JP2001199145A - Manufacturing device for stamping surface of - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing device for stamping surface of stamp, excellent in the response property of a heating means for controlling a glass tube temperature, shortening the rise-up time of a work, capable of controlling the glass tube temperature correctly and capable of forming a stamping surface, faithful to a pattern. SOLUTION: In the manufacturing device for a stamping surface of a stamp, in which a superposed body W of a copy sheet and a stamp sheet is transferred while pinching and pressing the same against the peripheral surface of a glass tube 20 for rotating the superposed body W to project the light of a xenon lamp 40, arranged in the glass tube, against the copy sheet, and thermal-transfer the pattern on the copy sheet onto the stamp sheet a heating roller 50, heated by the light of a heating means or a halogen lamp 51, is employed as the heating means for a heating/cooling means for controlling the glass tube at a predetermined temperature while the heating roller is abutted against the glass tube by pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for forming a stamp face on a stamp sheet using a porous resin having open cells.

[0002]

2. Description of the Related Art An ink impermeable portion is formed by closing open cells of a stamp sheet made of a porous resin having open cells that allow ink to pass therethrough, and a pattern of a stamp surface is formed by the remaining ink transmitting portions. Stamps that can be continuously stamped are known.

FIG. 3 shows an example of a conventional stamping surface manufacturing apparatus for a stamp. An endless belt 30 is in pressure contact with the outer peripheral surface of a glass tube 20, and the belt 30 rotates along with the rotation of the belt 30. The glass tube 20 rotates in the direction of the arrow due to the frictional force. And for convenience, as shown by the dotted line:
The polymer W in which the original sheet and the stamp sheet are superimposed is conveyed while being pressed against the outer surface of the glass tube 20 by the belt 30. Here, a pattern including a portion that transmits light and a portion that blocks light is formed on the document sheet, and the stamp sheet is formed of a porous resin having a large number of open cells that allow the transmission of ink.

A xenon flash lamp 40 is arranged in the glass tube 20. When the xenon flash lamp 40 emits flash light, the light transmitted through the glass tube 20 is applied to the document sheet. Then, based on the pattern of the manuscript sheet, light energy is converted into heat on the manuscript sheet or the stamp sheet to melt the surface of the stamp sheet, and the closed cells are closed to form an ink non-permeable portion. The remaining portion that is not irradiated with light energy is an ink transmitting portion in which the open cells are not closed, and is imprinted with ink passing through the ink transmitting portion on a stamp surface according to the pattern of the document. (For example, see JP-A-8-72376.
No.)

As described above, the light energy is converted into heat and the surface of the stamp sheet is melted based on the pattern of the original sheet. If the temperature of the glass tube 20 against which the polymer W is pressed is low, the temperature is transmitted to the stamp sheet. Since the heat to be taken is taken by the glass tube 20 having a large heat conductivity and heat capacity, the heat is not sufficiently transmitted to the stamp sheet having a small heat conductivity. Therefore, it becomes an ink transmitting portion, and it is impossible to form a stamped surface faithful to the pattern of the document sheet. However, conversely, if the temperature of the glass tube 20 is too high, the heat of the glass tube 20 is transmitted to the stamp sheet, the surface of the portion of the stamp sheet that is to become the ink permeable portion is also melted, and the open cells are closed, and the ink becomes non-ink. It becomes a transmissive part, and also in this case, it is impossible to form a stamped surface faithful to the pattern.

For this reason, a heating / cooling means for controlling the glass tube 20 to a predetermined temperature is required.
The cooling fan 60 is a cooling unit, and the heater 90 is a heating unit. Then, the cooling fan 60 and the heater 90 operate based on the signal of the temperature sensor 79. That is, first, the heater 90 is energized to raise the temperature of the glass tube 20 to a predetermined temperature, and then the stamp face manufacturing operation is started. However, when the temperature detected by the temperature sensor 79 exceeds the upper limit set temperature, the cooling fan 60 operates. When the detected temperature becomes equal to or lower than the lower limit set temperature, the heater 90 is operated again to heat the glass tube 20, thereby cooling the glass tube 20.
Is controlled within a predetermined temperature range. Such a stamp stamp manufacturing apparatus is disclosed in Japanese Patent Application Laid-Open No. 10-264 filed by the present applicant.
No. 490.

[0007]

The heater 90
Uses a so-called flexible heater in which a heating wire is embedded in a porous elastic resin plate, and heats the glass tube 20 by heat radiated from the heater 90. However, since the flexible heater is a kind of furnace body, its response is low, and the glass tube 20 reaches a predetermined temperature and the heater 9
Even if the power supply to 0 is cut off, the glass tube 20 is somewhat heated by the residual heat of the heater 90. If the glass tube 20 is used continuously for a long time, the temperature of the glass tube 20 keeps increasing gradually, and there is a problem that the cooling capacity cannot keep up. In addition, since the response of the heater 90 is low, it takes a long time, for example, about 20 minutes to elevate the temperature of the glass tube 20 to a predetermined temperature at the start of the stamp face manufacturing operation.

Therefore, the present invention provides a stamp stamping surface manufacturing method which has a good response of the heating means, shortens the rise time of the work, and can precisely control the temperature of the glass tube to form a stamping surface faithful to the pattern. It is intended to provide a device.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a glass rotating polymer which is obtained by laminating a pattern-formed original sheet and a stamp sheet made of a porous resin having open cells. In a stamping and stamping surface manufacturing apparatus that nips and conveys the peripheral surface of the tube with a belt, irradiates the original sheet with the light of a lamp disposed inside the glass tube, and thermally transfers the pattern of the original sheet to the stamp sheet, A heating roller heated by light from a halogen lamp is used as a heating means for controlling the temperature to a predetermined temperature, and this heating roller is pressed against a glass tube.

[0010]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 shows a specific example of the stamp face manufacturing apparatus of the present invention, in which a glass tube 20 is disposed in a casing 10. The glass tube 20 is, for example, a cylindrical body made of hard glass having a thickness of about 3 mm, and has an outer diameter of 120 mm. Endless belt 30
Are wound around the driving roller 31 and the driven rollers 32 and 33. A part of the belt 30 is pressed against the glass tube 20. When the motor 34 operates, the drive roller 31 rotates, and the belt 30 is driven in the direction of the arrow. The driven roller 33 is pulled in a direction of applying tension to the belt 30 by the elastic force of the tension adjusting spring 35.

Two pressing rollers 21 and 22 are in pressure contact with the glass tube 20 at a position facing the belt pressure contact portion 20a. That is, the glass tube 20 is rotatably held by the pressing rollers 21 and 22 and the belt 30, and when the belt 30 is driven and rotated, the glass tube 20 also rotates in the direction of the arrow due to the frictional force. If the glass tube 20 is rotated only by the frictional force of the belt 30, the rotational speed becomes uneven because the moment of inertia of the glass tube 20 is large, and this unevenness directly affects the processing performance of the stamp surface. It is preferable that one of the rollers 21 and 22 is driven by a motor so that the pressing roller applies a rotational force to the glass tube 20.

In the glass tube 20, a xenon lamp 40 is arranged in the axial direction. Xenon lamp 40
Is a long arc type flash lamp in which xenon gas is sealed inside the arc tube. The inner diameter of the arc tube is, for example, 10 mm, and the emission length is 210 mm. The light emission cycle is 1 Hz, and the light emission energy is about 300 J per light emission.

The xenon lamp 40 is covered with a reflecting mirror 41. The reflecting mirror 41 is formed by shaping a flat plate having a mirror surface such as bright aluminum with an opening of about 50 to 60 degrees. Then, when the xenon lamp 40 emits flash light, the light is emitted directly or reflected by the reflecting mirror 41 and directed toward the belt pressure contact portion 20 a of the glass tube 20.

In order to obtain a good stamp surface, a glass tube 20 must be used.
It is necessary to make the illuminance in the axial direction at the belt pressure contact portion 20a as uniform as possible. For this purpose, it is necessary to make the light distribution at both ends of the xenon lamp 40 larger than the central part. Therefore, as shown in FIG. 2, the central part of the reflecting mirror 41 in the axial direction is cut and the notch 41a is formed. Is formed, and the area of the reflection surface is reduced so that light energy is not excessively concentrated at the central portion.

A cooling fan 60 as cooling means for heating / cooling means for controlling the glass tube 20 to a predetermined temperature is arranged downstream of the belt pressure contact portion 20a of the glass tube 20, and a heating roller 50 as heating means includes a glass roller. The tube 20 is disposed on the upstream side of the belt pressure contact portion 20a. The cooling fan 60 is, for example, an axial fan, and operates when the detection temperature of the first temperature sensor 71 in contact with the glass tube 20 becomes higher than a set temperature of the upper limit of the temperature of the glass tube 20, for example, 50 ° C. The cooling air cools the glass tube 20, which has become high in the belt pressure contact portion 20a during the stamp face manufacturing operation, to a temperature not higher than the upper limit set temperature. Then, when the temperature of the glass tube 20 falls below the upper limit set temperature, the cooling fan 60 stops.

The heating roller 50 is made of, for example, black silicon rubber having a high heat-resistant temperature, is a cylindrical body having a small heat capacity, and is in contact with the glass tube 20. Therefore, when the glass tube 20 rotates, the heating roller 50 also rotates. A tube-shaped halogen lamp 51 is disposed at a position facing the heating roller 50 in the glass tube 20. The rated voltage and the rated power consumption of the halogen lamp 51 are, for example, 200 V, 3
00W. A gutter-shaped reflecting mirror 52 is arranged on the back of the halogen lamp 51, and a gutter-shaped reflecting mirror 53 is also arranged on the back of the heating roller 50.

