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US 2023/0264402 A1Published application
Control device for injection molding machine and control method for injection molding machine
AssigneeFanuc Corporation
InventorsRyou OOSAKA, Atsushi HORIUCHI
Life of this patent
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Abstract
A control device for an injection molding machine includes: a pressure acquiring unit for acquiring resin pressure; an injection control unit for injecting resin into a mold; an ejector control unit for protruding an ejector pin before the resin pressure reaches a predetermined target pressure; and an insertion control unit for causing a supporting member and an attachment plate to support an ejector plate by inserting the supporting member into a gap before the resin pressure reached the predetermined target pressure.
Claims12
A control device for an injection molding machine,
- wherein the injection molding machine includes:
- a movable platen configured to move in an opening/closing direction of a mold;
- a mounting plate provided on a side of the mold of the movable platen;
- a spacer configured to connect the mold and the mounting plate in a manner so that the mold is opened and closed accompanying movement of the movable platen in the opening/closing direction, the spacer forming an ejector movable space between the mold and the mounting plate;
- an ejector plate provided in the ejector movable space, and configured to advance and retract toward and from the mold;
- an ejector pin (44) provided on the ejector plate, and configured to project out toward the mold;
- a support member configured to be inserted into and removed from a gap formed between the mounting plate and the ejector plate that has advanced;
- and
- an injection unit configured to inject a resin that has been plasticized,
- the control device for the injection molding machine comprising:
- a pressure acquisition unit configured to acquire a resin pressure inside the mold;
- an injection control unit configured to control the injection unit to thereby inject the resin into an interior of the mold that has been closed, and cause the resin pressure to reach a predetermined target pressure;
- an ejector control unit configured to cause the ejector plate to advance prior to the resin pressure reaching the predetermined target pressure, to thereby project the ejector pin into the interior of the mold and impart at least one of a concave portion or a hole portion to a shape of the resin inside the mold;
- and
- an insertion control unit (68)-configured to insert the support member into the gap prior to the resin pressure reaching the predetermined target pressure, to thereby cause the ejector plate that receives the resin pressure to be supported by the support member and the mounting plate.
12 more elements
A control method for an injection molding machine,
- wherein the injection molding machine includes:
- a movable platen configured to move in an opening/closing direction of a mold;
- a mounting plate provided on a side of the mold of the movable platen;
- a spacer configured to connect the mold and the mounting plate in a manner so that the mold is opened and closed accompanying movement of the movable platen in the opening/closing direction, the spacer forming an ejector movable space between the mold and the mounting plate;
- an ejector plate provided in the ejector movable space, and configured to advance and retract toward and from the mold;
- an ejector pin provided on the ejector plate, and configured to project out toward the mold;
- a support member configured to be inserted into and removed from a gap formed between the mounting plate and the ejector plate that has advanced;
- and
- an injection unit configured to inject a resin that has been plasticized,
- the control method for the injection molding machine comprising:
- an injection control step of controlling the injection unit to thereby inject the resin into an interior of the mold that has been closed;
- an ejector advancing step of, after the injection control step is started, causing the ejector plate to advance to thereby project the ejector pin into the interior of the mold and impart at least one of a concave portion or a hole portion to a shape of the resin inside the mold;
- an insertion control step of inserting the support member into the gap after the ejector advancing step is started;
- and
- a pressure maintaining control step of, after the insertion control step is started, causing a resin pressure inside the mold to reach a predetermined target pressure while the ejector plate is supported by the support member and the mounting plate.
12 more elements
Dependencies are inferred from the claim text.