JP4618092B2 - Capacitor element manufacturing equipment - Google Patents

Description

  The present invention is used in various electronic equipment, electrical equipment, industrial equipment, automobiles, and the like, and in particular, when producing metallized film capacitors that are optimal for smoothing, filtering, and snubbing of motor drive inverter circuits in hybrid cars. The present invention relates to a capacitor element manufacturing apparatus to be used.

  In recent years, from the viewpoint of environmental protection, all electric devices are controlled by inverter circuits, and energy saving and high efficiency are being promoted. In particular, in the automobile industry, hybrid vehicles (hereinafter referred to as HEVs) that run on electric motors and engines have been introduced into the market, and the development of technologies relating to energy saving and high efficiency has been activated.

  Since such a HEV electric motor has a high operating voltage range of several hundred volts, a metallized film capacitor having high withstand voltage and low loss electric characteristics is used as a capacitor used in connection with such an electric motor. In addition, due to the demand for maintenance-free in the market, the tendency to adopt metallized film capacitors with extremely long life is conspicuous.

  And this kind of metallized film capacitor is obtained by winding a metallized film in which a metal vapor-deposited electrode is formed on a dielectric film made of resin so that a pair of metal vapor-deposited electrodes are opposed to each other through the dielectric film. Constructed by forming a capacitor element and forming metalized metal extraction electrodes on both end faces of this capacitor element, reducing the size of the equipment or power supply used and mounting it on the printed circuit board Due to restrictions on the area and the like, a flat capacitor having a rectangular shape formed by crushing a cylindrical capacitor element made of a wound film is used. An apparatus for manufacturing such a capacitor element will be described below.

  FIG. 3 is a front view showing a configuration of this type of conventional capacitor element manufacturing apparatus. In FIG. 3, for example, a material foil 16 of a metal foil film is loaded on a hanging shaft 15 and a separator film of the hanging shaft 17 is loaded. After the material wound material 18 is loaded, it is guided to the aligning roller 20 through the induction roller 19 and wound around the core shaft 22 of the rotor 21 to form the capacitor element 23.

As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
JP-A-7-74065

  However, in the above conventional capacitor element manufacturing apparatus, when the wound capacitor element 23 is taken out from the core shaft 22 and flattened by a crushing jig (not shown), it is shown in FIGS. 4 (a) and 4 (b). As described above, due to factors such as the strength of the core 23a provided on the capacitor element 23, there is a problem that the capacitor element 23 swells or returns to the original state after flattening or the core 23a is broken. there were.

  Therefore, when such a phenomenon occurs, variation occurs when forming extraction electrodes (not shown) made of metal spray by metal spraying on both end faces of the capacitor element 23, or the outer dimensions of the capacitor element 23 are large. There has been a problem that the performance as a capacitor cannot be sufficiently satisfied.

  An object of the present invention is to solve such a conventional problem and to provide a capacitor element manufacturing apparatus capable of stably manufacturing a capacitor element having excellent performance by performing flattening with high accuracy. Is.

  In order to solve the above-described problems, the present invention provides at least a first supply unit that sends out a film wound around a bobbin or a reel, a second supply unit that is configured similarly, and the first and second units. In a capacitor element manufacturing apparatus having a winding unit that overlaps and winds two films each fed from a supply unit as a pair, taking out the element that holds and takes out the capacitor element wound by the winding unit A chuck, an element opening pin that fits in a pair in the cavity of the capacitor element held by the element take-out chuck and pushes the capacitor element outward from the cavity, and the capacitor element deformed by the element opening pin is opened. It is configured to have an element processing part consisting of a press that presses from the direction perpendicular to the direction of pin movement and flattenes.

  As described above, the capacitor element manufacturing apparatus according to the present invention inserts an element opening pin into the cavity portion of the capacitor element and pushes the cavity portion in the outer circumferential direction by the element processing portion for flattening the wound capacitor element. This makes it possible to force a bend, and by pressing this bend as the starting point of the crushing process, the crushing process can be performed with high accuracy, thereby stabilizing the capacitor element with excellent performance. Thus, the effect of being able to be manufactured is obtained.

(Embodiment)
Hereinafter, the invention described in the entire claims of the present invention will be described by using embodiments.

