JP3114944B2 - Automatic mold changing method in molding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of automatically exchanging a mold for removing a mold from an injection molding machine and mounting a new mold.

[0002]

2. Description of the Related Art As a conventional automatic mold changing apparatus, a traveling rail is arranged on a front side or a rear side of an injection molding machine in a direction coinciding with an axis of a tie bar. A loading trolley equipped with a loading and unloading roller conveyor capable of transporting in the direction of movement is provided so as to be able to run by itself.

[0003] Also, a number of supporting members corresponding to the conveying surfaces of a carry-in and carry-out roller conveyor and respective dies to be mounted are mounted on the fixed and movable mounting plates of the injection molding machine at the upper portion of the mounting plate. And a clamp member forming a mold fixing member for fixing the lower portion.

[0004] When the mounting carriage on which the pair of dies is mounted is moved to the die changing position, first, the die take-out member is moved to move the pair of dies supported on the supporting member of the forming part. After engaging with the mold, the take-out member is moved back and taken out onto the carry-out roller conveyor, and then the pushing member locked to the pair of molds to be mounted next is moved to carry the carry-in roller conveyor. The upper pair of dies is transferred onto a support member and fixed by a clamp member.

[0005]

However, in the above-mentioned conventional automatic die changing apparatus, the push-out member and the take-out member must be moved so as to extend between the support member and the carry-in roller conveyor and the carry-out roller conveyor. In addition, there is a problem that the moving stroke of these members becomes long, the driving mechanism thereof becomes complicated, and the mounting cart becomes expensive.

[0006] The positioning of the mold with respect to the molding portion is as follows.
This problem can be solved by attaching the positioning members to the fixed-side and movable-side mounting boards, respectively. However, it is difficult to attach the positioning members to the formed portion of the narrow space, and the movable-side mounting board is particularly heavy and the movement response is poor. Problems.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned conventional drawbacks, and an object of the present invention is to provide a high positioning accuracy without providing a mold moving member on a mounting cart. It is an object of the present invention to provide a method for automatically changing a mold in a molding machine capable of taking out a mold and mounting a new mold.

It is another object of the present invention to provide a method for automatically changing a mold in a molding machine, which can reduce the cost of the automatic mold changing system.

[0009]

SUMMARY OF THE INVENTION Therefore, according to the present invention, a supporting member and a mold fixing member are mounted on a fixed-side mounting plate and a movable-side mounting plate of a molding machine, respectively. A loading machine and an unloading device are mounted in parallel on a loading trolley arranged so that it can move in the direction of movement of the movable-side mounting board so that it can be transported in a direction perpendicular to the direction of movement of the movable-side mounting board. After taking out a pair of dies on the unloading device from the unloading device, the pair of dies on the carry-in device are loaded into the molding unit and mounted. Alternatively, a locking member is attached to a traveling frame movably supported in the longitudinal direction on a main body frame formed to have a length extending from the back side to above the mounting cart, and the locking member is supported on the supporting member. After being locked to a part of the mold and pulled out from the molding unit onto the unloading device on the loading trolley and transferred, it is locked to a part of the die on the loading device and pushed out onto the support member and transferred. It is characterized in that the dies are automatically replaced by being mounted.

[0010]

Since the present invention is configured as described above,
The loading cart is self-propelled and its unloading device is positioned at the molding section of the injection molding machine.

In this state, the traveling body is moved and the locking member is engaged with the pair of dies supported on the support members of the fixed side and the movable side mounting boards. The pair of dies are transferred from the unit to the unloading device and taken out.

Next, after the loading cart is self-propelled and its loading device is positioned at the molding section, the traveling body is controlled to move and is locked to a pair of dies to which a locking member is to be mounted. Then, the traveling body is controlled to move, and the mold on the loading device is transferred to and mounted on the support members of the fixed and movable mounting plates.

[0013]

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

FIG. 1 is an overall perspective view showing an outline of an automatic mold changing method.

FIG. 2 is a perspective view showing opposing surfaces of the fixed side and movable side mounting boards.

On the main body frame 3 of the injection molding machine 1, a fixed mounting plate 9 and a support plate 6 which face each other at a predetermined interval.
Are mounted, and four tie bars 7 having axes in the longitudinal direction of the main body frame 3 are mounted at diagonal positions between the fixed-side mounting board 9 and the support board 6.

An injection device 11 is mounted on the main body frame 3 located on the fixed-side mounting plate 9 side. An injection screw (not shown) of the injection device 11 has a through hole (not shown) formed at the center of the fixed-side mounting plate 9. (Not shown).

A large number of support rollers 13 as support members are rotatably supported in a direction perpendicular to the axis of the tie bar 7 on the fixed mounting plate 9 slightly above the tie bar 7 located below. I have.

A clamp device 15 as a mold fixing member is mounted on the fixed mounting plate 9 corresponding to the space between the support rollers 13 and the upper portion of the fixed mounting plate 9 facing the support roller 13.

The clamping device 15 is provided with a cylinder 15
a, and an engagement claw 15b attached to the rod. The engagement claw 15b is engaged with the mold plate of the molds 53, 55, 57, 59 by the operation of the cylinder 15a.

Note that hooks 54 and 58 are attached to the side surfaces of the dies 53 and 57, respectively, for engaging the locking members 35 described later.

A movable mounting plate 17 is supported on each tie bar 7 so as to be movable in the axial direction. The movable mounting plate 17 has a mold clamping cylinder 18 mounted on the main body frame 3.
Are connected.

The movable mounting plate 17 facing the fixed mounting plate 9 has a large number of support rollers 19 and clamp devices 21.
Are mounted in a relationship facing the support roller 13 and the clamp device 15 of the fixed-side mounting board 9.

A main body frame 25 is attached to the fixed-side mounting board 9 of the injection molding machine 1 so as to be orthogonal to the axis of the tie bar 7 and to extend from a molding portion of the injection molding machine 1 onto a mounting carriage 43 described later. I have.

A traveling body 27 is supported on the main body frame 25 so as to be movable in the longitudinal direction, and a driving member (not shown) is connected to the traveling body 27.

The driving member may be any known mechanism such as a conventionally known cylinder, rack and pinion mechanism, nut and feed screw.

An engaging member 35 is attached to the traveling body 27. A hook portion 35a constituting a locking portion is rotatably supported by the locking member 35, and a cylinder 35b as a locking drive member is connected to the hook portion 35a.

The operation of the cylinder 35b locks the hook portion 35a on the locked portions 54, 58 attached to the side surfaces of the dies 53, 57.

The shape of the locking member 35 is not limited to the shape of this embodiment.

A pair of running rails 41 are arranged on the front floor of the injection molding machine 1 so as to extend in the axial direction of the tie bar 7.

A mounting carriage 43 is attached to the traveling rail 41 so as to be able to run in the longitudinal direction by itself.

The loading and unloading roller conveyors 45 and 47 constituting the loading and unloading devices can be transported in the direction orthogonal to the axis of the tie bar 7 on the upper surface of the loading cart 43, respectively.・ Attached in parallel with the 19 supporting surfaces.

Fixed side mounting board 9 and movable side mounting board 1
7, connection rollers 49 and 51 are attached so as to coincide with the transport surfaces of the roller conveyors 45 and 47 for loading and unloading.

A stopper device (not shown) is attached to the loading carriage 43 corresponding to the loading and unloading roller conveyors 45 and 47, and the dies placed on the respective roller conveyors 45 and 47. 53 ・ 55、57 ・
59 is locked to a part to regulate the movement.

Next, a method of automatically changing a mold in the molding machine having the above-described structure will be described.

FIG. 3 is a schematic perspective view showing a state in which a pair of dies is being taken out. FIG. 4 is a schematic perspective view showing a state in which a pair of dies to be replaced are being carried in.

FIG. 5 is a front view showing a state where the mold is mounted on the fixed-side mounting board.

After the loading cart 43 is moved by itself and the unloading roller conveyor 47 is positioned in front of the molding section of the injection molding machine 1, the operation of the clamping devices 15 and 21 is released to attach the fixed and movable sides. Mold 53 for boards 9 and 17
55 is released.

At this time, the unloading roller conveyor 47
And connecting rollers 49 and 51 and supporting rollers 13.1
9 is the same as the transfer surface. Also, a pair of molds 53
55 is mounted on the support rollers 13 and 19 in a mold matching state.

Next, after the traveling body 27 is moved to the front side of the pair of molds 53 and 55 in the above state, the cylinder 35b
Is operated to lock the hook portion 35a with the locked portion 54 of the pair of dies 53 and 55.

After the above operation, the traveling body 27 is moved to the front side of the injection molding machine 1 and the pair of dies 53 and 55 placed on the support rollers 13 and 19 is moved out of the roller conveyor 4.
7, the cylinder 35b is moved back to release the locked state of the hook 35a with the locked part 54, and the take-out is completed.

At this time, the position control from the support rollers 13 and 19 to the carry-out roller conveyor 47 is performed by controlling the movement of the traveling body 27.

Next, in this state, the carriage 43 is self-propelled so that the carry-in roller conveyor 45 coincides with the forming section.
Is moved to the front side of the pair of dies 57 and 59 to be mounted, and then the cylinder 35b is operated to operate the hook portion 35.
a is locked to the locked portions 58 of the molds 57 and 59 to be mounted.

At this time, the carry-in roller conveyor 45
And connecting rollers 49 and 51 and supporting rollers 13.1
9 coincides with the transfer surface.

In the above state, the traveling body 27 is moved to the back side of the injection molding machine 1 and a pair of dies 57 and 59 to be mounted are mounted.
Is extruded onto the support rollers 13 and 19 and the support roller 1
After the transfer to the position 3.19, the cylinder 35b is moved back to release the locked state of the hook portion 35a with the locked portion 58.

At this time, the position control of the pair of dies 57 and 59 with respect to the fixed-side mounting board 9 and the movable-side mounting board 17 is performed by controlling the movement of the traveling body 27.

Next, the clamp devices 15 and 21 are operated to fix one mold 57 to the fixed-side mounting plate 9 and fix the other mold 59 to the movable-side mounting plate 17, respectively.

As described above, in this embodiment, after the traveling bodies 27 on the main body frame 25 provided in the injection molding machine 1 are respectively moved in the longitudinal direction and the dies 53 and 55 are taken out from the injection molding machine 1, The new molds 57, 59 can be mounted on the injection molding machine 1 and the molds 53, 55, 57, 59 can be automatically replaced.

At this time, a pair of dies 53 and 55 to be taken out from the carry-out roller conveyor 45 by controlling the movement of the traveling body 27 and the support roller 13
・ A pair of molds 57.5 to be mounted on the top of 19
9 can be automatically exchanged by moving it with high positional accuracy.

In the above description, the hook 35a and the cylinder 35b are provided on the locking member, and the hook 35a is disengaged from the locked portions 54 and 58 by the operation of the cylinder 35b, as shown in FIG. As described above, the locking member 73 is attached to the traveling body 27 via the cylinder 71 as a vertical driving member, and the cylinder 71 is operated to move the locking member 73 in the vertical direction so that the locking members for the locked portions 54 and 58 are locked. 73 may be engaged and disengaged.

Similarly, as shown in FIG. 7, the locking member 8 is attached to the traveling body 27 via a cylinder 81 as a front and rear driving member.
3 and the locking member 8 is operated by the operation of the cylinder 81.
3 may be moved in the front-rear direction to engage and disengage the locking member 83 with respect to the locked portions 54 and 58.

[0052]

As described above, according to the present invention, there is provided a mold automatic machine in which a mold can be taken out and mounted with high positional accuracy without providing a mold moving member on a mounting cart. It is possible to provide an exchange method.

Further, the present invention can provide a method of automatically changing a mold in a molding machine which can reduce the cost of the automatic mold changing system.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing a method for automatically changing a mold.

FIG. 2 is a perspective view showing opposing surfaces of a fixed-side and a movable-side mounting board.

FIG. 3 is a schematic perspective view showing a state in which a pair of molds is being taken out.

FIG. 4 is a schematic perspective view showing a pair of molds to be exchanged while the molds are being mounted.

FIG. 5 is a front view showing a state in which a mold is mounted on a fixed-side mounting board.

FIG. 6 is an explanatory diagram showing a modified embodiment of the present invention.

FIG. 7 is an explanatory view showing a modified embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Injection molding machine, 9 Fixed side mounting board, 13/15 Support roller as a support member, 15/21 Clamp member as mold fixing member, 17 Movable side mounting board, 25
Main body frame, 27 traveling body, 35 locking member, 35
a Hook portion as a locking portion, 35b Cylinder as a driving member, 53, 55 A pair of dies to be taken out, 57, 59 A pair of dies to be mounted

Continuation of the front page (56) References JP-A-57-201636 (JP, A) JP-A-56-131056 (JP, A) JP-A-63-130327 (JP, A) JP-A-2-30509 (JP, A) JP-A-59-81122 (JP, A) JP-A-54-121919 (JP, U) JP-A-3-29310 (JP, U) JP-A-59-140821 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B29C 45/26-45/44 B21D 37/04 B22D 17/22 B29C 33/00-33/76

Claims (5)

(57) [Claims] 1. A support member and a mold fixing member are respectively attached to a fixed-side mounting plate and a movable-side mounting plate of a molding machine, and can be self-propelled in the moving direction of the movable-side mounting plate on the front side or the rear side of the molding machine. After loading and unloading the loading device and the unloading device on the loading cart arranged in parallel so that they can be transported in the direction perpendicular to the moving direction of the movable side mounting plate, and removing the pair of dies from the molding machine onto the unloading device, In the automatic mold changing method in which a pair of molds on a carry-in device are carried into a molding section and attached, a long side extending from a front side or a rear side of the molding machine to an upper side of a mounting cart is mounted on a fixed side or a movable side mounting plate. A locking member is attached to a traveling frame movably supported in a longitudinal direction on a main body frame formed on the main body frame, and the locking member is locked to a part of a mold supported on the supporting member to form a molding portion. From the loading trolley In a molding machine, the die is automatically replaced by being pulled out onto a carry-out device, transferred, and then locked to a part of the die on the carry-in device, pushed out onto a support member and transferred. Automatic mold change method. 2. A movement control of a traveling body on a main body frame,
2. The method according to claim 1, wherein the pair of dies to be taken out from the carrying-out member and the pair of dies to be mounted on the support member can be positioned. 3. The locking member comprises a locking portion and a driving member, and the driving portion drives the locking portion to open and close, thereby enabling the locking member to be disengaged from the mold. Automatic mold changing method in a molding machine. 4. A locking member is attached to a traveling body via a vertical driving member, and the locking member is vertically displaced by driving the vertical driving member so that the locking member can be disengaged from the mold. 2. A method for automatically changing a mold in a molding machine according to claim 1. 5. A locking member is attached to a traveling body via a front and rear driving member, and the locking member can be disengaged from a mold by moving the locking member in the front and rear direction by driving the front and rear driving member. 2. A method for automatically changing a mold in a molding machine according to claim 1.