JP3840012B2 - Powder release agent / lubricant supply method and apparatus - Google Patents

Powder release agent / lubricant supply method and apparatus Download PDF

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JP3840012B2
JP3840012B2 JP30525999A JP30525999A JP3840012B2 JP 3840012 B2 JP3840012 B2 JP 3840012B2 JP 30525999 A JP30525999 A JP 30525999A JP 30525999 A JP30525999 A JP 30525999A JP 3840012 B2 JP3840012 B2 JP 3840012B2
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release agent
lubricant
powder
powder release
dispersion container
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JP2001123189A (en
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裕二 井上
昭治 多田
直樹 斉藤
三郎 荒木
伸治 森
満浩 黒田
敏行 岩瀬
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Toyota Motor Corp
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Description

【０００１】
【発明の属する技術分野】
本発明は、粉体離型剤・潤滑剤の粉霧状供給方法、および該方法の実施に直接用いる粉体離型剤・潤滑剤の粉霧状供給装置に関する。
【０００２】
【従来の技術】
ダイカスト鋳造で、従来は、図３に示すように、粉体離型剤・潤滑剤吐出装置１よりピンチゴム１４を通して主管に落下した粉体離型剤・潤滑剤２を高圧エアー４で吐出ホース３を介してダイカストマシン５の金型６内の金型製品部９に圧送し、金型製品部９の内面（製品外周面に相当、以下同じ）に塗布していた。
図４に示すように、粉体離型剤・潤滑剤２は塊状になって（集合した状態で）主管に落下するので、高圧エアー４で圧送される時も、図５に示すように、吐出ホース３内を塊状になって（集合した状態で）圧送される。したがって、粉体離型剤・潤滑剤２がプランジャースリーブ１１を通って（または、プランジャースリーブ１１を通らずに、直接）、金型製品部９、湯道１０に流入した時も分散度が悪く、図６に示すように、粉体離型剤・潤滑剤２の局部堆積や付着ムラが発生する。
また、特開平８−９０１９４号は、図７に示すように、離型剤・潤滑剤圧送経路の主管から分岐管への分岐部１２に渦流発生用パイプ１３を設けてエアーを供給し、粉体離型剤・潤滑剤を渦流により均等量づつ分岐管に分配する装置を提案している。
【０００３】
【発明が解決しようとする課題】
しかし、従来の金型への離型剤・潤滑剤供給装置にはつぎの問題があった。
(i) 図３〜図６の装置では、上記のように、粉体離型剤・潤滑剤が塊状になって（集合した状態で）流れるので、粉体離型剤・潤滑剤の局部堆積や付着ムラが発生する。
(ii)図７の装置では、分岐部の径を主管の径に比べて大にすると、離型剤・潤滑剤が自重で下方に集まり勝ちになって離型剤・潤滑剤の分岐管への均等量づつの分配が損なわれるので、分岐部を主管に比べて拡大することができず、粉体離型剤・潤滑剤が塊状のまま渦流で回転するだけで、十分な分散性が得られない。また、粉体離型剤・潤滑剤の密度調整も主管部より塊状で（集合された状態で）供給されるため、エア量、粉体供給量を調整しても分散性が十分ではない。したがって、金型製品部での粉体離型剤・潤滑剤の局部堆積や付着ムラの発生を、十分には抑制できない。
本発明の目的は、粉体離型剤・潤滑剤を十分に分散し粉霧状にして供給することができる、粉体離型剤・潤滑剤の粉霧状供給方法およびその装置を提供することにある。
【０００４】
【課題を解決するための手段】
上記目的を達成する本発明はつぎの通りである。
（１） 粉体離型剤・潤滑剤吐出装置から金型へのエアーによる粉体離型剤・潤滑剤の圧送経路の途中に設けた、上流側のホースに比べ拡大された容積をもつ分散容器で、容積拡大によるエアー中の粉体離型剤・潤滑剤の密度低下を利用して、粉体離型剤・潤滑剤を粉霧状に分散させる工程と、
