JPH0126853B2 - - Google Patents
Info
- Publication number
- JPH0126853B2 JPH0126853B2 JP59229948A JP22994884A JPH0126853B2 JP H0126853 B2 JPH0126853 B2 JP H0126853B2 JP 59229948 A JP59229948 A JP 59229948A JP 22994884 A JP22994884 A JP 22994884A JP H0126853 B2 JPH0126853 B2 JP H0126853B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- passages
- nozzle
- mold
- passage
- 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 24
- 229920005989 resin Polymers 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 14
- 238000001746 injection moulding Methods 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000000088 plastic resin Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing 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
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、プラスチツク樹脂を金型に押し込ん
でプラスチツク樹脂成形品を成形する射出成形方
法に係り、特に２層またはそれ以上の積層数から
なる成形品の射出成形装置に関する。Detailed Description of the Invention (Industrial Application Field) The present invention relates to an injection molding method for molding a plastic resin molded product by forcing plastic resin into a mold, and particularly relates to an injection molding method for molding a plastic resin molded product, particularly an injection molding method comprising two or more laminated layers. This invention relates to an injection molding device for molded products.
（従来の技術）
色相の相異なつた複数の層からなる成形品を射
出成形する方法は種々あり、その共通とするとこ
ろの技術的思想は、１層、２層と順次金型に溶融
樹脂を押し込んで所望の層数からなる成形品を製
造する、というものである。(Prior art) There are various methods for injection molding molded products consisting of multiple layers of different hues, and the common technical idea is to sequentially inject molten resin into a mold in one layer and then two layers. A molded product consisting of a desired number of layers is produced by pressing.
（発明が解決しようとする問題点）
上記のような従来例では、各層の射出が順次に
行われ、換言すれば、先の層の射出が完了した後
次層の射出が行われるので、１個の成形品を製造
するのに層数に応じた射出回数が必要となるた
め、生産性が悪い、という欠点があつた。(Problems to be Solved by the Invention) In the conventional example as described above, each layer is injected sequentially, in other words, the next layer is injected after the previous layer is injected. Since the number of injections required depending on the number of layers is required to manufacture each molded product, productivity is low.
本発明はかかる問題点を解決するためになされ
たもので、一回の射出で平行層からなる複数層の
成形品が成形可能な射出成形装置を得ることを目
的とする。 The present invention has been made to solve these problems, and an object of the present invention is to provide an injection molding apparatus that can mold a plurality of parallel layer molded products in a single injection.
（問題点を解決するための手段）
本発明はスクリユが往復動可能に挿嵌された複
数の加熱筒を設け、該加熱筒のそれぞれから射出
される溶融樹脂の樹脂通路を一つの主樹脂通路に
連通させるようにしたノズルを設け、該ノズルに
於ける複数の樹脂通路と該主樹脂通路との境界よ
りも上流側の樹脂通路の各々が一定の幅と一定の
厚さとを有する矩形断面形状の面にて隔離され且
つ主樹脂通路に該複数の樹脂通路からの溶融樹脂
が層状にて助走し得るように一定の長さの助走部
を設けたものである。(Means for Solving the Problems) The present invention provides a plurality of heating cylinders in which screws are reciprocally inserted, and a resin passage for molten resin injected from each of the heating cylinders is integrated into one main resin passage. A nozzle is provided that communicates with the main resin passage, and each of the resin passages in the nozzle on the upstream side of the boundary between the plurality of resin passages and the main resin passage has a rectangular cross-sectional shape having a constant width and a constant thickness. A run-up portion of a certain length is provided so that the molten resin from the plurality of resin passages can run-up in a layered manner in the main resin passage.
