JPH0441213A - Injection nozzle - Google Patents

Injection nozzle

Info

Publication number
JPH0441213A
JPH0441213A JP14946690A JP14946690A JPH0441213A JP H0441213 A JPH0441213 A JP H0441213A JP 14946690 A JP14946690 A JP 14946690A JP 14946690 A JP14946690 A JP 14946690A JP H0441213 A JPH0441213 A JP H0441213A
Authority
JP
Japan
Prior art keywords
nozzle
heater
nozzle body
protective cover
ring nut
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
Application number
JP14946690A
Other languages
Japanese (ja)
Other versions
JP2610195B2 (en
Inventor
Wataru Shiraishi
亘 白石
Toshio Ishiguro
俊夫 石黒
Tetsuya Okuno
哲也 奥野
Satoshi Takatsugi
聡 高次
Norihisa Miyauchi
宮内 徳久
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fanuc Corp
Original Assignee
Fanuc Corp
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 Fanuc Corp filed Critical Fanuc Corp
Priority to JP2149466A priority Critical patent/JP2610195B2/en
Publication of JPH0441213A publication Critical patent/JPH0441213A/en
Application granted granted Critical
Publication of JP2610195B2 publication Critical patent/JP2610195B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/72Heating or cooling
    • B29C45/74Heating or cooling of the injection unit

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To prevent the intrusion of a resin into a heater, and to mount and dismount a nozzle heater and a nozzle body smoothly by screwing a ring nut with the nozzle body from the front, abutting the nozzle body against the front end of the cylindrical cover of the heater and hermetically sealing the clearance of a cover at the front end of the cylindrical protective cover and the nozzle body. CONSTITUTION:An injection nozzle 9 is assembled in such a manner that a nozzle heater 1 is inserted to the mounting section (l) of a nozzle body 5, the rear end of a protective cover 7 for the nozzle heater 1 is abutted against a stepped section 14, a ring nut 11 is screwed with a screw section 13 from the front of the nozzle body 5, the rear surface of the screw section 13 is abutted against the front end of the protective cover 7, and the nozzle heater 1 is held between the screw section 13 and the stepped section 14 and fixed. Consequently, the nozzle heater 1 is set up positively, and the clearance 17 of the cover 7 and the nozzle body 5 at the front end section of the protective cover 7 is hermetically sealed. Accordingly, a molding resin does not penetrate into the protective cover 7. Since the ring nut 11 is fitted to the nozzle body 5 by screwing, the ring nut is mounted and dismounted simply.

Description

【発明の詳細な説明】 産業上の利用分野 この発明は射出成形機における射出ノズルの構造に関す
る。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to the structure of an injection nozzle in an injection molding machine.

従来技術 射出成形機における射出ノズルは、射出ユニットのシリ
ンダアッセンブリ先端に取付けられて、型締ユニットに
装着された金型のロケートリングと対向する。また、射
出ノズルはノズル本体とその外周に装着されたノズルヒ
ーターとからなり、ノズルヒーターはノズル本体を加熱
すること゛こより、射出ノズル部分で樹脂の流動性が低
下するのを防止するためのものである。また、このヒー
ターはノズル本体の交換が可能なようにノズル本体に対
して着脱自在となっている。
The injection nozzle in a conventional injection molding machine is attached to the tip of a cylinder assembly of an injection unit and faces a locate ring of a mold attached to a mold clamping unit. In addition, the injection nozzle consists of a nozzle body and a nozzle heater attached to its outer periphery.The nozzle heater heats the nozzle body, thereby preventing the fluidity of the resin from decreasing at the injection nozzle part. It is. Further, this heater is detachable from the nozzle body so that the nozzle body can be replaced.

ノズルヒーター1は第3図のように2枚の板体2.3間
にヒーター線4を絶縁体と共に配置して帯状に形成し、
これをノズル本体5の外周に巻き付けた後、帯状体の両
端におけるフランジ部をボルト6などで固定して取付け
るバンド型と、第4゜5図のように円筒状保護カバー7
の内面にシースヒーター線8をコイル状に配置してノズ
ルヒーター1を形成し、これをノズル本体5に嵌挿して
線状のシースヒーター8を直接にノズル本体5の外周面
に接触させる直巻型がある。
As shown in FIG. 3, the nozzle heater 1 is formed into a band shape by placing a heater wire 4 together with an insulator between two plates 2 and 3.
After wrapping this around the outer periphery of the nozzle body 5, the flanges at both ends of the band are fixed with bolts 6, etc., and the band type is attached.As shown in FIG.
The nozzle heater 1 is formed by arranging the sheath heater wire 8 in a coil shape on the inner surface of the nozzle body 5, and this is inserted into the nozzle body 5, so that the linear sheath heater 8 is brought into direct contact with the outer peripheral surface of the nozzle body 5. There is a type.

バンド型は脱着が比較的簡単であるが、固定のためのフ
ランジなどがあるので全体としての径が大きくなり、金
型におけるロケートリングが小さかったり、深い場合に
適当でない。この点、直巻型のノズルヒーターは小型の
金型に適している。
The band type is relatively easy to attach and detach, but since it has a flange for fixing, the overall diameter becomes large, making it unsuitable if the locate ring in the mold is small or deep. In this respect, the direct-wound nozzle heater is suitable for small molds.

なお、符号9は全体としての射出ノズルを示している。Note that the reference numeral 9 indicates the injection nozzle as a whole.

ノズル本体5は樹脂の種類や成形品に応じて交換される
が、ノズルヒーター1は、通常、射出ユニットに備え付
けのものをそのまま用いる。そのために交換可能になっ
ているのであるが、直巻型の場合、ヒーター装着上の便
宜から、円筒状の保護カバー7の前端においてノズル本
体5との間に間隙が存在する。
Although the nozzle main body 5 is replaced depending on the type of resin and the molded product, the nozzle heater 1 is usually used as is, provided in the injection unit. For this reason, it is replaceable, but in the case of a direct-wound type, a gap exists between the front end of the cylindrical protective cover 7 and the nozzle body 5 for convenience in mounting the heater.

一方、金型の構造や成形する樹脂の特性によって、次回
射出までの間に金型のスプルー内に残された樹脂の硬化
が進行するのを好まない成形工程では、−度の射出毎に
ノズルタッチ及びその解除を繰り返す。しかし、樹脂の
計量後にノズルタッチを解除する時、ノズル本体5内部
の樹脂圧が高く、ノズル先端から若干の樹脂が漏れるこ
とがある。そしてこの樹脂が次のノズルタッチの際に潰
されて後方におくられ、このような事態を繰り返すうち
に漏れた樹脂10がついにノズルヒーター1の前端に達
する(第5図)。
On the other hand, depending on the structure of the mold and the characteristics of the resin to be molded, in a molding process where it is preferable that the resin remaining in the sprue of the mold progresses until the next injection, the nozzle is Repeat the touch and release. However, when the nozzle touch is released after measuring the resin, the resin pressure inside the nozzle body 5 is high, and some resin may leak from the nozzle tip. This resin is then crushed and sent to the rear when the nozzle is next touched, and as this situation is repeated, the leaked resin 10 finally reaches the front end of the nozzle heater 1 (FIG. 5).

すると、樹脂は前記の保護カバー7とノズル本体5との
間から内部に入り込み、そこで高熱のために分解変質し
て固化し、シースヒーター線8をノズル本体5に固定し
た形となる。
Then, the resin enters the inside from between the protective cover 7 and the nozzle body 5, where it decomposes and changes in quality due to high heat and solidifies, so that the sheathed heater wire 8 is fixed to the nozzle body 5.

このために、ノズル本体5の交換に手間を要したり、無
理に取り外そうとする結果、ノズルヒーターを破損して
しまうことがあった。
For this reason, replacing the nozzle body 5 requires time and effort, and as a result of trying to remove it by force, the nozzle heater may be damaged.

発明が解決しようとする課題 この発明は、樹脂の侵入がなくノズル本体の交換を簡単
に行なえる、直巻型ノズルヒーターを備えた射出ノズル
の提供を課題とする。
Problems to be Solved by the Invention An object of the present invention is to provide an injection nozzle equipped with a series-wound nozzle heater, which prevents resin from entering and allows easy replacement of the nozzle body.

課題を解決するための手段 射出ノズルを、ノズル本体、円筒状の保護カバーを備え
た直巻型ノズルヒーターおよびノズル本体に螺合される
リングナツトを備えたものとする。
Means for Solving the Problems An injection nozzle is provided with a nozzle body, a series nozzle heater having a cylindrical protective cover, and a ring nut screwed onto the nozzle body.

ノズル本体に前記のヒーターを装着し、リングナツトを
前方からノズル本体に螺合して、これを前記ヒーターの
円筒状カバーの前端に当接して、円筒状保護カバーの前
端における該カバーとノズル本体との間隙を密閉する。
The heater is attached to the nozzle body, and a ring nut is screwed onto the nozzle body from the front, and this is brought into contact with the front end of the cylindrical cover of the heater to connect the cover and the nozzle body at the front end of the cylindrical protective cover. Seal the gap.

作用 ノズルヒーターはノズル本体を樹脂の射出に適正な温度
に維持する。
The active nozzle heater maintains the nozzle body at the proper temperature for resin injection.

ノズルヒーターの円筒状保護カバーはヒーター線に異物
が接触して損傷するのを防止する。
The cylindrical protective cover of the nozzle heater prevents foreign objects from contacting and damaging the heater wire.

リングナツトは円筒状保護カバーとノズル本体間に樹脂
が侵入するのを防止する。
The ring nut prevents resin from entering between the cylindrical protective cover and the nozzle body.

実施例 第1,2図において、射出ノズル9はノズルヒーター1
、ノズル本体5、熱電対18およびリングナツト11を
備える。
Embodiment In FIGS. 1 and 2, the injection nozzle 9 is the nozzle heater 1.
, a nozzle body 5, a thermocouple 18, and a ring nut 11.

ノズルヒーター1は直巻型でコイル状にまかれたシース
ヒーター線8が円筒状の保護カバー7で保護された構造
となっている。
The nozzle heater 1 has a structure in which a sheathed heater wire 8 wound in a coil shape is protected by a cylindrical protective cover 7.

ノズル本体5は後端部がシリンダ側に固定するためのフ
ランジ12に形成され、先端部にリングナツト11と螺
合するねじ部13が形成されている。また、ねじ部13
とフランジ12の間がノズルヒーター1の装着部lとさ
れ、この部分lはノズルヒーター1の前後方向長さより
若干短く、また、その後端は前記の保護カバー7の後端
が当接する段差面14に形成されている。
The nozzle main body 5 has a rear end formed into a flange 12 for fixing to the cylinder side, and a threaded part 13 to be screwed into a ring nut 11 formed at the tip. In addition, the threaded portion 13
The space between the and flange 12 is the mounting part l of the nozzle heater 1, and this part l is slightly shorter than the length of the nozzle heater 1 in the front-rear direction. is formed.

ねじ部13の径は装着部lの径より小さい。The diameter of the threaded portion 13 is smaller than the diameter of the mounting portion l.

リングナツト11はねじ部13に螺合する雌ねじ15を
備え、外径が保護カバー7の外径より少し大きい偏平な
ナツトであり、工具により締め付けが可能なように外形
に工具掛は部(図示していない)を有する。
The ring nut 11 is a flat nut with an outer diameter slightly larger than the outer diameter of the protective cover 7, and has a female thread 15 that is screwed into the threaded part 13. ).

