Mold structure for improving appearance near through hole and sound panel

Abstract

The utility model provides a mould structure and a sound panel for improving the appearance near a through hole, the mould structure comprises a front mould core, a rear mould core and a product cavity arranged between the front mould core and the rear mould core, and further comprises a hot runner structure communicated with the product cavity, the product cavity comprises an upper mould cavity surface and a lower mould cavity surface, a boss structure is arranged on the lower die cavity surface, a plane is arranged in the middle of the boss structure and abuts against the upper die cavity surface, the boss structure further comprises a first slope surface and a second slope surface, the second slope surface is arranged on the lower die cavity surface, the first slope surface is arranged in the middle of the second slope surface, and the second slope surface is arranged in the middle of the second slope surface. The plane is arranged in the middle of the first slope face, the second slope face, the first slope face and the plane are sequentially stacked to form a boss structure protruding out of the lower die cavity face, and the gradient of the first slope face is larger than that of the second slope face. According to the utility model, the appearance and strength near the through hole are effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of die structures, in particular to a die structure for improving the appearance near a through hole, and also relates to an audio panel processed by using the die structure. Background Art

[0002] The audio panel is generally injection molded by a die. When processing near the through hole, due to the obstruction of the columnar body of the through hole structure, the molten plastic flows slowly near the through hole. In order to make the glue guiding smoother and the fluidity better, usually the flow rate is increased by increasing the pressure. However, when the pressure increases, pressure marks will inevitably be generated, thus affecting the appearance of the product.

[0003] In addition, in order to reduce the stress marks, a thinning design is made near the through hole. However, the existing thinning design is an arc surface concentric with the through hole, and the angle at the top of the arc surface gradually decreases as the height increases. Although there is a certain improvement in the stress marks compared with the columnar structure, the arc surface is also not conducive to flow guiding. Therefore, it is necessary to further improve. Summary of the Utility Model

[0004] To solve the problems in the prior art, the utility model provides a die structure for improving the appearance near a through hole, and also provides an audio panel using the die structure for improving the appearance near the through hole.

[0005] The die structure of the utility model for improving the appearance near the through hole includes a front die core, a rear die core and a product cavity arranged between the front die core and the rear die core, and further includes a hot runner structure communicated with the product cavity. The product cavity includes an upper die cavity surface with a smooth top surface and a lower die cavity surface with a bottom functional structure. Among them, a boss structure is arranged on the lower die cavity surface, a plane is arranged in the middle of the boss structure, and the plane abuts against the upper die cavity surface. The boss structure further includes a first slope surface and a second slope surface. Among them, the second slope surface is arranged on the lower die cavity surface, the first slope surface is arranged in the middle of the second slope surface, the plane is arranged in the middle of the first slope surface, and the second slope surface, the first slope surface and the plane are stacked in sequence to form a boss structure protruding from the lower die cavity surface. The slope of the first slope surface is greater than that of the second slope surface.

[0006] Further, the shape of the plane corresponding to the through hole is circular, and the overall shapes of the first slope surface and the second slope surface are oval or oblong, and both ends of the oval or oblong extend in the vertical direction of the injection direction.

[0007] Further, it also includes a vertical surface for strengthening the strength of the through hole of the audio panel and retaining a certain thickness. The vertical surface encloses the plane and is perpendicular to the plane.

[0008] Further, a disc-shaped protrusion facing the lower mold cavity surface is provided on the upper mold cavity surface. The vertical surface is an arc surface provided on the side surface of the disc-shaped protrusion, and the upper surface of the disc-shaped protrusion is adapted to the plane.

[0009] Further, the vertical surface is a vertical arc surface with the same cross-sectional shape and size as the plane, provided in the middle of the first ramp surface on the lower mold cavity surface, and the plane is provided on the upper surface of the vertical surface.

[0010] Further, it also includes a plate A provided above the front mold core and a heat insulation plate provided between the plate A and the front mold core. Several temperature zones are provided on the surface of the front mold core away from the rear mold core, and ribs are provided between the temperature zones. Grooves corresponding to the ribs are provided on the heat insulation plate, and the lower surface of the heat insulation plate is limited and attached to the bottom surfaces of the respective temperature zones through the rib and groove structure.

[0011] Further, heating and cooling channels are provided on the front mold core, and the heating and cooling channels are evenly distributed on each temperature zone.

[0012] Further, a speaker mounting hole is provided in the middle of the sound panel, the through hole is provided near the speaker mounting hole, and processing structures for processing the positioning hole strengthening structure of the sound panel are further provided on both sides in the vertical direction of the connection line between the center of the plane of the boss structure and the center of the speaker mounting hole.

[0013] Further, the processing structure includes limit post grooves symmetrically provided on both sides of the boss structure and rib grooves communicating with the limit post grooves.

[0014] The present utility model also provides a sound panel processed by using the mold structure. The sound panel includes a panel body and a through hole provided on the panel body. A thinning structure connected to the panel body is provided around the through hole. The thinning structure includes a third ramp surface and a fourth ramp surface. The third ramp surface matches the first ramp surface, and the fourth ramp surface matches the second ramp surface.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: By providing a boss structure near the through hole processing structure and setting the plane forming the through hole on the top of the boss structure, during injection molding, the molten state can be guided by the first ramp surface and the second ramp surface, which can accelerate the flow of the molten state, thereby effectively improving the appearance near the through hole.

[0016] By setting the slope of the first ramp surface to be greater than the slope of the second ramp surface, during the flow of the molten state, the flow rate of the molten state is further accelerated, avoiding the problem of layered appearance caused by the slow flow of the molten state during injection molding. Description of the Drawings

[0017] To more clearly illustrate the solutions in the present utility model or the prior art, the following will briefly introduce the attached drawings required for use in the description of the embodiments or the prior art. Obviously, the attached drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other attached drawings can also be obtained based on these attached drawings.

[0018] Figure 1 Structural schematic diagram of the present utility model;

[0019] Figure 2 Principle block diagram of the disassembled structure of the present utility model;

[0020] Figure 3 Schematic diagram of the disassembled structure from another angle;

[0021] Figure 4 Schematic diagram of the structure of the rear mold core;

[0022] Figure 5 Partial enlarged view of the boss structure part. Specific implementation manners

[0023] Unless otherwise defined, all technical and scientific terms used in the present utility model have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs; the terms used in the description of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model; the terms "including" and "having" and any variations thereof in the description and claims of the present utility model and the above attached drawing descriptions are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the description and claims of the present utility model or the above attached drawings are used to distinguish different objects and are not used to describe a specific order.

[0024] Referring to "embodiments" in the present utility model means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present utility model. The appearance of this phrase at various positions in the description does not necessarily refer to the same embodiment, nor is it an exclusive, independent or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described in the present utility model can be combined with other embodiments.

[0025] To enable those skilled in the technical field to better understand the solutions of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the attached drawings.

[0026] Such as Figures 1 - 5As shown in the figure, the mold structure of the present utility model for improving the appearance near the through hole includes a front mold core 200, a rear mold core 300, and a product cavity disposed between the front mold core and the rear mold core. It further includes a hot runner structure communicated with the product cavity. The product cavity includes an upper mold cavity surface 203 with a smooth top surface and a lower mold cavity surface 301 with a bottom functional structure. The hot runner structure includes a runner disposed through a hot runner hole 600, a hot nozzle (not shown in the figure) communicated with the runner, and a deflector 302 communicated with the hot nozzle. The deflector 302 is disposed on the rear mold core, and an installation groove 205 matching the deflector 302 is provided on the front mold core 200.

[0027] In this example, the lower mold cavity surface 301 is provided with a boss structure 3011. A plane 30113 is provided in the middle of the boss structure 3011. The plane 30113 abuts against the upper mold cavity surface 203. The boss structure 3011 further includes a first slope surface 30112 and a second slope surface 30111. Among them, the second slope surface 30111 is provided on the lower mold cavity surface 301, the first slope surface 30112 is provided in the middle of the second slope surface 30111, the plane 30113 is provided in the middle of the first slope surface 30112. The second slope surface 30111, the first slope surface 30112, and the plane 30113 are stacked in sequence to form the boss structure 3011 protruding from the lower mold cavity surface 301. The slope of the first slope surface 30112 is greater than that of the second slope surface 30111.

[0028] By providing a boss structure 3011 near the through hole processing structure and disposing the plane 30113 forming the through hole at the top of the boss structure 3011, during injection molding, when the same volume of molten state flows through the boss structure, the molten material can be guided by the second slope surface 30111 and the first slope surface 30112 and quickly flow around the plane, thereby accelerating the flow of the molten state and preventing the phenomenon of slow flow and layering, effectively improving the appearance near the through hole.

[0029] Preferably, by setting the slope of the first slope surface 30112 to be greater than that of the second slope surface 30111, when the molten state flows, the flow rate of the molten state reaching the plane 30113 flowing downward is further accelerated.

[0030] Preferably, the material in this example flows out from around the flow guide member in the middle, and the flow direction is from both sides to the midline in the length direction. Therefore, when the shape of the plane 30113 corresponding to the through hole is circular, in this example, the overall shapes of the first inclined surface 30112 and the second inclined surface 30111 are creatively oval or oblong, and both ends of the oval or oblong extend in the width direction of the product cavity. By reducing the slope with the lower mold cavity surface 301 plane, the material can be more easily transferred to the periphery of the plane 30113. The material flowing through the periphery of the plane 30113 can be effectively accelerated near the plane 30113 under the guidance of a large slope with a short diameter, thus effectively avoiding the appearance surface delamination marks caused by the slow flow of the molten material.

[0031] In order to process a through hole with a certain thickness in this example, a vertical surface is also provided. The height of the vertical surface corresponds to the thickness of the through hole. A disc-shaped protrusion 204 facing the lower mold cavity surface 301 is provided on the upper mold cavity surface 203 of this example. The vertical surface is an arc surface provided on the side of the disc-shaped protrusion 204. The upper surface of the disc-shaped protrusion 204 is adapted to the plane 30113. When the mold is closed, the upper surface of the disc-shaped protrusion 204 presses and fits the plane 30113.

[0032] As another embodiment of the present invention, in this example, a vertical surface perpendicular to the plane 30113 and enclosing the plane 30113 can also be provided between the plane 30113 and the first inclined surface 30112.

[0033] Such as Figure 4 and Figure 5 As shown, the product processed in this example is a speaker panel. The through hole in this example is a functional hole. The non-injection area where the middle flow guide member is located corresponds to the speaker mounting hole in the middle of the speaker panel. The through hole is arranged near the speaker mounting hole. Four fixing post processing grooves 3013 for mounting the speaker are also provided around the speaker mounting hole. Processing structures 3012 for processing the positioning hole strengthening structure of the speaker panel are also provided on both sides in the direction perpendicular to the connection line between the center of the plane of the boss structure 3011 and the center of the speaker mounting hole.

[0034] The processing structure 3012 in this example includes limit post grooves 30121 symmetrically arranged on both sides of the boss structure 3011 and reinforcing rib grooves 30122 communicated with the limit post grooves 30121. This is a functional structure formed on the back of the speaker panel and will not be elaborated here.

[0035] Such as Figures 1 - 3As shown in the figure, in this example, in order to prevent premature cooling and shaping of the molten material during the flow process, which may affect the flow of the molten material, a heating and cooling channel 400 for arranging heating pipes and cooling pipes is provided on the front mold core 200. The heating and cooling channels 400 are arranged at intervals in sequence along the shape of the sound panel, and the distances from all the heating pipes to the upper mold cavity surface 203 are equal, and the distances from all the cooling pipes to the upper mold cavity surface 203 are equal. Thus, the mold temperature balance of the product cavity can be effectively achieved, so that the appearance of the formed material is smoother and there are no stress marks. Moreover, it can prevent the warping and deformation of the product caused by uneven mold temperature.

[0036] Preferably, in order to prevent heat loss, a heat insulation plate 500 is provided on the side of the A plate 100 close to the front mold core 200. Several temperature zones 201 are provided on the surface of the front mold core away from the rear mold core, and reinforcing ribs 202 are provided between the respective temperature zones 201. Grooves corresponding to the reinforcing ribs are provided on the heat insulation plate 500, and the grooves also divide the heat insulation plate 500 into heat insulation units 501. Through the limiting of the reinforcing ribs 202 and the groove structure, the lower surface of the heat insulation plate 500 is made to fit the bottom surfaces of the respective temperature zones.

[0037] The product processed by the mold structure in this example can be any article including a through-hole structure. In this example, it is a sound panel, corresponding to the product cavity structure. The sound panel includes a panel body and through-holes provided on the panel body. A thinning structure connected to the panel body is provided around the through-holes. The thinning structure includes a third inclined surface and a fourth inclined surface. The structure of the third inclined surface matches that of the first inclined surface 30112, and the structure of the fourth inclined surface matches that of the second inclined surface 30111.

[0038] The above-described specific embodiments are the preferred embodiments of the present invention, and do not limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to this specific embodiment. All equivalent changes made in accordance with the present invention are within the protection scope of the present invention.

Claims

1. A mold structure for improving the appearance near a through hole, comprising a front mold core, a rear mold core, and a product cavity disposed between the front mold core and the rear mold core, and also comprising a hot runner structure connected to the product cavity, characterized in that: The product cavity comprises an upper cavity surface with a smooth top surface and a lower cavity surface with a functional structure on the bottom surface, wherein: The lower mold cavity surface is provided with a boss structure, the middle of the boss structure is provided with a plane, and the plane abuts against the upper mold cavity surface. The boss structure further includes a first slope surface and a second slope surface, wherein the second slope surface is arranged on the lower mold cavity surface, the first slope surface is arranged in the middle of the second slope surface, the plane is arranged in the middle of the first slope surface, and the second slope surface, the first slope surface, and the plane are stacked in sequence to form a boss structure protruding from the lower mold cavity surface. The slope of the first slope surface is greater than the slope of the second slope surface.

2. The mold structure for improving the appearance near the through hole according to claim 1, characterized in that: The shape of the plane corresponding to the through hole is circular, and the overall shape of the first slope surface and the second slope surface is elliptical or oblong, with both ends of the ellipse or oblong extending in a direction perpendicular to the glue injection direction.

3. The mold structure for improving the appearance near the through hole according to claim 1, characterized in that: The method also includes strengthening the strength of the through hole so that the through hole retains a vertical surface of a certain thickness, wherein the vertical surface surrounds the plane and is arranged perpendicular to the plane.

4. The mold structure for improving the appearance near the through hole according to claim 3, characterized in that: The upper mold cavity surface is provided with a disc-shaped protrusion facing the lower mold cavity surface, the vertical surface is arranged on the side of the disc-shaped protrusion and is an arc surface, and the upper surface of the disc-shaped protrusion is adapted to the plane.

5. The mold structure for improving the appearance near the through hole according to claim 3, characterized in that: The vertical surface is a vertical arc surface arranged in the middle of the first slope surface on the lower mold cavity surface, and the cross-sectional shape and size of the vertical arc surface are consistent with the plane, and the plane is arranged on the upper surface of the vertical surface.

6. The mold structure for improving the appearance near the through hole according to any one of claims 1 to 5, characterized in that: It also includes an A plate arranged above the front mold core and an insulation plate arranged between the A plate and the front mold core. The front mold core is provided with a plurality of temperature zones on a side away from the rear mold core. Reinforcing ribs are provided between each temperature zone. The insulation plate is provided with grooves corresponding to the reinforcing ribs. The lower surface of the insulation plate is limited by the reinforcing ribs and the groove structure and is arranged to fit the bottom surface of each temperature zone.

7. The mold structure for improving the appearance near the through hole according to claim 6, characterized in that: The front mold core is provided with heating and cooling channels, and the heating and cooling channels are evenly distributed in each temperature zone.

8. The mold structure for improving the appearance near the through hole according to any one of claims 1 to 5, characterized in that: A speaker mounting hole is provided in the middle of the audio panel, the through hole is provided near the speaker mounting hole, and processing structures for processing the audio panel positioning hole reinforcement structure are provided on both sides of the vertical direction of the line connecting the center of the boss structure plane and the center of the speaker mounting hole.

9. The mold structure for improving the appearance near the through hole according to claim 8, characterized in that: The processing structure includes limiting column grooves symmetrically arranged on both sides of the boss structure and reinforcing rib grooves connected to the limiting column grooves.

10. An audio panel, characterized in that: The audio panel is processed by the mold structure described in any one of claims 1 to 9, and the audio panel includes a panel body and a through hole arranged on the panel body, a thinning structure connected to the panel body is arranged around the through hole, and the thinning structure includes a third slope surface and a fourth slope surface, the third slope surface matches the first slope surface, and the fourth slope surface matches the second slope surface.

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