JP2872319B2 - Injection molding for decoration - Google Patents
Injection molding for decorationInfo
- Publication number
- JP2872319B2 JP2872319B2 JP153190A JP153190A JP2872319B2 JP 2872319 B2 JP2872319 B2 JP 2872319B2 JP 153190 A JP153190 A JP 153190A JP 153190 A JP153190 A JP 153190A JP 2872319 B2 JP2872319 B2 JP 2872319B2
- Authority
- JP
- Japan
- Prior art keywords
- injection
- molded body
- decorative
- molded article
- adhesive
- 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
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
- B29C45/1703—Introducing an auxiliary fluid into the mould
- B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow 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
- B29C45/14—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
- B29C45/14778—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 the article consisting of a material with particular properties, e.g. porous, brittle
- B29C45/14811—Multilayered 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/021—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
- B29C2043/026—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface having functional projections, e.g. fasteners
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】 ［産業上の利用分野］ 本発明は、自動者のエンブレム、ネームプレート等の
ように、成形体基盤上面に文字、模様等の装飾用凸部を
有し、下面を接着して使用される装飾用の射出成形体に
関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention has a decorative base such as a character or a pattern on the upper surface of a molded body base, such as an emblem or a name plate of an automatic operator, and has a lower surface formed thereon. The present invention relates to an injection molded article for decoration used by bonding.
［従来技術］ 従来、自動車のエンブレム、ネームプレート等の装飾
用の射出成形体としては、次のような構造のものが知ら
れている。[Prior Art] Conventionally, as an injection molded article for decoration such as an emblem and a name plate of an automobile, the following is known.
（１）第３図に示されるように、成形体基盤上面に中実
の装飾用凸部が設けられている一体構造の成形体であ
り、成形体基盤下面に接着剤を設けたもの。(1) As shown in FIG. 3, a molded body having an integral structure in which a solid decorative projection is provided on the upper surface of the molded body base, and an adhesive is provided on the lower surface of the molded body base.
（２）第４図に示されるように、装飾用凸部の裏側部分
だけ成形体基盤がくり抜かれており、くり抜かれた空間
部７も含めて成形体基盤下面に接着剤を設けたもの。(2) As shown in FIG. 4, the molded body base is hollowed out only on the back side of the decorative projection, and an adhesive is provided on the lower surface of the molded body base including the hollowed space 7.
［発明が解決しようとする課題］ しかしながら、上記従来の装飾用射出成形体では次の
ような問題が残されている。[Problems to be Solved by the Invention] However, the following problems remain in the above-mentioned conventional decorative injection-molded article.
（１）の射出成形体は、中実の装飾用凸部が設けられ
ている部分が他の部分より厚いため、該凸部の溶融樹脂
の冷却固化が他の部分より遅くなる。このため、溶融樹
脂の収縮が装飾用凸部の上面と成形体基盤下面に集中
し、第３図の破線のようなヒケが発生し、外観不良が生
じる。また、接着剤が設けられている接着面と、被接着
素材との間に成形体基盤下面のヒケのために空間ができ
るため、接着力が弱まる。In the injection molded article of (1), since the portion where the solid decorative convex portion is provided is thicker than other portions, the cooling and solidification of the molten resin in the convex portion is slower than other portions. For this reason, the shrinkage of the molten resin is concentrated on the upper surface of the decorative convex portion and the lower surface of the molded body base, causing sink marks as shown by broken lines in FIG. 3 and causing poor appearance. In addition, since a space is formed between the bonding surface on which the adhesive is provided and the material to be bonded due to sinks on the lower surface of the molded body base, the bonding strength is weakened.
（２）の成形体はヒケ防止のために、装飾用凸部が設
けられている裏側部分だけ凸部の形状に沿って成形体基
盤がくり抜かれて、成形体基盤に大きな空間部７ができ
るため、空間部７も含めて成形体基盤に設けられた接着
剤は、空間部７の部分だけ押圧力がないため、接着力が
弱まる。In the molded article of (2), in order to prevent sink marks, the molded article base is cut out along the shape of the convex portion only on the back side where the decorative convex section is provided, and a large space 7 is formed in the molded article base. Therefore, the adhesive provided on the molded body base including the space 7 has no pressing force only in the space 7, and thus the adhesive strength is weakened.
［問題を解決するための手段］ 前記問題を解決するために、本発明で講じられた手段
は、成形体基盤上面に装飾用凸部を有し、この装飾用凸
部内が中空部となっていることを特徴とする射出成形体
とするものである。[Means for Solving the Problem] In order to solve the above problem, a measure taken in the present invention has a decorative convex portion on the upper surface of the molded body base, and the inside of the decorative convex portion becomes a hollow portion. Injection molded article characterized in that:
［作用］ 射出成形体の装飾用凸部構造部に中空部を設けること
で、成形体全体の樹脂厚を均一にし、射出された溶融樹
脂の冷却による収縮を均一にすることにより、装飾用凸
部及び成形体基盤下面のヒケの発生を防止する。[Operation] By providing a hollow portion in the decorative convex structure structure of the injection molded body, the resin thickness of the entire molded body is made uniform, and the shrinkage of the injected molten resin due to cooling is made uniform, whereby the decorative convex structure is formed. Prevent sink marks on the part and the lower surface of the molded product base.
［実施例］ 次に、第１図、第２図を用いて本発明を詳細に説明す
る。Example Next, the present invention will be described in detail with reference to FIGS.
第１図に示すように、本発明の装飾用凸部２を有する
射出成形体１は、成形体基盤３の上面に装飾用凸部２が
設けられており、装飾用凸部構造の内部に中空部４を有
する構造である。As shown in FIG. 1, the injection-molded article 1 having the decorative convex portion 2 of the present invention has the decorative convex portion 2 provided on the upper surface of the molded body base 3, and the decorative convex portion structure is provided inside the decorative convex portion structure. This is a structure having a hollow portion 4.
当該射出成形体１を他種素材と接着させる場合は、成
形体基盤３の下面に接着剤５と離型紙６を設けることに
より、接着の際は離型剤を剥して、接着させることがで
きる。または、予め接着剤を設けておかなくても、接着
するときに、接着剤を塗布して接着することもできる。When the injection molded article 1 is to be bonded to another kind of material, the adhesive 5 and the release paper 6 are provided on the lower surface of the molded body base 3 so that the release agent can be peeled off and bonded at the time of bonding. . Alternatively, even if an adhesive is not provided in advance, an adhesive can be applied and bonded when bonding.
第２図に、本発明の射出成形体１の一例である自動車
のネームプレートを示すが、第２図に示されるように、
装飾用凸部２は複数であっても良い。また、接着剤５と
しては、両面テープ等があげられる。FIG. 2 shows a name plate of an automobile which is an example of the injection-molded article 1 of the present invention. As shown in FIG.
There may be a plurality of decorative projections 2. The adhesive 5 may be a double-sided tape or the like.
射出成形体１は熱可塑性樹脂、熱可塑性エラストマ
ー、これらと従来公知の添加剤やフィラーとの配合物等
の溶融樹脂で成形される。The injection molded body 1 is molded from a molten resin such as a thermoplastic resin, a thermoplastic elastomer, or a blend of these with a conventionally known additive or filler.
成形方法は、成形体凸部に対応した凹部を有するキャ
ビティ内へ溶融樹脂注入位置から溶融樹脂を注入する。In the molding method, the molten resin is injected from a molten resin injection position into a cavity having a concave portion corresponding to the convex portion of the molded body.
キャビティ内への溶融樹脂の注入時もしくは注入後
に、キャビティ凹部の所定の位置に中空部形成流体を圧
入し、溶融樹脂をキャビティ内壁に圧着させ、強制的に
中空部４を成形する。During or after the injection of the molten resin into the cavity, the hollow portion forming fluid is press-fitted into a predetermined position of the cavity concave portion, the molten resin is pressed against the inner wall of the cavity, and the hollow portion 4 is forcibly formed.
中空部形成流体としては、例えば窒素、炭酸ガス、空
気等のように、無害で成形温度及び射出圧力下で液化し
ないガスが一般的であるが、溶融合成樹脂と相溶性のな
い液体やオリゴマーを用いることも出来る。As the hollow part forming fluid, a gas that is harmless and does not liquefy at the molding temperature and the injection pressure, such as nitrogen, carbon dioxide gas, air, etc., is generally used, but a liquid or oligomer that is not compatible with the molten synthetic resin is used. Can also be used.
