JP3052603U - Nozzle part of injection molding machine - Google Patents

Nozzle part of injection molding machine

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Publication number
JP3052603U
JP3052603U JP1998000923U JP92398U JP3052603U JP 3052603 U JP3052603 U JP 3052603U JP 1998000923 U JP1998000923 U JP 1998000923U JP 92398 U JP92398 U JP 92398U JP 3052603 U JP3052603 U JP 3052603U
Authority
JP
Japan
Prior art keywords
nozzle
face
tip
gap
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 - Lifetime
Application number
JP1998000923U
Other languages
Japanese (ja)
Inventor
洋典 小山
Original Assignee
株式会社名機製作所
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 株式会社名機製作所 filed Critical 株式会社名機製作所
Priority to JP1998000923U priority Critical patent/JP3052603U/en
Application granted granted Critical
Publication of JP3052603U publication Critical patent/JP3052603U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

(57)【要約】 【課題】 ノズル先端部の温度が低下すると、ショート
ショットや糸引き等の成形不良の他、樹脂替え・色替え
にも支障を来す。 【解決手段】 加熱筒先端面に螺着したノズルと、ノズ
ル端面とノズルチップ端面間に間隙が生ずるようにノズ
ルの端面に螺着したノズルチップと、該間隙の寸法より
も僅か厚い所定厚さを有し前記間隙に狭持されるヒータ
からなるノズル部とした。
(57) [Summary] [Problem] When the temperature at the tip of a nozzle is lowered, not only molding defects such as short shots and stringing but also troubles in resin change and color change are caused. SOLUTION: A nozzle screwed to a front end face of a heating cylinder, a nozzle tip screwed to an end face of the nozzle so that a gap is formed between the nozzle end face and the nozzle tip end face, and a predetermined thickness slightly larger than the size of the gap And a nozzle portion comprising a heater held in the gap.

Description

【考案の詳細な説明】[Detailed description of the invention]

【0001】[0001]

【考案の属する技術分野】[Technical field to which the invention belongs]

射出成形機のノズル部の温度制御構造に関する。 The present invention relates to a temperature control structure of a nozzle portion of an injection molding machine.

【0002】[0002]

【従来の技術】[Prior art]

射出成形機のノズル部は溶融樹脂を金型内に充填するため、その先端を金型に 押圧する。金型は充填された溶融樹脂を冷却するためノズル部よりも低い温度に 設定している。しかもノズル部は金型に比較して熱容量が極端に小さいので、ノ ズル部の温度を設定した適正温度に維持することは極めて困難であった。このよ うなノズル温度低下を補償する手段としては、ヒータを装備することであるが、 ノズルチップは小さい部材でありヒータの装着は困難であった。また実開昭55 −102521に開示するように、ノズルとノズルチップとの間隙に熱伝導の良 好なワッシャを挿入することも試みたが、ノズル側からの熱伝導のみでは十分で はなかった。 The nozzle of the injection molding machine presses its tip against the mold in order to fill the mold with the molten resin. The mold is set at a lower temperature than the nozzle to cool the filled molten resin. Moreover, since the heat capacity of the nozzle portion is extremely smaller than that of the mold, it has been extremely difficult to maintain the temperature of the nozzle portion at the set appropriate temperature. A means for compensating for such a decrease in the nozzle temperature is to equip a heater, but the nozzle tip is a small member and it is difficult to mount the heater. Further, as disclosed in Japanese Utility Model Laid-Open No. 55-102521, an attempt was made to insert a washer having good heat conduction into the gap between the nozzle and the nozzle tip, but heat conduction from the nozzle side alone was not sufficient. .

【0003】[0003]

【考案が解決しようとする課題】[Problems to be solved by the invention]

このように、ノズル部温度が低下すると、ノズル部先端の樹脂通路内で溶融樹 脂が固化して樹脂通路を塞ぎ、ショートショット等の成形不良が惹起される。ま た、ノズル部温度の低下を補おうとして温度制御装置がノズル部のバンドヒータ に最大電力を出力することにより、ノズル部の温度は設定値を越して上昇するこ とがあり、ノズル部先端でスプルが切断されず糸引きが発生して成形品の表面不 良や金型損傷につながる。さらに、ノズル部の温度低下により、先端部樹脂通路 壁面に樹脂が残留して、樹脂替え・色替えに多くの時間を要することがある。 As described above, when the temperature of the nozzle portion decreases, the molten resin solidifies in the resin passage at the tip of the nozzle portion and closes the resin passage, thereby causing molding defects such as short shots. In addition, when the temperature controller outputs the maximum power to the band heater of the nozzle to compensate for the drop in the temperature of the nozzle, the temperature of the nozzle may rise above the set value, and the temperature of the nozzle may rise. This does not cut the sprue and causes stringing, leading to defective molded product surfaces and mold damage. Further, the temperature of the nozzle portion may decrease, so that the resin may remain on the wall surface of the resin passage at the tip end, and it may take a long time to change the resin or change the color.

