JP2012020485A - Sprue bush and method of manufacturing the same - Google Patents

Sprue bush and method of manufacturing the same Download PDF

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Publication number
JP2012020485A
JP2012020485A JP2010160252A JP2010160252A JP2012020485A JP 2012020485 A JP2012020485 A JP 2012020485A JP 2010160252 A JP2010160252 A JP 2010160252A JP 2010160252 A JP2010160252 A JP 2010160252A JP 2012020485 A JP2012020485 A JP 2012020485A
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Prior art keywords
sprue
cooling water
sprue bushing
friction welding
sprue bush
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JP2012020485A5 (en
JP5576732B2 (en
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Nao Sugiura
尚 杉浦
Nobuhiro Sawa
延宏 澤
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NGK Insulators Ltd
NGK Fine Molds Ltd
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NGK Insulators Ltd
NGK Fine Molds Ltd
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Priority to JP2010160252A priority Critical patent/JP5576732B2/en
Priority to TW100124099A priority patent/TWI445608B/en
Priority to CN201110199295.6A priority patent/CN102336002B/en
Priority to KR1020110069984A priority patent/KR20120007993A/en
Publication of JP2012020485A publication Critical patent/JP2012020485A/en
Publication of JP2012020485A5 publication Critical patent/JP2012020485A5/ja
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    • 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
    • B29C45/2737—Heating or cooling means therefor
    • 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
    • B29C45/2701—Details not specific to hot or cold runner channels

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a sprue bush in which shortening of a molding cycle is attained by cooling efficiently a molten resin filled up in a sprue, and which is excellent in durability.SOLUTION: The sprue bush includes: a sprue bush body 1 having a cooling water passages 9 and 10 at the perimeter of a sprue 4 located at the center; and a flange plate 2 located in the rear side of the sprue bush body 1, and is characterized in that these members are integrally joined by friction welding. A hard metal can be used, moreover, there is no fear of water leak.

Description

本発明は、溶融樹脂を射出成形用金型のキャビティ内に注入するために用いられるスプルーブッシュとその製造方法に関するものである。   The present invention relates to a sprue bush used for injecting molten resin into a cavity of an injection mold and a method for manufacturing the sprue bush.

加熱によって溶融された樹脂を金型のキャビティ内に射出し、凝固させることによって製品を成形する射出成形法は、従来から広く用いられている。射出成形用金型は、製品部が形成されるキャビティ部のほかに、このキャビティ部に溶融樹脂を注入するためのスプルーブッシュと、スプルーブッシュの先端の射出口とキャビティ部とを連絡するランナーとを備えている。このような射出成形用金型はキャビティ部に充填された溶融樹脂が十分に固まった後に開かれ、成形品が取り出される。   2. Description of the Related Art Conventionally, an injection molding method for molding a product by injecting a resin melted by heating into a mold cavity and solidifying the resin has been widely used. In addition to the cavity part in which the product part is formed, the injection mold has a sprue bush for injecting molten resin into the cavity part, and a runner that communicates the injection port at the tip of the sprue bush and the cavity part. It has. Such an injection mold is opened after the molten resin filled in the cavity is sufficiently hardened, and the molded product is taken out.

一般的に、単位面積当たりの容積はスプルーやランナーの方がキャビティ部よりも大きい。このために製品部であるキャビティ部よりも流路であるスプルーやランナーの方が、溶融樹脂が固まるまでに必要な時間が長くなる。このため、キャビティ部の樹脂が凝固してもスプルーやランナーの樹脂が凝固するまでは金型を開くことができず、金型を開くタイミングが早すぎると未凝固の樹脂が糸を引いたり、未凝固の部分が変形したりして成形品の取り出しに問題を生ずる。このためスプルーやランナーの内部の樹脂が完全に凝固するまで金型を開くタイミングを遅らせる必要があり、その分だけ成形サイクルが長くなる。   In general, the volume per unit area is larger in the sprue or runner than in the cavity portion. For this reason, the time required for the molten resin to harden is longer in the sprue or runner that is the flow path than in the cavity portion that is the product portion. For this reason, even if the resin in the cavity is solidified, the mold cannot be opened until the sprue or runner resin is solidified, and if the mold is opened too early, the unsolidified resin may pull the thread, The unsolidified portion is deformed, causing a problem in taking out the molded product. For this reason, it is necessary to delay the timing of opening the mold until the resin inside the sprue or runner is completely solidified, and the molding cycle becomes longer accordingly.

そこで特許文献１に示されるように、冷却水路を備えたスプルーブッシュが提案されている。このスプルーブッシュによれば、溶融樹脂の射出後にスプルー内部を冷却することによってスプルー内の樹脂の凝固時間を短縮することが可能となる。しかしスプルーブッシュの内部にこのような複雑な冷却水路を機械加工法によって形成することは困難であるため、特許文献１ではレーザーを利用した粉末冶金法によって冷却水路を備えたスプルーブッシュを製造している。   Therefore, as shown in Patent Document 1, a sprue bush having a cooling water channel has been proposed. According to this sprue bushing, it is possible to shorten the solidification time of the resin in the sprue by cooling the inside of the sprue after the injection of the molten resin. However, since it is difficult to form such a complicated cooling water channel inside the sprue bush by a machining method, in Patent Document 1, a sprue bush having a cooling water channel is manufactured by a powder metallurgy method using a laser. Yes.

ところが、粉末冶金法では鋼鉄のような強度のあるスプルーブッシュを製造することは困難である。一方、スプルーブッシュは射出成形機の射出口部が押し当てられる面を有しており、粉末冶金法で成形されたスプルーブッシュは繰り返して射出成形機の射出口部が押し当てられるとその部分が次第に磨耗し、ついにはスプルーブッシュ内部の冷却水が洩れる可能性がある。このようにスプルーブッシュの外面の洩れた冷却水がランナーやキャビティの内部に入り込むと、成形品の品質劣化を招くこととなる。   However, it is difficult to produce a sprue bush having a strength like steel by powder metallurgy. On the other hand, the sprue bush has a surface against which the injection port of the injection molding machine is pressed, and the sprue bush formed by powder metallurgy is repeatedly pressed against the injection port of the injection molding machine. There is a possibility that the cooling water inside the sprue bushing leaks eventually. In this way, when cooling water leaking from the outer surface of the sprue bush enters the runner or the cavity, the quality of the molded product is deteriorated.

再公表公報ＷＯ２００８/０３８６９４Republished publication WO2008 / 038694

従って本発明の目的は上記した従来の問題点を解決し、スプルー内に充填された溶融樹脂を効率的に冷却することにより成形サイクルの短縮化が可能となり、しかも射出成形機の射出口部が繰り返し押し当てられても磨耗が生じにくい強度に優れたスプルーブッシュとその製造方法を提供することである。   Therefore, the object of the present invention is to solve the above-mentioned conventional problems, and it is possible to shorten the molding cycle by efficiently cooling the molten resin filled in the sprue. An object of the present invention is to provide a sprue bushing excellent in strength that hardly causes wear even when repeatedly pressed, and a method for manufacturing the sprue bushing.

上記の課題を解決するためになされた本発明のスプルーブッシュは、中心に位置するスプルーの周囲に冷却水路を備えたスプルーブッシュ本体と、このスプルーブッシュ本体の背面側に位置するフランジ板とを備え、これらの部材が摩擦圧接により接合一体化されたものであることを特徴とする。   The sprue bushing of the present invention made to solve the above problems includes a sprue bushing body provided with a cooling water passage around a sprue located at the center, and a flange plate located on the back side of the sprue bushing body. These members are joined and integrated by friction welding.

なお請求項２のように、スプルーブッシュ本体の先端側に、射出口を備えたノズル部が摩擦圧接により接合一体化されたものとすることができる。また請求項３のように、スプルーブッシュ本体の背面側に、隔壁が組み込まれた構造とすることができる。また請求項４のように、スプルーブッシュ本体の背面とフランジ板の前面との間に、摩擦圧接により生ずる余肉を収納する空間が形成された構造とすることができる。   As in claim 2, a nozzle portion having an injection port can be joined and integrated by friction welding on the tip side of the sprue bushing main body. Further, as in claim 3, a structure in which a partition wall is incorporated on the back side of the sprue bushing main body can be adopted. Further, as in claim 4, a structure can be provided in which a space is formed between the back surface of the sprue bushing main body and the front surface of the flange plate to store the surplus material generated by friction welding.

また上記の課題を解決するためになされた本発明のスプルーブッシュの製造方法は、冷却水路を備えたスプルーブッシュ本体の背面側に、フランジ板を摩擦圧接により接合することを特徴とするものである。なお請求項６のように、スプルーブッシュ本体の先端側に、ノズル部を摩擦圧接により接合することができる。   The sprue bushing manufacturing method of the present invention made to solve the above-mentioned problems is characterized in that a flange plate is joined to the back side of a sprue bushing body provided with a cooling water channel by friction welding. . As in claim 6, the nozzle portion can be joined to the tip side of the sprue bushing body by friction welding.