分散容器に対して設けられ、吹き出し口が分散容器に設けられた上流側のホースの分散容器への開口位置よりも下側にある分散容器の底近傍で、分散容器の底に向かってエアーを吹き出すように開口している攪拌エアー吹込み装置からなる攪拌手段により、分散容器内の粉体離型剤・潤滑剤およびエアーを攪拌し、粉体離型剤・潤滑剤を粉霧状に攪拌する工程と、
粉霧状にされた粉体離型剤・潤滑剤を分散容器から金型へと送る工程と、
を有する粉体離型剤・潤滑剤の粉霧状供給方法。
（２） 粉体離型剤・潤滑剤吐出装置から金型へのエアーによる粉体離型剤・潤滑剤の圧送経路の途中に設けられた、上流側のホースに比べ拡大された容積をもつ分散容器と、
該分散容器に対し設けられ、吹き出し口が分散容器に設けられた上流側のホースの分散容器への開口位置よりも下側にある分散容器の底近傍で、分散容器の底に向かってエアーを吹き出すように開口している攪拌エアー吹込み装置からなる攪拌手段と、
を有する粉体離型剤・潤滑剤の粉霧状供給装置。
【０００５】
上記（１）の方法および上記（２）の装置では、上流側のホースから拡大された容積を有する分散容器に、粉体離型剤・潤滑剤と圧送エアーが流入した時に、それまで塊状（集合状態）になっていた粉体離型剤・潤滑剤はエアー中での密度が急激に低減するので、分散する。さらに、攪拌エアー吹込み装置からなる攪拌手段で、分散容器内の粉体離型剤・潤滑剤およびエアーを攪拌することにより、分散容器内で粉体離型剤・潤滑剤はさらに均一に攪拌、分散される。したがって、分散容器より下流では、粉体離型剤・潤滑剤は塊状に流れるのではなく、粉体離型剤・潤滑剤が圧送エアー中に均一に分散された流れとなる。その結果、金型製品部に流入しても、粉体離型剤・潤滑剤はエアーの流れに乗って隅々までほぼ均一に流れ、金型製品部の全域の表面にほぼ均一に付着する。これによって、離型性能が向上し、製品品質が向上する。
【０００６】
【発明の実施の形態】
以下、実施例では本発明を粉体離型剤に適用した例について説明する（潤滑剤の場合は以下の説明の粉体離型剤が粉体潤滑剤となる）。
図１は本発明の実施例の粉体離型剤の粉霧状供給方法および装置を示しており、図２は本発明の実施例の粉体離型剤の粉霧状供給方法および装置にも適用できる、金型部製品部近傍での離型剤の流れを示している。
【０００７】
まず、 本発明の実施例を、たとえば図１、図２を参照して、説明する。
本発明実施例の粉体離型剤の粉霧状供給装置では、図１に示すように、粉体離型剤吐出装置１からダイキャストマシン５の金型６へのエアーによる粉体離型剤２の圧送経路（ホース３）の途中に、上流側のホース３ａに比べ拡大された容積をもつ分散容器７が設けられている。また、分散容器７に対し、攪拌エアー１８を吹き込み分散容器７内に乱流を生じさせる攪拌エアー吹込み装置１５からなる攪拌手段８が設けられている。
ホース３は、分散容器７より上流側部分３ａと分散容器７より下流側部分３ｂとを有する。
また、粉体離型剤２は、各粉のサイズがたとえば１００×１０-6ｍ以下の、乾燥した粉体であり、たとえば、粉状黒鉛、粉状ワックス、粉状タルクを混合したものである。
【０００８】
粉体離型剤吐出装置１は、図３の従来の粉体離型剤吐出装置１と同じものであってもよい。ホース３ａ、３ｂは図３の従来の吐出ホース３と同じ種類のものであってよく、たとえば内径が８〜１０ｍｍΦのビニルチューブなどが使用される。ピンチゴム１４を通して主管に落下した粉体離型剤２は高圧エアー４（たとえば、圧力が０．１〜０．４ＭＰａのエアー）でホース３ａを介して分散容器７へ圧送される。分散容器７より上流側では粉体離型剤２は塊状になって（集合した状態で）分散容器７へと圧送される。
【０００９】
分散容器７は、その容積がホース３に比べて拡大されており、たとえば５×１０-3〜１０×１０-3Ｎｍ3 であるので、分散容器７より上流側ホース３ａの分散容器７への開口部において、流路径が急激に拡大している（たとえば５倍以上に）。これによって、粉体離型剤２と高圧エアー４との混合流は、ホース３ａから分散容器７へ出た時に、分散容器７内で、急激に拡がり、粉体離型剤２は分散し、粉霧状になる。
【００１０】
攪拌手段８は、分散容器７内の粉体離型剤２と高圧エアー４を攪拌し、エアー中での粉体離型剤２の分散を促進させるとともに、分散容器７底に沈降するかもしれない粉体離型剤２を再び分散容器７内に舞い上がらせて攪拌、分散させるものである。分散容器７の容積拡大により分散された粉体離型剤２は、攪拌手段８により分散を促進され、良好な分散状態を維持される。
【００１１】
