JPH0462525B2 - - Google Patents
Info
- Publication number
- JPH0462525B2 JPH0462525B2 JP17728086A JP17728086A JPH0462525B2 JP H0462525 B2 JPH0462525 B2 JP H0462525B2 JP 17728086 A JP17728086 A JP 17728086A JP 17728086 A JP17728086 A JP 17728086A JP H0462525 B2 JPH0462525 B2 JP H0462525B2
- Authority
- JP
- Japan
- Prior art keywords
- cleaning
- mold
- rubber
- product cavity
- cleaning rubber
- 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
- 238000004140 cleaning Methods 0.000 claims description 44
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 15
- 238000004073 vulcanization Methods 0.000 claims description 5
- 238000001746 injection moulding Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 3
- 238000011109 contamination Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- -1 aliphatic amino alcohol Chemical class 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- 239000000126 substance 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
- B29C45/1753—Cleaning or purging, e.g. of the injection unit
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding 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、洗浄用ゴムをゴム用射出成形金型の
製品キヤビテイに充填し、加硫完了後、離型する
ことにより金型製品キヤビテイ面の洗浄を行なう
方法に関する。Detailed Description of the Invention <Industrial Field of Application> The present invention is characterized by filling the product cavity of a rubber injection mold with cleaning rubber, and releasing the product after vulcanization is completed to clean the product cavity surface of the mold. The present invention relates to a method for cleaning.
＜従来の技術＞
ゴム用射出成形金型は、成形サイクルを重ねる
と、主としてその製品キヤビテイ面に、ゴム中に
含まれるプロセスオイル、カーボンブラツク等の
配合薬品の付着に主として起因する汚染（スケー
ル）が発生する。<Conventional technology> When rubber injection molds undergo repeated molding cycles, contamination (scale) mainly occurs on the product cavity surface due to adhesion of compounded chemicals such as process oil and carbon black contained in the rubber. occurs.
この汚染は、成形品の離型困難、さらには、成
形品自体の汚れ、肌荒れ等を発生させるため、定
期的に製品キヤビテイ面を清浄化する、いわゆる
金型洗浄を行なう必要がある。 This contamination makes it difficult to release the molded product, and furthermore causes stains and rough skin on the molded product itself, so it is necessary to periodically clean the product cavity surface, which is called mold cleaning.
そして、この洗浄方法としては、第４図に示す
如く、成形用の主射出ノズルユニツト１に加え
て、別に装備された洗浄用ゴム射出専用の副射出
ノズルユニツト２を用いて、洗浄用ゴムをスプル
ー４、ランナー５、ゲート６を介して製品キヤビ
テイ８内に充填して行なうか、又は、第５図に示
す如く、型開き状態の下型１１の製品キヤビテイ
形成凸部１１ａ上に洗浄用ゴムＣの塊を装填し
て、型閉じを行ない、下型１１と、中型１２が組
み込まれた上型１３とで挾み込んで製品キヤビテ
イ８に充填して行なつていた（例えば特開昭58−
180600号公報参照）。なお、図例中、１４はラン
ナー盤である。 In this cleaning method, as shown in Fig. 4, in addition to the main injection nozzle unit 1 for molding, a separately equipped sub-injection nozzle unit 2 dedicated to injection of cleaning rubber is used to inject cleaning rubber. This can be done by filling the product cavity 8 through the sprue 4, runner 5, and gate 6, or, as shown in FIG. The mass of C was loaded, the mold was closed, and the product cavity 8 was filled by sandwiching the mass between the lower mold 11 and the upper mold 13 in which the middle mold 12 was incorporated (for example, in JP-A No. 58 −
(See Publication No. 180600). In addition, in the illustrated example, 14 is a runner board.
＜発明が解決しようとする問題点＞
しかし、上記前者の場合、特別な副射出ノズル
ユニツト２を装備する必要があり、成形装置全体
として機構が複雑となり望ましくない。後者の場
合圧縮成形方法となるため、材料流動圧が高くな
り、しかも洗浄用ゴムは粘度が低く（ムーニー粘
度ML1+4100℃20〜60）、材料が通常回り込まない
割り面等へ深く侵入し、充填洗浄用ゴム離型後
に、割り面等にフイルム状の洗浄用ゴムが残り、
その除去作業が必要であつた。<Problems to be Solved by the Invention> However, in the former case, it is necessary to equip a special sub-injection nozzle unit 2, which is undesirable because the mechanism of the entire molding apparatus becomes complicated. In the latter case, compression molding is used, so the material flow pressure is high, and the cleaning rubber has a low viscosity (Mooney viscosity ML 1+4 100℃ 20 to 60), making it possible for the material to penetrate deeply into cracked surfaces, etc. where it would normally not go around. However, after filling and releasing the cleaning rubber from the mold, a film of cleaning rubber remains on the split surface, etc.
It was necessary to remove it.
＜問題点を解決するための手段＞
本発明者は、上記問題点を解決するために、鋭
意開発に努力をした結果、下記ゴム用射出成形金
型の洗浄方法に想到した。<Means for Solving the Problems> In order to solve the above-mentioned problems, the inventors of the present invention made extensive efforts in development and came up with the following method for cleaning rubber injection molding molds.
