JPH0710547B2 - Internal and external heating disc gate device - Google Patents
Internal and external heating disc gate deviceInfo
- Publication number
- JPH0710547B2 JPH0710547B2 JP2305619A JP30561990A JPH0710547B2 JP H0710547 B2 JPH0710547 B2 JP H0710547B2 JP 2305619 A JP2305619 A JP 2305619A JP 30561990 A JP30561990 A JP 30561990A JP H0710547 B2 JPH0710547 B2 JP H0710547B2
- Authority
- JP
- Japan
- Prior art keywords
- internal
- mandrel
- jacket
- gate
- external heating
- 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 - Fee Related
Links
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)
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。Description: TECHNICAL FIELD The present invention relates to an internal / external heating disk gate device which is a hot runner device used for a plastic injection mold and which is suitable for molding a molded product having a circular hole at 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，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。(Problems to be solved by the prior art and the invention) When molding a circular molded product, such as an information disc or a cylindrical molded product, a small gate is formed on the molded product in order to mold the molded product close to a perfect circle. Attempts have been made to provide a molded product that is as close to a perfect circle as possible by providing many injection points.
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, in order to get close to a perfect circle, an infinite number of injection points are required, and there are problems 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、一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。Particularly, in order to prevent the generation of harmful striae and the like with a uniform density inside the molded product, it is preferable to carry out uniform injection, which may be a problem when the injection point is finite.
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溶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。An object of the present invention is to make a shape of a gate for supplying resin to a cavity into a circumferential slit so as to send the resin into the cavity, and to heat a route (runner) for supplying the molten resin to such a slit from inside and outside. Another object is to provide an inside / outside heating disk 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
クゲート装置は、 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ランナを備えるゲート
と、 前記マンドレルの中心に沿い前記ゲートの位置の内部に
達するように配置された内部ヒータと、 前記ジャケットの外周に配置された外部ヒータと、 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するように
構成されている。(Means for Solving the Problem) In order to achieve the above-mentioned object, an internal / external heating disk gate device according to the present invention is a plastic molding die device, wherein an outer periphery of a mandrel to which molten resin is connected and a tubular portion between the jacket and A gate provided with a runner connected to the conical opening, which is connected circumferentially to the cavity of the mold; an internal heater arranged so as to reach the inside of the position of the gate along the center of the mandrel; An external heater arranged on the outer periphery of the jacket, and a runner and a gate portion of the structure formed between the mandrel and the jacket are 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) Since the jacket that is heated from the outside and each tip of the mandrel that has a heater inside are opened in a taper shape, and the circumferential slit formed between them is the gate, the slit surface on the jacket side is heated by an external heater. 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なく円滑
に流動し、射出される。Therefore, the resin smoothly flows and is injected without solidifying in the slit.
（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 described in more detail with reference to the drawings.
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 an 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 melted resin is caused to flow from the machine nozzle 1 into the center of the mandrel 3 of this apparatus.
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3a・
・・3aを介して流入させられる。Further, the resin passes through a passage 3a to a runner portion 3b formed by a cylindrical space formed between a mandrel 3 heated by an internal heater 2 and a jacket 5 heated by an external heater 4.
..Inflowed via 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 which is inserted from the lower side of the mandrel 3 and is spring-loaded and screwed and fixed 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 from 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 in a conical shape, and is connected to the cavity space formed by the molds 9 and 10 from 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 outer heater 4 made of a circular cylindrical ceramic heater is arranged on the outer circumference of a jacket 6 which extends downward in a conical shape.
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 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ように構成されている。(Effects of the Invention) As described in detail above, the inner / outer heating disk gate according to the present invention is such that, in the plastic molding apparatus, each tip of the mandrel having the jacket heated from the outside and the heater inside is opened in a taper shape. Since the circumferential slit formed in 1 is used as a gate, the jacket side slit surface is heated by an external heater and the mandrel side slit surface 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 in 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 an inside / outside heating disk gate device according to the present invention. 1 …… Machine nozzle 2 …… Internal heater 3 …… Mandrel 3a …… Connecting channel 3b …… Circular tubular runner 4 …… External heater 5 …… Jacket 6 …… Conical slit 6a …… Circular 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ランナを備えるゲート
と、 前記マンドレルの中心に沿い前記ゲートの位置の内部に
達するように配置された内部ヒータと、 前記ジャケットの外周に配置された外部ヒータと、 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するように
構成されている内外加熱ディスクゲート装置。1. A plastic molding die apparatus, wherein a cylindrical portion is connected between the outer periphery of a mandrel to which a molten resin is connected and a jacket, and a conical portion which is connected to this portion and opens conically, and is connected to a cavity of a mold in a circumferential shape. A gate provided with, an internal heater arranged so as to reach the inside of the position of the gate along the center of the mandrel, an external heater arranged on the outer periphery of the jacket, and the internal heater formed between the mandrel and the jacket. An internal / external heating disk gating device configured to heat the runner and gate portion of the structure from inside and outside.
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 JPH04176620A (en) | 1992-06-24 |
| JPH0710547B2 true 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) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2317779A1 (en) * | 2000-09-06 | 2002-03-06 | Mold-Masters Limited | Valve gate assembly for injection molding |
Family Cites Families (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
Non-Patent Citations (1)
| Title |
|---|
| 白石順一郎著「射出成形用金型」日刊工業新聞社（昭５１−１２−１０）第１０６，１０７頁 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04176620A (en) | 1992-06-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |