JP2001047450A - Mold for foam molding - Google Patents
Mold for foam moldingInfo
- Publication number
- JP2001047450A JP2001047450A JP11225800A JP22580099A JP2001047450A JP 2001047450 A JP2001047450 A JP 2001047450A JP 11225800 A JP11225800 A JP 11225800A JP 22580099 A JP22580099 A JP 22580099A JP 2001047450 A JP2001047450 A JP 2001047450A
- Authority
- JP
- Japan
- Prior art keywords
- space
- projecting
- mold
- air
- urethane
- 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
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
- 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
- B29C44/58—Moulds
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、発泡成形型に関
し、更に詳細には、外面に複数の突部を有する発泡成形
品を発泡成形するに際し、キャビティに画成された突出
空間内に閉込められた空気およびガスを型外へ排出して
該発泡成形品の突部に欠肉部が形成されることを防止す
るよう構成した発泡成形型に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foaming mold, and more particularly, to a method of foaming a foamed molded product having a plurality of projections on an outer surface thereof, which is confined in a projecting space defined in a cavity. The present invention relates to a foaming mold configured to discharge formed air and gas to the outside of the mold so as to prevent the underfill portion from being formed at a projection of the foamed molded article.
【０００２】[0002]
【従来の技術】一般的に発泡成形型は、例えば図７に示
すように互いに開閉可能な上型４１と下型４２から構成
され、下型４２に対して上型４１を型締めすることで発
泡成形品の形状を前提としたキャビティ４３が内部に画
成されている。そして、前記発泡成形型３０による発泡
成形品Ｐの成形に際しては、例えばオープン注入法によ
る場合を例にとると、上型４１を開放した下で下型４２
のキャビティ４３内に所定量のウレタン原液を注入して
該上型４１を該下型４２に型締めすると、ウレタン原液
は化学反応により白濁したクリーム状となった後に細か
い気泡が発生して発泡を開始し、所定時間(ライズタイ
ム)後にキャビティ４３に充満するようになる。2. Description of the Related Art In general, a foaming mold comprises an upper mold 41 and a lower mold 42 which can be opened and closed with each other, for example, as shown in FIG. A cavity 43 based on the shape of the foam molded article is defined inside. When molding the foam molded article P by the foam molding die 30, for example, in the case of the open injection method, the lower mold 42 is opened while the upper mold 41 is opened.
When a predetermined amount of urethane stock solution is injected into the cavity 43 and the upper mold 41 is clamped to the lower mold 42, the urethane stock solution becomes opaque creamy by a chemical reaction, and then fine bubbles are generated and foaming occurs. After the start, the cavity 43 is filled after a predetermined time (rise time).
【０００３】ところで図８(ａ)に示した前記発泡成形品
Ｐは、適宜の間隔で隣接して外方へ突出する合計４個の
突部Ｐ1,Ｐ2,Ｐ3,Ｐ4を有した形状を呈しているため、
前記発泡成形型４０では、上型４１の内面に壁体部４１
ａ,４１ｂ,４１ｃを突設することにより、各突部Ｐ1,Ｐ
2,Ｐ3,Ｐ4に対応した突出空間４４,４５,４６,４７がキ
ャビティ４３の上方に画成されている。このため、キャ
ビティ４３に注入したウレタン原液が発泡反応を開始し
てウレタンＵが徐々に上方へ膨張すると、該キャビティ
４３内に残存する空気やウレタン原液の発泡反応による
ガスは、各突出空間４４,４５,４６,４７へ押上げられ
ていく。このとき、図７の両側に位置する第１突出空間
４４および第４突出空間４７は上型４１と下型４２との
接合分割面Ｐ.Ｌに隣接しているため、該突出空間４４,
４７内の空気およびガスは、この接合分割面Ｐ.Ｌに成
形されたガス抜き用の隙間を介して発泡成形型４０の外
部へ適宜排出され得る。しかるに、内側に位置する第２
突出空間４５および第３突出空間４６は前記接合分割面
Ｐ.Ｌに隣接していないため、該突出空間４５,４６内の
空気およびガスは型外へ排出されることなく残留してし
まう。従って実際に成形された発泡成形品Ｐでは、図８
(ｂ)に示すように、前記第２突出空間４５および第３突
出空間４６に対応した前記突部Ｐ2,Ｐ3に欠肉部Ｓが形
成され、これにより製品不良を招来していた。The foam molded product P shown in FIG. 8A has a total of four protrusions P 1 , P 2 , P 3 , and P 4 that are adjacent to each other and protrude outward at appropriate intervals. Because it has a shape that
In the foaming mold 40, the wall 41 is provided on the inner surface of the upper mold 41.
a, 41b, and 41c are provided so as to protrude, so that each protrusion P 1 , P
2, the protruding space 44, 45, 46, 47 corresponding to P 3, P 4 is defined above the cavity 43. For this reason, when the urethane stock solution injected into the cavity 43 starts a foaming reaction and the urethane U gradually expands upward, air remaining in the cavity 43 and gas generated by the foaming reaction of the urethane stock solution flow into the respective projecting spaces 44, It is pushed up to 45, 46, 47. At this time, the first protruding space 44 and the fourth protruding space 47 located on both sides of FIG. 7 are adjacent to the joint dividing plane PL between the upper die 41 and the lower die 42,
The air and gas in 47 can be appropriately discharged to the outside of the foaming mold 40 through a gas venting gap formed in the joint division plane PL. However, the second inside
Since the projecting space 45 and the third projecting space 46 are not adjacent to the joining division plane PL, air and gas in the projecting spaces 45 and 46 remain without being discharged out of the mold. Therefore, in the foam molded article P actually molded, FIG.
As shown in (b), the underfill portions S are formed in the protrusions P 2 and P 3 corresponding to the second protrusion space 45 and the third protrusion space 46, thereby causing a product defect.
【０００４】そこで、前述した問題点を解決するため
に、例えば図９に示すような発泡成形型が提案されて実
施に供されている。この発泡成形型５５では、前記第２
突出空間４５および第２突出空間４６に対応した上型４
１の壁部に、夫々の突出空間４５,４６内と型外とを連
通する直径３ｍｍ程度の空気排出孔５６を形成し、発泡
成形過程において各突出空間４５,４６内の空気および
ガスを型外へ排出することを許容した型式のものであ
る。またこの型式の発泡成形型５５では、前記空気排出
孔５６に対応した型内壁面に、空気およびガスのみを通
過させるスラブ５７を配設するものもある。なお図示し
ないが、前記上型４１の壁部に夫々の突出空間４５,４
６内と型外とを連通する空気放出口を開設すると共に各
空気放出口を閉塞可能な栓部材を設け、発泡成形工程に
おいて該栓部材を空気放出口から脱抜することで対応の
突出空間４５,４６内の空気およびガスを型外へ排出し
得るようにした発泡成形型も実施されている。In order to solve the above-mentioned problems, a foaming mold as shown in FIG. 9 has been proposed and put into practice. In this foaming mold 55, the second
Upper die 4 corresponding to projecting space 45 and second projecting space 46
An air discharge hole 56 having a diameter of about 3 mm is formed in the wall of each of the projecting spaces 45 and 46 to communicate the inside of the projecting spaces 45 and 46 with the outside of the mold. It is a type that allows discharge to the outside. Further, in this type of foam molding die 55, there is a type in which a slab 57 that allows only air and gas to pass is disposed on the inner wall surface of the die corresponding to the air discharge hole 56. Although not shown, respective projecting spaces 45, 4 are formed in the wall of the upper die 41.
6 and a plug member capable of closing each air discharge port is provided, and a corresponding protruding space is removed by removing the plug member from the air discharge port in the foam molding process. Foam molds capable of discharging air and gas in the tubes 45 and 46 to the outside of the mold have been implemented.
【０００５】[0005]
【発明が解決しようとする課題】ところで、図９に例示
した発泡成形型５５では、前記第２突出空間４５および
第３突出空間４６内の空気およびガスを型外へ排出する
ことを許容するので、成形された発泡成形品Ｐの各突部
Ｐ2,Ｐ3に前記欠肉部Ｓが形成される不都合を回避する
ことはできる。しかるに前記発泡成形型５５では、前記
スラブ５７を装備しないタイプにおいては、１回の成形
作業で該空気排出孔５６にウレタンＵが詰まってしまう
ので毎回これを除去する作業を伴い、生産効率が極めて
低い欠点を内在している。また前記スラブ５７を装備し
たタイプでは、空気排出孔５６のウレタン除去作業は不
要となるとしても、成形作業毎に該スラブ５６を装着セ
ットする作業が必要となり、この形態でも成形作業の合
理化や生産効率の向上は図り得なかった。しかも前記発
泡成形型５５では、空気およびガスの排出量をコントロ
ールできないので、空気およびガスの抜け過ぎによる発
泡成形品のＰの底上がりが発生してしまう欠点も内在し
ている。The foaming mold 55 illustrated in FIG. 9 allows the air and gas in the second projecting space 45 and the third projecting space 46 to be discharged outside the mold. , it is possible to avoid a disadvantage that the underfill portion S in the projections P 2, P 3 of the molded foamed molded article P is formed. However, in the case where the foam molding die 55 is not equipped with the slab 57, the urethane U is clogged in the air discharge hole 56 in one molding operation. There are inherent low drawbacks. Further, in the type equipped with the slab 57, even if the urethane removal work of the air discharge hole 56 becomes unnecessary, the work of mounting and setting the slab 56 is required for each molding work. Efficiency could not be improved. Moreover, in the foaming mold 55, since the discharge amount of air and gas cannot be controlled, there is also a disadvantage that the P of the foamed molded product rises due to excessive air and gas escape.
【０００６】[0006]
【発明の目的】本発明は、前述した課題を好適に解決す
るべく提案されたもので、発泡成形途中においてはキャ
ビティの各突出空間内に存在する空気およびガスが接合
分割面側へ通過することを許容すると共に、発泡最終段
階においては各突出空間内に閉込められた空気の収容を
許容する空気流通収容路を設けることで、発泡成形品の
突部に欠肉部が形成されることを防止すると共にメンテ
ナンスの簡素化による生産効率向上を図った発泡成形型
を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned problem suitably. In the course of foam molding, air and gas present in each projecting space of the cavity pass to the joint dividing surface side. In the final stage of foaming, by providing an air flow accommodating passage for accommodating the air confined in each protruding space, it is possible to prevent the underfill portion from being formed in the protrusion of the foam molded product. It is an object of the present invention to provide a foam molding die that prevents production and improves production efficiency by simplifying maintenance.
【０００７】[0007]
【課題を解決するための手段】前記課題を解決し、所期
の目的を達成するために、本発明に係る発泡成形型は、
適宜の間隔で隣接して外方へ突出する少なくとも２つの
突部を有する発泡体を成形するための発泡成形型であっ
て、その開閉自在な上型および下型の内部に画成される
キャビティに前記夫々の突部に対応する突出空間を画成
し、これら突出空間は前記上型および下型の接合分割面
に隣接する突出空間と、該接合分割面に隣接しない突出
空間とに分かたれる発泡成形型において、前記キャビテ
ィに形成されて前記夫々の突出空間を仕切る壁部に、隣
接し合う突出空間を相互に連通する空気流通収容路を開
設し、前記キャビティ中で反応して膨張するウレタンが
前記突出空間へ侵入するに伴なって、これら突出空間に
存在する空気および該ウレタンから発生するガスは、こ
れら空気流通収容路を介して前記接合分割面に隣接する
突出空間へ移動し、最終的にこの接合分割面から型外へ
排出されるよう構成したことを特徴とする。Means for Solving the Problems In order to solve the above problems and achieve the intended object, a foaming mold according to the present invention comprises:
What is claimed is: 1. A foam molding mold for molding a foam having at least two protrusions protruding outwardly adjacent to each other at an appropriate interval, wherein a cavity defined inside an upper mold and a lower mold that can be freely opened and closed. Protruding spaces corresponding to the respective protruding portions, and these protruding spaces are divided into a protruding space adjacent to the upper mold and the lower mold and a protruding space not adjacent to the joining split surface. In the falling foaming mold, an air flow accommodating passage is formed in the cavity formed in the cavity to partition the respective projecting spaces, and communicates with the adjacent projecting spaces, and reacts and expands in the cavity. As the urethane enters the protruding spaces, the air present in the protruding spaces and the gas generated from the urethane move to the protruding spaces adjacent to the joining division surface via the air circulation accommodating passages. Characterized by being configured to be finally discharged into the mold out from the junction dividing surface.
【０００８】[0008]
【発明の実施の形態】次に、本発明に係る発泡成形型に
つき、好適な実施例を挙げて、添付図面を参照しながら
以下説明する。なお本実施例では、前述した図８(ａ)に
例示する形状の発泡成形品、すなわち外面上部に適宜の
間隔で隣接して上方へ突出する合計４個の突部Ｐ1,Ｐ2,
Ｐ3,Ｐ4を有した形状の発泡成形品Ｐを成形する発泡成
形型につき説明する。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a foaming mold according to the present invention. In this embodiment, a foam molded product having the shape illustrated in FIG. 8A described above, that is, a total of four protrusions P 1 , P 2 , which protrude upward adjacent to the upper portion of the outer surface at appropriate intervals.
A foaming mold for molding a foamed molded article P having a shape having P 3 and P 4 will be described.
【０００９】(発泡成形型)図１は、本発明の一実施例に
係る発泡成形型を概略的に示す断面図であって、本実施
例の発泡成形型１０は、互いに開閉自在な上型１１と下
型１２から構成され、前記下型１２の開口部１２ａに対
して前記上型１１を型締めすることで、前記発泡成形品
Ｐの形状を前提としたキャビティ１３が内部に画成され
るようになっている。なお前記発泡成形型１０は、オー
プン注入によりウレタン原液を注入するタイプのもの
で、上型１１を開放した状態で下型１２の前記開口部１
２ａを介して所定量のウレタン原液をキャビティ１３内
に注入するようになっている。また、下型１２と上型１
１とを型締めした際には、該下型１２と上型１１との接
合分割面(パーティングライン)Ｐ.Ｌにガス抜き用の隙
間が画成されるようになっており、キャビティ１３内の
空気およびガスを型外へ排出し得るようになっている。FIG. 1 is a cross-sectional view schematically showing a foaming mold according to an embodiment of the present invention. 11 and a lower mold 12, and by clamping the upper mold 11 to the opening 12 a of the lower mold 12, a cavity 13 based on the shape of the foam molded product P is defined inside. It has become so. The foaming mold 10 is of a type in which a urethane stock solution is injected by open injection, and the opening 1 of the lower die 12 is opened with the upper die 11 opened.
A predetermined amount of the urethane stock solution is injected into the cavity 13 through the portion 2a. Also, the lower mold 12 and the upper mold 1
When the mold 1 is clamped, a gap for degassing is formed in the joint division surface (parting line) PL between the lower mold 12 and the upper mold 11 so that the cavity 13 The inside air and gas can be discharged out of the mold.
【００１０】前記上型１１では、前記発泡成形品Ｐの形
状を前提として、該発泡成形品Ｐの前記各凹部Ｐａ,Ｐ
ｂ,Ｐｃに対応する壁部１８,１９,２０が内面に膨出形
成され、これにより前記発泡成形品Ｐの前記各突部Ｐ1,
Ｐ2,Ｐ3,Ｐ4に対応した突出空間１４,１５,１６,１７
が、キャビティ１３の上方へ画成されている。そして、
この上型１１が前記下型１２に型締めされた状態におい
ては、両側に位置する第１突出空間１４および第４突出
空間１７は上型１１と下型１２との接合分割面Ｐ.Ｌに
隣接していると共に、内側に位置する第２突出空間１５
および第３突出空間１６は該接合分割面Ｐ.Ｌに隣接し
ていない。In the upper mold 11, on the basis of the shape of the foam molded article P, the concave portions Pa, P
b, the walls 18, 19 and 20 corresponding to the Pc is bulged formed on an inner surface, each projection P 1 of this by the molded foam P,
Projecting spaces 14, 15, 16, 17 corresponding to P 2 , P 3 , P 4
Are defined above the cavity 13. And
In a state where the upper mold 11 is clamped to the lower mold 12, the first projecting space 14 and the fourth projecting space 17 located on both sides are formed on the joint dividing plane PL of the upper mold 11 and the lower mold 12. The second projecting space 15 which is adjacent and located inside
And the third projecting space 16 is not adjacent to the joining division plane PL.
【００１１】(空気流通収容路)そして本実施例の発泡成
形型１０では、第１突出空間１４と第２突出空間１５を
仕切る前記第１壁部１８の上方基部に、各突出空間１
４,１５の上方隅角部に開口して両突出空間１４,１５同
士を空間的に連通する第１空気流通収容路２１が形成さ
れている。また、前記第２突出空間１５と第３突出空間
１６とを仕切る前記第２壁部１９の上方基部には、各突
出空間１５,１６の上方隅角部に開口して両突出空間１
５,１６同士を空間的に連通する第２空気流通収容路２
２が形成されている。すなわち第１空気流通収容路２１
は、第１および第２突出空間１４,１５内へ侵入して徐
々に膨張するウレタンＵの上昇方向に対して、空気およ
びガスが最終的に閉込められる上方隅角部に開口してい
る(図３)。一方、第２空気流通収容路２２も、第２およ
び第３突出空間１５,１６内へ侵入して徐々に膨張する
ウレタンＵの上昇方向に対して、空気およびガスが最終
的に閉込められる上方隅角部に開口している(図３)。(Air flow accommodating passage) In the foaming mold 10 of the present embodiment, each projecting space 1 is formed at the upper base of the first wall 18 which partitions the first projecting space 14 and the second projecting space 15.
A first air flow accommodating passage 21 is formed at the upper corner of each of the first and fourth protrusions 15 and 15 to spatially communicate the two projecting spaces 14 and 15 with each other. In addition, the upper base of the second wall portion 19 that separates the second protruding space 15 and the third protruding space 16 has an opening at the upper corner of each protruding space 15, 16 to open the two protruding spaces 1.
The second air circulation accommodating passage 2 which spatially communicates the fifth and the 16th.
2 are formed. That is, the first air circulation accommodation passage 21
Is opened at the upper corner where air and gas are finally confined with respect to the rising direction of the urethane U which intrudes into the first and second projecting spaces 14 and 15 and gradually expands. (Fig. 3). On the other hand, the second air circulation accommodating passage 22 is also provided in the upward direction in which the air and gas are finally confined in the rising direction of the urethane U which enters the second and third projecting spaces 15 and 16 and gradually expands. It is open at the corner (Fig. 3).
【００１２】なお各空気流通収容路２１,２１のサイズ
は、例えば直径２ｍｍ〜８ｍｍ程度とされ、好適には直
径３ｍｍ〜６ｍｍの範囲で設定するのが望ましい。すな
わち、直径２ｍｍ以下の場合はウレタンＵが詰まって閉
塞し易く、また直径８ｍｍ以上の場合はウレタンＵが容
易に侵入して発泡成形品Ｐの製品面に突出部が形成され
る問題が生ずる。なお、第１空気流通収容路２１および
第２空気流通収容路２２は、各突出空間１５,１６内に
最終的に閉込められる空気およびガスの合計体積を前提
としたもとで、この体積と同程度の容積となるようその
形成数を設定するのが望ましいが、該空気およびガスは
適宜圧縮されて体積が小さくなるので合計体積の３０％
の容積以上であればよい。The size of each of the air flow accommodating passages 21, 21 is, for example, about 2 mm to 8 mm in diameter, and is preferably set in the range of 3 mm to 6 mm in diameter. That is, when the diameter is 2 mm or less, the urethane U is easily clogged and clogged, and when the diameter is 8 mm or more, the urethane U easily penetrates and a problem that a protruding portion is formed on the product surface of the foam molded article P occurs. In addition, the first air circulation accommodating passage 21 and the second air circulation accommodating passage 22 are based on the total volume of air and gas finally confined in each of the protruding spaces 15, 16. It is desirable to set the number of formation so as to have the same volume. However, since the air and gas are appropriately compressed to reduce the volume, 30% of the total volume is reduced.
Or more.
【００１３】このように本実施例の発泡成形型１０で
は、前記第２突出空間１５が、前記第１空気流通収容路
２１および第１突出空間１４を介して上型１１および下
型１２の接合分割面Ｐ.Ｌに空間的に連通しており、該
第２突出空間１５内の空気およびガスは、これら第１空
気流通収容路２１および第１突出空間１４を介して接合
部Ｐ.Ｌから型外へ適宜排出可能となっている(図２)。
また、前記第１突出空間１４および第２突出空間１５の
上面にウレタンＵの上面が到達した時点においては、両
突出空間１４,１５内に閉込められた空気およびガス
は、その一部が第１空気流通収容路２１へ収容され得る
ようになっている(図３)。As described above, in the foaming mold 10 of the present embodiment, the second projecting space 15 is joined to the upper mold 11 and the lower mold 12 through the first air flow accommodating passage 21 and the first projecting space 14. The air and the gas in the second protruding space 15 are spatially communicated with the dividing surface PL, and the air and the gas in the second protruding space 15 pass through the first air flow accommodating passage 21 and the first protruding space 14 from the joint PL. It can be discharged out of the mold as needed (Fig. 2).
At the time when the upper surface of the urethane U reaches the upper surfaces of the first projecting space 14 and the second projecting space 15, some of the air and gas confined in the projecting spaces 14, 15 are partially It can be accommodated in one air circulation accommodation passage 21 (FIG. 3).
【００１４】一方、前記第３突出空間１６は、前記第２
空気流通収容路２２,前記第２突出空間１５,前記第１空
気流通収容路２１および第１突出空間１４を介して上型
１１および下型１２の接合分割面Ｐ.Ｌに空間的に連通
しており、該第３突出空間１６内の空気およびガスは、
これら第２空気流通収容路２２,前記第２突出空間１５,
前記第１空気流通収容路２１および第１突出空間１４を
介して接合分割面Ｐ.Ｌから型外へ排出可能となってい
る(図２)。また、前記第１〜第３突出空間１４,１５,１
６の上面にウレタンＵの上面が到達した時点において、
該第２突出空間１５および第３突出空間１６内に閉込め
られた空気およびガスは、その一部が第２空気流通収容
路２２へ収容され得るようになっている(図３)。On the other hand, the third projecting space 16 is
Via the air flow accommodating passage 22, the second protruding space 15, the first air flow accommodating passage 21, and the first protruding space 14, the air is spatially communicated with the joining division plane PL of the upper mold 11 and the lower mold 12. The air and gas in the third projecting space 16 are
These second air circulation accommodating passages 22, the second projecting spaces 15,
Through the first air flow accommodating passage 21 and the first protruding space 14, it is possible to discharge from the joining division plane PL to the outside of the mold (FIG. 2). Further, the first to third projecting spaces 14, 15, 1
When the upper surface of urethane U reaches the upper surface of 6,
Part of the air and gas confined in the second protruding space 15 and the third protruding space 16 can be accommodated in the second air circulation accommodating passage 22 (FIG. 3).
【００１５】[0015]
【実施例の作用】前述のように構成された本実施例の発
泡成形型１０では、上型１１を開放した下で、図示しな
い注入装置により下型１２のキャビティ１３内へ所定量
のウレタン原液を注入する。そして、ウレタン原液の注
入完了後に前記上型１１を下型１２に型締めすると、ウ
レタン原液は化学反応により白濁したクリーム状となっ
た後に細かい気泡が発生して発泡を開始し、キャビティ
１３に徐々に充満していく(図１)。この際に、キャビテ
ィ１３内に残存する空気およびウレタン原液の発泡反応
により発生したガスは、ウレタンＵの膨張と共に上方へ
徐々に押上げられ、下型１２および上型１１の接合分割
面Ｐ.Ｌに画成された隙間を介して型外へ適宜排出され
る。In the foaming mold 10 of the present embodiment constructed as described above, with the upper mold 11 opened, a predetermined amount of the urethane undiluted solution is introduced into the cavity 13 of the lower mold 12 by an injection device (not shown). Inject. When the upper mold 11 is clamped to the lower mold 12 after the completion of the injection of the urethane stock solution, the urethane stock solution becomes cloudy cream-like due to a chemical reaction, and then fine bubbles are generated and foaming starts, and the foam 13 gradually enters the cavity 13. (Fig. 1). At this time, the gas generated by the foaming reaction of the air remaining in the cavity 13 and the urethane undiluted solution is gradually pushed upward along with the expansion of the urethane U, and the joining division plane PL of the lower mold 12 and the upper mold 11 is joined. Is appropriately discharged out of the mold through the gap defined in FIG.
【００１６】そして、発泡により膨張するウレタンＵの
上面が、前記第１壁部１８,第２壁部１９および第３壁
部２０の下面に到達すると、図２に示すように、前記各
突出空間１４,１５,１６,１７は夫々が独立した空間と
して区分される。ここで前述したように、図１の両側に
位置する第１突出空間１４および第４突出空間１７は、
上型１１と下型１２の接合分割面Ｐ.Ｌに隣接している
ので、当該の突出空間１４,１７内を上昇するウレタン
Ｕにより押上げられる空気およびガスは、該接合分割面
Ｐ.Ｌを介して型外へ適宜排出される。一方、図１の内
側に位置する第２突出空間１５および第３突出空間１６
に関しては、前述したように、何れの突出空間１５,１
６も前記第１空気流通収容路２１および第２空気流通収
容路２２を介して前記接合分割面Ｐ.Ｌに空間的に連通
している。従って、第２突出空間１５内に侵入して上昇
するウレタンＵにより押上げられる該空間１５内の空気
およびガスは、第１空気流通収容路２１および前記第１
突出空間１４を通って前記接合分割面Ｐ.Ｌから型外へ
排出されるので、第２突出空間１５内へのウレタンＵの
膨張を好適に許容する。一方、前記第３突出空間１６内
に侵入して上昇するウレタンＵにより押上げられる該空
間１６内の空気およびガスは、第２空気流通収容路２
２,第２突出空間１５,第１空気流通収容路２１および第
１突出空間１４を通って前記接合分割面Ｐ.Ｌから型外
へ排出されるので、第３突出空間１６内へのウレタンＵ
の膨張を好適に許容する。When the upper surface of the urethane U expanded by foaming reaches the lower surfaces of the first wall portion 18, the second wall portion 19, and the third wall portion 20, as shown in FIG. 14, 15, 16 and 17 are each divided as an independent space. As described above, the first projecting space 14 and the fourth projecting space 17 located on both sides of FIG.
Since it is adjacent to the joining division plane PL of the upper mold 11 and the lower mold 12, the air and gas pushed up by the urethane U rising in the projecting spaces 14, 17 are not connected to the joining division plane PL. Is discharged out of the mold as needed. On the other hand, the second projecting space 15 and the third projecting space 16 located inside FIG.
As described above, regarding any of the protruding spaces 15, 1
6 also spatially communicates with the joining division plane PL via the first air circulation accommodating passage 21 and the second air circulation accommodating passage 22. Therefore, the air and gas in the space 15 that is pushed up by the urethane U that intrudes into the second projecting space 15 and rises is
Since the urethane U is discharged from the joining division plane PL to the outside of the mold through the protruding space 14, the expansion of the urethane U into the second protruding space 15 is suitably permitted. On the other hand, the air and gas in the space 16 that is pushed up by the urethane U that intrudes into the third projecting space 16 and rises is
2. The urethane U is discharged from the joining division plane PL out of the mold through the second projecting space 15, the first air circulation accommodating passage 21, and the first projecting space 14, so that the urethane U enters the third projecting space 16.
Expansion is suitably tolerated.
【００１７】このように、第１〜第４の各突出空間１
４,１５,１６,１７に侵入したウレタンＵが、夫々の突
出空間１４,１５,１６,１７内を発泡しながら上昇して
いる過程では、各突出空間１４,１５,１６,１７内に残
存した空気およびガスは、前記接合分割面Ｐ.Ｌを介し
て発泡成形型１０の外部へ順次排出される。従ってウレ
タンＵは、第２突出空間１５および第３突出空間１６内
へも好適に膨張するようになる。As described above, each of the first to fourth projecting spaces 1
In the process in which the urethane U that has entered the 4, 15, 16, 17 is rising while foaming in the respective projecting spaces 14, 15, 16, 17, it remains in the respective projecting spaces 14, 15, 16, 17 The generated air and gas are sequentially discharged to the outside of the foaming mold 10 through the joining division plane PL. Therefore, the urethane U can be suitably expanded into the second projecting space 15 and the third projecting space 16.
