JP2017113922A - Injection molding machine - Google Patents

Injection molding machine Download PDF

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JP2017113922A
JP2017113922A JP2015249489A JP2015249489A JP2017113922A JP 2017113922 A JP2017113922 A JP 2017113922A JP 2015249489 A JP2015249489 A JP 2015249489A JP 2015249489 A JP2015249489 A JP 2015249489A JP 2017113922 A JP2017113922 A JP 2017113922A
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screw
load
molten resin
molding machine
injection molding
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JP2017113922A5 (en
Inventor
努 渡辺
Tsutomu Watanabe
努 渡辺
政人 杉浦
Masato Sugiura
政人 杉浦
和幸 原田
Kazuyuki Harada
和幸 原田
隆綱 大場
Takatsuna Ooba
隆綱 大場
麻由 細井
Mayu Hosoi
麻由 細井
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Toyooki Kogyo Co Ltd
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Toyooki Kogyo Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide an injection molding machine of high molding accuracy.SOLUTION: The injection molding machine includes: a screw 7 housed in a cylinder 1; a driving part 8 for rotating and moving the screw 7 in an axial direction; and heaters 6A to 6D for heating a resin material to acquire a molten resin. The resin material fed to a rear end side of the screw 7 is transferred to a tip side of the screw 7 by rotating the screw 7 to fill the molten resin to the tip side of the screw 7 so as to eject the molten resin into a mold by moving the screw 7 to an ejecting direction. The driving part 8 includes a load meter 17 for measuring a load imposed upon the screw 7. The load meter 17 measures the load imposed upon the screw 7 in the move of the screw 7 to the ejecting direction and the move to a measuring direction opposite to the ejecting direction.SELECTED DRAWING: Figure 1

Description

本発明は、樹脂を溶融して射出する射出成形機に関する。   The present invention relates to an injection molding machine that melts and injects a resin.

この種の射出成形機は、樹脂材料を加熱して溶融樹脂とする加熱器を備えたシリンダに、スクリューを収装している。スクリューは、モータで回転すると共に、油圧シリンダによって前進・後退する。スクリューの後部側へ供給された樹脂材料は、シリンダに備えられた加熱器によって溶融樹脂とされ、スクリューを回転しつつ後退することで、溶融樹脂がスクリューの先端側に計量される。そして、スクリューの先端側に充填された溶融樹脂は、スクリューの前進で射出される。また、スクリューの根元部には荷重計を備え、スクリューに付与される射出方向への荷重を計測している。   In this type of injection molding machine, a screw is housed in a cylinder provided with a heater that heats a resin material to form a molten resin. The screw is rotated by a motor and moved forward and backward by a hydraulic cylinder. The resin material supplied to the rear side of the screw is made into molten resin by a heater provided in the cylinder, and the molten resin is measured toward the tip side of the screw by moving backward while rotating the screw. And the molten resin with which the front end side of the screw was filled is injected by advance of a screw. In addition, a load meter is provided at the root of the screw, and the load in the injection direction applied to the screw is measured.

特開平９−１０９２２２JP-A-9-109222

ところが、かかる従来の射出成形機では、スクリューの先端側に溶融樹脂が十分に充填されたか否かがわからないため、射出により成形品を成形する際に、設定寸法に満たない成形品や気泡を含む成形品が成形される恐れがあった。   However, in such a conventional injection molding machine, since it is not known whether or not the molten resin is sufficiently filled on the tip side of the screw, when the molded product is molded by injection, the molded product includes a molded product or bubbles that do not satisfy the set dimensions. There was a risk that the molded product was molded.

本発明の課題は、成形精度の高い射出成形機を提供するものである。   An object of the present invention is to provide an injection molding machine with high molding accuracy.

かかる課題を達成すべく、本発明は次の手段をとった。即ち、シリンダに収装されるスクリューと、スクリューを回転および軸方向移動させるための駆動部と、樹脂材料を加熱して溶融樹脂とさせるための加熱器とを備え、スクリューの回転によりスクリューの後部側へ供給された樹脂材料をスクリューの先端側へ移送して、スクリューの先端側に溶融樹脂を充填し、スクリューの射出方向への移動によって金型内に溶融樹脂を射出する射出成形機において、駆動部には、スクリューに付与される荷重を計測する荷重計を設け、荷重計は、スクリューの射出方向への移動および射出方向と反対となる計量方向への移動において、スクリューに付与される荷重を計測するものであることを特徴とする射出成形機がそれである。   In order to achieve this problem, the present invention has taken the following measures. That is, a screw that is housed in a cylinder, a drive unit that rotates and axially moves the screw, and a heater that heats the resin material into molten resin, and the rear part of the screw by rotating the screw In the injection molding machine that transports the resin material supplied to the side to the tip side of the screw, fills the tip of the screw with molten resin, and injects the molten resin into the mold by moving in the injection direction of the screw, The drive unit is provided with a load meter that measures the load applied to the screw, and the load meter applies the load applied to the screw in the movement of the screw in the injection direction and in the measurement direction opposite to the injection direction. It is an injection molding machine characterized by measuring the above.

以上詳述したように、請求項１に記載の発明は、スクリューの射出方向への移動および射出方向と反対となる計量方向への移動において、スクリューに付与される荷重を荷重計で計測する。このため、荷重計で計測したスクリューに付与される計量方向への荷重に基づいてスクリューの計量方向への後退を制御できるから、スクリューの先端側に溶融樹脂を十分に充填することが可能となり、高精度な成形品の成形が可能となる。また、１つの荷重計でスクリューの射出及び計量の両方向への移動における荷重を計測しているので、部品点数を減少することができ、コンパクトな形状になる。 As described above in detail, according to the first aspect of the present invention, the load applied to the screw is measured by a load meter in the movement of the screw in the injection direction and in the measurement direction opposite to the injection direction. For this reason, since it is possible to control the backward movement in the metering direction of the screw based on the load in the metering direction applied to the screw measured by the load meter, it is possible to sufficiently fill the molten resin on the tip side of the screw, High-precision molded products can be molded. In addition, since the load in both the injection and metering movements of the screw is measured with one load meter, the number of parts can be reduced, resulting in a compact shape.

本発明の一実施形態を示した射出成形機の一部を断面とした正面図である。It is the front view which made a part of injection molding machine which showed one embodiment of the present invention a section. 本発明の一実施形態を示した射出成形機の平面図である。It is a top view of the injection molding machine which showed one Embodiment of this invention. 本発明の一実施形態を示した射出成形機の要部拡大図である。It is a principal part enlarged view of the injection molding machine which showed one Embodiment of this invention.

以下、本発明の一実施形態を図面に基づき説明する。
図１および図２において、１は基台部材２に側方へ突設したシリンダで、軸心には貫通孔１Ａを穿設している。３は複数本のボルト部材４によってシリンダ１の先端部に固定したシリンダヘッドで、軸心にはシリンダ１の貫通孔１Ａと同軸心上で接続する貫通孔３Ａを穿設している。５はシリンダヘッド３に具備したノズルで、軸心にはシリンダヘッド３の貫通孔３Ａと同軸心上で接続する貫通孔５Ａを穿設している。そして、ノズル５は、先端を図示しない金型への溶融樹脂注入口に押し付けられるようになっている。６Ａ〜６Ｄは樹脂材料を溶融する加熱器としてのバンドヒーターで、シリンダ１とシリンダヘッド３およびノズル５の外周部にそれぞれ巻装している。７はシリンダ１の貫通孔１Ａに収装されたスクリューで、外周面に螺旋部７Ａを形成し、駆動部８により回転および軸方向へ移動自在に設け、後端をシリンダ１より突出している。スクリュー７は回転により螺旋部７Ａで後部側に供給された樹脂材料を先端側へ移送する。９はシリンダ１の後部で基台部材２に立設したホッパーで、基台部材２の内部に穿設の供給路９Ａを介して、樹脂材料をスクリュー７の後部側へ供給する。駆動部８はスクリュー７を回転させる電動機１０およびスクリュー７を軸方向へ移動させる油圧シリンダ１１、１２等から構成している。電動機１０は出力軸１３を突出して回転自在に設けている。油圧シリンダ１１、１２はシリンダ本体１１Ａ、１２Ａからピストンロッド１１Ｂ、１２Ｂを突出して軸方向へ移動自在に設けている。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 and 2, reference numeral 1 denotes a cylinder projecting laterally from the base member 2, and a through hole 1A is formed in the shaft center. Reference numeral 3 denotes a cylinder head fixed to the tip of the cylinder 1 by a plurality of bolt members 4, and a through hole 3 </ b> A that is coaxially connected to the through hole 1 </ b> A of the cylinder 1 is formed in the shaft center. Reference numeral 5 denotes a nozzle provided in the cylinder head 3, and a through hole 5 </ b> A that is coaxially connected to the through hole 3 </ b> A of the cylinder head 3 is formed in the axial center. The nozzle 5 is configured such that the tip is pressed against a molten resin injection port to a mold (not shown). Reference numerals 6A to 6D denote band heaters as heaters for melting the resin material, which are wound around the outer periphery of the cylinder 1, the cylinder head 3, and the nozzle 5, respectively. A screw 7 accommodated in the through hole 1A of the cylinder 1 has a spiral portion 7A formed on the outer peripheral surface thereof, and is provided so as to be rotatable and movable in the axial direction by the drive portion 8, and its rear end protrudes from the cylinder 1. The screw 7 moves the resin material supplied to the rear side by the spiral portion 7 </ b> A by rotation to the tip side. Reference numeral 9 denotes a hopper that is erected on the base member 2 at the rear part of the cylinder 1, and supplies the resin material to the rear part side of the screw 7 through a supply passage 9 </ b> A provided in the base member 2. The drive unit 8 includes an electric motor 10 that rotates the screw 7 and hydraulic cylinders 11 and 12 that move the screw 7 in the axial direction. The electric motor 10 has an output shaft 13 protruding and rotatably provided. The hydraulic cylinders 11 and 12 are provided so as to be movable in the axial direction by projecting piston rods 11B and 12B from the cylinder bodies 11A and 12A.

１４は基台部材２の側方へ配置したスライド部材で、基台部材２に対してシリンダ１の突設方向と反対の方向へ位置し、ベース１５上へ移動自在に設けている。１６はスライド部材１４に有するブロック部材で、貫通孔１６Ａを穿設している。１７はスクリュー７に付与される荷重を計測する荷重計で、合金鋼から成り、外環部１７Ａと内環部１７Ｂとを薄肉部１７Ｃで接続する構造で円環状に形成し、外環部１７Ａをブロック部材１６に複数のボルト部材１８によって固定されている。１９は電動機１０を取付けた固定部材で、ブロック部材１６の貫通孔１６Ａを挿通し、荷重計１７の内環部１７Ｂに複数のボルト部材２０によって取付けられている。２１は電動機１０の出力軸１３とスクリュー７を連結する連結軸で、電動機１０の出力軸１３先端とスクリュー７後端との間に配置し、スクリュー７後端と継手２２を介して固定している。２３は連結軸２１を軸支する円筒状の軸支部材で、内部に収装した一対の円錐ころ軸受２４、２５で連結軸２１を軸方向と径方向に軸支し、荷重計１７の内環部１７Ｂに複数のボルト部材２０によって取付けられている。２６は軸支部材２３の内部を閉塞する蓋部材である。２７は油圧シリンダ１１、１２を基台部材２に取付ける取付部材で、基台部材２より左右に張り出した一対の腕部２７Ａ、２７Ｂに油圧シリンダ１１、１２のシリンダ本体１１Ａ、１２Ａを取付けている。そして、油圧シリンダ１１、１２はピストンロッド１１Ｂ、１２Ｂをブロック部材１６に取付けている。２８はスクリュー７の前進、後退位置を検知する位置センサで、基台部材２に取付け、ブロック部材１６の軸方向位置を検知することで、ブロック部材１６と一体的に軸方向移動するスクリュー７の前進、後退位置を検知する。 Reference numeral 14 denotes a slide member arranged on the side of the base member 2, which is positioned in a direction opposite to the projecting direction of the cylinder 1 with respect to the base member 2 and is movably provided on the base 15. Reference numeral 16 denotes a block member provided in the slide member 14 and has a through hole 16A. 17 is a load meter that measures the load applied to the screw 7 and is made of alloy steel. The outer ring portion 17A is formed in an annular shape with a structure in which the outer ring portion 17A and the inner ring portion 17B are connected by a thin portion 17C. The block member 16 is fixed by a plurality of bolt members 18. A fixing member 19 to which the electric motor 10 is attached is inserted through the through hole 16A of the block member 16 and is attached to the inner ring portion 17B of the load meter 17 by a plurality of bolt members 20. 21 is a connecting shaft that connects the output shaft 13 of the electric motor 10 and the screw 7, and is arranged between the front end of the output shaft 13 of the electric motor 10 and the rear end of the screw 7, and is fixed via the rear end of the screw 7 and the joint 22. Yes. Reference numeral 23 denotes a cylindrical shaft support member that supports the connection shaft 21, and a pair of tapered roller bearings 24 and 25 housed inside support the connection shaft 21 in the axial direction and the radial direction. A plurality of bolt members 20 are attached to the ring portion 17B. A lid member 26 closes the inside of the shaft support member 23. Reference numeral 27 denotes an attachment member for attaching the hydraulic cylinders 11 and 12 to the base member 2, and the cylinder bodies 11A and 12A of the hydraulic cylinders 11 and 12 are attached to a pair of arm portions 27A and 27B protruding from the base member 2 to the left and right. . The hydraulic cylinders 11 and 12 have piston rods 11 </ b> B and 12 </ b> B attached to the block member 16. Reference numeral 28 denotes a position sensor that detects the forward and backward positions of the screw 7. The position sensor 28 is attached to the base member 2 and detects the axial position of the block member 16. Detects forward and backward positions.

図３において、荷重計１７は外環部１７Ａを複数のボルト部材１８によってブロック部材１６に固定し、内環部１７Ｂを軸支部材２３と固定部材１９との間に挟持され複数のボルト部材２０で固定している。また、荷重計１７は、外環部１７Ａと内環部１７Ｂを接続する薄肉部１７Ｃの撓みによって、スクリュー７に付与される計量方向（図３右方向）への荷重を検知する。詳述するに、荷重計１７は、射出時には、油圧シリンダ１１、１２によってブロック部材１６と共に射出方向（図３右方向）へ前進し、スクリュー７に付与される荷重によって薄肉部１７Ｃが計量方向（図３右方向）へ撓むことでスクリュー７へ付与される荷重を検知する。また、荷重計１７は、計量時には、ブロック部材１６と共に計量方向（図３右方向）へ後退し、スクリュー７に付与される荷重によって薄肉部１７Ｃが計量方向（図３右方向）に撓むことでスクリュー７へ付与される荷重を検知する。２９、３０は連結軸２１に装着されたシール部材で、軸支部材２３の内部を液密的に封止し、軸支部材２３の内部にはグリスが封入されている。 In FIG. 3, the load meter 17 fixes the outer ring portion 17 </ b> A to the block member 16 by a plurality of bolt members 18, and the inner ring portion 17 </ b> B is sandwiched between the shaft support member 23 and the fixing member 19. It is fixed with. The load meter 17 detects a load applied to the screw 7 in the measuring direction (right direction in FIG. 3) by bending of the thin portion 17C connecting the outer ring portion 17A and the inner ring portion 17B. More specifically, the load meter 17 is advanced in the injection direction (right direction in FIG. 3) together with the block member 16 by the hydraulic cylinders 11 and 12 at the time of injection. The load applied to the screw 7 is detected by bending in the right direction in FIG. Further, the load meter 17 moves backward in the measurement direction (right direction in FIG. 3) together with the block member 16 at the time of measurement, and the thin portion 17C is bent in the measurement direction (right direction in FIG. 3) due to the load applied to the screw 7. Thus, the load applied to the screw 7 is detected. 29 and 30 are seal members attached to the connecting shaft 21, and the inside of the shaft support member 23 is liquid-tightly sealed, and grease is sealed inside the shaft support member 23.

次に、かかる構成の作動を説明する。
図１は、スクリュー７の初期状態を示し、スクリュー７は射出を完了した前進端位置にある。
この状態において、電動機１０によってスクリュー７を回転すると、ホッパー９から供給路９Ａを介してスクリュー７の後部側に供給された樹脂材料は、バンドヒーター６Ａ〜６Ｄによって加熱されながら、溶融樹脂としてスクリュー７の先端側であるシリンダヘッド３の貫通孔３Ａおよびノズル５の貫通孔５Ａ内に移送される。 Next, the operation of this configuration will be described.
FIG. 1 shows the initial state of the screw 7, which is in the forward end position where injection has been completed.
In this state, when the screw 7 is rotated by the electric motor 10, the resin material supplied to the rear side of the screw 7 from the hopper 9 via the supply path 9A is heated by the band heaters 6A to 6D while being melted as the screw 7 Are transferred into the through hole 3 </ b> A of the cylinder head 3 and the through hole 5 </ b> A of the nozzle 5.

溶融樹脂がスクリュー７の先端側に充填されると、スクリュー７の先端側の圧力が上昇する。この圧力上昇による反力がスクリュー７に作用してスクリュー７を計量方向としての図１右方向へ押し返し、反力を荷重計１７がスクリュー７に付与される荷重として検知する。そして、検知した荷重が予め設定した基準値に到達すると油圧シリンダ１１、１２によってスクリュー７は計量方向（図１右方向）への後退を始める。そして、後退中において、検知した荷重が基準値より高い場合には油圧シリンダ１１、１２によってスクリュー７の計量方向への後退速度を速め、荷重が基準値より低い場合には荷重が基準値に到達するまでスクリュー７の計量方向への後退を停止するように制御する。そして、計量完了位置までスクリュー７が後退したことを位置センサ２８で検知すると、スクリュー７の回転および後退を停止する。その後ノズル５からのハナタレ防止のために一定量スクリュー７をさらに後退し、計量は完了する。 When the molten resin is filled on the distal end side of the screw 7, the pressure on the distal end side of the screw 7 increases. The reaction force due to this pressure increase acts on the screw 7 and pushes the screw 7 back in the right direction in FIG. 1 as the measuring direction, and the load meter 17 detects the load applied to the screw 7. When the detected load reaches a preset reference value, the hydraulic cylinders 11 and 12 cause the screw 7 to start retreating in the measuring direction (right direction in FIG. 1). During reverse, when the detected load is higher than the reference value, the hydraulic cylinders 11 and 12 increase the reverse speed of the screw 7 in the measuring direction, and when the load is lower than the reference value, the load reaches the reference value. Control is performed so as to stop the backward movement of the screw 7 in the metering direction until it stops. When the position sensor 28 detects that the screw 7 has been retracted to the measurement completion position, the rotation and retraction of the screw 7 are stopped. Thereafter, the screw 7 is further retracted by a predetermined amount to prevent dripping from the nozzle 5, and the metering is completed.

この計量が完了した状態で、油圧シリンダ１１、１２によってブロック部材１６とともにスクリュー７は射出方向（図１左方向）へ前進すると、スクリュー７の先端側に充填された溶融樹脂をノズル５から金型に注入する。スクリュー７が前進し、スクリュー７の射出動作を位置センサ２８による位置制御から荷重計１７による圧力制御に切換える保圧切換位置に到達すると、スクリュー７の先端側に圧力をかけて溶融樹脂を金型に押し込む保圧を行う。このとき、スクリュー７に作用する圧力の反力を荷重計１７で検知し、圧力制御を行う。そして、保圧が完了し、射出が終了すると、スクリュー７が図１の前進端位置に復帰して停止する。 When the metering is completed and the screw 7 is advanced together with the block member 16 in the injection direction (left direction in FIG. 1) by the hydraulic cylinders 11 and 12, the molten resin filled in the tip side of the screw 7 is transferred from the nozzle 5 to the mold. Inject. When the screw 7 moves forward and reaches the holding pressure switching position where the injection operation of the screw 7 is switched from the position control by the position sensor 28 to the pressure control by the load meter 17, pressure is applied to the distal end side of the screw 7 to mold the molten resin. Hold pressure to push into. At this time, the reaction force of the pressure acting on the screw 7 is detected by the load meter 17 to perform pressure control. When the pressure holding is completed and the injection is completed, the screw 7 returns to the forward end position in FIG. 1 and stops.

かかる作動で、スクリュー７の射出方向（図１左方向）および計量方向（図１右方向）への移動において、スクリュー７に付与される荷重を荷重計１７で計測する。このため、荷重計１７で計測したスクリュー７に付与される計量方向への荷重に基づいてスクリュー７の計量方向への後退を制御できるから、スクリュー７の先端側に溶融樹脂を十分に充填することが可能となり、高精度な成形品の成形が可能となる。また、１つの荷重計１７でスクリュー７の射出及び計量の両方向への移動における荷重を計測しているので、部品点数を減少することができ、コンパクトな形状になる。 With this operation, the load applied to the screw 7 is measured by the load meter 17 in the movement of the screw 7 in the injection direction (left direction in FIG. 1) and the measurement direction (right direction in FIG. 1). For this reason, since the backward movement in the measuring direction of the screw 7 can be controlled based on the load in the measuring direction applied to the screw 7 measured by the load meter 17, the molten resin is sufficiently filled on the tip side of the screw 7. Therefore, it becomes possible to mold a highly accurate molded product. In addition, since the load in both the injection and metering movements of the screw 7 is measured by one load meter 17, the number of parts can be reduced, and a compact shape can be obtained.

１：シリンダ
２：シリンダヘッド
６Ａ〜６Ｄ：バンドヒーター
７：スクリュー
８：駆動部
１０：電動機
１１,１２：油圧シリンダ
１７：荷重計
1: Cylinder 2: Cylinder heads 6A to 6D: Band heater 7: Screw 8: Drive unit 10: Electric motor 11, 12: Hydraulic cylinder 17: Load meter

Claims (1)

シリンダに収装されるスクリューと、スクリューを回転および軸方向移動させるための駆動部と、樹脂材料を加熱して溶融樹脂とさせるための加熱器とを備え、スクリューの回転によりスクリューの後部側へ供給された樹脂材料をスクリューの先端側へ移送して、スクリューの先端側に溶融樹脂を充填し、スクリューの射出方向への移動によって金型内に溶融樹脂を射出する射出成形機において、駆動部には、スクリューに付与される荷重を計測する荷重計を設け、荷重計は、スクリューの射出方向への移動および射出方向と反対となる計量方向への移動において、スクリューに付与される荷重を計測するものであることを特徴とする射出成形機。 A screw that is housed in the cylinder, a drive unit that rotates and axially moves the screw, and a heater that heats the resin material to make it into molten resin. In an injection molding machine that transports the supplied resin material to the tip of the screw, fills the tip of the screw with molten resin, and injects the molten resin into the mold by moving the screw in the injection direction. Is equipped with a load meter that measures the load applied to the screw, and the load meter measures the load applied to the screw during the movement of the screw in the injection direction and in the measurement direction opposite to the injection direction. An injection molding machine characterized by that.
JP2015249489A 2015-12-22 2015-12-22 Injection molding machine Pending JP2017113922A (en)

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0438412U (en) * 1990-07-27 1992-03-31
JPH05124071A (en) * 1991-11-05 1993-05-21 Masao Kubota Drive mechanism of injection molding machine
JPH0615706A (en) * 1992-07-01 1994-01-25 Sodick Co Ltd Screw-driving device for injection molding machine
WO1994008216A1 (en) * 1992-09-30 1994-04-14 Pifco Limited Load cell
JPH07112463A (en) * 1993-10-20 1995-05-02 Nissei Plastics Ind Co Method and apparatus for setting weighing value of injection molding machine
JP2000117789A (en) * 1998-10-16 2000-04-25 Sumitomo Heavy Ind Ltd Injection device
JP2004154988A (en) * 2002-11-05 2004-06-03 Fanuc Ltd Metering method and controller for injection molding machine
JP2007015165A (en) * 2005-07-06 2007-01-25 Fanuc Ltd Injection device of injection molding machine
JP2007218911A (en) * 2006-02-13 2007-08-30 General Electric Co <Ge> Bearing rotor thrust sensor assembly, and apparatus for measuring bearing thrust load
JP2015163453A (en) * 2014-02-28 2015-09-10 住友重機械工業株式会社 injection molding machine

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0438412U (en) * 1990-07-27 1992-03-31
JPH05124071A (en) * 1991-11-05 1993-05-21 Masao Kubota Drive mechanism of injection molding machine
JPH0615706A (en) * 1992-07-01 1994-01-25 Sodick Co Ltd Screw-driving device for injection molding machine
WO1994008216A1 (en) * 1992-09-30 1994-04-14 Pifco Limited Load cell
JPH07112463A (en) * 1993-10-20 1995-05-02 Nissei Plastics Ind Co Method and apparatus for setting weighing value of injection molding machine
JP2000117789A (en) * 1998-10-16 2000-04-25 Sumitomo Heavy Ind Ltd Injection device
JP2004154988A (en) * 2002-11-05 2004-06-03 Fanuc Ltd Metering method and controller for injection molding machine
JP2007015165A (en) * 2005-07-06 2007-01-25 Fanuc Ltd Injection device of injection molding machine
JP2007218911A (en) * 2006-02-13 2007-08-30 General Electric Co <Ge> Bearing rotor thrust sensor assembly, and apparatus for measuring bearing thrust load
JP2015163453A (en) * 2014-02-28 2015-09-10 住友重機械工業株式会社 injection molding machine

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