JPH0218013A - Manufacture of integral foam molded item - Google Patents
Manufacture of integral foam molded itemInfo
- Publication number
- JPH0218013A JPH0218013A JP63169789A JP16978988A JPH0218013A JP H0218013 A JPH0218013 A JP H0218013A JP 63169789 A JP63169789 A JP 63169789A JP 16978988 A JP16978988 A JP 16978988A JP H0218013 A JPH0218013 A JP H0218013A
- Authority
- JP
- Japan
- Prior art keywords
- hollow
- skin material
- hollow skin
- polyurethane
- mold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000006260 foam Substances 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000000463 material Substances 0.000 claims abstract description 49
- 239000012778 molding material Substances 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000005187 foaming Methods 0.000 claims abstract description 6
- 238000002347 injection Methods 0.000 claims description 34
- 239000007924 injection Substances 0.000 claims description 34
- 229920002635 polyurethane Polymers 0.000 abstract description 15
- 239000004814 polyurethane Substances 0.000 abstract description 15
- 230000003014 reinforcing effect Effects 0.000 abstract description 4
- 238000000465 moulding Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 125000005442 diisocyanate group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、発泡体の外表面に中空表皮材を一体的に貼り
合わせてなる薄物の発泡成形品の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for manufacturing a thin foam molded product by integrally bonding a hollow skin material to the outer surface of a foam.
（従来の技術）
従来より、この種の一体発泡成形品を製造する方法とし
て、例えば特開昭６２−５８２１号公報や特開昭６２−
１３０８０８号公報等に開示されているように、中空表
皮材を成形型にセットしたのち該中空表皮材の中空部に
その開口部から発泡性成形材料を注入して発泡させるこ
とにより、発泡体の外表面に中空表皮材を一体的に貼り
合わせてなる発泡成形品を成形する方法が一般によく知
られている。(Prior Art) Conventionally, as a method for producing this type of integrally foamed molded product, for example, JP-A-62-5821 and JP-A-62-
As disclosed in Japanese Patent Application No. 130808, etc., after a hollow skin material is set in a mold, a foamable molding material is injected into the hollow part of the hollow skin material from the opening and foamed. A method of forming a foam molded product by integrally bonding a hollow skin material to the outer surface is generally well known.
（発明が解決しようとする課題）
ところが、得ようとする発泡成形品が厚みの薄い薄物で
ある場合には、当然、中空表皮材は偏平形状を呈してい
ることから、発泡性成形材料を注入する中空表皮材の開
口部が必然的に狭くなって時間当たりの発泡性成形材料
の注入量が少なくなり、中空表皮材の中空部を発泡性成
形材料で満たすのに長時間を要する。このため、該発泡
性成形材料が上記中空表皮材の中空部に完全に充填され
る前に発泡し始める結果、品質の優れた薄物の一体発泡
成形品を得ることができ難いという問題があった。(Problem to be solved by the invention) However, when the foamed molded product to be obtained is a thin product, since the hollow skin material naturally has a flat shape, it is necessary to inject the foamable molding material into the product. The opening of the hollow skin material inevitably becomes narrow, and the amount of foamable molding material injected per hour decreases, and it takes a long time to fill the hollow part of the hollow skin material with the foamable molding material. For this reason, the foamable molding material begins to foam before it is completely filled into the hollow part of the hollow skin material, resulting in the problem that it is difficult to obtain a thin, integrally foamed molded product of excellent quality. .
本発明はかかる点に鑑みてなされたものであり、その目
的とするところは、発泡体の外表面に一体的に貼り合わ
せられる偏平な中空表皮材の成形材料注入部の構造を改
良することにより、該中空表皮材の中空部に発泡性成形
材料を効率よく注入せしめて品質の優れた薄物の一体発
泡成形品を得んとすることにある。The present invention has been made in view of these points, and its purpose is to improve the structure of the molding material injection part of the flat hollow skin material that is integrally bonded to the outer surface of the foam. The object of the present invention is to efficiently inject a foamable molding material into the hollow part of the hollow skin material to obtain a thin, integrally foamed molded product of excellent quality.
（課題を解決するための手段）
上記の目的を達成するため、本発明の解決手段は、発泡
体の外表面に中空表皮材を一体的に貼り合わせてなる薄
物の発泡成形品の製造方法として、まず、発泡性成形材
料を注入する注入口、ランナおよび複数のゲートからな
る注入部が設けられた偏平な中空表皮材を用意する。次
いで、該中空表皮材を成形型にセットしたのち中空表皮
材の中空部に発泡性成形材料を上記注入部より高圧で注
入して発泡させることにより、発泡体の外表面に中空表
皮材を一体的に貼り合わせてなる薄物の発泡成形品を成
形する。その後、上記注入部の各ゲートを切断すること
により、上記発泡成形品から成形材料注入部分を除去す
るようにする。(Means for Solving the Problem) In order to achieve the above object, the solution of the present invention provides a method for manufacturing a thin foam molded product by integrally bonding a hollow skin material to the outer surface of a foam. First, a flat hollow skin material is prepared, which is provided with an injection port consisting of an injection port for injecting a foamable molding material, a runner, and a plurality of gates. Next, the hollow skin material is set in a mold, and a foamable molding material is injected into the hollow part of the hollow skin material from the injection part at high pressure and foamed, thereby integrating the hollow skin material on the outer surface of the foam. A thin foam molded product is formed by bonding materials together. Thereafter, the molding material injected portion is removed from the foamed molded product by cutting each gate of the injection portion.
（作用）
上記の構成により、本発明方法では、成形型にセットさ
れた偏平な中空表皮材の中空部に発泡性成形材料が上記
中空表皮材に設けられた注入部の注入口、ランナおよび
複数のゲートを経て高圧で注入され、上記発泡性成形材
料の発泡により、発泡体の外表面に中空表皮材を一体的
に貼り合わせてなる薄物の発泡成形品が成形される。そ
の後、上記注入部の各ゲートが切断されることにより、
上記発泡成形品から成形材料注入部分が除去される。(Function) With the above configuration, in the method of the present invention, the foamable molding material is injected into the hollow part of the flat hollow skin material set in the mold by the injection port, the runner, and the plurality of injection ports of the injection part provided in the hollow skin material. The foam is injected under high pressure through the gate, and the foamable molding material is foamed to form a thin foam molded product with a hollow skin material integrally bonded to the outer surface of the foam. Then, by cutting each gate of the injection part,
The molding material injected portion is removed from the foamed molded product.
このように、上記発泡性成形材料は、中空表皮材の中空
部に注入部の各ゲートから一斉にかつ速やかに注入され
て完全に充填される前に発泡することが防止され、よっ
て品質の優れた薄物の一体発泡成形品が確実に得られる
こととなる。In this way, the foamable molding material is injected into the hollow part of the hollow skin material simultaneously and promptly from each gate of the injection part, and is prevented from foaming before it is completely filled. This ensures that a thin, integrally foamed molded product can be obtained.
（実施例） 以下、本発明の実施例を図面に基づいて説明する。(Example) Embodiments of the present invention will be described below based on the drawings.
第１図は本発明方法により得られた厚みの薄い薄物の一
体発泡成形品としての、自動車等車両のインストルメン
トパネルを構成するロアパネル１を示し、該ロアパネル
１は、発泡体２の外表面に中空表皮材３を一体的に貼り
合わせてなるものである。FIG. 1 shows a lower panel 1 constituting an instrument panel of a vehicle such as an automobile, which is a thin integrally-foamed product obtained by the method of the present invention. It is made by integrally bonding hollow skin materials 3 together.
そのロアパネル１の製造要領を説明するに、まず、第２
図に示す如き偏平な中空表皮材３を用意する。該中空表
皮材３は、例えばポリプロピレン、ポリエチレン、ナイ
ロン等の合成樹脂をブロー成形することにより内部に中
空部４が形成され、その−辺側には、第３図および第５
図に拡大詳示するように、複数（５つ）の上下幅の狭い
ゲート５゜５・・・が補強溶着部６，６．・・・により
分断されて長手方向に所定間隔をあけて形成されている
。また、該各ゲート５は、第３図および第４図に拡大詳
示するように、長手方向に延びる縦断面半円形状のラン
ナ７に接続され、該ランナ７の長手方向はぼ中央には、
第５図に拡大詳示するように、複数条（２条）のリング
状の突起８．８を外周に有する筒状の注入口９が接続さ
れている。そして、上記各ゲート５、ランナ７および注
入口９により、例えば発泡性成形材料としてポリウレタ
ンを注入する注入部１０が構成されている。To explain the manufacturing procedure of the lower panel 1, first, the second
A flat hollow skin material 3 as shown in the figure is prepared. The hollow skin material 3 has a hollow part 4 formed therein by blow molding a synthetic resin such as polypropylene, polyethylene, nylon, etc., and the hollow part 4 is formed inside the hollow part 4 on the negative side thereof.
As shown in enlarged detail in the figure, a plurality (five) narrow vertical width gates 5.5... are connected to reinforcing welded parts 6, 6. ... and are formed at predetermined intervals in the longitudinal direction. Each gate 5 is connected to a runner 7 extending in the longitudinal direction and having a semicircular longitudinal section, as shown in enlarged detail in FIGS. 3 and 4. ,
As shown in enlarged detail in FIG. 5, a cylindrical injection port 9 having a plurality of (two) ring-shaped protrusions 8.8 on its outer periphery is connected. The gates 5, runners 7, and injection ports 9 constitute an injection section 10 for injecting, for example, polyurethane as a foamable molding material.
次いで、上述の如く構成された中空表皮材３を、第６図
に示すように、上型１１および下型１２からなる成形型
１３にセットし、該成形型１３の一側部（図で右側）に
設けられた高圧注入機のミキシングヘッド１４から、ポ
リウレタンの原液であるポリオール（Ａ液）とジイソシ
アネー）（Ｂ液）との混合液を上記中空表皮材３の中空
部４に注入部１０の各ゲート５を介して高圧で注入し、
ポリウレタンを発泡させる。これにより、ポリウレタン
の発泡体２の外表面に中空表皮材３を一体的に貼り合わ
せてなる薄物のロアパネル１が成形される。Next, the hollow skin material 3 configured as described above is set in a mold 13 consisting of an upper mold 11 and a lower mold 12, as shown in FIG. ) A mixed solution of polyol (liquid A), which is a stock solution of polyurethane, and diisocyanate (liquid B) is injected into the hollow part 4 of the hollow skin material 3 from the mixing head 14 of the high-pressure injection machine installed in the injection part 10. Inject at high pressure through each gate 5,
Foam polyurethane. As a result, a thin lower panel 1 is formed by integrally bonding the hollow skin material 3 to the outer surface of the polyurethane foam 2.
その後、このロアパネル１を成形型１３から取り出し、
該ロアパネル１の一辺側に一体的に付着している成形材
料注入部分を注入部１０の各ゲート５および補強溶着部
６を切断することにより、上記ロアパネル１から成形材
料注入部分を除去し、第１図に示すような製品を得る。After that, this lower panel 1 is taken out from the mold 13,
The molding material injected portion integrally attached to one side of the lower panel 1 is removed from the lower panel 1 by cutting each gate 5 and reinforcing welded portion 6 of the injection part 10. A product as shown in Figure 1 is obtained.
なお、上記中空表皮材３の注入部１０の反対側にはガス
抜き孔１５が形成されており、ポリウレタンの発泡時に
発生するガスを中空表皮材３の中空部４から抜くように
なされている。A gas vent hole 15 is formed on the opposite side of the hollow skin material 3 from the injection part 10, so that gas generated during foaming of polyurethane is vented from the hollow portion 4 of the hollow skin material 3.
このように、本実施例では、ポリウレタンを成形型１３
にセットされた中空表皮材３の中空部４に上記中空表皮
材３の注入部１０の注入口９、ランナ７および各ゲート
５を経て高圧で注入し、上記ポリウレタンの発泡により
、発泡体２の外表面に上記中空表皮材３を一体的に貼り
合わせてなる薄物のロアパネル１を成形した後、上記注
入部１０の各ゲート５および補強溶着部６を切断するこ
とにより、上記ロアパネル１から成形材料注入部分を除
去する。In this way, in this example, polyurethane is applied to the mold 13.
The polyurethane is injected into the hollow part 4 of the hollow skin material 3 set at a high pressure through the injection port 9 of the injection part 10 of the hollow skin material 3, the runner 7, and each gate 5, and the polyurethane is foamed. After molding a thin lower panel 1 made by integrally bonding the hollow skin material 3 to the outer surface, the molding material is removed from the lower panel 1 by cutting each gate 5 and reinforcing welded part 6 of the injection part 10. Remove the injection part.
したがって、上記ポリウレタンを中空表皮材３の中空部
４に注入部１０の各ゲート５から一斉にかつ速やかに注
入せしめて不十分な充填状態での発泡を防止し得、これ
により品質の優れた薄物のロアパネル１を確実に得るこ
とができる。Therefore, the above-mentioned polyurethane can be injected into the hollow part 4 of the hollow skin material 3 all at once and quickly from each gate 5 of the injection part 10, thereby preventing foaming in an insufficiently filled state. The lower panel 1 can be reliably obtained.
また、上記実施例では、中空表皮材３の注入部１０の注
入口９に突起８，８を形成しているので、該注入口９に
ポリウレタン注入時の樹脂圧が作用しても、上記突起８
，８の成形型１３への係合作用により、注入口９は成形
型１３に対してずれのことがなく、よってポリウレタン
の漏れを確実に防止することができる。Further, in the above embodiment, since the protrusions 8, 8 are formed in the injection port 9 of the injection part 10 of the hollow skin material 3, even if resin pressure is applied to the injection port 9 during polyurethane injection, the protrusions 8
, 8 to the mold 13, the injection port 9 does not shift relative to the mold 13, and leakage of polyurethane can therefore be reliably prevented.
なお、上記実施例では、発泡成形品が自動車等車両のイ
ンストルメントパネルを構成するロアパネル１である場
合を示したが、他の薄物の発泡成形品にも適用可能なこ
とはいうまでもない。In the above embodiment, the foam molded product is the lower panel 1 constituting the instrument panel of a vehicle such as an automobile, but it goes without saying that the present invention can also be applied to other thin foam molded products.
また、上記実施例では、発泡体２を構成する発泡性成形
材料としてポリウレタンを用いたが、他の樹脂を用いる
ことも可能である。Further, in the above embodiment, polyurethane was used as the foamable molding material constituting the foam body 2, but it is also possible to use other resins.
（発明の効果）
以上説明したように、本発明方法によれば、発泡性成形
材料を注入する注入口、ランナおよび複数のゲートから
なる注入部が設けられた中空表皮材を成形型にセットし
、その後、該中空表皮材の中空部に発泡性成形材料を上
記注入部より高圧で注入するので、該発泡性成形材料を
中空表皮材の中空部に一斉にかつ速やかに注入せしめて
品質の優れた薄物の一体発泡成形品を確実に得ることが
できる。(Effects of the Invention) As explained above, according to the method of the present invention, a hollow skin material provided with an injection port consisting of an injection port for injecting a foamable molding material, a runner, and a plurality of gates is set in a mold. Then, the foamable molding material is injected into the hollow part of the hollow skin material from the injection part at high pressure, so that the foamable molding material is injected all at once into the hollow part of the hollow skin material, resulting in excellent quality. It is possible to reliably obtain a thin integrally foamed molded product.
第１図は本発明方法により得られたロアパネルの斜視図
、第２図は中空表皮材の斜視図、第３図は第２図の■−
■線における断面図、第４図は第２図のｒＶ−ｒＶ線に
おける断面図、第５図は第２図のＶ−Ｖ線における断面
図、第６図はロアパネルの成形状態を示す成形型の縦断
正面図である。
１・・・ロアパネル（発泡成形品）、２・・・発泡体、
３・・・中空表皮材、４・・・中空部、５・・・ゲート
、７・・・ランナ、９・・・注入口、１０・・・注入部
、１３・・・成形型。
第２図Fig. 1 is a perspective view of a lower panel obtained by the method of the present invention, Fig. 2 is a perspective view of a hollow skin material, and Fig. 3 is a perspective view of the lower panel obtained by the method of the present invention.
Figure 4 is a cross-sectional view taken along the line rV-rV in Figure 2, Figure 5 is a cross-sectional view taken along the line V-V in Figure 2, Figure 6 is a mold showing the molding state of the lower panel. FIG. 1... Lower panel (foam molded product), 2... Foam,
3... Hollow skin material, 4... Hollow part, 5... Gate, 7... Runner, 9... Inlet, 10... Injection part, 13... Molding mold. Figure 2
Claims (1)
せてなる薄物の発泡成形品の製造方法であって、発泡性
成形材料を注入する注入口、ランナおよび複数のゲート
からなる注入部が設けられた偏平な中空表皮材を用意し
、次いで、該中空表皮材を成形型にセットしたのち中空
表皮材の中空部に発泡性成形材料を上記注入部より高圧
で注入して発泡させることにより、発泡体の外表面に中
空表皮材を一体的に貼り合わせてなる薄物の発泡成形品
を成形し、その後、上記注入部の各ゲートを切断するこ
とにより、上記発泡成形品から成形材料注入部分を除去
することを特徴とする一体発泡成形品の製造方法。(1) A method for manufacturing a thin foam molded product by integrally bonding a hollow skin material to the outer surface of a foam, which comprises an injection port for injecting a foamable molding material, a runner, and a plurality of gates. A flat hollow skin material having a section is prepared, and then the hollow skin material is set in a mold, and a foamable molding material is injected into the hollow part of the hollow skin material at high pressure from the injection part to cause foaming. By this, a thin foam molded product is formed by integrally bonding a hollow skin material to the outer surface of the foam, and then, by cutting each gate of the injection part, the molding material is removed from the foam molded product. A method for producing an integrally foamed molded product, characterized by removing an injected part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63169789A JPH0218013A (en) | 1988-07-07 | 1988-07-07 | Manufacture of integral foam molded item |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63169789A JPH0218013A (en) | 1988-07-07 | 1988-07-07 | Manufacture of integral foam molded item |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0218013A true JPH0218013A (en) | 1990-01-22 |
Family
ID=15892910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63169789A Pending JPH0218013A (en) | 1988-07-07 | 1988-07-07 | Manufacture of integral foam molded item |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0218013A (en) |
-
1988
- 1988-07-07 JP JP63169789A patent/JPH0218013A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0424435B1 (en) | Process for injection molding | |
| US6024911A (en) | Method of producing a molded article having a hollow rim | |
| JPH03121820A (en) | Hollow molded material and its molding method | |
| US6843954B2 (en) | Injection molding techniques utilizing fluid channels | |
| JP3303621B2 (en) | Interior material and manufacturing method thereof | |
| JPH0218013A (en) | Manufacture of integral foam molded item | |
| JPH06305343A (en) | Instrument panel core for vehicle and molding method thereof | |
| US5417916A (en) | Injection molding method utilizing primary and secondary resin flow paths | |
| EP1257411B1 (en) | Multi-component injection moulding with liquid injection for articles with knit lines and article produced thereby | |
| JPH0453169B2 (en) | ||
| JP3025163B2 (en) | Core material for integral foam molding and integral foam molding method | |
| JPH0354896Y2 (en) | ||
| JPH08155975A (en) | Production of interior material | |
| JPH0452117A (en) | Method for molding module cover of air bag apparatus | |
| JPH041011A (en) | Manufacture of resin molding | |
| JPH08183042A (en) | Core material for foam molding and production of foamed molded product | |
| JP2950656B2 (en) | Molding method of foamed resin molded product | |
| JP3062034B2 (en) | Headrest manufacturing method | |
| JPH1035289A (en) | Vehicle door grip and manufacture thereof | |
| JP2000127200A (en) | Method, mold, and molding for partly decorated integral forming of skin material | |
| JPH04331115A (en) | Joint structure of synthetic resin hollow body | |
| KR950008993B1 (en) | Method of manufacturing steering wheel | |
| JPH0251375B2 (en) | ||
| JPH0234014Y2 (en) | ||
| JPS61213112A (en) | Reaction injection molding method |