JP-7855819-B2 - Display device for injection molding machine, control device for injection molding machine, and injection molding machine

Inventors

• 堀田 大吾
• 山口 毅秀
• 水梨 琢也

Assignees

• 住友重機械工業株式会社

Dates

Publication Date

20260511

Application Date

20221219

Claims (8)

1. A display device for an injection molding machine comprising: an injection member provided inside a cylinder for heating a molding material; and an injection drive source that advances the injection member to fill the molding material into the inside of a mold device, In an injection process that controls the speed of the injection member or the pressure applied by the injection member to the molding material, a screen is displayed that accepts a selection of whether to perform retraction speed control, which controls the actual speed of the injection member to a first set value, or retraction speed limiting, which limits the actual speed of the injection member to a second set value or less, while the injection member is retracting. Display device for injection molding machines.
2. The display device for an injection molding machine according to claim 1, wherein the screen has a combined input field that serves as both a first input field for inputting the first setting value and a second input field for inputting the second setting value.
3. The display device for an injection molding machine according to claim 2, wherein the selection unit and the combined input field are arranged side by side.
4. The display device for an injection molding machine according to any one of claims 1 to 3, wherein the screen has a retraction amount input field for inputting a set value for the retraction amount of the injection member as a condition for releasing the retraction speed control.
5. The injection process includes a holding pressure step that controls the pressure acting on the molding material from the injection member, The display device for an injection molding machine according to any one of claims 1 to 3, wherein the screen has a first input field for inputting the first setting value and an input field for inputting the setting value for the holding pressure process arranged side by side.
6. The injection process comprises, in this order, a filling process for controlling the speed of the injection member and a holding pressure process. If the holding pressure process is divided into n steps (where n is an integer of 2 or more), and the k-th step (where k is an integer of 1 or more and n or less) from the step closest to the filling process is designated as the k-th step, The display device for an injection molding machine according to claim 5, wherein the screen has an input field that serves as both an input field for inputting a set value for the time to perform the first stage of the holding pressure process and an input field for inputting a set value for the time to perform the retraction speed control.
7. A control device for an injection molding machine that controls the injection process according to settings using a display device described in any one of claims 1 to 3.
8. An injection molding machine comprising the display device according to any one of claims 1 to 3, the injection member, and the injection drive source.

Description

This invention relates to a display device for an injection molding machine, a control device for an injection molding machine, and an injection molding machine. An injection molding machine comprises an injection member installed inside a cylinder that heats the molding material, an injection drive source that advances the injection member to fill the mold device with the molding material, and a control device that controls the injection drive source (see, for example, Patent Document 1). The injection member is, for example, a screw. The screw is rotatably and reciprocally installed inside the cylinder. The control device performs the filling process and the holding pressure process in this order. The filling process involves controlling the injection drive source so that the actual movement speed of the injection member reaches a set value, thereby filling the mold material into the mold device. The holding pressure process involves controlling the injection drive source so that the actual pressure acting on the mold material from the injection member reaches a set pressure value, thereby replenishing the molding material lost due to cooling shrinkage within the mold device. The switch from the filling process to the holding pressure process is also called V/P switching. Immediately after V/P switching, if the actual pressure value is greater than the pressure set value, the injection member is retracted to reduce the actual pressure value. Patent Document 1 describes that by setting a limit on the retraction speed of the injection member during the holding pressure process, the adverse effects on the quality of the molded product caused by the high-speed retraction of the injection member immediately after V/P switching can be eliminated. Patent No. 3917459 Figure 1 shows the state of an injection molding machine upon completion of mold opening according to one embodiment.Figure 2 shows the state of an injection molding machine during mold clamping according to one embodiment.Figure 3 is a diagram showing an example of the components of a control device in terms of functional blocks.Figure 4 shows an example of the molding cycle process.Figure 5 shows an example of an injection control unit.Figure 6 shows an example of a speed command correction unit.Figure 7(A) shows an example of the screen when reverse speed control is selected, and Figure 7(B) shows an example of the screen when reverse speed limit is selected.Figure 8 shows an example of the time variation of screw speed, pressure, and screw position when retraction speed control is selected. The embodiments of the present invention will be described below with reference to the drawings. Note that identical or corresponding components in each drawing are denoted by the same reference numerals, and their descriptions may be omitted. (injection molding machine) Figure 1 shows the state of an injection molding machine when the mold opening is complete according to one embodiment. Figure 2 shows the state of the injection molding machine when the mold is clamped according to one embodiment. In this specification, the X-axis direction, Y-axis direction, and Z-axis direction are perpendicular to each other. The X-axis direction and Y-axis direction represent the horizontal direction, and the Z-axis direction represents the vertical direction. When the mold clamping device 100 is horizontal, the X-axis direction is the mold opening and closing direction, and the Y-axis direction is the width direction of the injection molding machine 10. The negative side in the Y-axis direction is called the operating side, and the positive side in the Y-axis direction is called the non-operating side. As shown in Figures 1 and 2, the injection molding machine 10 includes a clamping device 100 for opening and closing the mold device 800, an ejector device 200 for ejecting the molded product formed in the mold device 800, an injection device 300 for injecting molding material into the mold device 800, a moving device 400 for moving the injection device 300 forward and backward relative to the mold device 800, a control device 700 for controlling each component of the injection molding machine 10, and a frame 900 for supporting each component of the injection molding machine 10. The frame 900 includes a clamping device frame 910 for supporting the clamping device 100 and an injection device frame 920 for supporting the injection device 300. The clamping device frame 910 and the injection device frame 920 are each installed on the floor 2 via leveling adjusters 930. The control device 700 is located in the internal space of the injection device frame 920. The components of the injection molding machine 10 will be described below. (mold clamping device) In describing the mold clamping device 100, the direction of movement of the movable platen 120 when the mold is closed (for example, the positive X-axis direction) is described as forward, and the direction of movement of th