JPS62187018A - Manufacture of foaming molded product - Google Patents
Manufacture of foaming molded productInfo
- Publication number
- JPS62187018A JPS62187018A JP61027889A JP2788986A JPS62187018A JP S62187018 A JPS62187018 A JP S62187018A JP 61027889 A JP61027889 A JP 61027889A JP 2788986 A JP2788986 A JP 2788986A JP S62187018 A JPS62187018 A JP S62187018A
- Authority
- JP
- Japan
- Prior art keywords
- cavity
- resin particles
- steam
- molded product
- filling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000005187 foaming Methods 0.000 title abstract description 5
- 239000002245 particle Substances 0.000 claims abstract description 37
- 239000011347 resin Substances 0.000 claims abstract description 30
- 229920005989 resin Polymers 0.000 claims abstract description 30
- 238000000465 moulding Methods 0.000 claims abstract description 5
- 239000006260 foam Substances 0.000 claims description 11
- 229920001169 thermoplastic Polymers 0.000 claims description 5
- 239000004416 thermosoftening plastic Substances 0.000 claims description 5
- 239000004793 Polystyrene Substances 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 3
- 230000006837 decompression Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000009826 distribution Methods 0.000 abstract description 3
- 238000010097 foam moulding Methods 0.000 abstract 1
- 239000000498 cooling water Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 4
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000001273 butane Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- SKDFWEPBABSFMG-UHFFFAOYSA-N 1,2-dichloro-1,1-difluoroethane Chemical compound FC(F)(Cl)CCl SKDFWEPBABSFMG-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920006248 expandable polystyrene Polymers 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910001872 inorganic gas Inorganic materials 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Abstract
Description
本発明は断熱建材、包装緩衝材，自動車バンパーの芯材
等に用いて有用な発泡成形体の製造方法に関する。The present invention relates to a method for producing a foamed molded product useful for use in insulating building materials, packaging cushioning materials, core materials for automobile bumpers, and the like.
ブタン，ペンタン，ジクロロジフルオロエタン等の有機
膨張剤を含有，もしくは加熱無機ガスを圧入したボリス
チレン，ポリプロピレン、架橋ポリエチレン、ポリメチ
ルメタクリレート等の熱可塑性予備発泡樹脂粒子を用い
て発泡成形体を製造するには、スチーム導入孔を設けた
雌雄１対の割型を用い，この両割型を完全に型締めしな
いで両割型の接合面間に１〜３膿程度の隙間をもたせて
置き、両割型によって形成されたキャビティ内に予備発
泡樹脂粒子を圧縮空気で充填し、圧縮空気は両割型の隙
間及び蒸気孔を経てドレンラインより排出される。 そ
して、充填完了後に両割型を完全に型締めする。 次い
で、スチームを．先ず雌割型のチャンバー内に導入して
、予備発泡樹脂粒子間に残存する空気を型外に排出した
後、スチームを両割型のチャンバー内に導入して予備発
泡樹脂粒子を発泡させると共に、該樹脂粒子同士を相互
に融着させて発泡成形体を得、次に、上記両チャンバー
内に冷却水を導入してキャビティ内の発泡成形体を冷却
し、型開きして発泡製品を取出す方法が一般に行なわれ
ている。
（発明が解決しようとする問題点］
上記従来の製造方法では、予備発泡樹脂粒子の充填が大
気圧下で行なわれているため、クラッキング作業に要す
る時間と相乗して充填に時間がかかり、又、クラッキン
グにより過充填となってプレス方向の密度が高くなり、
成形サイクルが長くなることは避けられず、また、キャ
ビティの間隙が狭い箇所においてはキャビティ内に予備
発泡樹脂粒子を均一に充填することが困難であって、製
造された発泡成形体の密度分布にむらが生じ、製品の品
質を低下させるという問題があった。To produce a foam molded article using thermoplastic pre-expanded resin particles such as polystyrene, polypropylene, crosslinked polyethylene, polymethyl methacrylate, etc. containing an organic expansion agent such as butane, pentane, dichlorodifluoroethane, etc., or pressurized with heated inorganic gas. Using a pair of male and female split molds with steam introduction holes, the two split molds are placed with a gap of about 1 to 3 mm between the joint surfaces of the two split molds without being completely clamped. The pre-expanded resin particles are filled with compressed air into the cavity formed by the method, and the compressed air is discharged from the drain line through the gap between the two split molds and the steam hole. Then, after filling is completed, the two split molds are completely clamped. Next, steam. First, the pre-foamed resin particles are introduced into a female-split chamber and the air remaining between the pre-foamed resin particles is discharged outside the mold, and then steam is introduced into the double-split chamber to foam the pre-foamed resin particles. A method of obtaining a foamed product by fusing the resin particles to each other, then introducing cooling water into both chambers to cool the foamed product in the cavity, and opening the mold to take out the foamed product. is commonly practiced. (Problems to be Solved by the Invention) In the above-mentioned conventional manufacturing method, since the filling of pre-expanded resin particles is carried out under atmospheric pressure, the filling takes a long time due to the time required for the cracking operation. , Cracking causes overfilling and increases the density in the pressing direction.
