JP4974723B2 - Manufacturing method of foam heat-resistant container - Google Patents

Manufacturing method of foam heat-resistant container Download PDF

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JP4974723B2
JP4974723B2 JP2007070664A JP2007070664A JP4974723B2 JP 4974723 B2 JP4974723 B2 JP 4974723B2 JP 2007070664 A JP2007070664 A JP 2007070664A JP 2007070664 A JP2007070664 A JP 2007070664A JP 4974723 B2 JP4974723 B2 JP 4974723B2
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sheet material
crystalline resin
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JP2008229956A (en
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完治 吉村
俊広 高井
和司 林
貞興 中井
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Asano Laboratories Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a foamed heat-resistant container capable of obtaining a container, which has heat resistance, heat insulating properties, the glossiness of appearance and good outward appearance and is excellent in commodity value enabling the direct heating of housed food using an electronic oven. <P>SOLUTION: When the fitting molding gap (a) between a recessed mold 11 and a protruded mold 12 is set to the thickness of a crystalline resin foamed sheet material A used in molding and the crystalline resin foamed sheet material A is held from both surfaces thereof by the heated recessed mold 11 and the heated protruded mold 12 to be press-molded, the protruded mold 12 is set to temperature same to or higher than that of the recessed mold 11 and the crystalline resin foamed sheet material A is sucked by the suction ports 19 and 20 provided to the uneven mold 11, 12 to be closely brought into contact with both surfaces of the uneven mold 11, 12 to be crystallized. After molding, the protruded mold 12 stopping suction is released precedently while the recessed mold 11 is continuously held to a suction state to cool the surface of the molded product and suction is stopped to release the molded product from the recessed mold 11. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

この発明は、結晶性樹脂発泡シート材を材料に用い、内面に耐熱性があり、中層が断熱性を保ち、外面が耐熱性と光沢性を備えた発泡耐熱容器の製造方法に関する。   The present invention relates to a method for producing a foamed heat-resistant container using a crystalline resin foam sheet material as a material, having heat resistance on the inner surface, a middle layer maintaining heat insulation, and an outer surface having heat resistance and gloss.

例えば、納豆等をスーパーや小売店で販売するために用いられている容器は、発泡スチロールのような非結晶性の樹脂発泡シート材を用い、加熱した凹型と凸型でプレス成形することにより製造され、一般的にこのような容器は、角形となる容器本体の上部周辺に設けたフランジの一辺に、可曲部を介してフランジの外形と同じ平面的な大きさを有する蓋部材を一体成形した構造を有し、容器本体の上部開口を閉じる場合は、蓋部材を折り曲げて容器本体のフランジ上に重ね、この蓋部材の一面側に突設した周枠部を容器本体の上部開口に嵌め合わせるようになっている。   For example, containers used for selling natto etc. at supermarkets and retail stores are manufactured by using a non-crystalline resin foam sheet material such as polystyrene foam and press-molding with a heated concave mold and convex mold. In general, in such a container, a lid member having the same planar size as the outer shape of the flange is integrally formed on one side of the flange provided around the upper portion of the container body having a square shape through a bendable portion. When the upper opening of the container body is closed, the lid member is folded and stacked on the flange of the container body, and the peripheral frame portion projecting on one surface side of the lid member is fitted to the upper opening of the container body. It is like that.

従来、上記のような、樹脂発泡シート材を用いた容器の製造方法は、樹脂発泡シート材のガラス転移温度よりも低い温度で加熱した凹型と凸型を用い、所定大きさに裁断した樹脂発泡シート材を凹型と凸型で所定時間プレスして形付けすることで成形するようにしている。   Conventionally, the manufacturing method of the container using the resin foam sheet material as described above is a resin foam cut into a predetermined size using a concave mold and a convex mold heated at a temperature lower than the glass transition temperature of the resin foam sheet material. The sheet material is formed by pressing and molding it with a concave mold and a convex mold for a predetermined time.

ところで、上記のような従来の成形方法は、樹脂発泡シート材を加熱加圧して所定の形状に成形するだけあるので、発泡スチロールのような樹脂発泡シート材が持つ断熱性のある容器となるが、樹脂発泡シート材そのままの特性であるので外観的に艶が無く見栄えに劣るという問題がある。   By the way, the conventional molding method as described above is merely a heat-pressed resin foam sheet material and molded into a predetermined shape, so that it becomes a heat-insulating container possessed by a resin foam sheet material such as polystyrene foam. Since the resin foam sheet material is a characteristic as it is, there is a problem that it is not glossy in appearance and inferior in appearance.

