BMC injection molding capacitor

Abstract

The utility model discloses a BMC injection molding capacitor. The BMC injection molding capacitor comprises a housing, a capacitor core and a lead part. The shell wraps the capacitor core, one end of the lead part is connected with the capacitor core, and the other end of the lead part extends out of the shell; the lead part is hermetically connected with the shell; and the shell is formed by integral injection molding of a BMC material. According to the BMC injection molding capacitor, the shell is arranged, the shell is formed by integral injection molding of the BMC material, the capacitor core can be rapidly and accurately installed in the shell, the integrity of the BMC injection molding capacitor is guaranteed, the production process of the BMC injection molding capacitor is simplified, and the production efficiency of the BMC injection molding capacitor is improved; according to the BMC injection molding capacitor, the capacitor core and the lead part are arranged, the lead part can be stably connected with the two ends of the capacitor core, wiring of the capacitor core is facilitated, and the use convenience of the BMC injection molding capacitor is improved.

Description

Technical Field

[0001] The utility model relates to the field of capacitors, in particular to a BMC injection-molded capacitor. Background Art

[0002] Existing film capacitors are composed of a core, a polyphenylene sulfide (PPS) shell and an epoxy resin layer. During the production process, the capacitor core is placed in the shell and then the fluid epoxy resin is injected into the shell for potting and curing. The purpose is to ensure that the product is used for a long time and prevent moisture from invading and causing the deterioration of the core's electrical properties. However, due to the complex molding process requirements of the PPS shell potting epoxy resin, the high material price and low production efficiency, the production cost of film capacitors is too high. Bulk Molding Compounds (BMC) material is a thermosetting plastic, which is mainly composed of unsaturated polyester resin, low shrinkage / low profile additives, initiators, internal release agents, mineral fillers, etc., which are pre-mixed into a paste, and then thickeners, colorants, etc. are added to make a bulk intermediate material. This material can be used for molding and injection molding processes, has good electrical properties, mechanical properties, heat resistance, chemical corrosion resistance, and has a low shrinkage rate and stable color. BMC materials can be formulated according to different final application fields to precisely control size, flame retardancy and anti-tracking, while having high dielectric strength, corrosion resistance and stain resistance. In addition, BMC materials also have excellent flow characteristics and insulation and flame retardancy, suitable for a variety of application scenarios with precise requirements for details and dimensions. Therefore, capacitors molded by BMC injection molding have the advantages of high production efficiency and low material cost. Summary of the invention

[0003] In order to solve the above problems, the purpose of the utility model is to provide a BMC injection molded capacitor, simplify the production process of the capacitor, save the material cost of the capacitor, and improve the production efficiency of the capacitor.

[0004] The technical solution adopted by the utility model to solve the problem is:

[0005] An embodiment of the utility model provides a BMC injection-molded capacitor, comprising a shell, a capacitor core and a lead portion; the shell wraps the capacitor core, one end of the lead portion is connected to the capacitor core, and the other end of the lead portion extends outside the shell; the lead portion and the shell are sealed and connected; the shell is formed by integral injection molding of BMC material.

[0006] The above-mentioned BMC injection molded capacitor has at least the following beneficial effects: by providing a shell, the shell is formed by integral injection molding of BMC material, the capacitor core can be quickly and accurately installed in the shell, thereby ensuring the integrity of the BMC injection molded capacitor, simplifying the production process of the BMC injection molded capacitor, and improving the production efficiency of the BMC injection molded capacitor; by providing a capacitor core and a lead portion, the lead portion can stably connect the two ends of the capacitor core, facilitating wiring of the capacitor core, and improving the convenience of use of the BMC injection molded capacitor.

[0007] Furthermore, the lead portion includes a plurality of conductive posts, and the plurality of conductive posts are fixed to the upper end of the housing. By providing the conductive posts, it is convenient to connect the capacitor core to an external device, thereby improving the compatibility of the BMC injection molded capacitor.

[0008] Furthermore, the housing is provided with a plurality of grooves, and the conductive pillars are fixed in the grooves. The grooves are provided to facilitate accurate positioning and installation of the conductive pillars, thereby preventing the conductive pillars from falling off during use and improving the structural stability of the BMC injection molded capacitor.

[0009] Furthermore, the cross section of the groove is trapezoidal. This structure improves the structural stability of the groove and prevents the groove from deforming during use, which would affect the stability of the BMC injection-molded capacitor.

[0010] Furthermore, the housing is provided with a positioning block extending upwards. By providing the positioning block, the housing can be fixedly installed, thereby improving the installation convenience of the BMC injection-molded capacitor.

[0011] Furthermore, the cross section of the positioning block is rectangular. The positioning block of this structure effectively increases the contact area between the housing and the external device, ensuring the installation stability of the positioning block.

[0012] Furthermore, the cross-sectional area of ​​the positioning block gradually decreases in the direction away from the capacitor core. This structure effectively ensures the structural stability of the positioning block, avoids damage to the positioning block under external force during installation, and improves the integrity of the housing.

[0013] Furthermore, the outer contour of the shell is a cylinder, an oblong cylinder or a cube. This structure ensures that the shell can be adjusted according to actual product specifications, thereby improving the compatibility of the BMC injection-molded capacitor.

[0014] Furthermore, the capacitor core is formed by winding a metal film. By winding the film into a cylindrical structure, the film forms a capacitor core that matches the shell, thereby ensuring the basic performance and structural stability of the BMC injection-molded capacitor.

[0015] Furthermore, the cross section of the capacitor core is a rounded rectangle. This structure of the capacitor core can effectively ensure that the capacitor core is not damaged by external pressure during the assembly and transportation of the BMC injection-molded capacitor, and also improves the injection molding success rate of the shell, ensuring the production yield rate of the BMC injection-molded capacitor.

[0016] The beneficial effects of the above-mentioned BMC injection-molded capacitor are as follows: by providing a shell, the shell is formed by integral injection molding of BMC material, the capacitor core can be quickly and accurately installed in the shell, thereby ensuring the integrity of the BMC injection-molded capacitor, simplifying the production process of the BMC injection-molded capacitor, and improving the production efficiency of the BMC injection-molded capacitor; by providing a capacitor core and a lead portion, the lead portion can stably connect the two ends of the capacitor core, which is convenient for wiring the capacitor core and improving the convenience of use of the BMC injection-molded capacitor; by providing a conductive column, it is convenient to connect the capacitor core to an external device and improve the compatibility of the BMC injection-molded capacitor; by providing a groove, it is convenient to accurately position and install the conductive column and avoid the conductive column from falling off during use, thereby improving the structural stability of the BMC injection-molded capacitor.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the structure of a BMC injection-molded capacitor according to an embodiment of the utility model;

[0020] Figure 2 This is a structural exploded view of a BMC injection-molded capacitor according to an embodiment of the utility model;

[0021] Figure 3 This is a cross-sectional view of a BMC injection-molded capacitor according to an embodiment of the utility model;

[0022] Figure 4 The figure is a top view of a BMC injection-molded capacitor according to an embodiment of the utility model. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] Reference Figures 1 to 4 The embodiment of the utility model provides a BMC injection-molded capacitor, including a shell 100, a capacitor core 200 and a lead portion 300; the shell 100 wraps the capacitor core 200, one end of the lead portion 300 is connected to the capacitor core 200, and the other end of the lead portion 300 extends outside the shell 100; the lead portion 300 is sealed and connected to the shell 100; the shell 100 is formed by integral injection molding of BMC material.

[0025] By providing the shell 100, the shell 100 is formed by integral injection molding of BMC material, and the capacitor core 200 can be quickly and accurately installed in the shell 100, thereby ensuring the integrity of the BMC injection-molded capacitor, simplifying the production process of the BMC injection-molded capacitor, and improving the production efficiency of the BMC injection-molded capacitor; by providing the capacitor core 200 and the lead part 300, the lead part 300 can stably connect the two ends of the capacitor core 200, which is convenient for wiring the capacitor core 200, thereby improving the convenience of using the BMC injection-molded capacitor.

[0026] In another embodiment, the lead portion 300 includes a plurality of conductive pillars 310, and the plurality of conductive pillars 310 are fixed to the upper end of the housing 100. By providing the conductive pillars 310, it is convenient to connect the capacitor core 200 to an external device, thereby improving the compatibility of the BMC injection molded capacitor.

[0027] In another embodiment, the housing 100 is provided with a plurality of grooves 110, and the conductive pillars 310 are fixed in the grooves 110. The grooves 110 facilitate accurate positioning and installation of the conductive pillars 310, thereby preventing the conductive pillars 310 from falling off during use and improving the structural stability of the BMC injection molded capacitor.

[0028] In another embodiment, the cross section of the groove 110 is trapezoidal. This structure improves the structural stability of the groove 110 and prevents the groove 110 from deforming during use, thereby affecting the stability of the BMC injection-molded capacitor.

[0029] In another embodiment, a positioning block 120 extending upward is provided on the housing 100. By providing the positioning block 120, the housing 100 is conveniently fixed and installed, thereby improving the installation convenience of the BMC injection molded capacitor.

[0030] In another embodiment, the cross section of the positioning block 120 is rectangular. The positioning block 120 of this structure effectively increases the contact area between the housing 100 and the external device, and ensures the installation stability of the positioning block 120.

[0031] In another embodiment, the cross-sectional area of ​​the positioning block 120 gradually decreases in the direction away from the capacitor core 200. This structure effectively ensures the structural stability of the positioning block 120, prevents the positioning block 120 from being damaged by external forces during installation, and improves the integrity of the housing 100.

[0032] In another embodiment, the outer contour of the housing 100 is a cylinder, an oblong cylinder or a cube. This structure ensures that the housing 100 can be adjusted according to actual product specifications, thereby improving the compatibility of BMC injection-molded capacitors.

[0033] In another embodiment, the capacitor core 200 is formed by winding a metal film. By winding the film into a cylindrical structure, the film forms the capacitor core 200 that matches the housing 100, thereby ensuring the basic performance and structural stability of the BMC injection-molded capacitor.

[0034] In another embodiment, the cross section of the capacitor core 200 is a rounded rectangle. The capacitor core 200 of this structure can effectively ensure that the capacitor core 200 is not damaged by external pressure during the assembly and transportation of the BMC injection-molded capacitor, and also improve the injection molding success rate of the housing 100, ensuring the production yield rate of the BMC injection-molded capacitor.

[0035] The working principle of the utility model is further explained below.

[0036] During the production process, firstly, according to the size requirements of the BMC injection-molded capacitor, metal films of different specifications are selected and wound to form a capacitor core 200 of corresponding size, so that the capacitor core 200 can be accommodated in the shell 100, and the performance of the capacitor core 200 is guaranteed to meet the production requirements of the BMC injection-molded capacitor; the two end faces of the capacitor core 200 are respectively connected to the conductive pillars 310, and the conductive pillars 310 are extended to the upper end of the capacitor core 200 by adhesion or external device fixation, so as to facilitate the connection of the two end faces of the capacitor core 200 to the external lead; then the capacitor core 200 and the conductive pillars 310 are placed in the injection mold for injection molding, and the BMC material is filled on the outside of the capacitor core 200 and the conductive pillars 310 to form a shell 100 that wraps the capacitor core 200, and the conductive pillars 310 are fixed at the same time; during the injection molding process, a positioning block 120 is formed on the shell 100, and a groove 110 is formed between the conductive pillars 310 and the shell 100 to complete the production process of the BMC injection-molded capacitor. Since the BMC material molding process is mature and the molding cycle is short, the entire injection molding process is efficient and controllable. In addition, since the housing 100 is formed by integral injection molding of the BMC material, there is no need to produce an additional housing made of PPS material and perform epoxy resin injection molding, which greatly simplifies the production process of the capacitor, saves the production cost of the BMC injection-molded capacitor, realizes the automated production of the BMC injection-molded capacitor, and enables the BMC injection-molded capacitor to be mass-produced.

[0037] From the above description, it can be seen that the BMC injection molded capacitor of the utility model is provided with a shell 100, and the shell 100 is formed by integral injection molding of BMC material, and the capacitor core 200 can be quickly and accurately installed in the shell 100, thereby ensuring the integrity of the BMC injection molded capacitor, simplifying the production process of the BMC injection molded capacitor, and improving the production efficiency of the BMC injection molded capacitor; by providing the capacitor core 200 and the lead part 300, the lead part 300 can stably connect the two ends of the capacitor core 200, which is convenient for wiring the capacitor core 200 and improving the convenience of use of the BMC injection molded capacitor; by providing the conductive column 310, it is convenient to connect the capacitor core 200 to external equipment, thereby improving the compatibility of the BMC injection molded capacitor; by providing the groove 110, it is convenient to accurately position and install the conductive column 310, thereby preventing the conductive column 310 from falling off during use and improving the structural stability of the BMC injection molded capacitor.

[0038] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A BMC injection molded capacitor, characterized in that: It comprises a shell, a capacitor core and a lead part; the shell wraps the capacitor core, one end of the lead part is connected to the capacitor core, and the other end of the lead part extends outside the shell; the lead part and the shell are sealed and connected; the shell is formed by integral injection molding of BMC material.

2. A BMC injection molded capacitor according to claim 1, characterized in that: The lead portion includes a plurality of conductive posts, and the plurality of conductive posts are fixed to the upper end of the housing.

3. A BMC injection molded capacitor according to claim 2, characterized in that: The shell is provided with a plurality of grooves, and the conductive posts are fixed in the grooves.

4. A BMC injection molded capacitor according to claim 3, characterized in that: The cross section of the groove is trapezoidal.

5. The BMC injection molded capacitor according to claim 1, characterized in that: The shell is provided with a positioning block extending upward.

6. A BMC injection molded capacitor according to claim 5, characterized in that: The cross section of the positioning block is rectangular.

7. A BMC injection molded capacitor according to claim 6, characterized in that: The cross-sectional area of ​​the positioning block gradually decreases in a direction away from the capacitor core.

8. The BMC injection molded capacitor according to claim 1, characterized in that: The outer contour of the shell is a cylinder, an oblong cylinder or a cube.

9. The BMC injection molded capacitor according to claim 1, characterized in that: The capacitor core is formed by winding a metal film.

10. The BMC injection molded capacitor according to claim 9, characterized in that: The cross section of the capacitor core is a rounded rectangular shape.

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