JP2573451Y2 - Mold positioning structure 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 mold positioning structure for a molding machine.

[0002]

2. Description of the Related Art When a mold is mounted on a molding machine, the center of the loaded mold is aligned with the machine center of the molding machine so that the injection nozzle is aligned with the center of the mold to enable stable molding. There is a need.

[0003] As the positioning structure, a knock pin is mounted on the mounting board so as to be vertically movable, and a pilot hole or a notch for inserting the knock pin is formed in a mold in advance so that the mold is carried into the molding machine. The center of the two is matched by inserting the upwardly moving knock pin into the pilot hole.

[0004]

However, in the above-described conventional positioning structure, a pilot hole or a notch must be fixedly provided at a predetermined position of a mold to be used in advance, and such a fixed pilot hole is required. Alternatively, mounting a notched mold on another molding machine has a problem that the flexibility of the mold is deteriorated.

If the knock pin does not match the pilot hole or the notch, the operator moves the mold supported on the molding machine as needed to make the two approximately coincide, and then moves the knock pin to the pilot hole or the notch. The positioning workability was poor.

The present invention has been devised in order to solve the above-mentioned drawbacks of the prior art. The purpose of the present invention is to provide a simple configuration for maintaining the flexibility of the mold itself while maintaining the flexibility of the mold itself. The center and the machine center of the molding machine can be accurately positioned, and even if the center of the mold and the center of the molding machine are slightly displaced when the mold is loaded, they are automatically positioned to improve workability. It is an object of the present invention to provide a mold positioning structure in a molding machine.

[0007]

SUMMARY OF THE INVENTION For this reason, the present invention provides a molding machine which supports a mold on a support member provided on the mold mounting board and enables mounting. Having an engagement hole of a predetermined width formed movably supported between the upper part of the mold supporting surface and the lower part of the mold supporting surface, and having a tapered part which is inclined downward toward the middle part on both upper sides. A mating member and an engaged member provided in the mold and capable of protruding into the engaging hole, and the mechanical center of the molding machine is formed by inserting the engaging hole of the engaging member into the engaged member. And the center of the mold.

[0008]

[Operation of the present invention] Since the present invention is configured as described above,
After supporting the mold to be mounted on the support member of the mold mounting board, the engaging member is moved upward. In this state, if the center of the mold does not coincide with the center of the mold mounting board, the tapered surface of the engaging member that moves upward with respect to the engaged member attached to the mold slides on the mold. The engaged member is inserted into the engagement hole while the mold is slightly moved. Thereby, the positioning is performed so that the center of the mold and the center of the mold mounting board coincide.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention applied to a molding machine employing a mold changing system will be described below with reference to the drawings.

FIG. 1 is a schematic perspective view showing an outline of an automatic mold changing system.

FIG. 2 is a schematic perspective view showing a supporting and fixing structure of the mold.

FIG. 3 is a schematic front view showing the positioning mechanism.

A fixed-side mounting board and supporting boards 5.7 opposed to the main body frame 3 of the molding machine 1 at a predetermined interval.
Is fixed, and four tie bars 11 each having an axis in the longitudinal direction of the main body frame 3 are suspended between the fixed-side mounting board and the supporting boards 5 and 7, and the movable-side mounting board 13 is axially mounted on the tie bar 11. It is supported so that it can move to. A mold clamping cylinder 15 attached to the main body frame 3 is connected to the movable side mounting board 13.
The movable side mounting board 13 is moved between the mold clamping position and the mold release position by the operation of.

The two tie bars 11 located below the fixed-side mounting board 5 have a support frame 17 (FIG. 2 shows the mounting state of the support frame 17 on the fixed-side mounting board 5; The same is true for
(Not shown) are supported and fixed to the respective fixed-side mounting boards 5 by bolts 19.

The tie bars 11 are provided on both sides of the support frame 17.
The support recesses 17a coincide with the outer peripheral surface of the tie bar 11. When the respective support concave portions 17a are supported on the outer peripheral surface of the tie bar 11, the upper surface of the support frame 17 is positioned so as to be horizontal.

A plurality of support rollers 21 are attached to the upper portion of the support frame 17 at a predetermined interval in a direction perpendicular to the machine center of the main body frame 3 with its outer peripheral upper surface slightly protruding from the upper surface of the support frame 17. I have. Also,
Two hydraulic clamp members 2 are provided on both sides of the support frame 17.
3 are respectively fixed so as to be located between the support rollers located on both sides.

An engaging member 29 having a U-shaped engaging hole 29a at the front portion of the support frame 17 and a tapered surface 29b inclined downward toward the center at the upper portion is provided on the support frame 17. The engagement member 29 is supported so as to move between an upper position protruding from the upper surface and a lower position below.
A cylinder 31 attached to the support frame 17 is connected to the lower end of the cylinder.

At the top of the fixed-side mounting board 5, a mounting block 33 (FIG. 2 shows the mounting state of the mounting block 33 on the fixed-side mounting board 5, but the same applies to the movable-side mounting board 13; (Not shown) is fixed by bolts 35, and 2
Hydraulic clamp members 37 are located on the lower hydraulic clamp member 2.
3 and is fixed. These hydraulic clamp members 23 and 37 are disclosed, for example, in Japanese Utility Model Laid-Open Publication No. Sho 64-10330, Japanese Utility Model Laid-Open Publication No. 2-73316, Japanese Utility Model Laid-Open Publication No. 2-733.
As shown in Japanese Patent Publication No. 17, the structure is such that the clamp claws are protruded by the supplied pressure oil, and are fixed by locking to a part of the molds 25 and 27.

An engaging roller 43 (FIG. 2) constituting an engaged member is provided at a lower intermediate portion between a fixed mold 39 fixed to the fixed-side mounting board 5 and a movable mold 41 fixed to the movable-side mounting board 13. Is an engagement roller 43 for the fixed mold 39
(The same applies to the movable mold 41, not shown), and the engaging roller 43 is formed to have an outer diameter that matches the engaging hole 29a of the engaging member 29. Have been. A stopper 44 having an impact absorbing member is attached to the fixed-side mounting board 5 on the side opposite to the loading side. An engaged portion 39a is attached to one side surface of the fixed mold 39.

A pair of running rails 45 are provided on the front side floor of the molding machine 1 in parallel with the machine center of the main body frame 3.
A mold carrier 47 is provided on the traveling rail 45 so as to be able to run on its own. The carry-out conveyor 49 and the carry-in conveyor 51 are placed on the mold carrier 47.
Is mounted so that it can run in a direction perpendicular to the center of the machine. An unloading hook 53 is mounted on the mold transporting trolley 47 corresponding to the side of the unloading conveyor 49 so as to move in parallel with the unloading conveyor 49.

A carry-in arm 55 is mounted on the mold carrier 47 corresponding to the side of the carry-in conveyor 51 so as to move in parallel with the carry-in conveyor 51.

Connection conveyors 57 and 59 are mounted on side surfaces of the fixed-side mounting plate 5 and the movable-side mounting plate 13 facing the carry-out conveyor 49 and the carry-in conveyor 51 so as to be connectable to the carry-out conveyor 49 or the carry-in conveyor 51. .

Next, the positioning operation of the fixed mold 39 and the movable mold 41 in the molding machine 1 configured as described above will be described.

FIG. 4 is a schematic sectional view showing a non-positioned state of the loaded mold.

FIG. 5 is a sectional view showing the positioning state of the mold.

The traveling of the mold carrier 47 is controlled such that the carry-out conveyor 49 is connected to the connection conveyors 57 and 59 on the side of the molding machine 1. Further, the fixed mold 39 and the movable mold 41 attached to the fixed-side mounting board 5 and the movable-side mounting board 13 are released from the clamped state by the hydraulic clamp members 23 and 37, and
1 is supported on. Further, the engagement member 29 is moved down by the cylinder 31 that moves backward, and the engagement state with the engagement roller 43 is released.

In the above state, the carry-out hook 53 is moved to the fixed mold 39 and the movable mold 41 supported on the support roller 21 to engage with the engaged portion 39a.
3 is pulled back, a pair of fixed molds 3
9. The movable mold 41 is taken out on the carry-out conveyor 49.

Next, in the above-described state, after controlling the traveling of the mold carrier 47 so that the carry-in conveyor 51 and the connection conveyors 57 and 59 coincide with each other, a combination placed on the carry-in conveyor 51 for mounting is carried out. When the carry-in arm 55 contacting the side surface of the pair of fixed mold 39 ′ and movable mold 41 ′ is moved toward the molding machine 1, the fixed mold 39 is moved.
The movable mold 41 'is carried onto the support roller 21 via the connection conveyors 57 and 59, and is stopped by contact with the stopper 44.

At this time, when the center of the fixed mold 39 ′ and the movable mold 41 ′ supported on the support roller 21 and the mechanical center of the main body frame 3 are not aligned,
As shown in FIG.
9 is moved to the upper position, the engaging member 29 abuts on the tapered surface 29b with the engaging roller 43 to slightly move the fixed dies 39 'and 41' while engaging the engaging holes 2 with each other.
The engagement roller 43 is inserted into 9a. A pair of fixed mold 39 'and movable mold 41' combined in this state
And the center of the molding machine 1 are aligned.

Next, in the above state, the hydraulic clamp member 23
By driving the hydraulic clamp member 37 and engaging the clamp claws with the upper and lower portions of the fixed mold 39 ′ and the movable mold 41 ′, the fixed mold 3
9 'and the movable mold 41' is fixed to the movable side mounting plate 13.

When the centers of the loaded fixed mold 39 'and movable mold 41' coincide with the machine center of the molding machine 1, the fixed mold 39 'and the movable mold 41' are inserted into the engaging holes 29a of the engaging member 29. By positioning the engagement roller 43, the positioning of both can be maintained.

As described above, in this embodiment, the fixed mold 39.3 is used.
9 ′, the center of the mold that is carried in by simply attaching the engagement roller 43 and the machine center of the molding machine 1 can be matched without forming a pilot hole or a notch in the movable molds 41, 41 ′. It is possible to improve workability by eliminating post-processing of the mold.

In the above description, the support roller 21 and the hydraulic clamp member 23 are mounted on the support frame 17. However, the support roller 21 and the hydraulic clamp member 23 are directly fixed on the fixed-side mounting plate 5 and the movable-side mounting plate 13. It may have a structure.

Although the above description has described the mold positioning structure of the molding machine employing the automatic mold exchanging system, the present invention is not limited to the molding machine employing the automatic mold exchanging system. However, the case where the mold is replaced is naturally included in the technical scope of the present invention.

In the above description, the hydraulic clamp members 23 and 37 are used as members for fixing the mold. However, a fixing member 70 having the following structure may be used.

For example, FIG. 6 (FIG. 6 shows only the fixed side,
The same applies to the movable side, which is not shown.) As shown in FIG.
The support bolt 75 is mounted below the support surface of the support block 3, and an elongated hole 79 a of a fixed arm 79 movably supported at one end by a slide cylinder 78 mounted on a support block 77 is inserted into the support bolt 75. To be movably supported. A compression spring 81 is attached to the support bolt 75 between the support arm 75 and the fixed arm 79, and constantly biases the fixed arm 79 toward the shaft end. A nut 83 is engaged with the support bolt 75 to which the fixed arm 79 is attached. A cylinder 89 as a reciprocating drive member attached to the support block 77 is connected to an end of the lever 85a. That is, a roller 85b is attached to an end of the lever 85a, and the roller 85b is inserted into the cylinder tube 89a and engaged with a notch 89c formed in the piston 89b. And piston 8
The wrench member 85 is configured to reciprocate around the socket 87 with the reciprocating movement of 9b. The reference numeral 91 in the figure is a switching member for switching the direction of rotation of the socket 87 with the rotation of the wrench member 85.

[0037]

According to the present invention, the center of the incoming mold and the machine center of the molding machine can be accurately positioned while maintaining the flexibility of the mold itself with a simple structure, and the present invention can be applied to the present invention. Even if the center of the mold and the center of the molding machine are slightly displaced at the time of loading, it is possible to provide a mold positioning structure in the molding machine that can automatically position the mold and improve workability.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing the outline of an automatic mold change system.

FIG. 2 is a schematic perspective view showing a supporting and fixing structure of a mold.

FIG. 3 is a schematic front view showing a positioning mechanism.

FIG. 4 is a schematic sectional view showing a non-positioned state of a loaded mold.

FIG. 5 is a sectional view showing a positioning state of a mold.

FIG. 6 is a schematic perspective view showing a modified embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Molding machine 29 Engagement member 29a Engagement hole 29b Tapered surface 39 ・ 41, 39 ′ ・ 41 ′ Mold

──────────────────────────────────────────────────の Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B29C 45/26-45/38 B29C 33/30 B21D 37/14

Claims (2)

(57) [Scope of request for utility model registration] 1. A molding machine to enable the mounting of the mold support to on a support member provided in the mold Installing with Release the mold supporting surfaces above and the mold in the mold mounting plate of the molding machine An engagement member provided with an engagement hole having a predetermined width and having a tapered portion which is movably supported between a lower portion of the support surface and an upper portion on both sides and which is inclined downward toward an intermediate portion; An engaging member protruding into the engaging hole, and inserting the engaging hole of the engaging member into the engaged member so that the mechanical center of the molding machine coincides with the center of the mold. A mold positioning structure, characterized in that: 2. The mold positioning structure according to claim 1, wherein said engaged member comprises an engaging roller having an outer diameter coinciding with said engaging hole.