【0004】[0004]

【課題を解決するための手段】[Means for Solving the Problems]

上記課題を解決するため、加熱筒先端面に螺着したノズルと、ノズル端面とノ ズルチップ端面間に間隙が生じるようにノズルの端面に螺着したノズルチップと 、該間隙の寸法よりも僅か厚い所定厚さを有し前記間隙に狭持されるヒータを備 え、さらに必要に応じて、ヒータの片面に断熱材を積層したのである。 In order to solve the above-mentioned problem, a nozzle screwed to the front end surface of the heating cylinder, a nozzle tip screwed to the nozzle end surface so as to form a gap between the nozzle end surface and the nozzle tip end surface, and a slightly thicker than the dimension of the gap A heater having a predetermined thickness and held in the gap was provided, and a heat insulating material was laminated on one side of the heater as needed.

【0005】[0005]

【考案の実施の形態】[Embodiment of the invention]

図1に基づき本考案の実施の形態を詳細に説明する。加熱筒6の先端面には中 心に樹脂通路9を有する筒状のノズル4が螺着され、その外周にはバンドヒータ 5が捲着してある。該ノズル4のノズル端面8にはノズルチップ1がその雄螺子 端面がノズル4の雌螺子底部端面に密着するように螺着され、樹脂通路9が滑ら かに連通するようにしている。この状態において、ノズルチップ端面7とノズル 端面8の間には間隙が生じる。ところで、ノズル4とノズルチップ1によりノズ ル部12が構成されるが、本来ノズルチップ1はノズル4と一体で構成可能であ る。しかしながら、ノズル先端部は図示しない金型への押圧により損傷を受け易 いので、その部分のみ交換容易とするため、ノズルチップとして別部材に構成し たのである。 An embodiment of the present invention will be described in detail with reference to FIG. A cylindrical nozzle 4 having a resin passage 9 at its center is screwed to the front end surface of the heating cylinder 6, and a band heater 5 is wound around its outer periphery. The nozzle tip 1 is screwed to the nozzle end face 8 of the nozzle 4 so that the male screw end face is in close contact with the female screw bottom end face of the nozzle 4 so that the resin passage 9 is smoothly communicated. In this state, a gap is formed between the nozzle tip end face 7 and the nozzle end face 8. By the way, although the nozzle part 12 is constituted by the nozzle 4 and the nozzle tip 1, the nozzle tip 1 can be constituted integrally with the nozzle 4 originally. However, since the tip of the nozzle is easily damaged by pressing against a mold (not shown), the nozzle tip is formed as a separate member as a nozzle tip to facilitate replacement.

【0006】 ノズルチップ端面7とノズル端面8の間の前記間隙は実施の形態では数mmで あり、該間隙の寸法より僅かに厚い(0.1mm程度)所定厚さの円板環状のヒ ータ2をノズルチップ1の雄螺子に嵌挿した後、ノズルチップ1の該雄螺子をノ ズル4の雌螺子に螺合してノズルチップ1をノズル4に螺着する。こうしてヒー タ2は前記間隙に狭持される。ヒータ2は窒化アルミヒータ等が好ましく、その 端面から電熱線導線10および電熱線の温度検出のための熱電対導線11が引き 出されている。これらの導線は図示しない温度制御装置に接続されヒータ2の温 度制御を行う。The gap between the nozzle tip end face 7 and the nozzle end face 8 is several mm in the embodiment, and is slightly thicker than the gap (about 0.1 mm). After the nozzle 2 is inserted into the male screw of the nozzle tip 1, the male screw of the nozzle tip 1 is screwed to the female screw of the nozzle 4, and the nozzle tip 1 is screwed to the nozzle 4. Thus, the heater 2 is held in the gap. The heater 2 is preferably an aluminum nitride heater or the like. A heating wire 10 and a thermocouple wire 11 for detecting the temperature of the heating wire are drawn out from the end face. These conductors are connected to a temperature control device (not shown) to control the temperature of the heater 2.

【0007】 3は、厚さ以外はヒータ2と略同一の形状を有する断熱材であり、必要に応じ てノズル4側に着脱する。断熱材3に替えて金属製のワッシャ類をヒータ2の片 面または両面に積層することもある。いずれにしても、ヒータ2とともに積層す る部材の厚さの合計が前記所定厚さとなるようにする。Reference numeral 3 denotes a heat insulating material having substantially the same shape as the heater 2 except for the thickness, and is attached to and detached from the nozzle 4 as necessary. In place of the heat insulating material 3, metal washers may be laminated on one or both sides of the heater 2. In any case, the total thickness of the members stacked together with the heater 2 is set to the predetermined thickness.

【0008】[0008]

【考案の効果】 上記のように構成したことにより、ノズルチップ部分の温度調節が簡単にしか も小容積で実現して、ショートショットや糸引き等の成形不良を防止出来る。ま た、ノズルチップのみ昇温して樹脂通路内の残留樹脂を素早く排出出来るので、 樹脂替え色替えが容易となる。このとき断熱材をノズル側に置けばノズルチップ のみ昇温する効果が増大するのである。[Effects of the Invention] With the above configuration, the temperature of the nozzle tip can be easily adjusted with a small volume, and molding defects such as short shot and stringing can be prevented. In addition, since only the nozzle tip is heated and the residual resin in the resin passage can be quickly discharged, the color change of the resin can be easily performed. At this time, if the heat insulating material is placed on the nozzle side, the effect of increasing the temperature of only the nozzle tip increases.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本考案のノズル部を示す部分断面図である。FIG. 1 is a partial cross-sectional view showing a nozzle unit of the present invention.

【符号の説明】[Explanation of symbols]

1 ‥‥‥ ノズルチップ 2 ‥‥‥ ヒータ 3 ‥‥‥ 断熱材 4 ‥‥‥ ノズル 5 ‥‥‥ バンドヒータ 6 ‥‥‥ 加熱筒 7 ‥‥‥ ノズルチップ端面 8 ‥‥‥ ノズル端面 9 ‥‥‥ 樹脂通路 10 ‥‥ 電熱線導線 11 ‥‥ 熱電対導線 12 ‥‥ ノズル部 1 ‥‥‥ Nozzle tip 2 ヒ ー タ Heater 3 断 熱 Insulation material 4 ‥‥‥ Nozzle 5 ‥‥‥ Band heater 6 ‥‥‥ Heating cylinder 7 ノ ズ ル Nozzle tip end face 8 ‥‥‥ Nozzle end face 9 ‥‥樹脂 Resin passage 10 電 Heating wire 11 ‥‥ Thermocouple wire 12 ノ ズ ル Nozzle

─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───

【手続補正書】[Procedure amendment]

【提出日】平成10年4月17日[Submission date] April 17, 1998

【手続補正1】[Procedure amendment 1]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】請求項2[Correction target item name] Claim 2

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

Claims (2)

【実用新案登録請求の範囲】[Utility model registration claims] 【請求項1】 加熱筒先端面に螺着したノズルと、ノズ
ル端面とノズルチップ端面間に間隙が生じるようにノズ
ルの端面に螺着したノズルチップと、該間隙に狭持され
るヒータよりなる射出成形機のノズル部。
1. A nozzle, which is screwed to a front end face of a heating cylinder, a nozzle tip which is screwed to an end face of a nozzle so as to form a gap between the nozzle end face and the nozzle tip end face, and a heater which is held in the gap. Nozzle part of injection molding machine.
【請求項2】 請求項1におけるヒータは、一方の面に
断熱材を積層したことを特徴とする射出成形機のノズル
部。
2. The nozzle part of an injection molding machine according to claim 1, wherein the heater has a heat insulating material laminated on one surface.
JP1998000923U 1998-02-10 1998-02-10 Nozzle part of injection molding machine Expired - Lifetime JP3052603U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1998000923U JP3052603U (en) 1998-02-10 1998-02-10 Nozzle part of injection molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1998000923U JP3052603U (en) 1998-02-10 1998-02-10 Nozzle part of injection molding machine

Publications (1)

Publication Number Publication Date
JP3052603U true JP3052603U (en) 1998-09-29

Family

ID=43186714

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1998000923U Expired - Lifetime JP3052603U (en) 1998-02-10 1998-02-10 Nozzle part of injection molding machine

Country Status (1)

Country Link
JP (1) JP3052603U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0649943U (en) * 1992-10-15 1994-07-08 沖電気工業株式会社 Gear mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0649943U (en) * 1992-10-15 1994-07-08 沖電気工業株式会社 Gear mechanism

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