JPH0254763B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Technical Field> The present invention relates to a molding apparatus for molding a front panel made of synthetic resin and the like that is mounted on the indoor side of an air conditioner.

<Prior art> Generally, a molded product A such as a front panel made of synthetic resin is attached to the indoor side of an air conditioner as shown in FIGS. 1 and 2.
consists of a front plate 1, left and right side plates 2, 3, and a top plate 4, a suction side louver 5 is formed on the front plate 1, an air discharge port 6 is formed on the left side of the suction side louver 5, and an air discharge port 6 is formed on the mouth wall of the discharge port 6. A main body 8 is formed by extending a pair of left and right louver support pieces 7 toward the back side, and a plurality of holes 9 facing each support piece 7 are formed in the vertical direction. A discharge port louver 10 is provided on the right side of the front plate 1 to discharge dehumidified clean air into the room.
This discharge port louver 10 is formed separately from the molded product A in order to change the discharge direction.
The left and right outer end shafts of the molded product A are fitted into the holes 9 of the molded product A. As shown in FIGS. 3 and 4, this molded product A is integrally molded by injecting and cooling a molten material between an upper mold 11 and a lower mold 12 that can be opened and closed with each other.
In the case where the hole 9 is provided in a direction perpendicular to the opening/closing direction of the lower mold 1 and the lower mold 12, hole forming pins 16 and 19 are required.

Conventionally, such holes have been formed using a cylinder method in which a hole forming pin 16 is freely retractable from the upper mold 11 using a hydraulic cylinder 14 via an interlocking mechanism 15 as shown in FIG. 3, or a cylinder method as shown in FIG. The hole forming pin 19 is made to be able to move in and out of the upper mold 11 using finger pins 17 (angular pins) and side cores 18, as shown in FIG. However, with this method, it is difficult to form holes 9 that are perpendicular to the opening and closing directions of the upper and lower molds and face each other in a narrow space, as shown in FIG.

<Objective> In view of the above, an object of the present invention is to provide a molding device that can form a hole facing a narrow space in a direction perpendicular to the opening/closing direction of the upper mold and the lower mold with a simple structure.

<Example> Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2 and FIGS. 5 and 6. In a molding apparatus for obtaining a synthetic resin molded product A having a main body 8 molded with a mold and a hole 9 molded in a direction perpendicular to the opening/closing direction of an upper mold 11 and a lower mold 12, the upper mold 11 or A hole-forming pin 20 that can freely protrude and retract from the mold surface of the lower mold 12 is provided, and the hole-forming pin 20
The protruding state C at room temperature and the recessed state D at high temperature molding
A shape memory element 21 is provided for switching between the two.

The metal upper mold 11 covers the outer surface A1 of the molded product A.
The metal lower die 12 is formed with unevenness having the same shape as the mouth wall surface of the discharge port 6, and the metal lower mold 12 has unevenness having the same shape as the inner surface A2 on the back side of the molded product A. And the discharge port forming protrusion 1 of the upper mold 11
A sliding passage 22 is formed in 1a, into which the pair of left and right convex hole-forming pins 20 are inserted so as to be retractable. This passage 22 is connected to a pair of left and right hole forming pins 20.
, a central large path 22a containing the shape memory element 21 interposed between the large diameter portions 20a, and a small diameter portion 20b at the tip of the hole forming pin 20 at both ends of the large path 22a. and a small path 22b that slides and guides. and the shape memory element 2
1 is connected in series with a power source 23 and a changeover switch 24 outside the upper mold 11 to form an electric circuit 25. This shape memory element 21 is made of a shape memory alloy consisting of a Ni-Ti alloy or a Cu-Zn-Al alloy, and exhibits a shortened shape on the high temperature side above the transformation temperature and an elongated shape on the low temperature side below the transformation temperature. The shape is memorized as shown.

In the above configuration, as shown in FIG. 5, the upper mold 11 and the lower mold 12 are closed, and the changeover switch 24 is
If it is turned off, the shape memory element 21 assumes an elongated shape, and the hole forming pin 20 is pushed outward to the left and right within the sliding passage 22, and becomes in the state C in which it projects from the upper mold 11 into the molding cavity. In this state, put the synthetic resin material into the upper mold 1.
1 and the lower mold 12 and cooled, the molten synthetic resin material begins to solidify, forming the molded article A, and holes 9 are formed by the hole forming pins 20. At this time, when the changeover switch 24 is turned on at an appropriate time, the shape memory element 21 is heated and begins to shorten as shown in FIG. 6, so the hole forming pin 20 slides inward within the sliding passage 22 and forms It is immersed from the sky and enters the immersion state D with respect to the upper mold 11. Therefore, by opening the upper mold 11 and the lower mold 12, the upper mold 11 and the lower mold 12 can be pulled out without being restricted by the molded product A. After molding the molded product A, turn the changeover switch 24.
OFF, the hole forming pin 20 is switched to the protruding state C, and a new molded product A is formed.

In the present invention, it goes without saying that the expansion and contraction of the shape memory element 21 can be performed not only by electrical heat generation as in the above embodiment, but also by utilizing the ambient temperature around the shape memory element 21.

<Effects> As is clear from the above explanation, according to the present invention, the movement of the hole forming pins into and out is performed using a shape memory element, so it can be easily moved in the opening/closing direction of the upper mold and the lower mold with a simple structure. There is an excellent effect that holes can be formed in orthogonal directions.

[Brief explanation of drawings]

Figure 1 is an overall perspective view of the air conditioner, Figure 2 is a rear perspective view of the indoor front panel, and Figure 3 is a perspective view of the air conditioner.
The figure is a sectional view showing a conventional hydraulic cylinder type hole forming pin structure, FIG. 4 is a sectional view showing a hole forming pin structure using a conventional finger pin, and FIG. 5 is a hole forming pin structure showing an embodiment of the present invention. FIG. 6 is a sectional view showing the pin protruding state, and FIG. 6 is a sectional view showing the hole forming pin recessed state. A: molded product, C: protruding state, D: immersed state,
8: Main body, 9: Hole, 11: Upper mold, 12: Lower mold, 2
0: hole forming pin, 21: shape memory element, 22: sliding passage.

Claims (1)

[Claims] 1 A synthetic resin molded product having a main body molded in the space between an upper mold and a lower mold that are closed together, and a hole molded in a direction perpendicular to the opening and closing direction of the upper mold and lower mold. In the molding apparatus for producing a mold, a sliding passage perpendicular to the opening/closing direction of the upper mold and the lower mold is formed in at least one of the upper mold and the lower mold, and the hole is formed in the sliding passage. hole-forming pin,
moving the hole forming pin to a protruding state during forming;
1. A synthetic resin molding device, characterized in that it is provided with a shape memory element for moving to a retracted state upon completion of molding.