JPH0331123B2 - - Google Patents
Info
- Publication number
- JPH0331123B2 JPH0331123B2 JP58028934A JP2893483A JPH0331123B2 JP H0331123 B2 JPH0331123 B2 JP H0331123B2 JP 58028934 A JP58028934 A JP 58028934A JP 2893483 A JP2893483 A JP 2893483A JP H0331123 B2 JPH0331123 B2 JP H0331123B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- molding
- time
- manufacturing
- parts
- 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
- B29C45/16—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
- B29C2045/1682—Making multilayered or multicoloured articles preventing defects
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
Description
【発明の詳細な説明】
この発明は複数の樹脂部分からなる合成樹脂成
形品の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a synthetic resin molded article consisting of a plurality of resin parts.
車両用のボデーサイドモールデイングやバンパ
ーなどのように、装飾性を有する合成樹脂成形品
として、異なる色調を有する複数の樹脂部分から
なる複合状態の成形品が使用されている。このよ
うな成形品には、装飾性を高めるために、ベース
となる樹脂部分に、着色あるいは金属光沢等によ
り識別性を高めた他の樹脂部分を複合させたもの
があり、このような合成樹脂成形品の製造方法と
して、異色の樹脂を使用した多重射出成形法があ
る。 BACKGROUND ART Composite molded products consisting of a plurality of resin parts having different colors are used as decorative synthetic resin molded products such as body side moldings and bumpers for vehicles. Some of these molded products are made by combining the base resin part with other resin parts that are colored or have metallic luster to enhance their distinctiveness. As a method for manufacturing molded products, there is a multiple injection molding method that uses different colored resins.
第１図はこの種の成形品を示す斜視図、第２図
は従来の製造方法により製造した成形品の正面
図、第３図は射出成形型の垂直断面図である。図
面において、１は成形品で、自動車用ボデーサイ
ドモールデイングの例を図示しており、基体とな
る帯状の第１樹脂部分２、およびその外表面に形
成された異色樹脂からなる第２樹脂部分３の複合
体よりなり、両樹脂部分２，３は相溶性のある樹
脂が溶着した状態となつている。 FIG. 1 is a perspective view showing this type of molded product, FIG. 2 is a front view of a molded product manufactured by a conventional manufacturing method, and FIG. 3 is a vertical sectional view of an injection mold. In the drawings, reference numeral 1 denotes a molded product, which is an example of body side molding for an automobile, and includes a strip-shaped first resin portion 2 serving as a base, and a second resin portion made of a different colored resin formed on the outer surface of the first resin portion 2. 3, and both resin parts 2 and 3 are in a state in which compatible resins are welded together.
４は回転体であつて、両側にコア型５，６が形
成され、コア型５，６に対向してキヤビテイ型
７，８が前進または後退できるように配置されて
いる。コア型５または６とキヤビテイ型７との間
には、第１樹脂部分２を成形するキヤビテイ空間
９が形成され、コア型５または６とキヤビテイ型
８との間には、第１樹脂部分２を形成した状態で
形締めして、第２樹脂部分３を形成するキヤビテ
イ空間１０が形成されている。１１，１２はスプ
ルー、１３，１４はゲートである。 Reference numeral 4 denotes a rotating body having core molds 5 and 6 formed on both sides thereof, and facing the core molds 5 and 6 and disposed so that cavity molds 7 and 8 can move forward or backward. A cavity space 9 for molding the first resin portion 2 is formed between the core mold 5 or 6 and the cavity mold 7, and a cavity space 9 for molding the first resin portion 2 is formed between the core mold 5 or 6 and the cavity mold 8. A cavity space 10 in which the second resin portion 3 is formed is formed by clamping the formed state. 11 and 12 are sprues, and 13 and 14 are gates.
