JP2542442Y2 - Mold mold equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a mold apparatus suitable for resin sealing of a semiconductor element mounted on a lead frame.

[0002]

2. Description of the Related Art For example, as a mold device for molding a semiconductor element by resin sealing, as shown in a lower mold 50 in FIG. 4, a large number of cavities in which a semiconductor element mounted on a lead frame is arranged. 51 to 54 are formed, and the molten resin is injected from the central cull portion 55 through the runners 57 to 60. On the four sides of the lower mold 50, there are provided concave guide plates 65 to 68 in which engagement grooves 61 to 64 having a predetermined width are formed in the center. Protrusion guide plates provided with protrusions that are closely fitted are provided, and when the upper die and the lower die 50 are brought into contact with each other, first, the protrusion guide plates and the concave guide plates 65 to 68 are connected to each other. The upper die and the lower die 50 were positioned by engaging with each other.

[0003]

However, there is a problem that the maintenance of the mold is extremely difficult when the convex guide plate is provided on the surface of the mold. Furthermore, the projections on the convex guide plate are worn out by use, and if worn, the positioning cannot be accurately performed. Therefore, it is necessary to appropriately replace the convex guide plate. In this case, the entire convex guide plate needs to be replaced. There was a problem that it needed to be replaced. The present invention has been made in view of such circumstances, and mold maintenance is easy.
Moreover, it is an object of the present invention to provide a mold device capable of using a convex guide plate for a long time.

[0004]

According to the present invention, there is provided a semiconductor device comprising:
The described mold die apparatus is a mold die apparatus comprising an upper die and a lower die provided with a guide member formed with a convex part and a concave part which are respectively engaged in four directions. The guide member comprises a concave guide member, and the upper die guide member is provided with a concave mounting bracket fixed to the upper die, and protruding from the concave mounting bracket and closely contacted with screws. Is formed by a bridge member having a substantially square cross section with a counterbore. Here, the substantially square includes not only a perfect square, but also a square whose corner is missing or rounded.

[0005]

According to a first aspect of the present invention, there is provided a mold die apparatus, wherein the lower die guide member comprises a concave guide member, the upper die guide member comprises a concave mounting member fixed to the upper die. Since it is composed of a piece member which is projected and protruded from the concave-shaped mounting member and is tightly screwed thereto, maintenance of the mold can be easily performed by removing the piece member from the concave-shaped mounting member. The piece member has a counterbore formed at its upper and lower ends and has a substantially square cross section, so if one of the piece members is worn, rotate it by 90 degrees before use. It can also be used upside down.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings to facilitate understanding of the present invention. Here, FIG. 1 is a partial side view of an upper and lower positioning mechanism of a mold apparatus according to an embodiment of the present invention, FIG. 2 is a plan view of a lower mold of the mold apparatus, and FIG. It is a perspective view of the piece member used for an apparatus.

As shown in FIGS. 1 and 2, a mold apparatus according to an embodiment of the present invention includes an upper mold 10 and a lower mold 11.
A concave mounting bracket 12 attached to four sides of the upper mold 10; a piece member 13 fixed to the concave mounting bracket 12; The guide member 14 is provided. Hereinafter, these will be described in detail.

As shown in FIG. 2, the lower die 11 is provided with a concave guide member 14 made of a steel plate into which the piece member 13 is fitted on four sides. The position of 14 is determined by positioning pins 15 and 16 on the center side, and is fixed to lower mold 11 by screws 17 and 18 on both sides. A parallel groove 19 having a predetermined width is formed at the center.

The concave fitting 12 is made of a steel plate having sufficient strength, and is located at a predetermined position of the upper die 10 by screws and positioning pins (not shown) provided on both sides similarly to the concave guide member 14. Exactly fixed.
A parallel groove 19a is provided at the center of the concave mounting bracket 12, and the piece 13 is closely fitted in the parallel groove 19a, and as shown in FIG. Screw holes 22 are formed on the upper and lower sides with counterbore portions 20 and 21, and the parallel grooves 19a are formed by bolts 23 with holes.
It is screwed to. The cross section has a square shape with rounded corners, and when one of the ridges is worn, it can be used by being rotated 90 degrees or turned upside down.

In FIG. 2, reference numeral 24 denotes a cull part;
Numerals 5 to 28 denote cavity groups, 29 to 32 denote runners, and in FIG. 1, 33 denotes an upper chase block and 34 denotes a lower chase block. Therefore, when using the mold apparatus, when the upper mold 10 is lowered, 4
Is inserted into the parallel groove 19 of the concave guide member 14 provided in the lower mold 11, whereby the upper mold 10 and the lower mold 11 are accurately positioned,
Cavities 25-formed in upper mold 10 and lower mold 11
28, and the resin sealing is performed on the cavity groups 25 to 28 from the cull portion 24 via the runners 29 to 32.

[0011]

As is apparent from the above description, the mold guide device according to the present invention is such that the lower guide member is a concave guide member, and the upper guide member is the upper die member. Since it is composed of a concave-shaped mounting bracket fixed to and a close-screws screw that protrudes from the concave-shaped mounting bracket and has counterbores formed at the upper and lower ends thereof, The bridge member can be easily removed. Thereby, maintenance such as repair or replacement of the mold becomes extremely easy. Further, even if the piece member is partially worn, the upper die and the lower die can be positioned by changing the mounting position or the direction thereof, so that the life of the upper die guide member can be extended. .

[Brief description of the drawings]

FIG. 1 is a partial side view of a vertical positioning mechanism of a mold apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view of a lower mold of the mold apparatus.

FIG. 3 is a perspective view of a bridge member used in the mold apparatus.

FIG. 4 is a plan view of a lower mold included in a mold apparatus according to a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 upper die 11 lower die 12 concave mounting bracket 13 piece member 14 concave guide member 15 positioning pin 16 positioning pin 17 screw 18 screw 19 parallel groove 19a parallel groove 20 counterbore 21 counterbore 22 screw hole 23 bolt with hole 24 Cull part 25 Cavity group 26 Cavity group 27 Cavity group 28 Cavity group 29 Runner 30 Runner 31 Runner 32 Runner 33 Upper die chase block 34 Lower die chase block

Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location // B29K 105: 20 B29L 31:34

Claims (1)

(57) [Scope of request for utility model registration] 1. A mold die apparatus comprising an upper die and a lower die provided with a guide member on each of which a convex portion and a concave portion to be engaged are formed, wherein the guide member of the lower die is The upper die guide member includes a concave mounting bracket fixed to the upper die, and protrudingly attached to the concave mounting bracket and screwed in close contact with the upper and lower ends thereof. A mold die apparatus comprising a bridge member having a substantially square cross section with a bore formed therein.