本発明によれば、スプルーブッシュ本体の背面側にフランジ板を摩擦圧接により接合するので、ステンレスや鉄鋼、銅合金などの強度の大きい金属素材を用いて、スプルーの周囲に冷却水路を備えたスプルーブッシュを製造することができる。本発明のスプルーブッシュは溶融樹脂の射出完了後に冷却水を通水することによってスプルー内部に充填された樹脂を急速に冷却することができ、糸引きやランナー部分の変形などのトラブルを回避しつつ成形サイクルを短縮化することができる。   According to the present invention, since the flange plate is joined to the back side of the sprue bushing body by friction welding, a sprue having a cooling water channel around the sprue using a high-strength metal material such as stainless steel, steel, or copper alloy. A bush can be manufactured. The sprue bushing of the present invention can rapidly cool the resin filled inside the sprue by passing cooling water after completion of the injection of the molten resin, while avoiding troubles such as stringing and deformation of the runner part. The molding cycle can be shortened.

また本発明のスプルーブッシュはステンレスや鉄鋼、銅合金などの強度の大きい金属素材で製造することができるので、射出成形機の射出口部が繰り返し押し当てられても磨耗が生じにくく、特殊溶融樹脂の成形にも使用することができる。しかも内部の冷却水が外部に洩れるおそれがないため、冷却水がランナーやキャビティの内部に入り込んで成形品の品質劣化を招くおそれもない。   In addition, since the sprue bushing of the present invention can be manufactured from a high-strength metal material such as stainless steel, steel, or copper alloy, even when the injection port of the injection molding machine is repeatedly pressed, it is difficult to wear, and a special molten resin It can also be used for molding. In addition, since there is no possibility that the internal cooling water leaks to the outside, there is no possibility that the cooling water will enter the runner or the cavity and cause deterioration of the quality of the molded product.

なお、請求項２のようにスプルーブッシュ本体の先端側に、射出口を備えたノズル部が摩擦圧接により接合一体化された構造とすれば、冷却水路の形成がより簡単となる。また請求項３のように、スプルーブッシュ本体の背面側に、隔壁が組み込まれた構造とすれば、冷却水の外部への洩れをより確実に防止することができる。また請求項４のように、スプルーブッシュ本体の背面とフランジ板の前面との間に、摩擦圧接により生ずる余肉を収納する空間が形成された構造とすれば、内側方向の余肉はこの空間内部に収納したままでよく、外表面のみを後加工すればよいので製作コストの低減を図ることができる。   In addition, if it is set as the structure where the nozzle part provided with the injection port was joined and integrated by the friction welding on the front end side of the sprue bush main body as in claim 2, the formation of the cooling water channel becomes easier. Further, as in claim 3, if a structure is provided in which a partition wall is incorporated on the back side of the sprue bushing main body, leakage of cooling water to the outside can be prevented more reliably. Further, if the space for storing the surplus material generated by the friction welding is formed between the back surface of the sprue bushing main body and the front surface of the flange plate as in the fourth aspect, the surplus material in the inner direction is this space. Since it may be stored in the interior and only the outer surface needs to be post-processed, the manufacturing cost can be reduced.

本発明のスプルーブッシュの実施形態を示す断面図である。It is sectional drawing which shows embodiment of the sprue bush of this invention. 図１のＡ-Ａ断面図である。It is AA sectional drawing of FIG. 本発明のスプルーブッシュの部品説明図である。It is component explanatory drawing of the sprue bush of this invention. 本発明のスプルーブッシュの使用状態の説明図である。It is explanatory drawing of the use condition of the sprue bush of this invention.

以下に本発明の実施形態を説明する。
図１は本発明のスプルーブッシュの実施形態を示す断面図、図２はその断面図、図３はその部品図、図４は使用状態の説明図である。以下に説明する実施形態では、各部品はステンレス、鉄鋼、銅合金などの強度に優れた金属素材からなるものである。 Embodiments of the present invention will be described below.
FIG. 1 is a cross-sectional view showing an embodiment of the sprue bushing of the present invention, FIG. 2 is a cross-sectional view thereof, FIG. 3 is a part view thereof, and FIG. In the embodiment described below, each component is made of a metal material having excellent strength, such as stainless steel, steel, and copper alloy.

