JP6996217B2 - Die casting machine tip joint - Google Patents

Die casting machine tip joint Download PDF

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JP6996217B2
JP6996217B2 JP2017200703A JP2017200703A JP6996217B2 JP 6996217 B2 JP6996217 B2 JP 6996217B2 JP 2017200703 A JP2017200703 A JP 2017200703A JP 2017200703 A JP2017200703 A JP 2017200703A JP 6996217 B2 JP6996217 B2 JP 6996217B2
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joint
joint member
pressure
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JP2019072740A (en
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忠 品田
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Ube Machinery Corp Ltd
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Description

本発明は、ダイカストマシンの鋳込部品である、プランジャチップとプランジャロッドとを接続させるチップジョイントに関する。 The present invention relates to a tip joint that connects a plunger tip and a plunger rod, which are cast parts of a die casting machine.

アルミニウム等の金属を材料として、溶融状態の金属を金型に所定の速度及び圧力で射出充填させる射出装置を備えるダイカストマシンがある。ダイカストマシンにおいては、射出装置により溶融金属材料を金型内に射出充填させる際の速度（射出速度）や圧力（射出圧力／メタル圧）が、所定の条件の下で制御される。そこで、図１を参照しながら、油圧式射出装置を備える、一般的な横型ダイカストマシンを使用するアルミニウム製品の鋳造方法における射出充填を説明する。 There is a die casting machine equipped with an injection device that uses a metal such as aluminum as a material and injects and fills a molten metal into a mold at a predetermined speed and pressure. In the die casting machine, the speed (injection speed) and pressure (injection pressure / metal pressure) when the molten metal material is injected and filled in the mold by the injection device are controlled under predetermined conditions. Therefore, with reference to FIG. 1, injection filling in a method of casting an aluminum product using a general horizontal die casting machine equipped with a hydraulic injection device will be described.

横型ダイカストマシン１００は、金型装置１０１と、射出装置１０２とから構成されている。金型装置１０１には、対向する一対の固定プラテン１と可動プラテン２との間に、固定金型３と可動金型４とがそれぞれ取付けられている。固定金型３及び可動金型４は、それぞれが取り付けられた固定プラテン１及び可動プラテン２が、図示しない型開閉手段によって型閉じされることにより、その間に製品形状を含む金型キャビティ（空洞）５が形成される。また、固定プラテン１には、アルミニウム（ＡＬ）等の溶湯（高温で溶融状態）が供給（注湯）されるスリーブ６が、固定プラテン１の固定金型３側から、固定プラテン１を貫通させて突出されるように配置されている。そして、スリーブ６内は、固定金型３を貫通させて金型キャビティ５内に連通されている。 The horizontal die casting machine 100 includes a mold device 101 and an injection device 102. In the mold device 101, a fixed mold 3 and a movable mold 4 are attached between a pair of fixed platens 1 and a movable platen 2 facing each other. In the fixed mold 3 and the movable mold 4, the fixed platen 1 and the movable platen 2 to which the fixed platen 1 and the movable platen 2 are attached are closed by a mold opening / closing means (not shown), so that the mold cavity (cavity) including the product shape is included between them. 5 is formed. Further, the sleeve 6 to which the molten metal (melted state at a high temperature) such as aluminum (AL) is supplied (poured) penetrates the fixed platen 1 from the fixed mold 3 side of the fixed platen 1. It is arranged so as to be projected. The inside of the sleeve 6 penetrates the fixed mold 3 and communicates with the inside of the mold cavity 5.

次に、射出装置１０２には、本体１３と、往復運動するピストン１２とを具備する油圧式の射出シリンダ１０が設けられている。ピストン１２は、図１において右端にピストンヘッドを具備し、その左端は、射出カップリング９によってプランジャロッド８と連結され、プランジャロッド８の左端に、図示しないチップジョイントを介してプランジャチップ７が取付けられている。プランジャチップ７は、スリーブ６の突出端側からスリーブ６内に嵌合されており、射出シリンダ１０のピストン１２を前進（図１の左側）させることにより、スリーブ６内に注湯された溶湯を金型キャビティ５内に射出充填させることができる。 Next, the injection device 102 is provided with a hydraulic injection cylinder 10 including a main body 13 and a piston 12 that reciprocates. The piston 12 is provided with a piston head at the right end in FIG. 1, the left end thereof is connected to the plunger rod 8 by an injection coupling 9, and the plunger tip 7 is attached to the left end of the plunger rod 8 via a tip joint (not shown). Has been done. The plunger tip 7 is fitted in the sleeve 6 from the protruding end side of the sleeve 6, and by advancing the piston 12 of the injection cylinder 10 (on the left side in FIG. 1), the molten metal poured into the sleeve 6 is discharged. The mold cavity 5 can be injected and filled.

図１においては、射出シリンダ１０が油圧式であるので、図示せぬ油圧供給源（油圧ポンプ、蓄圧器等）より、圧油を射出シリンダ１０のヘッド室１０Ｈに供給させて、ピストン１２を前進させる。金型キャビティ５内に射出充填させた溶湯を凝固させた後、図示せぬ型開閉手段によって可動金型４を固定金型３から型開きさせて、図示しない製品取出手段等で、いずれかの金型（一般的には可動金型４側）に保持させたアルミニウム製品を金型装置１０１外へ搬送させることにより、アルミニウム製品が鋳造成形される。 In FIG. 1, since the injection cylinder 10 is a hydraulic type, pressure oil is supplied to the head chamber 10H of the injection cylinder 10 from a hydraulic supply source (hydraulic pump, accumulator, etc.) (not shown) to advance the piston 12. Let me. After solidifying the molten metal injected and filled in the mold cavity 5, the movable mold 4 is opened from the fixed mold 3 by a mold opening / closing means (not shown), and any of the products is taken out by a product taking-out means (not shown). The aluminum product is cast and molded by transporting the aluminum product held in the mold (generally the movable mold 4 side) to the outside of the mold device 101.

このような鋳造方法では、スリーブ６内に供給（注湯）された溶湯を、金型キャビティ５内に満たす（射出充填工程）までの射出速度（プランジャチップ７の前進速度）、その後（増圧工程）の射出圧力（プランジャチップ７の前方への押圧力／メタル圧）、そして、射出充填工程（速度制御）から増圧工程（圧力制御）への切換タイミングを好適に設定できるかが、良品を鋳造するために極めて重要である。一般的なアルミニウム製品の鋳造方法の、射出充填工程における射出速度と、増圧工程における射出圧力の関係とを、図２を用いて説明する。射出充填工程が開始される前の注湯工程において、図示せぬ注湯装置により溶湯がスリーブ６上面の開口部からスリーブ６内に注湯され射出開始状態となる。この時のプランジャチップ７の先端位置はＡである。（図２の上の図を参照） In such a casting method, the injection speed (advance speed of the plunger tip 7) until the molten metal supplied (pouring) in the sleeve 6 is filled in the mold cavity 5 (injection filling step), and then (pressure increasing). It is a good product whether the injection pressure (pressing pressure to the front of the plunger tip 7 / metal pressure) of the process) and the switching timing from the injection filling process (speed control) to the pressure increasing process (pressure control) can be appropriately set. Is extremely important for casting. The relationship between the injection speed in the injection filling process and the injection pressure in the pressure increasing process in a general aluminum product casting method will be described with reference to FIG. In the pouring step before the injection filling step is started, the molten metal is poured into the sleeve 6 from the opening on the upper surface of the sleeve 6 by a pouring device (not shown), and the injection is started. The tip position of the plunger tip 7 at this time is A. (See the figure above in Figure 2)

この状態から、まず低速射出工程（ＳＬ）が行われる。この工程ではプランジャチップ７を安定した低速（ＶＬ）で前進させる制御が要求される。この状態でプランジャチップ７を高速で前進させたり、速度変動を伴う不安定な状態で前進させたりすると、スリーブ６の内部において溶湯を波立たせて、溶湯内に空気が巻き込まれ、巣等の品質不良の要因となるためである。溶湯がスリーブ６内を満たし、更に、溶湯の湯面がゲート（金型キャビティ５内への溶湯流入口）近傍まで上昇するＢ位置までプランジャチップ７を前進させると、図示しない射出ストロークセンサ等によりこれを検出させて、低速射出工程から高速射出工程に切り換えさせる。（図２の上から２番目の図を参照） From this state, the low-speed injection process ( SL ) is first performed. In this step, control for advancing the plunger tip 7 at a stable low speed ( VL ) is required. If the plunger tip 7 is advanced at high speed in this state or is advanced in an unstable state accompanied by speed fluctuation, the molten metal is ruffled inside the sleeve 6 and air is entrained in the molten metal, resulting in the quality of nests and the like. This is because it causes defects. When the plunger tip 7 is advanced to the B position where the molten metal fills the inside of the sleeve 6 and the molten metal surface rises to the vicinity of the gate (the inlet of the molten metal into the mold cavity 5), an injection stroke sensor (not shown) or the like is used. This is detected and the low-speed injection process is switched to the high-speed injection process. (See the second figure from the top in Figure 2)

高速射出工程（Ｓｈ）では、プランジャチップ７の前進速度を一気に加速させ、高速（Ｖｈ）で金型キャビティ５内に溶湯を射出充填させる。これは、溶湯に対して温度が低い金型キャビティ５の表面に溶湯が接触すると急速に溶湯の凝固が進行するためであり、良品の鋳造のためには、できるだけ短時間で金型キャビティ５内への溶湯の射出充填を完了させることが望ましい。特に、アルミニウム製品が大型の場合、あるいは複雑な形状の場合、高速射出工程においてより高速での射出充填が求められる。 In the high-speed injection step (Sh), the forward speed of the plunger tip 7 is accelerated at once, and the molten metal is injected and filled in the mold cavity 5 at high speed (Vh). This is because when the molten metal comes into contact with the surface of the mold cavity 5 whose temperature is lower than that of the molten metal, the molten metal rapidly solidifies, and for casting a good product, the inside of the mold cavity 5 takes as short a time as possible. It is desirable to complete the injection filling of the molten metal into. In particular, when the aluminum product is large or has a complicated shape, injection filling at a higher speed is required in the high-speed injection process.

そして、金型キャビティ５内が溶湯で完全に満たされる直前になると、金型キャビティ５内の各部位に充填された溶湯の冷却凝固の進行に伴い、溶湯の流動性が低下し、金型キャビティ５内への溶湯の充填抵抗が急激に上昇する。そのため、射出圧力（射出シリンダ１０のヘッド室１０Ｈの圧力）が急激に上昇し、これに呼応するように射出速度が急速に低下する。そして、プランジャチップ７がＣ位置に達し、金型キャビティ５内が溶湯で完全に満たされる（ＶＰ切換位置等と呼称する）と、次の増圧工程に切り換えさせる（図２の上から３番目の図を参照）。 Immediately before the inside of the mold cavity 5 is completely filled with the molten metal, the fluidity of the molten metal decreases as the cooling and solidification of the molten metal filled in each portion in the mold cavity 5 progresses, and the mold cavity 5 is filled. The filling resistance of the molten metal into 5 increases sharply. Therefore, the injection pressure (pressure of the head chamber 10H of the injection cylinder 10) rises sharply, and the injection speed drops rapidly in response to this. Then, when the plunger tip 7 reaches the C position and the inside of the mold cavity 5 is completely filled with the molten metal (referred to as a VP switching position or the like), the plunger tip 7 is switched to the next pressure increasing step (third from the top of FIG. 2). See the figure in).

そして、増圧工程においては、予め設定される設定メタル圧（射出圧力Ｐ）を、プランジャチップ７により前方の溶湯に付与させながら押圧させ、凝固収縮に伴う溶融金属の容積減少に準じてプランジャチップ７を前進させる。 Then, in the pressure increasing step, a preset metal pressure (injection pressure P) is applied to the molten metal in front by the plunger tip 7 while being pressed, and the plunger tip is in accordance with the decrease in the volume of the molten metal due to solidification shrinkage. Move 7 forward.

