JPH04176620A - Internal and external heating disc gate device - Google Patents
Internal and external heating disc gate deviceInfo
- Publication number
- JPH04176620A JPH04176620A JP30561990A JP30561990A JPH04176620A JP H04176620 A JPH04176620 A JP H04176620A JP 30561990 A JP30561990 A JP 30561990A JP 30561990 A JP30561990 A JP 30561990A JP H04176620 A JPH04176620 A JP H04176620A
- Authority
- JP
- Japan
- Prior art keywords
- mandrel
- jacket
- heater
- resin
- internal
- 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
- 238000010438 heat treatment Methods 0.000 title claims description 8
- 239000011347 resin Substances 0.000 claims abstract description 19
- 229920005989 resin Polymers 0.000 claims abstract description 19
- 238000010137 moulding (plastic) Methods 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 abstract description 3
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000000465 moulding Methods 0.000 description 2
- 206010040925 Skin striae Diseases 0.000 description 1
- 230000000694 effects Effects 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
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/30—Flow control means disposed within the sprue channel, e.g. "torpedo" construction
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding 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、プラスチック射出成形金型に用いられるホッ
トランナ装置で、中心に円形の孔を持つ成形品の成形に
適する内外加熱ディスクゲート装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a hot runner device used for plastic injection molds, and an internal and external heating disk gate device suitable for molding molded products having a circular hole in the center. .
（従来の技術と発明が解決しようとする課題）円形状の
成形品２例えば情報ディスクまたは円筒状成形品を成形
する際、成形品を真円に近く成形するため、小さなゲー
トを成形品上に多く設けて射出点を多くして極力真円に
近い成形品を得ようとする試みがなされている。(Prior art and problems to be solved by the invention) Circular molded product 2 For example, when molding an information disk or a cylindrical molded product, a small gate is placed on the molded product in order to mold the molded product to be close to a perfect circle. Attempts have been made to increase the injection points by increasing the number of injection points to obtain a molded product as close to a perfect circle as possible.
しかし、真円に近づけるには無数に多くの射出点を必要
とし、品質の上でも費用の面でも問題があった。However, making it close to a perfect circle requires an infinite number of injection points, which poses problems both in terms of quality and cost.
特に成形品の内部の密度が均一でしかも有害な脈理等の
発生を防止するためには、−様な注入が行われることが
好ましく、射出点が有限の場合は問題になり得る。In particular, in order to ensure that the density inside the molded product is uniform and to prevent the occurrence of harmful striae, it is preferable to carry out injection in a similar manner, which may be a problem if the injection point is limited.
本発明の目的は、キャビティに樹脂を供給するゲートの
形状を円周状スリットとしキャビティに樹脂を送り込む
ようにし、このようなスリットに熔融樹脂を供給する経
路（ランナ）を内外部から加熱するようにした内外加熱
ディスクゲート装置を提供することにある。The object of the present invention is to make the gate for supplying resin into the cavity have a circumferential slit shape to feed the resin into the cavity, and to heat the path (runner) for supplying the molten resin to such slit from the inside and outside. An object of the present invention is to provide an internal/external heating disc gate device.
（課題を解決するための手段）
前記目的を達成するために本発明による内外加熱ディス
クゲートは、プラスチック成形型装置において、
溶融樹脂が接続されるマンドレルの外周とジャケット間
に円管状の部分とこれに連接し円錐状に開き、型のキャ
ビティに円周状に接続させられるゲートを形成し、
前記マンドレルの中心に内部ヒータ、前記ジャケットの
外周に外部ヒータを配置し、
前記マンドレルとジャケット間に形成される前記構造の
ランチとゲート部を内部および外部から加熱可能に構成
されている。(Means for Solving the Problems) In order to achieve the above object, the internal and external heating disk gate according to the present invention has a circular tubular portion between the jacket and the outer periphery of the mandrel to which the molten resin is connected, in a plastic molding device. forming a gate that opens in a conical shape and connects to the mold cavity in a circumferential manner; an internal heater is disposed at the center of the mandrel; an external heater is disposed at the outer periphery of the jacket; and a gate is formed between the mandrel and the jacket. The launch and gate portions of the structure can be heated from inside and outside.
（作用）
外部より加熱されるジャケットと内部にヒータを持つマ
ンドレルの各先端をテーパ状に開き、その間で形成され
る円周状スリットをゲートとしているから、ジャケット
側スリット面は外部ヒータにより加熱されマンドレル側
スリット面は内部より加熱される。(Function) The mandrel has a jacket heated from the outside and a heater inside. Each tip of the mandrel is opened in a tapered shape, and the circumferential slit formed between them is used as a gate, so the slit surface on the jacket side is heated by the external heater. The slit surface on the mandrel side is heated from inside.
したがって、樹脂はスリ・７ト内を固化することなく円
滑に流動し、射出される。Therefore, the resin flows smoothly within the slit 7 without solidifying, and is injected.
（実施例） 本発明を図面等を参照して、さらに詳しく説明する。(Example) The present invention will be explained in more detail with reference to the drawings and the like.
第１図は、本発明による内外加熱ディスクゲート装置の
実施例を示す断面図である。FIG. 1 is a sectional view showing an embodiment of the internal/external heating disk gate device according to the present invention.
溶融された樹脂はマシンノズル１より本装置のマンドレ
ル３の中心に流入させられる。The molten resin is made to flow into the center of the mandrel 3 of this apparatus from the machine nozzle 1.
さらに樹脂は内部ヒータ２で加熱されたマンドレル３と
外部ヒータ４で加熱されたジャケット５の間に形成され
た円管状の空間により形成されるランナ部３ｂに通路３
ａ・・・３ａを介して流入させられる。Furthermore, the resin is passed through a passage 3 in a runner section 3b formed by a circular tubular space formed between a mandrel 3 heated by an internal heater 2 and a jacket 5 heated by an external heater 4.
a... Flows in through 3a.
内部ヒータ２はセラミックのカートリッジヒータであっ
てマンドレル３の下側から挿入され、ばねを入れてねじ
込み固定され、樹脂通路を内部から加熱する。The internal heater 2 is a ceramic cartridge heater that is inserted from below the mandrel 3, screwed into place with a spring, and heated to heat the resin passage from the inside.
内部ヒータ２にはマンドレル３の上側に設けられている
孔から外部電源に接続され電力が供給されている。The internal heater 2 is connected to an external power source and supplied with power through a hole provided on the upper side of the mandrel 3.
前記円管状の空間のランナ部３ｂは円錐状に開き、円周
状スリット６ａから、型９．１０により形成されるキャ
ビティ空間に接続される。The runner portion 3b of the cylindrical space opens conically and is connected to the cavity space formed by the mold 9.10 through the circumferential slit 6a.
下方が円錐状に拡がるジャケット６の外周には円管状の
セラミックヒータよりなる外部ヒータ４が配置されてい
る。An external heater 4 made of a cylindrical ceramic heater is disposed around the outer periphery of the jacket 6 whose bottom part expands conically.
これによりジャケット５が加熱され樹脂の流路は内外部
から加熱される。As a result, the jacket 5 is heated and the resin flow path is heated from the inside and outside.
（発明の効果）
以上詳しく説明したように、本発明による内外加熱ディ
スクゲートは、プラスチック成形型装置において、外部
より加熱されるジャケットと内部にヒータを持つマンド
レルの各先端をテーバ状に開き、その間で形成される円
周状スリットをゲートとしているから、ジャケット側ス
リット面は外部ヒータにより加熱されマンドレル側スリ
ット面は内部より加熱されるように構成されている。(Effects of the Invention) As explained above in detail, the inner and outer heating disk gate according to the present invention is used in a plastic molding device by opening each tip of a mandrel having a jacket heated from the outside and a heater inside in a tapered shape, and Since the circumferential slit formed by the gate is used as a gate, the slit surface on the jacket side is heated by an external heater, and the slit surface on the mandrel side is heated from the inside.
したがって、樹脂はスリット内を固化することはなく均
一な樹脂の供給が可能となる。Therefore, the resin does not solidify inside the slit, and the resin can be uniformly supplied.
第１図は本発明による内外加熱ディスクゲート装置の実
施例を示す断面図である。
１・・・マシンノズル
２・・・内部ヒータ
３・・・マンドレル
３ａ・・・連結流路
３ｂ・・・円管状のランナ
４・・・外部ヒータ
５・・・ジャケット
６・・・円錐状スリット
６ａ・・・円周状スリット（ゲート）
７・・・成形品
９．１０・・・型FIG. 1 is a sectional view showing an embodiment of the internal/external heating disk gate device according to the present invention. 1...Machine nozzle 2...Internal heater 3...Mandrel 3a...Connecting channel 3b...Cylindrical runner 4...External heater 5...Jacket 6...Conical slit 6a... Circumferential slit (gate) 7... Molded product 9.10... Mold
Claims (1)
に円管状の部分とこれに連接し円錐状に開き、型のキャ
ビティに円周状に接続させられるゲートを形成し、 前記マンドレルの中心に内部ヒータ、前記ジャケットの
外周に外部ヒータを配置し、 前記マンドレルとジャケット間に形成される前記構造の
ランナとゲート部を内部および外部から加熱可能に構成
したことを特徴とする内外加熱ディスクゲート装置。[Claims] In a plastic molding device, there is a cylindrical part between the outer periphery of the mandrel to which the molten resin is connected and the jacket, which is connected to the cylindrical part and opens into a conical shape, and which is connected to the cavity of the mold in a circumferential manner. A gate is formed, an internal heater is arranged at the center of the mandrel, and an external heater is arranged around the outer periphery of the jacket, so that the runner and gate part of the structure formed between the mandrel and the jacket can be heated from inside and outside. An internal/external heating disc gate device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2305619A JPH0710547B2 (en) | 1990-11-09 | 1990-11-09 | Internal and external heating disc gate device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2305619A JPH0710547B2 (en) | 1990-11-09 | 1990-11-09 | Internal and external heating disc gate device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04176620A true JPH04176620A (en) | 1992-06-24 |
| JPH0710547B2 JPH0710547B2 (en) | 1995-02-08 |
Family
ID=17947320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2305619A Expired - Fee Related JPH0710547B2 (en) | 1990-11-09 | 1990-11-09 | Internal and external heating disc gate device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0710547B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6273916U (en) * | 1985-10-28 | 1987-05-12 |
-
1990
- 1990-11-09 JP JP2305619A patent/JPH0710547B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6273916U (en) * | 1985-10-28 | 1987-05-12 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0710547B2 (en) | 1995-02-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |