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WO2011069350A1 - 烫金辊 - Google Patents

烫金辊 Download PDF

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Publication number
WO2011069350A1
WO2011069350A1 PCT/CN2010/071031 CN2010071031W WO2011069350A1 WO 2011069350 A1 WO2011069350 A1 WO 2011069350A1 CN 2010071031 W CN2010071031 W CN 2010071031W WO 2011069350 A1 WO2011069350 A1 WO 2011069350A1
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WO
WIPO (PCT)
Prior art keywords
electromagnetic induction
induction heater
circular
roll
roller
Prior art date
Application number
PCT/CN2010/071031
Other languages
English (en)
French (fr)
Inventor
吴东杰
Original Assignee
Wu Dongjie
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wu Dongjie filed Critical Wu Dongjie
Publication of WO2011069350A1 publication Critical patent/WO2011069350A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41G—APPARATUS FOR BRONZE PRINTING, LINE PRINTING, OR FOR BORDERING OR EDGING SHEETS OR LIKE ARTICLES; AUXILIARY FOR PERFORATING IN CONJUNCTION WITH PRINTING
    • B41G1/00—Apparatus for bronze printing or for like operations
    • B41G1/04—Apparatus for bronze printing or for like operations cylinder type

Definitions

  • the present invention relates to an improved bronzing roll, particularly a bronzing roll for use on a round press bronzing machine.
  • blanching In the printing process, bronzing is common.
  • the most commonly used blanching can be divided into flat hot and round hot.
  • the common heating methods of blanching are electric heating and oil heating. Electric heating is to energize the resistance wire in the heating plate to heat up and stabilize the temperature with a thermostat.
  • the structure is simple and low in cost, and is widely used for flat ironing.
  • the hot stamping roller used in the existing round stamping and stamping machine comprises a circular roller, an oil heat roller disposed in the circular roller, and a plurality of hot stamping templates disposed on the surface of the circular roller, the oil
  • the hot roll is in transitional engagement with the circular roll, which is typically heated in an oil-heated manner.
  • the so-called oil heat is actually electric heating. It is placed in the fuel tank.
  • the temperature of the oil is stabilized by the temperature controller.
  • the heated oil is sent to the oil heating roller through the oil pipe through the oil pipe, flowing through the inside of the oil heating roller. Flow out and flow back to the tank through the oil pipe.
  • the oil heat roller In the hot oil one by one, the oil heat roller is heated by the hot oil, and the oil heat roller further heats the round roller and the bronzing template; also the hot oil in the oil heat roller is from one end, and also from The oil heat roller is such that the hot oil enters the oil heat roller from the oil inlet port, and then folds back and flows out from the oil outlet at the same end, and flows back to the oil tank through the oil pipe.
  • the system has a complicated structure, high process requirements, high cost, large fuel tank volume, and high temperature environment in the workshop, which causes high temperature environment and other unfavorable factors that restrict its wide application.
  • the object of the present invention is to overcome the above drawbacks and to provide an improved bronzing roll which has a simple structure, a high heating speed and a uniform temperature of the bronzing roll.
  • Another object of the present invention is to provide a bronzing roll that is easily removable.
  • the invention can be achieved by the following technical solution: designing an improved bronzing roll comprising a circular roll, a drive mechanism for driving the rotation of the circular roll, and a plurality of stamping templates embedded on the surface of the circular roll
  • the circular roller is made of an alloy of a magnetic conductive metal, an oxide of a magnetic conductive metal or a magnetic conductive metal, and an electromagnetic induction heater is disposed outside or inside the circular roller, and the electromagnetic induction a gap between the heater and the outside or the inside of the circular roller, and when the electromagnetic induction heater is energized, an alternating magnetic field generated by the induction coil of the electromagnetic induction heater is in the circular roller A vortex is generated to cause the circular roller to generate heat.
  • the magnetic conductive metal is one of iron, cobalt and nickel.
  • the electromagnetic induction heater is a high frequency electromagnetic induction heater or an intermediate frequency electromagnetic induction heater.
  • the electromagnetic induction heater is disposed outside the circular roller, and the induction coil of the electromagnetic induction heater is planar.
  • the electromagnetic induction heater is disposed outside the circular roller, and the induction coil of the electromagnetic induction heater has a tile shape.
  • the electromagnetic induction heater is disposed inside the circular roller, and the induction coil of the electromagnetic induction heater is axially wound.
  • the electromagnetic induction heater is disposed inside the circular roller, and the induction coil of the electromagnetic induction heater is radially wound.
  • the driving mechanism comprises a central shaft made of a non-magnetic material, and a tapered head is provided at each end of the central shaft, and the tapered head is made of an insulating material.
  • the circular roller is sleeved on the central shaft and is pressed by a cone at both ends of the central shaft; or the drive mechanism comprises a central shaft made of a non-magnetic material, at each end of the central shaft A cone is disposed on the central shaft, and is pressed by a cone at both ends of the central shaft, and an insulating material layer is disposed between the cone and the circular roller.
  • the electromagnetic induction heater is disposed inside the circular roller, the induction coil of the electromagnetic induction heater is axially wound on the central shaft; or the electromagnetic induction heater is disposed Inside the circular roller, an induction coil of the electromagnetic induction heater is wound radially on the central axis.
  • Another configuration of the present invention is to design an improved bronzing roll comprising a circular roll, a drive mechanism for driving the rotation of the circular roll, and a plurality of stamping templates embedded in the surface of the circular roll
  • the circular roller is made of an alloy of a magnetic conductive metal, a magnetic conductive metal or a magnetic conductive metal
  • the driving mechanism includes a central shaft made of a non-magnetic material, in which the central axis An outer side is provided with an insulating layer, the circular roller is sleeved on the insulating layer, and an electromagnetic induction heater is arranged outside the circular roller. When the electromagnetic induction heater is energized, the electromagnetic induction heater The alternating magnetic field generated by the induction coil generates eddy currents in the circular roller, thereby heating the circular roller.
  • the invention adopts the eddy current method to non-contact heating the steel bronzing roller, and the oil heating device and the control system thereof can be omitted, so that the product structure is simpler, the heating is uniform, the heating degree is fast, the effect is good, the cost is relatively oily.
  • the heat is greatly reduced, easy to use, and easy to popularize.
  • eddy current heating can also be used instead of the original heating rods.
  • Figure 1 is a cross-sectional structural view showing an embodiment of the present invention.
  • Figure 2 is a cross-sectional structural view of A-A of Figure 1.
  • Figure 3 is a schematic view of a variation of Figure 2;
  • Figure 4 is a cross-sectional structural view showing a second embodiment of the present invention.
  • Figure 5 is a cross-sectional structural view showing a second embodiment of the present invention.
  • Figure 6 is a cross-sectional structural view showing a third embodiment of the present invention.
  • FIG. 1 and FIG. 2 disclose a modified bronzing roll comprising a circular roll 1, a drive mechanism 2 for driving the rotation of the circular roll 1, and a circular shape embedded in the circle. a plurality of bronzing templates 11 on the surface of the roller 1.
  • the circular roller 1 is made of a magnetic material having magnetic permeability, and it is obvious that the circular roller 1 can also be made magnetically conductive.
  • the intermediate frequency electromagnetic induction heater 3 (IGBT, obviously, the intermediate frequency electromagnetic induction heater can also be replaced by a high frequency electromagnetic induction heater), and the intermediate frequency electromagnetic induction heater 3 has a gap 12 between the outer side of the circular roller 1
  • the intermediate frequency electromagnetic induction heater 3 is energized (ie, energizing the intermediate frequency generating circuit 33 in the intermediate frequency electromagnetic sensor 3)
  • the alternating magnetic field generated by the induction coil 31 of the electromagnetic induction heater 3 is in the circle.
  • the driving mechanism 2 comprises a non-magnetic material (including but not limited to, such as plastic, or other materials without magnetic permeability, such as copper, aluminum, and alloy materials of copper or aluminum, etc.)
  • the central shaft 21 is provided with a conical head 22, 23 at each end of the central shaft 21, wherein the conical head 22 at one end and the central shaft 21 can be integrally connected, and the conical head 23 at the other end is threaded.
  • the tapers 22, 23 may be designed to be made of an insulating material, or an insulating layer may be provided between the tapers 22, 23 and the center shaft 21.
  • the motor or the transmission system (not shown) drives the central shaft 21 to rotate, thereby driving the circular roller 1 to rotate; this structure is convenient for replacing the circular roller 1, that is, when the replacement is required When the circular roller 1 is described, it is only necessary to loosen the cone 23, and the circular roller 1 can be easily replaced without waiting for the circular roller 1 to be cooled and then replaced, thereby saving the replacement of the circular shape.
  • the time of the roller In the present embodiment, the intermediate frequency electromagnetic induction heater 3 is disposed outside the circular roller 1, and the induction coil 31 of the intermediate frequency electromagnetic induction heater 3 is planar.
  • FIG. 3 is a schematic structural diagram of FIG.
  • the embodiment shown in FIG. 3 has the same general structure as the embodiment shown in FIG. 2, except that the induction coil 31 of the intermediate frequency electromagnetic induction heater 3 has a tile shape 32, that is, when the induction coil 31 is After being wound into a flat shape (such as after the state of the coil in the electromagnetic), it is bent into a tile shape, and its tile-like curvature is the same as that of the circular roller 1.
  • the intermediate frequency electromagnetic induction heater 3 may also be disposed inside the circular roller 1.
  • the induction coil 31 of the intermediate frequency electromagnetic induction heater 3 is axially wound, and the induction coil 31 has an elliptical shape and an elliptical length.
  • the shaft is the same as the axial direction of the circular roller 1; or the intermediate frequency electromagnetic induction heater 3 is disposed inside the circular roller 1, and the induction coil 31 of the intermediate frequency electromagnetic induction heater 3 is radially wound.
  • the induction coil 31 is similar to the structure of a tension spring.
  • FIG. 4 is a cross-sectional structural view of a second embodiment of the present invention.
  • the embodiment shown in FIG. 4 has the same general structure as the embodiment shown in FIG. 1, except that the intermediate frequency electromagnetic induction heater 3 is disposed inside the circular roller 1, and the intermediate frequency electromagnetic induction heater The induction coil 31 of 3 is wound radially on the center shaft 21.
  • FIG. 5 is a cross-sectional structural view of a third embodiment of the present invention.
  • the embodiment shown in FIG. 5 has the same general structure as the embodiment shown in FIG. 1, except that the intermediate frequency electromagnetic induction heater 3 is disposed inside the circular roller 1, and the intermediate frequency electromagnetic induction heating is performed.
  • the induction coil 31 of the device 3 is wound axially on the center shaft 21.
  • two intermediate frequency heaters 3 are used, which are respectively heated inside and outside the circular drum 1, and the heating speed is faster.
  • FIG. 6 shows another structure of the present invention.
  • the improved bronzing roll has substantially the same structure as the bronzing roll shown in FIG. 1, except that there is no taper 22 in this embodiment. 23, an insulating layer 24 is provided on the outside of the center shaft 21, and the circular roller 1 is directly fitted over the insulating layer 24.
  • a modified bronzing roll comprising a circular roll 1, a drive mechanism 2 for driving the rotation of the circular roll 1, and a plurality of stamping templates embedded on the surface of the circular roll 1 11.
  • the circular roller 1 is made of an alloy of a magnetic conductive metal, a magnetic conductive metal or a magnetic conductive metal
  • the driving mechanism 2 includes a central shaft 21 made of a non-magnetic material.
  • An outer surface of the central shaft 21 is provided with an insulating layer 24, and the circular roller 1 is sleeved on the insulating layer 24.
  • An electromagnetic induction heater 3 is disposed outside the circular roller 1 when the electromagnetic induction After the heater 3 is energized, the alternating magnetic field generated by the induction coil 31 of the electromagnetic induction heater 3 generates eddy currents in the circular drum 1, thereby causing the circular roller 1 to generate heat.
  • the electromagnetic induction heater 3 of the present invention can also be applied to a laminating roller that requires heating to replace the original heating rod.

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  • General Induction Heating (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Description

[根据细则37.2由ISA制定的发明名称]　 烫金辊
技术领域
　　本发明涉及一种改进型烫金辊，特别是用在圆压圆烫金机上的烫金辊。
背景技术
　　在印刷的加工工艺中，烫金是常见的，最常用的热烫可分为平烫和圆烫，热烫常用的加热方式有电热和油热。电热是给加热板内的电阻丝通电使发热并用温控器稳定其温度。其结构简单成本低，广泛用于平烫。
　　现有的圆压圆烫金机中所使用的烫金辊，包括圆形辊筒、设置在圆形辊筒内的油热辊，以及设置在圆形辊筒表面的数个烫金模板，所述油热辊与所述圆形辊筒过渡配合，这种烫金辊通常采用油热方式进行加热。所谓油热其实也是电热，它是加热器放在油箱中，油的温度用温控器稳定，经过加热的油用油泵经油管送到油热辊一端，流过油热辊内部，由另一端流出，经油管流回油箱。在这热油一进一出中，油热辊被热油加热，油热辊进而再加热圆形辊筒和烫金模板；也有的油热辊中的热油是从一端进，同是也从该端出，这种油热辊是热油从进油口进入到油热辊内后，再折回后从位于相同端的出油口流出，经油管流回油箱。此系统结构复杂，工艺要求高造价高，油箱体积大，高温的油箱在车间里散热会带来高温的环境等不利因素制约了它的广泛应用。此外，这种烫金辊更换圆形辊筒时，需要的时间长，它需要将整个烫金辊冷却到可以操作时，才可以将油热辊与圆形辊筒分离，从而换上新的圆形辊筒，如果要等到整个烫金辊冷却，一般情况下一个330毫米长的烫金辊需要4个小时左右，这样就会影响到整个流水线的作业，损失很大；所以，有些用户为节省换辊时，就采取拆下整个烫金辊，换上新的烫金辊，这样用户就不得不多配几套烫金辊配用，如此，不仅占用用户的库存地方，而且还要增加烫金辊的库存量及占用流动资金，增加保管烫金辊的成本；而且油热加热的加热速度慢，它需要先将冷油加热后，才可以再加热烫金辊，需要一定时间，对连续作业线的生产影响较大。
发明内容
　　本发明目的是克服上述缺陷，提供一种结构简单、加热速度快，烫金辊温度均匀的改进型烫金辊。
　　本发明的另一个目的是提供一种方便拆卸的烫金辊。
　　本发明可以通过以下技术方案实现：设计一种改进型烫金辊，包括圆形辊筒，驱动所述圆形辊筒旋转的驱动机构，以及嵌设在圆形辊筒表面上的数个烫金模板，所述圆形辊筒是用导磁性金属、导磁性金属的氧化物或者导磁性金属的合金制作而成，在所述圆形辊筒外侧或内侧设有电磁感应加热器，所述电磁感应加热器与所述圆形辊筒外侧或内侧之间有间隙，当所述电磁感应加热器被通电后，电磁感应加热器的感应线圈所产生的交变磁场，在所述圆形辊筒内产生涡流，从而使所述圆形辊筒发热。
　　本发明中，所述导磁性金属是铁、钴和镍中的一种。
　　本发明中，所述电磁感应加热器是高频电磁感应加热器或中频电磁感应加热器。
　　本发明中，所述电磁感应加热器设置在所述圆形辊筒的外侧，电磁感应加热器的感应线圈呈平面状。
　　作为对本发明的改进，所述电磁感应加热器设置在所述圆形辊筒的外侧，电磁感应加热器的感应线圈呈瓦片状。
　　作为对本发明的进一步改进，所述电磁感应加热器设置在所述圆形辊筒的内侧，电磁感应加热器的感应线圈呈轴向缠绕。
　　作为对本发明的进一步改进，所述电磁感应加热器设置在所述圆形辊筒的内侧，电磁感应加热器的感应线圈呈径向缠绕。
　　作为对本发明的进一步改进，所述驱动机构包括用非导磁性的材料制作的中轴，在所述中轴的两端各设有一个锥头，所述锥头是用绝缘材料制用的，所述圆形辊筒套在所述中轴上，被中轴两端的锥头压紧；或者所述驱动机构包括用非导磁性的材料制作的中轴，在所述中轴的两端各设有一个锥头，所述圆形辊筒套在所述中轴上，被中轴两端的锥头压紧，在所述锥头与所述圆形辊筒之间设有绝缘材料层。
　　作为对本发明的进一步改进，所述电磁感应加热器设置在所述圆形辊筒的内侧，电磁感应加热器的感应线圈呈轴向缠绕在所述中轴上；或者所述电磁感应加热器设置在所述圆形辊筒的内侧，电磁感应加热器的感应线圈呈径向缠绕在所述中轴上。
　　本发明的另一种结构是，设计一种改进型烫金辊，包括圆形辊筒，驱动所述圆形辊筒旋转的驱动机构，以及嵌设在圆形辊筒表面上的数个烫金模板，所述圆形辊筒是用导磁性金属、导磁性金属的氧化物或者导磁性金属的合金制作而成，所述驱动机构包括用非导磁性的材料制作的中轴，在所述中轴外侧设有绝缘层，所述圆形辊筒套在所述绝缘层上，在所述圆形辊筒外侧设有电磁感应加热器，当所述电磁感应加热器被通电后，电磁感应加热器的感应线圈所产生的交变磁场，在所述圆形辊筒内产生涡流，从而使所述圆形辊筒发热。
　　本发明使用涡流方式对钢制的烫金辊进行非接触式的加热，可以省去油加热装置及其控制系统，使该产品结构更加简单、加热均匀且加热整度快，效果好，成本较油热大幅降低，使用方便，便于广泛推广。对于需要加热使用的覆膜辊也可以使用涡流加热代替原来的加热棒。
附图说明
　图1是本发明一种实施例的剖视结构示意图。
　图2是图1中A-A的剖视结构示意图。
　图3是图2的一种变化后的结构示意图。
　图4是本发明第二种实施例的剖视结构示意图。
　图5是本发明第二种实施例的剖视结构示意图。
　图6是本发明第三种实施例的剖视结构示意图。
具体实施方式
请参见图1和图2，图1和图2揭示的是一种改进型烫金辊，包括圆形辊筒1，驱动所述圆形辊筒1旋转的驱动机构2，以及嵌设在圆形辊筒1表面的数个烫金模板11，本发明中，所述圆形辊筒1是用具有导磁性的钢材制作而成的，很显然，所述圆形辊筒1也可以用具有导磁性的铁合金或铁的氧化物制作，也可以用钴或镍，及钴或镍的氧化物，或者钴或镍等的各种合金材料，如不锈钢等；在所述圆形辊筒1外侧设有中频电磁感应加热器3（IGBT，显然，中频电磁感应加热器也可以用高频电磁感应加热器代替），所述中频电磁感应加热器3与所述圆形辊筒1外侧之间有间隙12，当所述中频电磁感应加热器3被通电后（即给中频电磁感应器3中的中频发生电路33通电），电磁感应加热器3的感应线圈31所产生的交变磁场，在所述圆形辊筒1内产生涡流，从而使所述圆形辊筒1发热。本实施例中，所述驱动机构2包括用非导磁性的材料（包括但不限于，如塑料，或其它没有导磁性的材料，如铜、铝，及铜或铝的合金材料等）制作的中轴21，在所述中轴21的两端各设有一个锥头22、23，其中一端的锥头22与所述中轴21可以是连为一体的，另一端的锥头23通过螺纹与所述中轴21连接，当所述圆形辊筒1套在所述中轴21上后，拧紧所述锥头23可以将所述圆形辊筒1压紧，必要是为了达到锥头22、23与中轴21绝缘，可以将锥头22、23设计成用绝缘材料制作，或者，也可以在锥头22、23与中轴21之间设置绝缘层。电动机或传动系统（未画出）带动中轴21旋转，即可带动圆形辊筒1旋转；这种结构，很方便于更换所述圆形辊筒1，也就是说，当需要拆换所述圆形辊筒1时，只需要松开所述锥头23，就可以很方便地拆换圆形辊筒1，而不需要等圆形辊筒1冷却后再换，节省了更换圆形辊筒的时间。本实施例中，所述中频电磁感应加热器3设置在所述圆形辊筒1的外侧，中频电磁感应加热器3的感应线圈31呈平面状。
请参见图3，图3是图2的一种变化后的结构示意图。图3所示实施例与图2所示实施例相比，其大体结构相同，所不同的是中频电磁感应加热器3的感应线圈31呈瓦片状32，也就是说，当感应线圈31被绕成平面状后（如电磁中的线圈状态后），再被弯成瓦片状，其瓦片状的弧度与圆形辊筒1的弧度相同。当然，所述中频电磁感应加热器3也可以设置在所述圆形辊筒1的内侧，中频电磁感应加热器3的感应线圈31呈轴向缠绕，感应线圈31呈椭圆形，椭圆形的长轴与所述圆形辊筒1的轴向相同；或者所述中频电磁感应加热器3设置在所述圆形辊筒1的内侧，中频电磁感应加热器3的感应线圈31呈径向缠绕，感应线圈31类似于拉簧一样的结构。
请参见图4，图4是本发明第二种实施例的剖视结构示意图。图4所示实施例与图1所示实施例相比，其大体结构相同，所不同的是所述中频电磁感应加热器3设置在所述圆形辊筒1的内侧，中频电磁感应加热器3的感应线圈31呈径向缠绕在所述中轴21上。
请参见图5，图5是本发明第三种实施例的剖视结构示意图。图5所示实施例与图1所示实施例相比，其大体结构相同，所不同的是，所述中频电磁感应加热器3设置在所述圆形辊筒1的内侧，中频电磁感应加热器3的感应线圈31呈轴向缠绕在所述中轴21上。
图4和图5中采用的是两个中频加热器3，分别在圆形辊筒1的内外进行加热，其加热速度更快。当然，也可以只使用一个内加热的中频电磁感应加热器3。
请参见图6，图6所示的是本发明的另一种结构，这种改进型烫金辊与图1所示的烫金辊的结构大体相同，所不同的是本实施例中没有锥头22、23，而是在中轴21的外面设有绝缘层24，将圆形辊筒1直接套在所述绝缘层24外面。具体地说，它是一种改进型烫金辊，包括圆形辊筒1，驱动所述圆形辊筒1旋转的驱动机构2，以及嵌设在圆形辊筒1表面上的数个烫金模板11，所述圆形辊筒1是用导磁性金属、导磁性金属的氧化物或者导磁性金属的合金制作而成，所述驱动机构2包括用非导磁性的材料制作的中轴21，在所述中轴21外侧设有绝缘层24，所述圆形辊筒1套在所述绝缘层24上，在所述圆形辊筒1外侧设有电磁感应加热器3，当所述电磁感应加热器3被通电后，电磁感应加热器3的感应线圈31所产生的交变磁场，在所述圆形辊筒1内产生涡流，从而使所述圆形辊筒1发热。
本发明中的电磁感应加热器3也可以应用在对于需要加热使用的覆膜辊中来代替原来的加热棒。

Claims (1)

1、一种改进型烫金辊，包括圆形辊筒，驱动所述圆形辊筒旋转的驱动机构，以及嵌设在圆形辊筒表面上的数个烫金模板，其特征在于，所述圆形辊筒是用导磁性金属、导磁性金属的氧化物或者导磁性金属的合金制作而成，在所述圆形辊筒外侧或内侧设有电磁感应加热器，所述电磁感应加热器与所述圆形辊筒外侧或内侧之间设有间隙，当所述电磁感应加热器被通电后，电磁感应加热器的感应线圈所产生的交变磁场，在所述圆形辊筒内产生涡流，从而使所述圆形辊筒发热。
2、根据权利要求1所述的改进型烫金辊，其特征在于，所述导磁性金属是铁、钴和镍中的一种。
3、根据权利要求1或2所述的改进型烫金辊，其特征在于，所述电磁感应加热器是高频电磁感应加热器或中频电磁感应加热器。
4、根据权利要求1或2所述的改进型烫金辊，其特征在于，所述电磁感应加热器设置在所述圆形辊筒的外侧，电磁感应加热器的感应线圈呈平面状。
5、根据权利要求1或2所述的改进型烫金辊，其特征在于，所述电磁感应加热器设置在所述圆形辊筒的外侧，电磁感应加热器的感应线圈呈瓦片状。
6、根据权利要求1或2 所述的改进型烫金辊，其特征在于，所述电磁感应加热器设置在所述圆形辊筒的内侧，电磁感应加热器的感应线圈呈轴向缠绕。
7、根据权利要求1或2所述的改进型烫金辊，其特征在于，所述电磁感应加热器设置在所述圆形辊筒的内侧，电磁感应加热器的感应线圈呈径向缠绕。
8、根据权利要求1或2 所述的改进型烫金辊，其特征在于，所述驱动机构包括用非导磁性的材料制作的中轴，在所述中轴的两端各设有一个锥头，所述锥头是用绝缘材料制用的，所述圆形辊筒套在所述中轴上，被中轴两端的锥头压紧；或者所述驱动机构包括用非导磁性的材料制作的中轴，在所述中轴的两端各设有一个锥头，所述圆形辊筒套在所述中轴上，被中轴两端的锥头压紧，在所述锥头与所述圆形辊筒之间设有绝缘材料层。
9、一种改进型烫金辊，包括圆形辊筒，驱动所述圆形辊筒旋转的驱动机构，以及嵌设在圆形辊筒表面上的数个烫金模板，其特征在于，所述圆形辊筒是用导磁性金属、导磁性金属的氧化物或者导磁性金属的合金制作而成，所述驱动机构包括用非导磁性的材料制作的中轴，在所述中轴外侧设有绝缘层，所述圆形辊筒套在所述绝缘层上，在所述圆形辊筒外侧设有电磁感应加热器，当所述电磁感应加热器被通电后，电磁感应加热器的感应线圈所产生的交变磁场，在所述圆形辊筒内产生涡流，从而使所述圆形辊筒发热。
10、根据权利要求9所述的改进型烫金辊，其特征在于，所述电磁感应加热器设置在所述圆形辊筒的外侧，电磁感应加热器的感应线圈呈平面状；或者所述电磁感应加热器设置在所述圆形辊筒的外侧，电磁感应加热器的感应线圈呈瓦片状。
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