成形品１の製造方法は、コア型５，６を第３図
の位置においてキヤビテイ型７，８を前進させて
型締めし、射出ノズル（図示せず）からスプルー
１１およびゲート１３を通してキヤビテイ空間９
に第１の樹脂、例えば黒色のポリプロピレン樹脂
を射出して第１樹脂部分２を形成する。コア型６
およびキヤビテイ型８間の第１樹脂部分２は、上
記のようにしてキヤビテイ空間９に形成された第
１樹脂部分２が型開き後、回転体４の矢印Ａ方向
の回転に伴つて、コア型５に付着したまま180゜回
転して第３図の位置にきたものであり、前記と同
様にスプルー１２およびゲート１４を通して、キ
ヤビテイ空間１０に異色の第２の樹脂、例えばオ
レンジ色のポリプロピレン樹脂を射出することに
より、第２樹脂部分３を形成する。冷却後キヤビ
テイ型７，８を後退させて型開きし、押出ピン
（図示せず）により、成形品１を離脱させ、コア
型５側の第１樹脂部分２はコア型５に付着させた
ままコア型６の位置まで、矢印Ａと逆方向に180゜
回転させ、再び型締めを行なつて射出成形を行
い、これを繰り返えす。 The method for producing the molded product 1 is to place the core molds 5 and 6 in the position shown in FIG.
The first resin portion 2 is formed by injecting a first resin, for example, a black polypropylene resin. core type 6
After the first resin portion 2 formed in the cavity space 9 as described above is opened, the first resin portion 2 between the cavity mold 8 and the cavity mold 8 is formed into a core mold as the rotating body 4 rotates in the direction of arrow A. 5, it is rotated 180 degrees to the position shown in FIG. The second resin portion 3 is formed by injection. After cooling, the cavity molds 7 and 8 are moved back to open the mold, and the molded product 1 is released using an extrusion pin (not shown), leaving the first resin portion 2 on the core mold 5 side attached to the core mold 5. Rotate 180 degrees in the opposite direction of arrow A to the position of core mold 6, close the mold again, perform injection molding, and repeat this process.
第１樹脂部分２を形成する第１の樹脂および第
２樹脂部分を形成する第２の樹脂は相溶性のある
ものが使用され、一般には色相（顔料）が異なる
だけで、同じ樹脂組成のものが使用されている。 The first resin that forms the first resin portion 2 and the second resin that forms the second resin portion are compatible, and generally have the same resin composition but differ in hue (pigment). is used.
ところが、このような従来の製造方法で製造し
た成形品１は、第２図に示すように、第２樹脂部
分３側に湾曲して変形し、車両用モールデイング
等の場合、取付に不具合が生じるなどの問題点が
あつた。従来はこのような湾曲は合成樹脂の射出
成形に当然伴うものと考えられ、成形後のアニー
リング等により矯正することが行われていたが、
良好な結果を得ることはできなかつた。 However, as shown in FIG. 2, the molded product 1 manufactured by such a conventional manufacturing method is curved and deformed toward the second resin portion 3, which may cause installation problems when used as a molding for a vehicle, etc. There were some problems, such as: In the past, such curvature was thought to be a natural result of injection molding of synthetic resins, and was corrected by post-molding annealing, etc.
It was not possible to obtain good results.
この発明は、このような従来の問題点に着目し
てなされたものであり、成形収縮率の異なる樹脂
を使用して多重射出成形を行うことにより、上記
問題点を解決することを目的としている。 This invention was made with attention to these conventional problems, and aims to solve the above problems by performing multiple injection molding using resins with different molding shrinkage rates. .
この発明は、複数の樹脂部分からなる合成樹脂
成形品を多重射出成形により製造する方法におい
て、所定の成形収縮率をもつ第１の樹脂により第
１の樹脂部分を射出成形する工程と、所定時間経
過後、第１の樹脂部分の成形収縮の途中で、それ
以後の第１の樹脂部分の成形収縮率にほぼ等しい
成形収縮率をもつ第２の樹脂により第２の樹脂部
分を射出成形し、両樹脂部分を一体化する工程と
を含む合成樹脂成形品の製造方法である。 This invention provides a method for manufacturing a synthetic resin molded article consisting of a plurality of resin parts by multiple injection molding, which includes the steps of injection molding a first resin part with a first resin having a predetermined molding shrinkage rate, and a predetermined time period. After the elapsed time, during the molding shrinkage of the first resin part, injection molding the second resin part with a second resin having a molding shrinkage rate approximately equal to the molding shrinkage rate of the first resin part after that, This is a method for manufacturing a synthetic resin molded product, including a step of integrating both resin parts.
従来の製造方法における成形品１の変形の原因
を調べたところ、第１樹脂部分２および第２樹脂
部分３の収縮の時間的なずれによるものであるこ
とがわかつた。 When the cause of the deformation of the molded product 1 in the conventional manufacturing method was investigated, it was found that it was due to a time lag in the shrinkage of the first resin part 2 and the second resin part 3.
すなわち、一般に合成樹脂の射出成形品には、
それぞれの樹脂組成によつて一定の成形収縮率が
あり、成形後一定の時間内に一定の収縮が起こ
る。このため同じ樹脂組成の樹脂は、単に顔料が
相違するだけではほぼ同じ成形収縮率となり、こ
れらを所定時間間隔で多重成形すると、収縮はそ
れぞれの成形直後から始まり、それぞれの時間的
なずれによる収縮の差が変形となつて現われる。 In other words, synthetic resin injection molded products generally have
Each resin composition has a certain molding shrinkage rate, and a certain shrinkage occurs within a certain time after molding. For this reason, resins with the same resin composition will have almost the same molding shrinkage rate if the pigments are simply different, and if these are multiple-molded at a predetermined time interval, the shrinkage will start immediately after each molding, and the shrinkage due to the time lag between each resin. The difference appears as deformation.
第４図は従来の成形品における時間と収縮量の
変化を示すグラフであり、A0は第１の樹脂射出
時点、B0は第２の樹脂射出時点、A1は第１樹脂
部分２の収縮終了時点、B1は第２樹脂部分３の
収縮終了時点におけるそれぞれの収縮量を示して
いる。第１の樹脂および第２の樹脂が同一の成形
収縮率、例えばｋ／1000である場合、第１の樹脂
をA0の時点で射出して第１樹脂部分２を形成し、
その収縮が完了していないＴ時間経過後のB0の
時点で第２の樹脂を射出して第２樹脂部分３を形
成すると、第１樹脂部分２の収縮が完了した時点
A1を通過しても第２樹脂部分３の収縮は継続し、
このため両樹脂部分２，３の界面に引張力が発生
して、成形品１に第２図のような変形が起こる。 FIG. 4 is a graph showing the change in shrinkage amount over time in a conventional molded product, where A 0 is the time of the first resin injection, B 0 is the time of the second resin injection, and A 1 is the time of the first resin part 2. B1 indicates the amount of contraction of the second resin portion 3 at the end of contraction. When the first resin and the second resin have the same molding shrinkage rate, for example k/1000, the first resin is injected at time A 0 to form the first resin part 2,
If the second resin is injected to form the second resin part 3 at time B 0 after the elapse of T time when the shrinkage is not completed, the time when the shrinkage of the first resin part 2 is completed.
Even after passing through A 1 , the contraction of the second resin portion 3 continues,
Therefore, a tensile force is generated at the interface between the resin parts 2 and 3, and the molded product 1 is deformed as shown in FIG.
本発明の製造方法は、一定の成形収縮率をもつ
第１の樹脂で第１樹脂部分２を形成するのは従来
と同じであるが、B0の時点で第２の樹脂を射出
する際、第１樹脂部分２のB0時点以後の収縮率
にほぼ等しい成形収縮率をもつ樹脂を第２の樹脂
として使用することにより、成形品１の変形を防
止する。第５図は本発明の一実施例における時間
と収縮量の変化を示すグラフであり、A0、B0、
A1、B1は第４図と同一のものを示す。 The manufacturing method of the present invention is the same as the conventional method in that the first resin part 2 is formed with a first resin having a constant molding shrinkage rate, but when injecting the second resin at the time of B0 , By using, as the second resin, a resin having a molding shrinkage rate approximately equal to the shrinkage rate of the first resin portion 2 after time B0 , deformation of the molded article 1 is prevented. FIG. 5 is a graph showing changes in the amount of contraction over time in an embodiment of the present invention, in which A 0 , B 0 ,
A 1 and B 1 are the same as in FIG. 4.
第５図において、本来の成形収縮率、例えば
ｋ／1000の第１の樹脂をA0の時点で射出して第
１樹脂部分２を形成し、所定のＴ時間経過後の、
第１樹脂部分２の収縮量がα／1000（ｋ＞α）に
至つたB0の時点で、第１樹脂部分２のB0時点以
後の収縮率にほぼ等しい（ｋ−α）／1000の成形
収縮率をもつた異色の第２の樹脂をを射出して、
第１樹脂部分２と一体化するように第２樹脂部分
３を形成する。B0時点以後の収縮率は両樹脂部
分２，３とも（ｋ−α）／1000で同じであるた
め、両樹脂部分２，３の収縮完了後の大きさは同
じとなり、界面に引張力を先ずることなく、変形
は生じない。第５図ではA1およびB1が時間的に
も一致した場合を示しているが、時間的に差があ
る場合、すなわちB0時点から収縮完了時点まで
の時間に差がある場合でも、最終的な収縮量に差
がなければ、最終製品の変形は防止される。 In FIG. 5, a first resin having an original molding shrinkage rate of, for example, k/1000 is injected at a time point A0 to form a first resin portion 2, and after a predetermined time T has elapsed,
At B 0 when the amount of shrinkage of the first resin portion 2 reaches α/1000 (k>α), the shrinkage rate of the first resin portion 2 after B 0 is approximately equal to (k - α)/1000. By injecting a second resin with a unique molding shrinkage rate,
The second resin portion 3 is formed so as to be integrated with the first resin portion 2. B Since the shrinkage rate after time 0 is the same for both resin parts 2 and 3 at (k-α)/1000, the size of both resin parts 2 and 3 after the contraction is completed is the same, and a tensile force is applied to the interface. No deformation occurs without any damage. Figure 5 shows the case where A 1 and B 1 match in time, but even if there is a difference in time, that is, there is a difference in time from B 0 to the time of completion of contraction, the final If there is no difference in the amount of shrinkage, deformation of the final product is prevented.
樹脂の成形収縮率の調節は、樹脂成分やフイラ
ー等を変えることにより行うことができるが、両
樹脂部分２，３に相溶性をもたせるには樹脂成分
を同じにするのが望ましく、このためフイラーそ
の他の添加剤を変えることにより成形収縮率を変
えるのが望ましい。 The molding shrinkage rate of the resin can be adjusted by changing the resin components, filler, etc., but in order to make both resin parts 2 and 3 compatible, it is desirable to have the same resin components. It is desirable to change the molding shrinkage rate by changing other additives.
成形方法は第３図のような回転コア型を有する
射出成形型を使用すると、A0、B0間の時間Ｔを
一定にできるから好ましい。この場合の射出成形
の操作は前述のものと同様である。キヤビテイ型
７によつて形成された第１樹脂部分２は、コア型
５，６に付着した状態では、少なくとも付着部分
において強制的に収縮を阻止されているが、付着
部分から離れた部分では収縮が生じており、また
全体の収縮が付着力により阻止されている場合で
も、収縮に対応する内部応力が発生しており、コ
ア型５，６からの離脱により収縮が顕在化する。 As for the molding method, it is preferable to use an injection molding mold having a rotating core mold as shown in FIG. 3 because the time T between A 0 and B 0 can be kept constant. The injection molding operation in this case is similar to that described above. When the first resin portion 2 formed by the cavity mold 7 is attached to the core molds 5 and 6, it is forcibly prevented from shrinking at least in the attached portion, but it is prevented from shrinking in the portion away from the attached portion. Even if the entire shrinkage is prevented by the adhesive force, an internal stress corresponding to the shrinkage is generated, and the shrinkage becomes obvious when the core molds 5 and 6 are separated.
成形装置としては第３図のものに限らず、他の
ものでもよく、例えば独立した複数の成形装置を
使用し、第１樹脂部分２を移し変えながら、一定
の時間差で成形を行うようにしてもよい。 The molding apparatus is not limited to the one shown in FIG. 3, but may be other types. For example, a plurality of independent molding apparatuses may be used, and the first resin portion 2 may be transferred and molded at a constant time difference. Good too.
なお、以上の説明は２種類の樹脂部分２，３の
場合について説明したが、３種類以上でもよく、
また各樹脂部分２，３の構成、比率、色合等は任
意に選択できる。例えば一方の樹脂部分が基体と
しての主要部分を形成する場合でも、あるいは双
方が同等比率の構成部分となる場合でもよく、ま
た双方の樹脂部分を層状に複合する場合でも、あ
るいはスポツト的に複合する場合でもよい。 In addition, although the above explanation was about the case of two types of resin parts 2 and 3, three or more types may be used.
Further, the structure, ratio, color, etc. of each resin portion 2, 3 can be arbitrarily selected. For example, one resin part may form the main part as a base, or both may be constituent parts in equal proportions, or both resin parts may be composited in a layered manner, or they may be composited in spots. It may be the case.
本発明の対象となる成形品は車両用のものに限
定されず、他の用途の合成樹脂成形品でもよい。
また本発明は、異色の樹脂を一体化して、塗装あ
るいは部品取付けに代える場合とか、金属メツキ
の付着する材料と付着しない材料を一体化させた
後、樹脂メツキ法により、一部に金属光沢を得る
場合など、異なつた種類の樹脂部分の複合形態か
らなるあらゆる合成樹脂成形品の製造に適用でき
る。 The molded products to which the present invention is applied are not limited to those for vehicles, but may also be synthetic resin molded products for other uses.
In addition, the present invention can be used to integrate resins of different colors in place of painting or attaching parts, or to integrate materials to which metal plating will adhere and materials to which metal plating will not adhere, and then apply a resin plating method to impart a metallic luster to a part. It can be applied to the production of all kinds of synthetic resin molded products consisting of a composite form of different types of resin parts.
以上説明してきたように、この発明によれば、
その構成を、所定の成形収縮率をもつ第１の樹脂
により第１の樹脂部分を射出成形し、所定時間経
過後、第１の樹脂部分の成形収縮の途中で、それ
以後の第１の樹脂部分の成形収縮率とほぼ等しい
成形収縮率をもつ第２の樹脂により第２の樹脂部
分を射出成形し、両樹脂部分を一体化するように
したので、第２の樹脂射出後の両樹脂部分の成形
収縮率をほぼ等しくすることができ、これにより
両樹脂部分の成形収縮率の差による湾曲等の変形
の発生を防止でき、外観、取付性などに優れた合
成樹脂成形品を得ることができるという効果が得
られる。また相溶性のある樹脂を使用すれば、一
体化強度を大きくでき、第１の樹脂部分をコア型
に付着させて移動しながら成形を行えば、時間差
の調整を行えるなどの効果がある。 As explained above, according to this invention,
In this structure, a first resin part is injection molded using a first resin having a predetermined molding shrinkage rate, and after a predetermined time has elapsed, during the molding shrinkage of the first resin part, the first resin part is The second resin part is injection molded using a second resin having a molding shrinkage rate that is almost equal to that of the first part, and both resin parts are integrated, so that both resin parts after the second resin injection are It is possible to make the molding shrinkage rates of the two resin parts almost equal, thereby preventing the occurrence of deformation such as curvature due to the difference in molding shrinkage rate of both resin parts, and making it possible to obtain a synthetic resin molded product with excellent appearance, ease of installation, etc. You can get the effect that you can. Further, if compatible resins are used, the strength of the unit can be increased, and if the first resin part is attached to the core mold and molded while moving, it is possible to adjust the time difference.
第１図は成形品の斜視図、第２図は従来の成形
品の正面図、第３図は成形型の垂直断面図、第４
図は従来の製造方法における時間と収縮量の関係
を示すグラフ、第５図は本発明の一実施例におけ
る時間と収縮量の関係を示すグラフである。
各図中、同一符号は同一または相当部分を示
し、１は成形品、２は第１樹脂部分、３は第２樹
脂部分、４は回転体、５，６はコア型、７，８は
キヤビテイ型である。
Figure 1 is a perspective view of a molded product, Figure 2 is a front view of a conventional molded product, Figure 3 is a vertical sectional view of the mold, and Figure 4 is a vertical sectional view of the mold.
The figure is a graph showing the relationship between time and shrinkage amount in a conventional manufacturing method, and FIG. 5 is a graph showing the relationship between time and shrinkage amount in an embodiment of the present invention. In each figure, the same reference numerals indicate the same or equivalent parts, 1 is the molded product, 2 is the first resin part, 3 is the second resin part, 4 is the rotating body, 5 and 6 are the core mold, and 7 and 8 are the cavities. It is a type.
Claims (1)
重射出成形により製造する方法において、所定の
成形収縮率をもつ第１の樹脂により第１の樹脂部
分を射出成形する工程と、所定時間経過後、第１
の樹脂部分の成形収縮の途中で、それ以後の第１
の樹脂部分の成形収縮率にほぼ等しい成形収縮率
をもつ第２の樹脂により第２の樹脂部分を射出成
形し、両樹脂部分を一体化する工程とを含む合成
樹脂成形品の製造方法。 ２ 第１および第２の樹脂は相溶性のある樹脂で
ある特許請求の範囲第１項記載の合成樹脂成形品
の製造方法。 ３ 第１の樹脂部分はコア型に付着したまま移動
し、他のキヤビテイ型との間に第２の樹脂部分を
形成するようにした特許請求の範囲第１項または
第２項記載の合成樹脂成形品の製造方法。 ４ コア型は回転式である特許請求の範囲第３項
記載の合成樹脂成形品の製造方法。[Scope of Claims] 1. A method for manufacturing a synthetic resin molded product consisting of a plurality of resin parts by multiple injection molding, comprising the steps of injection molding a first resin part with a first resin having a predetermined molding shrinkage rate; , after a predetermined time, the first
During the molding shrinkage of the resin part, the first
A method for manufacturing a synthetic resin molded article, comprising the steps of injection molding a second resin part with a second resin having a molding shrinkage rate approximately equal to that of the resin part, and integrating both resin parts. 2. The method for producing a synthetic resin molded article according to claim 1, wherein the first and second resins are compatible resins. 3. The synthetic resin according to claim 1 or 2, wherein the first resin part moves while adhering to the core mold and forms a second resin part between it and another cavity mold. Method of manufacturing molded products. 4. The method for manufacturing a synthetic resin molded product according to claim 3, wherein the core mold is rotary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58028934A JPS59155022A (en) | 1983-02-23 | 1983-02-23 | Manufacture of synthetic resin molded item |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58028934A JPS59155022A (en) | 1983-02-23 | 1983-02-23 | Manufacture of synthetic resin molded item |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59155022A JPS59155022A (en) | 1984-09-04 |
| JPH0331123B2 true JPH0331123B2 (en) | 1991-05-02 |
Family
ID=12262224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58028934A Granted JPS59155022A (en) | 1983-02-23 | 1983-02-23 | Manufacture of synthetic resin molded item |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59155022A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4626391A (en) * | 1984-12-24 | 1986-12-02 | General Motors Corporation | Method of finishing a body panel joint |
| JPH0826779B2 (en) * | 1988-03-29 | 1996-03-21 | 大協株式会社 | Sound insulation cover member manufacturing method |
| EP1153799A1 (en) * | 1999-11-05 | 2001-11-14 | Tokai Kogyo Co. Ltd. | Molding and method and device for manufacturing the molding |
| JP2003291171A (en) * | 2002-04-04 | 2003-10-14 | Idemitsu Petrochem Co Ltd | Integral molding method of thermoplastic material and automobile door panel formed by this method |
| JP5422307B2 (en) * | 2009-08-31 | 2014-02-19 | ダイキョーニシカワ株式会社 | Two-color injection molding method for resin windows |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56144131A (en) * | 1980-04-10 | 1981-11-10 | Hashimoto Forming Co Ltd | Manufacture of heavy-gage molding of synthetic resin |
-
1983
- 1983-02-23 JP JP58028934A patent/JPS59155022A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59155022A (en) | 1984-09-04 |
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