先ず図１により実施形態のスプルーブッシュの構造を説明すると、１はスプルーブッシュ本体、２はその背面に摩擦圧接により一体化されているフランジ板である。またこの実施形態では、スプルーブッシュ本体１の先端にノズル部３が同じく摩擦圧接により一体に接合されている。４はこれらの中心位置に形成されたスプルーであり、スプルー４の背面側の端部は射出成形機の射出口部が押し当てられる注入口５であり、先端側は金型内へ樹脂を射出する射出口６である。溶融樹脂の流路であるスプルー４は、各部品を摩擦圧接した後に加工することが好ましい。摩擦圧接法については後述する。   First, the structure of the sprue bushing according to the embodiment will be described with reference to FIG. 1. Reference numeral 1 denotes a sprue bushing body, and 2 is a flange plate integrated on the back surface thereof by friction welding. In this embodiment, the nozzle portion 3 is also integrally joined to the tip of the sprue bushing main body 1 by friction welding. Reference numeral 4 denotes a sprue formed at these central positions. An end portion on the back side of the sprue 4 is an injection port 5 against which an injection port portion of an injection molding machine is pressed, and a tip side injects resin into the mold. This is the injection port 6 to be used. The sprue 4 that is a flow path of the molten resin is preferably processed after the respective parts are friction-welded. The friction welding method will be described later.

図１及び図３に示されるように、スプルーブッシュ本体１は円柱部７の基部に円形のフランジ部８を備えたものであり、円柱部７のスプルー４の両側位置にはスプルー４と平行に冷却水路９、１０が形成されている。これらの冷却水路９、１０の端部はフランジ部８において半径方向の溝１１、１２に達し、溝１１、１２の先端はフランジ部８の表面側に向かって直角に屈曲して冷却水注入孔１３と冷却水排出孔１４となっている。スプルーブッシュの内部にこのような折れ曲がった冷却水の流路を機械加工により形成することは困難であるが、本発明では図３に示されるように分解された部品であるスプルーブッシュ本体１に冷却水路９、１０と溝１１、１２を形成すればよいので、容易に機械加工可能である。   As shown in FIG. 1 and FIG. 3, the sprue bushing body 1 is provided with a circular flange portion 8 at the base portion of the cylindrical portion 7, and the both side positions of the sprue 4 of the cylindrical portion 7 are parallel to the sprue 4. Cooling water channels 9 and 10 are formed. The ends of the cooling water passages 9 and 10 reach the radial grooves 11 and 12 in the flange portion 8, and the tips of the grooves 11 and 12 are bent at right angles toward the surface side of the flange portion 8, thereby cooling water injection holes. 13 and a cooling water discharge hole 14. Although it is difficult to form such a bent cooling water flow path inside the sprue bush by machining, in the present invention, the sprue bushing body 1 that is a disassembled part is cooled as shown in FIG. Since the water channels 9 and 10 and the grooves 11 and 12 may be formed, machining can be easily performed.

スプルーブッシュ本体１のフランジ部８の裏面には、円柱状突起１５とその周囲を取り巻く環状凹部１６が形成されている。またフランジ板２の上面にも、円柱状突起１７とその周囲を取り巻く環状凹部１８が形成されている。本発明ではこれらのスプルーブッシュ本体１のフランジ部８と、フランジ板２とを摩擦圧接により接合して一体化するのであるが、この実施形態では図３に示される穴明きの隔壁１９が組み込まれ、溝１１、１２の裏面を覆っている。隔壁１９の外径は環状凹部１６に嵌まり込む大きさとしておく。これらの環状凹部１６と環状凹部１８とは摩擦圧接により接合して一体化されると摩擦圧接により生ずる余肉を収納する空間２１を形成することとなり、隔壁１９はその天井面を構成することとなる。なお溶融樹脂の注入口５はフランジ板２の背面に形成されている。   On the back surface of the flange portion 8 of the sprue bushing main body 1, a cylindrical protrusion 15 and an annular recess 16 surrounding the periphery thereof are formed. A cylindrical projection 17 and an annular recess 18 surrounding the periphery are also formed on the upper surface of the flange plate 2. In the present invention, the flange portion 8 of the sprue bushing main body 1 and the flange plate 2 are joined and integrated by friction welding. In this embodiment, a perforated partition wall 19 shown in FIG. 3 is incorporated. This covers the back surfaces of the grooves 11 and 12. The outer diameter of the partition wall 19 is set so as to fit into the annular recess 16. When the annular recess 16 and the annular recess 18 are joined and integrated by friction welding, a space 21 for storing surplus space generated by the friction welding is formed, and the partition wall 19 constitutes a ceiling surface thereof. Become. The molten resin inlet 5 is formed on the back surface of the flange plate 2.

またこの実施形態では、スプルーブッシュ本体１の先端側に、射出口６と冷却水路２０とを備えたノズル部３が摩擦圧接により接合一体化されている。冷却水路２０はノズル部３の端面に円形溝を形成したもので、冷却水路９、１０を先端部において相互に連通させる役割を持つものである。この冷却水路２０もノズル部３の端面を加工するだけでよいから、容易に機械加工することができる。   Moreover, in this embodiment, the nozzle part 3 provided with the injection port 6 and the cooling water channel 20 is joined and integrated on the front end side of the sprue bushing main body 1 by friction welding. The cooling water channel 20 has a circular groove formed on the end face of the nozzle portion 3 and has a role of allowing the cooling water channels 9 and 10 to communicate with each other at the tip portion. Since this cooling water channel 20 also needs only to machine the end face of the nozzle portion 3, it can be easily machined.

前記したように、本発明では摩擦圧接法によって各部品を相互に接合一体化する。摩擦圧接法は摩擦熱により部品の端面を軟化させた状態で接合対象となる他方の部品を押し付け、２部品を相互に接合する加工方法であり、それ自体は公知の技術である。通常は一方の部品を他方の部品に接触させながら回転させて摩擦熱を発生させ、組織が軟化した状態において回転を停止してアップセット加圧を加える。このため強固で水漏れのおそれのない接合が可能であるが、軟化した組織がアップセット加圧によって押し出されて余肉３０が発生することが避けられず、外周面については後工程で切削除去する必要がある。   As described above, in the present invention, the components are joined and integrated with each other by the friction welding method. The friction welding method is a processing method that presses the other part to be joined in a state where the end face of the part is softened by frictional heat and joins the two parts to each other, and is a known technique per se. Normally, one part is rotated while being in contact with the other part to generate frictional heat, and in a state where the tissue is softened, the rotation is stopped and upset pressure is applied. For this reason, it is possible to join firmly and without the risk of water leakage, but it is inevitable that the softened tissue is pushed out by upset pressurization and the surplus wall 30 is generated. There is a need to.

しかし内部に空間がある部品を摩擦圧接すると、図１に示したように内部にも余肉３０が発生することが避けられない。しかしこの実施形態のように摩擦圧接により生ずる余肉３０を収納する空間２１を形成しておけば、支障は無い。なお、各部品に予めスプルー４を形成したうえで摩擦圧接を行うと、接合面において不可避的に生ずる余肉がスプルー４を閉塞する可能性があるため、スプルー４は摩擦圧接後に加工することが好ましいことは前述の通りである。   However, when a part having a space is friction welded, it is inevitable that an extra wall 30 is generated inside as shown in FIG. However, there is no problem if the space 21 for storing the surplus space 30 generated by the friction welding is formed as in this embodiment. If friction welding is performed after the sprue 4 is formed in advance on each part, the sprue 4 may be blocked by a surplus that is inevitably generated on the joint surface. Therefore, the sprue 4 may be processed after the friction welding. Preferred is as described above.

図４は本発明のスプルーブッシュの使用状態を説明する概念的な断面図である。４０は固定側型板、４１は可動側型板である。スプルーブッシュ本体１は固定側型板４０に形成された貫通孔４２に挿入され、溶融樹脂の注入時にはスプルーブッシュ本体１のフランジ部８の表面は固定側型板４０の表面に強力に押し付けられる。固定側型板４０の内部には冷却水供給路４３と冷却水排水路４４とが形成されて表面に開口しており、フランジ部８の表面の冷却水注入孔１３と冷却水排出孔１４とがこれらに密着して連通路が形成される。冷却水供給路４３への冷却水供給タイミングは例えば電磁弁によってコントルールされる。   FIG. 4 is a conceptual cross-sectional view illustrating the usage state of the sprue bushing of the present invention. Reference numeral 40 denotes a fixed side template, and 41 denotes a movable side template. The sprue bushing main body 1 is inserted into a through-hole 42 formed in the fixed-side mold plate 40, and the surface of the flange portion 8 of the sprue bushing main body 1 is strongly pressed against the surface of the fixed-side mold plate 40 when molten resin is injected. A cooling water supply passage 43 and a cooling water drainage passage 44 are formed in the fixed side template 40 and open to the surface. The cooling water injection hole 13 and the cooling water discharge hole 14 on the surface of the flange portion 8 Are in close contact with each other to form a communication path. The cooling water supply timing to the cooling water supply path 43 is controlled by, for example, an electromagnetic valve.

図４の状態において、スプルーブッシュのフランジ板２の背面に形成された溶融樹脂の注入口５から溶融樹脂が注入され、スプルー４を通って先端の射出口６から金型のキャビティ内に充填されることは従来と同様である。しかし溶融樹脂の充填完了後に固定側型板４０の冷却水供給路４３からフランジ部８の表面に開口した冷却水注入孔１３に冷却水を供給すると、冷却水は半径方向の溝１１を経由してスプルーブッシュ本体１の冷却水路９を流れ、ノズル部３の冷却水路２０を経由してスプルーブッシュ本体１の冷却水路１０に入り、半径方向の溝１２から冷却水排出孔１４を通じて固定側型板４０の冷却水排水路４４から排水される。なおこの実施形態では隔壁１９を設けたことにより、冷却水が空間２１内に滞留することが防止される。   In the state shown in FIG. 4, molten resin is injected from a molten resin injection port 5 formed on the back surface of the flange plate 2 of the sprue bush, and is filled into the mold cavity from the injection port 6 at the tip through the sprue 4. This is the same as before. However, when the cooling water is supplied from the cooling water supply passage 43 of the fixed side mold plate 40 to the cooling water injection hole 13 opened on the surface of the flange portion 8 after the filling of the molten resin is completed, the cooling water passes through the radial grooves 11. Then, it flows through the cooling water passage 9 of the sprue bushing main body 1, enters the cooling water passage 10 of the sprue bushing main body 1 via the cooling water passage 20 of the nozzle portion 3, and passes through the cooling water discharge hole 14 from the radial groove 12 to the fixed side template. It drains from 40 cooling water drainage channels 44. In this embodiment, the provision of the partition wall 19 prevents the cooling water from staying in the space 21.

このように冷却水をスプルー４の周囲に流すことにより、スプルー４の内部に充填された溶融樹脂は迅速に固化する。このため樹脂注入後の冷却時間を従来よりも短縮しても、糸引きや変形が生じなくなり、成形品の品質も安定する。冷却のタイミングや冷却温度などは成形条件に応じて適宜設定することができる。   By flowing the cooling water around the sprue 4 in this way, the molten resin filled in the sprue 4 is rapidly solidified. For this reason, even if the cooling time after resin injection is shortened as compared with the prior art, stringing and deformation do not occur, and the quality of the molded product is stabilized. Cooling timing, cooling temperature, and the like can be appropriately set according to molding conditions.

具体的な例を示すと、ポリカＡＢＳ樹脂により小型のカバー部品を２個取りで射出成形する４０トンの成形機に本発明のスプルーブッシュを採用し、金型設定温度を７０℃として成形テストを行った。従来型のスプルーブッシュを用いた場合には、８秒の冷却時間が必要であったが、本発明のスプルーブッシュを用いてスプルーを冷却することにより、冷却時間を５秒にまで短縮することができ、４０％の短縮ができた。   As a specific example, the sprue bushing of the present invention is adopted in a 40-ton molding machine that performs injection molding by taking two small cover parts using polycarbonate ABS resin, and the molding set temperature is set to 70 ° C. went. When a conventional sprue bushing is used, a cooling time of 8 seconds is required. By cooling the sprue using the sprue bushing of the present invention, the cooling time can be shortened to 5 seconds. And 40% reduction.

また本発明のスプルーブッシュは鋼鉄などの高硬度材料で製作することが可能であるから耐久性に優れ、射出口部が繰り返し押し当てられても磨耗が生じにくいことはもちろん、ガラスを含有する溶融樹脂の射出成形に用いても磨耗することがない。   In addition, the sprue bushing of the present invention can be made of a high hardness material such as steel, so it has excellent durability, and it is difficult to cause wear even when the injection port is repeatedly pressed. Even when used for resin injection molding, it does not wear.

