US20070052136A1 - Exclusive molding method for producing cloth-based parts of loudspeaker - Google Patents
Exclusive molding method for producing cloth-based parts of loudspeaker Download PDFInfo
- Publication number
- US20070052136A1 US20070052136A1 US11/222,354 US22235405A US2007052136A1 US 20070052136 A1 US20070052136 A1 US 20070052136A1 US 22235405 A US22235405 A US 22235405A US 2007052136 A1 US2007052136 A1 US 2007052136A1
- Authority
- US
- United States
- Prior art keywords
- cloth
- molding method
- heating device
- mold set
- cloth roll
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3418—Loud speakers
Definitions
- This invention relates to an exclusive molding method for producing cloth-based parts of loudspeaker, particularly to such a method capable of raising production efficiency of cloth-based parts by altering the manufacture flowchart thereof.
- a typical structure of dynamic loudspeaker is usually composed of a power system, a piece of drum paper, and a suspension system, in which the power system further comprises a magnet, an electrode, an upper iron, a gap, and a voice coil; the drum paper is a diaphragm, which is mostly a conic or semi-spherical voice pot for moving air; and the suspension system is comprised of a damper and a suspension rim for guiding the diaphragm to move in a specific direction.
- the working principle is that an electromagnetic field perpendicular to the magnetic field created by a permanent magnet disposed on a loudspeaker is generated as soon as a current flows through the voice coil, such that a dynamic coil is forced to move in a gap reserved between the voice coil and the magnet.
- the mechanical force generated by the movement of the coil would drive the diaphragm attached on the voice coil to create vertical vibrations of sound frequencies and achieve the energy transference from electric energy to sound energy.
- nonmetallic cloth-based parts such as drum paper, damper, and even dust cover
- drum paper, damper, and even dust cover are adopted for making a loudspeaker because of the elasticity and firmness of cloth after undergoing a special treatment.
- a cloth roll is dipped first in a liquid resin, then taken out and rolled again for use.
- a cloth roll is carried by a conveyer to the position of a mold set for being depressed there between an upper half and a lower half mold of the mold set.
- Both the upper half and the lower half mold of the mold set are provided with respective heating devices such that cloth can be heated by those halve molds of the mold set concurrently which are heated by the heating devices which are heated by applying electric current when cloth is depressed, hence the damper, drum paper, etc., can be formed and cut into pieces as required.
- the mold set depresses cloth and heats it up to 200° C. for 10 seconds every time, in other words, each mold set works on cloth for at least 10 seconds, so that 6 pieces of cloth-based parts could be obtained every one minute, or 360 pieces in one hour.
- the output per hour is less than 360 pieces when conveyance time of cloth is put into consideration, and it could be even worse under a lower temperature condition desired for keeping the quality of cloth.
- a heating device C an electric heater for example
- A an upper half mold
- B a lower half mold
- the primary objective of this invention is to improve the conventional molding method for producing cloth-based parts of loudspeaker that needs a long processing time with poor production efficiency.
- Another object of this invention is to provide an improved exclusive molding method for producing cloth-based parts of loudspeaker, which uses a mold set provided with a heating device that can be maintained easily to press and heat a cloth roll simultaneously.
- the primary technical characteristic of this invention is that a resin-dipped cloth roll is first preheated then molded in same production line, so that the molding operation will not be affected by the heating process, thereby, raising the production efficiency.
- Another technical characteristic of this invention is to install the heating device and the mold set separately, so that the maintenance or replacement of the heating device can be performed more easily in comparison with the conventional method.
- a leveling device is arranged preceding the mold set, for leveling a cloth roll after passing through the heating device in order to make the cloth flush.
- the molding method of this invention is to move a resin-dipped and dried cloth roll intermittently through a heating device then a mold set, and a leveling device of rollers or the like could be interpolated therebetween if deem necessary. After a roll of cloth has being heated by the heating device and leveled by the leveling device, a flush cloth roll is molded by the mold set, then cut into pieces to obtain cloth-based parts and heighten the production efficiency thereof.
- FIG. 1 is a schematic view showing raw cloth being dipped in resin, then dried and rolled for preparation
- FIG. 2 is a schematic plane view showing cloth passing through a heating device, a leveling device, and a forming mold;
- FIG. 3 is a schematic plane view showing a heating device being arranged in both an upper half and a lower half mold of a mold set for pressing and heating cloth simultaneously.
- FIG. 2 shows the resin-dipped cloth roll 4 being moved intermittently to pass in order through a heating device 1 and a mold set 3 , in which cloth roll 4 is preheated in the heating device 1 to soften the contained resin, then carry cloth roll 4 to mold set 3 for forming and cutting to produce parts of loudspeaker, such as damper, drum paper, etc.
- loudspeaker such as damper, drum paper, etc.
- the foregoing heating device 1 could be an electro-thermal chamber or the like, and an electric heater is usually installed inside in the case of an electro-thermal chamber so that heat is generated when electric power is applied. Also an inlet and an outlet are arranged at both ends of the chamber respectively to provide a transportation channel for cloth roll 4 .
- a suitable temperature range for heating cloth-based parts is around 150° C. ⁇ 200° C., with a preferred preheating time period of 10 ⁇ 15 seconds.
- An over-high heating temperature or an overlong heating time may damage the quality of cloth; similarly, a too-low heating temperature or a too-short heating time will results in an insufficient preheat that may affect the follow-up forming operation.
- cloth roll 4 While cloth roll 4 is dragged through the heating device 1 , cloth roll 4 is heated up to get the contained resin therein to soften in order to obtain plasticity. Afterwards, it is further dragged to arrive at the position of mold set 3 , therein cloth roll 4 is clenched by an upper half 31 and lower half 32 to produce desired parts.
- cloth roll 4 has been preheated by heating device 1 in advance, hence, no heaters are required to be installed in mold set 3 , as long as the molding operation is held under room temperature. Under these conditions and compared with the conventional way, a suitable pressure is sufficient in molding process by the mold set, therefore, a longer heating time is not required in the procedure of combining two halves of the mold set together, thereby raising production efficiency considerably.
- the heating device 1 is independent of the mold set 3 , maintenance is easier and the cost thereof is relatively low.
- a short period of time is needed for the mold set 3 to process the cloth roll 4 , an intermittent manner of conveyance must be adopted to transport the cloth through the heating device 1 and the mold set 3 . At this point, since the machinery required for transportation isn't included in the range of our appeals, hence, it won't be reiterated herein.
- a leveling device 2 is interpolated between the heating device 1 and the mold set 3 , such that a cloth roll 4 can be leveled after passing through the heating device 1 and before being molded in the mold set 3 for appearance purposes.
- the leveling device 2 is composed at least of a pair of rollers 21 for pinching and leveling the cloth roll 4 in this embodiment.
Abstract
An exclusive molding method for producing cloth-based parts of loudspeaker is employed to move a resin-dipped and dried cloth roll to pass intermittently through a heating device and a mold set in order, so that the cloth roll is preheated then molded into shape of parts and cut into the desired parts with a heightened working efficiency.
Description
- 1. Field of the Invention
- This invention relates to an exclusive molding method for producing cloth-based parts of loudspeaker, particularly to such a method capable of raising production efficiency of cloth-based parts by altering the manufacture flowchart thereof.
- 2. The Prior Arts
- A typical structure of dynamic loudspeaker is usually composed of a power system, a piece of drum paper, and a suspension system, in which the power system further comprises a magnet, an electrode, an upper iron, a gap, and a voice coil; the drum paper is a diaphragm, which is mostly a conic or semi-spherical voice pot for moving air; and the suspension system is comprised of a damper and a suspension rim for guiding the diaphragm to move in a specific direction. The working principle is that an electromagnetic field perpendicular to the magnetic field created by a permanent magnet disposed on a loudspeaker is generated as soon as a current flows through the voice coil, such that a dynamic coil is forced to move in a gap reserved between the voice coil and the magnet. The mechanical force generated by the movement of the coil would drive the diaphragm attached on the voice coil to create vertical vibrations of sound frequencies and achieve the energy transference from electric energy to sound energy.
- Several nonmetallic cloth-based parts, such as drum paper, damper, and even dust cover, are adopted for making a loudspeaker because of the elasticity and firmness of cloth after undergoing a special treatment. In the special treatment, a cloth roll is dipped first in a liquid resin, then taken out and rolled again for use. During manufacture of the damper, drum paper, etc., a cloth roll is carried by a conveyer to the position of a mold set for being depressed there between an upper half and a lower half mold of the mold set. Both the upper half and the lower half mold of the mold set are provided with respective heating devices such that cloth can be heated by those halve molds of the mold set concurrently which are heated by the heating devices which are heated by applying electric current when cloth is depressed, hence the damper, drum paper, etc., can be formed and cut into pieces as required.
- The mold set depresses cloth and heats it up to 200° C. for 10 seconds every time, in other words, each mold set works on cloth for at least 10 seconds, so that 6 pieces of cloth-based parts could be obtained every one minute, or 360 pieces in one hour. Anyway, it is affirmable that the output per hour is less than 360 pieces when conveyance time of cloth is put into consideration, and it could be even worse under a lower temperature condition desired for keeping the quality of cloth.
- As shown in
FIG. 3 , since a heating device C (an electric heater for example) must be arranged in both an upper half mold (A) and a lower half mold (B) of a mold set that would bring troubles to maintenance. For instance, during the maintenance of the heating device, the mold sets must temporarily cease operation, inevitably affecting the entire production line. - The primary objective of this invention is to improve the conventional molding method for producing cloth-based parts of loudspeaker that needs a long processing time with poor production efficiency.
- Another object of this invention is to provide an improved exclusive molding method for producing cloth-based parts of loudspeaker, which uses a mold set provided with a heating device that can be maintained easily to press and heat a cloth roll simultaneously.
- The primary technical characteristic of this invention is that a resin-dipped cloth roll is first preheated then molded in same production line, so that the molding operation will not be affected by the heating process, thereby, raising the production efficiency.
- Another technical characteristic of this invention is to install the heating device and the mold set separately, so that the maintenance or replacement of the heating device can be performed more easily in comparison with the conventional method.
- Yet another technical characteristic of this invention is that a leveling device is arranged preceding the mold set, for leveling a cloth roll after passing through the heating device in order to make the cloth flush.
- The molding method of this invention is to move a resin-dipped and dried cloth roll intermittently through a heating device then a mold set, and a leveling device of rollers or the like could be interpolated therebetween if deem necessary. After a roll of cloth has being heated by the heating device and leveled by the leveling device, a flush cloth roll is molded by the mold set, then cut into pieces to obtain cloth-based parts and heighten the production efficiency thereof.
- For more detailed information regarding advantages or features of this invention, at least one example of preferred embodiment will be described below with reference to the annexed drawings.
- The related drawings in connection with the detailed description of this invention to be made later are described briefly as follows, in which:
-
FIG. 1 is a schematic view showing raw cloth being dipped in resin, then dried and rolled for preparation -
FIG. 2 is a schematic plane view showing cloth passing through a heating device, a leveling device, and a forming mold; and -
FIG. 3 is a schematic plane view showing a heating device being arranged in both an upper half and a lower half mold of a mold set for pressing and heating cloth simultaneously. - Before forming cloth-based parts of loudspeaker, dip a raw cloth roll 5 into a
liquid resin 6 as shown inFIG. 1 , in which the cloth roll 5 is dragged by a driving machine to pass through and absorb theliquid resin 6. After cloth roll 5 has absorbed liquid resin after passing through driving machine, it is then dried in a dryer to become acylindrical cloth roll 4 rich in resilience and firmness prepared for a follow-up procedure. -
FIG. 2 shows the resin-dippedcloth roll 4 being moved intermittently to pass in order through aheating device 1 and a mold set 3, in whichcloth roll 4 is preheated in theheating device 1 to soften the contained resin, then carrycloth roll 4 to mold set 3 for forming and cutting to produce parts of loudspeaker, such as damper, drum paper, etc. - The
foregoing heating device 1 could be an electro-thermal chamber or the like, and an electric heater is usually installed inside in the case of an electro-thermal chamber so that heat is generated when electric power is applied. Also an inlet and an outlet are arranged at both ends of the chamber respectively to provide a transportation channel forcloth roll 4. Generally speaking, a suitable temperature range for heating cloth-based parts is around 150° C.˜200° C., with a preferred preheating time period of 10˜15 seconds. An over-high heating temperature or an overlong heating time may damage the quality of cloth; similarly, a too-low heating temperature or a too-short heating time will results in an insufficient preheat that may affect the follow-up forming operation. Whilecloth roll 4 is dragged through theheating device 1,cloth roll 4 is heated up to get the contained resin therein to soften in order to obtain plasticity. Afterwards, it is further dragged to arrive at the position of mold set 3, thereincloth roll 4 is clenched by anupper half 31 andlower half 32 to produce desired parts. - Since
cloth roll 4 has been preheated byheating device 1 in advance, hence, no heaters are required to be installed in mold set 3, as long as the molding operation is held under room temperature. Under these conditions and compared with the conventional way, a suitable pressure is sufficient in molding process by the mold set, therefore, a longer heating time is not required in the procedure of combining two halves of the mold set together, thereby raising production efficiency considerably. Besides, as theheating device 1 is independent of the mold set 3, maintenance is easier and the cost thereof is relatively low. A short period of time is needed for the mold set 3 to process thecloth roll 4, an intermittent manner of conveyance must be adopted to transport the cloth through theheating device 1 and the mold set 3. At this point, since the machinery required for transportation isn't included in the range of our appeals, hence, it won't be reiterated herein. - A
leveling device 2 is interpolated between theheating device 1 and the mold set 3, such that acloth roll 4 can be leveled after passing through theheating device 1 and before being molded in the mold set 3 for appearance purposes. Theleveling device 2 is composed at least of a pair ofrollers 21 for pinching and leveling thecloth roll 4 in this embodiment. - Combining previously mentioned embodiment, it will not only significantly cut short the time for producing cloth parts of loudspeakers, raising production, it also help makes maintenance for mold set 3 much easier.
- The above descriptions list the preferred embodiment in detail, with reference to the drawings annexed. Modifications may be made without departing from the true nature and scope thereof, as set forth in the claims below.
Claims (6)
1. An exclusive molding method for producing cloth-based parts of loudspeaker, comprising:
(a) Providing a resin-dipped and dried cloth roll;
(b) Moving the cloth roll to pass through a heating device and a mold set intermittently in order, such that the cloth roll is preheated by the heating device then molded to show the shape of parts; and
(c) Cutting the molded cloth into pieces to obtain the desired cloth-base parts.
2. The exclusive molding method according to claim 1 , in which, after passing through the heating device, the cloth roll is leveled by a leveling device before been moved to the mold set.
3. The exclusive molding method according to claim 2 , the leveling device comprises at least of a pair of rollers for pinching and flushing the cloth roll.
4. The exclusive molding method according to claim 1 or claim 2 , in which the preheating temperature provided by the heating device is in the range of 150° C.˜200° C.
5. The exclusive molding method according to claim 1 or claim 2 , in which the preheating time is in the range of 10˜15 seconds.
6. The exclusive molding method according to claim 1 or claim 2 , in which cloth-based parts are formed by the mold set under room temperature.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/222,354 US20070052136A1 (en) | 2005-09-08 | 2005-09-08 | Exclusive molding method for producing cloth-based parts of loudspeaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/222,354 US20070052136A1 (en) | 2005-09-08 | 2005-09-08 | Exclusive molding method for producing cloth-based parts of loudspeaker |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070052136A1 true US20070052136A1 (en) | 2007-03-08 |
Family
ID=37829328
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/222,354 Abandoned US20070052136A1 (en) | 2005-09-08 | 2005-09-08 | Exclusive molding method for producing cloth-based parts of loudspeaker |
Country Status (1)
Country | Link |
---|---|
US (1) | US20070052136A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4118454A (en) * | 1975-09-02 | 1978-10-03 | Sumitomo Bakelite Company Limited | Method for producing transparent plastic molded articles |
US5198281A (en) * | 1989-04-17 | 1993-03-30 | Georgia Tech Research Corporation | Non-woven flexible multiply towpreg fabric |
US5395477A (en) * | 1993-10-20 | 1995-03-07 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Apparatus for consolidating a pre-impregnated, filament-reinforced polymeric prepreg material |
US5565162A (en) * | 1994-09-30 | 1996-10-15 | Composite Manufacturing & Research Inc. | Method for manufacturing a fiber reinforced composite article |
US5632943A (en) * | 1995-03-20 | 1997-05-27 | Lin; Po-Tsung | Method for manufacturing a diaphragm of a speaker |
-
2005
- 2005-09-08 US US11/222,354 patent/US20070052136A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4118454A (en) * | 1975-09-02 | 1978-10-03 | Sumitomo Bakelite Company Limited | Method for producing transparent plastic molded articles |
US5198281A (en) * | 1989-04-17 | 1993-03-30 | Georgia Tech Research Corporation | Non-woven flexible multiply towpreg fabric |
US5395477A (en) * | 1993-10-20 | 1995-03-07 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Apparatus for consolidating a pre-impregnated, filament-reinforced polymeric prepreg material |
US5565162A (en) * | 1994-09-30 | 1996-10-15 | Composite Manufacturing & Research Inc. | Method for manufacturing a fiber reinforced composite article |
US5632943A (en) * | 1995-03-20 | 1997-05-27 | Lin; Po-Tsung | Method for manufacturing a diaphragm of a speaker |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN102015262B (en) | Tape installation device and method for the construction of a laminate | |
JPS5923691B2 (en) | Continuous press molding method for resin sheets | |
TW200714779A (en) | Modification of nonwovens in intelligent nips | |
CN202968964U (en) | Super rapid molding device of deadening felt | |
US20070052136A1 (en) | Exclusive molding method for producing cloth-based parts of loudspeaker | |
KR101213682B1 (en) | Laminating film of polymer film and tpu for diaphragm material of audio device and thereof | |
CN103850058B (en) | A kind of supper-fast shaped device of deadening felt and application thereof | |
CN1937853B (en) | Special loudspeaker cloth-made part moulding method | |
CN205793364U (en) | Horn vibration membrane production equipment | |
CN102756396B (en) | Laser drilling method for miniature loudspeaker brackets | |
CN101690268A (en) | Method of producing diaphragm and speaker and electronic device using the diaphragm | |
TW201408604A (en) | Mould and apparatus of glass molding and method using same | |
CN107786933B (en) | Manufacturing method of preheating-formed loudspeaker vibrating piece | |
CN209562793U (en) | Vibrating diaphragm molding equipment | |
CN204097798U (en) | For the regenerator of waste paper regenerated utilization | |
CN211003867U (en) | Heating device for non-woven fabric film spraying line | |
CN108928088A (en) | The preparation method and application of foam cloth | |
CN206840513U (en) | A kind of cleaner processing mold exhaust apparatus | |
CN207156333U (en) | Produce the mould of drum-type washing machine observation window | |
CN106079874A (en) | A kind of laser holographic moulding press | |
CN105979466B (en) | Manufacturing method of vibrating diaphragm of moving-iron type receiver | |
CN202696874U (en) | Electromagnetic vibration device | |
CN204869369U (en) | Subregion sets up electric heated mold of zone of heating | |
CN203317634U (en) | Cast film edge pressing device with heating function | |
CN205818610U (en) | A kind of laminating machine hot-pressing roller |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |