JPH0376080B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an apparatus for manufacturing a diaphragm for a speaker.

Conventional configurations and their problems Traditionally, speaker diaphragms have been mainly made of natural pulp materials, but the diaphragms are obtained through various complicated processes until they are completed, and pulp papermaking, pressurization, etc. Most of the processes, such as heat forming, separating from the steel, and cutting the inner and outer diameters, were done manually.
For this reason, many man-hour problems and quality problems tend to occur. On the other hand, diaphragms using thermoplastic sheets have recently been developed and are being put into practical use, and although the process from heating to forming is automated, the formed diaphragm-shaped sheet remains clamped until the next step. When moving to the punching process, the thermoplastic sheet may sag or the center may shift, and as a result, when the inner and outer diameters of the diaphragm are punched out during the punching process for speaker diaphragms, the dimensions become unstable, which is the cause of product defects. becomes. Then,
The cutting of the inner and outer diameters of the diaphragm is done manually. However, since forming is automated, the number of man-hours required for punching becomes a major problem.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a method and apparatus for manufacturing a speaker diaphragm that can also automate the punching process.

Structure of the Invention The speaker diaphragm manufacturing apparatus of the present invention includes a thermoplastic sheet supply section, a heating device that heats a molded portion of the thermoplastic sheet, and a feeding device that feeds out the thermoplastic sheet to a predetermined length. , a chuck device for clamping the thermoplastic sheet fed by the feeding device; and a chuck device movable in a direction perpendicular to the feeding direction of the thermoplastic sheet to heat the thermoplastic sheet clamped by the chuck device. The slide device includes a mold for molding the molded portion and a punching die for punching out the inner and outer diameters of the molded portion.

According to the structure of the present invention, while the thermoplastic sheet whose molded portion is heated and drawn out is clamped by the chuck device, the slide device is moved perpendicularly to the direction of movement of the thermoplastic sheet to perform molding and punching. In other words, after the clamped thermoplastic sheet is formed into the shape of a diaphragm, the punching process is performed by moving the punching die using a slide device while clamping it in the same position, so there is no positional shift during molding and punching, making it possible to form and punch. The extraction can be performed continuously and automation can be achieved, and the equipment can be simplified and the space occupied by the equipment can be reduced.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention is shown in FIGS. 1 to 8. In other words, A is the device body, B is the thermoplastic sheet, 1 is the air press for molding and punching, 2 is the slide cylinder of the slide device, 3 is the molding die set, 4 is the punching die set, 5 is the mold, and 6 is the punching die set. Cutting die, 7 is a slide adjustment stopper, 8 is a base, 9 is a slide guide rail, 10 is a slide bearing, 11 is a press plate, 12 is a guide bearing, 13 is a chuck part of a chuck device, 14 is a heater of a heating device, 15 is a heating plate (thermocompression press plate), 16 is a supply roll of a supply section that supplies material;
17 is a scrap cutting cutter, 18 is a fixed clamp, 19 is a scrap receiver, 20 is a control box, 21 is a finished product stock, 22 is a feeding device, C
is a scrap.

This manufacturing device includes a supply section 1 for thermoplastic sheet B.
6, a heating device 14 that heats the molded portion of the thermoplastic sheet B, a feeding device 22 that feeds out the thermoplastic sheet B to a predetermined length, and a chuck device that clamps the thermoplastic sheet B sent by the feeding device 22. 1
3, a mold 5 for molding the heated molded portion of the thermoplastic sheet B, which is movable in a direction perpendicular to the feeding direction of the thermoplastic sheet B and clamped by the chuck device 13, and the inner and outer diameters of the molded portion. It is equipped with a slide device 2 having a punching die 6 for punching out. The operation of this manufacturing apparatus will be explained according to the steps shown in FIG.
It is fed out to a predetermined length by. Next, a material clamping process is performed in which the thermoplastic sheet B is clamped by the operation of the chuck part 13, and the first part of the press 1
The mold 5 is lowered by the lowering operation, and the molding process of the heated portion of the thermoplastic sheet A performed previously in the material heating process is performed, and at the same time, the heater 14 is lowered to perform the molding process before molding and by the feeding device 22. A heating material heating process is performed at a predetermined position of the thermoplastic sheet B before being sent. In this case, the heating part has the area necessary for the molded part of the diaphragm, but the chucking part is related to dimensional accuracy, and the center of the diaphragm is molded with precision and the punching position is aligned, so the dimensions are stable at room temperature. It is important to clamp the unheated parts. The molding die set 3 is cooled by water cooling or the like, and the sheet B is molded in a state of flexibility and good elongation by heating in the material heating step. The die set moving process is performed by moving the die set to the first
As the slide cylinder 2 moves upward, the entire die set 3, 4 moves perpendicularly to the longitudinal direction of the thermoplastic sheet B, and the punching die 6 moves to the position of the forming die 5. In the inner/outer diameter punching process, by the second downward movement of the press 1, the outer periphery and center of the formed portion are punched out by the punching die 6 to have predetermined inner and outer diameters. In the next step, the die set return step, the slide cylinder 2 moves back as the press 1 moves up for the second time, and the mold 5 returns to its original position. In the finished product removal step, the finished product is removed from the punching die 6 by air blowing. Further, with the second upward movement of the press 1, the chuck portion 13 opens and the feed device 2
2 operates to feed out the sheet B, and first the heater 14
The heated part is sent to the forming position, and the first sheet material feeding process is performed. In this way, the above steps are continuously repeated and finished products are taken out one after another.
On the other hand, the punched sheet is cut by the cutter 17 in accordance with the operation of the press 1, and the sheet is cut into the scrap receiver 1.
Dropped to 9. FIG. 8 shows the processed state of the thermoplastic sheet corresponding to the process shown in FIG. 7, where P is the heated part, Q is the clamped part, and R
is the molded part, S is the punched part, and T is the finished product.

FIG. 9 shows a cone diaphragm N manufactured by this device, and FIG. 10 shows a speaker using this diaphragm N. In this figure, 23 is a plate with a pole piece, 24 is a ring-shaped magnet,
25 is the top plate, 26 is the voice coil, 2
7 is a damper, 28 is a dust cap, 29 is a frame, and 30 is a gasket.

Effects of the Invention According to the speaker diaphragm manufacturing apparatus of the present invention, the slide device is moved perpendicularly to the direction of movement of the thermoplastic sheet while the molded portion is heated and the thermoplastic sheet fed out is clamped by the chuck device. Then, molding and punching are performed. In other words, after the clamped thermoplastic sheet is formed into the shape of a diaphragm, the punching process is performed by moving the punching die using a slide device while clamping it in the same position, so there is no positional shift during molding and punching, making it possible to form and punch. The extraction can be performed continuously and automation can be achieved, and the equipment can be simplified and the space occupied by the equipment can be reduced. As a result, the quality of the speaker diaphragm is stabilized and the cost can be reduced, which has great industrial value.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an embodiment of the present invention, Fig. 2 is a perspective view seen from the opposite side, Fig. 3 is a plan view,
Fig. 4 is a cross-sectional view, Fig. 5 is a cross-sectional view taken along the line of Fig. 3, Fig. 6 is a partially enlarged view of Fig. 4, Fig. 7 is a process block diagram, and Fig. 8 is a processing state of the thermoplastic sheet. FIG. 9 is a half-sectional side view of the completed cone diaphragm, and FIG. 10 is a half-sectional view of the speaker. B... thermoplastic sheet, 2... slide cylinder of slide device, 5... mold, 6... punching die, 13... chuck part of chuck device, 14...
...Heater of the heating device, 16... Supply roll of the supply section, 22... Feeding device.

Claims (1)

[Claims] 1 A thermoplastic sheet supply section, a heating device that heats the molded part of the thermoplastic sheet, a feeding device that feeds out the thermoplastic sheet to a predetermined length, and a clamping device that clamps the thermoplastic sheet fed by this feeding device. a chuck device that is movable in a direction perpendicular to the feeding direction of the thermoplastic sheet, and a mold that molds the heated molded portion of the thermoplastic sheet that is clamped by the chuck device; A manufacturing device for a speaker diaphragm, which is equipped with a slide device having a punching die for punching out the inner and outer diameters.