JPH0617043B2 - Resin injection molding method - Google Patents
Resin injection molding methodInfo
- Publication number
- JPH0617043B2 JPH0617043B2 JP10232992A JP10232992A JPH0617043B2 JP H0617043 B2 JPH0617043 B2 JP H0617043B2 JP 10232992 A JP10232992 A JP 10232992A JP 10232992 A JP10232992 A JP 10232992A JP H0617043 B2 JPH0617043 B2 JP H0617043B2
- Authority
- JP
- Japan
- Prior art keywords
- material resin
- resin
- hot runner
- colorant
- mold
- 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 - Fee Related
Links
- 229920005989 resin Polymers 0.000 title claims description 46
- 239000011347 resin Substances 0.000 title claims description 46
- 238000001746 injection moulding Methods 0.000 title claims description 10
- 239000000463 material Substances 0.000 claims description 33
- 239000003086 colorant Substances 0.000 claims description 27
- 238000004898 kneading Methods 0.000 claims description 21
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 238000004040 coloring Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000002699 waste material Substances 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
- B29C45/18—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
- B29C45/1816—Feeding auxiliary material, e.g. colouring material
-
- 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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/30—Flow control means disposed within the sprue channel, e.g. "torpedo" construction
-
- 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
- B29C45/18—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
- B29C45/1816—Feeding auxiliary material, e.g. colouring material
- B29C2045/1841—Feeding auxiliary material, e.g. colouring material into runner channel or runner nozzle
-
- 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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/30—Flow control means disposed within the sprue channel, e.g. "torpedo" construction
- B29C2045/308—Mixing or stirring devices
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は材料樹脂を射出装置か
ら金型に射出した後に着色してキャビティに充填する射
出成形方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding method for injecting a material resin from an injection device into a mold, coloring the resin, and filling the cavity.
【０００２】[0002]
【従来の技術】射出成形における材料樹脂の着色は、材
料樹脂と着色剤とを射出加熱筒内のスクリユによる溶融
混練を利用して行っており、これを金型に射出して有色
の合成樹脂製品を成形している。このため着色が異なる
成形品を成形する場合には、ホッパー内の材料樹脂また
は着色剤を交換したのち、空だしにより射出加熱筒内の
残留樹脂を排出して、新たな材料樹脂に変えている。2. Description of the Related Art Coloring of a material resin in injection molding is carried out by melting and kneading the material resin and a colorant by a screw in an injection heating cylinder, which is injected into a mold to produce a colored synthetic resin. Molding the product. Therefore, when molding molded products with different colors, after replacing the material resin or colorant in the hopper, the residual resin in the injection heating cylinder is discharged by emptying and changed to a new material resin. .
【０００３】[0003]
【発明が解決しようとする課題】この色替えを完全に行
うには、空だし後に更に数ショット〜数十ショットの実
成形が必要となり、作業には数十分の時間と大量の材料
樹脂及びエネルギーが消費される。In order to completely carry out this color change, it is necessary to carry out actual molding for several shots to several tens of shots after emptying, and it takes several tens of minutes and a large amount of material resin for the work. Energy is consumed.
【０００４】また複数個取りの金型では、ホットランナ
ーブロック内に滞留した材料樹脂をも新しい材料樹脂に
替えねばならぬことから、色替えに際する無駄が多く、
不経済で特に多品種少量生産では成形品のコスト高を招
く原因ともなっている。Further, in a mold having a plurality of molds, since the material resin staying in the hot runner block must be replaced with a new material resin, there is much waste in color change.
It is uneconomical and causes high cost of molded products especially in high-mix low-volume production.
【０００５】この発明は上記課題を解決するために考え
られたものであって、その目的は、材料樹脂の着色を金
型側により行うことによって、材料樹脂の色替えが必要
となっても、射出加熱筒内の材料樹脂はそのままでよ
く、ホットランナーの材料樹脂を排出するだけで、着色
の異なった材料樹脂の射出を行うことができる樹脂の着
色射出成形方法を提供することにある。The present invention has been conceived in order to solve the above-mentioned problems, and an object thereof is to color the material resin by the mold side, so that it is necessary to change the color of the material resin. It is an object of the present invention to provide a resin colored injection molding method in which the material resin in the injection heating cylinder may be left as it is, and the material resins of different colors can be injected by simply discharging the material resin of the hot runner.
【０００６】[0006]
【課題を解決するための手段】上記目的によるこの発明
の特徴は、金型に内装したホットランナーブロックのノ
ズル部内に混練部材を設けるとともに、混練部材後部の
ホットランナーに着色剤供給管を配設し、射出によりホ
ットランナーを流動する材料樹脂と上記着色剤供給管か
らの着色剤とを、上記混練部材を通過する間に混練して
キャビティに充填することにある。According to the features of the present invention according to the above object, a kneading member is provided in a nozzle portion of a hot runner block installed in a mold, and a colorant supply pipe is provided in a hot runner behind the kneading member. Then, the material resin that flows in the hot runner by injection and the colorant from the colorant supply pipe are kneaded while filling the cavity while passing through the kneading member.
【０００７】[0007]
【作 用】上記方法では、ホットランナーに射出された
溶融状態の材料樹脂と、その材料樹脂に添加した着色剤
とが、射出圧により混練部材を通過する間に混練され、
材料樹脂は、射出装置内の材料樹脂とは異なった着色樹
脂として、そのままノズル口からキャビティに充填され
る。[Operation] In the above method, the molten material resin injected into the hot runner and the colorant added to the material resin are kneaded while passing through the kneading member by injection pressure,
The material resin is filled as it is into the cavity from the nozzle port as a colored resin different from the material resin in the injection device.
【０００８】[0008]
【実施例】以下、この発明を複数の成形品の射出成形を
例として詳説する。先ずこの発明の方法を実施できる図
示の射出金型について説明する。The present invention will be described below in detail by taking injection molding of a plurality of molded articles as an example. First, the illustrated injection mold capable of carrying out the method of the present invention will be described.
【０００９】１は型締装置（図は省略）により進退して
型開閉する可動盤で、金型取付面に可動型２が取付けら
れ、対向する固定盤３の金型取付面には固定型４が取付
けられている。Reference numeral 1 denotes a movable platen which is moved forward and backward by a mold clamping device (not shown) to open and close the mold. The movable platen 2 is mounted on a mold mounting surface, and the fixed platen 3 is mounted on a stationary platen. 4 is attached.
【００１０】上記可動型２と固定型４の当接面（パーテ
ィング面）には入子型挿填用凹部５，６が設けられ、固
定型４の入子型挿填用凹部６には成形品７の外形を形成
するキャビティ８と、該キャビティ８に通じる樹脂路９
が刻設された一対の固定入子型１０が埋込まれている。
また可動型２の入子型挿填用凹部５には成形品７の内形
を形成するコア１１と成形品突出機構１２を備えた一対
の可動入子型１３が埋設してある。The contact surfaces (parting surfaces) of the movable die 2 and the fixed die 4 are provided with nesting die insertion recesses 5 and 6, respectively. A cavity 8 that forms the outer shape of the molded product 7, and a resin path 9 that communicates with the cavity 8.
A pair of fixed insert molds 10 in which is engraved are embedded.
Further, a pair of movable nesting dies 13 each having a core 11 forming an inner shape of the molded product 7 and a molded product projecting mechanism 12 are embedded in the recessed portion 5 for inserting the mold into the movable mold 2.
【００１１】上記固定型４は、材料樹脂を溶融状態で各
入子型のキャビティ８に分岐供給するホットランナーブ
ロック１５を、ホットランナーブロック周囲に断熱材１
６を設けて内装しており、そのホットランナーブロック
１５の入口に、固定盤外側の射出装置１４がノズルタッ
チにより接続してある。The fixed die 4 has a hot runner block 15 for branching and feeding the material resin in a molten state into the cavity 8 of each insert die, and the heat insulating material 1 around the hot runner block.
6, the interior is provided, and the injection device 14 outside the fixed platen is connected to the entrance of the hot runner block 15 by nozzle touch.
【００１２】このホットランナーブロック１５のノズル
部１７には、スタティックミキサーと称される混練部材
１８が内装してあり、その混練部材１８の後部のホット
ランナー１５ａには、射出装置１４の射出動作に同期し
て、液状の着色剤を供給する着色剤供給装置１９の着色
剤供給管２０が吐出口を混練部材側に向けて配設されて
いる。また着色剤供給装置１９は、入子型の数だけ設け
られており、各着色剤供給装置１９には必要に応じて同
色または異色の着色剤が供給されている。The nozzle section 17 of the hot runner block 15 is internally provided with a kneading member 18 called a static mixer. The colorant supply pipe 20 of the colorant supply device 19 for supplying the liquid colorant is provided in synchronism with the ejection port facing the kneading member side. Further, the colorant supply devices 19 are provided in the same number as the nesting type, and the colorants of the same color or different colors are supplied to each colorant supply device 19 as needed.
【００１３】次にこの発明の樹脂の着色射出成形方法つ
いて説明する。上記射出装置１４からホットランナー１
５ａにナチュラルカラーの材料樹脂を溶融状態で射出充
填する。その射出充填と同時に着色剤を上記に着色剤供
給管２０からホットランナー１５ａの材料樹脂中に送込
む。この着色剤は射出圧により材料樹脂と一緒に混練部
材１８に流入し、その混練部材１８を通過する間に混練
されて、ナチュラルカラーの材料樹脂を着色する。この
際の材料樹脂の着色状態は、混練度合によって異なり、
混練段数が多いほど混練が均一に行われて色むらが生じ
難い。Next, the resin color injection molding method of the present invention will be described. From the injection device 14 to the hot runner 1
5a is filled with a natural color material resin by injection in a molten state. Simultaneously with the injection filling, the colorant is fed from the colorant supply pipe 20 into the material resin of the hot runner 15a. This colorant flows into the kneading member 18 together with the material resin by the injection pressure, and is kneaded while passing through the kneading member 18 to color the natural color material resin. The coloring state of the material resin at this time depends on the kneading degree,
The larger the number of kneading stages, the more uniform the kneading and the less likely color unevenness will occur.
【００１４】混練部材１８を通過した材料樹脂は、直ち
にノズルからキャビティ８に射出充填されて有色の成形
品７となる。この成形品７の色を変更したい場合には、
着色剤供給装置１９内の着色剤を交換したのち、数ショ
ットの成形を行って、ホットランナー１５ａ及びノズル
部内に残留した着色剤及び着色樹脂を排出する。この場
合、ノズル部内に残留している着色樹脂はごくわずかで
あり、滞留量も僅かなことから短時間、少量の樹脂で色
替えが完了する。The material resin that has passed through the kneading member 18 is immediately injected and filled from the nozzle into the cavity 8 to form a colored molded product 7. If you want to change the color of this molded product 7,
After the colorant in the colorant supply device 19 is exchanged, molding is performed for several shots to discharge the colorant and the colored resin remaining in the hot runner 15a and the nozzle portion. In this case, the amount of the colored resin remaining in the nozzle portion is very small, and the amount of stay is small, so that the color change can be completed with a small amount of the resin in a short time.
【００１５】なお、上記実施例では混練材料としてスタ
ティックキミサーを用いているが、混練部材１８は回転
するスクリユ等の動的混練部材でもよい。また複数のキ
ャビティ８による成形品７も同形のものの他、異形のも
のでも良く、金型は入子式のものを用いるのが多様化へ
の対応という点でより好適であるが、これは通常構造の
金型であってもよい。In the above embodiment, a static kisser is used as the kneading material, but the kneading member 18 may be a dynamic kneading member such as a rotating screw. Further, the molded product 7 having a plurality of cavities 8 may be of the same shape or of a different shape, and it is more preferable to use a mold of a nesting type in order to cope with diversification. It may be a structural mold.
【００１６】[0016]
【発明の効果】この発明は上述のように、固定型側に設
けた金型のホットランナーブロックのノズル部内にて、
ホットランナーを流動する材料樹脂と、その材料樹脂に
添加し着色剤とを混練し、材料樹脂を着色してからキャ
ビティに充填するので、材料樹脂の色替えに際して、射
出加熱筒内の材料樹脂の交換及び空だしを行う必要がな
い。As described above, according to the present invention, in the nozzle portion of the hot runner block of the mold provided on the fixed mold side,
The material resin that flows through the hot runner and the colorant that is added to the material resin are kneaded, the material resin is colored, and then the cavity is filled, so when changing the color of the material resin, the material resin in the injection heating cylinder There is no need to replace or empty.
【００１７】またホットランナー内の残留樹脂の量は少
ないことから、この部分の材料樹脂の空だしも短時間で
済み、空だしによる材料樹脂のロスも極めて僅かなので
コストに影響を与えず、着色剤やエネルギー等の浪費も
少ないのでこれまでよりも経済的であるなど、生産量の
少ない成形品を射出成形する上において頗る都合がよい
特長を有する。Further, since the amount of residual resin in the hot runner is small, emptying of the material resin in this portion can be completed in a short time, and the loss of the material resin due to emptying is extremely small, which does not affect the cost and coloring Since it is less wasteful of agents and energy, it is more economical than before, and has the advantage that it is very convenient for injection molding of molded products with low production volume.
【図１】 この発明に係る樹脂の着色射出成形方法を実
施できる射出成形用金型の略示縦断面図である。FIG. 1 is a schematic vertical cross-sectional view of an injection molding die capable of carrying out a resin colored injection molding method according to the present invention.
【符合の説明】 ３ 固定盤 ４ 固定型 ７ 成形品 ８ キャビティ １５ ホットランナーブロック １５ａ ホットランナー １７ ノズル部 １８ 混練部材 １９ 着色剤供給装置 ２０ 着色剤供給管[Explanation of symbols] 3 Fixed plate 4 Fixed type 7 Molded product 8 Cavity 15 Hot runner block 15a Hot runner 17 Nozzle part 18 Kneading member 19 Colorant supply device 20 Colorant supply pipe
Claims (1)
のノズル部内に混練部材を設けるとともに、混練部材後
部のホットランナーに着色剤供給管を配設し、射出によ
りホットランナーを流動する材料樹脂と上記着色剤供給
管からの着色剤とを、上記混練部材を通過する間に混練
してキャビティに充填することを特徴とする樹脂の着色
射出成形方法。1. A kneading member is provided in the nozzle portion of a hot runner block installed in a mold, and a colorant supply pipe is provided in the hot runner at the rear of the kneading member, and the material resin that flows through the hot runner by injection and the above A color injection molding method for a resin, comprising kneading a colorant from a colorant supply pipe while filling the cavity while passing through the kneading member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10232992A JPH0617043B2 (en) | 1992-03-30 | 1992-03-30 | Resin injection molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10232992A JPH0617043B2 (en) | 1992-03-30 | 1992-03-30 | Resin injection molding method |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19423787A Division JPS6438217A (en) | 1987-08-03 | 1987-08-03 | Mold apparatus for injection molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05301254A JPH05301254A (en) | 1993-11-16 |
| JPH0617043B2 true JPH0617043B2 (en) | 1994-03-09 |
Family
ID=14324499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10232992A Expired - Fee Related JPH0617043B2 (en) | 1992-03-30 | 1992-03-30 | Resin injection molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0617043B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3319300B2 (en) * | 1996-08-13 | 2002-08-26 | 豊田合成株式会社 | Materialized resin molded product |
| CA2356245C (en) | 1998-12-30 | 2007-10-02 | Anton Zahoransky Gmbh & Co. | Method and injection molding machine for producing injection-molded articles, especially toothbrush bodies or toothbrushes |
-
1992
- 1992-03-30 JP JP10232992A patent/JPH0617043B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05301254A (en) | 1993-11-16 |
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