The second temperature sensor 72 is in contact with the surface of the glass tube 20 on the upstream side of the heating roller 50, and the temperature detected by the second temperature sensor 72 is set to the lower limit of the temperature of the glass tube 20, for example, 47. When the temperature is lower than ℃, the halogen lamp 51 is turned on. Then, the light emitted from the halogen lamp 51 is transmitted directly through the glass tube 20 or reflected by the reflecting mirror 52, and is applied to the heating roller 50. Light that has not been applied to the heating roller 50 is also reflected by the reflecting mirror 53 and applied to the heating roller 50. Therefore, the surface of the heating roller 50 is efficiently heated by the light of the halogen lamp 51 and rises in temperature, and the heat heats the glass tube 20 which has become lower than the lower limit set temperature to be higher than the lower limit set temperature. I have. When the temperature of the glass tube 20 rises above the lower limit set temperature, the halogen lamp 51 is turned off. Note that the halogen lamp 51 does not necessarily need to be disposed in the glass tube 20, and it is only necessary that the heating roller 50 be efficiently heated by the light of the halogen lamp 51.

Then, the belt 30 is driven to rotate the glass tube 20, and the halogen lamp 51 is turned on to heat the glass tube 20 by the heating roller 50. At this time, since the responsiveness of the halogen lamp 51 is high, the surface of the heating roller 50 quickly rises in temperature, and thus the temperature of the glass tube 20 also rises quickly. And the temperature of the glass tube 20 is 4-5.
Since the temperature rises to the lower limit set temperature (for example, 47 ° C.) or more in about a minute, the standby time for rising can be greatly reduced. By the way, in the conventional example shown in FIG. 3, it took about 20 minutes for the glass tube 20 to rise to a temperature equal to or higher than the lower limit set temperature.

When the temperature of the glass tube 20 rises above the lower limit set temperature, the polymer W of the original sheet and the stamp sheet is heated.
Is inserted through the insertion opening 11 of the casing 10, and the belt 30
To be transported. When the polymer W moves to the belt pressing portion 20a of the glass tube 20, the xenon lamp 40 emits flash light. Thereby, as described above, a stamp surface is formed on the stamp sheet. Then, the polymer W having the stamp surface formed on the stamp sheet is taken out from the outlet 12 of the casing 10.

If the stamp face manufacturing operation is continuously performed, the temperature of the glass tube 20 gradually increases. However, when the temperature exceeds the upper limit set temperature, the cooling fan 60 is operated to cool the glass tube 20 as described above. Cooling. When the temperature of the glass tube 20 falls below the lower limit set temperature, the halogen lamp 51
Is turned on to heat the glass tube 20, and when the temperature becomes equal to or higher than the lower limit set temperature, the halogen lamp 51 is turned off. However, since the halogen lamp 51 has extremely high responsiveness, the surface of the heating roller 50 is simultaneously turned on. The temperature rises, and at the same time the light goes out, the temperature quickly drops. Therefore, the halogen lamp 5
1 is turned off, and the residual heat of the heating roller 50 causes the glass tube 20 to turn off.
Temperature does not gradually rise. That is, the temperature of the glass tube 20 can be very accurately controlled by the cooling fan 60 and the heating roller 50 as the heating / cooling means, and a stamped surface faithful to the pattern of the document sheet can be formed.

Since two temperature sensors, ie, a first temperature sensor 71 for the cooling fan 60 and a second temperature sensor 72 for the heating roller 50, are provided, the distance between the second temperature sensor 72 and the heating roller 50 is increased. Can be shortened and the time deviation of the temperature control can be improved, so that the cooling fan 6 can be controlled by one temperature sensor.
Control can be performed with a faster response than when the heating roller 50 is controlled to 0.

[0022]

As described above, according to the present invention, a belt is provided on the peripheral surface of a rotating glass tube by rotating a polymer in which a document sheet on which a pattern is formed and a stamp sheet made of a porous resin having open cells are superimposed. In a stamp printing surface manufacturing apparatus that irradiates a document sheet with light from a xenon lamp arranged inside the glass tube and thermally transfers the pattern of the document sheet to the stamp sheet, the glass tube is heated to a predetermined temperature. Using a heating roller heated by the light of a halogen lamp as the heating means of the heating and cooling means to control,
Since this heating roller is pressed against the glass tube, the responsiveness of the heating means is good, the rise time of the operation is short, and the temperature of the glass tube can be accurately controlled to form a stamped surface faithful to the pattern. It can be a stamp stamping surface manufacturing apparatus.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a perspective view of a reflecting mirror.

FIG. 3 is a sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Casing 20 Glass tube 30 Belt 40 Xenon lamp 50 Heating roller 51 Halogen lamp 60 Cooling fan 71 1st temperature sensor 72 2nd temperature sensor W Polymer of manuscript sheet and stamp sheet

Claims (1)

[Claims] 1. A polymer in which a document sheet on which a pattern is formed and a stamp sheet made of a porous resin having open cells are superimposed and conveyed while being pressed with a belt on the peripheral surface of a rotating glass tube. A stamp printing surface manufacturing apparatus that irradiates the light of a lamp disposed inside the original sheet to the original sheet and thermally transfers the pattern of the original sheet to the stamp sheet, comprising heating means for controlling the glass tube to a predetermined temperature,
An apparatus for manufacturing a stamped stamp, wherein the heating means is a heating roller heated by light from a halogen lamp, and the heating roller is pressed against the glass tube.