また、上記のような容器に入れた食品を、電子レンジで直接加熱して食したいという消費者の要望が増えているが、非結晶性樹脂発泡シート材そのものは耐熱性に劣り、収納した食品を電子レンジで直接加熱することに対応できないのが現状である。   In addition, there is an increasing demand for consumers who want to eat foods in containers as described above by directly heating them in a microwave oven, but the amorphous resin foam sheet material itself is inferior in heat resistance. The present situation is that it is not possible to cope with direct heating in a microwave oven.

そこで、この発明の課題は、容器の材料に結晶性樹脂発泡シート材を用い、耐熱性と断熱性及び外観の光沢性を備え、見た目の見栄えがよく、収納した食品を電子レンジで直接加熱が可能となる商品価値の優れた容器を得ることができる発泡耐熱容器の製造方法を提供することにある。   Therefore, the object of the present invention is to use a crystalline resin foam sheet material as a container material, which has heat resistance, heat insulation and gloss of appearance, has a good appearance, and can directly heat the stored food in a microwave oven. An object of the present invention is to provide a method for producing a foamed heat-resistant container capable of obtaining a container having an excellent commercial value.

上記のような課題を解決するため、この発明は、凹型と凸型の嵌り合い成形隙間を、成形に用いる結晶性樹脂発泡シート材の厚み以下に設定し、加熱させた凹型と凸型で結晶性樹脂発泡シート材を両面から挟んでプレス成形した際、凹型と凸型に設けた吸引口で結晶性樹脂発泡シート材を吸引して凹型と凸型の両面に密着させることにより結晶性樹脂発泡シート材の結晶化を行い、成形後に、吸引を停止させた凸型を先行で離型させて凹型は吸引状態を継続することで成形品の表面を冷やし、この後、吸引を停止して凹型から成形品を離型する構成を採用したものである。   In order to solve the above-mentioned problems, the present invention sets the concave and convex fitting molding gaps to be equal to or less than the thickness of the crystalline resin foamed sheet material used for molding, and heats the concave and convex crystals. When the resin foam sheet is press-molded from both sides, the resin foam is obtained by sucking the crystal resin foam sheet material through the suction ports provided in the concave and convex molds and bringing them into close contact with both concave and convex molds. After crystallization of the sheet material, after the molding, the convex mold whose suction is stopped is released in advance, and the concave mold continues the suction state to cool the surface of the molded product, and then the suction is stopped to form the concave mold. A configuration in which the molded product is released from is adopted.

上記凹型と凸型を、結晶性樹脂発泡シート材の融点以下の温度範囲において、凸型を凹型と同温もしくは高温に設定して結晶性樹脂発泡シート材をプレス成形するようにしてもよい。   In the temperature range below the melting point of the crystalline resin foamed sheet material, the concave mold and the convex mold may be set to the same temperature or high temperature as the concave mold, and the crystalline resin foamed sheet material may be press-molded.

ここで、結晶性樹脂発泡シート材は、例えば、2mm厚を用い、凹型と凸型の嵌り合い成形隙間を1.5mmに設定し、この凹型と凸型で、角型となる容器本体の上部周辺に設けたフランジの一辺に、可曲部を介してフランジの外形と同じ平面的な大きさを有する蓋部材を一体成形した構造の容器を成形する。   Here, the crystalline resin foamed sheet material has a thickness of 2 mm, for example, and the concave and convex fitting molding gap is set to 1.5 mm. A container having a structure in which a lid member having the same planar size as the outer shape of the flange is integrally formed on one side of the flange provided on the periphery via a bendable portion.

上記凹型と凸型に設ける吸引口は、容器本体の底部コーナ部分や段部、可曲部、蓋部材の周枠部等のシート材を屈曲成形させる部分の対応位置に設け、容器の成形による屈曲部分の型付けが確実に行えるようにする。   The suction port provided in the concave shape and the convex shape is provided at a position corresponding to a portion where the sheet material such as a bottom corner portion, a step portion, a bendable portion, a peripheral frame portion of the lid member, etc. of the container body is bent and molded. Ensure that the bent part can be typed.

