KR20100009148A - Aluminum plate moulding machine and of production method of aluminum plate by used therof - Google Patents

Abstract

PURPOSE: An aluminum plate molding device and a manufacturing method of aluminum plates using the same are provided to minimize expense required for molding and reduce product cost by simply and easily molding the aluminum plate. CONSTITUTION: An aluminum plate molding device comprises a lower mold(10), an upper mold(30), an aluminum plate(20), and a cover mold(40). A square core(11) is formed on the upper surface center of the lower mold. The lower mold has a square shape. The aluminum plate covers the core. The upper mold is combined on the upper side of the lower mold. The cover mold is fixed and coupled on the upper side of the upper mold. The lower mold is metal material and the core is formed on the center of the upper surface.

Description

Aluminum plate molding machine and of production method of aluminum plate by used therof}

The present invention relates to an aluminum sheet molding machine and an aluminum sheet manufacturing method for molding an aluminum sheet used for sound absorption or construction, etc. More specifically, the aluminum sheet is modified in the insert injection operation through the injection molding of a thin aluminum sheet The present invention relates to an aluminum sheet molding machine for molding without a mold, and to a method of manufacturing an aluminum sheet using the same.

Grain refinement of metal materials usually depends on three methods.

First, as in the case of low carbon steel, it is quenched at high temperature to refine the particles by inhibiting phase transformation,

The second is to control the growth of the matrix particles by adding impurity elements to the matrix and by the particles produced by the impurity elements,

The third is to make the nucleation site of new particles by deforming the tissue by cold rolling, etc., and to make a lot of particles during the subsequent heat treatment, thereby minimizing the particles.

Among the above-mentioned methods, grain refinement of the aluminum alloy sheet material, in particular, non-heat treatment type aluminum alloy sheet material has been mainly made by a method of recrystallization heat treatment after cold rolling.

However, it has been difficult to manufacture an aluminum alloy sheet having excellent sheet forming properties and high strength with the existing aluminum alloy sheet manufacturing method including a cold rolling step and a recrystallization heat treatment step.

The reason is that the beta-fiber formed in the matrix due to cold rolling grows into large grains of 30 µm or more by recrystallization heat treatment, so that the strength characteristics are very low, and the cube orientation is developed in the recrystallized texture. This is because sheet plastic workability, such as value, is very poor.

Therefore, studies for overcoming the problems of the conventional aluminum alloy annealed sheet material as described above have been made at various angles, and the present inventors have a plate material having excellent strength and formability by controlling the rolling rate of the hot rolling and thus the warm rolling. To manufacture.

Aluminum alloy is a lightweight metal material with excellent mechanical properties and high specific strength (ratio of density to density), and is most widely used as a mechanical and structural material as a nonferrous metal. Generally, solid solution strengthening or precipitation strengthening method by adding substitutional alloy element is used to improve the strength of aluminum alloy, and the solid solution strengthening method is a non-heat treatment type aluminum alloy because no heat treatment is required, and the precipitation strengthening method is solid solution treatment, quenching, It is classified as heat treatment type aluminum alloy because it undergoes heat treatment of aging.

However, such a method of improving the strength by the addition of alloying elements causes a decrease in ductility and toughness as the strength increases, and thus there is a limit to the strength improvement by the addition of alloying elements. In order to make up for such drawbacks, a method of improving strength by refining grains has recently been used.

The strength enhancement method by grain refinement has the advantage of increasing toughness and increasing toughness and not accompanied by a decrease in ductility. Continuous recrystallization and discontinuous recrystallization are widely used as a method for refining grains of aluminum alloys.

Continuous recrystallization is a method of homogenizing and cold working to make microstructure thermally unstable, and then hot working again to refine the crystal grains by using the dynamic recrystallization phenomenon occurring during hot working. Discontinuity crystallization is similar to continuous crystallization, but it is a method to refine grains by using static recrystallization during heat treatment after cold working.

First, these methods are energy-consuming because the plastic processing and heat treatment must be repeated above the critical processing amount to cause recrystallization.

Second, when the non-uniform plastic processing is applied, the recrystallized grain size becomes non-uniform, so that the mechanical properties are not constant according to the material part.

Third, since it is difficult to obtain fine grains of 5 μm or less, and thus the strength increase effect is not large, there is a disadvantage in that additional alloying elements are required to obtain a desired strength.

In order to overcome the shortcomings of the conventional method of increasing the strength through the refinement of the grain size of aluminum alloy through thermal and mechanical treatment, by performing only very severe plastic processing without heat treatment, the microstructure is made into ultra fine grain of 1 μm or less. Have been proposed to dramatically increase the

As a representative method thereof, ECAP (Equal Channel Angular Pressing) method proposed by VM Segal et al., Russian Metallurgy, vol. 1 (1981) p. 99; U.S. Patent No. 5,513,512 ; Severe Torsional Straining (STS) method proposed by R. Z. Valiev et al., DAN SSSR, vol. 301 (4) (1988) p.864; Accumulated Roll Bonding (ARB) method proposed by N. Tsuji et al., Scripta Materialia, vol. 40 (1999) p.795 in Japan.

The ECAP method mechanically ultrafines the microstructure without changing the initial dimension by simple shear deformation generated when the aluminum alloy is repeatedly passed through a die having an 'L' shaped channel having the same area. The method requires special die manufacturing, and can only manufacture rod-shaped shapes, which has disadvantages that cannot be applied to the manufacture of the most widely used plate material in actual structural material form.

The STS method is a method for miniaturizing grains by simultaneously applying a very extreme twist and compressive load to a disk-shaped specimen having a very small diameter, which is also unsuitable for the production of ultra-fine grain large sheet.

The ARB method is to cut the aluminum alloy rolled to 50% reduction rate in the material, and then overlap the same thickness as before rolling, and then repeat the rolling process to give a very extreme deformation to the aluminum alloy, thereby providing a grain without changing the initial dimension It is a method to refine.

Unlike the ECAP method and the STS, the ARB method is a rigid plastic processing method that is suitable for the manufacture of ultra-fine grain plates, but in the process of repeated rolling after forming, 2 n -1 (n: rolling counts) are essentially created inside the material, and thus the complete interface Unless the joining is made, there is a drawback accompanying the deterioration of mechanical properties due to delamination.

The present invention has been invented to solve various defects and problems caused by conventional aluminum plate manufacturing in view of the above situation, the object of which is to insert the resin through injection molding by injecting a resin into a thin soft aluminum plate An aluminum plate molding machine for molding an aluminum plate without deformation, and a method of manufacturing an aluminum plate using the same.

Still another object of the present invention is to provide an aluminum plate forming machine having excellent economical efficiency and a method of manufacturing an aluminum plate using the same, which can reduce the cost of the product by minimizing the cost of molding by simply and easily forming the aluminum plate. There is.

Still another object of the present invention is to manufacture an aluminum plate molding machine that can be used stably for a long period of time while minimizing the labor costs such as easy manufacturing as well as easy to manufacture by forming a molding machine for molding the aluminum plate material and the aluminum plate material using the same To provide a way.

The aluminum plate molding machine of the present invention for achieving the above object and the lower mold on the rectangular rectangular parallelepiped in which the core of the square plate is formed in the center of the upper surface; A core casing covered by the core; An upper mold coupled to an upper surface of the lower mold; Characterized in that the cover mold is fastened to the upper surface of the upper mold.

The present invention is to inject the resin into a thin soft aluminum sheet material by injection molding molding the aluminum plate without deformation, and to easily and easily molded the aluminum plate material to minimize the cost of molding to reduce the price of the product It is inexpensive and has a special advantage that the molding machine for molding aluminum plate material has a simple structure, which is easy to manufacture and can be used stably for a long time while minimizing expenses such as labor cost.

EMBODIMENT OF THE INVENTION Hereinafter, with reference to an accompanying drawing, preferable Example of this invention aluminum plate molding machine and the manufacturing method of the aluminum plate material using the same is demonstrated in detail.

1 is a perspective view of an aluminum sheet molding machine of the present invention, FIG. 2 is an exploded perspective view of an aluminum sheet molding machine of the present invention, and FIG. 3 is a flowchart of a process of manufacturing an aluminum sheet using the aluminum sheet molding machine of the present invention. A lower mold 10 on a rectangular rectangular parallelepiped in which a central plate-shaped core 11 is formed at the center thereof; An aluminum plate 20 covered by the core 11; An upper mold 30 coupled to an upper surface of the lower mold 10; The cover mold 40 is fastened to the upper surface of the upper mold 30.

The lower mold 10 is made of metal, and a core 11 is formed at the center of the upper surface, and circular grooves 13 for inserting the connecting rod 12 are formed at both edges thereof.

The upper mold 30 is made of metal, and the groove 31 through which the aluminum plate 20 is inserted is penetrated at the center thereof, and the circular groove 32 for inserting the connecting rod 12 is penetrated at both edges thereof.

In addition, the cover mold 40 is made of metal, and a cylindrical protrusion 41 protrudes upward in the center portion, a resin inlet 42 penetrates through the center of the protrusion 41, and the connecting rod 12 at both edges thereof. The insertion circular groove 43 penetrates.

Next, a method of molding an aluminum sheet using an aluminum sheet molding machine configured as described above will be described.

In the method of manufacturing an aluminum sheet using an aluminum sheet molding machine of the present invention, a connecting rod 12 is inserted into a circular groove 13 of a lower mold 10, and an aluminum sheet assembly process of covering the aluminum sheet 20 with a core 11 ( Step S1); An upper mold assembly process (step S2) of inserting the circular groove 32 of the upper mold 30 into the connecting rod 12 of the lower mold 10 and inserting the aluminum plate 20 into the groove 31; A cover mold assembly process (S3 step) of assembling the cover mold 40 by inserting a circular groove 43 of the cover mold 40 into the connection rod 12 on the upper mold 30; A primary molding process (step S4) of primary molding for injecting and molding resin into the resin inlet 42 of the cover mold 40; A lower mold lowering step (S5 step) of lowering the lower mold 10 by the width of the aluminum plate 20; A secondary molding process (step S6) of injecting resin into the resin inlet 42 of the cover mold 40 to perform secondary molding; The cover mold 40 is removed, and the lower mold 10 is increased by the width of the aluminum plate 20 so as to take out a product.

As the resin to be injected into the resin inlet 42 in the first and second molding processes (steps S4 and S5), polystyrene or polypropylene is preferably used.

As described above, in the method of manufacturing an aluminum sheet using the aluminum sheet molding machine according to the present invention, as shown in FIG. The aluminum plate 20 is covered.

Next, in step S2, the circular groove 32 of the upper mold 30 is inserted into the connecting rod 12 of the lower mold 10, and the aluminum plate 20 is inserted into the groove 31 to allow the upper mold 30 to be inserted. Assemble

Subsequently, after inserting the circular groove 43 of the cover mold 40 into the connecting rod 12 on the upper mold 30 in step S3, the cover mold 40 is assembled, and in step S4 of the cover mold 40 First injection molding is performed by injecting polystyrene or polypropylene into the resin inlet 42.

Subsequently, in step S5, the lower mold 10 is lowered by the width of the core casing 20, and in step S6, polystyrene or polypropylene is introduced into the resin inlet 42 of the cover mold 40. Injection and secondary molding.

At this time, the injected polystyrene (polystyrene) or polypropylene (polypropylene) enters into the aluminum plate 20 in the upper mold 30, so that the core 11 of the lower mold 10 blocks the lower portion of the aluminum plate 20. The injected polystyrene or polypropylene is injection molded together with the aluminum plate 20 in the aluminum plate 20.

Then, the cover mold 40 is removed in step S7, and the lower mold 10 is raised by the width of the aluminum plate 20 to take out the product. At this time, the core 11 of the lower mold 10 is made of the aluminum plate ( The core 11 pushes the aluminum plate 20 upward when the width is increased by 20, and the aluminum plate material in which the resin is molded therein is taken out from the upper mold 30.

While the present invention has been described as a preferred embodiment, the present invention is not limited thereto, and various modifications can be made without departing from the spirit of the invention.

1 is a perspective view of an aluminum sheet molding machine of the present invention,

Figure 2 is an exploded perspective view of the aluminum plate molding machine of the present invention,

Figure 3 is a flow chart of the aluminum plate manufacturing process manufactured by the method for producing an aluminum plate using the aluminum plate molding machine of the present invention.

<Explanation of symbols for main parts of drawing>

10: lower mold 11: core

12: connecting rod 13: circular groove

20: aluminum plate 30: upper mold

31: core groove 32: circular groove

40: cover mold 41: protrusion

42: resin inlet 43: round groove

Claims (6)

A lower mold 10 on a rectangular rectangular parallelepiped having a rectangular plate-shaped core 11 formed at the center of the upper surface thereof; An aluminum plate 20 covered by the core 11; An upper mold 30 coupled to an upper surface of the lower mold 10; Aluminum plate molding machine, characterized in that consisting of a cover mold 40 is fastened to the upper surface of the upper mold (30). The method of claim 1, wherein the lower mold 10 is made of metal, the core 11 is formed in the center of the upper surface, and the circular groove 13 for inserting the connecting rod 12 is formed at both edges. Aluminum sheet forming machine. According to claim 1, wherein the upper mold 30 is made of metal, the groove 31 through which the aluminum plate 20 is inserted into the center portion is penetrated, and the circular groove 32 for inserting the connecting rod 12 at both edges An aluminum plate molding machine characterized in that the penetrated. The method of claim 1, wherein the cover mold 40 is made of metal, the cylindrical projection 41 is protruded upward in the central portion, the resin inlet 42 is penetrated through the center of the projection 41, both edges The connecting rod 12 is inserted into the circular groove 43, characterized in that the aluminum plate molding machine penetrates. Inserting the connecting rod 12 into the circular groove 13 of the lower mold 10, the aluminum plate assembly process of covering the aluminum plate 20 on the core 11 (step S1); An upper mold assembly process (step S2) of inserting the circular groove 32 of the upper mold 30 into the connecting rod 12 of the lower mold 10 and inserting the aluminum plate 20 into the groove 31; A cover mold assembly process (S3 step) of assembling the cover mold 40 by inserting a circular groove 43 of the cover mold 40 into the connection rod 12 on the upper mold 30; A first molding process (step S4) of first molding by injecting resin into the resin inlet 42 of the cover mold 40; A lower mold lowering step (S5 step) of lowering the lower mold 10 by the width of the core casing 20; A secondary molding process (step S6) of injecting resin into the resin inlet 42 of the cover mold 40 to perform secondary molding; Removing the cover mold 40, raising the lower mold 10 by the width of the aluminum plate 20, the aluminum plate material using an aluminum plate forming machine, characterized in that the product taking out step (S7 step) to take out the product. Manufacturing method. The method of claim 5, wherein the resin injected into the resin inlet 42 in the first and second molding processes (steps S4 and S6) is polystyrene or polypropylene. .

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