なお、鋼材を摩擦圧接する場合の具体的な条件の一例を示すと、次の通りである。
摩擦圧・・・６０ＭＰａ
アプセット圧・・・１２０ＭＰａ
摩擦量・・・３ｍｍ
寄り代・・・５ｍｍ
回転・・・３０００ｒｐｍ
アプセット時間・・・５ｓｅｃ An example of specific conditions when the steel material is friction welded is as follows.
Friction pressure ... 60MPa
Upset pressure: 120 MPa
Friction amount 3mm
Nearest allowance ... 5mm
Rotation: 3000rpm
Upset time: 5 sec

以上に説明したように、本発明によればスプルー内に充填された溶融樹脂を効率的に冷却することにより成形サイクルの短縮化が可能となり、しかも磨耗が生じにくい耐久性に優れたスプルーブッシュを提供することが可能となる。   As described above, according to the present invention, it is possible to shorten the molding cycle by efficiently cooling the molten resin filled in the sprue, and to improve the durability of the sprue bushing that hardly causes wear. It becomes possible to provide.

１ スプルーブッシュ本体
２ フランジ板
３ ノズル部
４ スプルー
５ 注入口
６ 射出口
７ 円柱部
８ フランジ部
９ 冷却水路
１０ 冷却水路
１１ 半径方向の溝
１２ 半径方向の溝
１３ 冷却水注入孔
１４ 冷却水排出孔
１５ 円柱状突起
１６ 環状凹部
１７ 円柱状突起
１８ 環状凹部
１９ 隔壁
２０ 冷却水路
２１ 余肉を収納する空間
３０ 余肉
４０ 固定側型板
４１ 可動側型板
４２ 貫通孔
４３ 冷却水供給路
４４ 冷却水排水路 DESCRIPTION OF SYMBOLS 1 Sprue bushing body 2 Flange plate 3 Nozzle part 4 Sprue 5 Inlet 6 Injection port 7 Cylindrical part 8 Flange part 9 Cooling water channel 10 Cooling water channel 11 Radial groove 12 Radial groove 13 Cooling water injection hole 14 Cooling water discharge hole DESCRIPTION OF SYMBOLS 15 Cylindrical protrusion 16 Annular recessed part 17 Cylindrical protrusion 18 Annular recessed part 19 Bulkhead 20 Cooling water channel 21 Space 30 which stores surplus wall Surplus wall 40 Fixed side mold plate 41 Movable side mold plate 42 Through-hole 43 Cooling water supply path 44 Cooling water Drainage channel

Claims (6)

中心に位置するスプルーの周囲に冷却水路を備えたスプルーブッシュ本体と、このスプルーブッシュ本体の背面側に位置するフランジ板とを備え、これらの部材が摩擦圧接により接合一体化されたものであることを特徴とするスプルーブッシュ。   A sprue bushing body provided with a cooling water passage around a sprue located at the center and a flange plate located on the back side of the sprue bushing body, and these members are joined and integrated by friction welding. Sprue bush characterized by スプルーブッシュ本体の先端側に、射出口を備えたノズル部が摩擦圧接により接合一体化されたものであることを特徴とする請求項１記載のスプルーブッシュ。   2. A sprue bush according to claim 1, wherein a nozzle portion having an injection port is joined and integrated by friction welding on the tip side of the sprue bushing main body. スプルーブッシュ本体の背面側に、隔壁が組み込まれていることを特徴とする請求項１記載のスプルーブッシュ。   The sprue bushing according to claim 1, wherein a partition wall is incorporated on the back side of the sprue bushing main body. スプルーブッシュ本体の背面とフランジ板の前面との間に、摩擦圧接により生ずる余肉を収納する空間が形成されていることを特徴とする請求項１記載のスプルーブッシュ。   2. A sprue bush according to claim 1, wherein a space for storing surplus material generated by friction welding is formed between the back surface of the sprue bushing main body and the front surface of the flange plate. 冷却水路を備えたスプルーブッシュ本体の背面側に、フランジ板を摩擦圧接により接合することを特徴とするスプルーブッシュの製造方法。   A method of manufacturing a sprue bush, characterized in that a flange plate is joined to the back side of a sprue bushing body provided with a cooling water channel by friction welding. スプルーブッシュ本体の先端側に、ノズル部を摩擦圧接により接合することを特徴とする請求項５記載のスプルーブッシュの製造方法。   6. The method of manufacturing a sprue bush according to claim 5, wherein the nozzle portion is joined to the front end side of the sprue bushing body by friction welding.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113478749A (en) * 2020-08-15 2021-10-08 东莞达兴塑胶模具有限公司 Method for solving wire drawing problem of large water port die

