公开(公告)号：EP0597108A1

公开(公告)日：1994-05-18

申请号：EP93900424.8

申请日：1992-12-18

Applicant: SUMITOMO HEAVY INDUSTRIES, LTD

Inventor： MORIKITA, Nobuo

IPC: B29C45/56 ,  B29C45/57

CPC classification number: B29C45/5675 ,  B29C45/572

Abstract: A localized pressurizing type injection molding machine for applying various processings to moldings during the injection molding cycle, and the injection molding machine can apply various processings to the moldings after the injection molding process. The injection molding machine comprises a stationary platen (12) and a movable platen (14). A pressurizing pin (24) extends through at least a portion of either one of the two platens and the forward end thereof is linearly movably disposed inside a cavity. A pressurizing cylinder (32) is provided in the rear of the above-mentioned pressurizing pin (24), whereby a hydraulic pressure supplying means supplies pulse-form hydraulic pressure to the above-mentioned pressurizing cylinder (32), so that the pressurizing pin (24) can be oscillated. The pulse-from pressurizing force is applied to the resin after the fill-up, so that a predetermined processing is applied to the molding. Accordingly, a highly accurate processed surface can be obtained.

公开(公告)号：EP0370050B1

公开(公告)日：1994-05-18

申请号：EP88906558.7

申请日：1988-07-08

Applicant: PRIMTEC

Inventor： SORENSEN, Jens, Ole

IPC: B29C45/04 ,  B29C45/32 ,  B29C45/54 ,  B29C45/56 ,  B29C45/57

CPC classification number: B29C45/32 ,  B29C45/12 ,  B29C45/572 ,  B29C2045/575

Abstract: A system and method of controlling hold pressure applied to molding cavities (71) of a stacked multi-parting injection molding system having desynchronized injection periods while cyclic injection molding a plastic material. A combination of the center molding block (68) and an injection system (75) together provide an adjustable feed system. The feed system is adjusted to enable plastic material to be fed from the injection system through a left branch (81) to the left molding cavity (71). The injected plastic material is confined within the left branch (81) and the left molding cavity (71); and the confined plastic material is hold pressurized by a movable packing element. A like sequence of steps is followed to hold pressurized the right molding cavity. When the molding cavities have desynchronous opening periods, the closed molding cavity is locked to maintain it in a closed position while the other molding cavity is open; and axial clamping force is applied to the locked molding cavity by expanding the thickness of at least one of the molding blocks that defines the locked molding cavity.

公开(公告)号：EP0262229B1

公开(公告)日：1992-12-16

申请号：EP87902159.0

申请日：1987-03-27

Applicant: KABUSHIKI KAISHA KOMATSU SEISAKUSHO

Inventor： MATSUDA, Kazuo ,  INABA, Nobuaki ,  KAMINISHI, Masashi ,  FUNABASHI, Tetsuji ,  TANAKA, Nobukazu

IPC: B29C45/77 ,  B29C45/23 ,  B29C45/57 ,  B29C45/50

CPC classification number: B29C45/76 ,  B29C45/23

Abstract: An injection molding machine which enables the control of the flow rate and speed of molten resins injected from an injection nozzle without a time-lag after the detection of the position of an injection screw and makes possible the control of injection speeds with excellent responsiveness, rapidity, and high accuracy. One rotary nozzle valve (22) for controlling the flow rate of molten resins flowing from an injection screw (2) toward an injection nozzle (12) is provided between one injection screw (2) provided rotatably and movably in a forward and backward direction in a housing (1) and one injection nozzle (12) which is provided at the front end of the housing (1) and injects molten resins into a cavity (14) of a mold (13), where said rotary nozzle valve (22) controls the flow rate and speed of molten resins, cooperating with an injection speed control device and a pressure control device which are provided separately.

公开(公告)号：EP0482743A3

公开(公告)日：1992-06-17

申请号：EP91306770.8

申请日：1991-07-25

Applicant: HOOVER UNIVERSAL INC.

Inventor： Poehlsen, Rudolph Herman

IPC: B29C45/57

CPC classification number: B29C45/57

Abstract: An injection mold machine is disclosed having a pressure assist nozzle (14). The machine has an extruder (16), a nozzle (18), and an housing (24) mounted between the extruder and nozzle. The housing (24) encloses the pressure assist nozzle (14) and a fluidic passage (22) connecting the extruder and the nozzle. A bore (30) within the housing extends into the fluidic passage to define a portion of the passage between the extruder and the nozzle. The bore (30) has an aperture (32) within a side wall which acts as a valve opening within the passage which, when closed, prevents flow between the extruder and the nozzle. An annular sleeve (36) is reciprocated within the bore between a retract position, in which the annular sleeve (36) is withdrawn from the passage, and an extend position, in which the annular sleeve (36) is projected into the passage so as to close the aperture (32). A plunger piston (50) reciprocally resides within the annular sleeve (36). The plunger piston (50) is held in a retracted position by the annular sleeve (36) while the annular sleeve is in its retract position. When the annular sleeve (36) has been actuated to close the aperture (32), the plunger piston (50) becomes coupled with the annular sleeve (36) and accompanies the annular sleeve as it continues toward the extend position such that the plunger piston (50) acts to compress the melt within the molds.

公开(公告)号：EP0188120B1

公开(公告)日：1990-06-27

申请号：EP85309311.0

申请日：1985-12-20

Applicant: NATIONAL RESEARCH DEVELOPMENT CORPORATION

Inventor： Allan, Peter Stewart ,  Bevis, Michael John

IPC: B29C45/00 ,  B29C45/46 ,  B29C45/57

CPC classification number: B29C70/04 ,  B29C45/0082 ,  B29C45/57 ,  B29C67/0003 ,  B29C70/06 ,  B29C70/14 ,  B29C2045/0098 ,  B29K2995/0041 ,  B29K2995/005 ,  B29K2995/0088

公开(公告)号：EP0280734A4

公开(公告)日：1990-01-08

申请号：EP87904939

申请日：1987-07-24

Applicant: FANUC LTD

Inventor： KAMIGUCHI MASAO ,  UMEMOTO HIROSHI

IPC: B29C45/50 ,  B29C45/57 ,  B29C45/76 ,  B29C45/77 ,  G05B19/23

CPC classification number: G05B19/232 ,  B29C45/76 ,  G05B2219/42126 ,  G05B2219/45244

Abstract: In an injection molding machine employing a servo motor as a source for driving the injection axle to drive the screw in the axial direction, a method is provided to smoothly shift the dwelling step to the metering/kneading step, in order to prevent the error register in the servo circuit from overflowing and to prevent the injection molding machine from coming into halt. When the dwelling step is finished, the error register is followed up (steps S6 to S8) such that the error quantity stored in the error register of the servo circuit that drives the servo motor for injection axle becomes zero. Then, a torque limit value to be applied to the servo motor is switched from a setpoint value for dwelling to a setpoint value for metering and kneading (step S11). The error register is then followed up again over a predetermined period of time from when the torque limit value is switched (step S13), and the step is shifted to the metering/kneading step (step S14).

公开(公告)号：EP0204133B1

公开(公告)日：1989-12-27

申请号：EP86105803.0

申请日：1986-04-26

Applicant: Krupp Formaplast Maschinenbau GmbH

Inventor： Schramm, Klaus, Dr. ,  Weist, Friedel

IPC: B29C45/57

CPC classification number: B29C45/57

公开(公告)号：EP0262229A4

公开(公告)日：1989-11-14

申请号：EP87902159

申请日：1987-03-27

Applicant: KOMATSU MFG CO LTD

Inventor： MATSUDA KAZUO ,  INABA NOBUAKI ,  KAMINISHI MASASHI ,  FUNABASHI TETSUJI ,  TANAKA NOBUKAZU

IPC: B29C45/23 ,  B29C45/50 ,  B29C45/57 ,  B29C45/76 ,  B29C45/77

CPC classification number: B29C45/76 ,  B29C45/23

Abstract: An injection molding machine which enables the control of the flow rate and speed of molten resins injected from an injection nozzle without a time-lag after the detection of the position of an injection screw and makes possible the control of injection speeds with excellent responsiveness, rapidity, and high accuracy. One rotary nozzle valve (22) for controlling the flow rate of molten resins flowing from an injection screw (2) toward an injection nozzle (12) is provided between one injection screw (2) provided rotatably and movably in a forward and backward direction in a housing (1) and one injection nozzle (12) which is provided at the front end of the housing (1) and injects molten resins into a cavity (14) of a mold (13), where said rotary nozzle valve (22) controls the flow rate and speed of molten resins, cooperating with an injection speed control device and a pressure control device which are provided separately.

公开(公告)号：EP0310914A2

公开(公告)日：1989-04-12

申请号：EP88115870.3

申请日：1988-09-27

Applicant: Battenfeld GmbH

Inventor： Eckardt, Helmut, Dipl.-Ing. ,  Ehritt, Jürgen

IPC: B29C45/77 ,  B29C45/57 ,  B29C45/16

CPC classification number: B29C45/1606 ,  B29C45/1732 ,  B29C45/1735 ,  B29K2995/0063

Abstract: Es wird ein Verfahren zum Spritzgießen von Hohlkörper-Form­teilen aus thermoplastischen Kunststoffen vorgeschlagen, bei welchem zunächst eine zur Ausbildung des Formteiles ausrei­chende Menge des schmelzflüssigen Kunststoffs in die Spritz­form gedrückt wird. Dann wird in die Spritzform und/oder den thermoplastischen Kunststoff ein strömungsfähiges Medium, insbesondere Gas, mit einem Druck eingepreßt, der die Kunst­stoffmasse gleichmäßig über die Oberfläche des Formhohlraums unter Bildung eines Hohlkörpers verteilt. Daraufhin wird der unter Mediendruck gehaltene Hohlkörper in der Spritzform abgekühlt. Schließlich wird der Mediendruck aus dem Hohlkör­per abgelassen und dann das Formteil entformt sowie aus der Spritzfrom entnommen. Wesentlich ist dabei, daß der Medien­druck innerhalb der Spritzform bzw. auf die über die Oberflä­che des Formhohlraums verteilte Kunststoffmasse bis zu deren Abkühlung zumindest zweitweilig variiert wird, und zwar nach einem für das jeweilige Formteil und/oder Kunststoffmaterial vorgegebenen Druckprofil geregelt und/oder gesteuert wird.

Abstract translation: 一种方法是由热塑性树脂，其中首先被压入注模达熔融树脂足以形成该部件的建议的注射成型中空成型部件。 然后，将可流动的介质，特别是气体，被强迫进入注射模具和/或在其中的模腔的表面上均匀地分布在树脂化合物的压力的热塑性树脂，形成中空制品。 那里之后，中空制品在注射模具中冷却，同时保持所述介质的压力下。 最后，将中空制品被解除的介质的压力，然后将所形成的部分被释放，并且从注射模具中取出。 什么是必要这里是没有在注射模具内的介质的压力，或者在分布在模腔的表面上的树脂化合物，是变化至少为它的冷却过程中的时间，是通过闭环和/精确 或开环控制gemäß为respectivement指定的压力分布形成的部件和/或树脂材料。

公开(公告)号：EP0299085A1

公开(公告)日：1989-01-18

申请号：EP88901303.3

申请日：1988-01-29

Applicant: SUMITOMO HEAVY INDUSTRIES, LTD

Inventor： HARA, H. Sumitomo Heavy Industries, Ltd.

IPC: B29C45/77 ,  B29C45/57 ,  B29C45/50

CPC classification number: B29C45/77

Abstract: n a pressure setting method which is used for an injection molding machine equipped with a mold, an injection unit and a control unit and which sets and controls a series of pressures required at the start of injection of a resin to the mold and a dwelling step through a fitting step, the method of the present invention sets sequentially the series of pressures described above in accordance with a time-injection pressure characteristic curve that is determined under the condition that the volume of the resin inside the mold at the dwelling step is substantially constant, and changes locally the dwelling stop of the characteristic curve in accordance with a mold to be obtained. The characteristic curve provides an exponential curve at the dwelling step and the local change- described above is carried out pulse-wise so that the characteristic curve becomes discontinuous. In this matter, the pressure values can be set in accordance with the shape and thickness of the resulting mold. To obtain such pressure values, the control unit includes a function generator to which parameters at each step are applied, and a signal generator for applying the pulse is connected to this function generator.

Abstract translation: 在用于配备有模具，注射单元和控制单元的注射成型机的压力设定方法中，其设定和控制开始向模具注入树脂所需的一系列压力和通过 填充步骤，该方法根据在下述条件下确定的时间注射压力特性曲线依次设定上述一系列压力。 在模具中的树脂在固定步骤中是恒定的，并且根据要获得的模具局部地改变特性曲线的停留。 特征曲线在住宅步骤中提供指数曲线，并且以脉冲方式执行上述局部变化，使得特征曲线变得不连续。 可以根据所得模具的形状和厚度设定压力值。 为了获得这样的压力值，控制单元包括函数发生器，每个步骤的参数被施加到该函数发生器，并且用于施加脉冲的信号发生器连接到该函数发生器。