ここで、この増圧工程におけるメタル圧（射出圧力）は、油圧配管に配置された圧力センサ等の圧力検出手段により、射出シリンダ１０のヘッド室１０Ｈ側に供給させる作動油圧力を検出させ、この作動油圧力と、プランジャチップの外径（断面積／製品によって異なる）とから算出される実メタル圧が設定メタル圧になるように、供給させる作動油圧力をフィードバック制御する場合がある。また、射出シリンダ１０のロッド室１０Ｒ側から排出させる作動油流量を、リアルタイムで制御することが可能な流量制御弁を備えている場合は、射出シリンダ１０のヘッド室１０Ｈ及びロッド室１０Ｒの差圧に基づき、算出される実メタル圧が設定メタル圧になるように、排出させる作動油流量をフィードバック制御する場合もある。 Here, as the metal pressure (injection pressure) in this pressure increasing step, the hydraulic oil pressure to be supplied to the head chamber 10H side of the injection cylinder 10 is detected by a pressure detecting means such as a pressure sensor arranged in the hydraulic pipe, and this The hydraulic oil pressure to be supplied may be feedback-controlled so that the actual metal pressure calculated from the hydraulic oil pressure and the outer diameter of the plunger tip (depending on the cross-sectional area / product) becomes the set metal pressure. Further, when a flow rate control valve capable of controlling the flow rate of hydraulic oil discharged from the rod chamber 10R side of the injection cylinder 10 in real time is provided, the differential pressure between the head chamber 10H and the rod chamber 10R of the injection cylinder 10 is provided. In some cases, the flow rate of hydraulic oil to be discharged is feedback-controlled so that the calculated actual metal pressure becomes the set metal pressure.

しかしながら、作動油の圧縮性や、増圧工程への移行前後の射出圧力の急激な上昇に伴う、射出シリンダ１０や油圧配管等油圧機器の体積膨張により、射出シリンダ１０のヘッド室１０Ｈ側に供給させる作動油圧力を正確に検出させることが難しく、この作動油圧力に基づいて算出される実メタル圧が、実際に溶湯に付与されているメタル圧と差違を生じるという問題がある。また、同様の理由により、算出される実メタル圧が、実際に発生しているタイミングより、タイムラグを含んで遅れて検出されるという問題がある。そのため、圧力センサ等の圧力検出手段により検出させた、射出シリンダの作動油圧力に基づいて算出される実メタル圧に基づき、設定メタル圧がフィードバック制御される場合、設定メタル圧の制御精度が低下するという問題がある。 However, it is supplied to the head chamber 10H side of the injection cylinder 10 due to the compressibility of the hydraulic oil and the volume expansion of the hydraulic equipment such as the injection cylinder 10 and the hydraulic piping due to the rapid increase in the injection pressure before and after the transition to the pressure increasing process. It is difficult to accurately detect the hydraulic pressure to be applied, and there is a problem that the actual metal pressure calculated based on this hydraulic pressure is different from the metal pressure actually applied to the molten metal. Further, for the same reason, there is a problem that the calculated actual metal pressure is detected later than the timing at which it actually occurs, including a time lag. Therefore, when the set metal pressure is feedback-controlled based on the actual metal pressure calculated based on the hydraulic oil pressure of the injection cylinder detected by the pressure detecting means such as a pressure sensor, the control accuracy of the set metal pressure is lowered. There is a problem of doing.

これら問題に対して、特許文献１には、プランジャロッドに配置させた歪検出部により、プランジャチップが溶湯へメタル圧を付与させる際の反力をプランジャロッドの歪みとして検出し、この歪みに基づいて実メタル圧を算出するという発明が開示されている。また、特許文献２は、このようなプランジャロッドの歪みに基づく実メタル圧の算出は、プランジャロッドの前進方向に作用する力のみならず、曲げ方向に作用する力も含み正確性を欠くとしている。そのため、特許文献２には、射出カップリング内に収納される、プランジャロッド後端内部に平行平板構造を構成すると共に、この平行平板構造の変形量に応じて変形せしめてプランジャチップの前進方向の力、即ち、射出圧（力）を電気信号として取り出す測定素子を組込み配設した発明が開示されている。 In response to these problems, Patent Document 1 detects the reaction force when the plunger tip applies metal pressure to the molten metal as the strain of the plunger rod by the strain detection unit arranged on the plunger rod, and is based on this strain. The invention of calculating the actual metal pressure is disclosed. Further, Patent Document 2 states that the calculation of the actual metal pressure based on the strain of the plunger rod lacks accuracy because it includes not only the force acting in the forward direction of the plunger rod but also the force acting in the bending direction. Therefore, in Patent Document 2, a parallel plate structure is formed inside the rear end of the plunger rod, which is housed in the injection coupling, and the parallel plate structure is deformed according to the amount of deformation of the parallel plate structure in the forward direction of the plunger tip. An invention is disclosed in which a measuring element for extracting a force, that is, an injection pressure (force) as an electric signal is incorporated and arranged.

特開２００６－０８２１３４号公報Japanese Unexamined Patent Publication No. 2006-082134 実開平０１－０７２９５６号公報Jikkenhei 01-07295A Gazette

このように、実メタル圧の算出に、射出シリンダの作動油圧力によらない発明が開示されているが、特許文献１の発明においては、軸芯方向に所定の長さを有するプランジャロッドの外周面の歪みを検出するため、特許文献２の指摘のとおり、プランジャロッドの前進方向に作用する力のみならず、曲げ方向に作用する力も含み正確性を欠く。一方、特許文献２の発明においては、プランジャロッドの前進方向に作用する力のみを圧力検出手段に作用させるための工夫（プランジャロッド後端内部の平行平板構造、及び、射出カップリング内への圧力検出手段の配置）が成されている。 As described above, the invention that does not depend on the hydraulic oil pressure of the injection cylinder is disclosed in the calculation of the actual metal pressure, but in the invention of Patent Document 1, the outer periphery of the plunger rod having a predetermined length in the axial core direction is disclosed. In order to detect surface strain, as pointed out in Patent Document 2, not only the force acting in the forward direction of the plunger rod but also the force acting in the bending direction is included and lacks accuracy. On the other hand, in the invention of Patent Document 2, a device for allowing only the force acting in the forward direction of the plunger rod to act on the pressure detecting means (parallel plate structure inside the rear end of the plunger rod and the pressure in the injection coupling). Arrangement of detection means) is made.

しかしながら、特許文献２の発明においては、増圧工程においてプランジャチップにより溶湯へ付与される実メタル圧（射出圧力）の反力が、プランジャチップを先頭に、チップジョイント（特許文献２に図示等無し）、プランジャロッド、そして射出シリンダのシリンダロッドというように複数の構成を介して伝播する。そのため、実メタル圧（射出圧力）の反力が直接作用するプランジャチップから、少なくとも、軸芯方向に所定の長さを有するプランジャロッドの長さ分離間した部位で、この反力を圧力検出手段により検知することになる。加えて、プランジャチップの前進方向の力のみを圧力検出手段（測定素子）に作用させるために、複数の平板を平行に積層させて構成された平行平板構造の各平板を順に後方へ変形せしめることにより、この反力を圧力検出手段（測定素子）に作用させる構成であるため、算出される実メタル圧が、実際に発生しているタイミングより、タイムラグを含んで遅れて検出されるという問題は十分に解決されていない。 However, in the invention of Patent Document 2, the reaction force of the actual metal pressure (injection pressure) applied to the molten metal by the plunger tip in the pressure increasing step is the tip joint (not shown in Patent Document 2) with the plunger tip at the head. ), The plunger rod, and the cylinder rod of the injection cylinder, etc., propagate through multiple configurations. Therefore, this reaction force is detected by the pressure detecting means at least at the portion where the reaction force of the actual metal pressure (injection pressure) acts directly from the plunger tip and the length of the plunger rod having a predetermined length in the axial core direction is separated. Will be detected by. In addition, in order to apply only the force in the forward direction of the plunger chip to the pressure detecting means (measuring element), each flat plate having a parallel plate structure composed by laminating a plurality of flat plates in parallel is sequentially deformed backward. Therefore, since this reaction force is applied to the pressure detecting means (measuring element), there is a problem that the calculated actual metal pressure is detected later than the actual timing, including a time lag. Not fully resolved.

本発明は、上記したような問題点に鑑みてなされたもので、具体的には、実メタル圧（射出圧力）の反力が直接作用するプランジャチップをプランジャロッドに接続するためのチップジョイントに、圧力検出手段を配置させる構造を提供することを目的としている。 The present invention has been made in view of the above-mentioned problems, and specifically, it is a tip joint for connecting a plunger tip to which a reaction force of an actual metal pressure (injection pressure) acts directly to a plunger rod. , It is an object of the present invention to provide a structure for arranging pressure detecting means.

本発明の上記目的は、第１受圧部と、該第１受圧部から突出し、プランジャチップが接続される第１接続部とが形成される第１ジョイント部材と、
第２受圧部と、該第２受圧部から突出し、プランジャロッドが接続される第２接続部とが形成される第２ジョイント部材と、
前記第１ジョイント部材の前記第１受圧部と、前記前記第２ジョイント部材の前記第２受圧部との間に、環状の圧力検出部材を介在させた状態で、前記第１ジョイント部材の前記第１受圧部、前記第２ジョイント部材の前記第２受圧部及び前記圧力検出部材を収納する収納部を備え、
前記収納部に、前記第１ジョイント部材の前記第１受圧部、前記第２ジョイント部材の前記第２受圧部及び前記圧力検出部材を収納すると共に、
前記第１ジョイント部材の前記第１接続部と、前記第２ジョイント部材の前記第２接続部との少なくとも一部を、前記第１接続部及び前記第２接続部のそれぞれの軸芯が同軸上になるように突出させた状態で、前記第１ジョイント部材、前記第２ジョイント部材及び前記圧力検出部材の、前記収納部内における該軸芯方向の移動を拘束する収納部材と、を備える、ダイカストマシンのチップジョイントにより達成される。
The above object of the present invention is a first joint member in which a first pressure receiving portion and a first connecting portion protruding from the first pressure receiving portion and to which a plunger tip is connected are formed.
A second joint member forming a second pressure receiving portion and a second connecting portion protruding from the second pressure receiving portion and to which a plunger rod is connected.
The first joint member of the first joint member has an annular pressure detecting member interposed between the first pressure receiving portion of the first joint member and the second pressure receiving portion of the second joint member . 1 The pressure receiving portion , the second pressure receiving portion of the second joint member , and the accommodating portion for accommodating the pressure detecting member are provided.
The first pressure receiving portion of the first joint member , the second pressure receiving portion of the second joint member, and the pressure detecting member are housed in the accommodating portion.
At least a part of the first connection portion of the first joint member and the second connection portion of the second joint member is coaxial with the axes of the first connection portion and the second connection portion. A die casting machine including a storage member that restrains the movement of the first joint member, the second joint member, and the pressure detecting member in the storage portion in the axial center direction in a state of being projected so as to be. Achieved by the tip joint of.

また、本発明に係る、ダイカストマシンのチップジョイントは、前記収納部材が、前記軸芯を通る平面によって２分割可能に構成されても良い。
Further, the tip joint of the die casting machine according to the present invention may be configured such that the storage member can be divided into two by a plane passing through the axis.

また、本発明に係る、ダイカストマシンのチップジョイントは、前記収納部材が、前記軸芯に直交する平面によって２分割可能に構成されても良い。この場合、前記収納部材の一方が、前記第１ジョイント部材及び前記第２ジョイント部材の一方と一体で形成され、
前記収納部に、前記第１ジョイント部材及び前記第２ジョイント部材の他方の受圧部と前記圧力検出部材を収納すると共に、
前記第１ジョイント部材の前記第１接続部と、前記第２ジョイント部材の前記第２接続部との少なくとも一部を、前記第１接続部及び前記第２接続部のそれぞれの軸芯が同軸上になるように突出させた状態で、前記第１ジョイント部材及び前記第２ジョイント部材の他方と、前記圧力検出部材の、前記収納部内における該軸芯方向の移動を、前記収納部材の他方により拘束するように構成されても良い。
Further, the tip joint of the die casting machine according to the present invention may be configured such that the storage member can be divided into two by a plane orthogonal to the axis. In this case, one of the storage members is integrally formed with one of the first joint member and the second joint member.
In addition to accommodating the other pressure receiving portion of the first joint member and the second joint member and the pressure detecting member in the accommodating portion,
At least a part of the first connection portion of the first joint member and the second connection portion of the second joint member is coaxial with the axes of the first connection portion and the second connection portion. The movement of the first joint member and the other of the second joint member and the pressure detecting member in the storage portion in the axial center direction is restrained by the other of the storage members in a state of being projected so as to be. It may be configured to do so.

一方、本発明に係る、ダイカストマシンのチップジョイントの前記収納部材が、前記軸芯に直交する平面によって２分割可能に構成される場合、前記収納部材の、それぞれの分割部分に対向するように形成された雌ねじ部及び雄ねじ部のねじ込み度合いにより、前記収納部の前記軸芯方向の長さを調節可能に構成されても良い。
On the other hand, when the storage member of the tip joint of the die casting machine according to the present invention is configured to be divisible by a plane orthogonal to the axis, the storage member is formed so as to face each of the divided portions. The length of the accommodating portion in the axial core direction may be adjustable depending on the degree of screwing of the female threaded portion and the male threaded portion.

更に、本発明に係る、ダイカストマシンのチップジョイントは、前記第１受圧部、前記圧力検出部及び前記第２受圧部が、前記収納部材の前記収納部に収納された状態で、前記第１接続部及び前記第２接続部のそれぞれと、前記収納部材とが、前記軸芯を中心とする相対的な回転運動を拘束される拘束部が形成されても良い。 Further, the tip joint of the die casting machine according to the present invention has the first connection in a state where the first pressure receiving portion, the pressure detecting portion and the second pressure receiving portion are housed in the storage portion of the storage member. A restraint portion may be formed in which each of the portion and the second connection portion and the storage member are constrained by a relative rotational movement about the axis.

また更に、本発明に係る、ダイカストマシンのチップジョイントは、前記圧力検出部材の受圧面に対して、少なくとも２つの圧力検出素子が、略均等に離間させて配置されても良い。 Further, in the tip joint of the die casting machine according to the present invention, at least two pressure detection elements may be arranged substantially evenly spaced from each other with respect to the pressure receiving surface of the pressure detection member.

本発明に係る、ダイカストマシンのチップジョイントは、第１受圧部と、該第１受圧部から突出し、プランジャチップが接続される第１接続部とが形成される第１ジョイント部材と、
第２受圧部と、該第２受圧部から突出し、プランジャロッドが接続される第２接続部とが形成される第２ジョイント部材と、
前記第１ジョイント部材の前記第１受圧部と、前記前記第２ジョイント部材の前記第２受圧部との間に、圧力検出部材を介在させた状態で、前記第１ジョイント部材、前記第２ジョイント部材及び前記圧力検出部材を収納する収納部を備え、
前記収納部に、前記第１ジョイント部材、前記第２ジョイント部材及び前記圧力検出部材を収納すると共に、
前記第１ジョイント部材の前記第１接続部と、前記第２ジョイント部材の前記第２接続部との少なくとも一部を、前記第１接続部及び前記第２接続部のそれぞれの軸芯が同軸上になるように突出させた状態で、前記第１ジョイント部材、前記第２ジョイント部材及び前記圧力検出部材の、前記収納部内における該軸芯方向の移動を拘束する収納部材と、を備えるため、チップジョイントに、圧力検出手段を配置させることができる。 The tip joint of the die casting machine according to the present invention includes a first joint member in which a first pressure receiving portion and a first connecting portion protruding from the first pressure receiving portion and to which a plunger tip is connected are formed.
A second joint member forming a second pressure receiving portion and a second connecting portion protruding from the second pressure receiving portion and to which a plunger rod is connected.
The first joint member and the second joint with the pressure detecting member interposed between the first pressure receiving portion of the first joint member and the second pressure receiving portion of the second joint member. A storage unit for storing the member and the pressure detecting member is provided.
The first joint member, the second joint member, and the pressure detecting member are housed in the storage portion, and the storage portion is used.
At least a part of the first connection portion of the first joint member and the second connection portion of the second joint member is coaxial with the axes of the first connection portion and the second connection portion. The tip is provided with a storage member for restraining the movement of the first joint member, the second joint member, and the pressure detecting member in the storage portion in the axial center direction in a state of being projected so as to be. A pressure detecting means can be arranged at the joint.

一般的な横型ダイカストマシンの射出装置及び金型装置を示す概略断面図（側面）である。It is schematic cross-sectional view (side surface) which shows the injection device and the mold device of a general horizontal die casting machine. 一般的な横型ダイカストマシンの射出充填工程におけるプランジャチップの位置、溶湯の状態、射出速度、射出圧力の関係を示す図及びグラフである。It is a figure and the graph which shows the relationship of the position of a plunger chip, the state of a molten metal, the injection speed, and the injection pressure in the injection filling process of a general horizontal die casting machine. ダイカストマシンの一般的なプランジャチップ、チップジョイント及びプランジャロッドの構成を示す断面図である。It is sectional drawing which shows the structure of the general plunger chip, the tip joint and the plunger rod of a die casting machine. ダイカストマシンの、第１実施形態に係る、プランジャチップ、チップジョイント及びプランジャロッドの構成を示す断面図である。It is sectional drawing which shows the structure of the plunger chip, the tip joint and the plunger rod which concerns on 1st Embodiment of a die casting machine. ダイカストマシンの、第２実施形態に係る、プランジャチップ、チップジョイント及びプランジャロッドの構成を示す断面図である。It is sectional drawing which shows the structure of the plunger chip, the tip joint and the plunger rod which concerns on 2nd Embodiment of a die casting machine. ダイカストマシンの、第３実施形態に係る、プランジャチップ、チップジョイント及びプランジャロッドの構成を示す断面図である。It is sectional drawing which shows the structure of the plunger chip, the tip joint and the plunger rod which concerns on 3rd Embodiment of a die casting machine. ダイカストマシンの、第１実施形態に係るチップジョイントに配置される圧力検出部材の概略平面図の一例である。It is an example of the schematic plan view of the pressure detecting member arranged in the tip joint which concerns on 1st Embodiment of a die casting machine. ダイカストマシンの、チップかじりを説明するための概略断面図である。It is schematic cross-sectional view for demonstrating chip galling of a die casting machine.

以下、本発明を実施するための形態について、添付図面を参照しながら詳細に説明する。なお、以下の実施形態は、各請求項に係る発明を限定するものではなく、また、実施形態の中で説明されている特徴の組み合わせの全てが発明の解決手段に必須であるとは限らない。 Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the following embodiments do not limit the invention according to each claim, and not all combinations of features described in the embodiments are essential for the means for solving the invention. ..

［第１実施形態］
第１実施形態を説明する前に、まず、ダイカストマシンの一般的なチップジョイントについて、関連する鋳込部品を含めて図３を参照しながら説明する。チップジョイント１４は、ねじ込みの際に使用する２面幅部が形成された大径部１４ａから、プランジャチップ７側に突出するように、位置決め用の第１直動部１４ｂと、プランジャチップ７の雌ねじ部に螺合する雄ねじが加工された第１雄ねじ部１４ｃが形成されている。一方、大径部１４ａから、プランジャロッド８側に突出するように、位置決め用の第２直動部１４ｄと、プランジャロッド８の雌ねじ部に螺合する雄ねじが加工された第２雄ねじ部１４ｅが形成されている。 [First Embodiment]
Before explaining the first embodiment, first, a general tip joint of a die casting machine will be described with reference to FIG. 3, including related cast parts. The tip joint 14 has a first linear motion portion 14b for positioning and a plunger tip 7 so as to project toward the plunger tip 7 from a large diameter portion 14a on which a two-sided width portion used for screwing is formed. A first male threaded portion 14c is formed by processing a male thread to be screwed into the female threaded portion. On the other hand, the second linear motion portion 14d for positioning and the second male thread portion 14e on which the male thread to be screwed into the female thread portion of the plunger rod 8 is machined so as to project from the large diameter portion 14a toward the plunger rod 8 It is formed.

チップジョイント１４の第１直動部１４ｂと第１雄ねじ部１４ｃ側に、プランジャチップ７がねじ込み固定される。そして、チップジョイント１４の第２直動部１４ｄと第２雄ねじ部１４ｅ側に、プランジャロッド８がねじ込み固定される。これらねじ込みあるいは分解のため、プランジャチップ７及びプランジャロッド８の外周にも２面幅部が形成される。 The plunger tip 7 is screwed and fixed to the first linear motion portion 14b and the first male thread portion 14c side of the tip joint 14. Then, the plunger rod 8 is screwed and fixed to the second linear motion portion 14d and the second male screw portion 14e side of the tip joint 14. Due to these screwing or disassembly, a two-sided width portion is also formed on the outer periphery of the plunger tip 7 and the plunger rod 8.

プランジャチップ７の先端面７ａは、スリーブ６内で溶湯と直接接触し高温に晒されるため、冷却水が供給される空間部７ｂが形成されている。チップジョイント１４には、中央部を貫通する冷却管路１４ｆが加工されており、プランジャロッド８にも中央部を所定位置まで貫通する冷却管路８ｆが加工されている。そのため、プランジャチップ７の空間部７ｂから、チップジョイント１４の冷却管路１４ｆ及びプランジャロッド８の冷却管路８ｆが連通した冷却管路となる。 Since the tip surface 7a of the plunger tip 7 is directly in contact with the molten metal in the sleeve 6 and exposed to a high temperature, a space portion 7b to which cooling water is supplied is formed. The tip joint 14 is machined with a cooling conduit 14f penetrating the central portion, and the plunger rod 8 is also machined with a cooling conduit 8f penetrating the central portion to a predetermined position. Therefore, the cooling pipe line 14f of the tip joint 14 and the cooling pipe line 8f of the plunger rod 8 communicate with each other from the space portion 7b of the plunger tip 7.

ここに、各冷却管路内径よりも小さい外径の水管１５を貫通配置させて、水管１５と連通するように、プランジャロッド８の外周面に加工された図示しない冷却水供給口から、水管１５を供給管路としてプランジャチップ７の空間部７ｂに冷却水を供給させる（矢印ＩＮ）。そして、水管１５と、冷却管路１４ｆ及び冷却管路８ｆとの間を排出管路として、プランジャチップ７の空間部７ｂから冷却水を排出させて、同排出管路に連通するように、プランジャロッド８の外周面に加工された図示しない冷却水排出口から冷却水を排出させる（矢印ＯＵＴ）。 Here, a water pipe 15 having an outer diameter smaller than the inner diameter of each cooling pipe is arranged through, and the water pipe 15 is processed from a cooling water supply port (not shown) processed on the outer peripheral surface of the plunger rod 8 so as to communicate with the water pipe 15. Is used as a supply pipe to supply cooling water to the space 7b of the plunger chip 7 (arrow IN). Then, the cooling water is discharged from the space 7b of the plunger chip 7 with the water pipe 15 and the cooling pipe 14f and the cooling pipe 8f as a discharge pipe so as to communicate with the discharge pipe. Cooling water is discharged from a cooling water discharge port (not shown) processed on the outer peripheral surface of the rod 8 (arrow OUT).

水管１５と、冷却管路１４ｆ及び冷却管路８ｆとの間を排出管路とするため、第１雄ねじ部１４ｃ及び第２雄ねじ部１４ｅから冷却水が漏れないよう、第１直動部１４ｂ及び第２直動部１４ｄの外周面に加工された溝部に、Ｏ（オー）リングやパッキン等のシール部材１４ｇが配置される。水管１５は、水管１５と、冷却管路１４ｆ及び冷却管路８ｆとの間の排出管路の冷却水流動の障害とならないように、チップジョイント１４の冷却管路１４ｆあるいは、プランジャロッド８の冷却管路８ｆの略中央に、公知の構成により位置保持されれば良い。 In order to make the discharge pipe line between the water pipe 15 and the cooling pipe line 14f and the cooling pipe line 8f, the first linear moving part 14b and the first linear moving part 14b so that the cooling water does not leak from the first male threaded portion 14c and the second male threaded portion 14e. A sealing member 14g such as an O-ring or packing is arranged in a groove formed on the outer peripheral surface of the second linear motion portion 14d. The water pipe 15 cools the cooling pipe 14f of the tip joint 14 or the plunger rod 8 so as not to interfere with the cooling water flow of the discharge pipe between the water pipe 15 and the cooling pipe 14f and the cooling pipe 8f. The position may be maintained at substantially the center of the pipeline 8f by a known configuration.

ダイカストマシンは、同じダイカストマシンを使用する場合でも、鋳造する鋳造品（製品）により使用する溶湯量が異なる。先に説明したように、スリーブ６の突出端側から嵌合されたプランジャチップ７で形成された空間に溶湯を供給（注湯）するため、溶湯量や好適なメタル圧に応じて、異なる内径のスリーブ６と、これに対応する外径のプランジャチップ７を使い分ける必要がある。また、鋳造サイクル毎、プランジャチップ７が摺動するスリーブ６や、スリーブ６内を摺動するプランジャチップ７は、それぞれの内周面及び外周面が摩耗するため定期的に交換する必要がある。そのため、ダイカストマシンの鋳込部品として、プランジャチップ７やプランジャロッド８は、このようなチップジョイント１４を介して接続される、交換可能な構造が一般的である。 Even when the same die casting machine is used, the amount of molten metal used differs depending on the cast product (product) to be cast. As described above, since the molten metal is supplied (poured) to the space formed by the plunger tip 7 fitted from the protruding end side of the sleeve 6, the inner diameter differs depending on the amount of the molten metal and the suitable metal pressure. It is necessary to properly use the sleeve 6 and the plunger tip 7 having an outer diameter corresponding to the sleeve 6. Further, in each casting cycle, the sleeve 6 on which the plunger tip 7 slides and the plunger tip 7 sliding in the sleeve 6 are required to be replaced regularly because their inner peripheral surfaces and outer peripheral surfaces are worn. Therefore, as cast parts of the die casting machine, the plunger tip 7 and the plunger rod 8 are generally connected via such a tip joint 14 and have an interchangeable structure.

次に、図４を参照しながら、本願第１実施形態に係る、ダイカストマシンのチップジョイント２４を説明する。図４（ａ）は、プランジャチップ７、チップジョイント２４及びプランジャロッド８の、長手方向の断面側面図である。図４（ｂ）は図４（ａ）のＡ－Ａ矢視の断面図である。チップジョイント２４は、プランジャチップ７が接続される第１ジョイント部材２６と、プランジャロッド８が接続される第２ジョイント部材２７と、第１ジョイント部材２６と第２ジョイント部材２７との間に配置される環状の圧力検出部材２８と、これらを収納する収納部２９ａを備えた収納部材２９と、が基本構成である。 Next, the tip joint 24 of the die casting machine according to the first embodiment of the present application will be described with reference to FIG. FIG. 4A is a sectional side view of the plunger tip 7, the tip joint 24, and the plunger rod 8 in the longitudinal direction. FIG. 4B is a cross-sectional view taken along the line AA of FIG. 4A. The tip joint 24 is arranged between the first joint member 26 to which the plunger tip 7 is connected, the second joint member 27 to which the plunger rod 8 is connected, and the first joint member 26 and the second joint member 27. The basic configuration is an annular pressure detecting member 28 and a storage member 29 provided with a storage unit 29a for storing the annular pressure detecting member 28.

第１ジョイント部材２６には、第１受圧部２６ａと、第１受圧部２６ａから突出し、プランジャチップ７が接続される第１接続部２６ｂとが形成される。第１実施形態においては、第１接続部２６ｂに、プランジャチップ７の雌ねじ部に螺合する雄ねじが加工されており、先に説明したチップジョイント１４と同様に、該雄ねじ加工部に連続する、位置決め用の直胴部が形成されている。このような構成により、第１ジョイント部材２６にプランジャチップ７がねじ込み固定される。 The first joint member 26 is formed with a first pressure receiving portion 26a and a first connecting portion 26b protruding from the first pressure receiving portion 26a and to which the plunger tip 7 is connected. In the first embodiment, the first connecting portion 26b is machined with a male thread to be screwed into the female threaded portion of the plunger tip 7, and is continuous with the male threaded portion in the same manner as the tip joint 14 described above. A straight body portion for positioning is formed. With such a configuration, the plunger tip 7 is screwed and fixed to the first joint member 26.

第２ジョイント部材２７には、第２受圧部２７ａと、第２受圧部２７ａから突出し、プランジャロッド８が接続される第２接続部２７ｂとが形成される。第１実施形態においては、第２接続部２７ｂに、プランジャロッド８の雌ねじ部に螺合する雄ねじが加工されており、先に説明したチップジョイント１４と同様に、該雄ねじ加工部に連続する、位置決め用の直胴部が形成されている。このような構成により、第２ジョイント部材２７にプランジャロッド８がねじ込み固定される。 The second joint member 27 is formed with a second pressure receiving portion 27a and a second connecting portion 27b protruding from the second pressure receiving portion 27a and to which the plunger rod 8 is connected. In the first embodiment, the second connecting portion 27b is machined with a male thread to be screwed into the female threaded portion of the plunger rod 8, and is continuous with the male threaded portion in the same manner as the tip joint 14 described above. A straight body portion for positioning is formed. With such a configuration, the plunger rod 8 is screwed and fixed to the second joint member 27.

収納部材２９は、収納部２９ａに、第１ジョイント部材２６の第１受圧部２６ａと、第２ジョイント部材２７の第２受圧部２７ａとの間に、圧力検出部材２８を介在させた状態で、第１ジョイント部材２６、第２ジョイント部材２７及び圧力検出部材２８を収納すると共に、第１ジョイント部材２６の第１接続部２６ｂと、第２ジョイント部材２７の第２接続部２７ｂとの少なくとも一部を、第１接続部２６ｂ及び第２接続部２７ｂのそれぞれの軸芯が同軸上になるように突出させた状態で、第１ジョイント部材２６、第２ジョイント部材２７及び圧力検出部材２８の、収納部２９ａ内における該軸芯方向の移動を拘束するように構成されている。 In the storage member 29, the pressure detection member 28 is interposed between the first pressure receiving portion 26a of the first joint member 26 and the second pressure receiving portion 27a of the second joint member 27 in the storage portion 29a. The first joint member 26, the second joint member 27, and the pressure detecting member 28 are housed, and at least a part of the first connection portion 26b of the first joint member 26 and the second connection portion 27b of the second joint member 27. The first joint member 26, the second joint member 27, and the pressure detecting member 28 are housed in a state in which the axes of the first connecting portion 26b and the second connecting portion 27b are projected so as to be coaxial with each other. It is configured to restrain the movement in the axial center direction in the portion 29a.

具体的には、第１接続部２６ｂ及び第２接続部２７ｂを、収納部材２９から突出させるための開口部の断面積を、第１受圧部２６ａ及び第２受圧部２７ａの断面積より少なくすることで、これら部材の、収納部２９ａ内における該軸芯方向の移動を拘束する。 Specifically, the cross-sectional area of the opening for projecting the first connecting portion 26b and the second connecting portion 27b from the storage member 29 is made smaller than the cross-sectional area of the first pressure receiving portion 26a and the second pressure receiving portion 27a. This restrains the movement of these members in the storage portion 29a in the axial center direction.

また、収納部材２９は、図４（ｂ）に示すように、軸芯を通る平面によって２分割可能に構成されている。通常は、複数のボルトで固定されており、圧力検出部材２８のメンテナンスや交換作業時に２分割することができる。尚、収納部材２９の収納部２９ａの軸芯方向の長さは、第１受圧部２６ａ及び第２受圧部２７ａの厚みと圧力検出部材２８の厚みとを合計した寸法と略同じ寸法にすることが、先に説明した実メタル圧の検出には好ましい。一方、これら部材を収納する場合を鑑み、軸芯方向に僅かなギャップを確保する場合は、これらを収納した後、シムプレート等のスペーサを挿入させて、これら部材の、収納部２９ａ内における該軸芯方向の移動を完全に拘束しても良い。あるいは、図示はしていないが、収納部材２９の、プランジャチップ７及びプランジャロッド８側の少なくとも一方の端面に、第１受圧部２６ａ及び第２受圧部２７ａのいずれか一方を、軸芯方向に押圧可能な、ねじ等による押圧構造を構成し、該押圧構造が配置された収納部材２９の端面側から、近傍の受圧部を押圧させて、これら部材の、収納部２９ａ内における該軸芯方向の移動を拘束しても良い。
Further, as shown in FIG. 4B, the storage member 29 is configured to be divisible by a plane passing through the axis. Normally, it is fixed with a plurality of bolts, and can be divided into two at the time of maintenance or replacement work of the pressure detecting member 28. The length of the storage portion 29a of the storage member 29 in the axial core direction shall be substantially the same as the sum of the thickness of the first pressure receiving portion 26a and the second pressure receiving portion 27a and the thickness of the pressure detecting member 28. However, it is preferable for detecting the actual metal pressure described above. On the other hand, in consideration of the case where these members are stored, when a slight gap is secured in the axial core direction, after storing these members, a spacer such as a shim plate is inserted to provide the members in the storage portion 29a. The movement in the axial direction may be completely restrained. Alternatively, although not shown, either one of the first pressure receiving portion 26a and the second pressure receiving portion 27a is placed on at least one end surface of the storage member 29 on the side of the plunger tip 7 and the plunger rod 8 in the axial core direction. A pressing structure with a screw or the like that can be pressed is formed, and a pressure receiving portion in the vicinity is pressed from the end face side of the storage member 29 in which the pressing structure is arranged, and the axial core direction of these members in the storage portion 29a. You may restrain the movement of.

ここで、第１実施形態のように、プランジャチップ７及びプランジャロッド８が、チップジョイント２４を介してねじ込み固定により接続される場合、第１受圧部２６ａ（第１ジョイント部材２６）、圧力検出部２８及び第２受圧部２７ａ（第２ジョイント部材２７）が、収納部材２９の収納部２９ａに収納された状態で、第１接続部２６ｂ及び第２接続部２７ｂのそれぞれと、収納部材２９とが、軸芯を中心とする相対的な回転運動を拘束される拘束部が形成され、ねじ込み作業が容易であることが好ましい。 Here, when the plunger tip 7 and the plunger rod 8 are connected by screwing and fixing via the tip joint 24 as in the first embodiment, the first pressure receiving portion 26a (first joint member 26) and the pressure detecting portion. With the 28 and the second pressure receiving portion 27a (second joint member 27) housed in the storage portion 29a of the storage member 29, the first connection portion 26b and the second connection portion 27b, respectively, and the storage member 29 It is preferable that a restraining portion for restraining the relative rotational movement around the shaft core is formed, and the screwing work is easy.

図４（ｂ）に示すように、第１受圧部２６ａの、軸芯方向に直交する断面形状は、基本、円形であるが、側方両端（図４（ｂ）の左右）に平行面が形成されている。２分割可能な収納部材２９の、第１受圧部２６ａの収納部位も、この第１受圧部２６ａの形状（平行面）に合わせて平行面２９ｂが加工されている。そのため、第１受圧部２６ａの平行面と、これに合わせて加工された、収納部材２９の平行面２９ｂとが、これら部材の軸芯を中心とする相対的な回転を拘束させる拘束部となる。第２受圧部２７ａについても同様に平行面が形成され、第２受圧部２７ａの収納部位も、この第２受圧部２７ａの形状に合わせて、平行面２９ｃが加工される。 As shown in FIG. 4 (b), the cross-sectional shape of the first pressure receiving portion 26a orthogonal to the axis direction is basically circular, but parallel planes are provided at both lateral ends (left and right in FIG. 4 (b)). It is formed. The storage portion of the first pressure receiving portion 26a of the storage member 29 that can be divided into two is also processed with a parallel surface 29b according to the shape (parallel surface) of the first pressure receiving portion 26a. Therefore, the parallel surface of the first pressure receiving portion 26a and the parallel surface 29b of the storage member 29 processed in accordance with the parallel surface serve as a restraining portion for restraining the relative rotation around the axis of these members. .. A parallel surface is similarly formed for the second pressure receiving portion 27a, and the parallel surface 29c is processed for the storage portion of the second pressure receiving portion 27a in accordance with the shape of the second pressure receiving portion 27a.

このように、第１接続部２６ｂ及び第２接続部２７ｂのそれぞれと、収納部材２９とが、軸芯を中心とする相対的な回転運動を拘束されることによって、収納部材２９の外周面に加工された図示しない２面幅等の回転拘束部により、チップジョイント２４の軸芯中心の回転運動を拘束させて、第１ジョイント部材２６の第１接続部２６ｂにプランジャチップ７をねじ込み固定する、あるいは、プランジャロッド８の回転運動を拘束させて、同雌ねじ部に、第２ジョイント部材２７の第２接続部２７ｂ（雄ねじ）をねじ込み固定するねじ込み作業が、一般的なチップジョイント（例えば図３のチップジョイント１４）と同様に行うことができる。 In this way, each of the first connecting portion 26b and the second connecting portion 27b and the storage member 29 are constrained by the relative rotational movement about the axis, so that the outer peripheral surface of the storage member 29 is restrained. The plunger tip 7 is screwed and fixed to the first connection portion 26b of the first joint member 26 by restraining the rotational movement of the center of the axis of the tip joint 24 by a processed rotational restraint portion having a width across flats (not shown). Alternatively, the screwing operation of restraining the rotational movement of the plunger rod 8 and screwing and fixing the second connecting portion 27b (male screw) of the second joint member 27 to the female screw portion is a general tip joint (for example, FIG. 3). It can be performed in the same manner as in the tip joint 14).

圧力検出部材２８は、第１受圧部２６ａ及び第２受圧部２７ａのいずれからの軸芯方向に作用する荷重でも検出できる圧力センサであり、図７に示すように、環状で、圧力検出部材２８の受圧面２８ａに対して、４つの圧力検出素子２８ｂ（Ａ～Ｄ）が、略均等に離間させて配置される。図７は、チップジョイント２４に配置される圧力検出部材２８の、プランジャチップ７の前端面側から見た概略平面図である。市販されている環状のロードセルで、寸法が適合するものを採用しても良いし、複数枚の環状板間に、歪みゲージや歪みセンサを内蔵して、軸芯方向に作用する荷重を検出する構成であっても良い。このような構成の圧力検出部材２８は、受圧面２８ａに作用する荷重が必ずしも均一でないため、これら複数個配置された圧力検出素子２８ｂの検出値を平均化する等の処理を行って、作用する荷重や圧力を算出するものが一般的である。 The pressure detecting member 28 is a pressure sensor that can detect a load acting in the axial direction from either the first pressure receiving portion 26a or the second pressure receiving portion 27a, and as shown in FIG. 7, it is an annular pressure detecting member 28. The four pressure detecting elements 28b (A to D) are arranged so as to be substantially evenly spaced from each other with respect to the pressure receiving surface 28a. FIG. 7 is a schematic plan view of the pressure detecting member 28 arranged on the tip joint 24 as viewed from the front end surface side of the plunger tip 7. Commercially available annular load cells that match the dimensions may be used, or a strain gauge or strain sensor is built in between multiple annular plates to detect the load acting in the axial direction. It may be configured. Since the load acting on the pressure receiving surface 28a is not always uniform, the pressure detecting member 28 having such a configuration acts by performing processing such as averaging the detection values of the plurality of pressure detecting elements 28b arranged. Generally, the load and pressure are calculated.

また、第１受圧部２６ａ、第２受圧部２７ａ及び圧力検出部材２８の、収納部２９ａ内における該軸芯方向の移動が拘束されるため、圧力検出部材２８には、チップジョイント２４として一体化した状態において、軸芯方向の荷重が作用する。実際の実メタル圧の反力検出に際しては、予め、この状態で軸芯方向に作用する荷重を補正（制御上相殺する）した方が、より圧力検出精度が向上することは言うまでもない。 Further, since the movement of the first pressure receiving portion 26a, the second pressure receiving portion 27a and the pressure detecting member 28 in the axial core direction in the accommodating portion 29a is restricted, the pressure detecting member 28 is integrated as a tip joint 24. In this state, the load in the axial direction acts. Needless to say, when the reaction force of the actual metal pressure is detected, the pressure detection accuracy is further improved by correcting (cancelling out in terms of control) the load acting in the axial direction in this state in advance.

引き続き、第１実施形態における、プランジャチップ２４の冷却管路について説明する。チップジョイント２４の第１ジョイント部材２６及び第２ジョイント部材２７には、それぞれの軸芯を貫通する貫通孔２６ｃ及び貫通孔２７ｃが形成される。これら貫通孔２６ｃ、２７ｃの内径は、同じあるいは近い直径のプランジャチップ７のチップジョイント１４（図３）の冷却管路１４ｆと同程度であれば良い。ここで、第１ジョイント部材２６及び第２ジョイント部材２７間に配置される圧力検出部材２８が環状であり、且つ、その内径がこれら貫通孔２６ｃ、２７ｃの内径以上であるので、プランジャチップ７の空間部７ｂから、チップジョイント２４を貫通して、プランジャロッド８の冷却管路８ｆに連通する貫通孔が形成される。そして、プランジャチップ７の空間部７ｂに到達するように、この貫通孔に大径水管２５ａが挿入される。この大径水管２５ａが挿入される貫通孔２６ｃ及び貫通孔２７ｃの内周面には溝部が加工され、冷却水が漏れないよう、Ｏ（オー）リングやパッキン等のシール部材２４ｇが複数個所に配置される。 Subsequently, the cooling pipeline of the plunger tip 24 in the first embodiment will be described. Through holes 26c and through holes 27c that penetrate the respective shaft cores are formed in the first joint member 26 and the second joint member 27 of the tip joint 24. The inner diameters of the through holes 26c and 27c may be about the same as the cooling conduit 14f of the tip joint 14 (FIG. 3) of the plunger tip 7 having the same or similar diameter. Here, since the pressure detecting member 28 arranged between the first joint member 26 and the second joint member 27 is annular and the inner diameter thereof is equal to or larger than the inner diameters of the through holes 26c and 27c, the plunger tip 7 is used. From the space portion 7b, a through hole is formed that penetrates the tip joint 24 and communicates with the cooling conduit 8f of the plunger rod 8. Then, the large-diameter water pipe 25a is inserted into the through hole so as to reach the space portion 7b of the plunger tip 7. Grooves are formed on the inner peripheral surfaces of the through hole 26c and the through hole 27c into which the large-diameter water pipe 25a is inserted, and 24 g of sealing members such as O-rings and packings are placed in a plurality of places so that cooling water does not leak. Be placed.

また、大径水管２５ａ内に小径水管２５ｂを貫通配置させて、小径水管２５ｂと連通するように、プランジャロッド８の外周面に加工された図示しない冷却水供給口から、小径水管２５ｂを供給管路としてプランジャチップ７の空間部７ｂに冷却水を供給させる（矢印ＩＮ）。そして、小径水管２５ｂと大径水管２５ａとの間を排出管路として、プランジャチップ７の空間部７ｂから冷却水を排出させて、同排出管路に連通するように、プランジャロッド８の外周面に加工された図示しない冷却水排出口から冷却水を排出させる（矢印ＯＵＴ）。 Further, the small-diameter water pipe 25b is supplied from a cooling water supply port (not shown) processed on the outer peripheral surface of the plunger rod 8 so as to penetrate the small-diameter water pipe 25b in the large-diameter water pipe 25a and communicate with the small-diameter water pipe 25b. Cooling water is supplied to the space 7b of the plunger chip 7 as a path (arrow IN). Then, the outer peripheral surface of the plunger rod 8 is discharged so that the cooling water is discharged from the space 7b of the plunger tip 7 and communicates with the discharge pipe so that the space between the small diameter water pipe 25b and the large diameter water pipe 25a is used as a discharge pipe. Cooling water is discharged from a cooling water discharge port (not shown) processed in (arrow OUT).

シール部材２４ｇが、少なくとも、第１ジョイント部材２６の、プランジャチップ７の空間部７ｂ近傍と圧力検出部材２８近傍との２個所に配置されることで、空間部７ｂから排出される冷却水が収納部２９ａ内の圧力検出部材２８に到達することを防止できる。また、第１ジョイント部材２６の第１接続部２６ｂ（ねじ加工部）からの冷却水の漏洩を防止するために、シール部材２４ｇを、第１ジョイント部材２６の直胴部外周面に配置させることが好ましい。一方、第２ジョイント部材２７には、このようなシール部材２４ｇの配置は必須ではない。しかしながら、プランジャチップ７及びプランジャロッド８の雌ねじ部仕様（ねじサイズ及び深さ等）が同じ場合、第１ジョイント部材２６及び第２ジョイント部材２７を共通部材として、第２ジョイント部材２７にもシール部材２４ｇを配置させても良い。 By arranging the seal member 24g at least in two places of the first joint member 26, in the vicinity of the space portion 7b of the plunger chip 7 and in the vicinity of the pressure detection member 28, the cooling water discharged from the space portion 7b is stored. It is possible to prevent the pressure detecting member 28 in the portion 29a from being reached. Further, in order to prevent leakage of cooling water from the first connection portion 26b (threaded portion) of the first joint member 26, the seal member 24g is arranged on the outer peripheral surface of the straight body portion of the first joint member 26. Is preferable. On the other hand, the arrangement of such a sealing member 24g is not essential for the second joint member 27. However, when the female screw portion specifications (thread size, depth, etc.) of the plunger tip 7 and the plunger rod 8 are the same, the first joint member 26 and the second joint member 27 are used as a common member, and the second joint member 27 is also a seal member. 24 g may be arranged.

尚、小径水管２５ｂは、小径水管２５ｂ大径水管２５ａ間の排出管路の冷却水流動の障害とならないように、大径水管２５ａ内、あるいは、プランジャロッド８の冷却管路８ｆの略中央に、図示しない公知の構成により位置保持されれば良い。 The small-diameter water pipe 25b is located in the large-diameter water pipe 25a or substantially in the center of the cooling pipe 8f of the plunger rod 8 so as not to interfere with the cooling water flow of the discharge pipe between the small-diameter water pipe 25b and the large-diameter water pipe 25a. , The position may be maintained by a known configuration (not shown).

このような第１実施形態のチップジョイント２４には、軸芯方向の移動が拘束された状態で圧力検出部材２８が配置されており、該圧力検出部材２８には、実メタル圧（射出圧力）の反力が直接作用するプランジャチップ７の直近で、第１ジョイント部材２６のみを介して該反力が作用する。（第２ジョイント部材２７は、プランジャロッド８にねじ込み固定されており、該反力の前進方向の成分が後方（プランジャロッド８側）に逃げる余地はない。）そのため、特許文献１の発明に対して、圧力検出部材２８が検出する反力に、構成部材の曲げ方向に作用する力（ベクトル）がほとんど含まれない。また、特許文献１や特許文献２の発明に対して、実メタル圧（射出圧力）の反力が直接作用するプランジャチップ７の直近で、第１ジョイント部材２６のみを介して作用する該反力を検出する。そのため、実メタル圧が、実際に発生しているタイミングより、タイムラグを含んで遅れて検出される要素が少ない。これら特徴により、実メタル圧（射出圧力）の大きさや発生タイミングを正確に検出することができる。これにより、実メタル圧に基づき制御される各種制御項目、例えば、増圧工程における設定増圧力や、射出充填工程から増圧工程への切換点（ＶＰ切換点／速度・圧力制御切換点）の制御精度を向上させることができる。 In such a tip joint 24 of the first embodiment, a pressure detecting member 28 is arranged in a state where the movement in the axial center direction is restrained, and the actual metal pressure (injection pressure) is arranged on the pressure detecting member 28. In the immediate vicinity of the plunger tip 7 on which the reaction force of the above acts directly, the reaction force acts only through the first joint member 26. (The second joint member 27 is screwed and fixed to the plunger rod 8, and there is no room for the component of the reaction force in the forward direction to escape to the rear (plunger rod 8 side).) Therefore, with respect to the invention of Patent Document 1. Therefore, the reaction force detected by the pressure detecting member 28 includes almost no force (vector) acting in the bending direction of the constituent member. Further, the reaction force acting only on the first joint member 26 in the immediate vicinity of the plunger tip 7 on which the reaction force of the actual metal pressure (injection pressure) directly acts on the inventions of Patent Document 1 and Patent Document 2. Is detected. Therefore, there are few elements in which the actual metal pressure is detected later than the timing at which it actually occurs, including a time lag. With these features, it is possible to accurately detect the magnitude and generation timing of the actual metal pressure (injection pressure). As a result, various control items controlled based on the actual metal pressure, for example, the set pressure increase in the pressure increase process and the switching point from the injection filling process to the pressure increase process (VP switching point / speed / pressure control switching point). The control accuracy can be improved.

また、実メタル圧（射出圧力）の反力だけではなく、プランジャチップ７がスリーブ６内を前進する際に、プランジャチップ７に作用する前進抵抗力も正確に検出することができる。これにより、射出充填工程におけるプランジャチップ７の前進抵抗力をモニタリングして、極端な変動があった場合に、チップかじりの発生やスリーブ内潤滑不良の発生とみなす制御や、前進抵抗力の継続的な変化により、プランジャチップ７やスリーブ６の交換時期を判断する制御にも活用できる。 Further, not only the reaction force of the actual metal pressure (injection pressure) but also the forward resistance force acting on the plunger tip 7 when the plunger tip 7 advances in the sleeve 6 can be accurately detected. As a result, the forward resistance of the plunger tip 7 in the injection filling process is monitored, and when there is an extreme fluctuation, control is performed to regard the occurrence of tip galling or poor lubrication in the sleeve, and the forward resistance is continuous. It can also be used for control to determine the replacement time of the plunger tip 7 and the sleeve 6 due to such changes.

ここで、チップかじりとは、高温のアルミ溶湯がスリーブ６に供給（注湯）されることに起因して発生するスリーブ６の湾曲変形や、スリーブ６内周面とプランジャチップ７外周面との間に、アルミ溶湯等の凝固片等が特定の部位に噛み込まれることにより、あるいは、これが繰り返されることにより、凝固片等が噛み込まれたスリーブ６の内周面やプランジャチップ７の外周面の特定の部位の面相度が悪化して、プランジャチップ７の前進抵抗力が、プランジャチップ７の外周面の該特定の部位で増大する現象である。 Here, the tip galling is the bending deformation of the sleeve 6 caused by the high temperature molten aluminum being supplied (pouring) to the sleeve 6, and the inner peripheral surface of the sleeve 6 and the outer peripheral surface of the plunger tip 7. In the meantime, a solidified piece such as molten aluminum is bitten into a specific part, or by repeating this, the inner peripheral surface of the sleeve 6 or the outer peripheral surface of the plunger tip 7 in which the solidified piece or the like is bitten. This is a phenomenon in which the surface phase of a specific portion of the plunger tip 7 deteriorates and the forward resistance of the plunger tip 7 increases at the specific portion on the outer peripheral surface of the plunger tip 7.

前者のスリーブ６の湾曲変形は、アルミ溶湯が直接接触するスリーブ６の下方内周面が、アルミ溶湯が直接接触しないスリーブ６の上方内周面よりも軸芯方向に長く熱膨張するため、概略側面断面図である図８（ａ）に示すように、スリーブ６のプランジャチップ７側端部が上方へバナナのように湾曲変形する現象である。図８（ａ）の２点鎖線でスリーブ６の湾曲変形を誇張して図示している。そのため、プランジャチップ７の外周面上方に対して、外周面下方がスリーブ６の下方内周面とより強く接触し、プランジャチップ７の前進抵抗力に上下方向で差違が生じる。その結果、プランジャチップ７の前進方向（軸芯方向）に直交する、プランジャチップ７を貫通する水平軸Ｈ回りに、プランジャチップ７の前端面を下方に向ける回転モーメントＭｈが発生し、プランジャチップ７後方端面も２点鎖線で示すように傾く。その結果、図７に示す圧力検出部材２８の受圧面２８ａに作用する荷重も上下方向で明確な差違が生じ、上方の圧力検出素子２８ａのＡが検出する荷重より、下方のＣが検出する荷重の方が大きくなる。また、スリーブ６の湾曲変形の状態や、スリーブ６及びプランジャチップ７の相対関係により、この回転モーメントＭｈが、プランジャチップ７の前端面を上方に向けるように作用する場合もある。 The former bending deformation of the sleeve 6 is roughly because the lower inner peripheral surface of the sleeve 6 with which the molten aluminum contact directly expands longer in the axial core direction than the upper inner peripheral surface of the sleeve 6 with which the molten aluminum contact does not come into direct contact. As shown in FIG. 8A, which is a side sectional view, this is a phenomenon in which the end portion of the sleeve 6 on the side of the plunger tip 7 is curved and deformed upward like a banana. The two-dot chain line in FIG. 8A exaggerates the bending deformation of the sleeve 6. Therefore, the lower part of the outer peripheral surface is in stronger contact with the lower inner peripheral surface of the sleeve 6 with respect to the upper part of the outer peripheral surface of the plunger tip 7, and the forward resistance of the plunger tip 7 is different in the vertical direction. As a result, a rotational moment Mh that directs the front end surface of the plunger tip 7 downward is generated around the horizontal axis H that penetrates the plunger tip 7 and is orthogonal to the forward direction (axis direction) of the plunger tip 7. The rear end face is also tilted as shown by the two-dot chain line. As a result, the load acting on the pressure receiving surface 28a of the pressure detecting member 28 shown in FIG. 7 also has a clear difference in the vertical direction, and the load detected by C below the load detected by A of the pressure detecting element 28a above. Is larger. Further, depending on the state of bending deformation of the sleeve 6 and the relative relationship between the sleeve 6 and the plunger tip 7, this rotational moment Mh may act so as to direct the front end surface of the plunger tip 7 upward.

一方、後者の、凝固片等が特定の部位に噛み込まれる場合は、該特定の部位により、プランジャチップ７に作用する回転モーメントの回転方向が異なる。例えば、概略平面断面図である図８（ｂ）に示すように、凝固片等Ｇが、プランジャチップ７の前端面側の、該前端面側からみて外周面右側に噛み込まれた場合、その部位を支点にして、プランジャチップ７の前端面を、該前端面側からみて右側に向ける回転モーメントＭｈ’が発生する。その結果、図７に示す、左側の圧力検出素子２８ａのＤが検出する荷重より、右側のＢが検出する荷重の方が大きくなる。 On the other hand, when the latter, such as a solidified piece, is bitten into a specific portion, the rotation direction of the rotational moment acting on the plunger tip 7 differs depending on the specific portion. For example, as shown in FIG. 8B, which is a schematic plan sectional view, when the solidified piece or the like G is bitten on the right side of the outer peripheral surface of the plunger tip 7 on the front end surface side when viewed from the front end surface side. A rotational moment Mh'is generated in which the front end surface of the plunger tip 7 is directed to the right side when viewed from the front end surface side with the portion as a fulcrum. As a result, the load detected by B on the right side is larger than the load detected by D of the pressure detection element 28a on the left side shown in FIG. 7.

このように、チップかじりは、その要因により、圧力検出部材２８の受圧面２８ａに作用する荷重の不均一がある程度特定可能である。そのため、図７に示すように、圧力検出部材２８の受圧面２８ａに対して、４つの圧力検出素子２８ａが、略均等に離間させて配置される場合、個々の圧力検出素子２８ｂの検出値を比較することにより、後者の、凝固片等が特定の部位に噛み込まれる場合であっても、該特定の部位の推定が可能である。一方、前者のスリーブ６の湾曲変形に起因するチップかじりのみを検出できれば良い場合は、図７に示す、圧力検出部材２８の４つの圧力検出素子２８ａの内、少なくとも上下方向のＡ及びＣの２つが配置されれば目的を達することができる。尚、上記回転モーメントＭｈ及びＭｈ’が、先に説明した、構成部材の曲げ方向に作用する力（ベクトル）とは異なるものであることは言うまでもない。 As described above, in the chip galling, the non-uniformity of the load acting on the pressure receiving surface 28a of the pressure detecting member 28 can be specified to some extent due to the factor. Therefore, as shown in FIG. 7, when the four pressure detection elements 28a are arranged substantially evenly spaced from each other with respect to the pressure receiving surface 28a of the pressure detection member 28, the detection values of the individual pressure detection elements 28b are determined. By comparison, even when the latter, such as a coagulated piece, is bitten into a specific site, it is possible to estimate the specific site. On the other hand, when it is sufficient to detect only the tip galling caused by the bending deformation of the sleeve 6, at least 2 of A and C in the vertical direction among the four pressure detecting elements 28a of the pressure detecting member 28 shown in FIG. If one is placed, the purpose can be achieved. Needless to say, the rotational moments Mh and Mh'are different from the forces (vectors) acting in the bending direction of the constituent members described above.

先に、第１受圧部２６ａ、第２受圧部２７ａ及び圧力検出部材２８の、収納部２９ａ内における該軸芯方向の移動が拘束されるため、圧力検出部材２８には、チップジョイント２４として一体化した状態において、軸芯方向に作用する荷重を補正（制御上相殺する）することを説明したが、上記のような様々な状態において、プランジャチップ７に作用する抵抗力を正確に検出するために、試運転時等、プランジャチップ７を、無負荷で、機械的にスリーブ６内で前進・後退させる際の純機械的な抵抗力をモニタリングして、この抵抗力も補正（制御上相殺する）することが好ましい。 First, since the movement of the first pressure receiving portion 26a, the second pressure receiving portion 27a, and the pressure detecting member 28 in the axial core direction in the accommodating portion 29a is restricted, the pressure detecting member 28 is integrated as a tip joint 24. It has been explained that the load acting in the axial direction is corrected (cancelled out in terms of control) in the changed state, but in order to accurately detect the resistance force acting on the plunger chip 7 in various states as described above. In addition, the pure mechanical resistance when the plunger tip 7 is mechanically moved forward and backward in the sleeve 6 with no load, such as during a test run, is monitored, and this resistance is also corrected (cancelled out in terms of control). Is preferable.

尚、一体構造の一般的なチップジョイント１４に対して、本願第１実施形態のチップジョイント２４は、圧力検出部材を除き、第１ジョイント部材２６、第２ジョイント部材２７及び収納部材２９の３構成、すなわち、複数の構成を一体化している。チップジョイントに最も大きな力が作用するのは、増圧工程であり、その方向はプランジャチップの前進方向である。したがって、複数の構成を一体化する収納部材２９に、この前進方向に作用する力に抗する必要はなく、軸芯の維持に必要な強度を備えていれば良い。また、射出完了後、プランジャチップ７をスリーブ６内で後退させる際の、プランジャチップ７の後退抵抗力に抗するのに必要な強度を備えていれば良い。そのため、構造の分割化によるチップジョイントの強度はこれらに準じた強度が確保されれば良い。 In contrast to the general tip joint 14 having an integrated structure, the tip joint 24 of the first embodiment of the present application has three configurations of the first joint member 26, the second joint member 27, and the storage member 29, except for the pressure detecting member. That is, a plurality of configurations are integrated. The greatest force acts on the tip joint in the pressure boosting process, which is the forward direction of the plunger tip. Therefore, it is not necessary for the storage member 29 that integrates the plurality of configurations to resist the force acting in the forward direction, and it is sufficient that the storage member 29 has the strength necessary for maintaining the axis. Further, it suffices to have the strength necessary to withstand the retracting resistance of the plunger tip 7 when the plunger tip 7 is retracted in the sleeve 6 after the injection is completed. Therefore, the strength of the tip joint due to the division of the structure should be as strong as these.

更に、本願第１実施形態のチップジョイント２４は、第１ジョイント部材２６の第１接続部２６ｂ（ねじ加工部）や冷却管路の仕様を一般的なチップジョイント１４のプランジャチップ７側と同仕様にできれば、既存のプランジャチップ７をそのまま使用できる。また、チップジョイント２４の全長をチップジョイント１４の全長に合わせ、第２ジョイント部材２７の第２接続部２７ｂ（ねじ加工部）や冷却管路の仕様をプランジャロッド８側と同仕様にできれば、既存のプランジャロッド８をそのまま使用できる。プランジャチップ７やプランジャロッド８は、ダイカストマシンで鋳造製品を製造するメーカー等において、鋳込部品（消耗／要交換部品）として、費用管理や在庫管理を行う部材であるため、チップジョイント７のみの交換、あるいは、交換頻度が低いプランジャロッド８の交換で本願第１実施形態のチップジョイント２４が採用可能であれば、導入コストを抑えることができる。 Further, the tip joint 24 of the first embodiment of the present application has the same specifications as the plunger tip 7 side of the general tip joint 14 in the specifications of the first connection portion 26b (threaded portion) of the first joint member 26 and the cooling pipeline. If possible, the existing plunger chip 7 can be used as it is. Further, if the total length of the tip joint 24 can be matched with the total length of the tip joint 14, and the specifications of the second connection portion 27b (threaded portion) of the second joint member 27 and the cooling pipeline can be made the same as those of the plunger rod 8 side, the existing specifications can be obtained. Plunger rod 8 can be used as it is. Since the plunger tip 7 and the plunger rod 8 are members that manage costs and inventory as cast parts (consumable / replacement parts) in a manufacturer that manufactures casting products with a die casting machine, only the tip joint 7 is used. If the tip joint 24 of the first embodiment of the present application can be adopted by replacement or replacement of the plunger rod 8 having a low replacement frequency, the introduction cost can be suppressed.

