JPH074825B2 - Molding method for automobile decorative mold - Google Patents
Molding method for automobile decorative moldInfo
- Publication number
- JPH074825B2 JPH074825B2 JP61072676A JP7267686A JPH074825B2 JP H074825 B2 JPH074825 B2 JP H074825B2 JP 61072676 A JP61072676 A JP 61072676A JP 7267686 A JP7267686 A JP 7267686A JP H074825 B2 JPH074825 B2 JP H074825B2
- Authority
- JP
- Japan
- Prior art keywords
- molding
- mold
- lower mold
- upper mold
- molding method
- 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
Landscapes
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） この発明は、高周波加熱を利用した自動車用装飾モール
の成形方法に関する。Description: TECHNICAL FIELD The present invention relates to a method for molding an automobile decorative molding using high frequency heating.
（従来の技術） 従来、この種の自動車用装飾モールの成形方法として
は、特開昭58−12729号公報記載の発明のように、発泡
樹脂材よりなるモール体の外表面を、シリコンモールド
内で高周波加熱により無発泡のスキン層とするようにし
た方法がある。(Prior Art) Conventionally, as a method for molding a decorative molding for automobiles of this type, as in the invention described in Japanese Patent Laid-Open No. 58-12729, an outer surface of a molding made of a foamed resin material is used in a silicon mold. There is a method in which a non-foamed skin layer is formed by high frequency heating.
また、特開昭58−3841号公報記載の発明のように、押出
機により押圧された樹脂製のモール本体を冷却後所定長
に切断し、該所定長のモール本体をシリコンモールド内
に入れ高周波成形することによりその底面を自動車の車
体の外観形状に沿うようにした成形法が開示されてい
る。Further, as in the invention described in JP-A-58-3841, a resin molding body pressed by an extruder is cooled and then cut into a predetermined length, and the molding body having the predetermined length is put into a silicon mold to produce a high-frequency wave. A molding method has been disclosed in which the bottom surface is formed so as to conform to the outer shape of an automobile body by molding.
（発明が解決しようとする問題点） しかしながら、このような従来の方法にあつては、以下
に示すような問題点を有している。(Problems to be Solved by the Invention) However, such a conventional method has the following problems.
即ち、上記した両従来例にあつては、発泡樹脂材でなる
モール体や、押出成形されたモール本体を、製造する工
程、並びにそれらを切断，加工する工程などを経た後
に、高周波加熱を施すものであるため、工程数が嵩み、
加工装置全体が高価となり、また、その工程管理が煩雑
である問題点があつた。That is, in both of the above-mentioned conventional examples, high-frequency heating is performed after a step of manufacturing a molding body made of a foamed resin material and a molding body of extrusion molding, and a step of cutting and processing them. Therefore, the number of steps is large,
The processing apparatus as a whole becomes expensive and its process control is complicated.
また、発泡性樹脂材をシリコンモールドに入れて高周波
加熱させた場合、発泡により外観表面を滑らかなスキン
層に形成することが困難である問題点があつた。Further, when the foamable resin material is put into a silicon mold and heated at high frequency, it is difficult to form a smooth skin layer on the outer surface by foaming.
この発明は、かゝる従来の問題点に鑑み案出されたもの
であつて、工程数が少なく、しかも、 ボイド等が無く、確実にスキン層を表面に具備させる、
自動車用装飾モールの成形方法を得んとするものであ
る。The present invention has been devised in view of such conventional problems, has a small number of steps, and There is no void, etc., and a skin layer is surely provided on the surface,
It is intended to obtain a method for forming a decorative molding for automobiles.
（問題点を解決するための手段） この発明は、シリコン樹脂で成形された下型に発泡性樹
脂材料でなるペレツトを充填した後、前記下型に、熱伝
導性の大きい金属で形成された上型を組み付け、前記上
下型内で該ペレツトを高周波加熱して、下型に接する面
にスキン層を形成させることを、その構成としている。(Means for Solving the Problems) According to the present invention, a lower mold formed of a silicone resin is filled with a pellet made of a foamable resin material, and then the lower mold is formed of a metal having a large thermal conductivity. The upper mold is assembled, and the pellet is subjected to high frequency heating in the upper and lower molds to form a skin layer on the surface in contact with the lower mold.
（作用） 下型に充填されたペレツトは、高周波加熱されて融解，
発泡し、発泡エアーは、熱伝導性の大きい上型側に抜け
る。なお、発泡エアーの上型側への移動は、放熱性が高
い上型により、該発泡エアーが冷却されて体積の減少を
起すため、促進される。(Operation) The pellet filled in the lower mold is heated by high frequency to melt,
Foaming occurs and the foaming air escapes to the upper mold side, which has high thermal conductivity. The movement of the foamed air to the upper mold side is accelerated because the foamed air is cooled by the upper mold having high heat dissipation and the volume of the foamed air is reduced.
このため、下型に接する成形面に均質なスキン層が形成
される。Therefore, a uniform skin layer is formed on the molding surface in contact with the lower mold.
（実施例） 以下、この発明に係る自動車用装飾モールの成形方法の
詳細を図面に示す一実施例について説明する。(Example) Hereinafter, one example shown in the drawings in detail of a method for molding an automobile decorative molding according to the present invention will be described.
図中、１は、シリコン樹脂で形成された下型であつて、
２は、この下型１に組み付けられる上型である。In the figure, 1 is a lower mold made of silicone resin,
Reference numeral 2 is an upper mold that is assembled to the lower mold 1.
前記上型２は、熱伝導率の高いアルミニウムで形成され
ていて、放熱性を具備している。The upper mold 2 is made of aluminum having a high thermal conductivity and has heat dissipation.
また、図中、３は、前記上下型2,1を、高周波加熱する
高周波成形機であつて、下型１の下面に設けられた電極
板3aと、上型２の上面に設けられた電極板3bと、両電極
板3a,3bに高周波電圧を印加する高周波電源3cとから構
成されている。In the figure, 3 is a high-frequency molding machine for heating the upper and lower molds 2 and 1 by high-frequency wave. The electrode plate 3a is provided on the lower surface of the lower mold 1 and the electrode is provided on the upper surface of the upper mold 2. It is composed of a plate 3b and a high frequency power source 3c for applying a high frequency voltage to both electrode plates 3a and 3b.
まず、前記下型１には、例えば、塩化ビニル，エチレン
ビニルアセテート，ナイロン等の合成樹脂に、ジニトロ
ソペンタメチレンテトラミン（DPT），アゾジカルボン
アミド（ADCA）などの発泡剤を混ぜて成形されたペレツ
ト４を充填し、次に、上型２を組み付けて前記高周波成
形機３をセツテイングし、次いで、高周波電圧を所定時
間印加した後、冷却させて、モール５の脱型を行なう。First, the lower mold 1 was formed by mixing a synthetic resin such as vinyl chloride, ethylene vinyl acetate, or nylon with a foaming agent such as dinitrosopentamethylenetetramine (DPT) or azodicarbonamide (ADCA). The pellets 4 are filled, then the upper mold 2 is assembled and the high-frequency molding machine 3 is set. Then, a high-frequency voltage is applied for a predetermined time and then cooled to remove the mold 5 from the mold.
前記するように、高周波加熱が行なわれると、ペレツト
４は、約100°〜250℃で発泡し、また発泡エアーは、図
示しないエアー放き孔から型外側に放出される。特に、
圧力の高い発泡エアーは、上型２に熱を吸収されて体積
が減少し圧力低下を起すため、高周波加熱されて発生し
た発泡エアーは円滑に上型１側へ移動を行なう。As described above, when the high frequency heating is performed, the pellet 4 foams at about 100 ° to 250 ° C, and the foamed air is discharged to the outside of the mold from the air discharge hole (not shown). In particular,
Since the foamed air having a high pressure absorbs heat in the upper mold 2 and its volume is reduced to cause a pressure drop, the foamed air generated by high-frequency heating smoothly moves to the upper mold 1 side.
なお、図中、5aは、下型１に接する表面に形成されたス
キン層であり、また、5bは、発泡エアーが通過した孔で
ある。In the figure, 5a is a skin layer formed on the surface in contact with the lower mold 1, and 5b is a hole through which foamed air has passed.
以上、実施例について説明したが、この他に、各種の設
計変更が可能であり、例えば、高周波加熱に要する時
間，電力等を変更することにより、目的に応じた所定強
度のモールを得ることも可能である。Although the embodiments have been described above, various other design modifications are possible. For example, by changing the time required for high-frequency heating, power, etc., it is possible to obtain a molding with a predetermined strength according to the purpose. It is possible.
なお、ペレツトの粒径は、モールの肉厚以下であること
が好ましい。The particle size of the pellets is preferably less than or equal to the wall thickness of the molding.
（発明の効果） 以上の説明で明らかなように、この発明に係る自動車用
装飾モールの成形方法にあつて、工程数が少ないため、
設備コストを低くすることが出来、また、成形されたモ
ールに、所定のスキン層を確実に形成させることが出来
る効果がある。(Effects of the Invention) As is apparent from the above description, in the method for molding a decorative molding for automobiles according to the present invention, since the number of steps is small,
There is an effect that the equipment cost can be reduced, and a predetermined skin layer can be surely formed on the molded molding.
