JP5531706B2 - Embossed decorative sheet manufacturing apparatus and embossed decorative sheet manufacturing method - Google Patents

Description

  The present invention relates to an embossed decorative sheet manufacturing apparatus and an embossed decorative sheet manufacturing method, and more particularly to an embossed decorative sheet manufacturing apparatus and an embossed decorative sheet manufacturing method capable of preventing wrinkles from occurring on the sheet.

  The embossed decorative sheet is a thermoplastic resin sheet having a concavo-convex pattern formed on the surface thereof, and is used by adhering to various furniture and building interior materials for the purpose of decoration or surface protection.

  Conventionally, when manufacturing such an embossed decorative sheet, a concavo-convex pattern is formed on the sheet by the following processes. That is, first, a sheet (without unevenness) is heated with a heater, and the temperature of the sheet is raised to the softening temperature of the thermoplastic resin. Subsequently, in a state where the sheet is heated to the softening temperature, the sheet is sent between the embossing roll and the pressure roll to be pinched. At this time, an uneven pattern is formed on the sheet surface. Finally, the sheet is cooled with a cooling roll.

  As an apparatus for producing such an embossed decorative sheet, for example, a device described in Patent Document 1-2 is known. Among these, Patent Document 1 arranges a heater group composed of a plurality of high-temperature heaters whose amount of heat is increased stepwise along a sheet conveyance path from a metal roll to a rubber roll. Since the sheet is gradually heated and the sheet S is gradually stretched along with the heating, an embossed decorative sheet without wrinkles can be obtained even when conveyed at high speed.

  Further, Patent Document 2 uses an endless belt conveyor as the sheet conveying means that reaches the embossing section, and the inclination of the endless belt conveyor is stepped from a gentle inclination to a steep inclination from the upstream side to the downstream side in the sheet conveying direction. It has been changed.

JP 11-48336 A Japanese Patent Laid-Open No. 11-138632

  By the way, in the conventional embossing decorative sheet manufacturing apparatus, a sheet made of a thermoplastic resin comes into contact with a pressure roll while being heated to a softening temperature. For this reason, the heated sheet is easily adhered to the pressure roll. For this reason, when the sheet comes out between the embossing roll and the pressure roll, the sheet is pulled to the pressure roll side, which may cause wrinkling of the sheet.

  On the other hand, it is conceivable to reduce the sheet conveyance speed. In this case, although there is an effect of suppressing wrinkles, there arises a problem that production efficiency is lowered. It is also conceivable to perform tension control in order to suppress wrinkles. However, when the sheet is heated to the softening temperature of the thermoplastic resin, it is difficult to use such tension control because the sheet may be broken.

  The present invention has been made in consideration of such points, and after being sandwiched between the embossing roll and the pressure roll, the sheet is prevented from being pulled toward the pressure roll, thereby preventing the sheet from being pulled. An object of the present invention is to provide an embossed decorative sheet manufacturing apparatus and an embossed decorative sheet manufacturing method capable of preventing the occurrence of wrinkles.

The present invention provides an apparatus for manufacturing an embossed decorative sheet, a heating device that heats the sheet, an embossing roll that is provided on the downstream side of the heating device and has a concavo-convex pattern formed on the surface, and a position that faces the embossing roll. A pressure roll that sandwiches the heated sheet with the embossing roll to form a concavo-convex pattern on the sheet, and moves between the embossing roll and the pressure roll while closely contacting the sheet. Producing an embossed decorative sheet, characterized in that a guide belt for guiding the shaped sheet to the embossing roll side is provided , and two guide belts are provided, each being arranged at a position corresponding to an end in the width direction of the sheet. Device.

  The present invention is an embossed decorative sheet manufacturing apparatus in which a groove for accommodating a guide belt is formed along a circumferential direction in a pressure roll.

  The present invention is the embossed decorative sheet manufacturing apparatus, wherein the guide belt moves along with the embossing roll along the surface of the embossing roll.

The embossed decorative sheet according to the present invention is characterized in that the guide belt is stretched around the pressure roll, and the guide belt moves together with the pressure roll along the surface of the pressure roll before closely contacting the sheet. It is a manufacturing apparatus.

  The present invention is the embossed decorative sheet manufacturing apparatus, wherein the guide belt is an endless belt.

  The present invention is an embossed decorative sheet manufacturing apparatus in which a belt feed roll for pulling the guide belt away from the sheet is provided at a position adjacent to the embossing roll.

The present invention relates to a method for producing an embossed decorative sheet, wherein the heating is performed between the step of heating the sheet, an embossing roll having a concavo-convex pattern formed on the surface, and a pressure roll provided at a position facing the embossing roll. And embossing the shaped sheet using a guide belt that moves while adhering to the sheet between the embossing roll and the pressure roll. The embossed decorative sheet manufacturing method is characterized in that two guide belts are provided and are arranged at positions corresponding to the widthwise ends of the sheet.

  According to the present invention, since the guide belt is provided between the embossing roll and the pressure roll so as to move while closely contacting the sheet and guide the shaped sheet to the embossing roll side, the embossing roll and the pressure roll The sheet is not pulled toward the pressure roll side after being sandwiched between the sheets, and it is possible to prevent the sheet from being wrinkled.

The schematic side view which shows the manufacturing apparatus of the embossing decorative sheet by one embodiment of this invention. The perspective view which shows the manufacturing apparatus of the embossing decorative sheet by one embodiment of this invention. Sectional drawing which shows an embossing roll. The figure which shows the state which a guidance belt guides a sheet | seat to the embossing roll side between an embossing roll and a pressure roll. The schematic side view which shows the modification of the manufacturing apparatus of an embossing decorative sheet. The schematic side view which shows the modification of the manufacturing apparatus of an embossing decorative sheet. The figure which shows the comparative example of the manufacturing apparatus of an embossing decorative sheet.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 6 are diagrams showing an embodiment of the present invention.

  First, the configuration of the embossed decorative sheet manufacturing apparatus according to the present embodiment will be described with reference to FIGS. 1 and 2.

  As shown in FIGS. 1 and 2, an embossed decorative sheet manufacturing apparatus 10 according to the present embodiment is for manufacturing an embossed decorative sheet by forming a concavo-convex pattern on a sheet 20 made of a thermoplastic resin. is there.

  The embossed decorative sheet manufacturing apparatus 10 is provided at a position facing the embossing roll 12, a heating apparatus 11 that heats the sheet 20 being conveyed, an embossing roll 12 that is provided on the downstream side of the heating apparatus 11. The pressure roll 13 is provided.

  Among these, the heating device 11 includes a plurality of heaters 14 and a heater box 15 that houses these heaters 14. As the heater 14, a far red heater, a near red heater, a ceramic heater, or the like can be used.

  The embossing roll 12 has a cylindrical shape, and a concavo-convex pattern 12 a corresponding to the concavo-convex pattern formed on the sheet 20 is formed on the surface thereof. The embossing roll 12 sandwiches the sheet 20 heated by the heating device 11 with the pressure roll 13, thereby transferring the concavo-convex pattern 12 a to the sheet 20, thereby providing the concavo-convex pattern on the sheet 20. Is shaped.

  And the sheet | seat 20 in which the uneven | corrugated pattern was shaped with the embossing roll 12 and the press roll 13 is conveyed along the embossing roll 12 surface, and is guided by the metal roll 17 arrange | positioned adjacent to the embossing roll 12 after that. Sent downstream.

  By the way, as a material of the sheet 20, polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, polyethylene terephthalate, polycarbonate, nylon (registered trademark), polystyrene, ethylene vinyl acetate copolymer, ethylene vinyl alcohol copolymer, etc. These thermoplastic resins can be mentioned. Moreover, the sheet | seat 20 may consist of not only what consists of one layer but the laminated body containing a some synthetic resin layer. Although the thickness of this sheet | seat 20 is not limited, For example, it can be set as 50 micrometers-400 micrometers.

  As the embossing roll 12, for example, a metal roll can be used. Specifically, examples of the embossing roll 12 include a metal roll in which nickel is plated around a stainless steel roll.

  On the other hand, the embossing roll 12 has a structure in which cooling water for surface cooling circulates. That is, as shown in FIG. 3, a cooling water inlet 12 b is provided at the center of one end in the longitudinal direction of the embossing roll 12, and a cooling water outlet 12 c is provided at the circumferential outer side of one end in the longitudinal direction of the embossing roll 12. ing. And the cooling water introduced from the cooling water inlet 12b goes from the longitudinal direction one end part of the embossing roll 12 to a longitudinal direction other end part, returns to a longitudinal direction one end side again after that, and is discharged | emitted from the cooling water outlet 12c. It has become.

  Further, the pressure roll 13 has a cylindrical shape, and can be composed of, for example, a rubber roll. As with the embossing roll 12, the pressure roll 13 may have a structure in which cooling water for surface cooling circulates inside.

  In the present embodiment, a guide belt 16 is disposed between the embossing roll 12 and the pressure roll 13. The guide belt 16 moves with the sheet 20 while being in close contact with the sheet 20 between the embossing roll 12 and the pressure roll 13, and plays a role of guiding the shaped sheet 20 to the embossing roll 12 side.

