JPWO2007015565A1 - Method and apparatus for manufacturing thermosetting resin molded product - Google Patents

Abstract

In manufacturing a thermosetting resin molded product by molding and curing a thermosetting resin using a mold composed of a concave mold and a convex mold, (a) closing the mold and placing the base on the convex mold (B) at least one glaze coating molding is performed on the outer surface of the substrate, (c) the molding is moved from the convex mold side to the concave mold side, and (d) the concave mold side. By continuously performing a series of steps of performing glaze coating molding at least once on the inner surface of the molded product adhered to the surface, it is possible to suppress deterioration due to time-dependent contamination or gloss reduction caused by use. A method and apparatus for continuously producing a thermosetting resin molded article in a series of steps.

Description

  The present invention relates to a method and apparatus for manufacturing a thermosetting resin molded article, and more specifically, glaze coating on the inner and outer surfaces and / or pictures and patterns on the inner and outer surfaces using one type of mold including a convex mold and a concave mold. And a method and apparatus for continuously producing a thermosetting resin molded article having a glaze coating layer on the outer surface thereof in a series of steps.

Conventionally, thermosetting resins such as phenolic resins, melamine resins, and urea resins have been widely used in the manufacture of molded products such as tableware, cooking utensils, food storage containers, and bathrooms by the compression molding method. The thermosetting resin molding material is usually filled with a reinforcing material such as a pulp material for reinforcement.
However, a single molded product of the thermosetting resin molding material is easily contaminated during use due to the influence of the reinforcing material such as pulp material. Therefore, generally, a resin (for example, melamine-formaldehyde) is formed on the surface layer of the molded product. Glaze coating molding is performed to coat only the glaze.
That is, in general, the thermosetting resin 1 is compression-molded using the concave mold 3 on the convex mold 2 as shown in steps (1) to (7) in FIG. The molded product (base) 4 is held (see steps (1) and (2) in FIG. 1), and a glaze 5 is placed thereon as shown in steps (5) and (6) in FIG. The glaze 5 is coated using the concave mold 3 on the outer surface 6 of the molded product. In this case, the molded product 7 is glaze-coated on the outer surface, but the glaze 5 coating layer is not formed on the inner surface 8 thereof.
Further, when these molded products are used particularly as tableware, in many cases, a pattern or pattern is put on the surface of the molded product 7 in order to increase the commercial value. ) To (4) are added to form a special printed paper (foil) 9 impregnated with resin and dried, and then gloss is lowered on it as described above in steps (5) to (6) of FIG. In general, the glaze 5 is coated by using the concave mold 3 in order to prevent deterioration due to contamination and the like.
As mentioned above, regardless of the type of pottery, plastics, etc., shallow flat tableware such as plates usually has a pattern on the inner surface to serve dishes, and in the case of a thermosetting resin molded product, By performing the glaze coating molding, it is possible to suppress the adhesion and dirt of the dish placed on the inner surface by this glaze layer.
However, deep three-dimensional tableware such as cups, cups, bowls, bowls, bowls, etc., especially in the case of thermosetting resin molded products, apply a pattern only to the outer surface that is often seen, and apply glaze coating molding on it. It is common to do it. Therefore, the glaze layer is not formed on the inner surface in contact with food. For this reason, teacups, cups, etc. are in direct contact with drinks, etc., so that dirt adheres to them due to tea astringents, coffee, etc., and the inner surface becomes dirty and the gloss also decreases. Also, if the dirt is removed with a hard object such as nylon scrubber or cleanser, the inner surface will be scratched and the dirt will be more easily attached. In addition, when washing dishes, it is often immersed in hot water for a long time in order to soften the residue attached to the dishes, but at this time, the residue remains attached to the surface without the glaze layer and is easily contaminated. is there.
In order to solve such a problem, Japanese Patent No. 3398818 discloses that two types of molds are used, first a glaze coating layer is provided on the inner surface of the molded product, and then this semi-molded product is taken out from the concave mold. It has been proposed to transfer to a convex mold where a glaze coating layer is provided on the outer surface of the molding. However, in this method, the semi-molded product is taken out once in the middle of the process and transferred to the surface of another mold (convex mold), so the manufacturing process is discontinuous, and the semi-molded product is removed from the mold. Since it is left as it is, it is cooled and molding shrinkage begins. Since the shrinkage of this molding shrinkage changes with time, it must be manufactured in anticipation of the shrinkage when another mold (convex mold) is produced. However, it is difficult to determine the expected amount, and there is a problem that there is a restriction on the molding operation such as leaving the standing time after taking out the semi-finished product to some extent in order to ensure a constant deformation amount. . As those skilled in the art know that a thermosetting material is a material in which it is difficult to keep the molding shrinkage speed constant for each production lot of the material, the expected shrinkage depends on experience. In particular, there is still room for improvement in that control of process operations becomes complicated and defective products are likely to be generated.

Therefore, in view of the above-described conventional technology, the object of the present invention is to use a single mold to form a thermosetting resin molded product that can suppress deterioration due to contamination, gloss reduction, and the like. It is to provide a method and an apparatus for continuous production.
According to the present invention, in manufacturing a thermosetting resin molded product by molding and curing a thermosetting resin using a mold comprising a concave mold and a convex mold, (a) closing the mold and A base is formed on the convex mold, (b) at least one glaze coating is formed on the surface of the base, and (c) the molded product is formed on the concave mold side (or the concave mold side) from the convex mold side. And (d) a series of steps of performing at least one glaze coating molding on the surface of the molded article attached to the concave mold side (or the convex mold side) continuously. A method for producing a thermosetting resin molded article and a molded article produced thereby are provided.
According to the present invention, a raw material thermosetting resin supply device, a mold comprising a concave mold and a convex mold, a mold opening and closing device, a mold heating and pressing device, and a glaze supply for coating molding Device, foil supply device for painting molding, moving plate provided in the mold, a convex mold of the moving plate, a manufacturing apparatus of a thermosetting resin molded product including a fixing device detachable from the concave mold, and A molded article produced thereby is provided.
In a preferred embodiment of the present invention, the movement of the molded product when the mold is opened in the step (c) is performed so that the burr portion flowing out from the cavity during molding of the substrate is removed as described below. It can be carried out by holding the moving plate fixed on one side and moving the molded product to the other side of the mold. In the present invention, the surface of the molding can be further provided with a step of further performing at least one foil molding before the glaze coating molding, and the glaze is applied to the surface of the molding adhered to the other side of the mold. Prior to coating molding, at least one foil molding can be performed. Further, a step of performing foil molding on the surface of the molded article attached to one side of the mold and / or a step of performing foil molding on the surface of the molded article attached to the other side of the mold can be performed. And performing the foil molding between the step of performing the foil molding on the surface of the molding adhered to one of the molds and / or the surface of the molding adhered to the other of the molds and the glaze layer. You can also.
An apparatus for producing a thermosetting resin molded article according to the present invention includes a raw material thermosetting resin supply apparatus, a mold comprising a concave mold and a convex mold, a mold opening / closing apparatus, a heating and pressing apparatus, and a coating. Includes a glaze supply device for molding, a foil supply device for painting, a moving plate provided in the mold, and a detachable fixing device for the moving plate, and among these, provided in the mold described below Except for the moving plate and its fixing device, it can be conventional.
According to the present invention, when a thermosetting resin is compression-molded to produce a container such as tableware or other molded product, a pattern such as a pattern is opened and closed while opening and closing one mold composed of a concave mold and a convex mold. Since foil molding and glaze coating molding are performed, pattern molding and glaze coating are continuously performed in a series of processes on both the outer and inner surfaces of the molded product by setting the concave and convex of the same mold. Can be applied.

FIG. 1 is a drawing for explaining a molding process for producing a conventional thermosetting resin molded product.
FIG. 2 is a drawing for explaining a molding process for producing the thermosetting resin molded article of the present invention.
FIG. 3 is an explanatory view showing a state outside the mold in the molding process for producing the thermosetting resin molded article of the present invention.
FIG. 4 is an explanatory view showing the moving mechanism of the semi-molded product of the present invention.
FIG. 5 is a view showing an example of the moving plate and the fixing device of the apparatus of the present invention.
FIG. 6 is a view showing an example of a moving plate and its fixing method in a molding process for simultaneously manufacturing two thermosetting resin molded products.
FIG. 7 is a view showing an example of a moving plate and a fixing method thereof in a molding process in which four thermosetting resin molded products are simultaneously manufactured.

Explanation of symbols

1,11 Thermosetting resin 2,12 Convex mold 3,13 Concave mold 4,14 Molded article (base)
5,15 Glaze 6,16 Outer surface of molded product 7,17 Molded product after glaze coating 8,18 Inner surface of molded product 9,19 Foil 21 Fabrication burr section 22,32,42 Moving plate 23,33,43 Moving plate Fixing means (hook or penetrating pin means)
24 Rod 25 Molded product 31, 41 Concave die assembly 34, 44 Through hole 45 Guide pin

A preferred method for producing a thermosetting resin molded article according to the present invention is as shown in steps (1) to (11) in FIGS. 2 and 3, and steps (1) and (2) in FIG. As in the case, the thermosetting resin 11 is compression-molded on the convex mold 12 to hold the molded product. The glaze 15 is formed on the outer surface 16 of the molded product 14 using the concave mold 13 and the glaze coating molding is performed using a resin such as melamine-formaldehyde in the same manner as in the conventional method (steps of FIGS. 2 and 3 ( 5) and (6)), and then, as shown in steps (9) to (10) of FIGS. 2 and 3, the molded article 17 is molded by attaching the glaze surface of the molded product outer surface 16 to the concave mold. The glaze 15 is coated on the inner surface 18 of the product 17. In order to obtain such a thermosetting resin molded article 17, when the outer surface 16 of the molding 14 is subjected to glaze coating, and the convex mold 12 and the concave mold 13 are opened during the inner glaze coating in the next process, As shown in step (9), the semi-molded product must be moved to the concave mold 13 side on which the glaze coating is applied.
When a thermosetting resin molding material is compression molded, as is well known to those skilled in the art, the amount of resin input is adjusted so that some excess material overflows from the mold cavity. If this extra material is not supplied, sufficient pressure will not be applied to the molded product, resulting in poor strength and gloss, and a satisfactory molded product cannot be obtained. In the present invention, this overflowed portion 21 (called a burr) is used so that the burr portion 21 comes into close contact with the moving plate 22 attached to the mold on one side as shown in FIG. ing. In the following description, the burr portion 21 shown in FIG.
Hook means 23 are attached to both ends of the moving plate 22, and as shown in FIGS. 4 (1) and (2), the moving plate fixing means is attached to one of the concave mold 13 and the convex mold 12. 23, for example, a structure that can be connected by hook means 23. If the hook means 23 for fixing the moving plate 22 is connected to the convex mold 12, the moving plate 22 moves to the convex mold side, and if connected to the concave mold 13, the moving plate 22 moves to the concave mold side. The fabricated burr 21 is also moved up and down by the movable plate 22.
The shape of the moving plate 22 in contact with the portion of the fabrication burr 21 that holds the movement of the molded product is not particularly limited, and may be a circle, a square, an ellipse, or other shapes depending on the shape of the molded product. Further, the part of the moving plate 22 that is in contact with the fabrication burr 21 may be the entire circumference or a part of the fabrication burr 21 as long as the half-molded product being molded can be moved.
According to the present invention, glaze coating can be applied to the inner surface 18 of the molded article 17 by the steps (9) and (10) of FIGS. 2 and 3 in the same manner as in the steps (5) and (6).
In the preferred embodiment of the present invention, FIG. 1 has been described in steps (3) and (4) or / and steps (7) and (8) of FIGS. 2 and 3 on the outer surface and / or inner surface of the molded article 17. The pattern can be formed on the inner surface and / or the outer surface of the final molded product by foil molding in the same manner as described above.

表Ｉの汚染の数値は、着色なしを“０”とし、褐色に着色したものを“１０”、また、同時に光沢も検査し、変化のないものを“０”とし、光沢が著しく低下したものを“１０”として段階的に目視で評価した。
以上の様に、比較例の内面の汚染度合いが非常に大きく、実施例の汚染は、成形品の内面及び外面ともに、汚染度合いが小さい。また、実施例の光沢は内面、外面とも低下は見られなかったのに対し、比較例の内面は光沢が低下した。
この様に、実施例の如く製造した湯飲みなどは、コーヒーの汚染防止に非常にメリットがあり、お茶や調味料など他の食品にも同様の効果があるものと考えられる。また、光沢低下を抑える効果もある。光沢が低下したものは、洗剤や漂白剤では回復しないため、光沢低下の防止は食器類の価値を維持するのに非常に大切である。Hereinafter, in the example of manufacturing a hot water bottle using a melamine resin in the embodiment of the present invention, in steps (1) to (11) shown in FIGS. Hereinafter, an example in which glaze coating molding is performed on both sides will be described with reference to the drawings.
Steps (1) to (6) in FIGS. 2 and 3 are steps of painting on the outer surface of the molded product and performing glaze coating thereon, and steps (7) to (10) are painting on the inner surface. The step of performing glaze coating is shown, and step (11) shows the step of taking out the finished product.
First, in step (1) of FIGS. 2 and 3, the melamine resin molding material 11 is supplied between the convex mold 12 and the concave mold 13, and in step (2) of FIGS. 2 and 3, the mold is closed and molded. A material base 14 is formed. The molding conditions are determined according to the type of the thermosetting resin to be used and the molded product as before, and there are no requirements specific to the present invention. In the step (3) of FIGS. 2 and 3, a printed paper (foil) 19 with a picture made by impregnating and drying a resin (for example, melamine resin) on the outer surface 16 of the green molded body on the convex mold 12 is supplied from the outside. In step (4), the mold is closed, and the foil is fusion-molded under predetermined conditions (for example, 150 to 180 ° C. × 15 to 60 seconds, most preferably 160 ° C. × 30 seconds in the case of melamine resin). 2 and 3, the mold 19 is opened to form the foil 19 and the glaze 15 is supplied. In step (6), glaze coating is performed. In the step (7), when the mold is opened, the foil 19 is supplied to the convex mold 12 in the state that the molding is moved toward the concave mold 13 in the same manner as above. Close the mold and form the foil. As a result, the foil 19 is fused to the inner surface of the molded product. In step (9), glaze 15 is supplied between the foil layer on the inner surface and the convex mold, and in step (10), the mold is closed to perform glaze coating on the inner surface of the molded product. Through the above steps, a molded product 17 in which a foil and a grace coating are applied to the inner and outer surfaces of the molded product can be obtained.
The molded product thus obtained is painted on both the outer surface and the inner surface of the molded product and glaze-coated on both sides, so that contamination over time and gloss reduction with use, etc. There is an advantage that the deterioration due to can be suppressed.
Next, the supply of foil to the outer surface of steps (3) and (5) in FIGS. 2 and 3 and the position of the molded product in the supply of glaze and the supply of foil to the inner surface of steps (7) and (9) The movement of the molded product when supplying the glaze will be described.
This mold has the structure shown in FIGS. 4 (1) to (4) and FIG. 5, and FIGS. 4 (1), (2) and 5 are side views of the mold closed. FIG. 4 shows a state in which the hooks 23 are respectively hooked on the lower mold, that is, the convex mold 12 and the concave mold 13 of the upper mold. FIG. 4 (3) shows the concave mold 13 and the convex mold. A moving plate 22 between the mold 12 and the mold 12 is shown. In FIG. Reference numeral 25 denotes a molded product. By hooking the hook 23 on the rod 24 of either the concave mold or the convex mold with the mold closed, the movable plate 22 moves up and down in the connected direction when the mold is opened. It can be set as the structure which a molded article moves with it. The number of hooks 23 is usually two, one on the opposite side of FIGS. 4 (1) and 4 (2), but more may be provided. In order for the molded product to move up and down, as shown in FIG. 4 (4), the molded burr 21 of the molded product is supported by the moving plate 22, so the molded burr 21 needs to be strong. Become.
The state of the movable plate 22 in the molding process is as shown in the side views (1) to (11) of FIG. That is, first, (1) to (5) in FIG. 3 show a state in which the hook 23 is hung on the convex mold 12 from the molding of the substrate to the painting of the outer surface and the glaze coating molding, and the molded product is attached to the convex mold 12. Indicates. Next, (7) to (10) in FIG. 3 sequentially show the state in which the hook 23 is hooked on the concave mold 13 and the movable plate 22 is attached to the concave mold 13 side and the molded product is similarly moved.
In addition, the dimension of the construction burr | flash part 21 which touches a movement plate is although it does not specifically limit, Thickness 0.2-5mm is preferable, Thickness 0.3-1mm is still more preferable, and width 0.3-50mm is preferable More preferably, the width is 1 to 20 mm.
If the thickness is less than 0.2 mm, the molded burr is not strong enough to move the molded product, and the created burr may be damaged. If the thickness exceeds 5 mm, the finishing operation for removing the created burr becomes difficult. If the width is less than 0.3 mm, the burr portion may not be applied to the moving plate due to molding shrinkage. If the width exceeds 50 mm, it is difficult to finish the removal of the fabricated burr portion.
6 and 7 show an example of a moving plate and a fixing method thereof in a molding process in which two and four thermosetting resin molded products are simultaneously manufactured, respectively. FIG. 6 (1) or FIG. 7 (1) shows an example of the moving plate 32 or 42, FIG. 6 (2) or FIG. 7 (2) shows a concave mold assembly 31 or 41, 6 (3) or 7 (3) shows a concave mold assembly 31 or 41 (which includes a semi-molded product with a green body formed therein) below the moving plate 32 or 42. The mold is fixed in an open state with the penetrating pins 33 or 43 penetrating through 34 or 44. In addition, the semi-molded product obtained by molding with a convex mold assembly (not shown) has a thickness and a thickness sufficient to support the semi-molded product (eg, 0.3 mm or more). By doing so, the semi-molded product can be moved together to the concave mold assembly 31 or 41. Further, the through die 33 or 43 can automatically move the concave die assembly 31 or 41 up and down by electrically controlling and moving the through pin in the direction of the arrow, for example, using an air cylinder. Reference numeral 45 in FIG. 7 denotes a guide pin.
Contamination tests were conducted on the melamine resin hot water smelt produced as described above by the following method. First, 1440 cc of water was put into a stainless steel container, and 80 g of Nescafe (trademark), 45 g of Creep (trademark) and 50 g of sugar were placed therein. This is about 4 to 5 times the concentration of normal coffee drinking. In this, the cup of the embodiment of the present invention and the cup of the comparative example of the conventional example (similarly, painting and glaze coating only on the outer surface) are dipped, and then a hole is covered, and water is evaporated in the hole. Attach a reflux cooler to prevent this, and boil continuously for 6, 12 and 24 hours. The results are shown in Table 1 below.

Contamination values in Table I are "0" for no coloration and "10" for brown coloration. At the same time, the gloss is also inspected and "0" for no change. Was visually evaluated stepwise as “10”.
As described above, the degree of contamination on the inner surface of the comparative example is very large, and the degree of contamination on the inner surface and the outer surface of the molded product is small for the contamination of the example. In addition, the gloss of the example did not decrease on the inner surface and the outer surface, whereas the gloss of the inner surface of the comparative example decreased.
In this way, the hot water drinks manufactured as in the examples are very advantageous for preventing coffee contamination, and other foods such as tea and seasonings are considered to have the same effect. In addition, there is an effect of suppressing a reduction in gloss. Deteriorated gloss cannot be recovered with detergents or bleaches, so prevention of loss of gloss is very important for maintaining the value of tableware.

  In the present invention, the inner surface and the outer surface of the molded product are painted on both sides, and a series of processes for applying glaze coating thereon is continuously performed, so that deterioration due to contamination, gloss reduction, etc. during use is achieved. A group that uses washing, bleaching, and disinfecting storage in facilities that wash a large amount of food at once, such as hospitals, elderly facilities, schools, and employee cafeterias, because it can provide thermosetting resin molded products and methods for manufacturing them. Useful as a tableware for lunch.

The present invention relates to a method and apparatus for manufacturing a thermosetting resin molded article, and more specifically, glaze coating on the inner and outer surfaces and / or pictures and patterns on the inner and outer surfaces using one type of mold including a convex mold and a concave mold. And a method and apparatus for continuously producing a thermosetting resin molded article having a glaze coating layer on the outer surface thereof in a series of steps, and a molded article obtained thereby .