It is unavoidable that the molding cycle becomes longer, and in places where the gap between the cavities is narrow, it is difficult to uniformly fill the pre-expanded resin particles into the cavity, which may affect the density distribution of the produced foam molded product. There was a problem that unevenness occurred and the quality of the product deteriorated.
【問題点を解決するための手段１
本発明は上記の問題を解決したものであって、その目的
は成形サイクルの短縮を図ると同時に、予備発泡樹脂粒
子がキャビティ内に均一に行きわたって充填できるよう
に改良した発泡成形体の製造方法を提供することにある
。
しかして、本発明の上記目的は減圧室を兼ねるチャンバ
ーを備えた雌金型と充填ガンを備えた雄金型よりなる成
形金型を用い、この雌雄両金型を型締めして形成された
キャビティ内に、該キャビティ内が減圧されている状態
で上記充填ガンを用いて熱可塑性予測発泡樹脂粒子を充
填し、この充填が完了した時点で直ちに加熱スチームを
キャビティ内に導入して、上記予備発泡粒子を加熱発泡
させて該粒子同士を相互に融着させて発泡成形体を得る
ようにした発泡成形体の製造方法により達成される。
【実 施 例】
以下に５本発明製造方法を添付図面に示した工程順にし
たがって説明する。
本製造方法に用いられる成形金型としては、第１図に示
す如く加熱及び冷却媒体を導入するチャンバー１ａ、２
ａをそれぞれ有する雌金型１と雄金型２の１対よりなる
割型が用いられ、この雌雄両金型１，２には多数のスチ
ーム導入孔３，４を設けである。 雌雄両金型１，２の
各チャンバーｌａ、２ａにはスチーム管５，６．冷却水
管７゜８及び排水管９，１０がそれぞれ接続され、雌金
型１側の排水管９には吸気管１１が分岐接続されている
一方、雄金型２側の排水管１０には必要に応じて吸気管
１２が分岐接続される。 これらの管５，６，７，８，
９，１０，１１，１２は開閉弁５ａ、６ａ、７ａ、８ａ
、９ａ、１０ａ、１１ａ、１２ａによって開閉自在とさ
れ、雄金型２には予備発泡樹脂粒子の充填ガン１３が装
着されている。
先ず、第１図に示す第１工程では、雌雄両金型１．２を
完全に型締めして吸気管１１．１２のみ（又は吸気管１
１のみ或いは吸気管１２のみ）を開作動し、真空ポンプ
（図示せず）によってチャンバー１ａ、２ａ （又はチ
ャンバー１ａ或いはチャンバー２８のみ）内を負圧下に
置き、該チャンバー１ａ、２ａ（又はチャンバー１ａ或
いはチャンバー２８のみ）に連通ずるスチーム導入孔３
゜４（又はスチーム導入孔３或いはスチーム導入孔４）
を通してキャビティ１４内を−２〜−６５０ｏｎ）１ｇ
に減圧する。 次いで、第２図に示す第２工程では、吸
気管１１．１２ （又は吸気管１１或いは吸気管１２）
の開閉弁１１ａ、１２ａ （又は開閉弁１１ａ或いは開
閉弁１２ａ）を開作動したままの状態、即ち、キャビテ
ィ１４内が減圧されている状態で該キャビティ１４内に
充填ガン１３によって予備発泡樹脂粒子１５を充填し、
この充填が完了した時点で開閉弁１１ａ、１２ａ （又
は開閉弁１１ａ或いは開閉弁１２ａ）を閉作動する。
次の第３工程では、スチーム管５（又はスチーム管６）
の開閉弁５ａ（又は開閉弁６ａ）のみを開作動して、チ
ャンバー１ａ（又はチャンバー２ａ）内にスチームを導
入し、チャンバー１ａ（又はチャンバー２ａ）に連通ず
るスチーム導入孔３（又はスチーム導入孔４）を通して
加熱スチームをキャビティ１４内に導く。 次いで、ス
チーム管６（又はスチーム管５）の開閉弁６ａ（又は開
閉弁５ａ）のみを開作動してチャンバー２ａ（又はチャ
ンバー１ａ）内にスチームを導入し、チャンバー２ａ（
又はチャンバー１ａ）内に連通ずるスチーム導入孔４（
又はスチーム導入孔３）を通して加熱スチームをキャビ
ティ１４内に導き、予備発泡樹脂粒子１５を加熱発泡さ
せると共に、該粒子１５同士を相互に融着させ、発泡体
を成形する。
次の第４工程では、冷却水管７，８と排水管９゜１０の
開閉弁７ａ、８ａ、９ａ、１０ａのみを開作動し、両チ
ャンバー１ａ、２ａ内に導入した冷却水によってキャビ
ティ１４内の発泡体を冷却する。 この冷却工程では、
キャビティｌａ、２ａ内の冷却水を排出した後に、吸気
管１１．１２の開閉弁１１ａ、１２ａのみ開作動し、チ
ャンバーｌａ、２ａ内を減圧することによって冷却時間
は短縮される。 この冷却作業が完了した後の第３図に
示す第５工程では、排水管９，１０の開閉弁９ａ、１０
ａのみを開作動下に置いたままで雌雄両金型１，２の型
開きを行ない、離型ピン（図示せず）の作動又は離型エ
アーの噴射等による通常の離型手段によって発泡成形体
１６を取出し、製造作業は完了する。
しかして、本製造方法に用いられる予備発泡樹脂粒子と
しては、ポリスチレン、ポリプロピレン。
ポリエチレン等の密度が８〜６５０ｇ／１２である粒子
を用いる。 図示の場合、吸気管１１と吸気管１２は排
水管９，１０にそれぞれ分岐させて設けたが、これは直
接チャンバー１ａ、２ａに接続して実施できることは勿
論である。
次に１本発明製造方法と従来製造方法を比較するため、
その製造例を実施例■、比較例■として以下に説明し、
各々のデータを後記比較衣に示す。
実施例■
粒径が０．８〜１．２ｎ１１、ブタンを６．９重量％含
有する発泡性ポリスチレン粒子の表面に、常法にしたが
って０１１重量％のステアリン酸亜鉛及び０．０６重量
％のグリセリンモノステアレー１へを付着させた後、１
．０ｋｇ／ａ＃Ｇのスチームで５５倍に予備発泡し、得
られた予備発泡樹脂粒子を室温で２４時間養生させた。
この予備発泡樹脂粒子を金型のキャビティ内に、該キ
ャビティ内を一５００ｍｍＨｇの減圧下に４秒かけて充
填し、０．７ｋｇ／ｄＧのスチームで８秒間加熱した後
に１５秒間水冷し、更に５０秒間放冷して縦３００■、
横３００ｍ５＋、高さ１２５閣、肉厚２５閣の容器状の
発泡成形体を製造した。 この発泡成形体は美麗な外観
を有し、かつ、破断面の融着は９５％であった。
比較例Ｔ
上記実施例Ｉと同様な予備発泡樹脂粒子を用い。
この予備発泡樹脂粒子を、２ｍの隙間を残して型締めし
た金型のキャビティ内に５秒かけて充填し、完全に型締
めを行なった。 次いで、雄金型側よりスチームを２秒
間キャビティ内に供給し、予備発泡樹脂粒子間に残存す
る空気を型外へ排出した後、 ０ 、７ ｋｇ／ｄ
Ｇのスチームで１０秒間加熱し。
次に、１５秒間水冷して更に５５秒間放冷し、縦３００
ｍ、横３ｏＯｗｎ、高さ１２５＋＋ｍ、肉厚２５閣の容
器状の発泡成形体を製造した。 この発泡成形体は美麗
な外観を有し、かつ、破断面の融着は８５％であった。
（比較衣）
【発明の効果１
本発明は上記の如くであって、クランキング工程の省略
と相俟って予備発泡樹脂粒子の充填に要する時間を短く
することができ、前掲した比較表に見られるように全体
的な成形サイクルを大巾に短縮できる利点があり、融着
率は向上すると同時に密度分布の均一化を達成でき１強
度に優れた品質の良好な発泡成形体を製造できる効果が
ある。[Means for Solving the Problems 1] The present invention solves the above problems, and its purpose is to shorten the molding cycle and at the same time fill the pre-expanded resin particles uniformly within the cavity. It is an object of the present invention to provide a method for manufacturing a foamed molded article that is improved so as to make it possible to produce a foamed molded article. Therefore, the above-mentioned object of the present invention is to use a mold consisting of a female mold having a chamber that also serves as a decompression chamber and a male mold having a filling gun, and to clamp the male and female molds to form a mold. The thermoplastic predicted foamed resin particles are filled into the cavity using the filling gun while the pressure inside the cavity is reduced. Immediately after this filling is completed, heated steam is introduced into the cavity to fill the above reserve. This is achieved by a method for producing a foamed molded article in which a foamed molded article is obtained by heating and foaming expanded particles to fuse the particles to each other. [Example] Five manufacturing methods of the present invention will be explained below in the order of steps shown in the attached drawings. As shown in FIG. 1, the molds used in this manufacturing method include chambers 1a and 2 into which heating and cooling media are introduced.
