CN101282596B - Method of manufacturing speaker diaphragms - Google Patents

Abstract

On one surface of a piece of wooden sheet (10) , a cloth or paper (13) is adhered to make an adhered sheet (15) (step a1). An approximately V-shaped notch (11) is provided on the adhered sheet (15) (step b1), the adhered sheet (15) is wetted to be softened, and a lubricant (16) which acts to keep water is impregnated thereinto (step c1). Edge portions (11a, 11b) of the notch (11) are overlapped, and the adhered sheet (15) is tentatively molded in an approximately horn shape by a first hot press molding (step d1). The adhered sheet (15) is then dried (step e1), impregnated with thermosetting resin (17) (step f1), and half-dried (step g1). The adhered sheet (15) is subject to a second hot press molding (step h1). A moisture-proof agent (18) is applied on the adhered sheet (15) (step i1), a center hole (25) for avoice coil and periphery are removed to make a speaker diaphragm (30) having a predetermined dimension and shape (step j1).

Description

The manufacture method of loudspeaker vibrating diaphragm

The application is that application number is 2004100044237, the applying date is on February 19th, 2004, denomination of invention is divided an application for the patent application of " loudspeaker vibrating diaphragm and dynamic loudspeaker ".

Technical field

The present invention relates to be used for the loudspeaker vibrating diaphragm of audio tweeter, the manufacture method of this vibrating membrane and dynamic loudspeaker.

Background technology

The known vibrating membrane great majority that are used for dynamic loudspeaker by paper pulp, plastics or for example the metal of aluminium make.These known vibrating membranes are made by punch forming one homogeneous material, and therefore, sound is identical mutually along the speed that each radial direction is propagated from the vibrating membrane center.So,, produce standing wave usually and resonance point occurs about known vibrating membrane.In addition, the sound pressure frequency characteristic is because of vibrating in the separation of low-frequency range and worsening.And, be arranged in lively performance or similar sensation will disappear.

In addition, though the vibrating membrane of being made by paper pulp or plastics has high relatively internal loss coefficient, their hardness (young's modulus) is bad, and its sonic propagation speed is low.The definition of the sound of regeneration is therefore unsatisfactory.On the contrary, the metal vibrating membrane by for example aluminium has the praetersonic propagation rate.Yet its internal loss coefficient is low, thereby amplitude fading is little.Therefore, the sound with regeneration can not clearly be separated the shortcoming of (that is to say that sound is not high).

Be different from the above-mentioned vibrating membrane of being made by existing material, it has merits and demerits simultaneously, and wooden vibrating membrane is required the loudspeaker vibrating diaphragm as the more naturetone of can regenerating.

The sonic propagation speed of timber changes according to the kind of timber.Yet generally speaking, timber has the sonic propagation speed higher than paper pulp.In addition, along the sonic transmissions speed of grain direction with different mutually along the sonic transmissions propagation rate of the direction vertical with texture.Timber has anisotropic propagation characteristic, and is high relatively along the propagation rate of grain direction (being called " longitudinal direction "), along relative low with the propagation rate of the vertical direction (being called " horizontal direction ") of texture.In addition, generally speaking, timber has the internal loss coefficient that is suitable as loudspeaker vibrating diaphragm, and its light and firm (high rigidity).

Therefore, about with the wooden vibrating membrane of timber, can not produce standing wave usually, and be difficult to occur resonance point as stock.So, can reckon with that compare with the existing vibrating membrane of being made by paper pulp, the sound pressure frequency characteristic in low-frequency range has been enhanced, and the definition and the acutance of regeneration sound can be enhanced.

The wooden vibrating membrane of various manufacturings or adopt the manufacture method of the dynamic loudspeaker of this wooden vibrating membrane in known document as described below, to be suggested.

In 62 (1987)-No. 224196 early stage publications of Japan of Sho (patent documentation 1), the loud speaker of the wood plastic synthetic (WPC) that utilization is thin and flat plank is made as the flat vibrating membrane of loud speaker described.Herein, this thin and flat plank is injected into for example plastics of polyester.

In 1 (1989)-No. 288100 early stage publication of Japan of Hei (patent documentation 2), the conical diaphragm 5 by fabrication schedule manufacturing shown in Figure 1A and 1B has been described.Shown in Figure 1A, one can form a ply 1 that is approximately tubaeform product obtains from a slice veneer 4.This ply 1 has a fan-shaped cutting part 1b who is positioned at its central circular cutting part 1a and certainly should circle cutting part 1a extends.Then, shown in Figure 1B, the two edges part b1 of fan-shaped cutting part 1b and b2 are overlapped at a lap 1c place, and bonding described approximate tubaeform to form with an adhesive.Thereafter, the moulding that is stamped of this ply 1 becomes a conical diaphragm 5.

In addition, in patent documentation 2, it is approximate tubaeform with one shown in the bonding Fig. 2 of the making B of an adhesive to have disclosed a plurality of little wooden sheet 2a to 2L shown in Fig. 2 A, and the moulding that is stamped then becomes a conical diaphragm 2.It has also disclosed and carried out moistureproof processing of physics or the moistureproof processing of chemistry on conical diaphragm 2 and 5.

In 5 (1993)-No. 83792 early stage publications of Japan of Hei (patent documentation 3), it is revealed to be molded as a conical audio frequency vibration film.This vibrating membrane is by following generation: utilize plasticiser plasticizing one synthetic thin slice by what a section constituted, this synthetic thin slice is equal to or less than the non-woven cloth that 80 microns extremely thin ply and binder resin be bonded at its surface by thickness and makes; Be stacked with a plurality of synthetic thin slices, heating and punching press.

In 6 (1994)-No. 178386 early stage publications of Japan of Hei (patent documentation 4), a conical diaphragm of announcement is by following generation: a thin and flat plank is cut into one fan-shaped; This veneer is equal to or greater than to be boiled in 10 the aqueous slkali preventing at vapours, hot water or pH value and cracks in moulding; The moulding that is stamped of this veneer becomes a taper shape.

In 10 (1998)-No. 304492 early stage publications of Japan of Hei (patent documentation 5), a vibrator vibrating membrane of announcement is by following generation: thin slice is pasted to make one in the surface that thin non-woven cloth or Japan paper adhere to a slice ply; This stickup thin slice is injected into a lubricant to produce tension force and elasticity; Having injected the stickup thin slice of lubricant is made approximate tubaeform by the hot pressing film.

In the early stage publication of 2000-59883 Japan (patent documentation 6), a loudspeaker vibrating diaphragm of announcement is by following generation.In order to generate a wooden loudspeaker vibrating diaphragm, it does not have wrinkle and crackle to produce in punch forming and it is along with the time is aging little, one thin non-woven cloth, Japan paper or carbon paper stick on a surface of a slice ply and go up to make a stickup thin slice, and this stickup thin slice is injected into thermosetting resin.Then, pasting thin slice is made approximate tubaeform by the hot pressing film.

About a wooden loudspeaker vibrating diaphragm, key is to handle the characteristic of timber, and timber is a kind ofly easily to split, the formability of difference and along with aging stock of time.

In above-mentioned patent documentation 1, because vibrating membrane is a flat vibrating membrane, with this vibrating membrane moulding with make the manufacture method that is approximately tubaeform (or conical) and do not have revealed.Respectively in the manufacture method of the patent documentation 2 shown in Figure 1A and 1B and Fig. 2 A and the 2B, when the wood characteristics of ply 1 and little wooden sheet 2a-2L is held by moulding.Therefore, when processing or this ply of punch forming, crackle may produce.In addition, because ply is pasted mutually with adhesive,, exist the sound property of expectation can not obtain the unwarrantable problem of dimensional accuracy because of adhesive portion becomes barrier.

In the method that discloses in the patent documentation 3, a plurality of extremely thin plys are stacked and punch forming, and it accurately handles more difficult.In addition, because have a plurality of adhered layers, it is heavy that the weight of vibrating membrane becomes because of the weight of adhesive.As a result, the sound property that can not obtain expecting.A large amount of adhesives has added minus effect for the sound pressure frequency characteristic.Thereby the method is bad.

In the manufacture method that in patent documentation 4, discloses, comprised the boiling process that is equal to or greater than 10 aqueous slkali with vapours or pH value.The method has been removed uniform lignin, and it is the composition material of timber.As a result, the intrinsic propesties of timber can not be manifested, and this has the opposite effect to sound matter.

The most important thing is, in the manufacture method that in patent documentation 2 to 4, discloses, usually crack, chap and wrinkle.Therefore, consider a large amount of productions of vibrating membrane, its output is very low.Therefore, can not realize its commercialization.

The manufacture method that discloses in patent documentation 5 and 6 is more suitable in large-scale production than the manufacture method that discloses in patent documentation 2 and 4.Yet the not talkative a large amount of productive manufacture method that provides enough molded property to become reconciled is implemented.Therefore, expectation further improves the molded property of wooden vibrating membrane, realizes that good outward appearance and a large amount of productivity are with the wooden vibrating membrane of commercialization.

Summary of the invention

Consider the problems referred to above, the present invention is suggested.A purpose of the present invention is for providing wooden loudspeaker vibrating diaphragm, and it is very effective aspect the sound property that improves an audio tweeter.Another object of the present invention is for providing the manufacture method with enough molded property and a large amount of productive wooden loudspeaker vibrating diaphragms.Another purpose of the present invention is for providing the dynamic loudspeaker with wooden loudspeaker vibrating diaphragm, its improve aspect the sound property very effective.

In order to address the above problem, the invention provides one and be approximately flaring loudspeaker vibrating diaphragm by what a slice ply was made, wherein: cloth or paper are secured at a surface of this ply; One comprises that the stickup thin slice of this ply and this cloth or paper makes approximate tubaeform by the marginal portion of the groove that is approximately V-arrangement of overlapping previous formation; Form when approximate tubaeform when pasting thin slice, be injected into moisture and preserve a composition material of material and be retained in and paste in the thin slice; The marginal portion of pasting the groove that is approximately V-arrangement of thin slice is pasted together with thermosetting resin, and this thermosetting resin is attached to the whole preceding and rear surface of pasting thin slice; And an anti-blushing agent is coated in and pastes before thin slice whole and on the thermosetting resin on the rear surface.

Herein, better, cloth or paper be secured on the ply so that the direction of the fiber of cloth or paper approximately perpendicular to the grain direction of ply.

Better, be approximately the center line of groove of V-arrangement basically along the grain direction of ply.

Better, ply is cut from solid wood, and in the scope of 4.5 to 6.0 thousand meter per seconds, the internal loss coefficient is in 0.02 to 0.03 scope along the sonic propagation speed of grain direction for this solid wood.

Better, the thickness of ply is 0.1 to 0.9 millimeter.

In addition, one dynamic loudspeaker is provided, this dynamic loudspeaker comprises the flaring loudspeaker vibrating diaphragm that is approximately that a slice ply makes, with one cover and be approximately hemispheric block on the centre bore that is formed at the loudspeaker vibrating diaphragm core, wherein: cloth or paper are secured at a surface of this ply; The one stickup thin slice that comprises this ply and this cloth or paper is made by the marginal portion of the groove that is approximately V-arrangement of overlapping previous formation and is approximately tubaeform; Form when approximate tubaeform when pasting thin slice, be injected into a composition material that moisture preserves material and paste in the thin slice being retained in; The marginal portion of pasting the groove that is approximately V-arrangement of thin slice is pasted together with thermosetting resin, and this thermosetting resin is attached to the whole front surface and the rear surface of pasting thin slice; And an anti-blushing agent is coated on the whole front surface and the thermosetting resin on the rear surface of pasting thin slice.

Herein, better, this cloth or paper be secured on this ply so that the direction of the fiber of cloth or paper approximately perpendicular to the grain direction of ply.

Better, this center line of groove that is approximately V-arrangement is basically along the grain direction of ply.

Better, this ply is cut from solid wood, and in the scope of 4.5 to 6.0 thousand meter per seconds, the internal loss coefficient is in 0.02 to 0.03 scope along the sonic propagation speed of grain direction for this solid wood.

Better, the thickness of this ply is the 0.1-0.9 millimeter.

In addition, provide the manufacture method of a loudspeaker vibrating diaphragm, a loudspeaker vibrating diaphragm is made by a slice ply in the method, this method comprises: a lubricant implantation step, soak and softening this ply, and inject lubricant, this lubricant so that moisture remain in the ply; One first punch steps, it temporarily is shaped to this ply one predetermined shape; One first drying steps, its drying temporarily are shaped to the ply of a shape of being scheduled to; One thermosetting resin implantation step, it is infused in ply dry in first drying steps with thermosetting resin; Half drying steps, its partial desiccation has been injected the ply of thermosetting resin; One second punch steps, it will be shaped to a predetermined shape by semiarid ply by heating and punching press in the partial desiccation step; And an anti-blushing agent coating step, it is coated to anti-blushing agent the ply that is shaped to reservation shape.

Better, before the lubricant implantation step, comprise that further one pastes the step quilt, its paste in advance a cloth or paper to a surface of ply so that ply becomes the stickup thin slice.

Better, when this reservation shape is one approximate when tubaeform, before the lubricant implantation step, further comprise a groove cutting step, it forms a groove that is about V-arrangement on ply, in first punch steps, the marginal portion of the groove of the approximate V-arrangement of ply/stickup thin slice is superimposed, heating and punching press and temporarily this ply/stickup thin slice is shaped to approximate tubaeform, and further comprise a center and periphery excision step after the anti-blushing agent coating step, it is from the centre bore that is shaped to approximate flaring ply/stickups thin slice excision voice coil loudspeaker voice coil and peripheral to make a loudspeaker vibrating diaphragm with a preliminary dimension and shape.

Better, before first punch steps, further comprise a locking and keep step, it is with latch instrument locking stamping forming extra-regional part in first punch steps, thereby when the marginal portion of the groove of ply/stickup thin slice was overlapping, ply/stickup thin slice was locked and is remained approximate tubaeform.

Better, when the groove that is approximately V-type forms on ply/stickup thin slice in the groove cutting step, one be used to engage ply/stickup thin slice groove the marginal portion and form with the integrated double pointed nail mechanism of ply, and before first punch steps, the marginal portion of groove engages with double pointed nail mechanism, thereby when when the marginal portion of the groove of ply/stickup thin slice is overlapping, ply/stickup thin slice is locked and is held in approximate tubaeform.

Better, provide an interleaving agent implantation step between second punch steps and anti-blushing agent coating step, it injects ply/stickup thin slice with interleaving agent; One second drying steps, its drying have injected the ply/stickup thin slice of interleaving agent; And one the 3rd punch steps, its heating and punching press dry ply/stickup thin slice in second drying steps is a reservation shape.

Better, after the partial desiccation step, further comprise a weight appraisal procedure, it is measured the weight of semiarid ply/stickup thin slice and it is returned the thermosetting implantation step during less than the scope of appointment when its weight.

Better, after second punch steps, further comprise a propagation rate appraisal procedure, it is measured the sonic propagation speed of ply/stickup thin slice and it is returned second punch steps during less than the propagation rate of appointment when its propagation rate.

Feature of the present invention, principle and application will become clearer from following detailed description with the accompanying drawing.

Description of drawings

In appended figure:

Figure 1A is the schematic diagram of the manufacture method of a known wooden vibrating membrane;

Figure 1B is the floor map of this known wooden vibrating membrane;

Fig. 2 A is the schematic diagram of the manufacture method of another known wooden vibrating membrane;

Fig. 2 B is the floor map of this another known wooden vibrating membrane;

Fig. 3 A is the schematic diagram that is used for the manufacture process of ply of the present invention;

Fig. 3 B is the floor map that is used for ply of the present invention;

Fig. 4 is the flow chart according to the manufacture method of first embodiment;

Fig. 5 is the detailed maps according to the manufacture method of first embodiment;

Fig. 6 is the detailed maps according to the manufacture method of first embodiment;

Fig. 7 is the floor map according to the loudspeaker vibrating diaphragm of the manufacture method generation of first embodiment;

Fig. 8 is the performance diagram that shows relation between the internal loss coefficient of various materials and the acoustic wave velocity (longitudinal direction);

Fig. 9 A to 9D is the schematic diagram according to the manufacture method of second embodiment;

Figure 10 A is the schematic diagram according to the manufacture method of the 3rd embodiment;

Figure 10 B is the side schematic view according to the loudspeaker vibrating diaphragm of the manufacture method generation of the 3rd embodiment;

Figure 11 is the flow chart according to the manufacture method of the 4th embodiment;

Figure 12 is the detailed maps according to the manufacture method of the 4th embodiment;

Figure 13 is the detailed maps according to the manufacture method of the 4th embodiment;

Figure 14 A is the floor map of first example of the double pointed nail of the 4th embodiment;

Figure 14 B is the plan view of second example of the double pointed nail of the 4th embodiment;

Figure 14 C is the plan view of the 3rd example of the double pointed nail of the 4th embodiment;

Figure 14 D is the plan view of the 4th example of the double pointed nail of the 4th embodiment;

Figure 15 is a perspective view of pasting thin slice, and this stickups thin slice locks by double pointed nail mechanism and remains one roughly tubaeform;

Figure 16 is the side schematic view according to the loudspeaker vibrating diaphragm of the manufacture method generation of the 4th embodiment;

Figure 17 is the flow chart according to the manufacture method of the 5th embodiment;

Figure 18 is the detailed maps according to the manufacture method of the 5th embodiment;

Figure 19 is the detailed maps according to the manufacture method of the 5th embodiment;

Figure 20 is the flow chart according to the manufacture method of the 6th embodiment;

Figure 21 is the schematic diagram of describing according to the manufacture method of the 6th embodiment;

Figure 22 is the schematic diagram of describing according to the manufacture method of the 6th embodiment;

Figure 23 is the flow chart according to the manufacture method of the 7th embodiment;

Figure 24 is the schematic diagram of describing according to the manufacture method of the 7th embodiment;

Figure 25 is the flow chart according to the manufacture method of the 8th embodiment;

Figure 26 is the detailed maps according to the manufacture method of the 8th embodiment;

Figure 27 is the detailed maps according to the manufacture method of the 8th embodiment;

Figure 28 is the schematic diagram of describing according to the manufacture method of the 8th embodiment;

Figure 29 is the schematic diagram of describing according to the manufacture method of the 8th embodiment;

Figure 30 is the schematic cross-section according to an example of the structure of the conical dynamic loudspeaker of the 9th embodiment;

Figure 31 is the schematic cross-section according to an example of the structure of the hemisphere dynamic loudspeaker of the tenth embodiment;

Figure 32 A be according to the employing of the 11 embodiment the preceding diagrammatic sketch of loudspeaker arrangement of conical dynamic loudspeaker;

Figure 32 B be according to the employing of the 11 embodiment the schematic cross-section of loudspeaker arrangement of conical dynamic loudspeaker;

Figure 33 be according to the employing of the 12 embodiment the preceding diagrammatic sketch of loudspeaker arrangement of conical dynamic loudspeaker and hemisphere dynamic loudspeaker;

Figure 34 A is the circuit diagram that is connected to the network circuit of a hemisphere dynamic loudspeaker;

Figure 34 B is the circuit diagram that is connected to the network circuit of a hemisphere dynamic loudspeaker;

Figure 34 C is the circuit diagram that is connected to the network circuit of a conical dynamic loudspeaker; And

Figure 35 is the performance diagram of sound pressure frequency characteristic, impedance operator and the distortion of the loudspeaker arrangement among Figure 33.

Embodiment

The manufacture method and the dynamic loudspeaker of loudspeaker vibrating diaphragm of the present invention, this loudspeaker vibrating diaphragm will be described with reference to the drawings.

＜the first embodiment 〉

At first, as shown in Figure 3A, the preparation process of making as loudspeaker vibrating diaphragm is cut out a ply 61 along its circumference as the log 6 of the wood raw material of loudspeaker vibrating diaphragm in rotary manner thinly by an exploitation cutter 7.This ply 61 is cut into suitable shape, and its size is bigger than moulding section.This moulding section will be made into the vibrating membrane of a reality.Shown in Fig. 3 B, formed a ply 10 with big and straight texture.Herein, the ply shown in Fig. 3 B 10 be the ply 61 shown in Fig. 3 A the enlarged diagram of a part.Broken circle in the ply 10 will be partly for being made into the moulding section of actual vibration film.For example, when loudspeaker vibrating diaphragm has when being about 8 centimetres aperture, to be about be a square or rectangular of 12 to 14 centimetres Yi Bian have, or diameter is about a circle of 12 centimetres and will be used.

Then, will be in conjunction with the manufacture method of Fig. 4 to 6 explanation according to first embodiment.In Fig. 4 (A) among (a1) to (j1) flow process and Fig. 5 in the processing of (a1) to (f1) and Fig. 6 oneself (g1) corresponding to the processing of (j1).Comprise that according to the manufacture method of first embodiment it is stock preparation process described in Fig. 3 A and the 3B that generation step (p) ten steps from (a1) to (j1) afterwards of ply 10, this ply 10 generate steps (p).As shown in Figure 7, following steps are carried out in proper order to form a loudspeaker vibrating diaphragm and are pasted step (a1) at 30: one, one groove cutting step (b1), a lubricant implantation step (c1), one first punch steps (d1), one drying steps (e1), one thermosetting resin implantation step (f1), half drying steps (g1), one second punch steps (h1), one anti-blushing agent coating step (i1), and a center and periphery excision step (j1).

Below, describe each step in detail in conjunction with Fig. 5 and 6.In Fig. 5, be on the surface of ply 10 of 0.1 to 0.9 millimeter (being preferably 0.3 millimeter) at a thickness, paste thin cloth or the thin paper 13 that a thickness is about 0.02 to 0.30 millimeter with adhesive and be about foursquare stickup thin slice 15 (pasting step (a1)) to form one.Non-woven cloth is suitable as this cloth.Herein, this non-woven cloth is made by the material of for example material with carbon element or other synthetic resin, wherein fiber do not pass through knitting, braiding or similar processing and make cloth.Japan paper is suitable for as above-mentioned paper.

When the direction of the fiber of cloth or paper 13 was roughly same direction, the direction of the fiber of cloth or paper 13 and the grain direction of ply 10 (arrow f) approximate vertical were best.The intensity of scissile ply 10 can improve significantly.

With rear surface, the surface of the stickup thin slice 15 of cloth or paper 13 as the loudspeaker vibrating diaphragm of making 30.The above-mentioned thickness of ply 10 is the suitable loudspeaker vibration film thickness of having considered molded property, sound property and the aperture diameter of dynamic loudspeaker.

Then, a groove 11 that is approximately V-arrangement is set pasting on the thin slice 15, the top of this groove 11 is positioned at the core of this stickup thin slice 15, and a hole 12 (groove cutting step (b1)) is set near this top.Hole 12 is set before the groove 11 can prevents near the generation of when groove 11 forms, splitting its top forming.The shape in hole 12 is not limited, can be circle, ellipse, hexagon or similarly diameter be several millimeters shape.The center line m of this groove 11 is usually along the grain direction (arrow f) of pasting thin slice 15.

Thereafter, the stickup thin slice 15 with groove 11 and hole 12 is dipped to softening, and is injected into lubricant 16 (lubricant implantation step (c1)), and this lubricant 16 can make moisture be kept to paste in the thin slice 15.For example, this stickup thin slice 15 is soaked in lubricant 16 liquid that are contained in container 16c 5 to 60 minutes, thereby makes lubricant to inject wherein fully.This step can prevent that this thin slice from splitting in the first drop stamping forming process that next will carry out, and high yield ground this thin slice of moulding temporarily.

Inventor's research clearlys show: as, the aqueous solution that has dissolved sugar lime can improve its molded property of lubricant 16 more effectively than pure water or aqueous slkali.In addition, the aqueous solution that one of comprises at least in sugar lime, glycerine and the amino acid is effective as lubricant 16.A preferred example that comprises the lubricant 16 of this sample ingredient is a sake.

Next, when the marginal portion 11a of the groove 11 that is approximately V-arrangement and 11b are overlapped, the stickup thin slice 15 that has injected lubricant 16 temporarily is pressed into by a decompressor P1 through the first drop stamping forming process and is about approximate tubaeform (first punch steps (d1)), this decompressor P1 is a metal die of being made up of a mold 31 and a bed die 32, and mould all has heater 33 up and down.Bed die 32 comprises a protrudent pin 321, and mold 33 comprises a recess 311 that matches with this protrudent pin 321.In first punch steps (d1), be arranged on the hole 12 of pasting thin slice 15 centers and make protrudent pin 321 can insert the position of wherein passing, thereby stickup thin slice 15 can be determined with respect to the position of bed die 32.Mold 31 can be determined by recess 311 and cooperating also of protrudent pin 321 with respect to the position of bed die 32.Thereby hot-forming and workability position accuracy of pasting in thin slice 15 moulding is enhanced, and has therefore improved efficient and its output of large-scale production.

Herein, the best of the first drop stamping moulding is provided with condition and is: pressure is about 1 to 10 kilogram, and the metal pattern temperature of mold 31 is about 80 to 150 ℃, and the metal pattern temperature of bed die 32 is about 100 to 200 ℃, and the punching press time is about 2 to 60 seconds.Paste in the thin slice 15 because keep the lubricant 16 of material to be injected into, can in the first drop stamping moulding, not become dry fully so paste thin slice 15 as moisture.

, be placed into a drying oven (temperature is 50 to 60 ℃) by the stickup thin slice 15 of temporary transient moulding thereafter, in about 10 to 30 minutes to become dry (drying steps (e1)) not shown drying oven fully.At this moment, the moisture of lubricant 16 keeps the composition of material to be left in the stickup thin slice 15.

Then, the stickup thin slice 15 of this drying is injected into thermosetting resin 17 (thermosetting resin implantation step (f1)).For example, paste thin slice 15 and be soaked in thermosetting resin 17 liquid that are contained among the container 17c about 30 to 180 minutes, so that thermosetting resin fully injects wherein.Phenolic resins is suitable as this thermosetting resin 17.

In Fig. 6, the stickup thin slice 15 that is injected into thermosetting resin 17 is placed in the drying oven (50 to 60 ℃) about 1 to 10 minute with partial desiccation thermosetting resin 17 (partial desiccation step (g1)), not shown drying oven.This partial desiccation state is so-called " being dried to contact condition ", and promptly thermosetting resin 17 does not have the viscosity contact.Need to prove that if carry out ensuing second punch steps immediately after thermosetting resin injects, thermosetting resin 17 will be bonded on the metal die.Therefore, when stickup thin slice 15 peeled off after punching press, pasting thin slice 15 will split or tear, and this seriously reduces output.On the contrary, if thermosetting resin 17 is completely dried, the molded property of then pasting thin slice 15 can reduce, and crackle also occurs easily.By partial desiccation thermosetting resin 17, paste thin slice 15 and in the ensuing second drop stamping moulding, crackle can occur hardly.Thereby its output can obviously be improved.

Then, use with first punch steps (d1) in decompressor have the decompressor P2 of analog structure, the stickup thin slice 15 with partial desiccation thermosetting resin 17 is by drop stamping moulding once more (second punch steps (h1)).Herein, the best of the second drop stamping moulding is provided with condition and is: stamping pressure is about 20 to 40 kilograms, and the metal pattern temperature of mold 34 is about 80 to 200 ℃, and the metal pattern temperature of bed die 35 is about 100 to 200 ℃, and the punching press time is about 10 to 100 seconds.

After the second drop stamping moulding, volatile composition is evaporated, and pastes thin slice 15 and be formed as one stable approximate tubaeform.Need to prove, paste the marginal portion 11a of the groove that is approximately V-arrangement 11 in the thin slice 15 and the lap of 11b and paste, and closely paste and moulding, thereby its unevenness almost can not be identified by punch forming by the curing of thermosetting resin 17.In addition, thermosetting resin 17 sticks on the front surface and rear surface of pasting thin slice 15.

Next, after the second drop stamping moulding, anti-blushing agent 18 usefulness brushes or be coated in the preceding and rear surface of pasting thin slice 15 by immersion, then, air dry or in drying oven, dry this anti-blushing agent 18 (anti-blushing agent coating step (i1)) fully.This anti-blushing agent 18 will be coated in the whole preceding and rear surface that has been covered by thermosetting resin 17 of this stickup thin slice 15.For example, the mixture of polyurethane and polyester polyol is used as this anti-blushing agent 18.The stickup thin slice 15 that the application of this anti-blushing agent 18 will enable to make loudspeaker vibrating diaphragm has little of moist aging in time degree, thereby makes it have good durability.

At last, the centre bore of voice coil loudspeaker voice coil 25 and paste thin slice 15 be coated with the peripheral cut of anti-blushing agent 18, thereby the loudspeaker vibrating diaphragm 30 with specific dimensions is made into (center and periphery excise step (j1)).

As shown in Figure 7, in the loudspeaker vibrating diaphragm 30 of manufacturing, certainly being pierced in all radial directions (for example: da is to the direction of dh) that send with the centre bore 25 as voice coil loudspeaker voice coil, only the da direction is along the direction of texture.Arbitrary other directions all intersect with certain angle and texture.Therefore, all different in big multidirectional sonic propagation speed, standing wave can not produce usually, and resonance point is difficult to take place.Thereby the crackle vibrational energy is suppressed.

In addition, made by timber based on loudspeaker vibrating diaphragm 30, this loudspeaker vibrating diaphragm 30 has good sound property.In addition, because the injection of lubricant and thermosetting resin, the application of anti-blushing agent, the arrangement of drop stamping forming step series, or the like, loudspeaker vibrating diaphragm 30 has little of moist aging degree in time, long life-span and beautiful wood grain appearance.It should be noted that: though this manufacturing process is simple, its output is very high, and its large-scale production power is very good, and manufacturing cost has been lowered simultaneously.

Herein, the timber that is fit to do the material of loudspeaker vibrating diaphragm is considered.Fig. 8 shows the internal loss coefficient of various timber and is used to make the conventional materials aluminium of vibrating membrane and the curve chart of paper sonic propagation speed (longitudinal direction) correlation.Following table 1 has shown density, modulus of direct elasticity, sound transmission speed and the internal loss coefficient (tand) of various timber.Can be clear that from Fig. 8 and table 1 solid wood is a good material normally, it has suitable internal loss coefficient and high sonic propagation speed, and sandwich panel is not good material (some G, H, I and J) usually.Especially, obviously, (some C) is the most suitable for birch (some A) and beech.

What need to indicate is: the some A among Fig. 8 is birch (solid wood), other as described below: some B is bodhi tree (solid wood); Point C is beech (solid wood); Point D is oak (solid wood); Point E is cherry (solid wood); Point F is dragon spruce (solid wood); Point G is bodhi tree sandwich panel (concentric); Point H is the lauan sandwich panel; Point I is medium density fibre board (MDF) (MDF); Point J is a particle board.

Table 1

Title material	Density (kilogram/cubic meter)	Modulus of direct elasticity (* 109pa)	Sound speed (thousand meter per seconds)	The internal loss coefficient
					Birch	748.3	19.917	5.039	0.022
Bodhi tree	407.3	9.761	4.896	0.019
					Beech	690.7	15.49	4.736	0.025

Oak	684.7	12.687	4.305	0.023
					Cherry	551.4	9.994	4.258	0.021
Dragon spruce	345.4	6.25	4.254	0.027
					The bodhi tree sandwich panel	539.3	4.448	2.872	0.03
The lauan sandwich panel	635.7	6.368	3.165	0.027
					MDF	797.2	5.604	2.651	0.047
Particle board	750.6	3.642	2.203	0.057

(B) among Fig. 4 is the change example according to the manufacture method of first embodiment, and therein, (A) the stickup step (a1) in is omitted.In other words, cloth or paper 13 are not adhered on the surface of ply 10, and above-mentioned carries out on ply 10 from groove cutting step (b1) to each step of center and periphery excision step (j1).Though cloth or paper 13 are not adhered to a surface of ply 10, loudspeaker vibrating diaphragm can be made into.

Yet thickness is about 0.1 to 0.9mm ply 10 and is easy to split in processing.Therefore, preferably at first carry out stickup step (a1) so that ply 10 is reinforced by cloth or paper 13.

＜the second embodiment 〉

With emphasis describe according to the manufacture method of second embodiment with according to not the existing together of the manufacture method of first embodiment, its description that exists together mutually will be done suitable omission.The characteristics of second embodiment are: not only a piece of cloth or paper 13 stick to a surface of this ply 10, the centre that also has a piece of cloth or paper 13 ' to adhere to this surface facing surfaces forms in the drop stamping moulding further to prevent crackle, and strengthens the intensity of the neck around the centre bore 25 of voice coil loudspeaker voice coil of vibrating membrane.

That is to say that shown in Fig. 9 A, cloth or paper 13 entirely stick on the surface (rear surface) of ply 10, circular cloth or paper 13 ' stick on and the core of this surface facing surfaces (front surface) (pasting step (a2)) with bonding agent.The size of this circle cloth or paper 13 ' is equal to or less than the aperture (shown in Fig. 9 D) of dust cover 36, and greater than centre bore 25 (shown in Fig. 9 C).Identical with first embodiment, non-woven cloth or Japan paper are well suited for as this cloth or paper 13 '.

Thereafter, shown in Fig. 9 B, groove 11 and the hole 12 that is approximately V-arrangement is provided (groove cutting step (b2)).Then, the self-lubricating agent implantation step (c1) among Fig. 4 is performed to each step of center and periphery excision step (j1).Thereby shown in Fig. 9 C, loudspeaker vibrating diaphragm 40 is made into, and the neck around the centre bore 25 of the voice coil loudspeaker voice coil of this loudspeaker vibrating diaphragm 40 is strengthened by cloth or paper 13 ' at its front surface, and this voice coil loudspeaker voice coil has maximum amplitude.Can see that from the sectional view shown in Fig. 9 D the cloth or the paper 13 ' that are positioned at front surface are covered by dust cover 36, and can not damage its outward appearance.

＜the three embodiment 〉

With emphasis describe according to the manufacture method of the 3rd embodiment with according to not the existing together of the manufacture method of first embodiment, its description that exists together mutually will be done suitable omission.According to the loudspeaker vibrating diaphragm 30 of the manufacture method of first embodiment and second embodiment and 40 material is anisotropic timber.Therefore, as mentioned above, almost there is not the crackle vibration to take place.In the 3rd embodiment, loudspeaker vibrating diaphragm 50 has a plurality of cone top to suppress the crackle vibration fully.

That is to say, shown in Figure 10 A, using decompressor P2 ' to carry out in the second drop stamping moulding, this stickup thin slice 15 or ply 10 usefulness have the mold 34 ' of recessed portion 38 and have bed die 35 ' the drop stamping moulding (second punch steps (h3)) of ledge 39.Other step all manufacture method with first embodiment is identical.

Like this, shown in Figure 10 B, paste thin slice 15 or ply 10 by moulding and processing in, the loudspeaker vibrating diaphragm 50 with a plurality of cone top 37 is made by whole punch forming.Thereby the cone top of independent sector does not need, and the stickup step of the cone top of independent sector does not need yet.Therefore, the loudspeaker vibrating diaphragm 50 with a plurality of cone top can create cheaply.

＜the four embodiment 〉

The flow process to (j4) Zi (a4) among Figure 11 A is corresponding to process to (f4) Zi (a4) among Figure 12 and the process to (j4) Zi (g4) among Figure 13.Manufacture method according to the 4th embodiment comprises that being positioned at ply 10 generates step (p) ten steps Zi (a4) to (j4) afterwards, and this ply 10 generates the basic material preparation process of step (p) for describing in Fig. 3 A and Fig. 3 B.As shown in figure 16, one pastes step (a4), one groove cutting/double pointed nail mechanism forms step (b4), a lubricant implantation step (c4), one first punch steps (d4), one drying steps (e4), one heat reactive resin implantation step (f4), half drying steps (g4), one second punch steps (h4), an one anti-blushing agent coating step (i4) and a center and periphery excision step (j4) are carried out to form a loudspeaker vibrating diaphragm 60 by order.With emphasis describe according to the manufacture method of the 4th embodiment with according to not the existing together of the manufacture method of first embodiment, its description that exists together mutually will be done suitable omission.

In Figure 12, it is identical with stickup step (a1) among Fig. 5 to paste step (a4).Yet the stickup thin slice that forms in pasting step (a4) is defined as pasting thin slice 154.Groove 114, one holes 12 and a double pointed nail mechanism 14 that is approximately V-arrangement is set pasting on the thin slice 154, the top of this groove 114 is positioned at the core of this stickup thin slice 154, and this hole 12 be positioned at this groove the top near.At these double pointed nail mechanism 14 places, the overlapped so that whole stickup thin slice 154 of the marginal portion 114a of groove 114 and 114b (shadow region) is locked and is held in approximate tubaeform (a groove cutting/double pointed nail mechanism formation step (b4)).

The stickup thin slice 154 that description is had double pointed nail mechanism herein.The double pointed nail mechanism of the stickup thin slice 154 shown in Figure 12 and the 14A comprise one from the marginal portion of groove 114 114a outstanding be approximately that triangular protrusion divides marginal portion 114b that 14a1 and is provided at another side neighbouring be approximately leg-of-mutton opening portion 14b1.By ledge 14a1 being inserted among the opening portion 14b1, whole stickup thin slice 154 is locked and is held in as shown in figure 15 one approximate tubaeform.

The structure of double pointed nail mechanism 14 is not restricted to the structure shown in Figure 12 and the 14A.As shown in Figure 14B, being approximately triangular protrusion, to divide 14a1 and opening portion 14b1 may be ledge 14a2 and the opening portion 14b2 that is approximately T shape.In addition, this groove 114 may be zigzag groove 114 ' among Figure 14 C or the waveform groove 114 among Figure 14 D ", rather than the simple V-shaped groove shown in Figure 14 A and the 14B.In Figure 14 C, this double pointed nail mechanism 14 comprises that one is approximately the opening portion 14b3 that circular ledge 14a3 and is approximately T shape.In Figure 14 D, this double pointed nail mechanism 14 comprises ledge 14a4 and the 14b4 that has definite shape and cooperatively interact.

Be formed on the groove pasted on the thin slice 154 (114,114 ' or 114 ") and can be Any shape, become tubaeform (shape of cone) that is similar to as long as when marginal portion 114a and 114b are overlapped, paste thin slice 154 integral body.In addition, double pointed nail mechanism 14 can be any mechanism, can be used for locking and keep pasting thin slice 154 as long as adhesive for example, clip or similar elements are not used in the blank parts that its neutralization is positioned at the outer periphery of the moulding section (within the broken circle) of pasting thin slice 154.

In Figure 12, lubricant implantation step (c4) is identical with first punch steps (d1) respectively at the lubricant implantation step (c1) among Fig. 5 with first punch steps (d4).But marginal portion 114a and the ledge 14a of 114b and engage pin mechanism 14 and the opening portion 14b of the stickup thin slice 154 that has injected lubricant 16 by overlapping groove 114 is retained as approximate tubaeform.Then, this pastes thin slice 154 by the first drop stamping moulding (temporary transient moulding) moulding with decompressor P1.It should be noted that when in lubricant implantation step (c4), pasting thin slice 154 and inject the lubricant liquid 16 of container 16c it is one approximate tubaeform pasting that thin slice 154 can be engaged pin mechanism 14 lockings and remain on.

Because it is one approximate tubaeform that the shape of this stickup thin slice 154 remained with double pointed nail mechanism 14 before being placed on the decompressor P1, to place workability and be enhanced, the film system property in the first drop stamping moulding also has been enhanced.Therefore, wrinkle and crackle can be reduced.

Further, the drying steps among Figure 12 (e4) and thermosetting resin implantation step (f4) respectively with Fig. 5 in drying steps (e1) identical with thermosetting resin implantation step (f1).Partial desiccation step (g4) among Figure 13 and second punch steps (h4) respectively with Fig. 6 in partial desiccation step (g1) identical with second punch steps (h1).In addition, anti-blushing agent coating step (i4) and center and periphery excision step (j4) respectively with Fig. 5 in anti-blushing agent coating step (i1) and center and periphery to excise step (j1) identical.

Like this, loudspeaker vibrating diaphragm 60 shown in Figure 16 is made into.

Figure 11 B is the example according to the change of the manufacture method of the 4th embodiment, and wherein the stickup step (a4) among Figure 11 A is omitted.In other words, cloth or paper 13 are not adhered to a surface of ply 10, and above-mentioned carries out on ply 10 from groove cutting/double pointed nail mechanism formation step (b4) to each step of center and periphery excision step (j4).Though non-woven cloth or Japan paper 13 are not adhered on the surface of ply 10, loudspeaker vibrating diaphragm can be made.

Yet thickness is about 0.1 to 0.9 millimeter ply 10 and is easy to split in processing.Therefore, preferably at first paste step (a4) so that ply 10 is reinforced by cloth or paper 13.

＜the five embodiment 〉

With emphasis describe according to the manufacture method of the 5th embodiment with according to not the existing together of the manufacture method of first embodiment or the 4th embodiment, the description of identical point will be done suitable omission.The flow process to (j5) Zi (a5) among Figure 17 is corresponding to the process of (a5) to (f5) certainly among Figure 18 and the process from (g5) to (j5) among Figure 19.In manufacture method, paste thin slice 15 and have the groove 11 that the manufacture method that is used for first embodiment is approximately V, rather than have the stickup thin slice 154 of the double pointed nail mechanism of describing among Figure 14 A to Figure 14 D 14 according to the 5th embodiment.

Stickup step certainly among Figure 18 (a5) to the step of lubricant implantation step (c5) respectively with Fig. 5 in identical from pasting step (a1) to the step of lubricant implantation step (c1).In manufacture method according to the 5th embodiment, different with the manufacture method among the 4th embodiment, the marginal portion 11a and the 11b of the groove 11 of stickup thin slice 14 are overlapped, the zone that is positioned at outside the moulding section (blank parts) locks with a latch 26 and maintenance (locking and maintenance step (d51)), thereby, paste thin slice 15 and be made into one approximate tubaeform.The one fixing instrument of paper, for example stapler, clip can be used as this latch instrument 26.

Among the step to thermosetting resin implantation step (f5) among Figure 18 and Figure 19 from first punch steps (d52) from partial desiccation step (g5) step to center and periphery excision step (j5) respectively with Fig. 5 in the step from first punch steps (d1) to thermosetting resin implantation step (f1) identical with the step to center and periphery excision step (j1) among Fig. 6 from partial desiccation step (g1).

Like this, the loudspeaker vibrating diaphragm shown in Figure 19 70 is made into.

＜the six embodiment 〉

With emphasis describe according to the manufacture method of the 6th embodiment with according to not the existing together of the manufacture method of first embodiment, the description of identical point will be done suitable omission.Stickup step certainly among Figure 20 (a6) to the step of partial desiccation step (g6) respectively with Fig. 4 in stickup step certainly (a1) identical to the step of partial desiccation step (g1).

In the manufacture method according to the 6th embodiment, for the outward appearance of improving loudspeaker vibrating diaphragm and the output that improves loudspeaker vibrating diaphragm, the punching press time in second punch steps (h61) was shortened into about 2 to 30 seconds.In addition, interleaving agent implantation step (h62) will be described below, drying steps (h63) and the 3rd punch steps (h64).

As shown in figure 21, after the second drop stamping moulding in second punch steps (h61), be molded to and be approximately flaring stickup thin slice 15 and be soaked in the interleaving agent 46 among the container 46c, thereby this interleaving agent 46 is injected into wherein (interleaving agent implantation step (h62)).For example, silicon is used as this interleaving agent 46.Then, the stickup thin slice 15 that is injected into interleaving agent 46 is taken out drying (drying steps (h63)) from container 46c.

Then, as shown in figure 22, the 3rd drop stamping moulding is carried out (the 3rd punch steps (h64)) with a pressing equipment p3 on the stickup thin slice 15 that injects interleaving agent 46.This decompressor P3 comprises a mold 36 and a bed die 37, and mould all has heater 33 up and down.Bed die 27 has a protrudent pin 371, and mold 36 has the recess 361 that matches with this protrudent pin 371.

Herein, the best of the 3rd drop stamping moulding is provided with condition and is: pressure is about the 20-40 kilogram, and the metal pattern temperature of mold 36 is about 80 to 200 ℃, and the metal pattern temperature of bed die 37 is about 100 to 200 ℃, and the punching press time is about 2-60 second.

＜the seven embodiment 〉

The manufacture method of the 7th embodiment shown in Figure 23 is the improved manufacture method of the 6th embodiment.Stickup step certainly among Figure 23 (a7) to the step of partial desiccation step (g7) respectively with Figure 20 in stickup step certainly (a6) identical to the step of partial desiccation step (g6).In addition, second punch steps (h71) and the 3rd punch steps (h74) respectively with Figure 20 in second punch steps (h61) identical with the 3rd punch steps (h64).Once more, interleaving agent injection/drying steps (h73) is equal to interleaving agent implantation step (h62) and the drying steps (h63) of Figure 20.

In the 7th embodiment shown in Figure 23, a weight appraisal procedure (g71) is provided in partial desiccation step (g7) afterwards.That is to say that the weight of stickup thin slice 15 that has partial desiccation thermosetting resin 17 is measured, if this weight within the scope of appointment, then this stickup thin slice 15 carries out ensuing second punch steps (h71).If the scope that weighs less than appointment of this stickup thin slice 15, this stickup thin slice 15 turns back to thermosetting resin implantation step (f7).If this weight is higher than the scope of this appointment, it is processed that this stickup thin slice 15 is used as waste product.Like this, though when the injection degree of thermosetting resin 17 according to the characteristic of ply 10 its density and changing for example, the stickup thin slice 15 that only is in appropriate state could be selected.

According to every difference of pasting thin slice 15 (density is different or similarly different), the second unified drop stamping moulding may be not enough.Therefore, some changes relevant with hardness can take place in sonic propagation speed.Therefore, in the 7th embodiment shown in Figure 23, propagation rate appraisal procedure (h72) is provided at second punch steps (h71) afterwards.That is to say, after the second drop stamping moulding, paste the acoustic wave velocity of thin slice 15 and measured by propagation rate measurement mechanism 45 shown in Figure 24.Especially, as shown in figure 24, for example, a yttrium-aluminium-garnet (YAG:yttrium aluminum garnet) laser 41 is by pulsed drive, and by the pulse that yttrium aluminium garnet laser 41 produces, ultrasonic vibration is being pasted generation on the thin slice 15.This ultrasonic vibration is detected device 42,43 and measures, and sonic propagation speed postpones to draw from the ultrasonic vibration between detector 42 and 43 by a displacement meter and fast fourier transform (FET) analyzer 44.Have the stickup thin slice 15 that is equal to, or greater than the speed of specifying propagation rate and proceed ensuing interleaving agent injection/drying steps (h73), the stickup thin slice 15 that has less than the speed of assigned rate is returned to second punch steps (h71).

By the propagation rate assessment at least once in the propagation rate appraisal procedure (h72), sound property can be stabilized and output can be enhanced.

＜the eight embodiment 〉

The 8th embodiment one is used for the manufacture method that is approximately hemispheric loudspeaker vibrating diaphragm of hemisphere dynamic loudspeaker.The flow process of (a8) to (i8) certainly in Figure 25 is corresponding to the process of (a8) to (d8) certainly among Figure 26 and the process from (e8) to (i8) among Figure 27.Manufacture method according to the 8th embodiment comprises nine steps of (a8) to (i8) certainly.These nine steps are positioned at after ply 108 forms, and are similar to the ply 10 that forms in the basic material preparation process of describing among Fig. 3 A and the 3B.As shown in figure 27, one pastes step (a8), one lubricant implantation step (b8), one first punch steps (c8), a drying steps (d8), a thermosetting resin implantation step (e8), half drying steps (f8), one second punch steps (g8), an anti-blushing agent coating step (h8) and a periphery excision step (i8) are carried out being approximately hemispheric loudspeaker vibrating diaphragm 80 to form one in passing.

Therebetween, between partial desiccation step (f8) and anti-blushing agent coating step (h8), one second punch steps (g81), an interleaving agent implantation step (g82), a drying steps (g83) and one the 3rd punch steps (g83) can be provided shown in dotted line.

Below, describe each step in detail in conjunction with Figure 26 and Figure 27.In manufacture method, can be omitted with the description of the manufacture method something in common of first embodiment according to the 8th embodiment.In Figure 26, one thickness is about 0.02 to 0.30 millimeter thin cloth or thin paper 138 usefulness adhesives and sticks on the surface of ply 108 that thickness is 0.1 to 0.9 millimeter (preferably being about 0.3 millimeter), is approximately foursquare stickup thin slice 158 (pasting step a8) to form one.The area of ply 108 is less than the area that is used for making the ply 10 that is approximately flaring loudspeaker vibrating diaphragm 30,40,50,60 and 70 in first to the 7th embodiment.The surface that is stained with cloth or paper 138 of pasting thin slice 158 is used as the rear surface of the loudspeaker vibrating diaphragm of finishing 80.

In the manufacturing step that is approximately hemisphere loudspeaker vibrating diaphragm 80, for example, the groove of describing in Fig. 5 that is approximately V-arrangement 11 does not need to be provided.

This stickup thin slice 158 is soaked in the lubricant liquid 16 among the container 16c 5 to 60 minutes, thereby lubricant 16 is injected wherein (lubricant implantation step (b8)) fully.Then, with a decompressor P18, the stickup thin slice 158 that has injected lubricant 16 passes through the first drop stamping moulding and the approximate hemisphere (the first punch steps c8) of temporary transient moulding.This decompressor P18 is the metal die that comprises mold 438 and bed die 428, and each mould all has heater 338.Next, the stickup thin slice 158 of this temporary transient moulding is put in the drying oven with bone dry (drying steps (d8)), and drying oven does not illustrate in the drawings.

In Figure 27, dried stickup thin slice 158 is soaked in the liquid of the thermosetting resin 17 among the container 17c about 30 to 180 minutes, thereby thermosetting resin 17 is injected this stickup thin slice 158 (thermosetting resin implantation step (e8)) fully.This stickup thin slice 158 that has injected thermosetting resin 17 is put into a drying oven, and thermosetting resin 17 is by partial desiccation (partial desiccation step (f8)), and drying oven does not illustrate in the drawings.

Thereafter, use the decompressor P28 with decompressor P18 structural similarity, the stickup thin slice 158 of thermosetting resin with half oven dry is by drop stampings once more (second punch steps (g8)).This decompressor P28 is made up of a mold 458 and a bed die 448.After the second drop stamping moulding, volatile ingredient is evaporated, and stickup thin slice 158 is molded to stable approximate hemisphere.

In addition, after the second drop stamping moulding, anti-blushing agent 18 usefulness brushes or wherein be coated on the preceding and rear surface of pasting thin slice 158 by immersing, then this anti-blushing agent 18 by air dry or in baking box bone dry (anti-blushing agent coating step (h8)).At last, be coated with stickup thin slice 158 peripheral cut of anti-blushing agent 18, have a preliminary dimension thus and be approximately hemispheric vibrating membrane and be made into (periphery excision step (18)).

And in the 8th embodiment, the step between partial desiccation step (f8) and anti-blushing agent coating step (h8) is not restricted to second punch steps (g8).Similar to the 6th embodiment that Figure 20 describes, second punch steps (g81) as shown in figure 29, interleaving agent implantation step (g82), drying steps (g83) and be provided with the 3rd punch steps (g83) of a decompressor P38.This decompressor P38 by a mold 488 and once film tool 478 form.Therefore, the output of pasting thin slice 158 can improve, and the completion rate of forming process is further improved.

＜the nine embodiment 〉

The 9th embodiment shown in Figure 30 has shown the example of structure of the conical dynamic loudspeaker 100 that is approximately flaring loudspeaker vibrating diaphragm 30,40,50,60 or 70 in a usefulness first to the 7th enforcement.

As shown in figure 30, this taper shape dynamic loudspeaker 100 comprises: this is approximately flaring loudspeaker vibrating diaphragm 30,40,50,60 or 70; Be used to support the edge 101 of this loudspeaker vibrating diaphragm 30,40,50,60 or 70; One muffler 102; One sticks on a packing ring 103 of these edge 101 peripheries; One framework 104; One cover loudspeaker vibrating diaphragm 30,40,50,60 or 70 centre bore 25 (referring to figure such as Fig. 7) be approximately hemispheric block 105; One is loudspeaker vibrating diaphragm 30,40, and 50,60 or 70 provide the voice coil loudspeaker voice coil coil pipe 106 of actuating force; One is wrapped in the sound coil 107 on this voice coil loudspeaker voice coil coil pipe 106; One magnet 108; One upper plate 109; One electrode slice 110 and a back plate 111.This is tubaeform, and dynamic loudspeaker 100 is used as gamut loud speaker or one bass/Squawker.

Incidentally, the hemispheric block of the shape and size that are approximately hemispheric loudspeaker vibrating diaphragm 80 in the 8th embodiment and being approximately of the centre bore 25 that covers loudspeaker vibrating diaphragm 30,40,50,60 or 70 105 is closely similar.Therefore, this loudspeaker vibrating diaphragm 80 can be used as block 105.Like this, at the front surface of conical dynamic loudspeaker 100, wooden loudspeaker vibrating diaphragm 30,40,50,60 or 70 combines with wooden loudspeaker vibrating diaphragm 80.Thereby whole conical dynamic loudspeaker has well, high-quality outward appearance and uniformity.

＜the ten embodiment 〉

The tenth embodiment shown in Figure 31 has shown the example of structure of a usefulness according to the hemisphere dynamic loudspeaker 200 of the hemispheric loudspeaker vibrating diaphragm 80 of being approximately of the 9th embodiment.

As shown in figure 31, this hemisphere dynamic loudspeaker 200 comprises: this is approximately hemispheric loudspeaker vibrating diaphragm 80; The protection thing 201 of one engagement; Be used to support the edge 202 of this loudspeaker vibrating diaphragm 80; One flange 203; One upper plate 204; One magnet 205; One sound coil 206; One electrode slice 207; One packaging material 208 and a back plate 209.This spheroidal dynamic loudspeaker 200 is used as high pitch loudspeaker.

＜the ten one embodiment 〉

The 11 embodiment shown in Figure 32 A and the 32B has shown the loudspeaker arrangement that is approximately conical loud speaker 100 300 among a usefulness Figure 30.Figure 32 A is the preceding diagrammatic sketch of this loudspeaker arrangement 300, and Figure 32 B is vertical cut-away view of this loudspeaker arrangement 300.This taper shape dynamic loudspeaker 100 is installed in the chest of being made by timber or plastics or is called as in the shell 301 of shell.

＜the ten two embodiment 〉

The 12 embodiment shown in Figure 33 shown among a usefulness Figure 30 conical dynamic loudspeaker 100 and the loudspeaker arrangement 400 of the hemisphere dynamic loudspeaker 200 among Figure 31.Figure 33 is the preceding diagrammatic sketch of this loudspeaker arrangement 400.Be installed in by timber or the made chest of plastics or be called as in the shell 401 of shell as the conical dynamic loudspeaker 100 of woofer with as the hemisphere dynamic loudspeaker 200 of tweeter to constitute one or two sound channel loudspeaker arrangement 400.Though do not show that squawk box can be added into the loudspeaker arrangement 400 that comprises three or more loud speakers with formation with similar element.

For hemisphere dynamic loudspeaker 200, network circuit 501 shown in Figure 34 A and the 34B and 502 series connection are to cut away basso.When as the frequency characteristic of the conical dynamic loudspeaker 100 of woofer when fluctuating around the crossover frequency, the network circuit 503 of the excision high pitch shown in Figure 34 C is connected.Annotate: the C1 among Figure 34 A to 34C, C2 and C3 are capacitor, and L1 and L2 are induction coil.

Research according to the inventor, compare with the known vibrating membrane of making by paper pulp or aluminium, in order further to improve the loudspeaker vibrating diaphragm 30,40,50 in each embodiment, 60, the reproduction sound in 70 and 80 and the definition of clear and melodious sound are in dynamic loudspeaker 100 and 200, in speaker unit 300 and 400, obviously, select to have timber the best of the lateral transport speed of the longitudinal propagation speed of 4.5 to 6.0 thousand meter per seconds and 2.0-4.5 thousand meter per seconds.

Especially, when longitudinal propagation speed within the scope of 4.5 to 6.0 thousand meter per seconds simultaneously lateral transport speed within the scope of 2.0 to 4.5 thousand meter per seconds the time, and have the internal loss coefficient when the timber within 0.02 to 0.03 the scope is selected for the making vibrating membrane, the improvement of sound matter clearly.Herein, birch (solid wood) is proved to be best material.Much less, other timber, beech for example, oak, cherry, or bodhi tree can be used to substitute birch.

Figure 35 has shown that the bore dia when conical dynamic loudspeaker 100 is 8cm, network circuit 502 shown in Figure 34 B is employed, the electric capacity of capacitor C2 is 1.5 microvolts, and sound pressure frequency characteristic, impedance operator and the distorted characteristic of the speaker unit the when induction coefficient of induction coil L1 is 0.18mH among Figure 33 400.The unit of sound pressure frequency characteristic and distorted characteristic is the dB of the left longitudinal axis, and the unit of impedance operator is the O of the right longitudinal axis.All sound pressure frequency characteristics, impedance operator and distorted characteristic are fabulous characteristic.

According to foregoing embodiment, can prove: the very effective sound property that improves audio tweeter of wooden loudspeaker vibrating diaphragm and dynamic loudspeaker, and degenerating in time not, for example be out of shape and split.In addition, can provide the manufacture method of loudspeaker vibrating diaphragm, use this method, the wooden loudspeaker vibrating diaphragm with enough molded property and extraordinary mass productivity can be made cheaply.

Understandable, for the person of ordinary skill of the art, modification of the present invention and change are conspicuous, and any conspicuous modification and change are all within the scope of claim of the present invention.

Claims (14)

1. the manufacture method of a loudspeaker vibrating diaphragm, a loudspeaker vibrating diaphragm (30,40,50,60,70) is made by a slice ply (10) in the method, and this method comprises:

One moisture is preserved material implantation step (c), soaks and softening this ply (10), moisture is preserved material (16) inject ply (10), and this moisture is preserved the aqueous solution of material (16) for one of comprising at least in sugar lime, glycerine and the amino acid;

One first punch steps (d), its temporarily this ply of moulding (10) be a predetermined shape;

One first drying steps (e), its drying temporarily are shaped to the ply (10) of predetermined shape;

One thermosetting resin implantation step (f), it is infused in ply (10) dry in first drying steps (e) with thermosetting resin (17);

Half drying steps (g), its partial desiccation have injected the ply (10) of thermosetting resin (17);

One second punch steps (h), it is a predetermined shape by heating and the type that is stamped to form semiarid ply (10) in partial desiccation step (g); With

One anti-blushing agent coating step (i), it is coated in molded ply (10) for predetermined shape with anti-blushing agent (18).

2. the manufacture method of loudspeaker vibrating diaphragm as claimed in claim 1 is characterized in that further comprising:

One pastes step (a), and it at first pastes a cloth or paper (13) is pasted thin slice (15) to a surface of ply (10) so that ply (10) becomes, and this stickup step (a) is provided at moisture and preserves material implantation step (c) before.

3. the manufacture method of loudspeaker vibrating diaphragm as claimed in claim 1 is characterized in that:

Reservation shape in first punch steps (d) and second punch steps (h) is one approximate tubaeform,

One groove cutting step (b) further is included in moisture and preserves material implantation step (c) before, and it goes up the groove (11) that formation one is approximately V-arrangement at ply (10),

This first punch steps (d) be one overlapping, heating and punching press ply (10) groove (11) marginal portion (11a, 11b) and temporarily this ply of moulding (10) be an approximate flaring step and

One center and periphery excision step (j) further are included in anti-blushing agent coating step (i) afterwards, its from be shaped to flaring ply (10) remove voice coil loudspeaker voice coil centre bore and the periphery to make a loudspeaker vibrating diaphragm (30,40,50 with preliminary dimension and shape, 60,70).

4. the manufacture method of loudspeaker vibrating diaphragm as claimed in claim 2 is characterized in that:

Reservation shape in first punch steps (d) and second punch steps (h) is one approximate tubaeform,

One groove cutting step (b) further is included in moisture and preserves material implantation step (c) before, and it goes up the groove (11) that formation one is approximately V-arrangement at stickup thin slice (15),

This first punch steps (d) be one overlapping, heating and punching press paste the groove that is approximately V-arrangement (11) on the thin slice (15) marginal portion (11a, 11b) and temporarily moulding this stickup thin slice (15) be similar to tubaeform and

One center and periphery excision step (j) further are included in anti-blushing agent coating step (i) afterwards, its from be shaped to approximate flaring stickup thin slice (10) remove voice coil loudspeaker voice coil centre bore and the periphery to make a loudspeaker vibrating diaphragm (30,40,50 with preliminary dimension and shape, 60,70).

5. the manufacture method of loudspeaker vibrating diaphragm as claimed in claim 3 is characterized in that further comprising:

One locks before and keeps step (d51) in first punch steps (d52), it is with a latch instrument (26) locking stamping forming extra-regional part in first punch steps (d52), thereby the feasible marginal portion (11a that works as the groove (11) of ply (10), when 11b) overlapping, ply (10) is locked and is remained on approximate tubaeform.

6. the manufacture method of loudspeaker vibrating diaphragm as claimed in claim 4 is characterized in that further comprising:

One locks before and keeps step (d51) in first punch steps (d52), it is with latch instrument locking stamping forming extra-regional part in first punch steps (d52), thereby make the marginal portion (11a that works as the groove (11) of pasting thin slice (15), when 11b) overlapping, paste thin slice (15) and locked and be held in one approximate tubaeform.

7. the manufacture method of loudspeaker vibrating diaphragm as claimed in claim 3 is characterized in that:

When the groove that is approximately V-type (11) forms on ply (10) in groove cutting step (b), (11a 11b) and with the integrated double pointed nail mechanism (14) of ply (10) is formed in one marginal portion that is used to engage the groove (11) of ply (10); And

In first punch steps (d4) before, (11a 11b) engages with double pointed nail mechanism (14), thereby works as the marginal portion (11a of the groove (11) of ply (10) in the marginal portion of groove (11), when 11b) overlapping, ply (10) is locked and is held in approximate tubaeform.

8. the manufacture method of loudspeaker vibrating diaphragm as claimed in claim 4 is characterized in that:

When the groove that is approximately V-type (11) forms on stickup thin slice (15) in groove cutting step (b), one marginal portion that is used for engage pasting the groove (11) of thin slice (15) (11a, 11b) and with pasting thin slice (15) integrated double pointed nail mechanism (14) is formed; And

In first punch steps (d4) before, (11a 11b) engages with double pointed nail mechanism (14), thereby works as the marginal portion (11a of the groove (11) of pasting thin slice (15) in the marginal portion of groove (11), when 11b) overlapping, paste thin slice (10) and locked and be held in approximate tubaeform.

9. the manufacture method of loudspeaker vibrating diaphragm as claimed in claim 1 is characterized in that further comprising:

One interleaving agent implantation step (h62), it injects interleaving agent (46) in ply (10);

One second drying steps (h63), its drying have injected the ply (10) of interleaving agent (46); And

One the 3rd punch steps (h64), its heating and punching press dry ply (10) in second drying steps (h63) is a reservation shape,

This interleaving agent implantation step (h62), this second drying steps (h63) and the 3rd punch steps (h64) are provided between second punch steps (h61) and the anti-blushing agent coating step (i6).

10. the manufacture method of loudspeaker vibrating diaphragm as claimed in claim 2 is characterized in that further comprising:

One interleaving agent implantation step (h62), it injects interleaving agent (46) in pasting thin slice (15);

One second drying steps (h63), its drying have injected the stickup thin slice (15) of interleaving agent (46); And

One the 3rd punch steps (h64), its heating and punching press dry stickup thin slice (15) in second drying steps (h63) is a reservation shape,

This interleaving agent implantation step (h62), this second drying steps (h63) and the 3rd punch steps (h64) are provided between second punch steps (h61) and the anti-blushing agent coating step (i6).

11. the manufacture method of loudspeaker vibrating diaphragm as claimed in claim 1 is characterized in that further comprising:

One weight appraisal procedure (g71), it is measured the weight of semiarid ply (10) and weight is back to thermosetting implantation step (f7) less than the ply (10) of the scope of appointment, and this weight appraisal procedure (g71) is provided at partial desiccation step (g7) afterwards.

12. the manufacture method of loudspeaker vibrating diaphragm as claimed in claim 2 is characterized in that further comprising:

One weight appraisal procedure (g71), it is measured the weight of semiarid stickup thin slice (15) and weight is back to thermosetting implantation step (f7) less than the stickup thin slice (15) of the scope of appointment, and this weight appraisal procedure (g71) is provided at partial desiccation step (g7) afterwards.

13. the manufacture method of loudspeaker vibrating diaphragm as claimed in claim 1 is characterized in that further comprising:

One propagation rate appraisal procedure (h72), it is measured the sonic propagation speed of ply (10) and sonic propagation speed is back to second punch steps (h71) less than the ply (10) of the scope of appointment, and this propagation rate appraisal procedure (h72) is provided at second punch steps (h71) afterwards.

14. the manufacture method of loudspeaker vibrating diaphragm as claimed in claim 2 is characterized in that further comprising:

One propagation rate appraisal procedure (h72), it measure to be pasted the sonic propagation speed of thin slice (15) and sonic propagation speed is back to second punch steps (h71) less than the stickup thin slice (15) of the scope of appointment, and this propagation rate appraisal procedure (h72) is provided at second punch steps (h71) afterwards.

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