CN118215581A

CN118215581A - Sublimation transfer device and method for manufacturing belt

Info

Publication number: CN118215581A
Application number: CN202280069518.3A
Authority: CN
Inventors: 大塚雅之; 野村稔; 浅野直矢
Original assignee: Hashima Co Ltd
Current assignee: Hashima Co Ltd
Priority date: 2021-10-21
Filing date: 2022-09-16
Publication date: 2024-06-18
Also published as: KR20240095218A; JP2023062464A; JP7007774B1; WO2023067964A1

Abstract

A belt (50) used in a sublimation transfer device (10) is a fabric (56) formed in such a manner that a plurality of gaps (57) are regularly present as sites surrounded by two warp yarns (54) adjacent to each other and two weft yarns (55) adjacent to each other. A coating film (53) is formed on the surface of the belt (50). The belt (50) has a plurality of through holes (58). The transmission hole (58) penetrates the band (50) at a portion corresponding to the plurality of gaps (57) and does not have the coating film (57).

Description

Sublimation transfer device and method for manufacturing belt

Technical Field

The present disclosure relates to a sublimation transfer device and a method of manufacturing a belt.

Background

For example, when sublimation dye printed on transfer paper is transferred to a cloth, the sublimation transfer device described in patent document 1 is used. The sublimation transfer device described in patent document 1 includes a heat-generating driving roller, a driven roller, and an endless belt. The heat-generating driving roller includes a heat source for sublimating sublimation dye printed on the transfer paper, and is rotatable by a motor. The endless belt is arranged on the heat-generating driving roller and the driven rollers. The endless belt has a conveying surface for conveying the transfer paper and the cloth in an overlapping manner, and a back surface on a side opposite to the conveying surface. The conveying surface is opposite to the roller surface of the heating driving roller. The back face is opposite to the roller face of the driven roller. The driven roller is configured such that the conveying surface of the endless belt can apply pressure to the roller surface of the heat-generating driving roller.

In the sublimation transfer device, the cloth is overlapped such that the non-printing surface faces the conveying surface of the endless belt. The transfer paper is overlapped such that the printing surface on which the sublimation dye is printed is opposed to the printing surface on the opposite side of the cloth from the non-printing surface. The endless belt is allowed to rotate integrally with the heat-generating drive roller via rotation of the driven roller. Thereby, the cloth and the transfer paper overlapped on the conveying surface of the endless belt are carried between the conveying surface and the roller surface of the heat-generating driving roller. In this case, the cloth and the transfer paper are pressurized by the endless belt against the heat-generating drive roller, and heated by the heat-generating drive roller. The sublimated dye sublimated by the pressurization and the heating moves toward the cloth, and the sublimated dye component is transferred to the cloth and fixed.

In the case of the endless belt described in patent document 1, a base material of silicone rubber is used to secure heat resistance. In addition, a non-stretchable member made of yarn, silk, or the like is embedded in the base material of silicone rubber. The non-stretchable members are arranged so as to extend parallel to the rotation direction of the endless belt. When the cloth and the transfer paper are conveyed, the non-stretchable member suppresses deformation of the rotating endless belt due to a force acting on the endless belt.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 2006-321056

Disclosure of Invention

Problems to be solved by the invention

The vaporized components other than the transferred dye components in the sublimated dye sublimated by the heating need to be transmitted from the conveying surface to the back surface of the endless belt so as not to remain on the cloth. This is because the vaporized component remains in the cloth, and fixation of the dye component to the cloth cannot be completed, so that transfer becomes insufficient and the outline becomes unclear, and the countermeasure is to suppress such a situation. That is, the endless belt employed in the sublimation transfer device is required to ensure heat resistance and suppress deformation occurring during rotation. In addition, the endless belt is required to allow the vaporized component to pass through from the transport surface to the back surface.

Means for solving the problems

One embodiment of the present disclosure provides a sublimation transfer device configured to transfer sublimation dye printed on transfer paper to a cloth. The sublimation transfer device is provided with: at least one drive roller configured to contain a heat source for sublimating the sublimation dye; at least one driven roller; and a belt which is formed by braiding the warp yarns and the weft yarns so that a plurality of gaps, which are portions surrounded by two warp yarns adjacent to each other and two weft yarns adjacent to each other, appear regularly by being installed on the driving roller and the driven roller so as to be allowed to rotate integrally with the driving roller through rotation of the driven roller, wherein the belt has a conveying surface which conveys the transfer paper and the cloth in a state of being overlapped and faces a roller surface of the driving roller, the driven roller is arranged so that the conveying surface can apply pressure to the roller surface, a resin coating film for ensuring heat resistance is formed on a surface of the belt including the conveying surface, and the belt has a plurality of penetration holes, which penetrate the belt at portions corresponding to the plurality of gaps and do not exist in the coating film.