【００１８】そして、前記第１突出空間１４内を上昇し
たウレタンＵの上面中央部が当該突出空間１４の上面に
到達すると、図３(ａ)に示すように、第２突出空間１５
と接合分割面Ｐ.Ｌとの空間的な連通が遮断され、また
第２突出空間１５内を上昇したウレタンＵの上面中央部
が当該突出空間１５の上面に到達すると、第１突出空間
１４(接合分割面Ｐ.Ｌ)と第３突出空間１６との空間的
な連通が遮断される。従って、この時点で第１突出空間
１４の上部隅角部に閉込められた空気およびガスにおい
て、接合分割面Ｐ.Ｌに連通しない上部隅角部に閉込め
られた空気およびガスは、該空間１４内で更に膨張する
ウレタンＵの発泡圧によって、前記第１空気流通収容路
２１内へ押込まれて収容されるに至る。また、前記第２
突出空間１５の上部隅角部に閉込められた空気およびガ
スは、該空間１５内で更に膨張するウレタンＵの発泡圧
によって、その一部は前記第１空気流通収容路２１内へ
押込まれて収容される一方、残りは前記第２空気流通収
容路２２内へ押込まれて収容されるに至る(図３(ｂ))。
更に、前記第３突出空間１６の上部隅角部に閉込められ
た空気およびガスは、該空間１６内で更に膨張するウレ
タンＵの発泡圧によって、その全てが前記第２空気流通
収容路２２内へ押込まれて収容されるに至る(図３
(ｂ))。なお図示しないが、前記第４突出空間１７内の
空気およびガスは、その全てが前記接合分割面Ｐ.Ｌを
介して型外へ排出される。When the central portion of the upper surface of the urethane U which has risen in the first projecting space 14 reaches the upper surface of the projecting space 14, as shown in FIG.
When the spatial communication between the first partitioning space P.L and the urethane U rising in the second protruding space 15 reaches the upper surface of the protruding space 15, the first protruding space 14 ( Spatial communication between the joint division plane PL and the third protruding space 16 is cut off. Therefore, among the air and gas confined in the upper corner of the first protruding space 14 at this time, the air and gas confined in the upper corner not communicating with the joining division plane P.L. Due to the foaming pressure of the urethane U which further expands in the space 14, the urethane U is pushed into the first air flow accommodating passage 21 to be accommodated. In addition, the second
A part of the air and gas trapped in the upper corner of the protruding space 15 is pushed into the first air flow accommodating passage 21 by the foaming pressure of the urethane U which further expands in the space 15. While being accommodated, the rest is pushed into the second air flow accommodating passage 22 to be accommodated (FIG. 3B).
Further, all of the air and gas trapped in the upper corner of the third projecting space 16 are in the second air flow accommodating passage 22 due to the foaming pressure of the urethane U which further expands in the space 16. To be housed (Fig. 3
(b)). Although not shown, all of the air and gas in the fourth protruding space 17 are discharged out of the mold via the joining division plane PL.
【００１９】従って本実施例の発泡成形型１０では、第
２突出空間１５および第３突出空間１６内の上部隅角部
に最終的に閉込められた空気およびガスは、ウレタンＵ
の膨張する際の発泡圧により、これら突出空間１５,１
６の上部隅角部に開口した第１空気流通収容路２１また
は第２空気流通収容路２２内へ押込まれて収容されるよ
うになり、図４に示すように、当該突出空間１５,１６
内全体にウレタンＵが好適に充満するようになる。しか
も、前記第１空気流通収容路２１および第２空気流通収
容路２２は、夫々の空気流通収容路２１,２２に隣接す
る突出空間１４,１５,１６に閉込められる空気とガスの
合計体積を前提とした容積に設定されているので、第２
突出空間１５および第３突出空間１６内に空気が残留す
ることはない。また、各突出空間１４,１５,１６内に充
満したウレタンＵの圧力が同じであるから、第１空気流
通収容路２１および第２空気流通収容路２２内の空気お
よびガスは両側開口部から均一的に押圧されてバランス
が維持されることにより、空気流通収容路２１,２２へ
ウレタンＵが侵入することやこれにより空気が突出空間
内へ押出される等の不都合が発生することがなく、従っ
て発泡成形品Ｐの製品表面に凹部や突部が形成されな
い。Therefore, in the foaming mold 10 of this embodiment, the air and gas finally confined in the upper corners in the second projecting space 15 and the third projecting space 16 are filled with urethane U.
Due to the foaming pressure at the time of expansion, these projecting spaces 15, 1
6 is pushed into the first air circulation accommodating passage 21 or the second air circulation accommodating passage 22 which is opened at the upper corner portion, and as shown in FIG.
Urethane U is suitably filled in the whole. Moreover, the first air circulation accommodating passage 21 and the second air circulation accommodating passage 22 define the total volume of air and gas confined in the projecting spaces 14, 15, 16 adjacent to the respective air circulation accommodating passages 21, 22. Since the volume is assumed to be
No air remains in the protruding space 15 and the third protruding space 16. Further, since the pressure of the urethane U filled in each of the protruding spaces 14, 15, 16 is the same, the air and gas in the first air circulation accommodating passage 21 and the second air circulation accommodating passage 22 are uniform from both side openings. The urethane U does not enter the air flow accommodating passages 21 and 22 and the inconvenience such as the air being pushed out into the projecting space does not occur because the balance is maintained by being pressed, and accordingly, No recesses or protrusions are formed on the product surface of the foam molded product P.
【００２０】そして、ライズタイムを経過した後、更に
適時間が経過したら、所要の方法によりガス抜きを施
し、このガス抜きが完了したらウレタンが硬化するまで
待機する。そして、所要時間が経過して発泡成形品Ｐが
所要形状で完全に硬化したら、上型１１を開放してキャ
ビティ１３から該発泡成形品Ｐを脱型する。After the rise time elapses, when the appropriate time elapses, degassing is performed by a required method, and when the degassing is completed, the process waits until the urethane hardens. Then, when the required time has elapsed and the foam molded product P is completely cured in the required shape, the upper mold 11 is opened and the foam molded product P is released from the cavity 13.
【００２１】このように本実施例の発泡成形型１０で
は、接合分割面Ｐ.Ｌに隣接しない第２突出空間１５お
よび第３突出空間１６内に閉込められた空気およびガス
の排出を好適に行ない得るので、発泡成形品Ｐの突部Ｐ
2,Ｐ3に欠肉部が形成される不都合が好適に回避し得
る。また、第１空気流通収容路２１および第２空気流通
収容路２２内は、残存空気およびガスが押込まれて圧力
が適宜上昇した状態となるので、これら空気流通収容路
２１,２１内にウレタンＵが侵入することも殆どなく、
該空気流通収容路２１,２１を成形作業毎に清掃する必
要もなく生産効率を向上させ得る。また、キャビティ１
３内は略最適な圧力に保持されるので、空気およびガス
の過度の排出により発生する発泡成形品Ｐの底上がり不
良も好適に回避し得る。As described above, in the foaming mold 10 of the present embodiment, the discharge of the air and gas trapped in the second projecting space 15 and the third projecting space 16 which are not adjacent to the joining division plane PL is preferably performed. Since it can be performed, the protrusion P of the foam molded product P
Inconvenience of formation of underfill in P 2 and P 3 can be suitably avoided. Further, since the remaining air and gas are pushed into the first air circulation accommodating passage 21 and the second air circulation accommodating passage 22 and the pressure is appropriately increased, urethane U is introduced into the air circulation accommodating passages 21 and 21. Hardly invades,
The production efficiency can be improved without having to clean the air flow accommodating passages 21, 21 every molding operation. Also, cavity 1
Since the pressure in the inside 3 is maintained at a substantially optimum pressure, it is possible to suitably avoid a rise in the bottom of the foam molded product P caused by excessive discharge of air and gas.
