JP2007210347A - Injection molding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an injection molding machine capable of protecting against an accidental handling by an operator so as to keep the molding equipment to be free from damage. <P>SOLUTION: The injection molding machine is constituted to call the operator for attention on work during a series of multiple operations between die exchange and start-up of the first molding. It is equipped with: a plurality of sensing means 52, which are arranged to address a plurality of operations on the injection molding machine and detect conditions of respective operations by the injection molding machine; a controller 27 to receive each detection signal generated by each sensing means 52; and a display unit to receive a status signal generated by the controller 27. The controller 27 is equipped with a display means 53 which sends the status signal corresponding to each detection signal and displays on the display unit calling for attention. Accidental handling of an injection molding machine 11 by the operator can be avoided since an attention calling display can be staged. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an injection molding machine.

  Conventionally, an injection molding machine has an injection device, and a screw is disposed in a heating cylinder of the injection device so as to be rotatable and movable back and forth, and the screw is rotated by a driving means or moved back and forth. Can be done. Then, during the metering process, the screw is moved backward while rotating forward, the resin supplied from the hopper into the heating cylinder is heated and melted and stored in front of the screw head, and the screw is advanced and injected during the injection process. Resin melted from the nozzle, that is, molten resin is injected.

  A mold apparatus is disposed in front of the injection apparatus. The mold apparatus includes a fixed platen, a movable platen, a fixed mold, a movable mold, and a mold clamping device. The movable platen is advanced and retracted by the mold clamping device, and the movable mold is moved toward and away from the fixed mold. By doing so, mold closing, mold clamping and mold opening can be performed.

  By the way, during injection molding, an operation of attaching and removing the fixed mold and the movable mold to and from the fixed platen and the movable platen (hereinafter referred to as “mold replacement”) and adjustment of the operation of the mold apparatus, respectively. It is necessary to perform operations such as temperature control of the mold apparatus, heating of the heating cylinder, and charging of resin into the hopper.

  During preparation for injection molding, the temperature of the mold unit is raised, purge is performed, resin is changed, color is changed, the resin staying in the heating cylinder is discharged, molding conditions suitable for the mold unit are set, and molding is performed. It is necessary to perform operations such as startup.

  However, in the conventional injection molding machine, since the operator performs various operations, the mold apparatus may be damaged if the operator performs the operation of the injection molding machine by mistake. is there.

  The present invention solves the problems of the conventional injection molding machine, can prevent an operator from mistakenly performing the work of the injection molding machine, and does not damage the mold apparatus. The purpose is to provide.

  Therefore, in the injection molding machine of the present invention, the operator is alerted during the series of operations from the mold replacement to the first molding start-up.

  And it is arranged in the injection molding machine corresponding to the plurality of operations, receives a plurality of detection means for detecting the state of each operation of the injection molding machine, and each detection signal generated by each detection means. A control unit; and a display unit that receives a display signal generated by the control unit.

  Further, the control device includes display means for sending a display signal corresponding to each of the detection signals to the display unit and performing a display for calling attention to the display unit.

  According to the present invention, in the injection molding machine, the operator is alerted during a series of operations from the mold replacement to the first molding start-up.

  And it is arranged in the injection molding machine corresponding to the plurality of operations, receives a plurality of detection means for detecting the state of each operation of the injection molding machine, and each detection signal generated by each detection means. A control unit; and a display unit that receives a display signal generated by the control unit.

  Further, the control device includes display means for sending a display signal corresponding to each of the detection signals to the display unit and performing a display for calling attention to the display unit.

  In this case, if there is a possibility that the operator may handle the injection molding machine by mistake, it is possible to perform a display to alert the display means so that the operator can be prevented from handling the injection molding machine by mistake. And the mold apparatus will not be damaged.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram of a warning device for an injection molding machine according to an embodiment of the present invention, and FIG. 2 is a perspective view of the injection molding machine according to an embodiment of the present invention.

  In the figure, 11 is an injection molding machine, and 12 is an injection device. A screw (not shown) is rotatably and reciprocally disposed in a heating cylinder 13 of the injection device 12. The screw is driven by a driving means 14. It can be rotated and moved back and forth. Then, during the metering process, the screw is moved backward while being rotated forward, the resin supplied from the hopper 17 into the heating cylinder 13 is heated and melted, and stored in front of a screw head (not shown). The molten resin is injected from an injection nozzle (not shown) by being advanced.

  A mold device 21 is disposed in front of the injection device 12 (left side in FIG. 2). The mold apparatus 21 includes a fixed platen 23, a movable platen 24, a fixed mold (not shown) attached to the fixed platen 23, a movable mold (not shown) attached to the movable platen 24, and a mold clamping device 25. The mold clamping device 25 moves the movable platen 24 back and forth so that the movable mold is brought into and out of contact with the fixed mold, whereby the mold can be closed, clamped and opened.

  A frame 30 is disposed below the injection device 12, and a control panel 31 is disposed in front of the frame 30. The control panel 31 is provided with an input keyboard 32 for an operator to set molding conditions and the like, and a display screen (CRT) 33 as a display unit for displaying the molding conditions and the like. . When the control device 27 is disposed and the operator operates the operation unit 28 and the keyboard 32, the control device 27 generates a predetermined signal, and the injection device 12 and the mold device 21 are operated. Therefore, the control device 27 operates the injection device 12 and the mold device 21 based on the molding conditions set by the operator operating the keyboard 32, and performs injection molding.

  By the way, during injection molding, it is necessary to perform operations such as mold replacement, adjustment of the operation of the mold apparatus 21, temperature control of the mold apparatus 21, heating of the heating cylinder 13, and introduction of resin into the hopper 17. There is.

  Further, during the preparation for injection molding, the temperature of the mold device 21 is increased, the purge is performed, the resin is changed, the color is changed, the resin staying in the heating cylinder 13 is discharged, and the molding conditions suitable for the mold device 21 are set. It is necessary to perform operations such as start-up of molding.

  However, if the operator changes the mold and attaches a new fixed mold and movable mold to the fixed platen 23 and the movable platen 24, respectively, and forgets to change the setting of molding conditions, Ten) (overpack), short shots, etc. occur and the mold apparatus 21 is damaged, or errors occur in the mold opening / closing speed, mold opening stroke, etc., and the mold apparatus 21 is galling, not shown 3 The plate link is broken.

  Further, if forgetting to perform purging due to resin change, color change, etc., the molten resin staying in the heating cylinder 13 deteriorates and is decomposed. As a result, if injection is performed without changing the settings of the injection pressure and the injection speed, overfilling occurs and the mold apparatus 21 is damaged.

  Furthermore, depending on the type of the mold apparatus 21, the mold temperature, the molding state, etc. become unstable at the start of the first molding, so overmolding occurs if molding is performed under the first molding conditions. May end up.

  Therefore, in the present embodiment, a detection means 52 including a switch or the like is provided on the fixed platen 23 and the movable platen 24 in order to detect the handling of the injection molding machine 11 by an operator, and is generated by the detection means 52. The detected signal is sent to the control device 27. Then, the display means 53 of the control device 27 generates a display signal based on the detection signal and sends the display signal to the display screen 33. The display screen 33 pays attention to the operator based on the display signal. The display is aroused. Thereafter, when an operator who has been cautioned properly handles the injection molding machine 11, the control device 27 is based on the control signals from the injection device 12 and the mold device 21 and the signals from the operation unit 28 and the keyboard 32. The canceling means 54 cancels the display on the display screen 33.

  Next, an example of an operation for alerting an operator in the injection molding machine having the above configuration will be described.

  First, in order for the operator to replace the mold, when the fixed mold and the movable mold are respectively removed from the fixed platen 23 and the movable platen 24 and new fixed molds and movable molds are respectively attached, the detection means 52 Detects it. Then, when the detection signal is sent to the control device 27, the display means 53 of the control device 27 activates the display screen 33 to pay attention to whether or not the molding conditions are compatible with the new fixed mold and movable mold. Display a reminder. In this embodiment, the detection means 52 including a switch or the like detects that the mold has been exchanged. However, the fact that the mold has been exchanged by turning on the power (not shown). It is also possible to detect that the mold has been exchanged by adjusting the mold thickness.

  Next, when it is detected that the mold has been changed, the mold opening force is automatically reduced (for example, 30% or less) during preparation for injection molding. In this case, when the mold is opened for the first time, if the mold is not opened to the mold opening limit during preparation for injection molding, operation in other modes (manual, semi-automatic and fully automatic) is disabled and displayed. On the screen 33, a message such as “Check that there is no foreign matter remaining in the mold opening stroke and mold” is displayed.

  If the mold is not exchanged, the display can be canceled by using an on / off key set in the display screen 33.

  If the injection molding is not started even after a set time (for example, 5 minutes) has elapsed after the temperature rise of the mold apparatus 21 is completed, “please purge” on the display screen 33 or the like. Display is performed. In this case, when a set time (for example, 30 minutes) elapses, the temperature of the heating cylinder 13 is automatically lowered.

  Thereafter, at the start of the first molding, the molding conditions are automatically changed, the metering stroke is shortened, the pressure is lowered, and injection molding is performed. In the second and subsequent molding start-up, normal molding conditions are automatically set. It is also possible to turn on / off the mode for changing the molding conditions at the start of the first molding.

  In this way, when the operator performs a series of operations, if there is a possibility that the injection molding machine 11 may be handled incorrectly, the display screen 33 can be displayed to alert the operator, so that the operator can perform injection molding. The machine 11 can be prevented from being handled by mistake, and the mold apparatus 21 is not damaged.

  Further, the controller 27 is provided with a release means 54 for releasing the display when the operator correctly handles the injection molding machine 11 after being alerted. There is no need to operate the keyboard 32 or the like to cancel the operation, and the work efficiency can be improved.

  In the present embodiment, attention is drawn by displaying on the display screen 33, but attention can also be drawn by sound output from a speaker or the like, or light output from a display lamp or the like.

  In addition, this invention is not limited to the said embodiment, It can change variously based on the meaning of this invention, and does not exclude them from the scope of the present invention.

It is a block diagram of the alerting device of the injection molding machine in the embodiment of the present invention. 1 is a perspective view of an injection molding machine in an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Injection molding machine 12 Injection apparatus 21 Mold apparatus 27 Control apparatus 28 Operation part 33 Display screen 52 Detection means 53 Display means 54 Release means

Claims (7)

In an injection molding machine that alerts workers to work during multiple series of operations from mold replacement to the first molding start-up,
(A) a plurality of detection means disposed in an injection molding machine corresponding to the plurality of operations, and detecting a state of each operation of the injection molding machine;
(B) a control device that receives each detection signal generated by each detection means;
(C) having a display unit for receiving a display signal generated by the control device;
(D) An injection molding machine, wherein the control device includes display means for sending a display signal corresponding to each of the detection signals to the display unit and performing display for calling attention to the display unit. (A) The detection means detects that the operator has removed the fixed mold and the movable mold from the fixed platen and the movable platen, respectively, and has performed an operation of attaching a new fixed mold and a movable mold, respectively.
(B) The control device cancels the display on the display unit based on the control signal from the mold device and the signal from the operation unit when the operator who has been cautioned performs the work correctly. An injection molding machine according to claim 1.   2. The injection molding machine according to claim 1, wherein the display means generates the display signal for alerting an operator as to whether or not the molding conditions are suitable for a new fixed mold and a movable mold.   2. The injection molding machine according to claim 1, wherein when the detection unit detects that the mold has been changed, the mold opening force by the mold clamping device during preparation for injection molding is reduced.   2. The injection molding machine according to claim 1, wherein when the first mold opening is performed, the operation in another mode is disabled unless the mold opening is always performed up to a mold opening limit during preparation for injection molding.   2. The injection according to claim 1, wherein the temperature of the heating cylinder is automatically lowered when the set time elapses when the injection molding is not started after the set time elapses after the temperature rise of the mold apparatus is finished. Molding machine.   2. The injection molding machine according to claim 1, wherein at the time of starting the first molding, the molding conditions are automatically changed, the measuring stroke is shortened, the pressure is lowered, and the injection molding is performed.

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