JP3176075U - Foamed resin molds and dissimilar foamed resin molded products - Google Patents

Foamed resin molds and dissimilar foamed resin molded products Download PDF

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JP3176075U
JP3176075U JP2012001655U JP2012001655U JP3176075U JP 3176075 U JP3176075 U JP 3176075U JP 2012001655 U JP2012001655 U JP 2012001655U JP 2012001655 U JP2012001655 U JP 2012001655U JP 3176075 U JP3176075 U JP 3176075U
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foamed resin
shutter
resin material
cavity
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雅光 近藤
有史 榊原
伸一 下島
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Sekisui Kasei Co Ltd
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Abstract

【課題】異種発泡樹脂材料どうしの接合界面における接合強度を高めることのできる発泡樹脂成形金型及び異種発泡樹脂成形品を提供する。
【解決手段】発泡樹脂成形金型は、固定型２０側から可動型３０に対してスライド可能に出没してキャビティ１２を仕切るシャッター４０を具える。該シャッターによって仕切られた第１キャビティ２４と第２キャビティ２７に、発泡倍率の異なる発泡樹脂材料からなる第１発泡樹脂粒子５０と第２発泡樹脂粒子６０を夫々充填し、シャッターをスライド開放して加熱することにより、発泡倍率の異なる発泡樹脂を連続的に成形する。固定型の内面に凹設され、シャッターの側部が嵌まる側溝２２と、可動型の内面に凹設され、シャッターの先端が嵌まる底溝３２と、を有し、側溝と底溝は、シャッターをスライド開放して加熱したときに、何れかの発泡樹脂材料が侵入する幅Ｗ，Ｗ’である。
【選択図】図２The present invention provides a foamed resin molding die and a different kind of foamed resin molded product capable of increasing the joint strength at the joint interface between different kinds of foamed resin materials.
A foamed resin molding die includes a shutter 40 that slidably protrudes from a fixed die 20 side with respect to a movable die 30 to partition a cavity 12. The first cavity 24 and the second cavity 27 partitioned by the shutter are filled with the first foamed resin particles 50 and the second foamed resin particles 60 made of foamed resin materials having different foaming ratios, respectively, and the shutter is slid open. By heating, foamed resins having different foaming ratios are continuously formed. It has a side groove 22 that is recessed in the inner surface of the fixed mold and fits in the side of the shutter, and a bottom groove 32 that is recessed in the inner surface of the movable mold and fits in the tip of the shutter. The widths W and W ′ allow any foamed resin material to enter when the shutter is slid open and heated.
[Selection] Figure 2

Description

本考案は、異種発泡樹脂材料を連続的に成形する発泡樹脂成形金型及び異種発泡樹脂成形品に関するものである。   The present invention relates to a foamed resin molding die for continuously molding a different foamed resin material and a different foamed resin molded product.

発泡樹脂成形品は、固定型と該固定型に対して移動可能な可動型とを具える発泡樹脂成形金型のキャビティに発泡樹脂材料の粒子を充填し、金型内を加熱して発泡樹脂粒子を熱膨張させることで作製される。   A foamed resin molded product is obtained by filling a cavity of a foamed resin molding mold having a fixed mold and a movable mold movable with respect to the fixed mold with particles of the foamed resin material and heating the inside of the mold. It is produced by thermally expanding the particles.

発泡倍率が異なる異種発泡樹脂材料を用い、発泡倍率が途中で変化する異種発泡樹脂成形品が知られている。例えば、特許文献１では、固定型と可動型からなる発泡樹脂成形金型のキャビティを固定型から出没可能なシャッターによって仕切り、シャッターにより仕切られたキャビティの夫々に発泡倍率が異なる発泡樹脂粒子を充填し、シャッターを開放し、加熱することで成形を行なっている。   A different type of foamed resin molded article is known in which different foaming resin materials having different foaming ratios are used, and the foaming ratio changes midway. For example, in Patent Document 1, a cavity of a foamed resin molding mold composed of a fixed mold and a movable mold is partitioned by a shutter that can protrude and retract from the fixed mold, and each of the cavities partitioned by the shutter is filled with foamed resin particles having different foaming ratios. The molding is performed by opening the shutter and heating.

特開２００６−１２３７３２号公報JP 2006-123732 A

発泡樹脂材料の発泡倍率の差が大きくなると(例えば密度差０.０３ｇ／ｃｍ３以上)、異種発泡樹脂材料どうしの接合界面において互いの接合強度が弱くなり、接合界面で剥離してしまう虞がある。 When the difference in foaming ratio between the foamed resin materials becomes large (for example, a density difference of 0.03 g / cm 3 or more), the joint strength between the different foamed resin materials becomes weak, and there is a risk of peeling at the joint interface. is there.

本考案の目的は、異種発泡樹脂材料どうしの接合界面における接合強度を高めることのできる発泡樹脂成形金型及び異種発泡樹脂成形品を提供することである。   An object of the present invention is to provide a foamed resin molding die and a different type of foamed resin molded product that can increase the joint strength at the joint interface between different kinds of foamed resin materials.

本考案に係る発泡樹脂成形金型は、
固定型と可動型により形成されたキャビティと、
固定型側から可動型に対してスライド可能に出没してキャビティを仕切るシャッターを具え、
該シャッターによって仕切られた第１キャビティと第２キャビティに、発泡倍率の異なる発泡樹脂材料からなる第１発泡樹脂粒子と第２発泡樹脂粒子を夫々充填し、シャッターをスライド開放して加熱することにより、発泡倍率の異なる発泡樹脂を連続的に成形する発泡樹脂成形金型であって、
前記固定型の内面に凹設され、前記シャッターの側部が嵌まる側溝と、
前記可動型の内面に凹設され、前記シャッターの先端が嵌まる底溝と、
を有し、
前記側溝と底溝は、シャッターをスライド開放して加熱したときに、何れかの発泡樹脂材料が侵入する幅である。 The foamed resin mold according to the present invention is
A cavity formed by a fixed mold and a movable mold;
Provided with a shutter that slidably moves from the fixed mold side to the movable mold to partition the cavity,
By filling the first cavity and the second cavity partitioned by the shutter with the first foamed resin particles and the second foamed resin particles made of foamed resin materials having different foaming ratios, respectively, and by opening the shutter and heating it. A foamed resin molding die for continuously molding foamed resins having different foaming ratios,
A side groove recessed in the inner surface of the fixed mold and into which a side portion of the shutter is fitted;
A bottom groove recessed in the inner surface of the movable mold, into which the tip of the shutter fits;
Have
The side groove and the bottom groove have such a width that any foamed resin material enters when the shutter is slid open and heated.

また、本考案の異種発泡樹脂成形品は、
発泡倍率の異なる第１発泡樹脂材料と第２発泡樹脂材料を連続的に成形してなる異種発泡樹脂成形品であって、
第１発泡樹脂材料と第２発泡樹脂材料との接合界面は、外周に第１発泡樹脂材料がはみ出た隆起条が形成されている。 In addition, the different foamed resin molded product of the present invention is
A different type of foamed resin molded product obtained by continuously molding a first foamed resin material and a second foamed resin material having different foaming ratios,
At the joining interface between the first foamed resin material and the second foamed resin material, a ridge that protrudes from the first foamed resin material is formed on the outer periphery.

本考案の発泡樹脂成形金型によれば、シャッターをスライド開放したときに、側溝及び底溝に何れかの発泡樹脂粒子が侵入する。側溝及び底溝に侵入した発泡樹脂材料は、異種発泡樹脂成形品において、第１発泡樹脂材料と第２発泡樹脂材料の接合界面の外周からはみ出た隆起条となる。
異種発泡樹脂成形品は、この隆起条により、第１発泡樹脂材料と第２発泡樹脂材料との接合界面の面積を大きく採ることができ、接合界面の強度を高めることができる。 According to the foamed resin molding die of the present invention, when the shutter is slid open, any one of the foamed resin particles enters the side groove and the bottom groove. The foamed resin material that has entered the side groove and the bottom groove becomes a raised ridge protruding from the outer periphery of the joint interface between the first foamed resin material and the second foamed resin material in the different foamed resin molded product.
The different foamed resin molded product can take a large area of the joint interface between the first foamed resin material and the second foamed resin material by this raised ridge, and can increase the strength of the joint interface.

