JPH0353975A - Transfer control method in heat transcriber - Google Patents

Abstract

PURPOSE:To perform transfer with good accuracy by arranging first and second detectors on the traveling path of a beltlike transfer film and by separating a transfer roller and a jig relatively from each other through detection of a detection mark by the second detector while stopping the feed of the beltlike transfer film through causing the first detector to detect the next detection mark. CONSTITUTION:A transfer roller 1 is normally heated to a temperature within the range of 180-230 deg.C to rotate in the feed direction of a film 4 and a molded item 17 comes in contact with the transfer roller 1 via the film 4 while a transfer foil 13 is transferred to the surface of the molded item. When the transfer foil 13 of a desired length part is transferred to the molded item 17, the detection mark 14 of the film 4 reaches a second detector 12, the mark 14 is detected by the detector 12, and an air cylinder 2 descends at once to separate the molded item 17 and film 4 from the transfer roller 1. In the meantime, the beltlike transfer film 4 travels and, when the next mark 14 to the mark 14 detected by the first detector 11 reaches the first detector 11, the feed of the beltlike transfer film 4 is stopped by detection through the detector 11.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a transfer control method for accurately thermally transferring foil in a transfer machine that thermally transfers aluminum foil or the like onto the surface of an article such as a resin molded product. It is.

[Conventional technology]

In order to thermally transfer foil onto the surface of a resin molded product, a strip-shaped transfer film is stretched between the transfer roll and a jig that supports the molded product so that it can pass through, and A thermal transfer machine configured to thermally transfer the transfer foil layered on the belt-shaped transfer film by pressing it onto the surface is generally used. In order to thermally transfer images sequentially and accurately onto the surface of the image, it is necessary to set the transfer start position and transfer time.

For this reason, conventionally, detection marks provided at regular intervals on the belt-shaped transfer film are detected by a detector such as a phototube, and at the time of detection, the transfer start end of the transfer foil of the belt-shaped transfer film is stopped directly below the transfer roll. Next, the transfer roll and the jig are moved relatively close to each other, and the surface of the molded product supported by the jig is pressed against the strip-shaped transfer film, while the strip-shaped transfer film is run, and the transfer foil is transferred by a timer. The transfer method uses heat transfer for a set amount of time.

[Problem to be solved by the invention]

However, according to such a thermal transfer control method, even if the transfer start time can be accurately set by the detector, the transfer time is set by the foil transfer length and the foil feeding speed, so the transfer time is set by the foil transfer length and the foil feeding speed. Even if a time error occurs, the length of the transferred foil will be inconsistent, and even if the time is set accurately, the tension applied to the strip-shaped transfer film and the degree of gourd will change due to expansion and contraction of the film. There was a problem in that the length of the foil transferred to the surface of the molded product varied slightly, making it impossible to perform accurate thermal transfer.

The present invention completely solves these problems, and allows transfer to a predetermined location on a predetermined article regardless of the expansion and contraction of the belt-shaped transfer film on which the transfer foil is provided, the tension applied to the film, and even the transfer speed. The present invention provides a transfer control method in a thermal transfer machine, which aims to transfer foil to a predetermined length with high precision.

[Means to solve the problem]

In order to achieve the above object, a transfer control method in a thermal transfer machine of the present invention is such that a belt-shaped transfer film having a constant width, in which transfer foils and detection marks are provided at regular intervals, is passed between a transfer roll and a jig. In a thermal transfer machine configured to press the transfer foil layered on the band-shaped transfer film onto the surface of a precept-shaped article supported by a jig, the transfer foil is thermally transferred. }-shaped transfer film is running, first and second detectors for detecting the detection mark are disposed, and the first
When the detection mark is detected by the detector in step 4, the transfer start end of the transfer foil of the band-shaped transfer film is stopped directly below the transfer roll, and then the transfer roll and jig are moved relatively close to each other and the jig is placed on the transfer roll. While pressing the supported surface of the shaped article against the belt-shaped transfer film L, the belt-shaped transfer film is run, and the transfer foil is thermally transferred onto the surface of the molded article until a second detector detects a detection mark. By detecting the detection mark by the second detector, the transfer roll and the jig are relatively separated, and the next detection mark is detected by the first detector, and the feeding of the belt-shaped transfer film is stopped. It is characterized by:

[For production]

The first and second detectors are arranged so as to be movable and adjustable along the length direction of the belt-shaped transfer film, and first, when the transfer start end of the transfer foil of the belt-shaped transfer film is located directly below the transfer roll, That is, at the start of transfer, the position is adjusted so that the first detector detects any detection mark provided on the belt-shaped transfer film, and then fixed at that position, while detecting any detection mark provided on the belt-shaped transfer film. A second detector is fixed at a position that is the same distance as the length of the foil to be transferred toward the foil feeding direction 111J of the cylindrical transfer film.

