JPH07195536A - Production of foam molded piece with skin - Google Patents
Production of foam molded piece with skinInfo
- Publication number
- JPH07195536A JPH07195536A JP5349796A JP34979693A JPH07195536A JP H07195536 A JPH07195536 A JP H07195536A JP 5349796 A JP5349796 A JP 5349796A JP 34979693 A JP34979693 A JP 34979693A JP H07195536 A JPH07195536 A JP H07195536A
- Authority
- JP
- Japan
- Prior art keywords
- steam
- pin
- blow
- foam
- molding
- 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.)
- Granted
Links
- 239000006260 foam Substances 0.000 title claims abstract description 22
- 239000011324 bead Substances 0.000 claims abstract description 28
- 238000000071 blow moulding Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims description 24
- 238000000465 moulding Methods 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims 1
- 238000010097 foam moulding Methods 0.000 abstract description 10
- 238000007664 blowing Methods 0.000 abstract description 6
- 238000005187 foaming Methods 0.000 description 7
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 229920005672 polyolefin resin Polymers 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 229920006248 expandable polystyrene Polymers 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000013518 molded foam Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920006327 polystyrene foam Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/58—Blowing means
- B29C49/60—Blow-needles
-
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/36—Feeding the material to be shaped
- B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
- B29C44/44—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form
- B29C44/445—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form in the form of expandable granules, particles or beads
-
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/3415—Heating or cooling
- B29C44/3426—Heating by introducing steam in the mould
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/4273—Auxiliary operations after the blow-moulding operation not otherwise provided for
- B29C49/4283—Deforming the finished article
- B29C49/42834—Foaming, expanding or stretching the article
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、皮つき発泡成形体の成
形法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for molding a foamed molded article with skin.
【０００２】[0002]
【従来の技術とその課題】周知のごとく、発泡プラスチ
ック（単に発泡成形体ともいう）は現在、主として発泡
樹脂粒子（例えば、発泡ポリスチレン）を用いる成形法
と、液状発泡材（例えば、発泡ポリウレタン）を用いる
成形法との２系統によって成形が行われている。前者の
成形法は「型物発泡成形法」と呼ばれており、この型物
発泡成形法は、予備発泡樹脂粒子を金型に充填し、これ
に加熱水蒸気を吹込んで加熱・融着させる方法である
（例えば、特公平３−５６９０５号公報参照）。ところ
で、かかるいずれの発泡成形体でも、その表面を密にし
た皮つき発泡成形体が知られている（例えば、特公昭４
２−１０７５２号公報参照）。2. Description of the Related Art As is well known, foamed plastics (also simply referred to as foamed molded bodies) are currently manufactured by a molding method mainly using foamed resin particles (for example, foamed polystyrene) and liquid foamed materials (for example, foamed polyurethane). Molding is carried out by two systems including a molding method using The former molding method is called "mold foam molding method". This mold foam molding method is a method in which pre-expanded resin particles are filled in a mold and heated steam is blown into the mold to heat and fuse it. (See, for example, Japanese Patent Publication No. 3-56905). By the way, in any of the foamed molded articles, a foamed molded article with a skin having a dense surface is known (for example, Japanese Patent Publication No.
No. 2-10752).
【０００３】かかる皮つき発泡成形体を成形するには、
大別して次の３つの方法が用いられる。In order to mold such a foamed molded product with skin,
Broadly classified, the following three methods are used.
【０００４】第１の方法；表皮を構成する非発泡性パリ
ソンを、ブロ−成形用金型内でブロ−成形した後、冷却
固化して中空成形体にし、これをブロ−成形用金型から
取出し、この中空成形体に予備発泡樹脂粒子（以下、本
明細書では、これと、予備発泡前の樹脂粒子とを合せて
単に発泡ビ−ズという。）を充填し、更に、これにスチ
−ムピンを挿入して、このスチ−ムピンより加熱水蒸気
を吹込んで発泡ビ−ズを加熱してさらに発泡させ、各ビ
−ズが互に融着する前にスチ−ムピンを抜取ることによ
り、皮つき発泡成形体を成形する方法（例えば、特公昭
６２−１９２３９号公報、特公昭５８−１０２１７号公
報、実公昭６２−９０７３号公報等参照）。First method: The non-foaming parison forming the skin is blow-molded in a blow-molding die and then cooled and solidified into a hollow molded body, which is blown from the blow-molding die. The hollow molded body was taken out and filled with pre-expanded resin particles (hereinafter, in the present specification, this and the resin particles before pre-expansion are simply referred to as a foam bead) and further filled with a steel. Insert the mupin, blow heated steam from the steam pin to heat the foam beads to further foam, and remove the steam pin before the beads are fused to each other. And a method for molding a foamed molded article (see, for example, Japanese Patent Publication No. 62-19239, Japanese Patent Publication No. 58-10217, and Japanese Utility Model Publication No. 62-9073).
【０００５】第２の方法；中空成形体を構成するパリソ
ンをブロ−成形用金型に密閉したまま、前述の発泡ポリ
ウレタン成形法の系統に準じて、そのパリソン内にウレ
タン等反応系発泡液体を加圧注入して、パリソンをブロ
−成形用金型の内面に沿わせた後、その型締めの状態で
パリソンを冷却固化させると共に、前記発泡液体を発泡
成形して皮つき発泡成形体を成形する方法（例えば、特
開昭５８−１１６１３５号公報、特開平３−２９３１１
３号公報等参照）。Second method: With the parison forming the hollow molded body sealed in a blow molding mold, a reaction system foaming liquid such as urethane is filled in the parison according to the system of the foamed polyurethane molding method described above. After pressure injection, the parison is made to follow the inner surface of the blow molding die, and the parison is cooled and solidified in the mold clamped state, and the foamed liquid is foam-molded to form a foam-molded body with skin. (For example, JP-A-58-116135 and JP-A-3-29311)
No. 3, etc.).
【０００６】第３の方法；本発明者らが既に提案した皮
つき発泡成形体の成形法であるが、通常のブロ−成形を
行う金型と、型物発泡成形を行う金型とを一つにして、
パリソンを通常のブロ−成形し、成形された中空成形体
に発泡ビ−ズを充填して加熱・融着することにより、皮
つき発泡成形体を成形する方法（特開平５−１３８７２
２号公報参照）。Third method: A method for forming a foamed molded product with skin, which has been already proposed by the present inventors, in which a mold for ordinary blow molding and a mold for foam molding of a molded product are combined. One way
A method for molding a parison with a skin, by subjecting a parison to an ordinary blow molding, filling the molded hollow molded body with foam beads, and heating and fusing the same (see JP-A-5-13872).
No. 2).
【０００７】ところで、前述の第１の方法においては、
加熱水蒸気の吹込みを良好にするため、中空成形体へ加
熱水蒸気を吹込むスチ−ムピンの挿入口を、ビ−ズ充填
口と兼用することにより、そのピン径より大径にし、加
熱水蒸気吹込み時に、中空成形体内の空気や低温の蒸気
を排出することが行われている（例えば、特開昭５０−
９２９６８号公報参照）。By the way, in the above-mentioned first method,
In order to improve the blowing of heated steam, the steam pin that blows heated steam into the hollow molded body also serves as a bead filling port so that the diameter of the steam pin is made larger than the diameter of the pin. At the time of charging, air or low-temperature steam is discharged from the hollow molded body (for example, Japanese Patent Laid-Open No. Sho 50-
92968).
【０００８】また、第２の方法においては、発泡液体の
加圧注入を良好にするため、中空成形体にエア抜きピン
を打込んで、中空成形体内の空気を排出しながら発泡液
体を加圧注入することが行われている。Further, in the second method, in order to improve the pressure injection of the foaming liquid, an air bleeding pin is driven into the hollow molded body to pressurize the foaming liquid while discharging the air in the hollow molded body. Injection is taking place.
【０００９】そこで、前述の第３の方法においても、発
泡ビ−ズの充填や加熱水蒸気の吹込みを良好にするた
め、第２の方法で採用されているようなエア抜きピンを
打込むことが考えられるが、エア抜きピンやスチ−ムピ
ンを多く設ければ、それだけ、皮つき発泡成形品の外観
を損なう、という問題があり、その代りに、これらのピ
ンを少なくすれば、中空成形体内の空気の排出不足や発
泡ビ−ズ充填不良を生じ、更には、蒸気排出不足のた
め、加熱水蒸気の流れを阻害して発泡ビ−ズの融着不良
を生じる、という問題があった。Therefore, also in the above-mentioned third method, in order to improve the filling of the foam beads and the blowing of the heated steam, the air-bleeding pin employed in the second method is driven. However, if more air bleeding pins and steam pins are provided, the external appearance of the foamed molded product with skin will be damaged by that much. Instead, if these pins are reduced, the hollow molded body There is a problem that the air is insufficiently discharged and the foam beads are not filled well, and furthermore, the steam discharge is insufficient and the flow of the heated steam is obstructed to cause defective fusion of the foam beads.
【００１０】[0010]
【課題を解決するための手段】そこで本発明は、前述の
第３の方法において加熱水蒸気の吹込み等を良好にし、
かつ、成形品にピン孔を少なくすることを目的とするも
ので、その目的達成の手段は、ブロ−成形用金型内で、
ブロ−ピンにより空気を吹込んでパリソンをブロ−成形
して中空成形体となし、該中空成形体に発泡ビ−ズを充
填した後、スチ−ムピンにより加熱水蒸気を吹込んで発
泡成形させる皮つき発泡成形体の成形法において、前記
中空成形体における、ブロ−またはスチ−ムピンに沿う
部位に、蒸気逃がし孔を開口して加熱水蒸気を吹込むこ
とを特徴とする皮つき発泡成形体の成形法にある。Therefore, according to the present invention, in the above-mentioned third method, the blowing of heated steam is improved,
And, the purpose is to reduce the pin holes in the molded product, the means of achieving the purpose, in the mold for blow molding,
Blow molding a parison by blowing air with a blow pin to form a hollow molded body, and after filling the hollow molded body with foam beads, blow steam with heated steam by a steam pin to foam and mold In the method for molding a molded body, a method for molding a foamed molded body with a skin, characterized in that, in the hollow molded body, a portion along a blower or a steam pin, a steam escape hole is opened to blow heated steam. is there.
【００１１】[0011]
【実施例】本発明の実施例を添付図１に示す工程図によ
り詳細に述べる。本発明の実施例によって製造される皮
つき発泡成形体は、例えば２５cm×４３cm角、厚さ３cm
の大きさの扁平板体であって、その外皮はポリエチレン
樹脂、発泡ビ−ズは発泡ポリスチレン樹脂を用いている
が、外皮にポリプロピレン等のポリオレフィン系樹脂、
ポリスチレン系樹脂、ポリ塩化ビニル樹脂、ＡＢＳ樹脂
等を用いてもよいし、発泡ビ−ズにポリエチレン系、ス
チレン改質ポリオレフィン系等を用いてもよい。Embodiments of the present invention will be described in detail with reference to the process chart shown in the attached FIG. The foamed molded product with skin manufactured according to the embodiment of the present invention has, for example, a 25 cm × 43 cm square and a thickness of 3 cm.
Is a flat plate having a size of, a polyethylene resin is used for the outer cover, and a polystyrene foam resin is used for the expanded beads, but a polyolefin resin such as polypropylene is used for the outer cover,
Polystyrene resin, polyvinyl chloride resin, ABS resin, etc. may be used, and polyethylene beads, styrene modified polyolefin resin, etc. may be used for the foam beads.
【００１２】図１において、（Ａ）図のように２つ割り
ブロ−成形用金型１，１は開かれており、これらの金型
１に上方から、中空成形体となるパリソン２が降下す
る。この金型１には、後述するスペ−ス形成治具５に合
う大きさの１個のピン挿入口３が設けられており、この
ピン挿入口３に、ブロ−兼スチ−ムピン４がセットされ
る。In FIG. 1, as shown in FIG. 1A, the halves for blow molding 1 and 1 are opened, and a parison 2 as a hollow molding is lowered from above these dies 1. To do. The die 1 is provided with one pin insertion opening 3 having a size suitable for a space forming jig 5 described later, and the blower / steam pin 4 is set in the pin insertion opening 3. To be done.
【００１３】このブロ−兼スチ−ムピン４には、その外
周に、このピン４を中空成形体２ａ内へ挿入した時に、
この中空成形体２ａとこのピン４との間の中空成形体２
ａに、スペ−スを形成するためのスペ−ス形成治具５が
ピン４に同心状で摺動自在に設けられている。このスペ
−ス形成治具５は尖鋭状先端をもつリング体で構成さ
れ、前記ピン挿入口３の内径より若干小になっている。
そして、これらのブロ−兼スチ−ムピン４やスペ−ス形
成治具５は、別々のエアシリンダ−６，７により金型１
に対し進退する。なお、前記パリソン２は形状が複雑な
場合には、金型１に降下・装填するときに、プリブロ−
されて低い内圧をもつようにしてもよい。The blower / steam pin 4 has an outer periphery, when the pin 4 is inserted into the hollow molded body 2a,
Hollow molded body 2 between this hollow molded body 2a and this pin 4
At a, a space forming jig 5 for forming a space is concentrically slidably provided on the pin 4. The space forming jig 5 is composed of a ring body having a sharp tip and is slightly smaller than the inner diameter of the pin insertion port 3.
The blower / steam pin 4 and the space forming jig 5 are connected to the mold 1 by separate air cylinders 6 and 7.
To go back and forth. If the parison 2 has a complicated shape, the pre-blowing is performed when the parison 2 is lowered and loaded into the mold 1.
The internal pressure may be low so that the internal pressure is low.
【００１４】次いで、（Ｂ）図のように２つ割りブロ−
成形用金型１，１が閉じると共に、ブロ−兼スチ−ムピ
ン４とスペ−ス形成治具５とを共に前進させて、ピン４
はパリソン２に突き刺さるように、また、スペ−ス形成
治具５は中空成形体部分を形成させないように、金型１
のキャビティ面より若干突出してピン挿入口３に位置さ
せる。そこで、ブロ−兼スチ−ムピン４から空気を吹込
んで、パリソン２をブロ−成形して、中空成形体２ａと
する。このブロ−成形による中空成形体２ａに、このス
ペ−ス形成治具５の後退によって、このピン４と中空成
形体２ａとの間のスペ−ス、すなわち、空気または蒸気
逃がし孔３ａが形成される。Then, as shown in FIG. 3B, a two-split blower is used.
When the molding dies 1 and 1 are closed, the blower / steam pin 4 and the space forming jig 5 are both advanced to move the pin 4
So as to pierce the parison 2 and the space forming jig 5 so as not to form a hollow molded body portion.
Is slightly protruded from the cavity surface of and is positioned in the pin insertion port 3. Therefore, air is blown from the blower / steam pin 4 to blow-mold the parison 2 to form a hollow molded body 2a. The space between the pin 4 and the hollow molded body 2a, that is, the air or vapor escape hole 3a is formed in the hollow molded body 2a formed by the blow molding by retracting the space forming jig 5. It
【００１５】次いで、（Ｃ）図のように、スペ−ス形成
治具５のみを後退させて蒸気逃がし孔３ａを開口させた
後、この中空成形体２ａの冷却途中で、通常の発泡ビ−
ズ充填ガン（不図示）により、約５０倍に予備発泡され
た発泡ビ−ズ８を充填する。Then, as shown in FIG. 3C, only the space forming jig 5 is retracted to open the vapor escape hole 3a, and then a normal foam bead is formed while the hollow molded body 2a is being cooled.
A foaming bead 8 pre-foamed about 50 times is filled by a filling gun (not shown).
【００１６】なお、本実施例においては、発泡ビ−ズ充
填前にスペ−ス形成治具５を 後退させて蒸気逃がし孔
３ａを開口し、充填エア−の排出を行い充填効率を高め
るようにしたが、蒸気逃がし孔３ａを開口しなくてもビ
−ズ充填が充分に行われる場合や、中空成形体内を吸引
する等の手段で充填エア−を排出する場合には、スペ−
ス形成治具５の後退による開口は、発泡ビ−ズ８の充填
前でなくても加熱発泡を始める前であればいつでもよ
く、要は加熱水蒸気吹込み時に開口されていればよい。In this embodiment, before filling the foam beads, the space forming jig 5 is retracted to open the vapor escape hole 3a, and the filling air is discharged to improve the filling efficiency. However, when the bead filling is sufficiently performed without opening the vapor escape hole 3a or when the filled air is discharged by a means such as sucking the hollow molded body, the space is
The opening by the retreat of the foam forming jig 5 may be performed before the foaming of the foam beads 8 and before the foaming by heating is started, and the point is that the opening is made when the heated steam is blown.
【００１７】なお、スペ−ス形成治具５としては、パリ
ソン２をブロ−成形する際には、金型１に設けたピン挿
入口３を塞いでいて、ビ−ズ充填時またはこの発泡ビ−
ズ８の発泡成形時には、ピン４と中空成形体２ａとの間
にスペ−スを形成させ得るものであればよく、例えば図
２に示すように、ピン４の外周を部分的に大径４ａとし
たものでもよく、また、ピン軸にラセン溝やスリット溝
を設けて蒸気を排出できるものでもよい。As the space forming jig 5, when the parison 2 is blow-molded, the pin insertion port 3 provided in the mold 1 is closed so that the beads are filled or the foam beads are formed. −
It is sufficient that the space between the pin 4 and the hollow molded body 2a can be formed at the time of foam-molding the skirt 8, for example, as shown in FIG. Alternatively, the pin shaft may be provided with a spiral groove or a slit groove for discharging steam.
【００１８】そして、ブロ−兼スチ−ム吹込みピン４
を、不図示の加熱水蒸気源に連通して、充填された発泡
ビ−ズ８に加熱水蒸気を吹込む。この加熱水蒸気の吹込
み時には、中空成形体２ａ内の空気や先に吹込まれて低
温の蒸気またはドレンを蒸気逃がし孔３ａから排出す
る。したがって、加熱水蒸気は発泡ビ−ズ８の間をスム
−ズに流れ発泡成形を良好にする。The blower / steam blow-in pin 4
Is communicated with a heating steam source (not shown), and the heating steam is blown into the filled foam beads 8. When the heated steam is blown in, the air in the hollow molded body 2a or the low-temperature steam or drain blown previously is discharged from the steam escape hole 3a. Therefore, the heated steam flows smoothly between the foam beads 8 to improve the foam molding.
【００１９】なお、本実施例ではブロ−ピンとスチ−ム
ピンを兼用し、中空成形体成形と同時に空気または蒸気
逃がし孔３ａを穿孔した例について説明したが、ブロ−
ピンとスチ−ムピンとを別々に設けてスチ−ムピン挿入
時にスペ−ス形成治具を進入させて、中空成形体２ａに
蒸気逃がし孔３ａを穿孔するようにしてもよい。In this embodiment, an example in which the blow pin and the steam pin are also used and the air or steam escape hole 3a is formed at the same time when the hollow molded body is formed is explained.
A pin and a steam pin may be separately provided, and a space forming jig may be inserted at the time of inserting the steam pin to form the steam escape hole 3a in the hollow molded body 2a.
【００２０】また、ブロ−ピンにのみにスペ−ス形成治
具５を設けて中空成形体成形と同時に空気または蒸気逃
がし孔３ａを形成し、ブロ−成形後に、このスペ−ス形
成治具５のみを後退させて開口した孔を空気や低温のド
レン、蒸気逃がし孔として使用して、このブロ−ピンは
バキュ−ムや排気に用いるようにしてもよい。更に付言
すれば、中空成形体にピンの跡を少なくするためには、
ブロ−ピンとピンを兼用するのが好ましいが、両ピンを
別々に設けるときは、スチ−ムピンの方にスペ−ス形成
治具を設けるのが好ましい。Further, the space forming jig 5 is provided only on the blow pin to form the air or vapor escape hole 3a at the same time when the hollow molded body is molded, and the space forming jig 5 is formed after the blow molding. It is also possible to use the hole that is opened by retreating only the air hole as a drain hole for air, low temperature, and steam, and use this blow pin for vacuum and exhaust. In addition, in order to reduce the traces of pins on the hollow molded body,
It is preferable to use both the blow pin and the pin, but when both pins are provided separately, it is preferable to provide the space forming jig on the steam pin.
【００２１】[0021]
【発明の効果】本発明によれば、ブロ−成形用金型と型
物発泡成形用金型とを一つにして皮つき発泡成形体を成
形するので、設備および成形工程を節約することがで
き、しかも、ブロ−またはスチ−ムピンに沿う中空成形
体の部位に蒸気逃がし孔を開口したので、発泡成形時に
中空成形体内の空気や低温のドレンを排出することがで
き、加熱水蒸気の流れをスム−ズにして、発泡成形を良
好にすることができるのは勿論、ピンに沿って開口した
ので、ピン孔を少なくしながら蒸気逃がし孔が容易に形
成できて、前記成形工程の節約に資することができる。
なお、空気または蒸気逃がし孔をビ−ズ充填時に開口さ
せてスペ−スを設ければ、ビ−ズ充填を効率よく行うこ
ともできる。According to the present invention, a blow molding mold and a mold foam molding mold are integrated to mold a skin-molded foam molding, so that equipment and molding steps can be saved. In addition, since a steam escape hole is opened in the hollow molded body along the blow or steam pin, air and low-temperature drain in the hollow molded body can be discharged during foam molding, and the flow of heated steam can be improved. In addition to making it smooth and improving the foam molding, since it opens along the pin, the steam escape hole can be easily formed while reducing the pin hole, which contributes to the saving of the molding step. be able to.
If a space is provided by opening the air or vapor escape hole at the time of bead filling, the bead filling can be performed efficiently.
【図１】本発明の実施例の工程図である。FIG. 1 is a process drawing of an example of the present invention.
【図２】本発明に用いる他の実施例のピンである。FIG. 2 is a pin of another embodiment used in the present invention.
１…金型、２…パリソン、２ａ…中空成形体、３ａ…蒸
気逃がし孔、４…ブロ−兼スチ−ムピン、５…スペ−ス
形成治具DESCRIPTION OF SYMBOLS 1 ... Mold, 2 ... Parison, 2a ... Hollow molded body, 3a ... Steam escape hole, 4 ... Blow and steam pin, 5 ... Space forming jig
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ２９Ｃ 44/00 // Ｂ２９Ｃ 49/60 7619−4Ｆ 49/62 7619−4Ｆ Ｂ２９Ｋ 105:04 (72)発明者 山路 弘行 三重県四日市市川尻町1000番地 三菱油化 バ−デ イツシエ株式会社内 (72)発明者 畠山 芳和 新潟県三条市南四日町四丁目８番６−１号 三光総業 株式会社内 (72)発明者 志田 祥幸 新潟県三条市南四日町四丁目８番６−１号 三光総業 株式会社内 (72)発明者 田村 敦 東京都品川区東五反田１丁目14番地 アロ ン化成株 式会社内 (72)発明者 北岡 内匠 東京都品川区東五反田１丁目14番地 アロ ン化成株 式会社内 (72)発明者 小浜 隆 東京都品川区東五反田１丁目14番地 アロ ン化成株 式会社内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location B29C 44/00 // B29C 49/60 7619-4F 49/62 7619-4F B29K 105: 04 (72 ) Inventor Hiroyuki Yamaji 1000 Kawajiri-cho, Yokkaichi-shi, Mie Mitsubishi Petrochemical Variety Co., Ltd. (72) Inventor Yoshikazu Hatakeyama 4-6-1, Minami-Yokaka-cho, Sanjo-shi, Niigata Sanko Sogyo Co., Ltd. (72) Inventor Yoshiyuki Shida 4-6-1 Minami-Yokkamachi, Sanjo-shi, Niigata Sanko Sogyo Co., Ltd. (72) Inventor Atsushi Tamura 1-14, Higashigotanda, Shinagawa-ku, Tokyo Aron Kasei Co., Ltd. In-house (72) Inventor Kitaoka Takumi 1-14 Higashi-Gotanda, Shinagawa-ku, Tokyo Aron Kasei Co., Ltd. In-house (72) Inventor Takashi Obama 1-1-14 Higashi-Gotanda, Shinagawa-ku, Tokyo Aro Kasei Co., the company
Claims (1)
り空気を吹込んでパリソンをブロ−成形して中空成形体
となし、該中空成形体に発泡ビ−ズを充填した後、スチ
−ムピンにより加熱水蒸気を吹込んで発泡成形させる皮
つき発泡成形体の成形法において、 前記中空成形体における、ブロ−またはスチ−ムピンに
沿う部位に、蒸気逃がし孔を開口して加熱水蒸気を吹込
むことを特徴とする皮つき発泡成形体の成形法。1. A blow molding die is blown with air in a blow molding die to blow-mold a parison to form a hollow molded body, and the hollow molded body is filled with foam beads, and then a stir is formed. -In a method for molding a foamed molded article with skin, in which heated steam is blown by a mupin to foam-mold, in the hollow molded article, a steam escape hole is opened at a site along the blower or steam pin, and heated steam is blown. A method for forming a foamed molded article with a skin, which is characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5349796A JP2770121B2 (en) | 1993-12-29 | 1993-12-29 | Molding method of foamed molded body with skin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5349796A JP2770121B2 (en) | 1993-12-29 | 1993-12-29 | Molding method of foamed molded body with skin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07195536A true JPH07195536A (en) | 1995-08-01 |
| JP2770121B2 JP2770121B2 (en) | 1998-06-25 |
Family
ID=18406178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5349796A Expired - Lifetime JP2770121B2 (en) | 1993-12-29 | 1993-12-29 | Molding method of foamed molded body with skin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2770121B2 (en) |
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|---|---|---|---|---|
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| CN103203878A (en) * | 2012-01-11 | 2013-07-17 | 株式会社Jsp | Method For Producing Skin-covered Foamed Molded Article And Apparatus For Production Thereof |
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- 1993-12-29 JP JP5349796A patent/JP2770121B2/en not_active Expired - Lifetime
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|---|---|---|---|---|
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| JP4503720B2 (en) * | 1999-01-26 | 2010-07-14 | 株式会社ジェイエスピー | Method for producing foamed article with skin |
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| JP2770121B2 (en) | 1998-06-25 |
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