JPH0120045B2 - - Google Patents
Info
- Publication number
- JPH0120045B2 JPH0120045B2 JP3562683A JP3562683A JPH0120045B2 JP H0120045 B2 JPH0120045 B2 JP H0120045B2 JP 3562683 A JP3562683 A JP 3562683A JP 3562683 A JP3562683 A JP 3562683A JP H0120045 B2 JPH0120045 B2 JP H0120045B2
- Authority
- JP
- Japan
- Prior art keywords
- cavity
- front fender
- automobile
- forming
- arch
- 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
- 229920005989 resin Polymers 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 8
- 229920003002 synthetic resin Polymers 0.000 claims description 7
- 239000000057 synthetic resin Substances 0.000 claims description 7
- 229920001169 thermoplastic Polymers 0.000 claims description 7
- 239000004416 thermosoftening plastic Substances 0.000 claims description 7
- 238000001746 injection moulding Methods 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 239000004431 polycarbonate resin Substances 0.000 description 2
- 229920005668 polycarbonate resin Polymers 0.000 description 2
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002787 reinforcement Effects 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
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
-
- 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
-
- 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
-
- 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
- B29C45/2701—Details not specific to hot or cold runner channels
-
- 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
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3005—Body finishings
-
- 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
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3055—Cars
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は、フロントホイールの上面に沿うアー
チ状部分を備えた自動車用フロントフエンダを熱
可塑性合成樹脂より射出成形する自動車用フロン
トフエンダの成形方法およびその方法に用いられ
る成形型に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for molding a front fender for an automobile, in which the front fender for an automobile is equipped with an arched portion along the upper surface of a front wheel, by injection molding from a thermoplastic synthetic resin, and a method for molding the front fender for an automobile, and a method for forming the front fender for an automobile by injection molding the front fender for an automobile from a thermoplastic synthetic resin. Concerning molds.
従来、この種フロントフエンダは耐衝撃性を考
慮してポリカーボネート樹脂、そのブレンドもの
等を用いて成形されているが、この樹脂は粘性が
高いため、成形型のゲート方案いかんによつては
溶融樹脂流が互いに交差し、その交差部にウエル
ドマークを発生してその部分の衝撃強度が低下す
るという不具合がある。 Conventionally, front fenders of this type have been molded using polycarbonate resin or blends thereof, taking impact resistance into consideration, but this resin has a high viscosity, so depending on the gate design of the mold, it may melt. There is a problem in that the resin flows intersect with each other and weld marks are generated at the intersections, reducing the impact strength of the areas.
本発明は上記に鑑み、全体に亘つて優れた衝撃
強度を有するフロントフエンダを得ることのでき
る成形方法および成形型を提供することを目的と
する。 In view of the above, an object of the present invention is to provide a molding method and a molding die that can obtain a front fender having excellent overall impact strength.
以下、図面により本発明の一実施例について説
明すると、フロントフエンダＦは、第１図に示す
ように、車体の一部を構成し得るように車体組立
体Ｂに固着されてフロントホイールWfの上面を
覆うようになつている。 Hereinafter, one embodiment of the present invention will be described with reference to the drawings. As shown in FIG. It is designed to cover the top surface.
フロントフエンダＦはポリカーボネート樹脂、
ポリカーボネートアロイ樹脂、ポリカーボネート
ABS樹脂等の比較的優れた耐衝撃性を有する熱
可塑性合成樹脂を用いて射出成形されたもので、
それは第２図に示すようにフロントホイールWf
の上面に沿うアーチ状部分１と、フロントピラー
Pf側の後端部分２と、両部分１，２に接続され
たフエンダ主体部分３とよりなる。 Front fender F is made of polycarbonate resin,
Polycarbonate alloy resin, polycarbonate
It is injection molded using a thermoplastic synthetic resin with relatively excellent impact resistance such as ABS resin.
It is the front wheel Wf as shown in Figure 2.
Arched part 1 along the top surface of the front pillar
It consists of a rear end portion 2 on the Pf side and a main fender portion 3 connected to both portions 1 and 2.
成形型４は、第４図に示すようにフロントフエ
ンダＦの形状に対応するキヤビテイ５を有し、そ
のキヤビテイ５のアーチ状部分形成部５ａには、
そのアーチ面に沿つて複数個のゲート６が所定の
間隔で開口している。各ゲート６は、第３図に示
すように例えば幅ｗ＝10〜20mm、厚さｔ＝３〜５
mmに形成される。 The mold 4 has a cavity 5 corresponding to the shape of the front fender F, as shown in FIG.
