JP4799156B2 - Molding machine - Google Patents

Description

  The present invention relates to a molding machine such as an injection molding machine or a die casting machine, and more particularly to a technique related to a mold thickness adjustment operation.

  In a molding machine such as an injection molding machine, when a mold is replaced, a mold thickness adjustment (die height adjustment) is performed according to the thickness of the newly installed mold, and after the mold thickness adjustment, a predetermined value is set during molding operation. Automatic tightening is performed to generate the mold clamping force.

  Die thickness adjustment is to adjust the position of the tail stock with respect to the tie bar spanned between the fixed die plate with the fixed side mold and the tail stock equipped with the mold opening / closing drive source (clamp drive source). (Adjusting the position of the tail stock with respect to the tie bar having one end fixed to the fixed die plate fixed, in other words, adjusting the position of the tail stock with respect to the fixed die plate fixed). That is, a nut body with a pulley or a nut body with a gear rotatably held on a tailstock is screwed into a screw portion formed at an end of the tie bar, and a nut body with a pulley or a nut body with a gear is By rotating and driving with a mold thickness adjustment motor mounted on the tailstock, the nut body with pulley or the nut body with gear moves forward and backward on the screw shaft, and the tailstock is moved together with the nut body with pulley or nut body with gear. It is done by moving. When adjusting the mold thickness, the movable die plate that is located between the tail stock and the fixed die plate and to which the movable mold is attached is connected to the tail stock, for example, via a toggle link mechanism in a folded state. Then, the movable die plate is moved forward or backward by a predetermined amount together with the tail stock, and the mold thickness adjusting motor is temporarily stopped. Next, the toggle link mechanism is extended and driven by a mold opening / closing drive source to advance the movable die plate relative to the tailstock, and thereby the movable die of the movable die plate and the fixed die of the fixed die plate are In this state, the mold thickness is adjusted by moving the movable die plate together with the tailstock by a predetermined amount by the mold thickness adjusting motor and touching the movable mold and the fixed mold. Adjustments are made.

  When the mold thickness adjustment is completed, the toggle link mechanism is folded and driven by a certain amount by the mold opening / closing drive source, and then the movable die plate is moved together with the tail stock by the mold thickness adjusting motor by a predetermined amount (the set mold clamping is set). Automatic retightening is performed, moving forward (by an amount commensurate with the force). As a result, when the toggle link mechanism is fully extended, a tensile force acts on the tie bar and the tie bar is stretched, and the mold set to the mold is set by the elastic restoring force of the stretched tie bar. The tightening force will act.

  The above-described mold thickness adjustment and automatic tightening are generally known in the field of molding machines and are obvious to those skilled in the art. Note that the posture of the toggle link mechanism taken in the process of adjusting the mold thickness may differ depending on the molding machine manufacturer.

By the way, the operation mode of the molding machine is usually provided with an exchange mode. When an operator ( operator ) selects this exchange mode, each part of the molding machine is manually operated by the operator and is slowly operated for safety. It is not only selected at the time of mold replacement, but also frequently used for various adjustments and operation checks. For example, when the exchange mode is set, the manual thickness key can be used to move the mold thickness forward and backward, as well as low and low pressure mold opening and closing, low speed screw back and forth, low speed eject back and forth, automatic Operations such as purging can also be performed.

  When the above replacement mode is selected, the mold thickness adjustment can be performed by operating the mold thickness advance key or mold thickness reverse key after the mold replacement, regardless of whether the mold thickness adjustment and automatic tightening have already been completed. Was supposed to be executed. For this reason, if the mold thickness advance key or mold thickness reverse key is inadvertently operated even after automatic retightening has been completed, the mold thickness adjustment state will be distorted and the expected mold clamping force will be lost. Invite the situation that the mold clamping force is not set.

  Also, in the conventional molding machine, regardless of whether or not the automatic tightening is completed, the operation mode of the molding machine is selected as the fully automatic mode (full automatic molding operation mode) and the fully automatic molding operation is started. Is instructed to start a fully automatic molding operation. For this reason, when the automatic tightening is not finished, if the operation is inadvertently instructed to start the operation in the fully automatic mode, the molding operation is performed without the mold clamping force being generated, and the mold release surface This has led to a situation where resin leaks from the product and molded products of poor quality are formed.

The problem as described above, for example, operator A performs the die replacement not convey enough of whether the operator B has been adjusted due to mold exchange far, the operation is the operator B of the molding machine on behalf of the operator A This can happen when, for example,

  The present invention has been made in view of the above points, and an object of the present invention is to prevent a mold thickness adjustment operation from being performed carelessly after automatic tightening is completed. Further, when automatic retightening is not completed, it is to prevent a fully automatic molding operation from being performed.

In order to achieve the above-mentioned object, the present invention can adjust the mold thickness by a command to move the mold thickness , and can set the mold clamping force by an automatic tightening command after inputting the numerical value of the mold clamping force . the enable / disable button for enabling / disabling the execution of the mold thickness adjustment, is provided in a predetermined display mode image, the control unit of the molding machine, when the enable / disable button is in the disabled state, the mold In a molding machine that performs control so as not to accept a thickness adjustment operation , the control means performs the permission / prohibition after the end of automatic tightening regardless of the setting state of the permission / prohibition button before the end of automatic tightening. The button setting state is automatically set to the prohibition state, and if the setting state of the permission / prohibition button is the prohibition state before the end of the automatic tightening, the fully automatic operation is executed before the end of the automatic tightening. Prohibit fully automatic operation even when commanded It is characterized in.

  According to the present invention, a permission / prohibition button for permitting / prohibiting execution of mold thickness adjustment is provided in a predetermined display mode image, and when this permission / prohibition button is in a prohibited state, Since the control means does not accept mold thickness adjustment operations, if the permit / prohibit button is disabled, the change mode is selected and the mold thickness advance key or mold thickness retract key is inadvertently operated. Even if it does, since mold thickness adjustment is not performed, there is no possibility that the set clamping force will go wrong. Even before or during the mold thickness adjustment, or even if the mold thickness adjustment has been completed but automatic tightening has not been completed, the operator must By operating the permission / prohibition button to place it in the prohibited state, even if another unfamiliar operator or the like performs the mold thickness adjustment operation, the mold thickness adjustment operation can be prohibited. In addition, by automatically disabling the permit / prohibit button after the completion of automatic tightening, the thickness adjustment after completion of automatic tightening is prohibited without making the operator aware of the operation of the permit / prohibit button. Can do. Furthermore, when the operator leaves the molding machine in an unfinished state, the operator operates the allow / prohibit button to place it in a prohibited state, so that other operators are inadvertently moved. Even if the start of the automatic molding operation is instructed, the fully automatic molding operation can be prohibited.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 5 relate to an injection molding machine according to an embodiment of the present invention (hereinafter referred to as the present embodiment), and FIG. 1 is a block diagram showing a main configuration of a control system of the injection molding machine of the present embodiment. FIG.

  In FIG. 1, 1 is a main control unit that controls the entire injection molding machine, and 2 is an input unit that is connected to the main control device 1 and includes a key input unit and a touch panel of a display unit 3 with a touch panel. The input operation unit 4 is a mold thickness adjustment control unit connected to the main control device 1, 5 is an automatic tightening control unit connected to the main control device 1, and 6 is connected to the main control device 1. The fully automatic operation control unit 7 is a display control unit connected to the main control device 1, 3 is a display unit connected to the display control unit 7, and 8 is connected to the main control device 1 to adjust the mold thickness. This is a permission / prohibition setting unit for setting a permission / prohibition state of a permission / prohibition button, which will be described later, for permitting / prohibiting execution.

  The mold thickness adjustment control unit 4, the automatic tightening control unit 5, and the fully automatic operation control unit 6 each set an appropriate drive source based on a command from the main control unit 1 based on an operation signal from the input operation unit 2 by the operator. Drive control is performed for mold thickness adjustment operation control, automatic tightening operation control, and fully automatic molding operation control. The display control unit 7 displays images of various display modes based on a command from the main control unit 1 based on an operation signal from the input operation unit 2 by an operator or a command from the main control unit 1 based on a judgment of the main control unit 1 itself. It is generated and displayed on the display unit 3.

  The permission / prohibition setting unit 8 sets and stores the setting state of the permission / prohibition button in the mold thickness mode image (mold thickness screen) to be described later displayed on the display unit 3, that is, the permission state or the prohibition state. The allow / prohibit button is operated by the operator (manual operation), and changes from the permitted state to the prohibited state, or from the prohibited state to the permitted state, and is recognized when the automatic tightening is completed. In response to a command from the main control unit 6, the prohibited state is set.

  FIG. 2 is a diagram illustrating the configuration of the input operation unit 2 and the display unit 3 in the injection molding machine according to the present embodiment. In this embodiment, the input operation unit 2 and the display unit 3 are integrated, and the input operation unit 2 includes a lower key operation unit 2a in FIG. 2 and an upper touch panel in FIG. The touch panel input unit 2b of the display unit 3 is included.

  The key operation unit 2a includes a plurality of screen switching keys 11, a plurality of operation mode selection keys 12, a plurality of numerical keys 13, a plurality of condition setting keys 14, a plurality of manual operation keys 15, and a plurality of option keys 16. It has been.

  Each screen switching key 11 is associated with a plurality of display mode images (display mode screens), and by touching an arbitrary screen switching key 11, one display mode corresponding to the screen switching key 11 is displayed. When an image is displayed on the display unit 3 and the same screen switching key 11 is touched again, the next one display mode image corresponding to the screen switching key 11 is displayed on the display unit 3. When the same screen switching key 11 is touched several times, the display mode image displayed first is returned.

  In this embodiment, when the “setup” screen switching key 11 is touched a predetermined number of times, a mold thickness mode image (mold thickness screen) as shown in FIG. 3 is displayed on the display unit 3. The mold thickness mode image (mold thickness screen) is provided with a permission / prohibition button (on / off operation display button for setting permission / prohibition) 21 for permitting / prohibiting execution of mold thickness adjustment. When the permit / prohibit button 21 is touched by the operator, a permission state (an ON state that is a display state of “L”) and a prohibition state (an OFF state that is a display state in which nothing is displayed) Can be arbitrarily selected and set, and this permission state or prohibition state is set in the permission / prohibition setting unit 8 by the main control unit 1. Further, after the mold thickness is adjusted, the automatic tightening control unit 5 executes the automatic tightening, and the main control unit 1 recognizes that the automatic tightening control unit 5 recognizes the completion of the automatic tightening. The main control unit 1 automatically sets the setting state of the permission / prohibition button 21 to the prohibition state (changes to the prohibition state when in the permission state and maintains the prohibition state when in the prohibition state). The setting state of the permission / prohibition setting unit 8 is automatically set to the prohibition state (when in the permission state, the state is shifted to the prohibition state, and when in the prohibition state, the prohibition state is maintained. It has become).

  When the permission / prohibition button 21 is in the permitted state, the “replacement” operation mode selection key 12 shown in FIG. 2 is touched to cause the injection molding machine to enter the replacement mode. The mold thickness adjustment operation based on the control by the mold thickness adjustment control unit 4 is executed by touching the manual operation key 15 for “mould thickness retraction” or the manual operation key 15 for “mould thickness advance” shown in FIG. It is like that. When the permission / prohibition button 21 is in the prohibited state, the operation mode selection key 12 for “replacement” shown in FIG. 2 is touched to cause the injection molding machine to enter the replacement mode. The main control unit 1 does not operate the mold thickness adjustment control unit 4 even if the “mold thickness reverse” manual operation key 15 or the “mold thickness advance” manual operation key 15 shown in FIG. Yes. Further, when the permission / prohibition button 21 is in the prohibited state and the automatic tightening is not completed, the main control unit 1 does not operate even if the start of the fully automatic molding operation is instructed. The control unit 6 is not allowed to work.

  After completion of the mold thickness adjustment, a numerical value of the mold clamping force is entered into the mold clamping force setting field 22 in the mold thickness mode image (mold thickness screen) shown in FIG. When an “automatic tightening” start button 23 shown in FIG. 3 is touched, an automatic tightening operation based on control by the automatic tightening control unit 5 is executed based on a command from the main control unit 1.

  In FIG. 3, “24” is an “automatic origin search” start button for executing injection, mold opening / closing, and origin search of each axis of the ejector, and 25 is an automatic movement of the mold thickness performed before the mold is attached. An “automatic thickness transfer” start button 26 for executing, and an “automatic purge” start button for continuously executing the purge operation.

  FIG. 4 is a flowchart showing the transition of the setting state of the permission / prohibition button 21. First, it is determined whether or not automatic tightening is being performed (step S1). If automatic tightening is being performed (if YES is determined), the process proceeds to step S2 and automatic tightening is completed. When the automatic tightening is completed (when YES is determined), the prohibit / inhibit button 21 is disabled (step S3). On the other hand, when the automatic tightening is not executed in step S1 (when NO is determined), the process proceeds to step S4, where it is determined whether or not the permit / prohibit button 21 is touched and the touch operation is performed. If it is determined that the touch operation has not been performed (if NO is determined), the process returns to step S1. In step S5, it is determined whether or not the setting state of the permission / prohibition button 21 is in the permission state. If the permission / prohibition button 21 is set to the permission state (YES determination), the permission / prohibition button 21 in step S6 is determined. If the permission state is set and the prohibition state is set (if NO is determined), the permission / prohibition button 21 in step S7 is disabled.

