CN107786933B - Manufacturing method of preheating-formed loudspeaker vibrating piece - Google Patents
Manufacturing method of preheating-formed loudspeaker vibrating piece Download PDFInfo
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- CN107786933B CN107786933B CN201610792306.4A CN201610792306A CN107786933B CN 107786933 B CN107786933 B CN 107786933B CN 201610792306 A CN201610792306 A CN 201610792306A CN 107786933 B CN107786933 B CN 107786933B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
Abstract
A method for manufacturing a pre-heating formed loudspeaker vibrating plate comprises the steps of impregnation, drying, pre-heating, hot-press forming, cutting and the like. In the impregnation step, the base material is impregnated with a resin solution. In the drying step, the base material is dried. In the preheating step, the substrate is preheated in an environment where the preheating temperature is lower than the glass transition temperature of the resin. In the hot press molding step, a predetermined shape of the horn vibrating piece is formed on the base material by heating and pressing in an environment where the molding temperature is higher than the glass transition temperature of the resin. In the cutting step, the predetermined shape of the horn vibration piece is cut from the base material to obtain the horn vibration piece. Therefore, the invention simultaneously provides the base material containing the thermosetting resin and the thermoplastic resin to shorten the time for molding the loudspeaker vibrating piece and improve the manufacturing efficiency, and the manufactured loudspeaker vibrating piece can eliminate noise.
Description
Technical Field
The present invention relates to a method for manufacturing a vibrating plate of a loudspeaker, and more particularly, to a method for manufacturing a vibrating plate of a loudspeaker by preheating.
Background
Referring to fig. 1, a typical moving coil speaker 10 includes a power system, a drum paper 11 and a suspension system. The power system further comprises: magnet 15, pole piece, upper iron, gap and voice coil 14. The drum paper 11 is a diaphragm for moving air, and is generally a cone of cone or hemisphere shape. The suspension system is composed of structures such as an elastic wave 12 and a suspension edge 13 and is used for drawing the directional movement of the diaphragm. The principle of operation is that when current flows through the voice coil 14, an electromagnetic field is generated which is directed at right angles to the magnetic field of the permanent magnet 15 on the horn, which forces the moving coil to move within the gap (the gap between the voice coil 14 and the magnet 15). The mechanical force generated by this movement causes the paper 11 attached to the voice coil 14 to move vertically and up and down (vibrate), so that the air vibrates to emit audio to the human ear, thereby achieving the purpose of restoring sound for human listening and realizing the conversion of electric energy into sound energy.
Various non-metal parts contained in the general speaker 10 are made of cloth-made substrate, and the main reason is that the specially processed cloth-made substrate has suitable elasticity and strength to provide the required function of the speaker, such as the drum paper 11 and the elastic wave 12, and such non-metal parts are commonly called as speaker vibrating pieces. The speaker vibrating plate is made by the steps of impregnating a cloth base material with resin, drying, hot press molding and cutting. The conventional loudspeaker vibrating reed forming step is to move a base material into a hot press forming device, the hot press forming device comprises a forming device and a heating device, an upper die and a lower die of the forming device are matched with each other, so that the base material is pressed between the upper die and the lower die, and meanwhile, the heating device is also electrified to enable the upper die and the lower die to raise the temperature, so that the base material containing resin is pressed and heated to form the shape of the loudspeaker vibrating reed such as an elastic wave or a drum paper. The manufacturing method of the loudspeaker vibrating plate has the advantages that: the base material containing the thermoplastic resin and the base material containing the thermosetting resin can be hot-press molded at the same time.
However, when the hot press molding device heats the substrate under pressure, the required heating temperature is about 200 ℃, and the time for each heating under pressure is about 10 seconds; in other words, the minimum time for each set of molds to stay on the substrate for molding is 10 seconds, so that only six parts can be molded in one minute, only thirty-hundred and sixty parts can be molded in each hour, and if the time required for conveying the substrate is added, the number of parts produced in each hour is absolutely less than thirty-hundred and sixty parts; further, if the heating temperature is lower, the time required for the upper and lower molds to press the base material is increased in order to obtain the same molding effect, and thus the productivity is lowered. In order to not destroy the properties of the substrate, the heating temperature is not usually too high, and thus, the production efficiency of the conventional loudspeaker vibrating reed manufacturing method cannot be improved for a long time.
