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KR-102964347-B1 - Forming Unit for Finishing Taping on Outer Circumference of Jelly-Roll

KR102964347B1KR 102964347 B1KR102964347 B1KR 102964347B1KR-102964347-B1

Abstract

The present invention relates to a forming unit for finishing the outer circumference of a jelly roll with taping, and enables stable and uniform forming of the protruding end of a film formed on the outer surface of the end of a jelly roll, after the disc welding and taping processes are completed, in the direction of the end surface of the jelly roll. The present invention comprises a forming gripper that grips a jelly roll and transports it to a forming position, and a forming member having a press-fit hole into which one end of the jelly roll gripped by the forming gripper is inserted. As the forming member rotates while the one end of the jelly roll is pressed into the press-fit hole, the protruding end of the taped film is pressed toward the circumference of the one end surface of the jelly roll, thereby forming it into a cylindrical shape that adheres to the circumference of the one end surface of the jelly roll.

Inventors

  • 오행옥
  • 전철우

Assignees

  • 주식회사 두민

Dates

Publication Date
20260513
Application Date
20260112

Claims (10)

  1. A forming unit for forming a protruding end of a film taped on the outer circumference of the end of a jelly roll after a disc is welded to the end of a cylindrical jelly roll, It includes a forming gripper for gripping a jelly roll and transporting it to a forming position, and a forming member having a press-fit hole formed therein into which one end of the jelly roll gripped by the forming gripper is inserted. As the forming member rotates while one end of the jelly roll is pressed into the press hole, the protruding end of the taped film is pressed toward the circumference of the end surface of the jelly roll, thereby forming it into a cylindrical shape that adheres to the circumference of the end surface of the jelly roll. The above forming member is positioned at the rear side of the press-fit hole and formed to protrude toward the center of the press-fit hole, and includes a plurality of forming segments arranged continuously in a circumferential direction; when one end of the jelly roll is pressed into the press-fit hole, the forming segments press the protruding end of the taped film toward the circumference of the end surface of the jelly roll to form a tight-fitting film. The main body of the above-mentioned forming member is composed of a cylindrical main body portion having a central hole formed on the front surface and a ring-shaped cover portion that covers the front perimeter of the main body portion from the front. A forming unit characterized by having a first seating groove and a second seating groove formed facing each other so that the outer ends of the forming segment are positioned on the front perimeter of the main body and the rear surface of the cover part, respectively.
  2. delete
  3. In paragraph 1, A forming unit characterized by the fact that adjacent end lines between each forming segment are finished with curved surfaces to prevent a sudden step difference from occurring at adjacent parts of the forming segments.
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  5. In paragraph 1, The above forming segment has its inner end hinge-connected to the front end of a support member supported on the inner circumference of the central hole of the main body via a hinge pin, and the rear surface of the outer end is elastically supported by a spring installed in the first seating groove, A forming unit characterized by allowing elastic displacement while being pushed slightly backward when the forming segment is pressed from the front by the perimeter of one end surface of the jelly roll and the taped film, and then returning to its original position by the restoring force of the spring.
  6. In paragraph 5, A forming unit characterized by having a support and a spring corresponding one-to-one for each of the above forming segments, so that individual forming segments can be elastically displaced independently even if the shape of the protruding end of the taped film is non-uniform.
  7. In paragraph 6, The above cover portion is composed of a plurality of unit covers formed by dividing along the front perimeter of the main body portion, and A forming unit characterized in that each unit cover is formed to correspond to an area where a plurality of forming segments are arranged, and is configured to cover and restrain the outer ends of the plurality of forming segments so as not to deviate in the forward direction.
  8. In paragraph 1, It is equipped with a forming cylinder coupled to the rear of the main body of the above-mentioned forming member and providing rotational driving force to the main body during forming, A forming unit characterized by including an actuator for moving the forming member forward and backward toward a jelly roll held by the forming gripper.
  9. In paragraph 8, A forming unit characterized in that the above-mentioned reciprocating actuator is equipped with a servo motor and moves the forming member forward and backward toward the jelly roll by means of a ball screw.
  10. A disc welding unit for welding a disc to the end of a cylindrical jelly roll, and A taping unit for taping the outer surface of the end of a jelly roll with a film, and A disc welding system comprising a forming unit of any one of claims 1, 3 and 5 through 9.

Description

Forming Unit for Finishing Taping on Outer Circumference of Jelly-Roll The present invention relates to an apparatus for stably forming a protruding end of a film taped on the outer surface of an end of a cylindrical jelly roll, and in particular, to a forming unit for finishing the outer surface of a jelly roll by uniformly pressing and forming the protruding end of a film taped toward the periphery of one end of a jelly roll after the disc welding process and the taping process have been completed, thereby enabling the realization of a smooth and uniform forming shape. Generally, a cylindrical battery including a circular jelly roll ensures current conductivity and maintains mechanical stability of the battery's internal components by welding a negative or positive disc to the end of the jelly roll. After this disc welding process, a taping process is performed to wrap and attach a film to protect the outer surface of the end of the jelly roll or to seal a fine gap in the end. Conventional taping processes have mainly used methods in which a film is wound after rotating a jelly roll with an external device or using a simple support device, followed by cutting and forming. However, due to axial wobble of the jelly roll, rotational eccentricity, and uneven film tension, the protruding ends of the film are not uniformly formed on the surface of the jelly roll. These problems can lead to various forms of appearance defects and functional defects, such as variations in forming depth, edge spreading, lifting of the forming boundary, and asymmetric shrinkage of the film ends. In particular, conventional forming processes often had limitations in that the forming structure surrounding the end of the jelly roll was frequently limited to a simple fixed annular section or a central press-fit structure, making it difficult to ensure that the protruding end of the film was uniformly folded inward along the entire circumference. Furthermore, if the forming section applied pressure intensively to a specific area or failed to sufficiently correct the shape, tolerance, or eccentricity of the jelly roll's end, the forming shape became inconsistent, leading to an increased defect rate in subsequent processes. Therefore, a new forming technology is required that can provide stable and uniform press-fit force over the entire circumference of the outer surface of the end of the taped jelly roll, ensure uniformity and symmetry of the forming shape, and minimize the effects of eccentricity of the end of the jelly roll or variations in film thickness. FIG. 1 is a block diagram of a disc welding system including a forming unit according to an embodiment of the present invention. FIG. 2 is a perspective view of a forming unit according to an embodiment of the present invention. FIG. 3 is a perspective view of a forming member in a forming unit according to an embodiment of the present invention. FIG. 4 is a front view of a forming member in a forming unit according to an embodiment of the present invention. FIG. 5 is a partially exploded view of a forming member in a forming unit according to an embodiment of the present invention. A forming unit according to embodiments of the present invention will be described in detail with reference to the attached drawings. Since the present invention is susceptible to various modifications and may take various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed forms, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention. Similar reference numerals have been used for similar components in the description of each drawing. In the attached drawings, the dimensions of the structures are shown enlarged or reduced to the actual size to ensure clarity of the present invention or to allow for understanding of the schematic configuration. Additionally, terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. Meanwhile, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application. <Examp