また、プレス成形時の凹型と凸型の温度は、例えば、凹型は120°以下、凸型は120°以上に設定することにより、特に、凸型で成形される容器本体の内面を結晶化して耐熱性を生じさせることができることになる。   In addition, the temperature of the concave and convex molds during press molding is set, for example, to 120 ° or less for concave molds and 120 ° or more for convex molds. Heat resistance can be produced.

この発明によると、凹型と凸型の成形隙間を成形に用いる結晶性樹脂発泡シート材の厚み以下に設定し、結晶性樹脂発泡シート材の全面を圧縮すると共に、凹型と凸型に設けた吸引口で結晶性樹脂発泡シート材を吸引することで、結晶性樹脂発泡シート材を凹型と凸型の両面に密着させることができ、容器の成形による屈曲部分の型付けが確実に行え、形状の精度が優れた容器の成形が行える。   According to this invention, the molding gap between the concave mold and the convex mold is set to be equal to or less than the thickness of the crystalline resin foam sheet material used for molding, and the entire surface of the crystalline resin foam sheet material is compressed, and the suction provided in the concave mold and the convex mold By sucking the crystalline resin foam sheet material through the mouth, the crystalline resin foam sheet material can be brought into close contact with both the concave and convex molds, and the bent part can be reliably molded by molding the container, and the accuracy of the shape Can form excellent containers.

また、結晶性樹脂発泡シート材を凹型と凸型に対して密着させることで、凹型と凸型の熱を結晶性樹脂発泡シート材に伝えることができ、これにより、成形した容器の両面の結晶化が可能となり、内面に耐熱性があり、中間層が断熱性を有し、外面が耐熱性と光沢性を備えた見た目の見栄えがよい容器を成形することができる。   In addition, by attaching the crystalline resin foam sheet material to the concave mold and the convex mold, the heat of the concave mold and the convex mold can be transferred to the crystalline resin foam sheet material. It is possible to form a container having a good appearance with an inner surface having heat resistance, an intermediate layer having heat insulation, and an outer surface having heat resistance and gloss.

更に、凸型を凹型と同温もしくは高温に設定して結晶性樹脂発泡シート材をプレス成形することにより、特に、容器内面の耐熱性が向上し、収納した食品を電子レンジで直接加熱が可能となる商品価値の優れた容器を提供することができる。   Furthermore, by setting the convex mold to the same temperature or high temperature as the concave mold, the crystalline resin foam sheet material is press-molded to improve the heat resistance of the inner surface of the container, and the stored food can be heated directly in the microwave. It is possible to provide a container with excellent commercial value.

以下、この発明の実施の形態を添付図面に基づいて説明する。   Embodiments of the present invention will be described below with reference to the accompanying drawings.

図5は、この発明の製造方法によって製造した発泡耐熱容器1の一例を示し、平面が角形となる容器本体2は、上部周辺に段部3を介して大形部4を有し、この大形部4の外周に角形のフランジ5を設けて形成され、前記フランジ5の一辺に、可曲部6を介して蓋部材7が連成され、この蓋部材7は、フランジ5の外形と同じ平面的な大きさを有し、一面側に突設した周枠部8とこの周枠部8で囲まれた部分に複数の補強リブ9が設けられている。   FIG. 5 shows an example of a foam heat-resistant container 1 manufactured by the manufacturing method of the present invention. A container body 2 having a square plane has a large portion 4 via a step portion 3 around the upper portion. A square flange 5 is provided on the outer periphery of the shape part 4, and a lid member 7 is coupled to one side of the flange 5 via a bendable part 6. The lid member 7 has the same outer shape as the flange 5. The peripheral frame portion 8 has a planar size and protrudes on one surface side, and a plurality of reinforcing ribs 9 are provided in a portion surrounded by the peripheral frame portion 8.

食品を収納した上記容器本体2の上部開口を閉じる場合は、可曲部6から蓋部材7を折り曲げて容器本体2のフランジ5上に重ね、この蓋部材7の周枠部8を容器本体2の上部大形部4に嵌め合わせることになる。   When closing the upper opening of the container body 2 containing food, the lid member 7 is folded from the bendable portion 6 and overlapped on the flange 5 of the container body 2, and the peripheral frame portion 8 of the lid member 7 is placed on the container body 2. The upper large portion 4 is fitted.

