Sound support injection mold

Abstract

The present application relates to the field of injection molding, and discloses an injection mold for a sound support, comprising a fixed mold base, a movable mold base, a fixed mold and a movable mold, wherein the movable mold is provided with a mounting area on the side of the mold cavity away from the fixed mold, and an inner mold base is mounted in the mounting area; a plurality of protruding pins are arranged on one side of the inner mold base, and the ends of the protruding pins extend into the mold cavity; an ejection unit comprises an ejection groove arranged at the bottom of the mold cavity and an abutment arranged in the ejection groove; initially, one end of the abutment is flush with the opening of the ejection groove, and the other end of the abutment extends a top shaft in the shape of a hollow shaft, the end of the top shaft extends into the mounting area, and the end face of the abutment is provided with a top hole in communication with the top shaft; a top pin is sleeved in the top shaft, one end of the top pin extends into the mounting area, and the other end of the top pin is located in the top hole; during demolding, the protruding pins first move away from the holes of the sound support, then the sound support is pushed away from the mold cavity by the abutment, and finally the sound support is pushed away from the abutment by the top pin.

Description

Technical Field

[0001] This invention relates to the field of injection molding technology, specifically to the field of speaker bracket injection molding technology, and particularly to an injection mold for a speaker bracket. Background Technology

[0002] TV speaker stands are accessories specifically designed to support or mount TV speakers (most commonly long, rectangular soundbars) and ensure a perfect match with the TV. Their shape is similar to... Figure 1 As shown.

[0003] Speaker stands are typically manufactured using injection molding. Because speaker stands often have lips, clips, or complex internal structures, the cooled plastic parts tend to stick to the mold cavity. Among existing demolding techniques, the most common is ejector pin demolding. Simply put, this involves using one or more precision metal rods (ejector pins) to "push" the cooled, molded plastic product out of the mold cavity after the mold is opened. However, this method has some drawbacks. Specifically: because the ejector pins are thin, the contact area between them and the plastic product is very small, essentially a point contact. During demolding, the ejection force is concentrated at this small point of contact, easily causing excessive pressure on that area of ​​the product, which can easily lead to defects such as whitening, excessive height, sinking, and ejector pin marks. In addition, for example... Figure 1 As shown, the surface of the speaker bracket has a large number of holes. During injection molding, corresponding protrusions are set in the mold cavity to shape the holes. When the ejector pins are used for demolding, the adhesion between the holes and the protrusions can easily lead to defects in the appearance and quality of the product.

[0004] Based on the above, the present invention proposes an injection mold for an audio bracket. Summary of the Invention

[0005] To address the problems mentioned in the background above, the present invention provides an injection mold for an audio speaker bracket.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows.

[0007] An injection mold for an audio speaker bracket includes a fixed mold base, a movable mold base, a fixed mold disposed on the fixed mold base, and a movable mold disposed on the movable mold base. The movable mold has a cavity on the side facing the fixed mold. The movable mold also has an installation area located on the side of the cavity away from the fixed mold. An inner mold base is installed in the installation area. The moving direction of the inner mold base is parallel to the moving direction of the movable mold base. A plurality of protrusions are arranged in an array on one side of the inner mold base, and the ends of the protrusions extend into the mold cavity. The mounting area is arrayed with several ejection units. Each ejection unit includes an ejection groove located at the bottom of the mold cavity and a top seat located in the ejection groove. Initially, one end of the top seat is flush with the opening of the ejection groove, and the other end of the top seat extends into a hollow shaft. The end of the top shaft extends into the mounting area. The end face of the top seat is provided with a top hole communicating with the top shaft. An ejector pin is sleeved inside the top shaft. One end of the ejector pin extends into the mounting area, and the other end is located in the top hole. During demolding, the ejector pin first leaves the hole of the speaker bracket, then pushes the speaker bracket out of the mold cavity through the ejector pin, and finally pushes the speaker bracket out of the ejector pin through the ejector pin.

[0008] Furthermore, a support is provided in the installation area, and a gear is installed on the support. Both sides of the gear are meshed with racks. The extension direction of the racks is parallel to the moving direction of the moving mold base. One rack is connected to the inner mold base, and the other rack is connected to a guide sleeve at the end away from the mold cavity. The guide sleeve is equipped with a slider and a spring a, with the spring a located on the side of the slider facing the mold cavity. The slider extends a trigger rod a on the side away from the mold cavity, and the end of the trigger rod a extends out of the moving mold.

[0009] Furthermore, guide rods are provided in the installation area, and the guiding direction of the guide rods is parallel to the moving direction of the moving mold base; Main board a and main board b are slidably mounted on the guide rod, with main board a located on the side of main board b away from the mold cavity; Springs b and c are also fitted on the outside of the guide rod. Spring b is located between main plate a and main plate b, and spring c is located on the side of main plate b facing the mold cavity. The elastic coefficient of spring b is greater than that of spring c. The top spindle is connected to motherboard b, and the ejector pin is connected to motherboard a.

[0010] Furthermore, a fixed bracket is provided on the side of the moving mold base that is away from the fixed mold base; During the process of the ejector assembly moving together with the mold opening action of the moving mold base, when the end of the trigger rod a contacts the fixed bracket, the moving distance of the trigger rod a is h1, the distance between the end of the protrusion and the bottom of the mold cavity is h2, the distance between the end of the trigger rod b and the fixed bracket is h3, the distance between the end of the rack connected to the inner mold base away from the mold cavity and the side of the mounting area away from the mold cavity is h4, h2 equals h4, and the sum of h1 and h2 equals h3.

[0011] Furthermore, the end of the trigger rod a is provided with a nut, and initially, the nut is in contact with the fixed bracket on the side facing the moving mold base.

[0012] Furthermore, the mold cavity is provided with side mounting grooves on both sides along the width direction, and the mold cavity and the side mounting grooves are connected through side openings. The side mounting grooves are provided with side mold components. The side mold assembly includes a side mold pillar, the side mold pillar moves in a direction perpendicular to the moving mold base, and a protrusion extends from one side of the side mold pillar, the end of the protrusion passing through the side opening and extending into the mold cavity.

[0013] Furthermore, a spring d is provided between the side mold post and the side mounting groove, and the elastic force of the spring d drives the side mold post to approach the mold cavity; A demolding rod parallel to the moving mold base is provided in the side mounting groove. One end of the demolding rod extends into the mounting area and is provided with a connecting rod, while the other end is provided with an inclined surface. When the demolding rod moves closer to the fixed mold, the inclined surface of the demolding rod contacts the side mold pillar and pushes the side mold pillar away from the mold cavity.

[0014] Furthermore, a trigger rod c extends from one side of the connecting rod, parallel to the moving direction of the moving mold base. The end of the trigger rod c extends out of the moving mold base and is at a distance h5 from the fixed bracket. The trigger rod c moves closer to the fixed mold and moves together with the demolding rod, causing the side mold pillar to move away from the mold cavity. As a result, the distance the trigger rod c moves is h6 during the process of the protrusion leaving the side opening. The sum of h5 and h6 is greater than h3.

[0015] Furthermore, a convex ring is provided on one side of the inner mold base, and an insert block is provided on one side of the side mold pillar. Initially, the insert block is inserted into the convex ring, and the insertion direction of the insert block is parallel to the moving direction of the moving mold base.

[0016] Compared with the prior art, the beneficial effects of this invention are as follows: In this case, the retraction of the ejector pin is equivalent to demolding the speaker bracket through the hole; the forward pushing action of the ejector pin is equivalent to demolding the speaker bracket out of the mold cavity; and the forward pushing action of the ejector pin is equivalent to demolding the speaker bracket out of the ejector pin. Its technical advantages are: Technical effect 1: When the protruding pin moves backward, the speaker bracket is still located in the mold cavity, and the reaction force brought by the demolding action will make the speaker bracket and the bottom of the mold cavity come into close contact. In other words, when demolding the hole of the speaker bracket, the part of the speaker bracket other than the hole is supported by a surface contact, thereby maximizing the protection that the hole of the speaker bracket is not damaged during demolding. Technical effect 2: The speaker bracket is demolded from the mold cavity by the cooperation of the top seat and the ejector pin; Furthermore, the top seat first pushes the speaker bracket out of the mold cavity through surface contact, and the contact area is large. Therefore, it can solve the problem that "point contact can easily lead to concentrated ejection force and a series of defects". Furthermore, after the speaker bracket leaves the mold cavity, it only has surface contact with the top seat. Since the surface contact area between the speaker bracket and the top seat is relatively small compared to the contact area between the speaker bracket and the mold cavity, the adhesion force is also relatively weak. Therefore, the ejector pin only needs a weak ejection force to make the speaker bracket leave the top seat, and there is no problem of "point contact easily leading to concentrated ejection force". Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a speaker stand; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 4 This is a cross-sectional view of the invention when the mold is closed; Figure 5 This is a cross-sectional view of the invention during mold opening; Figure 6 A schematic diagram of the mold cavity for a moving mold; Figure 7 This is a schematic diagram of the inner mold base and the ejector assembly; Figure 8 This is a partial schematic diagram of the ejected component; Figure 9 This is an exploded view of the side mold assembly and the moving mold.

