TWI707826B - Manufacturing method of sound-absorbing particles - Google Patents
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Abstract
本發明提供一種吸音顆粒，其特徵在於：前述吸音顆粒係由混合漿料而成，且前述混合漿料係包括沸石原粉、黏結劑及有機溶劑，且前述沸石原粉、黏結劑及有機溶劑的重量比為10：1~6：89~84；其中，前述吸音顆粒的粒徑為120μm~450μm；又，前述吸音顆粒的自然振實堆積密度為0.2~0.8g/cm3。本發明還提供一種吸音顆粒的製造方法，其係包含：焙燒步驟、混合漿料製作步驟、噴霧乾燥造粒步驟及篩分步驟。藉由將本發明的吸音顆粒應用於揚聲器結構，在改善揚聲器音質表現(特別是低音表現)的同時，亦能夠防止習知吸音粉末從音箱滲入揚聲器單元的內部，進而避免吸音粉末阻礙揚聲器的作動。 The present invention provides a sound-absorbing particle, characterized in that the sound-absorbing particle is made of a mixed slurry, and the mixed slurry includes raw zeolite powder, a binder, and an organic solvent, and the raw zeolite powder, a binder, and an organic solvent The weight ratio of the sound-absorbing particles is 10:1-6:89-84; wherein the particle size of the sound-absorbing particles is 120 μm-450 μm; and the natural tapped bulk density of the sound-absorbing particles is 0.2-0.8 g/cm 3 . The present invention also provides a method for manufacturing sound-absorbing particles, which includes: a baking step, a mixed slurry preparation step, a spray drying granulation step, and a sieving step. By applying the sound-absorbing particles of the present invention to the speaker structure, while improving the sound quality of the speaker (especially bass performance), it can also prevent the conventional sound-absorbing powder from penetrating into the speaker unit from the speaker, thereby preventing the sound-absorbing powder from hindering the operation of the speaker .
Description
本發明係有關於一種吸音顆粒及其製造方法、以及應用前述吸音顆粒的揚聲器結構。 The present invention relates to a sound-absorbing particle, a manufacturing method thereof, and a speaker structure using the aforementioned sound-absorbing particle.
按，一般揚聲器，通常係於音箱之一側設置發聲單元，而該音箱之另一側則設有吸音腔。在吸音腔中，通常會填充吸音粉末作為吸音材料，來改善揚聲器作動時在音箱內部與外部所產生的壓力差。藉此，提升揚聲器的音質表現。 According to the general speaker, the sound unit is usually set on one side of the speaker, and the other side of the speaker is provided with a sound-absorbing cavity. The sound-absorbing cavity is usually filled with sound-absorbing powder as a sound-absorbing material to improve the pressure difference between the inside and outside of the speaker when the speaker is activated. In this way, the sound quality of the speaker is improved.
特別是，在體積小的微型揚聲器的封閉式音箱結構中(例如設置於筆記型電腦或手機內部的揚聲器的音箱)，填充吸音粉末對於低音的改善效果特別明顯。 Particularly, in a closed sound box structure with a small-sized micro speaker (for example, a sound box installed in a speaker in a notebook computer or a mobile phone), the effect of filling the sound-absorbing powder on the bass is particularly obvious.
然而，在封閉式音箱(於以下，亦直接將「封閉式音箱」簡稱為「音箱」)中填充吸音粉末係產生以下問題。 However, filling the sound-absorbing powder in the enclosed sound box (hereinafter also referred to as the “enclosed sound box” for short) causes the following problems.
就吸音粉末而言，通常使用沸石或活性碳等多孔性材料。因為這類的多孔性材料通常呈現細微的粉末狀，所以很容易從音箱滲入揚聲器單元的內部，進而阻礙揚聲器作動，故這類的粉末狀材料不適合直接填充至音箱內。 As for the sound-absorbing powder, porous materials such as zeolite or activated carbon are generally used. Because this kind of porous material is usually in the form of fine powder, it is easy to penetrate into the speaker unit from the speaker, thereby hindering the action of the speaker, so this kind of powdery material is not suitable for directly filling the speaker.
有鑑於此，本案發明人們發現，需要發展一種吸音顆粒作為吸音材料，相較於習知的吸音粉末，前述吸音顆粒具有較大的體積。藉由使用本發 明的吸音顆粒作為吸音材料，在改善揚聲器的音質表現的同時，亦能夠防止吸音粉末從音箱滲入揚聲器單元的內部，避免吸音粉末阻礙揚聲器的作動。 In view of this, the inventors of the present case found that it is necessary to develop a sound-absorbing particle as a sound-absorbing material. Compared with the conventional sound-absorbing powder, the aforementioned sound-absorbing particle has a larger volume. By using this Bright sound-absorbing particles are used as sound-absorbing materials to improve the sound quality of the speaker while preventing the sound-absorbing powder from infiltrating into the speaker unit from the speaker, preventing the sound-absorbing powder from hindering the operation of the speaker.
又，相較於習知吸音粉末，因為本發明的吸音顆粒較不會阻礙揚聲器作動，故較適合直接填充至揚聲器的音箱內。 Moreover, compared with the conventional sound-absorbing powder, because the sound-absorbing particles of the present invention will not hinder the action of the speaker, it is more suitable to be directly filled into the speaker cabinet.
同時，本案發明人們亦提供一種製作本發明吸音顆粒的製造方法，以及應用前述吸音顆粒的揚聲器結構，以避免吸音粉末阻礙揚聲器的作動。 At the same time, the inventors of the present case also provide a method for manufacturing the sound-absorbing particles of the present invention, and a speaker structure using the aforementioned sound-absorbing particles, so as to prevent the sound-absorbing powder from hindering the action of the speaker.
為達上述目的及其他目的，本發明係提供一種吸音顆粒，其特徵在於：前述吸音顆粒係由混合漿料而成，且前述混合漿料係包括沸石原粉、黏結劑及有機溶劑，且前述沸石原粉、黏結劑及有機溶劑的重量比為10：1~6：89~84；其中，前述吸音顆粒的粒徑為120μm~450μm；又，前述吸音顆粒的自然振實堆積密度為0.2~0.8g/cm3。 In order to achieve the above and other objectives, the present invention provides a sound-absorbing particle, which is characterized in that the sound-absorbing particle is made of a mixed slurry, and the mixed slurry includes raw zeolite powder, a binder and an organic solvent, and the aforementioned The weight ratio of zeolite powder, binder and organic solvent is 10:1~6:89~84; among them, the particle size of the aforementioned sound-absorbing particles is 120μm~450μm; and, the natural tapped bulk density of the aforementioned sound-absorbing particles is 0.2~ 0.8g/cm 3 .
在一實施例中，前述吸音顆粒的粒徑為150μm~300μm。 In one embodiment, the particle size of the aforementioned sound-absorbing particles is 150 μm to 300 μm.
在一實施例中，前述沸石原粉、黏結劑及有機溶劑的重量比為10：2~4：88~86。 In one embodiment, the weight ratio of the aforementioned raw zeolite powder, binder and organic solvent is 10:2~4:88~86.
在一實施例中，前述有機溶劑為甲苯。 In one embodiment, the aforementioned organic solvent is toluene.
在一實施例中，前述黏結劑為丁苯橡膠(SBR,styrene-butadiene rubber)。 In one embodiment, the aforementioned adhesive is styrene-butadiene rubber (SBR).
在一實施例中，前述沸石原粉的矽鋁質量比為300~600之間。 In one embodiment, the mass ratio of silicon to aluminum of the raw zeolite powder is between 300 and 600.
在一實施例中，前述沸石原粉的比表面積為250~600m2/g之間。 In one embodiment, the specific surface area of the raw zeolite powder is between 250 and 600 m 2 /g.
在一實施例中，前述沸石原粉的粒徑為10μm以下。 In one embodiment, the particle size of the raw zeolite powder is 10 μm or less.
在一實施例中，前述沸石原粉係ZSM-5型沸石粉，且其靜態水吸附量小於2重量%。 In one embodiment, the aforementioned raw zeolite powder is ZSM-5 zeolite powder, and its static water adsorption capacity is less than 2% by weight.
為達上述目的及其他目的，本發明係提供一種吸音顆粒的製造方法，其係包含：焙燒步驟，其係在300℃~600℃下，焙燒沸石原粉2~12小時；混合漿料製作步驟，其係將前述沸石原粉與黏結劑及有機溶劑，在重量比為10：1~6：89~84的條件下攪拌混合，以獲得混合漿料；噴霧乾燥造粒步驟，其係將前述混合漿料噴霧造粒及乾燥，以獲得吸音顆粒前驅物；篩分步驟，其係針對前述吸音顆粒前驅物進行篩分，以獲得粒徑為120μm~450μm、自然振實堆積密度為0.2~0.8g/cm3的吸音顆粒。 In order to achieve the above and other objectives, the present invention provides a method for producing sound-absorbing particles, which includes: a roasting step, which is to roast raw zeolite powder at 300°C to 600°C for 2 to 12 hours; and a mixed slurry preparation step , Which is to stir and mix the aforementioned zeolite powder, binder and organic solvent at a weight ratio of 10:1~6:89~84 to obtain a mixed slurry; the spray drying and granulation step is to combine the aforementioned The mixed slurry is sprayed and granulated and dried to obtain the sound-absorbing particle precursor; the sieving step is to screen the aforementioned sound-absorbing particle precursor to obtain a particle size of 120μm~450μm and a natural tapped bulk density of 0.2~0.8 g/cm 3 sound-absorbing particles.
在一實施例中，在前述噴霧乾燥造粒步驟中，使用具有內徑為2.5公尺以上的密閉腔室之離心式噴霧造粒機。 In one embodiment, in the foregoing spray drying granulation step, a centrifugal spray granulator having a closed chamber with an inner diameter of 2.5 meters or more is used.
於一實施例，在前述漿料混合步驟中，首先，黏結劑與有機溶劑混合形成油性黏結劑；接著，將油性黏結劑、沸石原粉及有機溶劑同時混合。 In one embodiment, in the foregoing slurry mixing step, first, the binder is mixed with the organic solvent to form an oily binder; then, the oily binder, the raw zeolite powder and the organic solvent are mixed simultaneously.
於一實施例，在前述漿料混合步驟中，首先，沸石原粉與有機溶劑混合形成混合液；接著，將黏結劑及有機溶劑加入前述混合液。 In one embodiment, in the foregoing slurry mixing step, first, the raw zeolite powder and the organic solvent are mixed to form a mixed solution; then, the binder and the organic solvent are added to the foregoing mixed solution.
為達上述目的及其他目的，本發明係提供一種揚聲器結構，其係包含：一扁型音箱，其包括有相連通之一非吸音區及一吸音區；一發聲單元，其設於該非吸音區；一吸音單元，其設於該吸音區，且其包括有前述吸音顆粒。 In order to achieve the above and other objectives, the present invention provides a loudspeaker structure, which includes: a flat-type speaker, which includes a non-absorption area and a sound absorption area connected; a sound unit, which is located in the non-absorption area ; A sound-absorbing unit, which is located in the sound-absorbing area, and which includes the aforementioned sound-absorbing particles.
綜上所述，本發明之吸音顆粒及應用前述吸音顆粒的揚聲器結構，係藉由其體積大的特性，能夠防止吸音粉末從音箱滲入揚聲器單元的內部，避免吸音粉末阻礙揚聲器的作動。 To sum up, the sound-absorbing particles of the present invention and the speaker structure using the aforementioned sound-absorbing particles can prevent the sound-absorbing powder from penetrating into the speaker unit from the sound box due to its large volume, and prevent the sound-absorbing powder from hindering the operation of the speaker.
又，藉由將前述吸音顆粒填充至音箱內，能夠發揮吸音效果，並實現揚聲器的低音改善。且在將前述吸音顆粒填充至揚聲器的音箱時，能夠具有較佳的填充效率。 In addition, by filling the sound-absorbing particles in the speaker, the sound-absorbing effect can be exerted and the bass of the speaker can be improved. Moreover, when the aforementioned sound-absorbing particles are filled into the sound box of the loudspeaker, it can have a better filling efficiency.
此外，前述吸音顆粒係能夠藉由本發明所揭示的製造方法來製造。 In addition, the aforementioned sound-absorbing particles can be manufactured by the manufacturing method disclosed in the present invention.
1:扁型音箱 1: Flat speaker
11:非吸音區 11: Non-sound-absorbing area
12:吸音區 12: Sound absorption area
13:灌注孔 13: perfusion hole
14:發聲孔 14: Sound hole
15:上蓋 15: Upper cover
16:下蓋 16: lower cover
2:發聲單元 2: Sound unit
3:吸音單元 3: Sound absorption unit
31:透氣層體 31: Breathable layer body
32:吸音顆粒 32: Sound-absorbing particles
33:封閉件 33: closure
[圖1]係本發明較佳具體實施例之外觀示意圖。 [Figure 1] is a schematic diagram of the appearance of a preferred embodiment of the present invention.
[圖2]係本發明較佳具體實施例之分解示意圖。 [Figure 2] is an exploded schematic diagram of a preferred embodiment of the present invention.
[圖3]係本發明較佳具體實施例之剖面狀態示意圖 [Figure 3] is a schematic cross-sectional view of a preferred embodiment of the present invention
為充分瞭解本發明之目的、特徵及功效，茲藉由下述具體之實施例，並配合所附之圖式，對本發明做一詳細說明，說明如後：首先，針對本發明一實施例的吸音顆粒進行說明。 In order to fully understand the purpose, features and effects of the present invention, the following specific embodiments are used in conjunction with the accompanying drawings to give a detailed description of the present invention. The description is as follows: First of all, for an embodiment of the present invention Sound-absorbing particles are described.
本發明一實施例的吸音顆粒的粒徑為120μm~450μm，較佳為150μm~300μm。藉由使吸音顆粒的粒徑成為此範圍，相較於習知的吸音粉末，能夠防止吸音粉末從音箱滲入揚聲器單元的內部。 The particle size of the sound-absorbing particles in an embodiment of the present invention is 120 μm to 450 μm, preferably 150 μm to 300 μm. By setting the particle size of the sound-absorbing particles in this range, compared to conventional sound-absorbing powder, it is possible to prevent the sound-absorbing powder from penetrating into the speaker unit from the sound box.
又，除了使吸音顆粒的粒徑為120μm~450μm(或150μm~300μm)之外，再藉由使前述吸音顆粒的自然振實堆積密度為0.2~0.8g/cm3，則能夠在將吸音顆粒填充至揚聲器的音箱時，增加填充效率。 Moreover, in addition to making the particle size of the sound-absorbing particles 120μm~450μm (or 150μm~300μm), by making the natural tapped bulk density of the aforementioned sound-absorbing particles 0.2-0.8g/cm 3 , the sound-absorbing particles When filling into the speakers of the speaker, increase the filling efficiency.
在一較佳實施例中，吸音顆粒係由混合漿料而成，且前述混合漿料係包括沸石原粉、黏結劑及有機溶劑。 In a preferred embodiment, the sound-absorbing particles are made of a mixed slurry, and the aforementioned mixed slurry includes raw zeolite powder, a binder, and an organic solvent.
在前述混合漿料中，沸石原粉、黏結劑及有機溶劑的重量比為10：1~6：89~84，較佳為10：2~4：88~86。藉由使混合漿料中沸石原粉、黏結 劑及有機溶劑的重量比在上述範圍內，能夠在經過噴霧乾燥造粒後，獲得粒徑為120μm~450μm、自然振實堆積密度為0.2~0.8g/cm3的吸音顆粒。 In the aforementioned mixed slurry, the weight ratio of the raw zeolite powder, the binder and the organic solvent is 10:1-6:89-84, preferably 10:2-4:88-86. By making the weight ratio of zeolite raw powder, binder and organic solvent in the mixed slurry within the above range, after spray drying and granulation, a particle size of 120μm~450μm and a natural tapped bulk density of 0.2~0.8 can be obtained. g/cm 3 sound-absorbing particles.
接著，針對前述沸石原粉、黏結劑及有機溶劑分別進行說明。 Next, the aforementioned zeolite raw powder, binder, and organic solvent will be described separately.
<沸石原粉> <Raw Zeolite Powder>
本發明一較佳實施例的沸石原粉係至少具有以下特性中的一種以上：(A)矽鋁質量比(Si/Al比)大於200；(B)粒徑小於10μm；(C)比表面積大於250m2/g；(D)自然振實堆積密度為0.2~0.8g/cm3。 The raw zeolite powder of a preferred embodiment of the present invention has at least one of the following characteristics: (A) the mass ratio of silicon to aluminum (Si/Al ratio) is greater than 200; (B) the particle size is less than 10 μm; (C) the specific surface area More than 250m 2 /g; (D) The natural tapped bulk density is 0.2~0.8g/cm 3 .
就矽鋁質量比而言，若矽鋁質量比小於200，則沸石原粉的疏水性較差。若沸石原粉的疏水性較差，則水分較容易進入沸石原粉的孔隙中，進而導致沸石原粉的孔隙被填滿，而使吸音效果變差。 In terms of the mass ratio of silicon to aluminum, if the mass ratio of silicon to aluminum is less than 200, the zeolite raw powder has poor hydrophobicity. If the raw zeolite powder has poor hydrophobicity, water will easily enter the pores of the raw zeolite powder, which will cause the pores of the raw zeolite powder to be filled and the sound absorption effect will be poor.
又，矽鋁質量比較佳係在300~600之間。若矽鋁質量比小於300，如上述般，可能會產生疏水性較差的情形，進而使吸音效果變差。若矽鋁質量比大於600，則沸石原粉的結構變差，對於吸音顆粒的剛性上可能會有不利的影響。因此，矽鋁質量比較佳係在300~600之間。 In addition, the quality of silicon-aluminum is preferably between 300 and 600. If the silicon-to-aluminum mass ratio is less than 300, as mentioned above, poor hydrophobicity may occur, and the sound absorption effect will be worse. If the silicon-aluminum mass ratio is greater than 600, the structure of the zeolite raw powder will deteriorate, which may have an adverse effect on the rigidity of the sound-absorbing particles. Therefore, the better quality of silicon aluminum is between 300 and 600.
再者，沸石原粉的粒徑係小於10μm，且較佳係小於2μm。 Furthermore, the particle size of the raw zeolite powder is less than 10 μm, and preferably less than 2 μm.
再者，若沸石原粉的比表面積小於250m2/g，則因為沸石原粉的吸附位置較少，而導致吸音效果變差。 Furthermore, if the specific surface area of the raw zeolite powder is less than 250 m 2 /g, there are fewer adsorption sites for the raw zeolite powder, resulting in poor sound absorption effect.
又，比表面積較佳係在300~600m2/g之間。若比表面積小於300m2/g，如上述般，可能會因為沸石原粉的吸附位置較少，進而使吸音效果變差。若比表面積大於600m2/g，則沸石原粉變得容易吸附水分或其他雜質，進而影響吸音效果。因此，比表面積較佳係在300~600m2/g之間。 In addition, the specific surface area is preferably between 300 and 600 m 2 /g. If the specific surface area is less than 300m 2 /g, as described above, the original zeolite powder may have fewer adsorption sites, which may worsen the sound absorption effect. If the specific surface area is greater than 600 m 2 /g, the raw zeolite powder becomes easy to adsorb moisture or other impurities, which in turn affects the sound absorption effect. Therefore, the specific surface area is preferably between 300 and 600 m 2 /g.
再者，若沸石原粉的自然振實堆積密度在0.2~0.8g/cm3的範圍內，有助於獲得自然振實堆積密度在0.2~0.8g/cm3的範圍內的吸音顆粒。 Furthermore, if the natural tapped bulk density of the zeolite raw powder is in the range of 0.2 to 0.8 g/cm 3 , it is helpful to obtain sound-absorbing particles with the natural tapped bulk density in the range of 0.2 to 0.8 g/cm 3 .
