow.

4. The composite core that can be used for squeeze casting and die casting according to claim 1, characterized in that: The inner core is a hollow structure with a flat plate.

5. The composite core for use in squeeze casting and die casting according to claim 1, characterized in that: The inner core consists of a hollow inner core and a top plate.

6. The composite core for use in squeeze casting and die casting according to claim 1, characterized in that: The heat-insulating sand coating layer is either coated sand or resin sand.

Images