JPS637138B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a film molding die.

Structure of conventional example and its problems As shown in FIG. 1, a conventional film molding die for a single product such as a diaphragm core of a speaker has a lower mold 2 attached to the upper surface of a lower mold pedestal 1. and an upper mold 4 attached to the lower surface of the upper mold pedestal 3
and two guide pins 5, 5 protruding from the lower mold pedestal 1 for positioning the upper and lower molds, and two guide pins 5, 5 formed on the upper mold pedestal 3 to fit these guide pins 5, 5. It has two holes 6, 6 and a cylinder 7 mounted on the upper mold base 3 to press the upper mold against the lower mold. In the case of film molding, a film material is placed between the upper mold 4 and the lower mold 2, and the upper mold positioned by the guide pins 5, 5 is brought into close contact with the lower mold as much as possible. By the way, in such conventional molds, the lower mold 2 and the upper mold 4 are each made by processing a single piece of metal, and it takes a huge amount of money and time to manufacture them, and each time there is a change in molding, a new mold is required. The disadvantage was that a separate mold had to be manufactured.

Purpose of the Invention The present invention has been made to solve the above-mentioned conventional drawbacks, and it is possible to easily form a film molding mold for a single molded product by inserting a plate into the inner and outer plate retaining rings. The purpose is to make it possible to change the mold.

Structure of the Invention In order to achieve the above object, the present invention provides an inner plate retaining ring and an outer plate retaining ring which are arranged concentrically and facing each other on each of the upper and lower pedestals, and each concentric inner plate retaining ring Opposed radial slits are provided on the outer periphery of the ring and the inner periphery of the outer plate retaining ring, respectively, and the retaining ring is removably installed between the concentric slits of the inner plate retaining ring and the outer plate retaining ring. A plate is provided, and each plate attached to the upper pedestal side and each plate attached to the lower pedestal side are arranged so as to be positioned between the plates in a facing relationship, and the inner and outer plate retaining rings on the upper pedestal side and The plate attached to it forms the upper mold, and the inner and outer plate retaining ring on the lower pedestal side and the plate attached to it form the lower mold, and the upper plate and lower plate engage each other to form a single item. It is configured to perform film forming of products.

DESCRIPTION OF EMBODIMENTS Below, drawings (second to
This will be explained based on FIG. 7). 2 and 3 show the lower mold side, 11 is the lower mold pedestal, 12 is a circular outer plate retaining ring attached to this pedestal 11, and 13 is a circular outer plate retaining ring attached concentrically within this plate retaining ring 12. The outer plate retaining ring 12 has slits 14 radially spaced at appropriate angles on the inner circumference, and the inner plate retaining ring 13 has slits 14 radially spaced at appropriate angles on the inner circumference. The slits 14 are arranged radially on the outer circumference at appropriate angles.
It has a slit 15 opposite to.... 16
are the two plate retaining rings 12 on the pedestal 11,
13, with both ends facing the slit 1
4 and 15, and its upper end is located above each plate retaining ring 12 and 13. Note that both plate retaining rings 12 and 13 are provided with positioning pins 17a and 17 that protrude from above the pedestal 11, respectively.
Holes 12a, 12 that fit with a, 17b, 17b
a, 13a, 13a, and is positioned on the pedestal 11, and then fixed onto the pedestal 11 with screws not shown. 12b and 13b are screw insertion holes formed in the outer plate retaining ring 12 and inner plate retaining ring 13, and 18a and 18b are screw insertion holes formed in the base 11. Further, in the figure, reference numerals 19 and 19 are stoppers provided at two opposing corners of the pedestal 11, which determine the height of the upper mold side (described later), and 20 and 20 are stoppers provided at the two opposing corners of the pedestal 11, and 20 and 20 are stoppers provided at the two opposing corners of the pedestal 11. A guide pin provided to protrude above the stopper 19 positions both the upper and lower molds.

Next, the upper mold side will be explained based on FIGS. 4 and 5. In the figure, 21 is the upper mold pedestal, 22
23 is a circular outer plate retaining ring attached to the lower surface of this pedestal 21, and 23 is this outer plate retaining ring 2.
The outer plate retaining ring 22 has slits 24 radially spaced at appropriate angles on the inner circumference, The inner plate retaining ring 23 has slits 25 radially arranged on the outer periphery at appropriate angles and facing the slits 24 . 26 is a plate located between the two plate retaining rings 22 and 23 on the lower surface of the pedestal 21, both ends of which are inserted into the opposing slits 24 and 25, and the lower end of which is located below each of the plate retaining rings 22 and 23; be. 27 is the pedestal 11 of the lower mold.
pedestal 2 so that the guide pin 20 provided in
A bush 28 provided at 1 is a cylinder attached to the upper surface of the pedestal 21 in order to pressurize the upper mold to the lower mold. The method for attaching the two plate retaining rings 22 and 23 to the pedestal 21 is the same as that for the lower mold side. By the way, the above-mentioned mounting position of the plate 26 of the upper mold and the plate 1 of the lower mold
Regarding the mounting position 6, when in use, the upper mold plate 26 is placed between the lower mold plates 16, 16.
In other words, the plates 16 of the lower mold are positioned between the plates 26 of the upper mold, so that the plates 16 and 26 of the lower mold are interlocked with each other at different positions. Therefore, slit 1
The positions of 4, 15 and 24, 25 are also plate 16,
It is determined according to the mounting position of 26.

6 and 7 show a state in which film molding of a single molded product is performed using both the upper and lower molds, and a synthetic resin film 29 is sandwiched between the plates 16 and 26, and the film 29 is sandwiched between the plates 16 and 26. The portion is bent in a zigzag shape along the circumferential direction. Furthermore, as shown in FIG. 8, the film 29 can be used to obtain a speaker diaphragm core or the like, which is a single molded product having a complicated shape, with the peripheral portion thereof having an uneven shape along the circumferential direction.

Note that the pitch of the film molded product can be changed by appropriately changing the insertion positions of the plates 16, 26 without inserting the plates 16, 26 into all of the slits 14, 15 and 24, 25. By changing the shape, the shape of the film molded product can be changed. Furthermore, by changing the height of the stopper 19, the thickness of the film molded product can be easily changed.

By the way, in the embodiment described above, two guide pins 20 are provided, but the number does not need to be two as long as the number serves as a guide pin. Also, instead of the stopper 19, a stop mechanism may be provided on the rod of the cylinder 28. Also, each plate retaining ring 12, 13, 22,
23 does not have to be circular.

Effects of the Invention As described above, the present invention can easily construct a mold for molding a single piece of film with a complex zigzag shape by simply inserting the plate into the inner and outer plate retaining rings, thereby reducing the cost of the mold. is cheap,
Further, by changing the insertion position of the plate and the height or thickness of the plate, the pitch and zigzag shape of the film molded product can be easily changed.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a conventional example, FIGS. 2 to 7 show an embodiment of the present invention, FIG. 2 is an exploded perspective view of the lower mold, FIG. 3 is a cross-sectional view of the same, and FIG. The figure is an exploded perspective view of the upper mold, Figure 5 is a sectional view of the same, Figure 6 is a sectional view showing the state of use, Figure 7 is a view taken along the line X-X in Figure 6, and Figures 8 a to c. is a diagram explaining other molded products,
a and b are perspective views of the film before and after molding, and c is a YY arrow view of b. 11... Lower mold pedestal, 12, 13... Plate retaining ring, 14, 15... Slit, 16... Plate, 19... Stopper, 20... Guide pin, 21... Upper mold pedestal, 22, 23...Plate retaining ring, 24, 25...Slit, 26...Plate.

Claims (1)

[Claims] 1 A same plate retaining ring and an outer plate retaining ring are provided on each of the upper and lower pedestals and are arranged concentrically facing each other, and a retaining ring on the outer periphery of each concentric inner plate retaining ring and an inner periphery of the outer plate retaining ring, respectively, are provided on the upper and lower pedestals. Opposing radial slits are provided, and a plate is provided removably between the concentric inner plate retaining ring slit and outer plate retaining ring slit, and is attached to the upper pedestal side. Each plate and each plate attached to the lower pedestal side are arranged so as to be positioned between each plate in a facing relationship, and the upper mold is held by the inner and outer plate retaining rings on the upper pedestal side and the plates attached thereto. The lower mold is formed by the inner and outer plate retaining ring on the lower pedestal side and the plate attached to it, and the upper plate and the lower plate are configured to form a film by mutually different engagement with each other. Mold for film molding.