JPH0353912A - How to remove a molded product with a shaft - Google Patents

Abstract

PURPOSE:To conduct stably the removing of a molded article, and prevent the falling of the molded article during the removing period by keeping the projection done by an ejecting pin until a shaft comes out thoroughly from a shaft insertion hole after the shaft is suction-held on a suction part. CONSTITUTION:At the time when a valve disc 1 is thrust at a predetermined distance by an ejector pin 9, a disc 2 and a suction part 10a come into close contact with each other, whereby the valve disc 1 is suction-held on a suction part 10a. At this point, a shaft 4 has not yet come out thoroughly from a shaft insertion hole 8. And, in this state, the projection by the ejector pin is kept further, following this, a suction rod 10 withdraws. Finally, the shaft 4 is thrust until it comes out entirely from the shaft insertion hole 8. After that, the ejector pin 9 withdraws; however, the thrust valve disc 1 is kept as sucked in the suction part 10a, thereby completing the removing from a lower mold 6.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an improvement in a method for removing a shaft-equipped molded product from a lower mold after molding.

BACKGROUND OF THE INVENTION FIG. 2 shows, as an example of a molded product with a shaft, a valve body l of a rotary type flow control valve used for controlling the idle speed of an internal combustion engine. In this F-body 1, a disk 2 and a cylindrical wall 3 erected on a part of its periphery are molded of synthetic resin, and a metal shaft 4 is inserted in the center of the disk 2. The configuration is as follows.

Figure 3 (Yo, -1 2nd record F body l's relative formwork F1'' theory 1!
In the IJ diagram, a molding die consisting of an upper mold 5 and a lower mold 6 is formed with a cavity 7 corresponding to the resin part, that is, the disk part 2 and the III cylinder wall part 3, and a cavity 7 is formed on the lower mold 6 side. A shaft insertion hole 8 is recessed, and injection molding of the resin part is performed with the metal soyaft 4 set in the shaft insertion hole 8.

The molded valve body 1 remains on the lower mold 6 side after the mold is opened, as shown in FIG.
At the same time, opposite to the ejecting direction, the suction [J-tube 10] of the molded product take-out machine is extended, air is sucked from the suction part 10a at the tip to suction the valve body 1, and the lower mold 6 is ejected.
I'm trying to take it out. In detail, when the ejector pin 9 starts to protrude, suction of air from the suction part 10a starts, and when the ejector pin 9 protrudes a predetermined amount qX, the valve body 1 is attracted to the suction part 10a.At this point, the ejector pin 9 The ejection by 9 is finished, but Nyaft 4
is not completely extracted from the shaft insertion hole 8. Next, the suction rod 10 that has absorbed the valve body 1 retreats upward together with the valve body 1, so that the shaft 4 is completely pulled out, and the removal of the valve body 1 is completed.

Problems to be Solved by the Invention However, in the conventional extraction method described above, it may be difficult for the shaft 4 to come out depending on the state of engagement between the shaft 4 and the shaft insertion hole 8. There was a drawback that the molded product could not be taken out in a sufficiently stable manner, such as the valve body 1 falling off from the valve 10a.

Tips for solving problems 4'. Therefore, in this invention, a molded product with a shaft, in which a shaft placed in a shaft-shaped hole is inserted into a resin part, is ejected from a lower mold with an ejector pin, and the shaft is placed in a direction opposite to the ejecting direction. In a method for taking out a molded product with a shaft, in which air is sucked from one part of the suction 4''' arranged in the air to adsorb the molded product, after the air is sucked into the first part of the suction 71, , it is characterized in that the shaft is projected by an ejector bin until it completely comes out of the shaft insertion hole.

When the molded product has been pushed out by a predetermined amount, the molded product is sucked into the suction portion. At this point, either the shaft 1 and the shaft have not completely come out of the shaft insertion hole, or the shaft is further ejected by the Enoektabin, and the shaft 1 and the shaft are forcibly ejected until they are all removed from the shaft insertion hole.

Example Hereinafter, one embodiment of this invention will be explained.

FIG. 1 shows the present invention in -1. This is an explanatory diagram of the culm applied to the removal of the valve body l described above, without showing an example of the disaster.
As shown in a), after the mold is opened, ejection by the gorge J tap pin 9 is started, and approximately at the same time, air suction from the suction portion 10a is started. Next, when the valve body I is pushed out by a predetermined amount by the ejector bin 9, the disc part 2 and the suction part 10a come close to each other as shown in FIG.
It is retained by adsorption. Further, at this point, the shaft 4 has not completely come out of the shaft insertion hole 8.

In this state, the ejector pin 9 continues to eject the ejector pin 9, and the suction rod 1O retreats accordingly. Eventually, the shaft 4 is pushed out until it completely comes out of the shaft insertion hole 8, as shown in (c).

Thereafter, the ejector pin 9 (moves backward), but the protruded valve body 1 is retained while being attracted to the suction part 10a as shown in (d), thereby completing removal from the lower mold 6.

Therefore, even if the shaft 4 fits relatively tightly into the shaft insertion hole 8 and is difficult to come out, it can be forcibly ejected by the ejector pin 9, so that it can be reliably removed.

Effects of the Invention As is clear from the above explanation, according to the method for taking out a molded product with a shaft according to the present invention, after the shaft is suctioned and held by the suction part, the enoectabin is used until the shaft comes out of the shaft insertion hole. Since the ejecting is continued, the elegance can be taken out stably, and the elegance does not fall off during removal.

[Brief explanation of drawings]

Fig. 1 is a process explanatory diagram showing one embodiment of the extraction method according to the present invention, Fig. 2 is a sectional view of a shaped valve body, Fig. 3 is an explanatory diagram of the molding process, and Fig. 4 is a conventional method. It is an explanatory view of a method of taking out a valve body in. l... Valve body, 4... Yaft, 6... Lower ηJ, 8 Shaft insertion hole, 9... Ejector pin, 10a... Adsorption part. 1 - Eleven valve Ikushi ( 4-Eleven shaft 6 --- T type 8 --- Shaft Saishin, entering JL 9-- One gill' Ektapiu 10- One bite 1 bundle = 121 sounds "; Figure 2 Figure 3 Figure 7 Jade Men's Face Toku 3 53912 (4) Figure 4 Young Master,

Claims (1)

[Claims] (1) A molded product with a shaft, in which the shaft placed in the shaft insertion hole of the lower mold is inserted into the resin part, is ejected from the lower mold with an ejector pin, and from the suction part placed opposite to the ejecting direction. In a method for removing a molded product with a shaft, in which the molded product is sucked by sucking air, after the shaft is attracted to the suction part, the shaft is ejected by an ejector pin until the shaft is completely removed from the shaft insertion hole. A method for removing a molded product with a shaft.