CN113021716A - Hydrophone vulcanization mold and hydrophone vulcanization method - Google Patents
Hydrophone vulcanization mold and hydrophone vulcanization method Download PDFInfo
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- CN113021716A CN113021716A CN202110263927.4A CN202110263927A CN113021716A CN 113021716 A CN113021716 A CN 113021716A CN 202110263927 A CN202110263927 A CN 202110263927A CN 113021716 A CN113021716 A CN 113021716A
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- hydrophone
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- cover plate
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- 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
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
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- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/10—Moulds or cores; Details thereof or accessories therefor with incorporated venting means
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- 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
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/26—Moulds or cores
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- 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
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/38—Heating or cooling
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
A hydrophone vulcanization mold and a vulcanization method of a hydrophone are disclosed, wherein the hydrophone vulcanization mold comprises a lower mold (2) and an upper mold (4), a boss part (5) and a trapezoidal gradual change section are arranged at the end, close to the upper mold (4), of a lower mold cavity (1), the upper mold is provided with an annular glue overflow groove (7), and the hydrophone vulcanization mold further comprises a sealing ring (12), a cover plate (8) and a rubber plate (9); the vulcanization comprises the following steps: connecting the hydrophone (14) with the upper die (4); pouring glue solution into the lower die cavity (1); connecting the hydrophone (14) and the upper die (4) with the lower die; one end of the hydrophone (14) is gradually inserted into the lower die cavity (1); the glue level moves upwards due to extrusion and reaches the glue accumulation groove (10) and the annular glue overflow groove (7); the upper die (4) with the hydrophone (14) is continuously installed towards the lower die (2), and the knurled screw (13) is screwed after the upper die is installed in place; pressing the cover plate (8); and taking out the vulcanized hydrophone (14).
Description
Technical Field
The invention relates to the technical field of hydrophone production, in particular to a hydrophone vulcanization mold; the invention also relates to a vulcanization method of the hydrophone.
Background
The sound pressure hydrophone is indispensable equipment in the measurement of underwater sound, is the core part in the passive sonar system. The hydrophone is a sensor for electro-acoustic conversion, when a sensitive element of the hydrophone senses an acoustic signal, the acoustic signal is converted into an electric signal, otherwise when the sensitive element is excited by the electric signal, the sensitive element generates mechanical vibration, and the mechanical vibration is transmitted outwards in a sound wave form, so that the electro-acoustic conversion is completed, and the sensor is mainly applied to underwater acoustic measurement and underwater acoustic magnitude transmission. In a low frequency range, the spherical acoustic pressure hydrophone is widely applied to sound field research because the spherical acoustic pressure hydrophone has no horizontal directivity and no directivity except for a structural barrier part in the vertical direction.
At present, a sensitive element of a hydrophone generally adopts a piezoelectric ceramic ball, and a method of vulcanizing rubber and adding a waterproof sound-transmitting layer is mostly adopted for surface treatment of the sensitive element in the manufacturing process so as to prevent corrosive liquids such as seawater and the like from corroding the hydrophone in the using process and prolong the service life. As shown in fig. 1, the hydrophone is composed of an acoustic center a, an acoustic rubber B, a support structure C, a signal cable D, and the like. Wherein the sound-transmitting rubber is a structural body which needs to be cast and vulcanized; the functional parts of the vulcanized rubber which need to be connected are as follows: the signal cable soft joint E, the watertight connection F of the signal cable and the supporting structural member, the watertight connection G of the supporting structural member and the sound center, and the watertight and sound-transmitting connection H of the sound center, wherein the supporting structural member is provided with a fabrication hole glue solution channel I. The rubber vulcanization process is complex, the main process adopted by the prior vulcanization is manual casting vulcanization, the glue solution is poured into a casting cup firstly, then the glue solution is poured into a mold cavity from the casting cup, and when the rubber vulcanization is carried out, if the design of a vulcanization mold is unreasonable and the vulcanization casting process is improper, bubbles are easily generated inside and on the surface of the rubber. These factors can reduce the sensitivity of the hydrophone and affect its frequency response range, directivity and stability, and even lead to cure failure.
