JPH04249125A - Mold replacing method for injection molding machine - Google Patents

Abstract

PURPOSE:To perform the automatic replacement of a mold for respective one injection molding machine in which an installation space is not required and the replacement can be carried out compactly. CONSTITUTION:In the mold replacement method, a mold 10 to be fed in or fed out is placed on a transfer travelling bed 11 moving on a track 7 installed on the upper section of a mold clamping device 4 in the mold closing and opening direction, and moved, and the feeding in and out of the mold 10 is carried out by a mold fee-in and feed-out device 14 mounted on the upper section of a mold mounting section 12 of an injection molding machine 1. An installation space, therefore, is not required, and the replacement can be carried out compactly.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for exchanging molds in an injection molding machine, and particularly to a method for exchanging molds that is space-saving and does not require installation space.

0002

[Prior Art] There are many conventional mold changing devices and methods, but the mold is loaded and unloaded from a cart installed on the floor in parallel with the molding machine, and the mold is loaded and unloaded from the side of the molding machine using an unloading device. Two types of chucking are already known: one is chucking with a chucking device, and the other is chucking from above. A few of these techniques will be briefly explained below.

[0003] The mold changing device described in Japanese Utility Model Publication No. 2-2576 is provided with a movable trolley on the opposite side of the molding machine, and the mold is transferred from the lateral direction of the molding machine onto the upper surface of this trolley. A mold exchange stand with a transfer means is provided to transport molds in and out from the side.

Next, the method disclosed in Japanese Patent Publication No. 59-48737 is performed from above, and as shown in the embodiment, a mold stock stand with a conveyor roll is installed on the floor on the opposite side of the injection molding machine. A support is erected between the mold stock stand and the injection molding machine, a T-shaped rotating arm is installed on the top of the support, and chuck devices for chucking the mold are installed at both ends of this arm. This is a method in which the mold is loaded and unloaded from above by raising and lowering the mounting and chuck device using a lifting cylinder. In this case, the mold is carried in and out by rotating the arm 180 degrees. In another embodiment, a fixed arm rather than a rotating arm is protruded from above the mold stock table to above the injection molding machine, and a transfer table having a chuck device is moved on this arm. It is.

[0005] Furthermore, there is a method disclosed in Japanese Patent Publication No. 18899/1983 that similarly performs the process from above. In this system, a running rail is installed above the injection molding machine and a mold stocker installed on the side of the injection molding machine in a perpendicular direction, and a mold transport robot that moves on this running rail is installed. The molds are brought in and taken out.

[0006]

[Problems to be Solved by the Invention] In the conventional injection molding machine mold changing method, as described above, the injection molding machine is replaced from a trolley or mold stocker installed on the opposite operation side or the operation side of the injection molding machine. The mold is loaded and unloaded into and out of the mold mounting area from the side using a transfer means, or from above using a chuck device or a transfer robot. In addition, the number of molding machines installed per the same factory area may be reduced because supports on the sides and running rails and robots installed above in a direction perpendicular to the molding machine are required. In addition, the method using a transport robot that transports on running rails is effective when the scale of the equipment is large, but it lacks practicality when the scale is small.

The present invention does not require installation space on the floor, is compact, can increase the number of molding machines installed per the same factory area, and aims to automatically replace molds.

[0008]

[Means for Solving the Problems] In order to achieve the above object, the mold changing method for an injection molding machine of the present invention includes a mold clamping device on the upper part of the mold clamping device of the injection molding machine, and a track laid in the mold opening direction. After the mold to be carried in and/or taken out is placed on the transfer carriage that moves and moved on the orbit to the upper part of the mold mounting part of the injection molding machine, , a mold loading and unloading device that carries in and out the mold in the vertical direction, chucks the mold to be loaded from the transfer platform and carries it into the mold mounting section, or a mold loading and unloading device The mold taken out from the mold mounting section is placed on a transfer carriage and taken out.

[0009] Depending on the mold replacement frequency and factory layout, etc., the mold replacement can be performed more efficiently by selecting and using one or two of the above-mentioned transfer tables, or one having a turntable structure.

0010

[Operation] The mold to be loaded and unloaded is placed on the transfer platform that moves on a track provided in the mold clamping and mold opening direction on the upper part of the mold clamping device of the injection molding machine. After moving to the upper part of the mold mounting part, the mold to be carried in or taken out is grabbed by the mold loading/unloading device installed at the upper part of the mold mounting part, and the mold is carried from the transfer platform to the mold mounting part or the mold is installed. from the department to the transfer platform.

[0011] Depending on the mold replacement frequency and factory layout, etc., mold replacement can be performed more efficiently by selecting and using one or two transfer tables, or one with a turntable structure. .

0012

[Example] An example will be described with reference to the drawings. FIG. 1 shows an embodiment of the present invention, in which an injection molding machine 1 has an injection device 3 and a mold clamping device 4 installed on the upper surface of a frame 2. As shown in FIG. In the upper part of the mold clamping device 4, that is, in the upper part between the mold clamping cylinder 5 and the fixed die plate 6, two tracks 7 are laid in parallel in the mold clamping and mold opening directions. Stoppers 8 are attached to both end faces of these tracks, respectively.

[0013] On the upper surface of the track 7, a transfer carriage 11 having four wheels 9 on one side and on which a mold 10 to be carried in and carried out is placed and moved is mounted so as to be movable in the direction of the track. . This transfer platform 11 is moved along the track 7 by a drive device (not shown).
It can be moved freely on the top and can be stopped at a desired position. This drive device is composed of an electric motor with a brake that can rotate in forward and reverse directions, a speed reducer, and the like.

[0014] Further, a gate-shaped frame 13 is erected above the mold mounting portion 12 of the injection molding machine 1 and straddles the track 7.
A mold loading and unloading device 14 is located approximately in the center of this frame 13.
is installed. This mold loading/unloading device 14 is composed of a hydraulic cylinder 15 and a mold chucking device 17 vertically installed at the tip of a cylinder rod 16 of the hydraulic cylinder 15. The mold chucking device 17 is an air cylinder. 18, the rod 21 of the mold chucking device 17 is inserted into the hanging hole 20 provided in the mold mounting plate 19 of the mold 10 to chuck the mold.

Further, a guide member (not shown) for guiding the mold 10 when carrying the mold 10 in and out, a landing stopper, a mold automatic clamping device, etc. are attached to the fixed die plate 6 and the movable die plate 22. It is being

Next, the operation will be explained. When transporting the mold 10, the mold 10 to be used from now on (hereinafter referred to as the next mold) is placed on the transfer platform 11 at the position (A), and the mold is placed under the mold transport/unloading device 14 (B). ) position, lower the mold chucking device 17, chuck the next mold 10 and lift it slightly, return the transfer platform 11 to its original position, and then use the mold chucking device 17 to lower the mold chucking device 17. 10 is suspended and then lowered until the mold 10 contacts the landing stopper. Then, it is fixed to the stationary die plate 6 and the movable plate 22 using a mold automatic clamping device. Now the next mold 10
The loading operation is completed. When unloading, perform the operation in the opposite direction to the loading operation.

In this embodiment, the mold loading and unloading device 1
Although the hydraulic cylinder 15 is used as the drive source of 4, it may also be a lifting device that combines a servo motor and a ball screw, or a lifting device that combines an electric motor, a worm gear, a lifting screw, etc.

FIGS. 3 and 4 show another embodiment, and the same members as those in FIG. 1 are designated by the same reference numerals, and the explanation thereof will be omitted. Only the different members will be explained below.

The upper part of the mold clamping device 4, that is, the mold clamping cylinder 5
A track 37 is laid in the upper part between the die plate 6 and the fixed die plate 6 in parallel to the mold clamping and mold opening direction. Orbit 37 is shown in Figure 1.
It is provided in an overhanging form on the injection device 3 side, which is longer than that of the embodiment shown in FIG. 1
1a and 11b are arranged.

Next, the operation will be explained. In carrying in the next mold 10 and carrying out the previously used mold (hereinafter referred to as a cash mold) 10b, the next mold 10 is first placed on the transfer platform 11a at the (A) position. Next, the mold chucking device 17 of the mold loading and unloading device 14 descends to hold the cash mold 10b between the fixed die plate 6 and the movable die plate 2.
2 and chucking it to the mold chucking device 17.
to the upper limit, and then move the transfer platform 11b (C
) to the position (B), the mold chucking device 17 is lowered, and the cash mold 10b is placed on the transfer table 11b. Then, the transfer platform 11b is returned to the original position (C), and the unloading operation is completed. Next, the transfer platform 11a on which the next mold 10 is placed is moved from the (A) position to the (B) position,
The mold chucking device 17 is lowered, the mold 10 is then chucked, and the mold 10 is lifted up slightly, and then the transfer table 1 is moved.
Return 1a to position (A). Next, mold chucking device 1
7 is lowered to the mold mounting portion 12 until it stops at the landing stopper, and the operation of carrying in the next mold 10 is completed.

FIGS. 5 and 6 show still another embodiment of the present invention. Similar to the embodiment shown in FIGS. has been installed. Unlike the previous embodiment, trajectory 3
8 is divided into two parts in the longitudinal direction, and one side thereof is provided on the upper surface of a turntable 39 which can be rotated 180 degrees, and transfer/transfer tables 11a and 11b are placed on this turntable 39. The frame 40 supporting the mold chucking device 17 has a box shape. A mold chucking device 1 is provided on the upper surface of the mold mounting portion 12 of the injection molding machine 1.
7 is provided.

The rotation of the turntable 39 is driven by a mechanism in which a brake motor with a reducer (not shown) is used, a pinion is attached to the motor shaft, and this pinion meshes with a large gear provided on the outer periphery of the turntable 39. It has become. Of course, other methods, such as a worm and worm-hole method, are also possible.

Next, the operation will be explained. In carrying in the next mold 10 and carrying out the cash mold 10b, the next mold 10 is first placed on the transfer table 11a on the (A) side of the turntable 39. Next, the mold chucking device 17 is attached to the injection molding machine 1.
The cash mold 10b is lowered to the mold attachment part 12 of the machine, and the cash mold 10b is chucked and raised to the upper limit. In this state, move the transfer table 11b on the (B) side of the turntable 39 to the cash type 1.
0b and place the cash mold 10 on top of the transfer platform 11b.
b is placed and returned to the (B) side on the turntable 39, and the unloading operation is completed.

Next, the turntable 39 is rotated 180 degrees to move the transfer table 11a on which the next mold 10 is placed to the upper part of the mold mounting part 12, and the next mold 10 is moved by the mold chucking device 17. After chucking and raising to the upper limit and returning the transfer platform 11a to its original position, the mold chucking device 1
7 is lowered and the next mold 10 is carried into the mold mounting section 12. This completes the operation of carrying in the next mold 10.

[0025]

[Effects of the Invention] Since the present invention is a mold changing method as explained above, the mold changing device for an injection molding machine using this method does not require installation space, is compact, and can easily be used in an injection molding machine. Automatic mold replacement can be easily performed for each machine.

[0026] Also, when carrying in and out of the mold, it is possible to select and use either one or two transport tables on which the mold is placed and moved, depending on the frequency of mold replacement and the factory layout. Mold exchange can be performed more efficiently.

[0027] Furthermore, by selectively using a method in which two transfer tables are provided on the track above the turntable, the process can be carried out efficiently.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of a method for replacing a mold of an injection molding machine according to the present invention.

FIG. 2 is a plan view of FIG. 1;

FIG. 3 is a front view showing another embodiment of the method for changing molds of an injection molding machine according to the present invention.

FIG. 4 is a partial plan view of FIG. 3;

FIG. 5 is a front view showing still another embodiment of the method for replacing molds of an injection molding machine according to the present invention.

FIG. 6 is a partial plan view of FIG. 5;

[Explanation of symbols]

1 Injection molding machine 2 Frame 3 Injection device 4 Mold clamping device 7 Orbit 10 Mold 11 Transfer platform 12 Mold mounting part 14　Mold loading and unloading device 17 Mold chucking device 37 Orbit 38 Orbit

Claims (5)

[Claims] Claim 1: A mold to be carried in and/or taken out is placed on a transfer carriage that moves on a track laid in the mold clamping and mold opening direction on the upper part of the mold clamping device of an injection molding machine, and After moving the upper part to the upper part of the mold attachment part of the injection molding machine, a part is installed at the upper part of the mold attachment part to carry the mold in the vertical direction,
The mold to be carried in and out is chucked from the transfer platform and carried into the mold mounting section by the mold loading and unloading device, or the mold is transported from the mold mounting section by the mold loading and unloading device. A mold exchanging method for an injection molding machine, characterized in that the carried out mold is placed on the transfer table and carried out. 2. The method for replacing molds in an injection molding machine according to claim 1, wherein the transfer table is composed of one unit and is used for carrying in and taking out the molds. 3. The method for replacing molds in an injection molding machine according to claim 1, wherein the transfer table is composed of two units and is used for carrying in and taking out the molds. 4. The mold changing method for an injection molding machine according to claim 1, wherein the track is a fixed type that is not divided in the longitudinal direction. 5. The mold changing method for an injection molding machine according to claim 1, wherein the track is divided into two in the longitudinal direction, one of which is on the top surface of a turntable.