JPH0780195B2 - Rim-molded sandwich structure and method for manufacturing the same - Google Patents
Rim-molded sandwich structure and method for manufacturing the sameInfo
- Publication number
- JPH0780195B2 JPH0780195B2 JP63113543A JP11354388A JPH0780195B2 JP H0780195 B2 JPH0780195 B2 JP H0780195B2 JP 63113543 A JP63113543 A JP 63113543A JP 11354388 A JP11354388 A JP 11354388A JP H0780195 B2 JPH0780195 B2 JP H0780195B2
- Authority
- JP
- Japan
- Prior art keywords
- foam
- rim
- skin layer
- internal high
- internal
- 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.)
- Expired - Lifetime
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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
- B29C70/72—Encapsulating inserts having non-encapsulated projections, e.g. extremities or terminal portions of electrical components
-
- 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
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
- B29C67/246—Moulding high reactive monomers or prepolymers, e.g. by reaction injection moulding [RIM], liquid injection moulding [LIM]
-
- 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
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はリム成形方法、特に芯材に特別な被膜を施した
リム成形サンドイッチ構造物の製造方法に関するもので
ある。The present invention relates to a rim forming method, and more particularly to a method for manufacturing a rim formed sandwich structure in which a core material is coated with a special coating.
自動車のリヤスポイラーなどの部品を製作するために、
リム（RIM）成形という技術が用いられる。これは製作
しようとする部品の型内へ液状の反応性プラスチックを
瞬間的に注入し、急速に反応硬化させ、脱型するもので
ある。In order to manufacture parts such as the rear spoiler of a car,
A technology called rim (RIM) molding is used. In this method, a liquid reactive plastic is instantaneously injected into a mold of a part to be manufactured, and then rapidly cured and then demolded.
従来のリム成形には、１つの金型内で製品の剛性が余り
低下しない程度に物品全体を低発泡（比度0.25〜1.0g/c
m3）させる方法と、全体を非発泡のまま成形する方法と
の２つがある。In conventional rim molding, low foaming (ratio of 0.25 to 1.0 g / c
m 3 ) and a method in which the whole is molded in a non-foamed state.
全体が非発泡であれば、剛性は低下しないが、使用材料
を多量に要し、重量がかかり、コスト高となる不利があ
る。If the whole is non-foamed, the rigidity does not decrease, but there is a disadvantage that a large amount of material is used, the weight is heavy, and the cost is high.
低発泡成形方法においては、金型温度とプラスチック温
度を微妙にコントロールして、表皮部分に積極的に非発
泡層ができるようにし、サンドイッチ構造に近い形を作
り出すことが行われている。In the low-foam molding method, the mold temperature and the plastic temperature are delicately controlled to positively form a non-foamed layer on the skin portion, thereby creating a shape close to a sandwich structure.
ところが上記のような従来のリム成形には、下記に列記
するような種々の問題点がある。However, the conventional rim molding as described above has various problems as listed below.
（１）全体を低発泡成形する方法では、発泡反応と硬化
反応とに時間がかかるため、サイクルタイムが非発泡方
法より1.5〜２倍も長くなる上に、得られた成形品の表
面の平滑性が悪くなる。(1) In the method of low-foaming the whole, since the foaming reaction and the curing reaction take time, the cycle time is 1.5 to 2 times longer than that of the non-foaming method, and the surface of the obtained molded product is smooth. The sex becomes worse.
（２）上記（１）で表面に非発泡層を形成する方法は、
表面外観の向上と剛性アップを図る目的で行われる場合
には、非発泡層の厚さが一定になりにくいためヒケやウ
エルドが出やすくなり、かえって外観が悪くなる。(2) The method for forming a non-foamed layer on the surface in (1) above is
When it is carried out for the purpose of improving the surface appearance and increasing the rigidity, the thickness of the non-foamed layer is unlikely to be constant, so sink marks and welds are likely to occur, and the appearance is rather deteriorated.
（３）発泡方法においては、発泡により使用材料が若干
少なくなるため、ある程度の軽量化は可能であるが、発
泡剤を添加する必要があるため、全体的にはコストアッ
プとなる。(3) In the foaming method, the amount of material used is slightly reduced due to foaming, so that it is possible to reduce the weight to some extent, but since it is necessary to add a foaming agent, the overall cost increases.
（４）また、表面の非発泡の表皮層厚さは、金型とプラ
スチックの温度差によって形成されるため、設計者の要
求通りにコントロールすることは難しく、また発泡体の
密度も0.15以下の低密度には調整が極めて困難であり、
軽量化にも限界がある。(4) In addition, the thickness of the non-foamed skin layer on the surface is formed by the temperature difference between the mold and the plastic, so it is difficult to control it as required by the designer, and the density of the foam is 0.15 or less. Low density is extremely difficult to adjust,
There is a limit to weight reduction.
（５）リム成形品を自動車の車体等に取付けるために、
インサートを挿置して内部高発泡体を発泡させ発泡体に
インサート固定するが、インサートの固定は高発泡体に
よる固定のみでは固定力が不十分であり、成形品の使用
時間の経過とともにインサートが高発泡体内でぐらつ
き、その結果、リム成形品がぐらつくという問題点があ
った。(5) To attach the rim molded product to the body of an automobile,
Although the insert is inserted and the high foam inside is foamed and the insert is fixed to the foam, the fixing force of the insert is not sufficient if it is fixed only by the high foam, and the insert will not be used with the passage of time of use of the molded product. There has been a problem that the high-foam body wobbles, and as a result, the rim molded article wobbles.
従って本発明は、これら従来技術の問題点を解消し、リ
ム成形品に十分な剛性を保有させつつ可能な限り軽量化
し、かつコスト低減を図れる、表面に保護被膜を施した
内部の高発泡体を外観が優れた所定厚のスキン層によっ
て包み、インサートを強固に取付けたリム成形サンドイ
ッチ構造物の製造方法を提供することを目的とする。Therefore, the present invention solves these problems of the prior art, makes the rim molded product as light as possible while maintaining sufficient rigidity, and reduces the cost. It is an object of the present invention to provide a method for producing a rim-molded sandwich structure in which an insert is firmly attached to a rim-molded sandwich structure by wrapping it with a skin layer of a predetermined thickness having an excellent appearance.
また、本発明は、リム成形品のスキン層の厚さを設計者
の要求通りに精密にコントロールすることが容易で、優
れた外観のスキン層を形成することができる方法を提供
することを目的とする。Another object of the present invention is to provide a method capable of easily controlling the thickness of a skin layer of a rim molded product precisely as required by a designer and forming a skin layer having an excellent appearance. And
さらに本発明は、スキン層を軟質から硬質まで幅広い選
択範囲で形成できるリム成形品のサンドイッチ構造物の
製造方法を提供することも目的とする。Another object of the present invention is to provide a method for manufacturing a sandwich structure of a rim molded product, which can form a skin layer in a wide selection range from soft to hard.
また、本発明は、これらの方法により製造されたリム成
形サンドイッチ構造物を提供することも目的とする。It is also an object of the present invention to provide rim molded sandwich structures produced by these methods.
上記諸目的を達成するため、本発明はリム成形品を、内
部発泡体の成形とその表面への被膜の形成およびスキン
層のリム成形との三段階に分けて製作する方法を採用す
る。In order to achieve the above-mentioned objects, the present invention employs a method of manufacturing a rim molded article in three steps, namely, molding an internal foam, forming a coating film on the surface thereof, and rim molding a skin layer.
内部発泡体（または芯材ともいう）は、第１の成形型に
おいて、製品形状から、設計者が要求するスキン層の厚
さを差引いた大きさおよび形状に発泡成形される。この
発泡は好適に高発泡、例えば密度0.01〜0.20、より好適
には0.01〜0.15の程度に行なう。発泡材料としては、ポ
リスチレン、ポリプロピレン、ポリエチレン、フェノー
ル樹脂等を用いることができ、最終用途に応じて高硬度
（高剛性）のものからエネルギー吸収のよい半硬質や柔
軟性のものまで、任意に選択することができる。また、
内部高発泡体は、型内発泡または射出成形したものを適
当な大きさに裁断して成形されてもよい。The internal foam (or also referred to as a core material) is foam-molded in the first molding die into a size and shape in which the thickness of the skin layer required by the designer is subtracted from the product shape. This foaming is preferably performed at a high foaming density, for example, a density of 0.01 to 0.20, and more preferably 0.01 to 0.15. As the foam material, polystyrene, polypropylene, polyethylene, phenolic resin, etc. can be used. Depending on the end use, high hardness (high rigidity) to energy-absorbing semi-hard or flexible material can be selected arbitrarily. can do. Also,
The high internal foam may be formed by cutting an in-mold foam or injection molding into a suitable size.
内部発泡体の成形に際しては、最終製品の構造の一部と
なる金属製またはプラスチック等の各種インサートをそ
の基部の一部が発泡体の表面に露出するようにして、発
泡体の内部または表面に挿置し、または一部を外に突出
させて一体発泡成形する。When molding the internal foam, insert various metal or plastic inserts that will be part of the structure of the final product onto the inside or surface of the foam so that part of the base is exposed on the surface of the foam. It is inserted, or a part thereof is projected to the outside to perform integral foam molding.
ついでその内部高発泡体の表面及びインサートの基部の
露出した表面に、リム成形時の内圧に耐えるよう、また
内部高発泡体の強度、剛性をより向上させたり、リムウ
レタンとの密着性を増大させたり、その他内部高発泡体
に封入あるいは取付けたりするインサートや各種部品の
固定を強化する目的で次の（１）〜（３）のいずれかの
方法で保護被膜によるコーティング処理を行なう。この
保護被膜は、インサートの基部の露出した表面上で内部
高発泡体の表面上より厚くなるように形成され、基部の
内部高発泡体への固定を強化している。Then, on the surface of the internal high foam and the exposed surface of the base of the insert, to withstand the internal pressure during rim molding, further improve the strength and rigidity of the internal high foam, and increase the adhesion with the rim urethane. For the purpose of strengthening the fixation of inserts and various parts that are enclosed or attached to other high foams in the interior, coating treatment with a protective film is performed by any of the following methods (1) to (3). The protective coating is formed to be thicker on the exposed surface of the base of the insert than on the surface of the internal high foam to enhance the anchoring of the base to the internal high foam.
（１）タルク、炭酸カルシウムなどの無機フィラー、ガ
ラスなどの繊維状物を添加した、または添加しないポリ
エステル、エポキシ、ポリウレタンなどや内部高発泡体
に不活性な、ビニルまたはアクリル系その他プラスチッ
クのアルコール溶液やエマルジョン溶液など（反応性プ
ラスチックコーティング材）を塗布し、乾燥または硬化
させる。(1) Alcohol solution of vinyl, acrylic or other plastic which is inert to polyester, epoxy, polyurethane, etc. and high internal foam with or without addition of inorganic fillers such as talc and calcium carbonate and fibrous substances such as glass Or emulsion solution (reactive plastic coating material) is applied and dried or cured.
（２）上記コーティング材を塗布した上に、内部高発泡
体の必要な個所へ必要な大きさの、合成、天然および無
機繊維よりなる各種の不織布、編織物、パルプなどの繊
維素シートもしくはプラスチックフィルムを粘布し、乾
燥または硬化させる （３）ポリアミド（例えばナイロン６など）のギ酸溶液
（３％飽和）を数回塗布し、乾燥させて被膜を作る。(2) After applying the above coating material, various non-woven fabrics of various sizes such as synthetic, natural and inorganic fibers, knitted fabrics, fibrous sheets such as pulp, or plastics are applied to required places of the internal high foam. The film is applied and dried or cured. (3) A solution of polyamide (for example, nylon 6) in formic acid (3% saturation) is applied several times and dried to form a film.
本発明の方法によれば、スキン層の厚さを所望通りにコ
ントロールでき、平面性のよい優れた外観が得られる。
また、所定厚さのスキン層と内部高発泡体の低密度芯材
との組合せにより、従来実施できなかった軽量化と高剛
性とを共に備えたリム成形サンドイッチ構造体が得られ
る。According to the method of the present invention, the thickness of the skin layer can be controlled as desired, and an excellent appearance with good flatness can be obtained.
Further, by combining the skin layer of a predetermined thickness and the low-density core material of the internal high-foam body, it is possible to obtain a rim-molded sandwich structure having both weight reduction and high rigidity which could not be achieved conventionally.
本発明の方法によれば、各種のインサートや取付部品を
装着した高発泡体の芯材でも、表面保護被膜の形成によ
り、リム成形材料の注入からよく保護されると共に安定
したインサートが得られ、従来では得られなかった比剛
性の優れたインサート入りリム成形発泡体サンドイッチ
構造体を得ることができる。According to the method of the present invention, even in a high-foam core material with various inserts and mounting parts mounted thereon, the formation of the surface protective coating provides a stable insert that is well protected from the injection of the rim molding material, It is possible to obtain a rim-molded foam sandwich structure with insert having excellent specific rigidity, which has not been obtained conventionally.
図面を参照して、本発明の好適実施例について説明す
る。A preferred embodiment of the present invention will be described with reference to the drawings.
こうして、被膜で表面を覆われた内部高発泡体を芯材と
して、第２の成形型にセットし、芯材と成形型との隙間
に反応性プラスチックまたは反応性エラストマーを注入
してリム成形し、芯材と一体化したスキン層を形成す
る。反応性プラスチックには、ポリウレタン、ポリアミ
ド、ポリエステルまたはそれらの複合体を用いることが
できる。スキン層は、非発泡、発泡、硬質、半硬質のい
ずれであってもよい。In this way, the inner high-foam body whose surface is covered with the film is used as the core material, set in the second molding die, and the reactive plastic or the reactive elastomer is injected into the gap between the core material and the molding die to form the rim. , Forming a skin layer integrated with the core material. Polyurethane, polyamide, polyester, or a composite thereof can be used as the reactive plastic. The skin layer may be non-foamed, foamed, rigid or semi-rigid.
第１図は、自動車のエヤスタビライザー（リヤースポイ
ラー）を本発明の方法によって製造する例を示す。第１
図において、内部高発泡体１は第１の成形型、すなわち
発泡成形型において、例えば半硬質ポリスチレンフォー
ムから作られる。高発泡体１には、取付金具としてのイ
ンサート２がインサート成形される。インサート２は基
部３を有し、基部３は高発泡体１の表面に露出するよう
にされる。内部高発泡体１は低密度、例えば半硬質のポ
リスチレン（密度0.02）に型内発泡成形または射出発泡
成形させて軽量化を図る。FIG. 1 shows an example of manufacturing an automobile air stabilizer (rear spoiler) by the method of the present invention. First
In the figure, the internal high foam 1 is made in a first mold, ie a foam mold, for example from semi-rigid polystyrene foam. An insert 2 as a mounting member is insert-molded on the high foam body 1. The insert 2 has a base portion 3, and the base portion 3 is exposed on the surface of the high foam body 1. The internal high-foam body 1 is made of low-density, for example, semi-rigid polystyrene (density 0.02) by in-mold foam molding or injection foam molding to reduce the weight.
ついで第１図で示すように、この内部高発泡体の表面に
ウレタンコーティングを塗布し、硬化させて保護被膜５
を形成する。この時インサート部へ、ウレタンコーティ
ングが硬化する前にクロスまたは不織布の小片を貼りつ
けて（図示せず）硬化させたり（クロスまたは不織布へ
コーティング剤が含浸するが、さらにその上からコーテ
ィングを行ない、硬化させてもよい）、あるいは要求に
よっては、スポイラーの上面と下面に必要な大きさの不
織布またはクロスを上記と同じように貼付け（図示せ
ず）て、被膜を設ける。保護被膜５は、インサート２の
基部３の露出した表面６上の保護被膜5aが高発泡体の表
面７上の保護被膜5bより厚く形成される。場合によって
は高発泡体１の中へ入りこんでいる基部３の一部へも保
護皮膜を施すなどの処置をする（図示せず）ことによっ
て基部３は高発泡体１に対し、しっかりと固定される。
好適には被膜5aの厚さは0.5mm〜3.0mmの範囲の厚さであ
り、被膜ｂの厚さは0.3mm〜2.5mmの範囲の厚さである。Then, as shown in FIG. 1, a urethane coating is applied to the surface of the internal high-foam body and cured to form a protective film 5.
To form. At this time, before the urethane coating is cured, a small piece of cloth or non-woven fabric is attached to the insert portion (not shown) and cured (the cloth or non-woven fabric is impregnated with a coating agent, but coating is further performed on it). It may be cured) or, if desired, a non-woven fabric or cloth of the required size is attached (not shown) to the upper and lower surfaces of the spoiler in the same manner as described above to provide a coating. The protective coating 5 is formed such that the protective coating 5a on the exposed surface 6 of the base 3 of the insert 2 is thicker than the protective coating 5b on the high foam surface 7. In some cases, the base 3 is firmly fixed to the high foam 1 by applying a protective film (not shown) to a part of the base 3 that has entered the high foam 1. It
Suitably the coating 5a has a thickness in the range 0.5 mm to 3.0 mm and the coating b has a thickness in the range 0.3 mm to 2.5 mm.
次にこの内部高発泡体を第２の成形型、すなわちリム成
形型に芯材としてセットし、硬質ポリウレタンを材料と
して、スキン層４を第１図のごとくリム成形する。スキ
ン層４は非発泡層として形成し、製品スタビライザーの
剛性を保証する。スキン層４の厚さは、芯材１と第２成
形型の内部表面との隙間として設定されるから、設計者
の意図通りの正確な厚さを実現することができる。Next, this inner high-foam body is set as a core material in a second molding die, that is, a rim molding die, and the skin layer 4 is rim-molded as shown in FIG. The skin layer 4 is formed as a non-foamed layer to ensure the rigidity of the product stabilizer. Since the thickness of the skin layer 4 is set as a gap between the core material 1 and the inner surface of the second molding die, an accurate thickness as intended by the designer can be realized.
次に第２図は、コンベア用ローラーを本発明の方法によ
り製造する例を説明するもので、まず、第２図に示すよ
うな一対のベアリングアセンブリーをインサート22とし
て第１の成形型にセットする。インサート22は、その全
体が基部を構成しており、その一部が高発泡体21から露
出するように挿置されてセットされる。Next, FIG. 2 explains an example of manufacturing a conveyor roller by the method of the present invention. First, a pair of bearing assemblies as shown in FIG. To do. The insert 22 entirely constitutes a base portion, and is inserted and set so that a part thereof is exposed from the high foam body 21.
次に、ローラ本体部を硬質フェノール樹脂フォームによ
り内部高発泡体21として型内発泡成形または射出発泡成
形する。内部高発泡体21にはシャット孔25を残しておく
が、あらかじめ接着性をよくするため、エポキシ接着剤
を塗布しておいたインサート22としっかり接着させる。Next, the roller main body is in-mold foam-molded or injection foam-molded as a high internal foam body 21 of hard phenol resin foam. Although a shut hole 25 is left in the internal high foam 21, it is firmly adhered to the insert 22 coated with an epoxy adhesive in order to improve the adhesiveness in advance.
ついで、この内部高発泡体21の全面およびリムウレタン
と接するインサート22の部分にエポキシコーティングを
保護被膜23として施す。この保護被膜23は、インサート
22の露出した表面26上の被膜23aが高発泡体21の表面27
上の保護被膜23bより厚く形成されて、インサート22の
内部高発泡体21への固定を強化する。高荷重用ローラー
には、内部高発泡体21の外周側面にガラス繊維クロスま
たはガラス繊維マットを、第１図の場合の不織布または
クロスと同じ要領で貼付け、強固な被膜23を作る（図示
せず）。なお、この場合ガラス繊維クロスまたはガラス
繊維マットは、両端のインサート22の外周側面まで覆う
ようにし、被膜23が内部高発泡体21とインサート22を一
体とした連続被膜となるようにする。Then, an epoxy coating is applied as a protective film 23 to the entire surface of the internal high-foam body 21 and the portion of the insert 22 in contact with the rim urethane. This protective coating 23 is an insert
The coating 23a on the exposed surface 26 of the 22 is the surface 27 of the high foam 21.
It is formed thicker than the upper protective coating 23b to enhance the fixation of the insert 22 to the internal high foam 21. On the high load roller, a glass fiber cloth or a glass fiber mat is attached to the outer peripheral side surface of the inner high foam body 21 in the same manner as the nonwoven fabric or cloth in the case of FIG. 1 to form a strong coating 23 (not shown). ). In this case, the glass fiber cloth or the glass fiber mat covers the outer peripheral side surfaces of the inserts 22 at both ends so that the coating 23 is a continuous coating in which the internal high foam 21 and the insert 22 are integrated.
この後、被膜23を施したインサート付き内部高発泡体21
をリム成形型にセットして、スキン層24をリム成形す
る。スキン層24の材質は、ミルドガラス繊維入り硬質ポ
リウレタンである。シャット孔25にはシャットが挿通さ
れる。被膜23の存在は、スキン層の成形時にリム成形材
料の注入による芯材21の劣化を防護すると共にイサート
22の固定を強化し、さらに製品ローラーの使用時に芯材
とスキン層との間の剥離防止ならびにリム成形後の強度
と剛性の向上を図るもので、こうして本発明によれば、
軽量であって剛性が高く、ある程度の弾性を備え、かつ
耐荷重性に優れたコンベア用ローラーが設計者の要求通
り正確な仕様で製作され得る。This is followed by an internal high foam 21 with insert that has a coating 23 applied.
Is set in a rim forming die, and the skin layer 24 is rim formed. The material of the skin layer 24 is hard polyurethane containing milled glass fiber. A shut is inserted into the shut hole 25. The presence of the coating 23 protects the core material 21 from deterioration due to the injection of the rim molding material during molding of the skin layer, and at the same time, inserts
In order to enhance the fixing of 22, further prevent the peeling between the core material and the skin layer when using the product roller and improve the strength and rigidity after rim molding, thus, according to the present invention,
A conveyor roller that is lightweight, has high rigidity, has a certain degree of elasticity, and is excellent in load bearing can be manufactured with accurate specifications as required by the designer.
本発明の方法によれば、任意のインサートをあらかじめ
入れて成形しておいた高発泡体は、目的に応じインサー
ト部を各種仕様の被膜で厚く補強できるので、所望の取
付け強度、剛性が得られる外に高発泡体を芯材として使
用するため、スキン層の成形は薄肉成形で済み、従来の
ような厚肉成形とはならないことから、成形サイクルを
かなり早くすることができる利点がある。According to the method of the present invention, since the high-foam body in which an arbitrary insert has been inserted and molded in advance can thickly reinforce the insert portion with a coating of various specifications depending on the purpose, desired mounting strength and rigidity can be obtained. Since the highly foamed material is used as the core material outside, the skin layer can be formed by thin-wall molding, and unlike conventional thick-wall molding, there is an advantage that the molding cycle can be considerably shortened.
また、本発明によれば非発泡のスキン層の厚さが自由に
選べる上に、芯材の表面に各種仕様の被膜を施すため、
芯材の密度を高発泡によって極めて小さくすることがで
きるので、従来の（RIM）では得られない、非常に軽く
て強度、剛性の大きい、比較度、比剛性の優れたサンド
イッチ構造体を得ることができる。Further, according to the present invention, the thickness of the non-foamed skin layer can be freely selected, and in addition, a coating of various specifications is applied to the surface of the core material,
Since the density of the core material can be made extremely small by high foaming, it is possible to obtain a sandwich structure that is extremely light and has high strength, high rigidity, comparative degree and specific rigidity, which cannot be obtained by conventional (RIM). You can
図は本発明の方法およびその製品を説明する断面図であ
って、 第１図はエアスタビライザーのリム成形の例、 第２図はコンベア用ローラーのリム成形の例を示す。 〔主要符号〕 １、21……内部高発泡体（芯材） ２、22……インサート 23……保護被膜 5a、23a……インサートの露出した表面上の保護被膜 5b、23b……内部高発泡体の表面上の保護被膜 ４、24……スキン層。FIG. 1 is a cross-sectional view for explaining the method of the present invention and its product, wherein FIG. 1 shows an example of rim forming of an air stabilizer, and FIG. 2 shows an example of rim forming of a conveyor roller. [Main code] 1,21 …… Internal high foam (core material) 2,22 …… Insert 23 …… Protective coating 5a, 23a …… Protective coating on exposed surface of insert 5b, 23b …… Internal high foam Protective coating on the surface of the body 4, 24 ... Skin layer.
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 Ｂ３２Ｂ 7/02 9268−4Ｆ // Ｂ２９Ｋ 23:00 25:00 61:04 75:00 77:00 105:04 105:20 Ｂ２９Ｌ 9:00 Continuation of front page (51) Int.Cl. 6 Identification number Office reference number FI technical display location B32B 7/02 9268-4F // B29K 23:00 25:00 61:04 75:00 77:00 105: 04 105: 20 B29L 9:00
Claims (15)
インサートを該基部の一部が表面に露出するべく挿置し
て、内部高発泡体を発泡成形し、 ２）前記内部高発泡体の表面及び前記基部の露出した表
面に保護被膜を、前記基部の露出した表面上の保護被膜
が前記内部高発泡体の表面上の保護被膜より厚くなるべ
く形成して、前記基部の前記内部高発泡体への固定を強
化し、ついで ３）第２の成形型に前記内部高発泡体を芯材としてセッ
トし、芯材と成形型の隙間に反応性プラスチックまたは
反応性エラストマーを注入し、リム成形して前記芯材と
一体化したスキン層を形成することから成るリム成形サ
ンドイッチ構造物の製造方法。(1) In the first molding die, an insert having a base portion is inserted so that a part of the base portion is exposed on the surface to foam-mold an internal high-foamed body, and 2) the internal high-foamed body. A protective coating is formed on the body surface and the exposed surface of the base so that the protective coating on the exposed surface of the base is thicker than the protective coating on the surface of the internal high foam, and the internal height of the base is increased. Strengthen the fixation to the foam, and then 3) set the internal high foam as a core material in the second molding die, inject the reactive plastic or the reactive elastomer into the gap between the core material and the molding die, and rim the rim. A method for producing a rim-molded sandwich structure, which comprises molding to form a skin layer integrated with the core material.
発泡させる請求項１記載の方法。2. The method of claim 1 wherein said high internal foam expands to a density of 0.01 to 0.20.
である請求項２記載の方法。3. The method of claim 2 wherein the internal high foam is polystyrene foam.
ムである請求項２記載の方法。4. The method of claim 2, wherein the internal high foam is polypropylene foam.
