JP4229972B2 - Method and apparatus for manufacturing thermosetting resin molded product - Google Patents

Method and apparatus for manufacturing thermosetting resin molded product Download PDF

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JP4229972B2
JP4229972B2 JP2007529563A JP2007529563A JP4229972B2 JP 4229972 B2 JP4229972 B2 JP 4229972B2 JP 2007529563 A JP2007529563 A JP 2007529563A JP 2007529563 A JP2007529563 A JP 2007529563A JP 4229972 B2 JP4229972 B2 JP 4229972B2
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mold
molding
thermosetting resin
molded product
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JPWO2007015565A1 (en
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博史 荒川
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YAMATOKAKO CO., LTD.
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/14—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles in several steps
    • B29C43/146—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles in several steps for making multilayered articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/14—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles in several steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/20—Making multilayered or multicoloured articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/34—Feeding the material to the mould or the compression means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Description

本発明は、熱硬化性樹脂成形品の製造方法及び装置に関し、更に詳しくは凸金型及び凹金型からなる１種類の金型を用いて内外面にグレーズコーティング／又は内外面に絵や模様を付し、更にその外側表面にグレーズコーティング層を付した熱硬化性樹脂成形品を一連の工程で連続的に製造する方法及び装置並びにそれらによって得られる成形品に関する。 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 .

従来より、フェノール樹脂、メラミン樹脂、ユリア樹脂などの熱硬化性樹脂は、圧縮成形法により食器、調理用品、食品保存容器、洗面風呂用品などの成形品の製造に多用されている。熱硬化性樹脂成形材料には、補強のために、通常パルプ材などの補強材が充填されている。   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.

しかしながら、熱硬化性樹脂成形材料の単独成形品は、このパルプ材などの補強材の影響で使用中に汚れが付き易く、そのため、一般的には成形品表層部に、樹脂（例えばメラミン−ホルムアルデヒドなどの樹脂）のみのグレーズをコーティングするグレーズコーティング成形が行われている。   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.

即ち、一般には、例えば典型的な成形工程を示す、図１の工程(1)〜(7)のように、凸金型２上に凹金型３を用いて熱硬化性樹脂１を圧縮成形した成形物（素地）４を保持し（図１の工程(1)及び(2)参照）、その上に、図１の工程(5)及び(6)に示すように、グレーズ５を乗せて成形物の外面６に凹金型３を用いてグレーズ５のコーティング成形を行なう。この場合、成形物７は外面にはグレーズコーティングされているが、その内面８にはグレーズ５のコーティング層は形成されていない。   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.

更に、これらの成形物を特に食器類などとして使用する場合には、その商品価値を高めるために成形物７の表面に絵柄や模様を入れることが多く、この場合には図１の工程(3)〜(4)を追加して、樹脂を含浸し乾燥した絵柄入り特殊印刷紙（フォイル）９を成形し、図１の工程(5)〜(6)で前述のようにその上に光沢低下や汚染等による劣化を防ぐために、凹金型３を用いてグレーズ５のコーティング成形を行うのが一般的である。   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.

上述の如く、陶器やプラスチックスなどの種類を問わず、通常皿などの浅型平面形状の食器類は、料理を盛りつける内面に絵柄などを施し、熱硬化性樹脂成形品の場合、その上にグレーズコーティング成形を行うことにより、このグレーズ層により内面に盛りつけられる料理の付着や汚れを抑えることができる。   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.

しかし、湯呑みやカップ、丼、鉢、椀等の深型立体形状の食器類は、特に熱硬化性樹脂成形品の場合、よく目に触れる外面のみに絵柄を施し、その上にグレーズコーティング成形を行うのが一般的である。従って、食物と接する内面にはグレーズ層は形成されない。このため湯呑みやカップ等は、素地に直接飲み物等に接する為、茶渋やコーヒー等で汚れが付着し内面が汚くなり、光沢も低下していく。また、ナイロンタワシやクレンザー等の固いもので汚れを落とすと、内面の表面に傷が付き余計に汚れが付きやすくなる。また食器類を洗浄するにあたり、食器類に付着した残滓を柔らかくするため、長時間お湯に浸漬する事が多いが、この時に残滓等がグレーズ層の無い面に付着して汚染され易いという問題がある。   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.

かかる問題を解決するために、日本特許第３３９８８１８号公報には、２種類の金型を用いて、先ず成形物の内側表面にグレーズコーティング層を設け、次にこの半成形品を凹型から取出して、凸金型へ移し、そこで成形物の外側表面にグレーズコーティング層を設けることが提案されている。しかし、この方法は、工程の途中で一旦半成形品を取り出して別の金型（凸型）の表面上に移すため、製造工程が非連続的であり、しかも半成形品を金型より取り外し、少なからず放置状態となるため冷却され成形収縮が始まる。この成形収縮は経時により収縮量は変化するので、別の金型（凸型）を製作する際、収縮量を見込んで製作しなければならない。しかし、その見込み量を決定する事が困難なうえ、一定の変形量を確保するためには半製品取り出し後の放置時間をある程度一定にするなど、成形作業上で制約が発生するという問題がある。また、熱硬化性材料は材料の製造ロット毎の成形収縮スピードを一定にすることは困難な材料であることは当業者のよく知る通りであり、収縮の見込み量は経験に依存する部分があり、特に工程操作のコントロールが繁雑になり、不良品が発生しやすくなるという点で未だ改良の余地がある。   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.

従って、本発明の目的は、前述の従来技術に鑑み、使用によって、汚染や光沢低下等に依る劣化を抑えることができる熱硬化性樹脂成形品を、一個の金型を用いて、一連の工程で連続的に製造する方法及び装置を提供することにある。   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.

本発明に従えば、凹金型及び凸金型からなる金型を用いて熱硬化性樹脂を成形硬化せしめることによって熱硬化性樹脂成形品を製造するにあたり、（ａ）金型を閉じてその凸金型上に素地を成形し、（ｂ）その素地の表面に少なくとも１回のグレーズコーティング成形を行い、（ｃ）その成形物を凸金型側より凹金型側（又は凹金型側より凸金型側）に移動させ、そして（ｄ）凹金型側（又は凸金型側）に付着した成形物の表面に少なくとも１回のグレーズコーティング成形を行う一連の工程を連続的に行う熱硬化性樹脂成形品の製造方法であって、前記工程（ｃ）の金型を開く際の成形物の移動を、以下に説明するように、素地の成形の際にキャビティーより流れ出るバリの部分を、金型の一方に固定した移動プレートで載持して、成形物を金型の他方側に移動させることによって行なう製造方法並びにそれによって製造された成形品が提供される。 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.

本発明に従えば、また、凸金型及び凹金型からなる金型、原料熱硬化性樹脂を前記凸金型上又は前記凹金型内に供給する供給装置、熱硬化性樹脂の成形に際して当該金型を開閉する金型の開閉装置、当該金型の加熱及び加圧装置、前記凸金型上又は凹金型内の成形された素地の表面にコーティング成形用のグレーズを供給する供給装置、素地の成形に際して生ずるバリの部分に接してこれを載持することができるように金型に着脱自在に取付けられる移動プレート並びに凸金型及び凹金型と着脱自在に移動プレートを固定する移動プレートの固定装置を含んでなる前記熱硬化性樹脂成形品の製造方法に使用する装置並びにそれによって製造された成形品が提供される。 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.

本発明では、その成形物の表面に、グレーズコーティング成形前に、少なくとも１回のフォイル成形を更に行う工程を設けることができ、そして前記金型の他方側に付着した成形物の表面に、グレーズコーティング成形前に、少なくとも１回のフォイル成形を行うことができる。また前記金型の一方側に付着した成形物の表面にフォイル成形を行う工程及び／又は前記金型の他方側に付着した成形物の表面にフォイル成形を行う工程を更に実施することができ、そして前記金型の一方に付着した成形物の表面にフォイル成形を行う工程及び／又は前記金型の他方に付着した成形物の表面の素地とグレーズ層との間に、フォイル成形を実施することもできる。 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.

本発明に従った熱硬化性樹脂成形品の製造装置は、原料熱硬化性樹脂の供給装置、凹金型及び凸金型からなる金型、金型の開閉装置、加熱及び加圧装置、コーティング成形用のグレーズ供給装置、絵付け成形用のフォイル供給装置、金型に設けられた移動プレート並びに移動プレートの着脱自在な固定装置を含み、これらのうち、以下に説明する、金型に設けた移動プレート及びその固定装置を除けば従来通りとすることができる。   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.

本発明によれば、熱硬化性樹脂を圧縮成形して、食器などの容器、その他の成形品を製造するにあたり、凹金型及び凸金型からなる一つの金型を開閉しながら絵柄などのフォイル成形やグレーズコーティング成形を行うので、同じ金型の凹型及び凸型の上下設定により、成形品の外面及び内面のいずれの面にも絵柄などのフォイル成形やグレーズコーティングを一連の工程で連続的に施すことができる。   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.

本発明に係る熱硬化性樹脂成形品の好ましい製造方法は、図２及び３の工程(1)〜(11)にその一例を示す通りであり、工程(1)及び(2)では図１の場合と同様に凸金型１２に熱硬化性樹脂１１を圧縮成形して成形物を保持する。この成形物１４の外面１６にグレーズ１５を凹金型１３を用いて、従来法と同様にして、例えばメラミン−ホルムアルデヒドなどの樹脂を用いて、グレーズコーティング成形を行い（図２及び３の工程(5)及び(6)参照）、次いで、その成形品１７を図２及び３の工程(9)〜(10)に示す様に、成形物外面１６のグレーズ面を凹金型に付着させ、成形品１７の内面１８にもグレーズ１５のコーティング成形を行う。この様な熱硬化性樹脂成形品１７を得るためには、成形物１４の外面１６にグレーズコーティングを施し、次工程の内面グレーズコーティングに際して凸金型１２及び凹金型１３を開いた時、この半成形品は、工程(9)に示すように、グレーズコーティングを施した側の凹金型１３側に移動させなければならない。   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.

熱硬化性樹脂成形材料を圧縮成型する場合には、当業者のよく知る通り、その金型キャビティーより幾らかの余分な材料が溢れ出るように樹脂投入量を調整する。この余分な材料を供給しないと、成形物に充分な圧力が掛からず、強度や光沢等が不良となり、満足な成形物が得られない。本発明ではこの溢れ出た部分２１（通称バリとよばれる）を用いて、図４の(4)に示すように、このバリ部分２１が片側の金型に取り付けられた移動プレート２２に密着している。なお、以下の記述に於いて、図４のバリの部分２１を作造バリ部と称することとする。   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.

移動プレート２２の両端にはフック手段２３が付いており、図４(1)及び(2)に示す様に凹金型１３及び凸金型１２のいずれかの金型に、移動プレートの固定手段２３、例えばフック手段２３で連結できる構造としてある。この移動プレート２２を固定するフック手段２３が凸金型１２に連結すれば凸金型側、凹金型１３に連結すれば凹金型側に移動プレート２２が移動し、それに伴って成形工程中の成形物も作造バリ部２１が移動プレート２２に載持されて上下する。   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.

前記成形物の移動を保持する作造バリ２１の部分に接する移動プレート２２の形状には、特に規定はなく、成形物の形状により円形や角形、楕円形等或いはその他の形状としてもよい。また、移動プレート２２の作造バリ部２１に接する部分は、成形中の半成形品を移動させることができさえすれば、作造バリ部２１の全周でもよく、または一部分であってもよい。   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.

本発明によれば、図２及び３の工程(9)及び(10)によって、工程(5)及び(6)と同様にして成形品１７の内面１８にグレーズコーティングを施すことができる。   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).

本発明の好ましい態様では、成形品１７の外面及び／又は内面に、図２及び３の工程(3)及び(4)又は／並びに工程(7)及び(8)において、図１について説明したのと同様の方法でフォイル成形して、最終成形品の内面及び／又は外面に絵柄や模様などを入れることができる。   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.

以下、本発明の実施の形態を、メラミン樹脂を用いて湯呑みを、製造する例において、図２及び３に示す工程(1)〜(11)で、内面及び外面に各々絵付けをし、その両面にグレーズコーティング成形を行った態様を例にとって、以下、図面を参照しながら説明する。   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.

図２及び３の工程(1)〜(6)迄は、成形品の外面に絵付けをし、その上にグレーズコーティングを行う工程であり、工程(7)〜(10)は内面に絵付けをして、グレーズコーティングを行う工程を示し、工程(11)は完成品を取り出す工程を示す。   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.

先ず、図２及び３の工程(1)で、凸金型１２と凹金型１３との間にメラミン樹脂成形材料１１を供給し、図２及び３の工程(2)では金型を閉じ成形物の素地１４を成形する。成形条件は、従前通り、使用する熱硬化性樹脂の種類や成形品に従って定まるものであって、特に本発明に固有の要件はない。図２及び３の工程(3)では凸金型１２上の素地成形物の外面１６に樹脂（例えばメラミン樹脂など）を含浸させて乾燥させた絵柄入り印刷紙（フォイル）１９を外部より供給し、工程(4)で金型を閉じフォイルを所定の条件下（例えば１５０〜１８０℃×１５〜６０秒、メラミン樹脂の場合には最も好ましくは１６０℃×３０秒）で融着成形する。図２及び３の工程(5)では金型を開いてフォイル１９が成形された上に、グレーズ１５を供給し、工程(6)ではグレーズコーティング成形を行なう。工程(7)では金型を開いた時に成形物が凹金型１３の方に移動した状態で凸金型１２との間に、上と同様にフォイル１９を供給し、工程(8)で金型を閉じてフォイル成形する。これによって成形物の内面にフォイル１９が融着される。工程(9)ではその内面のフォイル層と凸金型との間にグレーズ１５を供給し、工程(10)で金型をとじて成形物の内面にグレーズコーティング成形を行う。以上の工程により、成形品の内外面にフォイル及びグレースコーティングを施した成形品１７を得ることができる。   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.

この様にして得られた成形品は、従来と比較し、成形品の外面及び内面のそれぞれに絵付けされ、且つ、両面にグレーズコーティングされているので、使用による経時的な汚染や光沢低下等に依る劣化を抑えることができるという利点がある。   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.

次に、図２及び３の工程(3)と(5)の外面へのフォイルの供給及びグレーズの供給に於いての成形品の位置及び工程(7)と(9)の内面へのフォイル供給とグレーズ供給時の成形物の移動について説明する。   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.

この金型は、図４の(1)〜(4)及び図５に示す構造を有し、図４の(1)と(2)及び図５は、金型を閉じた状態の側面図で、それぞれ、各々フック２３が下の金型、つまり凸金型１２、及び上の金型の凹金型１３に掛かっている状態を示し、図４の(3)は凹金型１３と凸金型１２との間の移動プレート２２を示し、図４の(4)では作造バリ部２１の構造を示す。なお、２５は成形品である。金型を閉じた状態でフック２３を凹金型又は凸金型のどちらかのロッド２４に掛けて連結することにより、金型を開いた時に、連結した方に移動プレート２２が上下し、それに伴って成形物が移動するような構成とすることができる。なお、フック２３の数は通常図４(1)及び(2)の反対側の面に更に一つ設けた２個であるがそれ以上設けてもよい。成形物が上下に移動するには、図４の(4)に示す様に、成形物の作造バリ部２１が移動プレート２２に支持される構造であるため、作造バリ部２１は強度が必要となる。   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.

成形工程に於ける移動プレート２２の状態は、図３の側面図(1)〜(11)に示した通りである。即ち先ず、図３の(1)〜(5)は、素地の成形から外面の絵付け及びグレーズコーティング成形まで凸金型１２にフック２３を掛け、成形物が凸金型１２に付いている状態を示す。次いで、図３の(7)〜(10)は、フック２３を凹金型１３に掛け、それに伴って移動プレート２２が凹金型１３側に付き成形物も同様に移動した状態を順次示す。   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.

なお、移動プレートに接する作造バリ部２１の寸法には特に限定はないが、厚さ０．２〜５ｍｍが好ましく、厚さ０．３〜１ｍｍが更に好ましく、そして幅０．３〜５０ｍｍが好ましく、幅１〜２０ｍｍが更に好ましい。   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.

厚さ０．２ｍｍ未満では、成形物を移動させるに充分な強度を有せず、作造バリ部が破損する場合があり、５ｍｍを超えると、作造バリ部を取り除く仕上げ作業が困難となる。また、幅は０．３ｍｍ未満では、成形収縮により、バリ部が移動プレートに掛からない場合が発生し、５０ｍｍを超えると、作造バリ部の除去仕上げが困難となる。   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.

図６及び図７は、それぞれ、２個及び４個の熱硬化性樹脂成形品を同時に製造する成形工程における移動プレート及びその固定方法の一例を示すものである。図６(1)又は図７(1)はその移動プレート３２又は４２の１例を示すもので、図６(2)又は図７(2)は凹金型の組体３１又は４１を示し、図６(3)又は図７(3)は凹金型の組体３１又は４１（内部に素地が成形された半成形品が含まれている）が移動プレート３２又は４２の下側の貫通孔３４又は４４を通して貫通ピン３３又は４３が貫通した状態で金型が開いた状態に固定されている。なお、凸金型組体（図示せず）での成形で得られた半成形品は作造バリの厚さを半成形品を担持するのに十分な寸法及び厚さ（例えば０．３ｍｍ以上）とすることによって凹金型組体３１又は４１に半成形品を一緒に移動させることができる。更に貫通ピン３３又は４３は矢印の方向に、例えばエアーシリンダーを用いて貫通ピンを電気的に制御移動させることにより、凹金型組体３１もしくは４１を上下に自動的に移動させることができる。なお図７の４５はガイドピンを示す。   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.

以上のようにして製造したメラミン樹脂製湯呑みについて、以下の方法で汚染試験を行った。先ず、ステンレス製容器に１４４０ｃｃの水を入れ、これにネスカフェ（商標）８０ｇ、クリープ（商標）４５ｇ及び砂糖５０ｇを入れた。これは通常のコーヒー飲用よりも４〜５倍程度の濃度である。この中に、本発明の実施例の湯呑みと従来通りの比較例の湯呑み（同様にして外面のみに絵付け及びグレーズコーティング）を浸漬し、次いで穴のあいた蓋をし、その穴に水の蒸発を防ぐための環流冷却器を取り付けて６時間、１２時間、２４時間、連続煮沸した。以下の表Ｉに結果を示す。   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.

Figure 0004229972
Figure 0004229972

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。   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”.

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。   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.

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。   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.

本発明は、成形品の内面と外面の両面に絵付けし、また、その上にグレーズコーティングを施す一連の工程を連続的に行って、使用中に於ける汚染や光沢低下等に依る劣化を抑える熱硬化性樹脂成形品及びその製造方法を提供することができるので病院、老人施設、学校、社員食堂などの一度に大量に食器を洗う施設で、洗浄、漂白、消毒保管庫を使用する集団給食用食器として使用するのに有用である。   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.

図１は従来の熱硬化性樹脂成形品を製造する成形工程を説明する図面である。FIG. 1 is a drawing for explaining a molding process for producing a conventional thermosetting resin molded product. 図２は本発明の熱硬化性樹脂成形品を製造する成形工程を説明する図面である。FIG. 2 is a drawing for explaining a molding process for producing the thermosetting resin molded article of the present invention. 図３は本発明の熱硬化性樹脂成形品を製造する成形工程の金型外部の状態を示す説明図である。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. 図４は本発明の半成形品の移動機構を示す説明図である。FIG. 4 is an explanatory view showing the moving mechanism of the semi-molded product of the present invention. 図５は本発明装置の移動プレート及びその固定装置の一例を示す図面である。FIG. 5 is a view showing an example of the moving plate and the fixing device of the apparatus of the present invention. 図６は２個の熱硬化性樹脂成形品を同時に製造する成形工程における移動プレート及びその固定方法の一例を示す図面である。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. 図７は４個の熱硬化性樹脂成形品を同時製造する成形工程における移動プレート及びその固定方法の一例を示す図面である。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.

符号の説明Explanation of symbols

１，１１ 熱硬化性樹脂
２，１２ 凸金型
３，１３ 凹金型
４，１４ 成形物（素地）
５，１５ グレーズ
６，１６ 成形物の外面
７，１７ グレーズコーティング後の成形品
８，１８ 成形品の内面
９，１９ フォイル
２１ 作造バリ部
２２，３２，４２ 移動プレート
２３，３３，４３ 移動プレートの固定手段（フック又は貫通ピン手段）
２４ ロッド
２５ 成形物
３１，４１ 凹金型組体
３４，４４ 貫通孔
４５ ガイドピン 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 (8)

凹金型及び凸金型からなる金型を用いて熱硬化性樹脂を成形硬化せしめることによって熱硬化性樹脂成形品を製造するにあたり、（ａ）金型を閉じてその凸金型上（又は凹金型内）に素地を成形し、（ｂ）その素地の表面に少なくとも１回のグレーズコーティング成形を行い、（ｃ）その成形物を凸金型側より凹金型側（又は凹金型側より凸金型側）に移動させ、そして（ｄ）凹金型側（又は凸金型側）に付着した成形物の表面に少なくとも１回のグレーズコーティング成形を行う一連の工程を連続的に行う熱硬化性樹脂成形品の製造方法であって、前記工程（ｃ）の金型を開く際の成形物の凸金型側より凹金型側（又は凹金型側より凸金型側）への移動を、素地の成形の際にキャビティーより流れ出たバリの部分を、金型に固定した移動プレートで載持して行うことを特徴とする熱硬化性樹脂成形品の製造方法。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) It is moved to the convex mold side) from the side, and (d) a concave mold side (or on the surface of the molded product adhered to the convex mold side) at least one of the series performing glaze coating forming step continuously the A method for producing a thermosetting resin molded article to be performed, which is a concave mold side from a convex mold side (or a convex mold side from a concave mold side) of a molded product when the mold of the step (c) is opened. The burrs that flowed out of the cavities during the molding of the substrate are fixed to the mold. Process for producing a thermosetting resin molded article and performing by diacetic by chromatography and. 前記凸金型側に付着した成形物の表面に、グレーズコーティング成形前に、少なくとも１回のフォイル成形を行う工程を更に有する請求項１に記載の製造方法。The manufacturing method of Claim 1 which further has the process of performing at least 1 foil shaping | molding on the surface of the molding adhering to the said convex metal mold side before glaze coating shaping | molding. 前記凹金型側に付着した成形物の表面に、グレーズコーティング成形前に、少なくとも１回のフォイル成形を行う工程を更に有する請求項１に記載の製造方法。The manufacturing method of Claim 1 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. 前記凸金型側に付着した成形物の表面にフォイル成形を行う工程及び／又は前記凹金型側に付着した成形物の表面にフォイル成形を行う工程を更に有する請求項１に記載の製造方法。The manufacturing method of Claim 1 which further has the process of performing foil shaping | molding on the surface of the molding adhering to the said convex mold side, and / or performing the foil shaping | molding on the surface of the molding adhering to the said concave mold side. . 前記凸金型に付着した成形物の素地とグレーズ層との間にフォイル成形を行う工程及び／又は前記凹金型に付着した成形物の素地とグレーズ層との間に、フォイル成形を行う工程を更に有する請求項１に記載の熱硬化性樹脂成形品の製造方法。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: 成形物を凹金型又は凸金型に移動させるに必要な作造バリの厚さが０．２〜５ｍｍで、且つ、幅が０．３〜５０ｍｍである請求項１に記載の熱硬化性樹脂成形品の製造方法。The thermosetting resin according to claim 1 , 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 of molded products. 請求項１〜６のいずれか１項に記載の方法で得られる熱硬化性樹脂成形品。 The thermosetting resin molded product obtained by the method of any one of Claims 1-6 . 凸金型及び凹金型からなる金型、原料熱硬化性樹脂を前記凸金型上又は前記凹金型内に供給する供給装置、熱硬化性樹脂の成形に際して当該金型を開閉する金型の開閉装置、当該金型の加熱及び加圧装置、前記凸金型上又は凹金型内の成形された素地の表面にコーティング成形用のグレーズを供給する供給装置、素地の成形に際して生ずるバリの部分に接してこれを載持することができるように金型に着脱自在に取付けられる移動プレート並びに凸金型及び凹金型と着脱自在に移動プレートを固定する移動プレートの固定装置を含んでなる請求項１に記載の熱硬化性樹脂成形品の製造方法に使用する装置。 A mold comprising a convex mold and a concave mold , a supply device for supplying raw material thermosetting resin onto or within the convex mold, and a mold for opening and closing the mold when molding the thermosetting resin switchgear, the mold heating and pressure device, the convex mold on or supply device for supplying glaze for coating molded into shaped surface of the green body in the concave metal within mold, burrs caused during molding of the green body of A movable plate that is detachably attached to the mold so as to be able to contact and hold the part, and a convex plate and a movable plate fixing device that detachably fixes the movable plate to the concave mold. The apparatus used for the manufacturing method of the thermosetting resin molded product of Claim 1 .
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