フランジ12の部分における符号16は固定用のボルト
を挿通する孔である。
Reference numeral 16 in the flange 12 is a hole through which a fixing bolt is inserted.

射出ノズル9は、ノズル本体5の装着部lにノズルヒー
ター1を嵌挿してその保護カバー7の後端を段差部14
に当接させた後、ノズル本体5の前方からリングナツト
11をねじ部13に螺合し、その後面を前記保護カバー
7の前端に突き当て、前記の段差部14との間でノズル
ヒーター1を挟みつけるようにして固定することにより
、組み立てられる。
The injection nozzle 9 is constructed by inserting the nozzle heater 1 into the mounting part l of the nozzle body 5 and attaching the rear end of the protective cover 7 to the stepped part 14.
After the ring nut 11 is screwed onto the threaded part 13 from the front of the nozzle body 5, the rear surface is brought into contact with the front end of the protective cover 7, and the nozzle heater 1 is inserted between it and the stepped part 14. It can be assembled by pinching and fixing.

これにより、ノズルヒーター1が確実に取付けられると
共に、保護カバー7の前端部における該カバー7とノズ
ル本体5との間隙17が密閉される。
Thereby, the nozzle heater 1 is reliably attached, and the gap 17 between the cover 7 and the nozzle body 5 at the front end of the protective cover 7 is sealed.

したがって、射出成形機の稼働中に成形用の樹脂がノズ
ル先端からノズルヒーター1の個所に移動してくるよう
なことがあっても、その樹脂が保護カバー7の内部に入
り込むことはない。
Therefore, even if molding resin moves from the nozzle tip to the nozzle heater 1 during operation of the injection molding machine, the resin will not enter the inside of the protective cover 7.

また、リングナツト11はノズル本体5に螺合によって
取付けられるから、脱着が簡単である。
Further, since the ring nut 11 is attached to the nozzle body 5 by screwing, it is easy to attach and detach.

以上は実施例である。The above are examples.

ねじ部13は装着部オの径と同じに構成することもでき
る。
The threaded portion 13 can also be configured to have the same diameter as the mounting portion O.

発明の効果 直巻型ノズルヒーターを備えた射出ノズルにおいて、該
ヒーター内部への樹脂の侵入がないのでノズルヒーター
とノズル本体間の脱着を常に円滑に、簡単に行なえる。
Effects of the Invention In an injection nozzle equipped with a direct-wound nozzle heater, since there is no resin intrusion into the inside of the heater, the nozzle heater and the nozzle body can always be smoothly and easily attached and detached.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は一部を分解して示す、断面による正面図、第2
図は断面による正面図、第3図は従来例の斜視図、第4
図は従来例の斜視図、第5図は従来例の断面による斜視
図である。 1・・・ノズルヒーター、5・・・ノズル本体、7・・
・円筒状保護カバー、9・・・射出ノズル、11・・・
リングナツト、13・・・ねじ部、17・・・間隙、1
8・・・熱電対。
Figure 1 is a partially exploded front view in section;
The figure is a front view in section, Figure 3 is a perspective view of the conventional example, and Figure 4 is a front view of the conventional example.
The figure is a perspective view of a conventional example, and FIG. 5 is a cross-sectional perspective view of the conventional example. 1... Nozzle heater, 5... Nozzle body, 7...
・Cylindrical protective cover, 9...injection nozzle, 11...
Ring nut, 13... Threaded portion, 17... Gap, 1
8...Thermocouple.

