WO2009082105A2 - Apparatus for lengthening the length for resin panels - Google Patents

Apparatus for lengthening the length for resin panels Download PDF

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Publication number
WO2009082105A2
WO2009082105A2 PCT/KR2008/007311 KR2008007311W WO2009082105A2 WO 2009082105 A2 WO2009082105 A2 WO 2009082105A2 KR 2008007311 W KR2008007311 W KR 2008007311W WO 2009082105 A2 WO2009082105 A2 WO 2009082105A2
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WO
WIPO (PCT)
Prior art keywords
roller
unit
resin panel
roller unit
frictional resistance
Prior art date
Application number
PCT/KR2008/007311
Other languages
French (fr)
Other versions
WO2009082105A3 (en
Inventor
Sung Ho Bae
Original Assignee
Bae, Hee Jung
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bae, Hee Jung filed Critical Bae, Hee Jung
Publication of WO2009082105A2 publication Critical patent/WO2009082105A2/en
Publication of WO2009082105A3 publication Critical patent/WO2009082105A3/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
    • B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/18—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets by squeezing between surfaces, e.g. rollers

Definitions

  • the present invention relates to an apparatus for lengthening resin panels, and more particularly, to an apparatus for lengthening resin panels that enables a resin panel to be freely bent while being conveyed, due to a lack of elasticity thereof from being stretched through a difference in rotating speed of a first roller unit and a second roller unit, by disposing the first roller unit with a pair of slowly rotating rollers separated (by a predetermined distance along the conveying direction of the resin panel) from the second roller unit with a pair of quickly rotating rollers, and a frictional resistance unit provided therebetween that applies friction to the resin panel.
  • Resin panels to which the present invention is applied may be formed of chemical textiles, polyethylene (PE), polypropylene (PP), ethylene- vinyl acetate copolymer (EVA), or any combination thereof, and due to their elasticity and ability to be freely bent, they are largely used as hat visors, and are also used in many other applications.
  • PE polyethylene
  • PP polypropylene
  • EVA ethylene- vinyl acetate copolymer
  • the circular plate resin panel is stretched by 600% or more in length using a predetermined apparatus (referred to as a lengthening device in the art), so that its width and thickness are reduced accordingly, and a freely bendable resin panel without elasticity is made.
  • a predetermined apparatus referred to as a lengthening device in the art
  • Resin panels are also press-formed from the onset to a desired thickness and applied to products.
  • a resin panel formed through such related art technology has elasticity and thus cannot be freely bent - that is, when the resin panel is folded to form a bend, it has a tendency to resume its original shape after a certain duration - so that it has the problem in that it is incapable of being freely bent.
  • an object of the present invention is to provide a lengthening apparatus for a resin panel, which, by disposing a first roller unit with a pair of slowly rotating rollers and a second roller unit with a pair of quickly rotating rollers in a conveying direction of a resin panel and providing a frictional resistance unit therebetween to apply friction to the resin panel so that the length of the resin panel is increased due to the resin panel being stretched from the difference in the rotating speeds of the first roller unit and the second roller unit while being conveyed, the effects can be derived of a large reduction in labor and processing costs from expedient lengthening processing of a resin panel that loses elasticity and bends freely, and improved competitiveness from being able to obtain resin panels of required thicknesses through controlling the speed differences between the respective roller units.
  • an apparatus for lengthening a resin panel including: a first roller unit provided with a pair of rollers disposed tightly above and below one another and axially rotated to slowly convey a resin panel with either surface of the resin panel tightly compressed; a frictional resistance unit that applies friction to the resin panel conveyed via the first roller unit; and a second roller unit provided with a pair of rollers disposed tightly above and below one another and axially rotated to quickly convey and pull the resin panel conveyed via the frictional resistance unit, with either surface of the resin panel tightly compressed again.
  • the resin panel may be rolled in an inverse S shape through rolling around a top outer periphery of the roller at a top of the first roller unit, passing between the rollers of the first roller unit, and rolling around a bottom outer periphery of the roller at a bottom of the first roller unit, to be conveyed to the frictional resistance unit.
  • the resin panel may be rolled in an S shape through rolling around a bottom outer periphery of the roller at a bottom of the second roller unit, passing between the rollers of the second roller unit, and rolling around a top outer periphery of the roller at a top of the second roller unit, to be conveyed downward to a next stage.
  • the resin panel may be rolled in a mountain shape over a top outer periphery of the frictional resistance unit through being discharged by the roller at a bottom of the first roller unit and conveyed upward, and then being conveyed downward again by the frictional resistance unit to where the roller at a bottom of the second roller unit is disposed.
  • the frictional resistance unit may be configured as a fixed rod disposed between the first and second roller units and above the rollers at the bottoms thereof.
  • a roller group may be formed as an assembly of the first roller unit, the frictional resistance unit, and the second roller unit is arranged continuously in plurality.
  • the lengthening apparatus may further include a heating unit provided between the roller groups to heat the conveyed resin panel.
  • the heating unit may be disposed proximately at either side of the resin panel, respectively, to heat either surface of the resin panel.
  • the roller groups may be separated a predetermined distance from one another and arranged in three parts as a first, second, and third roller group, and the heating unit may be disposed between the roller groups.
  • a speed ratio of the first roller unit and the second roller unit of the respective roller groups may be gradually increased.
  • the gradually increased speed ratios at the first roller unit and the second roller unit of the respective roller groups may be 1:3, 1:6, and 1:10 to gradually lengthen a length of the resin panel by 600%.
  • FIG. 1 is a perspective view of a lengthening apparatus for resin panels according to an embodiment of the present invention.
  • FIG. 2 is a perspective view showing a resin panel wound around a lengthening apparatus for resin panels according to an embodiment of the present invention.
  • FIG. 3 is a schematic view of a lengthening apparatus for resin panels according to an embodiment of the present invention.
  • FIG. 4 is a schematic view showing a lengthening apparatus for resin panels arranged in plurality according to an embodiment of the present invention.
  • FIG. 5 is a schematic view showing a modified example of a lengthening apparatus for resin panels according to an embodiment of the present invention. Best Mode for Carrying out the Invention
  • an apparatus for lengthening a resin panel includes: a first roller unit 10 provided with a pair of rollers 11 and 12 disposed tightly above and below one another and axially rotated to slowly convey a resin panel 5 with either surface of the resin panel 5 tightly compressed, a frictional resistance unit 20 that applies friction to the resin panel 5 conveyed via the first roller unit 10, and a second roller unit 30 provided with a pair of rollers 31 and 32 disposed tightly above and below one another and axially rotated to quickly convey and pull the resin panel 5 conveyed via the frictional resistance unit 20, with either surface of the resin panel 5 tightly compressed again.
  • Reference numerals 13 and 23 not described refer to pairs of vertical board-shaped support brackets that support the rollers 11 and 12 of the first roller unit 10 and the rollers 31 and 32 of the second roller unit 30, respectively, so that they are capable of axial rotation.
  • a new method for winding the resin panel 5 on the rollers is employed - for example, a resin panel 5 introduced to the first roller unit 10 is rolled in an inverse S shape through rolling around a top outer periphery of the roller 11 at a top of the first roller unit 10, passing between the rollers 11 and 12 of the first roller unit 10, and rolling around a bottom outer periphery of the roller 12 at a bottom of the first roller unit 10, to be conveyed to the frictional resistance unit 20, or, the resin panel 5 is rolled in an S shape through rolling around a bottom outer periphery of the roller 32 at a bottom of the second roller unit 30, passing between the rollers 31 and 32 of the second roller unit 30, and rolling around a top outer periphery of the roller 31 at a top of the second roller unit 30, to be conveyed downward to a next stage
  • the resin panel 5 is rolled in a mountain shape over a top outer periphery of the frictional resistance unit 20 (disposed between the first and second roller units 10 and 30) through being discharged by the roller 12 at a bottom of the first roller unit 10 and conveyed upward, and then being conveyed downward again by the frictional resistance unit 20 to where the roller 32 at a bottom of the second roller unit 30 is disposed - that is, the frictional resistance unit 20 is disposed between the first and second roller units 10 and 30 and is positioned above the bottom rollers 12 and 32 thereof, and it is configured as a fixed rod that enables the resin panel 5 to be easily conveyed while wound.
  • one way to achieve more reliable lengthening and increase lengthening efficiency is to arrange a plurality of the above sets in which the rotational speed ratios in each set are progressively increased to perform lengthening of the resin panel 5.
  • the present invention employs such a method, whereby the roller groups, as assemblies of the first roller unit 10, the frictional resistance unit 20, and the second roller unit 30, are separated a predetermined distance from one another and arranged in three parts as a first, second, and third roller group rl, r2, r3, and a separate heating unit 40 is disposed between the roller groups.
  • the heating unit 40 prevents cooling of the resin panel 5 during its conveyance from the previous roller group to the next roller group, to enable it to be lengthened while maintained at a continuously high temperature.
  • the heater 40 may be proximately disposed at either side of the resin panel 5, respectively.
  • the speed ratio of the first roller unit and the second roller unit of the respective roller groups rl, r2, r3 is gradually increased, and the gradually increased speed ratios at the first roller unit and the second roller unit of the respective roller groups rl, r2, r3 may be 1:3, 1:6, and 1:10, for example, to gradually lengthen a length of the resin panel 5 by 600%.
  • an extruded resin panel 5 is rolled in an inverse S shape from the top to the bottom of the top and bottom rollers 11 and 12 of the first roller unit 10, the resin panel engaged between the rollers 11 and 12 is conveyed at a speed corresponding to the rotational speed of the rollers 11 and 12 via the frictional resistance unit 20 toward the second roller unit 30, the resin panel is rolled in an S shape from the bottom to the top of the rollers 31 and 32 of the second roller unit 30, and the resin panel is conveyed at a speed corresponding to the rotational speed of the rollers 31 and 32 while engaged between the rollers 31 and 32.
  • the frictional resistance unit 20 disposed between the first and second roller units 10 and 30 prevents direct transfer of the high speed force from the second roller unit 30 to the first roller unit 10 to a certain degree, slippage of the resin panel 5 that can occur at the first roller unit 10 can be prevented, and a precise speed ratio between the two roller units can be maintained.
  • lengthening is performed through sequentially increasing the speed ratios in increments of each lengthening structure unit arranged in plurality, and the heating unit 40 is disposed between each of the units, respectively, to prevent cooling of the resin panel 5 and enable lengthening of the resin panel 5 to be easily performed.
  • FIG. 5 is a schematic view showing a modified example of a lengthening apparatus for resin panels according to an embodiment of the present invention, and here, a plurality of first roller units 10 and second roller units 3 are arranged and shown performing lengthening of a resin panel 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Laminated Bodies (AREA)

Abstract

The present invention relates to an apparatus for lengthening a resin panel, the apparatus including: a first roller unit (10); a frictional resistance unit (20); and a second roller unit (30). By thus disposing the first roller unit with a pair of slowly rotating rollers and the second roller unit with a pair of quickly rotating rollers, and providing the frictional resistance unit therebetween to apply friction to the resin panel so that the length of the resin panel is increased 600% due to the resin panel being stretched from the difference in the rotating speeds of the first roller unit and the second roller unit while being conveyed, the effects can be derived of a large reduction in labor and processing costs from expedient lengthening processing of a resin panel that loses elasticity and bends freely, and improved competitiveness from being able to obtain resin panels of required thicknesses through controlling the speed differences between the respective roller units.

Description

Description
APPARATUS FOR LENGTHENING THE LENGTH FOR RESIN
PANELS
Technical Field
[1] The present invention relates to an apparatus for lengthening resin panels, and more particularly, to an apparatus for lengthening resin panels that enables a resin panel to be freely bent while being conveyed, due to a lack of elasticity thereof from being stretched through a difference in rotating speed of a first roller unit and a second roller unit, by disposing the first roller unit with a pair of slowly rotating rollers separated (by a predetermined distance along the conveying direction of the resin panel) from the second roller unit with a pair of quickly rotating rollers, and a frictional resistance unit provided therebetween that applies friction to the resin panel. Background Art
[2] Resin panels to which the present invention is applied may be formed of chemical textiles, polyethylene (PE), polypropylene (PP), ethylene- vinyl acetate copolymer (EVA), or any combination thereof, and due to their elasticity and ability to be freely bent, they are largely used as hat visors, and are also used in many other applications.
[3] After manufacturing a basic circular plate through press-forming, in order to obtain a suitable thickness for a hat visor or other product, the circular plate resin panel is stretched by 600% or more in length using a predetermined apparatus (referred to as a lengthening device in the art), so that its width and thickness are reduced accordingly, and a freely bendable resin panel without elasticity is made.
[4] Resin panels are also press-formed from the onset to a desired thickness and applied to products.
Disclosure of Invention Technical Problem
[5] However, because such related art lengthening apparatuses for resin panels employ a method in which a resin panel is stretched while it is in a fixed state, much labor is expended by having to perform complex processes such as resetting after processing, and because such setting procedures are required, there is also the problem of reduced work efficiency overall on account of a slow work speed.
[6] While a method of press-forming with a predetermined thickness at the onset can obtain an accurate thickness, because a new press-forming process must be performed for each instance where a required thickness is needed, this work is cumbersome and has problems such as high expended cost.
[7] Further, a resin panel formed through such related art technology has elasticity and thus cannot be freely bent - that is, when the resin panel is folded to form a bend, it has a tendency to resume its original shape after a certain duration - so that it has the problem in that it is incapable of being freely bent.
[8] Devised to solve these problems, an object of the present invention is to provide a lengthening apparatus for a resin panel, which, by disposing a first roller unit with a pair of slowly rotating rollers and a second roller unit with a pair of quickly rotating rollers in a conveying direction of a resin panel and providing a frictional resistance unit therebetween to apply friction to the resin panel so that the length of the resin panel is increased due to the resin panel being stretched from the difference in the rotating speeds of the first roller unit and the second roller unit while being conveyed, the effects can be derived of a large reduction in labor and processing costs from expedient lengthening processing of a resin panel that loses elasticity and bends freely, and improved competitiveness from being able to obtain resin panels of required thicknesses through controlling the speed differences between the respective roller units. Technical Solution
[9] To achieve the above objects in accordance with the present invention, there is provided an apparatus for lengthening a resin panel, including: a first roller unit provided with a pair of rollers disposed tightly above and below one another and axially rotated to slowly convey a resin panel with either surface of the resin panel tightly compressed; a frictional resistance unit that applies friction to the resin panel conveyed via the first roller unit; and a second roller unit provided with a pair of rollers disposed tightly above and below one another and axially rotated to quickly convey and pull the resin panel conveyed via the frictional resistance unit, with either surface of the resin panel tightly compressed again.
[10] According to the lengthening apparatus according to the present invention, the resin panel may be rolled in an inverse S shape through rolling around a top outer periphery of the roller at a top of the first roller unit, passing between the rollers of the first roller unit, and rolling around a bottom outer periphery of the roller at a bottom of the first roller unit, to be conveyed to the frictional resistance unit.
[11] According to the lengthening apparatus according to the present invention, the resin panel may be rolled in an S shape through rolling around a bottom outer periphery of the roller at a bottom of the second roller unit, passing between the rollers of the second roller unit, and rolling around a top outer periphery of the roller at a top of the second roller unit, to be conveyed downward to a next stage.
[12] According to the lengthening apparatus according to the present invention, the resin panel may be rolled in a mountain shape over a top outer periphery of the frictional resistance unit through being discharged by the roller at a bottom of the first roller unit and conveyed upward, and then being conveyed downward again by the frictional resistance unit to where the roller at a bottom of the second roller unit is disposed.
[13] According to the lengthening apparatus according to the present invention, the frictional resistance unit may be configured as a fixed rod disposed between the first and second roller units and above the rollers at the bottoms thereof.
[14] According to the lengthening apparatus according to the present invention, a roller group may be formed as an assembly of the first roller unit, the frictional resistance unit, and the second roller unit is arranged continuously in plurality.
[15] The lengthening apparatus according to the present invention may further include a heating unit provided between the roller groups to heat the conveyed resin panel.
[16] According to the lengthening apparatus according to the present invention, the heating unit may be disposed proximately at either side of the resin panel, respectively, to heat either surface of the resin panel.
[17] According to the lengthening apparatus according to the present invention, the roller groups may be separated a predetermined distance from one another and arranged in three parts as a first, second, and third roller group, and the heating unit may be disposed between the roller groups.
[18] According to the lengthening apparatus according to the present invention, a speed ratio of the first roller unit and the second roller unit of the respective roller groups may be gradually increased.
[19] According to the lengthening apparatus according to the present invention, the gradually increased speed ratios at the first roller unit and the second roller unit of the respective roller groups may be 1:3, 1:6, and 1:10 to gradually lengthen a length of the resin panel by 600%.
Advantageous Effects
[20] As described above, in the lengthening apparatus for a resin panel according to the present invention, by thus disposing the first roller unit with a pair of slowly rotating rollers and the second roller unit with a pair of quickly rotating rollers in the conveying direction of the resin panel, and providing the frictional resistance unit therebetween to apply friction to the resin panel so that the length of the resin panel is increased 600% due to the resin panel being stretched from the difference in the rotating speeds of the first roller unit and the second roller unit while being conveyed, the effects can be derived of a large reduction in labor and processing costs from expedient lengthening processing of a resin panel that loses elasticity and bends freely, and improved competitiveness from being able to obtain resin panels of required thicknesses through controlling the speed differences between the respective roller units. Brief Description of Drawings
[21] FIG. 1 is a perspective view of a lengthening apparatus for resin panels according to an embodiment of the present invention.
[22] FIG. 2 is a perspective view showing a resin panel wound around a lengthening apparatus for resin panels according to an embodiment of the present invention.
[23] FIG. 3 is a schematic view of a lengthening apparatus for resin panels according to an embodiment of the present invention.
[24] FIG. 4 is a schematic view showing a lengthening apparatus for resin panels arranged in plurality according to an embodiment of the present invention.
[25] FIG. 5 is a schematic view showing a modified example of a lengthening apparatus for resin panels according to an embodiment of the present invention. Best Mode for Carrying out the Invention
[26] A description of the present invention will be provided below with reference to the drawings.
[27] As shown in FIGS. 1 to 4, an apparatus for lengthening a resin panel according to an embodiment of the present invention includes: a first roller unit 10 provided with a pair of rollers 11 and 12 disposed tightly above and below one another and axially rotated to slowly convey a resin panel 5 with either surface of the resin panel 5 tightly compressed, a frictional resistance unit 20 that applies friction to the resin panel 5 conveyed via the first roller unit 10, and a second roller unit 30 provided with a pair of rollers 31 and 32 disposed tightly above and below one another and axially rotated to quickly convey and pull the resin panel 5 conveyed via the frictional resistance unit 20, with either surface of the resin panel 5 tightly compressed again.
[28] Reference numerals 13 and 23 not described refer to pairs of vertical board-shaped support brackets that support the rollers 11 and 12 of the first roller unit 10 and the rollers 31 and 32 of the second roller unit 30, respectively, so that they are capable of axial rotation.
[29] Also, in order to maximally prevent occurrence of slippage of a resin panel 5 during its conveyance via the first and second roller units 10 and 20 in the lengthening apparatus according to the present invention, a new method for winding the resin panel 5 on the rollers is employed - for example, a resin panel 5 introduced to the first roller unit 10 is rolled in an inverse S shape through rolling around a top outer periphery of the roller 11 at a top of the first roller unit 10, passing between the rollers 11 and 12 of the first roller unit 10, and rolling around a bottom outer periphery of the roller 12 at a bottom of the first roller unit 10, to be conveyed to the frictional resistance unit 20, or, the resin panel 5 is rolled in an S shape through rolling around a bottom outer periphery of the roller 32 at a bottom of the second roller unit 30, passing between the rollers 31 and 32 of the second roller unit 30, and rolling around a top outer periphery of the roller 31 at a top of the second roller unit 30, to be conveyed downward to a next stage.
[30] In addition to its winding method, the resin panel 5 is rolled in a mountain shape over a top outer periphery of the frictional resistance unit 20 (disposed between the first and second roller units 10 and 30) through being discharged by the roller 12 at a bottom of the first roller unit 10 and conveyed upward, and then being conveyed downward again by the frictional resistance unit 20 to where the roller 32 at a bottom of the second roller unit 30 is disposed - that is, the frictional resistance unit 20 is disposed between the first and second roller units 10 and 30 and is positioned above the bottom rollers 12 and 32 thereof, and it is configured as a fixed rod that enables the resin panel 5 to be easily conveyed while wound.
[31] Here, while the frictional resistance unit 20 in a fixed state applies friction to the surface of the resin panel 5 disposed and conveyed between the first and second roller units 10 and 30, the resin panel 5 receives frictional resistance for a braking effect, so that the direct transfer of stretching force of the resin panel 5 by rotational force from the second roller unit 30 to the first roller unit 10 can be somewhat restricted by means of this braking effect.
[32] Specifically, if the rotational force of the second roller unit 30 is transferred directly to the first roller unit 10, the stretching force of the second roller unit 30 is directly transferred to the first roller unit 10 by means of the different rotational forces of the two roller units, and unforeseen slippage of the resin panel 5 can occur between the rollers 11 and 12 of the first roller unit 10, so that here, by applying a predetermined braking through frictional resistance of the resin panel 5 on the frictional resistance unit 20, such occurrence of slippage can largely be prevented.
[33] By thus making the rotational speeds of the rollers of the first roller unit 10 different from those of the second roller unit 20 - for example, by maintaining the rotational speed of the rollers 11 and 12 of the first roller unit 10 in mutually engaging directions (that is, a clockwise axial rotating direction for the top roller 11 and a counterclockwise axial rotating direction for the bottom roller 12, as shown in the drawings) at a rotational speed of 100 rpm, for example, and conveying the resin panel 5 to the second roller unit 30, and by maintaining the rotational speed of the rollers 31 and 32 of the second roller unit 30 in mutually engaging directions (that is, a counterclockwise axial rotating direction for the bottom roller 32 and a clockwise axial rotating direction for the top roller 31, as shown in the drawings) at a rotational speed of 400 rpm, for example, the length of the resin panel 5 is extended during the process in which the pulling speed on the resin panel 5 is four times that of its conveyed speed from the first roller unit 10, resulting in a lengthening effect. [34] Here, not only can the rotational speed ratio be applied to obtain a desired thickness of the resin panel 5, but it can also be applied in various ways to obtain new types of resin panels 5 that can be freely bent due to a lack of elasticity.
[35] In other words, the greater the rotational speed ratio (that is, the higher the rotational speed at the second roller unit 30 when compared to that at the first roller unit 10), the greater the lengthening rate becomes.
[36] While a resin panel 5 can be lengthened only with a single set of the first roller unit
10, the frictional resistance unit 20, and the second roller unit 30, one way to achieve more reliable lengthening and increase lengthening efficiency is to arrange a plurality of the above sets in which the rotational speed ratios in each set are progressively increased to perform lengthening of the resin panel 5.
[37] The present invention employs such a method, whereby the roller groups, as assemblies of the first roller unit 10, the frictional resistance unit 20, and the second roller unit 30, are separated a predetermined distance from one another and arranged in three parts as a first, second, and third roller group rl, r2, r3, and a separate heating unit 40 is disposed between the roller groups.
[38] Here, the heating unit 40 prevents cooling of the resin panel 5 during its conveyance from the previous roller group to the next roller group, to enable it to be lengthened while maintained at a continuously high temperature.
[39] Also, in order to increase the heating effect of the resin panel 5 - that is, in order to heat either surface of the resin panel 5 - the heater 40 may be proximately disposed at either side of the resin panel 5, respectively.
[40] Also, the speed ratio of the first roller unit and the second roller unit of the respective roller groups rl, r2, r3 is gradually increased, and the gradually increased speed ratios at the first roller unit and the second roller unit of the respective roller groups rl, r2, r3 may be 1:3, 1:6, and 1:10, for example, to gradually lengthen a length of the resin panel 5 by 600%.
[41] With a thus-configured lengthening apparatus for resin panels according to the present invention, an extruded resin panel 5 is rolled in an inverse S shape from the top to the bottom of the top and bottom rollers 11 and 12 of the first roller unit 10, the resin panel engaged between the rollers 11 and 12 is conveyed at a speed corresponding to the rotational speed of the rollers 11 and 12 via the frictional resistance unit 20 toward the second roller unit 30, the resin panel is rolled in an S shape from the bottom to the top of the rollers 31 and 32 of the second roller unit 30, and the resin panel is conveyed at a speed corresponding to the rotational speed of the rollers 31 and 32 while engaged between the rollers 31 and 32.
[42] Here, if the difference in rotational speed between the rollers of the first roller unit 10 and those of the second roller unit 30 - that is, if the rotational speed of the second roller unit 30 is selectively raised 2 - 4 times (for example) that of the first roller unit 10 - a pulling effect relative to the speed difference occurs at the second roller unit 30 to pull the resin panel 5 from the first roller unit 30, so that the resin panel 5 is lengthened.
[43] Because the frictional resistance unit 20 disposed between the first and second roller units 10 and 30 prevents direct transfer of the high speed force from the second roller unit 30 to the first roller unit 10 to a certain degree, slippage of the resin panel 5 that can occur at the first roller unit 10 can be prevented, and a precise speed ratio between the two roller units can be maintained.
[44] Further, lengthening is performed through sequentially increasing the speed ratios in increments of each lengthening structure unit arranged in plurality, and the heating unit 40 is disposed between each of the units, respectively, to prevent cooling of the resin panel 5 and enable lengthening of the resin panel 5 to be easily performed.
[45] FIG. 5 is a schematic view showing a modified example of a lengthening apparatus for resin panels according to an embodiment of the present invention, and here, a plurality of first roller units 10 and second roller units 3 are arranged and shown performing lengthening of a resin panel 5.

Claims

Claims
[1] An apparatus for lengthening a resin panel, comprising: a first roller unit (10) provided with a pair of rollers (11, 12) disposed tightly above and below one another and axially rotated to slowly convey a resin panel
(5) with either surface of the resin panel (5) tightly compressed; a frictional resistance unit (20) that applies friction to the resin panel (5) conveyed via the first roller unit (10); and a second roller unit (30) provided with a pair of rollers (31, 32) disposed tightly above and below one another and axially rotated to quickly convey and pull the resin panel (5) conveyed via the frictional resistance unit (20), with either surface of the resin panel (5) tightly compressed again.
[2] The apparatus of claim 1, wherein the resin panel (5) is rolled in an inverse (S) shape through rolling around a top outer periphery of the roller (11) at a top of the first roller unit (10), passing between the rollers (11, 12) of the first roller unit (10), and rolling around a bottom outer periphery of the roller (12) at a bottom of the first roller unit (10), to be conveyed to the frictional resistance unit (20).
[3] The apparatus of claim 1, the resin panel (5) is rolled in an (S) shape through rolling around a bottom outer periphery of the roller (32) at a bottom of the second roller unit (30), passing between the rollers (31, 32) of the second roller unit (30), and rolling around a top outer periphery of the roller (31) at a top of the second roller unit (30), to be conveyed downward to a next stage.
[4] The apparatus of claim 1, wherein the resin panel (5) is rolled in a mountain shape over a top outer periphery of the frictional resistance unit (20) through being discharged by the roller (12) at a bottom of the first roller unit (10) and conveyed upward, and then being conveyed downward again by the frictional resistance unit (20) to where the roller (32) at a bottom of the second roller unit (30) is disposed.
[5] The apparatus of claim 4, wherein the frictional resistance unit (20) is configured as a fixed rod disposed between the first and second roller units (10, 30) and above the rollers (12, 32) at the bottoms thereof.
[6] The apparatus of claim 1, wherein a roller group formed as an assembly of the first roller unit (10), the frictional resistance unit (20), and the second roller unit (30) is arranged continuously in plurality.
[7] The apparatus of claim 6, further comprising a heating unit (40) provided between the roller groups to heat the conveyed resin panel (5).
[8] The apparatus of claim 7, wherein the heating unit (40) is disposed proximately at either side of the resin panel (5), respectively, to heat either surface of the resin panel (5).
[9] The apparatus of claim 7, wherein the roller groups are separated a predetermined distance from one another and arranged in three parts as a first, second, and third roller group (rl, r2, r3), and the heating unit (40) is disposed between the roller groups.
[10] The apparatus of claim 9, wherein a speed ratio of the first roller unit and the second roller unit of the respective roller groups (rl, r2, r3) is gradually increased.
[11] The apparatus of claim 10, wherein the gradually increased speed ratios at the first roller unit and the second roller unit of the respective roller groups (rl, r2, r3) are 1:3, 1:6, and 1:10 to gradually lengthen a length of the resin panel (5) by 600%.
PCT/KR2008/007311 2007-12-20 2008-12-10 Apparatus for lengthening the length for resin panels WO2009082105A2 (en)

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KR1020070134565A KR101206829B1 (en) 2007-12-20 2007-12-20 Apparatus for lengthening the length for resin panels
KR10-2007-0134565 2007-12-20

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WO2011057929A1 (en) * 2009-11-10 2011-05-19 Windmöller & Hölscher Kg Device and method for longitudinally stretching a film web
CN104023943A (en) * 2011-11-03 2014-09-03 温德莫勒及霍尔希尔公司 Stretching device and method for elongating a film web

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KR102108217B1 (en) * 2019-02-22 2020-05-28 에스티에스 주식회사 A Transferring Apparatus for a Pallet Supplying an Element

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KR20070086496A (en) * 2004-12-22 2007-08-27 킴벌리-클라크 월드와이드, 인크. Machine and cross-machine direction elastic materials and methods of making same

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WO2011057929A1 (en) * 2009-11-10 2011-05-19 Windmöller & Hölscher Kg Device and method for longitudinally stretching a film web
CN104023943A (en) * 2011-11-03 2014-09-03 温德莫勒及霍尔希尔公司 Stretching device and method for elongating a film web
CN104023943B (en) * 2011-11-03 2017-03-15 温德莫勒及霍尔希尔公司 Stretching-machine and the method for extension film band

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KR20090066852A (en) 2009-06-24
WO2009082105A3 (en) 2009-09-11

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