In this way, when the belt-shaped transfer film is fed after setting the positions of the first and second detectors, when the detection mark is detected by the first detector, the transfer foil of the belt-shaped transfer film is The transfer start end will stop directly below the transfer roll.

Next, when the transfer roll and the jig are moved relatively close to each other and the strip-shaped transfer film is run while pressing the surface of the molded product supported by the jig against the strip-shaped transfer film, six continuous pieces of foil are applied to the molded product. When the foil is thermally transferred and thermally transferred for a predetermined length, the detection mark reaches the second detector, and upon detection, the transfer roll and jig are relatively separated from each other, completing the transfer of the foil onto the molded product.

During this interval, the belt-shaped transfer film is also fed.
When the next mark from the mark detected by the first detector reaches the first detector, the conveyance of the belt-shaped transfer film is stopped, and the thermal transfer to the next molded product is carried out in the same manner as above. It is something to do.

[Embodiment] To explain an embodiment of the present invention with reference to the drawings, Fig. 1 shows an outline of a thermal transfer machine. A rotating jig (3) that is moved toward and away from the transfer roll (1) by (2) is provided, and a wound belt-shaped transfer film (4) is hung on both sides of the transfer roll (1). A feed-out rotation shaft (5) and a film take-up shaft (6) are arranged, and the film (4) fed out from the feed-out rotation shaft (5) is transferred between the transfer roll (1) and the jig (3).
) and is wound around the winding shaft (6) by passing it over presser rolls (7) and (8) arranged on both sides between the two.

Furthermore, a film feed rotation shaft (5) and a presser roll (7
) are provided with film guide rolls (9) θ0) at appropriate intervals in the vertical direction, and these rolls (9)
) 00) and one roll 00) and presser roll (7)
First and second photoelectric detectors (I+) 02) each consisting of a light emitter and a light receiver are arranged between them.

As shown in Figure 2, on one side of the belt-shaped transfer film (4), transfer foils 03) such as aluminum foil having a certain shape or pattern such as a rectangular shape, which is transferred by heating, are placed at regular intervals. The layers are intermittently deposited one after another, and detection marks Q4) 04)...
04) is layered.

Note that appropriate characters and the like are printed on the transfer foil 03).

As shown in FIG. 3, the first and second detectors (11) θ2) are connected to the machine frame 0! on which the transfer roll (1) and the like are arranged. i), the detection mark 0 is detected between the emitter tube and the receiver tube.
4) are disposed so as to be movable along the length of the belt-shaped transfer film (4) so as to sandwich the portion between them. The position adjustment mechanism of these detectors (II) 02) may be any means as long as it can be continuously adjusted in the length direction of the belt-shaped transfer film (4). A long groove 06) is provided in the base frame θ along the running direction of the film l, (4), and a detector (I1) 02) is provided in this long groove 06).
are arranged so that they can be slid and fixed.

The first detector (11) is installed at a position where the transfer start end of transfer 9 & 03) of the belt-shaped transfer film (4) is the transfer roll (1
), as shown in FIG. 2, the second detector 02) is placed and fixed at a location that matches the position of an arbitrary detection mark Q4), and the second detector 02) is placed at the following location: Between adjacent detection marks θ4)04), the film (
4), the foil 03) is adjusted and placed at a position that is equal to the length of the foil 03) to be transferred onto the precept θD.

This distance l is set to be equal to or smaller than the length of the transfer foil 03), and is, in short, the transfer length necessary for the preformed article 07).

After adjusting and fixing the positions of the first and second detectors (+1102) in this manner, thermal transfer of the foil is performed.

The belt-shaped transfer film (4) is wound into a roll and is attached to the delivery rotation shaft (5), and is delivered while applying appropriate hack tension to the film (4), and the film is wound up. The shaft (6) is driven by a motor to wind up the film (4), and a film feed roll is provided in front of the shaft (6), and the film (4) is rolled onto the winding shaft (6) side at a constant speed. It may also be configured to send.

Now, the detection mark 04) on the belt-shaped transfer film (4) is detected by the first detector (11) and the belt-shaped transfer film (4) is detected by the first detector (11).
) While the transfer start end of the transfer foil 03) is stopped directly below the transfer roll (1), press the activation switch to raise the air cylinder (2) and press the cylindrical shape fitted into the rotating jig (3). When the film (4) is pressed against the transfer roll (1) while pressing the molded article 07) such as a synthetic resin cassop against the starting end of the transfer strip 03) of the film (4), the pressing is controlled by a proximity switch (not shown). The belt-shaped transfer film (4) is fed by detecting the transfer film (4).

The transfer roll (1) is normally heated to a temperature within the range of 180 to 230°C and always rotates in the direction in which the film (4) is fed. The molded article θ'7l is rotated at the same circumferential speed while being in contact with the molded article θ'7l, and the transfer TJ (13) is transferred onto the surface thereof.

When the desired length of the transfer foil 03) is transferred to the molded product 0'7), the detection mark Oa provided on the film (4)
reaches the second detector θ of 10, the mark 04) is detected by the detector 02), the air cylinder (2) immediately descends, and the shaped article θ〃 and the film (4) are transferred to the transfer roll ( 1).

During this time, the belt-shaped transfer film (4) is running and the first
When the next mark 04) from the mark 04) detected by the detector (11) reaches the first detector (11), the strip-shaped transfer film (4) is detected by the detector (11). Stop feeding.

In this state, the transfer start end of the next transfer foil 03) will be located directly below the transfer roll (1), and the next molded product 07) will be mounted on the jig (3) and the same process will be repeated as described above. This method performs thermal transfer of foil.

Note that in the above embodiment, the jig (3) of the precept form 07) was moved with respect to the transfer roll (1), but the jig (3) was placed at a fixed position to perform the transfer. Roll (1)
The molded product 07) may be moved toward the jig (3), and the molded product 07) is of course not limited to a cylindrical shape, and can of course be thermally transferred to various shapes.

Furthermore, the arrangement position 1 1 of the first and second detectors (++) 02) is not limited to the positions indicated by −1 and 2, but may be any position as long as the belt-shaped transfer film (4) is running. The object of the present invention can be achieved even if these detectors (It) 02) are arranged one after the other.

〔Effect of the invention〕

As described above, according to the transfer control method for a thermal transfer machine of the present invention, a belt-shaped transfer film l having a constant width and provided with transfer foils and detection marks at regular intervals is stretched between a transfer roll and a jig. In a thermal transfer machine configured to thermally transfer the transfer foil layered on the strip-shaped transfer film by pressing it onto the surface of the pre-shaped product supported by the jig, while the strip-shaped transfer film is running, First and second detectors are provided to detect the detection mark, and when the detection mark is detected by the first detector, the transfer start end of the transfer foil of the belt-shaped transfer film L is directly below the transfer roll. and then
The transfer roll and the jig are moved relatively close to each other to press the surface of the molded article supported by the jig against the belt-shaped transfer film, and the belt-shaped transfer film 1 2 is run to transfer the transfer foil onto the surface of the molded article. Thermal transfer is performed until the second detector detects the detection mark, and when the second detector detects the detection mark, the transfer roll and the jig are relatively separated and the next detection mark is transferred to the first one. Since the conveyance of the belt-shaped transfer film is stopped by detecting it with a detector, the length of the foil to be thermally transferred onto the pre-shaped product is determined by the second detector located between adjacent detection marks and the detection on the feeding side. Since it corresponds to the distance from the service mark,
Unlike conventional methods, it is possible to efficiently perform thermal transfer processing with high precision, regardless of errors in transfer length due to transfer time settings, film feeding speed, and errors due to tension and temperature changes. The length of the foil to be transferred to the molded product can be set accurately by finely adjusting the setting position of the second detector, and all of the length can be set without causing any misalignment of the foil with respect to the molded product. It is possible to perform uniform thermal transfer on commemorative articles.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, and FIG. 1 is a schematic diagram of a thermal transfer machine 13, FIG. 2 is a front view showing the positional relationship between the belt-shaped transfer film L and a detector, and FIG. FIG. 4 is a plan view showing the position adjusting means of the container, and a simplified cross-sectional view showing the thermal transfer state. (1)... Transfer roll, (2)... Air cylinder, (3)... Jig, (4)... Band-shaped transfer film,
(l l) (12)...detector, 03)...transfer foil, OIi)...detection mark, θ force...precept form product.

Claims (1)

[Claims] (1) A belt-shaped transfer film having a constant width with transfer foil and detection marks provided at regular intervals is stretched between the transfer roll and the jig so that it can pass through the surface of the molded product supported by the jig. In a thermal transfer machine configured to thermally transfer the transfer foil layered on the belt-shaped transfer film by pressing the transfer foil layered on the belt-shaped transfer film, first and second detectors for detecting the detection mark are installed while the belt-shaped transfer film is running. When the detection mark is detected by the first detector, the transfer start end of the transfer foil of the belt-shaped transfer film is stopped directly below the transfer roll, and then the transfer roll and jig are moved relatively close to each other. The surface of the molded product supported by the jig is pressed against the belt-shaped transfer film while the belt-shaped transfer film is run to thermally transfer the transfer foil onto the surface of the molded product until a second detector detects a detection mark, By detecting the detection mark by the second detector, the transfer roll and the jig are relatively separated, and the next detection mark is detected by the first detector, and the feeding of the belt-shaped transfer film is stopped. A transfer control method in a thermal transfer machine characterized by: