JPS6141285B2 - - Google Patents
Info
- Publication number
- JPS6141285B2 JPS6141285B2 JP2240181A JP2240181A JPS6141285B2 JP S6141285 B2 JPS6141285 B2 JP S6141285B2 JP 2240181 A JP2240181 A JP 2240181A JP 2240181 A JP2240181 A JP 2240181A JP S6141285 B2 JPS6141285 B2 JP S6141285B2
- Authority
- JP
- Japan
- Prior art keywords
- manifold
- sprue
- heater
- torpedo
- cartridge heater
- 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
- 238000005485 electric heating Methods 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 208000015943 Coeliac disease Diseases 0.000 description 19
- 239000011347 resin Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 238000001746 injection moulding Methods 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000007769 metal material Substances 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)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
この発明は、プラスチツク等の構造物を射出成
形する金型において、ホツトランナーブロツク等
のマニホールドに嵌着したスプルーブツシユ内
で、ゲートをシールするトピードの外周部にカー
トリツジヒータを装着し、上記トピード及び、カ
ートリツジヒータの外誕側を流れる樹脂を所定温
度に加温するよう構成した射出成形用金型のゲー
トシステムに関するものである。DETAILED DESCRIPTION OF THE INVENTION This invention provides a mold for injection molding structures such as plastics, in which a carousel is attached to the outer periphery of a torpedo that seals a gate in a sprue bush fitted to a manifold such as a hot runner block. The present invention relates to a gate system for an injection mold equipped with a cartridge heater and configured to heat resin flowing on the outer side of the torpedo and cartridge heater to a predetermined temperature.
従来、プラスチツク等の構造物を射出成形する
金型のオープンゲート式のものは第１図に示すよ
うに構成されている。図において、１，１はスプ
ルーであり、マニホールド２に嵌着され、ノズル
タツチ３から射出された樹脂の流れは所定の通路
を介してトピード４の上下摺動により先端部から
噴射されるようになつている。 Conventionally, an open gate type mold for injection molding structures such as plastics has been constructed as shown in FIG. In the figure, 1, 1 is a sprue, which is fitted into the manifold 2, and the flow of resin injected from the nozzle touch 3 passes through a predetermined path and is injected from the tip by vertical sliding of the torpedo 4. ing.
このとき、マニホールド２は常時ヒータ５によ
り所定の温度に加温されており、ノズルタツチ３
から通路を介して流れる樹脂をスプルー１，１を
含めて射出成形温度に保温している。 At this time, the manifold 2 is constantly heated to a predetermined temperature by the heater 5, and the nozzle touch 3
The resin flowing through the passage including the sprues 1, 1 is kept at the injection molding temperature.
ところが、マニホールド２に嵌着されているス
プルー１，１が長くなつたとき、マニホールド２
からの熱伝導だけでは満足できる成形温度が保持
できないので外部から加熱しなければならず、バ
ンドヒータ６等により補足加熱してやらなければ
ならないという問題があつた。 However, when the sprues 1, 1 fitted to the manifold 2 become longer, the manifold 2
Since a satisfactory molding temperature cannot be maintained by heat conduction alone, heating must be performed from the outside, and there is a problem in that supplementary heating must be performed using a band heater 6 or the like.
また、スプルー１，１がマニホールド２に嵌着
しているために、マニホールド２の加熱による熱
膨張の影響を受け易く、樹脂流の洩出が起る等の
問題もあつた。 Further, since the sprues 1, 1 are fitted into the manifold 2, they are easily affected by thermal expansion due to heating of the manifold 2, resulting in problems such as leakage of resin flow.
この発明は、上述した従来の問題を解決するた
めになされたものであり、マニホールドに嵌着し
たスプルーブツシユ内のトピード外周部にカート
リツジヒータを装着し、トピード及び樹脂流の成
形温度を所定温度に保持するよう構成した射出成
形用金型のゲートシステムを提供するものであ
る。 This invention was made in order to solve the above-mentioned conventional problems, and a cartridge heater is attached to the outer periphery of the torpedo in the sprue bush fitted to the manifold, and the molding temperature of the torpedo and resin flow is controlled at a predetermined temperature. An injection mold gating system configured to maintain a temperature is provided.
以下、この発明による一実施例を第２図ないし
第４図にもとづいて具体的に説明する。図におい
て従来例と対応する箇所及び部品は同一符号を付
して説明する。第２図はこの発明による要部の断
面図であり、スプルー１はマニホールド２に嵌着
されており、ノズルタツチ３から樹脂の通路２ａ
及びスプルーブツシユ１ａの通路１ｂを介してス
プルー１のノズルから射出されるものである。 Hereinafter, one embodiment of the present invention will be explained in detail based on FIGS. 2 to 4. In the drawings, parts and parts corresponding to those of the conventional example will be described with the same reference numerals. FIG. 2 is a sectional view of the main parts according to the present invention, in which the sprue 1 is fitted into the manifold 2, and the resin passage 2a is connected to the nozzle touch 3.
and is injected from the nozzle of the sprue 1 through the passage 1b of the sprue bush 1a.
トピード４はノズルのゲートをシールするもの
で、エアーシリンダー（図示せず）からの空気圧
等により、成形時の射出時には上昇後退してゲー
トを開き、射出完了と同時にゲートを閉じる如く
摺動又は固定自在に装着されている。また７はプ
ラスチツクの構造物Ａを成形するキヤビテイ、８
はコアーである。 The torpedo 4 seals the gate of the nozzle, and uses air pressure from an air cylinder (not shown) to rise and retreat during injection during molding to open the gate, and then slides or fixes to close the gate when injection is complete. It is attached freely. 7 is a cavity for molding the plastic structure A; 8
is the core.
第３図は、第２図の要部であるスプルー１の拡
大図であり、スプルー１のスプルーブツシユ１ａ
内には中空状のカートリツジヒータ１０が組込ま
れている。上記カートリツジヒータ１０は、鉄又
は非金属系の部材からなる本体１１の中央にはト
ピード４が挿入される貫通孔１１ａが形成され、
この貫通孔１１ａの外周部には、有底の円環状溝
１１ｂが形成されている。 FIG. 3 is an enlarged view of the sprue 1, which is the main part of FIG. 2, and shows the sprue bush 1a of the sprue 1.
A hollow cartridge heater 10 is incorporated inside. In the cartridge heater 10, a through hole 11a into which the torpedo 4 is inserted is formed in the center of the main body 11 made of iron or non-metallic material,
A bottomed annular groove 11b is formed on the outer periphery of the through hole 11a.
上記本体１１の円環状溝１１ｂ内には絶縁材１
２を介してヒータ等の電気発熱体１３が密封対態
に装着され、リード線１４を介して所定の電源に
接続されている。 An insulating material 1 is provided in the annular groove 11b of the main body 11.
An electric heating element 13 such as a heater is mounted in a sealed manner via 2, and is connected to a predetermined power source via a lead wire 14.
上述したように構成された中空状のカートリツ
ジヒータ１０は、スプルー１の長さに合わせて最
適長さに設計されるものであり、スプルー１を長
くする必要がある場合には、基本設計を何ら変え
る事なく最適長さに設定できるものである。 The hollow cartridge heater 10 configured as described above is designed to have an optimal length according to the length of the sprue 1, and if it is necessary to lengthen the sprue 1, the basic design can be changed. It can be set to the optimum length without making any changes.
以上詳細に説明したように、この発明による射
出成形用金型のゲートシステムは、マニホールド
に嵌着されたスプルーの内部に、トピードを容易
に組み込むことができる貫通孔を設けた中空状の
カートリツジヒータを装着したので、このヒータ
によりトピードはもちろん外周部を流れる樹脂を
所定の成形温度に保持することができるものであ
る。しかも、カートリツジヒータはコンパクトで
あり、スプルーの長さによつて最適長さに設定で
きるものであり、マニホールドとの関連がないの
で、マニホールドの加熱による熱影響を受けない
ものであるから、スプルーの嵌着部から樹脂の洩
出などが起らない等の効果を奏する。 As explained in detail above, the gate system for an injection mold according to the present invention has a hollow cartridge provided with a through hole in which a torpedo can be easily installed inside a sprue fitted into a manifold. Since a heater is installed, this heater can maintain not only the torpedo but also the resin flowing around the outer periphery at a predetermined molding temperature. Furthermore, the cartridge heater is compact and can be set to the optimum length depending on the length of the sprue, and since it is not connected to the manifold, it is not affected by heat from the heating of the manifold. This has the advantage of preventing resin from leaking from the fitting part.
従つて、従来例の如く、スプルーを長くした場
合に使用していたバンドヒータ等の補足加熱が必
要なく、安定した成形体の射出成形がなされる等
工業上の利得がある。 Therefore, there is no need for supplementary heating such as a band heater used when the sprue is lengthened as in the conventional example, and there are industrial advantages such as stable injection molding of a molded product.
第１図は従来の実施例を示す要部の断面図、第
２図はこの発明による実施例を示す要部の断面
図、第３図は第２図の要部を示す拡大断面図、第
４図は第３図のＡ―Ａ線断面図である。
１…スプルー、１ａ…スプルーブツシユ、２…
マニホールド、４…トピード、１０…カートリツ
ジヒータ、１１…本体、１１ａ…貫通孔、１１ｂ
…円環状溝、１２…絶縁材、１３…電気発熱体。
1 is a sectional view of the main part showing a conventional embodiment, FIG. 2 is a sectional view of the main part showing an embodiment according to the present invention, FIG. 3 is an enlarged sectional view of the main part of FIG. FIG. 4 is a sectional view taken along line AA in FIG. 3. 1... Sprue, 1a... Sprue bush, 2...
Manifold, 4... Torpedo, 10... Cartridge heater, 11... Main body, 11a... Through hole, 11b
...Annular groove, 12...Insulating material, 13...Electric heating element.
Claims (1)
ピードの管通孔を設けるとともに、この貫通孔の
外周部に有底の円環状溝を設け、上記円環状溝内
に絶縁材を介してヒータ等の電気発熱体を密封状
態に装着して中空状のカートリツジヒータを構成
し、上記カートリツジヒータをマニホールドに嵌
着したスプルーブツシユ内に組込んだことを特徴
とする射出成形用金型のゲートシステム。1 A torpedo tube passage hole for opening and closing the nozzle gate is provided in the center of the main body, and a bottomed annular groove is provided on the outer periphery of this through hole, and a heater, etc. is inserted into the annular groove through an insulating material. A hollow cartridge heater is constructed by sealingly mounting an electric heating element, and the cartridge heater is incorporated into a sprue bush fitted into a manifold. gate system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2240181A JPS57137126A (en) | 1981-02-18 | 1981-02-18 | Gate system of mold for injection molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2240181A JPS57137126A (en) | 1981-02-18 | 1981-02-18 | Gate system of mold for injection molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57137126A JPS57137126A (en) | 1982-08-24 |
| JPS6141285B2 true JPS6141285B2 (en) | 1986-09-13 |
Family
ID=12081635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2240181A Granted JPS57137126A (en) | 1981-02-18 | 1981-02-18 | Gate system of mold for injection molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57137126A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2730309B2 (en) * | 1991-03-26 | 1998-03-25 | 三菱マテリアル株式会社 | Injection mold |
| US6328554B1 (en) * | 1999-07-07 | 2001-12-11 | Husky Injection Molding System, Ltd. | Valve gating arrangement for an insulated runner |
-
1981
- 1981-02-18 JP JP2240181A patent/JPS57137126A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57137126A (en) | 1982-08-24 |
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