  FIG. 5 is a flowchart showing the flow of control when the setting state of the permission / prohibition button 21 is in the prohibition state. When the permission / prohibition button 21 is in the prohibited state (step S11), it is determined in step S12 whether or not the mold thickness adjustment operation has been performed. If the mold thickness adjustment operation has been performed (YES determination is made). In the case), the process proceeds to step S13. If the mold thickness adjustment operation has not been performed (NO determination is made), the process proceeds to step S14. In step S13, the mold thickness adjustment operation is prohibited, and an alarm message such as “Die thickness operation prohibited” is displayed on the display unit 3. In step S14, it is determined whether or not an instruction to start a fully automatic molding operation has been issued. If an instruction to start a fully automatic operation has been issued (if YES), the process proceeds to step S15, and the operation is fully automatic. If no instruction to start operation is given (NO determination), the process returns to step S12. In step S15, it is determined whether or not automatic tightening has been completed. If automatic tightening has been completed (if YES is determined), the process proceeds to step S16, and automatic tightening has not been completed. If NO is determined, the process proceeds to step S17. In step S16, a fully automatic molding operation is started. In step S17, the fully automatic molding operation is prohibited, and an alarm message such as “Full automatic operation is prohibited because tightening is not completed” is displayed on the display unit 3.

  As described above, in this embodiment, the permission / prohibition button 21 for permitting / prohibiting execution of the mold thickness adjustment is provided in the mold thickness mode image (mold thickness screen), and the permit / prohibit button 21 is prohibited. When in the state, the main control means 1 is configured not to accept the mold thickness adjustment operation. Therefore, as long as the permission / prohibition button 21 is in the prohibited state, the exchange mode is selected and the “mold” is selected. Even if the manual operation key 15 for “thickness retreat” or the manual operation key 15 for “mould thickness advance” is inadvertently operated, the mold thickness adjustment is not performed, so that there is no possibility that the set mold clamping force will be distorted. In addition, even before or during the mold thickness adjustment, or even if the mold thickness adjustment has been completed but the automatic tightening has not been completed, before the operator leaves the injection molding machine, When the operator operates the permission / prohibition button 21 to place it in the prohibited state, even if another unfamiliar operator or the like performs the mold thickness adjustment operation, the mold thickness adjustment operation can be prohibited. . In addition, by automatically disabling the permit / prohibit button 21 after completion of automatic tightening, the mold thickness adjustment after completion of automatic tightening is prohibited without making the operator aware of the operation of the permit / prohibit button 21. Can be made. Further, when the operator leaves the injection molding machine in a state where the automatic tightening has not been completed, the operator operates the permission / prohibition button 21 to place it in a prohibited state, so that other operators, etc. Even if it is inadvertently instructed to start a fully automatic molding operation, the fully automatic molding operation can be prohibited.

It is a block diagram which shows the principal part structure of a control system in the injection molding machine which concerns on one Embodiment of this invention. It is explanatory drawing which shows the structure of the input operation part and the display part in the injection molding machine which concerns on one Embodiment of this invention. In the injection molding machine which concerns on one Embodiment of this invention, it is explanatory drawing which shows the mold thickness mode image (mold thickness screen) displayed on the display part. It is a flowchart which shows the flow of the transition of the setting state of the permission / inhibition button in the injection molding machine which concerns on one Embodiment of this invention. It is a flowchart which shows the flow of control in the injection molding machine which concerns on one Embodiment of this invention when the setting state of a permission / inhibition button is a prohibition state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main control part 2 Input operation part 2a Key operation part 2b Touch panel input part 3 Display part 4 Mold thickness adjustment control part 5 Automatic tightening control part 6 Fully automatic operation control part 8 Permit / prohibition setting part 21 Permit / prohibit button

Claims (1)

The mold thickness can be adjusted by the mold thickness movement command, and the mold clamping force can be set by the automatic tightening command after entering the numerical value of the mold clamping force .
A permission / prohibition button for permitting / prohibiting execution of the mold thickness adjustment is provided in the predetermined display mode image. When the permission / prohibition button is in a prohibited state, the control unit of the molding machine controls the mold thickness. In a molding machine that controls not to accept adjustment operations ,
Regardless of the setting state of the permission / inhibition button before the end of automatic tightening, the control means automatically sets the setting state of the permission / inhibition button to the prohibited state after the end of automatic tightening;
If the setting state of the allow / prohibit button is prohibited before the end of automatic tightening, the fully automatic operation is prohibited even if an execution command for fully automatic operation is received before the end of automatic tightening. And molding machine.

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