Acoustic array infiltration forming vulcanization mold and forming method thereof

Abstract

The invention discloses an acoustic array infiltration forming vulcanization mold and a forming method thereof.The vulcanization mold comprises a mold cavity plate, a connecting plate, a fixing piece and at least two sets of split bolts, the mold cavity plate is provided with a compression molding cavity, and a material injection opening is formed in the top of the compression molding cavity; and the acoustic array fairing, the model plate and the connecting plate are assembled through two groups of split bolts and fixing pieces, so that a cavity to be infiltrated is formed between the acoustic array fairing and the compression molding cavity and is used for filling a glue solution. According to the invention, the discharge chute is designed at the injection port to store excessive glue solution, and the vulcanized shell is prepared by adopting an infiltration molding method, so that the defect that a pouring port trace is remained in the conventional pouring process can be eliminated; and meanwhile, a press machine adopted by extrusion forming in the past is changed into a tensioning structure, so that the tensioning allowance of the split bolt can be ensured during the glue solution injection period, the glue solution is prevented from being excessively extruded or not extruded in place in the infiltration forming process, and the overall performance of the product is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of sound array vulcanization, in particular to a sound array infiltration molding vulcanization mold and a molding method thereof. Background Art

[0002] The curing line shape and surface roughness of the acoustic array's shroud directly affect the product's underwater flow noise. The curing of the acoustic array has evolved from the previous process of vulcanized rubber blocks and shells being polished and adhered to the surface of the array element to CPU casting molding. Among them, the advantage of casting molding is that the product is subjected to little pressure and is only subject to the dead weight of the glue; but there are the following defects:

[0003] After casting, there is a pouring gate on the surface of the product. After cleaning, there are obvious traces of the pouring gate, and the local surface roughness of the pouring gate is high. Summary of the invention

[0004] In view of this, an object of the present invention is to provide an acoustic array infiltration molding vulcanization mold and a molding method thereof to solve the technical problems mentioned in the prior art.

[0005] A sound array infiltration molding vulcanization mold, the vulcanization mold comprising:

[0006] A mold cavity plate, comprising a compression molding cavity, wherein a material injection port is provided at the top of the compression molding cavity;

[0007] A connecting plate is arranged above the injection port, and a plurality of positioning holes are arranged at one end of the connecting plate close to the mold cavity plate. The positioning holes are used to mount one end of the acoustic array flow guide cover to the bottom of the connecting plate through a fixing piece, so that the other end of the acoustic array flow guide cover is extended into the compression molding cavity, and a cavity to be infiltrated is formed between the acoustic array flow guide cover and the compression molding cavity, and the cavity to be infiltrated is used to fill the glue liquid;

[0008] At least two groups of tension bolts are respectively arranged between the mold cavity plate and the connecting plate, and both ends of the tension bolts pass through the mold cavity plate and the connecting plate respectively and are provided with locking nuts for adjusting the thickness of the cavity to be infiltrated.

[0009] Optionally, a discharge groove connected to the injection port is provided on the top of the cavity plate, and the bottom of the discharge groove is at least 5 mm higher than the top of the cavity to be infiltrated.

[0010] Optionally, a through groove penetrating the outer circumference of the cavity plate is provided on one side of the discharge chute.

[0011] Optionally, positioning platforms are respectively provided at both ends of the tension bolt, and the two positioning platforms are in contact with the opposite surfaces of the connecting plate and the cavity plate respectively;

[0012] A threaded connection part is respectively provided at one end of the two positioning platforms which is away from each other. The threaded connection part passes through the connecting plate or the cavity plate and is connected with the locking nut.

[0013] Optionally, a support platform is provided at the bottom of the cavity plate, and the support platform is equipped with a plurality of pads, one side of the pad has a support surface that fits the bottom edge of the support platform, and the pad is used to tilt and lift one side of the cavity plate upward by 10-30°.

[0014] Optionally, a plurality of assembly holes are provided on the periphery of the cavity plate and / or the connecting plate;

[0015] Each of the assembly holes is provided with a handle, and the handle comprises:

[0016] A connecting portion, detachably mounted in the assembly hole;

[0017] The hand-held part is arranged outside the assembly hole and connected to the connecting part.

[0018] Optionally, an observation port is provided in the middle of the connecting plate, and the plurality of positioning holes are evenly distributed around the observation port.

[0019] Optionally, the fixing member is a fixing screw or a fixing bolt, and the fixing screw or the fixing bolt passes through the positioning hole and is connected to a prefabricated hole of the acoustic array air guide cover;

[0020] The number and positions of the positioning holes and the prefabricated holes of the acoustic array fairing are respectively arranged in one-to-one correspondence.