  1 is a front view showing a configuration of an element processing unit of a capacitor element manufacturing apparatus according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 1 denotes a capacitor element wound by a winding unit (not shown). The element take-out chuck 1 is attached to the slide rail 2 so as to be freely movable in the vertical direction in the figure.

  Reference numeral 3 denotes a pair of element opening pins provided so as to be fitted in the cavity of the capacitor element, and the element opening pins 3 are attached so as to be freely movable in the front-rear direction and the left-right direction in the drawing. And the contact part 3a contact | abutted with the cavity part of a capacitor | condenser element is formed in the weight shape. A press 4 is configured to press the element take-out chuck 1 holding the capacitor element from above and below from the direction orthogonal to the opening direction of the element opening pin 3.

  The operation of the element processing unit configured as described above according to the present embodiment will be described with reference to FIGS. 2A to 2C. First, as shown in FIG. After the capacitor element 5 wound in (1) is held and taken out from above and below by the element take-out chuck 1, the element opening pin 3 is moved from the back to the front in the figure and inserted into the cavity 5 a of the capacitor element 5. Then, the element opening pin 3 is moved in the outer peripheral direction and brought into contact with the cavity 5 a of the capacitor element 5.

  Subsequently, as shown in FIG. 2B, the element opening pin 3 is further moved in the outer peripheral direction to spread the capacitor element 5 in the outer peripheral direction, and the element take-out chuck 1 is moved so as to be compressed from above and below. Then, the capacitor element 5 is deformed into an oval shape, and then the element opening pin 3 is moved and extracted from the cavity 5a of the capacitor element 5 and returned to the original position.

  Subsequently, as shown in FIG. 2 (c), by operating the press 4 and pressing the element take-out chuck 1 holding the capacitor element 5 from above and below from the direction orthogonal to the opening direction of the element opening pin 3, The capacitor element 5 is flattened.

  As described above, the element processing portion according to the present embodiment has the above-described weight shape by pushing the cavity portion 5a of the capacitor element 5 in the outer circumferential direction by the element opening pin 3 having the contact portion 3a having the weight-shaped tip. The bent contact portion 3a can be provided with a bend in the hollow portion 5a as a starting point of bending, whereby the core of the capacitor element 5 flattened by the press 4 is swollen or broken. Therefore, the extraction electrode made of metallicon is formed with high accuracy in the subsequent process, and the performance as a capacitor can be sufficiently satisfied.

  The capacitor element manufacturing apparatus according to the present invention has an effect that a capacitor element having excellent performance can be stably manufactured by performing flattening of the capacitor element with high accuracy. It is useful as a manufacturing apparatus for manufacturing metalized film capacitors and the like.

The front view which showed the structure of the element process part of the capacitor | condenser element manufacturing apparatus by one embodiment of this invention (A)-(c) Manufacturing process drawing for demonstrating operation | movement of the element processing part Front view showing the configuration of a conventional capacitor element manufacturing apparatus (A), (b) Cross-sectional view of the capacitor element showing the state of flat processing failure

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Element picking chuck 2 Slide rail 3 Element opening pin 3a Contact part 4 Press 5 Capacitor element 5a Cavity part

Claims (3)

At least a first supply unit that sends out a film wound around a bobbin or a reel, a second supply unit configured in the same manner, and two films that are sent out from the first and second supply units, respectively. In a capacitor element manufacturing apparatus having a winding unit that overlaps and winds as a pair, an element extraction chuck that holds and extracts the capacitor element wound by the winding unit, and is held by the element extraction chuck An element opening pin that fits in a pair in the cavity of the capacitor element and pushes the capacitor element outward from the cavity, and the capacitor element deformed by the element opening pin is pressed in a direction orthogonal to the moving direction of the element opening pin. Capacitor element manufacturing apparatus provided with an element processing portion consisting of a press for flattening. The capacitor element manufacturing apparatus according to claim 1, wherein the contact portions of the pair of element opening pins that contact the cavity portion of the capacitor element are conical. The capacitor element manufacturing apparatus according to claim 1, wherein a metallized film in which a metal vapor-deposited electrode is formed on a dielectric film is used as a film to be loaded into at least one of the first and second supply units.

Images