図１は、本考案の一実施形態に係る発泡樹脂成形金型の断面図であって、発泡樹脂粒子充填前の状態を示している。FIG. 1 is a cross-sectional view of a foamed resin molding die according to an embodiment of the present invention, showing a state before filling with foamed resin particles. 図２は、同発泡樹脂成形金型の断面図であって、発泡樹脂粒子を充填した状態を示している。FIG. 2 is a cross-sectional view of the foamed resin molding die showing a state in which foamed resin particles are filled. 図３は、同発泡樹脂成形金型の断面図であって、シャッターを開放した状態を示している。FIG. 3 is a cross-sectional view of the foamed resin molding die showing a state where the shutter is opened. 図４は、同発泡樹脂成形金型の断面図であって、可動型を固定型から離間させた状態を示している。FIG. 4 is a cross-sectional view of the foamed resin molding die, showing a state where the movable die is separated from the fixed die. 図５は、本考案の異種発泡樹脂成形品の要部を拡大して示す斜視図である。FIG. 5 is an enlarged perspective view showing a main part of the different foamed resin molded product of the present invention. 図６は、図５の線Ａ−Ａに沿う矢視断面図である。6 is a cross-sectional view taken along line AA in FIG.

図１は、本考案の一実施例を示す発泡樹脂成形金型(10)の平面断面図である。図に示すように、発泡樹脂成形金型(10)は、固定型(20)と可動型(30)からなり、固定型(20)と可動型(30)との間に、発泡樹脂材料(50)(60)の充填されるキャビティ(12)が形成されている。   FIG. 1 is a plan sectional view of a foamed resin mold (10) showing an embodiment of the present invention. As shown in the figure, the foamed resin molding die (10) is composed of a fixed mold (20) and a movable mold (30), and between the fixed mold (20) and the movable mold (30), a foamed resin material ( A cavity (12) filled with 50) and (60) is formed.

本実施例において説明する発泡樹脂成形金型(10)は、自動車のバンパー芯材成形用のものであり、固定型(20)が凹型、可動型(30)が凸型となるよう構成されている。より詳細には、本実施例により作製される異種発泡樹脂成形品(80)は、後述する図５及び図６に示すように、外周(81)(82)のうち、凹型となる固定型(20)側が自動車のフレームに装着される取付面(83)となるよう構成されている。   The foamed resin molding die (10) described in the present embodiment is for molding a bumper core material of an automobile, and is configured such that the fixed die (20) is a concave die and the movable die (30) is a convex die. Yes. More specifically, as shown in FIGS. 5 and 6 to be described later, the dissimilar foamed resin molded product (80) produced according to the present example is a fixed mold (which is a concave mold in the outer periphery (81) (82) ( The 20) side is configured to be a mounting surface (83) to be mounted on the automobile frame.

発泡樹脂成形金型(10)の周囲には、加熱蒸気を導入し、固定型(20)及び可動型(30)を加熱して、キャビティ(12)内の発泡樹脂材料を融着させる蒸気室(14)が形成されている。   A steam chamber in which heated steam is introduced around the foamed resin mold (10) to heat the fixed mold (20) and the movable mold (30) to fuse the foamed resin material in the cavity (12). (14) is formed.

可動型(30)は、スライド機構(図示せず)によって、固定型(20)に対して接近、離間可能となっている。
また、固定型(20)には、スリット(21)が形成されており、該スリット(21)には、可動型(30)に向けて出没可能なシャッター(40)が貫通している。シャッター(40)の一端は、シリンダ等から構成される開閉機構(42)に連繋されており、開閉機構(42)の作動、即ち、シリンダの伸縮によって、シャッター(40)が固定型(20)から可動型(30)に向けて出没し、キャビティ(12)を仕切り可能となっている。 The movable mold (30) can be moved toward and away from the fixed mold (20) by a slide mechanism (not shown).
In addition, a slit (21) is formed in the fixed mold (20), and a shutter (40) that can be projected and retracted toward the movable mold (30) passes through the slit (21). One end of the shutter (40) is connected to an opening / closing mechanism (42) composed of a cylinder or the like, and the shutter (40) is fixed to the fixed type (20) by the operation of the opening / closing mechanism (42), that is, expansion and contraction of the cylinder. It is possible to partition the cavity (12) by intruding toward the movable mold (30).

シャッター(40)は、次に説明する固定型(20)及び可動型(30)に凹設された側溝(22)及び底溝(32)にスライド可能に嵌まる外形及び寸法に形成される。   The shutter (40) is formed to have an outer shape and dimensions that are slidably fitted into a side groove (22) and a bottom groove (32) that are recessed in the fixed mold (20) and the movable mold (30) described below.

固定型(20)の内面には、スリット(21)に連続して、シャッター(40)の側部がスライド可能に嵌まる側溝(22)が凹設されている。
側溝(22)の幅Ｗは、後述する第１発泡樹脂粒子(50)が側溝(22)に侵入可能となるように、第１発泡樹脂粒子(50)の粒径以上の幅とすることが好適である。より望ましくは、第１発泡樹脂粒子(50)の粒径の１〜約３倍とする。なお、少なくとも、シャッター(40)の厚さｔ以上とし、シャッター(40)をスムーズにスライドさせるために、幅Ｗはシャッター(40)の厚さｔ＋０．２〜０．４ｍｍとする。 On the inner surface of the fixed mold (20), a side groove (22) is provided continuously with the slit (21) so that the side portion of the shutter (40) can be slidably fitted therein.
The width W of the side groove (22) is set to be equal to or larger than the particle diameter of the first foamed resin particle (50) so that the first foamed resin particle (50) described later can enter the side groove (22). Is preferred. More desirably, it is 1 to about 3 times the particle size of the first foamed resin particles (50). Note that at least the thickness t of the shutter (40) is set to be equal to or greater than t, and the width W is set to the thickness t + 0.2 to 0.4 mm of the shutter (40) in order to smoothly slide the shutter (40).

また、可動型(30)の内面には、シャッター(40)のスライド移行路の先端に、シャッター(40)の先端が嵌まる底溝(32)が凹設されている。底溝(32)は、可動型(30)を固定型(20)に対して閉方向に移動させたときに、可動型(20)の側溝(22)と連続するよう形成することができる。   In addition, a bottom groove (32) into which the tip of the shutter (40) is fitted is recessed in the inner surface of the movable mold (30) at the tip of the slide transition path of the shutter (40). The bottom groove (32) can be formed to be continuous with the side groove (22) of the movable mold (20) when the movable mold (30) is moved in the closing direction with respect to the fixed mold (20).

底溝(32)の幅Ｗ’は、前記固定型(20)の側溝(22)の幅Ｗと同様に、第１発泡樹脂粒子(50)が側溝(22)に侵入可能となるように、第１発泡樹脂粒子(50)の粒径以上の幅とすることが好適である。より望ましくは、第１発泡樹脂粒子(50)の粒径の１〜約３倍とする。なお、少なくとも、シャッター(40)の厚さｔ以上とし、シャッター(40)をスムーズにスライドさせるために、幅Ｗ’はシャッター(40)の厚さｔ＋０．２〜０．４ｍｍとする。   The width W ′ of the bottom groove (32) is the same as the width W of the side groove (22) of the fixed mold (20) so that the first foamed resin particles (50) can enter the side groove (22). The width is preferably equal to or larger than the particle diameter of the first foamed resin particles (50). More desirably, it is 1 to about 3 times the particle size of the first foamed resin particles (50). Note that at least the thickness t of the shutter (40) is set to be equal to or larger than the thickness t, and the width W ′ is set to the thickness t + 0.2 to 0.4 mm of the shutter (40) in order to smoothly slide the shutter (40).

上記シャッター(40)を可動型(30)側にスライドさせることで、キャビティ(12)は、２つの空間に分割される。ここでは、分割された空間の内、図中左側の空間を第１キャビティ(24)、右側の空間を第２キャビティ(27)と称する。   By sliding the shutter (40) toward the movable mold (30), the cavity (12) is divided into two spaces. Here, among the divided spaces, the left space in the figure is referred to as a first cavity (24), and the right space is referred to as a second cavity (27).

固定型(20)には、前記第１キャビティ(24)、第２キャビティ(27)に夫々連通する原料充填孔(25)(28)が開設されており、該原料充填孔(25)(28)は、夫々原料フィーダ(図示せず)に接続されている。   The fixed mold (20) is provided with raw material filling holes (25) and (28) communicating with the first cavity (24) and the second cavity (27), respectively, and the raw material filling holes (25) (28) ) Are each connected to a raw material feeder (not shown).

