JPH02102010A - Sticking molding method - Google Patents
Sticking molding methodInfo
- Publication number
- JPH02102010A JPH02102010A JP63253794A JP25379488A JPH02102010A JP H02102010 A JPH02102010 A JP H02102010A JP 63253794 A JP63253794 A JP 63253794A JP 25379488 A JP25379488 A JP 25379488A JP H02102010 A JPH02102010 A JP H02102010A
- Authority
- JP
- Japan
- Prior art keywords
- molten resin
- gate
- sheet material
- injected
- gates
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000000465 moulding Methods 0.000 title claims abstract description 8
- 239000011347 resin Substances 0.000 claims abstract description 91
- 229920005989 resin Polymers 0.000 claims abstract description 91
- 239000000463 material Substances 0.000 claims abstract description 85
- 230000037303 wrinkles Effects 0.000 abstract description 10
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer 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
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1671—Making multilayered or multicoloured articles with an insert
-
- 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
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
-
- 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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
-
- 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
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
- B29C2045/0032—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks sequential injection from multiple gates, e.g. to avoid weld lines
-
- 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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C2045/1486—Details, accessories and auxiliary operations
- B29C2045/14901—Coating a sheet-like insert smaller than the dimensions of the adjacent mould wall
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】 ［産業上の利用分野コ 本発明は射出成形における貼合成形方法に関する。[Detailed description of the invention] [Industrial application fields] The present invention relates to a bonding method in injection molding.
［従来の技術］
従来、第４図（ａ） 、 （ｂ）に示すように、複数
のゲート３１．３２が形成された上金型１、下金型２お
よび各ゲート３０．３２に備えられたゲート開閉バルブ
４１，４□とで構成された金型な用いて、全領域貼合成
形品を得る貼合成形方法においては、前記金型のキャビ
ティ５の全領域にあらかじめ布、ビニール、発泡プラス
チック製等のシート材１３Ｉを収納したのち、金型な型
閉じし、ゲート開閉バルブ４０，４□を同時に開いて、
ゲート３０，３２から溶融樹脂１２．１４をキャビティ
５内に射出する方法が用いられている。[Prior Art] Conventionally, as shown in FIGS. 4(a) and 4(b), an upper mold 1, a lower mold 2, and each gate 30, 32 having a plurality of gates 31, 32 are provided. In the bonding molding method for obtaining a full-area bonded molded product using a mold consisting of gate opening/closing valves 41 and 4□, the entire area of the cavity 5 of the mold is coated with cloth, vinyl, foam, After storing the sheet material 13I made of plastic or the like, close the mold, open the gate opening/closing valves 40, 4□ at the same time,
A method is used in which the molten resin 12, 14 is injected into the cavity 5 through the gates 30, 32.
また、第５図（ａ） 、 （ｂ）に示すように、第４
図（ａ） 、 （ｂ）に示した金型と同じ金型を用いて
、−部領域貼合成形品を得る貼合成形方法においては、
前記金型のキャビティ５にキャビティ５の面積より小面
積のシート材＋３２を収納したのち、金型を型閉じし、
ゲート開閉バルブ４３．４□を同時に開いて、ゲート３
．．３２から溶融樹脂１５゜１６をキャビティ５内に射
出する成形方法が用いられている。In addition, as shown in Figures 5(a) and (b), the fourth
In the pasting molding method for obtaining a - region pasted molded product using the same mold as shown in Figures (a) and (b),
After storing a sheet material +32 having an area smaller than the area of the cavity 5 in the cavity 5 of the mold, the mold is closed,
Open gate opening/closing valve 43.4□ at the same time and open gate 3.
．． ．． A molding method is used in which molten resin 15° 16 is injected from 32 into the cavity 5.
［発明が解決しようとする課題］
第４図（ａ） 、 （ｂ）に示す全領域貼合成形品の成
形方法においては、各ゲート３８．３２から溶融樹脂１
２．１４を同時に射出するものであり、このため、ゲー
ト３．から射出された溶融樹脂１２の流展方向とゲート
３２から射出された溶融樹脂１４の流展方向が異なって
、シート材１３Ｉが溶融樹脂＋２゜１４の異なる流展方
向にそれぞれ押し伸ばされることから、溶融樹脂１２．
１４の先端１２． 、１４１が互いに合体する部分に対
応するシート材１３．にしわが発生するという問題点が
ある。[Problems to be Solved by the Invention] In the method for molding the full-area bonded molded product shown in FIGS. 4(a) and 4(b), the molten resin 1 is
2.14 are injected at the same time, and therefore gates 3. This is because the flow direction of the molten resin 12 injected from the gate 32 and the flow direction of the molten resin 14 injected from the gate 32 are different, and the sheet material 13I is stretched in different flow directions of the molten resin +2°14. , molten resin 12.
14 tips 12. , 141 are combined with each other. There is a problem that wrinkles occur.
また、第５図（ａ） 、 （ｂ）に示す一部領域貼合成
形品の成形方法においても、各ゲート３８．３２から溶
融樹脂１５．１６を同時に射出するものであり、このた
め、溶融樹脂１５．１６がシート材１３２上で合体し、
特に、溶融樹脂１５．１６の先端１５．。Furthermore, in the method of forming the partially bonded molded product shown in FIGS. 5(a) and 5(b), the molten resin 15.16 is simultaneously injected from each gate 38.32. The resins 15 and 16 are combined on the sheet material 132,
In particular, the tip 15. of the molten resin 15.16. .
１６＋がシート材１３２の左端部で互いに合体した場合
、シート材１３２の左端部にしわが発生したり、また溶
融樹脂１６がシート材１３２の表面、下金型２間に流れ
込み、シート材１３２の左端部がまくれあがるという問
題点がある。16+ are combined with each other at the left end of the sheet material 132, wrinkles may occur at the left end of the sheet material 132, and the molten resin 16 may flow into the surface of the sheet material 132 and between the lower mold 2, causing the left end of the sheet material 132 to become wrinkled. There is a problem that the department is bulging up.
本発明は、上記従来の技術の問題点に鑑みてなされたも
のであり、全領域貼合わせ、一部領域貼合わせにかかわ
らず、シート材にしわが発生せず、またシート材がまく
れあがることのない、歩留りのすぐれた貼合成形方法を
提供することを目的としている。The present invention has been made in view of the above-mentioned problems of the conventional technology, and it is possible to prevent wrinkles from occurring in the sheet material and to prevent the sheet material from curling up, regardless of whether the entire area is laminated or a partial area is laminated. The purpose of the present invention is to provide a bonding method with an excellent yield.
［課題を解決するための手段］
上記目的を達成するために本発明においては、複数のゲ
ートが形成された金型のキャビティの全領域にあらかじ
めシート材を収納したのち、型閉じし、前記複数のゲー
トから溶融樹脂をキャビティ内に射出して、前記シート
材を前記溶融樹脂に貼合わせて、成形品を得る貼合成形
方法において、第１のゲートから溶融樹脂を射出し、該
溶融樹脂の流れの先端が第２のゲートに対向する前記シ
ート材の部分に流展する直前あるいは流展後に、第２の
ゲートから溶融樹脂を射出する。[Means for Solving the Problems] In order to achieve the above object, in the present invention, a sheet material is stored in advance in the entire area of a cavity of a mold in which a plurality of gates are formed, the mold is closed, and the plurality of gates are closed. In a bonding forming method in which a molded product is obtained by injecting a molten resin into a cavity from a first gate and laminating the sheet material to the molten resin, the molten resin is injected from a first gate and the molten resin is laminated to the cavity. The molten resin is injected from the second gate immediately before or after the leading edge of the flow spreads onto the portion of the sheet material facing the second gate.
また、複数のゲートが形成された金型のキャビティにあ
らかじめキャビティの面積より小面積のシート材を収納
したのち、型閉じし、前記複数のゲートから溶融樹脂を
キャビティ内に射出して、前記シート材を前記溶融樹脂
に貼合わせて、′成形品を得る貼合成形方法におい°て
、前記シート材に対応する第１のゲートから溶融樹脂を
射出し、該溶融樹脂の流れの先端が前記シート材の端に
流展後に、前記第１のゲート以外の第２のゲートから溶
融樹脂を射出する。Further, after storing a sheet material having an area smaller than the area of the cavity in advance in the cavity of a mold in which a plurality of gates are formed, the mold is closed, and molten resin is injected into the cavity from the plurality of gates, and the sheet material is In the bonding method for obtaining a molded product by laminating a material to the molten resin, the molten resin is injected from a first gate corresponding to the sheet material, and the tip of the flow of the molten resin is directed to the sheet material. After spreading the molten resin to the edge of the material, the molten resin is injected from a second gate other than the first gate.