Therefore, the vulcanizing mould of the hydrophone is designed, the pouring process is optimized, the pouring vulcanization is ensured not to generate bubbles, and the production quality of the hydrophone is ensured, so that the vulcanizing mould is an important work in the production of the hydrophone.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a vulcanizing mold which can effectively overcome the problem of bubbles generated in the vulcanizing process of a hydrophone.
In order to solve the technical problems, on one hand, the invention provides a hydrophone vulcanizing mold which comprises a lower mold with a lower mold cavity and an upper mold with an upper mold cavity, wherein the lower mold cavity and the upper mold cavity form a mold cavity matched with the shape of a hydrophone after mold closing, and the end, close to the upper mold, of the lower mold cavity is provided with a radially expanded boss part and a trapezoidal gradual change section; the upper die comprises an upper die and a lower die, wherein the upper die is provided with an annular groove which is butted with the lower die, the end of the upper die, which is close to the lower die, is provided with an annular glue overflow groove, the inner surface of the upper die cavity is provided with an annular sealing groove, and the upper die also comprises a sealing ring which is arranged in the annular sealing groove; the mould also comprises a cover plate which is detachably connected with the end of the upper mould far away from the lower mould, and a rubber plate which is positioned between the cover plate and the upper mould, wherein the cover plate and the rubber plate are provided with through holes for the signal cables of the hydrophones to pass through; after the die is closed, a glue accumulation groove is formed between the lower die and the inner wall of the annular groove, and an exhaust channel is formed between the lower die and the outer wall of the annular groove.
Furthermore, the hydrophone vulcanizing mould provided by the invention is also provided with at least two knurled screws which are in threaded connection with the upper mould and are used for fixing the upper mould and the lower mould together.
In order to solve the technical problem, in another aspect, the invention provides a hydrophone vulcanization method, which uses a hydrophone vulcanization mold for vulcanization, wherein the hydrophone vulcanization mold comprises a lower mold with a lower mold cavity and an upper mold with an upper mold cavity, the lower mold cavity and the upper mold cavity form a mold cavity adapted to the shape of a hydrophone after mold assembly, and the end, close to the upper mold, of the lower mold cavity is provided with a radially enlarged boss part and a trapezoidal gradual change section; the end, close to the lower die, of the upper die is provided with an annular groove butted with the lower die, the end, far away from the lower die, of the upper die is provided with an annular glue overflow groove, at least two knurled screws which are in threaded connection with the upper die and are used for fixing the upper die and the lower die together, the inner surface of the upper die cavity is provided with an annular sealing groove, and the sealing ring is arranged in the annular sealing groove; the mould also comprises a cover plate which is detachably connected with the end of the upper mould far away from the lower mould, and a rubber plate which is positioned between the cover plate and the upper mould, wherein the cover plate and the rubber plate are provided with through holes for the signal cables of the hydrophones to pass through; after the die is closed, a glue accumulation groove is formed between the lower die and the inner wall of the annular groove, and an exhaust channel is formed between the lower die and the outer wall of the annular groove; the curing of the hydrophone includes the steps of:
1) connecting the hydrophone with the upper die, and enabling a signal cable of the hydrophone to penetrate through the through holes of the rubber plate and the cover plate; connecting the screw of the cover plate with the upper die, but not tightly covering the cover plate;
2) pouring glue solution into the lower die cavity according to the calculated glue amount;
3) connecting the upper die with the hydrophone in the step 1) with the lower die with the glue solution in the step 2); one end of the hydrophone is gradually inserted into the lower die cavity, the glue solution is extruded and moved upwards, and a part of the glue solution flows into the central channel of the hydrophone through the glue solution channel;
4) loading the upper die with the hydrophone placed in the step 1) in the direction of a lower die, moving the glue solution surface upwards due to extrusion, discharging air from an exhaust channel into a glue accumulation groove, and enabling the exhaust channel not to discharge the glue solution; the glue level continues to rise from the central channel of the hydrophone, and the redundant glue solution is discharged into the annular glue overflow tank;
5) continuously installing the upper die with the hydrophone placed in the step 1) in the direction of the lower die, and screwing the knurled screw on the side edge of the upper die after the upper die is installed in place;
6) the cover plate is pressed tightly, the signal cable of the hydrophone is positioned by the rubber plate and the through hole of the cover plate, and the upper plane of the soft joint is leveled;
7) after vulcanization, the cover plate and the rubber plate are removed; and loosening the knurled screws on the side edge of the upper die, removing the upper die and the lower die, and taking out the vulcanized hydrophone.
