JP2007260766A - Internally chilled article production method and internally chilled article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the quality of an internally chilled article by reducing such adverse influence on the internally chilled article that an internal chill material is easily cracked or the internal chill material is melted and its shape is easily lost, and improving the adhesion between the internal chill material and a casting metal. <P>SOLUTION: An internally chilled article production method is provided in which the internal chill material W is arranged in a mold K, and then a melted casting metal M is poured into the mold K to produce the internally chilled article, wherein tin or a tin alloy is used as the casting metal M. The tin alloy contains at least one kind of substance selected from among Sb, Zn, Al, Ca, Cu, Fe, Mg and Si. The tin or tin alloy has high specific gravity, has satisfactory wettability with the internal chill material, and is easily joined to the internal chill material without forming an oxide film. Further, because of the relatively low melting point of the tin or tin ally, the temperature of molten metal can be set relatively low. Accordingly, adverse influences on the internally chilled article such as easy cracking of the internal chill material by thermal impact or easy shape collapse of the internal chill material due to melting are avoided. The internally chilled article of high quality can be obtained throgh the above procedure. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a cast product that manufactures a cast material by casting and a cast product.

Conventionally, as a method of manufacturing this type of cast product, for example, a technique is disclosed in Japanese Patent Laid-Open No. 11-157296.
In this manufacturing method, glass as a casting material is placed in a mold, and then a molten aluminum alloy is cast into the mold to manufacture a casting product, which is used as a decorative product.

JP-A-11-157296

  By the way, in this conventional method for producing a cast product, since amorphous glass is used as a cast material and an aluminum alloy is used, the aluminum alloy has a relatively high melting point, etc. The cast-out material tends to break or the shape of the cast-out material dissolves and the shape of the cast-out material tends to collapse. However, there is a problem that the quality is not always good and the quality is inferior.

  The present invention has been made in view of the above-mentioned problems, and makes it difficult to adversely affect the cast-out material, such as the cast-out material being easily cracked or the cast-out material being melted and losing its shape. It is an object of the present invention to provide a method for producing a cast product and improved cast quality by improving adhesion with the product.

  The technical means of the present invention for achieving such an object is to provide a cast product in which a cast material is placed in a mold, and then a molten cast metal is cast into the mold to produce a cast product. In the manufacturing method, it is set as the structure which used tin or a tin alloy as said casting metal.

  Thus, when producing a cast product, the cast material is placed in the mold, and then the molten cast metal is cast into the mold. In this case, the temperature of the molten metal is desirably in the range of 230 ° C to 330 ° C.

  In this case, the cast metal is tin or a tin alloy, has a high specific gravity, good wettability with the cast-in material, and can be easily joined to the cast-in material without forming an oxide film. So-called anchor effect is high, and in the case of tin or tin alloy, since the melting point is relatively low, the temperature of the molten metal can be set relatively low. Therefore, the material and temperature conditions of these cast metals Due to the above, there is less adverse effect such that the cast-in material is easily cracked by thermal shock, and the cast-in material is dissolved and the shape is easily collapsed, and a high-quality cast product is obtained.

  And the said tin alloy is set as the structure containing the at least 1 sort (s) of containing material of Sb, Zn, Al, Ca, Cu, Fe, Mg, Si as needed. As a result, the flowability and wettability of the tin alloy are further improved, the hardness is increased, and the strength is increased. Therefore, the adhesion between the cast-in material and the cast metal is further improved, and high quality is achieved. A cast product is obtained.

  In this case, if necessary, the contained material is contained in the tin alloy in an amount of 0.01 to 30% by mass. Within this range, the melting point can be set before and after the melting point of tin, and the melting point can be kept relatively low. In addition, the flowability and wettability of the tin alloy are improved, and the hardness is increased and the strength is increased. Furthermore, since no Pb is added, safety to the human body is also increased.

  Moreover, it is set as the structure which contains 0.1-10 mass% of Cu at least in the said tin alloy as said content material as needed. In particular, when Cu is contained, the shrinkage rate becomes small and the shrinkability becomes low, so that it easily becomes a shape that matches the shape of the mold, and the flowability and wettability of the tin alloy are improved. The adverse effect on the stuffed material is further reduced.

  Furthermore, if necessary, the content of the tin alloy is at least 1 to 20% by mass and 0.1 to 10% by mass of Cu. Since Sb is contained in addition to Cu, the shrinkage rate is further reduced and the shrinkage is reduced, which makes it easier to form a shape that matches the mold shape, and improves the flowability and wettability of the tin alloy. In addition, the adverse effect on the cast-in material is further reduced.

And as needed, it is set as the structure which uses at least 1 sort (s) among an ore, glass, resin, a metal, and ceramics as the said cast-in material.
In this case, the resin generally has a low softening point. However, if a resin having a relatively high softening point is selected, the present invention can set the melting point of tin or tin alloy to be relatively low and the temperature of the molten metal to be relatively low. Therefore, adverse effects such as deformation on the resin can be reduced, and a high quality cast product can be obtained.

  If necessary, it is effective to use a mold using oil sand as the mold. Since it is oil sand, it becomes possible to press and fix the cast-in material on the mold after molding, so that the cast-in material can be stabilized. In addition, since the melting point of tin or tin alloy is relatively low, oil seizure is suppressed, the skin of the cast product can be finished cleanly, and it is suitable for the manufacture of decorative products.

  Furthermore, it is effective to produce by the lost wax method if necessary. Since the cast-in material can be held in the wax, the cast-in material can be arranged at an arbitrary place, and a degree of freedom in design can be obtained.

  Further, the technical means of the present invention for achieving the above object is a cast product manufactured by the above-described method for manufacturing a cast product. The close contact between the cast-out material and the cast metal is improved, and the quality is improved.

  According to the method for producing a cast product and the cast product of the present invention, by using tin or a tin alloy as a cast metal, the specific gravity is heavy, the wettability is good, and the cast product is made without forming an oxide film. It is easy to join well, that is, the so-called anchor effect of mechanical joining is high, and since the melting point of tin or tin alloy is relatively low, the temperature of the molten metal can be set relatively low. Due to the material and temperature conditions of the cast metal, there are less adverse effects such as the cast-out material being easily cracked by thermal shock and the cast-out material being melted and losing its shape. It is possible to improve the close contact condition and to produce a high quality cast product. The present invention can be usefully used in, for example, a decorative article.

Hereinafter, a method for manufacturing a cast product and a cast product according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
First, a method for manufacturing a cast product according to an embodiment of the present invention will be described. As shown in FIGS. 1 and 2, a cast product W is placed in a mold K, and then a molten cast metal M is disposed. The cast product S is manufactured by casting into the mold K.

  As the casting metal M, tin or a tin alloy is used. The melting point of tin is generally 232 ° C.

  The tin alloy contains at least one substance containing Sb, Zn, Al, Ca, Cu, Fe, Mg, and Si, and has a melting point around the melting point of tin. As a result, the flowability and wettability of the tin alloy are improved, and the hardness is increased and the strength is increased. Therefore, the adhesion between the cast-in material and the cast metal is further improved, and high quality is achieved. A cast product is obtained.

  The contained material is contained in the tin alloy in an amount of 0.01 to 30% by mass. As a tin alloy, for example, as shown in FIG. 3 to FIG.

  As the casting material W, at least one of ore, glass, resin, metal, and ceramics is used.

  Various molds may be used as the mold K. For example, a mold K using oil sand can be used. Moreover, you may make it manufacture by a lost wax method.

  Therefore, according to the manufacturing method of the cast product S according to this embodiment, as shown in FIG. 1, the cast material W is arranged in the mold K, and then the molten cast metal M is applied to the mold K. We will cast it. In this case, the temperature of the molten metal is set to 230 ° C to 330 ° C.

  In this case, the cast metal M is tin or a tin alloy and has a high specific gravity and good wettability. Therefore, the cast metal M can be easily joined to the cast-out material W without forming an oxide film. In the case of tin or tin alloy, the melting point is relatively low, so that the temperature of the molten metal can be set relatively low. Therefore, the material and temperature conditions of these cast metals M are high. Due to the above, there are less adverse effects such as the cast-up material W being easily broken by thermal shock and the cast-up material W is easily melted and deformed, and a high-quality cast product can be obtained.

  In particular, a casting material W whose melting point is lower than the melting point of the cast metal M or lower than the temperature of the molten metal of the cast metal M, particularly a resin generally has a low softening point, but a resin having a relatively high softening point should be selected. In the present invention, since the melting point of tin or tin alloy is relatively low and the temperature of the molten metal can be set relatively low, adverse effects such as deformation on the resin can be reduced, and as such, high quality cast products. S is obtained.

Next, examples will be described.
<Example 1>
In Example 1, a tin alloy was used as the cast metal M. Here, the tin alloy contains 99.7% by mass of Sn and 0.3% by mass of Cu as a contained substance. The melting point is 230 ° C.

  As the cast material W, black granite was used and processed into a rectangular parallelepiped or a cube as shown in FIG.

  Then, as shown in FIG. 1, black granite was placed in a cylindrical mold K, and then a molten tin alloy was cast into the mold K to produce a cast product S. FIG. 7 shows a plan view of an example of the cast product S with the black granite exposed.

<Example 2>
In Example 2, the alloy example 11 shown in FIG. This tin alloy contains 91% by mass of Sn, 7% by mass of Sb and 2% by mass of Cu as contained substances. The melting point is 250 ° C. Others were the same as in Example 1 above.

Next, an experimental example according to this embodiment will be described.
<Experimental Example 1> Effect of Volume of Casting Material W on Casting Ingot Using the above-described tin alloy according to Example 1 as black granite, 20 mm long × 20 mm wide × 10 mm high, 15 mm long × 15 mm long × high 10 mm in length, 10 mm in length, 10 mm in width, 10 mm in height, 5 mm in length, 5 mm in width, and 10 mm in height, each with a tin alloy melt temperature of 280 ° C and a diameter of 40 mm, height A cast product S was prepared with the above-described mold K of 10 mm, and the influence of the volume of the cast material W on the cast product was examined.
Good product was obtained regardless of the size of black granite.

  FIG. 8 shows an electron micrograph of a cross section (boundary of a tin alloy and black granite) cut and polished in the cast product S in black granite (10 mm × 10 mm × 10 mm). As shown in FIG. 8, the tin alloy and the black granite were in close contact with each other, and the tin alloy also entered the irregularities of the black granite, and no holes were seen.

<Experimental example 2> Effect of volume of casting metal M on cast-in casting In the black granite (10 mm x 10 mm x 10 mm) used in experimental example 1 above, the thickness of the tin alloy is changed to affect the casting. The influence of the volume of the metal M was investigated. The produced cast products S were of three types: 40 mm diameter × 15 mm height, 40 mm diameter × 10 mm height, 40 mm diameter × 5 mm height.
A good product was obtained regardless of the change in the thickness (volume) of the tin alloy.

<Experimental example 3> Effect of volume of casting metal M on cast-in metal Cast metal affected by cast-in metal by changing diameter of tin alloy in black granite (10 mm x 10 mm x 10 mm) used in experimental example 1 above The effect of M volume was investigated. The produced cast-in products S were classified into four types: diameter 50 mm × height 10 mm, diameter 40 mm × height 10 mm, diameter 30 mm × height 10 mm, diameter 20 mm × height 10 mm.
Good products were obtained regardless of changes in the diameter (volume) of the tin alloy.

<Experimental example 4> Influence of arrangement of cast material W on castor In four types of black granite used in the above experimental example 1, the arrangement in the mold K, in particular, the direction with respect to the gate is varied, A cast-in product S was created and the effect was examined. The direction of the black granite is two directions, as shown in FIG. 9 (a), when the shortest side faces the gate and as shown in FIG. 9 (b), when the longest side faces the gate. It was. In the cast product S in each direction, a good product was obtained regardless of the difference in the arrangement of black granite.

<Experimental Example 5> Effect of Molten Metal Temperature on Casting In the Black Granite (10 mm × 10 mm × 10 mm) used in Experimental Example 1 above, the molten metal temperature of the tin alloy was changed to influence the molten metal temperature on the molten metal. I investigated. The molten metal temperature was set to three temperatures of 260 ° C., 280 ° C., and 300 ° C. A good product was obtained regardless of changes in the molten metal temperature.

<Experimental Example 6> Effect of Molten Metal Temperature on Casting In the cast-in product S prepared in Experimental Example 5 above, the adhesion strength of the cast-up material W to the cast metal M was examined. In the experiment, using a universal testing machine, the casting metal M was fixed and only the cast-out material W was pressed in the axial direction, and the maximum load at the time of coming out of the casting metal was measured.
The load at which the black granite separated from the tin alloy was in the range of 1.25 to 2.25 kN, and the product had good adhesion strength regardless of the temperature change.

  In addition, this invention is not limited to the said embodiment, Of course, it may change suitably within a predetermined range.

It is sectional drawing which shows the manufacturing method of the cast product which concerns on embodiment of this invention. 1 is a perspective view showing a cast product according to an embodiment of the present invention. It is a table | surface figure which shows the example (1-8) of a cast metal. It is a table | surface figure which shows the other example (9-13) of a cast metal. It is a table | surface figure which shows another example (14-16) of a cast metal. It is a perspective view which shows the shape of the cast-in-place material in the Example of this invention. It is a top view which shows the cast-in-place article concerning the Example of this invention. It is a drawing substitute electron micrograph which shows the cross section (boundary of a tin alloy and black granite) which cut | disconnected and polished the cast-finished goods which concern on the Example of this invention. It is a figure which concerns on the experiment example of this invention, and is a figure which shows the arrangement | positioning state to the casting_mold | template of the casting material for investigating the influence of the arrangement | positioning of the casting material on the casting.

Explanation of symbols

S Cast-in products W Cast-in materials M Cast metal K Mold

Claims (9)

In the method for producing a cast product, placing the cast material in the mold and then casting the molten cast metal into the mold to produce the cast product.
A method for producing a cast product, characterized in that tin or a tin alloy is used as the cast metal. 2. The method for producing a cast product according to claim 1, wherein the tin alloy contains at least one contained material of Sb, Zn, Al, Ca, Cu, Fe, Mg, and Si. 3. The method for producing a cast product according to claim 2, wherein the contained material is contained in the tin alloy in an amount of 0.01 to 30% by mass. The method for producing a cast product according to claim 3, wherein the tin alloy contains at least 0.1 to 10% by mass of Cu in the tin alloy. The method for producing a cast product according to claim 3, wherein the tin alloy contains at least 1 to 20% by mass of Sb and 0.1 to 10% by mass of Cu in the tin alloy. The method for producing a cast product according to any one of claims 1 to 5, wherein at least one of ore, glass, resin, metal, and ceramic is used as the cast product. The method for producing a cast product according to any one of claims 1 to 6, wherein a mold using oil sand is used as the mold. The method for producing a cast product according to any one of claims 1 to 7, wherein the production is performed by a lost wax method. A cast product manufactured by the method for manufacturing a cast product according to any one of claims 1 to 8.