No-weld-line switch panel injection mold

Abstract

The utility model discloses a weld-line-free switch panel injection mold, and belongs to the technical field of injection molds. The mold comprises an upper mold, a lower mold, an upper mold core, a lower mold core and a heating pipeline, the upper mold core and the lower mold core form a product mold cavity, and a heating water well is arranged on the back face of the upper mold core used for forming a product through hole. The interior of the heating well is divided into left and right heating chambers by a sealing partition plate, and the left and right heating chambers are communicated through a notch at one end. According to the structural design, the area near the through hole of the product can be precisely and locally heated, the plastic melt temperature field is effectively improved, and weld lines generated due to uneven temperature are reduced. Meanwhile, a heating medium flowing path is increased through the unique heating well structure, good fusion of melts is ensured, the problem of weld lines near the through holes is fundamentally solved, and the appearance quality of products is remarkably improved. Moreover, as the welding lines are reduced, the internal structure of the product near the through hole is more compact and uniform, the mechanical properties such as strength and toughness are enhanced, the overall service life of the product is prolonged, and the reliability of the product is improved.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold for a switch panel without ferrite wires. Background Technology

[0002] In the field of injection molding, manufacturing products with through-hole structures has always presented numerous challenges. This is especially true when producing products like switch panels, where extremely high aesthetic quality requirements are demanding, where traditional injection molds reveal significant shortcomings.

[0003] Typically, during the molding of products with through holes using existing injection molds, the molten plastic easily forms weld lines near the through holes due to changes in melt flow direction and uneven temperature distribution. These weld lines not only severely affect the product's appearance and aesthetics but also weaken its mechanical properties in that area, such as strength and toughness, thereby impacting the product's overall lifespan and reliability.

[0004] To address the aforementioned issues, various attempts have been made within the industry, such as adjusting injection molding process parameters and optimizing mold gate positions, but the results have been unsatisfactory. Therefore, developing an injection mold that can effectively solve the weld line problem near through-holes is of significant practical importance and urgency. Against this backdrop, this patent proposes a weld line-free switch panel injection mold, aiming to fundamentally improve the molding quality of the product in the through-hole area through innovative structural design. Utility Model Content

[0005] In view of the shortcomings of the prior art, this utility model provides an injection mold for a switch panel without fused wires.

[0006] The technical solution adopted by this utility model is: a non-fusible wire switch panel injection mold, including an upper mold, a lower mold, an upper mold core, a lower mold core, and a heating pipe. The upper mold core and the lower mold core form a mold cavity for molding the product. A heating water well is provided on the back of the upper mold core at the through hole of the product. The heating water well is provided with a left heating chamber and a right heating chamber separated by a sealing partition. One end of the sealing partition is provided with a notch for connecting the left heating chamber and the right heating chamber. The two ends of the heating water well have inlet and outlet ends for connecting to the inlet and outlet ends of the heating pipe.

[0007] Furthermore, the heating water well has an "elliptical" structure.

[0008] Furthermore, one end of the heating water well is provided with a positioning notch, and one end of the sealing partition is provided with a positioning protrusion that engages with the positioning notch.

[0009] Furthermore, the bottom of the mold cavity of the upper mold core is provided with a protrusion for a through hole for molding the product.

[0010] Furthermore, the coverage area of ​​the heating water well is greater than 50% of the area of ​​the through hole.

[0011] Furthermore, a sealing ring is provided around the outer edge of the heating water well.

[0012] The beneficial effects of this utility model are:

[0013] 1. Effective Elimination of Weld Lines: This application utilizes a heating water well located on the back of the upper mold core behind the through-hole of the product to precisely and locally heat the area near the through-hole. When the molten plastic flows through this area, the heat emitted by the heating water well effectively improves the temperature field of the melt, making the melt temperature more uniform and greatly reducing the formation of weld lines caused by temperature differences. Simultaneously, a sealing baffle within the heating water well divides it into a left heating chamber and a right heating chamber, connected by a notch. This unique design increases the flow path of the heating medium, allowing the area near the through-hole to receive longer and more stable heating, further ensuring good fusion of the melt in this area. This fundamentally solves the problem of weld lines near the through-hole and significantly improves the product's appearance quality.

[0014] 2. Enhanced Product Mechanical Properties: Due to the reduction or elimination of weld lines, the internal structure of the product near the through-hole area is more dense and uniform. This effectively enhances the mechanical properties of this area, such as strength and toughness. Compared to products manufactured using traditional injection molds, the switch panels produced by this patent are better able to withstand external forces during use, reducing the risk of cracking or damage due to insufficient local strength. This significantly extends the overall service life and reliability of the product, improving its market competitiveness.

[0015] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The utility model will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the upper mold core, lower mold core, and heating pipes.

[0018] Figure 3 This is a schematic diagram of the lower side of the upper mold core.

[0019] Figure 4 This is a schematic diagram of the upper side of the mold core.

[0020] Figure 5This is a schematic diagram of the upper mold core and the sealing partition.

[0021] Figure 6 This is a structural diagram of the product.

[0022] Figure 7 This is a schematic diagram of the heating partition.

[0023] Figure 8 This is a schematic diagram of the cross-section of the heating water well.

[0024] Figure 1-8 In the middle: 1. Upper mold; 2. Lower mold; 3. Upper mold core; 4. Lower mold core; 5. Heating pipe; 6. Product; 7. Mold cavity; 8. Through hole; 9. Heating water well; 10. Sealing partition; 11. Left heating chamber; 12. Right heating chamber; 13. Notch; 14. Inlet and outlet; 15. Positioning notch; 16. Positioning protrusion; 17. Protrusion; 18. Sealing ring. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0027] This utility model provides an injection mold for a switch panel without fused wires.

[0028] In this embodiment, refer to Figure 1-8 The injection mold for the switch panel without fused wires includes an upper mold 1, a lower mold 2, an upper mold core 3 and a lower mold core 4, and a heating pipe 5. A mold cavity 7 for molding a product 6 is formed between the upper mold core and the lower mold core. A heating water well 9 is provided on the back of the upper mold core at the through hole 8 for molding the product 6. The heating water well 9 is provided with a left heating chamber 11 and a right heating chamber 12 separated by a sealing partition 10. One end of the sealing partition is provided with a notch 13 for connecting the left heating chamber and the right heating chamber. The two ends of the heating water well have inlet and outlet 14 for connecting to the inlet and outlet ends of the heating pipe.

[0029] In the above technical solution, by setting a heating water well on the back of the upper mold core on the back of the product through hole, the area near the product through hole can be locally heated, which can effectively improve the temperature distribution of the plastic melt in this area, reduce the weld lines caused by uneven temperature, and significantly improve the appearance quality of the product. At the same time, the sealing partition divides the heating water well into left and right heating chambers and connects them through a gap, which extends the flow path of the heating medium and further enhances the heating effect on the area near the through hole, ensuring better fusion of the melt and fundamentally solving the weld line problem.

[0030] During injection molding, molten plastic is prone to weld lines due to temperature variations when flowing through through-hole areas. Installing heating water wells in these areas can specifically increase the local temperature, making the melt temperature more uniform and reducing the likelihood of weld lines. Sealing baffles increase the flow path of the heating medium, ensuring a continuous and stable transfer of heat to the periphery of the through-holes and optimizing melt fusion conditions.

[0031] Specifically, the heating water well has an "elliptical" structure.

[0032] In this embodiment, the "elliptical" design allows the heating medium to more evenly cover the area around the through-hole that needs to be heated when flowing inside the well. Due to its shape, heat can diffuse to the surrounding area at a more consistent rate during the transfer process, making the corresponding area of ​​the product more evenly heated, meeting the temperature requirements for uniform melting of the plastic melt, and reducing weld lines caused by uneven local heating.

[0033] Specifically, one end of the heating water well is provided with a positioning notch 15, and one end of the sealing partition is provided with a positioning protrusion 16 that engages with the positioning notch.

[0034] In this embodiment, the engagement of the positioning notch and the positioning protrusion provides a precise positioning reference for the installation of the sealing partition. During installation, the engagement of the two allows the sealing partition to be installed quickly and accurately in the designated position, preventing it from shifting within the heating water well. This fixes the flow path of the heating medium between the left and right heating chambers and the notch, ensuring consistent and stable heat transfer and providing reliable heating conditions for product molding.

[0035] Specifically, the bottom of the mold cavity of the upper mold core is provided with a protrusion 17 for forming a through hole for the product.

[0036] In this embodiment, the protrusion at the bottom of the upper mold cavity is used to directly form the through hole of the product. This structural design makes the through hole forming process simpler and more precise, reduces the subsequent secondary processing steps for the through hole, and improves production efficiency. At the same time, the one-piece molding method can ensure the connection strength between the through hole and the product as a whole, and improve product quality.

[0037] Specifically, the coverage area of ​​the heating water well is greater than 50% of the area of ​​the through hole.

[0038] In this embodiment, the heating water well covers an area greater than 50% of the through-hole area, ensuring that a large area near the through-hole of the product can be fully heated, expanding the heating influence range, and effectively covering more areas that may produce weld lines. This greatly improves the success rate of eliminating weld lines and comprehensively enhances the molding quality of the product in the area surrounding the through-hole.

[0039] Specifically, a sealing ring 18 is provided around the outer edge of the heating water well.

[0040] In this embodiment, a sealing ring is provided around the outer edge of the heating water well, forming a seal between the sealing ring and the upper mold. This effectively prevents leakage of the heating medium, ensuring the sealing and stability of the heating system. It avoids problems such as reduced heating efficiency and mold damage caused by heating medium leakage, extending the mold's service life. Simultaneously, it ensures a safe and clean working environment for the mold, guaranteeing smooth production.

[0041] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A no-weld-line switch panel injection mold comprising an upper mold, a lower mold, an upper mold core and a lower mold core, and a heating line, a mold cavity for molding a product is formed between the upper mold core and the lower mold core, characterized in that: The back of the upper die core for the through hole of the shaped product is provided with a heating water well, which is divided into a left heating chamber and a right heating chamber by a sealing partition plate, one end of the sealing partition plate is provided with a notch for connecting the left heating chamber and the right heating chamber, and the two ends of the heating water well are provided with inlets and outlets connected with the inlet end and the outlet end of the heating pipeline.

2. The no-weld-line switch panel injection mold of claim 1, wherein: The heating water well is of an "elliptical" structure.

3. The no-weld-line switch panel injection mold of claim 1, wherein: One end of the heating water well is provided with a positioning notch, and one end of the sealing partition plate is provided with a positioning protrusion which is clamped into the positioning notch.

4. The no-weld-line switch panel injection mold of claim 1, wherein: The bottom of the die cavity of the upper die core is provided with a protrusion for the through hole of the shaped product.

5. The no-weld-line switch panel injection mold of claim 1, wherein: The covering area of the heating water well is greater than 50% of the area of the through hole.

6. The no-weld-line switch panel injection mold of claim 1, wherein: The outer ring of the heating water well is provided with a sealing ring.

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