JP2007136719A - Manufacturing method of oil-containing resin molded article - Google Patents

Manufacturing method of oil-containing resin molded article Download PDF

Info

Publication number
JP2007136719A
JP2007136719A JP2005330280A JP2005330280A JP2007136719A JP 2007136719 A JP2007136719 A JP 2007136719A JP 2005330280 A JP2005330280 A JP 2005330280A JP 2005330280 A JP2005330280 A JP 2005330280A JP 2007136719 A JP2007136719 A JP 2007136719A
Authority
JP
Japan
Prior art keywords
oil
molding material
cylinder
lubricating
molding
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.)
Granted
Application number
JP2005330280A
Other languages
Japanese (ja)
Other versions
JP4754329B2 (en
Inventor
Michio Hori
径生 堀
Katsuyuki Hiramatsu
克之 平松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTN Corp
Original Assignee
NTN Corp
NTN Toyo Bearing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NTN Corp, NTN Toyo Bearing Co Ltd filed Critical NTN Corp
Priority to JP2005330280A priority Critical patent/JP4754329B2/en
Publication of JP2007136719A publication Critical patent/JP2007136719A/en
Application granted granted Critical
Publication of JP4754329B2 publication Critical patent/JP4754329B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

<P>PROBLEM TO BE SOLVED: To manufacture an oil-containing resin molded article free from molding failure by making it possible to mold a molding material containing a lubricating oil so as not to mix air with the molding material when a resin and the lubricating oil or a lubricating grease are introduced into an injection molding machine to perform melt molding. <P>SOLUTION: When the resin 2 and the lubricating oil or lubricating grease 3 are introduced into the cylinder 1 of the injection molding machine as the molding material, the lubricating oil or lubricating grease 3 is allowed to stand for a required time or centrifugally separated in a container (pale container or the like) 4 to prepare molding material in a defoamed state. The lubricating material is airtightly sent under pressure by a pipeline such as a pressure-resistant flexible tube 6 or the like in order to be introduced in the cylinder 1 from a can by a pump 5 while the outer surface of the cylinder 1 into which the molding material is introduced is heated by a band heater 7. The molding material is forcibly moved toward the leading end of the cylinder 1 while mixed by a screw 8 and the molding material A' plasticized up to a molten state is injected in a roll bearing 10 from a nozzle 9, to manufacture the oil-containing molded body L. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、被潤滑の転がり軸受などの機械要素または装置に付属させて潤滑油や潤滑グリースを供給する含油樹脂成形体の製造方法に関する。   The present invention relates to a method of manufacturing an oil-containing resin molded body that is supplied with lubricating oil or lubricating grease attached to a machine element or apparatus such as a rolling bearing to be lubricated.

一般に、転がり軸受などの内・外輪および保持器と転動体との潤滑には、半固体状のグリースが使用されているが、大きな遠心力が作用してグリースが流動する場合や、その使用条件として油滴や蒸気の飛散防止が求められる印刷機械、撚線機、電動機器もしくは自動車部品等の各種軸受に使用される場合などには、含油樹脂成形体が用いられている。   Generally, semi-solid grease is used to lubricate inner and outer rings, such as rolling bearings, and cages, and rolling elements. For example, oil-impregnated resin molded bodies are used when used in various bearings such as printing machines, twisting machines, electric appliances, and automobile parts that are required to prevent oil droplets and steam from scattering.

例えば超高分子量ポリエチレン等のプラスチックと潤滑グリースを混合した含油樹脂（固形潤滑剤とも別称される。）を軸受内空間に充填し、次いで加熱して固形化した軸受用の固形潤滑剤（ＮＴＮ社製：ポリルーブ）が周知であり、このような固形潤滑剤を組込んで潤滑される軸受は、上記過酷な条件でも長期使用が可能である。   For example, a solid lubricant for bearings (NTN) filled with oil-impregnated resin (also called solid lubricant) mixed with plastic such as ultra-high molecular weight polyethylene and lubricating grease and then solidified by heating. (Manufactured by Polylube) is well known, and such a bearing lubricated with a solid lubricant can be used for a long time even under the above severe conditions.

このような軸受用の固形潤滑剤は、超高分子量のポリエチレンまたは、超高分子量のポリオレフィンとこのポリエチレンまたは、ポリオレフィンの融解温度より高い滴点を有する潤滑グリースを配合した潤滑剤を軸受の内部空間に充填した後、軸受をヒータ使用の加熱器（恒温槽）を用いて、超高分子量ポリエチレンまたは、超高分子量ポリオレフィンの融解温度に加熱し、潤滑剤を固形化し成形する（特許文献１）。   Such a solid lubricant for a bearing is composed of an ultra-high molecular weight polyethylene or a lubricant containing an ultra-high molecular weight polyolefin and a lubricating grease having a dropping point higher than the melting temperature of the polyethylene or polyolefin. Then, the bearing is heated to the melting temperature of ultra high molecular weight polyethylene or ultra high molecular weight polyolefin using a heater (constant temperature bath) using a heater, and the lubricant is solidified and molded (Patent Document 1).