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102672893A (en) * 2012-03-16 2012-09-19 广东步步高电子工业有限公司 Filling nozzle of plastic mould and cold runner plastic mould employing the same
JP6249261B1 (en) 2016-06-29 2017-12-20 パナソニックＩｐマネジメント株式会社 Sprue bush and manufacturing method thereof
EP3479983B1 (en) * 2016-06-29 2021-08-04 Panasonic Intellectual Property Management Co., Ltd. Sprue bush and manufacturing method therefor
CN106738590B (en) * 2016-12-16 2023-01-17 浙江海峰自动化设备有限公司 Casting head jacket for PU material
CN107825667A (en) * 2017-11-27 2018-03-23 杭州先临快速成型技术有限公司 A kind of sprue bush rapid cooling water road and its design method
CN110126195A (en) * 2019-05-30 2019-08-16 开平市盈光机电科技有限公司 A kind of sprue bushing being provided with special water channel device

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0584614A (en) * 1991-07-29 1993-04-06 Isuzu Motors Ltd Manufacture of composite gear and composite gear
JPH0952259A (en) * 1995-08-11 1997-02-25 Tenshiyou Denki Kogyo Kk Manufacture of manifold of injection mold
JP2000213551A (en) * 1999-01-27 2000-08-02 Nippon Piston Ring Co Ltd End piece pressure contact type hollow camshaft
JP2004181827A (en) * 2002-12-04 2004-07-02 Akira Yusa Production method for sprue bushing in plastic mold and forging die used for the production method
JP2007283503A (en) * 2006-04-12 2007-11-01 Kanto Itami Denki Kk Sprue bush
WO2008038694A1 (en) * 2006-09-27 2008-04-03 Ngk Insulators, Ltd. Sprue bush and its production method
JP2008119938A (en) * 2006-11-13 2008-05-29 Matsushita Electric Ind Co Ltd Injection molding machine
JP3153374U (en) * 2009-06-22 2009-09-03 昌和合成株式会社 Cartridge-type sprue bush unit
WO2010082331A1 (en) * 2009-01-15 2010-07-22 株式会社Ｏｐｍラボラトリー Sprue bush and method for producing the same
JP2011218735A (en) * 2010-04-13 2011-11-04 Shin-Nihon Tech Inc Sprue bush for injection molding, and injection mold apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2712602Y (en) * 2004-05-31 2005-07-27 李岳桥 Dual-purpose pouring head cover
DE102006035927A1 (en) * 2006-07-31 2008-02-14 Drei-S-Werk Präzisionswerkzeuge GmbH & Co Fertigungs-KG Tool pin for a tool mold and method for producing such a tool pin
CN201494012U (en) * 2009-07-24 2010-06-02 上海南部塑料制品有限公司 Quick sprue bush of forming mold

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0584614A (en) * 1991-07-29 1993-04-06 Isuzu Motors Ltd Manufacture of composite gear and composite gear
JPH0952259A (en) * 1995-08-11 1997-02-25 Tenshiyou Denki Kogyo Kk Manufacture of manifold of injection mold
JP2000213551A (en) * 1999-01-27 2000-08-02 Nippon Piston Ring Co Ltd End piece pressure contact type hollow camshaft
JP2004181827A (en) * 2002-12-04 2004-07-02 Akira Yusa Production method for sprue bushing in plastic mold and forging die used for the production method
JP2007283503A (en) * 2006-04-12 2007-11-01 Kanto Itami Denki Kk Sprue bush
WO2008038694A1 (en) * 2006-09-27 2008-04-03 Ngk Insulators, Ltd. Sprue bush and its production method
JP2008119938A (en) * 2006-11-13 2008-05-29 Matsushita Electric Ind Co Ltd Injection molding machine
WO2010082331A1 (en) * 2009-01-15 2010-07-22 株式会社Ｏｐｍラボラトリー Sprue bush and method for producing the same
JP3153374U (en) * 2009-06-22 2009-09-03 昌和合成株式会社 Cartridge-type sprue bush unit
JP2011218735A (en) * 2010-04-13 2011-11-04 Shin-Nihon Tech Inc Sprue bush for injection molding, and injection mold apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113478749A (en) * 2020-08-15 2021-10-08 东莞达兴塑胶模具有限公司 Method for solving wire drawing problem of large water port die

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