分散容器７とダイカストマシン５の金型６は、ホース３ｂで接続されている。ホース３ｂは途中で分岐していてもよい。ホース３ｂの下流端は、金型６内の金型製品部９、または金型６の湯道１０、またはプランジャースリーブ１１、またはこれらの２カ所以上に開口している。分散容器７内の分散された粉体離型剤２はホース３ｂで金型製品部９、または金型６の湯道１０、またはプランジャースリーブ１１に圧送され、塗布される。粉体離型剤２は、たとえば金型６を開いて鋳造製品を取り出し、型閉めした後、金型６に圧送される（型開き状態でも使用可）。圧送エアーの圧力は０．１〜０．４ＭＰａ、毎ショット当たり、圧送時間は３〜１０秒である。毎ショット当たりの粉体離型剤（嵩比重が０．２〜０．３）は０．１〜３ｇであり、圧送エアー量は０．００２〜０．２Ｎｍ3 である。粉体離型剤２供給時、金型製品部９は負圧に引かれていてもよいし、あるいは負圧にされていなくてもよい。
【００１２】
本発明実施例の粉体離型剤の粉霧状供給方法は、図１に示すように、
粉体離型剤吐出装置１から金型６へのエアーによる粉体離型剤２の圧送経路（ホース３）の途中に設けた、上流側のホース３ａに比べ拡大された容積をもつ分散容器７で、容積拡大によるエアー中の粉体離型剤２の密度低下を利用して、粉体離型剤２を粉霧状に分散させる工程と、
分散容器７に対して設けられた、攪拌エアー１８を吹き込み分散容器７内に乱流を生じさせる攪拌エアー吹込み装置１５からなる攪拌手段８により、分散容器７内の粉体離型剤２およびエアーを攪拌し、粉体離型剤２を粉霧状に攪拌する工程と、
粉霧状にされた粉体離型剤２を分散容器７から金型６へと送る工程と、
を有する。
【００１３】
図１に示すように、粉体離型剤２は、分散容器７より上流側のホース部分３ａを流れている時は塊状になって（集合状態で）流れているが、分散容器７での容積拡大による、エアー中の粉体離型剤２の密度低下によって分散され、さらに分散容器７内で、攪拌エアー吹込み装置１５からなる攪拌手段８によって、さらに攪拌、分散されて、分散容器７より下流側のホース３ｂを流れている時は、塊状（集合状態）になっていない。
【００１４】
図２に示すように、粉体離型剤２は、金型６内の金型製品部９、または金型６の湯道１０、またはプランジャースリーブ１１、またはこれらの複数部位に供給され、金型製品部９、湯道１０、プランジャースリーブ１１の内表面に、隅々まで、かつ均一に塗布される。したがって、従来のような局所塗布や非均一塗布が防止される。粉体離型剤２が金型製品部９に供給される時、金型製品部９は負圧に引かれていてもよいし、あるいは負圧にされていなくてもよい。
【００１５】
本発明の実施例の粉体離型剤の粉霧状供給方法およびその装置では、図１に示すように、攪拌手段８が分散容器７に対して設けられた攪拌エアー吹込み装置１５からなる。攪拌エアー吹込み装置１５は、電磁弁１６と、攪拌エアー１８の吹込みパイプ１７を有する。電磁弁１６が開の時、攪拌エアー１８が吹込みパイプ１０の下端から分散容器７内に吹き込まれる。分散容器７の底に沈降するかもしれない粉体離型剤２を舞い上げるために、吹込みパイプ１７の吹き出し口は分散容器７の底近傍まで延びており、分散容器７の底に向けて開口している。攪拌エアー１８の吹き込みチューブは内径が約６〜１０ｍｍΦであり、攪拌エアー１８は、たとえば、圧力が０．１〜０．５ＭＰａ（たとえば、０．４ＭＰａ）のエアーである。電磁弁１６は攪拌エアー１８吹き込み時、約３〜１０秒（たとえば、５秒）、開とされる。
吹込みパイプ１７から吹き込まれたエアーは、分散容器７内に乱流を生成し、この乱流による攪拌作用で、分散容器７内に分散し漂っている離型剤２とエアーを攪拌し、均一に分散させる。吹込みパイプ１７から吹き込まれたエアーは、粉体離型剤２および粉体離型剤吐出装置からのエアーとともに、ホース３ｂを通して金型６へ送られる。
【００１６】
【発明の効果】
請求項１の粉体離型剤・潤滑剤の粉霧状供給方法によれば、上流側のホースに比べ拡大された容積をもつ分散容器で、粉体離型剤・潤滑剤を粉霧状に分散させる工程を有するので、容積拡大によるエアー中の粉体離型剤・潤滑剤の密度低下を利用して、粉体離型剤・潤滑剤を粉霧状に分散させることができる。また、攪拌手段により粉体離型剤・潤滑剤を粉霧状に攪拌する工程を有するので、分散容器内の粉体離型剤・潤滑剤をエアー中に、より一層均一に分散させることができる。その結果、粉体離型剤・潤滑剤を、金型製品部の隅々にまで、均一に塗布することができ、離型性能を向上させ、製品品質を向上させることができる。