A split mold consisting of a pair of female molds 1 and male molds 2, each having a diameter of 1.a, is used, and both the male and female molds 1, 2 are provided with a large number of steam introduction holes 3, 4. Steam pipes 5, 6, . A cooling water pipe 7°8 and drain pipes 9 and 10 are connected to each other, and an intake pipe 11 is branched to the drain pipe 9 on the female mold 1 side, while a drain pipe 10 on the male mold 2 side is connected to the drain pipe 10. The intake pipe 12 is branched and connected accordingly. These tubes 5, 6, 7, 8,
9, 10, 11, 12 are on-off valves 5a, 6a, 7a, 8a
, 9a, 10a, 11a, and 12a, and the male mold 2 is equipped with a filling gun 13 for pre-expanded resin particles. First, in the first step shown in FIG.
1 or only the intake pipe 12), the chambers 1a and 2a (or only the chamber 1a or the chamber 28) are placed under negative pressure by a vacuum pump (not shown), and the chambers 1a and 2a (or only the chamber 1a) are opened. Alternatively, the steam introduction hole 3 communicating with the chamber 28 only)
゜4 (or steam introduction hole 3 or steam introduction hole 4)
-2 to -650 on) 1g inside the cavity 14 through
Reduce the pressure to Next, in the second step shown in FIG. 2, the intake pipe 11, 12 (or intake pipe 11 or intake pipe 12)
While the on-off valves 11a and 12a (or the on-off valve 11a or the on-off valve 12a) are kept open, that is, the pressure inside the cavity 14 is reduced, the pre-expanded resin particles 15 are filled into the cavity 14 by the filling gun 13. Fill it with
When this filling is completed, the on-off valves 11a and 12a (or on-off valve 11a or on-off valve 12a) are closed. In the next third step, the steam pipe 5 (or steam pipe 6)
Steam is introduced into the chamber 1a (or chamber 2a) by opening only the on-off valve 5a (or on-off valve 6a), and the steam introduction hole 3 (or steam introduction hole) communicating with the chamber 1a (or chamber 2a) is opened. 4) to introduce heated steam into the cavity 14. Next, only the on-off valve 6a (or on-off valve 5a) of the steam pipe 6 (or steam pipe 5) is opened to introduce steam into the chamber 2a (or chamber 1a), and the steam is introduced into the chamber 2a (or chamber 1a).
Alternatively, the steam introduction hole 4 (
Alternatively, heated steam is introduced into the cavity 14 through the steam introduction hole 3) to heat and foam the pre-foamed resin particles 15, and the particles 15 are fused together to form a foamed body. In the next fourth step, only the on-off valves 7a, 8a, 9a and 10a of the cooling water pipes 7 and 8 and the drain pipes 9 and 10 are opened, and the cooling water introduced into both chambers 1a and 2a is used to cool the cavity 14. Cool the foam. In this cooling process,
After the cooling water in the cavities la, 2a is discharged, only the on-off valves 11a, 12a of the intake pipes 11.12 are opened and the pressure inside the chambers la, 2a is reduced, thereby shortening the cooling time. In the fifth step shown in FIG. 3 after this cooling work is completed, the on-off valves 9a, 10 of the drain pipes 9, 10
Open the male and female molds 1 and 2 while leaving only a under the opening operation, and then release the foam molded product by normal mold release means such as actuation of a mold release pin (not shown) or injection of mold release air. 16 is taken out, and the manufacturing operation is completed. Therefore, the pre-expanded resin particles used in this manufacturing method include polystyrene and polypropylene. Particles such as polyethylene having a density of 8 to 650 g/12 are used. In the illustrated case, the intake pipe 11 and the intake pipe 12 are branched into drain pipes 9 and 10, respectively, but this can of course be implemented by directly connecting them to the chambers 1a and 2a. Next, in order to compare the manufacturing method of the present invention and the conventional manufacturing method,
The production examples will be explained below as Example (■) and Comparative Example (■),
Each data is shown in the comparison section below. Example ■ 0.11% by weight of zinc stearate and 0.06% by weight of glycerin were applied to the surface of expandable polystyrene particles having a particle size of 0.8 to 1.2n11 and containing 6.9% by weight of butane according to a conventional method. After attaching to monostair 1, 1
．． The resin particles were pre-foamed 55 times with steam at 0 kg/a#G, and the obtained pre-foamed resin particles were cured at room temperature for 24 hours. The pre-expanded resin particles were filled into the cavity of the mold over 4 seconds under reduced pressure of -500 mmHg, heated with 0.7 kg/dG steam for 8 seconds, cooled with water for 15 seconds, and then Leave to cool for seconds, length 30cm,
A container-shaped foam molded body with a width of 300 m5+, a height of 125 m, and a wall thickness of 25 m was produced. This foamed molded product had a beautiful appearance, and the fusion of the fractured surface was 95%. Comparative Example T Using the same pre-expanded resin particles as in Example I above. The pre-expanded resin particles were filled into the cavity of the clamped mold for 5 seconds, leaving a gap of 2 m, and the mold was completely clamped. Next, steam was supplied into the cavity from the male mold side for 2 seconds to exhaust the air remaining between the pre-foamed resin particles to the outside of the mold, and then the mold was heated to 0.7 kg/d.
Heat with G steam for 10 seconds. Next, water cooled for 15 seconds, left to cool for another 55 seconds, and
A container-shaped foamed molded product with a width of 30m, a height of 125++m, and a wall thickness of 25cm was produced. This foamed molded product had a beautiful appearance, and the fusion of the fractured surface was 85%. (Comparative clothing) [Effect of the invention 1] The present invention is as described above, and together with the omission of the cranking process, the time required for filling the pre-expanded resin particles can be shortened, and the results shown in the comparison table shown above can be reduced. As can be seen, it has the advantage of greatly shortening the overall molding cycle, improving the fusion rate, and at the same time achieving uniform density distribution. 1. The effect of producing high-quality foam molded products with excellent strength. There is.
図面は本発明製造方法を説明するためのもので。
第１図は型締め減圧工程を示す断面図、第２図は予備発
泡樹脂粒子の充填状態を示す断面図、第３図は型開きし
て製品を取出す状態を示す断面図である。
図中、１は雌金型、１ａはチャンバー、２は雄金型、２
ａはチャンバー、３，４はスチーム導入孔、５．６はス
チーム管、７，８は冷却水管、９゜１０は排水管、１１
．１２は吸気管、１３は充填ガン、１４はキャビティ、
１５は予備発泡樹脂粒子である。
第１図
苛３ｒＩＩThe drawings are for explaining the manufacturing method of the present invention. FIG. 1 is a sectional view showing the mold clamping and depressurizing process, FIG. 2 is a sectional view showing the filling state of pre-expanded resin particles, and FIG. 3 is a sectional view showing the state of opening the mold and taking out the product. In the figure, 1 is a female mold, 1a is a chamber, 2 is a male mold, 2
a is a chamber, 3 and 4 are steam introduction holes, 5.6 is a steam pipe, 7 and 8 are cooling water pipes, 9゜10 is a drain pipe, 11
．． 12 is an intake pipe, 13 is a filling gun, 14 is a cavity,
15 is pre-foamed resin particles. Figure 1 3rII
Claims (3)
ガンを備えた雄金型よりなる成形金型を用い、この雌雄
両金型を型締めして形成されたキャビティ内に、該キャ
ビティ内が減圧されている状態で上記充填ガンを用いて
熱可塑性予備発泡樹脂粒子を充填し、この充填が完了し
た時点で直ちに加熱スチームをキャビティ内に導入して
、上記予備発泡樹脂粒子を加熱発泡させて該粒子同士を
相互に融着させて発泡成形体を得ることを特徴とする発
泡成形体の製造方法。(1) Using a molding mold consisting of a female mold equipped with a chamber that also serves as a decompression chamber and a male mold equipped with a filling gun, the male and female molds are clamped together to form a cavity. The thermoplastic pre-expanded resin particles are filled using the above-mentioned filling gun while the inside of the cavity is under reduced pressure, and when this filling is completed, heated steam is immediately introduced into the cavity to heat and foam the pre-expanded resin particles. A method for producing a foam molded article, which comprises obtaining a foam molded article by fusing the particles to each other.
レンであることを特徴とする前記特許請求の範囲第（１
）項記載の発泡成形体の製造方法。(2) The material resin of the thermoplastic pre-expanded resin particles is polystyrene.
) The method for producing a foamed molded article according to item 2.
するときの該キャビティ内の圧力が２〜６５０ｍｍＨｇ
であることを特徴とする前記特許請求の範囲第（１）項
記載の発泡成形体の製造方法。(3) The pressure inside the cavity when filling the cavity with thermoplastic pre-expanded resin particles is 2 to 650 mmHg.
A method for producing a foamed molded article according to claim (1), characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61027889A JPS62187018A (en) | 1986-02-13 | 1986-02-13 | Manufacture of foaming molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61027889A JPS62187018A (en) | 1986-02-13 | 1986-02-13 | Manufacture of foaming molded product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62187018A true JPS62187018A (en) | 1987-08-15 |
Family
ID=12233457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61027889A Pending JPS62187018A (en) | 1986-02-13 | 1986-02-13 | Manufacture of foaming molded product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62187018A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8534006B2 (en) | 2002-05-02 | 2013-09-17 | Hussmann Corporation | Merchandisers having anti-fog coatings and methods for making the same |
-
1986
- 1986-02-13 JP JP61027889A patent/JPS62187018A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8534006B2 (en) | 2002-05-02 | 2013-09-17 | Hussmann Corporation | Merchandisers having anti-fog coatings and methods for making the same |
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