JPS6140173B2 - - Google Patents
Info
- Publication number
- JPS6140173B2 JPS6140173B2 JP56174868A JP17486881A JPS6140173B2 JP S6140173 B2 JPS6140173 B2 JP S6140173B2 JP 56174868 A JP56174868 A JP 56174868A JP 17486881 A JP17486881 A JP 17486881A JP S6140173 B2 JPS6140173 B2 JP S6140173B2
- Authority
- JP
- Japan
- Prior art keywords
- air
- injection
- character
- manufacturing
- base
- 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
- 238000002347 injection Methods 0.000 claims description 24
- 239000007924 injection Substances 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 229920003002 synthetic resin Polymers 0.000 claims description 11
- 239000000057 synthetic resin Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 3
- 238000013022 venting Methods 0.000 claims 1
- 238000001746 injection moulding Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 239000000758 substrate Substances 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000003825 pressing 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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/34—Moulds having venting means
-
- 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
- B29C45/16—Making multilayered or multicoloured articles
-
- 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
- B29C45/16—Making multilayered or multicoloured articles
- B29C2045/1681—Making multilayered or multicoloured articles one layer penetrating at one or more areas through another layer
Description
【発明の詳細な説明】
この発明は、それぞれ注入孔を備えた複数の文
字・マーク用キヤビテイ（以下「文字用キヤビテ
イ」と略す）が形成された合成樹脂からなる基体
を射出成形し、各キヤビテイに軟質合成樹脂材料
を注入孔を介して文字・マーク部（以下「文字
部」と略す）を射出成形する成形品の製造方法に
関し、特に自動車用モール等に適用するものであ
る。[Detailed Description of the Invention] This invention involves injection molding a base made of synthetic resin on which a plurality of character/mark cavities (hereinafter abbreviated as "character cavities") each having an injection hole are formed, and each cavity is formed by injection molding. The present invention relates to a method of manufacturing a molded product by injection molding a character/mark part (hereinafter referred to as "character part") using a soft synthetic resin material through an injection hole, and is particularly applicable to automotive moldings and the like.
この種の文字・マーク入り射出成形品、例えば
第１〜２図に示すようなモールを製造する場合、
第３図に示すような金型に合成樹脂で射出成形し
た基体１をセツトした後、文字部２を射出成形し
ていた。この文字部２の形成の際、文字用キヤビ
テイ３は基体１が下型４で押圧されてセツトされ
略密閉室となつているので、第４図に示すよう
に、空気の逃げ場がなく材料が空気を巻き込む。
このとき、射出材料が軟質合成樹脂であると、空
気巻き込み部位の文字部上面が型開らき後、反発
弾性によりふくれが生じることがある。この傾向
は、第２図のように文字部２がアンダーカツトで
あると、成形後の空気の逃げもシールされてより
著しい。 When manufacturing this type of injection molded product with characters and marks, for example moldings as shown in Figures 1 and 2,
After a base body 1 injection-molded from a synthetic resin was set in a mold as shown in FIG. 3, a character portion 2 was injection-molded. When forming the character part 2, the character cavity 3 is set by pressing the base 1 with the lower mold 4, forming a substantially sealed chamber, so that there is no place for air to escape and the material is Engage the air.
At this time, if the injection material is a soft synthetic resin, the upper surface of the character part at the air-intake area may bulge due to rebound resilience after the mold is opened. This tendency is more pronounced when the character portion 2 is undercut as shown in FIG. 2, since air escape after molding is also sealed.
この発明は、上記にかんがみて、空気を巻き込
んで文字部上面にふくれの生じるおそれがない文
字・マーク入り射出成形品の製造方法を提供する
ことを目的とする。 In view of the above, it is an object of the present invention to provide a method for manufacturing an injection molded product containing characters and marks without the risk of air being drawn in and blistering occurring on the upper surface of the character portion.
この発明の文字・マーク入り射出成形品の製造
方法は、それぞれ注入孔を備えた複数の文字・マ
ーク用キヤビテイが形成された合成樹脂からなる
基体を射出成形し、各キヤビテイに軟質合成樹脂
材料を各注入孔を介して充填して文字・マーク部
を射出成形する成形品の製造方法において、各文
字・マーク用キヤビテイの材料流れ終了部位又は
その手前位置に基体裏面側へ抜ける空気抜き孔を
設けるとともに、基体裏面と金型面との間に空気
抜き用隙間又は空気溜りを設けた構成により上記
目的と達成する。 The method of manufacturing an injection molded article with characters and marks according to the present invention involves injection molding a base made of synthetic resin in which a plurality of cavities for characters and marks each having an injection hole are formed, and a soft synthetic resin material is injected into each cavity. In a method of manufacturing a molded product in which characters and marks are injection-molded by filling through each injection hole, an air vent hole is provided at the end of the material flow of each character and mark cavity or at a position in front of the end of the material flow, and The above object is achieved by a configuration in which an air vent gap or an air pocket is provided between the back surface of the base and the mold surface.
以下、この発明の実施例を、図例に基づいて説
明する。 Hereinafter, embodiments of the present invention will be described based on illustrated examples.
