JPS63176113A - Manufacture of foamed sheet monolithically formed with frame - Google Patents
Manufacture of foamed sheet monolithically formed with frameInfo
- Publication number
- JPS63176113A JPS63176113A JP62009233A JP923387A JPS63176113A JP S63176113 A JPS63176113 A JP S63176113A JP 62009233 A JP62009233 A JP 62009233A JP 923387 A JP923387 A JP 923387A JP S63176113 A JPS63176113 A JP S63176113A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- force
- side part
- bottom force
- divided
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000006260 foam Substances 0.000 claims abstract description 27
- 238000005187 foaming Methods 0.000 claims abstract description 14
- 239000011347 resin Substances 0.000 claims abstract description 8
- 229920005989 resin Polymers 0.000 claims abstract description 8
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 5
- 238000010097 foam moulding Methods 0.000 claims description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 abstract description 13
- 239000002994 raw material Substances 0.000 abstract description 13
- 235000019589 hardness Nutrition 0.000 description 11
- 239000011162 core material Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 4
- 239000003566 sealing material Substances 0.000 description 4
- 238000005192 partition Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006757 chemical reactions by type Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 150000003673 urethanes Chemical class 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はフレームを挿入したシートパッドの一体発泡成
形による製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of manufacturing a seat pad into which a frame is inserted by integral foam molding.
自動車等のシートパッドは成形動向にウレタン等の発泡
性樹脂を注入し、発泡硬化させて製造している。このシ
ートパッドは、シートのホールド性を向上させるため、
例えば第２図に示すように、成形型ｌａ内に仕切り板１
２を挿入して該成形型１ａを区切り、区切られた各発泡
室内に硬度の異なる発泡原料を注入し、発泡はせ、発泡
が終了する前に該仕切り板１２を引き抜き、発泡硬化さ
せることに工す、サイド部を高硬度フオーム９とし、メ
イン部（生部）を低硬度フオーム８としている（特開昭
６１−１４６５１４号参照）。また、シートの剛性を高
めるために、第３図に示すように、成形型１６内にシー
トフレーム７をセントし、発泡原料を核型内に注入し、
発泡硬化させに、フレーム７を挿入したシート１０が製
造されている。なお、図中、９は高硬度７オーム、８は
低硬度フオームである。Seat pads for automobiles and the like are manufactured by injecting a foamable resin such as urethane into a molding process and then curing the foam. This seat pad improves the hold of the seat,
For example, as shown in FIG. 2, a partition plate 1 is placed inside the mold la.
2 is inserted to partition the mold 1a, foaming raw materials with different hardnesses are injected into each partitioned foaming chamber, foaming is performed, and before foaming is completed, the partition plate 12 is pulled out to allow the foaming to harden. The side parts are made of high hardness foam 9, and the main part (green part) is made of low hardness foam 8 (see JP-A-61-146514). In addition, in order to increase the rigidity of the sheet, as shown in FIG.
A sheet 10 is manufactured in which a frame 7 is inserted for foaming and curing. In addition, in the figure, 9 is a high hardness foam of 7 ohms, and 8 is a low hardness foam.
上記のようなサイド部が高硬度になった異硬度フオーム
の７−トパンドは全体の剛性が高いため、脱型がしに＜
＜、大きな説型力と時間を必要とする。更に、シートフ
レームが挿入されたシートパッドでは著しく剛性が高ま
り、更に脱型しに＜＜、そして金型がアンダーカットに
なっている場合は脱型が不可能となる。したがっに、最
近一般的に用いられている、第４図に実線０）で示すよ
うな後部サイドがカントされたシートパッド形状とする
ことはできず、想像線（ロ）で示すような、成形型をア
ンダーカントとする必要のない形状とすることが必要と
なり、意匠上の制約がある。そこで、下型の側部を分割
し、可動としに、成形時はアンダーカントの形とし、製
品を取り出すときは側部が開くようにすることが考えら
れるが、下型の分割部分に、発泡圧により発泡原料が浸
み込み、そこで発泡してパリが発生し、パリを取り除く
後処理が必要となる。また、そのパリが十分に取り除け
ないと人体に当たり不快となる。7-Topand, which has a different hardness form with high hardness on the side parts, has high overall rigidity, so it is easy to remove from the mold.
＜、Requires great expositional ability and time. Furthermore, the rigidity of the seat pad into which the seat frame is inserted is significantly increased, making demolding difficult and impossible if the mold is undercut. Therefore, it is not possible to form a seat pad with canted rear sides as shown by the solid line 0) in Fig. 4, which is commonly used these days. It is necessary to make the mold into a shape that does not require an undercant, and there are design restrictions. Therefore, it is conceivable to divide the side part of the lower mold so that it is movable and to form an undercant shape during molding, so that the side part opens when taking out the product. The foaming raw material permeates due to the pressure, foams there, and creates debris, which requires post-treatment to remove the debris. Moreover, if the particles are not removed sufficiently, they will come into contact with the human body and cause discomfort.
一方、パリの発生を防止した一体発泡成形方法としては
、特開昭６０−１４７８１１号に、芯材を型面に取り付
けたときに芯材開口部の周囲と該型面との間にできる隙
間をシールできるようにあらかじめ型面の当該部位にシ
ール材を配設してから芯材を取り付け、そしてシール材
で囲まれた型面には離型剤を塗らずに発泡性プラスチ７
クを注入し、硬化、離型してシール材で囲んだ型面にパ
リを付着せしめ、その後の成形におけるシール材として
利用する方法が開示されている。しかしながら、該方法
は、下型を分割して可動とした成形型には適用できず、
分割部分にパリが堆積して該分割部分が変形し、成形型
の破損の原因となる。On the other hand, as an integral foam molding method that prevents the occurrence of fringing, Japanese Patent Application Laid-Open No. 147811/1983 discloses a gap formed between the periphery of the opening of the core material and the mold surface when the core material is attached to the mold surface. A sealing material is placed on the relevant part of the mold surface in advance so that the core material can be attached, and the mold surface surrounded by the sealing material is coated with foamed plastic 7 without applying a mold release agent.
A method is disclosed in which the material is injected, cured, and released from the mold to adhere to the surface of the mold surrounded by a sealing material, and used as a sealing material in subsequent molding. However, this method cannot be applied to molds in which the lower mold is divided and movable.
Paris accumulates on the divided portions, deforms the divided portions, and causes damage to the mold.
本発明は上記問題点を解決するためのもので、フレーム
が挿入されたシートパッドの脱型可能で、パリの発生し
ない製造方法を提供することを目的とするものである。The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a manufacturing method that allows a seat pad into which a frame is inserted to be removed from the mold and that does not cause cracks.
本発明のフレーム一体発泡シートの製造方法は、フレー
ムを挿入したシートパッドを一体発泡成形する際、に上
型と、側部が分割された下型とからなる成形型の下型の
分割部分に核部を内側から覆うように被膜を設け、フレ
ームを該成形型内に配置したのち、発泡性樹脂を該成形
型内に注入し、発泡させることを特徴とするものである
。The method for producing an integrally foamed seat with a frame according to the present invention is that when a seat pad into which a frame is inserted is integrally foam-molded, the split portion of the lower mold of the mold is made up of an upper mold and a lower mold with divided sides. The method is characterized in that a film is provided to cover the core portion from the inside, a frame is placed in the mold, and then a foamable resin is injected into the mold and foamed.
本発明においに、下型の分割部分に核部を内側から覆う
ように被膜を設けるが、この被膜は弾性フィルムやフオ
ーム体を張りつけたり、２液反応型のウレタンフオーム
をスプレーすることにより設けることができる。In the present invention, a coating is provided on the divided portion of the lower mold so as to cover the core from the inside, but this coating may be provided by pasting an elastic film or foam, or by spraying a two-component reactive urethane foam. Can be done.
また、本発明に訃いに、成形型内に注入する発泡性樹脂
は、発泡して発泡樹脂となるもので、モノマー、プレポ
リマー、ポリマー又はそれらの混合物であることができ
、通常シートに用いられているウレタン発泡原料も用い
ることができる。Further, as an additional feature of the present invention, the foamable resin injected into the mold is foamed to become a foamed resin, and can be a monomer, prepolymer, polymer, or a mixture thereof, and is usually used for sheets. The urethane foaming raw materials that have been described can also be used.
成形型が上型と、側部が分割された下型とからなるため
、下型の側部の内側がアンダーカントの形状でも、下型
の（ｉ１１部を開くことにより、成形されたシートパッ
ドを核側部と干渉することなく、容易に脱型することが
できる。The mold consists of an upper mold and a lower mold with split side parts, so even if the inside of the side part of the lower mold has an undercant shape, by opening the (i11 part) of the lower mold, the molded seat pad can be easily removed from the mold without interfering with the side of the nucleus.
一方、下型の側部が分割されているが、該分割部分に該
部分を内側から覆うように被膜を設けるため、成形型内
に発泡性樹脂を注入し、発泡させても、発泡性樹脂の発
泡圧による分割部分への浸み込みが該被膜により防止さ
れ、パリが発生しない。On the other hand, the side part of the lower mold is divided, but since a coating is provided on the divided part to cover the part from the inside, even if foamable resin is injected into the mold and foamed, the foamable resin The coating prevents the foaming pressure from penetrating into the divided portions, and no flaking occurs.
本発明を一実施例により図面を参照して説明する。 The present invention will be explained by way of one embodiment with reference to the drawings.
本実施例に用いる成形型は、第１図（ｂ）に示すように
、シートパッドの前面及び上下端面の形状の型面を有す
る下型本体２と７−トパンドの側面の形状の型面を有す
る側部３とからなる容器状の下型１と、シートパッドの
後面の形状の型面を有するふた状の上型４とで構成され
、下型１の側部８はアンダーカットの形状で、かつ外側
へ開くことができるように下型本体２にヒンジ５によっ
て取り付けられている。As shown in FIG. 1(b), the mold used in this example has a lower mold body 2 having a mold surface in the shape of the front and upper and lower end surfaces of the seat pad, and a mold surface in the shape of the side surfaces of the topand. It is composed of a container-shaped lower mold 1 having a side portion 3 with a side portion 3, and a lid-shaped upper mold 4 having a mold surface in the shape of the rear surface of the seat pad, and the side portion 8 of the lower mold 1 is in the shape of an undercut. , and is attached to the lower die main body 2 by a hinge 5 so as to be able to open outward.
シートパッドの成形は、まず、下型１の下型本体２と側
部８との分割部分に、該分割部分を内側から覆うように
２液反応型のウレタンフオ−ム原料をスプレーガン１１
によって塗布する。To mold the seat pad, first, a two-component reaction type urethane foam raw material is sprayed onto the divided portion between the lower mold body 2 and the side portion 8 of the lower mold 1 using a spray gun 11 so as to cover the divided portion from the inside.
Apply by.
すると、発泡硬化し、ウレタンフオームの被膜６が形成
され、その被膜６によって分割部分がシールされる。こ
のとき、ウレタンフオーム原料は大気に開放された状態
で発泡するため、分割部分には入り込まず、パリは発生
しない。次いで下型１内にインサートフレーム７をセン
トし、高硬度フォーｌ、用ウレタン発泡原料を下型１の
サイド部分に注入し、低硬度フオーム用ウレタン発泡原
料を中央に注入し、第１図（１））に示すように上型４
を閉じる。注入されたウレタン発泡原料は発泡して成形
型内に充満し、被膜とインサートフレーム７を一体化し
た、高硬度フオーム９と低硬度フオーム８とからなるシ
ート１０が形成される。このウレタン発泡原料が発泡す
ると、発泡圧が生じるが、下型１の分割部分は被膜６に
よってシールされているため、ウレタン発泡原料が該分
割部分に浸み込むことはなく、パリは発生しない。次い
で第１図（Ｃ）に示すように、上型４を開け、下型１の
側部８を外側へ開き、一体成形されたシート１０を取り
出す。側部８が外側へ垂直以上に開くため、該側部８と
は干渉せず、スムーズに脱型することができる。Then, the foam hardens to form a urethane foam coating 6, which seals the divided portion. At this time, since the urethane foam raw material is foamed while being exposed to the atmosphere, it does not enter the divided portion and no flaking occurs. Next, the insert frame 7 is inserted into the lower mold 1, and the urethane foam raw material for high hardness foam is injected into the side part of the lower mold 1, and the urethane foam raw material for low hardness foam is injected into the center. 1) Upper mold 4 as shown in)
Close. The injected urethane foaming raw material foams and fills the mold, forming a sheet 10 consisting of a high hardness foam 9 and a low hardness foam 8, in which the coating and the insert frame 7 are integrated. When this urethane foam raw material foams, foaming pressure is generated, but since the divided portion of the lower mold 1 is sealed by the coating 6, the urethane foam raw material does not seep into the divided portion, and no paris occurs. Next, as shown in FIG. 1(C), the upper mold 4 is opened, the side portions 8 of the lower mold 1 are opened outward, and the integrally molded sheet 10 is taken out. Since the side portions 8 open outward more than vertically, there is no interference with the side portions 8, and the mold can be removed smoothly.
本発明のフレーム一体発泡ンートの製造方法は、上記し
たように、上型と、側部を分割した下型とからなる成形
製を用い、分？ｉす部分に被膜を設けて製造するため、
サイド部の前側が広がり、フレームを挿入したシートパ
ッドでも、下型の側部と干渉せずに容易に取り出すこと
ができ、また、下型の分割部分に相当する位置にパリが
発生しない。その結果、シート製品の外形が優れるとと
もに、分割部分のパリ処理等の後加工が不要となり、生
産性が著しく向上する。As described above, the method for producing the integrally foamed frame trunk of the present invention uses a molded product consisting of an upper mold and a lower mold with divided sides, Since it is manufactured by providing a coating on the i part,
The front side of the side part is widened, and even a seat pad with a frame inserted can be easily taken out without interfering with the side part of the lower mold, and no cracks are generated at positions corresponding to the divided parts of the lower mold. As a result, the outer shape of the sheet product is excellent, and post-processing such as paring of the divided portions is not required, resulting in a marked improvement in productivity.
更に、デザイン状の制約がなくなり、意匠性を向上させ
ることができる。Furthermore, there are no restrictions on the design, and the design quality can be improved.
第１図（ａ）は本発明の一実施例の被膜形成時の下型の
断面図、第１図〜）は本発明の一実施例の発泡後の成形
型の断面図、第１図（Ｃ）は本発明の一実施例のシート
脱型時の下型の断面図、第２図は従来技術による発泡時
の成形型の断面図、
第３図は従来技術によるフレームを挿入したシートの成
形時の成形型の断面図、
第４図は７−トの斜視図を表わす。
図中、
１・・・・・・・・・・・・下型 ２・・・・・・
・・・・・・下型本体３・・・・・・・・・・・・側部
４・・・・・・・・・・・・上型６・・・・・・
・・・・・・被膜７・・・・・・・・・・・・フレーム
１０・・・・川・・シート
第１図
１０・・ ゛レート
（Ｃ）
ｎFIG. 1(a) is a cross-sectional view of the lower die during film formation according to an embodiment of the present invention, FIGS. C) is a cross-sectional view of the lower mold when demolding the sheet according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the mold during foaming according to the prior art, and FIG. 3 is a cross-sectional view of the sheet with a frame inserted according to the prior art. A cross-sectional view of the mold during molding, and FIG. 4 is a perspective view of the 7th part. In the diagram, 1......Lower mold 2...
・・・・・・Lower mold body 3・・・・・・・・・・・・Side part 4・・・・・・・・・Upper mold 6・・・・・・
・・・・・・Coating 7・・・・・・・・・・・・Frame 10・・・River・・Sheet Fig. 1 10・・Rate (C) n
Claims (1)
に、上型と、側部が分割された下型とからなる成形型の
下型の分割部分に該部を内側から覆うように被膜を設け
、フレームを該成形型内に配置したのち、発泡性樹脂を
該成形型内に注入し、発泡させることを特徴とするフレ
ーム一体発泡シートの製造方法。When integrally foam molding the seat pad into which the frame is inserted, a coating is provided on the divided part of the lower mold of the mold consisting of an upper mold and a lower mold with divided side parts so as to cover the part from the inside, A method for manufacturing a frame-integrated foam sheet, which comprises placing a frame in the mold, and then injecting a foamable resin into the mold to cause foaming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62009233A JPS63176113A (en) | 1987-01-19 | 1987-01-19 | Manufacture of foamed sheet monolithically formed with frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62009233A JPS63176113A (en) | 1987-01-19 | 1987-01-19 | Manufacture of foamed sheet monolithically formed with frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63176113A true JPS63176113A (en) | 1988-07-20 |
Family
ID=11714687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62009233A Pending JPS63176113A (en) | 1987-01-19 | 1987-01-19 | Manufacture of foamed sheet monolithically formed with frame |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63176113A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2634685A1 (en) * | 1988-07-26 | 1990-02-02 | Ikeda Bussan Co | |
| WO2004058474A1 (en) * | 2002-12-25 | 2004-07-15 | Bridgestone Corporation | Method of producing foam-molded product, metallic mold, and component for mettalic mold |
| JP2008119995A (en) * | 2006-11-14 | 2008-05-29 | Inoac Corp | Manufacturing method for foam molded article having skin, and foam molding die |
-
1987
- 1987-01-19 JP JP62009233A patent/JPS63176113A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2634685A1 (en) * | 1988-07-26 | 1990-02-02 | Ikeda Bussan Co | |
| WO2004058474A1 (en) * | 2002-12-25 | 2004-07-15 | Bridgestone Corporation | Method of producing foam-molded product, metallic mold, and component for mettalic mold |
| JP2008119995A (en) * | 2006-11-14 | 2008-05-29 | Inoac Corp | Manufacturing method for foam molded article having skin, and foam molding die |
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