JPH0612903Y2 - Resin molding - Google Patents
Resin moldingInfo
- Publication number
- JPH0612903Y2 JPH0612903Y2 JP1989134492U JP13449289U JPH0612903Y2 JP H0612903 Y2 JPH0612903 Y2 JP H0612903Y2 JP 1989134492 U JP1989134492 U JP 1989134492U JP 13449289 U JP13449289 U JP 13449289U JP H0612903 Y2 JPH0612903 Y2 JP H0612903Y2
- Authority
- JP
- Japan
- Prior art keywords
- core
- resin
- polyurethane resin
- skin
- molded body
- 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
- 229920005989 resin Polymers 0.000 title claims description 36
- 239000011347 resin Substances 0.000 title claims description 36
- 238000000465 moulding Methods 0.000 title description 12
- 229920005749 polyurethane resin Polymers 0.000 claims description 35
- 239000000463 material Substances 0.000 claims description 17
- 238000005187 foaming Methods 0.000 claims description 16
- 210000003491 skin Anatomy 0.000 description 18
- 229920005830 Polyurethane Foam Polymers 0.000 description 5
- 239000011496 polyurethane foam Substances 0.000 description 5
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000000071 blow moulding Methods 0.000 description 2
- 210000002615 epidermis Anatomy 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000005056 polyisocyanate Substances 0.000 description 2
- 229920001228 polyisocyanate Polymers 0.000 description 2
- 229920005862 polyol Polymers 0.000 description 2
- 150000003077 polyols Chemical class 0.000 description 2
- 238000007666 vacuum forming Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
Landscapes
- Laminated Bodies (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は樹脂成形体の改良に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to improvement of a resin molding.
（従来の技術） 樹脂成形体としては、従来から特開昭５３−４００６９
号公報に例示されるように、鋼板製のコアが該コアとの
間に発泡ポリウレタン樹脂体を介在させて表皮で覆われ
てなるものが知られている。(Prior Art) Conventionally, as a resin molded body, Japanese Patent Laid-Open No. 530069 / 53-40069 has been used.
As exemplified in Japanese Patent Laid-Open Publication No. JP-A No. 2003-242, there is known a core made of a steel plate which is covered with a skin by interposing a foamed polyurethane resin body between the core and the core.
また、この樹脂成形体は、通常、上型と下型とからなる
成形型における下型のキャビティ面に真空成形等によっ
て得た表皮を載置する一方、上型のキャビティ面に、前
記表皮との間に空間が形成される大きさのコアを取り付
けた後、前記表皮の内面に発泡倍率が１０倍程度の発泡
性ポリウレタン樹脂材を塗布し、しかる後、該発泡性ポ
リウレタン樹脂材を発泡させて前記空間を発泡ポリウレ
タン樹脂体で充填することにより製造されている。In addition, this resin molded body is usually placed on the cavity surface of the lower mold in a molding die consisting of an upper mold and a lower mold, while placing a skin obtained by vacuum molding or the like on the cavity surface of the upper mold. After attaching a core having a size such that a space is formed between them, a foamable polyurethane resin material having a foaming ratio of about 10 is applied to the inner surface of the skin, and then the foamable polyurethane resin material is foamed. It is manufactured by filling the space with a foamed polyurethane resin body.
ところが、近時は、前記のようにして得られる樹脂成形
体を軽量化するため、コアとして中空部を有する樹脂製
のものを用いた樹脂成形体が提案されている。However, recently, in order to reduce the weight of the resin molded body obtained as described above, a resin molded body using a resin-made core having a hollow portion has been proposed.
（考案が解決しようとする課題） しかるに、前記のように中空部を有する樹脂製のコアを
用いる場合、発泡性ポリウレタン樹脂材が発泡する際、
その発泡圧（通常、１〜２Kg／cm2である）によってコ
アがへこみ、そしてコアがへこんだ状態で樹脂成形体は
成形される。このため、成形後、樹脂成形体を成形型か
ら大気圧中に取り出すと、へこんでいたコアが元の状態
に戻るので、樹脂成形体が膨張変形してしまうという問
題がある。(Problems to be solved by the invention) However, when the resin core having a hollow portion is used as described above, when the expandable polyurethane resin material foams,
The foaming pressure (usually 1 to 2 kg / cm 2 ) dents the core, and the resin molding is molded with the core dented. For this reason, when the resin molded body is taken out of the molding die into the atmospheric pressure after molding, the dented core returns to its original state, which causes a problem that the resin molded body expands and deforms.
前記に鑑みて、本考案は、中空部を有する樹脂製のコア
を用いた樹脂成形体であるにも拘らず、該樹脂成形体が
脱型後に膨張変形しないようにすることを目的とする。In view of the above, it is an object of the present invention to prevent the resin molded body from expanding and deforming after demolding, even though the resin molded body uses a resin core having a hollow portion.
（課題を解決するための手段） 前記の目的を達成するため、本考案は、発泡ポリウレタ
ン樹脂体を得るための発泡性ポリウレタン樹脂材の発泡
倍率を限定すると共に、コアの外面と表皮の内面とを発
泡ポリウレタン樹脂体により一体的に接着するものであ
る。(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention limits the expansion ratio of the expandable polyurethane resin material for obtaining the expanded polyurethane resin body, and at the same time, the outer surface of the core and the inner surface of the outer skin are Is integrally bonded by a foamed polyurethane resin body.
具体的に本考案が講じた解決手段は、中空部を有する樹
脂製のコアが該コアとの間に発泡ポリウレタン樹脂体を
介在させて表皮で覆われてなる樹脂成形体を前提とし、
前記コアの外面と前記表皮の内面とは、発泡倍率が２〜
５倍であり且つ接着性を有する発泡性ポリウレタン樹脂
材を発泡させてなる発泡ポリウレタン樹脂体により一体
的に接着されている構成とするものである。Specifically, the solution means taken by the present invention is premised on a resin molded body in which a resin core having a hollow portion is covered with a skin by interposing a polyurethane foam resin body between the core and the core,
The outer surface of the core and the inner surface of the skin have a foaming ratio of 2 to
The structure is such that the foamed polyurethane resin material, which is five times and has adhesiveness, is integrally bonded by a foamed polyurethane resin body formed by foaming.
（作用） 前記の構成により、発泡性ポリウレタン樹脂材の発泡倍
率が２倍以上であり且つ接着性を有しているため、該発
泡性ポリウレタン樹脂材がコアと表皮との間の空間に十
分充填されてコアと表皮とを強固に接着している。(Function) With the above-mentioned configuration, since the expansion ratio of the expandable polyurethane resin material is 2 times or more and has the adhesiveness, the expandable polyurethane resin material is sufficiently filled in the space between the core and the skin. The core and the epidermis are firmly adhered to each other.
また、発泡性ポリウレタン樹脂材の発泡倍率が５倍以下
であるため、発泡時に樹脂製のコアがへこむことがない
ので、脱型後、コアひいては樹脂成形体が膨張すること
がない。Further, since the expansion ratio of the expandable polyurethane resin material is 5 times or less, the resin core does not dent during foaming, so that the core, and thus the resin molded body, does not expand after demolding.
（実施例） 以下、本考案の実施例を図面に基づいて説明する。Embodiment An embodiment of the present invention will be described below with reference to the drawings.
第１図〜第３図は本考案の一実施例に係る樹脂成形体Ａ
例えばクラッシュパッドの製造工程を示し、第４図は樹
脂成形体Ａの断面構造を示している。1 to 3 show a resin molding A according to an embodiment of the present invention.
For example, the manufacturing process of the crash pad is shown, and FIG. 4 shows the cross-sectional structure of the resin molded body A.
樹脂成形体Ａは、第４図に示すように、中空部１を有す
る合成樹脂製のコア２を該コア２との間に発泡ポリウレ
タン樹脂体３を介在させて表皮４で覆ってなるものであ
って、コア２の外面と表皮４の内面とは発泡ポリウレタ
ン樹脂体３によって一体的に接着されている。As shown in FIG. 4, the resin molded body A is formed by covering a synthetic resin core 2 having a hollow portion 1 with a polyurethane foam resin body 3 between the core 2 and a skin 4 and interposing the foamed polyurethane resin body 3 therebetween. Therefore, the outer surface of the core 2 and the inner surface of the skin 4 are integrally bonded by the foamed polyurethane resin body 3.
コア２は熱可塑性の合成樹脂をブロー成形して得た中空
体であり、表皮４は合成樹脂製シートを所定形状に真空
成形して得た成形体である。The core 2 is a hollow body obtained by blow molding a thermoplastic synthetic resin, and the skin 4 is a molded body obtained by vacuum forming a synthetic resin sheet into a predetermined shape.
また、発泡ポリウレタン樹脂体３は、ポリイソシアネー
トとポリオールと発泡剤との混合物よりなり、発泡率が
２〜５倍になるよう配合された接着性を有する発泡性ポ
リウレタン樹脂剤をを発泡させて得たものである。この
発泡性ポリウレタン樹脂材としては、具体的には三洋化
成工業株式会社製のサンプレン（商品名）を用い、Ｅ−
２００Ａ（ポリオール）とＥ−２００Ｂ（ポリイソシア
ネート）とを１００：５０〜８０の割合で配合したもの
が好ましい。Further, the foamed polyurethane resin body 3 is made of a mixture of polyisocyanate, polyol and a foaming agent, and is obtained by foaming a foamable polyurethane resin agent having adhesiveness which is blended so that the foaming rate is 2 to 5 times. It is a thing. As the foamable polyurethane resin material, specifically, Sanprene (trade name) manufactured by Sanyo Kasei Co., Ltd. was used, and E-
A mixture of 200A (polyol) and E-200B (polyisocyanate) in a ratio of 100: 50 to 80 is preferable.
この場合、発泡性ポリウレタン樹脂材の発泡率を２〜５
倍の範囲内に設定する理由は次の通りである。すなわ
ち、発泡率が２倍未満であると、発泡性ポリウレタン樹
脂剤が成形時にコア２と表皮４との間の空間に十分に充
填されないために、コア２と発泡ポリウレタン樹脂体３
或いは発泡ポリウレタン樹脂体３と表皮４との接着力が
十分に得られないからである。また、発泡率が５倍を超
えると、成形時に発泡性ポリウレタン樹脂材の発泡圧が
上昇し過ぎてコア２がへこみ、脱型後に、コア２ひいて
は樹脂成形体Ａが膨張変形するからである。In this case, the foaming rate of the expandable polyurethane resin material is 2 to 5
The reason for setting the double range is as follows. That is, if the foaming rate is less than twice, the space between the core 2 and the skin 4 is not sufficiently filled with the expandable polyurethane resin agent at the time of molding, so that the core 2 and the expanded polyurethane resin body 3 are formed.
Alternatively, it is because the adhesive force between the foamed polyurethane resin body 3 and the skin 4 cannot be sufficiently obtained. Further, if the foaming ratio exceeds 5 times, the foaming pressure of the foamable polyurethane resin material excessively rises during molding and the core 2 is dented, and after the mold is removed, the core 2 and thus the resin molded body A is expanded and deformed.
以下、第１図〜第３図に基づいて樹脂成形体Ａを製造す
る方法について説明する。Hereinafter, a method for producing the resin molded body A will be described with reference to FIGS. 1 to 3.
まず、第１図に示すように、下型５のキャビティ面５ａ
に真空成形により得た表皮４を載置した後、塗布ガン６
を矢印のように移動しつつ前記配合の発泡性ポリウレタ
ン樹脂材を表皮４の内面に略均一に塗布する。First, as shown in FIG. 1, the cavity surface 5a of the lower mold 5 is formed.
After placing the skin 4 obtained by vacuum forming on the
While moving in the direction of arrow, the foamable polyurethane resin material having the above composition is applied to the inner surface of the outer skin 4 substantially uniformly.
次に、第２図に示すように、上型７のキャビティ面７ａ
にブロー成形により得た合成樹脂製のコア２を取り付け
た後、成形型を閉じると共に発泡性ポリウレタン樹脂材
を発泡させて、コア２の外面と発泡ポリウレタン樹脂体
３、及び発泡ポリウレタン樹脂体３と表皮４の内面とを
各々一体的に接着させる。Next, as shown in FIG. 2, the cavity surface 7a of the upper mold 7 is
After the synthetic resin core 2 obtained by blow molding is attached to the mold, the mold is closed and the foamable polyurethane resin material is foamed to form the outer surface of the core 2, the foamed polyurethane resin body 3, and the foamed polyurethane resin body 3. The inner surface of the skin 4 is integrally bonded to each other.
この場合、表皮４の内面に発泡性ポリウレタン樹脂剤を
塗布した後、３０秒以内に型閉じを行なうことが好まし
い。その理由は、塗布後３０秒を超えると発泡性ポリウ
レタン樹脂材が発泡し過ぎて、発泡ポリウレタン樹脂体
３が厚くなり、所望形状の樹脂成形体Ａが得られないた
めである。In this case, it is preferable to perform mold closing within 30 seconds after applying the foamable polyurethane resin agent to the inner surface of the skin 4. The reason is that if it exceeds 30 seconds after application, the foamable polyurethane resin material foams too much, and the polyurethane foam resin body 3 becomes thick, so that the resin molded body A having a desired shape cannot be obtained.
発泡性ポリウレタン樹脂材の発泡が完了した後、型開き
を行なって第４図に示すような樹脂成形体Ａを得る。After the foaming of the expandable polyurethane resin material is completed, the mold is opened to obtain a resin molded body A as shown in FIG.
（考案の効果） 以上説明したように、本考案に係る樹脂成形体による
と、コアの外面と表皮の内面とは、発泡倍率が２〜５倍
であり且つ接着性を有する発泡性ポリウレタン樹脂材を
発泡させてなる発泡ポリウレタン樹脂体により一体的に
接着されているため、コアと表皮との間に発泡ポリウレ
タン樹脂体が十分に充填されていると共に、脱型後にコ
アが復元膨張しないので脱型後における樹脂成形体の膨
張変形を確実に防止することができる。(Effects of the Invention) As described above, according to the resin molded product of the present invention, the outer surface of the core and the inner surface of the epidermis have a foaming ratio of 2 to 5 times and an adhesive polyurethane foam material. Since it is integrally bonded by a foamed polyurethane resin body formed by foaming, the polyurethane foam resin body is sufficiently filled between the core and the skin, and the core does not restore and expand after demolding. It is possible to reliably prevent expansion and deformation of the resin molded body later.
第１図〜第３図は各々本考案の一実施例である樹脂成形
体の製造過程を示す断面図、第４図は前記樹脂成形体の
断面図である。 Ａ…樹脂成形体 １…中空部 ２…コア ３…発泡ポリウレタン樹脂体 ４…表皮1 to 3 are cross-sectional views showing a manufacturing process of a resin molding which is one embodiment of the present invention, and FIG. 4 is a cross-sectional view of the resin molding. A ... Resin molded body 1 ... Hollow part 2 ... Core 3 ... Foamed polyurethane resin body 4 ... Skin
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 // Ｂ２９Ｋ 75:00 105:04 Ｂ２９Ｌ 9:00 4Ｆ ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 5 Identification number Office reference number FI technical display location // B29K 75:00 105: 04 B29L 9:00 4F
Claims (1)
間に発泡ポリウレタン樹脂体を介在させて表皮で覆われ
てなる樹脂成形体において、前記コアの外面と前記表皮
の内面とは、発泡倍率が２〜５倍であり且つ接着性を有
する発泡性ポリウレタン樹脂材を発泡させてなる発泡ポ
リウレタン樹脂体により一体的に接着されていることを
特徴とする樹脂成形体。1. A resin molded body in which a resin core having a hollow portion is covered with a skin by interposing a foamed polyurethane resin body between the core and the outer surface of the core and the inner surface of the skin. A resin molded product having a foaming ratio of 2 to 5 and being integrally bonded by a foamed polyurethane resin body obtained by foaming a foamable polyurethane resin material having adhesiveness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989134492U JPH0612903Y2 (en) | 1989-11-20 | 1989-11-20 | Resin molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989134492U JPH0612903Y2 (en) | 1989-11-20 | 1989-11-20 | Resin molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0372414U JPH0372414U (en) | 1991-07-22 |
| JPH0612903Y2 true JPH0612903Y2 (en) | 1994-04-06 |
Family
ID=31681827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989134492U Expired - Lifetime JPH0612903Y2 (en) | 1989-11-20 | 1989-11-20 | Resin molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0612903Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7399484B2 (en) * | 2004-06-30 | 2008-07-15 | Kimberly-Clark Worldwide, Inc. | System and method for providing therapy to an individual |
-
1989
- 1989-11-20 JP JP1989134492U patent/JPH0612903Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0372414U (en) | 1991-07-22 |
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