そして、あらかじめキャビティの面積よりも小面積のシ
ート材を、流路面積が異なる複数のゲートが形成された
金型の前記キャビティ内であって、流路面積が大きい方
の第１のゲートに対応する部分に収納したのち、型閉じ
し、ついで、ほぼ同時に複数のゲートからそれぞれ溶融
樹脂を射出して、前記シート材を前記複数のゲートから
射出された溶融樹脂に貼合わせて、成形品を得る。Then, in advance, a sheet material having an area smaller than the area of the cavity is placed in the cavity of the mold in which multiple gates with different flow path areas are formed, and corresponds to the first gate with the larger flow path area. Then, the mold is closed, and the molten resin is injected almost simultaneously from each of the plurality of gates, and the sheet material is bonded to the molten resin injected from the plurality of gates to obtain a molded product. .
［作 用］
本発明において、キャビティの全領域にシート材を収納
して、全領域貼合成形品を得る場合には、第１のゲート
から射出された溶融樹脂により第１．第２のゲート間の
シート材が前記溶融樹脂の流展方向にのみ押し伸ばされ
、そして、第２のゲートから射出された溶融樹脂は、直
ちに第１のゲートから射出された溶融樹脂の先端部と合
体し、第１のゲート方向へ流展しないことにより、第１
．第２のゲートから射出された溶融樹脂の流展方向が同
一となるので、シート材の押し伸ばされる方向も同一と
なる。[Function] In the present invention, when a sheet material is housed in the entire region of the cavity to obtain a molded product bonded over the entire region, the molten resin injected from the first gate is used to fill the first gate. The sheet material between the second gates is stretched only in the flow direction of the molten resin, and the molten resin injected from the second gate immediately reaches the tip of the molten resin injected from the first gate. By combining with the first gate and not flowing toward the first gate, the first
．． Since the flow direction of the molten resin injected from the second gate is the same, the direction in which the sheet material is stretched is also the same.
また、キャビティに該キャビティの面積より小面積のシ
ート材を収納して、一部領域貼合成形品を得る場合には
、第１のゲートから射出された溶融樹脂によりシート材
が前記溶融樹脂の流展方向にのみ押し伸ばされ、そして
、第２のゲートから射出された溶融樹脂は、第１のゲー
トから射出され、第１．第２のゲート間のシート材の端
を越えた溶融樹脂の先端部と合体して、第１のゲート方
向への流展が止められる。In addition, when a sheet material having an area smaller than the area of the cavity is stored in the cavity to obtain a partially bonded molded product, the sheet material is made of the molten resin by the molten resin injected from the first gate. The molten resin is stretched only in the flow direction and injected from the second gate, and is injected from the first gate. The molten resin is combined with the leading end of the molten resin that has passed over the edge of the sheet material between the second gates, and its flow toward the first gate is stopped.
そして、キャビティに該キャビティの面積より小面積の
シート材を収納して、一部領域貼合成形品を得る場合に
は、第１のゲートから射出される単位時間当たりの溶融
樹脂量が第２のゲートから射出される溶融樹脂量よりも
大きいことにより、第２のゲートから射出された溶融樹
脂は、第１゜第２のゲート間のシート材の端に達する前
に、第１のゲートから射出された溶融樹脂により第１の
ゲート方向への流展が止められて、シート材が第１のゲ
ートから射出された溶融樹脂の流展方向にのみ押し伸ば
される。When a sheet material having an area smaller than the area of the cavity is stored in the cavity to obtain a partially bonded molded product, the amount of molten resin injected from the first gate per unit time is the same as that of the second gate. Since the amount of molten resin injected from the second gate is larger than the amount of molten resin injected from the first gate, the amount of molten resin injected from the second gate is The flow of the injected molten resin in the direction of the first gate is stopped, and the sheet material is stretched only in the direction of flow of the molten resin injected from the first gate.
［実施例］
次に、本発明の実施例について図面を参照して説明する
。[Example] Next, an example of the present invention will be described with reference to the drawings.
第１図（ａ） 、 （ｂ）に示すように、キャビティ
５の全領域にシート材６１を収納して、まず、ゲート３
１のゲート開閉バルブ４１のみを開いて、ゲート３．か
ら射出された溶融樹脂７の先端７１がゲート３２に対向
するシート材６１の部分に流展する直前に、ゲート３２
のゲート開閉バルブ４□を開く。As shown in FIGS. 1(a) and 1(b), the sheet material 61 is stored in the entire area of the cavity 5, and the gate 3 is first filled with the sheet material 61.
Open only the gate opening/closing valve 41 of gate 3. Immediately before the tip 71 of the molten resin 7 injected from the gate 32 flows onto the portion of the sheet material 61 facing the gate 32,
Open the gate opening/closing valve 4□.
これにより、ゲート３Ｉから射出された溶融樹脂７．に
よりゲート３１．３２間のシート材６Ｉが溶融樹脂７の
流展方向にのみ押し伸ばされ、そして、ゲート３２から
射出された溶融樹脂は、直ちに溶融樹脂７の先端部と合
体し、ゲート３．方向へ流展しないことによりゲート３
１．３２から射出された溶融樹脂の流展方向が同一とな
るので、シート材６３の押し伸ばされる方向も同一とな
り、シート材６Ｉにしわが発生しない。As a result, the molten resin 7. injected from the gate 3I. As a result, the sheet material 6I between the gates 31 and 32 is stretched only in the flow direction of the molten resin 7, and the molten resin injected from the gate 32 immediately merges with the tip of the molten resin 7, and the sheet material 6I between the gates 31 and 32 is stretched out only in the direction in which the molten resin 7 flows. Gate 3 by not flowing in the direction
Since the flow direction of the molten resin injected from 1.32 is the same, the direction in which the sheet material 63 is pushed and stretched is also the same, and no wrinkles occur in the sheet material 6I.
なお、本実施例では、溶融樹脂７の先端７、がゲート３
２に対向するシート材６Ｉの部分に流展する直前に、ゲ
ート３２のゲート開閉バルブ４□を開いたが、先端７１
がゲート３２に対向するシート材６１の部分に流展後に
、ゲート３２のゲート開閉バルブ４□を開いてもよい。In this embodiment, the tip 7 of the molten resin 7 is connected to the gate 3.
2, the gate opening/closing valve 4□ of the gate 32 was opened, but the tip 71
After the liquid is spread on the portion of the sheet material 61 facing the gate 32, the gate opening/closing valve 4□ of the gate 32 may be opened.
また、第２図（ａ） 、 （ｂ）に示すように、キャ
ビティ５にキャビティ５の面積よりも小面積のシート材
６３を収納して、一部領域貼合成形品を得る場合、まず
、シート材６３に対応するゲート３１のゲート開閉バル
ブ４Ｉのみを開いて、ゲート３２から射出された溶融樹
脂８の先端８．がゲート３．．３２間のシート材６２の
左端に流展後に、ゲート３２のゲート開閉バルブ４２を
開く。Further, as shown in FIGS. 2(a) and 2(b), when a sheet material 63 having an area smaller than the area of the cavity 5 is stored in the cavity 5 to obtain a partially bonded molded product, first, Only the gate opening/closing valve 4I of the gate 31 corresponding to the sheet material 63 is opened, and the tip 8. of the molten resin 8 injected from the gate 32 is opened. is gate 3. ．． After spreading the sheet material 62 between the spaces 32 and 32 to the left end, the gate opening/closing valve 42 of the gate 32 is opened.
これにより、ゲート３、から射出された溶融樹脂７によ
りシート材６３が溶融樹脂７の流展方向にのみ押し伸ば
され、そして、ゲート３２から射出された溶融樹脂は、
シート材６３の左端を越えた溶融樹脂７の先端７Ｉと合
体して、ゲート３１方向への流展が止められるので、シ
ート材６３にしわが発生せず、ゲート３２から射出され
た溶融樹脂がシート材６３の表面、下金型２間に流れ込
まず、シート材６３がまくれあがらない。As a result, the sheet material 63 is stretched by the molten resin 7 injected from the gate 3 only in the flow direction of the molten resin 7, and the molten resin injected from the gate 32 is
The molten resin 7 that has passed beyond the left end of the sheet material 63 is combined with the tip 7I and is stopped from flowing in the direction of the gate 31, so that wrinkles do not occur in the sheet material 63 and the molten resin injected from the gate 32 flows into the sheet. The sheet material 63 does not flow into the space between the surface of the material 63 and the lower mold 2, and the sheet material 63 does not roll up.
なお、本実施例では、溶融樹脂８の先端８１がゲート３
．．３２間のシート材６２の左端に流展後に、ゲート３
２のゲート開閉バルブ４□を開いたが、シート材６３の
前記左端とゲート３２との距離がシート材６３の前記左
端とゲート３Ｉとの距離に比べて大きい場合、溶融樹脂
８の先端８゜がシート材６３の前記左端に流展する直前
に、ゲート３２のゲート開閉バルブ４□を開いて、各ゲ
ート３１．３２から射出された溶融樹脂がシート材６３
上で合体しないようにしてもよい。In this embodiment, the tip 81 of the molten resin 8 is connected to the gate 3.
．． ．． After flowing the sheet material 62 between the gates 3 and 32, the gate 3
2, but if the distance between the left end of the sheet material 63 and the gate 32 is larger than the distance between the left end of the sheet material 63 and the gate 3I, the tip of the molten resin 8 8° Immediately before the resin flows to the left end of the sheet material 63, the gate opening/closing valve 4□ of the gate 32 is opened, and the molten resin injected from each gate 31, 32 flows onto the sheet material 63.
You may choose not to combine them at the top.
そして、第３図（ａ） 、 （ｂ）に示すように、ゲ
ート開閉バルブが備えられず、ゲート３１の流路面積が
ゲート３２の流路面積よりも大きい金型を用いて、一部
領域貼合成形品を得る場合、あらかじめキャビティ５の
面積よりも小面積のシート材６３を、金型の前記キャビ
ティ５内であって、流路面積が大きい方のゲート３１に
対応する部分に収納したのち、金型を型閉じし、ついで
、ほぼ同時にゲー１−３．，３２からそれぞれ溶融樹脂
１０゜１１を射出して前記シート材６３を溶融樹脂１０
．１１に貼合わせる。Then, as shown in FIGS. 3(a) and 3(b), a mold is used that is not equipped with a gate opening/closing valve and the flow passage area of the gate 31 is larger than that of the gate 32. When obtaining a bonded molded product, a sheet material 63 having an area smaller than the area of the cavity 5 is stored in advance in a portion of the mold that corresponds to the gate 31 having a larger flow path area within the cavity 5. Afterwards, the mold is closed, and then, almost simultaneously, games 1-3 are set. , 32 respectively inject molten resin 10° 11 to form the sheet material 63 into molten resin 10.
．． Attach to 11.
これにより、シート材６３に対応するゲート３１から射
出される単位時間当たりの溶融樹脂量がゲート３２のそ
れよりも大きいので、ゲート３２から射出された溶融樹
脂１１の先端１１□は、ゲート３１．３２間のシート材
６３の左端に達する前に、ゲート３１から射出された溶
融樹脂ｌＯの先端１ｔＬ と合体することにより、シー
ト材６３がゲート３１から射出された溶融樹脂１０の流
展方向にのみ押し伸ばされて、シート材６３にしわが発
生せず、溶融樹脂１１がシート材６３の表面、下金型２
間に流れ込まず、シート材６３がまくれあがらない。As a result, since the amount of molten resin per unit time injected from the gate 31 corresponding to the sheet material 63 is larger than that of the gate 32, the tip 11□ of the molten resin 11 injected from the gate 32 is injected from the gate 31. Before reaching the left end of the sheet material 63 between the gates 32 and 32, the sheet material 63 merges with the tip 1tL of the molten resin 10 injected from the gate 31, so that the sheet material 63 flows only in the flow direction of the molten resin 10 injected from the gate 31. As the sheet material 63 is stretched, no wrinkles occur, and the molten resin 11 covers the surface of the sheet material 63 and the lower mold 2.
The sheet material 63 does not flow into the gap, and the sheet material 63 does not roll up.
なお、上記実施例では、金型は上金型に２つのゲート３
３．３２が形成されているが、これに限られず、３つ以
上のゲートが形成されていてもよい。そして、必ずしも
金型にゲート開閉バルブが備えられていなくてもよく、
ゲート開閉バルブ４１．４２の開閉を制御する代わりに
、ゲート３、．３２に連通するランナの通路を開閉する
バルブビン、ピストンからなる手段（公知）を制御して
もよい。In addition, in the above embodiment, the mold has two gates 3 in the upper mold.
Although 3.32 gates are formed, the present invention is not limited to this, and three or more gates may be formed. Furthermore, the mold does not necessarily have to be equipped with a gate opening/closing valve.
Instead of controlling the opening and closing of the gate opening/closing valves 41, 42, the gates 3, . Means (known in the art) consisting of a valve pin and a piston for opening and closing the passage of the runner communicating with 32 may be controlled.
［発明の効果］
本発明は、以上説明したように構成されているので、以
下に記載する効果を奏する。[Effects of the Invention] Since the present invention is configured as described above, it produces the effects described below.
請求項１記載の発明においては、全領域貼合成形品の貼
合成形方法では、第１．第２のゲートから射出された溶
融樹脂の流展方向が同一となるので、シート材の押し伸
ばされる方向も同一となって、シート材にしわが発生せ
ず、良好な成形品を成形でき、製品の歩留りが向上する
。In the invention according to claim 1, in the method for bonding a full-area bonded molded article, the first step is as follows. Since the flow direction of the molten resin injected from the second gate is the same, the direction in which the sheet material is pushed and stretched is also the same, so that wrinkles do not occur in the sheet material, and good molded products can be formed. The yield is improved.
請求項２．３記載の発明においては、一部領域貼合成形
品の貼合成形品成形方法では、シート材が第１のゲート
から射出された溶融樹脂の流展方向にのみ押し伸ばされ
、第２のゲートから射出された溶融樹脂は第１のゲート
方向への流展が止められるので、シート材にしわが発生
せず、かつシート材、下金型間に第２のゲートから射出
された溶融樹脂が流れ込まず、シート材がまくれあがら
ないので、良好な成形品を成形でき、製品の歩留りが向
上する。In the invention described in claim 2.3, in the method for forming a partially bonded molded product, the sheet material is stretched only in the flow direction of the molten resin injected from the first gate, Since the molten resin injected from the second gate is stopped from spreading in the direction of the first gate, wrinkles do not occur on the sheet material, and the molten resin is injected from the second gate between the sheet material and the lower mold. Since the molten resin does not flow in and the sheet material does not curl up, good molded products can be molded and the product yield improves.
第１図（ａ）は本発明の貼合成形方法の第１の実施例で
、全領域貼合わせを説明するための金型の断面図、第１
図（ｂ）は第１図（ａ）におけるＡ−Ａ線断面図、第２
図（ａ）は本発明の貼合成形方法の第２の実施例で、一
部領域貼合わせを説明するための金型の断面図、第２図
（ｂ）は第２図（ａ）におけるＢ−Ｂ線断面図、第３図
（ａ）は本発明の第３の実施例で、一部領域貼合わせを
説明するための金型の断面図、第３図（ｂ）は第３図（
ａ）におけるＣ−Ｃ線断面図、第４図（ａ）は従来例で
、全領域貼合わせを説明するための金型の断面図、第４
図（ｂ）は第４図（ａ）におけるＤ−Ｄ線断面図、第５
図（ａ）は従来例で、一部領域貼合わせを説明するため
の金型の断面図、第５図（ｂ）は第５図（ａ）における
Ｅ−Ｅ線断面図である。
■・・・上金型、
２・・・下金型、
３９．３２・・・ゲート、
４□、４□・・・ゲート開閉バルブ、
５・・・キャビデイ、
６１．６３、６３・・・シート材、
７、８．１０． Ｉｔ・・・溶融樹脂、１０＋
１１゜
・・・先端。FIG. 1(a) shows a first embodiment of the bonding forming method of the present invention;
Figure (b) is a sectional view taken along line A-A in Figure 1 (a),
FIG. 2(a) is a second embodiment of the bonding method of the present invention, and is a cross-sectional view of a mold for explaining bonding of a partial area, and FIG. 2(b) is a cross-sectional view of the mold shown in FIG. 2(a). A cross-sectional view taken along the line B-B, and FIG. 3(a) is a cross-sectional view of a mold for explaining the bonding of a partial area in a third embodiment of the present invention, and FIG. 3(b) is a cross-sectional view of a mold shown in FIG. (
Figure 4 (a) is a conventional example, and Figure 4 (a) is a cross-sectional view of the mold for explaining full-area bonding.
Figure (b) is a sectional view taken along the line D-D in Figure 4 (a), and
FIG. 5(a) shows a conventional example, and is a cross-sectional view of a mold for explaining partial area bonding, and FIG. 5(b) is a cross-sectional view taken along the line E--E in FIG. 5(a). ■... Upper mold, 2... Lower mold, 39.32... Gate, 4□, 4□... Gate opening/closing valve, 5... Cavity, 61.63, 63... Sheet material, 7, 8.10. It... Molten resin, 10+11°...Tip.
Claims (3)
型のキャビティ（５）の全領域にあらかじめシート材（
６＿１）を収納したのち、型閉じし、前記複数のゲート
（３＿１、３＿２）から溶融樹脂をキャビティ（５）内
に射出して、前記シート材（６＿１）を前記溶融樹脂に
貼合わせて、成形品を得る貼合成形方法において、 第１のゲート（３＿１）から溶融樹脂（７）を射出し、
該溶融樹脂（７）の流れの先端（７＿１）が第２のゲー
ト（３＿２）に対向する前記シート材（６＿１）の部分
に流展する直前あるいは流展後に、第２のゲート（３２
）から溶融樹脂を射出することを特徴とする貼合成形方
法。(1) The sheet material (
6_1), the mold is closed, the molten resin is injected into the cavity (5) from the plurality of gates (3_1, 3_2), the sheet material (6_1) is bonded to the molten resin, and the molding is performed. In the pasting molding method for obtaining the product, molten resin (7) is injected from the first gate (3_1),
Immediately before or after the tip (7_1) of the flow of the molten resin (7) spreads to the part of the sheet material (6_1) facing the second gate (3_2), the second gate (32
) A bonding method characterized by injecting molten resin from a material.
型のキャビティ（５）にあらかじめキャビティ（５）の
面積より小面積のシート材（６３）を収納したのち、型
閉じし、前記複数のゲート（３＿１、３＿２）から溶融
樹脂をキャビティ（５）内に射出して、前記シート材（
６０）を前記溶融樹脂に貼合わせて、成形品を得る貼合
成形方法において、 前記シート材（６＿２）に対応する第１のゲート（３＿
１）から溶融樹脂（８）を射出し、該溶融樹脂（８）の
流れの先端（８＿１）が前記シート材（６＿２）の端に
流展後に、前記第１のゲート（３＿１）以外の第２のゲ
ート（３＿２）から溶融樹脂を射出することを特徴とす
る貼合成形方法。(2) After storing a sheet material (63) having an area smaller than the area of the cavity (5) in advance in the cavity (5) of the mold in which a plurality of gates (3_1, 3_2) are formed, the mold is closed and the plurality of gates (3_1, 3_2) are formed. The molten resin is injected into the cavity (5) from the gates (3_1, 3_2) of the sheet material (
60) to the molten resin to obtain a molded product, the first gate (3_2) corresponding to the sheet material (6_2)
The molten resin (8) is injected from 1), and after the tip (8_1) of the flow of the molten resin (8) is spread on the edge of the sheet material (6_2), A bonding forming method characterized by injecting molten resin from the gate (3_2) of No. 2.
のシート材（６３）を、流路面積が異なる複数のゲート
（３＿１、３＿２）が形成された金型の前記キャビティ
（５）内であって、流路面積が大きい方の第１のゲート
（３＿１）に対応する部分に収納したのち、型閉じし、
ついで、ほぼ同時に複数のゲート（３＿１、３＿２）か
らそれぞれ溶融樹脂（１０、１１）を射出して前記シー
ト材（６＿３）を前記複数のゲート（３＿１、３＿２）
から射出された溶融樹脂（１０、１１）に貼合わせて、
成形品を得る貼合成形方法。(3) A sheet material (63) having an area smaller than the area of the cavity (5) is placed in advance in the cavity (5) of the mold in which a plurality of gates (3_1, 3_2) with different flow path areas are formed. After storing it in the part corresponding to the first gate (3_1) with a larger flow path area, the mold is closed,
Then, almost simultaneously, the molten resin (10, 11) is injected from the plurality of gates (3_1, 3_2), respectively, to transfer the sheet material (6_3) to the plurality of gates (3_1, 3_2).
It is pasted onto the molten resin (10, 11) injected from
A bonding method for obtaining molded products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63253794A JPH02102010A (en) | 1988-10-11 | 1988-10-11 | Sticking molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63253794A JPH02102010A (en) | 1988-10-11 | 1988-10-11 | Sticking molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02102010A true JPH02102010A (en) | 1990-04-13 |
| JPH0542936B2 JPH0542936B2 (en) | 1993-06-30 |
Family
ID=17256242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63253794A Granted JPH02102010A (en) | 1988-10-11 | 1988-10-11 | Sticking molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02102010A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0676267A1 (en) * | 1994-04-04 | 1995-10-11 | Toyoda Gosei Co., Ltd. | Resin molding method |
| EP0704290A1 (en) * | 1994-09-01 | 1996-04-03 | Sumitomo Chemical Company Limited | Process for manufacturing thermoplastic resin moldings |
| EP0953423A1 (en) * | 1998-04-30 | 1999-11-03 | Compagnie Plastic Omnium | Method for producing a plastic part partially coated with a film, in particular decorative film |
| US6004498A (en) * | 1994-04-04 | 1999-12-21 | Toyoda Gosei Co. Ltd. | Method for molding resin to skin members |
| US6342176B2 (en) | 1997-12-25 | 2002-01-29 | Toyoda Gosei Co., Ltd. | Methods for molding resin-molded articles |
| EP1179404A1 (en) * | 2000-08-02 | 2002-02-13 | Ikuyo Co., Ltd | Apparatus for and method of injection-molding a body of synthetic resin |
| EP2033759A1 (en) * | 2007-09-07 | 2009-03-11 | Peguform Gmbh | Method for manufacturing a moulded part with different decorative areas |
| US8227070B2 (en) | 2009-12-25 | 2012-07-24 | Panasonic Corporation | Decorative member |
| US8415001B2 (en) | 2009-12-25 | 2013-04-09 | Panasonic Corporation | Decorative member |
| JP2020116799A (en) * | 2019-01-22 | 2020-08-06 | マツダ株式会社 | Method and apparatus for molding foam resin molded product |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52146476A (en) * | 1976-06-01 | 1977-12-06 | Asahi Glass Co Ltd | Method of formation of fiber reinforced thermoosetting resin by injection method |
| JPS6341116A (en) * | 1986-08-07 | 1988-02-22 | Meiwa Sangyo Kk | Manufacture of laminated molding with decorative sheet |
-
1988
- 1988-10-11 JP JP63253794A patent/JPH02102010A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52146476A (en) * | 1976-06-01 | 1977-12-06 | Asahi Glass Co Ltd | Method of formation of fiber reinforced thermoosetting resin by injection method |
| JPS6341116A (en) * | 1986-08-07 | 1988-02-22 | Meiwa Sangyo Kk | Manufacture of laminated molding with decorative sheet |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0676267A1 (en) * | 1994-04-04 | 1995-10-11 | Toyoda Gosei Co., Ltd. | Resin molding method |
| US6004498A (en) * | 1994-04-04 | 1999-12-21 | Toyoda Gosei Co. Ltd. | Method for molding resin to skin members |
| EP0704290A1 (en) * | 1994-09-01 | 1996-04-03 | Sumitomo Chemical Company Limited | Process for manufacturing thermoplastic resin moldings |
| US6342176B2 (en) | 1997-12-25 | 2002-01-29 | Toyoda Gosei Co., Ltd. | Methods for molding resin-molded articles |
| EP0953423A1 (en) * | 1998-04-30 | 1999-11-03 | Compagnie Plastic Omnium | Method for producing a plastic part partially coated with a film, in particular decorative film |
| FR2778135A1 (en) * | 1998-04-30 | 1999-11-05 | Plastic Omnium Cie | PROCESS FOR PRODUCING A PART IN PLASTIC MATERIAL PARTIALLY COATED WITH A FILM, PARTICULARLY DECORATIVE |
| EP1179404A1 (en) * | 2000-08-02 | 2002-02-13 | Ikuyo Co., Ltd | Apparatus for and method of injection-molding a body of synthetic resin |
| EP2033759A1 (en) * | 2007-09-07 | 2009-03-11 | Peguform Gmbh | Method for manufacturing a moulded part with different decorative areas |
| WO2009033560A1 (en) * | 2007-09-07 | 2009-03-19 | Peguform Gmbh | Method for producing a molded part comprising different decorative zones |
| US8227070B2 (en) | 2009-12-25 | 2012-07-24 | Panasonic Corporation | Decorative member |
| US8415001B2 (en) | 2009-12-25 | 2013-04-09 | Panasonic Corporation | Decorative member |
| JP2020116799A (en) * | 2019-01-22 | 2020-08-06 | マツダ株式会社 | Method and apparatus for molding foam resin molded product |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0542936B2 (en) | 1993-06-30 |
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