Injection molding machine, plasticizing movement device, and nozzle touch method
An injection molding machine and injection device technology, applied in the field of injection molding machines, can solve the problems of short spring life, ball screw shaft wear life, poor responsiveness, etc., and achieve the effect of long action life
Active Publication Date: 2007-10-24
SUMITOMO HEAVY IND LTD
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Problems solved by technology
Therefore, since the ball nut repeatedly reciprocates at a certain position on the ball screw shaft, there is a problem that the ball screw shaft is locally greatly worn and the service life is shortened.
[0016] In addition, since the drive mechanism of the ball screw utilizes the compression of the spring, the responsiveness is poor, and the nozzle contact pressure cannot be greatly changed in a short time.
In addition, it is difficult to precisely control the elastic deformation force of the spring, and it is impossible to change the nozzle contact pressure in a short time with high precision.
Furthermore, since the spring is repeatedly compressed, there is a problem that the life of the spring is short
Method used
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[0107] Next, embodiments of the present invention will be described with reference to the drawings.
[0108] First, as a device to which the present invention can be applied, an injection molding machine will be described with reference to FIG. 1 . FIG. 1 is an overall configuration diagram of an injection molding machine.
[0109] The injection molding machine shown in FIG. 1 includes a molding machine frame 50 , an injection device 60 , and a mold clamping device 80 arranged to face the injection device 60 . The injection machine 60 and the mold clamping device 80 are arranged on the molding machine frame 50 . In the mold clamping device 80, a metal mold device composed of a movable mold 81 and a fixed mold 83 is attached.
[0110] The injection device 60 includes a heating cylinder 61 , and a raw material hopper 62 for injecting raw resin such as resin pellets into the heating cylinder 61 is attached to the heating cylinder 61 . Inside the heating cylinder 61, a screw 63...
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An injection molding machine in which an oil-hydraulic actuator and an oil-hydraulic pump unit are arranged close to each other to make oil-hydraulic piping as short as possible, in which maintainability is improved, and in which reliability of a hydraulic drive section is enhanced. An injection molding machine has one movable section constructed so as to be movable relative to a body frame. A hydraulic actuator and a hydraulic pump unit are fixed to the movable section. The hydraulic pump unit produces hydraulic pressure to supply it to the hydraulic actuator. The hydraulic pump unit and the hydraulic actuator are connected by a hydraulic path provided at the movable section. The hydraulic pump unit, the hydraulic actuator, and the hydraulic path move as the movable section moves.
Description
technical field [0001] The present invention relates to an injection molding machine, and more particularly, to an injection molding machine having a hydraulic actuator that drives a movable part by hydraulic pressure. Background technique [0002] Conventionally, a hydraulic cylinder has been used as a driver for driving a movable part of a molding machine such as an injection molding machine. In the injection molding machine, a driver for moving the injection device, a driver for driving the mold clamping device, and the like are incorporated. A hydraulic cylinder is used as such an actuator. [0003] An injection molding machine has also been developed that uses an electric drive including an electric motor and a rotation / reciprocation conversion mechanism instead of a hydraulic cylinder. However, there is also a demand to use a hydraulic actuator in order to take advantage of the hydraulic drive that is compact and capable of obtaining a large thrust and the like. [...
Claims
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IPC IPC(8): B29C45/82B29C45/17
CPCB29C2945/76846B29C2945/76006B29C45/681B29C2945/76785B29C45/82B29C45/67B29C2945/76545B29C2945/76892B29C2945/76862B29C2945/76829B29C2945/76695B29C45/1777B29C45/17
Inventor 早川真博小坂光洋
Owner SUMITOMO HEAVY IND LTD