Earphone shell injection mold

Abstract

The utility model relates to an earphone shell injection mold. The earphone shell injection mold comprises an injection molding module, a base and a jacking assembly, an injection molding cavity and an injection molding channel communicating with the injection molding cavity are formed in the injection molding module, and the injection molding module comprises an upper mold and a lower mold. The upper die, the lower die and the base are sequentially arranged from top to bottom. The jacking assembly drives the upper die and the lower die to move together in the first section stroke, drives the upper die to move in the second section stroke, and is a continuous movement stroke in the first section stroke and the second section stroke. Firstly, the jacking assembly is in the first section stroke, the jacking assembly drives the upper mold and the lower mold to ascend together, then the jacking assembly enters the second section stroke, at the moment, the jacking assembly drives the upper mold to ascend, demolding is conducted through two times of ejection, when the jacking assembly enters the second section stroke from the first section stroke, the lower mold stops moving, the upper mold continues to ascend, and in other words, demolding is conducted through two times of ejection. And at the moment, the lower die retreats relative to the upper die, so that the inverted buckle of the product can be better protected, and the size of the product is more stable.

Description

Technical Field

[0001] This utility model relates to the technical field of molds, and in particular to an injection mold for an earphone shell. Background Technology

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of injection molding include high production speed and efficiency, automated operation, a wide variety of designs and shapes (from simple to complex), and sizes ranging from large to small. It also produces dimensionally accurate products, facilitates product updates and replacements, and can create complex shapes. Injection molding is suitable for mass production and molding processes involving complex shapes.

[0003] Existing injection molded products (such as headphone shells) have undercuts. Currently, these products with undercuts are generally demolded by ejecting the undercuts in one go, which can easily lead to unstable product dimensions or even damage to the undercuts, affecting product quality. Utility Model Content

[0004] The purpose of this utility model is to provide an injection mold for headphone shells, which aims to solve the technical problem that the existing injection molds, which use a one-time ejection method for demolding and undercutting, result in unstable product dimensions and are prone to damage to the undercutting.

[0005] To solve the above technical problems, an injection mold for an earphone shell is provided, comprising:

[0006] An injection molding module is formed with an injection cavity and an injection channel communicating with the injection cavity. The injection molding module includes an upper mold and a lower mold.

[0007] The base, the upper mold, the lower mold, and the base are arranged sequentially from top to bottom;

[0008] The lifting assembly drives the upper mold and the lower mold to move together in the first segment, and drives the upper mold to move in the second segment. The lifting assembly has a continuous movement stroke in the first segment and the second segment.

[0009] Furthermore, the lifting assembly includes a push rod and a locking member that cooperates with the push rod. The push rod is slidably installed on the lower mold and acts on the upper mold, and the locking member acts on the lower mold.

[0010] Furthermore, the lifting assembly also includes a driving component, which drives the push rod to move along a first direction, and the push rod drives the locking component to move along a second direction, wherein the first direction and the second direction are perpendicular to each other.

[0011] Furthermore, the lifting assembly also includes a locking block, which is fixedly installed on the base, and the locking fastener is disposed between the push rod and the locking block.

[0012] Furthermore, the push rod includes an abutment portion that cooperates with the locking member, and the locking block includes a sliding plane and an avoidance slope, wherein the sliding plane is connected to the avoidance slope.

[0013] Furthermore, the locking element includes a first inclined surface and a second inclined surface, the first inclined surface cooperating with the abutting portion, and the second inclined surface cooperating with the avoidance inclined surface.

[0014] Furthermore, the push rod, the locking fastener, and the locking block are arranged in sequence.

[0015] Furthermore, the lifting assembly also includes a limiting component, which includes a limiting block and a first limiting post. The first limiting post is connected to the limiting block, and the locking fastener includes a limiting groove that cooperates with the first limiting post.

[0016] Furthermore, the limiting component also includes a second limiting post, which is connected to the limiting block and abuts against the side of the locking member.

[0017] Furthermore, the injection mold also includes a pressure locking assembly, which includes a first locking member and a second locking member. The first locking member is connected to the base, and the second locking member is connected to the lower mold. The first locking member and the second locking member cooperate to fix the injection module on the base.

[0018] Implementing the embodiments of this utility model will have the following beneficial effects:

[0019] In this embodiment, the headphone shell injection mold has a lifting component. When ejecting the injection molded product, the lifting component first drives the upper and lower molds to rise together in the first stage. Then, the lifting component enters the second stage, where it drives the upper mold to rise. Demolding is achieved through two ejections. When the lifting component moves from the first stage to the second stage, the lower mold stops moving, while the upper mold continues to rise. In other words, the lower mold moves backward relative to the upper mold, which better protects the product undercut and makes the product dimensions more stable. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the headphone shell injection mold according to an embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional view of the headphone shell injection mold described in an embodiment of the present utility model.

[0023] Figure 3 This is a cross-sectional view of the headphone shell injection mold described in this embodiment of the utility model from another perspective;

[0024] Figure 4 This is a schematic diagram of the lifting assembly described in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the lifting assembly after removing the push rod according to an embodiment of the present invention;

[0026] Figure 6 This is a front view of the lifting assembly described in this embodiment of the present invention after removing the push rod.

[0027] Wherein: 100, headphone shell injection mold; 110, injection module; 111, upper mold; 112, lower mold; 113, injection cavity; 114, injection channel; 120, base; 130, lifting assembly; 131, push rod; 1311, abutment part; 132, locking fastener; 1321, first inclined surface; 1322, second inclined surface; 1323, limiting groove; 133, locking block; 1331, sliding plane; 1332, clearance inclined surface; 134, limiting component; 1341, limiting block; 1342, first limiting post; 1343, second limiting post; 140, pressure lock assembly; 141, first locking element; 142, second locking element. Detailed Implementation

[0028] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0029] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] The injection mold of this application is used to produce headphone shells. Because the headphone shells have undercuts, in existing technologies, demolding is done via a single ejection, which can easily lead to dimensional instability in the product and even damage to the undercuts. Therefore, to solve the above problems, the injection mold of this application uses a two-stage ejection structure to eject the injection-molded product.

[0032] Please refer to Figures 1-6 This utility model provides an injection mold 100 for an earphone shell, comprising an injection module 110, a base 120, and a lifting assembly 130. The injection module 110 forms an injection cavity 113 and an injection channel 114 communicating with the injection cavity 113. The injection module 110 includes an upper mold 111 and a lower mold 112. The upper mold 111, lower mold 112, and base 120 are arranged sequentially from top to bottom. In a first stroke, the lifting assembly 130 drives the upper mold 111 and lower mold 112 to move together; in a second stroke, the lifting assembly 130 drives the upper mold 111 to move. The lifting assembly 130 performs a continuous stroke in both the first and second strokes. Exemplarily, the injection cavity 113 is a hollow space in the mold used to form the product's shape, and its shape and size are consistent with the final injection-molded product. During injection molding, molten plastic material is injected into the injection cavity 113, where it cools and solidifies to form a product that matches the shape of the cavity. The injection channel 114 connects the injection molding machine and the injection cavity 113, conveying molten plastic material from the machine into the cavity. Furthermore, it should be noted that the lifting assembly 130 moves continuously throughout the demolding process, rather than stopping and starting in stages. This continuity helps improve demolding efficiency and stability.

[0033] In this embodiment, the headphone shell injection mold 100 is equipped with a lifting component 130. When the injection mold ejects the injection molded product, in the first stage, the lifting component 130 drives the upper mold 111 and the lower mold 112 to rise together. Then, the lifting component 130 enters the second stage, at which time the lifting component 130 drives the upper mold 111 to rise. Demolding is achieved through two ejections. When the lifting component 130 enters the second stage from the first stage, the lower mold 112 stops moving, while the upper mold 111 continues to rise. That is to say, at this time, the lower mold 112 is retracted relative to the upper mold 111, which can better protect the product undercut and make the product size more stable.

[0034] The injection mold of this application, through segmented control of the movement of the upper mold 111 and the lower mold 112, can better protect the undercut portion of the product during demolding. In the first stage, the upper mold 111 and the lower mold 112 move together, avoiding excessive stress on the product; in the second stage, the lower mold 112 stops moving while the upper mold 111 continues to rise, causing the lower mold 112 to retract relative to the upper mold 111, thereby better protecting the undercut portion of the product and reducing product damage caused by improper demolding. Furthermore, due to the continuous stroke and segmented control of the lifting assembly 130, the stress distribution on the product during demolding is more uniform, reducing dimensional deviations caused by stress concentration, thereby improving the dimensional accuracy and consistency of the product.

[0035] Please refer to Figure 4 , Figure 5 and Figure 6 In one possible implementation, the lifting assembly 130 includes a push rod 131 and a locking member 132 cooperating with the push rod 131. The push rod 131 is slidably mounted on the lower mold 112 and acts on the upper mold 111, while the locking member 132 acts on the lower mold 112. Exemplarily, the push rod 131 acts directly on the upper mold 111, used to push the upper mold 111 upwards independently. The upward movement of the push rod 131 causes the locking member 132 to rise, and the locking member 132 causes both the lower mold 112 and the upper mold 111 to rise. It should be noted that in the first stage, the push rod 131 and the locking member 132 abut against each other, thereby enabling the locking member 132 to rise. In the second stage, the abutment between the push rod 131 and the locking member 132 is released, and at this time, the upward movement of the push rod 131 cannot cause the locking member 132 to rise.

[0036] Please refer to Figure 4 , Figure 5 and Figure 6In one possible implementation, the lifting assembly 130 further includes a driving member (not shown in the figure). The driving member drives the push rod 131 to move along a first direction, and the push rod 131 drives the locking member 132 to move along a second direction, with the first and second directions being perpendicular to each other. For example, the first direction is vertical, and the second direction is horizontal. It should also be noted that during the first segment, the push rod 131 moves along the first direction, and the locking member 132 does not move. During the transition from the first segment to the second segment, the push rod 131 continues to move upward along the first direction, pushing the locking member 132 to move along the second direction, thereby disengaging the connection between the push rod 131 and the locking member 132. Afterward, only the push rod 131 alone pushes the upper mold 111 to lift. In this embodiment, the driving member is a cylinder or a telescopic motor.

[0037] Please refer to Figure 4 , Figure 5 and Figure 6 In one possible implementation, the lifting assembly 130 further includes a locking block 133, which is fixedly mounted on the base 120, and a locking member 132 is disposed between the push rod 131 and the locking block 133. Exemplarily, the locking block 133 controls the connection between the locking member 132 and the push rod 131, thereby achieving locking / unlocking between the locking member 132 and the push rod 131.

[0038] Please refer to Figure 4 , Figure 5 and Figure 6 In one possible implementation, the push rod 131 includes an abutment portion 1311 that mates with the locking member 132, and the locking block 133 includes a sliding plane 1331 and a clearance ramp 1332, with the sliding plane 1331 and the clearance ramp 1332 connected. Exemplarily, when the locking member 132 abuts against the sliding plane 1331, the locking member 132 is located within a first segment, and when the locking member 132 abuts against the clearance ramp 1332, it is in the process of switching from the first segment to the second segment; that is, at this time, the push rod 131 will push the locking member 132 to move in a second direction. The sliding plane 1331 and the clearance ramp 1332 can provide guidance for the movement of the locking member 132. During the movement of the lifting assembly 130, the contact surfaces of the locking member 132 and the locking block 133 cooperate with each other, allowing the locking member 132 to move along a predetermined trajectory. In the first stage, the locking element 132 contacts the sliding plane 1331 of the locking block 133, maintaining stable vertical movement; while during the transition from the first stage to the second stage, the locking element 132 contacts the clearance slope 1332 of the locking block 133, pushing the locking element 132 to move in the second direction, thereby releasing the connection between the push rod 131 and the locking element 132.

[0039] Please refer to Figure 4 , Figure 5 and Figure 6 In one possible implementation, the locking member 132 includes a first inclined surface 1321 and a second inclined surface 1322. The first inclined surface 1321 engages with the abutment portion 1311, and the second inclined surface 1322 engages with the clearance inclined surface 1332. For example, when the locking member 132 abuts against the sliding plane 1331, the first inclined surface 1321 engages with the abutment portion 1311, at which point the push rod 131 rises, causing the locking member 132 to rise as well. When the locking member 132 rises to the position of the clearance inclined surface 1332, the ground contact portion of the push rod 131 causes the locking member 132 to move in a second direction via the first inclined surface 1321.

[0040] Please refer to Figure 4 , Figure 5 and Figure 6 In one possible implementation, push rods 131, locking fasteners 132, and locking blocks 133 are arranged sequentially. Exemplarily, a lifting assembly 130 includes two push rods 131, two locking fasteners 132, and a locking block 133, wherein the locking block 133 is located in the middle, and two locking fasteners 132 and two push rods 131 are arranged sequentially on either side of the locking block 133. In this embodiment, two lifting assemblies 130 are provided, located on opposite sides of the injection molding module 110. Providing two lifting assemblies 130 allows the demolding force to be distributed across two areas, with each lifting assembly 130 bearing a portion of the demolding force, thereby making the demolding force more evenly distributed on the product.

[0041] Please refer to Figure 4 , Figure 5 and Figure 6 In one possible implementation, the lifting assembly 130 further includes a limiting component 134, which includes a limiting block 1341 and a first limiting post 1342. The first limiting post 1342 is connected to the limiting block 1341, and the locking member 132 includes a limiting groove 1323 that mates with the first limiting post 1342. Exemplarily, the first limiting post 1342 is cylindrical, and its interaction with the limiting groove 1323 on the locking member 132 precisely limits the movement distance of the locking member 132 during movement. When the locking member 132 moves to a position contacting the first limiting post 1342, the limiting groove 1323 abuts against the limiting post, preventing the locking member 132 from continuing to move, thereby ensuring that the locking member 132 moves within a predetermined range. Furthermore, the engagement of the first limiting post 1342 with the limiting groove 1323 prevents the locking member 132 from disengaging from the limiting component 134.

[0042] Please refer to Figure 4 , Figure 5 and Figure 6In one possible implementation, the limiting component 134 further includes a second limiting post 1343, which is connected to the limiting block 1341 and abuts against the side of the locking member 132. Exemplarily, the second limiting post 1343 is cylindrical, and four second limiting posts 1343 are provided, with two positioned on one side of the locking member 132 and the other two on the other side. By abutting against the side of the locking member 132, the second limiting posts 1343 effectively prevent lateral movement, ensuring that the locking member 132 maintains the correct posture and position during movement. The first limiting post 1342 and the second limiting post 1343 work together to limit the locking member 132 from different directions. The first limiting post 1342 mainly restricts the movement distance and end position of the locking element 132, while the second limiting post 1343 mainly restricts the lateral movement of the locking element 132 and maintains its direction of movement. This synergistic limiting effect ensures that the locking element 132 is fully constrained during movement, ensuring that it moves within a predetermined range according to the correct trajectory and posture, thereby improving the movement accuracy of the lifting assembly 130 and the reliability of the demolding process.

[0043] Please refer to Figure 1 In one possible implementation, the injection mold further includes a pressure locking assembly 140, which includes a first locking member 141 and a second locking member 142. The first locking member 141 is connected to the base 120, and the second locking member 142 is connected to the lower mold 112. The first locking member 141 and the second locking member 142 cooperate to fix the injection molding module 110 to the base 120. Exemplarily, after injection molding is completed, the driving member pushes the injection molding module 110. When the pushing force of the driving member reaches a certain level, the first locking member 141 and the second locking member 142 will separate, at which point the injection molding module 110 and the base 120 will separate. The pressure locking assembly 140 is provided to ensure that the injection molding module 110 and the base 120 are always connected during injection molding.

[0044] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An injection mold for an earphone shell, characterized in that, include: An injection molding module is formed with an injection cavity and an injection channel communicating with the injection cavity. The injection molding module includes an upper mold and a lower mold. The base, the upper mold, the lower mold, and the base are arranged sequentially from top to bottom; The lifting assembly drives the upper mold and the lower mold to move together in the first segment, and drives the upper mold to move in the second segment. The lifting assembly has a continuous stroke in the first segment and the second segment.

2. The headphone shell injection mold according to claim 1, characterized in that, The lifting assembly includes a push rod and a locking element that cooperates with the push rod. The push rod is slidably installed on the lower mold and acts on the upper mold, and the locking element acts on the lower mold.

3. The headphone shell injection mold according to claim 2, characterized in that, The lifting assembly also includes a driving component, which drives the push rod to move along a first direction, and the push rod drives the locking component to move along a second direction, wherein the first direction and the second direction are perpendicular to each other.

4. The headphone shell injection mold according to claim 2, characterized in that, The lifting assembly also includes a locking block, which is fixedly installed on the base, and the locking fastener is disposed between the push rod and the locking block.

5. The headphone shell injection mold according to claim 4, characterized in that, The push rod includes an abutting portion that cooperates with the locking member, and the locking block includes a sliding plane and an avoidance slope, wherein the sliding plane is connected to the avoidance slope.

6. The headphone shell injection mold according to claim 5, characterized in that, The locking element includes a first inclined surface and a second inclined surface, the first inclined surface cooperating with the abutting portion, and the second inclined surface cooperating with the avoidance inclined surface.

7. The headphone shell injection mold according to claim 4, characterized in that, The push rod, the locking fastener, and the locking block are arranged in sequence.

8. The headphone shell injection mold according to claim 2, characterized in that, The lifting assembly further includes a limiting component, which includes a limiting block and a first limiting post. The first limiting post is connected to the limiting block, and the locking fastener includes a limiting groove that cooperates with the first limiting post.

9. The headphone shell injection mold according to claim 8, characterized in that, The limiting component further includes a second limiting post, which is connected to the limiting block and abuts against the side of the locking member.

10. The headphone shell injection mold according to claim 1, characterized in that, The injection mold further includes a pressure locking assembly, which includes a first locking member and a second locking member. The first locking member is connected to the base, and the second locking member is connected to the lower mold. The first locking member and the second locking member cooperate to fix the injection module on the base.

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