さらに、図２に示すように、固形潤滑剤を効率よく軸受内で成形するためには、射出成形機のシリンダ１に供給された樹脂２を溶融しながら、ホッパー２０から潤滑油または潤滑グリース３をシリンダ１内に導入し、両者を混合しながら加圧してシリンダ先端からゲート２１を経由して金型２２内のキャビティー、または転がり軸受内に直接に射出成形することが知られている（特許文献２）。   Further, as shown in FIG. 2, in order to efficiently mold the solid lubricant in the bearing, the lubricating oil or lubricating grease 3 is supplied from the hopper 20 while melting the resin 2 supplied to the cylinder 1 of the injection molding machine. Is introduced into the cylinder 1 and pressurized while being mixed, and injection molding is directly performed from the tip of the cylinder through the gate 21 into the cavity in the mold 22 or the rolling bearing ( Patent Document 2).

特公昭６３−２３２３９号公報Japanese Patent Publication No. 63-23239 特開２００４−２６２２５０号公報JP 2004-262250 A

しかし、上記した従来の射出成形機を用いた含油樹脂成形体の製造方法では、ホッパー２０から潤滑油または潤滑グリース３を自重で射出成形機内に導入しているため、ホッパーの上面開口は大気に接するように開放されており、ここから空気が潤滑油または潤滑グリースに混入する場合がある。   However, in the method for producing an oil-containing resin molded body using the conventional injection molding machine described above, the lubricating oil or the lubricating grease 3 is introduced into the injection molding machine by its own weight from the hopper 20, so that the upper surface opening of the hopper is exposed to the atmosphere. There is a case where air is mixed into lubricating oil or lubricating grease.

その際、空気粒が溶融した樹脂に混じると、先端のノズルまでの経路中で脱気することは困難であり、成形体に空気粒が混じって気孔が形成され、ショートショットと呼ばれる成形不良を起こす可能性もある。   At that time, if air particles are mixed with the molten resin, it is difficult to deaerate in the path to the nozzle at the tip, and air particles are mixed into the molded body to form pores, resulting in a molding defect called short shot. There is also the possibility of waking up.

このような空気混入による成形不良が起きる問題は、液体やスラリー状の原料をスクリュ式またはプランジャ式の射出成形機に供給し、含油樹脂成形体を製造する場合に特有である。例えば、原料がペレットのように流動しながら連通する空隙を形成するものなら、シリンダ内に背圧をかけて混入した空気を後方へ逃がすことも可能であるが、原料が液状ではそれができないことから、上記のような問題が起こる。   The problem of such molding failure due to air mixing is unique when an oil-containing resin molding is produced by supplying a liquid or slurry-like raw material to a screw-type or plunger-type injection molding machine. For example, if the raw material forms a void that communicates while flowing like a pellet, it is possible to release the mixed air by applying back pressure in the cylinder, but it cannot be done if the raw material is liquid. Therefore, the above problems occur.

また、ホッパーを用いて原料を供給する際、重力（自重）による流動性で原料を残さずに完全に送り出すことは困難であり、少量ずつホッパーに付着したまま残存する。また、ホッパーでは送り出し速度を任意に加減できないので、原料供給速度の調整による製造効率の改善は困難であった。   In addition, when the raw material is supplied using a hopper, it is difficult to completely feed out the raw material without leaving the raw material due to the fluidity due to gravity (self-weight), and it remains attached to the hopper little by little. In addition, since the delivery speed cannot be arbitrarily adjusted by the hopper, it is difficult to improve the production efficiency by adjusting the raw material supply speed.

なお、特許文献２には、ホッパー内にフィードスクリュにて原料を強制的に供給するものも開示されているが、その場合にホッパーの上面開口は大気に接しているから、ここから空気の混入の可能性がある。   In addition, Patent Document 2 discloses that a raw material is forcibly supplied to the hopper with a feed screw. In this case, since the upper surface opening of the hopper is in contact with the atmosphere, air is mixed from here. There is a possibility.

そこで、この発明の課題は、上記した問題点を解決し、射出成形機に樹脂および潤滑油または潤滑グリースを導入して溶融成型する際、潤滑油を含む成形材料に空気が混入しないようにして成形可能として、成形不良のない含油樹脂成形体を製造することである。   Accordingly, an object of the present invention is to solve the above-described problems and prevent air from being mixed into a molding material containing lubricating oil when resin and lubricating oil or lubricating grease are introduced into an injection molding machine and melt-molded. An oil-impregnated resin molded body free from molding defects is manufactured as possible.

また、この発明は、上記課題の解決と共に、潤滑油または潤滑グリースの混合量を適宜に調節できる含油樹脂成形体の製造方法とすることを第２の課題としている。   Moreover, this invention makes it the 2nd subject to set it as the manufacturing method of the oil-containing resin molding which can adjust the mixing amount of lubricating oil or lubricating grease suitably with the solution of the said subject.