【００２２】図５は、キャビティ１３の中央に立設した
テーパ部２６ａを有する壁部２６によってアンダーカッ
ト形状を呈する発泡成形型２５を例示したものである
が、この発泡成形型２５においても、該壁部２６の屈曲
部に空気の流通を許容する空気流通収容路２８を開設す
ることにより該屈曲部内側に閉込められた空気およびガ
スを好適に排出することが可能となり、発泡成形品に欠
肉部が形成される不都合が好適に回避できる。すなわ
ち、前記壁部２６を挟んだキャビティ２７の左右両側に
注入されたウレタン原液が夫々発泡反応を開始し、左側
のウレタンＵが壁部２６の屈曲部まで上昇すると、図６
(ａ)に示すように、この屈曲部の内側隅角部に空気およ
びガスが閉込められてしまう。しかし、ウレタンＵの膨
張圧力により閉込められた空気およびガスは、前記空気
流通収容路２８を介して壁部２６の右側へ順次流出し、
最終的に全ての空気およびガスは右側空間へ放出された
後、上型２９と下型３０の接合分割面Ｐ.Ｌから型外へ
排出される。しかも、この空気およびガスが完全に放出
される直前においては、図６(ｂ)に示すように、膨張し
た右側のウレタンＵが該空気流通収容路２８を閉塞する
ので、この空気流通収容路２８には適宜量の空気が閉込
められるようになり、左右のウレタンＵ,Ｕが該空気流
通収容路２８内へ侵入することがない。FIG. 5 shows an example of a foaming mold 25 having an undercut shape formed by a wall 26 having a tapered portion 26a erected at the center of the cavity 13. In this foaming mold 25 also, By providing an air flow accommodating passage 28 that allows air to flow through the bent portion of the wall portion 26, air and gas trapped inside the bent portion can be appropriately discharged, and the foam molded product lacks. The inconvenience of formation of the meat portion can be suitably avoided. That is, when the urethane stock solution injected into the left and right sides of the cavity 27 sandwiching the wall portion 26 starts a foaming reaction, and the urethane U on the left rises to the bent portion of the wall portion 26, FIG.
As shown in (a), air and gas are trapped in the inner corner of the bent portion. However, the air and gas confined by the expansion pressure of the urethane U sequentially flow out to the right side of the wall 26 via the air circulation accommodating passage 28,
Eventually, all air and gas are discharged to the right space, and then discharged out of the mold from the joint division plane PL of the upper mold 29 and the lower mold 30. In addition, immediately before the air and gas are completely released, as shown in FIG. 6B, the expanded right urethane U closes the air flow accommodating passage 28, so that the air flow accommodating passage 28 is closed. , An appropriate amount of air is confined, and the left and right urethanes U, U do not enter the air circulation accommodating passage 28.
【００２３】なお前記実施例では、外面上部に適宜の間
隔で隣接して上方へ突出する合計４個の突部Ｐ1,Ｐ2,Ｐ
3,Ｐ4を有した形状の発泡成形品Ｐを成形する発泡成形
型１０につき説明した。しかし、例えば外面上部に適宜
の間隔で隣接して上方へ突出する合計ｎ個の突部Ｐ1〜
Ｐnを有する発泡成形品を成形するに際しては、この発
泡成形品を成形する発泡成形型のキャビティは、ｎ個の
各突部Ｐ1〜Ｐnに対応するｎ個の突出空間が画成される
と共に、各突出空間を仕切るｎ個の壁部が突出形成され
る。このような発泡成形金型では、各突出空間を仕切る
ｎ個の各壁部に、隣接し合う突出空間を相互に連通する
空気流通収容路を開設すれば、各突出空間に存在する空
気およびガスは、これら空気流通収容路を介して接合分
割面に隣接する突出空間へ移動し、最終的にこの接合分
割面から型外へ排出される。また、各突出空間に最終的
に閉込められた空気は、ウレタンの発泡圧によって夫々
の突出空間に隣接する前記空気流通収容路内へ収容され
るので、これに伴って各突出空間内へウレタンが充満す
ることも許容されるようになり、発泡成形品におけるｎ
個の各突部Ｐ1〜Ｐnに欠肉部が形成されることがない。In the above embodiment, a total of four protrusions P 1 , P 2 , P adjacent to the upper part of the outer surface and projecting upward at appropriate intervals are provided.
3 was explained foaming mold 10 for molding the molded foam P shape having a P 4. However, for example, a total of n protrusions P 1 to P that protrude upward adjacent to the upper part of the outer surface at appropriate intervals.
When molding a foam molded product having P n , the cavity of the foam mold for molding the foam molded product has n projecting spaces corresponding to the n projecting portions P 1 to P n. In addition, n walls partitioning each protruding space are formed to protrude. In such a foaming mold, air and gas existing in each protruding space can be provided by opening an air flow accommodating passage communicating each adjacent protruding space in each of n walls partitioning each protruding space. Moves to the protruding space adjacent to the joint division surface via these air flow accommodating passages, and is finally discharged out of the mold from the joint division surface. Further, the air finally confined in each protruding space is accommodated in the air circulation accommodating passage adjacent to each protruding space by the foaming pressure of urethane, and accordingly, urethane is introduced into each protruding space. Is also allowed, and n in the foam molded article
Never underfill portions are formed in the projections P 1 to P n of the pieces.
【００２４】[0024]
【発明の効果】以上説明した如く、本発明に係る発泡成
形型によれば、上型と下型の接合分割面に隣接しない突
出空間と該接合分割面とを空気流通収容路で空間的に連
通した構造としたことにより、前記突出空間内に閉込め
られた空気およびガスをこの空気流通収容路を介して接
合分割面から排出し得るようになり、発泡成形品の突部
に欠肉部が形成される不都合を好適に回避し得る利点が
ある。そして空気流通収容路は、前記突出空間に最終的
に空気およびガスが閉込められる部位に開口しているの
で、前記空気流通収容路と該突出空間と連通が遮断され
たとしても、該突出空間内に閉込められた空気およびガ
スはウレタンの発泡圧を利用して該空気流通収容路内へ
収容され、当該の突出空間内にウレタンが充満すること
が好適に許容される。しかも前記空気流通収容路は、最
終的に閉込められる空気およびガスの合計体積を前提と
して容積が設定されているので、突出空間内に空気が残
ったり空気流通収容路内にウレタンが侵入する等の不都
合を好適に回避でき、これにより空気流通収容路内のウ
レタン除去作業を毎回実施する必要もない。更に、キャ
ビティ内の圧力が最適となるので、空気およびガスの抜
け過ぎによる発泡成形品の底上がり不良の発生も好適に
防止できる。As described above, according to the foaming mold according to the present invention, the projecting space which is not adjacent to the joint division surface of the upper mold and the lower mold and the joint division surface are spatially separated by the air flow accommodating passage. Due to the communication structure, air and gas confined in the protruding space can be discharged from the joint division surface through the air flow accommodating passage, and a notched portion is formed in the protrusion of the foam molded product. There is an advantage that the inconvenience that is formed can be preferably avoided. Further, since the air circulation accommodating passage is opened at a portion where the air and gas are finally confined in the protruding space, even if the communication between the air circulation accommodating passage and the protruding space is cut off, the air circulation accommodating passage is closed. The air and gas confined in the inside are accommodated in the air circulation accommodating passage utilizing the foaming pressure of urethane, and it is suitably allowed that the protruding space is filled with urethane. Moreover, since the volume of the air circulation accommodating passage is set on the premise of the total volume of air and gas to be finally confined, air remains in the projecting space or urethane enters the air circulation accommodating passage. Can be suitably avoided, so that it is not necessary to carry out the urethane removal operation in the air circulation accommodating passage every time. Further, since the pressure in the cavity is optimized, it is possible to suitably prevent the bottom of the foam molded product from rising due to excessive escape of air and gas.
【図１】本発明の一実施例に係る発泡成形型を、キャビ
ティ中のウレタンが発泡反応により膨張しつつある状態
を示す断面図である。FIG. 1 is a cross-sectional view showing a state in which urethane in a cavity is expanding by a foaming reaction in a foaming mold according to one embodiment of the present invention.
【図２】キャビティ内の各突出空間内に残存する空気お
よび発泡反応によるガスが、ウレタンの膨張により発泡
成形型の接合分割面を介して型外へ排出される状態を示
す要部拡大断面図である。FIG. 2 is an enlarged sectional view of a main part showing a state in which air remaining in each protruding space in a cavity and a gas due to a foaming reaction are discharged outside the mold through a joining division surface of a foaming mold due to expansion of urethane. It is.
【図３】(ａ)は、ウレタンが各突出空間の上面まで膨張
した際に、夫々の突出空間内に閉込められた空気および
ガスが空気流通収容路内へ押込まれる状態を示す要部断
面図、(ｂ)は(ａ)の一部拡大断面図である。FIG. 3 (a) is a main part showing a state where air and gas confined in each projecting space are pushed into the air circulation accommodating passage when urethane expands to the upper surface of each projecting space. FIG. 2B is a cross-sectional view of FIG.
【図４】夫々の突出空間内に残存した空気およびガスが
空気流通収容路内へ収容される結果として、各突出空間
内にウレタンが完全に充満した状態を示す要部断面図で
ある。FIG. 4 is a fragmentary cross-sectional view showing a state in which urethane is completely filled in each projecting space as a result of air and gas remaining in each projecting space being accommodated in an air circulation accommodating passage.
【図５】本発明の別形態に係る発泡成形型の断面図であ
る。FIG. 5 is a sectional view of a foaming mold according to another embodiment of the present invention.
【図６】図５に示す発泡成形型のキャビティ内でウレタ
ンが膨張している状態を示す要部断面図であって、(ａ)
は壁部左側に閉込められた空気およびガスが空気流通収
容路を介して壁部右側へ放出される状態を示し、(ｂ)は
壁部左側に閉込められた空気およびガスの放出完了に伴
い空気流通収容路が閉塞される状態を示している。FIG. 6 is a sectional view showing a state where urethane is expanded in a cavity of the foaming mold shown in FIG. 5;
Shows a state in which air and gas confined on the left side of the wall are discharged to the right side of the wall via the air flow accommodating passage, and (b) shows a state where the release of air and gas confined on the left side of the wall is completed. Accordingly, a state in which the air circulation accommodating passage is closed is shown.
【図７】従前の発泡成形型の一例を、キャビティ中でウ
レタンが膨張しつつある状態で示す断面図である。FIG. 7 is a cross-sectional view showing an example of a conventional foaming mold in a state where urethane is expanding in a cavity.
【図８】(ａ)は、図１に示した発泡成形型により好適に
成形される発泡成形品の断面図、(ｂ)は図７に示した従
来技術に係る発泡成形型により成形される発泡成形品の
断面図である。8 (a) is a cross-sectional view of a foam molded product suitably molded by the foam molding die shown in FIG. 1, and FIG. 8 (b) is molded by the conventional foam molding die shown in FIG. It is sectional drawing of a foam molding.
【図９】図７に示した発泡成形型の問題点を解決するた
め提案された従来の別の発泡成形型の断面図である。9 is a cross-sectional view of another conventional foaming mold proposed to solve the problem of the foaming mold shown in FIG.
１１ 上型 １２ 下型 １３ キャビティ １４ 第１突出空間 １５ 第２突出空間 １６ 第３突出空間 １８ 第１壁部(壁部) １９ 第２壁部(壁部) ２１ 第１空気流通収容路 ２２ 第２空気流通収容路 Ｐ 発泡成形品 Ｐ1 突部 Ｐ2 突部 Ｐ3 突部 Ｐn 突部 Ｐ.Ｌ 接合分割面 Ｕ ウレタンDESCRIPTION OF SYMBOLS 11 Upper mold 12 Lower mold 13 Cavity 14 1st projection space 15 2nd projection space 16 3rd projection space 18 1st wall part (wall part) 19 2nd wall part (wall part) 21 1st air circulation accommodation passage 22nd 2 air flow housing passage P foamed molded article P 1 projection P 2 projections P 3 projections P n protrusion P.L junction dividing plane U urethane
───────────────────────────────────────────────────── フロントページの続き (72)発明者 金森 秀司 愛知県安城市今池町３丁目１番36号 株式 会社イノアックコーポレーション安城事業 所内 (72)発明者 林 悟 愛知県安城市今池町３丁目１番36号 株式 会社イノアックコーポレーション安城事業 所内 Ｆターム(参考） 4F202 AA42 AG05 AG20 CA01 CB01 CP01 CP04 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shuji Kanamori 3-1-136 Imaikecho, Anjo-shi, Aichi Pref. No. 36 Inoac Corporation Anjo Office F-term (reference) 4F202 AA42 AG05 AG20 CA01 CB01 CP01 CP04
Claims (6)
なくとも２つの突部(P1,P2,P3,Pn)を有する発泡体(P)を
成形するための発泡成形型であって、その開閉自在な上
型(11)および下型(12)の内部に画成されるキャビティ(1
3)に前記夫々の突部(P1,P2,P3,Pn)に対応する突出空間
(14,15,16,n)を画成し、これら突出空間(14,15,16,n)は
前記上型(11)および下型(12)の接合分割面(P.L)に隣接
する突出空間(14)と、該接合分割面(P.L)に隣接しない
突出空間(15,16,n)とに分かたれる発泡成形型におい
て、 前記キャビティ(13)に形成されて前記夫々の突出空間(1
4,15,16,n)を仕切る壁部(18,19,n)に、隣接し合う突出
空間(14,15,16,n)を相互に連通する空気流通収容路(21,
22,n)を開設し、 前記キャビティ(13)中で反応して膨張するウレタン(U)
が前記突出空間(14,15,16,n)へ侵入するに伴なって、こ
れら突出空間(14,15,16,n)に存在する空気および該ウレ
タン(U)から発生するガスは、これら空気流通収容路(2
1,22,n)を介して前記接合分割面(P.L)に隣接する突出空
間(14)へ移動し、最終的にこの接合分割面(P.L)から型
外へ排出されるよう構成したことを特徴とする発泡成形
型。1. A foam mold for molding a foam (P) having at least two protrusions (P 1 , P 2 , P 3 , P n ) adjacent and projecting outward at appropriate intervals. A cavity (1) defined inside the upper mold (11) and the lower mold (12) that can be freely opened and closed.
3) a projection space corresponding to each of the projections (P 1 , P 2 , P 3 , P n )
(14,15,16, n), and these projecting spaces (14,15,16, n) protrude from the upper mold (11) and the lower mold (12). In a foaming mold divided into a space (14) and a projecting space (15, 16, n) not adjacent to the joining division plane (PL), the foaming mold is formed in the cavity (13), and the respective projecting spaces are formed. (1
4,15,16, n), the air flow accommodating path (21,19), which connects the adjacent projecting spaces (14,15,16, n) to the wall (18,19, n).
22, n), urethane (U) reacting and expanding in the cavity (13)
As the gas enters the projecting spaces (14, 15, 16, n), the air existing in the projecting spaces (14, 15, 16, n) and the gas generated from the urethane (U) Air circulation accommodating path (2
(1,22, n) to move to the projecting space (14) adjacent to the joining division plane (PL), and finally discharge from the joining division plane (PL) to the outside of the mold. Characteristic foam mold.
接する第１突出空間(14)と、該接合分割面(P.L)に隣接
しない第２突出空間(15)とに分かたれ、前記キャビティ
(13)に形成されて第１突出空間(14)および第２突出空間
(15)を仕切る壁部(18)に、両突出空間(14,15)を連通す
る空気流通収容路(21)が開設され、前記突出空間(14,1
5)に存在する空気および前記ウレタン(U)から発生する
ガスは、前記空気流通収容路(21)を介して前記接合分割
面(P.L)に隣接する突出空間(14)へ移動して、この接合
分割面(P.L)から型外へ排出される請求項１記載の発泡
成形型。2. The protruding portion is divided into a first protruding space (14) adjacent to the joint dividing plane (PL) and a second protruding space (15) not adjacent to the joining dividing plane (PL). , The cavity
(13) formed in the first projecting space (14) and the second projecting space
An air flow accommodating passageway (21) communicating the two projecting spaces (14, 15) is opened in the wall (18) partitioning the (15), and the projecting space (14, 1) is opened.
The air generated in 5) and the gas generated from the urethane (U) move to the projecting space (14) adjacent to the joining division surface (PL) through the air flow accommodating passage (21), and The foaming mold according to claim 1, wherein the foaming mold is discharged from the joining division surface (PL) outside the mold.
接する第１突出空間(14)と、該接合分割面(P.L)に隣接
しない第２突出空間(15)および第３突出空間(16)とに分
かたれ、前記キャビティ(13)に形成されて第１突出空間
(14),第２突出空間(15)および第３突出空間(16)を夫々
仕切る壁部(18,19)に、これら３つの突出空間(14,15,1
6)を連通する空気流通収容路(21,22)が開設され、前記
突出空間(14,15,16)に存在する空気および前記ウレタン
(U)から発生するガスは、前記空気流通収容路(21,22)を
介して前記接合分割面(P.L)に隣接する突出空間(14)へ
移動して、この接合分割面(P.L)から型外へ排出される
請求項１記載の発泡成形型。3. The projecting portion has a first projecting space (14) adjacent to the joining split surface (PL), a second projecting space (15) not adjacent to the joining split surface (PL), and a third projecting space. And a first protruding space formed in the cavity (13).
(14), the second protruding space (15) and the third protruding space (16) are partitioned by walls (18, 19), respectively, into these three protruding spaces (14, 15, 1).
6), an air circulation accommodating passage (21, 22) communicating with the urethane and the urethane existing in the projecting space (14, 15, 16) is opened.
The gas generated from (U) moves to the protruding space (14) adjacent to the joining division surface (PL) via the air circulation accommodating path (21, 22), and from this joining division surface (PL). The foaming mold according to claim 1, which is discharged outside the mold.
タン(U)が接合分割面(P.L)と空気流通収容路(21)との連
通を遮断した後に、前記突出空間(15,16,n)内に閉込め
られた空気およびガスを前記空気流通収容路(21,22,n)
内へ収容させることで、突出空間(15,16,n)内に該ウレ
タン(U)が充満することを許容する請求項１記載の発泡
成形型。4. After the urethane (U) expanded into the protruding space (14) cuts off the communication between the joining division surface (PL) and the air flow accommodating passage (21), the urethane (U) reverts to the protruding space (15, 16). , n), the air and gas confined in the air circulation accommodating passage (21, 22, n).
The foaming mold according to claim 1, wherein the urethane (U) is allowed to be filled in the protruding space (15, 16, n) by being accommodated therein.
ウレタン(U)が前記第突出空間(15,16,n)内へ膨張した際
に前記空気およびガスが最終的に閉込められる部位で隣
接する該突出空間(15,16,n)へ開口した請求項１または
４に記載の発泡成形型。5. The air flow accommodating path (21, 22, n) allows the air and gas to finally flow when the urethane (U) expands into the first projecting space (15, 16, n). The foaming mold according to claim 1 or 4, wherein the foaming mold is opened to the adjacent protruding space (15, 16, n) at a portion to be confined.
に連通する突出空間(15,16,n)内に最終的に閉込められ
る空気およびガスの合計体積を前提とした容積に設定さ
れる請求項１,４または５の何れかに記載の発泡成形
型。6. The air flow accommodating passage (21, 22, n) is based on the total volume of air and gas finally confined in the protruding spaces (15, 16, n) communicating with each other. The foaming mold according to any one of claims 1, 4 and 5, wherein the foaming mold is set to a volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22580099A JP4206572B2 (en) | 1999-08-09 | 1999-08-09 | Foam mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22580099A JP4206572B2 (en) | 1999-08-09 | 1999-08-09 | Foam mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001047450A true JP2001047450A (en) | 2001-02-20 |
| JP4206572B2 JP4206572B2 (en) | 2009-01-14 |
Family
ID=16834992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22580099A Expired - Fee Related JP4206572B2 (en) | 1999-08-09 | 1999-08-09 | Foam mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4206572B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7481637B2 (en) | 2004-05-12 | 2009-01-27 | Woodbridge Foam Corporation | Vented mold and method for producing molded article |
-
1999
- 1999-08-09 JP JP22580099A patent/JP4206572B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7481637B2 (en) | 2004-05-12 | 2009-01-27 | Woodbridge Foam Corporation | Vented mold and method for producing molded article |
| US7878785B2 (en) | 2004-05-12 | 2011-02-01 | Proprietect L.P. | Vented mold and method for producing molded article |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4206572B2 (en) | 2009-01-14 |
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