Multi-cavity earphone sleeve injection mold

Abstract

The utility model provides a multi-cavity earphone sleeve injection mold, which belongs to the technical field of molds, and comprises a main runner, branch runners, cavities and a cooling water channel, the main runner is positioned at the central position of the mold, the branch runners are symmetrically distributed by taking the main runner as the center and respectively extend to each cavity, the cavities are symmetrically arranged, and the cooling water channel is arranged between the cavities. And the cooling water channels are tightly attached to the cavity and are symmetrically arranged according to the cavity. According to the utility model, the multiple cavities are symmetrically arranged, and the cooling water channels are arranged according to the layout of the cavities, so that the cavities are symmetrically arranged during use, the consistency of injection molding pressure and melt flow is ensured, the deformation of the mold caused by non-uniform stress during injection molding can be effectively reduced, and the flow path and heat exchange condition of cooling liquid around the cavities are similar; therefore, the temperature gradient of each point on the surface of the cavity is reduced, the imbalance of cooling time in the injection molding period and the product molding defect are reduced, and an efficient mold solution is provided for injection molding production.

Description

Technical Field

[0001] This utility model relates to the field of injection molds, specifically to a multi-cavity headphone sleeve injection mold. Background Technology

[0002] Injection molds, as key process equipment in plastic molding, are widely used in many fields such as automobiles, electronics, home appliances, and daily necessities. Their quality and performance directly affect the precision, production efficiency, and production cost of plastic products, playing a vital role in the development of the manufacturing industry.

[0003] However, existing injection molds still have some problems that urgently need to be solved in practical applications. Many multi-cavity injection molds have relatively simple cooling channel designs, usually using straight or single-circular cooling pipe layouts. This layout leads to uneven cooling in different parts of the mold, and plastic products are prone to inconsistent shrinkage during the cooling process, resulting in defects such as warping and deformation, which seriously affect the dimensional accuracy and appearance quality of the product, thereby affecting the efficiency of mold production. Utility Model Content

[0004] The purpose of this invention is to provide a multi-cavity headphone sleeve injection mold to solve the defects mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a multi-cavity earphone sleeve injection mold, comprising an upper mold plate, a lower mold plate, cooling channels, a lower mold plate fixing plate, and an upper mold plate fixing plate. The lower mold plate fixing plate is connected to the lower mold plate. The upper mold plate has two cavities, which are symmetrically distributed with respect to the mold's central axis. The lower mold plate is located directly below the upper mold plate. The lower mold plate has two cores, which are symmetrically distributed with respect to the mold's central axis. The upper and lower mold plates are respectively provided with cooling channels introduced and led out from the sides and surrounding the injection chamber. The cooling channels are arranged symmetrically around the injection chamber with a straight line passing through the center of the injection chamber and perpendicular to the mold parting surface as the axis of symmetry.

[0006] Furthermore, the upper template fixing plate is fixedly connected to the upper template by multiple screws, and a guide sleeve is installed on the upper template.

[0007] Furthermore, the lower template fixing plate is fixedly connected to the lower template by multiple screws, and guide posts are installed on the lower template.

[0008] Furthermore, a main channel is provided at the center of the upper template, and branch channels branching off from the main channel are symmetrically distributed around the main channel, extending to the left and right cavities respectively. The length, diameter and bending angle of the branch channels are completely consistent in the symmetrical position.

[0009] Furthermore, the upper and lower mold plates close together to form two corresponding injection chambers, and when viewed along a plane perpendicular to the mold opening and closing direction, the injection chambers are completely symmetrical about the mold's central axis.

[0010] In this invention, the symmetrical arrangement of the multiple cavities in the mold results in a more balanced distribution of clamping force during injection molding. Compared to molds with asymmetrical arrangements, this mold effectively reduces deformation caused by uneven stress during injection molding, extending its service life. Simultaneously, the symmetrical arrangement of the multiple cavities optimizes the mold's cooling system design. Cooling pipes can be symmetrically arranged according to the symmetrical layout of the cavities, ensuring similar flow paths and heat exchange conditions for the coolant around the cavities, significantly reducing the temperature gradient at various points on the cavity surface. This not only effectively avoids quality problems in plastic products caused by localized overheating or undercooling, such as shrinkage marks and warping, but also improves the dimensional accuracy and appearance quality of the plastic products, increasing the mold's yield. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of a multi-cavity headphone sleeve injection mold structure proposed in this utility model;

[0013] Figure 2 This is a schematic diagram of the cooling water channel and injection chamber of this utility model;

[0014] Figure 3 This is a partial cross-sectional view of the side of this utility model;

[0015] Figure 4 This is a partial cross-sectional view of the front of this utility model;

[0016] The markings in the diagram are as follows: 1. Upper template fixing plate; 2. Upper template; 3. Lower template; 4. Lower template fixing plate; 5. Cooling water channel; 6. Screw; 7. Screw; 8. Guide sleeve; 9. Injection chamber; 10. Guide pillar; 11. Main runner; 12. Sub-runner; 13. Pull rod; 14. Cavity. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] As shown in the figure, this utility model provides an injection mold for earphone covers, mainly used for injection molding of earphone covers. It includes an upper mold plate 2, a lower mold plate 3, a cooling channel 5, a lower mold plate fixing plate 4, and an upper mold plate fixing plate 1. The lower mold plate fixing plate 4 is connected to the lower mold plate 3. The upper mold plate 2 has two cavities 14, which are symmetrically distributed about the mold's central axis. This symmetrical layout makes the mold more evenly stressed during injection molding, helping to improve the molding quality of plastic products. The lower mold plate 3 is located directly below the upper mold plate 2. Plate 3 has two cores, which are symmetrically distributed with respect to the central axis of the mold. The upper plate 2 and the lower plate 3 are respectively provided with cooling water channels 5 introduced and led out from the side and surrounding the injection chamber 9. With the straight line passing through the center of the injection chamber 9 and perpendicular to the mold parting surface as the axis of symmetry, the cooling water channels 5 are arranged symmetrically around the injection chamber, so that the cooling effect of the coolant on all directions of the cavity 14 is consistent during the circulation process, thereby achieving uniform heat dissipation and avoiding defects such as deformation and shrinkage marks in plastic products caused by uneven local heat dissipation.

[0019] The upper mold plate 1 and the upper mold plate 2 are fixedly connected by multiple screws 6, and a guide sleeve 8 is installed on the upper mold plate 2. The lower mold plate 4 and the lower mold plate 3 are fixedly connected by multiple screws 7, and a guide post 10 is installed on the lower mold plate 3. A main flow channel 11 is set at the center of the upper mold plate 2, and branch flow channels 12 branching from the main flow channel 11 are symmetrically distributed with the main flow channel 11 as the center, extending to the left and right cavities 14 respectively. The length, diameter and bending angle of the branch flow channels 12 are completely consistent in the symmetrical position, so that the plastic melt can be uniformly filled into each symmetrically arranged cavity 14 with the same pressure and flow rate. The upper mold plate 2 and the lower mold plate 3 close to form two corresponding injection chambers 9, and when viewed along a plane perpendicular to the mold opening and closing direction, the injection chambers 9 are completely symmetrical about the central axis of the mold.

[0020] Working Principle: The injection molding machine drives the lower mold plate fixing plate 4, which in turn moves the lower mold plate 3 to the upper mold plate 2 until the two cavities 14 are completely closed. Due to the symmetrical arrangement of the cavities 14 and the cooling channels 5, the mold is subjected to uniform force during mold closing, ensuring accurate closure of the cavities 14 and guaranteeing the molding accuracy of the plastic product. The molten plastic is injected into the mold's runner system through the injection molding machine nozzle and then evenly distributed into the two symmetrically arranged cavities 14. The flow path and pressure distribution of the molten plastic in the two cavities 14 are consistent, allowing the plastic product to be filled simultaneously and evenly in both cavities 14. After injection molding, the cooling system is immediately activated, and the coolant circulates in the cooling channels 5 according to the above cooling process, uniformly cooling the two cavities 14. Because the cooling channels 5 are symmetrically arranged around the cavities 14, they can quickly and evenly reduce the temperature of the cavities 14, allowing the plastic product to cool and solidify rapidly. Compared with traditional mold cooling methods, the cooling time of this mold is significantly shortened, effectively improving the mold's finished product efficiency. Once the plastic product has cooled to a suitable temperature, the injection molding machine drives the lower mold plate fixing plate 4, which in turn moves the lower mold plate 3 backward, thus opening the mold. Subsequently, the demolding mechanism located within the lower mold plate 3 ejects the plastic product from the cavity 14. Because the two cavities 14 are symmetrically arranged and cool evenly, the plastic product experiences uniform stress during demolding, reducing the likelihood of deformation, shrinkage marks, and other defects, further ensuring product quality. In summary, through the symmetrical arrangement of multiple cavities 14 and cooling channels 5, this injection mold improves mold production efficiency while ensuring the molding quality of the plastic product, demonstrating significant practical value.

[0021] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0022] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A multi-cavity earphone sleeve injection mold, characterized in that: The mold includes an upper mold plate (2), a lower mold plate (3), cooling channels (5), a lower mold plate fixing plate (4), and an upper mold plate fixing plate (1). The lower mold plate fixing plate (4) is connected to the lower mold plate (3). The upper mold plate (2) has two cavities (14) and the two cavities (14) are symmetrically distributed with respect to the central axis of the mold. The lower mold plate (3) is located directly below the upper mold plate (2). The lower mold plate (3) has two cores and the two cores are symmetrically distributed with respect to the central axis of the mold. The upper mold plate (2) and the lower mold plate (3) are respectively provided with cooling channels (5) introduced from the side and led out and surrounding the injection chamber (9). The cooling channels (5) are arranged symmetrically around the injection chamber (9) with the straight line passing through the center of the injection chamber (9) and perpendicular to the mold parting surface as the axis of symmetry.

2. The multi-cavity earphone sleeve injection mold according to claim 1, characterized in that: The upper template fixing plate (1) and the upper template (2) are fixedly connected by multiple screws (6), and a guide sleeve (8) is installed on the upper template (2).

3. The multi-cavity earphone sleeve injection mold according to claim 1, characterized in that: The lower template fixing plate (4) and the lower template (3) are fixedly connected by multiple screws (7), and guide posts (10) are installed on the lower template (3).

4. The multi-cavity earphone sleeve injection mold according to claim 1, characterized in that: The upper template (2) has a main channel (11) at its center, and the branch channels (12) branching off from the main channel (11) are symmetrically distributed with the main channel (11) as the center, extending to the left and right cavities (14) respectively. The length, diameter and bending angle of the branch channels (12) are completely consistent in the symmetrical position.

5. The multi-cavity earphone sleeve injection mold according to claim 1, characterized in that: The upper mold plate (2) and the lower mold plate (3) close together to form two corresponding injection chambers (9), and when viewed along a plane perpendicular to the opening and closing direction of the mold, the injection chambers (9) are completely symmetrical about the central axis of the mold.

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