JP2009262208A - Pear skin-like surface structure, and method for producing pear skin-like surface structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pear skin-like surface structure which can easily form a surface structure emitting peculiar blunt metallic luster imitating the designed plane of a structure molded by a sand mold casting method on the surface of a structure molded by a die casting method, and to provide a method for producing the same. <P>SOLUTION: The pear skin-like surface structure 1 is composed of: a base material 6 composing a structure 3 and in which ruggedness 5 is formed at the surface 4; and a transparent or translucent coat layer 7 formed at the surface 4 of the base material 6 in which the ruggedness 5 is formed and matted as required. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a surface structure of a structure formed by a die casting method, and more particularly to an unfinished surface structure in which irregularities are formed on the surface and a method for producing the unfinished surface structure.

  Consumer preferences have diversified and, for example, in the motorcycle industry, there is a tendency to prefer commercial vehicles that imitate racing vehicles.

  Many of the engines provided in this motorcycle dedicated to racing are made up of a cylinder block, a cylinder head, a crankcase, and the like, which are made of an aluminum alloy or a magnesium alloy and are molded by a sand casting method. In other words, the exterior and design surfaces of the engine provided in a motorcycle dedicated to racing exhibit a textured finish that is molded by sand casting, giving it a unique dull metallic luster and a sunken gray appearance.

  On the other hand, an engine provided in a commercially available motorcycle is generally composed of a cylinder block, a cylinder head, a crankcase, etc., which are made of an aluminum alloy or a magnesium alloy and are molded by a die casting method suitable for mass production. The

  The base material of the structure formed by the die casting method is flat and glossy, and a hot water flow pattern may be seen, which is different from the appearance of the structure constituting the engine provided in the motorcycle dedicated to racing.

  Therefore, in the surface structure of a conventional structure cast by a die casting method such as a die casting method, the base material of the substrate is polished to obtain a mirror-like and highly reflective metallic luster, and then a transparent gloss paint Or painted with opaque paint such as silver paint or black paint.

  In addition, shot blasting is applied to the base of a conventional structure cast by a die casting method such as a die casting method in order to remove burrs generated during casting or to improve the adhesion of an opaque colored coating. It was done.

Furthermore, in the surface structure described in Patent Document 1, on the surface of a base material such as a metal material, in order from the side closer to the surface of the base material, a glitter layer including a glitter powder material and a resin component, and a metal By forming a dry-plating layer that contains, and a topcoat layer so that specular reflection light from the dry-plating layer and scattered reflection light from the glitter layer can be observed, a metallic luster and a plain texture can be obtained. To obtain a brilliant appearance with a sense of depth and without a calm impression.
JP 2006-35160 A

  The surface structure described in Patent Document 1 requires a multi-layered surface structure in order to obtain a grain-like glittering appearance, and is not suitable for a mass-produced product with low productivity and low cost. Further, even if the base material of the structure molded by the die casting method is polished or colored with an opaque paint, a ground appearance cannot be obtained. Further, the base material of the structure subjected to the shot blasting is formed on an uneven surface having a metallic luster, and does not have a glossy and unfinished appearance.

  Here, in the motorcycle market, there is a tendency that a commercial vehicle imitating a dedicated vehicle that has been active in a race is preferred. In a two-wheeled vehicle, the appearance of the engine portion greatly affects the appearance of the entire vehicle.

  In other words, the appearance of the structure molded by the die casting method that constitutes the engine part of the commercial vehicle has a large effect on the overall appearance of the commercial vehicle, and the appearance is greatly different from the appearance of the structure molded by the sand casting method. If they are different, the overall appearance of the commercial vehicle will not be able to adequately reproduce the appearance of the race vehicle, giving the consumer a very different impression.

  In the present invention, a surface structure that emits a unique dull metallic luster that imitates the design surface of a structure molded by a sand casting method can be easily formed on the surface of a structure molded by a mold casting method. A method for producing a surface structure and a ground surface structure is proposed.

  In order to solve the above problems, in the present invention, a base material having a structure and having irregularities formed on the surface thereof, and a transparent or translucent coat layer formed on the surface of the base material and frosted as desired. It is characterized by comprising.

  According to the present invention, a surface structure that emits a unique dull metallic luster that imitates the design surface of a structure molded by a sand casting method can be easily formed on the surface of a structure molded by a mold casting method. .

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a ground surface structure and a method for producing a ground surface structure according to the present invention will be described with reference to FIGS. 1 to 2.

  FIG. 1 is a partial cross-sectional view of a ground surface structure according to the present invention.

  As shown in FIG. 1, the ground surface structure 1 constitutes a structure 3, and is formed on a surface 6 of a base material 6 on which a surface 5 has unevenness 5 formed and on a surface 4 of the base material 6 on which the surface roughness 5 is formed. And a transparent or translucent coat layer 7 that is frosted as desired.

  The structure 3 is cast by a die casting method such as a die casting method. For example, an automobile wheel, a motorcycle cylinder block, a cylinder head, an engine component such as a crankcase, an outboard motor Aluminum alloy die casting such as casing, AV equipment frame, camera body, reel body, microscope arm base, sewing machine base and the like. Moreover, the structure 3 by a magnesium alloy die-casting and a zinc alloy die-casting may be sufficient.

  The material of the substrate 6 is a metal material such as an aluminum alloy, a zinc alloy, or a magnesium alloy. The base 6 constitutes a structure 3 such as a cylinder block, a cylinder head, and a crankcase of a motorcycle cast by a die casting method. The base material 6 cast by the die casting method is flat and shiny, and a hot water flow pattern can be seen. Shot peening and shot blasting are performed on the substrate 6. Then, the base material of the base material 6 is ground, and uniform unevenness 5 having a metallic luster is formed on the surface 4 of the base material 6.

  The coat layer 7 functions as a protective film for the substrate 6 and is a transparent or desired colored translucent resin film. When the coat layer 7 is colored, the transmittance is ensured so that the design surface f of the substrate 6 is transmitted. For the coat layer 7, a matte paint is used, and it is preferable that the coat layer 7 has a matte of about 50% to 80%. The coat layer 7 is formed by a known method such as air spray coating or electrostatic coating using a resin paint such as acrylic, urethane, epoxy, polyester, melamine, or a mixture of these. . The coat layer 7 can be made of a paint such as a water-based paint, a powder paint, or a synthetic resin paint. The film thickness of the coat layer 7 may be any thickness that can protect the substrate 6, and is preferably coated to a film thickness of 5 μm to 30 μm. Corrosion of the base material 6 is prevented by the coat layer 7 and the weather resistance of the structure 3 is ensured.

The textured surface structure 1 according to the present embodiment is a design surface of the structure 3 in which a desired matte transparent or translucent coat layer 7 is formed on the surface 4 of the substrate 6 on which the irregularities 5 are formed. f is constructed. On the design surface f of the ground surface structure 1, part of the incident light C _in is absorbed by the coat layer 7, and scattered reflected light C _ca is observed on the surfaces of the coat layer 7 and the substrate 6. . Then, the design surface f of the surface-like surface structure 1 can have a submerged gray-colored appearance with a unique dull metallic luster that is close to the design surface of the structure formed by the sand casting method. .

  Therefore, according to the ground surface structure 1 according to the present embodiment, the design surface f of the structure 3 molded by the die casting method is sufficiently imitating the appearance of the structure molded by the sand casting method. Become.

  FIG. 2 is a flowchart showing a method for producing a ground surface structure according to the present invention.

As shown in FIG. 2, first, in step S <b> 1, shot peening, shot blasting, or the like is performed on the base material 6 for the structure 3 molded by a die casting method such as a die casting method, and the surface of the base material 6. A uniform unevenness 5 is formed on 4. For example, a cylinder block, a cylinder, or a cylinder of a motorcycle in which the structure 3 uses aluminum alloy die casting materials ADC10, ADC10Z, ADC12, ADC12Z (JISH5302), magnesium alloy die casting materials MDC1B, MDC1D, MDC2B, MDC3B, MDC4 (JISH5303), etc. In the case of engine parts such as heads and crankcases, shot blasting of 30 to 60 seconds is performed at a projection amount of about 100 kg / min to 200 kg / min using a stainless steel projection material of about φ0.4 to φ0.6 mm. Is preferable. In addition to the stainless steel material, materials such as alumina, special steel, iron, SiO ₂ , zinc, aluminum, and aluminum alloy can be used for the projection material.

  Next, in step S2, a coat layer 7 is formed by applying a desired matte transparent or translucent paint to the surface 4 of the substrate 6 on which the irregularities 5 are formed. Depending on the properties of the paint used, drying such as natural drying, forced drying, and heat drying (baking) is performed. In addition, before applying a coating material, the corrosion resistance of the base material 6 can further be improved by degreasing the surface 4 of the base material 6 or performing a chemical conversion film treatment. Moreover, you may apply | coat a primer to the surface of the base material 6 before apply | coating a coating material.

  According to the manufacturing method of the ground surface structure according to the present embodiment, the ground surface structure 1 is formed on the structure 3 molded by the die casting method by a very simple manufacturing method. If it does so, the design surface f of the surface-like surface structure 1 will fully simulate the external appearance of the structure molded by the sand casting method.

  Therefore, according to the manufacturing method of the ground surface structure 1 and the ground surface structure according to the present embodiment, the structure molded by the sand casting method on the surface of the structure 3 molded by the die casting method. It is possible to very easily form a sunken gray surface structure with a unique dull metallic luster close to the design surface.

  If the manufacturing method of the surface-less surface structure 1 and the surface-less surface structure according to the present embodiment is applied to, for example, a structure molded by a die casting method that constitutes an engine part of a motorcycle, the appearance of the race-dedicated vehicle can be improved. It can give consumers an imitated impression.

FIG. 2 is a partial cross-sectional view of a ground surface structure according to the present invention. The flowchart which shows the manufacturing method of the surface-like surface structure which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 None Ground surface structure 3 Structure 4 Surface 5 Concavity and convexity 6 Base material 7 Coat layer

Claims (5)

A base material that constitutes a structure and has irregularities formed on the surface;
A textured surface structure comprising a transparent or translucent coating layer formed on the surface of the substrate and frosted as desired. The surface-less surface structure according to claim 1, wherein the structure is formed by a die casting method. 3. The ground surface structure according to claim 1 or 2, wherein the material of the base material is any one of an aluminum alloy, a zinc alloy, and a magnesium alloy. 4. The ground-like surface structure according to claim 1, wherein the coat layer is formed by coating a resin paint on a surface of the base material. 5. Form irregularities on the surface of the base material of the structure molded by the mold casting method,
A method for producing a solid surface structure, wherein a coat layer is formed by applying a desired matte transparent or translucent paint to the surface of a substrate on which the irregularities are formed.

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