JPS6029624B2 - Embedded fitting supply device for plastic molding molds - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an embedded fitting supply device for a plastic mold,
Specifically, the embeddings mounted with semiconductor chips, etc. are arranged in a predetermined manner, loaded into a plastic mold in this state, and, if necessary, after encapsulation molding, the molded product is placed in the metal together with the embeddings. The present invention relates to an embedded metal fitting supply device for plastic molding molds, which also has a function to take out the metal fittings from the mold.

Conventionally, when manufacturing semiconductor devices, embedding fittings with semiconductor chips mounted thereon are arranged on an embedding fitting loading tool, the loading jig is held by hand and loaded into a mold, and after molding, the molded product is is removed from the mold together with a loading jig.

However, since everything from arranging the embedded fittings to the loading jig, loading the loading jig into the mold, and removing it after molding is done manually, it is necessary to increase the number of products in the mold. This increases the shape and weight of the embedded metal fitting loading jig, resulting in increased worker fatigue and increased working time, which actually reduces efficiency.

Therefore, the size of the mold and the number of products are limited, making it extremely difficult to increase production efficiency. In addition, since the mold is usually heated to a high temperature of 10,000 to 2,000 degrees,
There was also the risk that workers could accidentally come into contact with the mold and suffer burns. The present invention solves the above-mentioned conventional drawbacks and problems, and provides an embedded metal fitting for plastic molds that mechanically performs the arrangement of the embedded metal fittings, the loading into the mold, and the removal from the mold after molding. The purpose is to provide a feeding device.

That is, the gist of the present invention is to provide a storage shelf lifting device that intermittently raises a storage shelf storing embedded metal fittings by a predetermined distance; an embedded fitting ejection device that transfers the embedded fittings to the embedded fitting positioning device; an embedded fitting positioning device that arranges the embedded fittings transferred from the storage shelf; and an embedded fitting positioning device that arranges the embedded fittings that are arranged on the embedded fitting positioning device. An embedded metal fitting supply device for a plastic molding mold is characterized by comprising an embedded metal fitting suction and conveyance device that sucks a metal fitting and loads it into a mold.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The apparatus of the present invention will be described below with reference to drawings showing an embodiment in which the apparatus is applied to a mold as a lead frame embedding fitting for a semiconductor device. The embedded metal fitting supply device according to the present invention shown in the figure is composed of a storage shelf lifting device 17, an embedded metal fitting ejecting device 13, an embedded metal fitting positioning device 6, and an embedded metal fitting suction and conveyance device 8. The storage shelf 11 is provided with grooves 20 each having the width of a lead frame at each stage, and is configured to have an arbitrary number of stages, and the lead frames 18 are accommodated in the grooves. The storage shelf lifting device 17 is provided with a space for accommodating the storage shelf 11, and the lifting of the storage shelf is stopped by an air cylinder or other conveying means 12 in conjunction with the embedded metal ejecting device 13.

The embedded metal fitting ejecting device 13 is composed of an air cylinder or other driving means 16 and an embedded metal fitting ejecting member 15, and performs a reciprocating movement of the storage shelf lifting device 17 and the sardines back and forth.

The embedded metal fitting protruding portion 15 is formed of a plate having one end connected to the driving means 16 and the other end formed in a fork shape, and both sides of the plate are guided by the embedded metal fitting protruding portion guide 14 to form a fork-shaped plate. The end portion of the storage shelf 11 can move forward and backward into the storage shelf 11. Note that the embedded metal fitting protruding member does not necessarily need to be formed of a plate, and may also be formed of a twill. Here, the movement of the storage shelf lifting device 17 and the embedded metal fitting ejecting device 13 will be explained with reference to the operational diagram of FIG. A limit switch or a stopper (both not shown) is provided so that the reciprocating movement of the embedded metal protruding portion 15 is not hindered, and the storage shelf 1
After 1 rises one step and stops, the embedded metal fitting protrudes and Miyakomura 1
5 starts moving forward toward the IJ card frame 18 in the storage shelf 11, and as it is, the lead frame 18 is pushed out to the embedded metal fitting positioning device 16, and the lead is placed at the position set by the limit switch or stopper (both not shown). It returns backwards, leaving frame 18 behind.

In this embodiment, since two rows of holder blocks 3 are arranged on both sides of the center block 28, the ejection process described above is repeated twice, and in the second process, positioning is performed by adding another setting position. Note that the set position has an important relationship with suction loading, and sufficient care must be taken when determining the set position. The embedded metal fitting positioning device 6 is provided with grooves 19 at the same intervals as the storage shelves 11, and positions the lead frame 18 in a direction perpendicular to the direction in which it enters.

Positioning in the advancing direction is performed by the amount of protrusion of the embedded metal fitting ejecting device 13. As shown in FIG. 4, the embedded fitting suction conveyance device 8 consists of a suction plate provided with a plurality of suction air holes 26 and a driving means 9. The suction plate is attached to the tip of the movable part 21 of the driving means 9. A heat-resistant elastic bush 23 is attached to the air hole 26 for reliable suction, and a lead frame set pin 25 is provided to prevent positional displacement during suction. be.

The embedded metal fitting suction and conveyance device 8 regularly reciprocates up and down over the embedded metal fitting positioning device 6 and the holder block 3 in the mold 1, and performs suction and loading of the lead frame and removal of the molded product. That is, the suction plate 8a attracts the embedded metal fittings arranged on the embedded metal fitting positioning device 6 with the elastic bushing 23, and embeds them toward the mold disposed in the molding machine 4 by the action of the driving means 9. Transport the fittings. The board frame 18 is transported onto the holder block 3 by the embedding metal suction transport device 8, and is loaded onto the cavity 7 in the holder block 3 by releasing the suction (see Fig. 3). Since the lead frame set pin 25 is short and has a small taper part, there is a risk of setting errors during mechanical loading, so the overall length of the lead frame set pin and the taper part are lengthened to make it easier and more reliable. It is designed to allow for easy loading.

After loading the embedded metal fittings into the mold, the suction plate 8a
It is moved back to its original position by the action of the drive means 9.

When the molding is completed, the suction plate moves into the mold by the action of the driving means 9, sucks the embedded metal fitting again, and takes out the molded product from the mold. Incidentally, the vertical movement of the suction plate is performed by a driving means in the base that moves the driving means 9 up and down.
In the embodiment described above, the embedded metal fitting suction and conveyance device 8 is used to load the embedded metal fittings into the mold and take them out of the mold. It is also possible to provide one unit for each unit and perform loading and unloading using separate units.

The structure and operation of each device in this specification are merely illustrative, and the actual structure and operation thereof can be variously selected according to requirements.

According to the present invention, it is possible to eliminate the need for an operator to arrange the embedding fittings in the embedding fitting loading jig, loading them into the mold, and taking them out.

In addition, in a mold for encapsulation molding of semiconductor devices, etc., when loading an embedding metal using a conventional embedding metal fitting loading jig, the loading jig is placed between the holder block 3 as shown in FIG. 3A. However, in the device according to the present invention, as shown in FIG. 3B, there is no intervening space between the holder blocks 3 that hold the cavities, and the spacing between the holder blocks 3 is reduced accordingly. Since the space can be narrowed, it is possible to increase the number of products produced in the same mold space. As a result, it is possible to increase the number of orders by 1.5 times.
Immediately after the pre-molding processing process is completed, embedded metal fittings, etc. are stored in a storage shelf, transported as they are to the molding process, and stored in the embedded metal fitting supply device of the present invention, where they are automatically arranged, loaded, and then molded. This reduces contact with the outside world and prevents quality deterioration due to damage.

Furthermore, in terms of safety, the feeding device reduces the time the worker spends in contact with the molding machine, and the reduction in manual labor reduces fatigue, which is effective in improving safety.

Due to the various effects mentioned above, the working time of workers is shortened,
Utilizing the extra time, a single worker can operate several molding machines equipped with the apparatus of the present invention by adjusting the molding cycle, resulting in labor savings.

As described above, the present invention provides effects that are not available in conventional methods, such as labor saving, increased product yield, improved quality, and improved safety in the molding work of molded products having embedded metal fittings and the like.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embedded fitting supply device according to the present invention arranged adjacent to a molding machine, FIG. 2 is a schematic side view showing the device of FIG. 1 in a partially operating state, and FIG. FIG. 3A is a schematic sectional view showing the state when loading the embedded metal fittings, and FIG. 3A shows the case where the secondary fitting fitting loading jig is used, and FIG. FIG. 4 shows the outline of the embedded metal suction conveyance device, and FIG. 4A shows its bottom view.
B is a partial sectional view taken along line AA' in FIG. 4A. 2... Guide pin, 4... Molding machine, 5
... Tie bar, 10 ... Adsorption device conveyance means base, 14 ... Embedded metal fitting protruding member guide, 27 ... Air hose. Figure 3: Plan/Figure 2: Figure 3

Claims (1)

[Claims] 1. A storage shelf lifting device 17 that intermittently raises a storage shelf 11 storing embedded metal fittings by a predetermined distance, and a storage shelf lifting device 17 that intermittently raises the storage shelf 11 storing embedded metal fittings, and a built-in metal fitting positioning device for the embedded metal fittings in the storage shelf that is arranged so as to be movable in the storage shelf. An embedded fitting ejection device 13 for transferring the embedded fittings to the device 6, an embedded fitting positioning device 6 for arranging the embedded fittings transferred from the storage shelf, and an embedded fittings positioning device 6 for arranging the embedded fittings arranged on the embedded fitting positioning device. An embedded fitting supply device for a plastic mold, characterized by comprising an embedded fitting suction and conveyance device 8 which sucks and loads the embedded fitting into the mold.