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CN113858534A - Method for producing a diaphragm pot - Google Patents

Method for producing a diaphragm pot Download PDF

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Publication number
CN113858534A
CN113858534A CN202110732898.1A CN202110732898A CN113858534A CN 113858534 A CN113858534 A CN 113858534A CN 202110732898 A CN202110732898 A CN 202110732898A CN 113858534 A CN113858534 A CN 113858534A
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CN
China
Prior art keywords
membrane
color layer
mould
pot
mold
Prior art date
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Pending
Application number
CN202110732898.1A
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Chinese (zh)
Inventor
A·格拉赫
B·朔伊费勒
F·克诺伊勒
J·亨内贝格
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of CN113858534A publication Critical patent/CN113858534A/en
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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
    • H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14688—Coating articles provided with a decoration
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/06—Arranging circuit leads; Relieving strain on circuit leads
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/027—Diaphragms comprising metallic materials
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/029—Diaphragms comprising fibres
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/13—Acoustic transducers and sound field adaptation in vehicles

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

本发明涉及一种用于制造膜片罐形件(1)的方法。在此，首先将至少一个色层(15)施加到至少两件式的树脂注射成型机的第一模具上、尤其第一模具的外表面上。随后，将至少两件式的树脂注射成型机的第二模具相对于第一模具这样地布置，使得在第一模具和第二模具之间产生至少一个腔。在此，色层布置在腔内。随后，将塑料材料喷入到树脂注射成型机的腔中，使得产生具有膜片(56)的膜片罐形件(1)并且色层(15)集成到膜片罐形件(1)的外表面中。

Figure 202110732898

The present invention relates to a method for producing a membrane can (1). Here, at least one color layer ( 15 ) is first applied to the first mold of the at least two-part resin injection molding machine, in particular to the outer surface of the first mold. Subsequently, the second mold of the at least two-part resin injection molding machine is arranged relative to the first mold such that at least one cavity is created between the first mold and the second mold. Here, the color layer is arranged in the cavity. Subsequently, the plastic material is injected into the cavity of the resin injection molding machine, so that a film can (1) with a film (56) is produced and the color layer (15) is integrated into the film can (1) in the outer surface.

Figure 202110732898

Description

Method for producing a diaphragm pot
Technical Field
The invention relates to a method for producing a diaphragm pot, to a diaphragm pot and to an acoustic transducer.
Background
Document DE 102017202425 a1 describes a method in which a nickel-containing metal coating is applied at least on the outside and on the inside of the diaphragm pot in the diaphragm region. Such a metal layer is suitable as a basis for the direct application of the lacquer layer. Such a lacquer layer is usually provided when it is desired that the membrane on its outer side optically matches the vehicle colour.
Disclosure of Invention
Starting from the prior art, the object of the present invention is to develop a method for producing a diaphragm pot in which the color profile of the diaphragm pot can be achieved already during the production process.
To solve this object, a method for producing a diaphragm pot is proposed, wherein the method comprises the following method steps: at least one color layer is applied to a first mold of an at least two-part resin injection molding machine, in particular to an outer surface of the first mold, and a second mold of the at least two-part resin injection molding machine is arranged relative to the first mold in such a way that at least one cavity is created between the first mold and the second mold, wherein the color layer is arranged within the cavity, and a plastic material is injected into the cavity of the resin injection molding machine in such a way that a film pot with a film is created and the color layer is integrated into the outer surface of the film pot. A diaphragm pot produced according to the method described above is also proposed, which has at least one color layer, which is composed in particular of a gel coat, wherein the color layer is integrated into the outer surface of the diaphragm pot. Furthermore, an acoustic transducer is proposed, which has a diaphragm cup according to the invention and a transducer element, in particular a piezoelectric transducer element, and a circuit board for electrical contacting of the transducer element.
In a method for producing a film pot, at least one color layer is first applied to a first mold, in particular to the outer surface of the first mold, of an at least two-part resin injection molding machine. Preferably automatically by means of a spraying or jetting process. Preferably, in the RTM (resin transfer molding) method, a resin injection molding machine is used.
Subsequently, the second mold of the at least two-part resin injection molding machine is arranged or moved relative to the first mold in such a way that at least one cavity is created between the first mold and the second mold. The cavity is in particular a cavity formed between the first and the second mould. Here, a color layer is arranged within the cavity. In the resin injection molding method, a mold (also referred to as a casting tool) is used as a negative mold (negativeformer) of the diaphragm pot to be produced. The mold determines the geometry of the membrane pot and ensures the required surface quality of the membrane pot and the integrated color layer. In the following method step, the plastic material is injected into the cavity of the resin injection molding machine in such a way that a film pot with the film is produced and the color layer is integrated into the outer surface of the film pot. Preferably, the manufactured membrane pot also has an outer wall. The following possibilities are obtained by the described production method: the color profile of the membrane pot has been achieved during the manufacturing process. Complex process steps, such as cleaning and surface pretreatment of the diaphragm pot, preferably made of aluminum alloy, and application and drying of the lacquer layer, are therefore eliminated. The applied color layer is preferably also designed as a protective layer for the diaphragm pot, in order to prevent moisture from penetrating and UV radiation and mechanical surface damage. Preferably, a plurality of color layers are applied to the outer surface of the first mold sequentially in time. Preferably, the color layer composed of a single or a plurality of color layers has a total thickness in the range of 50 to 500 μm. In order to integrate the color layer into the outer surface of the diaphragm pot, the color layer preferably rests at least partially against the injected plastic material.
