JPH08278B2 - Mold changer for molding machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a mold exchanging device for a molding machine that molds cores and the like.

[Prior Art] A conventional mold changing device for a molding machine is, for example, Japanese Patent Publication Sho 58
There is a "die changing device in a mold making machine" disclosed in Japanese Patent Publication No. 37055. This device has a trolley that traverses below a vise device that holds a mold, and the dolly is conveyed to the position directly below the vice device by this trolley so that the mold can be replaced. .

[Problems to be solved by the invention]

However, in the above-mentioned conventional structure, when exchanging the mold,
First, remove the mold attached to the mold making machine, place it on the dolly and carry it out from immediately below the bias device, then remove the removed mold from the dolly, and then place a new mold on the dolly. Since the dies are mounted on the vice device after being placed on the vice device and conveyed to the position right below the vice device, the mold replacement work is troublesome and takes time.

[Means for solving problems]

In order to solve the above-mentioned problems, a mold exchanging device for a molding machine of the present invention is provided below a mold disposing part of a molding machine, and conveys a mold for molding to the mold disposing part. A mold exchanging device for a molding machine equipped with a die transfer bar device, wherein the die transfer bar device has at least two die mounting portions on the upper surface side, and each die mounting bar is placed. Has a gripping device for positioning and holding the placed mold and releasing it, and is movable up and down, and each mold placing part is arranged directly below the mold disposing part in the molding machine. It is configured to be able to move back and forth.

[Work]

With the above configuration, the mold placed on the mold placing section on the mold conveying bar device is accurately positioned and held by the gripping device, and the mold distribution of the molding machine is performed by the upward movement and the forward movement. It is transported to the installation section. On the other hand, when exchanging the mold, the previous mold is detached from the mold disposing portion of the molding machine, placed on the die mounting portion of the die transport bar device, and lowered. Then, a new die is placed on another die placement section, and the die transfer bar device is moved so that the new die is placed immediately below the die placement section. It is possible to carry in and out of the mold at the same time.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIGS. 1 and 2, the molding machine 1 includes a pedestal.
An air tank 2, an upper die raising device 3, a hopper 4 for supplying sand for sand, and the like are provided on the upper portion of 1a. An upper mold 5 is attached to the lower end of the upper mold lifting device 3. On the side of the frame 1a,
A core removal device 7 for removing the molded core 6 is provided. The core take-out device 7 includes a fork lifting device 9 for vertically moving a fork 8 for supporting the core 6 by a cylinder 9a, a fork rotating device 10 for horizontally rotating the fork 8 by a cylinder 10a, and a fork 8 as a cylinder. Fork advancing / retreating device 11 for moving forward / backward by 11a
Consists of

A fixed side vise 13 for holding the fixed side mold 12 and a movable side vise 15 for holding the movable side mold 14 are provided at substantially the center of the frame 1a.
Are provided. Between these both vices 13 and 15 is a die arrangement part. The fixed-side vise 13 has a holder 13a for holding the fixed-side mold 12 from the back side, and clamp claws 13b, 13b for holding the fixed-side mold 12 from the top and bottom. On the other hand, the movable side vise 15 has clamp claws 15a, 15a for holding the movable side mold 14 from above and below, and the movable side mold 14 is fixed to the fixed side mold 12 by the guide rods 15b, 15b. It can move back and forth in the opposite direction. On the fixed-side vice 13 side, a fixed-side mold reversing drive device for rotating the fixed-side mold 12 about the rotating shafts 18a, 18a in a horizontal state 90 ° upward from the vertical state shown in FIG. 18 are provided. As shown in FIG. 2, the holder 13a of the fixed side vise 13 is clamped from both sides above the fixed side vise 13 when the fixed side mold 12 is vertically installed to position the fixed side mold 12. Inversion positioning lock unit 16 ・ 16 for reliable operation
Is provided.

A casting sand supply device 17 is provided above the above two vices 13 and 15. This sand-sand supply device 17 has a blow tank 17a at the lower end portion for supplying the sand-sand between the fixed-side die 12 and the movable-side die 14 via the upper die 5, A dolly 19 provided in the pallet allows the dolly 19 to move in a direction at a right angle to a die transfer bar device 20 described later.

Below the above-mentioned both vices 13 and 15, the mold transfer bar device
20 are provided. This die transfer bar device 20 has a third
As shown in FIG. 4 and FIG. 4, an elevating / lowering frame 21 provided with an anterior / posterior moving frame 22 movably in the anterior / posterior direction on an inner upper portion,
Front-rear moving frame 22 that moves the mounted molds 12 and 14 back and forth
And an elevating device 25 for elevating and lowering the elevating and lowering humm 21, and a front and rear moving frame drive cylinder 29 which is a front and rear driving device for the front and rear moving frame 22.

The hoisting frame 21 is composed of two parallel slender hoisting plates.
We have 26, 26. A spindle is installed between these two lift plates 26, 26.
27a are installed, and front and rear movement frame receiving rollers 27, 27 that movably support the front and rear movement frame 22 are axially attached to both ends of each support shaft 27a. On the inner surface of the lifting plate 26, 26,
A plurality of guide rollers 28, which guide the guide rails 32, 32 on the front-rear moving plates 31, 31 of the front-rear moving frame 22 by sandwiching them from the up-down direction, are axially mounted. On the side surface of one of the lifting plates 26, the rear end portion is arranged substantially at the end of the lifting plate 26, and the front end is placed on the lifting plate 26.
The forward-backward movement frame drive cylinder 29 is fixedly provided toward the center of the frame 26. A limit switch 30 for determining the stop position of the forward / backward moving frame 22 is attached to an end portion of the elevating plate 26 opposite to the position where the forward / backward moving frame drive cylinder 29 is disposed. Further, at the lower end of the elevating plate 26, two projecting portions 22a, 22a are formed in the downward direction, and the elevating device 25 is connected to these projecting portions 22a, 22a. This elevating device 25 is composed of a cylinder 23 and a rotation supporting part 24, 24 corresponding to the above-mentioned protruding parts 22, 22, and is configured to vertically drive the elevating plate 26, that is, the elevating frame 21 by the forward / backward movement of the cylinder 23. Has become.

The front-rear moving frame 22 has two parallel front and rear moving plates 31, 31. The lower part of each front-rear moving plate 31 on the outer surface side is guided by the guide rollers 28 of the lifting frame 21. A guide rail 32 is provided. The cylinder rod tip portion 29a of the forward / backward moving frame drive cylinder 29 is connected to the forward / backward moving plate 31 corresponding to the elevating plate 26 on the side on which the forward / backward moving frame drive cylinder 29 is attached via a connecting member 33. . Further, a plurality of mold receiving rollers 34 are arranged side by side in the longitudinal direction of the front-rear moving plate 31 at upper portions near both ends of the front-rear moving plate 31, 31 to form mold mounting portions 38, 39, respectively. There is.

Front-rear moving plate connected with front-rear frame driving cylinder 29
The mold mounting parts 38, 39 on the inner surface side of 31 are provided with mold clamping devices 35, 35 for clamping the movable mold 14 mounted on the mold mounting parts 38, 39 from the left and right direction. Has been.
This mold clamping device 35 includes clamp claws 36, 36 pivotally mounted on the front-rear moving plate 31, and clamp claws 36.
It consists of a clamp cylinder 37 that opens and closes 36. In addition, the front and rear moving plates 31, 31 at both ends of the mold placing parts 38, 39
A concave portion 40 ... Is formed in the upper part of the mold, and the fixed side mold 12 and the movable side mold 14 on the mold placing parts 38 and 39 are formed in the concave part 40.
Rough guide 41 that determines the approximate position in the front-back direction of
Is provided. Further, between the both ends of the die mounting portions 38, 38, 39, 39 corresponding to both the front and rear moving plates 31, 31, the die
There are provided die facing direction guide devices 42 ... Which set 12 and 14 at substantially predetermined positions in the front and rear of the facing direction. The mold facing direction guide device 42 includes guide claws 43, which guide the mold.
43, and a guide claw drive cylinder 44 that drives the guide claws 43, 43 to open and close. The mold clamping device 35 and the mold facing direction guide device 42 constitute a gripping device.

In the above configuration, when the core 6 is molded by the molding machine 1, first, the front-rear moving frame 22 in the mold carrying bar device 20, for example, the mold mounting portion 39 is moved up and down.
And move to be arranged in the second die changing station 47. Next, the fixed-side mold 12 and the movable-side mold 14 are mounted on the mold mounting portion 38 of the front-back motion frame 22. The molds 12 and 14 are fitted and held by an engagement device (not shown) provided between them. The engagement device is adapted to be released in association with the gripping operation of the movable mold 14 by the movable vice 15 of the molding machine 1. The rough positions of the molds 12 and 14 placed on the mold placing part 38 are determined by the rough guides 41 ... Before and after the die facing direction on the mold placing part 38. Further, by driving the die facing direction guide device 42, 42,
43 ... Set the molds 12 and 14 at substantially predetermined positions in the front-rear direction and at the same time, the mold clamp device 35 clamps the movable mold 14 from the side. After that, the front-rear moving frame drive cylinder 29 moves the front-rear moving frame 22 to move the mold.
12 ・ 14 is the specified position 46 just below the mold placement part in the molding machine 1.
To place. Then, using the lifting device 25, the lifting frame 21
And dies 12 and 14 are fixed side vise in the molding machine 1.
It is placed between 13 and the movable vice 15. At this time, the mold
12 and 14 are at the center 48 of the mold carrier.

Next, the fixed side mold 12 is held by the holder 13a and the clamp claws 13b and 13b of the fixed side vise 13, and the movable side mold 12 is held.
14 is gripped by the clamp claws 15a and 15a of the movable side vise 15. Here, the engagement device between the molds 12 and 14 is released in conjunction with the gripping operation by the movable side vice 15. Then, by pushing the molds 12 and 14 toward the fixed-side mold 12 with the movable-side vise 15, the molds 12 and 14 are centered on the mold carrier.
Move from 48 to core molding center 49. After that, mold 12 ・ 14
The upper mold 5 and the casting sand supply device 17 are arranged on the upper side, and the casting sand supply device
Molding of the core 6 is performed by charging the molding sand 12 and 14 with sand from the blow tank 17a of 17 with compressed air.

When the molding of the core 6 is completed, first, the upper mold 5 is removed,
After the movable side mold 14 is moved backward by the movable side vise 15 to open the mold, the fixed side mold inversion drive device 18 rotates the rotating shaft 18a.
-Movable mold 14 is rotated upward about 18a and placed horizontally. Then, the core 6 is pushed upward by the eject pin provided in the fixed-side die 12. Next, the fork 8 of the core take-out device 7 is driven to move the fork 8 to the core 6.
The core 6 is supported by passing through the hole of the above and taken out from the fixed side mold 12.

When the core 6 has been taken out, the fixed-side mold 12 is rotated to return it to its original vertical state so as to face the movable-side mold 14, and the movable-side mold 14 is moved to move it to the fixed-side mold 12. Mating. Then, when the core 6 is continuously molded by the same molds 12 and 14, the upper mold 5 is arranged as described above, and the subsequent operation is repeated.

Next, when molding the core 6 with another mold,
The molds 12 and 14 are moved and placed at the center 48 of the mold carrier.
Then, while releasing the grip by the fixed side vise 13 and the movable side vise 15 with respect to the molds 12 and 14, the mold transfer bar device
The molds 12 and 14 are held by the mold clamping device 35 and the mold facing direction guide devices 42 and 42 on the forward and backward movement frame 22 of 20. At this time, both molds 12 and 14 are fitted and held by the engagement device. Next, the lifting frame 21 is lowered,
As shown in FIG. 4, a new die is placed on the die placing section 38. At this time, the die mounting portion 39 of the front-back movement frame 22, that is, the new die is in the first die changing station 45.
Then, the forward / backward movement frame 22 is moved to arrange a new mold at the specified position 46, and at the same time, the molds 12 and 14 are carried out to the second mold changing station 47. After that, the unnecessary molds 12 and 14 are removed from the mold placing portion 39 of the front-back motion frame 22, while the lifting frame 21 is raised to move the mold 12
・ Core 6 with new mold by the same process as 14
Molding.

〔The invention's effect〕

As described above, the mold exchanging device of the molding machine of the present invention is provided below the mold disposing part of the molding machine, and is a mold conveying bar for conveying the mold for molding to the mold disposing part. A mold exchanging device for a molding machine provided with a device, wherein the mold conveying bar device has at least two mold mounting portions on an upper surface side,
In addition, each die mounting portion has a gripping device for positioning and holding the placed die and releasing it, and is movable up and down, and each die mounting portion is provided with a die in a molding machine. It is configured to be movable back and forth so as to be arranged immediately below the section. Therefore, the old and new molds can be transferred at the same time when the molds are replaced, and the gripping device can accurately and easily position the molds mounted on the mold mounting portion. . As a result, the time required for die replacement can be shortened, and the movable ratio of the molding machine can be improved.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a side view of the same, and FIGS. 3 and 4 are a plan view and a front view of the mold transfer bar apparatus shown in FIG. . DESCRIPTION OF SYMBOLS 1 is a molding machine, 6 is a core, 12 is a fixed side mold, 14 is a movable side mold, 20 is a mold carrying bar device, 21 is a vertical movement frame, 22 is a longitudinal frame, 23 is a cylinder, 25 is Elevating device, 26 is an elevating plate, 28 is a guide roller, 29 is a front-rear frame driving cylinder, 31 is a front-rear moving plate, 32 is a guide rail, 34 is a mold receiving roller, and 35 is a mold clamping device (grasping device). , 36 is a clamp claw, 37 is a clamp cylinder, 38 and 39 are mold mounting parts,
41 is a rough guide, 42 is a guide device (grasping device) facing the mold, 43 is a guide claw, 44 is a guide claw drive cylinder, 45 is a first mold changing station, 46 is a prescribed position, and 47 is a second position.
The die changing station, 48 is the die carrier center, and 49 the core molding center.

Claims (1)

[Claims] 1. A mold exchanging device for a molding machine, which is provided below a mold arranging portion of a molding machine and includes a mold transfer bar device for conveying a mold for molding to the mold arranging portion. The above-described mold transport bar device has at least two mold mounting portions on the upper surface side, and each of the mold mounting portions holds positioning and holding of the mounted molds and release thereof. A molding machine having a gripping device for performing the lifting and lowering movement, and being provided so as to move back and forth so that each die mounting portion is arranged immediately below the die arrangement portion in the molding machine. Mold changer.