請求項２の粉体離型剤・潤滑剤の粉霧状供給装置によれば、上流側のホースに比べ拡大された容積をもつ分散容器を設けたので、容積拡大によるエアー中の粉体離型剤・潤滑剤の密度低下を利用して、粉体離型剤・潤滑剤を粉霧状に分散させることができる。また、攪拌手段を設けたので、分散容器内の粉体離型剤・潤滑剤をエアー中に、より一層均一に分散させることができる。その結果、粉体離型剤・潤滑剤を、金型製品部の隅々にまで、均一に塗布することができ、離型性能を向上させ、製品品質を向上させることができる。
【図面の簡単な説明】
【図１】 本発明の実施例の粉体離型剤・潤滑剤の粉霧状供給方法および装置の、分散容器を概略断面で示した、系統図である。
【図２】 本発明の実施例の何れにも適用可能な、金型部位での粉体離型剤の流れを示す、金型部位の概略断面図である。
【図３】 従来の粉体離型剤・潤滑剤の粉霧状供給方法および装置の、概略断面で示した、系統図である。このうち粉体離型剤・潤滑剤吐出装置は本発明実施例にも適用される。
【図４】 図３のうち粉体離型剤・潤滑剤吐出装置の概略断面図である。
【図５】 ホース中を塊状（集合状態）で流れる粉体離型剤・潤滑剤を示す断面図である。
【図６】 従来の、金型部位での粉体離型剤・潤滑剤の流れを示す、金型部位の概略断面図である。
【図７】 特開平８−９０１９４号に開示された粉体離型剤の流れの分岐部の断面図である。
【符号の説明】
１ 粉体離型剤・潤滑剤吐出装置
２ 粉体離型剤・潤滑剤
３ 吐出ホース
３ａ 吐出ホースの、分散容器より上流側部分
３ｂ 吐出ホースの、分散容器より下流側部分
４ 高圧エアー
５ ダイキャストマシン
６ 金型
７ 分散容器
８ 攪拌手段
９ 金型製品部
１０ 湯道
１１ プランジャースリーブ
１４ ピンチゴム
１５ 攪拌エアー吹込み装置
１６ 電磁弁
１７ 吹込みパイプ
１８ 攪拌エアー [0001]
BACKGROUND OF THE INVENTION
The present invention relates to a powder release agent / lubricant supply method and a powder release agent / lubricant supply device directly used for carrying out the method.
[0002]
[Prior art]
In conventional die casting, as shown in FIG. 3 , the powder release agent / lubricant 2 that has fallen to the main pipe through the pinch rubber 14 from the powder release agent / lubricant discharge device 1 is discharged with a high-pressure air 4. , And was applied to the inner surface of the die product portion 9 (corresponding to the outer peripheral surface of the product, the same applies hereinafter).
As shown in FIG. 4 , the powder release agent / lubricant 2 is agglomerated (in an aggregated state) and falls into the main pipe, so even when pumped with high-pressure air 4, as shown in FIG. 5 , The inside of the discharge hose 3 is agglomerated (in a gathered state) and pumped. Accordingly, even when the powder release agent / lubricant 2 passes through the plunger sleeve 11 (or directly without passing through the plunger sleeve 11) and flows into the mold product part 9 and the runner 10, the degree of dispersion As shown in FIG. 6 , local deposition of the powder release agent / lubricant 2 and uneven adhesion occur.
Further, as shown in FIG. 7 , Japanese Patent Laid-Open No. 8-90194 discloses that a vortex generating pipe 13 is provided at a branching portion 12 from a main pipe to a branch pipe in a release agent / lubricant pressure feeding path to supply air, We have proposed a device that distributes release agents and lubricants to divergence pipes by vortex in equal amounts.
[0003]
[Problems to be solved by the invention]
However, the conventional mold release agent / lubricant supply device for the mold has the following problems.
(i) In the apparatus shown in FIGS. 3 to 6 , as described above, the powder release agent / lubricant flows in a lump (in an aggregated state), so that the powder release agent / lubricant is locally deposited. And uneven adhesion occur.
(ii) In the apparatus of FIG. 7 , when the diameter of the branch portion is made larger than the diameter of the main pipe, the release agent / lubricant tends to gather downward due to its own weight, and to the branch pipe of the release agent / lubricant. Since the distribution of each uniform amount is impaired, the branch part cannot be expanded compared to the main pipe, and sufficient dispersibility can be obtained simply by rotating the powder release agent / lubricant in a lump with a vortex. I can't. Further, since the density of the powder release agent / lubricant is also supplied in a lump form (in an aggregated state) from the main pipe portion, dispersibility is not sufficient even if the air amount and the powder supply amount are adjusted. Therefore, local deposition of powder release agent / lubricant and adhesion unevenness in the mold product part cannot be sufficiently suppressed.
SUMMARY OF THE INVENTION An object of the present invention is to provide a powder release agent / lubricant supply method and apparatus capable of sufficiently dispersing and supplying the powder release agent / lubricant in a powder mist form. There is.
[0004]
[Means for Solving the Problems]
The present invention for achieving the above object is as follows.
(1) Dispersion with an expanded volume compared to the upstream hose provided in the middle of the powder release agent / lubricant pumping path by air from the powder release agent / lubricant discharge device to the mold A process of dispersing the powder release agent / lubricant in the form of a mist by using the density reduction of the powder release agent / lubricant in the air due to volume expansion in the container,
Air is provided toward the bottom of the dispersion container near the bottom of the dispersion container, which is provided for the dispersion container, and the outlet of the upstream hose provided in the dispersion container is below the position of the opening to the dispersion container. the stirring air blowing instrumentation placed Ranaru stirring means is opened to blow the powder mold releasing agent, lubricant dispersion vessel and stirring the air, the powder mold releasing agent, lubricant Konakiri shape A stirring step;
A step of sending the powder release agent / lubricant in the form of mist from the dispersion container to the mold,
A method for supplying a powder release agent / lubricant in the form of a mist.
(2) Expanded volume compared to the upstream hose provided in the middle of the powder release agent / lubricant pumping path by air from the powder release agent / lubricant discharge device to the mold A dispersion vessel;
Air is provided toward the bottom of the dispersion container in the vicinity of the bottom of the dispersion container, which is provided for the dispersion container, and the outlet of the upstream hose provided in the dispersion container is lower than the opening position to the dispersion container. and stirring the air blowing instrumentation placed Ranaru stirring means is opened to blow,
A powder mist supply device for a powder release agent / lubricant having
[0005]
In the method (1) and the apparatus (2), when the powder release agent / lubricant and the pumped air flow into the dispersion container having an enlarged volume from the upstream hose, The powder release agent / lubricant that has been in the aggregated state rapidly disperses in the air and thus disperses. Further, in stirring the air blown instrumentation placed Ranaru stirring means, by stirring the powder mold releasing agent, lubricant and air dispersion in the container, the powder mold releasing agent, lubricant dispersion vessel further uniform Stir and disperse. Accordingly, the powder release agent / lubricant does not flow in the form of a lump downstream from the dispersion container, but a flow in which the powder release agent / lubricant is uniformly dispersed in the compressed air. As a result, even if it flows into the mold product part, the powder release agent / lubricant flows almost uniformly to every corner of the air flow and adheres almost uniformly to the entire surface of the mold product part. . This improves mold release performance and product quality.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
In the following examples, examples in which the present invention is applied to a powder release agent will be described (in the case of a lubricant, the powder release agent described below becomes a powder lubricant).