[0018] The labels in the attached diagram are: 100. Speaker bracket; 101. Hole; 102. Lip; 200. Fixed mold base; 201. Fixed mold; 300. Moving mold base; 301. Moving mold; 3011. Mold cavity; 3012. Side opening; 302. Inner mold base; 3021. Protruding pin; 3022. Protruding ring; 303. Ejector assembly; 304. Side mold assembly; 3041. Side mold pillar; 3042. Spring d; 3043. Protrusion; 3044. Insert block; 3045. 3046. Demolding rod; 3047. Connecting rod; 305. Trigger rod c; 306. Support; 307. Gear; 308. Rack; 309. Guide sleeve; 300. Trigger rod a; 310. Spring a; 311. Nut; 312. Trigger rod b; 313. Main board a; 314. Main board b; 315. Guide rod; 316. Spring b; 317. Spring c; 318. Top shaft; 319. Top seat; 320. Ejector pin; 400. Fixed bracket. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0020] Reference Figures 1-9 An injection mold for an audio speaker bracket includes a fixed mold base 200, a movable mold base 300, a fixed mold 201 disposed on the fixed mold base 200, and a movable mold 301 disposed on the movable mold base 300.

[0021] The moving mold 301 has a cavity 3011 on the side facing the fixed mold 201, and the moving mold 301 also has an installation area located on the side of the cavity 3011 away from the fixed mold 201.

[0022] An inner mold base 302 is installed in the installation area. The moving direction of the inner mold base 302 is parallel to the moving direction of the moving mold base 300. Several protrusions 3021 are arranged in an array on one side of the inner mold base 302. The ends of the protrusions 3021 extend into the mold cavity 3011. The moving mold 301 is provided with a clearance hole for avoiding the protrusions 3021. The purpose of the protrusions 3021 here is to correspond and match the holes 101 on the speaker bracket 100.

[0023] The mold cavity 3011 has side mounting grooves on both sides along its width direction. The mold cavity 3011 and the side mounting grooves are connected by a side opening 3012. A side mold assembly 304 is provided in the side mounting groove. Specifically, the side mold assembly 304 includes a side mold post 3041. The moving direction of the side mold post 3041 is perpendicular to the moving direction of the moving mold base 300. A protrusion 3043 extends from one side of the side mold post 3041. The end of the protrusion 3043 passes through the side opening 3012 and extends into the mold cavity 3011. The purpose of the protrusion 3043 here is to correspond and match the lip 102 of the speaker bracket 100.

[0024] During injection molding, the moving mold base 300 closes to the fixed mold base 200. Through the cooperation of the fixed mold 201, the mold cavity 3011, the protrusion 3021, and the protrusion 3043, an injection space that matches the speaker bracket 100 is formed. Then, the injection molding machine injects molten plastic into the injection space through the injection channel set on the fixed mold 201, thus completing the injection molding of the speaker bracket 100. After molding, the moving mold base 300 opens away from the fixed mold base 200. Then, the ejector assembly 303 ejects the speaker bracket 100 from the injection space.

[0025] I. Ejection Component 303: Reference Figure 7 and Figure 8 The ejector assembly 303 includes a support 305 disposed in the mounting area. A gear 306 is mounted on the support 305. A rack 307 meshes with both sides of the gear 306. That is, there are two racks 307, which are respectively located on both sides of the gear 306. The extending direction of the racks 307 is parallel to the moving direction of the moving mold base 300.

[0026] One rack 307 is connected to the inner mold base 302, and the other rack 307 is connected to a guide sleeve 308 at the end away from the mold cavity 3011. The guide sleeve 308 is fitted with a slider and a spring a310, and the spring a310 is located on the side of the slider facing the mold cavity 3011. A trigger rod a309 extends from the side of the slider away from the mold cavity 3011, and a nut 311 is provided at the end of the trigger rod a309 after it extends out of the moving mold 301.