  Conventionally, thermosetting resins such as phenolic resin, melamine resin, and urea resin have been widely used in the manufacture of molded products such as tableware, cooking utensils, food storage containers, and toiletries by the compression molding method. The thermosetting resin molding material is usually filled with a reinforcing material such as a pulp material for reinforcement.

  However, a single molded product of a thermosetting resin molding material is easily contaminated during use due to the influence of a reinforcing material such as a pulp material. Therefore, generally, a resin (for example, melamine-formaldehyde) is formed on the surface layer of the molded product. Glaze coating molding is performed to coat only the glaze.

  That is, in general, the thermosetting resin 1 is compression-molded using the concave mold 3 on the convex mold 2 as shown in steps (1) to (7) of FIG. Hold the molded article (substrate) 4 (see steps (1) and (2) in FIG. 1), and place glaze 5 on it as shown in steps (5) and (6) in FIG. The glaze 5 is coated using the concave mold 3 on the outer surface 6 of the molded product. In this case, the molded product 7 is glaze-coated on the outer surface, but the glaze 5 coating layer is not formed on the inner surface 8 thereof.

  Further, when these molded products are used particularly as tableware, a pattern or pattern is often put on the surface of the molded product 7 in order to increase the commercial value. In this case, the process (3 in FIG. ) To (4) are added, and special printed paper (foil) 9 with a resin impregnated and dried is molded, and gloss is lowered on it as described above in steps (5) to (6) of FIG. In general, the glaze 5 is coated by using the concave mold 3 in order to prevent deterioration due to contamination and the like.

  As mentioned above, regardless of the type of pottery, plastics, etc., shallow flat tableware such as plates usually has a pattern on the inner surface to serve dishes, and in the case of a thermosetting resin molded product, By performing the glaze coating molding, it is possible to suppress the adhesion and dirt of the dish placed on the inner surface by this glaze layer.

  However, deep three-dimensional tableware such as cups, cups, bowls, bowls, bowls, etc., especially in the case of thermosetting resin molded products, apply a pattern only to the outer surface that is often seen, and apply glaze coating molding on it. It is common to do it. Therefore, the glaze layer is not formed on the inner surface in contact with food. For this reason, teacups, cups, etc. are in direct contact with drinks, etc., so that dirt adheres to them due to tea astringents, coffee, etc., and the inner surface becomes dirty and the gloss also decreases. Also, if the dirt is removed with a hard object such as nylon scrubber or cleanser, the inner surface will be scratched and the dirt will be more easily attached. Also, when washing dishes, in order to soften the residue attached to the dishes, it is often immersed in hot water for a long time, but at this time, the residue remains attached to the surface without the glaze layer and is easily contaminated. is there.

  In order to solve such a problem, Japanese Patent No. 3398818 discloses that two types of molds are used, first a glaze coating layer is provided on the inner surface of the molded product, and then this semi-molded product is taken out from the concave mold. It has been proposed to transfer to a convex mold where a glaze coating layer is provided on the outer surface of the molding. However, in this method, the semi-molded product is taken out once in the middle of the process and transferred to the surface of another mold (convex mold), so the manufacturing process is discontinuous, and the semi-molded product is removed from the mold. Since it is left as it is, it is cooled and molding shrinkage begins. Since the shrinkage of this molding shrinkage changes with time, it must be manufactured in anticipation of the shrinkage when another mold (convex mold) is produced. However, it is difficult to determine the expected amount, and there is a problem that there is a restriction on the molding operation such as leaving the standing time after taking out the semi-finished product to some extent in order to ensure a constant deformation amount. . As those skilled in the art know that a thermosetting material is a material in which it is difficult to keep the molding shrinkage speed constant for each production lot of the material, the expected shrinkage depends on experience. In particular, there is still room for improvement in that control of process operations becomes complicated and defective products are easily generated.

  Therefore, in view of the above-described conventional technology, the object of the present invention is to use a single mold to form a thermosetting resin molded product that can suppress deterioration due to contamination, gloss reduction, and the like. It is to provide a method and an apparatus for continuous production.

According to the present invention, in manufacturing a thermosetting resin molded product by molding and curing a thermosetting resin using a mold comprising a concave mold and a convex mold, (a) closing the mold and A base is formed on the convex mold, (b) at least one glaze coating is formed on the surface of the base, and (c) the molded product is formed on the concave mold side (or the concave mold side) from the convex mold side. And (d) a series of steps of performing at least one glaze coating molding on the surface of the molded article attached to the concave mold side (or the convex mold side) continuously. A method for producing a thermosetting resin molded product , wherein the movement of the molded product when the mold of the step (c) is opened is described below. Place the part with a moving plate fixed to one side of the mold, Production process carried out by moving the other side of the mold and the molded article produced thereby is provided.

According to the present invention, a mold composed of a convex mold and a concave mold , a supply device for supplying a raw material thermosetting resin onto or into the convex mold, and upon molding of the thermosetting resin mold opening and closing device for opening and closing the mold, heating the mold and the pressure device, supply device for supplying glaze for coating molded to shaped surfaces of the matrix within the convex mold or on a concave mold , A moving plate that is detachably attached to the mold so as to be able to contact and hold the burr portion that occurs when forming the substrate, and a movement that detachably fixes the moving plate to the convex mold and the concave mold apparatus and used in the production method of the thermosetting resin molded article comprising a fixation device plate molded article thereby produced is provided.

In the present invention, the surface of the molding can be further provided with a step of further performing at least one foil molding before the glaze coating molding, and the glaze is applied to the surface of the molding adhered to the other side of the mold. Prior to coating molding, at least one foil molding can be performed. Further, a step of performing foil molding on the surface of the molded article attached to one side of the mold and / or a step of performing foil molding on the surface of the molded article attached to the other side of the mold can be performed. And performing the foil molding between the step of performing the foil molding on the surface of the molding adhered to one of the molds and / or the surface of the molding adhered to the other of the molds and the glaze layer. You can also.

  An apparatus for producing a thermosetting resin molded article according to the present invention includes a raw material thermosetting resin supply apparatus, a mold comprising a concave mold and a convex mold, a mold opening / closing apparatus, a heating and pressing apparatus, and a coating. Includes a glaze supply device for molding, a foil supply device for painting, a moving plate provided in the mold, and a detachable fixing device for the moving plate, and among these, provided in the mold described below Except for the moving plate and its fixing device, it can be conventional.

  According to the present invention, when a thermosetting resin is compression-molded to produce a container such as tableware or other molded product, a pattern such as a pattern is opened and closed while opening and closing one mold composed of a concave mold and a convex mold. Since foil molding and glaze coating molding are performed, pattern molding and glaze coating are continuously performed in a series of processes on both the outer and inner surfaces of the molded product by setting the concave and convex of the same mold. Can be applied.

  A preferred method for producing a thermosetting resin molded product according to the present invention is as shown in steps (1) to (11) of FIGS. 2 and 3, and in steps (1) and (2) of FIG. As in the case, the thermosetting resin 11 is compression-molded on the convex mold 12 to hold the molded product. The glaze 15 is formed on the outer surface 16 of the molded product 14 by using the concave mold 13 and the glaze coating molding is performed using a resin such as melamine-formaldehyde in the same manner as in the conventional method (steps of FIGS. 2 and 3). Next, as shown in steps (9) to (10) of FIGS. 2 and 3, the glaze surface of the molded product outer surface 16 is attached to the concave mold to form the molded product 17 as shown in steps (9) to (10) of FIGS. The glaze 15 is coated on the inner surface 18 of the product 17. In order to obtain such a thermosetting resin molded article 17, when the outer surface 16 of the molding 14 is subjected to glaze coating, and the convex mold 12 and the concave mold 13 are opened during the inner glaze coating in the next process, As shown in step (9), the semi-molded product must be moved to the concave mold 13 side on which the glaze coating is applied.

  When a thermosetting resin molding material is compression molded, as is well known to those skilled in the art, the amount of resin input is adjusted so that some excess material overflows from the mold cavity. If this extra material is not supplied, sufficient pressure will not be applied to the molded product, resulting in poor strength and gloss, and a satisfactory molded product cannot be obtained. In the present invention, this overflowed portion 21 (called “burr”) is used so that the burr portion 21 comes into close contact with the moving plate 22 attached to the mold on one side, as shown in FIG. ing. In the following description, the burr portion 21 shown in FIG.

  Hook means 23 are attached to both ends of the moving plate 22, and as shown in FIGS. 4 (1) and (2), the moving plate fixing means is attached to one of the concave mold 13 and the convex mold 12. 23, for example, a structure that can be connected by hook means 23. If the hook means 23 for fixing the moving plate 22 is connected to the convex mold 12, the moving plate 22 moves to the convex mold side, and if connected to the concave mold 13, the moving plate 22 moves to the concave mold side. The fabricated burr 21 is also moved up and down by the movable plate 22.

  The shape of the moving plate 22 in contact with the portion of the fabrication burr 21 that holds the movement of the molded product is not particularly limited, and may be a circle, a square, an ellipse, or other shapes depending on the shape of the molded product. Further, the part of the moving plate 22 that is in contact with the fabrication burr 21 may be the entire circumference or a part of the fabrication burr 21 as long as the half-molded product being molded can be moved.

  According to the present invention, glaze coating can be applied to the inner surface 18 of the molded article 17 by the steps (9) and (10) of FIGS. 2 and 3 in the same manner as in the steps (5) and (6).

  In the preferred embodiment of the present invention, FIG. 1 has been described in steps (3) and (4) or / and steps (7) and (8) of FIGS. 2 and 3 on the outer surface and / or inner surface of the molded article 17. The pattern can be formed on the inner surface and / or the outer surface of the final molded product by foil molding in the same manner as described above.

  Hereinafter, in the example of manufacturing a hot water smelt using melamine resin in the embodiment of the present invention, in steps (1) to (11) shown in FIGS. Hereinafter, an example in which glaze coating molding is performed on both sides will be described with reference to the drawings.

  Steps (1) to (6) in FIGS. 2 and 3 are steps for painting the outer surface of the molded product and performing glaze coating thereon, and steps (7) to (10) are for painting the inner surface. Step (11) shows a step of taking out the finished product.

  First, in step (1) of FIGS. 2 and 3, the melamine resin molding material 11 is supplied between the convex mold 12 and the concave mold 13, and in step (2) of FIGS. 2 and 3, the mold is closed and molded. A material base 14 is formed. The molding conditions are determined according to the type of the thermosetting resin to be used and the molded product as before, and there are no requirements specific to the present invention. In the step (3) of FIGS. 2 and 3, a printed paper (foil) 19 with a picture made by impregnating a resin (eg, melamine resin) on the outer surface 16 of the green molded body on the convex mold 12 and drying is supplied from the outside. In step (4), the mold is closed, and the foil is fusion-molded under predetermined conditions (for example, 150 to 180 ° C. × 15 to 60 seconds, most preferably 160 ° C. × 30 seconds in the case of melamine resin). 2 and 3, the mold 19 is opened to form the foil 19, and the glaze 15 is supplied. In step (6), glaze coating is performed. In the step (7), when the mold is opened, the foil 19 is supplied to the convex mold 12 in the state that the molded product has moved toward the concave mold 13 as in the above. Close the mold and form the foil. As a result, the foil 19 is fused to the inner surface of the molded product. In step (9), glaze 15 is supplied between the foil layer on the inner surface and the convex mold, and in step (10), the mold is closed to perform glaze coating on the inner surface of the molded product. Through the above steps, a molded product 17 in which a foil and a grace coating are applied to the inner and outer surfaces of the molded product can be obtained.

  The molded product thus obtained is painted on both the outer surface and the inner surface of the molded product and glaze-coated on both sides, so that contamination over time and gloss reduction with use, etc. There is an advantage that the deterioration due to can be suppressed.

  Next, supply of foil to the outer surface of steps (3) and (5) in FIGS. 2 and 3 and position of the molded product in supplying glaze and supply of foil to the inner surface of steps (7) and (9) The movement of the molded product when supplying the glaze will be described.

  This mold has the structure shown in FIGS. 4 (1) to (4) and FIG. 5. FIGS. 4 (1), (2) and FIG. 5 are side views of the mold closed. FIG. 4 shows a state in which the hooks 23 are respectively hooked on the lower mold, that is, the convex mold 12 and the concave mold 13 of the upper mold, and FIG. 4 (3) shows the concave mold 13 and the convex mold. The moving plate 22 between the molds 12 is shown, and (4) in FIG. Reference numeral 25 denotes a molded product. By hooking the hook 23 on the rod 24 of either the concave mold or the convex mold with the mold closed, the movable plate 22 moves up and down in the connected direction when the mold is opened. It can be set as the structure which a molded article moves with it. The number of hooks 23 is usually two, one on the opposite side of FIGS. 4 (1) and 4 (2), but more may be provided. In order for the molded product to move up and down, as shown in FIG. 4 (4), since the molding burr 21 of the molded product is supported by the moving plate 22, the molding burr 21 needs to be strong. Become.

  The state of the moving plate 22 in the molding process is as shown in the side views (1) to (11) of FIG. That is, first, (1) to (5) in FIG. 3 shows a state in which the hook 23 is hung on the convex mold 12 from molding of the substrate to painting of the outer surface and glaze coating molding, and the molding is attached to the convex mold 12. Indicates. Next, (7) to (10) in FIG. 3 sequentially show the state in which the hook 23 is hooked on the concave mold 13 and the movable plate 22 is attached to the concave mold 13 side and the molded product is similarly moved.

  In addition, the dimension of the construction burr | flash part 21 which touches a movement plate is although it does not specifically limit, Thickness 0.2-5mm is preferable, Thickness 0.3-1mm is still more preferable, and width 0.3-50mm is preferable More preferably, the width is 1 to 20 mm.

  If the thickness is less than 0.2 mm, the molded burr is not strong enough to move the molded product, and the created burr may be damaged. If the thickness exceeds 5 mm, the finishing operation for removing the created burr becomes difficult. If the width is less than 0.3 mm, the burr portion may not be applied to the moving plate due to molding shrinkage. If the width exceeds 50 mm, it is difficult to finish the removal of the fabricated burr portion.

  6 and 7 show an example of a moving plate and a fixing method thereof in a molding process in which two and four thermosetting resin molded products are simultaneously manufactured, respectively. FIG. 6 (1) or FIG. 7 (1) shows an example of the moving plate 32 or 42. FIG. 6 (2) or FIG. 7 (2) shows a concave die assembly 31 or 41. 6 (3) or 7 (3) shows a concave die assembly 31 or 41 (including a semi-molded product in which a green body is formed) is a through hole under the moving plate 32 or 42. The mold is fixed in an open state with the penetrating pins 33 or 43 penetrating through 34 or 44. In addition, the semi-molded product obtained by molding with a convex mold assembly (not shown) has a thickness and a thickness sufficient to support the semi-molded product (eg, 0.3 mm or more). By doing so, the semi-molded product can be moved together to the concave mold assembly 31 or 41. Further, the through die 33 or 43 can automatically move the concave die assembly 31 or 41 up and down by electrically controlling and moving the through pin in the direction of the arrow, for example, using an air cylinder. Reference numeral 45 in FIG. 7 denotes a guide pin.

  Contamination tests were conducted on the melamine resin hot water smelt produced as described above by the following method. First, 1440 cc of water was put into a stainless steel container, and 80 g of Nescafe (trademark), 45 g of Creep (trademark) and 50 g of sugar were placed therein. This is about 4 to 5 times the concentration of normal coffee drinking. In this, the cup of the embodiment of the present invention and the cup of the comparative example of the conventional example (similarly, painting and glaze coating only on the outer surface) are dipped, and then a hole is covered, and water is evaporated in the hole. Attach a reflux cooler to prevent this, and boil continuously for 6, 12 and 24 hours. The results are shown in Table I below.

  Contamination values in Table I are "0" for no coloration and "10" for brown coloration. At the same time, the gloss is also inspected and "0" for no change. Was visually evaluated stepwise as “10”.

  As described above, the degree of contamination on the inner surface of the comparative example is very large, and the degree of contamination on the inner surface and the outer surface of the molded product is small for the contamination of the example. In addition, the gloss of the example did not decrease on the inner surface and the outer surface, whereas the gloss of the inner surface of the comparative example decreased.

  In this way, the hot water drinks manufactured as in the examples are very advantageous for preventing coffee contamination, and other foods such as tea and seasonings are considered to have the same effect. In addition, there is an effect of suppressing a reduction in gloss. Deteriorated gloss cannot be recovered with detergents or bleaches, so prevention of loss of gloss is very important for maintaining the value of tableware.

  In the present invention, the inner surface and the outer surface of the molded product are painted on both sides, and a series of processes for applying glaze coating thereon is continuously performed, so that deterioration due to contamination, gloss reduction, etc. during use is achieved. A group that uses washing, bleaching, and disinfecting storage in facilities that wash a large amount of food at once, such as hospitals, elderly facilities, schools, and employee cafeterias, because it can provide thermosetting resin molded products and methods for manufacturing them. Useful as a tableware for lunch.

FIG. 1 is a drawing for explaining a molding process for producing a conventional thermosetting resin molded product. FIG. 2 is a drawing for explaining a molding process for producing the thermosetting resin molded article of the present invention. FIG. 3 is an explanatory view showing a state outside the mold in the molding process for producing the thermosetting resin molded article of the present invention. FIG. 4 is an explanatory view showing the moving mechanism of the semi-molded product of the present invention. FIG. 5 is a view showing an example of the moving plate and the fixing device of the apparatus of the present invention. FIG. 6 is a view showing an example of a moving plate and its fixing method in a molding process for simultaneously manufacturing two thermosetting resin molded products. FIG. 7 is a view showing an example of a moving plate and its fixing method in a molding process in which four thermosetting resin molded products are manufactured simultaneously.

Explanation of symbols

1,11 Thermosetting resin 2,12 Convex mold 3,13 Concave mold 4,14 Molded article (base)
5,15 Glaze 6,16 Outer surface of molded product 7,17 Molded product after glaze coating 8,18 Inner surface of molded product 9,19 Foil 21 Fabrication burr section 22,32,42 Moving plate 23,33,43 Moving plate Fixing means (hook or penetrating pin means)
24 Rod 25 Molded product 31, 41 Concave die assembly 34, 44 Through hole 45 Guide pin

Claims (9)

In manufacturing a thermosetting resin molded product by molding and curing a thermosetting resin using a mold composed of a concave mold and a convex mold, (a) closing the mold and on the convex mold (or (B) The base is molded into (in the concave mold), (b) at least one glaze coating molding is performed on the surface of the base, and (c) the molded product from the convex mold side to the concave mold side (or concave mold) A series of steps of performing at least one glaze coating molding on the surface of the molded article attached to the concave mold side (or the convex mold side). A method for producing a thermosetting resin molded product, comprising: When the mold of the step (c) is opened, the movement of the molded product from the convex mold side to the concave mold side (or from the concave mold side to the convex mold side) is from the cavity during the molding of the substrate. The manufacturing method according to claim 1, wherein the burr portion that has flowed out is mounted on a moving plate fixed to a mold. The manufacturing method of Claim 1 or 2 which further has the process of performing the foil shaping | molding at least once before the glaze coating shaping | molding on the surface of the molding adhering to the said convex metal mold | die side. The manufacturing method of Claim 1 or 2 which further has the process of performing at least 1 foil shaping | molding on the surface of the molding adhering to the said concave mold side before glaze coating shaping | molding. 3. The method according to claim 1, further comprising a step of performing foil molding on the surface of the molded article attached to the convex mold side and / or a step of performing foil molding on the surface of the molded article attached to the concave mold side. Production method. A step of forming a foil between the base of the molding attached to the convex mold and the glaze layer and / or a step of forming a foil between the base of the molding attached to the concave mold and the glaze layer The method for producing a thermosetting resin molded article according to claim 1, further comprising: The thermosetting according to claim 1 or 2, wherein the thickness of the construction burr necessary for moving the molded product to the concave mold or the convex mold is 0.2 to 5 mm and the width is 0.3 to 50 mm. Manufacturing method for functional resin molded products. The thermosetting resin molded product obtained by the method of any one of Claims 1-7. Raw material thermosetting resin supply device, mold made of concave mold and convex mold, mold opening and closing device, mold heating and pressurizing device, glaze supply device for coating molding, foil for painting molding An apparatus for manufacturing a thermosetting resin molded article, comprising a supply device, a moving plate provided in a mold, and a fixing device for a moving plate that is detachable from the convex mold and the concave mold.

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