  The guide belt 16 is an endless belt, and is stretched around the pressure roll 13, the belt feed roll 18, and the belt guide roll 19. Of these, the belt feed roll 18 is provided at a position adjacent to the embossing roll 12, and plays a role of pulling the guide belt 16 away from the sheet 20. The belt guide roll 19 serves to guide the guide belt 16 from the belt feed roll 18 to the pressure roll 13.

  In this case, the guide belt 16 is sent from the belt guide roll 19 to the pressure roll 13 side, moves along with the pressure roll 13 along the surface of the pressure roll 13, and between the embossing roll 12 and the pressure roll 13. To reach. Further, the guide belt 16 moves along with the embossing roll 12 and the sheet 20 along the surface of the embossing roll 12, and then is separated from the sheet 20 by the belt feeding roll 18 and sent to the belt guide roll 19 side. In this way, the guide belt 16 circulates around the pressure roll 13, the belt feed roll 18, and the belt guide roll 19.

  On the other hand, as shown in FIG. 2, two guide belts 16 are provided. Each guide belt 16 is disposed at a position corresponding to an end portion in the width direction of the sheet 20.

  Two grooves 21 are formed in the vicinity of both ends of the pressure roll 13 along the circumferential direction. Each groove 21 is provided at a position corresponding to an end in the width direction of the sheet 20 and can accommodate the guide belt 16 corresponding to the inside of each groove 21. The depth of each groove 21 is substantially the same as the thickness of the guide belt 16. Therefore, when the guide belt 16 is accommodated in the groove 21, the surface of the guide belt 16 is substantially flush with the surface of the pressure roll 13.

  The reason why the guide belt 16 is provided at both ends in the width direction of the sheet 20 is as follows. That is, the phenomenon that the sheet 20 is pulled between the embossing roll 12 and the pressure roll 13 and then pulled to the pressure roll 13 side is considered to occur mainly at both ends in the width direction of the sheet 20. Therefore, when it is intended to prevent the sheet 20 from being pulled to the pressure roll 13 side, it is considered sufficient to guide only the both ends in the width direction of the sheet 20 to the embossing roll 12 side by the guide belt 16. is there.

  Examples of the material of the induction belt 16 include metals, synthetic resins such as Teflon (registered trademark), and rubber. In particular, the guide belt 16 is preferably made of a material that the sheet 20 is difficult to adhere to, and for example, a belt subjected to surface treatment such as fluorine coating is preferably used. The guide belt 16 can have a thickness of, for example, 5 mm to 10 mm, and a width of, for example, 10 mm to 100 mm.

  Next, the operation of the present embodiment having such a configuration will be described.

  First, the conveyed sheet 20 is heated by the heating device 11. At this time, the sheet 20 made of the thermoplastic resin is heated to near its melting point.

  The heated sheet 20 is conveyed downstream and reaches between the embossing roll 12 and the pressure roll 13. Next, the sheet 20 is sandwiched between the embossing roll 12 and the pressure roll 13, and a concavo-convex pattern is formed on the sheet 20 by the concavo-convex pattern 12 a of the embossing roll 12.

  Subsequently, the sheet | seat 20 in which the uneven | corrugated pattern was shaped moves along the embossing roll 12 surface. At this time, the guide belt 16 moves with the sheet 20 while being in close contact with the sheet 20 between the embossing roll 12 and the pressure roll 13 (see FIG. 4). Therefore, the shaped sheet 20 is reliably guided not to the pressure roll 13 side but to the embossing roll 12 side. At this time, the moving speeds of the sheet 20, the embossing roll 12, and the guide belt 16 are the same.

  Subsequently, the sheet 20 moves along the surface of the embossing roll 12, while the sheet 20 is cooled by the cooling water flowing in the embossing roll 12. Thereby, the uneven pattern formed on the sheet 20 is fixed. On the other hand, the guide belt 16 moves along with the sheet 20 along the surface of the embossing roll 12, and is then separated from the embossing roll 12 and the sheet 20 by the belt feed roll 18.

  Next, the sheet 20 is guided by the metal roll 17 disposed adjacent to the embossing roll 12, pulled away from the embossing roll 12, and sent downstream. Thereafter, the sheet 20 may be further cooled by a cooling roll (not shown).

  As described above, according to the present embodiment, the guide belt 16 is provided between the embossing roll 12 and the pressure roll 13, and the guide belt 16 moves while being in close contact with the sheet 20. The sheet 20 is guided to the embossing roll 12 side. Thus, after the sheet 20 is nipped between the embossing roll 12 and the pressure roll 13, the sheet 20 is not pulled toward the pressure roll 13 side. As a result, the sheet 20 can be prevented from wrinkling.

  On the other hand, as shown in FIG. 7 as a comparative example, when the induction belt 16 is not provided between the embossing roll 12 and the pressure roll 13, the sheet 20 is pulled toward the pressure roll 13, and the sheet 20 Wrinkles may occur (see reference A in FIG. 7).

  Furthermore, according to the present embodiment, the two guide belts 16 are arranged at positions corresponding to the end portions in the width direction of the sheet 20, respectively. As described above, the phenomenon that the sheet 20 is pressed between the embossing roll 12 and the pressure roll 13 and then pulled to the pressure roll 13 side is considered to occur mainly at both ends in the width direction of the sheet 20. It is done. Therefore, by arranging the two guide belts 16 at both ends in the width direction of the sheet 20, it is possible to effectively and reliably prevent the sheet 20 from being pulled toward the pressure roll 13 side.

  Further, according to the present embodiment, since the groove 21 that accommodates the guide belt 16 is formed in the pressure roll 13 along the circumferential direction, there is no possibility that the guide belt 16 protrudes from the pressure roll 13. There is no influence on the shaping work by the embossing roll 12 and the pressure roll 13.

  Further, according to the present embodiment, each guide belt 16 is an endless belt, and a belt feed roll 18 that pulls the guide belt 16 away from the seat 20 is provided at a position adjacent to the embossing roll 12. Accordingly, there is no possibility that the guide belt 16 is pulled toward the embossing roll 12, and the guide belt 16 can be reliably conveyed to the belt feed roll 18 side.

  In addition, in the embodiment mentioned above, various deformation | transformation are possible within the range of the summary of this invention.

  That is, in this embodiment, the guide belt 16 is an endless belt. However, the present invention is not limited to this, and the guide belt 16 may be unwound from the unwinding roll 25 and wound by the winding roll 26 as shown in FIG.

  In the present embodiment, the guide belt 16 moves along the surfaces of the embossing roll 12 and the pressure roll 13. However, the guide belt 16 is not limited to the above-described configuration as long as it guides the sheet 20 to the embossing roll 12 side between the embossing roll 12 and the pressure roll 13.

  For example, as shown in FIG. 6, the guide belt 16 may be guided by belt guide rolls 27 and 28 so that the guide belt 16 does not move along the surfaces of the embossing roll 12 and the pressure roll 13.

  5 and FIG. 6, the same reference numerals are given to the same parts as those in the embodiment shown in FIG. 1 and FIG.

DESCRIPTION OF SYMBOLS 10 Embossing decorative sheet manufacturing apparatus 11 Heating apparatus 12 Embossing roll 13 Pressure roll 14 Heater 15 Heater box 16 Guide belt 17 Metal roll 18 Belt feed roll 19 Belt guide roll 20 Sheet 21 Groove

Claims (7)

In the embossed decorative sheet manufacturing equipment,
A heating device for heating the sheet;
An embossing roll provided on the downstream side of the heating device and having an uneven pattern formed on the surface;
A pressure roll that is provided at a position facing the embossing roll, presses the heated sheet with the embossing roll, and forms a concavo-convex pattern on the sheet,
Provided between the embossing roll and the pressure roll is a guide belt that moves while closely contacting the sheet and guides the shaped sheet to the embossing roll side ,
An apparatus for manufacturing an embossed decorative sheet, characterized in that two guide belts are provided and are arranged at positions corresponding to the end portions in the width direction of the sheet. A pressure roll, the embossed decorative sheet manufacturing apparatus according to claim 1, wherein a groove for accommodating the induction belt along the circumferential direction are formed. The apparatus for manufacturing an embossed decorative sheet according to claim 1 or 2 , wherein the guide belt moves along with the embossing roll along the surface of the embossing roll. Induction belt is hung around the pressure roll, the induction belts, one of the claims 1 to 3, characterized in that moves with pressure roller along the surface of the pressure roll before close contact with the sheet An apparatus for producing an embossed decorative sheet according to claim 1. The apparatus for producing an embossed decorative sheet according to any one of claims 1 to 4 , wherein the guide belt comprises an endless belt. The embossing decorative sheet manufacturing apparatus according to any one of claims 1 to 5, wherein a belt feeding roll for separating the guide belt from the sheet is provided at a position adjacent to the embossing roll. In the method for producing an embossed decorative sheet,
Heating the sheet;
Between the embossing roll having a concavo-convex pattern formed on the surface and a pressure roll provided at a position facing the embossing roll, sandwiching the heated sheet and shaping the concavo-convex pattern on the sheet;
Using an induction belt that moves while being in close contact with the sheet between the embossing roll and the pressure roll, and a step of guiding the shaped sheet to the embossing roll side ,
2. A method of manufacturing an embossed decorative sheet , comprising two guide belts, each of which is disposed at a position corresponding to an end in the width direction of the sheet.

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