接著，就沸石原粉的來源而言，較佳係MFI型的沸石，更佳係ZSM-5型的沸石，最佳係ZSM-5型多孔性高矽沸石。 Next, in terms of the source of the raw zeolite powder, MFI zeolite is preferred, ZSM-5 zeolite is more preferred, and ZSM-5 porous high silica zeolite is most preferred.
此外，前述沸石原粉的靜態水吸附量較佳係小於2%，更佳係小於1%。若靜態水吸附量(mg/g,%)大於2%，則沸石原粉變得容易吸附水分，且水分較容易進入沸石原粉的孔隙中，進而導致沸石原粉的孔隙被填滿，而使吸音效果變差。 In addition, the static water adsorption capacity of the raw zeolite powder is preferably less than 2%, more preferably less than 1%. If the static water adsorption capacity (mg/g,%) is greater than 2%, the raw zeolite powder becomes easy to absorb moisture, and the moisture easily enters the pores of the raw zeolite powder, which will cause the pores of the raw zeolite powder to be filled. Make the sound absorption effect worse.
就沸石原粉的最佳具體例而言，前述沸石原粉係例如來自ZSM-5型多孔性高矽沸石，且前述沸石原粉的矽鋁質量比為300~400、比表面積為300~450m2/g、粉末粒徑小於1μm、靜態水吸附量小於1%。 Regarding the best specific example of the raw zeolite powder, the raw zeolite powder is, for example, from ZSM-5 porous high silica zeolite, and the raw zeolite powder has a silica-alumina mass ratio of 300 to 400 and a specific surface area of 300 to 450 m 2 /g, powder particle size is less than 1μm, static water adsorption is less than 1%.
<黏結劑> <Binder>
本發明一較佳實施例中的黏結劑為合成橡膠，例如順丁橡膠、丁苯橡膠、氯丁橡膠、丁腈橡膠等。此等當中，較佳係丁苯橡膠(SBR,Styrene Butadiene rubber)。 The adhesive in a preferred embodiment of the present invention is synthetic rubber, such as butadiene rubber, styrene butadiene rubber, neoprene rubber, nitrile butadiene rubber, and the like. Among these, Styrene Butadiene rubber (SBR) is preferred.
<有機溶劑> <Organic Solvent>
有機溶劑只要能夠適當地溶解沸石原粉及黏結劑即可，並未特別限制。適當的有機溶劑可舉出甲苯、苯酚、無水乙醇、丙酮等。此等當中，就容易溶解前述黏結劑(特別是丁苯橡膠)的觀點來看，有機溶劑較佳係選自甲苯。 The organic solvent is not particularly limited as long as it can appropriately dissolve the zeolite raw powder and the binder. Suitable organic solvents include toluene, phenol, absolute ethanol, acetone and the like. Among them, the organic solvent is preferably selected from toluene from the viewpoint of easily dissolving the aforementioned binder (especially styrene butadiene rubber).
接著，針對前述吸音顆粒的製造方法進行說明。 Next, the manufacturing method of the aforementioned sound-absorbing particles will be described.
在一較佳的實施例中，吸音顆粒的製造方法係至少包含：焙燒步驟、混合漿料製作步驟、噴霧乾燥造粒步驟及篩分步驟。在一更佳的實施例中，吸音顆粒的製造方法還可包含烘乾步驟。以下針對各個步驟進行說明。 In a preferred embodiment, the method for manufacturing sound-absorbing particles at least includes a roasting step, a mixed slurry preparation step, a spray drying granulation step, and a sieving step. In a more preferred embodiment, the manufacturing method of sound-absorbing particles may further include a drying step. The following describes each step.
<焙燒步驟> <Roasting Step>
就焙燒步驟的溫度及時間而言，並未特別限制，在不損壞沸石原粉結構的前提下，能夠去除沸石原粉中的模板劑即可。就焙燒步驟的溫度及時間而言，較佳係300℃~600℃、2~12小時。藉由焙燒步驟，能夠去除沸石原粉中的模板劑，以確保沸石原粉中孔道的暢通，以提升經後續步驟所製成之吸音顆粒的吸音效果。 The temperature and time of the calcination step are not particularly limited, and the template agent in the raw zeolite powder can be removed without damaging the structure of the raw zeolite powder. As for the temperature and time of the firing step, it is preferably 300°C to 600°C for 2 to 12 hours. Through the roasting step, the template agent in the raw zeolite powder can be removed to ensure the smoothness of the pores in the raw zeolite powder, so as to improve the sound-absorbing effect of the sound-absorbing particles produced by the subsequent steps.
<混合漿料製作步驟> <Mixed slurry production steps>
混合漿料製作步驟係藉由攪拌，將經過前述焙燒步驟的沸石原粉、黏結劑及有機溶劑形成混合漿料。在一較佳的實施例中，混合漿料製作步驟係可包含以下子步驟：A步驟，將黏結劑與有機溶劑混合，以形成油性黏結劑；B步驟，將油性黏結劑、經過前述焙燒步驟的沸石原粉及有機溶劑同時混合，並在確保各成分互溶良好的前提下，完成混合漿料製作。 The preparation step of the mixed slurry is to form a mixed slurry by stirring the raw zeolite powder, the binder and the organic solvent that have passed through the aforementioned calcination step. In a preferred embodiment, the step of preparing the mixed slurry may include the following sub-steps: step A, mixing the binder with an organic solvent to form an oily binder; step B, passing the oily binder through the aforementioned baking step The raw zeolite powder and the organic solvent are mixed at the same time, and the preparation of the mixed slurry is completed under the premise of ensuring that the components are mutually miscible.
在一變形例中，混合漿料製作步驟係可包含以下子步驟：A’步驟，將經過前述焙燒步驟的沸石原粉與有機溶劑混合，以形成混合液；B’步驟，將黏結劑加入前述混合液，且在此加入過程中，能夠依需持續加入有機溶劑，確認沸石原粉及黏結劑皆均勻地分散於有機溶劑中。並在確保各成分互溶良好的前提下，完成混合漿料製作。 In a variant, the step of preparing the mixed slurry may include the following sub-steps: Step A', mixing the raw zeolite powder that has undergone the aforementioned calcination step with an organic solvent to form a mixed solution; Step B', adding the binder to the aforementioned The mixed liquid, and during the adding process, the organic solvent can be continuously added as needed to confirm that the zeolite powder and the binder are uniformly dispersed in the organic solvent. And under the premise of ensuring that the ingredients are mutually soluble, the production of the mixed slurry is completed.
此處應特別說明的是，不論混合漿料製作步驟係採用上述A、B步驟或是上述A’、B’步驟，在混合漿料中，沸石原粉、黏結劑及有機溶劑的重量比皆在10：1~6：89~84的範圍內。 It should be particularly noted here that regardless of whether the steps A and B are used in the preparation of the mixed slurry or the steps A'and B'are used, the weight ratio of the raw zeolite powder, the binder and the organic solvent in the mixed slurry is all In the range of 10:1~6:89~84.
<噴霧乾燥造粒步驟> <Spray drying granulation step>
噴霧乾燥造粒步驟係將在前述混合漿料製作步驟中所獲得之混合漿料噴霧造粒及乾燥(烘乾)，以獲得吸音顆粒前驅物。又，在前述噴霧乾燥造粒步驟中，能夠選用使用壓力噴嘴(Pressure Nozzle)或轉盤(Rotary Disc)的噴霧乾燥造 粒法。前者係藉由壓力噴嘴由上往下地將前述混合漿料霧化，後者則主要利用離心力原理，由上往下地控制轉盤的轉速，來將前述混合漿料霧化。 The spray drying granulation step is to spray granulate and dry (dry) the mixed slurry obtained in the aforementioned mixed slurry preparation step to obtain the sound-absorbing particle precursor. In addition, in the aforementioned spray drying granulation step, a spray drying method using a pressure nozzle (Pressure Nozzle) or a rotary disc (Rotary Disc) can be selected. Granule method. The former uses a pressure nozzle to atomize the mixed slurry from top to bottom, and the latter mainly uses the principle of centrifugal force to control the rotation speed of the turntable from top to bottom to atomize the mixed slurry.
又，因為前述吸音顆粒的製造方法係使用有機溶劑，故較佳係使用具有密閉腔室的噴霧乾燥造粒機。藉此，避免有機溶劑中的成分***產生危險，並能夠確保有機溶劑可以高度回收，不造成污染。 In addition, since the above-mentioned method for producing sound-absorbing particles uses an organic solvent, it is preferable to use a spray-drying granulator having a closed chamber. Thereby, the danger of explosion of the components in the organic solvent is avoided, and the organic solvent can be highly recycled without causing pollution.
在一較佳實施例中，前述噴霧乾燥造粒步驟係利用離心力的噴霧乾燥造粒法，其係使用具有內徑為2.5公尺以上的密閉腔室之離心式噴霧造粒機。 In a preferred embodiment, the aforementioned spray drying granulation step is a spray drying granulation method using centrifugal force, which uses a centrifugal spray granulator with a closed chamber with an inner diameter of 2.5 meters or more.
<篩分步驟> <Screening Step>
篩分步驟係使用篩分機，針對在前述噴霧乾燥造粒步驟所獲得之吸音顆粒前驅物進行篩分，以獲得粒徑為120μm~450μm、自然振實堆積密度為0.2~0.8g/cm3的吸音顆粒。 The screening step is to use a screening machine to screen the sound-absorbing particle precursor obtained in the spray drying granulation step to obtain a particle size of 120μm~450μm and a natural tapped bulk density of 0.2~0.8g/cm 3 Sound-absorbing particles.
<烘乾步驟> <drying steps>
針對在前述篩分步驟所獲得之吸音顆粒，還可進行烘乾步驟。藉由烘乾步驟能夠進一步地去除水份。在烘乾步驟後，亦可將吸音顆粒靜置後一段時間後再行使用。 For the sound-absorbing particles obtained in the aforementioned sieving step, a drying step can also be performed. The drying step can further remove water. After the drying step, the sound-absorbing particles can also be used after a period of time.
經由上述吸音顆粒的製造方法，能夠獲得特別適用於微型揚聲器之封閉式音箱的吸音顆粒。 Through the above-mentioned manufacturing method of sound-absorbing particles, sound-absorbing particles particularly suitable for closed sound boxes of micro speakers can be obtained.
接著，以下針對本發明一較佳實施例的揚聲器結構進行說明。 Next, the speaker structure of a preferred embodiment of the present invention will be described below.
首先，請參考圖1至圖3，如圖所示，一較佳實施例的揚聲器結構係包含：一扁型音箱1、一發聲單元2以及一吸音單元3。
First, please refer to FIGS. 1 to 3. As shown in the figures, the speaker structure of a preferred embodiment includes: a flat-type speaker 1, a
該扁型音箱1包括有相連通之一非吸音區11及一吸音區12，該扁型音箱1之窄面側係設有連通該吸音區12之二灌注孔13，且該扁型音箱1之寬面側係具有連通該非吸音區11之一發聲孔14。於本發明之較佳具體實施例中，該
扁型音箱1係由一上蓋15及一下蓋16所組成，該非吸音區11、該吸音區12與該等灌注孔13係設於該下蓋16，該發聲孔14係設於該上蓋15。
The flat sound box 1 includes a non-sound-absorbing
該發聲單元2設於該非吸音區11且連接該發聲孔14。
The sounding
該吸音單元3設於該吸音區12，該吸音單元3係包括有一透氣層體31、吸音顆粒32及二封閉件33，該透氣層體31係設於該吸音區12以形成一吸音腔，吸音顆粒32係由該等灌注孔13設於該吸音區12之吸音腔，該等封閉件33係分別封閉該等灌注孔13。
The sound-absorbing
又，在一變形例中，灌注孔並非設置於該扁型音箱1之窄面側，而是設置於吸音區12之吸音腔的頂面或底面(未圖示)。 Moreover, in a modified example, the filling hole is not provided on the narrow surface side of the flat sound box 1, but on the top or bottom surface of the sound-absorbing cavity of the sound-absorbing area 12 (not shown).
[實施例] [Example]
<吸音顆粒的製造> <Production of sound-absorbing particles>
首先，使用ZSM-5型多孔性高矽沸石粉末(矽鋁質量比為300~400、比表面積為300~450m2/g、粉末粒徑小於1μm、靜態水吸附量小於1%)作為沸石原粉。 First, use ZSM-5 porous high silica zeolite powder (silica-aluminum mass ratio of 300 to 400, specific surface area of 300 to 450 m 2 /g, powder particle size less than 1 μm, static water adsorption less than 1%) as the original zeolite powder.
接著，將市售之SBR與高濃度甲苯(99wt%)混合，形成油性黏結劑。再將經過前述焙燒步驟的沸石原粉與有機溶劑同時混合，並在確保各成分互溶良好的前提下，完成混合漿料製作。混合漿料中，沸石原粉、黏結劑及有機溶劑的重量比為10：5：85。 Then, the commercially available SBR is mixed with high-concentration toluene (99wt%) to form an oily binder. Then, the raw zeolite powder and the organic solvent that have undergone the aforementioned calcination step are simultaneously mixed, and the preparation of the mixed slurry is completed on the premise of ensuring that the components are mutually miscible. In the mixed slurry, the weight ratio of zeolite powder, binder and organic solvent is 10:5:85.
再者，使用內徑為2.5公尺以上的密閉腔室之離心式噴霧造粒機，獲得吸音顆粒前驅物。 Furthermore, a centrifugal spray granulator with a closed chamber with an inner diameter of 2.5 meters or more was used to obtain the sound-absorbing particle precursor.
最後，使用篩分機，篩分出粒徑為150μm~300μm的吸音顆粒。此外，吸音顆粒的自然振實堆積密度為0.25~0.55g/cm3。 Finally, use a sieving machine to screen out sound-absorbing particles with a particle size of 150 μm to 300 μm. In addition, the natural tapped bulk density of sound-absorbing particles is 0.25 to 0.55 g/cm 3 .
<揚聲器結構的組裝> <Assembly of speaker structure>
首先，將該發聲單元2設於該非吸音區11，並將該透氣層體31設於該吸音區12以形成該吸音腔，之後再將該上蓋15與該下蓋16加以結合，進而使該扁型音箱1先行結合該發聲單元2與該透氣層體31。
First, the
接著，再將經前述吸音顆粒的製造方法所獲得的吸音顆粒32，從其中一個灌注孔13藉由重力使吸音顆粒32快速灌注(填充)至該吸音區12之吸音腔。之後再由另一孔灌注13灌注前述吸音顆粒32，使吸音顆粒32得以填滿該吸音區12之吸音腔，最後再以該等封閉件33分別封閉該等灌注孔13。如此，便可完成具有本發明吸音顆粒32的揚聲器結構。
Then, the sound-absorbing
當完成上述組裝後，該扁型音箱1之上蓋15與下蓋16會構成一封閉式之空間，且該吸音區12藉由該透氣層體31與非吸音區11進行氣體流通，故可使該發聲單元2作動時產生之氣體得以進入該吸音區12之吸音顆粒32中，進而藉由吸音顆粒32達到較佳之吸音效果，以進一步提升該發聲單元2之低頻表現。
After the above assembly is completed, the
就提升低頻表現的特點而言，舉例來說，在容積為2c.c.的封閉式音箱內，微型揚聲器的最低共振頻率(Fo)為1000Hz。在音箱填充本發明的吸音顆粒至2/3滿後，其最低共振頻率(Fo)降至800Hz。由此可知，藉由將本發明的吸音顆粒填充至音箱內，能夠發揮吸音效果，並實現揚聲器的低音改善。 In terms of improving low-frequency performance, for example, in a closed speaker with a volume of 2c.c., the lowest resonance frequency (Fo) of the micro speaker is 1000 Hz. After the sound box is filled with the sound-absorbing particles of the present invention to 2/3 full, its lowest resonance frequency (Fo) drops to 800 Hz. It can be seen from this that by filling the sound absorbing particles of the present invention into a speaker, the sound absorption effect can be exerted and the bass of the speaker can be improved.
又，在長時間使用揚聲器結構後，並未發現吸音顆粒(吸音材料)從音箱滲入揚聲器單元的內部並阻礙揚聲器作動的情形。 In addition, after using the speaker structure for a long time, no sound-absorbing particles (sound-absorbing material) penetrated into the speaker unit from the sound box and hindered the operation of the speaker.
又，相較於設置於吸音腔的頂面或底面之灌注孔，設置於扁型音箱之窄面側的灌注孔更能夠提升吸音顆粒的填充效率。 In addition, compared to the filling holes provided on the top or bottom surface of the sound-absorbing cavity, the filling holes provided on the narrow side of the flat sound box can improve the filling efficiency of the sound-absorbing particles.
綜上所述，藉由使用本發明的吸音顆粒作為吸音材料，在改善揚聲器的音質表現(特別是低音表現)的同時，亦能夠防止吸音粉末從音箱滲入揚聲器單元的內部，避免吸音粉末阻礙揚聲器的作動。 In summary, by using the sound-absorbing particles of the present invention as a sound-absorbing material, while improving the sound quality of the speaker (especially bass performance), it can also prevent the sound-absorbing powder from penetrating into the speaker unit from the speaker, and avoid the sound-absorbing powder from obstructing the speaker. Action.
本發明在上文中已以較佳實施例揭露，然熟習本項技術者應理解的是，該實施例僅用於描繪本發明，而不應解讀為限制本發明之範圍。應注意的是，舉凡與該實施例等效之變化與置換，均應設為涵蓋於本發明之範疇內。因此，本發明之保護範圍當以申請專利範圍所界定者為準。 The present invention has been disclosed in a preferred embodiment above, but those skilled in the art should understand that the embodiment is only used to describe the present invention and should not be construed as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to this embodiment should be included in the scope of the present invention. Therefore, the protection scope of the present invention should be defined by the scope of the patent application.
11:非吸音區 11: Non-sound-absorbing area
12:吸音區 12: Sound absorption area
13:灌注孔 13: perfusion hole
14:發聲孔 14: Sound hole
15:上蓋 15: Upper cover
16:下蓋 16: lower cover
2:發聲單元 2: Sound unit
3:吸音單元 3: Sound absorption unit
31:透氣層體 31: Breathable layer body
32:吸音顆粒 32: Sound-absorbing particles
33:封閉件 33: closure
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| CN105049997A (en) * | 2010-08-23 | 2015-11-11 | 楼氏电子亚洲有限公司 | Loudspeaker System with Improved Sound |
| CN104994461A (en) * | 2015-07-03 | 2015-10-21 | 歌尔声学股份有限公司 | Sound-absorbing material, sound-absorbing particles, loudspeaker module production process and particles and module |
| CN107216637A (en) * | 2017-06-29 | 2017-09-29 | 苏州夸克新材料科技有限公司 | A kind of preparation method of loudspeaker zeolite sound-absorbing material |
| CN107500604A (en) * | 2017-09-21 | 2017-12-22 | 苏州夸克新材料科技有限公司 | A kind of follow-on sound-absorbing material |
| CN109133093A (en) * | 2018-07-28 | 2019-01-04 | 瑞声科技（南京）有限公司 | A kind of sound-absorbing material and the loudspeaker using the sound-absorbing material |
| CN109437222A (en) * | 2018-11-26 | 2019-03-08 | 上海绿强新材料有限公司 | A kind of molecular sieve microsphere sound-absorbing material and preparation method thereof |
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| TW202037560A (en) | 2020-10-16 |
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