[0021] A method for forming an acoustic array by infiltration forming, the method is applied to the vulcanization mold described above, and the method comprises the following steps:

[0022] S1, respectively assembling the cavity plate, the connecting plate, the tension bolts, the fixing parts and the acoustic array air guide cover, so that the acoustic array air guide cover and the cavity plate are molded together to form a cavity to be infiltrated, and the cavity to be infiltrated has a matching gap;

[0023] S2, injecting glue into the cavity to be infiltrated through the injection port and letting it stand for 5-20 minutes;

[0024] S3, pressing the acoustic array guide cover into the compression molding cavity by tension bolts to adjust the thickness of the cavity to be infiltrated to a preset thickness, and squeezing out excess glue;

[0025] S4, placing the mold filled with glue in an oven and heating at 40-60°C for 12-72h;

[0026] S5. Demolding to form a vulcanized shell on the periphery of the acoustic array fairing.

[0027] Optionally, the glue solution is injected as follows:

[0028] Tilt the cavity to be infiltrated by 10-30 degrees, inject glue until the glue overflows the bottom of the cavity to be infiltrated, and stop injecting glue;

[0029] The cavity to be infiltrated is placed vertically, and the glue solution is continuously injected until the cavity to be infiltrated is completely filled with the glue solution.

[0030] The beneficial effects that the present invention can produce include:

[0031] The present invention provides an acoustic array infiltration molding vulcanization mold and a molding method thereof. By designing a discharge trough at the injection port to store excess glue, the infiltration molding method is used to prepare a vulcanized shell, which can eliminate the defect of the previous casting process that there are traces of the pouring port. At the same time, since the parts in the acoustic array are pressure-sensitive components, they cannot withstand the high temperature (150°C) and high pressure (8-9MPa) used in the press molding. Therefore, the press used in the previous extrusion molding is changed to a tensioning structure, so that during the injection of glue, it can ensure that there is a tension margin for the tension bolts, so that the waiting The infiltration cavity has a certain matching gap to fill the excess glue, so that the glue reacts in the cavity to be infiltrated for a period of time and becomes viscous, and then the tension bolts are fixed between the cavity plate and the connecting plate through the locking nut to eliminate the tension margin, and the acoustic array guide cover is driven to extend into the cavity plate to achieve complete mold closing action, and the excess glue is squeezed out of the cavity to be infiltrated, thereby preventing the glue from being excessively squeezed during the infiltration molding process, resulting in the inability to demold, or the inadequate squeezing leads to excessive gaps in the fitting parts, resulting in a sudden change in the overall linear shape of the product, thereby ensuring the overall performance of the product. The vulcanization mold has a simple structure and is easy to use, and can eliminate the previous gate defects and improve the molding quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a sound array infiltration molding vulcanization mold of the present invention;

[0033] Figure 2 For the present invention Figure 1 A schematic diagram of the structure of the cavity plate;

[0034] Figure 3 For the present invention Figure 1 A schematic diagram of the structure of the connecting plate;

[0035] Figure 4 For the present invention Figure 1 A schematic diagram of the structure of the cushion block;

[0036] In the figure: 1. cavity plate, 2. compression molding cavity, 3. injection port, 4. connecting plate, 5. positioning hole, 6. fixing part, 7. sound array fairing, 8. cavity to be wetted, 9. tension bolts, 10. locking nut, 11. discharge trough, 12. through slot, 13. positioning platform, 14. observation port, 15. support platform, 16. cushion block, 17. support surface, 18. assembly hole, 19. connecting part, 20. hand-held part. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figure 1-Figure 4As shown, the present invention provides a sound array infiltration molding vulcanization mold, the vulcanization mold includes a cavity plate 1 (lower mold), a connecting plate 4 and at least two groups of tension bolts 9, the cavity plate 1 has a compression molding cavity 2, and the top of the compression molding cavity 2 is provided with an injection port 3; the connecting plate 4 is arranged above the injection port 3, and the end of the connecting plate 4 close to the cavity plate 1 is provided with a plurality of positioning holes 5, and the positioning holes 5 are used to install one end of the sound array guide cover 7 (upper mold) to the bottom of the connecting plate 4 through a fixing member 6, so that the other end of the sound array guide cover 7 is extended into the compression molding cavity 2, and a cavity 8 to be infiltrated is formed between the sound array guide cover 7 and the compression molding cavity 2, and the cavity 8 to be infiltrated is used to fill the glue (liquid polyurethane rubber is selected in this embodiment); two groups of tension bolts 9 are respectively arranged between the cavity plate 1 and the connecting plate 4, and the two ends of the tension bolts 9 pass through the cavity plate 1 and the connecting plate 4 respectively. Locking nuts 10 are provided to adjust the thickness of the cavity 8 to be infiltrated. In the above, by designing a discharge trough 11 at the injection port 3 to store excess glue, the infiltration molding method used to prepare the vulcanized shell can eliminate the defect of residual traces of the pouring port in the previous pouring process; at the same time, since the parts in the acoustic array are pressure-sensitive components, they cannot withstand the high temperature (150°C) and high pressure (8-9MPa) used in the press molding. Therefore, the press used in the previous extrusion molding is changed to a tensioning structure, so that during the injection of the glue, it can be ensured that there is a tensioning margin for the tension bolts 9, so that the cavity 8 to be infiltrated has a certain matching clearance. , to fill with excess glue, so that the glue reacts in the cavity 8 to be infiltrated for a period of time and becomes sticky, and then the tension bolts 9 are fixed between the cavity plate 1 and the connecting plate 4 through the locking nut 10 to eliminate the tension margin, and drive the sound array flow deflector 7 to extend into the cavity plate 1 to achieve complete mold closing action, and squeeze out the excess glue from the cavity 8 to be infiltrated, thereby preventing the glue from being excessively squeezed during the infiltration molding process, resulting in the inability to demold, or the inadequate squeezing causes the gap in the fitting part to be too large, resulting in a sudden change in the overall linear shape of the product, thereby ensuring the overall performance of the product. Then the vulcanization mold filled with glue is placed in an oven for vulcanization reaction, and after the vulcanization reaction is completed, it is demolded to form a vulcanized shell on the periphery of the sound array flow deflector 7. The vulcanization mold has a simple structure and is easy to use. It can eliminate the defects of the previous pouring gate and improve the molding quality of the product.

[0039] In this embodiment, the bottom of the connecting plate 4 is extended downward to be provided with a positioning step, which is a circular ring structure with an angle at the bottom, and the angle is a 30° inclined surface, which is used to guide the end of the connecting plate 4 connected to the acoustic array flow guide 7, so that the end of the acoustic array flow guide 7 is sleeved on the outer periphery of the positioning step, and the positioning step is used to limit the acoustic array flow guide 7, so as to prevent the acoustic array flow guide 7 from being subjected to radial force and deflected when the acoustic array flow guide 7 is squeezed when the mold is closed and sunk into the mold cavity plate 1. Among them, the inner diameter matching clearance between the connecting plate 4 and the acoustic array flow guide 7 is less than 0.05mm.

[0040] Furthermore, a discharge trough 11 connected to the injection port 3 is provided at the top of the cavity plate 1, and the bottom of the discharge trough 11 is at least 5 mm higher than the top of the cavity 8 to be infiltrated; by designing the discharge trough 11, the excess glue can be stored, and due to the effect of surface tension, a proper amount of glue will remain in the discharge trough 11 to complete the shrinkage compensation of the rubber during the vulcanization process. In the above, in order to prevent the glue from accumulating on the top of the cavity 8 to be infiltrated and contaminating the shell, a through groove 12 that runs through the outer periphery of the cavity plate 1 is provided on one side of the discharge trough 11 to discharge the excess glue. Specifically, the through groove 12 is an "I"-shaped through groove 12, so as to facilitate the cleaning of the glue remaining in the through groove 12.

[0041] In this embodiment, the mold cavity plate 1 is a "concave"-shaped structure, and an annular discharge groove 11 and a "straight" groove 12 are opened on the outer periphery of the "concave"-shaped top mold cavity, and the discharge groove 11 is connected with the "straight" groove 12, so that the glue can overflow from the discharge groove 11 and flow out of the mold cavity plate 1 from the "straight" groove 12. At the same time, a mounting portion is extended outward from the outer periphery of the "concave"-shaped top mold cavity, and three mounting holes are evenly opened on the mounting portion along the circumference to position and install the tension bolts 9.

[0042] Furthermore, positioning platforms 13 are respectively provided at both ends of the tension bolt 9, and the two positioning platforms 13 are respectively in contact with the opposite surfaces of the connecting plate 4 and the cavity plate 1, so as to effectively limit the upper mold and the lower mold during the mold closing process, thereby preventing the tension bolts 9 from causing excessive extrusion of the glue during the mold closing process; the two positioning platforms 13 are respectively provided with threaded connection parts at one end away from each other, and the threaded connection parts pass through the connecting plate 4 or the cavity plate 1 and are connected with the locking nut 10, so as to facilitate the upper mold and the lower mold to be respectively fixed on the tension bolts 9 through the locking nut 10 to realize the mold closing action.

[0043] Furthermore, a support platform 15 is provided at the bottom of the mold cavity plate 1, and the support platform 15 is configured with a plurality of pads 16. One side of the pad 16 has a support surface 17 that fits the bottom edge of the support platform 15. The pad 16 is used to tilt and lift one side of the mold cavity plate 1 upward by 10-30° so that the cavity 8 to be infiltrated can be tilted synchronously, thereby avoiding the formation of bubble defects inside the cavity 8 to be infiltrated when the glue is vertically injected into the cavity 8 to be infiltrated; when the glue completely overflows the bottom of the cavity 8 to be infiltrated, the pad 16 is taken out so that the glue is vertically injected into the cavity 8 to be infiltrated to ensure that the glue is evenly distributed in the cavity 8 to be infiltrated.

[0044] Furthermore, a plurality of assembly holes 18 are provided on the periphery of the cavity plate 1 and / or the connecting plate 4; each assembly hole 18 is provided with a handle, the handle comprising a connecting portion 19 and a hand-held portion 20, the connecting portion 19 can be detachably mounted in the assembly hole 18, the hand-held portion 20 is arranged outside the assembly hole 18, and is integrally formed with the connecting portion 19. By designing the handle, when carrying the vulcanization mold or tilting and lifting one side of the vulcanization mold to place the cushion block 16, the labor intensity can be reduced and it is easy to take. Specifically, the connecting portion 19 is threadedly mounted in the assembly hole 18, and the outer surface of the hand-held portion 20 is engraved with knurling and a conical structure to increase friction and prevent slipping when grasping.

[0045] Furthermore, an observation port 14 is provided in the middle of the connecting plate 4, and a plurality of positioning holes 5 are evenly distributed around the observation port 14. When installing the fixing member 6, it is convenient to find the prefabricated hole of the sound array air guide cover 7 through the observation port 14. In the above, the fixing member 6 is a fixing screw or a fixing bolt, which passes through the positioning hole 5 and is threadedly connected to the prefabricated hole of the sound array air guide cover 7; the number and position of the positioning holes 5 and the prefabricated holes of the sound array air guide cover 7 are respectively set one by one. Specifically, the number of the positioning holes 5 is four, and the four positioning holes 5 are evenly distributed along the center line of the observation port 14.

[0046] The present invention also provides a molding method for acoustic array infiltration molding, which is applied to the above-mentioned vulcanization mold, and the molding method comprises the following steps: step 1, respectively assembling the mold cavity plate 1, the connecting plate 4, the tension bolts 9, the fixing parts 6 and the acoustic array air guide cover 7, so as to form a cavity 8 to be infiltrated after the acoustic array air guide cover 7 and the mold cavity plate 1 are molded together, and there is a fitting gap in the cavity 8 to be infiltrated; step 2, injecting glue into the cavity 8 to be infiltrated through the injection port 3, and standing for 5-20 minutes; specifically, tilting the cavity 8 to be infiltrated by 10-30 degrees, injecting glue until the glue overflows the bottom of the cavity 8 to be infiltrated, and stopping injecting glue; placing the cavity 8 to be infiltrated vertically, and continuing to inject glue until the glue fills the cavity 8 to be infiltrated. Step 3: Press the acoustic array air guide cover 7 into the compression molding cavity 2 by tensioning bolts 9 to adjust the thickness of the cavity 8 to be infiltrated to a preset thickness and squeeze out excess glue; Step 4: Place the mold filled with glue in an oven and heat it at 40-60°C for 12-72h; Step 5: Demold to form a vulcanized shell on the periphery of the acoustic array air guide cover 7.

Claims

1. A sound array infiltration molding vulcanization mold, characterized in that: The vulcanization mold comprises: A cavity plate (1) has a compression molding cavity (2), wherein a material injection port (3) is provided at the top of the compression molding cavity (2); A connecting plate (4) is arranged above the injection port (3), and a plurality of positioning holes (5) are arranged at one end of the connecting plate (4) close to the mold cavity plate (1). The positioning holes (5) are used to mount one end of the acoustic array flow guide cover (7) to the bottom of the connecting plate (4) through a fixing member (6), so that the other end of the acoustic array flow guide cover (7) can be extended into the compression molding cavity (2), and a cavity to be impregnated (8) is formed between the acoustic array flow guide cover (7) and the compression molding cavity (2), and the cavity to be impregnated (8) is used to be filled with glue; At least two groups of tension bolts (9), the two groups of tension bolts (9) are respectively arranged between the mold cavity plate (1) and the connecting plate (4), and the two ends of the tension bolts (9) respectively penetrate the mold cavity plate (1) and the connecting plate (4) and are provided with locking nuts (10) for adjusting the thickness of the cavity (8) to be infiltrated.

2. The acoustic array infiltration molding vulcanization mold according to claim 1, characterized in that: The top of the cavity plate (1) is provided with a discharge groove (11) connected to the injection port (3), and the bottom of the discharge groove (11) is at least 5 mm higher than the top of the cavity (8) to be wetted.

3. The acoustic array infiltration molding vulcanization mold according to claim 2, characterized in that: A through groove (12) penetrating the outer circumference of the cavity plate (1) is provided on one side of the discharge groove (11).

4. The acoustic array infiltration molding vulcanization mold according to claim 1, characterized in that: Positioning platforms (13) are respectively provided at both ends of the tension bolt (9), and the two positioning platforms (13) are respectively in contact with the opposite surfaces of the connecting plate (4) and the cavity plate (1); The two positioning platforms (13) are respectively provided with a threaded connection portion at one end away from each other, and the threaded connection portion penetrates the connecting plate (4) or the cavity plate (1) and is connected to the locking nut (10).

5. The acoustic array infiltration molding vulcanization mold according to claim 1, characterized in that: A support platform (15) is provided at the bottom of the cavity plate (1), and the support platform (15) is provided with a plurality of cushion blocks (16). One side of the cushion block (16) has a support surface (17) that fits the bottom edge of the support platform (15), and the cushion block (16) is used to tilt one side of the cavity plate (1) upward by 10-30 degrees.

6. The acoustic array infiltration molding vulcanization mold according to claim 1, characterized in that: The outer periphery of the cavity plate (1) and / or the connecting plate (4) is provided with a plurality of assembly holes (18); Each of the assembly holes (18) is provided with a handle, and the handle comprises: A connecting portion (19) detachably mounted in the assembly hole (18); The hand-held portion (20) is arranged outside the assembly hole (18) and is connected to the connecting portion (19).

7. The acoustic array infiltration molding vulcanization mold according to claim 1, characterized in that: An observation port (14) is provided in the middle of the connecting plate (4), and a plurality of positioning holes (5) are evenly distributed around the observation port (14).

8. The acoustic array infiltration molding vulcanization mold according to claim 7, characterized in that: The fixing member (6) is a fixing screw or a fixing bolt, and the fixing screw or the fixing bolt passes through the positioning hole (5) and is connected to the prefabricated hole of the sound array guide cover (7); The number and positions of the positioning holes (5) and the prefabricated holes of the acoustic array flow deflector (7) are respectively arranged in one-to-one correspondence.

9. A method for forming an acoustic array by infiltration forming, characterized in that: The molding method is applied to the vulcanization mold according to any one of claims 1 to 8, and the molding method comprises the following steps: S1, respectively assembling the cavity plate (1), the connecting plate (4), the tension bolts (9), the fixing parts (6) and the acoustic array guide cover (7), so that the acoustic array guide cover (7) and the cavity plate (1) are molded together to form a cavity (8) to be infiltrated, and a matching gap exists in the cavity (8) to be infiltrated; S2, injecting glue into the cavity (8) to be infiltrated through the injection port (3), and letting it stand for 5-20 minutes; S3, pressing the acoustic array flow deflector (7) into the compression molding cavity (2) by means of tension bolts (9) to adjust the thickness of the cavity (8) to be impregnated to a preset thickness, and squeezing out excess glue; S4, placing the mold filled with glue in an oven and heating at 40-60°C for 12-72h; S5, demoulding, forming a vulcanized shell on the outer periphery of the acoustic array fairing (7).

10. The method for forming an acoustic array by infiltration molding according to claim 9, characterized in that: The injection method of the glue is: The cavity to be infiltrated (8) is tilted at 10-30 degrees, and the glue liquid is injected until the glue liquid overflows the bottom of the cavity to be infiltrated (8), and the injection of the glue liquid is stopped; The cavity (8) to be infiltrated is placed vertically, and the glue liquid is continuously injected until the cavity (8) to be infiltrated is completely filled with the glue liquid.

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