JPS58138648A - Method and apparatus for controlling temperature of heating member in heat transfer machine - Google Patents

Abstract

PURPOSE:To prevent irregularity from being generated in a heat transfer treatment, by a method wherein a temperature change from the temperature before a heat transfer treatment to the temperature after the treatment is detected, and the fall of the temperature of a heating member due to the removal of heat by a material to be transferred is compensated by heating. CONSTITUTION:The temperature of the heating member 5 before the heat transfer treatment is detected by the first temperature sensor 7, and the temperature of the member 5 after the treatment is detected by the second temperature sensor 8. Signals from the sensors 7, 8 are fed into a temperature comparator, and a signal obtained by the comparator is fed to a sub-heater 10 provided at a stage upstream of a main heater 9 to control the heating temperature of the sub-heater 10, thereby compensating for the fall of the temperature of the heating member 5 due to the removal of heat through the heat transfer treatment. Accordingly, irregularities are prevented from being generated in the high-speed heat transfer treatment.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for making a heating member using temperature steel in a thermal transfer machine.

Thermal transfer can also be said to be a hot topic in printing technology, but this Kaede printing method◆ is a special printing method compared to the printing methods represented by so-called letterpress printing and planographic printing m-tatami, so it is an undeveloped part of the X machine. There is a lot of movement.

The heating member according to this invention! II! L! llll11
Method and its 1111s! Devices can also be considered to be one of these fields. For example, in a conventional thermal transfer machine, the heating member is made of temperature steel and its IIIi device. Since the W4 side of the rotating roll is sequentially heated to a predetermined humidity by arranging the rollers, effective transfer can be performed at a relatively slow thermal transfer speed. However, when performing Ik-perfect thermal transfer, heating with a heater placed in one place cannot sufficiently stop (Ili light) the heat taken away by the transferred object (Ili light). The drawback was that the temperature kept dropping to 1, making it impossible to perform accurate thermal transfer.

This invention was made in view of the above circumstances, and its purpose is to correct the low temperature of the heating member that performs thermal transfer continuously from lhl to heat and vine at a constant temperature. The height of the heating member made to sag! 1f for implementing the temperature-making method and secondly the temperature-making method described above! The objective is to provide a discussion on steel manufacturing.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

■ [About heating member temperature 111 method] 111
WJ is the temperature F! of the heating member according to the present invention. This figure shows the main parts of a temperature control device that employs the L control method. In the figure, X indicates an object to be transferred, and this object to be transferred
The transferred object At this time, the heating member 5 (a roll type is adopted in this embodiment) placed on the support stand 4 is pressed against the heating member 5 (a roll type is adopted in this embodiment), and the pattern ◆ attached to the bottom surface of the film 6 is thermally transferred [receiver] and taken out as a product by the next take-out conveyor 6. nru.

- Incidentally, in the above-mentioned transfer process, the transfer target X is subjected to warming treatment in the pre-treatment state or during the transfer process on the feed conveyor 1, and is sent to the transfer 112. Since it is a low-temperature process, the heat 11 of the heating member 5 is absorbed by the 14-year-old object to be transferred which undergoes the thermal transfer process.

Therefore, the temperature of the transfer surface of the heating member 5 which has completed the thermal transfer process of a predetermined picture pattern, etc. on the transferred object 1 will be lower than the temperature before the transfer process. If the thermal transfer process is slow, the temperature of the heating member 5 decreases WJRk! 1g1 for heat transfer by heating with a heater (installed only in one place in conventional equipment)
I wonder if it can be restored, the next Mk4 at high speed
If it is necessary to perform Shasho Hani, the temperature will decrease [
There is no way to restore it properly. As a result, the transfer humidity becomes uneven, causing trouble in the thermal transfer process of am.

Therefore, in this invention, by considering the above ◆mt,
The temperature of the thermal transfer process flifIJ of the s material 5 is measured by the first temperature sensor? Detected at -7, 11F after thermal transfer processing! tft at the second temperature sensor 8, and at the same time, the first temperature
The signal detected by the temperature sensor 7.8 is given to the temperature comparator, and the temperature comparator gives the signal to the sub-heater 10 installed at the # mark of the main heater 9 in FIG. Since the heating temperature is adjusted to compensate for the drop in temperature taken away by the heating member 5 during the thermal transfer process, the temperature constant processing (heating) of the heating member 5 by the main heater 9 is extremely low. It can be carried out quickly and enables high thermal translocation.

(2) [Temperature of Heating Member - Regarding Temperature Control] The heating member temperature St method described in [1] can be carried out by the temperature control device shown in FIGS. 1 and 2.

First, the entire heating member 5 has a
As shown in FIG. 1, the heating member 5 forming the center of the transfer section 2 is a roll-type heating member.
or placed. The sub-heater 10 is attached to one side of the main heater 9, that is, at a position where the portion of the added TIM% member 5 that comes into contact with the transfer target X arrives before the main heater 9. ml and a second humidity sensor 7.8 are disposed on the outer periphery of the heating member 5 in addition to the main heater 9 and the sub-heater 10. By the way, as shown in the figure, the first and second temperature sensors 7.8 are centered on the portion of the heating member 5 that contacts the transferred object X, and the first temperature sensor 7. -7 is on the right, and the second temperature sensor 8 is on the left.

FIG. 2 shows the main heater 9 for the heating member 5,
The specific configuration and heating method of the sub-heater 10, the first temperature sensor 7, and the second temperature sensor 8 are shown. As shown in the figure, the sub-heater 10 has a heater element IQ.
a...wIr, so that the outer periphery of the heating member 5 can be heated finely by dividing it into small sections.

On the other hand, the temperature sensor 8 of lh2 which gives a predetermined signal 111m1 to the sub-heater 10 is also used as shown in the figure for the enemy's seven elements 8a, . . .
- The structure is such that the outer circumferential temperature of the heating member 5 is "finely" detected and a predetermined signal is given to the temperature comparison 11 provided at the upper part of the figure. Furthermore, the main heater 9 and the m degree sensor 7 for Ml are designed to be able to perform average heating or a humidity sensor, rather than being a one-type sensor for -<m part heating or #kIs sensor. Incidentally, the sensor element 7a . . .
The output port of M! is connected to the humidity comparator 11 connected multiple times. It continues.

By the way, the support stand 4 for transferring the transferred object X shown in 161(2) is of an auto-lift type or used 2rL, and it is raised during transfer and conveyed.I! The transfer material X is pressed against the heating member 5. In addition, in the above embodiment, a four-ring type was explained as the heating material 5, but for example, it is a flat plate member or a fan-shaped plate member and is equipped to slide or rotate at a flat angle. However, it is not limited to the four-ru type Kashima Ikuzai material 5.

The action will be explained below.

First, the transferred object X, which has been sent onto the support stand 4 by the feed conveyor H, is brought into pressure contact with the heating member 5 rotating above as the support stand 4 rises. Due to this pressure contact, the image printed or vapor-deposited on the lower surface of the film 6 interposed between the heating member 5 and the transferred object X in a sun-like manner is thermally transferred to the surface of the object to be transferred. The film 6 or heating member 5 is moved and rolled onto a kick-out conveyor 6 and taken out as a product. By the way, the transferred object X to be subjected to the thermal transfer process is sent at a temperature lower than the heating temperature of the heating member 5, and is sent to the thermal transfer process! l! ! ,
! .

Since it receives heat from the heating member 5, a predetermined amount of heat is taken away from the heating member 5. Therefore, the direction of the transfer material 5 to the transferred object X after the above-mentioned thermal transfer process is considered to be correspondingly lower. And this temperature [the descending part is the wet layer temperature of $12? -8 is detected by n1 and given to temperature comparison 41!11 as n1 folding number. The temperature ratio *l1ll has the first
The detection signal before the thermal transfer process detected by the temperature sensor t-7 has already been given, and this detection signal is immediately compared with the detection signal from the second temperature sensor 8 n1.
The temperature drop n taken away from the transferred object X4C by the thermal transfer processing facility is calculated and given as a correction temperature command signal to the sub-heater 10. The above corrected temperature command signal is
The second temperature sensor 80 detecting the temperature drop portion of the heating member 5 is applied only to the heater elements 10m corresponding to the scissor sensor elements 8a.

Therefore, upon receiving the corrected temperature command signal, the scissor heater element IQa immediately adjusts the temperature drop to an appropriate temperature and starts heating the temperature drop portion of the heating member 5. The operation of rt is repeated and continuous l& transfer is performed.

Note that the preheater 12 is placed above the intermediate feed conveyor 1.
By applying a predetermined amount of heat to the transfer target X before the thermal transfer process, it is also possible to lower the low temperature rate during the thermal transfer process.

As described in detail above, the present invention uses a temperature sensor to detect the temperature change before and after the thermal transfer process of the heat transfer member, and also sends the detection signal to the sub-heater disposed on the arm of the main heater so that the transferred object can be heated. Since the temperature drop of the heating member is corrected by heating to return it to the excessive temperature, even if the thermal transfer process is performed at a high speed, processing unevenness does not occur and a very beautiful copy can be obtained. Also, because IIIt& adopts a simple method, it is easy to manufacture and has virtually no failures, so it has excellent industrial effects.

[Brief explanation of the drawing]

1st v! J is a front view showing one embodiment of the present invention, and FIG. 2 is an enlarged view of the main part of the same figure.

Claims (1)

[Scope of Claims] 11IIA &: In a thermal transfer machine that thermally transfers the above-mentioned line pattern, etc. onto the surface of an object to be transferred by abutting a heating member for thermal transfer on a film printed or printed with a predetermined picture III machine, etc. , the temperature of the above-mentioned #11 member before and after thermal transfer
IR conversion is detected, and the humidity change resulting from this detection is corrected for the heating member before entering the next thermal transfer step, so that the transfer humidity of the heating member during thermal transfer is kept constant. A method for manufacturing a heating member using humidity steel in a thermal transfer m. ■) In a thermal transfer machine that heat-absorbingly transfers the above-mentioned picture pattern etc. to the surface of the transferred object by contacting the -w of the film which has been printed or vaporized with a predetermined picture pattern etc., The plane of the main heater that rotates a predetermined heating is provided with a temperature sensor that detects the temperature f of the heating member that has completed thermal transfer, and is activated in response to the signal vrt from the temperature sensor, and the temperature sensor is activated to provide the heating member with a predetermined temperature. Thermal transfer is characterized by the provision of a correction heater for heating, and the heating member is placed on the humidity side. −