上記のような発泡耐熱容器1は、材料にPE、PP、PA、POM、PET等の結晶性樹脂をシートに成形してこれを発泡させた結晶性樹脂発泡シート材Aを用いると共に、発泡耐熱容器1の成形には、凹型(メス型)11と凸型(オス型)12を使用する。   The foam heat-resistant container 1 as described above uses a crystalline resin foamed sheet material A obtained by forming a crystalline resin such as PE, PP, PA, POM, and PET into a sheet and foaming the sheet. For forming the container 1, a concave (female) 11 and a convex (male) 12 are used.

図1乃至図4のように、凹型11は、横長の角形で上面がフラットになり、その上面側に容器本体成形部13と蓋部材成形部14及びその間に位置する可曲部成形部15が設けられ、容器本体成形部13は、容器本体2の外形を成形するための凹部13aとその上部に大形凹部13bが連なって上面で開口するように設けられている。   As shown in FIG. 1 to FIG. 4, the concave mold 11 has a horizontally long square shape with a flat top surface, and a container body molding part 13, a lid member molding part 14, and a bendable part molding part 15 positioned therebetween are formed on the upper surface side. The container main body forming portion 13 is provided such that a concave portion 13a for forming the outer shape of the container main body 2 and a large concave portion 13b are continuous with the concave portion 13a and open on the upper surface thereof.

また、蓋部材成形部14は、周枠部8を成形する枠状の突部14aと補強リブ9を成形する突条14bが突設され、可曲部成形部15は、凹型11の幅方向に沿って長くて低い帯状の突条15aを設けて形成されている。   Further, the lid member molding portion 14 is provided with a frame-like projection 14 a for molding the peripheral frame portion 8 and a protrusion 14 b for molding the reinforcing rib 9, and the bendable portion molding portion 15 is formed in the width direction of the concave mold 11. A long and low strip-shaped protrusion 15a is provided along the line.

凸型12は、横長の角形で下面がフラットになり、その下面側に容器本体成形部16と蓋部材成形部17及びその間に位置する可曲部成形部18が設けられ、容器本体成形部16は、容器本体2の内形を成形するための下向きに突出する凸部16aとその上部に大形凸部16bが連ねて設けられている。   The convex mold 12 has a horizontally long square shape with a flat bottom surface, and a container body molding portion 16, a lid member molding portion 17, and a bendable portion molding portion 18 positioned therebetween are provided on the lower surface side. Is provided with a convex portion 16a projecting downward for forming the inner shape of the container body 2 and a large convex portion 16b on the upper portion thereof.

また、蓋部材成形部17は、周枠部8を成形する枠状の凹部17aと補強リブ9を成形する凹溝17bを設けて形成され、可曲部成形部18は、凸型12の幅方向に沿って長い二条の低い突条18aを設けて形成されている。   The lid member molding portion 17 is formed by providing a frame-shaped concave portion 17 a for molding the peripheral frame portion 8 and a concave groove 17 b for molding the reinforcing rib 9, and the bendable portion molding portion 18 has a width of the convex mold 12. Two long low protrusions 18a are provided along the direction.

上記凹型11と凸型12は、成形時の上下対向面間及び容器本体成形部13、16と蓋部材成形部14、17及び可曲部成形部15、18の嵌り合い成形隙間aが、成形に用いる結晶性樹脂発泡シート材Aの厚み以下に設定され、成形時に結晶性樹脂発泡シート材Aの全体を均一に圧縮するようになっており、例えば、結晶性樹脂発泡シート材Aの厚みを2mmとすると、成形時の上下対向面間及び各嵌り合い成形隙間aは、1.5mmに設定されている。   The concave mold 11 and the convex mold 12 are formed by molding between the upper and lower opposing surfaces at the time of molding and the fitting molding gap a between the container body molding parts 13 and 16 and the lid member molding parts 14 and 17 and the bendable part molding parts 15 and 18. Is set to be equal to or less than the thickness of the crystalline resin foamed sheet material A used in the above, and the entire crystalline resin foamed sheet material A is uniformly compressed during molding. For example, the thickness of the crystalline resin foamed sheet material A is Assuming 2 mm, the upper and lower opposing surfaces and each fitting molding gap a during molding are set to 1.5 mm.

上記凹型11と凸型12には、容器本体2の底部コーナ部分や段部、可曲部6、蓋部材7の周枠部8等の結晶性樹脂発泡シート材Aを屈曲成形させる部分の対応位置に小さな吸引口19、20を一定間隔で多数個を並べて設け、凹型11と凸型12の外部に設置したバキューム機構と吸引口19、20を接続し、成形時に結晶性樹脂発泡シート材Aを両面から吸引することにより、発泡耐熱容器1の成形による屈曲部分の型付けが確実に行えるようになっている。   The concave mold 11 and the convex mold 12 correspond to portions where the crystalline resin foamed sheet material A is bent and formed, such as the bottom corner portion or step portion of the container body 2, the bendable portion 6, and the peripheral frame portion 8 of the lid member 7. A large number of small suction ports 19, 20 are arranged at regular intervals at a position, and a vacuum mechanism installed outside the concave mold 11 and the convex mold 12 is connected to the suction ports 19, 20. By suctioning from both sides, it is possible to reliably mold the bent portion by molding the heat-resistant foamed container 1.

上記凹型11と凸型12は、結晶性樹脂発泡シート材Aを加熱成形するよう、結晶性樹脂発泡シート材Aの融点以下の温度範囲において、凸型12を凹型11と同温もしくは高温に設定するようになっている。   The concave mold 11 and the convex mold 12 are set to the same temperature or high temperature as the concave mold 11 in the temperature range below the melting point of the crystalline resin foam sheet material A so that the crystalline resin foam sheet material A is thermoformed. It is supposed to be.

この設定温度は、結晶性樹脂発泡シート材Aの材質に対応して設定すればよく、例えば、2mm厚の結晶性樹脂発泡シート材Aを用いた場合、凹型11は120°以下、凸型12は120°以上、具体的には、凹型11は結晶化温度である100°、凸型12は結晶化温度である124°にして5秒以上の加熱時間に設定するのが好ましく、特に、凸型12を高温とすることで容器本体2及び蓋部材7の内面を確実に結晶化させて耐熱性を生じさせることができることになる。   This set temperature may be set according to the material of the crystalline resin foam sheet material A. For example, when the crystalline resin foam sheet material A having a thickness of 2 mm is used, the concave mold 11 is 120 ° or less, and the convex mold 12 is used. Is preferably 120 ° or more, specifically, the concave mold 11 is set to a crystallization temperature of 100 °, the convex mold 12 is set to a crystallization temperature of 124 °, and the heating time is preferably set to 5 seconds or more. By setting the mold 12 to a high temperature, the inner surfaces of the container main body 2 and the lid member 7 can be reliably crystallized to generate heat resistance.

次に、上記凹型11と凸型12及び結晶性樹脂発泡シート材Aを用いた発泡耐熱容器の製造方法を説明する。   Next, the manufacturing method of the foam heat-resistant container using the said concave mold 11, the convex mold 12, and the crystalline resin foam sheet material A is demonstrated.

上下に対向させた凹型11と凸型12を所定の温度に加熱した離型状態で、一定の大きさに裁断され、予め所定の温度に予熱された結晶性樹脂発泡シート材Aを凹型11の上面に載置し、凹型11に対して凸型12を下降させることで、容器本体成形部13、16においては、凸部16aが結晶性樹脂発泡シート材Aを凹部13aに向けて押し込み、蓋部材成形部14、17では、枠状の凹部17aが結晶性樹脂発泡シート材Aを枠状の突部14aに押し込み、可曲部成形部15、18は、帯状の突条15aと突条18aによって結晶性樹脂発泡シート材Aを圧縮し、凹型11と凸型12が設定された嵌り合い成形隙間aを形成する状態で嵌り合えば、凹型11と凸型12の熱で軟化した結晶性樹脂発泡シート材Aは元の厚みよりも薄くなるように全体が圧縮を受け、可曲部6以外の部分は一定の厚みに圧縮される。   With the concave mold 11 and the convex mold 12 opposed to each other in the vertical direction being released to a predetermined temperature, the crystalline resin foamed sheet material A cut into a predetermined size and preheated to a predetermined temperature is used as the concave mold 11. By placing the convex mold 12 on the upper surface and lowering the convex mold 12 with respect to the concave mold 11, in the container body molding parts 13, 16, the convex part 16a pushes the crystalline resin foam sheet material A toward the concave part 13a, and the lid In the member forming portions 14 and 17, the frame-shaped concave portion 17a pushes the crystalline resin foam sheet material A into the frame-shaped protrusion 14a, and the bendable portion forming portions 15 and 18 include the strip-shaped protrusion 15a and the protrusion 18a. The crystalline resin foamed sheet material A is compressed by the above, and is fitted in a state where the concave mold 11 and the convex mold 12 are set to form the fitting molding gap a. The crystalline resin softened by the heat of the concave mold 11 and the convex mold 12 The foam sheet material A is thinner than the original thickness. Whole is subjected to compression urchin, portions other than the bendable portion 6 is compressed to a certain thickness.

