WO2017000818A1

WO2017000818A1 - Mould for hollow-structured box body of polymer audio device and audio device box body manufacturing method therefor

Info

Publication number: WO2017000818A1
Application number: PCT/CN2016/086697
Authority: WO
Inventors: 陈建新
Original assignee: 陈建新
Priority date: 2015-07-01
Filing date: 2016-06-22
Publication date: 2017-01-05
Also published as: CN104943187A; CN104943187B

Abstract

Disclosed are a mould for a hollow-structured box body of a polymer audio device and an audio device box body manufacturing method using the mould. The mould comprises a fixing outer casing (1) and a silicone mould. The fixing outer casing (1) is detachably provided outside the silicone mould. The silicone mould comprises a mould cavity (21), a mould core (22) and a mould parting plate (23), wherein edges of the mould cavity (21) and edges of the mould core (22) are connected, and the mould parting plate (23) is provided along other edges of the mould cavity (21) and the mould core (22), and when the mould parting plate (23) of the mould cavity (21) and the mould core (22) is closed, the mould core (22) is inside the mould cavity (21), the clearance between the mould core (22) and the mould cavity (21) forms an injection cavity, and a pouring hole is provided on the injection cavity. The method comprises steps such as designing mould species, completing the mould, mixing ingredients, injecting, and vacuum forming. The mould fixes the mould core inside the mould cavity, and the inner cavity of the box body is formed by means of the mould to ensure that the wall of the box body is of a consistent thickness, and the method adds fillers and carbon fibres to resin, improving the density and the toughness of the box body.

Description

Hollow structure polymer acoustic box mold and acoustic box manufacturing method thereof

Technical field

The invention relates to the technical field of production of an acoustic box, in particular to a mold of a hollow structure polymer acoustic box and a method for manufacturing the same.

Background technique

The mold of the existing resin sound box mainly includes left and right molds. In order to form the hollow structure of the box, it is mainly carried out by means of shaking. The resin is injected into the cavity, and the mold is manually turned over to form a layer of paint on the inner wall of the cavity, and then the case is formed by vacuum curing. However, the acoustic box body produced by the mold has inconsistent wall thickness, and the inner wall is not smooth. The density of the produced resin sound is only 1.1-2.2 g/cm ³ , and the sound box body is easy to resonate when used, resulting in poor sound effect. . In addition, due to the hard and brittle nature of the resin material, the assembly holes on the housing are not very accurate, and cracks are likely to occur, so that the assembled sound box has poor sealing performance and is prone to air leakage. It can be seen that the existing resin sound has the following technical problems: the wall thickness of the box is inconsistent, and the density is low, which affects the sound effect.

Summary of the invention

In view of the above-mentioned drawbacks in the prior art, the mold of the present invention solves the problem of inconsistent wall thickness of the existing resin acoustic box, and the production thereof is convenient to solve the problem of low density.

In order to achieve the above object, the present invention provides the following technical solutions:

a mold of a hollow structure polymer sound box, comprising a fixing jacket and a silicone mold, the fixing jacket being detachably disposed outside the silicone mold, the silicone mold comprising a cavity, a core and a partial mold, The edge of the cavity is connected to the edge portion of the core, in the cavity, the core The other edge is provided with the partial die. When the cavity is closed with the split mold of the core, the core is placed inside the cavity, and the gap between the core and the cavity forms an injection cavity. a pouring hole is formed in the injection cavity. The core is fixed inside the cavity, and the inner cavity of the box is formed by the mold to ensure that the wall thickness of the produced box can be uniform. The fixed jacket can be made of gypsum, ABS, PPT, metal or the like.

In a preferred embodiment of the present invention, the fixing jacket includes an inner sub-case and an outer sub-sleeve, the outer sub-sleeve fixing an outer portion of the cavity, and the inner sub-sleeve is inserted into an inner portion of the core to The bottom of the inner sub-casing is connected to the cavity, the bottom cross-sectional dimension of the inner sub-sleeve is not greater than the top cross-sectional dimension thereof, the core is provided with a thickening portion, and the thickening portion is disposed at the inner side of the core Wide. For some shaped box shapes, for example, the shape of the core is large in the middle, the ends are small, or the bottom of the core is larger than the size of the top, these types of cores are difficult to lay and difficult to demold. In order to satisfy the case of producing such a shape, a thickening portion is provided at the widest part of the core, and the inner wall of the core is reduced in size by the thickening portion, so that the bottom cross-sectional size of the inner sub-case can be reduced, so as to facilitate When assembling, insert the inner sub-case into the inside of the core. At the same time, the thickened portion can support the shape of the core. When the mold is split, the outer sub-case is placed outside the cavity, and the inner sub-case is inserted into the inside of the core, so that the inner sub-case is used to support the core. The inner sub-sleeve and the thickened portion simultaneously support the inner part of the inner sub-sleeve, and the shape of the fixed core solves the problem that the opening of the box body is too small, and the inner core sleeve of the inner part of the box cannot be assembled or demolded.

In a preferred embodiment of the present invention, the inner sub-sleeve includes a plurality of support blocks, the number of the support blocks is the same according to the number of the compartments of the core, and the support blocks are combined with the core after being assembled. The shape corresponds. When the structure of the core includes a plurality of compartments having a large size, such as the use of a thickened portion of the core, the thickened portion may be easily deformed, thereby causing deformation of the manufactured product. By splitting the inner sub-assembly into a plurality of support blocks, the respective support blocks are respectively formed into compartments to ensure that the shape of the core does not occur. Raw deformation.

In a preferred embodiment of the present invention, a positioning member is disposed on the split mold piece connected to the cavity, and a positioning member 2 is disposed on the split mold piece connected to the core. When the cavity and the core are closed, the The positioning component is connected to the positioning component 2 to ensure that no sliding occurs between the closed cavity and the core.

In a preferred embodiment of the present invention, a sliding device is further included, the sliding device includes a gear and a rack, and the parting surface of the sub-cover is a vertical surface on a bottom surface and/or a top of the sub-cover A gear is disposed on the face, and the gear is movably coupled to the rack. The gear rack is used to accurately position the closed position of the plaster mold, thereby accurately positioning the closed position of the silicone mold inside the plaster mold, and accurately controlling the closing speed of the mold. The design of the upper and lower molds is prone to external expansion and deformation due to the action of gravity. Therefore, the present invention adopts the left and right molds to avoid the problem that the cavity of the plaster mold is easily deformed.

In a preferred embodiment of the present invention, the apparatus further includes an inverting device including an upper frame, a lower frame, a rotating shaft, and a rotating wheel, wherein the upper frame and the lower frame are connected by an elastic member, and the rotating shaft is disposed at the The upper or lower frame is connected to the inner diameter of the rotating wheel. When the rotating wheel rotates, the fixed outer casing is rotated around the center of the rotating wheel, so that the mold is turned over, and the inverted mold is still positioned by the gear. On the rack. The mold is clamped by the upper frame and the lower frame, and the mold is turned upside down by the rotation of the rotating wheel, so that the upper and lower positions of the mold can be exchanged, and the upper and lower positions of the mold are prevented from being fixed, so that the inside of the cavity is unidirectionally stressed, and the one-way force is solved. Forced to cause deformation of the cavity. At the same time, the ingredients are injected into the mold from the bottom of the mold, and the injection port is turned from the bottom to the top by flipping the mold. The ingredients quickly and evenly spread the entire mold cavity, and the bubbles generated during the injection process are discharged through the injection port.

The invention also provides a method for manufacturing a polymer acoustic box, which uses the above mold, including

Step S101: designing a mold of the sound box body, the mold type comprising an assembly mold of the sound box body. The assembly model includes: a box mold and a back plate mold. One side of the box mold is opened; the back sheet mold can be placed in the opening of the box mold, and the opening of the box mold is sealed by bonding.

Step S102: applying organic silica gel on the surface of the mold, and curing the organic silica gel to form an organic silica gel mold, and fixing a jacket on the outer surface of the organic silica gel mold, and then demoulding the mold from the organic silica gel mold. A fixing jacket is arranged on the outside of the silicone mold, and the fixing jacket is used for fixing the shape of the silicone mold to prevent the silicone mold from being deformed during use. In this step, two sets of molds of the back plate and the box body are respectively prepared.

Due to the viscous nature of the silicone mold, when it is used for a period of time, some residual ingredients will appear on the inner surface, especially at the corners. The cavity can be cleaned easily and efficiently by opening the cleaning hole.

Step S103: adding a filler, a carbon fiber forming raw material to the resin, the resin being an unsaturated polyester resin or an epoxy resin, the filler comprising calcium carbonate powder, cement and/or natural ore, the resin and the filler The weight ratio of the carbon fiber to the carbon fiber is 40-48:50-58:1, and then the curing agent is added. The weight of the curing agent is 0.5-1% by weight of the raw material, and the curing agent is mixed with the raw material after stirring, and the carbon fiber can also be used. Glass fiber replacement. The addition of carbon fibers and fillers to the epoxy resin or unsaturated polyester resin increases the density and toughness of the article. There is no proportional limitation between the filling materials, and it may be one of them or several. Specifically, what kind of material is filled is determined according to the characteristics of the product. The cement is made of Portland cement or sulphoaluminate cement. Natural mineral sand refers to quartz sand and its main component is silica.

Step S104: the ingredients prepared in step S103 are injected into the organic silica gel mold prepared in step S102, and the fixing jacket is still fixed on the outside of the silicone mold;

Step S105: placing the organic silicone mold injected into the batch into the vacuum box together with the fixing jacket. The vacuum degree in the vacuum box is made to be -0.15 MPa. After the batch is solidified and molded, the mold is taken out and demolded to form an assembly prototype. The ingredients are solidified in a vacuum environment to allow the air in the ingredients to escape, preventing air bubbles from forming in the prototype.

Step S106: The prototype is washed with a sodium hydroxide solvent having a pH of 14; and the stain on the surface of the prototype is removed by a sodium hydroxide solvent.

Step S107: The prototype is opened by using a numerical control device, so that the position of the hole is accurate to 0.1 mm. Electronic components are placed inside the speaker through the hole. At the same time, the bell mouth can be fixed to the sound box through the hole. The accurate position to 0.1mm effectively solves the delicate problem of assembling the resin sound box and electronic components.

Step S108: assembling the prototype of the assembly, and bonding the prototypes of each assembly by resin, and curing the glue to form an acoustic cabinet, the resin being an unsaturated polyester resin or an epoxy resin.

In this step, the assembled pieces are bonded and assembled with the same material of the resin to ensure the same material density of the entire sound box. At the same time, since the material used for bonding is the same as the prototype of the assembled part, the assembled parts can be effectively integrated into one body, the sealing property of the assembled box is improved, and the air leakage due to the structural structure of the box is solved. The problem.

In a preferred embodiment of the present invention, in step S108, the ABS speaker ring is fixed at the bell mouth position of the acoustic box body, and the resin in the step S103 is placed in a vacuum with a vacuum degree of -0.15 MPa. The assembly is bonded to the assembly by the resin.

In a preferred embodiment of the present invention, after the step S108, the method further includes:

In step S109, polishing and polishing, the surface of the speaker is polished with 100-2000# sandpaper, and then polished, sprayed, and painted. Surface treatment includes spraying, painting, fuel injection, vacuum plating, water plating, UV plating, and the like.

In a preferred embodiment of the present invention, the raw material in the step S103 is further added with a decorative object and a coloring material, the decorative material being 10-5000 mesh. The decorative object used is one or more of natural ore powder, wood, cement block, leaf, crystal, pebbles, rope, carbon fiber, luminous powder or natural ore powder, and the decorative object is 10-5000 mesh. The decorative object is not limited to the above materials, and the hard decorative object whose particle size is too large needs to be broken into 10-5000 meshes, such as soft decorative objects such as leaves, ropes, etc., which may or may not be broken. broken.

In a preferred embodiment of the present invention, step S103 includes:

In step S1031, the raw material obtained by stirring the resin and the color material is subjected to degassing of the film; in this step, the air in the raw material can be efficiently discharged.

In step S1032, the raw material after degassing in the above step is added to a curing agent having a weight of 0.5% of the raw material and stirred uniformly, and then placed in a vacuum box to ensure that the mixed liquid does not re-mix with new air. The gas originally stored in the raw material is discharged in step S1031 to avoid excessive primary gas during the mixing process, and it is necessary to prolong the mixing time in the vacuum environment; and then, in step S1032, degassing is performed during the mixing process to prevent the raw material after the mixing. bubble. ,

In a preferred embodiment of the present invention, in step S104, the ingredients are injected into the mold under a vacuum of -0.15 MPa, and the flow rate of the ingredients is controlled to be 0.1-0.5 kg/Sec during the injection. In this step, the ingredients are injected, the flow rate of the injection is controlled, and the new air is prevented from entering the test. If the speed is greater than 1 kg/Sec, the batch is too late to fill the cavity of the mold and overflows from the gate; if the speed is less than 0.05 kg/Sec, As the casting time is too long, the viscosity of the ingredients will become larger and larger, resulting in the appearance of pores.