である請求項２記載の方法。5. The method of claim 2 wherein said internal high foam is polyethylene foam.
請求項２記載の方法。6. The method of claim 2 wherein the internal high foam is a phenolic resin.
たはその複合体である請求項１記載の方法。7. The method of claim 1, wherein the reactive plastic is polyurethane or a composite thereof.
はその複合体である請求項１記載の方法。8. The method according to claim 1, wherein the reactive plastic is a polyamide or a composite thereof.
たはその複合体である請求項１記載の方法。9. The method according to claim 1, wherein the reactive plastic is polyester or a composite thereof.
８または９記載の方法。10. The non-foaming skin layer,
The method according to 8 or 9.
または９項記載の方法。11. The foamed skin layer according to claim 7, 8.
Alternatively, the method according to item 9.
は11項記載の方法。12. The method according to claim 10, wherein the skin layer is hard.
たは11項記載の方法。13. The method according to claim 10, wherein the skin layer is semi-rigid.
添加した、または添加しない、硬質、半硬質または軟質
のポリウレタン、エポキシ、ポリエステルなどの反応性
プラスチックコーティング材を塗布し硬化させるか、 ii）ポリアミドのギ酸溶液を塗布し乾燥させるか、また
は iii）前記コーティング材を塗布した上に、合成、天然
および無機繊維よりなる各種不織布、編織物、パルプな
どの繊維素シートもしくはプラスチックフィルムを貼用
し乾燥して硬化させるか、のいずれかにより行なう請求
項１記載の方法。14. The formation of the protective coating comprises: i) Reactive plastic coating material such as hard, semi-hard or soft polyurethane, epoxy, polyester with or without addition of inorganic filler, fibrous material or other organic material. Or ii) applying a polyamide formic acid solution and drying, or iii) applying the above-mentioned coating material and then various synthetic, natural and inorganic fibers such as non-woven fabrics, knitted fabrics, fibers such as pulp. The method according to claim 1, which is carried out by either applying a base sheet or a plastic film, drying and curing.
８、９、10、11、12、13又は14に記載の方法により製造
されたリム成形サンドイッチ構造物。15. Claims 1, 2, 3, 4, 5, 6, 7,
A rim-molded sandwich structure produced by the method of 8, 9, 10, 11, 12, 13 or 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63113543A JPH0780195B2 (en) | 1988-05-12 | 1988-05-12 | Rim-molded sandwich structure and method for manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63113543A JPH0780195B2 (en) | 1988-05-12 | 1988-05-12 | Rim-molded sandwich structure and method for manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01285316A JPH01285316A (en) | 1989-11-16 |
| JPH0780195B2 true JPH0780195B2 (en) | 1995-08-30 |
Family
ID=14614978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63113543A Expired - Lifetime JPH0780195B2 (en) | 1988-05-12 | 1988-05-12 | Rim-molded sandwich structure and method for manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0780195B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5160772A (en) * | 1990-04-23 | 1992-11-03 | Nippon Zeon Co., Ltd. | Composite molded articles |
| DE19650854C1 (en) * | 1996-11-27 | 1998-03-12 | Petri Ag | Injection-moulding an object and covering it with polyurethane using two-component plastic |
| GB2415162A (en) * | 2004-06-15 | 2005-12-21 | L & L Products Inc | Improvements in or relating to laminar mouldings |
| EP1857247A1 (en) * | 2006-05-18 | 2007-11-21 | Recticel | Method for producing a multilayered part |
| CN102470583A (en) | 2010-03-26 | 2012-05-23 | 三菱重工塑胶科技有限公司 | Method for manufacturing a fiber-reinforced composite material |
| US20190240881A1 (en) * | 2016-10-18 | 2019-08-08 | Basf Se | Integrated articles with substantially seamless, preferably substantially faultless shells and preparation thereof |
-
1988
- 1988-05-12 JP JP63113543A patent/JPH0780195B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01285316A (en) | 1989-11-16 |
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