JPS5927153B2 - Manufacturing method of speaker diaphragm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a speaker diaphragm in which a honeycomb-shaped material is used as a core material and a surface material is bonded to the surface of the core material.
To provide a method for manufacturing a diaphragm for a speaker that can uniformly expand a honeycomb material block without deforming the cell shape or generating unexpanded portions when expanding the honeycomb material block.

First, a method of manufacturing this type of speaker diaphragm will be explained.

FIG. 1 shows an unexpanded block of honeycomb-like elements.

This unstretched block 1 is made by laminating a large number of foils (for example, aluminum foil), and as shown in FIG. 2, adjoining foils 2 are bonded to each other in a predetermined size at a plurality of locations. The unexpanded block 1 shown in FIG. 1 is cut in the AA' direction to produce an unexpanded block 3 for one diaphragm as shown in FIG. 3. The unstretched block 3 for one diaphragm shown in FIG. 3 can be stretched parallel to the directions of arrows a and a' as shown in FIG. When it is rotated and expanded, a honeycomb-shaped core material in which many hexagonal cells are lined up is obtained. FIG. 6 shows a portion of the honeycomb-shaped core material 5 when it is rotated and expanded as shown in FIG. 5 and FIG. 10. The upper surface of the honeycomb-shaped core material 5 obtained in this way,
As shown in FIG. T, a flat diaphragm can be obtained by bonding surface materials 6, 6' to the bottom surface. 1
5 In a diaphragm using such a honeycomb-shaped core material, the hexagonal cells of the expanded honeycomb-shaped core material do not deform,
It needs to be spread evenly.

However, when cutting the unstretched block 1 in the A-A' direction as shown in FIG. They are bonded together and have the disadvantage that when expanded, some parts do not expand and the cell shape is deformed.

FIG. 8 shows an unexpanded pro 25 3 for one diaphragm that has been cut.

Cutting burrs are generated on the cut surface 3' of the unstretched block 3. In FIG. 8, T is an adhesive applied to the foil, and this adhesive 7 is used to bond the foils together.As shown in FIG. When an unstretched block in which cell lines were formed was stretched in parallel, as shown in FIG. 9, unstretched portions X and portions Y in which the cells were deformed occurred, and the blocks could not be expanded uniformly.

35 The present invention eliminates the above-mentioned conventional drawbacks, and one embodiment of the present invention will be described below.

FIGS. 10 and 11 show an apparatus for removing entangled cutting burrs. In Figures 10 and 11, 8
4 is a fixed roll rotatably supported by the substrate 9;
The fixed rolls 8 are arranged in a straight line.

10 is a motor connected to the fixed roll 8; 11 is a stretchable belt stretched across the four fixed rolls 8; when the motor 10 rotates, the fixed roller 8 connected to the motor 10 rotates. At the same time, other fixed rolls 8 are also rotated via the belt 11.

Reference numeral 12 denotes tension rolls arranged in parallel to the arrangement direction of the fixed rolls 8;
is biased in the fixed roll 8 direction.

Moreover, each tension roll 12 is arranged so as to be located between the fixed rolls 8. Reference numeral 13 denotes a stretchable belt stretched over the tension roll 12.

The distance l between the belts 11 and 13 is somewhat smaller than the thickness L of the cut foil of the unexpanded block 3 in the stacking direction. Reference numeral 14 denotes a guide, along which the unexpanded block 3 is supplied and inserted between the bell openings 1 and 13.

The unexpanded block 3 inserted between the belts 11 and 13 is
It is conveyed by the frictional force of the belt 11.

In this case, since a spring force is applied to the tension roll 12 in the direction of the arrow P, the unstretched block 3 is bent in the foil lamination direction along the curvature of the roll, as shown in FIG. 12, and is conveyed while meandering. be done. When the unstretched block 3 is bent in the direction in which the foils are laminated in this manner, the foils are shifted one by one, and the entanglement between the foils due to cutting burrs on the cut surfaces is eliminated. When the unstretched block 3 from which entanglement between the foils due to cutting burrs has been removed is stretched in parallel, it is uniformly stretched as shown in FIG. 13.

The present invention has the above configuration, and according to the present invention, there are no unexpanded portions or deformed cells in the honeycomb-shaped core material, and the honeycomb core material has the advantage of being uniformly expanded. be.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an unexpanded block made of honeycomb-like material, Fig. 2 is an enlarged top view of the main parts of the unexpanded block, and Fig. 3 is a cut unexpanded block obtained by cutting the unexpanded block shown in Fig. 1 at AN. FIGS. 4 and 5 are a perspective view of the block, and FIGS. 4 and 5 are top views showing the expanded state of the cut and unstretched block, respectively. FIG.
The figure is a side view showing the state in which the surface material is bonded to the core material, Figure 8 is a perspective view of the cut and unstretched block, Figure 9 is a view of the soil surface during the expansion of the core material by the conventional manufacturing method, and Figure 10. 11 is a front sectional view of the apparatus for implementing the manufacturing method of the present invention, FIG. 12 is a top view of the operating state of the apparatus shown in FIG. 10, and FIG. 13 is a top view of the apparatus in the manufacturing method of the present invention It is a top view of the process of expanding the core material. 1...Unexpanded block, 2...Foil, 3
......Cut and unstretched block, 3ζ...Cut surface, 5...Core material, 6,6'...Surface material, 8... Fixed roll, 9...Substrate, 1
0...Motor, 11...Belt, 12
...Tension roll, 13...Belt, 14...Guide.

Claims (1)

[Claims] 1. A first stretchable belt is stretched around a plurality of fixed rolls arranged in a straight line, and a second stretchable belt is stretched around a plurality of tension rolls arranged parallel to the arrangement direction of the fixed rolls. An unstretched block, which has a drive source that tensions the belt and rotates the fixed roll or the tension roll and can be expanded into a honeycomb shape, is inserted between the first and second belts, and the unstretched block is inserted between the first and second belts. 1st, 2nd
A method for manufacturing a speaker diaphragm, comprising stretching the unstretched block after conveying it while meandering between belts.