A plurality of gates 6 are opened at predetermined intervals along the arch surface. As shown in FIG. 3, each gate 6 has a width w=10 to 20 mm and a thickness t=3 to 5 mm, for example.
Formed in mm.
またキヤビテイ５には、そのアーチ状部分形成
部５ａからキヤビテイ端壁までの放射方向の距離
が最も長い部分、図示例はアーチ状部分形成部５
ａから後端部分形成部５ｂ上端に達する部分に所
定幅の補強リブ形成用溝部７が設けられている。
８は各ゲート６をスプルー９に連通するランナで
ある。 Further, the cavity 5 has a portion where the distance in the radial direction from the arch-shaped portion forming portion 5a to the cavity end wall is the longest, the illustrated example is the arch-shaped portion forming portion 5.
A reinforcing rib forming groove 7 having a predetermined width is provided in a portion extending from a to the upper end of the rear end portion forming portion 5b.
8 is a runner that communicates each gate 6 with the sprue 9.
上記のように各ゲート６を配列することによつ
て、成形時にはキヤビテイ５内にそれらゲート６
より放射状に複数本の溶融樹脂流Ｒが形成される
ので、隣接する溶融樹脂流Ｒが互いに融合し易く
なり、これによりウエルドマークの発生を防止し
て部分的衝撃強度の低下といつた不具合を除去す
ることができる。またアーチ状部分１と、それよ
り放射方向に最も離れた後端部分２上端との間に
補強リブ１０が形成されるので、そのリブ１０に
より脆弱部を補強し、前記ウエルドマーク発生防
止効果と相俟つて全体に亘り優れた衝撃強度を有
するフロントフエンダＦを得ることができる。 By arranging the gates 6 as described above, the gates 6 are placed inside the cavity 5 during molding.
Since a plurality of molten resin flows R are formed more radially, adjacent molten resin flows R are more likely to fuse with each other, thereby preventing the occurrence of weld marks and preventing problems such as a decrease in partial impact strength. Can be removed. Further, since a reinforcing rib 10 is formed between the arched portion 1 and the upper end of the rear end portion 2 that is farthest from the arched portion 1 in the radial direction, the rib 10 reinforces the weak portion and achieves the weld mark prevention effect. In combination, it is possible to obtain the front fender F having excellent impact strength throughout.
以上のように、第１発明によれば、フロントホ
イールの上面に沿うアーチ状部分を備えた自動車
用フロントフエンダを熱可塑性合成樹脂より射出
成形するに当り、成形型のキヤビテイ内に、それ
のアーチ状部分形成部より放射状に複数本の溶融
樹脂流を形成するようにしたので、隣接する溶融
樹脂流が互いに融合し易くなり、これによりウエ
ルドマークの発生を防止して部分的衝撃強度の低
下といつた不具合を除去することができる。 As described above, according to the first invention, when injection molding a front fender for an automobile having an arch-shaped portion along the upper surface of a front wheel from a thermoplastic synthetic resin, the fender is placed in the cavity of a mold. Since a plurality of molten resin flows are formed radially from the arch-shaped portion forming part, adjacent molten resin flows easily fuse with each other, thereby preventing the occurrence of weld marks and reducing partial impact strength. It is possible to eliminate such problems.
また、第２発明によれば、フロントホイールの
上面に沿うアーチ状部分を備えた自動車用フロン
トフエンダを熱可塑性合成樹脂より射出成形する
ための成形型において、キヤビテイのアーチ状部
分形成部に、それのアーチ面に沿つて複数個のゲ
ートを所定の間隔で開口させ、キヤビテイに、そ
れのアーチ状部分形成部からキヤビテイ端壁まで
の放射方向の距離が最も長い部分に補強リブ形成
用溝部を設けたので、アーチ状部分とそれより最
も離れた部分との間に補強リブを形成して脆弱と
なる部分を補強し、全体に亘つて優れた衝撃強度
を有するフロントフエンダを得ることができる。 According to the second aspect of the invention, in a mold for injection molding a front fender for an automobile having an arched portion along the upper surface of a front wheel from a thermoplastic synthetic resin, the arched portion forming portion of the cavity is provided with: A plurality of gates are opened at predetermined intervals along the arched surface of the cavity, and a reinforcing rib forming groove is formed in the cavity at the part where the distance in the radial direction from the arched part forming part to the cavity end wall is the longest. With this structure, a reinforcing rib is formed between the arched part and the part furthest away from it, reinforcing the vulnerable part, making it possible to obtain a front fender that has excellent impact strength throughout. .
図面は本発明の一実施例を示すもので、第１図
は自動車の斜視図、第２図はフロントフエンダの
側面図、第３図はフロントフエンダの拡大部分斜
視図、第４図は成形型の平面図、第５図は第４図
−線断面図である。
Ｆ……フロントフエンダ、Ｒ……溶融樹脂流、
Wf……フロントホイール、１……アーチ状部分、
４……成形型、５……キヤビテイ、５ａ……アー
チ状部分形成部、６……ゲート、７……補強リブ
形成用溝部。
The drawings show one embodiment of the present invention, in which Fig. 1 is a perspective view of an automobile, Fig. 2 is a side view of the front fender, Fig. 3 is an enlarged perspective view of the front fender, and Fig. 4 is a perspective view of the front fender. A plan view of the mold, and FIG. 5 is a sectional view taken along the line of FIG. 4. F...front fender, R...molten resin flow,
Wf...front wheel, 1...arched part,
4... Molding die, 5... Cavity, 5a... Arch-shaped portion forming portion, 6... Gate, 7... Reinforcement rib forming groove.
Claims (1)
を備えた自動車用フロントフエンダを熱可塑性合
成樹脂より射出成形するに当り、成形型のキヤビ
テイ内に、それのアーチ状部分形成部より放射状
に複数本の溶融樹脂流を形成することを特徴とす
る、自動車用フロントフエンダの成形方法。 ２ フロントホイールの上面に沿うアーチ状部分
を備えた自動車用フロントフエンダを熱可塑性合
成樹脂より射出成形するための成形型において、
キヤビテイのアーチ状部分形成部に、それのアー
チ面に沿つて複数個のゲートを所定の間隔で開口
させ、前記キヤビテイに、それの前記アーチ状部
分形成部からキヤビテイ端壁までの放射方向の距
離が最も長い部分に補強リブ形成用溝部を設けた
ことを特徴とする自動車用フロントフエンダの成
形型。[Claims] 1. When injection molding a front fender for an automobile having an arched portion along the upper surface of a front wheel from thermoplastic synthetic resin, the arched portion forming portion is placed in the cavity of a molding die. A method for molding a front fender for an automobile, characterized by forming a plurality of molten resin flows in a radial manner. 2. In a mold for injection molding an automobile front fender having an arched portion along the upper surface of a front wheel from thermoplastic synthetic resin,
A plurality of gates are opened at predetermined intervals in the arch-shaped part forming part of the cavity along the arch surface thereof, and the distance in the radial direction from the arch-shaped part forming part of the cavity to the cavity end wall is set in the cavity. A mold for a front fender for an automobile, characterized in that a groove for forming a reinforcing rib is provided in the longest part.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3562683A JPS59171761A (en) | 1983-03-04 | 1983-03-04 | Molding method for car front fender and mold thereof |
| GB8405537A GB2136364B (en) | 1983-03-04 | 1984-03-02 | Automobile wing |
| DE19843408091 DE3408091A1 (en) | 1983-03-04 | 1984-03-05 | FENDER FOR A MOTOR VEHICLE AND METHOD FOR THE PRODUCTION THEREOF |
| FR8403397A FR2541959B1 (en) | 1983-03-04 | 1984-03-05 | AUTOMOTIVE FENDER MOLDED IN SYNTHETIC OR SIMILAR RESIN AND MANUFACTURING METHOD THEREOF |
| US06/585,985 US4623190A (en) | 1983-03-04 | 1984-03-05 | Molded fender for automobiles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3562683A JPS59171761A (en) | 1983-03-04 | 1983-03-04 | Molding method for car front fender and mold thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59171761A JPS59171761A (en) | 1984-09-28 |
| JPH0120045B2 true JPH0120045B2 (en) | 1989-04-14 |
Family
ID=12447069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3562683A Granted JPS59171761A (en) | 1983-03-04 | 1983-03-04 | Molding method for car front fender and mold thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59171761A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109895344A (en) * | 2019-04-14 | 2019-06-18 | 富诚汽车零部件清远有限公司 | A kind of processing technology of automobile wheel arch |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4974424A (en) * | 1986-02-04 | 1990-12-04 | Kawasaki Steel Corp. | Method and system for cooling strip |
| JP2008162126A (en) * | 2006-12-28 | 2008-07-17 | Mitsubishi Motors Corp | Mold for molding resin |
| DE102017220891A1 (en) * | 2017-11-22 | 2019-05-23 | Sms Group Gmbh | Method for cooling a metallic material and cooling beam |
-
1983
- 1983-03-04 JP JP3562683A patent/JPS59171761A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109895344A (en) * | 2019-04-14 | 2019-06-18 | 富诚汽车零部件清远有限公司 | A kind of processing technology of automobile wheel arch |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59171761A (en) | 1984-09-28 |
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