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KR-20260062419-A - Apparatus and method for manufacturing double-sided corrugated board sheets

KR20260062419AKR 20260062419 AKR20260062419 AKR 20260062419AKR-20260062419-A

Abstract

The present invention provides an apparatus for manufacturing double-sided corrugated cardboard sheets at a single station without separate adhesive application and adhesive drying devices, wherein the manufacturing apparatus comprises: a corrugated core supply device for supplying a corrugated core; a first surface liner supply device for supplying a first surface liner; a second surface liner supply device for supplying a second surface liner; a first roller and a second roller configured to heat-press the supplied corrugated core so that crests and ridges are formed at regular intervals and curves are formed on the supplied corrugated core; a third roller configured to bond one side of the corrugated core with the crests and ridges formed thereon and the supplied first surface liner together to form a single-sided corrugated cardboard; and a fourth roller configured to bond the other side of the single-sided corrugated cardboard with the first surface liner bonded to one side and the supplied second surface liner together to form a double-sided corrugated cardboard.

Inventors

  • 박용임

Assignees

  • 주식회사 지라인

Dates

Publication Date
20260507
Application Date
20241029

Claims (6)

  1. As a device for manufacturing double-sided corrugated cardboard sheets at a single station without separate adhesive application and adhesive drying devices, A corrugated core supply device for supplying corrugated cores, wherein at least one surface of the corrugated core is coated with a heat bonding material; A first surface liner supply device for supplying a first surface liner, wherein at least one surface of the first surface liner is coated with a heat bonding material; A second surface liner supply device for supplying a second surface liner, wherein at least one surface of the second surface liner is coated with a heat bonding material; A first roller and a second roller configured to rotate by interlocking with each other, wherein the first roller and the second roller are configured to heat-press the supplied corrugated core so that the peaks and valleys are formed at regular intervals and folded. A third roller configured to form a single-sided corrugated cardboard by joining one side of the corrugated core sheet having the above-mentioned peaks and valleys with the first surface liner supplied thereto; and A fourth roller configured to form a double-sided corrugated board by joining the other side of a single-sided corrugated board, on which the first surface liner is joined to one side, with the second surface liner supplied thereto; A manufacturing apparatus for double-sided corrugated sheets characterized by including
  2. A manufacturing apparatus for double-sided corrugated sheets according to claim 1, further comprising a guide portion disposed adjacent to the third roller and the fourth roller to guide the double-sided corrugated sheet toward the discharge port.
  3. A manufacturing apparatus for a double-sided corrugated sheet according to paragraph 2, wherein the guide portion supports or maintains the heat-bonded double-sided corrugated sheet in its bonded state while cooling it.
  4. A manufacturing apparatus for a double-sided corrugated sheet according to claim 1, wherein the heat-bonding material pre-coated on both sides of the corrugated core, the first surface liner, and the second surface liner additionally has an air-blocking function, a waterproof function, and a heat-blocking function in addition to the heat-bonding function.
  5. A method for manufacturing double-sided corrugated sheets at a single station without separate adhesive application and adhesive drying devices, A step of coating a heat bonding material on at least one surface of the core sheet, the first surface liner, and the second surface liner; A step of supplying the above-mentioned corrugated core from the first side; A step of supplying the first surface liner from the second side; A step of applying heat and applying pressure to the heat-bonding material coated on the supplied corrugated core to form peaks and valleys at regular intervals on the corrugated core; A step of forming a single-sided corrugated cardboard by joining one side of the corrugated core sheet having the above-mentioned peaks and valleys with the supplied first surface liner; A step of supplying the second surface liner from the third side; and A step of forming a double-sided corrugated board by joining the other side of a single-sided corrugated board, on which the first surface liner is joined to one side, and the supplied second surface liner to each other; A method for manufacturing a double-sided corrugated sheet including
  6. A method for manufacturing a double-sided corrugated sheet according to claim 5, characterized by additionally including the step of guiding the heat-bonded double-sided corrugated sheet toward the discharge port while supporting or maintaining it in the bonded state.

