CN105979466B

CN105979466B - Manufacturing method of vibrating diaphragm of moving-iron type receiver

Info

Publication number: CN105979466B
Application number: CN201610429556.1A
Authority: CN
Inventors: 李梁
Original assignee: Shenzhen Bellsing Acoustic Technology Co Ltd
Current assignee: Shenzhen Everwin Precision Technology Co Ltd
Priority date: 2016-06-16
Filing date: 2016-06-16
Publication date: 2020-05-26
Anticipated expiration: 2036-06-16
Also published as: CN105979466A

Abstract

The invention provides a method for manufacturing a vibrating diaphragm of a moving-iron receiver, which comprises the following steps: respectively putting a plurality of vibrating wings into a multi-die-cavity forming jig, and carrying out feeding pretreatment; heating and forming the forming jig subjected to the feeding pretreatment; and opening the die and separating the vibrating wings of the molding jig subjected to the heating molding treatment. According to the invention, the integrally-formed multi-die-cavity forming jig is adopted, so that the multi-sheet vibrating diaphragm is formed at one time, the production efficiency of the vibrating diaphragm is greatly improved, the production cost is reduced, and the stability and the consistency of the vibrating diaphragm are effectively ensured.

Description

Manufacturing method of vibrating diaphragm of moving-iron type receiver

Technical Field

The invention relates to the technical field of moving-iron receivers, in particular to a method for manufacturing a vibrating diaphragm of a moving-iron receiver.

Background

The moving-iron telephone receiver generally comprises an induction coil, a magnet, a metal cover, a vibrating diaphragm, a rubber ring and a bracket, and the working principle of the moving-iron telephone receiver is that the electric energy is converted into the sound energy through the conversion from the electricity to the electricity and then to the sound. The sound emitted by the diaphragm is not directly coupled with air, but radiated out by the front sound outlet and the rear sound outlet after being damped, and the sound emitted by the diaphragm is made to be heard by the ears of people after passing through the acoustic elements (the sound cavity and the sound outlet), so that the function of the diaphragm is very important. The existing manufacturing method of the vibrating diaphragm of the moving-iron telephone receiver basically adopts a single forming method, namely only one vibrating diaphragm can be produced at a time, and the defects of the production method are low production efficiency, high cost and poor consistency.

Disclosure of Invention

The invention aims to provide a method for manufacturing a vibrating diaphragm of a moving-iron type receiver, which is used for solving the problems of low efficiency and poor consistency of the vibrating diaphragm production in the prior art.

The invention provides a method for manufacturing a vibrating diaphragm of a moving-iron receiver, which comprises the following steps:

respectively putting a plurality of vibrating wings into a multi-die-cavity forming jig, and carrying out feeding pretreatment;

heating and forming the forming jig subjected to the feeding pretreatment;

and opening the die and separating the vibrating wings of the molding jig subjected to the heating molding treatment.

Further, the operation of the feeding pretreatment specifically comprises:

covering the clean film on the forming fixture;

placing the material returning auxiliary frame on a forming jig so as to completely press the periphery of the thin film;

the vibrating diaphragm support component is placed on the forming jig, and positioning is carried out through the positioning holes in the two sides of the vibrating diaphragm support component and the positioning pins on the forming jig.

Further, the operation of carrying out the heating forming treatment on the forming jig subjected to the feeding pretreatment specifically comprises: and the molding jig subjected to feeding is stably placed on a platform of the heater to perform vacuum, mold closing, heating, molding, heat preservation and cooling treatment.

Further, the operation of opening the mold and performing vibration wing separation on the molding jig subjected to the thermal molding treatment specifically includes: and when the temperature is reduced to a low-temperature set value, opening the mold, taking out the molded vibrating diaphragm and the molding jig together, and separating the vibrating diaphragm into a plurality of monomers.

Further, the film is a polyurethane film.

Further, the operation of the heat treatment specifically comprises: and heating the molding jig from the room temperature to a set value at a heating rate of 20 +/-3 degrees per second.

Further, the operation of the heat preservation treatment specifically comprises: and (3) keeping the temperature within +/-3 ℃ of a set value after the heating current is cut off by utilizing thermal inertia, and controlling the heat preservation time to be 5-8 seconds.

Further, the set value is 135 ± 5 degrees.

The technical scheme of the invention has the beneficial effects that: through the multimode cave forming tool that adopts integrated into one piece to realize multi-disc vibrating diaphragm one shot forming, very big improvement the production efficiency of vibrating diaphragm, reduced manufacturing cost, and effectively guaranteed the stability and the uniformity of vibrating diaphragm.

Drawings

Fig. 1 is a schematic flow chart of a method for manufacturing a diaphragm of a moving-iron receiver according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.

The invention provides a method for manufacturing a vibrating diaphragm of a moving-iron receiver, which comprises the following steps as shown in figure 1:

step S101, respectively placing a plurality of vibrating wings into a multi-die hole forming jig, and carrying out feeding pretreatment;

in this embodiment, the operation of performing the feeding pretreatment specifically includes: firstly, respectively placing a plurality of vibrating wings into a multi-cavity forming jig, in the embodiment, 15 vibrating wings can be placed at most, each vibrating wing is correspondingly placed into a mold cavity of the forming jig, one side of a hole of each vibrating wing is close to a runway of the forming jig, the other side of the hole of each vibrating wing is a hinge side which is a hinge for motion of a vibrating diaphragm, and in the step, the cleanness of the environment is ensured, if no visible foreign matters such as fibers, dust and the like exist; then, covering the film which is cut into a proper size in advance on the forming jig, wherein the film is approximately centered and can completely cover the plane of the forming jig, obvious wrinkles cannot be formed after the film is laid, the film cannot be adhered with foreign matters, and specifically, the film can be a polyurethane film; placing the material returning auxiliary frame on a forming jig, completely pressing the periphery of the film, and enabling the vibrating diaphragm to have no obvious arch and wrinkle; and finally, placing the vibrating diaphragm support component on a forming jig, enabling the glue coating surface to face downwards, and correspondingly positioning the vibrating diaphragm support component through the positioning holes on two sides of the vibrating diaphragm support component and the positioning pins on the forming jig so as to finish the operation of feeding pretreatment.

Step S102, carrying out heating forming treatment on the forming jig subjected to the feeding pretreatment;

in this embodiment, the molding jig after loading is stably placed on the platform of the heater, and no collision or large vibration occurs during the transportation process, so as to perform vacuum, mold closing, heating, molding, heat preservation and cooling treatment. Specifically, the vacuum equipment is started firstly, so that the vibrating wings are adsorbed in the acupuncture points of the forming jig, and the vacuum force can ensure that the vibrating wings cannot generate displacement in the whole forming process; then, closing the die, pressing the forming jig on a platform of the heater by the upper die under the action of the cylinder, wherein the surface of the upper die is covered with a layer of 2mm high-temperature-resistant foam, so that the mutual isolation and air tightness of 15 cavities on the forming jig can be facilitated, the sound of obvious gas leakage can not be heard by human ears, and the air inlet pressure of the cylinder is kept at about 6 kg; then turning on a heater to start heating, and heating the forming jig from room temperature to a set value at a heating speed of 20 +/-3 degrees per second, wherein the set value is 135 +/-5 degrees; then, opening the forming air pressure, and keeping the whole pressure at 5.5-5.8 kg, wherein the air tightness of the system is ensured in the whole process, so that the air flow can not be discharged by human ears; and the temperature is kept within +/-3 ℃ of a set value after the current of the heater is cut off by utilizing thermal inertia, and the heat preservation time is controlled to be 5-8 seconds; and finally, cooling, opening a cooling water electromagnetic valve, and cooling the temperature of the die to room temperature, wherein the temperature of cooling water is controlled to be 8-10 ℃, and the cooling speed is more than 8 ℃ per second.

And step S103, opening the mold of the molding jig subjected to the heating molding treatment and performing vibration wing separation.

In this embodiment, after the temperature dropped to the low temperature setting value, open the mould to reset all mechanisms simultaneously, together take out vibrating diaphragm and the shaping tool after the shaping, then with the vibrating diaphragm separation for a plurality of monomers, and place in the tray, thereby accomplish the course of working of vibrating diaphragm.

According to the invention, the integrally-formed multi-die-cavity forming jig is adopted, so that the multi-sheet vibrating diaphragm is formed at one time, the production efficiency of the vibrating diaphragm is greatly improved, the production cost is reduced, and the stability and the consistency of the vibrating diaphragm are effectively ensured.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for manufacturing a vibrating diaphragm of a moving-iron receiver is characterized by comprising the following steps:

respectively placing a plurality of vibration wings into a multi-die-cavity forming jig, and carrying out feeding pretreatment, wherein each vibration wing is correspondingly placed into a die cavity of the forming jig, one side of a hole of each vibration wing is close to a runway of the forming jig, the other side of the hole of each vibration wing is a hinge side, and the hinge is a hinge for vibrating diaphragm movement;

carrying out heating forming treatment on the forming jig subjected to feeding pretreatment, stably placing the forming jig subjected to feeding on a platform of a heater to carry out vacuum, mold closing, heating, forming, heat preservation and cooling treatment, starting vacuum equipment before carrying out heating forming treatment, and adsorbing vibrating wings in acupuncture points of the forming jig, wherein an upper mold is arranged above the forming jig, and the surface of the upper mold is covered with high-temperature-resistant foam with the thickness of 2 mm;

2. The method for manufacturing a diaphragm of a moving-iron receiver according to claim 1, wherein the operation of performing the feeding pretreatment specifically comprises:

covering the clean film on the forming jig;

placing the material returning auxiliary frame on the forming jig so as to completely press the periphery of the thin film;

and placing the vibrating diaphragm support component on the forming jig, and positioning the vibrating diaphragm support component through the positioning holes on two sides of the vibrating diaphragm support component and the positioning pins on the forming jig.

3. The method for manufacturing the diaphragm of the moving-iron receiver according to claim 1 or 2, wherein the operation of opening the mold and performing the separation of the vibrating wings on the molding jig after the thermal molding process specifically comprises:

and when the temperature is reduced to a low-temperature set value, opening the mold, taking out the molded vibrating diaphragm and the molding jig together, and separating the vibrating diaphragm into a plurality of monomers.

4. The method for manufacturing a diaphragm of a moving-iron receiver as claimed in claim 3, wherein the film is a polyurethane film.

5. The method for manufacturing a diaphragm of a moving-iron receiver according to claim 1, wherein the heating process specifically comprises: and heating the molding jig from the room temperature to a set value at a heating rate of 20 +/-3 degrees per second.

6. The method for manufacturing a diaphragm of a moving-iron receiver according to claim 1, wherein the heat-preservation process specifically comprises: and (3) keeping the temperature within +/-3 ℃ of a set value after the heating current is cut off by utilizing thermal inertia, and controlling the heat preservation time to be 5-8 seconds.

7. The method for manufacturing a diaphragm of a moving-iron receiver according to claim 5 or 6, wherein the set value is 135 ± 5 degrees.