JPS60122125A - Multicolor forming method of synthetic resin - Google Patents
Multicolor forming method of synthetic resinInfo
- Publication number
- JPS60122125A JPS60122125A JP22906483A JP22906483A JPS60122125A JP S60122125 A JPS60122125 A JP S60122125A JP 22906483 A JP22906483 A JP 22906483A JP 22906483 A JP22906483 A JP 22906483A JP S60122125 A JPS60122125 A JP S60122125A
- Authority
- JP
- Japan
- Prior art keywords
- injection
- seal piece
- mold
- molding
- molded body
- 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.)
- Pending
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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
(技術分野)
この発明は、複数回の射出成形によって色分けされたー
の樹脂成形体を製造する合成樹脂の多色成形方法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a multicolor molding method for synthetic resin, which produces color-coded resin moldings by multiple injection moldings.
(従来技術) たとえば、自動車のバンパ、エプロンなどの大。(Conventional technology) For example, large car bumpers, aprons, etc.
型部品を多色成形する従来方法としては、第1図に例示
するものがある。A conventional method for molding mold parts in multiple colors is exemplified in FIG.
この方法は、上下方向に往復連動されるーの共通可動型
1と、この可動型1の上方に配■rtされて水平方向に
駆動される二連の固定型2,3とを用いることにより実
施され、この方法によれば、まず、共通可動型1と一方
の固定型2とで形成される金型キャビティ内へ、第1図
(a)に示すように、射出シリンダ今によって、特定の
色彩を施己た成形体構成部分5を射出成形し、次いで、
第1図の)に示すように、可動型1を下降させてそこに
成形体構成部分5を載せたまま型開きを行うとともに、
固定型2,8を水平移動させて他方の固定型aを可動型
1の直上位置にもたらし、また、その可動型1を上昇さ
せてそれと固定型3との間に金型キャビティを形成し、
さらに、第1図(C)に示すように、他の射出シリンダ
6によって、その金型キャビティ内へ前述の成形体構成
+t+S分5とは異なった色彩を施した成形体構成部分
7を射出成形してそのも・l成部分7を構成部分5に融
合固化させることにより、色分けされたーの樹脂成形体
が製造される。This method is carried out by using a common movable mold 1 that is reciprocated in the vertical direction, and two fixed molds 2 and 3 that are arranged above the movable mold 1 and driven in the horizontal direction. According to this method, first, a specific color is injected into a mold cavity formed by a common movable mold 1 and one fixed mold 2 by using an injection cylinder as shown in FIG. The molded body component part 5 subjected to the above steps is injection molded, and then,
As shown in ) in FIG. 1, the movable mold 1 is lowered and the mold is opened with the molded body component 5 placed thereon, and the mold is opened.
The fixed molds 2 and 8 are moved horizontally to bring the other fixed mold a to a position directly above the movable mold 1, and the movable mold 1 is raised to form a mold cavity between it and the fixed mold 3,
Furthermore, as shown in FIG. 1(C), another injection cylinder 6 is used to inject into the mold cavity a molded body component 7 having a color different from that of the molded body configuration +t+S 5 described above. Then, by fusing and solidifying the component part 7 with the component part 5, color-coded resin molded bodies are manufactured.
ところが、このような従来技術にあっては、固定型2を
用いた成形体構成部分5の成形後に、別の固定型8を用
いた成形体11I成部分7の射出成形を行って画構成部
分5,7を直接的に接合させており、両面定型の加工寸
法により1り動型との型当たりにバラツキが発生するた
め別の固定型と切めの成形体構成部との間にわずかなす
き間が生じた場合射出圧力により次の樹脂が差し込んで
しまい画構成部分5,7間に、修正が不用Of<である
見切り不良がしばしは発生し、画構成部分5,7いいか
えればそれらの色彩を、直線状その他のjift要形状
に明確に区分することができないというJlj大なる問
題があった。特に初めの成ノ1′?体構成1η1(分の
体積又は型当たり面積が大きな場合には、別の固シj1
型と初めの成形体構成部分との自わu t+1度を良く
することは、非常に困難な作業となり、多くの工数を要
するという問題点があった。しかも、画構成部分5,7
は一般に、いずれも比較的大きい体積を有することから
、それらのいずれを先に成形する場合であっても、先の
成形工程における射出および冷却時間が相当長くなって
生産性が悪くなるという問題があった。However, in such a conventional technique, after the molded body component part 5 is molded using the fixed mold 2, the molded body 11I component part 7 is injection molded using another fixed mold 8 to form the image component part. 5 and 7 are directly joined, and due to the machining dimensions of the double-sided fixed mold, there will be variations in the mold contact with the single moving mold, so there will be a slight difference between the other fixed mold and the cut molded body component. If a gap occurs, the next resin will be inserted due to the injection pressure, resulting in poor cutting between the image component parts 5 and 7, which requires no correction.In other words, the color of the image component parts 5 and 7 will change Jlj had a major problem in that it was not possible to clearly divide it into straight lines and other shapes that required a lift. Especially the first one? body structure 1η1 (if the volume or area per mold is large, another solid size j1
There was a problem in that improving the self-t+1 degree between the mold and the initial molded body component was a very difficult task and required a large number of man-hours. Moreover, the image composition parts 5 and 7
Generally, both have a relatively large volume, so even if any of them is molded first, there is a problem that the injection and cooling times in the first molding process will be considerably long, resulting in poor productivity. there were.