Description

Apparatus and method for manufacturing double-sided corrugated board sheets The present invention relates to an apparatus and method for manufacturing double-sided corrugated cardboard sheets that can be manufactured at a single station without separate adhesive application and drying devices, and furthermore, in which the corrugated cardboard itself has cushioning, waterproofing, and cooling functions. Generally, conventional packaging boxes have been made of double-sided corrugated cardboard to facilitate the storage and transportation of goods. Generally, corrugated cardboard is broadly classified into single-sided corrugated cardboard (i.e., composed of two sheets of base paper) in which a surface liner is bonded to one side of a corrugated core paper having ridges and corrugations formed thereon, and double-sided corrugated cardboard (i.e., composed of three sheets of base paper) in which a surface liner is additionally bonded to the other side of the single-sided corrugated cardboard. A conventional method for manufacturing double-sided corrugated cardboard, as illustrated in FIG. 1(a), involves a pair of interlocking rollers (2a, 2b) rotating together to form ridges and valleys on a supplied corrugated core (1). Next, a first adhesive application roller (4a) applies adhesive to the ridges formed on one side of the corrugated core (1). Then, a pressure belt (6) rotating through a pair of rollers (6a, 6b) presses an additionally supplied surface liner (1') against one side of the corrugated core (1) to which the adhesive has been applied in the direction of the arrow, thereby manufacturing a single-sided corrugated cardboard (1a) [single facer]. As shown in FIG. 1(b), the above single-sided corrugated cardboard (1a) is supplied continuously again, and the second adhesive application roll (4b) applies adhesive again to the ridge formed on the other side of the single-sided corrugated cardboard (1a). Then, the heat-tightening part (8) heat-presses the additionally supplied surface liner (1'') onto the other side of the corrugated core sheet to which the adhesive has been applied, thereby finally manufacturing a double-sided corrugated cardboard (1b) [double facer]. As such, conventional methods for manufacturing corrugated cardboard must include single facers and double facers that are carried out continuously in separate spaces and facilities, which requires a large installation space for the device. Additionally, there were problems that increased device costs and reduced work efficiency due to the adhesive application and adhesive drying processes required for each single facer and double facer. In particular, conventional adhesive dispensing devices consist of rollers that rotate in engagement with the ridges of the corrugated cardboard, thereby applying adhesive only to the ridges; however, there was a problem in that excessive costs were incurred for maintaining the viscosity and temperature of the adhesive required to continuously and uniformly apply the adhesive to the corrugated cardboard. FIGS. 1(a) and FIGS. 2(a) are cross-sectional views illustrating a single facer and a double facer, respectively, according to the prior art. FIG. 2 is a cross-sectional view illustrating a double-sided corrugated sheet manufacturing apparatus (100) according to one embodiment of the present invention. FIG. 3(a) is a cross-sectional view illustrating a cross-section of a double-sided corrugated sheet manufactured by the manufacturing apparatus of the present invention. FIG. 4 is a process flow diagram of a method for manufacturing a double-sided corrugated sheet according to one embodiment of the present invention. Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings. FIG. 2 is a cross-sectional view illustrating a double-sided corrugated sheet manufacturing apparatus (100) according to one embodiment of the present invention. Referring to FIG. 2, the present invention provides a device for manufacturing a double-sided corrugated sheet at a single station without a separate adhesive application device and an adhesive drying device. A manufacturing device (100) for a double-sided corrugated sheet according to one embodiment of the present invention comprises: a corrugated core supply device (not shown) for supplying a corrugated core (101); a first surface liner supply device (not shown) for supplying a first surface liner (102a); a second surface liner supply device (not shown) for supplying a second surface liner (102b); a first roller (110a) and a second roller (110b) configured to rotate by interlocking with each other, wherein the first roller (110a) and the second roller (110b) are configured to heat-press the corrugated core (101) so that the corrugated core (101) is formed with crests and valleys at regular intervals and curves are formed. The apparatus is configured to include: a third roller (120) which is formed with a flat surfac