上記容器本体成形部13、16は容器本体2を成形し、蓋部材成形部14、17は蓋部材7を成形し、可曲部成形部15、18が可曲部6を成形することになる。   The container body molding parts 13 and 16 mold the container body 2, the lid member molding parts 14 and 17 mold the lid member 7, and the bendable part molding parts 15 and 18 mold the bendable part 6. .

上記のように、凹型11と凸型12で結晶性樹脂発泡シート材Aをプレスした状態で、図4に矢印で示すように、凹型11と凸型12に設けた吸引口19、20にバキュームを作用させ、結晶性樹脂発泡シート材Aを両面から吸引し、この結晶性樹脂発泡シート材Aを凹型11と凸型12の両面に密着させ、容器本体2や蓋部材7及び可曲部6における屈曲部分の型付けを確実に行う。   As described above, the crystalline resin foam sheet material A is pressed with the concave mold 11 and the convex mold 12, and the suction ports 19 and 20 provided in the concave mold 11 and the convex mold 12 are vacuumed as shown by arrows in FIG. The crystalline resin foam sheet material A is sucked from both sides, the crystalline resin foam sheet material A is brought into close contact with both the concave mold 11 and the convex mold 12, and the container body 2, the lid member 7 and the bendable section 6 are adhered. Make sure to mold the bent part.

このように、結晶性樹脂発泡シート材Aを両面から吸引して凹型11と凸型12の両面に密着させることにより、凹型11と凸型12の熱が結晶性樹脂発泡シート材Aに伝わり、結晶性樹脂発泡シート材Aの両面を確実に結晶化させることができる。   Thus, by sucking the crystalline resin foam sheet material A from both sides and bringing it into close contact with both surfaces of the concave mold 11 and the convex mold 12, the heat of the concave mold 11 and the convex mold 12 is transmitted to the crystalline resin foam sheet material A, Both surfaces of the crystalline resin foam sheet material A can be reliably crystallized.

上記のようなプレス成形時間は、例えば5秒以上とし、このプレス成形時間後に、凸型12に設けた吸引口20でのバキュームを停止し、この凸型12を先行して離型させると、凹型11の吸引口19で吸引されている発泡耐熱容器1は凹型11に残り、凹型11の吸引口19で吸引を例えば2秒以上続けることで発泡耐熱容器1の内面側となる表面を冷却する。   The press molding time as described above is, for example, 5 seconds or more, and after this press molding time, the vacuum at the suction port 20 provided in the convex mold 12 is stopped and the convex mold 12 is released in advance. The foam heat-resistant container 1 sucked by the suction port 19 of the concave mold 11 remains in the concave mold 11, and the surface that becomes the inner surface side of the foam heat-resistant container 1 is cooled by continuing the suction by the suction port 19 of the concave mold 11 for 2 seconds or more. .

次に、凹型11に設けた吸引口19でのバキュームを停止し、成形した発泡耐熱容器1を凹型11から離形すれば、発泡耐熱容器1の成形が完了する。   Next, when the vacuum at the suction port 19 provided in the concave mold 11 is stopped and the molded heat-resistant container 1 is separated from the concave mold 11, the molding of the heat-resistant foam container 1 is completed.

上記のような発泡耐熱容器1の成形において、凹型11よりも凸型12の温度を高く設定することにより、発泡耐熱容器1の内面側表面の結晶化が進むことになり、これにより、得られた発泡耐熱容器1は、容器本体2及び蓋部材7の内面側に耐熱性があり、中間層に断熱性があり、外周面が耐熱性と光沢性が得られることになると共に、全体が圧縮されて固定化されているので、強度の向上が図れることになる。   In the molding of the heat-resistant foamed container 1 as described above, by setting the temperature of the convex mold 12 higher than that of the concave mold 11, the crystallization of the inner surface of the foamed heat-resistant container 1 proceeds, and thus obtained. The foamed heat-resistant container 1 has heat resistance on the inner surface side of the container body 2 and the lid member 7, the intermediate layer has heat insulation, the outer peripheral surface is heat resistant and glossy, and the whole is compressed. As a result, the strength can be improved.

