JPH06101878B2 - Method of manufacturing a dust cap for a speaker - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a speaker dust cap used in various audio equipment.

2. Description of the Related Art FIG. 3 shows the structure of a conventional general speaker. Here, 1 is a dust cap, and in addition to its original function of preventing dust, fashionability is emphasized. For this reason, resin films that have been subjected to aluminum vapor deposition occupy the mainstream, which is expensive in terms of cost.

FIG. 4 shows a conventional example of a method of manufacturing such a dust cap. That is, FIG. 4A shows a hoop-shaped sheet material 2 slit into a predetermined width, and the sheet material 2 is heated as shown in FIG. At these heating and pressure molding stages,
The material is in a continuous state, after that, as shown in (c), it is cut one by one, and as shown in (d), it is punched into a required diameter in a separate step to complete the dust cap 1 shown in (e). The product is obtained.

However, in the conventional manufacturing method as described above, the wrinkles 3 generated at the time of molding as shown in (b) are absorbed by forming the stepped shape of the molded product 4 as shown in the figure. However, there is a problem that the material is required to be twice as large as the required area and the yield is low. Further, since the punching step shown in (d) is performed by a manual press work, there is a problem that productivity is low and cost is high.

Therefore, an object of the present invention is to solve such problems and to reduce the material and man-hours to reduce the cost in the manufacturing process.

Means for Solving the Problems In order to solve the above problems, the present invention provides a resin film,
After cutting a sheet-shaped material such as paper or cloth, heating the cut material at a temperature for curing, and applying pressure to the required dust cap-shaped mold to press-mold the heated material. When punching to the required diameter, during the pressure molding,
A V-shaped groove, which also serves as a wrinkle stopper and a centering guide at the time of punching, is formed on the outer circumference of a required dust cap-shaped portion of the material.

By doing so, the V-shaped groove is formed at the time of pressure molding of the material, so that the yield of the material is significantly improved as compared with the conventional punching in a stepped shape, and at the time of punching. Centering is easily performed. This allows
A consistent continuous manufacturing method from molding to punching can be established, and a significant cost reduction of the dust cap can be achieved.

In order to carry out this method, the molding die has a double structure of a portion for molding the material into a predetermined dust cap shape and a portion for molding a V-shaped groove on the outer peripheral portion thereof. It is suitable. In addition, it is preferable that the timing of molding is such that the material is first sandwiched by the groove molding portion in the molding die and then pressure molding is performed in the shape of the dust cap.

Embodiment One embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show a method of manufacturing a dust cap according to the present invention, FIG. 1 is its three-dimensional view, and FIG. 2 is its sectional view.

In both figures, (a) shows the material 11, and as the material 11, a resin film obtained by subjecting a hoop-shaped sheet material to aluminum vapor deposition is used. Further, as the material 11, other than this, sheet-shaped paper, cloth, or the like can be used.

First, as shown in (b), the material 11 is cut into a required size to form a sheet material 12, and a chuck 13 is sandwiched between the sheet material 12 and the sheet material 12.
Heat and soften with radiant heat (200 ℃, 2sec). next,
As shown in (c), molds 14 and 15 heated to about 100 ℃
Then, it is pressure-molded into the required shape with a pressure of about 500 kg. At this time, the V-shaped groove 17 is simultaneously formed on the outer periphery of the required shape portion 16 by the molds 14 and 15. At this time, the presence of the groove 17 can prevent wrinkles from being generated in the required shape portion 16.

After that, as shown in both figures (d), the sheet material 12 is sandwiched between the upper and lower center guides 18 and 19, and the chuck 13 is inserted as shown by the arrow.
The dust cap 21 shown in (e) is obtained by punching out the required diameter with the punch 20 while slightly releasing.
At this time, the sheet material 12 uses the groove 17 to easily and easily perform centering on the center guides 18 and 19.

The molds 14 and 15 have not only the required shape portion 16 but also a V-shape having a wrinkle stopping function and a centering function at the time of punching.
It is also possible to form a V-shaped groove 17, and one product is uniform, but since it is incorporated in the die set, it is possible to shorten the time for switching the product type (1 hour to 10 minutes).

EFFECTS OF THE INVENTION As described above, according to the present invention, by forming the V-shaped groove during the manufacture of the speaker dust cap, it is possible to obtain the wrinkle-stopping effect that occurs during molding and the centering effect during punching. Since the punching can be performed continuously and the material yield can be improved, the production effect is great.

[Brief description of drawings]

FIG. 1 is a three-dimensional view of an embodiment of the present invention, FIG. 2 is a sectional view thereof, FIG. 3 is a sectional view of a conventional general speaker, and FIG. 4 is an explanatory view of a conventional example. 11 …… Material, 14,15 …… Mold, 16 …… Required shape part, 17…
…groove

Claims (1)

[Claims] 1. A sheet-shaped material such as a resin film, paper or cloth is cut, and the cut material is heated at a temperature to soften the material, and the mold is heated to a desired dust cap shape. When the material is pressure-molded and punched to a required diameter, a V-shaped groove which is used as a wrinkle stopper and a centering guide at the time of the pressure molding is formed in the required dust cap shape portion of the material. A method for manufacturing a dust cap for a speaker, characterized by forming the dust cap on the outer periphery.