阅读说明：本技术 一种金属化薄膜电容生产工艺 (Production process of metallized film capacitor ) 是由 刘兆勇 于 2021-07-20 设计创作，主要内容包括：本发明涉及薄膜电容技术领域,具体公开了一种金属化薄膜电容生产工艺,包括以下步骤：步骤S1、卷绕,将金属化薄膜或金属箔通过卷绕机卷绕成圆筒状的电容芯子；步骤S2、热压定型,将电容芯子通过热压机热压成设定的形状；步骤S3、烘干,将热压后的电容芯子放入高温真空干燥机中进行真空干燥处理；步骤S4、包裹,根据生产需要将真空干燥处理后的电容芯子进行包裹；步骤S5、喷金,对电容芯子的左右两端进行喷金处理；步骤S6、赋能,根据生产需要赋予电容芯子不同的工艺；步骤S7、焊接,将电容芯子焊接上电容引脚。本发明通过依次设置卷绕、热压定型、烘干、包裹、喷金、赋能及焊接等步骤生产出金属化薄膜电容,生产效率高,普适性强。(The invention relates to the technical field of thin film capacitors, and particularly discloses a production process of a metallized thin film capacitor, which comprises the following steps: step S1, winding, namely winding the metalized film or the metal foil into a cylindrical capacitor core by a winding machine; step S2, hot-pressing and shaping, namely, hot-pressing the capacitor core into a set shape through a hot press; step S3, drying, namely putting the hot-pressed capacitor core into a high-temperature vacuum dryer for vacuum drying; step S4, wrapping, namely wrapping the capacitor core after vacuum drying treatment according to production needs; step S5, spraying gold, namely, spraying gold on the left end and the right end of the capacitor core; step S6, enabling, namely endowing the capacitor core with different processes according to production requirements; and step S7, welding the capacitor core with the capacitor pin. The metallized film capacitor is produced by sequentially arranging the steps of winding, hot-pressing and shaping, drying, wrapping, metal spraying, energizing, welding and the like, and has high production efficiency and strong universality.)

1. A production process of a metallized film capacitor is characterized in that: the method comprises the following steps:

step S1, winding, namely winding the metalized film or the metal foil into a cylindrical capacitor core by a winding machine;

step S2, hot-pressing and shaping, namely, hot-pressing the capacitor core into a set shape through a hot press;

step S3, drying, namely putting the hot-pressed capacitor core into a high-temperature vacuum dryer for vacuum drying;

step S4, wrapping, namely wrapping the capacitor core after vacuum drying treatment according to production needs;

step S5, spraying gold, namely, spraying gold on the left end and the right end of the capacitor core;

step S6, enabling, namely endowing the capacitor core with different processes according to production requirements;

and step S7, welding the capacitor core with capacitor pins.

2. The metallized film capacitor manufacturing process of claim 1, wherein: in step S1, the reel of the winder is 2.5mm, the element length is 15mm, and the metallized film or metal foil is centered.

3. The metallized film capacitor manufacturing process of claim 1, wherein: in the step S2, the contour plate of the hot press is an aluminum plate, the hot pressing time is 260S, the temperature is 125-135 ℃, and the pressure is 8 Mpa.

4. The metallized film capacitor manufacturing process of claim 1, wherein: in the step S3, the vacuum drying process includes vacuum baking the capacitor core, wherein the vacuum baking time is 4Hrs, and the vacuum baking temperature is 135-145 ℃.

5. The metallized film capacitor manufacturing process of claim 2, wherein: in the step S4, the cold-pressed tape width in the wrapping process is 22mm, and the offset width is 2 mm.

6. The metallized film capacitor manufacturing process of claim 1, wherein: in the step S5, the thickness of the metal spraying in the metal spraying process is 0.3mm to 0.35mm, the spraying height of the primer layer is 15cm, and the spraying height of the solder layer is 10 cm.

7. The metallized film capacitor manufacturing process of claim 1, wherein: in step S6, the ac voltage during energization is 50VAC, and the dc voltage is 1300 VDC.

8. The metallized film capacitor manufacturing process of claim 1, wherein: in the step S7, the wire diameter of the capacitor pin is 0.8mm, the wire length is 24mm-26mm, and the lead pitch is 14.5mm-15.5 mm.

9. The metallized film capacitor manufacturing process of claim 1, wherein: and step S8, carrying out internal dipping, namely putting the welded film capacitor into an internal dipping machine for internal dipping according to the requirement, wherein the internal dipping solution comprises a red epoxy main agent, a red epoxy curing agent and a red epoxy thinner.

10. The metallized film capacitor production process of claim 9, wherein: and step S9, curing, namely curing the film capacitor through a high-temperature curing machine according to the requirement.

Technical Field

The invention relates to the technical field of thin film capacitors, in particular to a production process of a metallized thin film capacitor.

Background

The capacitor is very diverse depending on the dielectric, for example: electrolyte capacitors, paper capacitors, thin film capacitors, ceramic capacitors, mica capacitors, air capacitors, and the like. But are most frequently used in audio equipment, as electrolytic capacitors and film capacitors. The film capacitor is formed by stacking capacitor films such as polyethylene, polystyrene, and polycarbonate from both ends using a metal foil as an electrode, and winding the stacked capacitor films into a cylindrical shape. The film capacitor has high insulation resistance, small capacitance loss, reliability, safety and explosion resistance, and is widely used in the fields of electronics, communication, electric power and the like. When the metallized film capacitor film medium is produced, each process is independently finished on a single workbench by manpower, and the production efficiency is low.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a production process of a metallized film capacitor, aiming at the defects in the prior art, the metallized film capacitor is produced by sequentially setting the steps of winding, hot-pressing and shaping, drying, wrapping, metal spraying, energizing, welding and the like, and the production process has the advantages of flexible configuration, strong universality, low production cost, high production efficiency and no pollution, and can realize large-scale continuous production.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a production process of a metallized film capacitor comprises the following steps:

step S1, winding, namely winding the metalized film or the metal foil into a cylindrical capacitor core by a winding machine;

step S2, hot-pressing and shaping, namely, hot-pressing the capacitor core into a set shape through a hot press;

step S3, drying, namely putting the hot-pressed capacitor core into a high-temperature vacuum dryer for vacuum drying;

step S4, wrapping, namely wrapping the capacitor core after vacuum drying treatment according to production needs;

step S5, spraying gold, namely, spraying gold on the left end and the right end of the capacitor core;

step S6, enabling, namely endowing the capacitor core with different processes according to production requirements;

and step S7, welding the capacitor core with capacitor pins.

Preferably, in step S1, the reel of the winding machine is 2.5mm, the element length is 15mm, and the metallized film or metal foil is aligned in the center.

Preferably, in the step S2, the contour plate of the hot press is an aluminum plate, the hot pressing time is 260S, the temperature is 125-135 ℃, and the pressure is 8 Mpa.

Preferably, in the step S3, the vacuum drying process includes vacuum baking the capacitor core, wherein the vacuum baking time is 4Hrs, and the vacuum baking temperature is 135-145 ℃.

Preferably, in step S4, the cold-pressed tape width during the wrapping process is 22mm, and the offset width is 2 mm.

Preferably, in the step S5, the thickness of the gold spraying during the gold spraying treatment is 0.3mm to 0.35mm, the spraying height of the base layer is 15cm, and the spraying height of the soldering layer is 10 cm.

Preferably, in step S6, the ac voltage during the energization process is 50VAC, and the dc voltage is 1300 VDC.

Preferably, in the step S7, the wire diameter of the capacitor pin is 0.8mm, the wire length is 24mm to 26mm, and the lead pitch is 14.5mm to 15.5 mm.

Preferably, the metallized film capacitor production process further includes step S8 of performing dip-in, where the soldered film capacitor is placed in a dip-in machine for dip-in as required, and the dip-in solution includes a red epoxy main agent, a red epoxy curing agent, and a red epoxy diluent.

Preferably, the metallized film capacitor production process further includes a step S9 of curing, in which the film capacitor is cured by a high temperature curing machine as required.

By adopting the technical scheme, the production process of the metallized film capacitor provided by the invention produces the metallized film capacitor by sequentially setting the steps of winding, hot-pressing and shaping, drying, wrapping, metal spraying, energizing, welding and the like, has the advantages of flexible configuration, strong universality, low production cost, high production efficiency and no pollution, and can realize large-scale continuous production.

Drawings

FIG. 1 is a flow chart of a process for manufacturing a metallized film capacitor according to the present invention.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

As shown in fig. 1, in the flow chart of the manufacturing process of the metallized thin film capacitor of the present invention, the manufacturing process of the metallized thin film capacitor comprises the following steps: step S1, winding, namely winding the metalized film or the metal foil into a cylindrical capacitor core by a winding machine; step S2, hot-pressing and shaping, namely, hot-pressing the capacitor core into a set shape through a hot press; step S3, drying, namely putting the hot-pressed capacitor core into a high-temperature vacuum dryer for vacuum drying; step S4, wrapping, namely wrapping the capacitor core after vacuum drying treatment according to production needs; step S5, spraying gold, namely, spraying gold on the left end and the right end of the capacitor core; step S6, energizing, namely, endowing the capacitor core with different processes according to production requirements, namely, electrically cleaning the capacitor core after metal spraying; step S7, welding, namely welding the capacitor core with capacitor pins, and arranging the plates after welding, wherein the pattern width is as follows: 7mm high temperature tape. The production efficiency of the production process of the metallized film capacitor is several times that of the traditional process, the production efficiency of the metallized film capacitor can be greatly improved, the manufacturing cost can be reduced, and the progress of the capacitor manufacturing technology can be promoted.

Specifically, in step S1, the reel of the winding machine is 2.5mm, the element length is 15mm, the metalized films or metal foils are centered and aligned without being staggered, the two films are centered and aligned, and the inner seal is 2 circles, the outer seal is 10 circles, and the main winding is 401 circles; in the step S2, the hot press pre-flattens the wound core, wherein a contour plate of the hot press is an aluminum plate, the hot pressing time is 260S, the temperature is 125-135 ℃, and the pressure is 8 Mpa; in the step S3, the vacuum drying process includes vacuum baking the capacitor core, wherein the vacuum baking time is 4Hrs, and the vacuum baking temperature is 135-145 ℃; in step S4, the cold-pressed tape width in the wrapping process is 22mm, and the offset width is 2 mm; in the step S5, in the gold spraying process, the gold spraying surface is a zinc-tin alloy, the tin accounts for 60% -70%, the gold spraying thickness is 0.3mm-0.35mm, the spraying height of the priming layer is 15cm, and the spraying height of the soldering layer is 10 cm; in the step S6, in the energizing process, the capacitor core after metal spraying is electrically cleaned, wherein the ac voltage is 50VAC, and the dc voltage is 1300 VDC; in step S7, soldering leads to the energized capacitor core, where the lead diameter of the capacitor lead is 0.8mm, the length of the lead is 24mm-26mm, and the lead distance is 14.5mm-15.5mm, which is 15mm in the present embodiment; the production process of the metallized film capacitor further comprises a step S8 of carrying out internal dipping, wherein the welded film capacitor is placed into an internal dipping machine for selective internal dipping according to needs, and an internal dipping solution comprises a red epoxy main agent, a red epoxy curing agent and a red epoxy diluent; the production process of the metallized film capacitor further comprises a step S9 of curing, wherein the film capacitor is cured through a high-temperature curing machine according to the requirement.

It can be understood that after the thin film capacitor is subjected to curing treatment, marking is carried out according to needs, specifically in a laser marking machine, and the type, parameters and the like of the capacitor are mainly printed on the thin film capacitor; after marking, sorting can be carried out through a sorting machine according to the requirement; then, the pins of the capacitor can be processed and cut as required by a molding pin cutting machine; after the pins are cut, assembling welding and filling can be carried out on the film capacitor through an assembling welding filling machine, the capacitor core welded with the lead is filled into a plastic shell, epoxy resin is filled for sealing, and the film capacitor is obtained after the epoxy resin is cured; placing the mixture into an automatic welding braider after pouring to carry out automatic welding braider; and finally, placing the powder into a powder packaging machine for powder packaging, and packaging after powder packaging. The film capacitor produced by the invention has excellent corrosion resistance, the sealing layer is not easy to peel off from the aluminum shell after long-term use, the aluminum shell or the capacitor core is not easy to corrode, and the service life of the capacitor is obviously prolonged.

The metallized film capacitor is reasonable in design and unique in structure, and is produced by sequentially arranging the steps of winding, hot-pressing and shaping, drying, wrapping, metal spraying, energizing, welding and the like, so that the metallized film capacitor has the advantages of flexible configuration, strong universality, low production cost, high production efficiency and no pollution, and can realize large-scale continuous production.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.