上記構成の発泡樹脂成形金型(10)において、可動型(30)を固定型(20)に係合した状態で、図１に示すように、開閉機構(42)を作動させて、シャッター(40)を可動型(30)方向にスライドさせる。これにより、シャッター(40)は、側部が固定型(20)の側溝(22)に側部が嵌まり、先端が可動型(30)の底溝(32)に嵌まる。   In the foamed resin molding die (10) having the above-described configuration, with the movable die (30) engaged with the fixed die (20), the opening / closing mechanism (42) is operated as shown in FIG. Slide 40) in the direction of the movable mold (30). As a result, the side of the shutter (40) is fitted into the side groove (22) of the fixed mold (20), and the tip is fitted into the bottom groove (32) of the movable mold (30).

上記の如く、シャッター(40)によりキャビティ(12)が第１キャビティ(24)と第２キャビティ(27)に分割された状態で、図２に示すように、第１キャビティ(24)に第１発泡樹脂材料(50)、第２キャビティ(27)に第２発泡樹脂材料(60)が充填される。   As described above, the cavity (12) is divided into the first cavity (24) and the second cavity (27) by the shutter (40), and as shown in FIG. The foamed resin material (50) and the second cavity (27) are filled with the second foamed resin material (60).

第１発泡樹脂材料(50)及び第２発泡樹脂材料(60)は、夫々、発泡樹脂粒子の形態でキャビティ(24)(27)に充填することができる。
なお、発泡樹脂粒子は、発泡剤を含有させた合成樹脂粒子を予備発泡させて得られるものである。この合成樹脂粒子を構成する合成樹脂は、任意の発泡樹脂とすることができるが、熱可塑性樹脂の発泡樹脂であることが好ましい。熱可塑性樹脂には、ポリスチレン系樹脂、ポリオレフィン系樹脂(例えばポリプロピレン系樹脂、ポリエチレン系樹脂)、ポリエステル系樹脂(例えばポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレンナフタレート)、ポリカーボネート系樹脂、ポリ乳酸系樹脂などが挙げられる。なかでも、ポリスチレンとポリエチレンとを含む複合樹脂を用いることが好ましい。 The first foamed resin material (50) and the second foamed resin material (60) can be filled in the cavities (24) and (27) in the form of foamed resin particles, respectively.
The foamed resin particles are obtained by pre-foaming synthetic resin particles containing a foaming agent. The synthetic resin constituting the synthetic resin particles may be any foamed resin, but is preferably a thermoplastic resin foamed resin. Thermoplastic resins include polystyrene resins, polyolefin resins (eg, polypropylene resins, polyethylene resins), polyester resins (eg, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate), polycarbonate resins, polylactic acid resins, etc. Is mentioned. Among these, it is preferable to use a composite resin containing polystyrene and polyethylene.

第１発泡樹脂材料(50)及び第２発泡樹脂材料(60)は、発泡倍率の異なる、即ち異種発泡樹脂材料を選択する。なお、本実施例では、第１発泡樹脂材料(50)を、第２発泡樹脂材料(60)よりも低発泡倍率の発泡樹脂材料として説明を行なう。
この場合、第１発泡樹脂材料(50)の望ましい発泡倍率は、５〜５０倍、第２発泡樹脂材料(60)の望ましい発泡倍率は、１０〜９０倍である。 As the first foamed resin material (50) and the second foamed resin material (60), different foaming resin materials, that is, different foamed resin materials are selected. In the present embodiment, the first foamed resin material (50) will be described as a foamed resin material having a lower foaming ratio than the second foamed resin material (60).
In this case, the desirable expansion ratio of the first foamed resin material (50) is 5 to 50 times, and the desirable expansion ratio of the second foamed resin material (60) is 10 to 90 times.

第１発泡樹脂材料(50)の粒子(以下「第１発泡樹脂粒子(50)」とも称する)は、第２発泡樹脂材料(60)の粒子(以下「第２発泡樹脂粒子(60)」とも称する)より小粒径とすることが望ましい。発泡樹脂粒子の望ましい粒径は、第１発泡樹脂材料(50)が１.５〜６.５ｍｍ、第２発泡樹脂材料(60)が２.５〜１５ｍｍである。   Particles of the first foamed resin material (50) (hereinafter also referred to as “first foamed resin particles (50)”) are particles of the second foamed resin material (60) (hereinafter referred to as “second foamed resin particles (60)”). It is desirable to have a smaller particle size. Desirable particle diameters of the foamed resin particles are 1.5 to 6.5 mm for the first foamed resin material (50) and 2.5 to 15 mm for the second foamed resin material (60).