In view of the above, the inventor of the present invention has developed a method for manufacturing a speaker vibrating reed by a preheat molding process, in which a preheat process is added between the drying and molding processes, a preheat temperature higher than the glass transition temperature of the resin is used to preheat the substrate, so that the resin is properly softened and has the property of plastic deformation, and then the substrate can be pressed and molded at room temperature as the molding temperature during the molding process, thereby shortening the time for molding the speaker vibrating reed and improving the manufacturing efficiency of the speaker vibrating reed.
It is known that thermosetting resins have properties such that they become viscous liquids and soften or flow when heated at temperatures exceeding the glass transition temperature, and have plasticity, but gradually cure and form, and once cured, they are not likely to soften or flow again by heating under pressure. That is, preheating at a preheating temperature higher than the glass transition temperature of the resin causes the thermosetting resin to be cured in the preheating step, and subsequent steps such as molding and cutting cannot be performed. It is conceivable that the method for manufacturing a horn diaphragm by the preheat molding is not suitable for manufacturing a horn diaphragm by a base material containing a thermosetting resin, but is suitable for manufacturing a horn diaphragm only by a base material containing a thermoplastic resin.
In view of the above, it is an objective of the present invention to provide a method for manufacturing a pre-heat-formed horn vibrating reed, which can simultaneously provide a substrate containing a thermosetting resin and a substrate containing a thermoplastic resin to shorten the time for forming the horn vibrating reed and improve the manufacturing efficiency of the horn vibrating reed.
Disclosure of Invention
The invention provides a method for manufacturing a horn vibrating reed by preheating molding, and provides a base material containing thermosetting resin and thermoplastic resin to shorten the time for molding the horn vibrating reed and improve the manufacturing efficiency.
In order to achieve the above object, the present invention provides a method for manufacturing a pre-heat formed horn diaphragm, comprising the steps of:
impregnation: a substrate impregnated with a resin solution;
drying: drying the base material;
preheating: preheating the substrate in an environment having a preheating temperature lower than the glass transition temperature of the resin;
hot-press molding: heating and pressing the base material to form at least one horn vibrating reed with a preset shape in an environment with a forming temperature higher than the glass transition temperature of the resin; and
cutting: cutting the predetermined shape of the horn vibrating piece from the substrate to obtain a horn vibrating piece.
According to a preferred embodiment, wherein the resin is a thermosetting resin, the preheating temperature is lower than the glass transition temperature of the thermosetting resin, and the forming temperature is higher than the glass transition temperature of the thermosetting resin. Preferably, the glass transition temperature of the thermosetting resin is an average of the glass transition temperatures of all kinds of thermosetting resins. Preferably, the glass transition temperature of the thermosetting resin is the glass transition temperature of a specific type of thermosetting resin.
According to a preferred embodiment, wherein the resin is a thermoplastic resin, the preheating temperature is lower than the glass transition temperature of the thermoplastic resin, and the molding temperature is higher than the glass transition temperature of the thermoplastic resin. Preferably, the glass transition temperature of the thermoplastic resin is an average value of the glass transition temperatures of all kinds of thermoplastic resins. Preferably, the glass transition temperature of the thermoplastic resin is the glass transition temperature of a specific type of thermoplastic resin.
According to a preferred embodiment, the glass transition temperature of the resin is an average of the glass transition temperatures of all kinds of resins, the preheating temperature is lower than the average of the glass transition temperatures of all kinds of resins, and the molding temperature is higher than the average of the glass transition temperatures of all kinds of resins.
The present invention has the effects of providing the base material containing thermosetting resin and the base material containing thermoplastic resin simultaneously to shorten the time for forming the loudspeaker vibrating reed, improve the manufacturing efficiency of the loudspeaker vibrating reed, and indeed improve the problems in the prior art.
Drawings
FIG. 1 is a schematic view of a horn configuration;
FIG. 2 is a flow chart of a method for fabricating a pre-heat formed horn diaphragm according to the present invention;
fig. 3 is a perspective view of a horn damper manufactured by applying the method for manufacturing a pre-heat formed horn diaphragm of the present invention.
