JPH0124052B2 - - Google Patents
Info
- Publication number
- JPH0124052B2 JPH0124052B2 JP6972584A JP6972584A JPH0124052B2 JP H0124052 B2 JPH0124052 B2 JP H0124052B2 JP 6972584 A JP6972584 A JP 6972584A JP 6972584 A JP6972584 A JP 6972584A JP H0124052 B2 JPH0124052 B2 JP H0124052B2
- Authority
- JP
- Japan
- Prior art keywords
- internal nozzle
- diameter part
- mold
- resin
- nozzle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000011347 resin Substances 0.000 claims description 35
- 229920005989 resin Polymers 0.000 claims description 35
- 238000001746 injection moulding Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 description 12
- 238000000465 moulding Methods 0.000 description 6
- 239000000155 melt Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010137 moulding (plastic) Methods 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
- B29C45/164—The moulding materials being injected simultaneously
-
- 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
- B29C45/1603—Multi-way nozzles specially adapted therefor
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はプラスチツク成形の分野のうち成形品
の２層成形を行う射出成形装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an injection molding apparatus for performing two-layer molding of a molded article in the field of plastic molding.
（従来技術）
従来２層成形を行うにはタイプライターのキー
トツプの成形のように外層を最初射出し、次に外
層成形した成形品を金型の雄型に保持したまま回
転させ、別の金型キヤビテイに於いて外層を射出
成形する方法が行われている。(Prior art) Conventionally, to perform two-layer molding, the outer layer is first injected, as in the molding of a typewriter key top, and then the outer layer molded product is rotated while being held in the male mold, and then injected into another mold. A method is used in which the outer layer is injection molded in a mold cavity.
（発明の目的）
本発明は２層成形を１つの金型キヤビテイに同
時に２種類の樹脂を射出して行う新規な装置を提
供するものである。(Objective of the Invention) The present invention provides a novel apparatus for performing two-layer molding by simultaneously injecting two types of resin into one mold cavity.
（発明の構成）
本発明の構成は機台に固定した固定側金型を取
り付ける固定盤と可動側金型を取り付ける可動盤
をステーに沿つて往復動し且つ金型を圧締する型
締装置と金型キヤビテイに２種類の溶融樹脂を射
出する装置において、第１加熱筒内孔から連通す
る第１樹脂通路と第２加熱筒内孔から連通する第
２樹脂通路とをそれぞれ連通させたノズル本体を
設け、該ノズル本体内孔に小径部と大径部とを備
え小径部により円環状の第２空所を設けるように
して進退可能に挿嵌した内部ノズルを設け、該内
部ノズル内に円環状の第１空所を設けるようにし
且つ該内部ノズルの先端孔を後退限度によつて開
放又は前進限度によつて遮断するように挿嵌し弁
捧を設け、第１樹脂通路と第１空所とを連通又は
遮断させるために該内部ノズルの大径部に設けた
連通孔を設け、第２樹脂通路に該内部ノズルの小
径部を位置させ第２空所とを連通させ該内部ノズ
ルの大径部を位置させることによつて第２樹脂通
路を遮断するようにし且つ該内部ノズルの前進限
度を決めるストツパーを設けたシリンダを設けた
ことを特長とする２層射出成形機にある。(Structure of the Invention) The structure of the present invention is a mold clamping device that reciprocates a fixed plate for attaching a fixed side mold fixed to a machine base and a movable plate for attaching a movable side mold along a stay and clamps the mold. In an apparatus for injecting two types of molten resin into a mold cavity, a nozzle in which a first resin passage communicating from an inner hole of a first heating cylinder and a second resin passage communicating from an inner hole of a second heating cylinder are communicated with each other. A main body is provided, and an internal nozzle is provided in the internal nozzle body, the inner nozzle having a small diameter part and a large diameter part and inserted into the inner nozzle so as to be movable in a manner such that the small diameter part forms a second annular space. A ring-shaped first cavity is provided, and a valve socket is inserted and inserted so as to open the tip hole of the internal nozzle by the retraction limit or block it by the forward limit, and the first resin passage and the first A communication hole is provided in the large diameter part of the internal nozzle to communicate with or block the cavity, and the small diameter part of the internal nozzle is positioned in the second resin passage to communicate with the second cavity. A two-layer injection molding machine is provided with a cylinder provided with a stopper for blocking the second resin passage by locating a large diameter portion of the inner nozzle and for determining the limit of advancement of the internal nozzle.
（実施例）
図面に従つて実施例を説明する。第１図に於い
て１は機台に固定した固定盤であり、２はステー
３に沿つて往復動する可動盤である。４は固定盤
１に固定した固定側金型であり、５は可動盤に固
定した可動側金型である。６は内層用の樹脂を溶
融する第１加熱筒であり、７は外層用の樹脂を溶
融する第２加熱筒であり、８は第１加熱筒６内に
て回転往復動する第１スクリユであり、９は第２
加熱筒７内にて回転往復動する第２スクリユであ
る。１０はノズル本体であり、１０ａはノズル本
体１０の内孔であり（以下ノズル本体内孔とい
う）、１１は第１加熱筒６内の溶融樹脂をノズル
本体内孔１０ａに連通する第１樹脂通路であり、
１２は第２加熱筒７内の溶融樹脂をノズル本体内
孔１０ａに連通する第２樹脂通路である。１３は
ノズル本体１０のノズル本体内孔１０ａに移動可
能に挿嵌した内部ノズルである。１４は内部ノズ
ル１３の先端孔１３ａを開閉するための弁捧であ
り、内部ノズル１３の中心部を貫通している。１
５は内部ノズル１３の内孔１３ｂと弁捧１４の外
径との間に設けた第１空所であり、第１樹脂通路
１１と連通することができる。１６はノズル本体
内孔１０ａと内部ノズル１３の先端外径１３ｃの
間に設けた第２空所であり、第２樹脂通路１２と
連通することができる。１７はノズル本体１０と
連結したシリンダであり、シリンダ１７は第１シ
リンダ室１８と第２シリンダ室１９からなり、第
１シリンダ室１８に内部ノズル１３の後端ピスト
ン部１３ｄを挿嵌し、第２シリンダ室１９に弁捧
１４のピストン部１４ｃを挿嵌している。２０は
弁捧の前進限度を決めるナツトであり、弁捧１４
の後端部に蝶合させている。２１は弁捧１４の後
退限度を決めるボルトである。(Example) An example will be described according to the drawings. In FIG. 1, 1 is a fixed plate fixed to the machine base, and 2 is a movable plate that reciprocates along the stay 3. 4 is a fixed mold fixed to the fixed platen 1, and 5 is a movable mold fixed to the movable platen. 6 is a first heating cylinder that melts the resin for the inner layer, 7 is a second heating cylinder that melts the resin for the outer layer, and 8 is a first screw that rotates and reciprocates within the first heating cylinder 6. Yes, 9 is the second
This is a second screw that rotates and reciprocates within the heating cylinder 7. 10 is a nozzle body, 10a is an inner hole of the nozzle body 10 (hereinafter referred to as the nozzle body inner hole), and 11 is a first resin passage that communicates the molten resin in the first heating cylinder 6 to the nozzle body inner hole 10a. and
Reference numeral 12 denotes a second resin passage that communicates the molten resin in the second heating cylinder 7 to the nozzle body inner hole 10a. Reference numeral 13 denotes an internal nozzle that is movably inserted into the nozzle body inner hole 10a of the nozzle body 10. Reference numeral 14 denotes a valve opening for opening and closing the tip hole 13a of the internal nozzle 13, which passes through the center of the internal nozzle 13. 1
A first cavity 5 is provided between the inner hole 13b of the internal nozzle 13 and the outer diameter of the valve head 14, and can communicate with the first resin passage 11. A second cavity 16 is provided between the nozzle body inner hole 10a and the outer diameter 13c of the tip of the internal nozzle 13, and can communicate with the second resin passage 12. 17 is a cylinder connected to the nozzle body 10, and the cylinder 17 consists of a first cylinder chamber 18 and a second cylinder chamber 19. The rear end piston part 13d of the internal nozzle 13 is inserted into the first cylinder chamber 18, and the The piston portion 14c of the valve head 14 is inserted into the two-cylinder chamber 19. 20 is the nut that determines the forward limit of Bensho, and Bensho 14
It is hinged at the rear end of the. 21 is a bolt that determines the retraction limit of the bento 14.
２３は内部ノズルの前進限度を決めるためのス
トツパーであり内部ノズル１３を摺動可能にした
内孔を設け外周をシリンダ１７の側部に嵌合して
いる。 Reference numeral 23 denotes a stopper for determining the forward limit of the internal nozzle, and has an inner hole through which the internal nozzle 13 can slide, and its outer periphery fits into the side of the cylinder 17.
次に作動について説明する。可動盤２を前進さ
せて金型を閉じ、第１シリンダ室１８の油孔１８
ａにポンプ（図示せず）から油を流入させ、内部
ノズル１３を前進させ後端ピストン部１３ｄの端
面をストツパ２３に当接させ内部ノズルの先端を
金型キヤビテイ内に予め定めた位置まで突出させ
る。ストツパ２３の位置を変えることによつて層
の厚みを変えることができる。このとき弁捧１４
は後退位置にあり、内部ノズル１３の内孔１３ｂ
を開放しておく。次に第１加熱筒６内にて溶融し
た樹脂を第１スクリユ８を前進させて射出し第１
樹脂通路１１を径て第１空所１５から第１層樹脂
２３を金型キヤビテイ２２内に射出し同時に第２
加熱筒７内にて溶融した樹脂を第２スクリユ９を
前進させて射出し、第２樹脂通路１２を経て第２
空所１６から第２層樹脂２４を金型キヤビテイ２
２内に射出する。本発明においては内部ノズル１
３の先端が金型キヤビテイ２２内に突出している
位置により第２層樹脂２４の厚さが決まる。第１
層樹脂２３と第２層樹脂２４とを予め定めた量を
射出した後、第２シリンダ室１９に油孔１９ａに
油を流入させ、弁捧１４を前進させ内部ノズルの
先端孔１３ａを閉じ、次に内部ノズル１３を先端
孔１３ａを弁捧１４により閉じたまま第４図に示
すように後退させ更に内部ノズル１３の先端外周
の僅かな隙間より第２空所１６から第２層樹脂２
４を若干射出して内部ノズル１３の先端を後退さ
せ充満部分を補充し、成形品が冷却するまで保圧
し後金型を開き成形品を取り出す。 Next, the operation will be explained. Move the movable platen 2 forward to close the mold and open the oil hole 18 in the first cylinder chamber 18.
Oil is flowed into a from a pump (not shown), the internal nozzle 13 is moved forward, the end surface of the rear end piston portion 13d is brought into contact with the stopper 23, and the tip of the internal nozzle is projected into the mold cavity to a predetermined position. let By changing the position of the stopper 23, the thickness of the layer can be changed. At this time Bento 14
is in the retracted position, and the inner hole 13b of the inner nozzle 13
Leave it open. Next, the resin melted in the first heating cylinder 6 is injected by advancing the first screw 8.
The first layer resin 23 is injected into the mold cavity 22 from the first cavity 15 through the resin passage 11, and at the same time the second layer resin 23 is injected into the mold cavity 22 through the resin passage 11.
The resin melted in the heating cylinder 7 is injected by moving the second screw 9 forward, and is injected through the second resin passage 12 into the second
Transfer the second layer resin 24 from the empty space 16 to the mold cavity 2.
Inject into 2. In the present invention, the internal nozzle 1
The thickness of the second layer resin 24 is determined by the position where the tip of the second layer 3 protrudes into the mold cavity 22. 1st
After injecting a predetermined amount of the layer resin 23 and the second layer resin 24, oil is allowed to flow into the oil hole 19a in the second cylinder chamber 19, the valve head 14 is advanced, and the tip hole 13a of the internal nozzle is closed. Next, the internal nozzle 13 is moved back as shown in FIG. 4 with the tip hole 13a closed by the valve holder 14, and then the second layer resin 2 is transferred from the second cavity 16 through a small gap around the outer periphery of the tip of the internal nozzle 13.
4 is slightly injected, the tip of the internal nozzle 13 is retracted to replenish the filled part, and the pressure is maintained until the molded product is cooled. After that, the mold is opened and the molded product is taken out.
（効果）
本発明は２層成形を２種類の樹脂を同時に射出
して行うことを可能にし短いサイクルにて成形を
完了し層の厚さを調整できるようにしたことは本
発明の効果である。(Effects) The present invention makes it possible to perform two-layer molding by simultaneously injecting two types of resin, complete the molding in a short cycle, and adjust the layer thickness. .
第１図は本発明の実施例を示す装置の一部断面
図を含む正面図であり、第２図乃至第４図は作動
の状態を示す要部拡大断面図である。
１：固定盤、２：可動盤、６：第１加熱筒、
７：第２加熱筒、１０：ノズル本体、１１：第１
樹脂通路、１２：第２樹脂通路、１３：内部ノズ
ル、１４：弁捧、１７：シリンダ、１８：第１シ
リンダ室、１９：第２シリンダ室。
FIG. 1 is a front view including a partial sectional view of an apparatus showing an embodiment of the present invention, and FIGS. 2 to 4 are enlarged sectional views of main parts showing operating states. 1: fixed plate, 2: movable plate, 6: first heating cylinder,
7: Second heating cylinder, 10: Nozzle body, 11: First
Resin passage, 12: Second resin passage, 13: Internal nozzle, 14: Valve, 17: Cylinder, 18: First cylinder chamber, 19: Second cylinder chamber.
Claims (1)
盤と可動側金型を取り付ける可動盤をステーに沿
つて往復動し且つ金型を圧縮する型締装置と金型
キヤビテイに２種類の溶融樹脂を射出する装置に
おいて、第１加熱筒内孔から連通する第１樹脂通
路と第２加熱筒内孔から連通する第２樹脂通路と
をそれぞれ連通させたノズル本体を設け、該ノズ
ル本体内孔に小径部と大径部とを備え該小径部に
より円環状の第２空所を設けるようにして進退可
能に挿嵌した内部ノズルを設け、該内部ノズル内
に円環状の第１空所を設けるようにし且つ該内部
ノズルの先端孔を後退限度によつて開放又は前進
限度によつて遮断するように挿嵌した弁捧を設
け、第１樹脂通路と第１空所とを連通又は遮断さ
せるために該内部ノズルの大径部に設けた連通孔
を設け、第２樹脂通路に該内部ノズルの小径部を
位置させ第２空所とを連通させ該内部ノズルの大
径部を位置させることによつて第２樹脂通路を遮
断するようにし且つ該内部ノズルの前進限度を決
めるストツパーを設けたシリンダを設けたことを
特長とする２層射出成形機。1 Two types of molten resin are used in the mold cavity and the mold clamping device that reciprocates the fixed plate that attaches the fixed side mold fixed to the machine base and the movable plate that attaches the movable side mold along the stay and compresses the mold. In an apparatus for injecting An internal nozzle is provided that has a small diameter part and a large diameter part, and is inserted into the small diameter part so as to be able to move forward and backward so that a second annular space is provided by the small diameter part, and a first annular space is provided within the internal nozzle. In order to communicate or cut off the first resin passage and the first cavity by providing a stopper inserted in the tip hole of the internal nozzle so as to open it by the retraction limit or to block it by the forward limit. A communication hole is provided in the large diameter part of the internal nozzle, and the small diameter part of the internal nozzle is located in the second resin passage to communicate with the second cavity, and the large diameter part of the internal nozzle is located in the second resin passage. A two-layer injection molding machine characterized in that a cylinder is provided with a stopper for blocking the second resin passage and for determining the limit of advancement of the internal nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6972584A JPS60212315A (en) | 1984-04-06 | 1984-04-06 | Double-layers injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6972584A JPS60212315A (en) | 1984-04-06 | 1984-04-06 | Double-layers injection molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60212315A JPS60212315A (en) | 1985-10-24 |
| JPH0124052B2 true JPH0124052B2 (en) | 1989-05-10 |
Family
ID=13411098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6972584A Granted JPS60212315A (en) | 1984-04-06 | 1984-04-06 | Double-layers injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60212315A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2795173B2 (en) * | 1994-05-27 | 1998-09-10 | 株式会社新潟鉄工所 | Nozzle device of injection molding machine |
-
1984
- 1984-04-06 JP JP6972584A patent/JPS60212315A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60212315A (en) | 1985-10-24 |
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