[0027] The installation area is also equipped with a guide rod 315, and the guiding direction of the guide rod 315 is parallel to the moving direction of the moving mold base 300.

[0028] Main board a313 and main board b314 are slidably mounted on guide rod 315, with main board a313 located on the side of main board b314 away from mold cavity 3011.

[0029] The guide rod 315 is also fitted with springs b316 and c317. Spring b316 is located between main plate a313 and main plate b314, and spring c317 is located on the side of main plate b314 facing the mold cavity 3011. The elastic coefficient of spring b316 is much greater than that of spring c317.

[0030] The ejection assembly 303 also includes several ejection units arranged in an array.

[0031] Specifically, the ejection unit includes an ejection groove at the bottom of the mold cavity 3011 and a top seat 319 located in the ejection groove. Initially, one end of the top seat 319 is flush with the opening of the ejection groove, so that the bottom of the mold cavity 3011 is flat.

[0032] The other end of the top seat 319 extends into a hollow shaft 318. The end of the top shaft 318 extends into the mounting area and connects to the motherboard b314. The end face of the top seat 319 is provided with a top hole that communicates with the top shaft 318. A pin 320 is sleeved inside the top shaft 318. One end of the pin 320 is connected to the motherboard a313, and the other end is located in the top hole.

[0033] Reference Figure 2 A fixed bracket 400 is provided on the side of the moving mold base 300 away from the fixed mold base 200. The fixed bracket 400 is fixedly connected to the mold frame, which is not shown in the figure.

[0034] Furthermore, initially, the nut 311 is in contact with the fixed bracket 400 on the side facing the moving mold base 300. Therefore, with the cooperation of the two, the movement of the inner mold base 302 away from the mold cavity 3011 can be restricted. The purpose is to prevent the inner mold base 302 from retracting during the injection molding process and affecting the injection molding process of the product.

[0035] During the process of the ejector assembly 303 moving together with the moving mold base 300 as the mold opening action occurs, when the side of the nut 311 away from the moving mold base 300 contacts the fixed bracket 400, the moving distance of the trigger rod a309 is h1, the distance between the end of the protrusion 3021 and the bottom of the mold cavity 3011 is h2, the distance between the end of the trigger rod b312 and the fixed bracket 400 is h3, and the distance between the end of the rack 307 connected to the inner mold base 302 away from the mold cavity 3011 and the side of the mounting area away from the mold cavity 3011 is h4. h2 equals h4, and the sum of h1 and h2 equals h3.

[0036] The working process of ejector component 303: During the mold opening process of the moving mold base 300, the ejector component 303 moves together with the moving mold base 300. When the nut 311 contacts the fixed bracket 400, the moving mold base 300 continues to move with the gear 306, and through the cooperation of the gear 306 and the rack 307, it drives the inner mold base 302 and the protruding pin 3021 to retract. When the end of the protruding pin 3021 is flush with the bottom of the cavity 3011, the rack 307 connected to the inner mold base 302 will contact the side wall of the mounting area. At this time, the gear 306, rack 307 and guide sleeve 308 are equivalent to an integrated unit, and the trigger rod b312 contacts the fixed bracket 400. As the moving mold base 300 continues to move, spring a310 is compressed. At this time, since the spring force coefficient of spring b316 is much greater than that of spring c317, the moving distance of the main plate b314 is very small and negligible. It can be regarded as the main plate b314 being stationary. That is, the top shaft 318 and the top plate 319 are stationary. With the moving mold base 300 as the reference, it is equivalent to the top plate 319 moving forward and pushing the product in the mold cavity 3011. At the same time, the inner mold base 302 moves together with the moving mold base 300. When the product is ejected from the mold cavity 3011 by the top seat 319, the inner mold seat 302 contacts the main board b314. At this time, the product is only in contact with the surface of the top seat 319. Subsequently, as the moving mold base 300 continues to move, it will push the main board b314 to move together through the inner mold base 302. The spring b316 is compressed, that is, with the top seat 319 as a reference, the ejector pin 320 moves forward and pushes the product, pushing the product out of the top seat 319. This completes the ejection of the product.

[0037] In summary, in this case, the retraction of the protruding pin 3021 is equivalent to demolding the speaker bracket 100 through the hole 101; the forward pushing action of the top seat 319 is equivalent to demolding the speaker bracket 100 from the mold cavity 3011; and the forward pushing action of the ejector pin 320 is equivalent to demolding the speaker bracket 100 from the top seat 319. Its technical advantages are: Technical effect 1: When the protruding pin 3021 retracts, the speaker bracket 100 remains inside the mold cavity 3011, and the reaction force from the demolding action will cause the speaker bracket 100 to be in close contact with the bottom of the mold cavity 3011. In other words, when demolding the hole 101 of the speaker bracket 100, the part of the speaker bracket 100 except for the hole 101 is supported by a surface contact, thereby maximizing the protection that the hole 101 of the speaker bracket 100 is not damaged during demolding. Technical effect 2: The speaker bracket 100 is demolded from the mold cavity 3011 by the cooperation of the top seat 319 and the ejector pin 320; Furthermore, the top seat 319 first pushes the speaker bracket 100 out of the mold cavity 3011 through surface contact, and the contact area is large. Therefore, it can solve the problem that "point contact can easily lead to concentrated ejection force and a series of defects". Furthermore, after the speaker bracket 100 leaves the mold cavity 3011, it only has surface contact with the top seat 319. Since the surface contact area between the speaker bracket 100 and the top seat 319 is relatively small compared to the contact area between the speaker bracket 100 and the mold cavity 3011, the adhesion force is also relatively weak. Therefore, the ejector pin 320 only needs a weak ejection force to make the speaker bracket 100 leave the top seat 319, and there is no problem of "point contact easily leading to concentrated ejection force".

[0038] II. Side mold assembly 304: Reference Figure 9 A spring d3042 is provided between the side mold post 3041 and the side mounting groove, and its elastic force is used to drive the side mold post 3041 closer to the mold cavity 3011.

[0039] The side mounting groove is also provided with a demolding rod 3045 parallel to the moving direction of the moving mold base 300. One end of the demolding rod 3045 extends into the mounting area and is provided with a connecting rod 3046, and the other end is provided with an inclined surface. When the demolding rod 3045 moves closer to the fixed mold 201, the inclined surface of the demolding rod 3045 contacts the side mold pillar 3041 and pushes the side mold pillar 3041 away from the mold cavity 3011.

[0040] A trigger rod c3047 extends from one side of the connecting rod 3046, parallel to the moving direction of the moving mold base 300. The end of the trigger rod c3047 extends out of the moving mold base 300, and the distance between it and the fixed bracket 400 is h5. When the trigger rod c3047 moves closer to the fixed mold 201, it moves along with the demolding rod 3045, causing the side mold pillar 3041 to move away from the mold cavity 3011. As a result, during the process of the protrusion 3043 leaving the side opening 3012, the moving distance of the trigger rod c3047 is h6, and the sum of h5 and h6 is greater than h3. In other words, during the demolding process of the hole 101 of the speaker bracket 100, the trigger rod c3047 contacts the fixed bracket 400. With the moving mold base 300 as a reference, the trigger rod c3047 moves forward and pushes against the side mold pillar 3041, causing it to retract, thereby causing the protrusion 3043 to leave the side opening 3012. Then, through the cooperation of the top seat 319 and the ejector pin 320, the speaker bracket 100 is further demolded.

[0041] Third, in this case, initially, the side of nut 311 facing the moving mold base 300 is in contact with the fixed bracket 400. Therefore, with the cooperation of the two, the retraction movement of inner mold base 302 away from mold cavity 3011 can be restricted. That is to say, during the injection molding process, the positive pressure environment in mold cavity 3011 will exert a retraction force on inner mold base 302. However, due to the cooperation of nut 311 and fixed bracket 400, the retraction of inner mold base 302 is restricted. Therefore, initially, the cooperation of nut 311 and fixed bracket 400 realizes the locking of inner mold base 302.

[0042] Furthermore, refer to Figure 9 A convex ring 3022 is provided on one side of the inner mold base 302, and an insert block 3044 is provided on one side of the side mold pillar 3041. Initially, the insert block 3044 is inserted into the convex ring 3022 and the insertion direction of the insert block 3044 is parallel to the moving direction of the moving mold base 300. During the injection molding process, the positive pressure environment in the mold cavity 3011 will apply a backward force to the side mold pillar 3041. Since the insert block 3044 is inserted into the convex ring 3022, the two work together to restrict the backward movement of the side mold pillar 3041, that is, to achieve mold locking of the side mold pillar 3041 during the injection molding process. During demolding, as the demolding of the hole 101 of the speaker bracket 100 is completed, the inner mold base 302 will move, which will cause the insert block 3044 to leave the convex ring 3022. After that, the demolding of the hole 101 of the speaker bracket 100 continues. At the same time, the side mold pillar 3041 also begins the demolding action of causing the protrusion 3043 to leave the side opening 3012.

[0043] Working principle of the invention: Step 1: During the mold opening process of the moving mold base 300, the ejector component 303 moves together with the moving mold base 300; When the nut 311 contacts the fixed bracket 400, the moving mold base 300 continues to move with the gear 306, and through the cooperation of the gear 306 and the rack 307, it drives the inner mold base 302 and the protruding pin 3021 to retract. Step 2: When the inner mold base 302 moves and the insert block 3044 leaves the convex ring 3022, the trigger rod c3047 contacts the fixed bracket 400, and the moving mold base 300 continues to move. With the moving mold base 300 as a reference, the trigger rod c3047 moves forward and pushes against the side mold column 3041, causing it to retract, thereby causing the protrusion 3043 to leave the side opening 3012. Step 3: When the end of the protruding pin 3021 is flush with the bottom of the cavity 3011, the rack 307 connected to the inner mold base 302 will contact the side wall of the mounting area. At this time, the gear 306, rack 307 and guide sleeve 308 are equivalent to one unit, and the trigger rod b312 contacts the fixed bracket 400. As the moving mold base 300 continues to move, spring a310 is compressed. At this time, since the spring force coefficient of spring b316 is much greater than that of spring c317, the moving distance of the main plate b314 is very small and negligible. It can be regarded as the main plate b314 being stationary. That is, the top shaft 318 and the top plate 319 are stationary. With the moving mold base 300 as the reference, it is equivalent to the top plate 319 moving forward and pushing the product in the mold cavity 3011. At the same time, the inner mold base 302 moves together with the moving mold base 300. Step 4: When the product is ejected from the mold cavity 3011 by the top seat 319, the inner mold seat 302 contacts the main board b314. At this time, the product is only in contact with the surface of the top seat 319. Subsequently, as the moving mold base 300 continues to move, it pushes the main board b314 to move together through the inner mold base 302. The spring b316 is compressed, which means that with the top seat 319 as a reference, the ejector pin 320 moves forward and pushes the product, ejecting the product from the top seat 319.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An injection mold for a speaker bracket, comprising a fixed mold base (200), a movable mold base (300), a fixed mold (201) disposed on the fixed mold base (200), and a movable mold (301) disposed on the movable mold base (300), characterized in that, The moving mold (301) has a mold cavity (3011) on the side facing the fixed mold (201). The moving mold (301) also has an installation area on the side of the mold cavity (3011) away from the fixed mold (201). An inner mold base (302) is installed in the installation area. The moving direction of the inner mold base (302) is parallel to the moving direction of the moving mold base (300). Several protrusions (3021) are arranged in an array on one side of the inner mold base (302). The ends of the protrusions (3021) extend into the mold cavity (3011). The mounting area is arrayed with several ejection units. Each ejection unit includes an ejection groove located at the bottom of the mold cavity (3011) and a top seat (319) located in the ejection groove. Initially, one end of the top seat (319) is flush with the opening of the ejection groove. The other end of the top seat (319) extends into a hollow shaft (318). The end of the top shaft (318) extends into the mounting area. The end face of the top seat (319) is provided with a top hole communicating with the top shaft (318). A ejector pin (320) is sleeved inside the top shaft (318). One end of the ejector pin (320) extends into the mounting area and the other end is located in the top hole. During demolding, the protrusion (3021) first leaves the hole (101) of the speaker bracket (100), then pushes the speaker bracket (100) away from the mold cavity (3011) through the top seat (319), and finally pushes the speaker bracket (100) away from the top seat (319) through the ejector pin (320).