上記第１の課題を解決するために、この発明においては、射出成形機のシリンダ内に樹脂と潤滑油または潤滑グリースを必須成分とする成形材料を導入し、この成形材料を加熱および混合しながら前記シリンダの先端に向けて強制移動させ、可塑化させた状態でノズルから射出して成形体を製造する含油樹脂成形体の製造方法において、前記成形材料のうち、潤滑油または潤滑グリースを気泡の含まれない状態に調製し、これを前記シリンダ内に管路で気密に圧送することを特徴とする含油樹脂成形体の製造方法としたのである。   In order to solve the first problem, in the present invention, a molding material containing resin and lubricating oil or lubricating grease as essential components is introduced into a cylinder of an injection molding machine, and the molding material is heated and mixed. In the method of manufacturing an oil-containing resin molded body in which a molded body is manufactured by forcibly moving toward the tip of the cylinder and injecting from a nozzle in a plasticized state, the lubricating oil or the lubricating grease is removed from the molding material. The oil-containing resin molded product was produced by preparing it so as not to be contained and pumping it hermetically in the cylinder through a pipe line.

上記したように構成されるこの発明の含油樹脂成形体の製造方法では、気泡の含まれない状態に調製された流動性潤滑剤が、シリンダ内に管路で気密に圧送されるので、成形材料に気泡が混入しない。   In the manufacturing method of the oil-impregnated resin molded body of the present invention configured as described above, the flowable lubricant prepared in a state free of bubbles is air-tightly pumped into the cylinder through a pipe line. Bubbles do not get mixed in.

そのため、シリンダ内で溶融して液体やスラリー状となった樹脂に対し、混合される潤滑油またはグリースからの気泡混入がないので、成形不良のない緻密な含油樹脂成形体を製造できる。   Therefore, since there is no mixing of bubbles from the lubricating oil or grease mixed with the resin melted in the cylinder into a liquid or slurry, a dense oil-containing resin molded body free from molding defects can be produced.

このような緻密な含油樹脂成形体を、より確実に製造できる成形材料の組成としては、超高分子量ポリエチレン樹脂を含むポリエチレン樹脂１０〜８０重量％と、潤滑油またはグリース２０〜９０重量％を含有する成形材料である。潤滑油または潤滑グリースが２０重量％未満の配合割合では、成形体に潤滑性が充分になく、９０重量％を超える配合割合では、成形性を確実にすること、成形後の強度を充分に得ることが困難になって好ましくないからである。   The composition of the molding material that can produce such a dense oil-containing resin molding more reliably includes 10 to 80% by weight of a polyethylene resin containing an ultrahigh molecular weight polyethylene resin and 20 to 90% by weight of a lubricating oil or grease. Molding material. When the blending ratio of the lubricating oil or the lubricating grease is less than 20% by weight, the molded body does not have sufficient lubricity. When the blending ratio exceeds 90% by weight, the moldability is ensured and the strength after molding is sufficiently obtained. This is because it becomes difficult to do so.

上記の第１および第２の課題を解決するために、上記の工程における管路が、ポンプを介設した管路である含油樹脂成形体の製造方法を採用したのである。   In order to solve the above first and second problems, an oil-containing resin molded body manufacturing method in which the pipe line in the above process is a pipe line provided with a pump is employed.

この発明では、ポンプによって潤滑油または潤滑グリースが、管路を任意の速度で圧送されるから、シリンダ内の成形材料の移動速度に合わせて、潤滑油または潤滑グリースを単位時間当りに必要な量だけ供給することができる。   In this invention, since the lubricating oil or lubricating grease is pumped by the pump at an arbitrary speed, the amount of lubricating oil or lubricating grease required per unit time is adjusted in accordance with the moving speed of the molding material in the cylinder. Can only be supplied.

また、管路のポンプより下流に脱気用バルブが付設された管路は、万一、潤滑油または潤滑グリースに気泡が混入した場合において、バルブから不良な潤滑油または潤滑グリースを抜き取って、シリンダ内に供給されないようにすることができる。この操作によって緻密で成形不良のない含油樹脂成形体をより確実に製造できる。   Also, in the case of a pipeline with a deaeration valve downstream from the pump of the pipeline, in the unlikely event that bubbles are mixed in the lubricating oil or lubricating grease, remove the defective lubricating oil or lubricating grease from the valve, It can be prevented from being supplied into the cylinder. By this operation, an oil-containing resin molded body that is dense and does not have molding defects can be more reliably produced.

この発明は、予め潤滑油または潤滑グリースを脱泡状態に調製し、これを射出成形機のシリンダ内に管路を経由して気密に圧送したので、シリンダ内で溶融した樹脂に潤滑油またはグリースを導入する際に、気泡が混入せず、成形不良のない緻密な含油樹脂成形体を製造できるという利点がある。   In this invention, the lubricant or grease is prepared in advance in a defoamed state, and this is air-tightly fed into the cylinder of the injection molding machine via a pipe line. There is an advantage that a dense oil-impregnated resin molded body free from air bubbles and having no molding defects can be produced.

また、管路に、ポンプを介設すれば、シリンダ内の成形材料の移動速度を適当に変えても、常に最適量の潤滑油または潤滑グリースが供給されることが可能になり、最適組成の含油樹脂成形体を製造できる。   In addition, if a pump is installed in the pipeline, the optimum amount of lubricating oil or lubricating grease can always be supplied even if the moving speed of the molding material in the cylinder is appropriately changed. An oil-containing resin molded product can be produced.

さらにまた、潤滑油および潤滑グリースを所定の配合割合とする所定成形材料の製法を採用することにより、成形不良のない緻密な含油樹脂成形体を確実に成形できる。
また、管路の所定位置に脱気用バルブが付設されると、緻密で成形不良のない含油樹脂成形体を確実に製造できる利点もある。 Furthermore, by adopting a method for producing a predetermined molding material having a predetermined blending ratio of lubricating oil and lubricating grease, a dense oil-containing resin molded body free from molding defects can be reliably molded.
Further, when a deaeration valve is provided at a predetermined position of the pipe line, there is an advantage that an oil-containing resin molded body that is dense and does not have molding defects can be reliably manufactured.

この発明の実施形態を以下に添付図面に基づいて説明する。
図１に示すように、実施形態は、射出成形機のシリンダ１内に成形材料として樹脂２と潤滑油または潤滑グリース３を導入する際に、潤滑油または潤滑グリース３を容器（ペール缶など）４内に所要時間静置または遠心分離等することで脱泡状態に調製したものを使用し、これを缶内からポンプ５でシリンダ１内に導入するために、耐圧性のフレキシブルチューブ６などの管路で気密に圧送し、これら成形材料を導入したシリンダ１の外面をバンドヒータ７で加熱すると共に、スクリュ８で混合しながらシリンダ１の先端に向けて強制移動させ、溶融状態にまで可塑化させた成形材料Ａ´を、ノズル９から転がり軸受１０の内部に射出して含油樹脂成形体Ｌを製造する方法を示すものである。 Embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in FIG. 1, in the embodiment, when the resin 2 and the lubricating oil or lubricating grease 3 are introduced as molding materials into the cylinder 1 of the injection molding machine, the lubricating oil or lubricating grease 3 is placed in a container (such as a pail can). In order to introduce a defoamed state by allowing it to stand still or centrifuging in 4 for a required time, and introducing it into the cylinder 1 with a pump 5 from inside the can, a pressure-resistant flexible tube 6 or the like The outer surface of the cylinder 1 into which these molding materials are introduced is heated by a band heater 7 while being forcedly moved toward the tip of the cylinder 1 while being mixed by a screw 8 and plasticized to a molten state. A method of manufacturing the oil-containing resin molded body L by injecting the molded molding material A ′ from the nozzle 9 into the rolling bearing 10 is shown.

この発明に用いる射出成形機は、特にその型式や混合機構や加熱装置を限定したものではなく、軸受または成形用金型などへの溶融材料の供給を行なうための装置であり、射出プランジャまたはスクリュのいずれの前進圧力によるものでもよく、シリンダ内を所要温度に加熱可能な周知の射出成形機（プランジャ式、スクリュープリプラ式、インラインスクリュー式など）を採用すればよい。   The injection molding machine used in the present invention is not particularly limited in its type, mixing mechanism or heating device, and is an apparatus for supplying a molten material to a bearing or a molding die, and is an injection plunger or screw. Any of these forward pressures may be used, and a well-known injection molding machine (plunger type, screw pre-pull type, in-line screw type, etc.) capable of heating the inside of the cylinder to a required temperature may be adopted.

この発明に用いる成形材料のうち、樹脂は、射出成形の可能な熱可塑性樹脂または熱硬化性樹脂のいずれであってもよく、また弾性のあるゴムまたはエラストマーと称される樹脂であってもよい。たとえばポリエチレン、超高分子量ポリエチレン、ポリプロピレン、ポリブチレン、ポリメチルペンテン等のポリオレフィン系樹脂、フェノール樹脂、ウレタン樹脂などの熱硬化性樹脂または周知の弾性ゴム材料が挙げられる。   Among the molding materials used in the present invention, the resin may be either a thermoplastic resin or a thermosetting resin that can be injection-molded, or may be a resin called elastic rubber or elastomer. . Examples thereof include polyolefin resins such as polyethylene, ultrahigh molecular weight polyethylene, polypropylene, polybutylene, and polymethylpentene, thermosetting resins such as phenol resins and urethane resins, and well-known elastic rubber materials.

これらの樹脂には、その機械的強度を高める等の物性改良を目的として種々の樹脂を配合してもよく、例えばポリアミド、ポリカーボネート、ポリブチレンテレフタレート、ポリフェニレンサルファイド、ポリエーテルスルホン、ポリエーテルエーテルケトン、ポリアミドイミド、ポリスチレン、ＡＢＳ樹脂、不飽和ポリエステル樹脂、尿素樹脂、メラニン樹脂、フェノール樹脂、ポリイミド樹脂、エポキシ樹脂等の熱硬化性または熱可塑性樹脂を添加することができる。   These resins may be blended with various resins for the purpose of improving physical properties such as increasing their mechanical strength, such as polyamide, polycarbonate, polybutylene terephthalate, polyphenylene sulfide, polyethersulfone, polyetheretherketone, Thermosetting or thermoplastic resins such as polyamideimide, polystyrene, ABS resin, unsaturated polyester resin, urea resin, melanin resin, phenol resin, polyimide resin, and epoxy resin can be added.

この発明に用いる潤滑油としては、ポリα−オレフィン油のようなパラフィン系炭化水素油、ナフテン系炭化水素油、鉱油、ジアルキルジフェニルエーテル油などのエーテル油、フタル酸エステルのようなエステル油等が挙げられ、これらの単独若しくは混合油の形で混ぜて調製したものでもよい。またこれら潤滑油に対して、黒鉛、窒化硼素、フッ素樹脂、二硫化モリブデン、二硫化タングステン等の固体潤滑剤を配合してもよく、さらに酸化防止剤、錆止め剤、摩耗防止剤、消泡剤、極圧剤等の各種添加剤を加えたものでもよい。   Examples of the lubricating oil used in the present invention include paraffinic hydrocarbon oils such as poly α-olefin oils, ether oils such as naphthenic hydrocarbon oils, mineral oils and dialkyldiphenyl ether oils, and ester oils such as phthalate esters. These may be prepared by mixing them alone or in the form of a mixed oil. These lubricants may be blended with solid lubricants such as graphite, boron nitride, fluororesin, molybdenum disulfide, tungsten disulfide and the like, and further antioxidants, rust inhibitors, antiwear agents, antifoaming agents. In addition, various additives such as extreme pressure agents may be added.

この発明に用いる潤滑グリースは、上記した潤滑油を基油として、これを増ちょうさせた周知の潤滑グリースであり、増ちょう剤の例としては、リチウム石鹸、リチウムコンプレックス石鹸、カルシウム石鹸、カルシウムコンプレックス石鹸、アルミニウム石鹸、アルミニウムコンプレックス石鹸等の石鹸類、ジウレア化合物、ポリウレア化合物などのウレア系化合物などが挙げられる。   The lubricating grease used in the present invention is a well-known lubricating grease in which the above-described lubricating oil is used as a base oil, and examples of the thickening agent include lithium soap, lithium complex soap, calcium soap, and calcium complex. Examples include soaps such as soap, aluminum soap and aluminum complex soap, and urea compounds such as diurea compounds and polyurea compounds.

このような成形材料のうち、特に耐熱性および潤滑性を安定させるために好ましい材料の配合例としては、超高分子量ポリエチレン樹脂またはこれを含むポリエチレン樹脂１０〜８０重量％と、潤滑油またはグリース２０〜９０重量％を含有する成形材料が挙げられる。   Among such molding materials, particularly preferable examples of blending materials for stabilizing heat resistance and lubricity include 10 to 80% by weight of an ultrahigh molecular weight polyethylene resin or a polyethylene resin containing the same, and lubricating oil or grease 20 Examples include molding materials containing ˜90% by weight.

上述した潤滑油または潤滑グリースは、成形材料に混合前に、予め遠心分離機または真空脱気処理または長時間静置されるなどの周知の脱気泡処理によって脱泡状態にするか、またはそのような脱泡状態の市販品を使用し、これを密閉性容器（ペール缶など）に収納されたものが使用に便利であり、かつ含油樹脂成形体の品質安定化のために好ましい。   The above-described lubricating oil or lubricating grease is put into a defoamed state by a known defoaming process such as a centrifugal separator or a vacuum degassing process or left standing for a long time before being mixed with a molding material, or as such. A commercially available product in a defoamed state, which is housed in a hermetic container (such as a pail can), is convenient for use and is preferable for stabilizing the quality of the oil-containing resin molded product.

密閉性容器は、潤滑油または潤滑グリースを脱泡状態に保つためのものであるが、通常、市販の潤滑グリースが収容されているペール缶、その他の密閉性容器をそのまま転用できる。この発明に使用する直前に、遠心分離装置などで気泡のない状態に調製する場合は、調製された潤滑油または潤滑グリースを装置から直接に管路に導入してもよい。   The hermetic container is for keeping the lubricating oil or lubricating grease in a defoamed state, but normally, a pail can containing a commercially available lubricating grease or other hermetic containers can be used as they are. Immediately before use in the present invention, when preparing a state free of bubbles with a centrifugal separator or the like, the prepared lubricating oil or lubricating grease may be introduced directly from the apparatus into the pipeline.

成形材料の樹脂は、図外のホッパーからペレットをシリンダ１の後端から内部に供給してもよく、またシリンダ１の後端からスクリュ８を油圧シリンダなどで後退させてからバッチ式に導入してもよい。このようにしてシリンダ１内に導入された成形材料の樹脂は、電動モータＭで回転するスクリュ８とシリンダ１の間に形成された螺旋状通路を回転させることで先端方向へ移送されながらバンドヒータ７で加熱され、かつスクリュ８の軸径の増大変化によって加圧されつつ、溶融および混練される。   The resin of the molding material may be supplied to the inside from the rear end of the cylinder 1 with pellets from a hopper (not shown), and the screw 8 is retracted from the rear end of the cylinder 1 with a hydraulic cylinder or the like and then introduced into a batch system. May be. In this way, the resin of the molding material introduced into the cylinder 1 is transferred in the distal direction by rotating a spiral passage formed between the screw 8 rotated by the electric motor M and the cylinder 1, and the band heater. 7 and is melted and kneaded while being pressurized by an increasing change in the shaft diameter of the screw 8.