このように、発泡耐熱容器1は内面の耐熱性により、収納した食品の電子レンジによる直接加熱が可能になり、また、外周面の耐熱性と光沢性により、見た目の見栄えがよい容器となり、商品価値が向上することになる。   In this way, the heat-resistant foamed container 1 can directly heat the stored food by the microwave oven due to the heat resistance of the inner surface, and the heat resistance and glossiness of the outer peripheral surface makes the container look good. Value will be improved.

発泡耐熱容器の成形に用いる凹型と凸型の分解斜視図Exploded perspective view of concave and convex molds used for molding foam heat-resistant containers 発泡耐熱容器の成形状態を示す凹型と凸型の平面図Top view of concave and convex molds showing the molded state of the foam heat-resistant container 発泡耐熱容器の成形状態を示す凹型と凸型の凸型を一部切り欠いた平面図A plan view showing a molded state of the foam heat-resistant container, with the concave mold and the convex mold partially cut away (a)は図2の矢印A−A線での縦断正面図、(b)は図2の矢印B−B線での縦断側面図、(c)は図2の矢印C−C線での縦断側面図(A) is a longitudinal front view taken along line AA in FIG. 2, (b) is a longitudinal side view taken along line BB in FIG. 2, and (c) is taken along line CC in FIG. Longitudinal side view 発泡耐熱容器の蓋部材を開いた斜視図Perspective view with lid member of foam heat-resistant container opened

符号の説明Explanation of symbols

1 発泡耐熱容器
2 容器本体
3 段部
4 大形部
5 フランジ
6 可曲部
7 蓋部材
8 周枠部
9 補強リブ
11 凹型
12 凸型
13 容器本体成形部
14 蓋部材成形部
15 可曲部成形部
16 容器本体成形部
17 蓋部材成形部
18 可曲部成形部
19 吸引口
20 吸引口
A 結晶性樹脂発泡シート材
DESCRIPTION OF SYMBOLS 1 Foam heat-resistant container 2 Container body 3 Step part 4 Large part 5 Flange 6 Bendable part 7 Lid member 8 Peripheral frame part 9 Reinforcement rib 11 Concave type 12 Convex type 13 Container body molded part 14 Lid member molded part 15 Bendable part molding Part 16 Container body molding part 17 Lid member molding part 18 Bendable part molding part 19 Suction port 20 Suction port A Crystalline resin foam sheet material

Claims (2)

凹型と凸型の嵌り合い成形隙間を、成形に用いる結晶性樹脂発泡シート材の厚み以下に設定し、加熱させた凹型と凸型で結晶性樹脂発泡シート材を両面から挟んでプレス成形した際、凹型と凸型に設けた吸引口で結晶性樹脂発泡シート材を吸引して凹型と凸型の両面に密着させることにより結晶性樹脂発泡シート材の結晶化を行い、成形後に、吸引を停止させた凸型を先行で離型させて凹型は吸引状態を継続することで成形品の表面を冷やし、この後、吸引を停止して凹型から成形品を離型する発泡耐熱容器の製造方法。   When the concave and convex fitting molding gap is set to be equal to or less than the thickness of the crystalline resin foam sheet material used for molding, and the crystalline resin foam sheet material is sandwiched from both sides by the heated concave mold and convex mold. The crystalline resin foam sheet material is crystallized by sucking the crystalline resin foam sheet material through the suction ports provided in the concave and convex molds and sticking it to both sides of the concave mold and convex mold. A method for producing a heat-resistant foamed container, in which the raised mold is released in advance and the recessed mold cools the surface of the molded product by continuing the suction state, and thereafter the suction is stopped and the molded product is released from the recessed mold. 上記凹型と凸型を、結晶性樹脂発泡シート材の融点以下の温度範囲において、凸型を凹型と同温もしくは高温に設定して結晶性樹脂発泡シート材をプレス成形する請求項1に記載の発泡耐熱容器の製造方法。   The crystalline resin foamed sheet material is press-molded by setting the concave mold and the convex mold at the same temperature or high temperature as the concave mold in a temperature range below the melting point of the crystalline resin foamed sheet material. A method for manufacturing a foam heat-resistant container.
JP2007070664A 2007-03-19 2007-03-19 Manufacturing method of foam heat-resistant container Active JP4974723B2 (en)

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