2. The speaker bracket injection mold according to claim 1, characterized in that, A support (305) is provided in the installation area. A gear (306) is installed on the support (305). A rack (307) meshes with both sides of the gear (306). The extension direction of the rack (307) is parallel to the movement direction of the moving mold base (300). One rack (307) is connected to the inner mold base (302), and the other rack (307) is connected to a guide sleeve (308) at the end away from the mold cavity (3011). The guide sleeve (308) is fitted with a slider and a spring a (310), and the spring a (310) is located on the side of the slider facing the mold cavity (3011). The side of the slider away from the mold cavity (3011) has a trigger rod a (309) extending out of the moving mold (301).

3. The speaker bracket injection mold according to claim 2, characterized in that, A guide rod (315) is provided in the installation area, and the guiding direction of the guide rod (315) is parallel to the moving direction of the moving mold base (300); Main board a (313) and main board b (314) are slidably mounted on the guide rod (315), and main board a (313) is located on the side of main board b (314) away from the mold cavity (3011); The guide rod (315) is also fitted with spring b (316) and spring c (317), with spring b (316) located between main plate a (313) and main plate b (314), and spring c (317) located on the side of main plate b (314) facing the mold cavity (3011). The elastic coefficient of spring b (316) is greater than that of spring c (317). The top shaft (318) is connected to the motherboard b (314), and the ejector pin (320) is connected to the motherboard a (313).

4. The speaker bracket injection mold according to claim 3, characterized in that, A fixed bracket (400) is provided on the side of the moving mold base (300) away from the fixed mold base (200). During the process of the ejector assembly (303) moving together with the mold opening action of the moving mold base (300), when the end of the trigger rod a (309) contacts the fixed bracket (400), the moving distance of the trigger rod a (309) is h1, the distance between the end of the protrusion (3021) and the bottom of the mold cavity (3011) is h2, the distance between the end of the trigger rod b (312) and the fixed bracket (400) is h3, the distance between the end of the rack (307) connected to the inner mold base (302) away from the mold cavity (3011) and the side of the mounting area away from the mold cavity (3011) is h4, h2 equals h4, and the sum of h1 and h2 equals h3.

5. The speaker bracket injection mold according to claim 3, characterized in that, The end of the trigger rod a (309) is provided with a nut (311), and initially, the nut (311) is in contact with the fixed bracket (400) on the side facing the moving mold base (300).

6. The speaker bracket injection mold according to claim 4, characterized in that, The mold cavity (3011) is provided with side mounting grooves on both sides along the width direction. The mold cavity (3011) and the side mounting grooves are connected through side openings (3012). A side mold assembly (304) is provided in the side mounting groove. The side mold assembly (304) includes a side mold post (3041), the side mold post (3041) moves in a direction perpendicular to the moving mold base (300), and a protrusion (3043) extends from one side of the side mold post (3041), the end of the protrusion (3043) passes through the side opening (3012) and extends into the mold cavity (3011).

7. The speaker bracket injection mold according to claim 6, characterized in that, A spring d (3042) is provided between the side mold post (3041) and the side mounting groove. The elastic force of the spring d (3042) drives the side mold post (3041) to approach the mold cavity (3011). A demolding rod (3045) parallel to the moving direction of the moving mold base (300) is provided in the side mounting groove. One end of the demolding rod (3045) extends into the mounting area and is provided with a connecting rod (3046), and the other end is provided with an inclined surface. When the demolding rod (3045) moves closer to the fixed mold (201), the inclined surface of the demolding rod (3045) contacts the side mold pillar (3041) and pushes the side mold pillar (3041) away from the mold cavity (3011).

8. The speaker bracket injection mold according to claim 7, characterized in that, A trigger rod c (3047) extends from one side of the connecting rod (3046) parallel to the moving direction of the moving mold base (300). The end of the trigger rod c (3047) extends out of the moving mold base (300) and the distance between it and the fixed bracket (400) is h5. The trigger rod c (3047) moves closer to the fixed mold (201) and moves along with the demolding rod (3045), causing the side mold pillar (3041) to move away from the mold cavity (3011). As a result, the protrusion (3043) moves away from the side opening (3012), and the moving distance of the trigger rod c (3047) is h6. The sum of h5 and h6 is greater than h3.

9. The speaker bracket injection mold according to claim 7, characterized in that, A protruding ring (3022) is provided on one side of the inner mold base (302), and an insert (3044) is provided on one side of the side mold column (3041). Initially, the insert (3044) is inserted into the protruding ring (3022), and the insertion direction of the insert (3044) is parallel to the moving direction of the moving mold base (300).

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