A lower cover injection mold for a junction box

Abstract

The utility model discloses a kind of junction box lower cover injection mould, including mould base, fixed mould plate and movable mould plate, further include: auxiliary moulding mechanism: the auxiliary moulding mechanism includes the cavity of being arranged in the fixed mould plate with the movable mould plate inside, several pouring gates are provided on the cavity, cooling channel is provided on the cavity outer wall, the cooling channel is connected with solenoid valve, the fixed mould plate with the movable mould plate is provided with several exhaust grooves, the fixed mould plate with the movable mould plate outer wall is provided with mould locking bolt;Ejection mechanism: the ejection mechanism is set on the mould base.The junction box lower cover injection mould disclosed in the utility model has the technical effects of improving product quality and performance, saving cost and achieving uniform cooling, shortening forming cycle.

Description

Technical Field

[0001] This utility model relates to the field of junction box injection mold technology, and in particular to a junction box lower cover injection mold. Background Technology

[0002] Junction boxes are widely used in various electrical systems, serving to protect and connect wires. As one of the core components of a junction box, the bottom cover typically requires high precision, high reliability, and complex structural features.

[0003] However, due to unreasonable design, traditional injection molds for junction box bottom covers are prone to incomplete filling and air holes during the molding process, resulting in defects in the finished junction box bottom cover and affecting its quality.

[0004] For example, the complex internal structure can cause uneven pouring and incomplete filling during injection molding, affecting the appearance and performance of the product. Therefore, it is necessary to improve the existing injection mold for the junction box bottom cover. Utility Model Content

[0005] This utility model discloses an injection mold for the lower cover of a junction box, which aims to solve the technical problems of incomplete filling and air holes that easily occur during injection molding of the lower cover of the junction box.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A junction box bottom cover injection mold includes a mold base, a fixed mold plate, and a movable mold plate, and further includes: an auxiliary molding mechanism: the auxiliary molding mechanism includes a mold cavity disposed inside the fixed mold plate and the movable mold plate, the mold cavity is provided with a plurality of pouring gates, the outer wall of the mold cavity is provided with cooling channels, the cooling channels are connected to solenoid valves, the fixed mold plate and the movable mold plate are provided with a plurality of venting grooves, and the outer walls of the fixed mold plate and the movable mold plate are provided with mold locking bolts; and a demolding mechanism: the demolding mechanism is disposed on the mold base.

[0007] In this solution, the auxiliary molding mechanism effectively avoids product defects and improves the appearance and performance of the product. In actual use, the multi-point feeding method, with its branched gating design through multiple sprues, ensures that the molten plastic can simultaneously and evenly fill every corner of the complex mold cavity, avoiding air bubbles and poor filling. At the same time, the venting grooves can promptly expel air and gas, effectively preventing defects such as pores on the product surface. Then, the fixed and moving mold plates are fixed by locking bolts to achieve high-pressure mold closing. During the mold closing process, the cooling medium circulates in the cooling channel, quickly removing the heat generated during molding and achieving uniform cooling. This allows the plastic to cool and solidify rapidly, avoiding air bubbles and poor filling during molding. Uneven cooling reduces deformation and defects, improving product quality and performance.

[0008] In a preferred embodiment, the mold cavity includes multiple cavity units that are arranged closely and regularly.

[0009] By using miniaturized precision cavity units, the complex structure of the junction box bottom cover can be precisely molded, improving product stability and reliability.

[0010] In a preferred embodiment, the contact surface between the mold cavity and the venting groove is provided with a number of tiny venting holes.

[0011] During the injection molding process, air in the mold cavity and gating channel, as well as gases generated by the heating of the plastic, can be discharged through the vent holes and vent grooves, effectively preventing the formation of air holes on the product surface, which would affect product quality and appearance.

[0012] As described above, a junction box lower cover injection mold includes a mold base, a fixed mold plate, and a movable mold plate, and further includes: an auxiliary molding mechanism: the auxiliary molding mechanism includes a mold cavity disposed inside the fixed mold plate and the movable mold plate, the mold cavity is provided with a plurality of pouring gates, the outer wall of the mold cavity is provided with cooling channels, the cooling channels are connected to solenoid valves, the fixed mold plate and the movable mold plate are provided with a plurality of venting grooves, and the outer walls of the fixed mold plate and the movable mold plate are provided with locking bolts; and a demolding mechanism: the demolding mechanism is disposed on the mold base. The junction box lower cover injection mold provided by this utility model has the technical effects of improving product quality and performance, saving costs, achieving uniform cooling, and shortening the molding cycle. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of an injection mold for the lower cover of a junction box proposed in this utility model.