(発明の目的)
この発明は、従来技術のこのような問題点に着目してな
されたものであり、成形体構成部分間の見切りが確実で
あるとともに、サイクルタイムを短縮して生産性を高め
ることができる合成樹脂の多色成形方法を提供するもの
である。(Objective of the Invention) The present invention has been made by focusing on the above-mentioned problems of the prior art, and aims to ensure the separation between the constituent parts of the molded body, shorten the cycle time, and increase productivity. The present invention provides a multicolor molding method for synthetic resins that can be used.
(発明の構成)
この発明の合成樹脂の多色成形方法は、とくに1少なく
とも−のシール片を射出成形した後、シール片の両側へ
成形体構成部分をそれぞれ同時に、もしくは別個に射出
成形してそれらをシール片と一体化することよりなる。(Structure of the Invention) The multi-color molding method for synthetic resin of the present invention is particularly characterized in that after at least one seal piece is injection molded, constituent parts of the molded body are injection molded on both sides of the seal piece, either simultaneously or separately. It consists of integrating them with a sealing piece.
この合成樹脂の多色成形方法によれば、成形体構成部分
の成形に際して金型キャビティ内に丁度含まれる比較的
小体積のシール片によって各成形体構成部分が確実に区
分されるので、複数の成形体構成部分の所期した通りの
見切りかもたらされる。また、比較的小体積のシール片
を先に射出成形することにより、後工程にて複数の成形
体構成部分を同時に成形することができZ)ので、とく
に先の成形工程の射出および冷却時間の短縮によってサ
イクルタイムを短かくでき、生産性を高めることができ
る。According to this multicolor molding method for synthetic resin, each molded body component is reliably separated by a relatively small-volume seal piece just contained in the mold cavity when molding the molded body component, so that multiple molded body components are reliably separated. The desired separation of the molded body components is achieved. In addition, by first injection molding a relatively small-volume seal piece, multiple molded body components can be molded simultaneously in the subsequent process. By shortening it, cycle time can be shortened and productivity can be increased.
(実施例) 以下にこの発明を図示例をもとに説明する。(Example) The present invention will be explained below based on illustrated examples.
第2図はこの発明の一実施例を示す断面図である。FIG. 2 is a sectional view showing an embodiment of the present invention.
図中11は共通可動型を、12.18はそれぞれ水平方
向に一体的に連結した固定型を示し1この例、でも共通
可動型11は上下方向に、また固定型12.1.13は
水平方向にそれぞれ往復駆動される。In the figure, 11 indicates a common movable type, and 12.18 indicates a fixed type that is integrally connected in the horizontal direction.1 In this example, the common movable type 11 is vertically connected, and the fixed type 12.1.13 is horizontal. It is driven reciprocatingly in each direction.
そしてここにおける固定型12は、比較的小体積のシー
ル片のための金型窪みを−(i しており、固定型18
は樹脂成形体の形状とス、1応する輪郭の金型窪みを有
している。The fixed mold 12 here has a mold recess of −(i) for a relatively small-volume seal piece, and the fixed mold 18
The mold has a depression whose contour corresponds to the shape of the resin molded body.
また図中14は可動型11のA−バハング部11aに掛
合する固定型12.18の分割型を・示し、これらの分
割型14は、エジェクタープレートから延在するロッド
14aの先端に取り付けられている。分割型14は、ロ
ッド14aの作動によって斜め方向へ移動し、ロッド1
4aの後退によって可動型11と固定型および分割型1
4を固定し、また、エジェクトに際するロッド14aの
進出によって両型の離脱および成形品の離型をもたらす
。Further, in the figure, 14 indicates a split mold of the fixed mold 12 and 18 that engages with the A-bar hang portion 11a of the movable mold 11, and these divided molds 14 are attached to the tip of a rod 14a extending from the ejector plate. There is. The split mold 14 is moved diagonally by the operation of the rod 14a, and the rod 1
By retreating 4a, the movable mold 11, fixed mold and split mold 1 are separated.
4 is fixed, and the advancing of the rod 14a upon ejection causes separation of both molds and release of the molded product.
このような成形型を用いたこの発明の実施では〜はじめ
に、第2図(a)に示すように、可動型11に対する固
定型12の型締めを行い、両型の金型キャビティ内へ射
出シリンダー4によって射出成形を行う。この射出成形
により、所要の色彩を施したもしくは施さない樹脂が、
第8図(a)に示すように、固定型12のホットランナ
12aを経て金型キャビティ内へ注入され、そこで凝固
されるので、可動型11上に、必要にして十分な寸法を
有するこの例では二本のシール片15が形成される。In carrying out the present invention using such a mold, first, as shown in FIG. 2(a), the fixed mold 12 is clamped to the movable mold 11, and the injection cylinder is inserted into the mold cavities of both molds. Injection molding is performed according to step 4. Through this injection molding, the resin is made with or without the desired color.
As shown in FIG. 8(a), this example is injected into the mold cavity through the hot runner 12a of the fixed mold 12 and solidified there, so that it is placed on the movable mold 11 with necessary and sufficient dimensions. Then, two seal pieces 15 are formed.
なおここで、好ましくは図示例のように、シール片15
に可動型内へ若干入り込むリプ15aを設け、このリプ
15aによって型開きに際するシ−ル片15の可動型1
1からの離脱全有効に防止する。Here, preferably, as in the illustrated example, the seal piece 15
A lip 15a that slightly enters the movable mold is provided at the movable mold 1, and this lip 15a allows the sealing piece 15 to move into the movable mold 1 when the mold is opened.
Effectively prevents departure from 1.
次いで、第2図(b)に示すように、可動型11の下降
運動に基づいて型開きを行うとともに、固定型12.1
8を水平移動させ〜そして樹脂成形体の形状と対応する
輪郭を有し1シ一ル片15を丁度内包する金型窪みを有
する固定型18を、可動型11に型締めする。Next, as shown in FIG. 2(b), the mold is opened based on the downward movement of the movable mold 11, and the fixed mold 12.1
8 is moved horizontally, and a fixed mold 18 having a mold recess having a contour corresponding to the shape of the resin molded body and exactly enclosing one seal piece 15 is clamped to the movable mold 11.
その後、第2図(0)に示すように、相互に異なった色
彩の樹脂を射出する射出シリンダ・−4,6を、固定型
18のそれぞれのスプルプツシユニ当接させ、それらか
ら、たとえば同時に、金型キャビティへの射出成形を行
う。この成形に際し、両型11,18は、第3図(b)
に示すように、シール片15をその厚さ方向に挟んで対
向するので1射出シリンダー4からの樹脂を両シール片
間へ、また射出シリンダー6からの樹脂を各シール片1
6の外側へそれぞれ注入し、凝固させることにより、シ
ール片1111と一体をなす成形体構成部分1(1゜1
7がそれぞれもたらされ、全体として色分けされたーの
樹脂成形体が製造される。Thereafter, as shown in FIG. 2(0), the injection cylinders 4 and 6, which inject resins of different colors, are brought into contact with the respective spur units of the fixed mold 18, and from them, for example, gold is simultaneously produced. Perform injection molding into the mold cavity. During this molding, both molds 11 and 18 are
As shown in the figure, since the seal pieces 15 are opposed to each other in the thickness direction, the resin from one injection cylinder 4 is transferred between the two seal pieces, and the resin from the injection cylinder 6 is transferred between each seal piece 1.
6 to the outside and solidified, the molded body component part 1 (1°1
7 are brought respectively, and color-coded resin molded bodies are produced as a whole.
なおこの例によれば、シール片15および成形体構成部
分16を同一の射出シリンダー4から射出成形している
ので、二色に色分けされた樹脂成形体がもたらされるが
、シール片15およびそれぞれの成形体構成部分1(1
,17の色彩を所要に応じて適宜に選択できることはも
ちろんである。In addition, according to this example, since the seal piece 15 and the molded body component part 16 are injection molded from the same injection cylinder 4, a resin molded body that is divided into two colors is produced. Molded body component part 1 (1
, 17 colors can of course be selected as required.
このような多色成形方法によれば、型との当たり面積が
小さなシール片15を型11,111で厚さ方向に挟持
することにより、シール片15 (7)両側部へ注入さ
れる樹脂はそれによって確実に見切られ、シール片15
を越えた樹脂の流動は生じないので、見切り不良による
不合格關品が発生するおそれが極めて少ない。According to such a multicolor molding method, by sandwiching the seal piece 15 having a small contact area with the mold in the thickness direction between the molds 11 and 111, the resin injected into both sides of the seal piece 15 (7) is This ensures that the seal piece 15
Since the resin does not flow beyond this point, there is extremely little risk of rejecting the product due to poor cutting.
なお両面定型12,113の相対11度に関しては鴫固
定型12にはシール片15のための小寸法の金型窪みだ
けが形成されるので、両面定型12.18の精度をその
シール片成形部分においてとくに揃えるだけで、見切り
不良の発生を十分有効に防止することができる。Regarding the relative angle of 11 degrees between the double-sided molds 12 and 113, only a small-sized mold recess for the seal piece 15 is formed in the fixed mold 12, so the accuracy of the double-sided mold 12 and 18 is based on the seal piece molding part. In particular, simply by aligning the edges, it is possible to sufficiently effectively prevent the occurrence of poor termination.
またこの多色成形方法では、第1吊目の射出JJ(形に
よって比較的小体積のシール片15が、また次の射出成
形によって複数の+ilz形体構成部分10゜17が同
時に形成されるので1各成形体構成部分を順次に射出成
形していた従来技術に比し、第1番目の射出成形に要す
る時間を著しく短縮してサイクルタイムを短かくするこ
とができる。In addition, in this multicolor molding method, the seal piece 15 of relatively small volume is formed by the first injection JJ (depending on the shape), and a plurality of +ilz shaped body constituent parts 10° 17 are simultaneously formed by the next injection molding. Compared to the prior art in which each component part of the molded body is sequentially injection molded, the time required for the first injection molding can be significantly shortened and the cycle time can be shortened.
ちなみに、このことを1500 )ン規松の射出成形機
によって約2〜3 kgの樹脂成形体を製造する場合に
ついてみると、従来技術で4.1約88秒であった第1
番目の射出成形時間(射出開始から冷却終了まで)をこ
の発明では約12秒とすることができ、これは成形サイ
クル全体において約15%の時間短縮になる。なお、第
2爵11の4−1出成形時間は、両者ともにほぼ同一で
ある。By the way, if we look at this in the case of manufacturing a resin molded article of about 2 to 3 kg using a 1500-inch injection molding machine, the time required for the first injection molding is 4.1 seconds, which was about 88 seconds with the conventional technology.
In this invention, the injection molding time (from the start of injection to the end of cooling) can be reduced to about 12 seconds, which is a time reduction of about 15% in the entire molding cycle. Incidentally, the 4-1 molding time of No. 2 No. 11 is almost the same for both.
さらにここでは、シール片1fiの体積が小さく、熱容
量もまた小さいことがら、その両側へ注入される加熱樹
脂によって十分に溶融され、この結果として、シール片
15と成形体構成部分10,17との十分な強度による
接合がもたらされる。加えて、小体積のシール片16は
、その両側への加熱樹脂の注入によって内部温度を相当
上昇されるので、成形体構成部分の射出成形に際し、そ
れが樹脂成形体に大きな熱変形をもたらすおそれがない
。Furthermore, here, since the volume of the seal piece 1fi is small and its heat capacity is also small, it is sufficiently melted by the heated resin injected to both sides thereof, and as a result, the seal piece 15 and the molded body constituent parts 10, 17 are melted sufficiently. A bond with sufficient strength is provided. In addition, since the internal temperature of the small-volume seal piece 16 is considerably increased by injecting heated resin into both sides thereof, there is a risk that this will cause large thermal deformation to the resin molded body during injection molding of the molded body component. There is no.
第4図は、シール片形状の変更例を示す断面図であり、
シール片の体積が小さいことに起因する金型キャビティ
内での樹脂の十分なる流動をもたらし得ないおそれを除
去するため、シール片15の側部にランナ15bを一体
的に形成したものである。この例によれば、ゲートの数
を少なくして所要形状のシール片15に対し、樹脂の十
分なる流動をもたらし得る他、少なくとも一方の成形体
構成部分との接合面積を増7Jlしさせて接合強度のよ
り一層の向上をもたらすことができる。FIG. 4 is a sectional view showing an example of changing the shape of the seal piece,
A runner 15b is integrally formed on the side of the seal piece 15 in order to eliminate the possibility that the resin may not flow sufficiently within the mold cavity due to the small volume of the seal piece. According to this example, in addition to reducing the number of gates and providing sufficient flow of the resin to the seal piece 15 having a desired shape, the joint area with at least one molded body component is increased by 7Jl. Further improvement in strength can be brought about.
以上この発明を、図示例をもとに説明したが、固定およ
び可動型を横向きに配置すること、複数の成形体構成部
分の射出成形を順次に行うこと、図示例では二個とした
成形体構成部分を三個以上とすること、さらにはシール
片の数を所要に応じて増減することもできる。The present invention has been explained above based on the illustrated example, but the fixed and movable molds are arranged horizontally, the injection molding of a plurality of molded body components is performed sequentially, and the molded body is formed into two molded bodies in the illustrated example. The number of constituent parts can be three or more, and the number of seal pieces can also be increased or decreased as required.
(発明の効果)
従って、この発明によれば、少なくとツコーのシール片
を射出成形した後、シール片の両側へ成形体構成部分を
それぞれ同時に、もしくG、1別個にn4出成形し−て
それらをシール片と−イ本化することにより、簡単な型
構成で各成形(+Gl h’tr部分の色彩を確実に見
切ることができ、また、成JIJのザイクルタイムを短
縮して生産性を高めることができるという顕著なる効果
がもたらされる。(Effects of the Invention) Therefore, according to the present invention, after injection molding at least one seal piece, the molded body constituent parts are injection molded on both sides of the seal piece simultaneously or separately. By converting them into seal pieces and parts, it is possible to reliably see the color of each molding (+Gl h'tr part) with a simple mold configuration, and it also shortens the cycle time of JIJ and increases productivity. This has the remarkable effect of increasing the
第1図は従来例を示す成形工程図、
第2図はこの発明の実施例を示す成形工程図1第3図は
シール片および成形体t1+9戒部分の成形状態を示す
拡大断面図、
第4図はシール片形状の変更例を示す拡大断面・図であ
る。
11・・・可動型 12.13・・・固定型14・・・
分割型 15・・・シール片15a・・・リプ 15h
・・・ランナ16 、17・・・成形体構成部分
第1図
第2[1
第3図
(a)
1
−とだ〕4NFIG. 1 is a molding process diagram showing a conventional example; FIG. 2 is a molding process diagram showing an embodiment of the present invention; FIG. The figure is an enlarged cross-sectional view showing an example of a change in the shape of the seal piece. 11...Movable type 12.13...Fixed type 14...
Split type 15... Seal piece 15a... Lip 15h
...Runners 16, 17... Molded body constituent parts Fig. 1 Fig. 2 [1 Fig. 3 (a) 1 -] 4N
Claims (1)
形体を製造するに際し、 少なくとも−のシール片(15)を射出成形する工程と
1シ一ル片(15)の両側へ成形体構成部分(16,1
7)をそれぞれ射出成形してそれらをシール片(15)
と一体化する工程とを組み合せてなる合成樹脂の多色成
形方法。[Scope of Claims] L: When producing a color-coded resin molded body by multiple injection moldings, the step of injection molding at least a seal piece (15) and both sides of one seal piece (15). to the molded body component (16,1
7) respectively by injection molding and sealing pieces (15).
A multi-color molding method for synthetic resin that combines the process of integrating the
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22906483A JPS60122125A (en) | 1983-12-06 | 1983-12-06 | Multicolor forming method of synthetic resin |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22906483A JPS60122125A (en) | 1983-12-06 | 1983-12-06 | Multicolor forming method of synthetic resin |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60122125A true JPS60122125A (en) | 1985-06-29 |
Family
ID=16886168
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22906483A Pending JPS60122125A (en) | 1983-12-06 | 1983-12-06 | Multicolor forming method of synthetic resin |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60122125A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1568460A1 (en) * | 2004-02-24 | 2005-08-31 | Mold-Masters Limited | Multiple-material injection molding |
CN103223703A (en) * | 2013-04-24 | 2013-07-31 | 深圳市利勇安硅橡胶制品有限公司 | Forming die of double color silica gel product, forming method and silica gel product thereof |
-
1983
- 1983-12-06 JP JP22906483A patent/JPS60122125A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1568460A1 (en) * | 2004-02-24 | 2005-08-31 | Mold-Masters Limited | Multiple-material injection molding |
CN103223703A (en) * | 2013-04-24 | 2013-07-31 | 深圳市利勇安硅橡胶制品有限公司 | Forming die of double color silica gel product, forming method and silica gel product thereof |
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