Control device for the motor for the forward and backward movement of the nozzle of the injection molding machine
An injection molding machine, forward and backward technology, which is applied in the field of the control device of the motor for the forward and backward of the nozzle, can solve the problems of reduced productivity and prolonged cycle time, and achieves the effect of not prolonging the cycle time and preventing collapse
Active Publication Date: 2014-10-01
FANUC LTD
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Problems solved by technology
[0006] Therefore, it is an object of the present invention to provide a control device for a nozzle forward and backward motor of an injection molding machine that divides the nozzle forward process into a process (1) until the nozzle comes into contact with the mold, and a process (1) from after the nozzle contacts the mold until a predetermined time occurs. The process (2) of the nozzle contact force is performed by synchronizing the above-mentioned process (1) with the process (1') until reaching the mold contact position in the mold closing process, and making the above-mentioned process (2) and the process from reaching the mold contact position to The process (2') at the end of mold clamping operates synchronously to solve the problem of prolonged cycle time and reduced productivity
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[0017] The control device of the nozzle forward and backward servo motor according to the present invention is suitable for an injection molding machine having a mold clamping mechanism having a mold opening and closing servo motor and a nozzle forward and backward servo motor. figure 1 It is a figure explaining the schematic structure of the control apparatus of the servomotor for nozzle advance and retreat of the injection molding machine of this invention.
[0018] Injection molding machine M is on machine M 3 There is a clamping part M 1 and injection department M 2 . Injection Department M 2 The resin material (pellet) is melted by heating, and the molten resin is injected into the cavity of the mold 46 . The screw 3 is inserted into the injection cylinder 1 . A hopper 4 for supplying a resin material (not shown) into the injection cylinder 1 is attached to the side of the injection cylinder 1 .
[0019] First, the mold clamping part M will be described 1 . Clampi...
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The invention provides a control device of a motor which is used for moving a nozzle of an electric injection molding machine forward and backward. The nozzle of an injection part of the electric injection molding machine is moved forward by the control device of a servo motor. A first servo motor is used to perform a mold closing operation to a position at which a moving-side mold touches a fixed-side mold. In one aspect, the nozzle is moved forward by a second servo motor in a manner that the nozzle of the injection part may touch with a mold as the molds contact with each other. Then, the mold closing operation is performed from the position at which the moving-side mold touches the fixed-side mold to a mold closing complete position. In another aspect, the nozzle is moved forward by the second servo motor in a manner that a preset nuzzle contact force is generated as the mold closing operation is completed.
Description
technical field [0001] The present invention relates to a control device for a motor for advancing and retreating a nozzle of an injection molding machine. Background technique [0002] The injection molding machine has a clamping unit and an injection unit. During normal injection molding operations other than resin ejection, a state in which the nozzle of the injection part is in contact with the fixed side mold is generally maintained, and a predetermined nozzle contact force is generated against the mold. However, if the continuous molding operation is performed with the nozzle in contact with the mold, the heat at the tip of the nozzle is taken away by the mold. Therefore, after the metering process is completed, the nozzle is detached from the mold to prevent the heat at the tip of the nozzle from being taken away by the mold. This action is called sprue break. The sprue separation also has the effect of cutting the sprue between the nozzle and the mold due to the re...
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IPC IPC(8): B29C45/76B29C45/80
CPCB29C2945/76006B29C2945/7623B29C2945/76939B29C2945/76391B29C2945/76933B29C45/76B29C45/80B29C2945/7621
Inventor 内山辰宏
Owner FANUC LTD