[0014] Figure 2 This is a top view of the cooling structure of the injection mold for the lower cover of a junction box proposed in this utility model.

[0015] Figure 3 This is a schematic diagram of the template structure of an injection mold for a junction box lower cover proposed in this utility model.

[0016] Figure 4 This is a schematic diagram of the mold cavity structure of an injection mold for a junction box lower cover proposed in this utility model.

[0017] Figure 5 This is a schematic diagram of the internal structure of an injection mold for the lower cover of a junction box according to this utility model.

[0018] In the attached diagram: 1. Mold base; 2. Fixed mold plate; 3. Moving mold plate; 4. Support column; 5. Mold cavity; 6. Cooling channel; 7. Sprue; 8. Rotary disk; 9. Venting groove; 10. Solenoid valve; 11. Ejector pin assembly; 12. Demolding pin; 13. Demolding cylinder; 14. Temperature control system; 15. Mold locking bolt. Detailed Implementation

[0019] 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.

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] The junction box bottom cover injection mold disclosed in this utility model is mainly used in scenarios where incomplete filling and air holes are easily encountered during the injection molding of the junction box bottom cover.

[0022] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A junction box lower cover injection mold includes a mold base 1, a fixed template 2, and a movable template 3, and further includes: an auxiliary molding mechanism: the auxiliary molding mechanism includes a mold cavity 5 disposed inside the fixed template 2 and the movable template 3, the mold cavity 5 is provided with a plurality of pouring ports 7, the outer wall of the mold cavity 5 is provided with a cooling channel 6, the cooling channel 6 is connected to a solenoid valve 10, the fixed template 2 and the movable template 3 are provided with a plurality of venting grooves 9, and the outer wall of the fixed template 2 and the movable template 3 is provided with a mold locking bolt 15; and a demolding mechanism: the demolding mechanism is disposed on the mold base 1.

[0023] In practical use, the auxiliary molding mechanism can effectively avoid product defects and improve the appearance quality and performance of the product. Through the diversion pouring design of several sprue gates 7, and the adoption of a multi-point feeding method, it is ensured that the molten plastic can simultaneously and evenly fill all corners of the complex mold cavity 5, avoiding the occurrence of air bubbles and poor filling. At the same time, the venting groove 9 can timely discharge air and gas, effectively avoiding defects such as air holes on the product surface. Then, the fixed mold plate 2 and the moving mold plate 3 are fixed by the locking bolt 15 to realize high-pressure locking and complete the mold closing. During the mold closing process, the cooling medium circulates in the cooling channel 6, quickly removes the heat generated during the molding process, achieves uniform cooling, and allows the plastic to cool and solidify quickly, avoiding air bubbles and poor filling during the molding process. Uneven cooling reduces deformation and defects, and improves product quality and performance.

[0024] Among them, the mold cavity 5 includes multiple cavity units, which are arranged closely and regularly. Through the miniaturized precision small cavity units, the complex structure of the junction box cover can be accurately formed, improving product stability and reliability.

[0025] The contact surface between the mold cavity 5 and the venting groove 9 is provided with several tiny venting holes. During the injection molding process, the air in the mold cavity 5 and the gating channel, as well as the gas generated by the plastic being heated, can be discharged through the venting holes and the venting groove 9, effectively preventing the formation of air holes on the product surface, which would affect the product quality and appearance.

[0026] The cooling channel 6 is connected to a temperature control system 14, which works in conjunction with a solenoid valve 10. The temperature control system 14 is used to monitor and adjust the temperature of the mold cavity 5 to ensure that the plastic is molded under the optimal temperature conditions. Through the linkage between the temperature control system 14 and the solenoid valve 10, the flow rate of the coolant inside the cooling channel 6 is adjusted in real time through feedback, so as to quickly remove the heat generated during the molding process, achieve uniform cooling, and shorten the molding cycle.

[0027] Reference Figure 1 , Figure 3 , Figure 4 and Figure 5 In a preferred embodiment, the demolding mechanism includes an ejector pin assembly 11 disposed on the mold base 1, and the ejector pin assembly 11 is connected to a rotating disk 8.

[0028] Specifically, the product is ejected by the ejector pin assembly 11 driven by the rotary disk 8, which has a higher degree of automation. The spiral groove depth design of the rotary disk 8 applies differentiated ejection forces to different parts of the product, which significantly improves the demolding efficiency and quality of complex products. The reduction in product damage rate leads to a reduction in scrap, which directly and effectively saves costs.

[0029] The demolding mechanism also includes a demolding pin 12 located at the bottom of the mold cavity 5. The bottom of the demolding pin 12 is connected to a demolding cylinder 13, and the demolding pin 12 and the demolding cylinder 13 work synchronously.

[0030] Specifically, by rationally arranging the distribution positions of the release pins 12, the release force can be reduced during the demolding process, product deformation can be avoided, and product quality can be improved. At the same time, a composite demolding mechanism is adopted, in which the rotary disk 8 drives the ejector pin assembly 11 and the demolding cylinder 13 to link the release pins 12. The rotary disk 8 and the ejector pin assembly 11 provide the basic ejection force, which is suitable for demolding the main body of the product. The release pins 12 and the demolding cylinder 13 provide the local enhanced ejection force, which is suitable for demolding complex structures. This achieves a triple breakthrough in efficiency, quality, and cost in demolding complex products.

[0031] Reference Figure 1 and Figure 2 In a preferred embodiment, vertical support columns 4 are provided at the four corners of the mold base 1.

[0032] Specifically, the support column 4, together with the mold base 1 and the moving template 3, forms a closed box structure, which reduces the overall deformation and flatness error of the mold. At the same time, it is compatible with multi-cavity molds. For multi-cavity molds for junction box lower covers, the support column 4 can offset the off-center load caused by the imbalance of the flow channel, and improve the uniformity of cavity pressure.

[0033] Working principle: In use, the mold is first installed on the injection molding machine. Through several sprues 7 set on the mold cavity 5, a multi-point feeding method is adopted to ensure that the molten plastic fills all corners of the complex mold cavity 5 synchronously and evenly. At the same time, small venting holes are set on the contact surface between the mold cavity 5 and the venting groove 9 to expel air and gas generated by the plastic heating in the mold cavity 5. Then, the temperature control system 14 monitors the temperature of the mold cavity 5 and dynamically adjusts the flow rate of coolant in the cooling channel 6 through the solenoid valve 10 to ensure that the plastic solidifies at the optimal temperature. Finally, the rotary disk 8 and the ejector pin group 11 provide basic ejection force for demolding the main body of the product. The demolding pin 12 and the demolding cylinder 13 provide local reinforced ejection force. The composite demolding mechanism operates synchronously to smoothly push the molded junction box bottom cover out of the mold cavity 5. Through the above steps, efficient and high-quality production of the junction box bottom cover is achieved.

[0034] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A junction box lower cover injection mold, comprising a mold base (1), a fixed template (2), and a movable template (3), characterized in that, Also includes: Auxiliary molding mechanism: The auxiliary molding mechanism includes a mold cavity (5) disposed inside the fixed mold plate (2) and the moving mold plate (3), a plurality of pouring ports (7) are provided on the mold cavity (5), a cooling channel (6) is provided on the outer wall of the mold cavity (5), a solenoid valve (10) is connected to the cooling channel (6), a plurality of venting grooves (9) are provided on the fixed mold plate (2) and the moving mold plate (3), and a locking bolt (15) is provided on the outer wall of the fixed mold plate (2) and the moving mold plate (3); Demolding mechanism: The demolding mechanism is disposed on the mold base (1).

2. The injection mold for a junction box lower cover according to claim 1, characterized in that, The mold cavity (5) includes multiple cavity units, which are arranged closely and regularly.

3. The injection mold for a junction box lower cover according to claim 1, characterized in that, The contact surface between the mold cavity (5) and the venting groove (9) is provided with several tiny venting holes.

4. The injection mold for a junction box lower cover according to claim 1, characterized in that, The cooling channel (6) is connected to a temperature control system (14), which works in conjunction with the solenoid valve (10).

5. The injection mold for a junction box lower cover according to claim 1, characterized in that, The demolding mechanism includes an ejector pin assembly (11) disposed on the mold base (1), and the ejector pin assembly (11) is connected to a rotating disk (8).

6. The injection mold for a junction box lower cover according to claim 5, characterized in that, The demolding mechanism also includes a demolding pin (12) disposed at the bottom of the mold cavity (5), and a demolding cylinder (13) is connected to the bottom of the demolding pin (12). The demolding pin (12) and the demolding cylinder (13) work synchronously.

7. The injection mold for a junction box lower cover according to claim 1, characterized in that, The mold base (1) is provided with vertical support columns (4) at its four corners.

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