KR100530828B1 - method of manufacturing resin ornament - Google Patents

Abstract

The present invention relates to a method for producing a resin ornament, the step of coating a release agent on the inner surface of a predetermined mold, the step of injecting a transparent resin on the release agent coating layer, the transparent resin layer of the injected transparent resin gel Attaching sequins to the surface of the transparent resin layer during curing, injecting a resin mixture of thermosetting synthetic resin, stone powder and carbon onto the transparent resin layer to form a finishing layer, and forming the molding from the mold after forming the finishing layer. Heat-treating the extraction to produce warpage due to thermal deformation; Pressing by using a pressurizer to horizontally spread the molded article formed by the heat treatment through the heat treatment. According to the manufacturing method of such a resin ornament, it can be produced simply by the main manufacturing process without the auxiliary process to prepare and prepare the conventional anti-bending fixing plate and the mother-of-pearl array plate, which greatly reduces the overall manufacturing process and manufacturing time of the resin ornament The resin ornament may provide thermal effects even when the resin ornament is exposed to solar heat.

Description

Method of manufacturing resin ornament

The present invention relates to a method for manufacturing a resin ornament, and more particularly, to a method for manufacturing a resin ornament to shorten the overall manufacturing process time and to prevent thermal deformation even when exposed to solar heat.

Korean Patent No. 1993-0000110 discloses a method of manufacturing a resin plaque embedded with mother-of-pearl.

A method of manufacturing a resin plaque embedded with mother-of-pearl disclosed in Korean Patent No. 1993-0000110 will be described with reference to FIGS. 1 to 3.

In the manufacturing process of the resin plaque, first, a resin mold 1 is formed on the upper inner surface of which the front unevenness of the plaque is formed, and the mold release agent 2 is applied and dried on the inner surface of the mold. After injection into 4mm thickness and cured for about 10 minutes, and then transparent resin (3B) is injected into the secondary and then the transparent resin 32 is applied to the mother-of-pearl arrangement in which the mother-of-pearl 31 is arranged in advance before the curing is integrated. In addition, by removing the mother earth in which the mother-of-pearl is arranged first, the integrated mother-of-pearl 3 is formed, and the front surface thereof faces downward, and then, the secondary resin-injected transparent resin 3B is seated and bonded before curing.

After the black resin (4A) to be the base is first injected, and the fixing plate (4) for bending prevention is seated and combined, the black resin (4B) is injected and cured secondly to the upper portion to complete the molding (5) to form a groove (center) 51) to combine the pre-made content plate (6) to complete the memorial plaque.

Here, the fixing plate 4 is applied for the purpose of preventing deformation such as bending shrinkage and expansion, which are disadvantages of the resin to be molded.

By the way, in the case of the resin commemorative plaque manufactured by such a manufacturing method, the required parts increase because the fixing plate for preventing warpage 4 and the mother-of-pearl 3 must be manufactured through a separate auxiliary process and applied to the present process of the plaque of plaque, respectively. There is a problem in that the entire manufacturing process of the resin commemorative plaque is lengthened by the need for an auxiliary process for separately preparing the warpage preventing plate 4 and the resin mother-of-pearl 3.

In addition, in the case of the anti-bending fixing plate 4, a resin prepared after injecting the second transparent resin in a state where the primary transparent resin is cured so that shrinkage and warpage due to thermal expansion of the thermosetting unsaturated polyester resin, which is a material of the resin commemorative plaque, does not occur. After embedding the mother-of-pearl, the primary black resin is injected, and the anti-bending fixing plate prepared in advance is then seated, and then the second black resin is injected and cured for a predetermined time. At this time, the first and second transparent resins and the first and second black resins When the curing time is accelerated, it is impossible to prevent the occurrence of warpage of the resin plaque, which is a role of the bending plate for preventing warpage, and the fixing plate 4 is also bent together with the resin plaque, and if it is severe, cracks of the product may occur. There is a problem of becoming a state.

In addition, in order to prevent such product defects, the first and second transparent resins and the first and second black resins need to be controlled slowly so that the curing time of the second transparent resins and the first and second black resins may be adjusted. As described above, the overall manufacturing time for manufacturing the resin plaque as described above becomes very long, resulting in a drop in yield.

In addition, another conventional plaque is disclosed in Korean Laid-Open Patent No. 2000-0051583.

The resin plaque disclosed in Korean Laid-Open Patent No. 2000-0051583 will be described with reference to FIGS. 4 to 5.

Referring to the manufacturing process of the resin plaque, the transparent resin 20 is placed in the mold 10 having the recess 11 and the recess 14 having a stepped portion 13 rounded from the bottom to a predetermined size. Before the transparent resin 20 is cured, the fixing plate 40 to which the decorative piece 30 is attached is placed on the transparent resin 20 at the same time as the bubble removing operation, but slightly smaller than the groove portion 14. The fixed plate 40 is formed, molded together, and secondly, colored or transparent resins 50 and 20 are poured to form a molded body.

On the other hand, the process of attaching the sequins 30 to the fixed plate 40, first printing the pattern for arranging the arrangement of the sequins 30 on the fixed plate 40 in a silk screen method, and then the pre-made sequins It can be attached as it is along the pattern.

By the way, in the method of manufacturing a memorial plaque disclosed in Korean Laid-Open Patent Publication No. 2000-0051583, there is a problem in that the entire manufacturing process is lengthened by requiring an auxiliary process of attaching and preparing a decorative piece in a silk screen method on a separate fixing plate.

The present invention has been made to improve the above problems, and an object thereof is to provide a method of manufacturing a resin ornament that can simplify the manufacturing process.

Still another object of the present invention is to provide a method of manufacturing a resin ornament to prevent the occurrence of warpage of the resin ornament even if the conventional bending prevention fixing plate is omitted.

Still another object of the present invention is to provide a method of manufacturing a resin ornament which can continuously perform a manufacturing process of a resin ornament without an auxiliary process of separately manufacturing a fixing plate and a mother-of-pearl array plate for preventing warpage.

In order to achieve the above object, a method of manufacturing a resin ornament according to the present invention includes the steps of applying a release agent on the inner surface of a predetermined mold; Injecting a transparent resin onto the release agent coating layer; Attaching a decorative piece to the surface of the transparent resin layer when the transparent resin layer formed by the transparent resin is cured in a gel state; Injecting a thermosetting synthetic resin, stone powder, and a resin mixture mixed with carbon to form a finishing layer on the transparent resin layer; Heat-treating the molded product from the mold after the finishing layer is formed to cause warpage due to thermal deformation; Pressing by using a pressurizer to horizontally spread the molded article formed by the heat treatment through the heat treatment.

According to yet another aspect of the present invention, a method for producing a resin ornament includes applying a release agent to an inner surface of a predetermined mold; Forming a primary transparent resin layer by injecting and curing a primary transparent resin on the release agent coating layer; Injecting a second transparent resin onto the first transparent resin layer, embedding a decorative piece to be in contact with the surface of the first transparent resin layer, and curing the second piece to form a second transparent resin layer; Forming a color resin layer by injecting and curing a color resin in which an unsaturated polyester resin and a black pigment are mixed at about 1: 0.01 on the cured secondary transparent resin layer; Injecting a thermosetting synthetic resin, stone powder, and a resin mixture mixed with carbon to form a finishing layer on the colorant resin layer; Heat-treating the molded product from the mold after the finishing layer is formed to cause warpage due to thermal deformation; Pressing by using a pressurizer to horizontally spread the molded article formed by the heat treatment through the heat treatment.

Preferably, the heat treatment of the molding is characterized in that the heating by immersing in boiling water 100 ℃ or more in 1 minute or less.

In addition, the pressurization time of the molding heat-treated in the pressing step is characterized in that performed for about 15 seconds to 20 seconds.

The resin mixture is preferably a mixture of thermosetting synthetic resin, stone powder and carbon in a ratio of 1: 1.25: 0.01.

Hereinafter, a method of manufacturing a resin ornament according to a preferred embodiment of the present invention with reference to the accompanying drawings will be described in more detail.

6 is a flow chart showing a manufacturing process of the resin ornament according to an embodiment of the present invention, Figure 7 is a process diagram schematically showing the formation process of the resin plaque embedded with natural mother-of-pearl in accordance with the manufacturing process of FIG. .

 6 and 7, first, a mold is formed (step 110).

The mold 211 may be formed to have an open groove having a shape corresponding to the outer shape of the ornament to be manufactured, that is, the front and side surfaces.

The mold 211 may be formed by adding stone powder and calcium carbonate as fillers to various materials such as silicone, unsaturated polyester resin, or unsaturated polyester resin.

When the mold 211 is prepared, the release agent 213 is applied into the groove of the mold 211 (step 115). The release agent 213 may be formed by applying a material that is easily separated from the mold 211 after the molding is formed. As an example of such a release agent 213, a brand name "Bonnis" or polyvinyl alcohol (PVA) may be applied.

After the release agent is applied, the transparent resin is first injected into the mold 211 and cured to form a primary transparent resin layer (step 120).

Transparent resins can be applied to a variety of known materials, for example, unsaturated polyester resin.

In addition, to the transparent resin, a hardening agent and an accelerator may be added. As an example of the curing agent, "Mekpo (Methyl Ethyl Ketone Peroxide)" may be applied, and as the accelerator, a metal salt compound containing a cobalt component may be applied.

The addition ratio of the curing agent and the accelerator to the transparent resin may be appropriately applied in accordance with the desired curing time to the extent that it does not cause deformation of the molding to be produced.

The primary transparent resin layer 215 is formed to have an appropriate thickness, for example, about 5 millimeters (mm).

Since the primary resin layer 215 formed through such a curing process is cured while the liquid resin is horizontal, the positional movement of the decoration piece 219 does not occur after the attachment of the decoration piece 219 described later.

Next, the transparent resin is injected into the mold 211 secondly on the first transparent resin layer 215 which is first injected and the surface remains sticky through the curing process (step 125).

At this time, the thickness of the secondary transparent resin layer 217 formed by the transparent resin injected into the secondary is preferably applied to the extent that the decorative piece 219 to be embedded can be locked.

After injecting transparent resin in a second manner, the buried decoration piece 219 is inserted into the secondary transparent resin layer 217 before the resin is cured (step 130). Here, the decorative piece 219 is applied with natural mother-of-pearl.

Preferably, the decorative piece 219 is adhered to the surface of the primary transparent resin layer 215 by using a point where the surface of the primary cured primary transparent resin layer 215 has a sticky adhesiveness.

More preferably, the decorative piece 219 positioned at the buried position is moved back and forth or left and right in close contact with the surface of the primary transparent resin layer 215 so as to suppress bubble generation, and then attached to the desired buried position. . In this case, bubbles are removed during the movement.

Next, when the secondary transparent resin layer 217 is cured, the color resin, that is, the unsaturated polyester resin and the color pigment mixed with a black pigment of about 1: 0.01 is injected, followed by curing the colored resin layer (color resin layer) 221 (Step 135).

Here, the colored resin, that is, the color resin, is a resin applied to be the background color of the pattern arranged by the decorative pieces, and the entire resin becomes black as the unsaturated polyester resin and the black pigment are mixed at about 1: 0.01. It will change to black resin. At this time, the colored resin, the color resin, and the black resin may be referred to as the same resin applied to be the background color of the pattern arranged by the decorative pieces as described above.

In addition, the transparent resin may be applied in place of the color resin of the colored resin.

Then, a resin mixture is injected onto the colored resin layer (colored resin layer) 221 to form a resin mixed layer 223 as a finishing layer (step 140).

In addition, as an example of a resin mixture, what mixed the unsaturated polyester resin, stone powder, and carbon mutually thermosetting synthetic resin in the ratio of 1: 1.25: 0.01 is applied.

After curing of the finishing layer is completed, the molding 230 is taken out from the mold 211.

Next, the extracted molding 230 is heat-treated (step 150).

Preferably, the heat treatment is taken out after soaking in boiling water for 100 minutes or more. More preferably, the heat treatment is taken out after soaking for about 30 seconds in boiling water of 100 ℃ or more. Reference numeral 240 denotes a heating vessel in which water 242 is stored, and 245 denotes a heater.

This heat treatment method is performed to thermally process the molding 230 in advance so that thermal deformation is no longer generated when the molding 230 is used while being exposed to the outside to prevent bending deformation caused by solar heat.

In addition, after the heat treatment step, the molded article 230 is placed on a pressurizer 260 such as a press and the like, and the pressurized state is maintained for about 15 to 20 seconds and then taken out (step 155). Here, the pressurizer 260 is applied with a flat opposing surface, and the pressing force is applied to the extent that a slight deformation may be generated in the horizontal by applying a slight deformation to the molding 230. Preferably, the pressing force is applied at about 500 kg / m ² .

After that, the back surface is polished to complete the natural mother-of-pearl resin plaque applied as a resin ornament (step 160).

Example

After the resin solution, in which the curing agent and the accelerator were added at a ratio of about 1% to the transparent unsaturated polyester resin, was poured into the mold and passed for about 10 minutes at room temperature, the curing agent was added to the transparent unsaturated polyester resin on the cured primary transparent resin layer. Pour the resin solution containing and the promoter in the ratio of about 1% each, and then slide the natural mother-of-pearl on the surface of the first transparent resin layer that maintains the sticky state. After this curing, the black colored resin (colored resin) was poured and cured for about 10 minutes, and then the resin mixture was poured for 10 minutes. Thereafter, the molding was separated from the mold and heat-treated in boiling water for about 30 seconds, and then a pressing force of 500 kg / m ² was applied for about 15 seconds to manufacture a plastic plaque.

Comparative Example

In order to compare the performance of the resin plaque made by the manufacturing process and the resin plaque produced by the conventional method using the fixed plate, the plaque was manufactured by the conventional method by applying the same resin and additives, and then the commemorative plaque was compared with the direct sunlight. Was exposed for about 5 minutes, 10 to 15 minutes, and 30 minutes or more, and the warpage was compared. The results are shown in Table 1 below.

Here, the memorial plaque is slightly heated when exposed to direct sunlight for about 5 minutes, the memorial plaque is warm when exposed for about 10 to 15 minutes, and heated when exposed for 30 minutes or more.

Table 1

When exposed to direct sunlight Resin plaque manufactured according to the present invention Resin commemorative plaque prepared by the method disclosed in Patent No. 1993-0000110 Resin plaque prepared by the method disclosed in Japanese Patent Laid-Open No. 2000-0051583 5 minutes No deformation Slightly deformed Slightly deformed 10 to 15 minutes No deformation The print plate is bent up and down The print plate is bent up and down More than 30 minutes Slightly deformed The plate is warped so much The plate is warped so much

As can be seen from Table 1 above, the conventional resin plaque generated a lot of warpage, whereas the resin plaque undergoing the manufacturing process of the present invention had almost no warpage.

In addition, although the conventional resin plaques in which the warpage occurred were transferred to the shade, the warp state was not restored to the original state, but the resin plaques undergoing the manufacturing process of the present invention were restored by horizontally extending the finely curved portions.

On the other hand, when applying the natural mother-of-pearl is preferably manufactured by the method described above, when applying a mother-of-pearl flat surface unsculpted step 125 may be omitted. Step 135 may also be omitted.

That is, in step 120, the primary transparent resin is injected into the mold 211, and then the decorative piece is attached to the surface of the primary transparent resin layer in the initial curing state in which the primary transparent resin becomes a gel state, and then the resin mixture is poured. After the finishing layer is formed, the post-treatment process (steps 145 to 160) described above may be performed.

As described above, according to the manufacturing method of the resin decoration according to the present invention, the conventional manufacturing process of the resin ornament can be produced simply by the main manufacturing process without the auxiliary process of separately manufacturing the fixing plate and the mother-of-pearl array plate for preventing warpage and It can greatly shorten the manufacturing time, and provides the effect that the thermal deformation can be prevented even if the resin ornament is exposed to solar heat.

1 is a flow diagram showing a conventional resin plaque manufacturing process,

2 is a cross-sectional view of the memorial plaque manufactured through the manufacturing process of FIG.

3 is a cross-sectional view corresponding to the manufacturing process of FIG. 1,

Figure 4 is a flow diagram showing another conventional resin plaque manufacturing process,

5 is a cross-sectional view corresponding to the manufacturing process of FIG. 4,

6 is a flow diagram showing a manufacturing process of the resin ornament according to an embodiment of the present invention,

FIG. 7 is a process diagram schematically showing a process of manufacturing a resin plaque embedded with natural mother-of-pearl according to the manufacturing process of FIG. 6.

<Description of Symbols for Major Parts of Drawings>

211: mold 230: molding

Claims (5)

In the manufacturing method of the resin ornament, end. Applying a release agent to the inner surface of the mold; I. Injecting a transparent resin onto the release agent coating layer; All. Attaching a decorative piece to the surface of the transparent resin layer when the transparent resin layer formed by the transparent resin is cured in a gel state; la. Injecting a thermosetting synthetic resin, stone powder, and a resin mixture mixed with carbon to form a finishing layer on the transparent resin layer; hemp. Heat-treating the molded product from the mold after the finishing layer is formed to cause warpage due to thermal deformation; bar. And pressing by using a press to horizontally spread the molded article formed by the heat treatment through a heat treatment. In the manufacturing method of the resin ornament, end. Applying a release agent to the inner surface of the mold; I. Forming a primary transparent resin layer by injecting and curing a primary transparent resin on the release agent coating layer; All. Injecting a second transparent resin onto the first transparent resin layer, embedding a decorative piece to be in contact with the surface of the first transparent resin layer, and curing the second piece to form a second transparent resin layer; la. Forming a color resin layer by injecting and curing a color resin in which an unsaturated polyester resin and a black pigment are mixed at about 1: 0.01 on the cured secondary transparent resin layer; hemp. Injecting a thermosetting synthetic resin, stone powder, and a resin mixture mixed with carbon to form a finishing layer on the colorant resin layer; bar. Heat-treating the molded product from the mold after the finishing layer is formed to cause warpage due to thermal deformation; four. And pressing by using a press to horizontally spread the molded article formed by the heat treatment through a heat treatment. The method of claim 1 or 2, wherein the heat treatment of the molded product is immersed in boiling water of 100 ° C or more for 1 minute or less and heated. The method of claim 1 or 2, wherein the pressurization time of the molding heat-treated in the pressing step is performed for about 15 seconds to 20 seconds. The method of claim 1 or 2, wherein the resin mixture is a thermosetting synthetic resin, stone powder, and carbon in a ratio of 1: 1.25: 0.01.