Claims (1)

【特許請求の範囲】[Claims] ノズル本体の外周に円筒状の保護カバーで保護された直
巻型ノズルヒーターが装着され、該ヒーターの円筒状保
護カバーの前端に、ノズル本体に前方から螺合されたリ
ングナットが当接して、保護カバーの前端における該カ
バーとノズル本体との間隙を密閉していることを特徴と
した射出ノズル。
A series nozzle heater protected by a cylindrical protective cover is mounted on the outer periphery of the nozzle body, and a ring nut screwed onto the nozzle body from the front abuts the front end of the cylindrical protective cover of the heater. An injection nozzle characterized in that a gap between the protective cover and the nozzle body at the front end of the protective cover is sealed.
JP2149466A 1990-06-07 1990-06-07 Injection nozzle Expired - Fee Related JP2610195B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2149466A JP2610195B2 (en) 1990-06-07 1990-06-07 Injection nozzle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2149466A JP2610195B2 (en) 1990-06-07 1990-06-07 Injection nozzle

Publications (2)

Publication Number Publication Date
JPH0441213A true JPH0441213A (en) 1992-02-12
JP2610195B2 JP2610195B2 (en) 1997-05-14

Family

ID=15475757

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2149466A Expired - Fee Related JP2610195B2 (en) 1990-06-07 1990-06-07 Injection nozzle

Country Status (1)

Country Link
JP (1) JP2610195B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06166077A (en) * 1992-11-27 1994-06-14 Nissei Plastics Ind Co Heating device for injection molding machine
JPH0740121U (en) * 1993-12-28 1995-07-18 住友重機械プラスチックマシナリー株式会社 Injection device
KR100671815B1 (en) * 2004-10-25 2007-01-19 김관표 Manufacturing method of single nozzle for injection molding machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102490332A (en) * 2011-12-06 2012-06-13 江森自控(芜湖)汽车饰件有限公司 Protective cover for injection molding machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06166077A (en) * 1992-11-27 1994-06-14 Nissei Plastics Ind Co Heating device for injection molding machine
JPH0740121U (en) * 1993-12-28 1995-07-18 住友重機械プラスチックマシナリー株式会社 Injection device
KR100671815B1 (en) * 2004-10-25 2007-01-19 김관표 Manufacturing method of single nozzle for injection molding machine

Also Published As

Publication number Publication date
JP2610195B2 (en) 1997-05-14

Similar Documents

Publication Publication Date Title
JP2588676B2 (en) Non-ceramic insulator forming equipment
US20140070454A1 (en) Die for insert molding and method for insert molding of collar
JPH0911279A (en) Nozzle for injection molding
JPH0441213A (en) Injection nozzle
US20090155405A1 (en) Injection-molding nozzle, in particular hot-runner nozzle, for an injector
US20120171321A1 (en) injection interface device
JP4693077B2 (en) Dust-proof protective cap for thin and thick pipes
JP2627846B2 (en) Injection unit
JP3502792B2 (en) Nozzle cover of metal injection molding machine
GB913631A (en) Improvements in or connected with musical drums
KR200205936Y1 (en) Thermal sensor for injection molding machine
WO2017094160A1 (en) Brake hose joint assembly
JPS60193625A (en) Nozzle for injector
US8561742B2 (en) Insert, plastic part assembly utilizing same and die-casting mold for making the insert
SU1212823A1 (en) Nozzle of thermoplastic casting machine
JPH0344647B2 (en)
CN216185437U (en) Steering gear ball pin protection architecture
CN105822651A (en) Base type nut and connection structure adopting same
JPS63254017A (en) Manufacture of plastic molded article having insert with male screw
JP3787831B2 (en) Manufacturing method of resin molded products
KR200152178Y1 (en) Insert bolt type mounting structure of vehicle bumper
JP2595159Y2 (en) Mounting structure of valve holder
JP2689159B2 (en) Method for manufacturing resin product with insert
JPS5853133Y2 (en) Plunger mounting device
JPH02221767A (en) Bellows and manufacturing metal mold thereof

Legal Events

Date Code Title Description
R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080213

Year of fee payment: 11

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090213

Year of fee payment: 12

LAPS Cancellation because of no payment of annual fees