JP2741163B2 - Simple mold changer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold clamping device for a molding machine, and more particularly to a mold exchanging device.

[0002]

2. Description of the Related Art Conventionally, to set a mold in a molding machine,
Various types of cranes capable of three-dimensional movement, such as jib cranes, portal cranes, or hoist-type overhead cranes, are used as mold changing devices. For example, a combination of a chain block for lifting a mold and a trolley for moving the chain block in a horizontal direction is used. However, at present, the above-described mold changing apparatus is provided only in full-scale factory equipment.

[0003]

For this reason, if there is a mold exchanging device that operates in a three-dimensional direction, such as various cranes, as a factory facility, the mold exchanging work of the molding machine becomes easy, but the mold exchanging work is difficult. In the case of factories that do not have this type of crane as an existing facility, or exhibition halls where the equipment used is limited, it is difficult to replace the mold because of the lack of sufficient distance, etc. However, there is a problem in that providing a mold changing apparatus that operates in a three-dimensional direction is extremely expensive. The present invention has been made in view of the above circumstances, and an object thereof is to provide a mechanism for hanging / lifting a mold on a mold clamping device of a molding machine in a detachable manner, An object of the present invention is to provide a simple mold changing device.

[0004]

In order to achieve the above-mentioned object, the present invention provides a portal type in which a beam member is erected above a pair of columns and a chain block is suspended below the center of the beam member. It consists of a frame and a required installation plate that is attached to the lower ends of both columns long in the front-rear direction. A simple mold changing device provided with a recess is provided.Furthermore, a simple mold changing device in which the pair of struts and the beam member are connected by bolts so that the strut spacing can be adjusted according to the tie bar spacing is provided. Make up.

[0005]

According to the present invention, with the above structure,
If the mold attached to the mold clamping device is placed at the product dropout using existing equipment such as a pallet truck or a forklift together with the mold table on which the mold is placed, the hook on the free end of the chain block can be used. After being lowered to the product drop port, the mold is lifted and moved to an intermediate position between the movable platen and the fixed platen. Centering is performed, the bolt is fixed, and the movable platen is advanced at a very low speed to bring the mold into close contact with the fixed platen, thereby completing the mold mounting operation.

Therefore, by adjusting the interval between the columns of the portal frame to correspond to the interval between the tie bars of the mold clamping device, the portal frame is laid over the tie bar receiving groove of the installation plate at the lower end of the column, on the tie bar. The chain block suspended from the beam member of the portal frame is positioned so that the free end side hook of the chain block can be moved up and down at the product dropping port, and the upper and lower sides related to the hanging / lifting operation of the mold are performed. Since the directional movement is performed and the others can be dealt with by the existing equipment, a die changing apparatus is realized at low cost. The mold removal operation is performed in the reverse order.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail.
1 to 3 show an embodiment of the present invention, and reference numeral 1 denotes a mold clamping device of a molding machine according to the present invention. Base B
Fixed board 2 standing on a movable board 3 movable on a base
Are configured to face each other via tie bars 4 at the four corners. Reference numeral 5 denotes a product drop port, which is also used as a mold changing port in the present invention. The simple mold exchanging device of the present invention includes a portal frame 10 laid between tie bars 4 and 4 which are parallel to the horizontal direction, and a chain block 20 having the portal frame 10 as a base.

The portal frame 10 includes a pair of columns 11, 11 set to be equal to the tie bar interval, a beam member 12 erected above the columns, and a required installation plate long attached to the lower ends of both columns in the front-rear direction. 13 and an installation board 1
3 has a tie bar receiving groove 13 which is recessed in the longitudinal direction.
a is formed so as to be laid on the tie bars 4 and 4 in a stable state. Reference numeral 14 denotes a support plate that reinforces the connection between the column and the installation plate. The tie bar receiving groove 1
3a, a mold clamping device having a tie-bar diameter different from that of the tie-bar can be fitted to the tie-bar, even if the tie-bars have different diameters.
Is a fixed platen 2 on the tie bars 4, 4 in the mold clamping device 1.
And the movable platen 3.

Further, as shown in FIG.
In the beam member 12 erected on the upper part, the chain block 20 is suspended from the center lower side, and elongated holes 12a extending in the length direction are formed at both ends, and the shaft portion is formed by the length. By being configured to be fixed via the bolt 15 penetrating the hole, it can be installed even in a mold clamping device having different tie bar intervals. This makes it possible to adjust the interval between the columns 11 and 11 and the beam member 12 in accordance with the interval between the tie bars 4 and 4. The chain block 20 suspended from the beam member 12 is positioned substantially at the center between the columns. The free end hook 20a is installed so as to be able to move up and down at the product drop port 5. Although illustration is omitted, for example, H steel may be used horizontally for the beam member 12, and in this case, the elongated hole 12a described above is provided at a position corresponding to the column 11 of the flange portion of the H steel. Form each.

Further, in the movable platen 3, the fixed platen 2
The positioning block 3a of the mold is mounted on the surface opposite to the mold so as to facilitate the centering of the mold, and the distance L1 between the fixed platen 2 and the fixing plate 2 is set to an appropriate margin according to the size of the mold to be used. And spread it out. As described above, in the present invention, the product dropping port 5 also uses the mold changing port, and at the time of attaching the mold to the mold clamping device 1, the mold 6 to be used is put on the mold table 7 in advance. They are arranged by appropriate transportation means.

As a result, the free end hook 20a of the chain block 20 attached to the portal frame 10 is lowered to the product drop port 5, and the free end hook 20a
The fixed plate 2 and the movable plate 3
If it is lifted to the position facing the above, the work of attaching the mold to the mold clamping device 1 and the work of clamping the mold can be performed.

In the mold mounting operation and the mold clamping operation, first, the operation mode of the molding machine is set to the "mold mounting mode", and the movable platen 3 is lifted to the die 6 suspended to the position facing the fixed platen 2. At a very low speed to narrow the gap with the mold (L2
), The mold 6 is centered by the positioning block 3a, the mold 6 is fixed to the movable platen 3 with bolts, and after the mold is fixed, the free end side hook 20a of the chain block is fixed to the metal part 6a of the mold. Release the free end hook 20
Pull a upward.

Next, the movable platen 3 is further moved at a very low speed toward the fixed platen 2 to bring the mold 6 into close contact with the fixed platen 2. Here, the operation mode of the molding machine is set to "high-pressure mold clamping", the mold 6 is brought into the mold clamping state, and the mold 6 is fixed to the fixed platen 2 with bolts, and the operation is completed.

The tie bar 4 has a sufficient rigidity since a load of several tens to hundreds of tons is applied at the time of mold clamping, and has a weight of 0.5 ton or less. There is no strength problem in using it as a support for the gate-shaped frame 10 that hangs most molds.
During the operation of the molding machine, the gate type frame 10 is constructed such that the length W of the installation plate 13 is shorter than the minimum distance of the movable platen 3 from the fixed platen 2, that is, the mold having the smallest dimension used. However, there is no need to remove the tie bar 4 from above. However, since the mold exchanging apparatus is small and lightweight, it can be manually attached to and detached from a molding machine, and can be used for a plurality of molding machines in a factory, for example. It is.

Therefore, existing equipment such as a pallet truck or a forklift can be used as a transport means for disposing the mold 6 at the product drop port 5.
A simple mold changing device is realized.

[0016]

As described above, according to the present invention,
It consists of a portal frame in which a beam member is erected on the upper part of a pair of columns and a chain block is suspended below the center of the beam member, and a required installation plate which is attached to the lower ends of both columns long in the front-rear direction, While setting the column interval of the portal frame equal to the tie bar interval, a tie bar receiving groove is provided in the longitudinal direction of the back surface of the installation plate, and furthermore, the pair of columns and beam members are arranged at the tie bar interval. By configuring a simple mold exchanging device which is connected by bolts so that the distance between the columns can be adjusted according to the requirements, it is possible to suspend the mold in the mold exchanging operation.
Only by configuring a device that enables vertical movement related to the lifting operation, the other components can be accommodated by existing equipment, so that a die changing device that can be used for various types of molding machines can be realized at low cost. In other words, the present invention has an excellent effect of being particularly effective in small factories and exhibition halls without crane facilities.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a side view showing an embodiment of the present invention in a longitudinal section.

FIG. 3 is a plan view showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Gate frame 11 ... Prop 12 ... Beam member 12a ... Slot 13 ... Installation plate 13a ... Tie bar receiving groove 14 ... Support plate 15 ... Bolt 20 ... Chain block 20a ... Free end Side hook 1 Mold clamping device 2 Fixed plate 3 Movable plate 3a Positioning block 4 Tie bar 5 Product drop-out port (mold exchange port) 6 Mold 6a Metal fitting part

Claims (2)

(57) [Claims] 1. A portal frame in which a beam member is erected above a pair of columns and a chain block is hung below the center of the column, and a required installation which is long attached to lower ends of both columns in the front-rear direction. A simple mold exchanging device comprising a plate, wherein a column interval of the portal frame is set to be equal to a tie bar interval, and a tie bar receiving groove is recessed in a longitudinal direction on a back surface of the installation plate. 2. The simple mold exchanging apparatus according to claim 1, wherein the pair of columns and the beam members are connected by bolts so that the column intervals can be adjusted according to the tie bar intervals.