それぞれ注入孔５を備えた複数の文字用キヤビ
テイ３が形成された合成樹脂からなる基体１Ａを
射出成形する。このとき、各文字用キヤビテイ３
の材料流れ終了部位又はその手前位置に基体裏面
側へ抜ける空気抜き孔６が設けられている。ここ
で基体１Ａの材料としては、PVC、ABS、PP等
の軟質又は硬質の合成樹脂を用いる。 A base body 1A made of synthetic resin and having a plurality of character cavities 3 each having an injection hole 5 is injection molded. At this time, each character cavity 3
An air vent hole 6 is provided at the end of the material flow or at a position in front of the end of the flow of the material. Here, as the material of the base 1A, a soft or hard synthetic resin such as PVC, ABS, PP, etc. is used.
次に、従来と同様第３図に示すように、上記基
体１Ａを金型にセツトする。なお、金型の基体裏
面と対接する部分（上型９）には第５図に示すよ
うにシボ面とされている。また、シボ面の形成部
位は空気逃げを確実にするために基体裏面対接部
位外縁より若干はみ出ていることが望ましい。射
出成形機（図示せず）から軟質PVC、軟質ポリ
ウレタン、オレフイン系エラストマ等の軟質合成
樹脂材料を射出して、スプル−ゲート７、サブラ
ンナー８を介して各注入孔５に射出材料を導入
し、各キヤビテイ３を充填して文字部２を射出成
形する。このとき、各キヤビテイ３に残留してい
る空気は、射出材料により押圧されて空気抜き孔
６を経て基体裏面に至り、金型のシボ面と基体裏
面とで形成される空気抜き用隙間１１及び型合せ
面１０を経て外気へ放出される。このため、文字
部２に空気が巻き込まれることなく文字部２にふ
くれが発生することはない。 Next, as in the conventional case, the base body 1A is set in a mold as shown in FIG. Note that the portion of the mold that is in contact with the back surface of the base (upper mold 9) has a textured surface as shown in FIG. Further, it is desirable that the area where the textured surface is formed protrudes slightly from the outer edge of the area where the back surface of the substrate contacts, in order to ensure air escape. A soft synthetic resin material such as soft PVC, soft polyurethane, or olefin elastomer is injected from an injection molding machine (not shown), and the injection material is introduced into each injection hole 5 via a sprue gate 7 and a sub-runner 8. , each cavity 3 is filled and the character part 2 is injection molded. At this time, the air remaining in each cavity 3 is pressed by the injection material and reaches the back surface of the base through the air vent hole 6, and the air vent gap 11 formed between the textured surface of the mold and the back surface of the base and the mold alignment It is discharged to the outside air through the surface 10. Therefore, air is not drawn into the character part 2, and the character part 2 does not bulge.
なお、上記実施例において第６図に示すよう
に、金型面をシボ面とする代りに基体裏面をシボ
面としても同様の作用効果を奏する。 In addition, as shown in FIG. 6 in the above embodiment, the same effect can be obtained by using a textured surface on the back surface of the base instead of using the textured surface on the mold surface.
また、第７図に示すように、基体裏面に、各空
気抜き孔６と連通して形成され端端に拡大部１２
を備えた鍵穴状のスロツト１３を形成してもよ
い。この場合は、各キヤビテイ３に残留している
空気は外気へは逃げないがスロツト１３が空気溜
りの作用を奏するので、やはり文字部２に空気が
巻き込まれることなく文字部２にふくれが発生す
ることはない。なお、空気溜りと空気抜き用隙間
は併用しても勿論よい。 In addition, as shown in FIG. 7, an enlarged portion 12 is formed on the back surface of the base body to communicate with each air vent hole 6, and an enlarged portion 12 is formed at the end.
A keyhole-shaped slot 13 may be formed. In this case, the air remaining in each cavity 3 does not escape to the outside air, but the slots 13 act as air pockets, so the air does not get caught up in the character part 2 and blistering occurs in the character part 2. Never. Note that, of course, the air pocket and the air vent gap may be used together.
この発明の文字・マーク入り射出成形品の製造
方法は、上記のような構成なので、文字部を射出
成形する際、文字部に空気が巻き込まれることな
く、従つて、文字部上面に空気巻き込みによるふ
くれ等の不良が発生するおそれがない。 Since the method for producing an injection molded product with characters and marks according to the present invention has the above-described structure, when injection molding the character part, air is not drawn into the character part, and therefore, the upper surface of the character part is free from air entrainment. There is no risk of defects such as blistering occurring.
第１図は射出成形品の一例を示すモールの斜視
図、第２図は第１図の−線断面図、第３図は
モールの製造方法に使用する金型の概略断面図、
第４図は従来の製造方法における材料流れを示す
金型の部分断面図、第５図はこの発明の製造方法
おける材料流れを示す金型の部分断面図、第６図
はこの発明の製造方法に使用する基体裏面がシボ
面とされたモールの裏面図、第７図はこの発明の
製造方法に使用する基体裏面に空気溜りとしての
スロツトが形成されたモールの裏面図である。
１，１Ａ……基体、２……文字・マーク部、３
……文字・マーク用キヤビテイ、４……下型、５
……注入孔、６……空気抜き孔、９……上型、１
１……空気抜き用隙間、１２……拡大部、１３…
…スロツト。
Fig. 1 is a perspective view of a molding showing an example of an injection molded product, Fig. 2 is a sectional view taken along the line - - in Fig. 1, and Fig. 3 is a schematic sectional view of a mold used in the method for manufacturing the molding.
FIG. 4 is a partial cross-sectional view of a mold showing material flow in the conventional manufacturing method, FIG. 5 is a partial cross-sectional view of a mold showing material flow in the manufacturing method of the present invention, and FIG. 6 is a partial cross-sectional view of a mold showing material flow in the manufacturing method of the present invention. FIG. 7 is a back view of a molding in which the back surface of a substrate used in the manufacturing method of the present invention has a textured surface, and FIG. 1,1A...Base body, 2...Character/mark part, 3
...Cavity for characters/marks, 4...Lower mold, 5
... Injection hole, 6 ... Air vent hole, 9 ... Upper mold, 1
1...Air vent gap, 12...Enlarged part, 13...
...Slot.
Claims (1)
用キヤビテイが形成された合成樹脂からなる基体
を射出成形し、前記各キヤビテイに軟質合成樹脂
材料を前記各注入孔を介して充填して文字・マー
ク部を射出成形する成形品の製造方法において、 前記各文字・マーク用キヤビテイの材料流れ終
了部位又はその手前位置に基体裏面側へ抜ける空
気抜き孔を設けるとともに、基体裏面と金型面と
の間に空気抜き用隙間又は空気溜りを設けたこと
を特徴とする文字・マーク入り射出成形品の製造
方法。 ２ 前記空気抜き用隙間が基体裏面又は該基体裏
面と対接する金型面に形成されたシボ面により形
成されていることを特徴とする特許請求の範囲第
１項記載の文字・マーク入り射出成形品の製造方
法。 ３ 前記空気溜りが各空気抜き孔と連通して基体
裏面に形成され端部に拡大部を備えた鍵穴状のス
ロツトにより形成されていることを特徴とする特
許請求の範囲第１項記載の文字・マーク入り射出
成形品の製造方法。[Claims] 1. A base made of synthetic resin in which a plurality of character/mark cavities each having an injection hole are formed is injection molded, and a soft synthetic resin material is applied to each of the cavities through the injection holes. In the manufacturing method of a molded product in which characters and marks are injection molded by filling, an air vent hole is provided at the end of the material flow of each of the character and mark cavities or at a position in front of the end of the material flow to the back side of the base body, and an air vent hole is provided to escape to the back side of the base body A method for manufacturing an injection molded product with characters and marks, characterized by providing an air vent gap or an air pocket between the mold surface and the mold surface. 2. The injection molded product with characters and marks as set forth in claim 1, wherein the air venting gap is formed by a textured surface formed on the back surface of the base or on the mold surface that is in contact with the back surface of the base. manufacturing method. 3. The character set forth in claim 1, wherein the air pocket is formed by a keyhole-shaped slot formed on the back surface of the base body in communication with each air vent hole and having an enlarged portion at the end. Manufacturing method for injection molded products with markings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17486881A JPS5876243A (en) | 1981-10-31 | 1981-10-31 | Manufacture of injection molded item with letter or mark |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17486881A JPS5876243A (en) | 1981-10-31 | 1981-10-31 | Manufacture of injection molded item with letter or mark |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5876243A JPS5876243A (en) | 1983-05-09 |
| JPS6140173B2 true JPS6140173B2 (en) | 1986-09-08 |
Family
ID=15986055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17486881A Granted JPS5876243A (en) | 1981-10-31 | 1981-10-31 | Manufacture of injection molded item with letter or mark |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5876243A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02289319A (en) * | 1989-04-28 | 1990-11-29 | Toyoda Gosei Co Ltd | Manufacture of two-color molded product |
| JPH0450055A (en) * | 1990-06-20 | 1992-02-19 | Takata Kk | Air bag holding cover |
| DE4038598C1 (en) * | 1990-12-04 | 1991-11-28 | Klaus 7312 Kirchheim De Lenhart | |
| US5470108A (en) * | 1992-10-05 | 1995-11-28 | Goode; David P. | Ski pole grip assembly |
| CN100481546C (en) * | 2007-11-26 | 2009-04-22 | 佛山市国星光电股份有限公司 | Power LED with glue-filling formed bottom and manufacturing method thereof |
| GB201107931D0 (en) * | 2011-05-12 | 2011-06-22 | Depuy Ireland | Manufacturing method and product |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57140114A (en) * | 1981-02-25 | 1982-08-30 | Inoue Mtp Co Ltd | Method of unitarily forming indication such as letter or pattern on surface of formed article |
-
1981
- 1981-10-31 JP JP17486881A patent/JPS5876243A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57140114A (en) * | 1981-02-25 | 1982-08-30 | Inoue Mtp Co Ltd | Method of unitarily forming indication such as letter or pattern on surface of formed article |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5876243A (en) | 1983-05-09 |
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