BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic diagram showing a conventional system for manufacturing double-faced corrugated paperboards.
FIG. 2 is a schematic diagram, showing a system for manufacturing double-faced corrugated paperboards according to a first embodiment of the present invention.
FIG. 3 is a sectional view showing the duct member of FIG. 2. FIG. 4 is a top view showing the arrangement of the second hot plates of FIG. 2.
FIG. 5 is a front view showing the duct member of FIG. 2.
FIG. 6 is a schematic diagram showing a system for manufacturing double-raced corrugated paperboards according to a second embodiment of the present invention.
FIG. 7 is a sectional view showing the duct member of FIG. 6.
FIG. 8 is a front view showing the duct member of FIG. 6.
FIG. 9 is a schematic diagram showing a system for manufacturing double-faced corrugated paperboards according to a third embodiment of the present invention.
FIG. 10 is a schematic diagram showing a system for manufacturing double-faced corrugated paperboards according to a fourth embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The following descriptions are of exemplary embodiments only, and are not intended to limit the scope, applicability or configuration of the invention in any way. Rather, the following description provides a convenient illustration, for implementing exemplary embodiments of the invention. Various changes to the described embodiments may be made in the function and arrangement of the elements described without departing from the scope of the invention as set forth in the appended claims.
FIG. 2 is a schematic diagram showing a system for manufacturing double-faced corrugated paperboards according to a first embodiment of the present invention. As illustrated, the paperboards 140, 141, and the liner 142 are advanced over a number of hot plates 152 and then a number second hot plates 159. A number of guiding mils 231, 232, 233, and 234 are positioned so that the first cotton-weaved belt 150 is raised for an appropriate distance above the second hot plates 159, creating a dehumidifying space 23 for the moisture absorbed by the paperboard 30 during its travel through the hot plates 152 to evaporate. Please refer to FIG. 4 which is a top view showing the arrangement of the second hot plates 159. As illustrated, the second hot plates 159 are arranged into a number of parallel rows perpendicular to the direction of the advancement of the paperboard 30. An appropriate gap 1591 is preserved between every two adjacent rows and each second hot plate 159 has a number of appropriately spaced parallel grooves 1592 running aligned with the direction of the advancement of the paperboard 30. As shown in FIGS. 3 and 5, a duct member 21 is positioned within the dehumidifying space 23 above the second hot plates 159 and, when the paperboard 30 is advanced above the second plates 159, air is continuously introduced into the duct member 21. Because of the provision of the gaps 1591 and grooves 1592, turbulence is prevented and uniform air pressure is developed within the dehumidifying space 23, thereby pressing the paperboard 30 against the second hot plates 159 for continuous beating. In the mean time, foe steam can be expelled along with foe air flow. A double-faced corrugated paperboard of significantly lower water content is therefore obtained.
When the single-faced paperboards 140, 141, and the liner 142 are advanced by the first cotton-weaved belt 150 and pressed by the hold-down rolls 153 over and against the hot plates 152, they are adhered into the double-faced paperboard 30 which is continuously advanced into the dehumidifying space 23. Then, with the duct member 21 and the gaps 1591 and grooves 1592 as described above, the air flow removes rite extraneous water content from the paperboard 30 and the uniform pressure keeps the paperboard 30 flatly attached to the second hot plates 159 for continuous heating to maintain the adhesion among the paperboards 140, 141, and the liner 142. At last, accompanied with the advancement provided by the first cotton-weaved belt 150, the second cotton-weaved belt 160 running around the second from heft roll 161, foe second adjustment device 162, the guiding roll 163, and the second back, belt roll 164 delivers the completed double-faced corrugated paperboard 30 out of the platform 50. The paperboard 30 thus produced will not deform or bend from the surplus moisture and the adhesion among the paperboards 140, 141, and the liner 142 is much superior to that produced by foe conventional manufacturing system.
FIG. 6 is a schematic diagram showing a system for manufacturing double-faced corrugated paperboards according to a second embodiment of the present invention. This embodiment is similar to the previous one shown in FIG. 2 where a number of guiding rolls 231, 232, 233, and 234 are positioned so that the first cotton-weaved belt 150 is raised for an appropriate distance above a number of second hot plates 159 arranged in parallel rows behind the hot plates 152, creating a dehumidifying space 23 for the moisture absorbed by the paperboard 30 during its travel through the hot plates 152 to evaporate. The second hot plates 159 also have appropriate gaps 1591 therebetween and each second hot plate 159 has appropriately spaced grooves 1592 as in the previous embodiment. Then, as shown in FIGS. 7 and 8, a duct member 24 having a number fin-like channels 241 conducted through by a duct 242 with an outlet 25 is positioned beneath the second hot plates 159 such that each of the channels 241 has its opening aligned with a gap 1591. When air is drawn from the outlet 25 via the channels 241 and the gaps 1591, the paperboard 30 would be sucked towards and attached to the second hot plates 159. As such, the paperboard 30 is able to continue receiving heating from the second hot plates 159 while the moisture evaporates to the dehumidifying space 23.
FIG. 9 is a schematic diagram showing a system for manufacturing double-faced corrugated paperboards according to a third embodiment of the present invention. As illustrated, the platform 50 contains two advancing mechanisms 41 and 42, leaving an open dehumidifying space 23′ therebetween. Similar to the previous embodiments, a duct member 21 is positioned within the dehumidifying space 23′ above the second hot plates 159. The paperboards 140, 141, and the liner 142, after being pre-heated and applied with adhesives, are drawn into the platform 50 by the advancing mechanism 41. When the paperboard 30 passes through the open dehumidifying space 23′, the moisture absorbed within the advancing mechanism 41 is allowed to evaporate. Also under the air pressure provided by the duct member 21, the paperboard 30 is pressed tightly against the second hot plates 159 for continuous heating. At last, accompanied with the advancement provided by the advancing mechanism 42, the second cotton-weaved belt 160 running around the second front belt roll 161, the second adjustment device 162, the guiding roll 163, and the second back belt roll 164 delivers the completed double-faced corrugated paperboard 30 out of the platform 50.
FIG. 10 is a schematic diagram showing a system for manufacturing double-faced corrugated paperboards according to a fourth embodiment of the present invention. Unlike the previous third embodiment, a duct member 24 having a number fin-like channels 241 conducted through by a duct 242 with an outlet 25 is positioned beneath the second hot plates 159 such that each of the channels 241 has its opening aligned with a gap 1591. When air is drawn from the outlet 25 via the channels 241 and the gaps 1591, the paperboard 30 is sucked towards and attached to the second hot plates 159. As such, the paperboard 30 is able to continue receiving heating from the second hot plates 159 while the moisture evaporates to the open dehumidifying space 232′. At last, accompanied with the advancement provided by tire advancing mechanism 42, the second cotton-weaved belt 160 running around foe second front belt roll 161, the second adjustment device 162, the guiding roil 163, and the second back belt roll 164 delivers the completed double-faced corrugated paperboard 30 out of the platform 50.
It will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods differing from the type described above.
While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the spirit of the present invention.
Patent Application
20080047669