また、樹脂には、溶融直前に潤滑油または潤滑グリースが配合される。この配合装置は、予め脱泡状態に調整されている市販のペール缶からなる容器４内の潤滑油または潤滑グリースを、いわゆるグリースポンプＰでもって吸い上げ、耐圧性のあるフレキシブルチューブ６でシリンダ１の側面に形成されている注入孔１１から圧入することにより行なわれる。   The resin is mixed with lubricating oil or lubricating grease immediately before melting. In this blending device, lubricating oil or lubricating grease in a container 4 made of a commercially available pail can that has been previously defoamed is sucked up by a so-called grease pump P, and a flexible tube 6 having pressure resistance is used to This is performed by press-fitting from the injection hole 11 formed on the side surface.

図示したグリースポンプＰは、グリース（ペール）缶からなる容器４内から先端開口の吸入管１２で潤滑グリース３を吸上げ、フレキシブルチューブ６の先端から潤滑グリース３を吐出できる電動のポンプ５を備えたものであり、ペール缶などからなる容器４の上面開口部を密閉する蓋１３は、蝶ボルト１４などで蓋１３の周縁に固定され、この蓋１３の中央に吸入管１２と、この外側にスライド自在に案内される落とし蓋１５を備えている。   The illustrated grease pump P includes an electric pump 5 capable of sucking the lubricating grease 3 from the inside of a container 4 made of a grease (pail) can through a suction pipe 12 having an opening at the tip and discharging the lubricating grease 3 from the tip of the flexible tube 6. A lid 13 that seals the upper opening of the container 4 made of a pail can is fixed to the periphery of the lid 13 with a butterfly bolt 14 or the like. A drop lid 15 is slidably guided.

落とし蓋１５は、潤滑油または潤滑グリースの表面に接した（浮いた）状態で容器４の内周面とできるだけ気密状態で摺接できるよう深皿形状に設けたものが好ましい。このような落とし蓋１５は、潤滑グリース３の表面を平らに均すと共に、潤滑油または潤滑グリースの液面が徐々に下がった際に容器４の内周面に不使用のグリースが付着することなく、潤滑グリースを最後まで無駄の無く使用できるように配慮したものである。また、落とし蓋１５は、吸入管１２の外周に沿って長手方向に空気の流通隙間が形成されないように設けられたものであり、ポンプ５が空気を吸入しないようにしている。   The drop lid 15 is preferably provided in a deep dish shape so as to be in sliding contact with the inner peripheral surface of the container 4 in an airtight state as much as possible while in contact (floating) with the surface of the lubricating oil or lubricating grease. Such a drop lid 15 smoothens the surface of the lubricating grease 3 and causes unused grease to adhere to the inner peripheral surface of the container 4 when the level of the lubricating oil or the lubricating grease gradually decreases. The lubrication grease can be used without waste until the end. The drop lid 15 is provided so as not to form an air circulation gap in the longitudinal direction along the outer periphery of the suction pipe 12 so that the pump 5 does not suck air.

そして、フレキシブルチーブ６のポンプ５より下流側には、脱気用バルブ１６が付設されており、この脱気用バルブ１６を所要時間だけ開放することにより、気泡が混入した場合に脱気用バルブ１６から一部の潤滑油または潤滑グリースを抜き取り、シリンダ１内に供給されないようにすることができる。   Further, a deaeration valve 16 is provided downstream of the pump 5 of the flexible tube 6, and the deaeration valve 16 is opened only for a required time, so that when air bubbles are mixed, the deaeration valve 16 is opened. A part of the lubricating oil or lubricating grease can be extracted from 16 so as not to be supplied into the cylinder 1.

溶融直前の成形材料Ａ´に対して、潤滑油または潤滑グリース３がシリンダ１内に圧入されると、所定時間だけスクリュ８が回転して材料が充分に混練および加熱し、その後、リング状の逆流防止弁１７の内側に流路を通って成形材料がシリンダ１の先端部に溜められる。そして、溜められる成形材料の体積増加に伴ってスクリュ８は後退し、一定距離だけ後退してから、その回転が自動的に止まり、次いで射出時には図外の油圧シリンダでスクリュ８が回転しながら前進する。   When the lubricating oil or the lubricating grease 3 is pressed into the cylinder 1 with respect to the molding material A ′ immediately before melting, the screw 8 rotates for a predetermined time to sufficiently knead and heat the material, and then the ring-shaped The molding material is accumulated at the tip of the cylinder 1 through the flow path inside the backflow prevention valve 17. Then, as the volume of the molding material to be stored increases, the screw 8 moves backward, moves backward by a certain distance, and then automatically stops rotating. Then, at the time of injection, the screw 8 moves forward while rotating by a hydraulic cylinder (not shown). To do.

