CN113680994A

CN113680994A - Mold for preparing hierarchical gradient foamed aluminum

Info

Publication number: CN113680994A
Application number: CN202110853110.2A
Authority: CN
Inventors: 江鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2021-11-23

Abstract

The invention provides a die for preparing hierarchical gradient foamed aluminum, which comprises a steel die body, wherein a forming groove and an induction heating coil are arranged on the steel die body, the induction heating coil surrounds the outside of the steel die body, the induction heating coil is not connected with the left part and the right part of the steel die body and works independently, and an electrically controlled ceramic fiber baffle is arranged between the left part and the right part of the steel die body and can be used for electrically controlling the opening and the closing of the ceramic fiber baffle. The left steel die body is used for forming a low-density foamed aluminum plate, the right steel die body is used for forming a high-density foamed aluminum plate, and the foamed aluminum plates with different densities in the left steel die body and the right steel die body are subjected to combined extrusion forming and hierarchical gradient foamed aluminum plates. The mould can control the temperature of the mould body, has high heating efficiency and is easy to form foamed aluminum plates with different density gradients.

Description

Mold for preparing hierarchical gradient foamed aluminum

Technical Field

The invention relates to the technical field of foamed aluminum production equipment, in particular to a mold for preparing hierarchical gradient foamed aluminum.

Background

The foamed aluminum is a multifunctional material with high porosity, has the composite characteristics of light weight, high strength and toughness, crashworthiness, high specific strength, high specific rigidity, flame retardance, heat insulation, vibration and noise reduction, corrosion resistance and electromagnetic shielding, and is widely applied to the fields of electronics, communication, metallurgy, chemical industry, construction, transportation, aerospace and the like.

The gradient foamed aluminum is a foamed aluminum structure with continuously changed density, pore size and components in a certain dimension direction of the foamed aluminum, overcomes the defects of the traditional homogeneous foamed aluminum material, and can use a low porosity area as a bearing and a high porosity area to realize functional characteristics.

At present, the preparation methods of the gradient foamed aluminum have defects, a press is needed to prepare a blank in the preparation processes of the seepage casting method and the occupying body sintering method, the external dimension of the prepared gradient foamed aluminum is limited by the tonnage and the table size of the press, and a water dissolving container which is matched with the press is needed to be specially equipped, so that the operation is complex, the dies are various, and the cost is high. In the process of the friction stir processing method, a large amount of friction stir processes are needed, which comprise foaming agent dispersion and connection between blanks with different characteristics, and high-temperature device treatment is needed, so that the problems of low processing efficiency and high cost exist.

Disclosure of Invention

The embodiment of the invention provides a mould for preparing hierarchical gradient foamed aluminum, which is used for preparing precisely-controllable foamed aluminum plates with different hierarchical gradients; the invention can control the temperature of the die body, has high heating efficiency, is easy to quickly form the foamed aluminum plates with different levels of gradients, and has the advantages of high efficiency, low cost and high performance.

In one aspect of the present invention, there is provided a mold for preparing a graded gradient foamed aluminum, comprising: the steel die body is a regular convex polyhedron and comprises a first end face, a second end face, a third end face, a fourth end face, a fifth end face, a sixth end face, a seventh end face, an eighth end face and a first bottom face, the first end surface has the same height as the second end surface, the third end surface, the fourth end surface, the fifth end surface, the sixth end surface, the seventh end surface and the eighth end surface, the first end surface, the third end surface and the fourth end surface are positioned at the bulge of the steel die body, the sum of the shortest width of the first end surface, the width of the fifth end surface and the width of the sixth end surface is the same as the width of the second end surface, the width of the seventh end surface is the same as the width of the eighth end surface, the width of the third end surface is the same as the width of the fourth end surface, the longest width of the first bottom surface is the same as the sum of the length of the third end surface and the length of the seventh end surface.

The outer surface of the steel die body is provided with a protective surface, the first inductance coil and the second inductance coil are respectively positioned between the first bottom surface of the steel die body and the interlayer of the protective surface, a baffle which is as wide as the shortest width of the first end surface, as high as the first end surface and as long as the widest length of the first bottom surface is arranged between the first end surface of the steel die body and the second end surface, and the baffle is as long as the third end surface and the fourth end surface.

And the fifth end surface or the sixth end surface is provided with a baffle which moves in parallel along the inner surface of the fifth end surface or the sixth end surface, and the width of the baffle is greater than or equal to the shortest width of the first end surface.

The first inductance coil and the second inductance coil are used for heating foamed aluminum plates with different densities.

According to one embodiment of the invention, the baffle is electrically controlled, and the baffle moves upwards along a fixed shaft perpendicular to the first bottom surface along the third end surface and the fourth end surface.

According to one embodiment of the invention, the baffle is made of ceramic fibers.

According to one embodiment of the invention, the shutter is controlled electrically or manually.

According to one embodiment of the invention, the first and second inductor coils are temperature controlled by different heating control devices.

The invention achieves the following beneficial effects: the first inductance coil and the second inductance coil are controlled by different heating control equipment to control the temperatures of the first inductance coil and the second inductance coil, and the temperatures of the foamed aluminum with different densities to be prepared are effectively and efficiently controlled by heating the first inductance coil or the second inductance coil; meanwhile, the baffle made of ceramic fiber materials is adopted, so that the heating temperature of the foamed aluminum with different densities is controlled more accurately; the preparation of the foamed aluminum plates with different levels of gradients can be effectively and quickly finished by adopting the stop gates, so that the more complete preparation process of the foamed aluminum plates with different levels of gradients is ensured; meanwhile, the heating efficiency is high, the foamed aluminum plates with different levels of gradients are easily and quickly formed, the investment cost is low, and the practical value is very high.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a sectional view of a mold for producing a graded gradient foamed aluminum according to an embodiment of the present invention;

FIG. 2 is a top view of a mold for producing a graded gradient foamed aluminum according to an embodiment of the present invention;

FIG. 3 is a schematic view of a baffle plate upward movement station of a mold for preparing the graded gradient foamed aluminum according to the embodiment of the invention;

FIG. 4 is a schematic diagram of a station where a shutter of a mold for producing a graded gradient foamed aluminum according to an embodiment of the present invention moves to a front end of a first end surface;

fig. 5 is a side view of a mold for making a graded gradient aluminum foam as disclosed in an embodiment of the present invention.

With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

In one aspect of the present invention, there is provided a mold for preparing a graded gradient foamed aluminum, as shown in fig. 1, comprising: the steel mold body 1 is a regular convex polyhedron and comprises a first end face 11, a second end face 12, a third end face 13, a fourth end face 14, a fifth end face 15, a sixth end face 16, a seventh end face 17, an eighth end face 18 and a first bottom face 19, as shown in fig. 2, the first end face 11, the second end face, the third end face 13, the fourth end face 14, the fifth end face 15, the sixth end face 16, the seventh end face 17 and the eighth end face 18 are equal in height, the first end face 11, the third end face 13 and the fourth end face 14 are located at a convex part of the steel mold body 1, the shortest width of the first end face 11 is the same as the width of the fifth end face 15 and the sum of the widths of the sixth end face 16 is the same as the width of the second end face, and the width of the seventh end face 17 is the same as the width of the eighth end face 18, the third end surface 13 and the fourth end surface 14 have the same width, and the longest width of the first bottom surface 19 is the same as the sum of the length of the third end surface 13 and the length of the seventh end surface 17.

The edge the surface of steel die body 1 is equipped with the protection face, first inductance coil 2 with second inductance coil 3 is located first bottom surface 19 respectively with between the intermediate layer of protection face, 1 first terminal surface 11 of steel die body with be equipped with between the second terminal surface with first terminal surface 11 the shortest width is aequilate, with first terminal surface 11 height just with the isometric baffle 5 of 19 widest length in first bottom surface, baffle 5 with third terminal surface 13 with fourth terminal surface 14.

The fifth end surface 15 or the sixth end surface 16 is provided with a shutter 6, the shutter 6 moves in parallel along the inner surface of the fifth end surface 15 or the sixth end surface 16, and the width of the shutter 6 is greater than or equal to the shortest width of the first end surface 11.

The first inductance coil 2 and the second inductance coil 3 are used for heating foamed aluminum plates with different densities. The first inductor winding 2 and said second inductor winding 3 are not connected and can be operated independently. The first inductance coil 2 and the second inductance coil 3 are controlled by different heating control devices to control the temperatures thereof, and can be respectively heated or insulated at different temperatures.

The baffle 5 is electrically controlled, and the baffle 5 moves upwards along a fixed shaft of the third end surface 13 and the fourth end surface 14 and is vertical to the first bottom surface 19. The baffle 5 is made of ceramic fiber. The foamed aluminum plates with different densities are respectively placed in first grooves formed by the first bottom surface 19 on the first inductance coil 2 and the baffle 5, the fifth end surface 15, the seventh end surface 17 and the second end surface, and in second grooves formed by the first bottom surface 19 on the second inductance coil 3 and the baffle 5, the sixth end surface 16, the eighth end surface 18 and the second end surface.

The contact part of the first groove body or the second groove body and the door stopper 6 is provided with a groove, and a micro guide rail is arranged below the groove, so that the door stopper 6 can move horizontally between the fifth end surface 15 and the sixth end surface 16 conveniently.

After a certain time, the baffle 5 can be controlled to move upwards through a preset time or by heating the temperature of the first inductance coil 2 or the second inductance coil 3, and the electrically controlled baffle 6 horizontally moves to the front end of the first end face 11.

The specific operation steps are as follows: firstly, a first groove body surrounded by a first heating inductance coil 2 of a foamed aluminum preparation rapid forming die receives a foamed aluminum solution with low density gradient, the outlet temperature of the foamed aluminum solution is 500 ℃, and then cooling and heat preservation treatment are carried out to keep the foamed aluminum solution in a semi-solid state; secondly, a second groove body surrounded by a second heating inductance coil 3 of the foamed aluminum preparation rapid forming die receives a foamed aluminum solution with high density gradient, and the outlet temperature of the foamed aluminum solution is 500 ℃; finally, as shown in fig. 3, the ceramic fiber baffle 55 is opened by an electric control mode, and then the shutter 66 is closed by rapid electric control, as shown in fig. 4, the temperature and pressure of the foamed aluminum solution in the first tank body and the second tank body are reduced. Fig. 5 is a side view of a mold for making a graded gradient aluminum foam as disclosed in an embodiment of the present invention.

Wherein the temperature processing mode is for cooling to the solidification temperature, and the foamed aluminum solution of high density gradient links together with the semi-solid state of foamed aluminum of low density gradient this moment, forms the foamed aluminum plate of two different density gradients promptly, and wherein foamed aluminum plate's specific density can accurate control, and its specific density depends on the foamed aluminum foaming density of receiving in first cell body, the second cell body, and specific temperature can be adjusted according to the foamed aluminum solution of actual receipt. The above temperatures are merely exemplary temperatures for the present invention.

The invention achieves the following beneficial effects: the first inductance coil 2 and the second inductance coil 3 are controlled by different heating control equipment to control the temperatures of the first inductance coil 2 and the second inductance coil 3, and the temperatures of the foamed aluminum with different densities to be prepared are effectively and efficiently controlled by heating the first inductance coil 2 or the second inductance coil 3; meanwhile, the baffle 5 made of ceramic fiber materials is adopted, so that the heating temperature of the foamed aluminum with different densities is controlled more accurately; the preparation of the foamed aluminum plates with different levels of gradients can be effectively and quickly finished by adopting the stop gates, so that the more complete preparation process of the foamed aluminum plates with different levels of gradients is ensured; meanwhile, the heating efficiency is high, the foamed aluminum plates with different levels of gradients are easily and quickly formed, the investment cost is low, and the practical value is very high.

It should be understood that the above-described embodiments are merely exemplary for illustrating the application of the present method and are not limiting, and that various other modifications and changes may be made by those skilled in the art based on the above description for studying the related problems. Therefore, the protection scope of the present invention should be defined by the appended claims.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present invention, and are not limited thereto; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A mold for producing a graded gradient foamed aluminum, the mold comprising: the steel die body (1) is a regular convex polyhedron and comprises a first end face (11), a second end face (12), a third end face (13), a fourth end face (14), a fifth end face (15), a sixth end face (16), a seventh end face (17), an eighth end face (18) and a first bottom face (19), the first end face (11) is as high as the second end face (12), the third end face (13), the fourth end face (14), the fifth end face (15), the sixth end face (16), the seventh end face (17) and the eighth end face (18), the first end face (11), the third end face (13) and the fourth end face (14) are located at the convex part of the steel die body (1), and the shortest width of the first end face (11) is as high as the width of the fifth end face (15), The sum of the widths of the sixth end face (16) is the same as the width of the second end face (12), the width of the seventh end face (17) is the same as the width of the eighth end face (18), the widths of the third end face (13) and the fourth end face (14) are the same, and the longest width of the first bottom face (19) is the same as the sum of the length of the third end face (13) and the length of the seventh end face (17);

a protective surface (4) is arranged along the outer surface of the steel mold body (1), the first inductance coil (2) and the second inductance coil (3) are respectively positioned between a first bottom surface (19) of the steel mold body (1) and the protective surface (4), and a baffle (5) which is as wide as the shortest width of the first end surface (11), as high as the first end surface (11), and as long as the widest length of the first bottom surface (19) is arranged between the first end surface (11) and the second end surface (12) of the steel mold body (1);

a shutter (6) is arranged on the fifth end surface (15) or the sixth end surface (16), and the shutter (6) moves in parallel along the inner surface of the fifth end surface (15) or the sixth end surface (16).

2. Mould according to claim 1, characterised in that said shutter (5) is electrically controlled, said shutter (5) moving upwards along a fixed axis with respect to said third end surface (13) and said fourth end surface (14), perpendicularly to said first bottom surface (19).

3. The mold of claim 2, wherein: the baffle (5) is made of ceramic fibers.

4. The mold of claim 1, wherein: the gear door (6) is controlled electrically or manually.

5. The mold of claim 1, wherein: the first induction coil (2) and the second induction coil (3) are controlled in temperature by different heating control devices.

6. The mold of claim 1, wherein: the first induction coil (2) and the second induction coil (3) are used for heating foamed aluminum plates with different densities.

7. The mold of claim 1, wherein: the width of the shutter (6) is greater than or equal to the shortest width of the first end surface (11).

8. The mold of claim 1, wherein: the baffle (5) is hinged to the third end face (13) and the fourth end face (14).