上記のようにして中空部４を成形した後は、中空部形
成流体の圧力を維持したままキャビティ内の溶融樹脂を
冷却固化させ、その後中空部４内の中空部成形流体を排
出してから型を開いて成形体を取り出す。After molding the hollow part 4 as described above, the molten resin in the cavity is cooled and solidified while maintaining the pressure of the hollow part forming fluid, and then the hollow part forming fluid in the hollow part 4 is discharged. And take out the compact.
［発明の効果］ 射出成形体の装飾用凸部構造部に中空部を設けること
で、ヒケがなく、平滑性のある成形体表面が得られる。[Effect of the Invention] By providing a hollow portion in the decorative convex structure of the injection molded body, a smooth molded body surface without sink marks can be obtained.
また、成形体基盤下面にヒケによる空間がないので、
大きな接着面が得られると共に、他種素材と接着すると
きの押圧力が接着面全体にむらなくかかるので、強い接
着力が得られ、剥離し難くなる。Also, since there is no space due to sink marks on the lower surface of the molded substrate,
A large adhesive surface is obtained, and a pressing force when adhering to another kind of material is applied evenly to the entire adhesive surface, so that a strong adhesive force is obtained and peeling is difficult.
第１図は、内部が中空構造である装飾用凸部を有する射
出成形体の断面図、第２図は、射出成形体の一例、第３
図は、内部が中実の装飾用凸部を有する射出成形体、第
４図は、内部に空間部を有する装飾用凸部を有する射出
成形体である。 １……射出成形体、２……装飾用凸部 ３……成形体基盤、４……中空部 ５……接着剤、６……離型紙 ７……空間部FIG. 1 is a cross-sectional view of an injection-molded article having a decorative convex portion having a hollow structure inside. FIG. 2 is an example of an injection-molded article.
The figure shows an injection-molded article having a decorative projection having a solid inside, and FIG. 4 shows an injection-molded article having a decoration projection having a space therein. DESCRIPTION OF SYMBOLS 1 ... Injection molding, 2 ... Decorative convex part 3 ... Mold base, 4 ... Hollow part 5 ... Adhesive, 6 ... Release paper 7 ... Space part
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭55−59936（ＪＰ，Ａ) 特開 昭57−91241（ＪＰ，Ａ) 実開 昭57−78917（ＪＰ，Ｕ) 特表 平３−502192（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) B29C 45/00 - 45/84 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-55-59936 (JP, A) JP-A-57-91241 (JP, A) JP-A-57-78917 (JP, U) 502192 (JP, A) (58) Field surveyed (Int. Cl. 6 , DB name) B29C 45/00-45/84
Claims (1)
装飾用凸部内が中空部となっていることを特徴とする射
出成形体。1. An injection-molded article having a decorative convex portion on the upper surface of a molded product substrate, wherein the decorative convex portion has a hollow portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP153190A JP2872319B2 (en) | 1990-01-10 | 1990-01-10 | Injection molding for decoration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP153190A JP2872319B2 (en) | 1990-01-10 | 1990-01-10 | Injection molding for decoration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03207620A JPH03207620A (en) | 1991-09-10 |
| JP2872319B2 true JP2872319B2 (en) | 1999-03-17 |
Family
ID=11504106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP153190A Expired - Lifetime JP2872319B2 (en) | 1990-01-10 | 1990-01-10 | Injection molding for decoration |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2872319B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0671798A (en) * | 1992-08-27 | 1994-03-15 | Sumitomo Chem Co Ltd | Laminate body |
| JP2799689B2 (en) * | 1995-05-26 | 1998-09-21 | 日精樹脂工業株式会社 | Program setting method for control device for injection molding machine |
| JP2009031284A (en) * | 2008-07-22 | 2009-02-12 | Toyota Motor Corp | Cover for radar apparatus of vehicle |
-
1990
- 1990-01-10 JP JP153190A patent/JP2872319B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03207620A (en) | 1991-09-10 |
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