JPH0739237B2 - METHOD AND APPARATUS FOR MANUFACTURING DECORATED EQUIPMENT HAVING INlaid SIGN - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing method and a manufacturing apparatus for a decorative article having a pattern formed by an inlay technique.

[0002]

2. Description of the Related Art This kind of ornament has been formed by a so-called inlaying method in which a main body formed to have a constant outer shape is engraved with a pattern and a metal is fitted therein. For this reason, it is possible that it is done by a skilled person, and the rate of failure is very high, and there is a problem that the inlaid metal is likely to protrude from the groove and the adhesive may easily stick out between the groove and the metal.

Therefore, the inventor of the present invention places a main body made of resin or the like in a molding die, pours a low melting point metal into a groove of a pattern forming portion formed in advance in the main body, and fills it like insert molding to obtain a pattern similar to an inlaid pattern. We have developed a technique for forming patterns.
When the metal is filled with this forming die, the metal is filled only in the pattern forming groove, so that there is no problem of protruding from the groove.

However, it has been found that the adhesion between the main body and the metal depends on their morphology and the mutual relation of the materials.

Further, although it has a low melting point, it is difficult to guide the hot water to a plurality of pattern forming portions because it is filled with molten metal.
It was pointed out that there is a problem that the main body may be discolored depending on the pattern, or the main body may be partially melted by heat.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned points, and the problem is that the molten metal adversely affects the main body regardless of the pattern of the main body of the ornament. Rather, it is intended to be able to manufacture a decorative article having a pattern similar to that formed by the inlaying technique, instead of being attached together.

[0007]

Means for Solving the Problems In order to solve the above problems, the present invention provides a mold cavity having a fixed mold shape provided on mating surfaces of a pair of molds, which is rotatable when filling the inlaid metal. The main body of the ornament is stored, and the inlaid metal melted from the direction of rotation is centrifugally cast from the runner leading to the inlay forming part in the mold cavity, and at the same time, the air in the mold cavity is moved by moving the metal to the mold cavity. To push out of the mold.

Further, in order to carry out the above method, the inlay forming portions 1 and 2 having a constant outer shape and provided on both front and back surfaces thereof,
Further, in a device for manufacturing an ornament by filling the inlay forming portion of the main body 3 of the ornament with a structure in which the respective inlay forming portions are in communication with each other, a pair of forming dies 4 composed of rotatable mating dies 4 5, mold cavities 6 and 7 having a constant mold shape for accommodating the main body 3 are formed on the mating surfaces, and from the center of rotation of the molding die to the inlay forming portion of the main body accommodated in the mold cavity. An apparatus in which a facing runner 8 and an air vent passage 9 for removing the air pushed out from the inlay forming portion by the inflow of the molten inlay metal to the outside of the forming die are formed in one or both of the pair of forming dies 4, 5. To use.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will be given below with reference to the drawings. 1, 2,
FIG. 4 shows an apparatus according to the present invention. The ornament 12 manufactured by the mold of FIG. 2 has a form as shown in FIG. 5 and has a pattern 13 like inlaid on the surface. .

The body 3 of the ornament 12 is, in the example shown,
It has a plano-convex lens-like outer shape with a bulging front surface, and a mesh-shaped inlay-forming portion 1 is formed in a groove shape on the front surface side, and on the back surface side, for example, a mounting base for mounting this ornament 12 The inlaid formation portion 2 is formed in a concave shape, and the inlaid formation portions 1 and 2 are overlapped at the connecting portion 14.

When the body 3 is made of synthetic resin, the synthetic resin material used is preferably methacrylic resin, unsaturated polyester resin, urea resin, but melamine resin, phenol resin, epoxy resin, polyacetal resin. Etc. are also available. 1 for material 12 above
It is required to have heat resistance of 20 ° C or higher.

Other materials that can be used for the main body 3 include wood such as ebony, ceramics, and metal. However, when the present invention is carried out for the purpose of providing a relatively inexpensive decoration with the inlay pattern and enabling mass production, it is preferable to use the above-mentioned resin.

The main body 3 made of these materials is formed into a predetermined outer shape in advance, and the required inlay forming portions 1 and 2 are provided on both front and back surfaces of the main body 3 and the main body 3 is set in a molding die described below.

A pair of molding dies 4 and 5 made of rotatable mating dies have a disc shape with mating surfaces being flat (see FIG. 1), and a molding die 5 having a back side inlaid pattern portion 2 is placed below. The molding die 4 having the front side inlaid pattern portion 1 is arranged on the upper side, and a pouring port 11 is formed in the center portion.

From the center pouring port 11, a large number of runners 8 are formed radially at substantially equal angular intervals.
Mold cavities 6 and 7 capable of accommodating the accessory body 3 are formed at the tips of the molds.

The form of these mold cavities 6, 7 is shown in FIG.
As understood by comparing (a) and (b) with FIG. 5, in order to form the front mold cavity 6 having a constant outer shape before forming the front inlay forming portion 1 and the back inlay forming portion 2. And the concave portion 10 of.

As shown in FIG. 2 (a), the illustrated front mold cavity 6 is formed in a convex lens shape that conforms to the surface of the ornament 12, and the tip 8a of the runner 8 extending from the center toward the surface forming portion.
Has reached. Further, an air vent passage 9 is formed at the peripheral edge of the front mold cavity 6 so as to match the front pattern forming portion 1, and the outer end portion of the air vent passage 9 is exposed to the outside of the molding die.

Reference numeral 9a shows a main road of the air vent passage 9, and 9b shows a branch road that follows it. The tip of the branch path 9b is connected to the front side pattern forming portion 1 as described above (shown by a chain line in FIG. 2A).

As shown in FIG. 2B, the illustrated back mold cavity 7 is formed by further forming the above-mentioned concave mold portion 10 in the flat bottom concave portion, and the tip 8b of the runner 8 extends to the concave mold portion 10.
Reference numeral 15 indicates a runner step. An air vent passage 9 is also formed in this mold cavity 7.

Fitting irregularities 16 and 17 for aligning the mold cavities 6 and 7 are provided on the molding surfaces of the pair of molding dies 4 and 5, respectively. The illustrated mold is made of hard rubber having heat resistance. A rubber material suitable for this purpose is readily available and is made of rubber. Therefore, the runner 8 and the air vent passage 9 are set, and in particular, the air vent passage 9 is engraved in accordance with the inlay forming portions 1 and 2. Will be easier and the mold can be securely closed.

Manufacturing Method Setting Step A main body 3 (FIG. 3 (a)) having a constant outer shape and inlaid forming portions 1 and 2 (FIG. 3 (b)) is formed on the lower molding die 5 of the molding die. Place in mold cavity 7. At this time, the back side inlay forming portion 2 of the main body 3 housed, the tip of the runner 8 and the air vent 9
So that it matches the position of.

Mold Closing Step Next, the upper molding die 4 aligned with the lower molding die 5 is overlaid thereon to close the mold (FIG. 4). At this time, the runner 8 and the air vent passage 9 of the upper molding die 4 are both on the front side inlaid forming portion 1.
Matches exactly.

Casting Process A mold comprising a pair of molds 4 and 5 whose molds are closed is put into a centrifugal casting machine, and a low melting point inlaid metal is filled from the pouring port 11 toward the mold cavities 6 and 7. Due to the rotating centrifugal force, the molten metal travels radially outward in the runner, and fills the front inlay forming portion 1 of the upper forming die 4 and the back inlay forming portion 2 of the lower forming die 5.

At this time, the air in both inlaid formation portions 1 and 2 moves out of the forming die through the air vent passage 9 and the inlaid metal fills both inlaid formation portions 1 and 2 and at the same time is completely pushed out from them. Therefore, bubbles do not remain in the inlaid pattern portion 13 or the groove.

Mold Opening Step The molding tool is opened and the ornament 12 is taken out. Since a small amount of flash is left at the connection with the runner 8 on the ornament 12, the ornament 12 can be cut and shaped, and the ornament 12 can be plated if necessary.

Plating Step Since the pattern portion 13 of the ornamental product 12 of the present invention is integrally connected to one another, when the plating is post-processed, it is only necessary to connect the plating electrode at one place. In a conventional inlay or an ornament having a pattern similar to the inlay, since the metal of each part is not connected and is independent, a large number of electrodes must be connected. However, the whole pattern part 13 of the ornament 12 according to the present invention is I don't need to because I'm in contact with each other.

As the inlay metal used for the ornament 12 according to the present invention, a low melting point alloy mainly containing Sn (tin) or Pb (lead), or a ternary alloy including Sb (antimony) is used. it can. In order to improve the throwing power of the plating, the ratio of Sn should be increased, but the flow of hot water becomes worse,
On the contrary, if the proportion of Pb is increased in order to improve the flow of hot water, the plating quality deteriorates. Therefore, Sn: Pb can be appropriately adjusted within the range of 30:70 to 90:10.

Structure of Ornamental Product In the decorative product 12 manufactured according to the present invention, as shown in FIG. 5, the pattern forming portions 1 and 2 formed on the entire surface of the main body are filled with metal and fixed integrally. As shown in FIG. 6, an edge frame-shaped pattern 14 on the periphery of the body 3 and an independent pattern 15 in the body 3 can be easily manufactured. The ornament 12 shown in FIG. 6 may be designed to have a structure in which the edge frame-shaped pattern 14 is molded at the peripheral edges of the mold cavities 6 and 7, and the independent pattern 15 is connected to the back side ( (Fig. 7).

[0029]

Since the present invention is constructed and operates as described above, the inlay pattern formed on the main body 3 is integrally attached to the main body, so that there is no risk of it coming off and the inlaid metal The main body 3 is overheated because the flow of
Since it does not deteriorate, the decorative article having an inlaid pattern can be easily manufactured regardless of the pattern. Further, since all the inlaid parts of the ornamental article according to the present invention are connected, there is an effect that plating is easy, a manufacturing process can be shortened, and quality can be improved.

[Brief description of drawings]

FIG. 1 is a partial plan view of one molding die.

FIG. 2A is a plan view of one mold cavity. (B) The top view of the other mold cavity.

FIG. 3 (a) is a cross-sectional view of a main body prototype. (B) Sectional drawing which provided the inlay formation part in the main body. (C) A sectional view of the ornament.

FIG. 4 is a cross-sectional view showing a state where the main body is housed in a molding die.

FIG. 5 is a perspective view of an example of a decorative article.

FIG. 6 is a plan view of another example of the decorative article.

7 is a sectional view taken along line VII-VII in FIG.

Claims (6)

[Claims] 1. A low-melting inlay of the inlay forming portion of a main body of a decorative article having a constant outer shape, concave inlay forming portions being provided on both front and back surfaces thereof, and having a structure in which each inlay forming portion communicates with each other. A method of manufacturing a decorative article by filling with metal, the main body of the decorative article being housed in a mold cavity having a fixed mold shape provided on a mating surface of a pair of molds, which is rotatable, and a rotation center direction The inlaid metal melted from the mold is centrifugally cast from a runner communicating with the inlay forming portion in the mold cavity, and at the same time, the air in the mold cavity is pushed out of the mold by moving the metal to the mold cavity. A method of manufacturing a decorative article having a pattern. 2. The method for producing an ornamental product having an inlaid pattern according to claim 1, wherein one electrode is connected to the inlaid metal filled in the inlaid forming portion, and the whole is plated. 3. The inlay forming portion of a main body 3 of a decorative article having a constant outer shape, concave inlay forming portions 1 and 2 being provided on both front and back surfaces thereof, and having a structure in which the respective inlay forming portions communicate with each other. A device for filling a low melting point inlaid metal and manufacturing an ornament, comprising a pair of molds 4 and 5 composed of rotatable mating molds, and a fixed mold shape in which the main body 3 is housed on the mating surfaces. A runner 8 which forms the mold cavities 6 and 7 having and which extends from the center of rotation of the mold to the inlay forming portion of the main body housed in the mold cavity.
An air vent passage 9 is formed in one or both of the pair of molding dies 4 and 5 for removing the air pushed out from the inside of the inlay forming part by the inflow of the molten inlay metal to the outside of the molding die. Equipment for manufacturing ornaments. 4. The apparatus for manufacturing an ornamental product having an inlaid pattern according to claim 3, wherein one of the pair of molding dies 4, 5 is provided with a recessed mold portion 10 overlapping with the inlaid formation portion 2 on the back surface side of the main body 3. 5. The decoration having an inlaid pattern according to claim 3, wherein the inlaid metal is a metal containing tin and lead as main components, and the pair of molding dies 4 and 5 is made of rubber having heat resistance. Product manufacturing equipment. 6. The pair of molding dies 4, 5 are disc-shaped with a mating surface formed of a flat surface, and a pouring port 11 is formed in the center thereof.
4. A decoration having an inlaid pattern according to claim 3, wherein a large number of runners 8 radially extend from the pouring port 11 and mold cavities 6 and 7 are formed at the tip of each runner 8. Product manufacturing equipment.