JPH0311609B2 - - Google Patents
Info
- Publication number
- JPH0311609B2 JPH0311609B2 JP7724886A JP7724886A JPH0311609B2 JP H0311609 B2 JPH0311609 B2 JP H0311609B2 JP 7724886 A JP7724886 A JP 7724886A JP 7724886 A JP7724886 A JP 7724886A JP H0311609 B2 JPH0311609 B2 JP H0311609B2
- Authority
- JP
- Japan
- Prior art keywords
- lens body
- resin
- gate
- view
- 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.)
- Expired
Links
- 239000011347 resin Substances 0.000 claims description 14
- 229920005989 resin Polymers 0.000 claims description 14
- 238000000465 moulding Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 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
- B29C45/0046—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity
- B29C2045/0049—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity the injected material flowing against a mould cavity protruding part
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
(イ) 産業上の利用分野
本発明は樹脂成形にて形成されるレンズ体に関
する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a lens body formed by resin molding.
(ロ) 従来の技術
従来における樹脂成形によるレンズ体１は第９
図及び第１０図の如くレンズ体１のカバー部３に
ゲート部１０を形成し、このゲート部１０から樹
脂を流入せしめていたが、斯る構成であると樹脂
は四方八方へ矢印Ｂのように流れ込み、レンズ体
の表面に樹脂が衝突して完全に融合しない線状の
マークであるウエルドＷが生じるという欠点があ
つた。(b) Conventional technology The conventional lens body 1 made of resin molding is
As shown in FIGS. 1 and 10, a gate portion 10 is formed on the cover portion 3 of the lens body 1, and resin is allowed to flow in from this gate portion 10. However, with such a configuration, the resin flows in all directions as shown by arrow B. The problem is that the resin flows into the lens body and collides with the surface of the lens body, resulting in a weld W, which is a linear mark that is not completely fused.
(ハ) 発明が解決しようとする問題点
そこで本発明は、ウエルドが生じない表面仕上
りが美しいレンズ体を提供することを目的とす
る。(C) Problems to be Solved by the Invention Therefore, an object of the present invention is to provide a lens body with a beautiful surface finish that does not cause welds.
(ニ) 問題点を解決するための手段
本発明は、樹脂流入用のゲート部の両側で且つ
短辺方向に一対の肉薄部を、レンズ体の周囲に形
成されているカバー部に成形するものである。(d) Means for Solving the Problems The present invention forms a pair of thin parts on both sides of the resin inflow gate part and in the short side direction on the cover part formed around the lens body. It is.
(ホ) 作用
ゲート部から注入された樹脂は、肉薄部にて方
向性を持たされて乱流あるいは衝突が生じること
なくスムーズに全域に行き渡るものである。(e) Effect The resin injected from the gate part is given directionality at the thin wall part and smoothly spreads over the entire area without causing turbulence or collision.
(ヘ) 実施例
１は樹脂成形にて形成されたレンズ体で、略正
方形で且つ少許その中央部が外方へ湾曲した本体
部２と、その本体部２の周囲に一体形成された帯
状のカバー部３とで成り、全体を断面〓字形と
し、且つカバー部３の端縁には係合鍔４を形成す
るとともにカバー部３の表面にネジ固定部５の突
出形成している。６，６はカバー部３の短辺方向
に形成された一対の対向する肉薄部で、後述する
ゲート部をそれらの間に位置せしめている。(F) Example 1 is a lens body formed by resin molding, which includes a main body part 2 that is approximately square and whose central part is slightly curved outward, and a belt-shaped lens body integrally formed around the main body part 2. The cover part 3 has a cross-sectional shape as a whole, and an engaging flange 4 is formed on the edge of the cover part 3, and a screw fixing part 5 is formed protruding from the surface of the cover part 3. Reference numerals 6 and 6 denote a pair of opposing thin parts formed in the short side direction of the cover part 3, and a gate part to be described later is positioned between them.
そして、前記レンズ体１の成形方法として第２
図に示す如く、下部金型８と上部左金型９ａと上
部右金型９ｂとを使用し、その時に前記レンズ体
１のカバー部３の端縁に位置するところに樹脂流
入用のゲート部１０が配設されるように前記上部
左金型９ａにランナー１１を形成している。そし
て、前記上記左金型９ａのゲート部１０の両側に
位置する所に前記肉薄部６，６を成形するための
突出部１２，１２を形成している。 A second method for forming the lens body 1 is as follows.
As shown in the figure, a lower mold 8, an upper left mold 9a, and an upper right mold 9b are used, and a gate portion for resin inflow is provided at the edge of the cover portion 3 of the lens body 1. A runner 11 is formed in the upper left mold 9a so that a runner 10 is disposed therein. Projections 12, 12 for forming the thin parts 6, 6 are formed on both sides of the gate part 10 of the left mold 9a.
斯る構成であると、第２図の状態で樹脂をラン
ナー１１から注入すると、第１図及び第４図の如
く樹脂は矢印Ａで示すように乱流を生じずに突出
部１２，１２（すなわち肉薄部６，６となる所）
にて方向性を得てスムーズに流れ、ウエルドが生
じなくなり、しかもゲート部１０付近で乱流が生
じないため樹脂の流れが跡となつて成形品にその
跡が残るというフローマークも生じなくなるもの
である。 With such a configuration, when resin is injected from the runner 11 in the state shown in FIG. 2, the resin flows through the protrusions 12, 12 ( In other words, the thin parts 6, 6)
It obtains directionality and flows smoothly, no welds occur, and since turbulence does not occur near the gate part 10, flow marks caused by resin flow leaving marks on the molded product do not occur. It is.
また樹脂成形後は第１図の如くランナー１１は
残るが、この部分は第５図の如く切断し、且つ残
りのゲート部１０は前記レンズ体１にて施蓋する
本体ケース１５に形成する凹部１６に臨むように
しておく。 Further, after the resin molding, the runner 11 remains as shown in FIG. 1, but this part is cut as shown in FIG. I will try to face the 16th.
尚、２０は本発明のレンズ体１を使用せる前照
灯で、２１は反射板、２２は電球、２３はソケツ
ト、２４はリード線、２５は取付用ホルダーであ
る。 In addition, 20 is a headlamp in which the lens body 1 of the present invention can be used, 21 is a reflector, 22 is a light bulb, 23 is a socket, 24 is a lead wire, and 25 is a mounting holder.
(ト) 発明の効果
本発明は斯る構成を有するため、樹脂成形され
るレンズ体はその表面にウエルドが生じない仕上
がりの美しい物となつて提供することができる。(g) Effects of the Invention Since the present invention has such a configuration, it is possible to provide a resin-molded lens body with a beautiful finish and no welds on its surface.
第１図は本発明レンズ体を成形する時の説明
図、第２図は同成形装置の概略断面図、第３図は
第１図の要部拡大斜視図、第４図は第１図の要部
拡大概略説明図、第５図は同拡大断面図、第６図
はレンズ体を前照灯に使用したときの要部断面
図、第７図は同前照灯の斜視図、第８図は第７図
の概略断面図、第９図は従来のレンズ体を成形す
るときの説明図、第１０図は第９図の要部断面図
である。
１……レンズ体、３……カバー部、１０……ゲ
ート部、６……肉薄部。
Fig. 1 is an explanatory view of molding the lens body of the present invention, Fig. 2 is a schematic sectional view of the same molding device, Fig. 3 is an enlarged perspective view of the main part of Fig. FIG. 5 is an enlarged sectional view of the main part; FIG. 6 is a sectional view of the main part when the lens body is used in a headlamp; FIG. 7 is a perspective view of the headlamp; The drawings are a schematic cross-sectional view of FIG. 7, FIG. 9 is an explanatory view when molding a conventional lens body, and FIG. 10 is a cross-sectional view of the main part of FIG. 1...Lens body, 3...Cover part, 10...Gate part, 6...Thin part.
Claims (1)
の樹脂成形レンズ体において、前記カバー部に樹
脂流入用のゲート部を形成するとともに該ゲート
部の両側で且つ短辺方向に一対の肉薄部を形成し
たことを特徴とする樹脂成形レンズ体。1. In a resin-molded lens body having a square cross section and having a band-shaped cover portion formed around the periphery, a gate portion for resin inflow is formed in the cover portion, and a pair of thin portions are provided on both sides of the gate portion in the short side direction. A resin-molded lens body characterized by the following:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7724886A JPS62233233A (en) | 1986-04-03 | 1986-04-03 | Resin molded lens body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7724886A JPS62233233A (en) | 1986-04-03 | 1986-04-03 | Resin molded lens body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62233233A JPS62233233A (en) | 1987-10-13 |
| JPH0311609B2 true JPH0311609B2 (en) | 1991-02-18 |
Family
ID=13628554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7724886A Granted JPS62233233A (en) | 1986-04-03 | 1986-04-03 | Resin molded lens body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62233233A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT515836B1 (en) * | 2014-06-11 | 2016-03-15 | Zizala Lichtsysteme Gmbh | Closing unit for an injection molding machine |
-
1986
- 1986-04-03 JP JP7724886A patent/JPS62233233A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62233233A (en) | 1987-10-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |