JPH0367489B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an insert supply device for a mold device in an injection molding machine that molds a molded product having a plurality of inserts. This invention relates to an insert supply device that can automatically supply and insert inserts into a mold while maintaining a constant positional relationship.

Conventionally, when injection molding a molded product having a plurality of inserts, the inserts were manually inserted into a mold. For example, when molding a gear 1 as shown in FIG. 1, a first insert 4 connecting the gear forming part 2 and the boss 3;
The second inserts 5, which serve as shaft bushes to be attached to the bosses 3, are each manually inserted into the molds. However, when inserting the inserts manually, it is difficult to determine the relative positional relationship between the inserts with high precision.
There is a drawback that there is a large variation in shape between molded products, and the above drawback has become extremely serious, especially in ultra-precision injection molding, which has been in increasing demand in recent years.

Moreover, the above-mentioned manual insertion of the insert requires the skill of the operator, and there is also the problem that ordinary operators cannot improve the work efficiency.

The purpose of the present invention is to solve problems such as the inaccuracy of the relative positional relationship between a plurality of inserts in the insert insertion work based on the above-mentioned prior art.
By providing a plurality of jig pallets for positioning the relative positions of the inserts and transporting them sequentially, the above-mentioned drawbacks and difficulties can be eliminated, and the relative positions of the inserts can be adjusted. It is an object of the present invention to provide an excellent insert feeding device that can automatically feed inserts into a mold while always maintaining a constant position.

In accordance with the above object, the present invention has a configuration in which a plurality of jig pallets are placed on a rail and transferred one after another, and a plurality of inserts are respectively placed in the jig pallets at a plurality of locations along the rail. The inserts are placed on the pallet, the relative positions of the inserts are determined, and the plurality of inserts positioned on the pallet are adsorbed onto the suction head while maintaining their relative positional relationship, and then the inserts are placed on the pallet. Transfer into the mold,
The gist of this is that it has been inserted.

Next, an embodiment of the present invention will be described below based on the drawings from FIG. 2 onwards.

2 to 4, a pair of rails 7 are provided on the frame 6, and a large number of jig pallets 8 are placed on the rails 7. An insert placement section 9 is formed on the pallet 8, and the placement section 9 consists of a first insert placement section 9a and a second insert placement section 9b.
A pair of endless conveyors 10 for returning jig pallets are provided below the rails 7.
0 is suspended between a pair of pulleys 11, 11, one of which is rotationally driven by a motor 12.

A first insert supply station 15, a second insert supply station 16, and an insert take-out station 17 are provided along the rail 7.

In the first insert supply station 15, as shown in FIGS. 2 and 4, an elevating plate 20 is provided between the pair of conveyors 10, and the elevating plate 20 is connected to a lifting cylinder 21. and can protrude upward from between the conveyors 10. The elevating plate 20 is provided with a guide bar 22, which slidably passes through the mounting plate 23 of the cylinder 21. and,
The mounting plate 23 is connected to the transfer cylinder 25 via a connecting member 24, and is supported so as to be slidable in the horizontal direction. As shown in FIG. 4, a projection 20a is provided on the upper surface of the elevating plate 20, and it fits into a recess 8a formed on the lower surface of the jig pallet 8 when the elevating plate 20 is raised. Furthermore,
A first insert supply device 26 is provided above the conveyor 10.

Next, the second insert supply station 16
As shown in FIG. 5, a second insert supply means 30 is provided. The supply means 30 has a sliding plate 32 that is slidable in the horizontal direction, and a cylinder 31 for horizontal movement is connected to the sliding plate 32, and a cylinder 33 for vertical movement is attached to the sliding plate 32. There is. The cylinder 33 is connected to a head plate 34, and the head plate 34 moves up and down guided by a guide rod 35 that slidably passes through the sliding plate 32. The head plate 34 is provided with a holding head 36 passing through it, and the holding head 36 is always urged downward by a spring 38 interposed between a stopper 37 and the head plate 34. However, the head 39 at the upper end prevents it from coming out downward. A suction hole 40 is bored in the holding head 36 and is connected to a suction tube 41, and as shown in FIG. 6, opens outward at the lower end through a tip opening 42. As shown in FIG. A guide protrusion 43 is formed at the lower end of the holding head 36 and fits into the opening of the second insert 5. Note that a guide protrusion 9c is also provided at the upper end of the second insert mounting portion 9b of the jig pallet 8, and similarly fits into the opening of the second insert 5. The head plate 34 includes a guide member 4.
A guide pin 45 is installed in the lower end of the jig pallet 4, and is fitted into the guide hole 8b of the jig pallet 8. Further, a second insert chute 46 is provided at the horizontally moving end of the second insert supplying means 30, and the second inserts 5 are fed in alignment here.

On the other hand, in the insert removal station 17, as shown in FIG.
It can be opened to the extent that it can pass through.

As shown in FIG. 2, below the opening/closing rail 48, a jig pallet lifting means 50 is provided, and the lifting means 50 has a lift plate 51 located between the pair of conveyors 10. The lift plate 51
is connected to a slider 53 via an arm 52. The slider 53 is slidably fitted into a guide rod 54 and is connected to a lift cylinder 55 so that it can be moved up and down. Note that, as shown in FIG. 7, the lift plate 51 has a guide protrusion 51a.
is provided protrudingly and is fitted into and engaged with the recess 8b of the jig pallet 8.

Further, above the opening/closing rail 48, as shown in FIG. 2, a take-out arm 56 is provided, and a suction head 57 is attached to the tip of the take-out arm 56. As shown more clearly in FIG. 7, the suction head 57 is provided with a first holder 58 for adsorbing the first insert 4 and a second holder 59 for adsorbing the second insert. and each communicates with a vacuum source. A suction pad 60 made of an elastic material such as rubber is attached to the lower end of the first holding body 58. On the other hand, the second holder 59 has the same structure as the holding head 36 in the second insert supply means 30. In addition, 61 is a stopper.

Furthermore, a first insert stocker unit 63 is provided between the first insert supply station 15 and the second insert supply station 16.
is provided.

As shown in FIGS. 8 and 9, the base block 64 of the stocker unit 63 has a guide hole 6.
A guide rod 66 is provided upright on the upper surface, and the guide hole 65 and the guide rod 66 are filled with the first insert 4. The base block 64 has a first shutter 67 that can be freely retracted into the guide hole 65.
and a second shutter 68 are provided, which are opened and closed by opening and closing cylinders 69 and 70, respectively. The stocker unit 63 is arranged at such a position that the guide hole 65 is aligned with the jig pallet 8 on the rail 7.

On the other hand, at the left end of the frame 6, there are
As shown in the figure, a stopper pin 71 is provided on the top surface of the conveyor 10.

In the above configuration, when the jig pallet 8 is conveyed to the first insert supply station 15 on the left by the conveyor 10, the stopper pin 7
1 prevents further movement and stays in place. And lifting cylinder 2
1, the lifting plate 20 rises from between the conveyors 10, places the jig pallet 8 on the conveyor 10, and rises further. At this time, the protrusion 20a engages with the recess 8a of the pallet 8 and is positioned. The elevating plate 20 stops rising after the jig pallet 8 has risen to the same height as the rail 7 surface. In this state, the first insert 4 is positioned and placed on the first insert mounting portion 9a of the jig pallet 8 by the supply means 26. Note that, normally, the first insert 4 supplied at the station 15
As shown in FIG. 7, a molded product having already undergone primary molding in a previous step and having a gear forming portion 2 is supplied as a primary molded product.

Next, the transfer cylinder 25 is driven to move the elevating plate 20 to the right, that is, in the transfer direction, and the jig pallet 8 is placed on the rail 7. At this time, the jig pallet 8 pushes forward the jig pallet 8 that has been continuously arranged in advance by one piece. Thereafter, the elevating plate 20 is driven back by the lifting cylinder 21 and lowered, separated from the jig pallet 8, and then returned to its original position by the transfer cylinder 25. Note that during the above transfer operation, as shown in FIG. 4, the protrusion 20a of the elevating plate 20 engages with the recess 8a of the jig pallet 8, so the jig pallet 8 slides on the elevating plate 20. Never.

The jig pallet 8 on which the first inserts 4 are placed slides on the rails 7 and is moved to the second insert supply station 16. Here, the second
In the holding head 36 of the insert supply means 30,
The second insert 5 in the chute 46 is vacuum-adsorbed, and the holding head 36 is attached to the jig pallet 8.
After aligning it above, it is lowered and brought into contact with the second insert mounting portion 9b of the jig pallet 8, as shown in FIG. At this time,
Guide member 44 vertically installed on head plate 34
The guide pin 45 is connected to the guide hole 8a of the jig pallet 8.
By fitting into the holding head 36, overall guidance is ensured, and the second holding head 36 is
The insert 5 is guided by its opening fitting into the guide protrusion 9c on the placement part 9b,
It is accurately positioned on the mounting portion 9b. After that, communication between the suction hole 40 of the holding head 36 and the vacuum source is cut off, and the vertical movement cylinder 33 is used to
When the head plate 34 is pulled upward, the second insert 5 is separated from the holding head 36 and remains on the mounting portion 9b of the jig pallet 8.

In this way, the jig pallet 8 on which the first insert 4 and the second insert 5 are accurately positioned and mounted reaches the insert removal station 17 and is pushed onto the opening/closing rail 48. Here, as shown in FIG. 7, the lift plate 51 of the jig pallet elevating means 50 is raised by the lift cylinder 55 to lift the jig pallet 8 upward. At this time, the lift plate 51
The guide protrusion 51a fits into the recess 8b of the jig pallet 8. Eventually, when the jig pallet 8 comes into contact with the stopper 61 and stops rising, the suction head 57 of the take-out arm 56 is lowered, and the suction pad 60 of the first holder 58 is placed on the first jig pallet 8.
While abutting the insert 4, the second holding body 5
9 is brought into contact with the second insert 5. When the first holder 58 and the second holder 59 are connected to a vacuum source, the first insert 4 and the second insert 5 are held by suction on the first holder 58 and the second holder 59, respectively. . Thereafter, the suction head 57 is raised and the take-out arm 56 is rotated or retreated to align the suction head 57 with a mold (not shown), and the first and second inserts 4 and 5 are placed in the mold-carving space. Insert into.

Meanwhile, as shown in FIG. 7, the opening/closing rail 48 moves to the open position and lifts the lift plate 51 on which the empty jig pallet 8 from which the inserts 4 and 5 have been removed is lowered, and the jig pallet 8 descends between the rails 48 in the open position and is placed on the conveyor 10 below. At this time, the lift plate 51 is lowered slightly below the conveyor 10. The empty jig pallet 8 placed on the conveyor 10 is returned by the conveyor 10 to the first insert supply station 15 on the left in FIG.

On the other hand, the first insert 4 supplied at the first insert supply station 15 is
As mentioned above, normally the primary molded product is a finished product, but if any trouble occurs in the primary molding operation performed in the pre-process of the station 15, the first insert supply means 26 The first insert may not be supplied to the jig pallet 8. In such a case, the first insert stocker unit 63 disposed between the first insert supply station 15 and the second insert supply station 16 is activated.

That is, as shown in FIGS. 8 and 9, when it is detected by appropriate means that the first insert 4 is not placed on the jig pallet 8 being transferred on the rail 7. , the opening/closing cylinder 70 is driven, the second shutter 68 is opened, the first insert 4 filled in the guide hole 65 of the base block 64 falls, and the first insert placement part of the jig pallet 8 is placed. 9a. At this time, the first shutter 67 is closed and is holding down the second first insert object 4 from the bottom, so only the lowest first insert object 4 falls.
Items after the second one will not fall. Thereafter, when the second shutter 68 is closed and the first shutter 67 is opened, the first insert 4
All of the shutters are lowered, and the lowermost one is placed on the second shutter 68. Then, the user closes the first shutter 67, grasps the second first insert from the bottom, and waits for the next operation.

In the above embodiment, the case where there are two types of inserts is described, but there may be three or more types, and in this case, after the second insert supply station, the third, fourth, etc. A supply station may be provided.

As described above, according to the present invention, a plurality of jig pallets are placed on a rail and transferred one after another, insert supply stations are provided at a plurality of locations along the rail, and insert removal is performed at the final stage. By adopting a configuration in which a station is provided, it is possible to sequentially supply and place inserts at predetermined positions on the jig pallet, maintain the relative positional relationship between the inserts, and then take them out and transfer and insert them into the mold. Therefore, there is an excellent effect that the relative positions of the plurality of inserts inserted into the mold can be maintained appropriately.

In addition, a conveyor for returning the jig pallet is provided below the rail, so that the empty jig pallet after the inserts are taken out is returned to its initial position, and the above operation is carried out continuously and automatically. It also has the effect of allowing you to do it.

Furthermore, by providing the first insert stocker unit, even when the first insert that is supplied as a primary molded product is not supplied onto the jig pallet due to inconveniences such as primary molding work, it can be easily transported from the stocker unit. There is an advantage that the first insert is supplied auxiliary and does not cause any hindrance to subsequent operations.

Therefore, compared to the conventional manual insertion work, extremely accurate insertion work can be performed automatically, and work efficiency is dramatically improved.

[Brief explanation of drawings]

FIG. 1 shows an example of a molded product, FIG. 1A is a perspective view, FIG. The figure shows a top view of the first insert supply station, the fourth
The figure is a sectional view taken along line A-A in Figure 3, and Figure 5 is B in Figure 2.
-B sectional view, Figure 6 is an enlarged sectional view of C part in Figure 5,
7 is a cross-sectional view taken along line DD in FIG. 2, FIG. 8 is a cross-sectional view taken along line E-E in FIG. 2, and FIG. 9 is a top view shown in FIG. 1... Molded product, 4... First insert, 5...
...Second insert, 7...Rail, 8...Jig pallet, 9...Insert placement part, 10...
Jig pallet return conveyor, 15...first insert supply station, 16...second insert supply station, 17...insert takeout station, 20...lifting plate, 21...lifting cylinder, 25... ...transfer cylinder,
26...First insert supply means, 30...Second insert supply means, 34...Head plate, 36...Holding head, 48...Opening/closing rail,
50... Lifting means, 51... Lift plate, 56...
Take-out arm, 57... suction head, 63... first
Insert storage unit.

Claims (1)

[Claims] 1. In an insert supply device for a mold device in an injection molding machine that molds a molded product having a plurality of inserts, the plurality of inserts 4 and 5 are positioned in a predetermined relative positional relationship. A pair of rails 7 for transporting the plurality of jig pallets 8, and a conveyor 1 for returning the jig pallets provided below the rails 7.
0, and a first insert supply station 15, a second insert supply station 16, and an insert take-out station 17 are provided along the rail 7, and the first insert supply station 15 includes: A moving means 2 for raising the jig pallet 8 on the conveyor 10 to the position of the rail 7 and then horizontally moving it in the transfer direction.
0, 21, 25, and a first insert supply means 26 for supplying the first insert 4 onto the jig pallet 8 at the raised position, and the second insert supply station 16 has the rail 7. A second insert supply means 30 is provided for supplying the second insert 5 to a predetermined position on the upper jig pallet 8, and the insert removal station 17 includes an opening/closing rail 48 located on an extension of the rail 7. , a lifting means 50 for lifting and lowering the jig pallet 8 on the opening/closing rail 48, and a suction head 57 for suctioning and holding the inserts 4 and 5 on the jig pallet 8 while maintaining a predetermined relative positional relationship. An insert supply device for a mold device, characterized in that it is equipped with a take-out arm 56 having a take-out arm 56. 2. In an insert supply device for a mold device in an injection molding machine that molds a molded product having a plurality of inserts, a plurality of jig pallets for positioning the plurality of inserts 4 and 5 in a predetermined relative positional relationship. 8, a pair of rails 7 for transporting the plurality of jig pallets 8, and a jig pallet return conveyor 1 provided below the rails 7.
0, and a first insert supply station 15, a second insert supply station 16, and an insert take-out station 17 are provided along the rail 7, and the first insert supply station 15 includes: A moving means 2 for raising the jig pallet 8 on the conveyor 10 to the position of the rail 7 and then horizontally moving it in the transfer direction.
0, 21, 25, and a first insert supply means 26 for supplying the first insert 4 onto the jig pallet 8 at the raised position, and the second insert supply station 16 has the rail 7. A second insert supply means 30 is provided for supplying the second insert 5 to a predetermined position on the upper jig pallet 8, and the insert removal station 17 includes an opening/closing rail 48 located on an extension of the rail 7. , a lifting means 50 for lifting and lowering the jig pallet 8 on the opening/closing rail 48, and a suction head 57 for suctioning and holding the inserts 4 and 5 on the jig pallet 8 while maintaining a predetermined relative positional relationship. between the first and second insert feeding stations 15, 16;
When the first insert 4 is not supplied onto the jig pallet 8 at the first insert supply station 15, the first insert supply station 15 supplies the first insert 4 auxiliary.
An insert supply device for a mold device, characterized in that an insert stocker unit 63 is provided.