JPS5914930A - Method of injection molding of insert rotor gear - Google Patents

Method of injection molding of insert rotor gear

Info

Publication number
JPS5914930A
JPS5914930A JP12333882A JP12333882A JPS5914930A JP S5914930 A JPS5914930 A JP S5914930A JP 12333882 A JP12333882 A JP 12333882A JP 12333882 A JP12333882 A JP 12333882A JP S5914930 A JPS5914930 A JP S5914930A
Authority
JP
Japan
Prior art keywords
magnet
mold
rotor gear
resin
injection molding
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
JP12333882A
Other languages
Japanese (ja)
Other versions
JPH0324327B2 (en
Inventor
Minoru Tanaka
稔 田中
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP12333882A priority Critical patent/JPS5914930A/en
Publication of JPS5914930A publication Critical patent/JPS5914930A/en
Publication of JPH0324327B2 publication Critical patent/JPH0324327B2/ja
Granted legal-status Critical Current

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
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14336—Coating a portion of the article, e.g. the edge of the article
    • B29C45/14344—Moulding in or through a hole in the article, e.g. outsert moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2015/00—Gear wheels or similar articles with grooves or projections, e.g. control knobs
    • B29L2015/003—Gears

Landscapes

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

Abstract

PURPOSE:To make it easy to insert a magnet into a mold and also make it easy to assemble a rotor gear, by providing a resin charging surface of the mold with a conical surface as a guide for the magnet, and allowing part of the conical surface to serve as a path for a molten resin. CONSTITUTION:In case the toroidal magnet is inserted in the mold, then the outer surface of the magnet is covered partly with the resin, and a rotor gear is produced by the insert injection molding method, the mold into which the magnet 3 will be introduced is provided with the conical section 6, which is allowed to serve as the feeding guide for the magnet 3 into the mold. When a plurality of rotor gears 4 are should be molded, the feeding can be considerably improved by the provision of the conical section 6. The conical section 6 also serves to facilitate the throwing of the resin. The outer circumference of the magnet 3 is partly covered with the resin so that the magnet 6 is positioned in place with respect to the rotor gear and the magnet 6 is prevented from being cracked.

Description

【発明の詳細な説明】 本発明はインサート射出成形法の改良に関する。[Detailed description of the invention] The present invention relates to improvements in insert injection molding processes.

本発明の目的は、インサートする磁石が金型に容易にイ
ンサート出来ることにある。An object of the present invention is that the magnet to be inserted can be easily inserted into a mold.

本発明の他の目的は、ロータ歯車の組込みに１倒れを少
なくし組立を容易にすることにある。Another object of the present invention is to reduce the amount of one fall when assembling a rotor gear, thereby facilitating assembly.

従来は、第１図に示す金型構造である。磁石３はロータ
歯車部材の中心軸からズしてはならない１− ので、磁石外径とインサートする金型の穴径はほぼ一致
している。そのため、磁石３を金型に給材セットすると
き、磁石３の中心軸とロータ部材４の中心軸を厳しく合
せ込まねば給材は出来ない欠点があった。The conventional mold structure is shown in FIG. Since the magnet 3 must not deviate from the center axis of the rotor gear member, the outer diameter of the magnet and the hole diameter of the mold into which it is inserted are approximately the same. Therefore, when setting the magnet 3 in the mold, the center axis of the magnet 3 and the center axis of the rotor member 4 must be precisely aligned to allow the material to be fed.

本発明はかかる欠点を除去したものであり、実施例を第
２図と第３図を用いて説明する。The present invention eliminates such drawbacks, and an embodiment thereof will be described with reference to FIGS. 2 and 3.

本発明の要旨は、第２図に示すように、磁石３を給材す
る金型に円錐部６を設け、該円錐部６が磁石３の給材ガ
イドの働きをすることにある。The gist of the present invention is that, as shown in FIG. 2, a conical part 6 is provided in the mold for feeding the magnet 3, and the conical part 6 functions as a material feeding guide for the magnet 3.

ロータ歯車部材４の成形は多数取シを行っている。The rotor gear member 4 is molded in multiple shapes.

そのため、磁石３の給材における性能と信頼性の向上が
不可欠であるが、円錐部６を設けることで、給材能力を
大巾に向上させている。Therefore, it is essential to improve the performance and reliability of the material feeding of the magnet 3, and by providing the conical portion 6, the material feeding ability is greatly improved.

また、円錐部６は成形時に樹脂口シを良くする働きがあ
る。磁石３の外周は部分的に樹脂で包み、磁石６のロー
タ歯車３に対する位置決めと、磁石６の割れ防止をして
いる。そのため、円錐部６を設けることにより、樹脂は
磁石３の中心方向と外周方向から流れることによシ、樹
脂の充填のバラ２− ンスが良くなシ、ロータ歯車部材４の品質が向上する。Further, the conical portion 6 has the function of improving the resin seal during molding. The outer periphery of the magnet 3 is partially wrapped with resin to position the magnet 6 with respect to the rotor gear 3 and to prevent the magnet 6 from cracking. Therefore, by providing the conical portion 6, the resin flows from the center direction and the outer circumferential direction of the magnet 3, which improves the balance of resin filling and improves the quality of the rotor gear member 4.

さらに、第３図に示す如く、ロータ歯車部材４が地板部
材７に給材されると、円錐部６がステータ８大の側面に
当シ、ロータ歯車部材４の倒れを少なくしている。よっ
て、受部材９を給材組立に際しても、ロータ歯車部材４
の　立件は優れ、組立は容易となる効果がある。Further, as shown in FIG. 3, when the rotor gear member 4 is fed to the base plate member 7, the conical portion 6 hits the side surface of the stator 8, thereby reducing the fall of the rotor gear member 4. Therefore, even when assembling the receiving member 9, the rotor gear member 4
This has the effect of making it easier to assemble.

以上の如く、本発明は工業上有益な発明であシ、インサ
ート射出成形以外にも応用されるものであシ、請求の範
囲を限定するものではない。As described above, the present invention is an industrially useful invention and can be applied to other fields than insert injection molding, and the scope of the claims is not limited thereto.

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

第１図は従来のインサート成形法による金型構造であシ
、第２図は本発明によるインサート成形法による金型構
造である。第３図は本発明によるロータ歯車部材を組込
む断面図である。 １・・・上型 ２・・・ビンポイントゲート ３・・・磁石 ３− ４・・・ロータ歯車部材 ５・・・下型 ６＠・・円錐部 ７・・・地板部材 ８・・・ステータ ９・・・受部材 以　　　上 出願人　株式会社諏訪精工舎 技理人　弁理士最　上　　務 ４− 第１図 商τ　２　「二FIG. 1 shows a mold structure using a conventional insert molding method, and FIG. 2 shows a mold structure using an insert molding method according to the present invention. FIG. 3 is a cross-sectional view of the rotor gear assembly according to the present invention. 1... Upper die 2... Bin point gate 3... Magnet 3- 4... Rotor gear member 5... Lower die 6@... Conical part 7... Base plate member 8... Stator 9...Receiving member and above Applicant Suwa Seikosha Co., Ltd. Engineer Patent Attorney Mogami 4- Figure 1 Commercial τ 2 "2

Claims (1)

【特許請求の範囲】[Claims] ドーナツ形状をした磁石を金型にインサートし、磁石の
外面を部分的に樹脂で包み、ロータ歯車を形成するイン
サート出成形において、金型のプラスチック充填面に磁
石のガイドとして円錐面を有するとともに前記円錐面を
樹脂の湯道の一部とするロータ歯車のインサート射出成
形法。In insert molding, in which a donut-shaped magnet is inserted into a mold and the outer surface of the magnet is partially wrapped with resin to form a rotor gear, the plastic filled surface of the mold has a conical surface as a guide for the magnet. An insert injection molding method for rotor gears in which the conical surface is part of the resin runner.
JP12333882A 1982-07-15 1982-07-15 Method of injection molding of insert rotor gear Granted JPS5914930A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12333882A JPS5914930A (en) 1982-07-15 1982-07-15 Method of injection molding of insert rotor gear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12333882A JPS5914930A (en) 1982-07-15 1982-07-15 Method of injection molding of insert rotor gear

Publications (2)

Publication Number Publication Date
JPS5914930A true JPS5914930A (en) 1984-01-25
JPH0324327B2 JPH0324327B2 (en) 1991-04-03

Family

ID=14858090

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12333882A Granted JPS5914930A (en) 1982-07-15 1982-07-15 Method of injection molding of insert rotor gear

Country Status (1)

Country Link
JP (1) JPS5914930A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1468815A1 (en) * 2003-04-15 2004-10-20 Frasson S.R.L. Mold and method for forming shoe soles and shoe sole portions, and shoe soles and shoe sole portions obtained thereby
US6971264B2 (en) 2002-08-23 2005-12-06 Aisan Kogyo Kabushiki Kaisha Throttle opening degree detecting apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6971264B2 (en) 2002-08-23 2005-12-06 Aisan Kogyo Kabushiki Kaisha Throttle opening degree detecting apparatus
EP1468815A1 (en) * 2003-04-15 2004-10-20 Frasson S.R.L. Mold and method for forming shoe soles and shoe sole portions, and shoe soles and shoe sole portions obtained thereby

Also Published As

Publication number Publication date
JPH0324327B2 (en) 1991-04-03

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