JPH0358810A - Manufacture of artificial stone frame plate - Google Patents

Abstract

PURPOSE:To manufacture an artificial stone frame plate with a smooth surface by forming a retinite powder mixture in a mold for molding an artificial frame plate in two times, applying a cover plate to the mold before complete curing of a secondary retinite powder mixture and turning upside down and curing an assembly of the mold and the cover. CONSTITUTION:Primary and secondary retinite powder mixtures 5 and 7 are filled respectively in a mold 1. At the time of said filling, foams 6, 6' mixed in a retinite powder mixture layer are in the state of sealed in the vicinity of a boundary between a primary retinite powder mixture layer 5 and a secondary retinite powder mixture layer 7, while curing of respective mixture layers 5 and 7 is carried out. A cover plate 8 is applied to the mold 1 before said secondary retinite powder mixture 7 is cured completely, and an assembly of the mold 1 and the cover plate 8 is formed, which is turned upside down and cured. Thus, recessed and projected sections formed by the foams are not formed on the surface, and an artificial stone frame plate with a smooth surface can be manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for conditioning an artificial stone frame plate used in the production of photographic artificial stone ornaments.

BACKGROUND OF THE INVENTION The inventor of the present invention has developed a photographic printing system which has a substantially square trapezoidal shape, a flat bottom wall surface, and a photographic print a! An artificial stone frame board comprising a central top wall surface forming a second floor surface and an edge frame portion surrounding the center top wall surface, the center top wall surface being in a depressed position relative to the top surface of the edge frame portion. Prepare 4 g of the photographic paper in advance, and place the resin coating of the photographic paper, which is formed by coating both the front and back sides of the photographic paper in a sand char shape, on the photographic print mounting surface of the artificial stone frame board. proposed a method of manufacturing an artificial stone ornament with a photograph by integrally fixing it to the artificial stone frame plate using a stone powder-containing resin layer.

Conventionally, the artificial stone frame board used in the above method has a rectangular top surface, a rectangular bottom wall, and a sloped peripheral side wall. A reinforced plastic mold having a predetermined shape for forming the central top wall surface and edge frame of the stone frame board is prepared, and after filling the mold with a resin stone powder mixture, a flat artificial stone frame temporary bottom is prepared. In order to form a wall surface, the top opening of the mold is sealed with a lid plate having a flat lower back surface, and the lower back surface of the lid plate is pressed against the top edge of the peripheral side wall of the mold. It was manufactured by simultaneously heating and curing the filled resin/stone powder composite layer.

Problems that the Invention Attempts to Solve According to this manufacturing method, large air bubbles that have formed in the resin stone powder mixture layer during filling into a mold form uncured or The air bubbles move upward in the semi-cured resin stone powder mixture layer toward the upper surface thereof, and curing is completed when the air bubbles are gathered at the portion that forms the bottom wall surface of the artificial stone frame board.

As a result, after the mold is released, the bottom wall surface of the finished artificial stone frame board is not smooth due to the formation of unevenness due to the air bubbles.
In addition, the appearance was not favorable due to the concentration of air bubbles on the bottom wall surface.

Therefore, an object of the present invention is to easily obtain an artificial stone frame board with air bubbles sealed therein, a smooth surface, and a neat appearance suitable for manufacturing artificial stone ornaments with photographs. An object of the present invention is to provide a method of manufacturing an artificial stone frame board that enables the following.

Means for Solving the Problems In order to achieve the above object, the present invention is characterized by the combination of the following steps: a flat bottom wall surface, a central top wall surface forming a decorative display material mounting surface; The present invention provides a method for manufacturing an artificial stone frame board, comprising: an edge frame portion surrounding the central top wall surface, the center top wall surface being at a position sunken below the top surface of the edge frame portion.

ialm is open and has a bottom wall and a peripheral side wall, the bottom wall has a peripheral edge forming a lowest wall surface, and a position higher than the lowest wall surface of the peripheral edge but lower than the top opening. and a central inner bottom wall surface forming portion, the peripheral side wall having a mold for forming an artificial stone frame plate extending substantially perpendicularly from the peripheral edge of the peripheral edge portion of the bottom wall to the top opening. 'l
(b) After filling the mold with the primary tree trunk stone powder mixture to a predetermined depth that does not reach the top opening of the mold, the filled primary resin stone powder mixture layer is filled. , the bottom part is cured, and the top part is kept in an uncured or semi-cured state, while air bubbles present in the first citrus stone powder mixture layer are moved upward toward the upper surface of the first resin stone powder mixture layer. , fill the secondary resin stone powder mixture on top of the first resin stone powder mixture layer in the mold part number so that it rises to a level exceeding the top opening of the mold; The top opening of the mold is sealed with a lid plate having a flat lower back surface, and the lower back surface of the lid plate is brought into contact with the top edge of the peripheral side wall of the mold to pressurize the mold. and forming a cover plate assembly, and before the secondary resin stone powder mixture is completely cured, inverting the mold and cover plate assembly, and forming the secondary resin stone powder mixture. The air bubbles present in the layer are moved upward toward the vicinity of the interface between the first resin stone powder lλ compound layer and the 1111 second resin stone powder mixture layer, and (') is in the inverted state. When pressurizing the assembly of the mold die and the cover plate, the m edge of the peripheral side wall of the mold is uniformly pressed against the cover plate, and at the same time, the assembly of the mold die and cover plate is pressurized. c) curing and curing said primary and secondary resinous powder mixture; fg) demolding said cured primary and secondary resinous powder mixture from said mold and lid plate; .

According to the present invention, since the above-mentioned steps are combined, air bubbles mixed into each layer of the resin stone powder mixture are At the time of curing, curing is completed in a state where the resin is sealed in the vicinity of the interface between the first resin stone powder mixture layer and the second resin stone powder mixture layer, and an artificial stone frame board is formed. As a result, it is possible to manufacture an artificial stone frame board having a smooth surface without any unevenness caused by air bubbles being formed on the surface.

Embodiment FIG. 7 shows an artificial stone frame plate obtained by the artificial stone frame temporary manufacturing method according to the present invention. The temporary stone frame (20) is substantially in the shape of a truncated quadrangular pyramid, and has a flat bottom wall surface, a central top wall surface (21) forming a photo print mounting surface, and a central top wall surface (2l). It has a green frame part (22) surrounding the periphery. The edge frame portion (22) consists of a flat top (23) and a slope (24), and also has a flat top wall surface (24).
l) is located at a position recessed from the top surface (23) of the front recording frame section (22), and has a protrusion (25) on the periphery and a flat photo print mounting surface (26) on the inside thereof. However, the top surface of the peripheral protrusion (25) is higher than the photographic paper placement surface (26) and lower than the top (23) of the edge frame (22).

The method of manufacturing the temporary artificial stone frame (20) according to the present invention is as described below.

First, a mold for forming the artificial stone frame plate (20) is prepared by processing reinforced plastic (FRP) into a certain shape. FIG. 1 is a vertical cross-sectional view of the mold. The mold (1) has a square opening at the top surface, a square bottom wall (lb), and a peripheral side wall (1a) with a slanted surface. ), the bottom wall (lb) has a peripheral edge (2) forming a flat lowest wall surface, and a top wall located at a higher position than the lowest wall surface of the peripheral edge (2). Square central inner bottom wall forming part (3) located at a lower position than the surface opening
It has The central inner bottom wall surface forming portion (3) further includes a groove portion (3a) surrounding the periphery, and a flat photo print mounting surface formed at a position higher than the bottom surface of the groove portion (3a) inside the groove portion (3a). (3b). Also,
The circumferential wall (Ia) has a flange (1c) on the outer periphery of the top end.

Next, a release agent is applied to the inner surface of the mold (1), and an appropriate amount of resin (4) for attaching a handle to the periphery (2) of the mold (1) is applied. Fill. This process is shown in FIG.

A mold (1) is filled with the primary resin stone powder pentate compound (5) to a height of about 8/10 of the depth of the mold.

This resin stone powder mixture (5) consists of marble stone, calcium carbonate, and an uncelled polyester resin containing a hardening accelerator and a hardening agent. And i
11 Filled primary resin stone B) ? n compound layer (5)
is cured from the bottom, and the upper part is kept in an uncured or semi-cured state, and at this time, the air bubbles present in the first resin stone powder mixture layer are transferred to the upper surface of the first resin stone powder mixture layer (5). Move upwards towards the target. At this point, the first resin stone costume 7J
The C compound layer (5) has been cured to about 60%. This process is shown in FIG.

Thereafter, on the first resin stone powder mixture layer (5) in the mold type CF), a second resin stone powder mixture (
7) is filled so as to protrude beyond the top opening of the mold (1) by a height of about 1/10 of the depth of the mold (1). The second resin stone powder mixture (7) is of the same quality as the first resin stone powder mixture (5). This process is shown in FIG.

As shown in FIG. 5, a rectangular bottom wall (8a) with an opening at the top and a larger area than the opening at the top of the mold (1).
and a peripheral side wall (8b), and a skin-shaped reinforced plastic lid slope (8) with a flat inner bottom surface (8c). '
(+7if shi, inner bottom surface (8c) of said Hff (8)
After applying the 311 type agent, the first and second resin stones are removed. :7:Compound (5). The top opening of the mold (1) filled with (7) is inserted into this Meng plate (8).
The above 274F! ．． (8) Inner bottom surface (
8c) on the top edge (
1c) by contacting and pressurizing the mold (1) and the Meng plate (8).
} form a U solid.

As shown in FIG. 6, before the secondary resin stone powder mixture (7) is completely cured, the mold (+.) and the PH
Invert the JiE (8) assembly. At this time, the air bubbles (6°) present in the secondary resin stone mixture layer (7) are
It tends to rise toward the primary resin stone powder mixture layer (5). However, since most of the primary resin stone powder mixture layer (5) has already hardened from the top to the bottom (in FIG. 6), the air bubbles (6°) are As shown, along with the air bubbles (?) present in the primary resin stone powder mixture layer (5), the primary resin stone powder (λ
Compound layer (5) and secondary resin stone powder l'fl compound layer (7)
remains near the interface with

In this way, the air bubbles (6゛) present in the second resin stone powder mixture layer (7) are removed by combining the first resin stone powder mixture layer (5) and the second citrus stone powder mixture layer (7). 7) After moving upward toward the vicinity of the interface with the mold (1), the assembly of the mold (1) and the cover plate (8) in the inverted state is placed under pressure, and the peripheral side wall (1a) of the mold (1) is moved upward. apical margin (IC)
is evenly pressed against the inner bottom surface (8c) of the lid plate (8), the assembly of the mold (1) and the lid plate (8) is heated appropriately, and the first Next ゛Second resin stone (company) mixture゜layer (5), (7)
harden. Also, during this time, a part (9) of the unhardened second-order 1″ 4-stone stone compound (7) protrudes outward from the periphery of the mold (1) and hardens.

After that, the hardened primary and secondary resin stone powder mixture layer (5). (7) is released from the mold (1) and the top plate (8), and unnecessary portions including the protruding portion (9) are removed. Note that this removal work can be easily performed.

In this way, an artificial stone frame board with air bubbles sealed inside, a smooth surface, and a neat appearance is formed.

As described above, according to the present invention, the mixed proboscis is placed in an artificial stone frame (anti-forming mold) formed into a predetermined shape in two steps at regular intervals. At the same time, after filling the second resin stone powder mixture, before the second resin stone powder mixture is completely hardened, apply a lid plate to the mold, and form a string body on the mold and the lid. However, since the assembly was inverted and hardened, the air bubbles present in the filled resin stone powder mixture were trapped near the boundary between the first and second resin stone powder mixture layers. In this state, the resin stone powder mixture layer is cured to form an artificial stone frame board. Therefore, it is possible to easily provide an artificial stone frame having a smooth surface without unevenness caused by air bubbles, and having a neat appearance suitable for manufacturing artificial stone ornaments with photographs.

[Brief explanation of drawings]

1 to 6 are cross-sectional views of the artificial stone bar according to the present invention in different manufacturing processes. FIG. FIG. (1) 11- (2) (3) 11- (5) -11- (6) (6') (7) (8) 11-= (20) - - 11 (2+) - - (22) - - (26) - - - - Mold peripheral center top wall surface Primary resin stone powder 'IH compound air bubbles Secondary resin stone powder mixture Lid plate Artificial stone frame plate Center deposit wall surface Edge frame photographic print paper storage area

Claims (1)

[Claims] (1) characterized by the combination of the following steps, comprising a flat bottom wall surface, a central top wall surface forming a decorative display material mounting surface, and an edge frame portion surrounding the central top wall surface; A method for manufacturing an artificial stone frame board in which the central top wall surface is sunken below the top surface of the edge frame part; (a) the top surface is open and has a bottom wall and a peripheral side wall, the bottom wall is the lowest wall surface; and a central inner bottom wall forming portion located at a position higher than the lowest wall surface of the peripheral edge portion and lower than the top opening, and the peripheral side wall is located at a position higher than the lowest wall surface of the peripheral edge portion and lower than the top opening. A mold for forming an artificial stone frame plate extending substantially perpendicularly from the peripheral edge of the peripheral edge to the top opening is prepared; (b) a primary resin stone powder mixture is poured into the mold; After filling the filled primary resin stone powder mixture layer to a predetermined depth that does not reach the top opening, the filled primary resin stone powder mixture layer is hardened from the bottom, and the upper part is kept in an unhardened or semi-hardened state. (c) moving the air bubbles present in the resin stone powder mixture layer upward toward the upper surface of the first resin stone powder mixture layer; (d) sealing the top opening of the mold with a lid plate having a flat lower back surface; pressing the lower back surface of the plate into contact with the top edge of the peripheral side wall of the mold to form an assembly of the mold and lid plate; (e) before the second resin stone powder mixture is completely cured; , the assembly of the mold and the lid plate is inverted, and the air bubbles present in the second resin stone powder mixture layer are removed from the boundary between the first resin stone powder mixture layer and the second resin stone powder mixture layer. (f) placing the inverted mold and lid plate assembly under pressure so that the top edge of the mold peripheral side wall is evenly pressed against the lid plate; At the same time, the mold and lid assembly is heated to cure the primary and secondary resinous powder mixtures; (g) the cured primary and secondary resinous powder mixtures are heated; Combination of steps consisting of demolding from said mold and lid plate.