The beneficial effects of the invention are:

1) The silicone mold adopts the structure of the cavity and the core, and changes the original mode of production of the cavity resin product to ensure that the wall thickness of the produced box is uniform;

2) The flipping device can flip the mold up and down, prevent the unidirectional force inside the mold cavity, further prevent the deformation of the cavity, and can quickly and uniformly fill the entire mold cavity, and the injection process The bubbles generated in the air are discharged through the injection port;

3) adding carbon fiber or glass fiber to epoxy resin and unsaturated polyester resin to increase the density and toughness of the product;

4) The same material is used to bond the assembled parts to ensure that the material density of the entire sound box is the same.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic structural view of a mold according to an embodiment of the present invention;

2 is a schematic structural view of a mold according to another embodiment of the present invention;

3 is a schematic structural view of a split mold piece according to an embodiment of the present invention;

4 is a schematic structural view of a mold apparatus according to an embodiment of the present invention;

Figure 5 is a cross-sectional view showing a finished sound box body of the present invention.

detailed description

The technical solutions of the present invention are clearly and completely described in the following with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The mold of the hollow structure polymer acoustic box in one embodiment of the present invention, as shown in FIG. 1, includes a fixed jacket and a silicone mold. The silicone mold includes a cavity 21, a core 22, and a parting sheet 23. The interior of the cavity 21 is hollow, the surface is open, and is in the shape of a container. The intermediate position of the longitudinal section is smaller than the size of the both ends, and the edge of the cavity 21 is formed at the opening. The core 22 has a hollow interior, a surface opening, and a container shape similar in shape to the cavity 21. The opening forms a rim of the core 22, and the size of the core 22 is smaller than the size of the cavity 21, so that the core 22 can be placed on the core 22 The interior of the cavity 21. One-third of the edge of the cavity 21 is connected to one-third of the edge of the core 22, and the cavity 21 and the core 22 are integrally formed of silica gel. The split mold piece 23 is disposed on the other two-thirds of the edge of the cavity 21 and on the other two-thirds of the edge of the core 22. When the cavity 21 and the split mold piece 23 at the edge of the core 22 are closed, the core 22 is located inside the cavity 21, and the gap between the core 22 and the cavity 21 forms an injection cavity. A casting hole is formed in the cavity 21, and the raw material 14 is poured into the injection chamber through the pouring hole. The core 22 is provided with a thickened portion 24 which is located at the widest point at the bottom of the longitudinal section of the core 22, so that the width of the widest portion of the bottom is reduced to the same size as the middle of the longitudinal section.

The fixed jacket 1 includes

outer jackets

11, 12 and inner jackets 13. The outer sub-shells 11, 12 are formed in an "L" shape, and the two are joined together to form a frame, and the inner shape of the frame corresponds to the shape of the outer surface of the opposite side of the cavity 21. The shape of the outer surface of the inner sub-casing 14 corresponds to the shape of the inner side surface of the core 22 and the thickened portion 24 combined. When the outer sub-casings 11, 12 and the inner sub-casings 13 are merged together, the closed cavity 21 and the core 22 are enclosed inside, so that the fixed outer casing can support the shape of the fixed silicone mold. The inner wall of the core 22 is reduced in size by the thickened portion 24, so that the longitudinal section of the inner sub-casing 13 is formed to have a shape that is small inside and outside, so that the inner sub-sleeve 13 is inserted into the inside of the core 22 at the time of joining. When the mold is split, the outer sub-casings 11, 12 are placed outside the cavity 21, and the inner sub-cassette 13 is inserted into the inside of the core 22, so that the inner sub-casing 13 is used to support the core 22. The inner sub-sleeve 13 and the thickened portion 24 simultaneously support the inner portion of the inner sub-casing 13 and fix the outer shape of the core 22 to solve the problem that the opening of the box body is too small. The problem that the core and the inner sub-case inside the box cannot be assembled or demolded.

When the shape of the audio product is relatively special, in one embodiment, as shown in FIG. 2, the core 22 includes three compartments 220. Correspondingly, the inner sub-sleeve 13 includes three support blocks 130. The shapes of the three support blocks 130 respectively correspond to the shapes of the three compartments 220, so that the assembled support block 130 can support the interior of the entire core to ensure its shape. constant. In order to facilitate demolding, a thickening block may be disposed at a corner of some of the special shaped compartments 220 to facilitate demolding between the supporting block 130 and the compartment 220.

As shown in FIG. 3, in order to ensure the accuracy of the closed position of the silicone mold, the sub-die 23 connected to the cavity 21 is provided with a bump 231, and the sub-die 23 connected to the core 22 is provided with a recess 232. When the cavity 21 and the core 22 are closed, the bump 231 is located in the recess 232 to ensure that no slip occurs between the closed cavity 21 and the core 22.

The fixed jacket is a gypsum sleeve, and the parting surface of the gypsum sleeve is a vertical surface, including three sub-gypsum sleeves 1, and only one sub-gypsum sleeve 1 is schematically illustrated in FIG. A gear 3.2 and a gear 3.1 are respectively disposed on the bottom surface and the top surface of the sub-gypsum jacket 1. The rack 4 is fixed below the sub-gypsum cover 1. The sub-gypsum jacket 1 is meshed with the rack 4 via a lower gear 3.2. If the longest dimension of the plaster mold is greater than 30 cm, a sliding device may be respectively disposed on both sides of the bottom surface and the top surface of the sub-gypsum sleeve 1, that is, the sub-gypsum sleeve 1 is slid on the two parallel racks by gears to improve the gypsum sleeve. Stability during opening and closing. Also included is a turning device comprising an upper frame 6.1, a lower frame 6.2, a rotating shaft 7, and a rotating wheel 5. One end of the upper frame 6.1 is located at the top of the sub-gypsum cover 1, the other end is connected to one end of the lower frame 6.2 by a spring 8, and the other end of the lower frame 6.2 is located at the bottom of the sub-gypsum cover 1. The rotating shaft 7 is disposed on the upper frame 6.1, and the rotating shaft 7 is connected to the inner diameter of the rotating wheel 5. The sub-gypsum sleeve 1 slides on the rack to close the two sub-gypsum sleeves 1. The upper frame 6.1 and the lower frame 6.2 are controlled to move by the pneumatic device, so as to move to the top surface and the bottom surface of the closed gypsum sleeve parting surface respectively, and the gypsum sleeve is clamped by the spring. The raw material is injected into the closed mold. Electricity The machine drives the rotating wheel to rotate, and then drives the rotating shaft connected with the rotating wheel to rotate around the center of the rotating wheel, so that the closed mold is turned over, and the inverted mold is still positioned on the rack by the gear, and the upper and lower positions of the mold are reversed to realize the mold. The injection inlet is turned over to allow the material to quickly fill the entire injection chamber of the mold, and the bubbles inside the mold can be discharged upward.

The invention also provides a method for manufacturing a composite polymer material acoustic box using the above mold, comprising:

Step S101: designing a model of the sound box body, and the model includes an assembly model of the sound box body. The assembly model includes: a box mold and a back plate mold. One side of the box mold is opened; the back sheet mold can be placed in the opening of the box mold, and the opening of the box mold is sealed by bonding. The size of the mold should be reduced by 0.1 mm for the size of the product being produced. After the mold is completed, it is degreased and polished to ensure that the mold does not have problems such as particles, pores or deformation.

According to the size and shape of the mold, the size of the bottom plate and the position angle between the bottom plate and the mold are determined, and then the position of the grouting tank and the injection port is determined, so that the pulp can reach each part. Then determine the way the mold is opened and the position of the mold line. Set the oil and soil plate along the position of the mold line. The oil-soil plate is rectangular or square, and each oil-soil plate is fixedly connected by nailing. Then clean the oil soil with soapy water for trimming.

Step S102: applying organic silica gel on the surface of the back plate mold and the box mold respectively, and the organic silica gel is solidified to form an organic silica gel mold, and the gypsum jacket is fixed on the outside of the organic silicone mold. A fiber jacket can also be used to secure the silicone mold. After the silicone mold and the fixed gypsum jacket are molded, the mold is demolded.

Step S103: mixing unsaturated polyester resin, carbon fiber, filler, color material and decorative object, and stirring to form a raw material, and the weight ratio of the unsaturated polyester resin, the filler and the carbon fiber is 40-48:50-58:1. The proportion of the colorant and the decorative object can be increased into the raw material according to the appearance requirements of the product. The filler includes calcium carbonate powder, cement and/or quartz sand, and the ratio between the fillers is not required, and may be one or more kinds of mixing. Further, a curing agent is added, and the weight of the curing agent is 0.5% by weight of the raw material; wherein the decorative object may be natural ore powder, cement block, wood, leaves, crystal, pebbles, rope, carbon fiber, luminous powder or natural ore. The decorative object can form an organic texture pattern on the resin. For hard decorative objects whose particle size is too large, it needs to be broken to 10-5000 mesh. If it is a soft material, such as rope or leaves, it can be pulverized. In order to ensure that the density of the solidified cabinet can reach 2.7-2.8g/cm3 or more, the acoustic box produced can reduce the resonance and echo, make the sound quality full and clean, and the bass is dive. It needs to be in unsaturated polyester resin and epoxy. Carbon fiber and glass fiber are added to the resin to increase the toughness of the box and is not easy to be broken. The density of the box is 2.7-2.8 g/cm ³ or more, which is more than three times that of wood products and plastic products.

Step S104: The ingredients prepared in step S103 are injected into the silicone mold made in step S102. When injecting, it is ensured that the fixed jacket is still fixed on the outside of the silicone mold to avoid deformation during the injection process.

Step S105: placing the organic silicone mold injected into the batch into the vacuum box together with the fixing jacket, so that the vacuum degree in the vacuum box is -0.15 MPa. After the batch is solidified and formed, the mold is taken out and demolded to form an assembly prototype. . The air in the furnish is discharged by curing in a vacuum environment.

Step S107: The prototype is opened by using a numerical control device, so that the position of the hole is accurate to 0.1 mm. The electronic components of the sound can be placed inside the speaker through the hole, and the electronic component is connected to the bell mouth, and the outer circumference of the bell mouth can be bonded and fixed to the inner circumference of the hole.

Step S108: placing the unsaturated polyester resin or epoxy resin in a vacuum chamber with a degree of vacuum of -0.15 MPa for 5 minutes, using the vacuumed unsaturated polyester resin or the position of the bell mouth of the acoustic box body. The epoxy resin is fixed to the ABS resin horn ring, and the other prototype pieces are also bonded by vacuum unsaturated polyester resin or epoxy resin. As shown in Fig. 5, the ABS resin horn 02 is fixed by an unsaturated polyester resin or epoxy resin at the opening of the assembly blank 01.

In step S109, polishing and polishing, the surface of the speaker is polished with a fine sandpaper of 100-2000#, and then subjected to surface treatment such as polishing, spraying, painting, fuel injection, vacuum plating, water plating, UV plating, and the like.

In order to ensure that no pores are generated inside the produced resin sound box, in a preferred embodiment of the present invention, step S103 includes:

In step S1031, the raw material after the resin and the color material are uniformly stirred is subjected to degassing of the film; in this step, the air originally existing in the raw material can be efficiently discharged.

The gas originally present in the raw material is discharged through step S1031 to avoid excessive primary gas during the mixing process, resulting in the need to prolong the mixing time in the vacuum environment.

In step S1032, the raw material after the degassing treatment in the above step is added to a 0.5% curing agent and stirred to form an ingredient.

In order to prevent the ingredient from being injected into the mold, a new gas is generated. In a preferred embodiment of the present invention, in step S104, the ingredient is injected into the mold and then discharged under a vacuum of -0.15 MPa. Gas, the flow rate of the ingredients is controlled to be 1-0.5 kg/min during the injection of the ingredients into the mold.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

a mold for a hollow structure of a polymer acoustic box, comprising a fixing jacket and a silicone mold, the fixing jacket being detachably disposed outside the silicone mold, wherein the silicone mold comprises a cavity, a core and a part a die, a rim of the cavity is connected to a rim portion of the core, and the split dies are disposed on the other edges of the cavity and the core, and when the cavity is combined with the split of the core When closed, the core is located inside the cavity, and the gap between the core and the cavity forms an injection cavity, and a pouring hole is formed in the injection cavity.
The mold for a hollow structure polymer acoustic cabinet according to claim 1, wherein the fixing jacket comprises an inner sub-case and an outer sub-clip, the outer sub-clip fixing an outer portion of the cavity, the inner sub- Inserting the inside of the core to connect the bottom of the inner sleeve to the cavity, the inner sleeve has a bottom cross-sectional dimension no larger than a top cross-sectional dimension thereof, and the core is provided with a thickening portion, the adding The thick portion is disposed at the widest point inside the core.
The mold for a hollow structure polymer acoustic cabinet according to claim 2, wherein the core comprises a plurality of compartments, and the inner sub-casing comprises a plurality of support blocks, and the number of the support blocks is The number of compartments of the core is the same, and the support blocks are combined to correspond to the shape of the core.
The mold for a polymer acoustic box having a hollow structure according to claim 2 or 3, wherein a positioning member is disposed on the split mold piece connected to the cavity, and a positioning member 2 is disposed on the split mold piece connected to the core. When the cavity and the core are closed, the positioning member is connected to the positioning member to ensure that no sliding occurs between the closed cavity and the core.
The mold for a hollow structure polymer acoustic cabinet according to claim 4, further comprising a sliding device comprising a gear and a rack, wherein the parting surface of the sub-cover is a vertical surface, Providing a gear on a bottom surface and/or a top surface of the sub-casing, the gear is movably coupled to the rack; further comprising a turning device, the turning device comprising an upper frame, a lower frame, a rotating shaft, a rotating wheel, and the upper frame And The lower frame is connected by an elastic member, the rotating shaft is disposed on the upper frame or the lower frame, and the rotating shaft is connected with the inner diameter of the rotating wheel, and when the rotating wheel rotates, the fixed outer casing is rotated around the center of the rotating wheel. The mold is turned over, and the inverted mold is still positioned on the rack by the gear.
A method for producing a polymer acoustic cabinet, using the mold according to any one of claims 1 to 5, characterized in that

Step S101: designing a mold of the sound box body, the mold type comprising an assembly model of the sound box body;

Step S102: applying organic silica gel on the surface of the mold, and forming an organic silica gel mold after curing the organic silica gel, and fixing a jacket on the outer surface of the organic silica gel mold, and then demolding the mold from the organic silicone mold;

Step S103: adding a filler, a carbon fiber forming raw material to the resin, the resin being an unsaturated polyester resin or an epoxy resin, the filler comprising calcium carbonate powder, cement and/or natural ore, the resin and the filler The weight ratio of the carbon fiber to the carbon fiber is 40-48:50-58:1 and then the curing agent is added. The weight of the curing agent is 0.5-1% by weight of the raw material. After stirring, the curing agent is mixed with the raw material, and the carbon fiber can also be made of glass. Fiber replacement

Step S104: the ingredients prepared in step S103 are injected into the organic silica gel mold prepared in step S102, and the fixing jacket is still fixed on the outside of the silicone mold;

Step S105: placing the organic silicone mold injected into the batch into the vacuum box together with the fixing jacket, so that the vacuum degree in the vacuum box is -0.15 MPa. After the batch is solidified and formed, the mold is taken out and demolded to form an assembly prototype. ;

Step S106: cleaning the prototype of the assembly with a sodium hydroxide solvent having a pH of 14;

Step S107: using a numerical control device to open a hole in the assembly, so that the position of the hole is accurate to 0.1 mm;

Step S108: assembling the prototype of the assembly, and bonding the prototype pieces of each assembly by resin, and curing the glue to form an acoustic cabinet, the resin being an unsaturated polyester resin or an epoxy resin.
The method of manufacturing a polymer acoustic cabinet according to claim 6, wherein in step S108, an ABS horn is fixed to a bell mouth of the acoustic cabinet, and the resin is placed in a vacuum degree of - The assembly was bonded by the resin in a vacuum chamber of 0.15 MPa.
The method of manufacturing a polymer acoustic cabinet according to claim 6 or 7, wherein after the step S108, the method further comprises:

In step S109, the polishing is performed, and the surface of the speaker is polished with a fine sandpaper of 100-2000#, and then surface-treated.
The method of manufacturing a polymer acoustic cabinet according to claim 6 or 7, wherein the raw material in the step S103 is further provided with a decorative object and a coloring material, and the decorative object is 10-5000 mesh.
The method of manufacturing a polymer acoustic cabinet according to claim 6, wherein the step S103 comprises:

Step S1031, the raw material after the resin and the color material are uniformly stirred, and the film is degassed;

In step S1032, the raw material after the degassing treatment in the above step is added to a curing agent having a weight of 0.5% of the raw material and stirred uniformly, and then placed in a vacuum box;

In step S104, the ingredients are injected into the mold under a vacuum of -0.15 MPa, and the flow rate of the ingredients is controlled to be 0.1-0.5 kg/Sec during the injection.