Figure 1 shows a powder mist supply method and apparatus of the powder mold releasing agent of the real施例of the present invention, FIG. 2 is a method of powder mist supply the powder mold releasing agent of the real施例of the present invention and The flow of the mold release agent in the vicinity of the product part of the mold part, which can be applied to the apparatus, is shown .
[0007]
First, an embodiment of the present invention will be described with reference to FIGS . 1 and 2 , for example.
In the powder mist supply device of the powder release agent of the embodiment of the present invention, as shown in FIG. 1, the powder release by air from the powder release agent discharging device 1 to the die 6 of the die cast machine 5. In the middle of the pressure-feeding path (hose 3) of the agent 2, a dispersion container 7 having an enlarged volume as compared with the upstream hose 3a is provided. Further, with respect to the dispersion vessel 7, stirring the air blowing device 1 5 or Ranaru stirring means 8 for causing turbulence in the dispersion vessel 7 blowing agitation air 18 it is provided.
The hose 3 has an upstream portion 3 a from the dispersion container 7 and a downstream portion 3 b from the dispersion container 7.
The powder release agent 2 is a dry powder having a size of each powder of 100 × 10 −6 m or less, for example, a mixture of powdered graphite, powdered wax, and powdered talc. is there.
[0008]
Powder mold releasing agent ejection apparatus 1 may be the same as the conventional powder mold releasing agent ejection apparatus 1 of FIG. The hoses 3a and 3b may be of the same type as the conventional discharge hose 3 of FIG. 3 , and for example, a vinyl tube having an inner diameter of 8 to 10 mmΦ is used. The powder release agent 2 that has fallen into the main pipe through the pinch rubber 14 is pumped to the dispersion container 7 through the hose 3a with high-pressure air 4 (for example, air having a pressure of 0.1 to 0.4 MPa). On the upstream side of the dispersion container 7, the powder release agent 2 is agglomerated (in an aggregated state) and is pumped to the dispersion container 7.
[0009]
Since the volume of the dispersion container 7 is larger than that of the hose 3, for example, 5 × 10 −3 to 10 × 10 −3 Nm 3 , the upstream hose 3 a to the dispersion container 7 from the dispersion container 7 is connected to the dispersion container 7. In the opening, the channel diameter is rapidly expanding (for example, 5 times or more). As a result, the mixed flow of the powder release agent 2 and the high-pressure air 4 spreads rapidly in the dispersion container 7 when it exits from the hose 3a to the dispersion container 7, and the powder release agent 2 is dispersed. Become powdery.
[0010]
The stirring means 8 may stir the powder release agent 2 and the high-pressure air 4 in the dispersion container 7 to promote the dispersion of the powder release agent 2 in the air and may settle to the bottom of the dispersion container 7. The powder release agent 2 that has not been moved up again in the dispersion container 7 is stirred and dispersed. The powder release agent 2 dispersed by expanding the volume of the dispersion container 7 is promoted to be dispersed by the stirring means 8 and maintained in a good dispersion state.
[0011]
The dispersion vessel 7 and the die 6 of the die casting machine 5 are connected by a hose 3b. The hose 3b may be branched on the way. The downstream end of the hose 3b opens to the mold product part 9 in the mold 6, the runner 10 of the mold 6, the plunger sleeve 11, or two or more of these. The powder release agent 2 dispersed in the dispersion container 7 is pumped and applied to the mold product part 9 or the runner 10 of the mold 6 or the plunger sleeve 11 by the hose 3b. The powder release agent 2 is, for example, opened after the mold 6 is taken out, the cast product is taken out, the mold is closed, and the mold release agent 2 is pumped to the mold 6 (can be used even in the mold open state). The pressure of the pumping air is 0.1 to 0.4 MPa, per shot, and the pumping time is 3 to 10 seconds. The powder release agent (bulk specific gravity is 0.2 to 0.3) per shot is 0.1 to 3 g, and the amount of pumping air is 0.002 to 0.2 Nm 3 . When the powder release agent 2 is supplied, the mold product part 9 may be pulled under a negative pressure or may not be under a negative pressure.
[0012]
The powder mist supply method of the powder release agent of the embodiment of the present invention, as shown in FIG.
Dispersion container having an enlarged volume compared with the upstream hose 3a provided in the middle of the pressure release path (hose 3) of the powder release agent 2 by air from the powder release agent discharging apparatus 1 to the mold 6 7 using the density reduction of the powder release agent 2 in the air due to volume expansion, and dispersing the powder release agent 2 in the form of a mist;
Provided in a dispersion container 7, by stirring air blowing device 1 5 or Ranaru stirring means 8 for causing turbulence in the stirring air 18 blown dispersion vessel 7, the powder mold releasing agent in the dispersion vessel 7 2 and air are agitated, and the powder release agent 2 is agitated in the form of mist,
Sending the powder release agent 2 in the form of a mist from the dispersion container 7 to the mold 6;
Have
[0013]
As shown in FIG. 1, the powder release agent 2 flows in a lump (in an aggregate state) when flowing through the hose portion 3 a upstream from the dispersion container 7, but in the dispersion container 7. by volume expanding, is dispersed by the density reduction of the powder mold releasing agent 2 in air, further dispersing vessel 7, by stirring air blowing device 1 5 or Ranaru stirring means 8, further stirred, dispersed, dispersed When flowing through the hose 3b on the downstream side of the container 7, it is not in a lump shape (gathered state).
[0014]
As shown in FIG. 2, the powder release agent 2 is supplied to the mold product part 9 in the mold 6, the runner 10 of the mold 6, the plunger sleeve 11, or a plurality of these parts, It is applied to the inner surface of the mold product part 9, the runner 10, and the plunger sleeve 11 uniformly and to every corner. Therefore, conventional local application and non-uniform application are prevented. When the powder release agent 2 is supplied to the mold product part 9, the mold product part 9 may be pulled under negative pressure or may not be under negative pressure.
[0015]
Flour mist supply method and apparatus of the powder mold releasing agent of the real施例of the present invention, as shown in FIG. 1, the stirring air blowing device 15 which stirring means 8 is provided in a dispersion vessel 7 Become. The stirring air blowing device 15 includes an electromagnetic valve 16 and a blowing pipe 17 for stirring air 18. When the electromagnetic valve 16 is open, the stirring air 18 is blown into the dispersion container 7 from the lower end of the blowing pipe 10. To blow up the powder release agent 2 that may settle to the bottom of the dispersion container 7, the outlet of the blowing pipe 17 extends to the vicinity of the bottom of the dispersion container 7, toward the bottom of the dispersion container 7. It is open. The blow-in tube of the stirring air 18 has an inner diameter of about 6 to 10 mmΦ, and the stirring air 18 is, for example, air having a pressure of 0.1 to 0.5 MPa (for example, 0.4 MPa). The electromagnetic valve 16 is opened for about 3 to 10 seconds (for example, 5 seconds) when the stirring air 18 is blown.
The air blown from the blowing pipe 17 generates a turbulent flow in the dispersion container 7, and agitation by the turbulent flow stirs the release agent 2 dispersed in the dispersion container 7 and the air, Disperse uniformly. The air blown from the blow pipe 17 is sent to the mold 6 through the hose 3b together with the air from the powder release agent 2 and the powder release agent discharge device .
[ 0016 ]
【The invention's effect】
According to the powder release agent / lubricant supply method of claim 1, the powder release agent / lubricant is sprayed in a dispersion container having an enlarged volume as compared with the upstream hose. Therefore, it is possible to disperse the powder release agent / lubricant in the form of a mist by utilizing the density reduction of the powder release agent / lubricant in the air due to the volume expansion. In addition, since it has a step of stirring the powder release agent / lubricant in the form of a mist by stirring means, the powder release agent / lubricant in the dispersion container can be more uniformly dispersed in the air. it can. As a result, the powder release agent / lubricant can be uniformly applied to every corner of the mold product part, and the release performance can be improved and the product quality can be improved.
According to the powder release agent / lubricant supply device of claim 2, the dispersion container having an enlarged volume compared with the hose on the upstream side is provided. The powder mold release agent / lubricant can be dispersed in the form of a mist by utilizing the decrease in density of the mold agent / lubricant. In addition, since the stirring means is provided, the powder release agent / lubricant in the dispersion container can be more uniformly dispersed in the air. As a result, the powder release agent / lubricant can be uniformly applied to every corner of the mold product part, and the release performance can be improved and the product quality can be improved.
[Brief description of the drawings]
[1] Powder mist supply method and apparatus of the powder mold releasing agent, lubricant actual施例of the present invention, showing the dispersion vessel in a schematic cross-section, it is a system diagram.
[2] In any also applicable real施例of the present invention, showing the flow of the powder mold releasing agent in the mold region is a schematic sectional view of a mold part.
FIG. 3 is a system diagram schematically showing a cross section of a conventional powder release agent / lubricant supply method and apparatus for powder mist. Among these, the powder release agent / lubricant discharge device is also applied to the embodiment of the present invention.
4 is a schematic cross-sectional view of the powder release agent / lubricant discharge device in FIG . 3. FIG.
FIG. 5 is a cross-sectional view showing a powder release agent / lubricant flowing in a lump (aggregated state) in the hose.
FIG. 6 is a schematic cross-sectional view of a mold part showing the flow of a conventional powder release agent / lubricant at the mold part.
FIG. 7 is a cross-sectional view of the branch portion of the flow of the powder release agent disclosed in Japanese Patent Application Laid-Open No. 8-90194.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Powder release agent / lubricant discharge device 2 Powder release agent / lubricant 3 Discharge hose 3a Discharge hose upstream part 3b from dispersion container Discharge hose downstream part from dispersion container 4 High pressure air 5 Die cast machine 6 mold 7 dispersing vessel 8 stirring means 9 the mold product 10 runner 11 plunger sleeve 14 Pinchigomu 15 stirring the air blowing device 16 solenoid valve 17 blow pipe 18 stirring air over

Claims (2)

粉体離型剤・潤滑剤吐出装置から金型へのエアーによる粉体離型剤・潤滑剤の圧送経路の途中に設けた、上流側のホースに比べ拡大された容積をもつ分散容器で、容積拡大によるエアー中の粉体離型剤・潤滑剤の密度低下を利用して、粉体離型剤・潤滑剤を粉霧状に分散させる工程と、
分散容器に対して設けられ、吹き出し口が分散容器に設けられた上流側のホースの分散容器への開口位置よりも下側にある分散容器の底近傍で、分散容器の底に向かってエアーを吹き出すように開口している攪拌エアー吹込み装置からなる攪拌手段により、分散容器内の粉体離型剤・潤滑剤およびエアーを攪拌し、粉体離型剤・潤滑剤を粉霧状に攪拌する工程と、
粉霧状にされた粉体離型剤・潤滑剤を分散容器から金型へと送る工程と、
を有する粉体離型剤・潤滑剤の粉霧状供給方法。Dispersion container with an expanded volume compared to the upstream hose, provided in the middle of the powder release agent / lubricant pressure feed path by air from the powder release agent / lubricant discharge device to the mold, Using the density reduction of the powder release agent / lubricant in the air due to volume expansion, a step of dispersing the powder release agent / lubricant in a mist form,
Air is provided toward the bottom of the dispersion container near the bottom of the dispersion container, which is provided for the dispersion container, and the outlet of the upstream hose provided in the dispersion container is below the position of the opening to the dispersion container. the stirring air blowing instrumentation placed Ranaru stirring means is opened to blow the powder mold releasing agent, lubricant dispersion vessel and stirring the air, the powder mold releasing agent, lubricant Konakiri shape A stirring step;
A step of sending the powder release agent / lubricant in the form of mist from the dispersion container to the mold,
A method for supplying a powder release agent / lubricant in the form of a mist. 粉体離型剤・潤滑剤吐出装置から金型へのエアーによる粉体離型剤・潤滑剤の圧送経路の途中に設けられた、上流側のホースに比べ拡大された容積をもつ分散容器と、
該分散容器に対し設けられ、吹き出し口が分散容器に設けられた上流側のホースの分散容器への開口位置よりも下側にある分散容器の底近傍で、分散容器の底に向かってエアーを吹き出すように開口している攪拌エアー吹込み装置からなる攪拌手段と、
を有する粉体離型剤・潤滑剤の粉霧状供給装置。Dispersion container with an expanded volume compared to the upstream hose, provided in the middle of the powder release agent / lubricant pumping path by air from the powder release agent / lubricant discharge device to the mold ,
Air is provided toward the bottom of the dispersion container in the vicinity of the bottom of the dispersion container, which is provided for the dispersion container, and the outlet of the upstream hose provided in the dispersion container is lower than the opening position to the dispersion container. and stirring the air blowing instrumentation placed Ranaru stirring means is opened to blow,
A powder mist supply device for a powder release agent / lubricant having
JP30525999A 1999-10-27 1999-10-27 Powder release agent / lubricant supply method and apparatus Expired - Fee Related JP3840012B2 (en)

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