KR19990024140A - Method and apparatus for manufacturing jewelry (jewelry) of accessories - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs.

The present invention relates to an apparatus and method for producing jewelry that can be used as accessories using resins (epoxy or homica) as the main raw materials, and to providing jewelry with excellent quality while providing various designs at a low price.

I. The technical problem to be solved by the invention.

Currently, jewelry accounts for almost all of the jewelry, such as brooches and earrings, and it is almost domestic.

Therefore, recently, a method of molding by injection using a synthetic resin or a jewel manufactured by injecting and curing a liquid resin (epoxy or homomica) into a silicone mold has been used.

However, the injection molding method requires a separate mold to manufacture the product according to the design that is changed in various ways, so that not only excessive mold manufacturing cost but also the cost increase of the product due to the mold manufacturing period and various consumer's preferences that change rapidly can be achieved. It is not economically feasible to meet, and the method of hardening by injecting into a silicone mold is not only possible to uniformize the product, but also has the disadvantage that the design has to make only one half side.

All. Summary of the Solution of the Invention.

In order to solve the problem, the present invention allows the manufacturing of both sides by using centrifugation, while the heating heating by centrifugation is changed to indirect heating so that the drying conditions are excellent and the composition is formulated to suit the molding conditions. By adjusting the time and temperature at a reasonable price, various designs can be provided.

la. Important uses of the invention

Jewelry used for accessories.

Description

Method and apparatus for manufacturing jewelry (jewelry) of accessories.

The present invention relates to a method and apparatus for manufacturing jewelry (jewelries) that can be used as accessories using epoxy or homica as a main ingredient, and to provide jewelry with excellent quality while providing various designs at a low price.

Jewelery is usually attached to accessories used for accessories such as brooches and earrings, and the appearance of the accessories varies considerably according to such jewelry, and in the accessories that emphasize the design of the appearance, the share of the jewelry is almost absolute, but such jewelry It is the domestic situation that usually relies on imports.

Therefore, in recent years, jewelry is molded in a large amount by injection using synthetic resin, but injection molding has the advantage that it can be provided at a low price because it is a method used for mass production, but accessories are not a function but a simple fashion pattern For this reason, since various patterns vary and are manufactured in a limited amount, injection molding must be made. In addition, since it requires considerable time and cost in the manufacture of these molds, practical use is impossible because of economical efficiency.

Therefore, recently, as shown in FIGS. 5 and 6, the indentation grooves 10 are formed in accordance with the shape of the gems to be molded into one side of the silicon mold 20, that is, the flexible material and the indentation grooves 10. It is prepared by injecting a liquid resin or homomica into the curing state in the air or using a dryer.

Therefore, the liquid resin injected into the silicon mold is processed by hand only at atmospheric pressure without any external molding conditions, so that bubbles are formed in the molded product mixed with air when cured or injected in the injected state. Since it is generated or processed by hand, it is impossible to homogenize the product.In addition, when curing, injection and curing are performed in two steps, and it takes a long time in curing time and also requires a separate drying facility. Therefore, the cause of the increase in cost and also the manufacturing method of this method must have one side should be a horizontal plane, there is a limit in providing a variety of designs of jewelry requiring a circle.

The present invention is to solve this problem, by applying a constant pressure during molding using centrifugation to prevent the mixing of air, and also to be heated to a constant temperature at the top of the silicon mold during centrifugation for molding By forming and curing at the same time, the curing is accelerated and centrifugation is used, so that various shapes of products can be obtained and uniformity can be achieved.

1 is a block diagram showing a manufacturing process of the present invention.

Figure 2 is a perspective view showing the external configuration of the device used in the present invention.

3 is a cross-sectional view showing a combined example of a silicon mold.

4 is a plan view showing the internal state of the mold;

Figure 5 is a perspective view showing the configuration of a conventional silicon mold.

6 is a cross-sectional view of FIG.

Explanation of symbols for main parts of drawings

1: silicon upper mold 2: silicon lower mold

3: injection hole 4: guide groove

5: molding groove 6: heater

7: lid 8: centrifuge

9: rotating disc

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First of all, in the present invention, when the liquid resin is formed in the product during the centrifugation, flow is smoothly generated in the mold, and there is no bubble even when it is cured by heat, and the product is damaged when the product is separated from the mold after curing. The results of various experiments are shown in the following examples in order to satisfy the conditions for the best productivity of the product without being there.

Example 1

Polytechnic Craft Supplies CG-565W or CG-570 16,000g

160 g of hardener

Accelerator DMA 12g

Accelerator CNR 12g

Accelerator CMR 12g

Among the raw materials used in the present invention, polytechnic for casting is a liquid resin obtained by dissolving unsaturated polyester as a polymerizable monomer having VINYLGROUP or ALLYLGROUP as a registered trademark of Choil Special Chemical Co., Ltd. Alternatively, when a peroxide catalyst and a designated accelerator are added and left at room temperature, it exothermicly polymerizes to gel after a few minutes to several tens of minutes, and hardens to a resinous material having insoluble, insoluble hard or elastic resin.

In addition, such polytechnics are divided by viscosity and pot life, respectively, for use in various applications, and used in the present invention has a viscosity of 2.0-4.0 at 25 ° C. and a pot life of 1-5 at 25 ° C. It is used by the company of minutes, and any product of another company having these characteristics will have the same effect.

In addition, DMA, CNR, and CMR used as accelerators are also used to improve molding as promoters for polytechnics.

Therefore, the compounding ratio, that is, the mixing ratio of the raw material for the mold and the curing agent, is injected into the centrifuge by molding and injected into the centrifuge. The raw material is cured by indirect heat, not direct heat, and the temperature of indirect heat is assumed to be in the range of 30-100 ° C, and the heat is applied within the range of 5 to 10 minutes.

At this time, the method of applying the heat of 30-100 ℃ does not only indicate the temperature of the heat applied as it is rotated for molding in the centrifuge, but it shows the temperature state after the molding is finished before separating the molded product from the mold. Also, the time range of 5-10 minutes does not represent the heating time of the heater applied to the silicon mold used in the centrifuge, and heat remains in the mold heated by the heating of the heater even after the centrifugation. All of the heat is transferred to the product, indicating the time until the product is removed from the mold.

If the product is removed before this time has elapsed, the product is broken or stretched when the product is separated from the mold.

Therefore, when the temperature and time to the molding condition is completely matched to the molding conditions, the product is completely molded and the quality of the product is the best.

In addition, even in the composition blended as in Example 1 using more than 16kg polytechnical craft supplies CG-565W or CG-570 for molding, the curing is significantly slowed and molding of the product by centrifugation When the flow is too fast at the time of forming a product, there is a problem in forming a uniform product, and even after forming by centrifugal separation, when the product is separated from the mold, it can be seen that the curing time must be considerably separated.

In addition, when the curing agent is used more than the standard value, the curing time is too fast for the surface of the product formed by centrifugation, so the surface hardens rapidly and the inside hardens due to the significant difference between the time that the surface and the inside are hardened. Therefore, when cured, it was found that cracks or torsions occurred in the molded product due to the difference in curing time between the surface and the inside.

In addition, the reason for using three types of accelerators is that they show the most ideal state for molding as an accessory jewelry, and the mixing ratio with the curing agent is excellent in the ratio of 13: 1 to 14: 1 or 10: 1. The ideal state was found to be the best at 13: 1.

In the case of centrifugation, the best curing condition can be found when the mold of silicon is heated by using a heater at the top of the mold, and if the mold is heated by direct heat when the mold is not rotated. It has been found that cracks, bubbles and torsions occur during curing.

In addition, in the centrifuge (8) is a silicon mold is mounted and rotated in a state of heating the silicon mold with a heater, the silicon mold coupled to the silicon upper mold (1) and the lower mold (2) centrifuge (8) In the state in which the silicon mold is rotated while being fixed and fixed to the rotating disk 9 of the original separator 8, the heater 6 is mounted on the lower end of the lid 7 so as to be heated at the top. In this way, to maintain a constant heating temperature, the power is cut off when heated above the proper temperature by the temperature sensor, and when the temperature falls below the proper temperature, the power is always applied while maintaining the constant temperature.

At this time, the inlet (3) is formed in the center of the upper mold and the inlet (3) is connected to the forming groove (5) along the guide groove (4).

Therefore, since the mold is heated in the rotating state, it is possible to obtain a uniform product during molding while being heated evenly over the entire mold, and because it is heated in the rotating state, any part is heated without rapid heating, so it is an excellent product. It can be prepared.

As described above, according to the present invention, various designs can be manufactured because they are formed by centrifugation, and the heating is performed while the heating is rotated, thereby uniformly heating to obtain a uniform product.

Claims (2)

Polytechnic crafts (CG-565W or CG-570) for molding, indirect heat 30- composition containing 160g of curing agent, accelerator (DMA), 12g, accelerator (CNR), 12g and accelerator (CMR) in 16,000g Method for producing accessories jewelry, characterized in that the production by heating for 5 minutes to 10 minutes in the range of 100 ℃. In the middle of the upper mold of the silicon mold consisting of the upper mold and the lower mold, an inlet is formed in the center, and a forming groove extending in the guide groove is formed so that the raw material introduced into the inlet is collected into the forming groove along the guide groove by centrifugation. In the known centrifuge, the accessory is characterized in that the molding and curing are performed simultaneously by attaching the heater 6 to the lid 7 of the centrifuge 8 so that heat is applied to the upper part of the rotating mold. Manufacture of jewelry.