Preferably, a color layer is applied on the bottom region of the first mold. The bottom region is in particular the region of the first mold which is used to form the outer side of the membrane pot. The color layer is therefore preferably integrated into the outer surface of the membrane pot, in particular into the outer side of the membrane, when the membrane pot is constructed. Thus, the color of the membrane can be adapted to the exterior color of the vehicle, for example. The effect of the vibration damping of the coloured layer adds additional vibration damping to the vibration damping already present in the plastic material of the diaphragm pot. In the case of the use of a diaphragm pot in an acoustic transducer, the integration of a color layer into the diaphragm of the diaphragm pot leads to an advantageous change in the vibration mechanics of the transducer. In particular, an increase in the structural dynamic damping of the ultrasonic transducer occurs, which leads to an increase in the usable operating frequency range or bandwidth of the acoustic transducer.
Preferably, in a further method step, the fiber material, in particular the fiber mat, is introduced into the first mold as a film of a film pot. The fiber material is embedded in the plastic material when the plastic material is injected and is therefore also integrated into the diaphragm pot. The membrane of the membrane pot is thus constructed as a fiber plastic composite. Preferably, the fibrous material in the first mould is at least partially connected, in particular directly connected, to the colour layer. The color layer introduced into the first mold has the following advantages: the color layer is viscous and remains viscous on the side facing away from the mold. In this way, the fibrous material can be placed in the desired position in the mold in a targeted manner and can also be fixed there. Furthermore, a simple possibility is obtained for the color of the membrane to be matched externally, for example, to the outside of the vehicle color.
Preferably, the color layer consists of a gel coat, in particular a synthetic resin with color pigments. The synthetic resin is preferably composed of epoxy resin or polyester. Preferably, the color layer is thus connected to the fiber material and/or the injected plastic material in a material-locking manner. The injected plastic material is preferably a thermosetting plastic, such as epoxy or polyurethane, or alternatively a thermoplastic, such as polyamide or polyoxymethylene. The adhesive bond between the color layer and the injected plastic material and/or fiber material is achieved by the adhesive properties of the gel coat or its synthetic resin and/or the adhesive properties of the injected and subsequently thermally hardened plastic material. As a result, a non-detachable material-locking connection is produced between the outer side of the diaphragm pot and the color layer. Alternatively or additionally, a non-detachable, cohesive connection thus occurs between the outer side of the membrane pot and the fiber material, in particular the fiber mat. This material-locking connection is comparable to an adhesive connection, wherein, however, instead of an adhesive, the adhesive material properties of the injected plastic material are used for the connection. In this case, it should be noted that the adhesive properties of the gel coat and of the plastic material and/or the fiber material are matched to one another in order to achieve a permanently strong cohesive connection.
Preferably, in a further method step, the temperature of the first and/or second mold is increased for hardening the injected plastic material. This temperature increase can be achieved, for example, by heating elements integrated into the first and/or second mold. The heating time is also dependent on the injected plastic material and the quantity of injected plastic material.
A further subject matter of the invention is a membrane pot, in particular a membrane pot produced by means of the method for producing a membrane pot described above. The diaphragm pot has at least one color layer, which is in particular formed by a gel coat, which is integrated into the outer surface of the diaphragm pot. Preferably, the membrane pot has a membrane. The color layer is integrated into the outer surface of the membrane pot, in particular into the outer side of the membrane. The outer side of the membrane is in particular the side of the membrane oriented toward the environment outside the membrane pot. The diaphragm can is mounted on the vehicle, in particular in the bumper of the vehicle, on the side of the diaphragm that is visible from the outside. The diaphragm pot, which is particularly suitable for the sound transducer, is in particular designed as a fiber-plastic composite component.
Another subject of the invention is an acoustic transducer, in particular an ultrasonic transducer. The acoustic transducer has the diaphragm cup described above, a transducer element, in particular a piezoelectric transducer element, and a printed circuit board for electrical contacting of the transducer element.
Drawings
The figures show:
FIG. 1a schematically illustrates a color layer and a fiber mat on a first mold of a two-piece resin injection molding machine;
FIG. 1b schematically illustrates a color layer and a fiber mat within a cavity of a resin injection molding machine;
FIG. 2 schematically illustrates a membrane can with a color layer integrated into the membrane;
fig. 3 schematically shows an acoustic transducer;
FIG. 4 illustrates a method flow diagram for a method of manufacturing a diaphragm can.
Detailed Description
Fig. 1a shows in a sectional view: how to apply the color layer 15 by means of gel coating onto the outer surface 20 of the first mold 10 of a two-piece resin injection molding machine. The outer surface 20 is configured as a bottom region of the first mold 10. The color layer 15 is designed as a gel coat, which in turn is composed of a synthetic resin with color pigments. In addition, the fiber mat, here as fiber material 30, is directly connected to the color layer 15 on the base region of the first mold. By means of the adhesive properties of the gel coat or its synthetic resin, a cohesive connection of the color layer 15 to the fiber material 30 is produced.
Fig. 1b also shows that the second mold 25 of the two-part resin injection molding machine 5 is arranged or moved relative to the first mold 10 in such a way that a cavity 35 is created between the first mold 10 and the second mold 25. The color layer 15 and the fibre material 30 are now arranged in the cavity 35, said color layer 15 and the fibre material 30 having previously been applied to the outer surface 20 of the first mould tool 10 in the method step of fig. 1 a.
In this exemplary embodiment, the two molds 10 and 25 are joined together in a vacuum-tight manner by means of suitable sealing elements, not shown here, and form a negative mold of the film pot to be produced. In order to inject the plastic material into the cavity 35, the resin injection molding machine 5 has an inlet opening 40 and an outlet opening 45.
Fig. 2 shows the finished membrane pot 1. In this case, the color layer 15, which is formed by a gel coat, is integrated into the outer side 55 of the membrane 56 of the membrane pot 1. The color layer 15 rests in the partial region 32 against the plastic material of the membrane pot 1 and against the fiber material 30 over the entire outer surface of the fiber material 30. The fibre material 30 is itself embedded in the plastic material of the membrane pot 1. In addition to the membrane 56, the membrane pot 1 also has an outer wall 50.
Fig. 3 shows an acoustic transducer 2 with the diaphragm pot 1 shown in fig. 2. In addition to the diaphragm pot 1, the acoustic transducer 2 also has a piezoelectric transducer element 60 and a circuit board 70. For the electrical contacting of the converter element 60, the converter element 60 is connected to the circuit board 70 by means of a conductor 65.
Fig. 4 shows a method for producing a diaphragm pot in the form of a flow chart. In a first method step 100, at least one color layer is applied to a first mold of an at least two-part resin injection molding machine, in particular to an outer surface of the first mold. In particular, a color layer is applied to the bottom region of the first mold. Subsequently, in a method step 120, a second mold of the at least two-part resin injection molding machine is arranged or positioned relative to the first mold in such a way that at least one cavity is created between the first mold and the second mold. Here, a color layer is arranged within the cavity. In a method step 130 following method step 120, the plastic material is injected into the cavity of the resin injection molding machine in such a way that a film pot with the film is produced and the color layer is integrated into the outer surface of the film pot. In particular, the color layer is integrated into the outer surface of the membrane, in particular the outer side of the membrane, of the membrane pot.
In an optional method step 110 following method step 100, the fiber material, in particular the fiber mat, is introduced into the first mold as a film of a film pot. In a method step 130, the fiber material is embedded in the plastic material during the injection of the plastic material.
In an optional method step 140 following the method step 130, the temperature of the first and/or second mold is also increased for hardening the injected plastic material.

Claims (12)

1.一种用于制造膜片罐形件(1)的方法，其中，所述方法具有以下方法步骤：1. A method for producing a membrane can (1), wherein the method has the following method steps: -将至少一个色层(15)施加(100)到至少两件式的树脂注射成型机(5)的第一模具(10)上、尤其所述第一模具(10)的外表面(20)上，和- applying (100) at least one coloured layer (15) to the first mould (10) of the at least two-part resin injection moulding machine (5), in particular to the outer surface (20) of said first mould (10) on, and -将所述至少两件式的树脂注射成型机(5)的第二模具(25)相对于所述第一模具(10)布置(120)成使得在第一模具(10)和第二模具(25)之间产生至少一个腔(35)，其中，所述色层(15)布置在所述腔(35)内，和- arranging (120) the second mould (25) of the at least two-piece resin injection moulding machine (5) relative to the first mould (10) such that the first mould (10) and the second mould At least one cavity (35) is created between (25), wherein the color layer (15) is arranged in the cavity (35), and -将塑料材料喷入(130)到所述树脂注射成型机(5)的腔(35)中，使得产生具有膜片(56)的膜片罐形件(1)并且所述色层(15)被集成到所述膜片罐形件(1)的外表面中。- injecting (130) plastic material into the cavity (35) of the resin injection moulding machine (5) so that a membrane can (1) with membrane (56) is produced and the colour layer (15) ) is integrated into the outer surface of the diaphragm can (1). 2.根据权利要求1所述的方法，其特征在于，所述色层(15)至少部分地贴靠在所喷入的塑料材料中。2 . The method according to claim 1 , wherein the color layer ( 15 ) rests at least partially in the injected plastic material. 3 . 3.根据权利要求1或2所述的方法，其特征在于，所述色层(15)被施加到所述第一模具(10)的底部区域上。3. The method according to claim 1 or 2, characterized in that the coloured layer (15) is applied to the bottom area of the first mould (10). 4.根据权利要求3所述的方法，其特征在于，所述色层(15)被集成到所述膜片罐形件(1)的膜片(56)的外表面中、尤其所述膜片(56)的外侧(55)中。4 . The method according to claim 3 , wherein the color layer ( 15 ) is integrated into the outer surface of the membrane ( 56 ) of the membrane pot ( 1 ), in particular the membrane in the outer side (55) of the sheet (56). 5.根据权利要求1至4中任一项所述的方法，其特征在于，在另一方法步骤中，纤维材料(30)、尤其纤维垫作为所述膜片罐形件(1)的膜片(56)被引入(110)到所述第一模具(10)中，其中，所述纤维材料(30)在喷入(130)塑料材料时被嵌入在该塑料材料中。5 . The method according to claim 1 , wherein, in a further method step, a fiber material ( 30 ), in particular a fiber mat, serves as a membrane for the membrane can ( 1 ). 6 . A sheet (56) is introduced (110) into the first mould (10), wherein the fibre material (30) is embedded in the plastics material when injected (130). 6.根据权利要求5所述的方法，其特征在于，在所述第一模具(10)中，所述纤维材料(30)至少部分地、尤其直接与所述色层(15)连接。6. The method according to claim 5, characterized in that, in the first mould (10), the fibrous material (30) is at least partially, in particular directly, connected to the color layer (15). 7.根据权利要求1至6中任一项所述的方法，其特征在于，所述色层(15)由凝胶涂层、尤其是具有彩色颜料的合成树脂构成。7 . The method according to claim 1 , wherein the color layer ( 15 ) consists of a gel coat, in particular a synthetic resin with color pigments. 8 . 8.根据权利要求7所述的方法，其特征在于，所述色层(15)与纤维材料和/或所喷入的塑料材料材料锁合地连接。8 . The method according to claim 7 , wherein the color layer ( 15 ) is materially connected to the fiber material and/or the injected plastic material. 9 . 9.根据权利要求1至8中任一项所述的方法，其特征在于，在另一方法步骤中提高所述第一模具(10)和/或所述第二模具(25)的温度，用于硬化所喷入的塑料材料。9. The method according to any one of claims 1 to 8, characterized in that in a further method step the temperature of the first mould (10) and/or the second mould (25) is increased, For hardening the injected plastic material. 10.一种膜片罐形件、尤其借助根据权利要求1至9中任一项所述方法制造，其特征在于，所述膜片罐形件(1)具有至少一个色层(15)，该色层尤其由凝胶涂层构成，其中，所述色层(15)集成到所述膜片罐形件(1)的外表面中。10. A membrane can, in particular produced by means of the method according to any one of claims 1 to 9, characterized in that the membrane can (1) has at least one color layer (15), The color layer consists in particular of a gel coat, wherein the color layer ( 15 ) is integrated into the outer surface of the membrane pot ( 1 ). 11.根据权利要求10所述的膜片罐形件，其特征在于，所述膜片罐形件(1)具有膜片(56)，其中，所述色层(15)集成到所述膜片罐形件(1)的膜片(56)的外表面中、尤其所述膜片(56)的外侧(55)中。11. The membrane can according to claim 10, characterized in that the membrane can (1) has a membrane (56), wherein the color layer (15) is integrated into the membrane In the outer surface of the membrane ( 56 ) of the sheet can ( 1 ), in particular in the outer side ( 55 ) of said membrane ( 56 ). 12.一种声转换器，其具有：12. An acoustic transducer having: -根据权利要求10或11所述的膜片罐形件(1)，和- a membrane can (1) according to claim 10 or 11, and -转换器元件(60)、尤其压电转换器元件，和- a transducer element (60), especially a piezoelectric transducer element, and -电路板(60)，用于所述转换器元件(60)的电接触。- a circuit board (60) for electrical contacting of said converter element (60).
CN202110732898.1A 2020-06-30 2021-06-30 Method for producing a diaphragm pot Pending CN113858534A (en)

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DE102020208069.0A DE102020208069A1 (en) 2020-06-30 2020-06-30 Process for the production of a membrane pot

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DE102022206262A1 (en) 2022-06-22 2023-12-28 Robert Bosch Gesellschaft mit beschränkter Haftung Ultrasonic array sensor
IT202200025881A1 (en) 2022-12-16 2024-06-16 Ergotech Srl PROCEDURE FOR THE MANUFACTURE BY CO-MOULDING BY INJECTION OF PLASTIC MATERIAL OF A COMPONENT INTEGRATING A HYDROPHOBIC POLYMERIC MEMBRANE AND CORRESPONDING PRODUCTION ISLAND
DE102023213326A1 (en) * 2023-12-27 2025-07-03 Robert Bosch Gesellschaft mit beschränkter Haftung Manufacturing process for the production of a diaphragm cup of an ultrasonic transducer, diaphragm cup and injection molding tool

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