Wherein the reference numerals are as follows:
10 horn
11 drum paper
12 elastic wave
13 overhanging fringe
14 voice coil
15 permanent magnet
20 base material
30 resin solution
40 drying device
50 preheating device
60 hot press forming device
70 cutting device
80 horn vibrating reed
Detailed Description
The embodiments of the present invention will be described in more detail with reference to the drawings and the reference numerals so that those skilled in the art can implement the embodiments after studying the specification.
Referring to fig. 2, fig. 2 is a flow chart illustrating a method for manufacturing a pre-heat formed speaker vibrating piece according to the present invention. The invention provides a method for manufacturing a preheating-formed loudspeaker vibrating plate, which comprises the following steps:
impregnation: a substrate 20 is immersed in a resin solution 30.
Drying: the substrate 20 is dried. More specifically, the substrate 20 is moved to a drying device 40, so that the resin on the substrate 20 is dried, and the substrate has suitable hardness, elasticity and toughness.
Preheating: preheating the substrate in an environment having a preheating temperature below the glass transition temperature of the resin. More specifically, the dried substrate 20 is moved to a preheating device 50, and the preheating device 50 provides a preheating temperature lower than the glass transition temperature of the resin, so that the substrate 20 is preheated in an environment where the preheating temperature is lower than the glass transition temperature of the resin.
Hot-press molding: and heating and pressing the base material to form at least one horn vibrating reed with a preset shape in an environment with a forming temperature higher than the glass transition temperature of the resin. More specifically, the preheated substrate 20 is moved to a hot press forming apparatus 60, the hot press forming apparatus 60 includes a heating structure and a forming mold, the forming mold includes an upper mold and a lower mold, the heating structure provides a forming temperature higher than the glass transition temperature of the resin to heat the upper and lower molds of the forming mold, the upper and lower molds of the forming mold provide the substrate 20 to be heated and pressurized in an environment where the forming temperature is higher than the glass transition temperature of the resin, so as to form the predetermined shape of the horn diaphragm on the substrate 20.
Cutting: and cutting the predetermined shape of the horn vibrating piece from the substrate to obtain the horn vibrating piece. More specifically, the base material 20 is moved to a cutting device 70, and the predetermined shape of the horn vibration piece is cut from the base material 20 by the cutting device 70 to obtain the horn vibration piece 80.
The horn vibration plate 80 formed in fig. 2 and 3 is an elastic wave. Other types of horn diaphragms 80, such as the cone 11 or the suspended rim 13 shown in fig. 1, can be manufactured by the base material 20 and the various devices described above, with the difference that the mold shape of the thermo-compression molding device 60 is different for each type of horn diaphragm 80.
Among them, the resin is classified into a thermosetting resin and a thermoplastic resin according to its properties.
In a preferred embodiment, the resin is a thermosetting resin, and the preheating temperature is lower than the glass transition temperature of the thermosetting resin. Therefore, the base material containing the thermosetting resin can not only achieve the purpose of preheating, but also can not be converted into a viscous liquid with plasticity, so that the base material can not be cured. Moreover, the molding temperature is higher than the glass transition temperature of the thermosetting resin. Thus, in the hot press molding step, the base material containing the thermosetting resin is preheated to a certain temperature, and thus can be rapidly heated to exceed the glass transition temperature thereof and appropriately softened to be converted into a viscous liquid state having a plastic deformation property, and is press-molded into a predetermined shape of the horn vibration plate.
Since the thermosetting resin is of various kinds, the glass transition temperature of the thermosetting resin may be an average of the glass transition temperatures of all kinds of thermosetting resins, or may be the glass transition temperature of a specific kind of thermosetting resin.
Wherein when the glass transition temperature of the thermosetting resin is an average of the glass transition temperatures of all kinds of thermosetting resins, the preheating temperature is lower than the average of the glass transition temperatures of all kinds of thermosetting resins, and the molding temperature is higher than the average of the glass transition temperatures of all kinds of thermosetting resins. Therefore, the preheating temperature and the molding temperature can be applied to the base materials containing different types of thermosetting resin without any adjustment, and the molding time for manufacturing the loudspeaker vibrating reed containing different types of thermosetting resin is shortened, so that the manufacturing efficiency of the loudspeaker vibrating reed containing different types of thermosetting resin is improved.
Wherein, in contrast to the technical feature that "the glass transition temperature of the thermosetting resin is an average of the glass transition temperatures of all kinds of thermosetting resins", when the glass transition temperature of the thermosetting resin is the glass transition temperature of a specific kind of thermosetting resin, the preheating temperature is lower than the glass transition temperature of the specific kind of thermosetting resin, and the molding temperature is higher than the glass transition temperature of the specific kind of thermosetting resin. Therefore, the preheating temperature and the molding temperature can further shorten the molding time of the loudspeaker vibrating reed containing the specific type of thermosetting resin aiming at the base material containing the specific type of thermosetting resin, so as to improve the manufacturing efficiency of the loudspeaker vibrating reed containing the specific type of thermosetting resin.
In a preferred embodiment, the resin is a thermoplastic resin, and the preheating temperature is lower than the glass transition temperature of the thermoplastic resin. Therefore, the base material containing the thermoplastic resin can achieve the purpose of preheating and can not be converted into a viscous liquid with plasticity in the preheating step. Moreover, the molding temperature is higher than the glass transition temperature of the thermoplastic resin. Thus, in the hot press molding step, the base material containing the thermoplastic resin is preheated to a predetermined temperature, and thus can be rapidly heated to exceed the glass transition temperature thereof and appropriately softened to be converted into a viscous liquid state having a plastic deformation property, and is press-molded into a predetermined shape of the horn vibration plate.
Since the types of thermoplastic resins are many, the glass transition temperature of the thermoplastic resin may be an average of the glass transition temperatures of all types of thermoplastic resins, or may be the glass transition temperature of a specific type of thermoplastic resin.
Wherein when the glass transition temperature of the thermoplastic resin is an average of the glass transition temperatures of all kinds of thermoplastic resins, the preheating temperature is lower than the average of the glass transition temperatures of all kinds of thermoplastic resins, and the molding temperature is higher than the average of the glass transition temperatures of all kinds of thermoplastic resins. Therefore, the preheating temperature and the molding temperature can be applied to the base materials containing different types of thermoplastic resins, no adjustment is needed, the molding time for manufacturing the horn vibrating reed containing different types of thermoplastic resins is shortened, and the manufacturing efficiency of the horn vibrating reed containing different types of thermoplastic resins is improved.
Wherein, in contrast to the technical feature that "the glass transition temperature of the thermoplastic resin is an average of the glass transition temperatures of all kinds of thermoplastic resins", when the glass transition temperature of the thermoplastic resin is the glass transition temperature of a specific kind of thermoplastic resin, the preheating temperature is lower than the glass transition temperature of the specific kind of thermoplastic resin, and the molding temperature is higher than the glass transition temperature of the specific kind of thermoplastic resin. Therefore, the preheating temperature and the molding temperature can shorten the molding time of the horn vibrating reed containing the specific type of thermoplastic resin for the base material containing the specific type of thermoplastic resin, so as to improve the manufacturing efficiency of the horn vibrating reed containing the specific type of thermoplastic resin.
In a preferred embodiment, the glass transition temperature of the resin is an average of the glass transition temperatures of all kinds of resins (i.e., including thermosetting resins and thermoplastic resins), the preheating temperature is lower than the average of the glass transition temperatures of all kinds of resins, and the molding temperature is higher than the glass transition temperature of all kinds of resins. Therefore, the preheating temperature and the molding temperature can be applied to the base materials containing different types of resins, and no adjustment is needed, so that the molding time for manufacturing the loudspeaker vibrating reed containing different types of resins is shortened, and the manufacturing efficiency of the loudspeaker vibrating reed containing different types of resins is improved.
In summary, in the method for manufacturing a pre-heat-formed horn vibrating reed of the present invention, since the pre-heat temperature is lower than the glass transition temperature of the resin and the forming temperature is higher than the glass transition temperature of the resin, the base material containing the thermosetting resin and the base material containing the thermoplastic resin can be provided at the same time to shorten the time for forming the horn vibrating reed, thereby improving the manufacturing efficiency of the horn vibrating reed, and indeed improving the problems of the prior art.
The foregoing is illustrative of the preferred embodiments of the present invention and is not to be construed as limiting thereof in any way. Therefore, any modification or variation of the present invention, which is made within the spirit of the same invention, should be included in the scope of the protection of the present invention.
Claims (7)
1. A method for manufacturing a preheating-formed loudspeaker vibrating plate is characterized by comprising the following steps:
impregnation: a substrate is immersed in a resin solution, the resin solution comprises a resin, and the resin is a thermosetting resin or a thermoplastic resin;
drying: drying the base material;
preheating: preheating the substrate in an environment with a preheating temperature lower than the glass transition temperature of the resin, wherein the glass transition temperature of the resin is the average value of the glass transition temperatures of all the types of resins, and the preheating temperature is lower than the average value of the glass transition temperatures of all the types of resins;
hot-press molding: heating and pressing the substrate to form at least one horn vibration plate with a predetermined shape under an environment with a forming temperature higher than the glass transition temperature of the resin, wherein the forming temperature is higher than the average value of the glass transition temperatures of all the types of the resins; and
cutting: cutting the predetermined shape of the horn vibrating piece from the substrate to obtain a horn vibrating piece.
2. The method of claim 1, wherein when the resin is a thermosetting resin, the preheating temperature is lower than a glass transition temperature of the thermosetting resin, and the forming temperature is higher than the glass transition temperature of the thermosetting resin.
3. The method of manufacturing a pre-heat formed horn diaphragm as claimed in claim 2, wherein the glass transition temperature of the thermosetting resin is an average value of glass transition temperatures of all kinds of thermosetting resins.
4. The method of manufacturing a pre-heat formed horn diaphragm as claimed in claim 2, wherein the glass transition temperature of the thermosetting resin is the glass transition temperature of a specific kind of thermosetting resin.
5. The method of claim 1, wherein when the resin is a thermoplastic resin, the preheating temperature is lower than a glass transition temperature of the thermoplastic resin, and the forming temperature is higher than the glass transition temperature of the thermoplastic resin.
6. The method for fabricating a horn vibration reed formed by preheating as claimed in claim 5, wherein the glass transition temperature of the thermoplastic resin is an average value of glass transition temperatures of all kinds of thermoplastic resins.
7. The method for fabricating a horn vibration reed formed by preheating as claimed in claim 5, wherein the glass transition temperature of the thermoplastic resin is the glass transition temperature of a specific kind of thermoplastic resin.
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| CN107786933B true CN107786933B (en) | 2020-06-30 |
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| CN111263290A (en) * | 2018-11-30 | 2020-06-09 | 大原博 | Method for manufacturing loudspeaker vibrating reed by simultaneously utilizing different raw cloth |
| CN111866694A (en) * | 2019-04-26 | 2020-10-30 | 大原祐子 | Manufacturing method of anti-wrinkling loudspeaker vibrating piece |
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| CN1340187A (en) * | 1999-02-12 | 2002-03-13 | 通用电气公司 | Data storage medium |
| JP2010099946A (en) * | 2008-10-24 | 2010-05-06 | Toray Ind Inc | Method for manufacturing thermoplastic resin film |
| CN101815609A (en) * | 2007-07-24 | 2010-08-25 | 北川精机株式会社 | Continuous pressing machine |
| CN102349170A (en) * | 2009-03-13 | 2012-02-08 | 三井化学株式会社 | Piezoelectric polymer material, process for producing same, and piezoelectric element |
| CN103596114A (en) * | 2012-08-16 | 2014-02-19 | 大原博 | Horn elastic wave and manufacturing method thereof |
| CN104541195A (en) * | 2012-08-14 | 2015-04-22 | 三菱瓦斯化学株式会社 | Special polycarbonate polarizing eyewear |
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2016
- 2016-08-31 CN CN201610792306.4A patent/CN107786933B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1340187A (en) * | 1999-02-12 | 2002-03-13 | 通用电气公司 | Data storage medium |
| CN101815609A (en) * | 2007-07-24 | 2010-08-25 | 北川精机株式会社 | Continuous pressing machine |
| JP2010099946A (en) * | 2008-10-24 | 2010-05-06 | Toray Ind Inc | Method for manufacturing thermoplastic resin film |
| CN102349170A (en) * | 2009-03-13 | 2012-02-08 | 三井化学株式会社 | Piezoelectric polymer material, process for producing same, and piezoelectric element |
| CN104541195A (en) * | 2012-08-14 | 2015-04-22 | 三菱瓦斯化学株式会社 | Special polycarbonate polarizing eyewear |
| CN103596114A (en) * | 2012-08-16 | 2014-02-19 | 大原博 | Horn elastic wave and manufacturing method thereof |
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