また、成形時にモール内の発泡エアー抜きが容易とな
り、ボイド等の不良を低減させる効果がある。In addition, it is easy to remove air bubbles in the molding during molding, which has an effect of reducing defects such as voids.
第１図は、成形型にペレツトを充填した状態を示す断面
図、第２図は、成形型に高周波成形機をセツテイング
し、高周波加熱した状態を示す部分断面図、第３図は、
モールの横断面図、第４図は、モールの斜視図である。 １…下型、２…上型、３…高周波成形機、４…ペレツ
ト、５…モール。FIG. 1 is a cross-sectional view showing a state where a molding die is filled with pellets, FIG. 2 is a partial cross-sectional view showing a state where a high-frequency molding machine is set on the molding die, and high-frequency heating is performed, and FIG.
FIG. 4 is a cross-sectional view of the molding, and FIG. 4 is a perspective view of the molding. 1 ... Lower mold, 2 ... Upper mold, 3 ... High frequency molding machine, 4 ... Pellet, 5 ... Mold.
Claims (1)
脂材料でなるペレツトを充填した後、前記下型に、熱伝
導性の大きい金属で形成された上型を組み付け、前記上
下型内で該ペレツトを高周波加熱して、下型に接する面
にスキン層を形成させることを特徴とする自動車用装飾
モールの成形方法。1. A lower mold made of a silicone resin is filled with a pellet made of a foaming resin material, and then an upper mold made of a metal having a large thermal conductivity is assembled to the lower mold, and the upper mold and the lower mold are assembled. 2. A method for molding a decorative molding for automobiles, characterized in that the pellet is heated at high frequency to form a skin layer on the surface in contact with the lower mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61072676A JPH074825B2 (en) | 1986-03-31 | 1986-03-31 | Molding method for automobile decorative mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61072676A JPH074825B2 (en) | 1986-03-31 | 1986-03-31 | Molding method for automobile decorative mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62227728A JPS62227728A (en) | 1987-10-06 |
| JPH074825B2 true JPH074825B2 (en) | 1995-01-25 |
Family
ID=13496206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61072676A Expired - Lifetime JPH074825B2 (en) | 1986-03-31 | 1986-03-31 | Molding method for automobile decorative mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH074825B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0632524B1 (en) * | 1993-06-30 | 2001-07-25 | Murata Manufacturing Co., Ltd. | Method of producing a dielectric lens for an antenna and dielectric lens obtainable by said method |
-
1986
- 1986-03-31 JP JP61072676A patent/JPH074825B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62227728A (en) | 1987-10-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH078505B2 (en) | Method for producing plastic foam | |
| GB2114047A (en) | Manufacturing a protective moulding for an automobile | |
| US4596684A (en) | Method for manufacturing low density rubber foamed body | |
| JPH074825B2 (en) | Molding method for automobile decorative mold | |
| EP0071662B1 (en) | Method for manufacturing low density rubber foamed body | |
| JPS58142828A (en) | Manufacture of inside foamed molded product | |
| JPS6322631A (en) | Preparation of decoration molding for automobiles | |
| JPH11236403A (en) | Vulcanizing and molding of foamed vulcanized rubber | |
| JPS60157837A (en) | Manufacture of molding | |
| JP2000210969A (en) | Foam injection molding method and apparatus | |
| JPS6330239A (en) | Preparation of large-sized decorative molding | |
| JPH0455585B2 (en) | ||
| JPH0739105B2 (en) | Mold for high frequency molding | |
| JPH0214892B2 (en) | ||
| JP2946259B2 (en) | Mold temperature control method and mold temperature control device for reaction injection molding apparatus | |
| US4054626A (en) | Method for forming bodies of foamed plastisol resin | |
| JPS6071215A (en) | Manufacture of foamed product molded in cross-linking polyolefine | |
| JPH03284929A (en) | Manufacture of hollow resin molded item | |
| JPH0446728B2 (en) | ||
| JPH0698693B2 (en) | Manufacturing method of automobile decorative mold | |
| JPS6051416B2 (en) | Crosslinked foam extrusion method | |
| JPS6219301B2 (en) | ||
| JPH0387216A (en) | Manufacture of resin molded product | |
| JPH07205194A (en) | Method for manufacturing resin laminate | |
| JPS63303710A (en) | Manufacture of decorative molding for automobile |