仮に、本願第１実施形態のチップジョイント２４の採用により、プランジャロッド８の交換も必要になる場合、本願第１実施形態のチップジョイント２４及び、これが採用可能な新規のプランジャロッド８を、スリーブや金型の交換後、あるいは、新規金型導入時の、正確な実メタル圧の検出（データ取り）のためだけに使用して、このデータに基づき、従来のチップジョイント及びプランジャロッドを使用する実鋳造の制御を補正することも可能である。 If it is necessary to replace the plunger rod 8 due to the adoption of the tip joint 24 of the first embodiment of the present application, the tip joint 24 of the first embodiment of the present application and the new plunger rod 8 to which this can be adopted can be used as a sleeve. It is used only for accurate detection of actual metal pressure (data acquisition) after replacing the mold or when introducing a new mold, and based on this data, the conventional tip joint and plunger rod are used. It is also possible to correct the control of casting.

［第２実施形態］
次に、第２実施形態に係る、ダイカストマシンのチップジョイント３４について、図５を参照しながら説明する。図５は、プランジャチップ７、チップジョイント３４及びプランジャロッド８の、長手方向の断面側面図である。第２実施形態のチップジョイント３４が、第１実施形態のチップジョイント２４と相違する点は、収納部材が、軸芯方向に直交する平面上で２分割可能に構成される点と、収納部材の、それぞれの分割部分に対向するように形成された雌ねじ部及び雄ねじ部のねじ込み度合いにより、収納部の軸芯方向の長さを調節可能に構成される点である。したがって、第１実施形態と異なる点のみ説明し、それ以外の点については、同じ構成については、第１実施形態と同じ符号を使用すると共に、重複する説明は割愛する。 [Second Embodiment]
Next, the tip joint 34 of the die casting machine according to the second embodiment will be described with reference to FIG. FIG. 5 is a sectional side view of the plunger tip 7, the tip joint 34, and the plunger rod 8 in the longitudinal direction. The difference between the tip joint 34 of the second embodiment and the tip joint 24 of the first embodiment is that the storage member can be divided into two on a plane orthogonal to the axis direction, and the storage member The point is that the length of the accommodating portion in the axial core direction can be adjusted by the degree of screwing of the female threaded portion and the male threaded portion formed so as to face each of the divided portions. Therefore, only the points different from those of the first embodiment will be described, and with respect to other points, the same reference numerals as those of the first embodiment will be used for the same configuration, and duplicate explanations will be omitted.

図５に示すように、収納部材３９は、軸芯に直交する平面によって２分割可能に構成されており、また、それぞれの分割部分に対向するように、雄ねじ部及び雌ねじ部が形成されている。具体的には、第１ジョイント部材２６側の前方収納部材３９ａの後方（プランジャロッド８側）には、軸芯方向に雌ねじ部３９ｂが形成されている。そして、第２ジョイント部材２７側の後方収納部材３９ｃの前方（プランジャチップ７側）には、前方収納部材３９ａの雌ねじ部３９ｂに螺合する雄ねじ部３９ｄが形成されている。また、前方収納部材３９ａ及び後方収納部材３９ｃの外周面には、互いをねじ込み可能にする、図示しない２面幅等の回転拘束部が形成されている。前方収納部材３９ａの雌ねじ部３９ｂと後方収納部材３９ｃの雄ねじ部３９ｄはそれぞれ逆に形成されても良い。

As shown in FIG. 5, the storage member 39 is configured to be split into two by a plane orthogonal to the axis, and a male screw portion and a female screw portion are formed so as to face each of the divided portions. .. Specifically, a female screw portion 39b is formed in the axial direction behind the front storage member 39a on the first joint member 26 side (plunger rod 8 side). A male screw portion 39d screwed to the female screw portion 39b of the front storage member 39a is formed in front of the rear storage member 39c on the second joint member 27 side (plunger tip 7 side). Further, on the outer peripheral surfaces of the front storage member 39a and the rear storage member 39c, rotation restraint portions having a width across flats (not shown) are formed so that they can be screwed into each other. The female threaded portion 39b of the front accommodating member 39a and the male threaded portion 39d of the rear accommodating member 39c may be formed in reverse.

ここで、前方収納部材３９ａ及び後方収納部材３９ｃをねじ込んで形成される収納部２９ａは、双方をねじ込むねじ込み度合いにより、軸芯方向の長さを調整可能である。すなわち、収納部２９ａに、第１ジョイント部材２６、第２ジョイント部材２７及び圧力検出部材２８を収納した状態で、その長さを調整し、第１受圧部２６ａ及び第２受圧部２７ａの厚みと圧力検出部材２８の厚みとを合計した寸法と略同じ寸法にすることが可能であり、また、この状態で、それぞれの収納部材のねじ込み代が残るように構成される。これにより、第１実施形態のように、シムプレートや押圧構造による軸芯方向のギャップの補正（解消）を必要とせず、これら部材の、収納部２９ａ内における該軸芯方向の移動の拘束が可能である。また、ねじ込み度合いを増して、圧力検出部材２８に、確実に初期荷重を付与させることが好ましい。この初期荷重により、先に説明した、軸芯方向に作用する荷重の補正（制御上相殺する）と相まって、よりプランジャチップ７の軸芯方向に作用する荷重の検出精度を向上させることができる。 Here, the storage portion 29a formed by screwing the front storage member 39a and the rear storage member 39c can adjust the length in the axial core direction depending on the degree of screwing in both of them. That is, with the first joint member 26, the second joint member 27, and the pressure detecting member 28 housed in the storage portion 29a, the length thereof is adjusted to match the thickness of the first pressure receiving portion 26a and the second pressure receiving portion 27a. It is possible to make the dimension substantially the same as the total dimension of the thickness of the pressure detecting member 28, and in this state, the screwing allowance of each accommodating member is configured to remain. As a result, unlike the first embodiment, it is not necessary to correct (eliminate) the gap in the axial center direction by the shim plate or the pressing structure, and the movement of these members in the axial core direction in the storage portion 29a is restricted. It is possible. Further, it is preferable to increase the screwing degree to surely apply the initial load to the pressure detecting member 28. This initial load, combined with the correction of the load acting in the axis direction (which cancels out in terms of control) described above, can further improve the detection accuracy of the load acting in the axis direction of the plunger tip 7.

尚、図示はしていないが、第１実施形態と同様に、第１ジョイント部材２６の第１接続部２６ｂと前方収納部材３９ａとが、軸芯を中心とする相対的な回転運動を拘束される拘束部が形成され、第２ジョイント部材２７の第２接続部２７ｂと後方収納部材３９ｃとが、軸芯を中心とする相対的な回転運動を拘束される拘束部が形成される。第１実施形態と同様に、第１ジョイント部材２６の第１受圧部２６ａ及び第２ジョイント部材２７の第２受圧部２７ａに平行面が形成され、これら平行面に合わせて、それぞれの収納部材内に平行面が加工される構成であっても良いし、それぞれの軸芯を中心とする相対的な回転運動が拘束される形態が適宜採用されれば良い。 Although not shown, as in the first embodiment, the first connection portion 26b of the first joint member 26 and the front storage member 39a are restrained from relative rotational movement around the axis. A restraining portion is formed, and a restraining portion is formed in which the second connecting portion 27b of the second joint member 27 and the rear accommodating member 39c are restrained from relative rotational movement around the axis. Similar to the first embodiment, parallel surfaces are formed on the first pressure receiving portion 26a of the first joint member 26 and the second pressure receiving portion 27a of the second joint member 27, and the inside of each storage member is aligned with these parallel surfaces. It may be configured such that a parallel surface is machined, or a form in which the relative rotational motion around each axis is constrained may be appropriately adopted.

［第３実施形態］
次に、第３実施形態に係る、ダイカストマシンのチップジョイント４４について、図６を参照しながら説明する。図６は、プランジャチップ７、チップジョイント４４及びプランジャロッド８の、長手方向の断面側面図である。第３実施形態のチップジョイント４４が、第２実施形態のチップジョイント３４と相違する点は、収納部材の一方が、第１ジョイント部材及び第２ジョイント部材の一方と一体で形成され、収納部に、第１ジョイント部材及び前記第２ジョイント部材の他方と前記圧力検出部材を収納する点と、第１ジョイント部材及び第２ジョイント部材の他方と、圧力検出部材の、収納部内における該軸芯方向の移動を、収納部材の他方により拘束する点である。したがって、第１実施形態及び第２実施形態と異なる点のみ説明し、それ以外の点については、同じ構成については、第１実施形態及び第２実施形態と同じ符号を使用すると共に、重複する説明は割愛する。 [Third Embodiment]
Next, the tip joint 44 of the die casting machine according to the third embodiment will be described with reference to FIG. FIG. 6 is a sectional side view of the plunger tip 7, the tip joint 44, and the plunger rod 8 in the longitudinal direction. The difference between the tip joint 44 of the third embodiment and the tip joint 34 of the second embodiment is that one of the storage members is integrally formed with one of the first joint member and the second joint member, and the storage portion has a storage portion. , The other of the first joint member and the second joint member and the point for accommodating the pressure detecting member, the other of the first joint member and the second joint member, and the pressure detecting member in the axial core direction in the accommodating portion. It is a point where movement is restrained by the other side of the storage member. Therefore, only the points different from the first embodiment and the second embodiment will be described, and the same reference numerals as those of the first embodiment and the second embodiment will be used for the same configuration except for the other points, and the description will be duplicated. I will omit it.

図５に示すように、収納部材の一方、すなわち、第２実施形態の後方収納部材３９ｃに相当する後方収納部４９ｃが、第２ジョイント部材４７と一体で形成され、収納部２９ａに、第１ジョイント部材２６と圧力検出部材２８が収納されている。そして、第１ジョイント部材２６と圧力検出部材２８の、収納部２９ａ内における軸芯方向の移動を、収納部材の他方、すなわち、前方収納部材４９ａにより拘束している。具体的には、第１ジョイント部材２６側の前方収納部材４９ａの後方（プランジャロッド８側）には、軸芯方向に雌ねじ部４９ｂが形成されている。そして、第２ジョイント部材４７側の後方収納部４９ｃの前方（プランジャチップ７側）には、前方収納部材４９ａの雌ねじ部４９ｂに螺合する雄ねじ部４９ｄが形成されている。また、前方収納部材４９ａ及び第２ジョイント部材４７の外周面には、互いをねじ込み可能にする、図示しない２面幅等の回転拘束部が形成されている。前方収納部材４９ａの雌ねじ部４９ｂと後方収納部４９ｃの雄ねじ部４９ｄはそれぞれ逆に形成されても良い。 As shown in FIG. 5, one of the storage members, that is, the rear storage portion 49c corresponding to the rear storage member 39c of the second embodiment is integrally formed with the second joint member 47, and the storage portion 29a has a first. The joint member 26 and the pressure detecting member 28 are housed in the joint member 26 and the pressure detecting member 28. Then, the movement of the first joint member 26 and the pressure detecting member 28 in the storage portion 29a in the axial center direction is restrained by the other of the storage members, that is, the front storage member 49a. Specifically, a female screw portion 49b is formed in the axial direction behind the front storage member 49a on the first joint member 26 side (plunger rod 8 side). A male screw portion 49d screwed to the female screw portion 49b of the front storage member 49a is formed in front of the rear storage portion 49c on the second joint member 47 side (plunger tip 7 side). Further, on the outer peripheral surfaces of the front storage member 49a and the second joint member 47, rotation restraint portions having a width across flats (not shown) are formed so that they can be screwed into each other. The female threaded portion 49b of the front accommodating member 49a and the male threaded portion 49d of the rear accommodating portion 49c may be formed in reverse.

ここで、前方収納部材４９ａ及び第２ジョイント部材４７をねじ込んで形成される収納部２９ａは、双方をねじ込むねじ込み度合いにより、軸芯方向の長さを調整可能である。すなわち、収納部２９ａに、第１ジョイント部材２６及び圧力検出部材２８を収納した状態で、その長さを調整し、第１受圧部２６ａの厚みと圧力検出部材２８の厚みとを合計した寸法と略同じ寸法にすることが可能であり、また、この状態で、それぞれの収納部材（収納部）のねじ込み代が残るように構成される。これにより、第１実施形態のように、シムプレートや押圧構造による軸芯方向のギャップの補正（解消）を必要とせず、これら部材の、収納部２９ａ内における該軸芯方向の移動の拘束が可能である。また、ねじ込み度合いを増して、圧力検出部材２８に、確実に初期荷重を付与させることが好ましい。この初期荷重により、先に説明した、軸芯方向に作用する荷重の補正（制御上相殺する）と相まって、よりプランジャチップ７の軸芯方向に作用する荷重の検出精度を向上させることができる。 Here, the length of the storage portion 29a formed by screwing the front storage member 49a and the second joint member 47 in the axial core direction can be adjusted by the degree of screwing in both of them. That is, the length of the first joint member 26 and the pressure detecting member 28 is adjusted in the state where the first joint member 26 and the pressure detecting member 28 are housed in the accommodating portion 29a, and the total dimension of the thickness of the first pressure receiving portion 26a and the thickness of the pressure detecting member 28 is used. It is possible to make the dimensions substantially the same, and in this state, it is configured so that the screwing allowance of each storage member (storage portion) remains. As a result, unlike the first embodiment, it is not necessary to correct (eliminate) the gap in the axial center direction by the shim plate or the pressing structure, and the movement of these members in the axial core direction in the storage portion 29a is restricted. It is possible. Further, it is preferable to increase the screwing degree to surely apply the initial load to the pressure detecting member 28. This initial load, combined with the correction of the load acting in the axis direction (which cancels out in terms of control) described above, can further improve the detection accuracy of the load acting in the axis direction of the plunger tip 7.

更に、軸芯方向に直交する平面上で２分割可能に構成された収納部材の一方が、第１ジョイント部材及び第２ジョイント部材の一方と一体で形成されることにより、チップジョイント４４の全長を、第１実施形態のチップジョイント２４や第２実施形態のチップジョイント３４に対して短くすることが可能である。これにより、第１実施形態のチップジョイント２４や第２実施形態のチップジョイント３４の形態で、一般的なチップジョイント１４（図３）と同じ長さにすることが難しい場合であっても、第３実施形態のチップジョイント４４の形態を採用することにより、チップジョイントの全長を抑制して、プランジャ従来のプランジャチップ７及びプランジャロッド８をそのまま流用できるケースを増やすことができる。 Further, one of the storage members configured to be split into two on a plane orthogonal to the axis direction is integrally formed with one of the first joint member and the second joint member, whereby the total length of the tip joint 44 can be reduced. , It is possible to make it shorter than the tip joint 24 of the first embodiment and the tip joint 34 of the second embodiment. As a result, even if it is difficult to make the same length as the general tip joint 14 (FIG. 3) in the form of the tip joint 24 of the first embodiment or the tip joint 34 of the second embodiment, the first embodiment is used. By adopting the form of the tip joint 44 of the third embodiment, it is possible to suppress the total length of the tip joint and increase the number of cases where the conventional plunger tip 7 and the plunger rod 8 can be diverted as they are.

以上、発明を実施するための形態について、第１実施形態、第２実施形態及び第３実施形態を説明したが、本発明は、上記の実施の形態に限定されることなく、特許請求の範囲に記載された内容を逸脱しない範囲で、色々な形で実施できることは言うまでもない。 Although the first embodiment, the second embodiment and the third embodiment have been described above with respect to the embodiments for carrying out the invention, the present invention is not limited to the above-described embodiments and is within the scope of claims. Needless to say, it can be carried out in various forms as long as it does not deviate from the contents described in.

例えば、第３実施形態において、第２実施形態の後方収納部材に相当する後方収納部が、第２ジョイント部材と一体で形成され、収納部に、第１ジョイント部材と圧力検出部材が収納され、これら部材の、収納部内における軸芯方向の移動を、前方収納部材により拘束する形態を示した。しかしながら、この逆、すなわち、第２実施形態の前方収納部材に相当する前方収納部が、第１ジョイント部材と一体で形成され、収納部に、圧力検出部材と第２ジョイント部材とが収納され、これら部材の、収納部内における軸芯方向の移動を、後方収納部材により拘束する形態であっても良い。 For example, in the third embodiment, the rear storage portion corresponding to the rear storage member of the second embodiment is integrally formed with the second joint member, and the first joint member and the pressure detecting member are housed in the storage portion. The mode in which the movement of these members in the axial core direction in the storage portion is restrained by the front storage member is shown. However, the opposite, that is, the front storage portion corresponding to the front storage member of the second embodiment is integrally formed with the first joint member, and the pressure detection member and the second joint member are housed in the storage portion. The movement of these members in the axial core direction in the storage portion may be restrained by the rear storage member.

２４ チップジョイント、２６ 第１ジョイント部材、２６ａ 第１受圧部、２６ｂ 第１接続部、２７ 第２ジョイント部材、２７ａ 第２受圧部、２７ｂ 第２接続部、２８ 圧力検出部材、２８ａ 受圧面、２８ｂ 圧力検出素子、２９ 収納部材、２９ａ 収納部、２９ｂ 平行面、２９ｃ 平行面、３４ チップジョイント、３９ 収納部材、３９ａ 前方収納部材、３９ｂ 雌ねじ部、３９ｃ 後方収納部材、３９ｄ 雄ねじ部、４４ チップジョイント、４７ 第２ジョイント部材、４９ａ 前方収納部材、４９ｂ 雌ねじ部、４９ｃ 後方収納部、４９ｄ 雄ねじ部 24 Tip joint, 26 1st joint member, 26a 1st pressure receiving part, 26b 1st connecting part, 27 2nd joint member, 27a 2nd receiving part, 27b 2nd connecting part, 28 pressure detecting member, 28a pressure receiving surface, 28b Pressure detection element, 29 storage member, 29a storage part, 29b parallel surface, 29c parallel surface, 34 tip joint, 39 storage member, 39a front storage member, 39b female thread part, 39c rear storage member, 39d male thread part, 44 tip joint, 47 2nd joint member, 49a front storage member, 49b female threaded part, 49c rear storage part, 49d male threaded part

Claims (7)

第１受圧部と、該第１受圧部から突出し、プランジャチップが接続される第１接続部とが形成される第１ジョイント部材と、
第２受圧部と、該第２受圧部から突出し、プランジャロッドが接続される第２接続部とが形成される第２ジョイント部材と、
前記第１ジョイント部材の前記第１受圧部と、前記前記第２ジョイント部材の前記第２受圧部との間に、環状の圧力検出部材を介在させた状態で、前記第１ジョイント部材の前記第１受圧部、前記第２ジョイント部材の前記第２受圧部及び前記圧力検出部材を収納する収納部を備え、
前記収納部に、前記第１ジョイント部材の前記第１受圧部、前記第２ジョイント部材の前記第２受圧部及び前記圧力検出部材を収納すると共に、
前記第１ジョイント部材の前記第１接続部と、前記第２ジョイント部材の前記第２接続部との少なくとも一部を、前記第１接続部及び前記第２接続部のそれぞれの軸芯が同軸上になるように突出させた状態で、前記第１ジョイント部材、前記第２ジョイント部材及び前記圧力検出部材の、前記収納部内における該軸芯方向の移動を拘束する収納部材と、を備える、ダイカストマシンのチップジョイント。 A first joint member forming a first pressure receiving portion and a first connecting portion protruding from the first pressure receiving portion and to which a plunger tip is connected.
A second joint member forming a second pressure receiving portion and a second connecting portion protruding from the second pressure receiving portion and to which a plunger rod is connected.
The first joint member of the first joint member has an annular pressure detecting member interposed between the first pressure receiving portion of the first joint member and the second pressure receiving portion of the second joint member . 1 The pressure receiving portion , the second pressure receiving portion of the second joint member , and the accommodating portion for accommodating the pressure detecting member are provided.
The first pressure receiving portion of the first joint member , the second pressure receiving portion of the second joint member, and the pressure detecting member are housed in the accommodating portion.
At least a part of the first connection portion of the first joint member and the second connection portion of the second joint member is coaxial with the axes of the first connection portion and the second connection portion. A die casting machine including a storage member that restrains the movement of the first joint member, the second joint member, and the pressure detecting member in the storage portion in the axial center direction in a state of being projected so as to be. Tip joint. 前記収納部材が、前記軸芯を通る平面によって２分割可能に構成されることを特徴とする、請求項１に記載の、ダイカストマシンのチップジョイント。 The tip joint of a die casting machine according to claim 1, wherein the storage member is configured to be divisible by a plane passing through the shaft core. 前記収納部材が、前記軸芯に直交する平面によって２分割可能に構成されることを特徴とする、請求項１に記載の、ダイカストマシンのチップジョイント。 The tip joint of a die casting machine according to claim 1, wherein the storage member is configured to be divisible by a plane orthogonal to the axis. 前記収納部材の一方が、前記第１ジョイント部材及び前記第２ジョイント部材の一方と一体で形成され、
前記収納部に、前記第１ジョイント部材及び前記第２ジョイント部材の他方の受圧部と前記圧力検出部材を収納すると共に、
前記第１ジョイント部材の前記第１接続部と、前記第２ジョイント部材の前記第２接続部との少なくとも一部を、前記第１接続部及び前記第２接続部のそれぞれの軸芯が同軸上になるように突出させた状態で、前記第１ジョイント部材及び前記第２ジョイント部材の他方と、前記圧力検出部材の、前記収納部内における該軸芯方向の移動を、前記収納部材の他方により拘束することを特徴とする、請求項３に記載の、ダイカストマシンのチップジョイント。 One of the storage members is integrally formed with one of the first joint member and the second joint member.
In addition to accommodating the other pressure receiving portion of the first joint member and the second joint member and the pressure detecting member in the accommodating portion,
At least a part of the first connection portion of the first joint member and the second connection portion of the second joint member is coaxial with the axes of the first connection portion and the second connection portion. The movement of the first joint member and the other of the second joint member and the pressure detecting member in the storage portion in the axial center direction is restrained by the other of the storage members in a state of being projected so as to be. The tip joint of the die casting machine according to claim 3, wherein the die casting machine is to be used. 前記収納部材の、それぞれの分割部分に対向するように形成された雌ねじ部及び雄ねじ部のねじ込み度合いにより、前記収納部の前記軸芯方向の長さを調節可能に構成されることを特徴とする、請求項３又は請求項４に記載の、ダイカストマシンのチップジョイント。 The storage member is characterized in that the length of the storage portion in the axial core direction can be adjusted by the degree of screwing of the female screw portion and the male screw portion formed so as to face each of the divided portions. , The tip joint of the die casting machine according to claim 3 or 4. 前記第１受圧部、前記圧力検出部及び前記第２受圧部が、前記収納部材の前記収納部に収納された状態で、前記第１接続部及び前記第２接続部のそれぞれと、前記収納部材とが、前記軸芯を中心とする相対的な回転運動を拘束される拘束部が形成されることを特徴とする、請求項１乃至請求項５のいずれか１項に記載の、ダイカストマシンのチップジョイント。 With the first pressure receiving unit, the pressure detecting unit, and the second pressure receiving unit housed in the storage unit of the storage member, each of the first connection unit and the second connection unit, and the storage member. The die casting machine according to any one of claims 1 to 5, wherein a restraining portion that restrains a relative rotational movement about the axis is formed. Tip joint. 前記圧力検出部材の受圧面に対して、少なくとも２つの圧力検出素子が、略均等に離間させて配置されることを特徴とする、請求項１乃至請求項６のいずれか１項に記載の、ダイカストマシンのチップジョイント。 The invention according to any one of claims 1 to 6, wherein at least two pressure detecting elements are arranged so as to be substantially evenly spaced from each other with respect to the pressure receiving surface of the pressure detecting member. Chip joint of die casting machine.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000158114A (en) 1998-11-26 2000-06-13 Masashi Katsumi Plunger for die cast equipment
JP2016078068A (en) 2014-10-15 2016-05-16 東芝機械株式会社 Injection device, molding device and production method of molded article

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000158114A (en) 1998-11-26 2000-06-13 Masashi Katsumi Plunger for die cast equipment
JP2016078068A (en) 2014-10-15 2016-05-16 東芝機械株式会社 Injection device, molding device and production method of molded article

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