JPS6227671B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a thermal transfer method and apparatus for stamping a foil-covered film with a transfer roll onto a transfer material having a horizontal portion, a vertical portion, or various inclined portions on the transfer surface. It is related to.

Conventionally, when foil stamping an object with a sloped transfer surface, the object must be mounted using a special jig so that the transfer surface is horizontal to ensure proper contact with the transfer roll. However, if there are various slopes or vertical parts on the transfer surface of the same transfer object, it is necessary to attach the transfer object to a different jig depending on the transfer, which adds to the troublesome work. In addition, there are problems in that the work efficiency is poor, and when the transfer surface is an arcuate portion, transfer is almost impossible.

The present invention was completed with the aim of providing a thermal transfer method and an apparatus therefor that solve the above-mentioned problems.Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

Reference numeral 1 denotes a reciprocating table provided on a base 2, and the reciprocating table 1 is connected to a piston rod of a cylinder 3 mounted on the base 2, so that it can freely reciprocate on the base 2 in the left and right direction. Reference numeral 4 denotes a jig stand for placing an object to be transferred, which is mounted on the carriage 1 and can be tilted freely in the direction of movement of the carriage 1, and the jig stand 4 is as shown in FIGS. 3 and 4. , a slide plate 7 with a rack 6 that is connected to a piston rod 5' of a cylinder 5 fixed on the carriage 1 and moves back and forth, and a carriage 1 that pivotally supports a pinion 8 that meshes with the rack 6 are erected. Bearing plates 9, 9 and a driven pinion 10 which is supported by each bearing plate 9 and meshes with the pinion 8.
and arc-shaped gears 12, 12 fixed to each side plate 4' that mesh with gears 11, 11 provided at the shaft end of the driven pinion 10, and a jig stand 4.
is tilted by the operation of the cylinder 5 via a rack 6, a pinion 8, a driven pinion 10, a gear 11 coaxial therewith, and an arcuate gear 12. Reference numeral 13 denotes a lifting device for lifting and lowering the transfer roll, which lifts and lowers the head 17 attached to the base 2 via a column 14 and mounted on a guide rail 16 via a motor 15; Two transfer rolls 18, 18 are arranged alternately on the lower surface via a transfer roll tilting device, and the transfer rolls 18, 1 whose surfaces are made of silicone resin.
8 can itself be moved up and down slightly by cylinders 19, 19 operated by a copying servo valve 20 in contact with a copying gauge 79, which will be described later, and can be oscillated back and forth by a transfer roll tilting device 22. This is a vertical position adjustment device that moves the copying servo valve 20 up and down. Further, as shown in FIGS. 5 and 6, the transfer roll tilting device 22 meshes with two sector gears 24 arranged in parallel on the upper end surface of the holding frame 23 of the transfer roll 18. Rack 25 moved forward and backward by cylinder 29
27 is a guide groove portion for holding the moving piece 26 on the head 17 so as to be movable forward and backward, and 30 is a holding frame for swingably holding the holding frame 23 on the head 17. 23 is an arc-shaped engagement protrusion, 31 is an engagement groove provided in the head 17 and engages with the engagement protrusion 30;
33 is a stopper for the moving piece 26, and 33 is a transfer roll 18.
34 is a chain wheel with a roller clutch that connects the transfer roll 18 with a chain wheel rotated by a motor (not shown); 35 is a temperature measurement sensor that measures the temperature of the transfer roll 18; 36 is a head 17;
The foil-covered film roll device 36 is attached to a bracket 37 stretched from above and sends out the foil-covered film to one transfer roll 18 side.The foil-covered film roll device 36 has a tension control device that applies a constant tension to the foil-covered film. It is provided. 38
is a guide roll device provided between one transfer roll 18 and a foiled film roll device 36, and this guide roll device 38 has a frame plate 39 fixed to a bracket 37, as shown in FIGS. 7 and 8. A cylinder 40 attached to this, and a push plate 4 attached to a piston rod 41 of the cylinder 40.
2, a cylinder 44 whose base end is pivotally supported with a pin 43 on one end of the lower surface of the press plate 42, a frame member 47 connected to a piston rod 45 of the cylinder 44 with a hinge pin 46; A connecting member 49 is provided vertically from the other end of the lower surface of the push plate 42 and pivotally holds the frame member 47 with a hinge pin 48.
, a pair of bearing plates 52 that are pivotally supported at the lower end portion of the frame member 47 with pivot pins 51, and each of the bearing plates 5
2, and a tension coil spring 54 attached to the other end of the bearing plate 52 and the frame member 47, which can move up and down and tilt. When the cylinder 44 is actuated to extend the piston rod 45, the frame member 47 rotates and tilts as shown by the chain line in FIG. The roll 53 is also tilted, so that the foil-covered film sent from the foil-covered film roll device 36 is tilted and can be sent to the transfer roll 18 side. Reference numeral 50 denotes an intermediate guide roll that is pivotally supported at the lower part of the frame member 47. Further, the tension coil spring 54 is used to press the foil-covered film against the object to be transferred placed on the jig table 4 with a constant pressure. Reference numeral 55 denotes an intermediate roll that is pivotally supported by a support member 56 erected on the carriage 1 and guides the foil-coated film that has passed through the guide roll 53, and 57 is attached to the carriage 1 and that has passed through the intermediate roll 56. This is a take-up roll device for winding a foil-covered film, and the take-up roll device 57 is connected to a bracket 58 mounted on the carriage 1.
It consists of a guide roll 59 that is pivotally supported by the winding roller 59 and a take-up roll 60 equipped with a torque motor. Reference numeral 36' denotes a foil-covered film roll device arranged alternately in parallel with the foil-covered film roll device 36 in the head 17, and the foil-covered film roll device 36' has a similar mechanism to the foil-covered film roll device 36. Reference numeral 38' denotes a guide roll device provided between the other transfer roll 18 and the foiled film roll device 36', and the guide roll device 38' has the same mechanism as the guide roll 38. 5
Reference numeral 7' denotes a take-up roll device similar to the take-up roll device 57 which is mounted on the carriage 1 and winds up the foil-covered film. Reference numeral 61 denotes a transfer roll device that is attached to a base 62 provided on the base 2 at the rear side of the jig table 4 and is capable of stamping a desired side surface of the transferred object with foil. As shown in FIG. 9, a rotating plate 65 is pivoted with a pin 64 to a substrate 63 fixed on the base 62.
Then, one end is pinned to a slidable sliding body 69 connected to the tip of a piston rod 67 of a cylinder 66 attached to the rotating plate 65, and a mounting plate 70 fixed to a face plate portion 68 of the sliding body 69. A holding frame 73 which is pivotally supported by a holding frame 71 and connected and held by a spring 72 interposed at the other end, and a transfer roll 74 rotatably supported by the holding frame 73. The transfer roll 74 is movable in a direction perpendicular to the moving direction of the carriage 1.
Reference numeral 75 denotes a guide roll for the foil-covered film to be thermally transferred, and 77 denotes a clasp with notches 76 fixed to the rotary plate 65 in appropriate numbers in order to maintain the rotary plate 65 at a predetermined angle with respect to the substrate 63. , 78 are screwed stop handles for fixing the rotating plate 65. 79 is a copying gauge provided directly below the copying servo valve 20, and the copying servo valve 20 that moves along the copying gauge 79 controls the operation of the cylinder 19 to set the amount of advance of the transfer roll 18.

With this structure, the object to be transferred made of synthetic resin that needs to be transferred is attached to the slanted side edge of the jig table 4 as shown in FIG. 10, and the head lifting device 13 is installed. After lowering the head 17 and bringing the copying servo valve 20 into contact with the copying gauge 79, the required portion A of the inclined upper surface of the transferred object B is
The transfer roll tilting device 22 and the guide roll device 38, which are program-controlled to correspond to
When the transfer roll 18 is moved forward by the operation of the cylinder 3, the transfer roll 18 is moved to a predetermined portion A on the upper surface of the foil-covered film that is being sent from the foil-covered film roll device 36, via the guide roll device 38, to the take-up roll device 57. By pressing under pressure, the foil portion of the foil-covered film is transferred to the required portion A of the upper surface by hot pressing. When the transfer to the required portion A on the upper surface is performed by advancing the jig stand 4 and the transfer roll 18 is positioned directly above the corner B at one end of the object to be transferred, the cylinder 5 is actuated to move the jig stand 4 forward. 4 is tilted by a predetermined angle to transfer part of the corner B, and then to transfer to the required side part C. After that, the jig table 4 is further advanced and the transfer roll tilting device 22 and The guide roll device 38' is operated to tilt the other transfer roll 18 and the guide roll 53, and the foil-covered film being fed from the foil-covered film roll device 36' to the take-up roll device 57' covers the upper surface of the other side as required. All you have to do is transfer part A', then actuate the cylinder 5 to transfer corner part B' at one end, and then transfer the required side part C'. Part A, A', one end corner part B, B', side surface required part C,
When the transfer of C' is completed, the jig stand 4 is moved back in the opposite direction to position the transfer roll 74 of the transfer roll device 61 at a predetermined angle, and the cylinder 66 is operated to transfer the transfer roll 74 of the transfer roll device 61. roll 7
4 is moved to transfer the foil-covered film to the other side surface required portion D following the side surface required portions C and C', and the transfer to the transferred object A is completed. Even if the portion D has a curved shape as shown in FIG.
The holding frame 73 is pivotally supported at one end with a pin 71 and a spring 72 is interposed at the other end, so the transfer roll 74 follows the curved shape of the required side surface D. The foil-covered film is pressed under a predetermined pressure. Thereafter, it is sufficient to remove the transferred product from the jig table 4, place the next new transferred object on the jig table 4, and repeat the same operation as described above. In addition, the guide roll device 3
8 and 38' are provided so that the progress of the foiled film sent to the transfer rolls 18 and 18 arranged alternately in two rows is made to follow the tilting angle of each transfer roll 18. It is possible to eliminate wrinkles caused by twisting of the foil portion during transfer.

As is clear from the above description, the present invention is based on a transfer roll that is capable of tilting back and forth while descending from above, by placing an object to be transferred on a jig table and moving it horizontally, attaching a foil-covered film to a required part of its upper surface. After applying foil to the upper surface of the object to be transferred, the jig table is tilted in the direction of movement while continuing to move horizontally, and the transfer roll is applied from one end corner of the object to a required part of the side surface. Since it uses foil attachment, it is possible to transfer the foiled film to two-dimensional or three-dimensional objects, and it is now possible to transfer onto sloped, vertical, and arcuate areas, which were traditionally difficult to transfer. In addition, in the second invention, a jig stand that can be tilted in the direction of movement is provided on a horizontally movable carriage, and the transfer roll and foil-covered film can be moved back and forth. Since a guide roll device and a take-up roll device are installed, when the foil-covered film is transferred to the transferred object, the transfer roll can freely change the tilt angle by following the inclination of the main part for transfer, always with a constant pressing force. In order to apply foil to the transfer area while
The transferred product has an extremely beautiful transfer surface and is free from wrinkles and other defects, and the process can be performed continuously. Further, in the third invention, two transfer rolls of the above invention are arranged in parallel in two rows alternately, and two guide roll devices and two take-up roll devices for the transfer rolls are also provided. The transfer to the upper surface required portions of both sides of the object, and the subsequent one end corner portion and side surface required portions can be performed continuously from one side portion to the other side portion, and there is no wastage of time.
In addition to the above-mentioned invention, the invention includes a transfer roll device having a transfer roll that can move in a direction perpendicular to the direction of movement of the carriage, so that it is possible to transfer to a desired portion of the side surface of the object to be transferred.

Therefore, the present invention is suitable for applying foil to the transfer target part when transferring a transfer target having a complicated shape, such as an automobile tail lamp part or a radiator grille, which has upper surface edges with different slopes and many folded parts. It is not only economically advantageous, but also more difficult to transfer than before, as it can be performed accurately, the work can be done continuously, and the various jigs used in the past are not required. The present invention provides an extremely significant contribution to the industry as a thermal transfer method and apparatus capable of continuously and reliably performing transfer onto inclined portions, vertical portions, and arcuate portions in one step.

[Brief explanation of the drawing]

The drawings show an embodiment of the apparatus according to the present invention, and FIG. 1 is a partially cutaway front view, FIG. 2 is a side view, FIG. 3 is a partially cutaway front view of the jig table, and FIG. 4 is a partially cutaway front view. 5 is a partially cutaway side view of the transfer roll tilting device, FIG. 6 is a partially cutaway front view of the guide roll device, and FIG. 7 is a partially cutaway front view of the guide roll device. 9 is a partially cutaway side view of the transfer roll device, and FIG. 10 is a partially cutaway perspective view of the transfer object. 1: Carriage table, 2: Base, 4: Jig table, 18:
Transfer roll, 36, 36': foiled film roll device, 38, 38': guide roll device, 57,
57': Take-up roll device, 61: Transfer roll device, 74: Transfer roll.

Claims (1)

[Scope of Claims] 1. The object to be transferred is placed on a jig stand, moved horizontally, and a foil-covered film is attached to the required part of the upper surface, and the object is transferred by using a transfer roll that can swing back and forth while descending from above. After applying foil to the upper surface of the object, the jig table is tilted in the direction of travel while continuing to move horizontally, and the transfer roller is used to apply foil from one end corner of the object to a required portion of the side surface. Thermal transfer method. 2 Horizontally movable carriage 1 installed on base 2
A jig table 4 is provided above the jig table 4 so as to be tiltable in the direction of movement of the carriage 1, and a transfer roll 18 is provided above the jig table 4, which can swing back and forth and is movable up and down. and foil film roll device 3
6. A thermal transfer apparatus characterized in that a guide roll device 38 for the foil-covered film is provided between 6 and a take-up roll device 57 for winding the foil-covered film on the carriage 1. 3 Horizontally movable carriage 1 installed on base 2
A jig table 4 is provided on the top so as to be tiltable in the direction of movement of the carriage 1, and above the jig table 4 there are two transfer rolls 18, 18 which can swing back and forth and are movable up and down.
The transfer rolls 1 are arranged alternately in rows, and
8, 18 and foil film roll device 36, 3
Each guide roll device 3 of the foiled film between 6'
8 and 38', and each winding roll device 5 for winding the foil-covered film is provided on the carriage 1.
7, 57' is provided. 4 Horizontally movable carriage 1 installed on base 2
A jig table 4 is provided above the jig table 4 so as to be tiltable in the direction of movement of the carriage 1, and a transfer roll 18 is provided above the jig table 4, which can swing back and forth and is movable up and down. and foil film roll device 3
A guide roll device 38 for the foil-covered film is provided between 6 and a take-up roll device 57 for winding the foil-covered film is provided on the carriage 1. is shuttle 1
A thermal transfer device characterized in that a transfer roll device 61 is provided with a transfer roll 74 that can move in a direction perpendicular to the direction of movement.