（作用）
各加熱筒に色相の相異なる溶融樹脂を貯留させ
同時に射出させると、溶融樹脂は噴出路７，８，
１７，１８，１９を通り、さらに助走部２３で互
いに混じり合うことなく平行層の状態を保持して
合流し、この状態で金型のキヤビテイに充填さ
れ、加熱筒の数に応じた積層数を有する成形品が
成形される。(Function) When molten resins with different hues are stored in each heating cylinder and injected at the same time, the molten resin is
17, 18, and 19, and then merge in the run-up part 23 while maintaining a parallel layer state without mixing with each other. In this state, the mold cavity is filled, and the number of layers is determined according to the number of heating cylinders. A molded article having the following properties is molded.
（実施例）
以下図面に示す実施例を参照しながら本発明を
説明すると、第１図は本発明に使用される射出成
形機１と金型１ａとを示すもので、射出成形機１
は、２つの加熱筒２，３を有しており、それぞれ
の加熱筒２，３には、スクリユ２ａ，３ａが回転
往復動自在に嵌挿されている。(Embodiment) The present invention will be described below with reference to embodiments shown in the drawings. FIG. 1 shows an injection molding machine 1 and a mold 1a used in the present invention.
has two heating cylinders 2 and 3, and screws 2a and 3a are fitted into each of the heating cylinders 2 and 3 so as to be rotatable and reciprocating.
それぞれの加熱筒２，３の先端には、ノズル４
方向に伸長する流路５，６の一端が開口してい
る。 A nozzle 4 is installed at the tip of each heating cylinder 2, 3.
One end of the channels 5 and 6 extending in the direction is open.
上記ノズル４は、加熱筒２，３に応じた数の噴
出路７，８と、噴出路７，８から流出する溶融樹
脂が層状にて助足しうる助走部２３と、１つの噴
出口９とを備えており、該噴出路７，８の基端
は、流路５，６の他端に開口しており、また該噴
出路７，８の先端は助走部２３に開口し、助走部
２３は噴出口９に開口している。 The nozzle 4 has a number of ejection passages 7 and 8 corresponding to the number of heating cylinders 2 and 3, a run-up portion 23 in which the molten resin flowing out from the ejection passages 7 and 8 can be assisted in a layered manner, and one ejection port 9. The base ends of the ejection passages 7, 8 are open to the other ends of the flow passages 5, 6, and the tips of the ejection passages 7, 8 are open to the run-up part 23. is open to the spout 9.
ところで、上記噴出路７，８であるが、これら
は、第２図及び第３図に示すように、上下に所定
の間隔Ｄをおいて配置されている。これら噴出路
７，８の断面形状としては、円弧７ａ，８ａと弦
７ｂ，８ｂとによつて形成される三日月形状であ
ることが好ましく、さらに、これら円弧７ａ，８
ａは、同一円周上にあり、しかも１対の弦７ｂ，
８ｂは、互いに平行状となつているのが好まし
く、しかも、これら円弧７ａ，７ｂを、円周の一
部とする円の直径と噴出口９の断面における直径
とは相等しく、しかも両者の中心は同一軸線上に
あることが好ましい。 By the way, the ejection passages 7 and 8 are arranged vertically at a predetermined interval D, as shown in FIGS. 2 and 3. The cross-sectional shape of these ejection passages 7 and 8 is preferably a crescent shape formed by arcs 7a and 8a and chords 7b and 8b;
a are on the same circumference, and a pair of strings 7b,
8b are preferably parallel to each other, and furthermore, the diameter of a circle that includes these arcs 7a and 7b as part of the circumference and the diameter in the cross section of the jet nozzle 9 are equal to each other, and the center of both is equal. are preferably on the same axis.
金型１ａは、上下動自在な可動金型１０と固定
金型型１１とからなり、前記ノズル４は、金型２
の側面、つまり、これら可動金型１０と固定金型
１１との間に臨まされ、射出が行なわれる。すな
わち、両金型１０，１１の型締時に形成されるキ
ヤビテイは、水平となつた導入部１２と、底面が
上位となつた截頭円錐部１３とからなり、射出が
行われると、上下に２層が形成されるようになつ
ている。 The mold 1a consists of a movable mold 10 that can move up and down and a fixed mold 11, and the nozzle 4 is connected to the mold 2.
Injection is performed by facing the sides of the movable mold 10 and the fixed mold 11. That is, the cavity formed when both molds 10 and 11 are clamped consists of a horizontal introduction part 12 and a truncated conical part 13 with the bottom facing upward. Two layers are formed.
もちろん金型１ａによつて形成されるキヤビテ
イの形状は、第１図のものに限定されることはな
く、積層状態の成形品が得られるように射出方向
沿いに拡がる形状であれば適宜選択し得る。 Of course, the shape of the cavity formed by the mold 1a is not limited to that shown in FIG. 1, and may be appropriately selected as long as it expands along the injection direction so as to obtain a laminated molded product. obtain.
第４図及び第５図は、３つの加熱筒１４，１
５，１６を有する射出成形機を示すもので、この
例では流路１７ａ，１８ａ，１９ａに連通する３
つの噴出路１７，１８，１９は、第５図に示すよ
うに、上下方向に所定の間隔をおいて配置されて
いる。つまり、第３図に示す上下の三日月形状の
噴出路７，８間に、第３の噴出路が設けられた配
置となつている。尚、２０，２１，２２はスクリ
ユである。 4 and 5 show three heating cylinders 14, 1
5 and 16, in this example, the injection molding machine has three
The three ejection passages 17, 18, and 19 are arranged at predetermined intervals in the vertical direction, as shown in FIG. In other words, the third ejection passage is provided between the upper and lower crescent-shaped ejection passages 7 and 8 shown in FIG. Note that 20, 21, and 22 are screws.
上記では、加熱筒の数は、２つまたは３つの例
が示されているが、これに限らずその数は適宜選
択し得る。 In the above example, the number of heating cylinders is two or three, but the number is not limited to this and can be selected as appropriate.
また、噴出路７，８，１７，１８，１９の断面
形状も、上記に限らず他の形状でもよく、さらに
その断面積を相異ならせば、第６図に示すよう
に、厚さt1，t2の相異なる成形品が得られること
になる。 Further, the cross-sectional shapes of the ejection passages 7, 8, 17, 18, and 19 are not limited to those described above, but may be other shapes, and if the cross-sectional areas are made different, the thickness t 1 as shown in FIG. , t 2 different molded products are obtained.
上記構成に係る装置を使用するには、加熱筒
２，３，１４，１５，１６にプラスチツク樹脂を
貯溜させた後、同時にスクリユ２ａ，３ａ，２
０，２１，２２を前進させる。この場合、ノズル
４はキヤビテイの導入部１２に臨ませておく。 In order to use the apparatus according to the above configuration, after storing plastic resin in the heating cylinders 2, 3, 14, 15, 16, the screws 2a, 3a, 2
Advance 0, 21, 22. In this case, the nozzle 4 is placed facing the introduction section 12 of the cavity.
（効果）
本発明は、以上から明らかなように、１回の射
出によつて複数層からなる成形品が得られるの
で、生産性が向上することになる。(Effects) As is clear from the above, in the present invention, a molded article consisting of a plurality of layers can be obtained by one injection, so that productivity is improved.
第１図は本発明に使用される装置の略示断面
図、第２図はノズルの部分の拡大図、第３図は第
２図のＡ−Ａ線に沿う断面図、第４図は第１図に
示す装置の異種例を示す略示断面図、第５図は第
４図のＢ−Ｂ線に沿う断面図、第６図は２層の厚
さが相異なる成形品の一例の断面図である。
１ａ……金型、２，３，１４，１５，１６……
加熱筒、４……ノズル、５，６，１７ａ，１８
ａ，１９ａ……流路（樹脂通路）、７，８，１７，
１８，１９……噴出路（樹脂通路）、９……噴出
口、２３……助走部。
FIG. 1 is a schematic sectional view of the device used in the present invention, FIG. 2 is an enlarged view of the nozzle portion, FIG. 3 is a sectional view taken along line A-A in FIG. 2, and FIG. A schematic cross-sectional view showing a different example of the device shown in Figure 1, Figure 5 is a cross-sectional view taken along line B-B in Figure 4, and Figure 6 is a cross-sectional view of an example of a molded product with two layers having different thicknesses. It is a diagram. 1a... Mold, 2, 3, 14, 15, 16...
Heating tube, 4... Nozzle, 5, 6, 17a, 18
a, 19a...flow path (resin passage), 7, 8, 17,
18, 19... Ejection passage (resin passage), 9... Ejection port, 23... Run-up section.
Claims (1)
熱筒を設け、該加熱筒のそれぞれから射出される
溶融樹脂の樹脂通路を一つの主樹脂通路に連通さ
せるようにしたノズルを設け、該ノズルに於ける
複数の樹脂通路と該主樹脂通路との境界よりも上
流側の樹脂通路の各々が一定の幅と一定の厚さと
を有する矩形断面形状の面にて隔離され且つ主樹
脂通路に該複数の樹脂通路からの溶融樹脂が層状
にて助走し得るように一定の長さの助走部を設け
たことを特徴とする複数層成形用射出成形装置。1 A plurality of heating cylinders into which screws are reciprocally inserted are provided, a nozzle is provided in which a resin passage for molten resin injected from each of the heating cylinders communicates with one main resin passage, and the nozzle Each of the resin passages on the upstream side of the boundary between the plurality of resin passages and the main resin passage in An injection molding apparatus for multi-layer molding, characterized in that a run-up portion of a certain length is provided so that molten resin from a plurality of resin passages can run-up in a layered manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22994884A JPS61108521A (en) | 1984-10-31 | 1984-10-31 | Multi-layer injection molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22994884A JPS61108521A (en) | 1984-10-31 | 1984-10-31 | Multi-layer injection molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61108521A JPS61108521A (en) | 1986-05-27 |
| JPH0126853B2 true JPH0126853B2 (en) | 1989-05-25 |
Family
ID=16900225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22994884A Granted JPS61108521A (en) | 1984-10-31 | 1984-10-31 | Multi-layer injection molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61108521A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4808101A (en) * | 1986-05-12 | 1989-02-28 | Husky Injection Molding Systems Ltd. | Tri-injection of hollow articles |
| US5202074A (en) * | 1989-12-26 | 1993-04-13 | The Dow Chemical Company | Method for producing injection molded multilayer articles |
| US5380479A (en) * | 1989-12-26 | 1995-01-10 | The Dow Chemical Company | Method and apparatus for producing multilayer plastic articles |
| US11254512B2 (en) * | 2020-02-25 | 2022-02-22 | Joy Global Underground Mining Llc | Alignment and connection mechanism for coupling frame members |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5314759A (en) * | 1976-07-27 | 1978-02-09 | Asahi Dow Ltd | Method and device for injection molding multiilayer molded article |
| JPS56106838A (en) * | 1979-12-28 | 1981-08-25 | Toppan Printing Co Ltd | Menufacture of multilayer vessel |
| JPS56106840A (en) * | 1980-01-25 | 1981-08-25 | Toppan Printing Co Ltd | Manufacture of multilayer vessel and metal mold therefor |
-
1984
- 1984-10-31 JP JP22994884A patent/JPS61108521A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5314759A (en) * | 1976-07-27 | 1978-02-09 | Asahi Dow Ltd | Method and device for injection molding multiilayer molded article |
| JPS56106838A (en) * | 1979-12-28 | 1981-08-25 | Toppan Printing Co Ltd | Menufacture of multilayer vessel |
| JPS56106840A (en) * | 1980-01-25 | 1981-08-25 | Toppan Printing Co Ltd | Manufacture of multilayer vessel and metal mold therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61108521A (en) | 1986-05-27 |
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