JP2581451Y2 - Mold device for insert molding - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention has an insert work insertion portion in a mold, inserts the insert work into the insert work insertion portion, and inserts the insert work by injection molding. The present invention relates to a so-called insert molding die apparatus for integrally molding an insert work.

[0002]

2. Description of the Related Art The prior art is shown in FIGS. 18 to 21 and will be described below. In the mold 101, an insert 102 and an ejector pin 10 that move in conjunction with the opening and closing operation of the mold 101.
3 are arranged. A cavity 104 and a work insertion hole 106 into which an insert work 105 is inserted are formed in the mold 101.

The insert work 105 has an H-shape as shown in FIG. 22. Needless to say, the work insertion hole is adapted to the H-type insert work 105. 106 are formed. The clearance (clearance) between the insert work 105 and the work insertion hole 106 is specifically 0.01 to 0.05 mm so that the resin does not enter when molded. High accuracy.

Next, the operation will be described. First, mold 1
01 is expanded and the insert 102 is also expanded. In the expanded state, the insert work 105 is inserted (press-fitted) into the work insertion hole 106 (see FIG. 18). Next, the mold 101 is closed, and at the same time, the insert 102 is also closed (see FIG. 19).
The mold 101 is expanded again, and the molded product in which the insert work 105 is integrally molded by the ejector pins 103 is exposed from inside the mold (see FIGS. 20 and 21).

[0005]

In the above prior art, the insert work 105 and the work insertion hole 1 are not provided.
06, it was difficult to insert the insert work into the work insertion hole 106. For this reason, the insert work must be manually inserted, resulting in poor productivity.

Therefore, work insertion by a robot or the like has been considered, but as described above, since the clearance is very small, a high-precision robot must be used.
Therefore, there was a problem that it became expensive.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to divide a cavity having an insert work insertion hole of a fixed width and insert an insert work on one side. An insert having an exposed groove is formed, a portion near the upper end of the insertion groove is made the same as the width of the insert work, and an intermediate portion is a loose fitting groove larger than the width of the insert work. Insert the tip of the hook into the loose fitting groove from
The insert work is sequentially fitted in the insertion groove.

[0008]

1 to 9 show a first embodiment of the present invention, which will be described below. In the mold 1, an insert 2 having a driving means (air cylinder) 3 independently of the opening and closing operation of the mold 1 and an ejector pin 4 for ejecting a molded product are arranged. In the mold 1, a cavity 5 formed by the insert 2 is formed.
Also, an insert as shown in FIG.
A work insertion groove 6 into which the work 105 is inserted is formed. The work insertion groove 6 is gradually expanded downward.

The insert work 105 is shown in FIG.
As shown in FIG. 5, the work insertion groove 6 is formed in accordance with the H-shaped insert work 105, but the work insertion groove 105 and the work insertion groove are formed. Groove 6
The clearance (clearance) between the upper end portion 7 and the upper end portion 7 is specifically 0.01 to 0.
The loose fitting portion 8 is formed to be larger than the width of the insert work 105.

Next, the operation will be described. First, mold 1
The nest 2 is expanded by the air cylinder 3 in accordance with the expansion of. The lower end 105 of the insert work 105 is inserted into the loose fitting portion 8 of the work insertion groove 6 formed in the expanded insert 2.
a is inserted by a work insertion device 10 as shown in FIG. 11 (see FIG. 1). Next, the air cylinder 3 is operated to close the insert 2. In the process of closing the insert 2, the insert work 105 is guided along the loose fitting portion 8 and is securely inserted into the work insertion groove 6 (see FIGS. 2 and 3).

Next, the mold 1 is closed and molding is performed (see FIG. 4). After the molding is completed, the mold 1 and the insert 2 are expanded (see FIG. 5), and the molded product 9 is protruded from the mold 1 by the ejector pins 4 (see FIG. 6).

Next, the work insertion device 10 will be described in detail. A work shaft 11 that can rotate and move up and down is attached to an arm tip (not shown) of a robot or the like. At the lower end of the work shaft 11, a parallel chuck 13 rotated by a rotary drive source 12, and an air cylinder for opening and closing the parallel chuck 13 and a drive source 14 such as an electromagnetic type are attached.

FIGS. 12 and 13 show another embodiment of the present invention. The above embodiment is an embodiment in which the insert 2 is moved in the direction perpendicular to the direction in which the mold 1 expands, while the insert 2 is moved in the same direction as the direction in which the mold 1 expands. In this case,
The nesting operation may use an ejector of a molding machine.

Next, the operation will be described. First, at the same time as the mold 1 is expanded, the insert 2 is raised (in FIG. 10). In the ascending process, the lower end portion 105a of the insert work 105 is inserted into the loose fitting portion 8 by the work insertion device 10 from an oblique direction. Next, the insert 2 is lowered and the mold 1
Close and perform molding.

FIGS. 15 to 17 show a third embodiment of the present invention. The work insertion groove 6 of the nest 2 is formed deep (see FIG. 15), and the work 105 is completely inserted into the work insertion groove 6 by the work insertion device 10 with the nest 2 raised. After the insertion (see FIG. 16), the insert 2 may be lowered and molded (see FIG. 17).

[0016]

According to the present invention, a cavity having an insert work insertion hole of a fixed width is divided to form an insert having an insert work insertion groove exposed on one side, and the insertion groove is formed. The vicinity of the upper end is the same as the width of the insert work, the middle portion is a loose fit groove larger than the width of the insert work, and the tip of the insert work is inserted into the loose fit groove obliquely. At the same time, since the insert work is sequentially fitted in the insertion groove, the insert work can be accurately and reliably inserted into the work insertion portion, and the insert molding die with high productivity can be obtained. An apparatus can be provided. In particular, when there is a plurality of insertion portions and the pitch of the work between the insertion portions is rough, the pitch of the work is corrected and is very good.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention;
It is a front sectional view at the time of walk insertion.

FIG. 2 is a front sectional view when the nest of FIG. 1 is started to be closed.

FIG. 3 is a front sectional view when the nest of FIG. 2 is closed.

FIG. 4 is a front sectional view at the time of injection molding of FIG. 3;

FIG. 5 is a front sectional view of the telescopic expansion of FIG. 4;

FIG. 6 is a front sectional view at the time of taking out the molded product of FIG. 5;

FIG. 7 is a perspective view of the insert and insert work of FIG. 1;

8 is an external perspective view of the molded product of FIG.

FIG. 9 is an external perspective view of FIG. 8 from another angle.

FIG. 10 is a front view of an insertwork insertion device.

FIG. 11 is a front view in operation of FIG. 10;

FIG. 12 is a left side view of FIG. 11;

FIG. 13 is a front sectional view of the second embodiment of the present invention when the insert is opened and an insert work is inserted.

FIG. 14 is a front sectional view when the nest of FIG. 13 is closed.

FIG. 15 is a front sectional view of the third embodiment of the present invention when the insert is opened and an insert work is inserted.

FIG. 16 is a front sectional view when the insert work shown in FIG. 15 is inserted.

FIG. 17 is a front sectional view when the nest of FIG. 16 is closed.

FIG. 18 is a front sectional view of the conventional apparatus at the time of an open mold.

19 is a front cross-sectional view of FIG. 18 when the mold is closed.

20 is a front sectional view at the time of injection molding of FIG. 19;

21 is a front sectional view at the time of taking out the molded product of FIG. 20;

FIG. 22 is an external perspective view of an insert work.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Die 2 Insert 3 Air cylinder 4 Ejector pin 5 Cavity 105 Insert work 6 Work insertion groove 7 Near the upper end of work insertion groove 8 Work insertion groove upper end loose fitting portion 10 Work insertion apparatus

Claims (1)

(57) [Scope of request for utility model registration] 1. A cavity having an insertwork insertion hole having a fixed width is divided to form an insert having an insertwork insertion groove exposed on one side surface, and a portion near an upper end of the insertion groove is formed. The width of the insert work is the same, the middle portion is a loose fitting groove larger than the width of the insert work, and the tip of the insert work is inserted obliquely into the loose fitting groove. A mold device for insert molding, wherein a work is sequentially fitted into an insertion groove.