前進するスクリュ８のヘッド１８は、リング状の逆流防止弁１７によって、射出する時には後方流路が閉鎖されるので、シリンダ１の先端部内に溜められた成形材料Ａ´は、ノズル９から金型や転がり軸受１０の内・外輪の空間をキャビティーとして気泡を含まない含油樹脂成形体が射出成型されるのである。
なお、図１では、片側端面にシール部品１９を設けた転がり軸受を示したが、両端面に取り付けてもよく、また成形用金型を用いてシール部品１９を省略してもよい。 The head 18 of the advancing screw 8 is closed by the ring-shaped backflow prevention valve 17 so that the rear flow path is closed when injected, so that the molding material A ′ accumulated in the tip of the cylinder 1 is transferred from the nozzle 9 to the mold. In other words, the oil-impregnated resin molded body containing no air bubbles is injection-molded using the inner and outer ring spaces of the rolling bearing 10 as cavities.
Although FIG. 1 shows a rolling bearing in which a seal part 19 is provided on one end face, it may be attached to both end faces, or the seal part 19 may be omitted using a molding die.

実施形態を示す射出成形機と潤滑グリースと管路の一部断面正面図Partial cross-sectional front view of injection molding machine, lubricating grease, and pipeline showing an embodiment 従来例を示す射出成形機と潤滑グリースとホッパーの一部断面正面図Partial sectional front view of injection molding machine, lubricating grease and hopper showing conventional example

符号の説明Explanation of symbols

１ シリンダ
２ 樹脂
３ 潤滑グリース
４ 容器
５ ポンプ
６ フレキシブルチューブ
７ バンドヒータ
８ スクリュ
９ ノズル
１０ 転がり軸受
１１ 注入孔
１２ 吸入管
１３ 蓋
１４ 蝶ボルト
１５ 落とし蓋
１６ 脱気用バルブ
１７ 逆流防止弁
１８ ヘッド
２０ ホッパー
２１ ゲート
２２ 金型
Ａ、Ａ´、Ｂ 成形材料
Ｌ 含油樹脂成形体
Ｐ グリースポンプ DESCRIPTION OF SYMBOLS 1 Cylinder 2 Resin 3 Lubrication grease 4 Container 5 Pump 6 Flexible tube 7 Band heater 8 Screw 9 Nozzle 10 Rolling bearing 11 Injection hole 12 Intake pipe 13 Lid 14 Butterfly bolt 15 Drop cover 16 Deaeration valve 17 Backflow prevention valve 18 Head 20 Hopper 21 Gate 22 Mold A, A ', B Molding material L Oil-impregnated resin molding P Grease pump

Claims (4)

射出成形機のシリンダ内に樹脂と潤滑油または潤滑グリースを必須成分とする成形材料を導入し、この成形材料を加熱および混合しながら前記シリンダの先端に向けて強制移動させ、可塑化させた状態でノズルから射出して成形体を製造する含油樹脂成形体の製造方法において、
前記成形材料のうち、潤滑油または潤滑グリースを気泡の含まれない状態に調製し、これを前記シリンダ内に管路で気密に圧送することを特徴とする含油樹脂成形体の製造方法。 A molding material containing resin and lubricating oil or lubricating grease as essential components is introduced into the cylinder of an injection molding machine, and the molding material is forcibly moved toward the tip of the cylinder while being heated and mixed, and plasticized. In the method for producing an oil-containing resin molded body in which a molded body is produced by injection from a nozzle at
A method for producing an oil-containing resin molded article, comprising: preparing a lubricating oil or a lubricating grease in the molding material so as not to contain bubbles, and air-tightly feeding it into the cylinder through a pipe line. 成形材料が、超高分子量ポリエチレン樹脂を含むポリエチレン樹脂１０〜８０重量％と、潤滑油またはグリース２０〜９０重量％を含有する成形材料である請求項１に記載の含油樹脂成形体の製造方法。   The method for producing an oil-containing resin molded article according to claim 1, wherein the molding material is a molding material containing 10 to 80% by weight of a polyethylene resin containing an ultrahigh molecular weight polyethylene resin and 20 to 90% by weight of a lubricating oil or grease. 管路が、ポンプを介設した管路である請求項１または２に記載の含油樹脂成形体の製造方法。   The method for producing an oil-containing resin molded body according to claim 1 or 2, wherein the pipe is a pipe having a pump. 管路が、ポンプの下流に脱気用バルブを付設した管路である請求項１〜３のいずれかに記載の含油樹脂成形体の製造方法。   The method for producing an oil-containing resin molded body according to any one of claims 1 to 3, wherein the pipe line is a pipe line provided with a deaeration valve downstream of the pump.
JP2005330280A 2005-11-15 2005-11-15 Method for producing oil-impregnated resin molded body Expired - Fee Related JP4754329B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005330280A JP4754329B2 (en) 2005-11-15 2005-11-15 Method for producing oil-impregnated resin molded body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005330280A JP4754329B2 (en) 2005-11-15 2005-11-15 Method for producing oil-impregnated resin molded body

Publications (2)

Publication Number Publication Date
JP2007136719A true JP2007136719A (en) 2007-06-07
JP4754329B2 JP4754329B2 (en) 2011-08-24

Family

ID=38200167

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005330280A Expired - Fee Related JP4754329B2 (en) 2005-11-15 2005-11-15 Method for producing oil-impregnated resin molded body

Country Status (1)

Country Link
JP (1) JP4754329B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105822887A (en) * 2016-05-27 2016-08-03 昆山邦泰汽车零部件制造有限公司 Robot for dripping lubricating oil
EP3135452A1 (en) * 2010-10-08 2017-03-01 3M Innovative Properties Company Method of producing a colored plastic article
USD898868S1 (en) 2018-09-12 2020-10-13 3M Innovative Properties Company Liquid delivery system lid
JP2021059098A (en) * 2019-10-09 2021-04-15 福井精機工業株式会社 Thermoplastic resin molding method and thermoplastic resin molding device
USD918339S1 (en) 2018-09-12 2021-05-04 3M Innovative Properties Company Liquid delivery system cup
USD919045S1 (en) 2018-09-12 2021-05-11 3M Innovative Properties Company Liquid delivery system coupler

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105864618A (en) * 2016-05-27 2016-08-17 昆山邦泰汽车零部件制造有限公司 Robot capable of fully-automatically dripping lubricating oil

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10323871A (en) * 1997-01-24 1998-12-08 Misawa Homes Co Ltd Device and method for resin molding
JP2001121250A (en) * 1999-10-22 2001-05-08 Toshiba Mach Co Ltd Raw material pouring apparatus in forming machine
JP2002347073A (en) * 2001-05-22 2002-12-04 Nissei Plastics Ind Co Material resin feeder of injection molding machine by vacuum hopper
JP2004262250A (en) * 2004-05-25 2004-09-24 Nsk Ltd Manufacturing method of oil-containing polymer molded product and product obtained by this method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10323871A (en) * 1997-01-24 1998-12-08 Misawa Homes Co Ltd Device and method for resin molding
JP2001121250A (en) * 1999-10-22 2001-05-08 Toshiba Mach Co Ltd Raw material pouring apparatus in forming machine
JP2002347073A (en) * 2001-05-22 2002-12-04 Nissei Plastics Ind Co Material resin feeder of injection molding machine by vacuum hopper
JP2004262250A (en) * 2004-05-25 2004-09-24 Nsk Ltd Manufacturing method of oil-containing polymer molded product and product obtained by this method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3135452A1 (en) * 2010-10-08 2017-03-01 3M Innovative Properties Company Method of producing a colored plastic article
CN105822887A (en) * 2016-05-27 2016-08-03 昆山邦泰汽车零部件制造有限公司 Robot for dripping lubricating oil
USD898868S1 (en) 2018-09-12 2020-10-13 3M Innovative Properties Company Liquid delivery system lid
USD918339S1 (en) 2018-09-12 2021-05-04 3M Innovative Properties Company Liquid delivery system cup
USD919045S1 (en) 2018-09-12 2021-05-11 3M Innovative Properties Company Liquid delivery system coupler
JP2021059098A (en) * 2019-10-09 2021-04-15 福井精機工業株式会社 Thermoplastic resin molding method and thermoplastic resin molding device
JP7093566B2 (en) 2019-10-09 2022-06-30 福井精機工業株式会社 Thermoplastic resin molding method and thermoplastic resin molding equipment

Also Published As

Publication number Publication date
JP4754329B2 (en) 2011-08-24

Similar Documents

Publication Publication Date Title
JP4754329B2 (en) Method for producing oil-impregnated resin molded body
CN112060457B (en) Apparatus for manufacturing foam molded body, screw of injection molding apparatus, and injection molding apparatus
JP4951546B2 (en) Grease supply device
CN109890588B (en) Method and apparatus for producing foam molded body
JP2018016075A (en) Vent device and vent-type injection molding machine
CN110691680B (en) Method for producing foamed molded article and foamed molded article
JP4055742B2 (en) Method for producing oil-containing polymer molded product, and product obtained by this method
US10670074B2 (en) Method for producing semispherical shoe for swash plate compressor and injection molding die
CN109906138B (en) Method and apparatus for producing foam molded body
US20220347909A1 (en) A method for continuously manufacturing uhmwpe products
JP7033594B2 (en) Mold manufacturing method and manufacturing equipment
CN105946200A (en) Plastic extruder with vacuumizing device
JPH08309793A (en) Production of oil-containing polymer molded product
CN114889084B (en) Plastic film forming equipment
CN217943906U (en) Granule cutting mechanism of plastic granules granulator
JP7317565B2 (en) blow molding machine
JPH1053785A (en) Resin lubricating composition and its manufacturing apparatus
JP2011088332A (en) Hungry molding machine
JP2007045002A (en) Method for producing oil-containing polymer molding and molding obtained by the method
JP3981801B2 (en) Lubricating oil-containing polymer and rolling bearing
JP2004529010A (en) Manufacturing process for molded products with less burrs
JP2002188648A (en) Manufacturing method for solid lubricant filled rolling bearing
JPH0885127A (en) Production of oil-containing polymer molded product
JP2021008123A (en) Manufacturing method and manufacturing device for foam-molded products
JP2011511723A (en) Device for transporting plastic material for one batch

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20080919

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20110118

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110125

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110325

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110510

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110525

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140603

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Ref document number: 4754329

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees