JP4785876B2 - Method and apparatus for producing double-sided decorated thermosetting resin molded product - Google Patents

Description

  The present invention relates to a method and apparatus for producing a double-sided decorated thermosetting resin molded article, and more specifically, a set of one (or two) convex molds and two (or one) concave molds. A two-sided decorated thermosetting resin molded product with different inner and outer colors using molding materials of different colors, with painting or / and coating on both sides The present invention relates to a method and an apparatus for continuously manufacturing 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 (eg, 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 6 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 rice bowls, 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 then apply glaze coating on it. It is common to perform molding. 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, in Patent Document 1, using two types of molds, 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, since the semi-molded product is once taken out and transferred onto the surface of another mold (convex mold) in the middle of the process, the manufacturing process is discontinuous, and the semi-molded product is removed from the mold. It is removed and left to stand for a while, so it is cooled and molding shrinkage begins. Since this shrinkage amount changes with time, when another mold (convex mold) is manufactured, the shrinkage amount must be estimated. 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.

The present inventors have found that came before, caused by use, a thermosetting resin molded article that can suppress deterioration due to pollution and reduction in gloss or the like, using a single mold, continuously in a series of steps We have succeeded in developing a method and apparatus for manufacturing (see Patent Document 2). This method is, for example, as shown in steps (1) to (11) of FIG. 2, and in steps (1) and (2), a thermosetting resin is applied to the convex mold 12 as in FIG. 11 is compression-molded to hold the molded product. The glaze 15 is formed on the outer surface 16 of the molded product by using the concave mold 13 and using a resin such as melamine-formaldehyde, for example, in the same manner as in the conventional method (see step (5) and FIG. 2). Next, as shown in steps (9) to (10) of FIG. 2, the glaze surface of the molded product outer surface 16 is attached to the concave mold, so that the molded product 17 is attached to the inner surface 18 of the molded product 17. Also, glaze 15 coating is performed. 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. Hook means 23 are attached to both ends of the moving plate 22, and as shown in FIGS. 3 (1) and (2), the moving plate fixing means is attached to either the concave mold 13 or 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 molded product is also carried on the moving plate 22 and moves up and down. An example of the hook means is shown in FIG. According to this method, glaze coating can be applied to the inner surface 18 of the molded article 17 by the steps (9) and (10) of FIG. 2 in the same manner as in the steps (5) and (6). Further, the outer surface and / or the inner surface of the molded product 17 is formed into a foil in the same manner as described with reference to FIG. 1 in steps (3) and (4) or / and steps (7) and (8) of FIG. Thus, a pattern or a pattern can be put on the inner surface and / or the outer surface of the final molded product.

Japanese Patent No. 3398818 International Publication WO 2007/015565 AI

Accordingly, an object of the present invention is to provide a series of steps in which a molded product in which (a) arbitrary painting and (b) glaze coating are applied to both the inner and outer surfaces of a two-color molded product of thermosetting resins of different colors. It is to provide a method and an apparatus that can be manufactured continuously.

According to the present invention, (i) one convex mold and two concave molds or (ii) a pair of molds composed of one concave mold and two convex molds and a moving plate combined therewith A series of molded products with different inner and outer colors using molding materials of different colors, with (a) an optional picture and (b) glaze coating on both sides A method of continuously manufacturing in the molding process of
(I) When using a set of molds consisting of one convex mold and two concave molds, (a) First, the first molding material is formed by combining the convex mold and the first concave mold. shaping the green body, then concave mold, by moving the plate, together with the intrinsic base moldings, after moving, applied to its inner surface (b) optional pattern and (ii) the glaze coating in order the primary molded article of the inside of the molded article molded Te, and (b) a second molding of a color different from the first matrix by combining a convex mold and a second concave mold, which includes a primary molded article or the matrix material is molded on the outside of the inner primary molded product, then its outer surface (b) optional pattern and (ii) the glaze coating applied in order to shape the outer moldings, or (ii) When using a pair of molds consisting of one concave mold and two convex molds, (c) first the concave mold and the first mold Molding the green body of the first molding material in combination of convex mold, then its outer surface (b) optional pattern and (ii) subjected to a glaze coating in order the outside of the molded article primary molded article the molded, and (d) a concave mold, the moving plate, with outer primary molded product, after moving, a combination of concave mold which includes a primary molded product and the second convex mold convex metal A base of a second molding material of a color different from that of the first base is molded on the inside of the outer primary molded product, and then (a) an optional pattern and (b) glaze coating on the inner surface A method for producing a double-sided decorated thermosetting resin molded product is provided, in which a series of steps of molding the inside of the molded product by sequentially performing the above is performed.

According to the present invention, it is also possible to supply two types of raw material thermosetting resin molding materials of different colors: (i) one convex mold and two concave molds or (ii) two convex molds and one A set of two concave molds, mold opening and closing device, two convex or concave mold moving device, mold heating and pressurizing device, glaze supply device for glaze coating molding, optional Using different color molding materials comprising a foil supply device for painting molding, a moving plate provided in the mold, and a fixing device for the moving plate for moving the base molded product detachable from the convex mold and the concave mold. An apparatus for producing a thermosetting resin molded product having different inner and outer colors is provided.

An apparatus for producing a thermosetting resin molded product according to the present invention includes a raw material thermosetting resin molding material supply device, a mold including a concave mold and a convex mold, a mold opening / closing device, and a heating and pressurizing device. , Including a glaze supply device for coating molding, a foil supply device for painting molding , a moving plate for moving a primary molded product provided in a mold, and a detachable fixing device for the moving plate, of which: Except for the movable plate and its fixing device provided in the mold, the conventional method can be used.

According to the present invention, when a thermosetting resin having a different color is compression-molded to produce a container such as tableware or other molded article, one (or two) concave molds and two (or one) Can be molded while opening and closing a pair of convex molds, and foil molding and glaze coating molding can be performed on both sides. Depending on the upper and lower settings of the convex mold, (a) an arbitrary pattern and (b) glaze coating can be continuously applied in a series of steps on both the outer and inner surfaces of molded products of different colors. it can.

The preferable manufacturing method of the double-sided decorating thermosetting resin molded product which concerns on this invention is demonstrated below with reference to drawings.
The present invention uses (i) one convex mold and two concave molds, or (ii) two convex molds and one concave mold, and uses different thermosetting molding materials (for example, commercially available). Melamine resin, phenolic resin, urea resin, and other amino resins), which are molded products with different colors on the inside and outside, and (b) optional painting and (b) glaze on both sides The present invention relates to a production method capable of forming a coated molded article in a series of molding steps. Such a method and an apparatus used therefor are different indentation molds in the mold structure of the present invention by a slide molding method using a slide press machine or a rotary molding method using a rotary press machine, which is a conventional molding method. Or, make a convex mold, slide or rotate, and use different colored molding materials to make the inner and outer colors different, and paint, coat, or paint on both sides. And a molded product treated with the coating can be molded in a series of molding steps.

  The molding of the double-sided decorated thermosetting resin of the present invention is basically described in Patent Document 2 according to the prior invention of the present inventors, except that the set of molds (i) or (ii) is used. The molding process described above, more specifically, using the conventional thermosetting resin material molding process, molding method and molding apparatus shown in FIGS. 2 to 4 attached to the present specification, and FIG. It can be easily understood by those skilled in the art.

However, the mold of the present invention uses (i) a combination of one convex mold and two concave molds, or (ii) a combination of one concave mold and two convex molds. If it is a combination of one convex mold and two concave molds, a molded product with optional painting and (b) glaze coating is molded inside by primary molding, and the concave mold is slid and moved. or replacing the mold by rotational movement around axis in the vertical direction, such as a rotary table, optional painting (a) on the outside in a different color thermosetting resin molding material remains the primary molded product is held And (b) a molded product in which the inner and outer colors are changed in the secondary molding to process the glaze coating , and (b) optional painting and (b) the glaze coating are processed on both sides. The product can be formed in a series of forming steps. For example, the slide movement of the mold or the rotation movement around the vertical direction such as the rotary table is performed by, for example, the slide movement using the moving table of the slide press machine, the rotary movement using the rotary table of the rotary press machine, or the slide mechanism. The present invention can be carried out in the manner of slide movement using a provided mold and rotational movement using a mold provided with a rotation mechanism using a rotary table.

On the other hand, in the case of using a combination of one concave mold and two convex molds, a primary molded product with (a) optional painting and (b) glaze coating on the outside by primary molding . Molding, changing the mold by sliding movement or rotating movement of the convex mold, while keeping the primary molded product inside (b) optional painting and ( (B) A molded product in which the inner and outer colors have been changed by secondary molding to treat the glaze coating , and on both sides (a) optional painting and (b) a molded product treated with the glaze coating. It can be molded in a series of molding processes. The thermosetting materials having different colors may be blended with different colorants in the same kind of thermosetting material, or conversely, different colorants may be blended in different thermosetting materials.

A double-sided decorated thermosetting resin according to the first aspect of the present invention using one convex mold 32 and two concave molds, that is, an inner molding concave mold 33-1 and an outer molding concave mold 33-2. A method for producing a molded product will be described with reference to FIGS. As for the second embodiment using one concave mold and two convex molds, first, an outer base molded product (primary molded product) is molded, and (b) optional outer painting molding and (b) After the outer glaze molding is performed, molding is performed in the same manner as in the first aspect described below except that the convex mold is replaced to perform the inner base molded product, optional inner painting molding, and inner glaze molding. can do.

First, the inner base molding material 31 (thermosetting resin A) is applied to the convex mold 32 shown in FIG. 5 according to a conventional method, and the inner and outer molding concave molds 33-1 and 33-2 (these molds are The inner base molded product 34 is formed by combining with a mold 33-1 of a suitable means (for example, a movable table or a rotary table). At this time, the hook 35 is fixed to the upper mold (that is, the concave mold 33-1). Next, as shown in FIG. 6, an optional inner pattern 36 is applied to the convex mold 32 with the inner base molded product (primary molded product) 34 fixed to the upper mold (concave mold 33-1) with a hook. Then, as shown in FIG. 6, the inner painting of the molded product is performed by the convex mold 32 and the concave mold 33-1.

Next, as shown in FIG. 7, an optional inner glaze coating material 37 is applied to the convex mold 32 while the inner base molded product 34 to which the pattern 36 is applied is fixed to the concave mold 33-1 by the hook 35. As shown in FIG. 7, the convex mold 32 and the concave mold 33-1 are combined to apply glaze coating to the inside of the pattern 36. Here, by replacing the hook 35 with the lower mold (convex mold 32), an inner molded finished product 38 (that is, an inner base molded product / pattern / glaze coating ) is completed on the convex mold 32 as shown in FIG. To do.

  In the next stage, as shown in FIG. 9, the concave mold combined with the convex mold 32 is slid or rotated as described above from the concave mold 33-1 to the outer molding concave mold 33-2. The outer base molding material 39 (thermosetting resin B having a different color from the thermosetting resin A) is supplied onto the inner molded finished product 38 formed on the mold 32, and is projected as shown in FIG. The outer base molded product 40 is molded outside the inner molded finished product 38 (that is, outside the inner molded base layer) by combining the mold 32 and the concave mold 33-2.

Next, as shown in FIG. 10, the molded product 32 is arbitrarily applied to the outside of the outer pattern 41 and the outer base molded product of the molded product while being fixed to the lower mold (convex mold 32). And the concave mold 33-2 are combined, and a pattern is applied to the outside of the molded product. Further, as shown in FIG. 11, the outer glaze 42 is applied to the outside of the intermediate molded product to provide the convex mold 32 and the concave mold. A glaze coating is applied to the outside of the molded product by combining 33-2. Thus, as shown in FIG. 12, a double-sided decorative molded product 43 having different inner and outer colors can be molded in a series of steps without removing the mold. In addition, as shown in FIG. 12, the concave molds 32-1 and 32-2 are slid or rotated and returned to the state of FIG. 5 to prepare for the next cycle.

  The pattern used in the present invention is impregnated with, for example, a printed paper (foil) with a pattern impregnated with a resin (such as a melamine resin) or dried with paper without a pattern impregnated with a resin (such as a melamine resin) and dried. Foil by sandwiching unprinted paper or placing it on one side, and glaze coating, for example, at least one selected from melamine resin, guanamine resin and melamine / guanamine co-condensation resin, curing catalyst and mold release This refers to coating with a melamine resin coating composition prepared with a material such as an agent. Note that these terms are frequently used in the industry and are equivalent to these in the present invention.

According to the present invention, a molded product having different colors on the inner surface and outer surface of the molded product using molding materials of different colors, wherein (a) optional painting and (b) glaze coating are applied to both surfaces. Since a series of applied processes can be performed continuously to provide a double-sided decorated thermosetting resin molded product and a method for producing the same, (1) a higher-grade molded product as a product with reduced manufacturing costs (2) It is possible to provide a more highly stain-resistant product by using a material with a stain-resistant color on the inside and a normal material on the outside. (3) Glaze coating material with different performance Can be used to apply glaze coating on the inside and outside (for example, use a glaze coating material that is resistant to contamination on the inside and a weather-resistant glaze coating material on the outside) (4) Using a glaze coating material with a high water-repellent effect or high hydrophilic effect, and applying the glaze coating on the inside and outside, it can be used to improve drainage when stacking dishes. be able to.