In another aspect of the present disclosure, a method of manufacturing a belt for use in a sublimation transfer device configured to transfer sublimation dye printed on a transfer sheet to a cloth is provided. The sublimation dye sublimated by heat contains a dye component to be transferred to the cloth and a vaporization component other than the dye component, and the manufacturing method includes the steps of: a step of forming a fabric-made belt by weaving two warp yarns adjacent to each other and two weft yarns adjacent to each other in such a manner that a plurality of gaps occur regularly as sites surrounded by the warp yarns and the weft yarns; a step of forming a resin coating film for ensuring heat resistance on the surface of the belt; and a step of adjusting the film thickness of the coating film based on a first index indicating the degree of deformation of the belt with respect to a force acting on the belt and a second index indicating the degree of permeation of the vaporized component through the belt, wherein the film thickness is adjusted so as to form a plurality of permeation holes that penetrate the belt at portions corresponding to the plurality of gaps and where the coating film does not exist.

Drawings

Fig. 1 is a schematic view of a sublimation transfer device.

Fig. 2 is a perspective view of a conveyor belt of the sublimation transfer device of fig. 1.

Fig. 3 is an enlarged view of the surface of the conveyor belt of fig. 2.

Fig. 4 is a schematic view of the surface of the conveyor belt of fig. 3.

Fig. 5 is a cross-sectional view taken along line 5-5 of fig. 4.

Fig. 6 is a graph illustrating a relationship between film thickness and rigidity of a resin coating applied to the conveyor belt of fig. 2.

Fig. 7 is a graph illustrating a relationship between a film thickness and a transmittance of a resin coating applied to the conveyor belt of fig. 2.

Fig. 8 is a graph illustrating the relationship between the rigidity and the transmittance of the resin coating applied to the conveyor belt of fig. 2.

Detailed Description

A sublimation transfer device 10 according to an embodiment will be described.

As shown in fig. 1, the sublimation transfer device 10 is a continuous or rotary sublimation transfer device, and may be called a continuous sublimation transfer press device. The sublimation transfer device 10 transfers sublimation dye N printed on a transfer paper 11 to the surface of a cloth that is a raw material roll 12. The transfer paper 11 is, for example, a long paper or film prepared by the function of another printing device capable of printing the sublimation dye N. The sublimation dye N is, for example, a dye having a characteristic of sublimating in an environment of high temperature such as 200 ℃. The raw material roll 12 is, for example, a long cloth containing chemical fibers such as polyester fibers.

< Sublimation transfer device 10>

The sublimation transfer device 10 includes a frame 20, a driving roller 30, a plurality of driven rollers 40, and a conveyor belt 50. The frame 20 has a rectangular parallelepiped shape having a depth in the forward and backward directions of the paper surface in fig. 1. The frame 20 is configured to be movable with respect to the ground 13 on the lower side of the paper surface in fig. 1 via wheels 21. In the following description, the directions indicated by terms such as "upper" and "lower" are defined with reference to the gravitational direction. The forward and reverse directions of the paper surface in fig. 1, which are directions orthogonal to the "up and down direction", refer to the "width direction" of the chassis 20. The frame 20 is a base for assembling various structures including structures for realizing various functions of the sublimation transfer device 10, such as the driving roller 30, the driven roller 40, and the conveying belt 50.

The driving roller 30 is assembled to the upper portion of the frame 20. The driving roller 30 extends in the width direction of the frame 20. Both ends of the driving roller 30 are supported rotatably with respect to the frame 20. A driving source such as a motor, not shown, is connected to the driving roller 30. The driving roller 30 can be rotated by the driving force generated by the driving source. The driving roller 30 includes a heater portion 31 inside thereof. The heater portion 31 is provided inside the driving roller 30, that is, inside the roller surface 32. The roller surface 32 is heated to a high temperature by heat generated by the heater portion 31. The heater unit 31 is an example of a heat source for generating heat for sublimating the sublimation dye N.

For example, the number of driven rollers 40 is four. The driven roller 40 is assembled in the frame 20 at a position surrounding the driving roller 30. The driven roller 40 extends in the width direction of the frame 20. Both ends of the driven roller 40 are supported rotatably with respect to the frame 20. The driven roller 40 can be rotated by the rotational force transmitted from the driving roller 30. The driven roller 40 has a smaller diameter than the driving roller 30.

The driven roller 40 is arranged to surround the driving roller 30. Among the four driven rollers 40, the driven roller 40a is disposed uppermost. The driven rollers 40a, 40b, 40c, and 40d are arranged around the driving roller 30 in the clockwise direction in this order. The two driven rollers 40a, 40b are disposed above the rotation center of the driving roller 30. The driven roller 40c is disposed at the lowermost of the four driven rollers 40. The driven roller 40d is arranged such that the rotation center substantially coincides with the rotation center of the driving roller 30 in the up-down direction. The driven roller 40 is disposed such that the driving roller 30 is located in a region surrounded by a virtual line L connecting adjacent driven rollers to each other. A first end of the driven roller 40c is connected to the tension spring 41. The driven roller 40c is configured such that the position of the end thereof in the up-down direction is variable in accordance with the tension of the tension spring 41 or the change in position.

The conveyor belt 50 is mounted on the driving roller 30 and the driven roller 40. For example, the width of the conveyor belt 50 is a size that can cover most of the roller surfaces 32, 42 that are the outer peripheral surfaces of the rollers 30, 40. That is, the width of the conveyor belt 50 is smaller than the length of each roller 30, 40 extending in the width direction of the frame 20. The surface of the conveyor belt 50 includes a conveying surface 51 as a first surface and a rear surface 52 as a second surface opposite to the conveying surface 51. The conveying surface 51 faces the roller surface 32 of the driving roller 30, and the back surface 52 faces the roller surface 42 of the driven roller 40. That is, the two surfaces 51, 52 of the conveyor belt 50 are respectively opposite to the different roller surfaces 32, 42.

The conveyor belt 50 extends from the driven roller 40a to the driven roller 40d via two driven rollers 40b, 40 c. The conveyor belt 50 also extends from the driven roller 40d to the driving roller 30, and along the roller surface 32 of the driving roller 30 to the driven roller 40a. As a result, the portion of the conveyor belt 50 that is bridged between the driven rollers 40a, 40d of the driving roller 30 enters the region surrounded by the virtual line L. In this way, the conveying belt 50 is configured such that the conveying surface 51 can apply pressure to the driving roller 30, that is, the roller surface 32. The driven roller 40 is arranged so as to be capable of pressing the conveying surface 51 against the roller surface 32.

The frame 20 has a table 22. The table 22 is a flat plate extending in the horizontal direction from the carry-in port 20a, which is a portion between the driving roller 30 and the driven roller 40a, so as to be separated from the driven roller 40 a. The table 22 extends from the carry-in port 20a to a position beyond the driven roller 40 d. For example, the width of the table 22 is equal to the length of each of the rollers 30, 40 extending in the width direction of the frame 20.

As shown in fig. 1 in an enlarged manner, the transfer paper 11 and the raw material roll 12 are disposed in a superposed manner on a disposition surface 22a that is an upper surface of the table 22. The transfer paper 11 has a printing surface 11a on which the sublimation dye N is printed and a non-printing surface 11b on the opposite side of the printing surface 11 a. The raw material roll 12 has a printing surface 12a to which the sublimation dye N is transferred and a non-printing surface 12b on the opposite side of the printing surface 12 a. The transfer paper 11 is superimposed on the installation surface 22a so that the non-printing surface 11b faces. The raw material roll 12 is stacked on the printing surface 11a of the transfer paper 11 so that the printing surface 12a faces. The release paper 14 is superimposed on the non-printing surface 12b of the raw material roll 12.

The transfer paper 11 is wound in a roll shape with respect to a transfer paper roller 23a assembled to the frame 20. The transfer roller 23a extends in the width direction of the frame 20. The transfer roller 23a is disposed at a position facing an end of the table 22 opposite to the carry-in port 20 a. The raw material roll 12 is wound in a roll shape with respect to a raw material roll 24a assembled to the frame 20. The raw material roll 24a extends in the width direction of the frame 20. The raw material roll 24a is disposed above the end of the table 22 on the opposite side of the carry-in port 20 a. The release paper 14 is wound in a roll shape with respect to a release paper roller 25a assembled to the frame 20. The knock out roller 25a extends in the width direction of the frame 20. The knock-out roller 25a is disposed above the driven roller 40b in the frame 20.

< Procedure of sublimation transfer printing >

In fig. 1, in order to feed the transfer paper 11 so that the transfer paper 11 overlaps the installation surface 22a of the table 22, the transfer paper roller 23a rotates, for example, in a counterclockwise direction. In order to feed the raw material roll 12 so that the raw material roll 12 overlaps the transfer paper 11 overlapped on the installation surface 22a of the table 22, the raw material roll 24a rotates in a counterclockwise direction, for example. In order to feed the release paper 14 so that the release paper 14 overlaps the raw material roll 12 overlapped on the transfer paper 11, the release paper roller 25a rotates, for example, in the clockwise direction. As a result, the transfer sheet 11, the raw material roll 12, and the release sheet 14 are stacked on the installation surface 22a in this order, and are carried into the carrying-in port 20a as an integrated conveyance object 18. The transport object 18 is carried into the frame 20 through the carrying-in port 20a, and is carried between the driving roller 30 and the transport belt 50. In this case, the non-printing surface 12b of the raw material roll 12 faces the conveying surface 51, which is the conveying belt 50, via the release paper 14. The non-printing surface 11b of the transfer sheet 11 faces the driving roller 30, that is, the roller surface 32.

As shown in fig. 1, the driving roller 30 rotates, for example, in a clockwise direction. In this case, the conveying belt 50 is allowed to rotate integrally with the driving roller 30 via the rotation of the driven roller 40. That is, the driven roller 40 is rotated in the counterclockwise direction by the rotational force of the driving roller 30 transmitted via the conveying belt 50. With the rotation of the conveyor belt 50, the conveyed article 18 is conveyed in the clockwise direction between the roller surface 32 and the conveying surface 51. The conveyance 18 is pressed against the roller surface 32 via the conveyance surface 51, and heated via the roller surface 32. In this case, the sublimation of the sublimation dye N is promoted by the heating and the transfer of the sublimated sublimation dye N to the raw material roll 12 is promoted by the pressure generated by the heating and the pressurizing in the conveyance object 18. The sublimated sublimation dye N moves toward the raw material roll 12, and the dye component in the sublimation dye N is transferred to the raw material roll 12 and fixed. Transfer of the sublimation dye N to the raw material roll 12 and fixation are performed by allowing vaporized components of the sublimated sublimation dye N other than the dye components after transfer to permeate from the conveying surface 51 to the back surface 52 of the conveying belt 50.

The transfer product 18 after sublimation transfer is carried out from between the driving roller 30 and the conveyor belt 50 by the rotation of the driving roller 30. That is, the transfer paper 11 of the conveyance object 18 is separated from the roll surface 32. Thereafter, the conveyed article 18 is carried out of the frame 20 through the conveying surface 51 from the carrying-out port 20b, which is a portion corresponding to the driven roller 40d, and the release paper 14 is separated from the conveying surface 51. The transfer paper 11 is peeled from the transport 18 while the transfer paper 11 is wound in a roll shape by the transfer paper winding roller 23b assembled to the frame 20. The transfer sheet 11 is peeled off and conveyed to the release sheet winding roller 25b mounted on the frame 20. The release paper 14 is peeled off from the conveyance object 18 during the process of winding the release paper 14 in a roll shape by the release paper winding roller 25 b. The transfer sheet 11 and the transfer sheet 14 are peeled off, and the transfer material 18 is a sublimation-transferred raw material roll 12 to which the sublimation dye N is transferred. The sublimation-transferred raw material roll 12 is wound in a roll shape by a raw material roll winding roller 24b assembled to the frame 20. By continuously performing the above-described actions, sublimation transfer is continuously performed on the raw material roll 12.

< Function of correcting hunting >

As shown in fig. 1, a detection sensor 26 for detecting meandering of the conveyor belt 50 during rotation is incorporated in the frame 20. The detection sensor 26 is assembled at a position around the conveyor 50 in the frame 20. The detection sensor 26 detects the position of the end of the conveying belt 50 in the width direction. The detection result of the detection sensor 26 is sent to the controller 60 of the sublimation transfer device 10.

The controller 60 is disposed outside the housing 20, for example. The controller 60 is electrically connected to the detection sensor 26 so as to be able to receive a detection result of the detection sensor 26 via an unillustrated electric wire, for example. When the controller 60 receives the detection result of the detection sensor 26, the meandering direction of the conveyor belt 50 is determined based on the detection result. For example, the controller 60 determines the meandering direction based on the direction in which the position of the end in the width direction of the conveyor belt 50 is shifted from a predetermined reference position. The controller 60 controls the operation of the adjusting mechanism 27 for adjusting the tension or position of the tension spring 41 based on the determined meandering direction. The adjustment mechanism 27 is assembled to the frame 20 at a position around the tension spring 41. The controller 60 is electrically connected to the adjusting mechanism 27 so as to control the operation of the adjusting mechanism 27 via an electric wire, not shown, for example. The controller 60 executes a meandering correction process of displacing the first end of the driven roller 40c in the up-down direction by controlling the adjustment mechanism 27. For example, when the first end of the driven roller 40c is displaced upward, the meandering of the conveying belt 50 is corrected toward the second end of the driven roller 40 c. When the first end of the driven roller 40c is displaced downward, the meandering of the conveyor belt 50 is corrected toward the first end of the driven roller 40 c. That is, the sublimation transfer device 10 has a meandering correction function of correcting meandering of the conveyance belt 50 during rotation.

The controller 60 has a microcomputer 60a as a processing circuit. Various processes related to the operation of the sublimation transfer device 10 are functional portions realized by a CPU (central processing unit) of the microcomputer 60a executing a control program. The various processes include, for example, a meandering correction process, a process related to turning on/off of the power supply of the sublimation transfer device 10, a process related to the operation of the heater portion 31 of the drive roller 30, and a process related to driving of the drive source for rotating the drive roller 30. The microcomputer 60a includes a memory storing a control program. The Memory includes a computer-readable medium such as RAM (Random Access Memory: random access Memory) and ROM (Read Only Memory). The various processes are only examples, and at least a part of the processes may be implemented by a hardware circuit such as a logic circuit.

< Conveyer belt 50>

As shown in fig. 2 and 3, the conveyor belt 50 is an endless belt-like member having a predetermined thickness. The surface of the conveyor belt 50, that is, the conveying surface 51 and the back surface 52 are glossy smooth surfaces. This is because both surfaces 51, 52 are coated with a resin coating film 53 formed by a resin coating. The heat resistance of the conveyor belt 50 is ensured by the coating film 53, and the rigidity Rg and the transmittance Br of the conveyor belt 50 are adjusted to the optimum values. The rigidity Rg is an example of a first index that is an index of how easily the conveyor belt 50 deforms against a force acting on the conveyor belt 50 during rotation. The transmittance Br is an example of a second index that is an index of the degree to which vaporized components other than the dye components after transfer in the sublimated sublimation dye N permeate between the both surfaces 51 and 52 of the conveyor belt 50.

Specifically, as shown in fig. 4, the conveyor belt 50 is made of a fabric obtained by coating a fabric 56 with a coating film 53. Fabric 56 is formed by weaving warp yarns 54 and weft yarns 55. The fabric 56 is, for example, a canvas woven by plain weave woven so that the warp yarns 54 and the weft yarns 55 alternately cross one another. The warp yarn 54 and the weft yarn 55 are, for example, synthetic fibers such as aromatic polyamide, carbon fibers such as Carbon (Carbon), or Glass fibers such as long Glass fibers (Glass fibers). In this case, the fabric 56 has a characteristic that it is difficult to stretch in the direction in which the warp yarns 54 and the weft yarns 55 extend, respectively. In addition, the fabric 56 has a plurality of gaps 57 surrounded by two warp yarns 54 adjacent to each other and two weft yarns 55 adjacent to each other. The gap 57 is a portion penetrating the fabric 56. For example, the warp yarn 54 extends in the same direction as the conveyor belt 50, that is, the conveyor surface 51. That is, the warp yarn 54 extends in the same direction as the direction in which the transfer paper 11, the raw material roll 12, and the like are conveyed. In this case, the direction in which the weft yarn 55 extends coincides with the direction orthogonal to the direction in which the conveyor belt 50 extends, that is, the direction in which the conveying surface 51 extends. That is, the direction in which the weft yarn 55 extends coincides with the direction orthogonal to the direction in which the transfer paper 11, the raw material roll 12, and the like are conveyed.

The coating film 53 is formed by passing or immersing the entire periphery of the fabric 56 in a stock solution containing a fluororesin as a main component, and performing a well-known coating operation. The number of operations for forming the coating film 53 is defined as one operation or an operation of immersing the fabric 56 in the stock solution for the entire circumference, for example. The stock solution contains, for example, a fluororesin as a main component. A coating film 53 having heat resistance is formed on the fabric 56.

As shown in fig. 5, a coating film 53 that enhances rigidity is formed on the conveyor belt 50 so as to be hard to deform in the direction in which the warp yarns 54 and the weft yarns 55 extend, respectively. Warp yarn 54 and weft yarn 55 are themselves coated by coating film 53. On the other hand, in the conveyor 50 in a state where the coating film 53 is formed, a plurality of through holes 58 as portions where the coating film 53 does not exist are formed at portions corresponding to the plurality of gaps 57. That is, when the resin coating is performed, the composition of the stock solution and the number of operations are adjusted so that the gap 57 is not blocked even if the coating film 53 is formed on the conveyor belt 50. The penetration holes 58 are adjusted so as not to clog the gap 57 even when the conveying surface 51 applies pressure to the roll surface 32. That is, the penetration holes 58 are portions where the coating film 53 does not exist in a state where the conveying surface 51 applies pressure to the roll surface 32.

< Method for producing tape >

As shown in fig. 5, in the resin coating layer, the composition of the stock solution and the number of operations are adjusted, so that the value of the film thickness D, which is the thickness of the coating film 53 formed on the conveyor belt 50, can be increased or decreased.

For example, in the resin coating, if components or the like that easily form the coating film 53 are mixed in the stock solution, the value of the film thickness D can be increased when the number of operations is the same. That is, the coating film 53 can be thickened. In addition, in the resin coating, if the number of operations is reduced, the value of the film thickness D can be reduced when the components of the stock solution are the same. That is, the coating film 53 can be thinned.

< Relation between film thickness D and rigidity Rg regarding resin coating >

For example, as shown in fig. 6, the relationship between the film thickness D and the rigidity Rg of the conveyor belt 50 has a proportional relationship in the case of schematic representation. The larger the value of the film thickness D, the larger the value of the rigidity Rg. This is considered to be because the larger the value of the film thickness D is, the thicker the coating film 53 is, the stronger the bonding between the warp yarn 54 and the weft yarn 55 is. The following is shown in fig. 6: when the film thickness D is zero, the rigidity Rg of the conveyor 50 is set to a value corresponding to the rigidity inherent in the fabric 56 itself. Fig. 6 schematically shows only one example of the relationship between the film thickness D and the rigidity Rg, and may not necessarily change linearly but may change non-linearly. The relationship between the film thickness D and the rigidity Rg varies depending on the knitting method of the fabric 56, that is, the size or number of the gaps 57 formed, and also varies depending on the composition of the stock solution.

< Relation between film thickness D and transmittance Br of resin coating >

For example, as shown in fig. 7, the relationship between the film thickness D and the transmittance Br of the conveyor belt 50 has a proportional relationship between the film thickness D and the predetermined value dth when the film thickness D is schematically shown. The larger the value of the film thickness D, the smaller the value of the transmission amount Br. This is considered to be because the larger the value of the film thickness D is, the thicker the thickness of the coating film 53 is, and thus the smaller the gap 57 is. When the value of the film thickness D is equal to or greater than the predetermined value dth, the transmittance Br is zero. This is considered to be because the coating film 53 blocks the gap 57 as a result of the increased value of the film thickness D. That is, when the film thickness D is equal to or greater than the predetermined value dth, the vaporized components other than the dye components after transfer in the sublimated sublimation dye N cannot pass through the conveyor belt 50. The predetermined value dth is a value in a range obtained by experiment when the gap 57 is blocked by the coating film 53. The following is shown in fig. 7: when the film thickness D is zero, the transmittance Br of the conveyor belt 50 is a value corresponding to the transmittance inherent in the woven fabric 56 itself. Fig. 7 schematically shows only one example of the relationship between the film thickness D and the transmittance Br, and may not necessarily change linearly but may change non-linearly. The relationship between the film thickness D and the transmittance Br varies depending on the knitting method of the fabric 56, that is, the size or number of the gaps 57 formed, and also varies depending on the composition of the stock solution.

< Relation between rigidity Rg and transmittance Br regarding resin coating >

As shown in fig. 8, the relationship between the rigidity Rg and the transmittance Br continuously changes between the coordinates a and B according to the change in the value of the film thickness D. In fig. 8, at the coordinate a, the film thickness D is zero, that is, the film thickness D is the minimum value m. At the coordinates B, the film thickness D is a conceivable maximum value M. At the coordinate S, the film thickness D is a predetermined value dth. Between the coordinates a and S, a relationship is selected as a trade-off: the larger the value of the stiffness Rg, the smaller the value of the transmission capacity Br, i.e. the smaller the value of the stiffness Rg, the larger the value of the transmission capacity Br. Between the coordinates a and S, the film thickness D is adjusted to a value smaller than the predetermined value dth as a value corresponding to the coordinate C, for example. By adjusting the film thickness D in this way, the rigidity Rg and the transmittance Br can be adjusted. In the present embodiment, the coordinate C is adjusted to a coordinate closer to the coordinate a than the coordinate S so that the transmittance Br is emphasized among the rigidity Rg and the transmittance Br and a certain degree of rigidity Rg is ensured. The value of the rigidity Rg to a certain degree is a value adjusted from the viewpoint of reflecting the hunting correction function. That is, the film thickness D of the present embodiment is adjusted to a value close to zero more than the predetermined value dth.

< Action of the embodiment >

In the conveyor belt 50 of the present embodiment, heat resistance can be ensured by forming the coating film 53. Further, in the conveyor belt 50, by forming the coating film 53, the performance of suppressing deformation in the direction in which the warp yarns 54 and the weft yarns 55 extend can be improved. Further, in the conveyor belt 50, by having the plurality of transmission holes 58, the vaporized components other than the dye components after transfer in the sublimated sublimation dye N can be transmitted from the conveying surface 51 to the back surface 52.

< Effects of embodiments >

(1) In the conveyor belt 50 to which the present embodiment is applied, heat resistance can be ensured. Further, in the conveyor belt 50, deformation of the conveyor belt 50 due to a force acting on the conveyor belt 50 during rotation can be suppressed. In the conveyor belt 50, the vaporized components of the sublimated sublimation dye N other than the dye components after transfer can be transmitted from the conveying surface 51 to the back surface 52. Therefore, in the sublimation transfer device 10, the optimal conveyor belt 50 can be employed.

(2) In the conveyor 50 to which the present embodiment is applied, even in a state in which the conveying surface 51 applies pressure to the roller surface 32, the through holes 58 are not clogged. Accordingly, the transfer belt 50 can be appropriately pressed during the transfer of the sublimation dye N, and the vaporized components of the sublimated sublimation dye N other than the dye components after transfer can be allowed to pass through the transfer surface 51 to the back surface 52.

(3) For example, as shown in fig. 8, a resin coating can be applied to the conveyor belt 50 so as to obtain a film thickness D corresponding to a value of a coordinate C between a coordinate a and a coordinate S. In this case, the warp yarn 54 and the weft yarn 55 themselves are coated with the coating film 53, so that the performance of suppressing deformation of the conveyor belt 50 in the direction in which the warp yarn 54 and the weft yarn 55 extend, respectively, is improved. On the other hand, the gap 57 is not blocked by the coating film 53, and the transmission hole 58 can be formed in the conveyor 50. This can produce the conveyor belt 50 having ensured heat resistance. Further, it is possible to manufacture the conveyor belt 50 satisfying the desired requirement of suppressing deformation of the conveyor belt 50 against the force acting on the conveyor belt 50 during rotation. Further, it is possible to manufacture the conveyor belt 50 satisfying the desired requirement that the vaporized components other than the dye components after transfer in the sublimated sublimation dye N permeate from the conveying surface 51 to the back surface 52. Therefore, an optimal conveyor belt 50 can be employed in the sublimation transfer device 10.

(4) According to the present embodiment, the film thickness D can be adjusted so that a plurality of transmission holes 58 can be formed. This makes it possible to manufacture the conveyor belt 50 to which the property of transmitting the vaporized component other than the dye component after transfer from the transfer surface 51 to the back surface 52 is appropriately added in the sublimated sublimation dye N.

(5) For example, as shown in fig. 7, if the film thickness D is too large, the gap 57 is blocked by the coating film 53. In contrast, in the present embodiment, the film thickness D is adjusted to a value within a range smaller than the predetermined value dth. This is effective for the property of adding the vaporized component other than the dye component after transfer in the sublimated sublimation dye N to the conveyor belt 50 to permeate from the conveying surface 51 to the back surface 52.

(6) As described in the present embodiment, when the sublimation transfer device 10 has a meandering correction function, a certain level of performance is required as the performance of the rigidity Rg in order to correct meandering of the conveyor belt 50. In contrast, from the viewpoint of reflecting the meandering correction function, the film thickness D can be adjusted based on the rigidity Rg. Therefore, according to the present embodiment, it is possible to realize the function of ensuring meandering correction and to allow vaporized components other than the dye components after transfer in the sublimated sublimation dye N to permeate from the conveyance surface 51 to the back surface 52.

(7) In the present embodiment, when adjusting the film thickness D, the use environment such as the characteristics of the raw material roll 12 or the transfer target defined from the thickness, the type of sublimation dye N, the place where the sublimation transfer device 10 is used, and the like can be considered from the viewpoint of shifting the coordinate C between the coordinate a and the coordinate S. Therefore, the sublimation transfer device 10 can employ the optimal conveyor belt 50 according to the use environment.

< Other embodiments >

The above embodiment may be modified as follows. The following embodiments can be combined with each other to such an extent that technical contradiction does not occur.

The meandering correction function may correct meandering of the conveyor belt 50 during rotation, and the method of implementing the meandering correction function may be appropriately changed. The meandering correction function may detect the meandering direction based on, for example, the inclination of the conveying surface 51 of the conveyor belt 50 or the tension of the conveyor belt 50. In the meandering correction function, for example, the meandering correction may be performed by a mechanism that slides the driven roller 40 or the conveyor belt 50 in the width direction of the frame 20 instead of the adjustment mechanism 27.

In the sublimation transfer device 10, the meandering correction function may be omitted. In this case, regarding the rigidity Rg and the transmittance Br, for example, the film thickness D may be adjusted with importance attached to the transmittance Br.

The film thickness D may be adjusted to a value smaller than the value adjusted in the above embodiment as a value corresponding to the coordinate C between the coordinates a and S. In this case, the occurrence of a situation in which the transmission hole 58 cannot be secured can be appropriately suppressed in the conveyor 50.

If the characteristic that is an index of how easily the conveyor belt 50 deforms with respect to the force acting on the conveyor belt 50 during rotation is a certain characteristic related to the rigidity Rg, substitution with another characteristic can be considered. As such other characteristics, for example, flexibility showing the ease of deformation of the conveyor belt 50 against a force acting on the conveyor belt 50 during rotation can also be used. In this case, the relationship between the film thickness D and the flexibility shown in fig. 6 shows a tendency that the larger the film thickness D is, the smaller the flexibility value is.

If the characteristic that is an index of the extent to which the vaporized components other than the dye components after transfer in the sublimated sublimation dye N pass through the conveyor belt 50 is a characteristic related to the transmittance Br, substitution to other characteristics can be considered. As such other characteristics, for example, a shielding rate showing the degree to which the vaporized component other than the dye component after transfer in the sublimated sublimation dye N is shielded between the both surfaces 51 and 52 of the conveyor belt 50 may be used. In this case, the relationship between the film thickness D and the shielding rate shown in fig. 7 shows a tendency that the larger the value of the film thickness D is, the larger the value of the shielding rate is.

The knitting method of the fabric 56 may be changed as appropriate, for example, to a twill weave knitted so that the portion where the warp yarn 54 crosses the weft yarn 55 forms an oblique line, or a satin weave knitted so that either the warp yarn 54 or the weft yarn 55 is exposed more.

The warp yarn 54 and the weft yarn 55 may be modified as appropriate, for example, by synthetic fibers, carbon fibers, or chemical fibers other than glass fibers. The warp yarns 54 and the weft yarns 55 may be, for example, natural fibers. The warp yarn 54 and the weft yarn 55 may be made of different materials.

The direction in which the warp yarn 54 extends may intersect with the direction in which the conveyor belt 50 extends, that is, the direction in which the conveying surface 51 extends. That is, the direction in which the warp yarn 54 extends intersects with the direction in which the transfer paper 11, the raw material roll 12, and the like are conveyed. For example, the direction in which the warp yarn 54 extends may be the same as the direction perpendicular to the direction in which the conveyor belt 50 extends, that is, the direction in which the conveying surface 51 extends. In this case, the direction in which the weft yarn 55 extends coincides with the direction in which the conveyor belt 50 extends, that is, the direction in which the conveying surface 51 extends.

In the stock solution of the resin coating, if desired properties are obtained as heat resistance, rigidity Rg, and transmittance Br of the conveyor belt 50, other resins may be used as the main component instead of the fluororesin.

In the conveyor 50, there may be a through hole 58 blocked by the coating film 53 in a state where the conveying surface 51 applies pressure to the roll surface 32. In this case, the desired requirement of allowing the vaporized components of the sublimated sublimation dye N other than the dye component after transfer to pass through from the conveyance surface 51 to the back surface 52 may be satisfied by the unblocked transmission holes 58.

At least the portions of the surfaces 51 and 52 of the conveyor belt 50 overlapping the conveyed article 18 may be coated with a resin.

The driving roller 30 may include a plurality of driving rollers. For example, in the above embodiment, a plurality of driving rollers having diameters smaller than the diameter of the driving roller 30 may be arranged in a range where the driving roller 30 faces the conveyor belt 50.

The number of driven rollers 40 can be changed appropriately, and is changed to three or less, five or more, or the like. In addition, if the conveyor belt 50 is configured to apply pressure to the driving roller 30, the number of driven rollers 40 may be one.

Next, technical ideas that can be grasped from the above-described embodiments and modifications are additionally described below.

The method for producing a tape according to claim 5 or claim 6, wherein the coating film is formed by performing a process of passing or immersing the fabric tape in a stock solution containing a fluororesin as a main component, and the film thickness is adjusted by the composition of the stock solution and the number of times of the process.

(Supplementary note 2) the method for producing a tape according to any one of claims 5 to 7, wherein the film thickness is adjusted from the viewpoint of a meandering correction function capable of reflecting correction of meandering of the tape during rotation of the tape.

Claims

1. A sublimation transfer device is configured to transfer sublimation dye printed on transfer paper to a cloth, wherein the sublimation transfer device comprises:

at least one drive roller configured to contain a heat source for sublimating the sublimation dye;

At least one driven roller; and

A belt which is provided between the driving roller and the driven roller to allow the belt to rotate integrally with the driving roller through rotation of the driven roller,

The belt is a fabric formed by weaving two warp yarns adjacent to each other and two weft yarns adjacent to each other in such a manner that a plurality of gaps occur regularly as sites surrounded by the warp yarns and the weft yarns,

The belt has a conveying surface for conveying the transfer paper and the cloth in an overlapped state and facing the roller surface of the driving roller,

The driven roller is configured such that the conveying surface is capable of applying pressure to the roller surface,

A resin coating film for ensuring heat resistance is formed on the surface of the belt including the conveying surface,

The belt has a plurality of through-holes,

The transmission hole is a portion that penetrates the tape at a portion corresponding to the plurality of gaps and does not have the coating film.

2. The sublimation transfer device of claim 1 wherein,

The penetration hole is configured not to be blocked in a state where the conveying surface applies pressure to the roll surface.

3. The sublimation transfer device of claim 2 wherein,

The film thickness of the coating film is set so that the penetration hole is not blocked in a state where the conveying surface applies pressure to the roll surface.

4. A method for manufacturing a belt for use in a sublimation transfer device configured to transfer sublimation dye printed on transfer paper to a cloth, the sublimation dye sublimated by heat including a dye component to be transferred to the cloth and a vaporization component other than the dye component, the method comprising the steps of:

a step of forming a fabric-made belt by weaving two warp yarns adjacent to each other and two weft yarns adjacent to each other in such a manner that a plurality of gaps occur regularly as sites surrounded by the warp yarns and the weft yarns;

A step of forming a resin coating film for ensuring heat resistance on the surface of the belt; and

A step of adjusting the film thickness of the coating film based on the first index and the second index,

The first indicator indicates how easily the strap is deformed in relation to the force acting on the strap,

The second indicator indicates the extent to which the vaporized component has penetrated the band,

The film thickness is adjusted so that a plurality of transmission holes are formed as portions that penetrate the tape at portions corresponding to the plurality of gaps and where the coating film does not exist.

5. The method for producing a belt according to claim 4, wherein,

The first index has a characteristic that the larger the film thickness is, the larger the value is,

The second index has a characteristic that the larger the film thickness is, the smaller the value is.

6. The method for producing a belt according to claim 4 or claim 5, wherein,

The second index includes a characteristic that the vaporization component cannot pass through the belt when the film thickness is equal to or greater than a predetermined value,

The film thickness is adjusted to a value in a range smaller than the predetermined value.

7. The method for producing a belt according to claim 4, wherein,

The coating film is formed by performing a process of passing or immersing the fabric tape in a stock solution containing a fluororesin as a main component,

The film thickness is adjusted by the composition of the stock solution and the number of operations.

8. The method for producing a belt according to claim 4, wherein,

The film thickness is adjusted according to a meandering correction function capable of correcting meandering of the belt while reflecting the rotation of the belt.