図２に示すように、第１発泡樹脂粒子(50)は、第１キャビティ(24)側の原料充填孔(25)から第１キャビティ(24)に充填され、第２発泡樹脂粒子(60)は、第２キャビティ(27)側の原料充填孔(28)から第２キャビティ(27)に充填される。   As shown in FIG. 2, the first foamed resin particles (50) are filled into the first cavities (24) from the raw material filling holes (25) on the first cavity (24) side, and the second foamed resin particles (60) are filled. Is filled into the second cavity (27) from the raw material filling hole (28) on the second cavity (27) side.

投入された第１発泡樹脂粒子(50)及び第２発泡樹脂粒子(60)は、重力作用により、各キャビティ(24)(27)の底側から夫々順次積み重なっていく。   The first foamed resin particles (50) and the second foamed resin particles (60) that have been charged are sequentially stacked from the bottom of the cavities (24) and (27) by gravity.

図２に示すように、第１発泡樹脂粒子(50)と第２発泡樹脂粒子(60)が、各キャビティ(24)(27)に十分に充填されると、原料の供給を止め、原料充填孔(25)(28)を閉じて、開閉機構(42)を作動させて、図３に示すように、シャッター(40)を開放する。   As shown in FIG. 2, when the first foamed resin particles (50) and the second foamed resin particles (60) are sufficiently filled in the cavities (24) and (27), the supply of the raw materials is stopped and the raw material is filled. The holes (25) and (28) are closed and the opening / closing mechanism (42) is operated to open the shutter (40) as shown in FIG.

シャッター(40)を開放すると、固定型(20)の側溝(22)に小粒径である第１発泡樹脂粒子(50)が侵入し、図３に示すように、可動型(30)の底溝(32)にも第１発泡樹脂粒子(50)が侵入する。   When the shutter (40) is opened, the first foamed resin particles (50) having a small particle size enter the side groove (22) of the fixed mold (20), and as shown in FIG. 3, the bottom of the movable mold (30) The first foamed resin particles (50) also enter the groove (32).

この状態で、蒸気室(14)に加熱蒸気を導入して、発泡樹脂粒子(50)(60)を加熱すると、これら粒子は、軟化、膨張し、接合界面(85)(図６参照)にて相互に接合される。このとき、前記側溝(22)及び底溝(32)に侵入した第１発泡樹脂粒子(50)は、側溝(22)及び底溝(32)の形状に沿って膨張する。   In this state, when heated steam is introduced into the steam chamber (14) and the foamed resin particles (50) and (60) are heated, these particles soften and expand, and enter the bonding interface (85) (see FIG. 6). Are joined together. At this time, the first foamed resin particles (50) that have entered the side groove (22) and the bottom groove (32) expand along the shape of the side groove (22) and the bottom groove (32).

加熱終了後、キャビティ(12)内の冷却を行ない、スライド機構を作動させて、図４に示すように、可動型(30)を固定型(20)から離間させ、異種発泡成形品(80)を取り出す。   After the heating, the cavity (12) is cooled and the slide mechanism is operated to move the movable mold (30) away from the fixed mold (20) as shown in FIG. Take out.

図５は、成形された異種発泡樹脂成形品(80)の部分拡大斜視図であり、図中、上側に見えている面が、可動型(30)側となっている。また、図６は、図５の線Ａ−Ａに沿う矢視断面図であり、同様に、上側が可動型(30)側となっている。   FIG. 5 is a partially enlarged perspective view of the molded different-shaped foamed resin molded product (80), and the surface visible on the upper side is the movable mold (30) side. 6 is a cross-sectional view taken along the line AA in FIG. 5, and similarly, the upper side is the movable mold (30) side.

図５に示すように、本考案の異種発泡樹脂成形品(80)は、第１発泡樹脂材料(50)が側溝(22)及び底溝(32)の形状に沿って突出し、隆起条(84)を形成している。この隆起条(84)は、図６に示すように、第１発泡樹脂材料(50)と第２発泡樹脂材料(60)の接合界面(85)の外周(81)からはみ出るように形成される。   As shown in FIG. 5, in the different foamed resin molded product (80) of the present invention, the first foamed resin material (50) protrudes along the shape of the side groove (22) and the bottom groove (32), and the ridge (84) ) Is formed. As shown in FIG. 6, the ridges (84) are formed so as to protrude from the outer periphery (81) of the joint interface (85) between the first foamed resin material (50) and the second foamed resin material (60). .

本実施例においては、図５及び図６に示すように、異種発泡樹脂成形品(80)の外周(81)から突出する隆起条(84)は、自動車のフレームへの取付面(83)となる外周(82)以外の３面に形成している。これは、取付面(83)に隆起条(84)を形成すると、ガタツキ等の原因となるためである。   In this embodiment, as shown in FIG. 5 and FIG. 6, the raised ridge (84) protruding from the outer periphery (81) of the dissimilar foamed resin molded product (80) has an attachment surface (83) to the frame of the automobile. It is formed on three surfaces other than the outer periphery (82). This is because if the raised ridge (84) is formed on the mounting surface (83), it causes backlash and the like.

第１発泡樹脂材料(50)が側溝(22)及び底溝(32)に充填されて形成された隆起条(84)は、図６に示すように、第２発泡樹脂材料(60)側に被さるように形成されている。従って、第１発泡樹脂材料(50)と第２発泡樹脂材料(60)との接合界面(85)の面積を大きくすることとなり、接合界面(85)の接合強度を可及的に高めることができる。   The ridges (84) formed by filling the first foamed resin material (50) into the side grooves (22) and the bottom groove (32) are formed on the second foamed resin material (60) side as shown in FIG. It is formed to cover. Therefore, the area of the joining interface (85) between the first foamed resin material (50) and the second foamed resin material (60) is increased, and the joining strength of the joining interface (85) is increased as much as possible. it can.

なお、異種発泡樹脂成形品(80)の接合界面(85)の外周の２面以上が取付面(83)となる場合には、対応する取付面(83)に隆起条(84)を設けない構成とすることもできる。また、接合界面(85)の外周(81)(82)が取付面(83)とはならない場合には、接合界面(85)の外周全周に隆起条(84)を設けることが望ましい。   When two or more outer peripheral surfaces of the joint interface (85) of the dissimilar foamed resin molded product (80) are the mounting surfaces (83), the corresponding mounting surface (83) is not provided with the ridges (84). It can also be configured. In addition, when the outer periphery (81) (82) of the joining interface (85) does not become the mounting surface (83), it is desirable to provide a ridge (84) on the entire outer periphery of the joining interface (85).

上記のように、本考案の発泡樹脂成形金型(10)は、異種発泡樹脂成形品(80)の接合界面(84)の接合強度を可及的に高めることのできる隆起条(84)を形成することができる。   As described above, the foamed resin molding die (10) of the present invention has a raised strip (84) that can increase the joint strength of the joint interface (84) of the different foamed resin molded product (80) as much as possible. Can be formed.

また、上記のように、本考案の異種発泡樹脂成形品(80)は、接合界面(85)の外周(81)に隆起条(84)を有することで、接合界面(85)の面積を大きくでき、その接合強度を可及的に高めることができる。   In addition, as described above, the dissimilar foamed resin molded product (80) of the present invention has the ridge (84) on the outer periphery (81) of the joining interface (85), thereby increasing the area of the joining interface (85). The bonding strength can be increased as much as possible.

本考案は、異種発泡樹脂材料どうしの接合界面における接合強度を高めることのできる発泡樹脂成形金型及び異種発泡樹脂成形品として有用である。   INDUSTRIAL APPLICABILITY The present invention is useful as a foamed resin molding die and a different type of foamed resin molded product that can increase the joint strength at the joint interface between different kinds of foamed resin materials.

(10) 発泡樹脂成形金型
(12) キャビティ
(20) 固定型
(22) 側溝
(30) 可動型
(32) 底溝
(40) シャッター
(50) 第１発泡樹脂材料(粒子)
(60) 第２発泡樹脂材料(粒子)
(80) 異種発泡樹脂成形品
(84) 隆起条
(85) 接合界面 (10) Foamed resin mold
(12) Cavity
(20) Fixed type
(22) Side groove
(30) Movable type
(32) Bottom groove
(40) Shutter
(50) First foamed resin material (particles)
(60) Second foamed resin material (particles)
(80) Different types of foamed resin molded products
(84) Uplift
(85) Bonding interface

Claims (7)

固定型と可動型により形成されたキャビティと、
固定型側から可動型に対してスライド可能に出没してキャビティを仕切るシャッターを具え、
該シャッターによって仕切られた第１キャビティと第２キャビティに、発泡倍率の異なる発泡樹脂材料からなる第１発泡樹脂粒子と第２発泡樹脂粒子を夫々充填し、シャッターをスライド開放して加熱することにより、発泡倍率の異なる発泡樹脂を連続的に成形する発泡樹脂成形金型であって、
前記固定型の内面に凹設され、前記シャッターの側部が嵌まる側溝と、
前記可動型の内面に凹設され、前記シャッターの先端が嵌まる底溝と、
を有し、
前記側溝と底溝は、シャッターをスライド開放して加熱したときに、何れかの発泡樹脂材料が侵入する幅である、
ことを特徴とする発泡樹脂成形金型。 A cavity formed by a fixed mold and a movable mold;
Provided with a shutter that slidably moves from the fixed mold side to the movable mold to partition the cavity,
By filling the first cavity and the second cavity partitioned by the shutter with the first foamed resin particles and the second foamed resin particles made of foamed resin materials having different foaming ratios, respectively, and by opening the shutter and heating it. A foamed resin molding die for continuously molding foamed resins having different foaming ratios,
A side groove recessed in the inner surface of the fixed mold and into which a side portion of the shutter is fitted;
A bottom groove recessed in the inner surface of the movable mold, into which the tip of the shutter fits,
Have
The side groove and the bottom groove are widths into which any foamed resin material enters when heated by sliding the shutter open.
A foamed resin molding die characterized by that. 前記第１発泡樹脂粒子は、第２発泡樹脂粒子よりも小粒径であり、
前記側溝及び底溝は、シャッターを開放したときに、第１発泡樹脂粒子が侵入可能な幅を有する請求項１に記載の発泡樹脂成形金型。 The first foamed resin particles have a smaller particle size than the second foamed resin particles,
2. The foamed resin molding die according to claim 1, wherein the side groove and the bottom groove have a width that allows the first foamed resin particles to enter when the shutter is opened. 前記第１発泡樹脂粒子は、第２発泡樹脂粒子よりも低発泡倍率の発泡樹脂材料であり、
前記側溝及び底溝は、シャッターを開放したときに、第１発泡樹脂粒子が侵入可能な幅を有する請求項１又は請求項２に記載の発泡樹脂成形金型。 The first foamed resin particles are a foamed resin material having a lower expansion ratio than the second foamed resin particles,
The foamed resin molding die according to claim 1 or 2, wherein the side groove and the bottom groove have a width that allows the first foamed resin particles to enter when the shutter is opened. 発泡倍率の異なる第１発泡樹脂材料と第２発泡樹脂材料を連続的に成形してなる異種発泡樹脂成形品であって、
第１発泡樹脂材料と第２発泡樹脂材料との接合界面は、外周に第１発泡樹脂材料がはみ出た隆起条が形成されていることを特徴とする異種発泡樹脂成形品。 A different type of foamed resin molded product obtained by continuously molding a first foamed resin material and a second foamed resin material having different foaming ratios,
The joint interface between the first foamed resin material and the second foamed resin material is a dissimilar foamed resin molded product characterized in that a ridge that protrudes from the first foamed resin material is formed on the outer periphery. 物品への取付面には、前記隆起条は形成されない請求項４に記載の異種発泡樹脂成形品。   The dissimilar foamed resin molded product according to claim 4, wherein the raised ridge is not formed on an attachment surface to an article. 前記第１発泡樹脂材料は、第２発泡樹脂材料よりも小粒径発泡樹脂粒子を発泡成形したものである請求項４又は請求項５に記載の異種発泡樹脂成形品。   The different-type foamed resin molded product according to claim 4 or 5, wherein the first foamed resin material is obtained by foam-molding foamed resin particles having a smaller particle diameter than the second foamed resin material. 前記第１発泡樹脂材料は、第２発泡樹脂材料よりも低発泡倍率の発泡樹脂材料である請求項４乃至請求項６の何れかに記載の異種発泡樹脂成形品。   The said 1st foamed resin material is a different foamed resin molded product in any one of Claims 4 thru | or 6 which is a foamed resin material of a low foaming ratio than a 2nd foamed resin material.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014168901A (en) * 2013-03-04 2014-09-18 Sekisui Plastics Co Ltd Method for molding foamed molding

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014168901A (en) * 2013-03-04 2014-09-18 Sekisui Plastics Co Ltd Method for molding foamed molding

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