JPS61149333A - Mold automatic replacing apparatus for injection molding machine - Google Patents

Abstract

PURPOSE:To make it possible to replace a mold easily without requiring an apparatus and an automatic joint on a large scale, by arranging a mold automatic replacing apparatus at a clamping section of an injection molding machine, rotating a rotating table to allow the placing section of a selected mold to face the clamping section, introducing a mold, replacing the selected mold with the introduced mold, securing a supply/discharge hose to each mold via a change-over valve apparatus, and connecting each mold to a controlling apparatus via a cable. CONSTITUTION:A rotating table 1 is rotated so that molds 5a-5d are caused to face a clamping section of an injection molding machine. If the mold 5a is selected, a conveying means 14 is rotated to the position indicated by solid line by a hydraulic cylinder 12. Then a mold catching means 15 is rotated by a hydraulic means 16 to allow the mold 5a to engage with an engaging section 19a. Then when a chain 17 is driven by a servomotor M so that a traveling body 11 is moved along guide rods 10a, 10b, the mold 5a is moved on rollers Ra..., and a cable 21a and a supply/discharge hose 22a secured to the mold 5a are also moved and are allowed to ride on rollers 8a, 9 to be conveyed to the position indicated by 5a', that is, a clamping section.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention is directed to an automatic mold changer for an injection molding machine that can automatically change the mold of an injection molding machine. I am Zururano.

Conventional technology In order to streamline, automate, and save labor in injection molding systems used in plastic molding, it is necessary to streamline the control of the molding machine itself and at the same time rationalize it as a total system including peripheral equipment. . One of these is to be able to automatically exchange molds, but conventional automatic mold exchange machines use a mold stocking section using an automated warehouse, etc., and automatic guided vehicles and overhead lanes. It consists of a transport device and a control section that controls them.
Remove the mold from the injection molding machine, transport the mold to the mold stock section using the transport device, store it in the mold stock section, then take out the new mold from the mold stock section, and use the transport device to perform injection molding. It was transported to the machine and installed. The supply/drainage hose for supplying water, oil, etc. to the mold to adjust the temperature of the mold, and the connection of each sensor to detect the temperature and pressure of the mold are connected by automatic joints, etc. I was connecting using.

Problems to be Solved by the Invention As mentioned above, in the conventional example, the mold and mold temperature adjustment monthly salary and
Since automatic joints are used to connect the drainage hose and various sensors, the configuration is complicated and there are problems with reliability. The purpose of this invention is to solve these problems.

Means for solving the problem: A mold mounting section is arranged on a rotating table at a fixed angle offset from the center of rotation, and the mold mounting section is moved from the mold mounting section to the mold mounting section of the injection molding machine. Providing a traveling body, engaging the mold with the traveling body and carrying the mold from the mold mounting part to the mold mounting part,
A mold that is provided with a transport means for transporting the mold from the mold mounting part to the mold mounting part, and supplies water or oil to adjust the temperature of the mold with supply/discharge hoses fixed to each mold. A switching valve device is provided to switch and connect the temperature controller, and a control device is also provided to switch and control the switching valve device and input signals from sensors attached to each mold via a cable. .

When replacing the working mold, place the empty mold mounting part facing the mold mounting part of the injection molding machine, automatically engage the mold and the conveying means, and move the traveling body. Then, the mold is taken out from the mold mounting part and carried into the mold mounting part, and then the rotary table is rotated so that the mold mounting part of the newly installed mold faces the mold mounting part, and the conveying means After engaging the mold with the mold, the traveling body is moved to carry the mold from the mold mounting section to the mold mounting section of the injection molding machine, and the control device switches the switching valve device and installs it on the injection molding machine. Water or oil for mold temperature adjustment is supplied from the mold temperature controller to the mold through the supply/discharge hose. Further, the control device is configured to input signals from sensors of the mold attached to the injection molding machine.

Embodiment ゛Figure 1 is a diagram showing one embodiment of the present invention, and Figure 2 is a diagram showing an embodiment of the present invention.
FIG. 3 is a plan view of the rotary table of the automatic mold changer according to the embodiment shown in the figure.

The automatic mold changer of this embodiment is arranged such that the outlet for taking out the mold from the automatic mold changer faces the index molding machine mold attachment part, that is, the mold clamping part, as will be described later. In Figures 1 and 2, reference numeral 1 denotes a rotating tape, which is fixed to a rotating shaft 2 rotatably provided on the machine frame 3, and the rotating shaft 2 is rotated by a motor (not shown) or the like. It is now possible to do so.

As shown in FIG. 2, the rotary table 1 is provided with mold placement parts A to D for placing four molds 5a to 5d. Each of the mold placement parts A to D has a plurality of rollers Ra.
..., Rb..., RC..., Rd... are provided, and the rollers Ra..., Rb..., Re... are provided.

Molds A-D are placed on Rd. In addition, molds 5a to 5d are placed at the tip of the rotary table 1 of each mold placement part A to D.
Stoppers 6a, 6b, 6c, 6 for preventing movement of
d, and actuators 7a to 7d (hydraulic cylinders in this embodiment) such as solenoids and hydraulic cylinders are provided so as to be able to move in and out of the conveyance paths of the molds 58 to 5d, respectively. Furthermore, rows 88 to 8d for guiding the molds A to D to the mold mounting part of the injection molding machine are provided at the leading end of each of the mold placement parts A to D, and the rollers 8a to 8d The roller 9 that cooperates with the mold mounting part of the injection molding machine,
That is, it is provided in the machine frame 3 at a portion that forms a conveyance path for introduction into the mold clamping section. That is, the roller 9 is provided on the machine frame surface facing the injection molding machine. In addition, behind each mold placement part A-D, there are cables 21a to 21d for sensors connected to each mold 5a to 5d, mold temperature adjustment monthly cables, etc.
Holes 208-20d through which drainage hoses 22a-22d pass
is provided. And the above-mentioned supply/drainage hose 22a
22d are connected to a switching valve device 23 attached to the machine frame 3, cables 21a to 21d for the sensors are connected to a control device 25, and the switching valve device 2
3 is connected to the mold temperature controller 24 via a hose 26 and also connected to a control device 25 by a cable 21+11, and the control device 25 switches the valves of the switching valve device to the selected molds 5a to 5d. You can choose between supply and drainage. As shown in FIG. 1, guide rods 10a and 10b are provided in the upper part of the machine frame 3, and a traveling body 11 that is guided by the guide rods 10a and 10b and moves from side to side in FIG. 1 is provided. A hydraulic cylinder 12 is fixed to the traveling body 11. Further, the traveling body 11 has a conveyance means 14 rotatably fixed to the bin P1, one end of the conveyance means 14 is fixed to the piston rod 13 of the hydraulic cylinder 12, and the conveyance means 14 is rotated about the bin P1. It can be rotated. The conveying means 14 has a mold catching means 15 at its tip, is rotatably pivoted by the bin P2, and is rotated about the bin P2 by a hydraulic cylinder 16 fixed on the conveying means 14. , mold 5
It is adapted to engage with engaging portions 19a to 19d provided at portions a to 5d, respectively. Servo motor M is installed in the machine frame 3 above.
A chain 17 is installed between the sprocket S fixed to the drive shaft of the servo motor M and the sprocket S rotatably fixed to the other machine frame 3. The traveling body 11 is fixed. The automatic mold changer is disposed at the rear of the injection molding machine so that the running direction of the traveling body 11 is directed toward the mold mounting section, that is, the mold clamping section of the injection molding machine.

Next, the operation of this embodiment will be described.

First, the rotary table 1 is rotated to a position where the molds 5a to 5d to be attached to the injection molding machine face the mold clamping section of the injection molding machine (a position where the rollers 9 are provided). The molds 5a to 5d are each mounted on the rotary table 1 at positions rotated 90 degrees around the rotation axis 2, so when the rotary table 1 is rotated to face the mold clamping part of the injection molding machine, each mold is Types 5a-5d
are located at almost the same position. Assume that the mold 5a is now selected. Next, when the first hydraulic cylinder 12 is actuated to extend the piston rod 13, the conveying means 14 is rotated counterclockwise around the bin P1 to the position shown by the solid line in FIG. Next, the piston rod of the second hydraulic cylinder 16 is extended to move the mold capturing means 15 to the bin P2.
1 in the counterclockwise direction in FIG. 1, and engages with the engaging portion 19a of the mold 5a, as shown by the solid line in FIG. 1, to capture the mold 5a. Next, the actuator 7a is operated to retract the stopper 6a from the conveyance path. Then, the servo motor M is activated to drive the chain 17, and the running body 11
is moved to the left in FIG. 1 along the guide rods 10a and 10b. As the traveling body 11 moves, the conveying means 1
4 also moves, the mold catching means 15 presses the mold 5a, the mold 5a moves on the roller Ra..., and the cable 21a fixed to the mold 5a and the supply/drainage hose 22a also move accordingly. The mold is moved and placed on the roller 8a and the roller 9 on the machine frame, and is conveyed to the position shown in FIG. 1 5a', that is, to the mold clamping part of the injection molding machine.

Next, the piston rod of the second hydraulic cylinder 16 is shortened, and the mold capturing means 15 is moved to the bin P2.

The center is rotated clockwise in FIG. 1 to disengage the mold 5a and the mold catching means 15, and the servo motor M is reversed to move the traveling body 11. Retract the conveyance means 14 (right side in Figure 1)
At the same time, the piston rod of the hydraulic cylinder 12 is shortened to rotate the conveyance means 14 clockwise around the bin P1, and the servo motor M is stopped to restore the initial state.

The mold 5a thus carried into the mold clamping section of the injection molding machine is attached to the fixed plate and the movable plate of the injection molding machine, and then the control device 25 operates the switching valve device to adjust the mold temperature to the selected mold 5a. The valves are switched so that water for adjustment is supplied and drained, and the control device 25 detects signals from each sensor attached to the mold 5a via the cable 21a. In this way, the attachment of the mold 5a to the injection molding machine is completed, and when it is detected from the signals from each sensor that the injection conditions are suitable, the injection molding machine is operated and injection molding is started.

Next, when taking out the mold from the injection molding machine, first switch the valve of the switching valve device 23 and select the mold that has been used so far and is attached to the injection molding machine, mold 5a in the above example.
The supply and drainage for controlling the mold temperature are stopped, and the empty mounting portions A to D of the rotary table 1 are made to face the injection molding machine. In the above example, the mounting portions A are faced to each other, the actuator 7a is operated, the stopper 6a is retracted, the servo motor M is driven, the traveling body 11 is moved forward (to the left in FIG. 1), and the first hydraulic cylinder 12 The piston rod 13 of the rear cylinder 2 is extended, and the piston rod of the hydraulic cylinder 16 of the rear cylinder 2 is extended, and the mold catching means 15 is moved to the engaging portion 19a of the mold 5a.
After engaging with the mold 5a, the servo motor M is reversed and the mold 5a
are pulled out from the injection molding machine, and the rollers 9.8a, 5a...
・When the mold 5a is placed on top and moved to the right in Figure 1, and the mold 5a is completely carried into the mold placement part A of the rotary table 1, the drive of the servo motor M is stopped and the stopper 6a is placed on the conveyance path. The projecting mold 5a is fixed, the piston rod of the second hydraulic cylinder 16 is shortened, the mold 5a and the mold capturing means 15 are disengaged, and the piston rod 13 of the first hydraulic cylinder 12 is Then, the conveying means 14 is rotated clockwise in FIG. 1 about the bin P1, and the mold removal operation is completed.

In the above embodiment, the rotary table 1 is provided with four mold placement parts A to D, but the rotary table 1 may be made larger and more mold placement parts may be provided. In this case as well, it is sufficient to form mold mounting portions having the same shape and being shifted by a certain angle.

In addition, as a driving means for the rotary table 1 and the traveling body 11,
Although the above embodiment uses a servo motor, it is also possible to use a normal motor, detect the positions of the rotary table 1 and the traveling body 11 using a remote switch, and control the drive of the motor. Further, the rotary table 1 may be driven manually instead of being driven by a motor. Further, the conveying means 14 is rotatably attached to the traveling body 11, and the conveying means is inserted between the molds to convey the molds. The piston rod is made to protrude vertically, and when the mold is taken out from the injection molding machine, a conveyance aid is manually fixed to the mold, and the plunger and piston rod are engaged with this conveyance aid. The mold may be brought in and taken out.

Effects of the Invention As described above, the automatic mold changer of the present invention is installed in the mold clamping section of an injection molding machine, and rotates the rotary table so that the selected mold mounting section faces the mold clamping section. In addition, each mold has a supply/drainage hose fixed to it via a switching valve device to adjust the temperature of the mold. Sensors for detecting pressure inside the mold and mold are also fixed and connected to the control device via cables, so each time the mold is replaced, automatic joints etc. are used to connect the mold to the mold temperature controller and control device. There is no need to connect the mold, just carry the mold into the mold clamping part of the injection molding machine, install it, and switch the valve of the switching valve device, and there is no need for large-scale equipment or automatic joints for mold exchange.
Moreover, mold replacement can be easily and automatically performed.

[Brief explanation of drawings]

FIG. 1 is a diagram showing one embodiment of the present invention, and FIG. 2 is a diagram showing an embodiment of the present invention.
It is a top view of the rotary table of the automatic mold changer of one Example in a figure. 1... Rotary table, A-D... Mold placement part, 5a
~5d... Mold, 11... Traveling body, 14... Conveyance means, 208-20d... Hole, 21 a - 21 e
-... Cable, 22a to 22d... Supply/drainage hose, 23... Valve switching device. At the time of indulgence

Claims (1)

[Claims] A rotary table that rotates and has a plurality of mold mounting parts provided at fixed angles offset from the center of rotation, a traveling body that can move toward the mold mounting part of an injection molding machine, and a rotating table that is arranged above the mold mounting part. engages with the mold and carries the mold into the mold mounting section of the injection molding machine.
Water or oil is supplied to each mold via the conveyance means installed on the traveling body to be carried out and the supply/discharge hose connected to each of the molds by switching water or oil from the mold temperature controller. and a control device that is connected to each sensor attached to each of the molds via a cable, inputs signals from each sensor, and controls the valve switching device. Automatic mold changer for injection molding machines.