洗浄用ゴムを射出成形用金型の製品キヤビテイ
に充填し、加硫完了後、充填洗浄用ゴムを離型す
ることにより製品キヤビテイ面の洗浄を行なう方
法において、製品キヤビテイへの洗浄用ゴムの充
填を、前記製品キヤビテイ割り面の上方に位置す
る別の副割り面部位に形成されたプランジヤ・ポ
ツト対によりゲートを介して行なうことを特徴と
する。 Filling the product cavity with cleaning rubber in a method of cleaning the product cavity surface by filling cleaning rubber into the product cavity of an injection mold and releasing the filled cleaning rubber after vulcanization is completed. The method is characterized in that the step is carried out via a gate by a pair of plungers and pots formed in another sub-section surface located above the product cavity section.
＜実施例＞
以下、本発明のゴム用射出成形金型の洗浄方法
を図例に基づいて説明をする。従来例と同一部分
については、同一図符号を付すとともに、説明の
一部を省略することもある。<Example> Hereinafter, the method for cleaning a rubber injection mold of the present invention will be explained based on illustrated examples. The same parts as in the conventional example are given the same reference numerals, and some explanations may be omitted.
第１〜２図は本発明の方法に使用する金型の一
例を示し、製品キヤビテイ割り面（第１・第２）
２１，２２の上方に位置する副割り面２３に、プ
ランジヤ２５・ポツト２６対が形成されている。
ここで副割り面２３は、ランナー盤１４と上型１
３とで形成されている。ここで、ポツト２６の容
量は、製品キヤビテイ８全容量の1.5〜2.5倍とす
る。 Figures 1 and 2 show an example of a mold used in the method of the present invention.
A plunger 25 and a pot 26 pair are formed on the sub-divided surface 23 located above 21 and 22.
Here, the sub-dividing surface 23 is connected to the runner plate 14 and the upper die 1.
It is formed by 3. Here, the capacity of the pot 26 is 1.5 to 2.5 times the total capacity of the product cavity 8.
上記金型を用いて金型洗浄は、まず、洗浄用ゴ
ムＣをポツト部２６へ装填する（第１図参照）。
次に、逆流防止の見地からスプルー４上端開口を
盲とした状態で、上型１３を中型１２、下型１１
とともに上昇させると、ポツト２６内の洗浄用ゴ
ムＣはプランジヤ２６の作用で、ゲート６を介し
て製品キヤビテイ８内に充填される（第２図参
照）。そして、加硫完了後、充填洗浄用ゴムC′を
離型すれば、金型洗浄が完了する。 To clean the mold using the above-mentioned mold, first, cleaning rubber C is loaded into the pot portion 26 (see FIG. 1).
Next, from the viewpoint of preventing backflow, the upper mold 13 is inserted into the middle mold 12 and the lower mold 11 with the upper end opening of the sprue 4 blinded.
When the pot 26 is raised at the same time, the cleaning rubber C in the pot 26 is filled into the product cavity 8 through the gate 6 by the action of the plunger 26 (see FIG. 2). After the vulcanization is completed, the filling and cleaning rubber C' is released from the mold to complete the mold cleaning.
上記において、製品キヤビテイ８内の充填は、
射出の場合と同様の注入成形方式なので、圧縮成
形方式のように製品キヤビテイ割り面２２，２１
の奥深く洗浄用ゴムが侵入するおそれがない。ま
た、上記に使用する洗浄用ゴムとしては、例え
ば、前記公開公報に記載されているような脂肪族
アミノアルコールを含有する配合生ゴム等を用い
る。 In the above, the filling inside the product cavity 8 is as follows:
Since it is an injection molding method similar to the injection molding method, the product cavity dividing surfaces 22 and 21 are
There is no risk of the cleaning rubber penetrating deep inside. Further, as the cleaning rubber used above, for example, compound raw rubber containing an aliphatic amino alcohol as described in the above-mentioned publication is used.
第３図は、本発明の方法に使用する金型の別の
一例を示し、ランナー有しない、スプルーゲート
７を用いて成形する方式の射出成形金型であつ
て、上型を１３ａ，１３ｂと上下に二分割して副
割り面２４を形成し、該副割り面２４部位に、プ
ランジヤ２５・ポツト２６対を形成したものであ
る。この金型を用いての金型洗浄は、上記第１〜
２図の金型の場合と同様である。 FIG. 3 shows another example of the mold used in the method of the present invention, which is an injection mold that does not have a runner and is molded using a sprue gate 7, in which the upper mold is formed of 13a and 13b. It is divided vertically into two to form a sub-divided surface 24, and a pair of plungers 25 and pots 26 are formed on the sub-divided surface 24. Mold cleaning using this mold is performed in steps 1 to 1 above.
This is the same as the case of the mold shown in Figure 2.
なお、金型が多数個取り、一個取り（ランナー
レス）の場合について説明をしたが、成形品が大
型で、多点ゲート方式の金型についても、本発明
は勿論適用できる。 Although the description has been made regarding the case where the mold has multiple molds or one mold (runnerless), the present invention can of course be applied to a mold with a large molded product and a multi-point gate system.
＜発明の作用・効果＞
本発明のゴム用射出成形金型の洗浄方法は、洗
浄用ゴムを射出成形金型の製品キヤビテイに充填
し、加硫完了後、充填洗浄用ゴムを離型すること
により製品キヤビテイ面の洗浄を行なう方法にお
いて、製品キヤビテイへの洗浄用ゴムの充填を、
製品キヤビテイ割り面の上方に位置する別の副割
り面部位に形成されたプランジヤ・ポツト対によ
りゲートを介して行なうため、洗浄用ゴム充填
のための特別な副射出ノズルユニツトが不要であ
るとともに、洗浄用ゴム充填が射出と同様の注
入成形方式であり、洗浄用ゴムが製品キヤビテイ
割り面の奥深く侵入するおそれがなく、充填洗浄
用ゴム離型後に、割り面等に残るフイルム状の洗
浄用ゴムの除去作業が必要でなくなる。<Operations and Effects of the Invention> The cleaning method for a rubber injection mold of the present invention includes filling a cleaning rubber into a product cavity of an injection mold and releasing the filled cleaning rubber from the mold after completion of vulcanization. In the method of cleaning the product cavity surface, filling the product cavity with cleaning rubber,
Since the injection is carried out through a gate using a plunger/pot pair formed on another sub-section surface located above the product cavity section, there is no need for a special sub-injection nozzle unit for filling the cleaning rubber. Cleaning rubber is filled using an injection molding method similar to injection molding, so there is no risk of the cleaning rubber penetrating deep into the split surface of the product cavity, and the cleaning rubber remains in the form of a film on the split surface after the filling and cleaning rubber is released from the mold. removal work is no longer necessary.
第１図は本発明の金型洗浄方法に使用する金型
においてポツトに洗浄用ゴムを装填した状態を示
す概略断面図、第２図は同じく製品キヤビテイに
洗浄用ゴムを充填した状態を示す概略断面図、第
３図は本発明の金型洗浄方法に使用する他の金型
においてポツトに洗浄用ゴムを装填した状態を示
す概略断面図、第４図は従来の金型洗浄方法の一
例を説明するための金型の概略断面図、第５図は
同じく他の例を説明するための金型の概略断面図
である。
６……ゲート、７……スプルーゲート、８……
製品キヤビテイ、１３……上型、１４……ランナ
ー盤、２２……製品キヤビテイ割り面（第２）、
２３，２４……副割り面、２５……プランジヤ、
２６……ポツト。
Fig. 1 is a schematic sectional view showing a mold used in the mold cleaning method of the present invention, with a pot filled with cleaning rubber, and Fig. 2 is a schematic sectional view showing a product cavity filled with cleaning rubber. 3 is a schematic sectional view showing a state in which cleaning rubber is loaded into a pot in another mold used in the mold cleaning method of the present invention, and FIG. 4 is a schematic sectional view showing an example of a conventional mold cleaning method. FIG. 5 is a schematic sectional view of a mold for explaining another example. 6...gate, 7...sprue gate, 8...
Product cavity, 13... upper mold, 14... runner plate, 22... product cavity dividing surface (second),
23, 24...Sub-splitting surface, 25...Plunger,
26...pot.
Claims (1)
に充填し、加硫完了後、充填洗浄用ゴムを離型す
ることにより製品キヤビテイ面の洗浄を行なう方
法において、 前記製品キヤビテイへの洗浄用ゴムの充填を、
製品キヤビテイ割り面の上方に位置する別の副割
り面部位に形成されたプランジヤ・ポツト対によ
りゲートを介して行なうこと、 を特徴とするゴム用射出成形金型の洗浄方法。[Scope of Claims] 1. A method of cleaning the surface of the product cavity by filling a product cavity of an injection mold with cleaning rubber and releasing the filled cleaning rubber after vulcanization, comprising: Filling the cleaning rubber into the
A method for cleaning an injection mold for rubber, characterized in that the cleaning is carried out through a gate using a pair of plungers and pots formed in another sub-dividing surface located above a product cavity dividing surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17728086A JPS6331728A (en) | 1986-07-28 | 1986-07-28 | Cleaning of injection molding mold for rubber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17728086A JPS6331728A (en) | 1986-07-28 | 1986-07-28 | Cleaning of injection molding mold for rubber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6331728A JPS6331728A (en) | 1988-02-10 |
| JPH0462525B2 true JPH0462525B2 (en) | 1992-10-06 |
Family
ID=16028281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17728086A Granted JPS6331728A (en) | 1986-07-28 | 1986-07-28 | Cleaning of injection molding mold for rubber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6331728A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1004423A3 (en) * | 1991-01-29 | 1992-11-17 | Asm Fico Tooling | Multi matrix. |
| EP0704292A4 (en) * | 1994-03-30 | 1996-12-27 | Sankyokasei Kabushiki Kaisha | Resin molding method and resin molding machine |
-
1986
- 1986-07-28 JP JP17728086A patent/JPS6331728A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6331728A (en) | 1988-02-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |