JPH0244701B2 - - Google Patents
Info
- Publication number
- JPH0244701B2 JPH0244701B2 JP60289225A JP28922585A JPH0244701B2 JP H0244701 B2 JPH0244701 B2 JP H0244701B2 JP 60289225 A JP60289225 A JP 60289225A JP 28922585 A JP28922585 A JP 28922585A JP H0244701 B2 JPH0244701 B2 JP H0244701B2
- Authority
- JP
- Japan
- Prior art keywords
- gear
- ribs
- orientation
- injection molding
- flow
- 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
Links
- 238000001746 injection moulding Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 6
- 239000004917 carbon fiber Substances 0.000 claims description 6
- 239000012768 molten material Substances 0.000 claims description 6
- 239000003365 glass fiber Substances 0.000 claims description 5
- 239000012815 thermoplastic material Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims 1
- 239000012778 molding material Substances 0.000 description 7
- 238000000465 moulding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 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
- B29C45/0046—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/082—Details specially related to intermeshing engagement type machines or pumps
- F04C2/084—Toothed wheels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2230/00—Manufacture
- F04C2230/20—Manufacture essentially without removing material
- F04C2230/21—Manufacture essentially without removing material by casting
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は特にガラス及び炭素繊維類等の添加物
入り熱可塑性プラスチツクによる歯車の射出成形
方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention particularly relates to a method for injection molding gears from thermoplastic plastics containing additives such as glass and carbon fibers.
従来の射出成形においては、第５図及び第６図
に示すように、歯車成形品ａの両側面に肉盗みの
凹部ｂを設け、多点ゲートｃによる成形が行なわ
れている。
In conventional injection molding, as shown in FIGS. 5 and 6, recesses b are provided on both sides of a gear molded product a, and molding is performed using multi-point gates c.
しかしながら上記従来の方法によつて歯車を成
形する場合、第７図に示すようにガラス及び炭素
繊維類等を添加した溶融成形材料の合流線（ウエ
ルドライン）方向は配向性のため収縮せず、うず
巻状の流れ方向は収縮する。特にガラス及び炭素
繊維類等を添加した成形材料の場合は材料そのも
のの配向性から多点ゲートによるゲート間方向の
外径及びゲート部方向の外径においての変形が大
きくなる等の問題がありその防止は極めて因難で
ある。
However, when a gear is molded by the above-mentioned conventional method, as shown in FIG. 7, the weld line direction of the molten molding material to which glass and carbon fibers are added does not shrink due to orientation. The spiral flow direction contracts. In particular, in the case of molding materials containing glass, carbon fibers, etc., there are problems such as increased deformation in the outer diameter in the direction between the gates and in the direction of the gates due to the orientation of the material itself. Prevention is extremely difficult.
本発明は上記の問題点を解消することを目的と
したもので、成形材料の配向性を平均化させ、形
状、寸法等の精度を向上させることにある。 The present invention is aimed at solving the above-mentioned problems, and is aimed at equalizing the orientation of the molding material and improving the accuracy of shape, size, etc.
上記の目的を達成するため本発明は次のように
構成したものである。
In order to achieve the above object, the present invention is constructed as follows.
即ち本発明はガラス及び炭素繊維類等の添加物
入り熱可塑性プラスチツク材料による歯車の射出
成形において、可塑化された溶融材料の金型内で
の流れと、その添加物の配向性により生じる歯車
外形の変形、カミ合い誤差等を極力少なくするた
め、成形歯車に複数の肉盗みとリブを設け、かつ
複数のゲートを前記各リブ間で一つ置きの位置に
設定し、歯車形状が変形による影響のないように
溶融材料の流れを分流制御するようにしたことを
特徴とする歯車の射出成形方法である。 That is, the present invention is directed to the injection molding of gears using thermoplastic materials containing additives such as glass and carbon fibers, and the flow of the plasticized molten material in the mold and the shape of the outer shape of the gear caused by the orientation of the additives. In order to minimize deformation, misalignment, etc., the molded gear is provided with multiple fillets and ribs, and multiple gates are set at every other position between the ribs, so that the gear shape is free from the effects of deformation. This is a method for injection molding gears, characterized in that the flow of molten material is controlled in a divided manner to prevent the flow of molten material from occurring.
歯車の射出成形において、ガラス及び炭素繊維
類等の添加物入り成形材料が金型キヤビテイー内
に充填される際第４図に示すように溶融材料の流
れを分流制御して配向性を平均化させる。
In injection molding of gears, when a molding material containing additives such as glass and carbon fibers is filled into a mold cavity, the flow of the molten material is divided and controlled to equalize the orientation as shown in FIG.
〔実施例〕
第１図乃至第３図において符号１は本発明方法
により製出した歯車で、中心に設けた固定管部２
と外周に噛合歯３を有する環状部４間の両側面に
肉盗みの凹部５，５′と複数（図示の実施例では
10本）のリブ６，６を所定の間隔を存して放射状
に設けてある。そして本発明においては前記凹部
５，５に設けた各リブ６，６間で一つ置きの位置
ゲート７を複数（図示の実施例では５箇所）設け
たものである。また第８図は従来の５点ゲートに
より製出した歯車と、本発明方法の５点ゲートに
より製出した歯車の各変形率を示したグラフで、
各〃直径15.2mmのものを工具顕微鏡により１目盛
10μで表わしたものである。そして点線は従来の
ものを示し、実線は本発明のものを示す。[Example] In Figs. 1 to 3, reference numeral 1 denotes a gear produced by the method of the present invention, with a fixed tube part 2 provided at the center.
and a plurality of recesses 5, 5' (in the illustrated embodiment) on both sides between the annular portion 4 having meshing teeth 3 on the outer periphery.
10) ribs 6, 6 are provided radially at predetermined intervals. In the present invention, a plurality of (in the illustrated embodiment, five) position gates 7 are provided at every other position between the respective ribs 6, 6 provided in the recesses 5, 5. FIG. 8 is a graph showing the deformation rates of gears produced using the conventional 5-point gate and gears produced using the 5-point gate of the present invention.
Each piece with a diameter of 15.2 mm is marked by one scale using a tool microscope.
It is expressed in 10μ. The dotted line shows the conventional one, and the solid line shows the one of the present invention.
本発明によれば成形歯車に複数の肉盗みリブを
設け、かつ複数のゲートを前記各リブ間で一つ置
きの位置に設定しことにより成形材料の配向性を
均一化させることができ、形状的、機能的、寸法
的に満足出来る成形品を生産し得るものである。
According to the present invention, by providing a plurality of thinning ribs on the molded gear and setting a plurality of gates at every other position between the ribs, the orientation of the molding material can be made uniform, and the shape It is possible to produce molded products that are physically, functionally, and dimensionally satisfactory.
第１図は本発明に係る成形方法により製出した
歯車の正面図、第２図及び第３図は第１図−
線及び−線における断面図、第４図は成形材
料の配向性を示す説明図、第５図は従来の成形方
法により製出された歯車の正面図、第６図は第５
図−線における断面図、第７図は従来の成形
方法による成形材料の配向性を示す説面図、第８
図は本発明と従来例による成形品の変形率を表わ
したグラフである。
１〜歯車、５，５′〜凹部、６〜リブ、７〜ゲ
ート。
Fig. 1 is a front view of a gear manufactured by the molding method according to the present invention, and Figs. 2 and 3 are Fig. 1-
4 is an explanatory diagram showing the orientation of the molding material, FIG. 5 is a front view of a gear manufactured by the conventional molding method, and FIG.
Figure 7 is a cross-sectional view taken along the line, Figure 7 is an explanatory diagram showing the orientation of the molding material by the conventional molding method, Figure 8 is
The figure is a graph showing the deformation rate of molded products according to the present invention and a conventional example. 1 - gear, 5, 5' - recess, 6 - rib, 7 - gate.
Claims (1)
性プラスチツク材料による歯車の射出成形におい
て、可塑化された溶融材料の金型内での流れと、
その添加物の配向性により生じる歯車外形の変
形、カミ合い誤差等を極力少なくするため、成形
歯車に複数の肉盗みとリブを設け、かつ複数のゲ
ートを前記各リブ間で一つ置きの位置に設定し、
歯車形状が変形による影響のないように溶融材料
の流れを分流制御するようにしたことを特徴とす
る歯車の射出成形方法。1. In injection molding of gears using thermoplastic materials containing additives such as glass and carbon fibers, the flow of plasticized molten material within the mold,
In order to minimize deformation of the gear external shape and misalignment errors caused by the orientation of the additive, the molded gear is provided with multiple fillets and ribs, and multiple gates are placed at every other position between the ribs. Set to
A method for injection molding a gear, characterized in that the flow of molten material is controlled in a divided manner so that the shape of the gear is not affected by deformation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60289225A JPS62148219A (en) | 1985-12-24 | 1985-12-24 | Injection molding of gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60289225A JPS62148219A (en) | 1985-12-24 | 1985-12-24 | Injection molding of gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62148219A JPS62148219A (en) | 1987-07-02 |
| JPH0244701B2 true JPH0244701B2 (en) | 1990-10-04 |
Family
ID=17740405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60289225A Granted JPS62148219A (en) | 1985-12-24 | 1985-12-24 | Injection molding of gear |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62148219A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003028274A (en) * | 2001-07-19 | 2003-01-29 | Bando Chem Ind Ltd | Fiber reinforced resin gear and its manufacturing method |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0677947B2 (en) * | 1989-03-16 | 1994-10-05 | 光洋精工株式会社 | Method for manufacturing cage made of synthetic resin |
| JP2525382Y2 (en) * | 1992-05-27 | 1997-02-12 | アイワ株式会社 | Pulley |
| JP4481400B2 (en) * | 1999-09-22 | 2010-06-16 | 住友化学株式会社 | Method for producing molded body made of liquid crystal polyester resin and method for producing connector part |
| JP4173053B2 (en) * | 2003-06-02 | 2008-10-29 | 株式会社エンプラス | Injection molding resin gear, injection molding resin sprocket, injection molding resin pulley, injection molding resin roller |
| ITPN20050003A1 (en) * | 2005-01-14 | 2006-07-15 | Grusan S R L | METHOD TO PRODUCE A PULLEY IN PLASTIC MATERIAL AND PULLEY OBTAINED WITH THIS METHOD |
| JP4718342B2 (en) * | 2006-02-13 | 2011-07-06 | 愛三工業株式会社 | Resin gear |
| JP4919052B2 (en) * | 2007-05-29 | 2012-04-18 | 東芝ホームテクノ株式会社 | rice cooker |
| DE102008018514A1 (en) | 2008-04-12 | 2009-10-15 | Voss Automotive Gmbh | A method for producing a shaped article with annular cross-section and molding according to such a method |
| EP2390075A1 (en) | 2010-05-31 | 2011-11-30 | Electrolux Home Products Corporation N.V. | Method and molding equipment for making a plastic wheel, and wheel thus obtained |
| JP2017065642A (en) * | 2015-10-02 | 2017-04-06 | 株式会社ブリヂストン | Non-pneumatic tire and its manufacturing method |
-
1985
- 1985-12-24 JP JP60289225A patent/JPS62148219A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003028274A (en) * | 2001-07-19 | 2003-01-29 | Bando Chem Ind Ltd | Fiber reinforced resin gear and its manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62148219A (en) | 1987-07-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |