JPH02139211A - Method of molding rim product having recessed and projected pattern - Google Patents
Method of molding rim product having recessed and projected patternInfo
- Publication number
- JPH02139211A JPH02139211A JP63294052A JP29405288A JPH02139211A JP H02139211 A JPH02139211 A JP H02139211A JP 63294052 A JP63294052 A JP 63294052A JP 29405288 A JP29405288 A JP 29405288A JP H02139211 A JPH02139211 A JP H02139211A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- rim
- cavity
- mold member
- product
- 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
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000000465 moulding Methods 0.000 title claims description 14
- 239000002994 raw material Substances 0.000 claims abstract description 30
- 238000010107 reaction injection moulding Methods 0.000 abstract description 48
- 238000002347 injection Methods 0.000 abstract description 4
- 239000007924 injection Substances 0.000 abstract description 4
- 238000005187 foaming Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
- B29C45/561—Injection-compression moulding
- B29C2045/5645—Resilient compression means
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Injection 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、凹凸模様を有するＲｒ〜１製品を成形する方
法の改良に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a method for molding an Rr~1 product having an uneven pattern.
（従来の技術）
従来より、反応射出成形（ＲＩＭ）により成形される製
品として、例えば自動車のスポイラ−があるが、このス
ポイラ−に見映えの向上や宣伝効果を付与するために、
表面に図形や文字あるいは記号等の凹凸模様を形成する
ことがある。(Prior Art) Conventionally, as a product molded by reaction injection molding (RIM), there is, for example, an automobile spoiler.
An uneven pattern such as figures, letters, or symbols may be formed on the surface.
そして、このような凹凸模様を有するスポイラ−等のＲ
ＩＭ製品を成形する要領は、第４図に示すように、上記
ＲＩＭ製品の凹凸模様を形作る形状部を有するキャビテ
ィ型ａと、該キャビティ型ａに対向して配置されたコア
型すとの間に構成されるキャビティＣ内にＲＩＭ原料６
を射出することにより、凹凸模様を有するＲＡＭ製品を
成形するようになされている。Then, the R of a spoiler etc. having such an uneven pattern is
The procedure for molding an IM product is as shown in FIG. RIM raw material 6 is placed in cavity C configured in
RAM products having an uneven pattern are molded by injection.
（発明が解決しようとする課題）
ところが、上記の従来のやり方では、ＲＩ Ｍ原料ｄが
キャビティＣ内に射出される際、キャビティ型ａの形状
部のＲＩＭ原料流動方向と反対側のコーナー側にＲＩＭ
原料ｄが行き亘り難く、第４図に示すように、該コーナ
ー側にエア溜りｅが生じ、その結果、第５図に示すよう
に、成形されたＲＩＭ製品製品子ルファベットｒＡＪか
らなる凹凸模様ｇに欠肉部り、 ｈ、・・・が発生す
るという問題があった。(Problem to be Solved by the Invention) However, in the above-mentioned conventional method, when the RIM raw material d is injected into the cavity C, the RIM material is RIM
It is difficult for the raw material d to spread, and as shown in FIG. 4, an air pocket e is generated on the corner side. As a result, as shown in FIG. There was a problem in that missing parts, h, etc. occurred.
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、成形段階で成形型の一部を適切に移
動させることにより、ＲＩＭ原料をキャビティ内の隅々
にまで満遍無く行き亘らせるようにし、これにより凹凸
模様に欠肉部のないＲＩＭ製品を確実に成形せんとする
ことにある。The present invention has been made in view of the above, and its purpose is to distribute the RIM raw material evenly to every corner of the cavity by appropriately moving a part of the mold during the molding stage. The purpose is to ensure that a RIM product with no missing parts in the uneven pattern is molded.
（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、凹凸
模様を有するＲＩＭ製品を成形する方法として、まず、
上記ＲＩＭ製品の凹凸模様の表面形状を形作る表面形状
部を有する第１型部材と、該第１型部材に対向して配置
された第２型部材と、該第２型部材に進退移動可能に設
けられ、上記ＲＩＭ製品の凹凸模様の裏面形状を形作る
裏面形状部を有するスライド型部材とを備えた成形型を
用意する。次いで、上記成形型を型締めした状態で、か
つ上記スライド型部材を第１型部材との間隔がＲＩＭ製
品の凹凸模様の肉厚寸法よりも狭くなるよう第１型部材
側に前進移動させた状態で、上記成形型のキャビティ内
にＲＩＭ原料を射出する。(Means for Solving the Problems) In order to achieve the above object, the solving means of the present invention first provides a method for molding a RIM product having an uneven pattern.
A first mold member having a surface shape portion that forms the surface shape of the uneven pattern of the RIM product, a second mold member disposed opposite to the first mold member, and a movable member capable of moving forward and backward into the second mold member. A molding die is prepared, which includes a sliding mold member having a back surface shape portion that forms the back surface shape of the uneven pattern of the RIM product. Next, with the mold clamped, the slide mold member was moved forward toward the first mold member so that the distance between it and the first mold member was narrower than the wall thickness of the uneven pattern of the RIM product. In this state, the RIM raw material is injected into the cavity of the mold.
その後、上記スライド型部材を第１型部材との間隔がＲ
ＩＭ製品の凹凸模様の肉厚寸法に相当するよう後退移動
させることにより、凹凸模様を有するＲＩＭ製品を成形
するようにする。After that, the distance between the slide mold member and the first mold member is set to R.
By moving backward to correspond to the wall thickness of the uneven pattern of the IM product, a RIM product having an uneven pattern is molded.
（作用）
上記の構成により、本発明方法では、ＲＩＭ製品の凹凸
模様の表面形状を形作る表面形状部を−Ｈする第１型部
材と、該第１型部材に対向して配置された第２型部材と
、該第２型部材に進退移動可能に設けられ、上記ＲＩＭ
製品の凹凸模様の裏面形状を形作る裏面形状部を有する
スライド型部材とを備えた成形型が型締めされた状態で
、かつ上記スライド型部材が第１型部材との間隔がＲＩ
Ｍ製品の凹凸模様の肉厚寸法よりも狭くなるよう第１型
部材側に前進移動させられた状態で、上記成形型のキャ
ビティ内にＲＩ Ｍ原料が射出され、その後、上記スラ
イド型部材が第１型部材との間隔がＲＩＭ製品の凹凸模
様の肉厚寸法に相当するよう後退移動させられることに
より、凹凸模様を有するＲ Ｉ Ｍ製品が成形される。(Function) With the above configuration, the method of the present invention includes a first mold member that -Hs the surface shape portion forming the uneven pattern surface shape of the RIM product, and a second mold member disposed opposite to the first mold member. a mold member, the second mold member is provided so as to be movable forward and backward;
When a mold including a slide mold member having a back surface shape part that forms the back surface shape of the uneven pattern of the product is clamped, and the distance between the slide mold member and the first mold member is RI.
The RI M raw material is injected into the cavity of the mold while being moved forward toward the first mold member so that it becomes narrower than the thickness dimension of the uneven pattern of the M product, and then the slide mold member is moved forward into the cavity of the mold. By moving backward so that the distance from the type 1 member corresponds to the wall thickness of the uneven pattern of the RIM product, an RIM product having an uneven pattern is molded.
このように、ＲＩＭ原料が成形型のキャビティ内に射出
される段階で、上記スライド型部材と第１型部材との間
隔がＲＩ Ｍ製品の凹凸模様の肉厚寸法よりも狭くなさ
れていることから、上記ＲＩＭ原料のキャビティ内での
流速が加速されて、該キャビティのコーナー側に溜まる
エアがＲＩＭ原料の流れに巻き込まれて取り除かれ、よ
って該ＲＩ Ｍ原料がキャビティ内の隅々にまで満遍無
く行き亘り、これにより凹凸模様に欠肉部のないＲｒＭ
製品が確実に成形されることとなる。In this way, at the stage when the RIM raw material is injected into the cavity of the mold, the distance between the slide mold member and the first mold member is made narrower than the thickness dimension of the uneven pattern of the RIM product. , the flow velocity of the RIM raw material inside the cavity is accelerated, and the air accumulated on the corner side of the cavity is caught up in the flow of the RIM raw material and removed, so that the RIM raw material is distributed evenly to every corner of the cavity. As a result, RrM has no missing parts in the uneven pattern.
The product will be molded reliably.
（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３図は本発明方法により成形されたＲＩＭ製品として
の自動車のスポイラ−Ａを示し、該スポイラ−Ａは、例
えばポリウレタン製の発泡品であって、その表面には、
アルファベットｒＡＢｃＪからなる凹凸模様ａ１．ａ１
．ａｌが一体的に形成されている。FIG. 3 shows an automobile spoiler A as a RIM product molded by the method of the present invention. The spoiler A is a foamed product made of, for example, polyurethane, and its surface has
An uneven pattern a1 consisting of the alphabet rABcJ. a1
．． al is integrally formed.
このスポイラ−Ａは、第１図（ａ）および第１図（ｂ）
に示すような成形型１を用いて成形されるが、その成形
要領を説明する前に上記成形型１の構成について説明す
ることとする。This spoiler-A is shown in Fig. 1(a) and Fig. 1(b).
The molding is performed using a mold 1 as shown in FIG. 1. Before explaining the molding procedure, the structure of the mold 1 will be explained.
上記成形型１は、同図に示すように、図示しない昇降装
置に昇降可能に支持された第１型部材としてのキャビテ
ィ型２を備えてなり、該キャビティ型２の下面には、上
記スポイラ−Ａの各凹凸模様ａ１の表面形状を形作る表
面形状部２ａが形成されている。また、上記キャビティ
型２の下方には、該キャビティ型２との間にスポイラ−
成形用のキャビティ３を構成する第２型部材としてのコ
ア型４が対向して配置され、該コア型４の上面側には、
下方に延びる複数本（図では２本のみ表われる）のロッ
ド５，５．・・・を有するスライド型部材６が上下方向
に進退移動可能に配置され、かつ該スライド型部材６の
上面には、上記スポイラ−Ａの各凹凸模様ａ１の裏面形
状を形作る裏面形状部６ａが形成されている。また、上
記スライド型部材６の裏面形状部６ａの凸部コーナー側
には、第２図に拡大詳示するように、上方に突出する先
端尖鋭部６ｂ、６ｂ、６ｂが形成されている。As shown in the figure, the mold 1 includes a cavity mold 2 as a first mold member that is supported by an elevating device (not shown) so as to be movable up and down. A surface shape portion 2a that forms the surface shape of each uneven pattern a1 of A is formed. Further, below the cavity mold 2, there is a spoiler between the cavity mold 2 and the cavity mold 2.
A core mold 4 as a second mold member constituting a molding cavity 3 is disposed facing each other, and on the upper surface side of the core mold 4,
A plurality of rods (only two are shown in the figure) extending downward, 5, 5. A slide type member 6 having... is disposed so as to be able to move forward and backward in the vertical direction, and on the upper surface of the slide type member 6, there is a back surface shaped part 6a that forms the back surface shape of each uneven pattern a1 of the spoiler-A. It is formed. Further, on the convex corner side of the back surface shaped portion 6a of the slide type member 6, upwardly protruding sharp tip portions 6b, 6b, 6b are formed, as shown in enlarged detail in FIG.
そして、該スライド型部材６は、第１図（ａ）に示すよ
うに、上記各ロッド５に縮装されたコイルスプリング７
のばね力によって常時上方に付勢されて前進（上昇）移
動せしめられ、この状態で、その裏面形状部６ａを上記
コア型４から突出させて上記キャビティ型２側に接近さ
せ、表面形状部２ａとの間隔がスポイラ−Ａの各凹凸模
様ａ１の肉厚寸法よりも狭くなるようになされている一
方、第１図（ｂ）に示すように、ＲＩＭ原料Ａ″が上記
キャビティ３内に射出されて発泡すると、該ＲＩＭ原料
Ａ′の発泡圧によって各コイルスプリング７のばね力に
抗して後退（下降）移動せしめられ、この状態で、スラ
イド型部材６外周に形成された係合段部６Ｃをコア型４
内周に形成された係合段部４ａに係合させてそれ以降の
後退動作を停止せしめ、上記表面形状部２ａとの間隔が
上記スポイラ−Ａの各凹凸模様ａ１の肉厚寸法に相当す
るようになされている。As shown in FIG. 1(a), the slide type member 6 includes a coil spring 7 compressed into each rod 5.
is always urged upward by the spring force to move it forward (upward), and in this state, the back surface shaped portion 6a is made to protrude from the core mold 4 and approach the cavity mold 2 side, and the surface shaped portion 2a is moved forward (raised). While the spacing between the spoiler A and the spoiler A is narrower than the wall thickness of each uneven pattern a1 of the spoiler A, as shown in FIG. 1(b), the RIM raw material A'' is injected into the cavity 3. When foaming occurs, the foaming pressure of the RIM raw material A' causes it to move backward (downward) against the spring force of each coil spring 7, and in this state, the engagement step 6C formed on the outer periphery of the slide type member 6 The core type 4
It engages with the engagement step portion 4a formed on the inner periphery to stop the subsequent backward movement, and the distance from the surface shape portion 2a corresponds to the wall thickness dimension of each uneven pattern a1 of the spoiler-A. It is done like this.
次に、上記成形型１を用いてスポイラ−Ａを成形する要
領を説明するに、まず、第１図（ａ）に示すように、成
形型１のキャビティ型２を昇降装置の下降作動により下
降させて上記成形型１を型締めする。この型締め状態で
、スライド型部材６は、複数本のコイルスプリング７．
７．・・・のばね力によって上方に付勢されて上記キャ
ビティ型２側に前進移動させられた状態で配置されてい
る。Next, to explain the procedure for molding the spoiler A using the mold 1, first, as shown in FIG. 1(a), the cavity mold 2 of the mold 1 is lowered by the lowering operation of the lifting device. Then, the mold 1 is clamped. In this mold clamped state, the slide mold member 6 has a plurality of coil springs 7.
7. It is disposed in such a manner that it is urged upward by the spring force of . . . and moved forward toward the cavity mold 2 side.
これにより、上記スライド型部材６の裏面形状部６ａと
キャビティ型２の表面形状部２ａとの間隔が、第２図実
線にて示すように、上記スポイラ−Ａの凹凸模様ａ１の
肉厚寸法よりも狭くなされている。As a result, the distance between the back surface shape portion 6a of the slide mold member 6 and the surface shape portion 2a of the cavity mold 2 is smaller than the thickness dimension of the uneven pattern a1 of the spoiler A, as shown by the solid line in FIG. It is also very narrow.
次いで、上記成形型１のキャビティ３内にＲＩＭ原料Ａ
゛を矢印方向から射出する。この際、上記上記スライド
型部材６の裏面形状部６ａとキャビティ型２の表面形状
部２ａとの間隔が上述の如く狭められていることから、
上記キャビティ３内に射出されてその内部を流動するＲ
ｉｆ原料原料流速が加速され、キャビティ３のコーナー
側に溜まるエアＢ、 Ｂ、・・・を上記ＲＩＭ原料Ａ
−の流れに巻き込んで取り除き得、これにより該ＲＩＭ
原料Ａ′をキャビティ内の隅々にまで溝層無く行き亘ら
せることかできる。また、スライド型部材６の各先端尖
鋭部６ｂによって上記キャビティ３のコーナー側に溜ま
るエアＢ、 Ｂ、・・・を速やかにかつ確実に取り除
くことができる。Next, the RIM raw material A is placed in the cavity 3 of the mold 1.
゛ is ejected from the direction of the arrow. At this time, since the distance between the back surface shape portion 6a of the slide mold member 6 and the surface shape portion 2a of the cavity mold 2 is narrowed as described above,
R injected into the cavity 3 and flowing inside it
If the flow rate of the raw material is accelerated, the air B, B, etc. that accumulates on the corner side of the cavity 3 is transferred to the RIM raw material A.
- can be removed by entrainment in the flow of the RIM.
The raw material A' can be spread to every corner within the cavity without a groove layer. Moreover, the air B, B, . . . accumulated on the corner side of the cavity 3 can be quickly and reliably removed by the sharp tip portions 6b of the slide type member 6.
その後、上記キャビティ３内に射出されたＲＩＭ原料Ａ
′が成形型１の型部によって発泡すると、この発泡圧に
よって上記スライド型部材６が、第１図（ｂ）に示すよ
うに、各コイルスプリング７のばね力に抗して下降移動
せしめられ、その係合段部６ｃをコア型４の係合段部４
ａに係合させてそれ以降の下降動作が停止せしめられる
。これにより、上記スライド型部材６の裏面形状部６ａ
とキャビティ型２の表面形状部２ａとの間隔が、第２図
仮想線にて示すように、上記スポイラ−Ａの各凹凸模様
ａ１の肉厚寸法に相当して確保される。After that, the RIM raw material A injected into the cavity 3
' is foamed by the mold part of the mold 1, the foaming pressure causes the slide mold member 6 to move downward against the spring force of each coil spring 7, as shown in FIG. 1(b). The engaging stepped portion 6c is connected to the engaging stepped portion 4 of the core mold 4.
a is engaged to stop the subsequent downward movement. As a result, the back surface shaped portion 6a of the slide type member 6
and the surface shape portion 2a of the cavity mold 2, as shown by the imaginary line in FIG.
そして、この状態で、上記ｒｚｒＭｒｆｉｔ料Ａ′の反
応硬化により、第３図に示す如きスポイラ−Ａを得、該
スポイラ−Ａに付着しているゲート部およびランナ一部
（第３図に仮想線にて示す）の樹脂を除去して製品とな
す。In this state, a spoiler A as shown in FIG. 3 is obtained by reaction hardening of the rzrMrfit material A', and a gate part and a part of the runner attached to the spoiler A (the imaginary line in FIG. 3) is obtained. The product is made by removing the resin (shown in ).
このように、本実施例では、ＲＩＭ原料Ａ′の射出段階
で、スライド型部材６の裏面形状部６ａとキャビティ型
２の表面形状部２ａとの間隔を狭めることにより、キャ
ビティ３内を流動するＲＩＭ原料Ａ″の流速を加速し、
これによりキャビティ３内のコーナー側へのエア溜りを
なくしていることから、各凹凸模様ａ１に欠肉部のない
スポイラ−Ａを確実に成形することができる。As described above, in this embodiment, at the injection stage of the RIM raw material A', by narrowing the distance between the back surface shape part 6a of the slide mold member 6 and the surface shape part 2a of the cavity mold 2, the RIM raw material A' flows inside the cavity 3. Accelerate the flow rate of RIM raw material A'',
This eliminates air pockets toward the corners in the cavity 3, so that the spoiler A can be reliably molded without missing parts in each uneven pattern a1.
なお、上記実施例では、ＲＩＭ原料Ａ′Ａ′出段階でス
ライド型部材６を複数本のコイルスプリング７．７．・
・・のばね力によってキャビティ型２側に突出させるこ
とにより、キャビティ３の隙間（キャビティ型２の表面
形状部２ａとスライド型部材６の裏面形状部６ａとの間
隔）を狭める一方、上記ＲＩＭ原料八゛へ射出後にその
発泡圧によって上記スライド型部材６を上記各コイルス
プリング７のばね力に抗して後退移動させることにより
、上記キャビティ３の間隔をスポイラ−Ａの各凹凸模様
ａ１の肉厚寸法に相当して拡げるようにしたが、これに
限らず、例えばＲＩＭ製品が発泡品でない場合には、流
体圧シリンダやリンク機構等の昇降手段によって上記ス
ライド型部材６を進退移動させるようにすることも採用
可能である。In the above embodiment, the slide type member 6 is connected to the plurality of coil springs 7, 7, .・
By protruding toward the cavity mold 2 side by the spring force of ..., the gap in the cavity 3 (the distance between the surface shape part 2a of the cavity mold 2 and the back surface shape part 6a of the slide mold member 6) is narrowed. After injecting into the 8th layer, the sliding member 6 is moved backward by the foaming pressure against the spring force of the coil springs 7, so that the distance between the cavities 3 is adjusted to the thickness of each uneven pattern a1 of the spoiler-A. Although the RIM product is expanded according to the dimensions, the present invention is not limited to this. For example, if the RIM product is not a foamed product, the sliding member 6 may be moved forward and backward by a lifting means such as a fluid pressure cylinder or a link mechanism. This can also be adopted.
また、上記実施例では、ＲＩＭ製品が自動車のスポイラ
−Ａである場合を示したが、他の車体構成部材や内装品
、あるいは自動車以外の産業分野に用いられるＲＩＭ製
品にも適用可能なことは勿論である。Furthermore, in the above example, the case where the RIM product is an automobile spoiler-A is shown, but it is possible to apply it to other car body components, interior parts, or RIM products used in industrial fields other than automobiles. Of course.
（発明の効果）
以上説明したように、本発明方法によれば、ＲＩＭ製品
の凹凸模様の表面形状を形作る表面形状部を有する第１
型部材と、該第１型部材に対向して配置された第２型部
材に移動可能に設けられ、上記ＲＩＭ製品の凹凸模様の
裏面形状を形作る裏面形状部を有するスライド型部材と
の間隔を、ＲＩＭ製品の凹凸模様の肉厚寸法よりも狭め
た状態で、成形型のキャビティ内にＲＩＭ原料を射出し
、その後、上記スライド型部材と第１型部材との間隔を
ＲＩＭ製品の凹凸模様の肉厚寸法に相当するよう拡げる
ようにするので、上記ＲＩＭ原料がキャビティ内の隅々
にまで溝層無く行き亘って、凹凸模様に欠肉部のないＲ
ＩＭ製品を確実に成形することができる。(Effects of the Invention) As explained above, according to the method of the present invention, the first
The distance between the mold member and a slide mold member, which is movably provided on a second mold member disposed opposite to the first mold member, and has a back surface shape part that forms the back surface shape of the uneven pattern of the RIM product is determined. , the RIM raw material is injected into the cavity of the mold in a state that is narrower than the wall thickness of the uneven pattern of the RIM product, and then the distance between the slide mold member and the first mold member is adjusted to the thickness of the uneven pattern of the RIM product. Since the RIM material is spread to correspond to the wall thickness, the RIM raw material is spread to every corner of the cavity without a groove layer, and the RIM material is spread out to correspond to the wall thickness.
IM products can be reliably molded.
図面は本発明の実施例を示し、第１図（ａ）はＲＩＭ原
料射出前の型締め状態における成形型の縦断面図、第１
図（ｂ）はＲＩＭ原料の発泡によりスライド型部材が下
降せしめられた状態における成形型の縦断面図、第２図
はキャビティ内にＲＩＭ原料を射出した状態を示す成形
型の要部拡大縦断面図、第３図はスポイラ−の斜視図で
ある。
第４図および第５図は従来例を示し、第４図はエア溜り
が生じた状態を示す第２図相当図、第５図は凹凸模様に
欠肉部が発生した状態を示すＲＩＭ製品の要部拡大図で
ある。
１・・・成形型、２・・・キャビティ型（第１型部材）
、２ａ・・・表面形状部、３・・・キャビティ、４・・
・コア型（第２型部材）、６・・・スライド型部材、６
ａ・・・裏面形状部、Ａ・・・スポイラ−（ＲＩＭ製品
）、ａｌ・・・凹凸模様、Ａ′・・・ＲＩ Ｍ原料。
−７ε
＝７９−
第
図
第４
図The drawings show an embodiment of the present invention, and FIG.
Figure (b) is a vertical cross-sectional view of the mold with the slide mold member lowered due to foaming of the RIM raw material, and Figure 2 is an enlarged vertical cross-section of the main part of the mold showing the state in which the RIM raw material is injected into the cavity. FIG. 3 is a perspective view of the spoiler. Figures 4 and 5 show conventional examples, Figure 4 is a diagram equivalent to Figure 2 showing a state where air pockets have occurred, and Figure 5 is a diagram of a RIM product showing a state where a lack of thickness has occurred in an uneven pattern. It is an enlarged view of the main part. 1... Molding mold, 2... Cavity mold (first mold member)
, 2a... Surface shape portion, 3... Cavity, 4...
・Core mold (second mold member), 6...Slide mold member, 6
a... Back surface shape part, A... Spoiler (RIM product), al... Uneven pattern, A'... RIM raw material. -7ε =79- Figure 4
Claims (1)
って、上記ＲＩＭ製品の凹凸模様の表面形状を形作る表
面形状部を有する第１型部材と、該第１型部材に対向し
て配置された第２型部材と、該第２型部材に進退移動可
能に設けられ、上記ＲＩＭ製品の凹凸模様の裏面形状を
形作る裏面形状部を有するスライド型部材とを備えた成
形型を用意し、次いで、上記成形型を型締めした状態で
、かつ上記スライド型部材を第１型部材との間隔がＲＩ
Ｍ製品の凹凸模様の肉厚寸法よりも狭くなるよう第１型
部材側に前進移動させた状態で、上記成形型のキャビテ
ィ内にＲＩＭ原料を射出し、その後、上記スライド型部
材を第１型部材との間隔がＲＩＭ製品の凹凸模様の肉厚
寸法に相当するよう後退移動させることにより、凹凸模
様を有するＲＩＭ製品を成形することを特徴とする凹凸
模様を有するＲＩＭ製品の成形方法。(1) A method for molding a RIM product having an uneven pattern, the method comprising: a first mold member having a surface shape portion forming the surface shape of the uneven pattern of the RIM product; and a first mold member disposed opposite to the first mold member. A molding die is prepared, which includes a second mold member, which is movable back and forth on the second mold member, and has a back surface shape portion that forms the back surface shape of the uneven pattern of the RIM product, and then , when the mold is clamped, and the distance between the slide mold member and the first mold member is RI.
The RIM raw material is injected into the cavity of the mold while moving it forward toward the first mold member so that it becomes narrower than the wall thickness of the uneven pattern of the M product, and then the slide mold member is moved into the first mold. A method for molding a RIM product having an uneven pattern, characterized in that the RIM product having an uneven pattern is molded by moving backward so that the distance between the RIM product and the member corresponds to the wall thickness of the uneven pattern of the RIM product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63294052A JPH02139211A (en) | 1988-11-21 | 1988-11-21 | Method of molding rim product having recessed and projected pattern |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63294052A JPH02139211A (en) | 1988-11-21 | 1988-11-21 | Method of molding rim product having recessed and projected pattern |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02139211A true JPH02139211A (en) | 1990-05-29 |
Family
ID=17802657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63294052A Pending JPH02139211A (en) | 1988-11-21 | 1988-11-21 | Method of molding rim product having recessed and projected pattern |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02139211A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0673746A1 (en) * | 1994-03-11 | 1995-09-27 | MASCHINENFABRIK HENNECKE GmbH | Method and apparatus for manufacturing moulded articles from multi-component plastic materials |
| KR100462700B1 (en) * | 1996-09-25 | 2006-03-30 | 미쓰비시 마테리알 가부시키가이샤 | Injection molding apparatus and injection molding method |
| WO2010004117A3 (en) * | 2008-07-01 | 2010-04-01 | Aplix | Injection-moulded article having a field of hooks obtained by moulding |
| US20140212538A1 (en) * | 2008-07-01 | 2014-07-31 | Aplix | Injection-moulded article comprising a field of hooks obtained by moulding |
| CN104999622A (en) * | 2015-06-29 | 2015-10-28 | 上海化工研究院 | Thermoplastic resin thick walled casting product mold system |
-
1988
- 1988-11-21 JP JP63294052A patent/JPH02139211A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0673746A1 (en) * | 1994-03-11 | 1995-09-27 | MASCHINENFABRIK HENNECKE GmbH | Method and apparatus for manufacturing moulded articles from multi-component plastic materials |
| KR100462700B1 (en) * | 1996-09-25 | 2006-03-30 | 미쓰비시 마테리알 가부시키가이샤 | Injection molding apparatus and injection molding method |
| WO2010004117A3 (en) * | 2008-07-01 | 2010-04-01 | Aplix | Injection-moulded article having a field of hooks obtained by moulding |
| JP2011526550A (en) * | 2008-07-01 | 2011-10-13 | アプリックス | Molded product having hook surface obtained by injection molding |
| US20140212538A1 (en) * | 2008-07-01 | 2014-07-31 | Aplix | Injection-moulded article comprising a field of hooks obtained by moulding |
| US9193104B2 (en) * | 2008-07-01 | 2015-11-24 | Aplix | Injection-moulded article comprising a field of hooks obtained by moulding |
| US9278469B2 (en) | 2008-07-01 | 2016-03-08 | Aplix | Injection-moulded article comprising a field of hooks obtained by moulding |
| US9937649B2 (en) * | 2008-07-01 | 2018-04-10 | Aplix | Injection-moulded article comprising a field of hooks obtained by moulding |
| CN104999622A (en) * | 2015-06-29 | 2015-10-28 | 上海化工研究院 | Thermoplastic resin thick walled casting product mold system |
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