JPH0243600Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a mold changing device in a processing machine that uses molds, such as a vertical press machine, a horizontal injection molding machine, or a die-casting machine, and the required number of mold changing drive devices. The objective is to reduce the manufacturing cost by reducing the size and weight of the mold receiving frame by half.

The basic structure of the above-mentioned mold changing device is that two mold receiving frames are provided on the front side of the processing machine so as to be movable in the left and right direction, and the molds removed from the processing machine are transferred onto one of the mold receiving frames using a transfer drive device. After the transfer, the mold receiving frame is shifted and the mold on the other mold receiving frame is sent to the processing machine by a transfer drive device, thereby performing mold exchange.

As a typical example of a conventional device, a ``press die conveying device'' (Japanese Patent Publication No. 55-48535) is disclosed.

In this device, each of the two mold receiving frames is provided with a transfer drive device, and after the mold on the processing machine side is transferred onto one of the mold receiving frames by the transfer drive device, the mold receiving frame is shifted to the other. The mold on the mold receiving frame is carried into the processing machine using the transfer drive device.

Therefore, there is a drawback that only one of the two replacement drive devices is always in operation, and the other one is in a dormant state.

In addition, all the transfer drive devices that push and pull the mold are incorporated into the mold receiving frame, which complicates the structure of the mold receiving frame, increases its own weight, increases the size of the traveling drive device, and also changes the external shape of the mold receiving frame. It also has the disadvantage of being larger.

In order to eliminate the above-mentioned drawbacks, the present invention is such that the changing drive device of the mold changing device is separated from the mold receiving frame and disposed below the mold mounting space of the processing machine.

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows an overall perspective view of a horizontal injection molding machine M and its mold changing device T, in which a pair of left and right molds D are placed in a mold mounting space 3 between a fixed platen 1 and a movable platen 2 of the molding machine M. can be attached to and detached from the fixed platen 1 and the movable platen 2 by a clamp device 4.

Normally, in an injection molding machine M, the mold D must be replaced every time a lot is changed, and a mold changing device T for this mold changing is arranged as follows.

On the front side of the molding machine M, two mold receiving frames 5 arranged side by side on the left and right on one trolley S run in the left and right direction on a traveling rail 6 via a traveling drive device 7, and each mold receiving frame 5 can be alternatively moved to a mold exchange position X on the front side of the mold mounting space 3.

A pair of conveyance roller devices 8 are fixedly installed on the fixed platen 1 and the movable platen 2 below the mold mounting space 3 of the molding machine M, and the center alignment of the mold D is performed using the positioning pins 9a of the center positioning device 9. It is becoming possible to do this.

In addition, one set of two conveyor rollers 8A is attached to the upper surface of each mold receiving frame 5, and this conveyor roller 8A
A pair of molds D can be placed on top.

A transfer drive device P for transferring the mold D between the molding machine M and the mold receiving frame 5 is disposed below the mold installation space 3, and is used to transfer the mold D at the mold exchange position X. A pair of molds D can be moved back and forth between the receiving frame 5 and the mold mounting space 3 to be replaced.

The above-mentioned replacement drive device P is constructed as shown in FIG. 3. A part of the endless drive belt 11 wrapped around the chain rings 10 at both front and rear ends is run back and forth along the guide frame 12 directly under the mold mounting space 3,
By driving the drive band 11 in the forward or reverse direction via the drive wheel 12 with a drive electric motor 13, the push/pull tool 14 connected to the drive band 11 is moved back and forth along the guide frame 12. There is.

When carrying the mold D into the mold mounting space 3, the push/pull tool 14 is positioned at the frontmost end as shown in the figure, and the hook portion of the push/pull arm 14a is engaged with the connector 15 of the mold D. , drives the electric motor 13 to move the push/pull tool 14
is moved backward and the mold D is carried into the mold mounting space 3. After loading, align the center of mold D,
A pair of molds D are fixed to a fixed platen 1 and a movable platen 2 by a clamp device 4.

Moreover, when carrying out the mold D, the die D is pushed and driven by the push-pull arm 14a of the push-pull tool 14, contrary to the above, and the die D is carried out.

The drive band 11 of the above-mentioned exchange drive device P is made of a steel chain, and the chain ring 10A can be adjusted in position in the front and rear direction with a screw 23 of a tension adjustment mechanism 22 in order to adjust the tension of the drive band 11. The drive wheel 10B interlocked with the electric motor 13 by a chain or the like is a chain wheel with a torque limiter. Electric motor 12 and tension adjustment mechanism 22
are arranged in parallel in the front and rear of the processing machine M on the lower side of the guide frame 12 within the front and rear width of the processing machine M. Further, reference numerals 16 and 17 are stoppers for regulating the front end position and rear end position of the push/pull tool 14, respectively.

The guide frame 12 is used to guide and support the push/pull tool 14 and to prevent the drive band 11 from sagging.

That is, as shown in FIG.
is guided by the guide opening 12b on the top surface of the guide frame 12, and is guided by the support surface 12c on the top surface of the guide frame 12.
Sliding support is provided.

This guide frame 12 is fixedly installed on the fixed platen 1 of the molding machine M, but it may also be attached to the floor side.

The traveling drive device 7 for the truck S is constructed as shown in FIGS. 2 and 4. That is, an electric motor 7a with a reduction gear and a pinion gear 7b interlocked with the electric motor 7a are attached to the left side of the truck S, and the pinion gear 7b meshes with a rack 7c on the floor so that the truck S runs left and right. It's summery.

However, instead of the above rack and pinion mechanism, a trolley S
Torque may be transmitted to the running wheels 18 of the vehicle to cause the vehicle to travel.

Reference numerals 19, 20, and 21 in the figure are limit switches for detecting the position of the cart S, the position of the mold D, the position of the push/pull tool 14, and the like.

Since the present invention is configured as described above, it has the following effects.

(b) With only one transfer drive device installed below the mold mounting space of the processing machine, molds can be transferred from the processing machine to one mold receiving frame, and molds can be transferred from the other mold receiving frame to the processing machine. We can also carry it in.

In other words, in the conventional product mentioned above, two replacement drive devices were required, one for one mold holder and one for the other mold holder, but in the present invention, this is halved to one as described above. It can be done.

(b) The mold receiving frame has a smaller external size due to the separation of the transfer drive device, and its own weight can be reduced as the strength to support the transfer drive device is no longer required, so the mold support frame as a whole can be reduced in size. By making it smaller and lighter, it is possible to lower production costs and reduce the space it occupies.

C. Since the entire mold receiving frame is smaller and lighter, the traveling drive device that moves it from side to side can also be smaller, and its manufacturing and operating costs can be reduced.

D. Since the reloading drive device is attached to the fixed platen and the movable platen, it is possible to flexibly accommodate changes in the horizontal width of the mold used.

E. In the reloading drive device, a push/pull tool is connected to a drive band wrapped around chain rings at both front and rear ends of the guide frame, and this drive band is driven in forward and reverse directions by a drive electric motor. , since the driving electric motor and the tension adjustment mechanism of the driving band are located within the front and rear width of the processing machine,
The planar space occupied by the entire mold changing device can be reduced, and the electric motor and tension adjustment mechanism do not interfere with the installation of other accessory devices attached to the processing machine.

F. The drive electric motor and tension adjustment mechanism are arranged side by side in the front-back direction below the guide frame so that they fit within the front-to-back width of the processing machine, so even though they are below the guide frame, The height of the guide frame can be lowered,
The entire device can be made compact.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is an overall perspective view of an injection molding machine and a mold changing device, Fig. 2 is a plan view thereof, Fig. 3 is a sectional view taken along the - line of Fig.
The figure is a sectional view taken along the line -- in FIG. 2, and FIG. 5 is a vertical sectional front view of the guide frame. M...Processing machine, D...Mold, 1...Fixed plate,
2... Movable platen, 3... Mold mounting space, 5... Mold receiving frame, X... Mold exchange position, P... Replacement drive device, 10, 10A... Chain ring, 11... Drive band ,1
2... Guide frame, 13... Drive motor, 14...
Push/pull tool.

Claims (1)

[Scope of utility model registration request] A mold mounting space 3 is defined between the fixed platen 1 and the movable platen 2 arranged on the left and right sides, and a pair of left and right molds D positioned in this mold mounting space 3 are attached to and removed from the fixed platen 1 and the movable platen 2. In the horizontal injection molding machine M that can be freely installed to perform injection molding, the horizontal injection molding machine M
At least two mold receiving frames 5 are provided movably from side to side on the front side of the mold receiving frame 5, and each mold receiving frame 5 is selectively movable to a mold exchange position X on the front side of the mold mounting space 3,
The mold D is moved back and forth between the mold receiving frame 5 located at the mold exchange position X and the mold mounting space 3 so that it can be replaced, and this mold D is moved back and forth to be replaced. The drive device P is separated from the mold receiving frame 5 and placed below the mold mounting space 3 and mounted on the fixed platen 1 and the movable platen 2. A push/pull tool 14 is provided so as to be movable forward and backward along a guide frame 12 installed in the front and back of the guide frame 12, and this push/pull tool 14 is connected to a drive band 11 that is wrapped around chain rings 10 at both front and rear ends of the guide frame 12. A drive electric motor 13 that drives the drive band 11 in the forward and reverse directions and a tension adjustment mechanism 22 that adjusts the tension of the drive band 11 are arranged so that they fit within the front and back width of the processing machine M below the guide frame 12. A mold changing device for a horizontal injection molding machine, which is characterized by being installed side by side in the front and back direction.