Fixture for glue pouring molding and pin positioning of thin film capacitor

Abstract

The utility model provides a film capacitor glue pouring shaping and pin positioning work fixture, which is characterized by comprising a base, a filler strip and a tooth-shaped positioning clamping plate, the tooth-shaped positioning clamping plate, the filler strip and the base are sequentially arranged from top to bottom, the base is provided with a plurality of cavities, the sizes of the cavities are matched with the sizes of product shells, and the tooth-shaped positioning clamping plate and the filler strip are matched with each other. The product shell is loaded with a product and then is arranged in the base cavity; the appearance size of the tooth-shaped positioning clamping plate is consistent with that of the base, the middle of the tooth-shaped positioning clamping plate is an empty slot, a plurality of convex teeth are vertically symmetrical in the empty slot and are provided with cavities matched with sheet pins to insert, and the neutral lines of the convex teeth are consistent with the neutral line of the cavity of the base; the base cavity is through up and down, so that the product is easy to demould after the glue pouring material is cured; the hollowed-out parts of the tooth-shaped positioning clamping plate are more, so that the glue filling operation is easy to complete; a cavity of a base of the product shell is matched, so that deformation of the shell in the high-temperature drying process is prevented; the tooth-shaped positioning clamping plate fixes the sheet pins, so that the pin positioning problem of the capacitor is solved, and deviation of the pins in the transfer process after glue pouring is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of capacitors, and in particular relates to a tooling fixture for glue pouring, shaping and pin positioning of film capacitors. Background Art

[0002] Film capacitors use metal foil as electrodes, overlapped with a plastic film such as polyethylene, polypropylene, polystyrene, or polycarbonate, and then rolled into a cylindrical shape. They are primarily used in various industries, including electronics, communications, and power generation.

[0003] Chinese patent number CN217847707U discloses a potting packaging tool for radial lead film capacitors. This packaging tool uses a potting mold and tooling for demolding and packaging, which can ensure good batch consistency of products. The core group position and lead spacing are fixed by the potting mold and positioning tooling, which can effectively ensure that the core group is centered and the lead spacing meets the requirements. The appearance of the encapsulated product is smooth and flat.

[0004] However, the packaging tooling has the following problems:

[0005] ① After the cast material is cured, it is difficult to demould.

[0006] ②The operating space is blocked during perfusion. Utility Model Content

[0007] To solve the above problems, the utility model provides a film capacitor glue potting and pin positioning fixture, which is characterized by comprising a base, a pad and a toothed positioning splint, wherein the toothed positioning splint, the pad and the base are arranged in sequence from top to bottom, and the base is provided with multiple cavities, the size of the cavities and the product shell are matched, and the product shell is placed in the base cavity after the product is loaded.

[0008] Furthermore, the toothed positioning plate has the same dimensions as the base, with a hollow center containing multiple symmetrical teeth. Each tooth has a cavity for the matching pins, and the neutral line of the teeth aligns with the neutral line of the base cavity. The remaining hollowed-out area is used for glue pouring.

[0009] Furthermore, a pad is provided between the base and the toothed positioning splint.

[0010] Furthermore, there are two pads, which are placed along the length direction on both sides of the upper end surface of the base without cavities and slots. The pads are used to prevent the glue filling material from directly adhering to the positioning splint.

[0011] Furthermore, threaded holes are provided at relative positions of the base, the pad and the toothed positioning splint, and the three are fixedly connected by a plurality of round head screws.

[0012] The utility model has the following beneficial effects:

[0013] 1) The base cavity is transparent from top to bottom, making it easy to demould the product after the glue is cured;

[0014] 2) The tooth-shaped positioning splint has many hollowed-out parts and no obstruction on the top, making it easy to complete the glue pouring operation;

[0015] 3) By matching the mold cavity of the base of the product shell, it prevents the deformation of the thin wall during the high-temperature drying process of the potting material, which will cause deformation of the entire shell;

[0016] 4) The thin-film pins are fixed by the toothed positioning clamp, which solves the pin positioning of the film capacitor after the core is welded, and prevents the pin from being offset during the transfer and drying process after the glue is poured. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 It is a structural diagram of the base of the utility model;

[0019] Figure 3 This is a structural diagram of the utility model pad;

[0020] Figure 4 This is a structural diagram of the positioning splint of the utility model;

[0021] Figure 5 It is a structural diagram of the round head screw of the utility model;

[0022] Figure 6 It is a schematic diagram of the product after potting and positioning and the product without potting of the utility model;

[0023] Figure 7 This is a schematic diagram of the product before potting;

[0024] Figure 8 This is a schematic diagram of the product after potting and drying;

[0025] Figure 9 is a schematic diagram of a thin-sheet electrode;

[0026] Figure 10 It is a schematic diagram of the structure of the core wound out of the film capacitor;

[0027] Figure 11 It is a structural diagram of the shell of the potting product.

[0028] In the figure: 1-base; 2-spacer; 3-positioning splint; 4-round head screw; 5-sealed product; 6-unsealed product. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1

[0031] See also Figure 1-5 The utility model provides a technical solution: a film capacitor glue filling and shaping and pin positioning fixture, characterized in that it includes a base 1, a pad 2 and a toothed positioning splint 3, the toothed positioning splint, pad and base are arranged in sequence from top to bottom, the base 1 is provided with multiple cavities, the size of the cavity and the product shell are matched, and the product shell is placed in the cavity of the base 1 after the product is loaded.

[0032] The toothed positioning clamp 3 has the same dimensions as the base 1, with a hollow center. The hollow center contains multiple symmetrical teeth. Each tooth has a cavity for the matching thin-film pins. The neutral line of the teeth aligns with the neutral line of the cavity in the base 1. The remaining hollowed-out area is used for glue pouring.

[0033] A pad strip 2 is provided between the base 1 and the toothed positioning clamp 3 .

[0034] There are two pads 2, which are placed on both sides of the upper end surface of the base along the length direction and at places without cavities and slots. The pads 2 are used to prevent the glue filling material from directly adhering to the positioning splint.

[0035] The base 1 , the pad 2 and the toothed positioning splint 3 are all provided with threaded holes at relative positions, and the three are fixedly connected by a plurality of round head screws 4 .

[0036] Working principle: When using the film capacitor glue shaping and pin positioning fixture, if Figure 6-11 As shown, two thin-sheet electrodes are welded to the product core, and the product core is placed in the product shell with the thin-sheet electrodes outside. The product shell is then placed in the cavity of the base 1. The thin-sheet electrodes pass through the toothed positioning splint 3, and the pad 2 is placed between the base 1 and the toothed positioning splint 3. A square can be used to help position the toothed positioning splint 3 and the side of the base 1. The base 1, pad 2 and toothed positioning splint 3 are then fixed with round-head screws 4 so that the thin-sheet pins are centered. Glue is poured into the hollowed-out part of the toothed positioning splint 3. After pouring glue, the capacitor is transferred to an oven for drying. After drying, it is taken out from the base 1 to obtain a chip-type double-pin film capacitor product.

[0037] The utility model can be transparent from top to bottom through the base cavity, which makes it easy to demould the product after the glue is cured; the toothed positioning clamp can hollow out a large part, leaving no obstruction on the top, making it easy to complete the glue pouring operation; the base cavity can be matched with the product shell to prevent the deformation of the thin wall during the high-temperature drying of the glue, which will cause deformation of the entire shell; the toothed positioning clamp can be used to fix the thin-film pins, thereby solving the problem of pin positioning of the film capacitor after the core is welded, and preventing the problem of pin deviation during the transfer and drying process after glue pouring.

[0038] The above disclosure is only a specific embodiment of the present invention, but the present invention is not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A fixture for film capacitor potting, shaping and pin positioning, characterized by: The invention comprises a base (1), a pad (2) and a toothed positioning splint (3), wherein the toothed positioning splint, the pad and the base are arranged in sequence from top to bottom, and the base (1) is provided with a plurality of cavities, the dimensions of the cavities and the product shells being matched, and the product shells are loaded with products and placed in the cavities of the base (1).

2. The film capacitor potting, shaping and pin positioning fixture according to claim 1, characterized in that: The toothed positioning clamp (3) has the same external dimensions as the base (1), with an empty slot in the middle. The slot has a plurality of convex teeth symmetrically arranged in the upper and lower parts. The convex teeth have cavities for inserting matching thin-sheet pins, and the neutral lines of the convex teeth are consistent with the neutral line of the base (1) cavity.

3. The film capacitor potting, shaping and pin positioning fixture according to claim 1, characterized in that: A pad strip (2) is provided between the base (1) and the toothed positioning clamping plate (3).

4. The film capacitor potting, shaping and pin positioning fixture according to claim 3, characterized in that: There are two pads (2) which are placed on both sides of the upper end surface of the base along the length direction and at locations without cavities or slots.

5. The film capacitor potting, shaping and pin positioning fixture according to claim 3 or 4, characterized in that: The base (1), the pad (2) and the toothed positioning clamp (3) are all provided with threaded holes at relative positions, and the three are fixedly connected by a plurality of round head screws (4).

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