The technical scheme provided by the invention optimizes the casting process, and ensures that no air bubbles are generated in the casting vulcanization process, thereby ensuring the production quality of the hydrophone.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic diagram of the hydrophone structure;
FIG. 2 is a schematic structural diagram of a curing mold for a hydrophone according to an embodiment;
FIG. 3 is a schematic structural diagram of a lower die of a curing die for a hydrophone according to an embodiment;
FIG. 4 is a schematic structural diagram of an upper die of a curing die for a hydrophone according to an embodiment;
FIG. 5 is a schematic cross-sectional view of FIG. 4;
FIG. 6 is a schematic illustration of an embodiment of a hydrophone as assembled;
FIG. 7 is a schematic view of an embodiment of a hydrophone as assembled with an upper die;
FIG. 8 is a schematic view of an embodiment of a hydrophone assembled with an upper die, a rubber plate, and a cover plate;
FIG. 9 is a schematic view of a lower mold according to the embodiment after a glue solution is poured;
FIG. 10 is a schematic view of an upper mold entering a lower mold during glue pouring of the embodiment;
FIG. 11 is a schematic view of the upper mold continuing to enter the lower mold while casting the glue according to the embodiment;
FIG. 12 is a schematic view of the upper mold and the lower mold assembled together during glue solution pouring according to the embodiment;
FIG. 13 is a schematic view of the embodiment after the cover plate is assembled during casting of the glue;
FIG. 14 is a schematic view of the embodiment with the rubber sheet and cover sheet removed during demolding;
FIG. 15 is a schematic view of the embodiment with the upper die removed during demolding;
FIG. 16 is a schematic view of a product after demolding according to an embodiment;
FIG. 17 is a schematic representation of a finished hydrophone of an embodiment.
Detailed Description
The invention will be further explained with reference to the drawings.
The hydrophone curing mould shown in fig. 2 to 5 comprises a lower mould 2 with a lower mould cavity 1 and an upper mould 4 with an upper mould cavity 3, wherein the lower mould cavity 1 and the upper mould cavity 3 form a mould cavity which is matched with the shape of the hydrophone after the moulds are closed. The end of the lower die cavity 1 close to the upper die 4 is provided with a boss part 5 which is radially expanded and a trapezoidal gradual change section; an annular groove 6 butted with the lower die 2 is formed in the end, close to the lower die 2, of the upper die 4, an annular glue overflow groove 7 is formed in the end, far away from the lower die 2, of the upper die 4, an annular sealing groove is formed in the inner surface of the upper die cavity 3, a sealing ring 12 is arranged in the annular sealing groove, a cover plate 8 which is detachably connected with the end, far away from the lower die 2, of the upper die 4, a rubber plate 9 is arranged between the cover plate 8 and the upper die 4, and the cover plate 8 and the rubber plate 9 are provided with through; after the die assembly, a glue accumulation groove 10 is formed between the lower die 2 and the inner wall of the annular groove 6, an exhaust channel 11 is formed between the lower die 2 and the outer wall of the annular groove 6, and the die assembly is further provided with at least two knurled screws 13 which are in threaded connection with the upper die 4 and are used for fixing the upper die 4 and the lower die 2 together.
The curing of the hydrophone includes the steps of:
1) as shown in fig. 6 to 8, the hydrophone 14 is connected to the upper die 4, and the signal cable of the hydrophone 14 is passed through the through holes of the rubber plate 9 and the cover plate 8; connecting the screws of the cover plate 8 with the upper die 4, but not tightly covering the cover plate 8;
2) as shown in fig. 9, according to the calculated glue amount, the glue solution is poured into the lower die cavity 1;
3) as shown in fig. 10 and 11, the upper die 4 with the hydrophone 14 placed in the step 1) is connected with the lower die 2 with glue liquid in the step 2); one end of the hydrophone 14 is gradually inserted into the lower die cavity 1, glue is extruded to move upwards, and a part of glue flows into a central channel of the hydrophone 14 through a glue channel;
4) as shown in fig. 10 to 12, the upper die 4 with the hydrophone 14 placed in the step 1) is loaded towards the lower die 2, the glue solution surface moves upwards due to extrusion, the glue solution moves into the glue accumulation groove 10, air is exhausted from the air exhaust channel 11, and the glue solution cannot be exhausted from the air exhaust channel 11; the glue level continues to rise from the central channel of the hydrophone 14, and the redundant glue solution is discharged into the annular glue overflow tank 7;
5) as shown in fig. 12, the upper die 4 with the hydrophone 14 placed in the step 1) is continuously installed towards the lower die 2, and after the upper die is installed in place, the knurled screw 13 on the side edge of the upper die 4 is screwed;
6) as shown in fig. 13, the cover plate 8 is pressed, the signal cable of the hydrophone 14 is positioned by the rubber plate 9 and the through hole of the cover plate 8, and the upper plane of the soft joint is leveled;
7) as shown in fig. 14 to 17, after completion of vulcanization, the cover plate 8 and the rubber plate 9 are removed; loosening the knurled screw 13 on the side edge of the upper die 4, removing the upper die 4 and the lower die 2, and taking out the vulcanized hydrophone 14.
The working principle is as follows: when pouring, the glue solution is extruded to move upwards, a part of glue solution is injected (flows) into the central channel from the glue solution channel, the glue solution surface moves upwards due to extrusion to the upper top surface of the liquid accumulation groove, and the matching surface of the upper die and the lower die can exhaust air but can not exhaust the glue solution; in the whole process, the glue solution is discharged from bottom to top, the glue accumulation groove 10 is arranged between the upper die 4 and the lower die 2, the end of the lower die cavity 1 close to the upper die 4 is provided with a trapezoidal gradual change section, so that a buffer belt for storing the gas is arranged above the glue accumulation groove 10, and the gas can be discharged from the glue solution. The glue solution surface continues to rise from the central channel, and the redundant glue overflows into the overflow groove 7; after the upper die assembly is installed in place, the knurled screws on the side edges are pressed tightly; the upper cover plate is pressed, the signal cable is positioned by the positioning hole in the center of the rubber plate, and the rubber surface of the upper plane of the cable soft joint is leveled at the same time, so that the attractiveness of a vulcanized part is guaranteed. The technical scheme provided by the invention optimizes the casting process, and ensures that no bubbles are generated during casting vulcanization, thereby ensuring the production quality of the hydrophone.
Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the claims of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A hydrophone vulcanization mold comprises a lower mold (2) with a lower mold cavity (1) and an upper mold (4) with an upper mold cavity (3), wherein the lower mold cavity (1) and the upper mold cavity (3) form a mold cavity adaptive to the shape of a hydrophone after mold assembly, and the hydrophone vulcanization mold is characterized in that a boss part (5) with a radial expansion and a trapezoidal gradual change section are arranged at the end, close to the upper mold (4), of the lower mold cavity (1); an annular groove (6) butted with the lower die (2) is formed in the end, close to the lower die (2), of the upper die (4), an annular glue overflow groove (7) is formed in the end, far away from the lower die (2), of the upper die (4), an annular sealing groove is formed in the inner surface of the upper die cavity (3), and the sealing ring (12) is arranged in the annular sealing groove; the mould is characterized by also comprising a cover plate (8) detachably connected with the end, far away from the lower mould (2), of the upper mould (4), and a rubber plate (9) positioned between the cover plate (8) and the upper mould (4), wherein the cover plate (8) and the rubber plate (9) are provided with through holes for the signal cables of the hydrophone to pass through; after the die is closed, a glue accumulation groove (10) is formed between the lower die (2) and the inner wall of the annular groove (6), and an exhaust channel (11) is formed between the lower die (2) and the outer wall of the annular groove (6).
2. Hydrophone curing mould according to claim 1, characterised by at least two knurled screws (13) in threaded connection with the upper mould (4) for fixing the upper mould (4) and the lower mould (2) together.
3. A vulcanization method of a hydrophone uses a hydrophone vulcanization mold for vulcanization, the hydrophone vulcanization mold comprises a lower mold (2) with a lower mold cavity (1) and an upper mold (4) with an upper mold cavity (3), the lower mold cavity (1) and the upper mold cavity (3) form a mold cavity adaptive to the shape of the hydrophone after mold assembly, and the hydrophone vulcanization mold is characterized in that a boss part (5) with a radial expansion and a trapezoidal gradual change section are arranged at the end, close to the upper mold (4), of the lower mold cavity (1); an annular groove (6) butted with the lower die (2) is formed in the end, close to the lower die (2), of the upper die (4), an annular glue overflow groove (7) is formed in the end, far away from the lower die (2), of the upper die (4), at least two knurled screws (13) which are in threaded connection with the upper die (4) are used for fixing the upper die (4) and the lower die (2) together, an annular sealing groove is formed in the inner surface of the upper die cavity (3), and the sealing ring (12) is arranged in the annular sealing groove; the mould is characterized by also comprising a cover plate (8) detachably connected with the end, far away from the lower mould (2), of the upper mould (4), and a rubber plate (9) positioned between the cover plate (8) and the upper mould (4), wherein the cover plate (8) and the rubber plate (9) are provided with through holes for the signal cables of the hydrophone to pass through; after the die is closed, a glue accumulation groove (10) is formed between the lower die (2) and the inner wall of the annular groove (6), and an exhaust channel (11) is formed between the lower die (2) and the outer wall of the annular groove (6); the curing of the hydrophone includes the steps of:
1) connecting the hydrophone (14) with the upper die (4), and enabling a signal cable of the hydrophone (14) to penetrate through holes of the rubber plate (9) and the cover plate (8); connecting the screw of the cover plate (8) with the upper die (4), but not tightly covering the cover plate (8);
2) according to the calculated glue amount, pouring glue solution into the lower die cavity (1);
3) connecting the upper die (4) provided with the hydrophone (14) in the step 1) with the lower die provided with the glue solution in the step 2); one end of the hydrophone (14) is gradually inserted into the lower die cavity (1), glue is squeezed and moved upwards, and a part of glue flows into a central channel of the hydrophone (14) through the glue channel;
4) the upper die (4) provided with the hydrophone (14) in the step 1) is loaded towards the lower die (2), the glue solution surface moves upwards due to extrusion, the glue solution surface moves into the glue accumulation groove (10), air is discharged from the air discharge channel (11), and the glue solution cannot be discharged from the air discharge channel (11); the glue level continues to rise from the central channel of the hydrophone (14), and the redundant glue liquid is discharged into the annular glue overflow tank (7);
5) continuously loading the upper die (4) with the hydrophone (14) placed in the step 1) to the lower die (2), and screwing a knurled screw (13) on the side edge of the upper die (4) after the upper die is mounted in place;
6) the cover plate (8) is pressed tightly, the signal cable of the hydrophone (14) is positioned by the through holes of the rubber plate (9) and the cover plate (8), and the upper plane of the soft joint is leveled;
7) after vulcanization, the cover plate (8) and the rubber plate (9) are removed; and loosening the knurled screws (13) on the side edge of the upper die (4), removing the upper die (4) and the lower die (2), and taking out the vulcanized hydrophone (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110263927.4A CN113021716B (en) | 2021-03-11 | 2021-03-11 | Hydrophone vulcanization mold and hydrophone vulcanization method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110263927.4A CN113021716B (en) | 2021-03-11 | 2021-03-11 | Hydrophone vulcanization mold and hydrophone vulcanization method |
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| CN113021716A true CN113021716A (en) | 2021-06-25 |
| CN113021716B CN113021716B (en) | 2022-08-30 |
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2021
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| CN113021716B (en) | 2022-08-30 |
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