It is drawing explaining the shaping | molding process which manufactures the conventional thermosetting resin molded product. It is explanatory drawing which shows the state outside the metal mold | die of the shaping | molding process which manufactures the thermosetting resin molded product of our prior invention. It is explanatory drawing which shows the moving mechanism of the semi-molded product of our prior invention. It is drawing which shows an example (hook means) of the moving plate of the prior invention apparatus of the present inventors, and its fixing device. It is drawing which shows the inner side base shaping | molding step of the continuous shaping | molding process which concerns on the 1st aspect of this invention. It is drawing which shows the inner side painting shaping | molding step of the continuous shaping | molding process which concerns on the 1st aspect of this invention. It is drawing which shows the inner side glaze shaping | molding step of the continuous shaping | molding process which concerns on the 1st aspect of this invention. It is drawing which shows the inner side shaping | molding completion stage of the continuous shaping | molding process which concerns on the 1st aspect of this invention. It is drawing which shows the outer side base shaping | molding step of the continuous shaping | molding process which concerns on the 1st aspect of this invention. It is drawing which shows the outer side painting forming step of the continuous shaping | molding process which concerns on the 1st aspect of this invention. It is drawing which shows the outer side glaze shaping | molding step of the continuous shaping | molding process which concerns on the 1st aspect of this invention. It is drawing which shows the shaping | molding completion stage of the continuous shaping | molding process which concerns on the 1st aspect of this invention.

1,11 Thermosetting resin 2,12 Convex die 3,13 Concave die 4 Molded product (base)
5,15 Glaze 6,16 Outer surface of molded article 7,17 Molded article after glaze coating 8,18 Inner surface of molded article 9,19 Foil 22 Moving plate 23 Moving plate fixing means (hook means)
24 Rod 25 Molded product 31 Inner base molding material (thermosetting resin A)
32 Convex mold 33-1 Concave mold for inner molding 33-2 Concave mold for outer molding 34 Inner base molded product 35 Hook means 36 Inner pattern 37 Inner glaze 38 Inner molded finished product 39 Outer base molding material 40 Outer base molding Product 41 Outer design 42 Outer glaze 43 Double-sided decorative molded product

Claims (2)

Molding of different colors using (i) one convex mold and two concave molds or (ii) a set of molds consisting of one concave mold and two convex molds and a moving plate combined therewith A molded product with different inner and outer colors using materials, and (a) a thermosetting resin molded product with an arbitrary pattern and (b) glaze coating on both sides in a series of molding steps A method of manufacturing,
(I) When using a set of molds consisting of one convex mold and two concave molds, (a) First, the first molding material is formed by combining the convex mold and the first concave mold. shaping the green body, then concave mold, by moving the plate, together with the intrinsic base moldings, after moving, applied to its inner surface (b) optional pattern and (ii) the glaze coating in order the primary molded article of the inside of the molded article molded Te, and (b) a second molding of a color different from the first matrix by combining a convex mold and a second concave mold, which includes a primary molded article or the matrix material is molded on the outside of the inner primary molded product, then its outer surface (b) optional pattern and (ii) the glaze coating applied in order to shape the outer moldings, or (ii) When using a pair of molds consisting of one concave mold and two convex molds, (c) first the concave mold and the first mold Molding the green body of the first molding material in combination of convex mold, then its outer surface (b) optional pattern and (ii) subjected to a glaze coating in order the outside of the molded article primary molded article the molded, and (d) a concave mold, the moving plate, with outer primary molded product, after moving, a combination of concave mold which includes a primary molded product and the second convex mold convex metal A base of a second molding material of a color different from that of the first base is molded on the inside of the outer primary molded product, and then (a) an optional pattern and (b) glaze coating on the inner surface A method for producing a double-sided decorated thermosetting resin molded product, characterized in that a series of steps for molding the inside of the molded product by sequentially applying the steps are performed. Two types of raw material thermosetting resin molding material feeding devices of different colors, (i) one set of one convex mold and two concave molds or (ii) two convex molds and one concave mold Mold, mold opening and closing device, two convex or concave mold moving device, mold heating and pressurizing device, glaze supply device for glaze coating molding, foil supply device for optional painting molding Heat of different inner and outer colors using different colored molding materials comprising a moving plate for moving the primary molded product provided in the mold and a fixing device for the movable mold and the convex mold and the concave mold. Production equipment for curable resin molded products.

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