Heating cylinder with two thermostatic modes of transfer printing machine

Abstract

The invention discloses a heating cylinder with two thermostatic modes of a transfer printing machine. According to the heating cylinder, a cylinder body sequentially comprises a first shell, a tin alloy layer, a second shell, a heating layer, a third shell, a heat preservation layer and a fourth shell from outside to inside; a through hole penetrating through the cylinder body is formed in the center of the cylinder body; aluminum alloy end covers are arranged on the two sides of the cylinder body; bearing holes are formed in the center of the end cover; the two ends of the first shell, the second shell, the third shell and the fourth shell are welded to the aluminum alloy end covers; temperature control devices are arranged at one ends of the aluminum alloy end covers and are connected to temperature sensing pipes, and the temperature sensing pipes are fixed inside the first shell and are inserted into the tin alloy layer; the tin alloy layer comprises soldering tin and metallic tin;and the heating layer comprises a heating pipe and heat conduction oil. The heating cylinder with the two thermostatic modes of the transfer printing machine has the advantages that the surface temperature of the heating cylinder can be kept with 180-183 DEG C or 229-232 DEG C, the heating speed is high, heating is uniform, a heat source is continuous and abundant, the thermostatic performance isgood, the heat loss is small, and the heating cylinder is applicable to various heat transfer printing machines.

Description

technical field [0001] The invention belongs to the field of heat transfer printing, and in particular relates to a heating cylinder of a transfer printing machine with two constant temperature modes. Background technique [0002] Thermal transfer printing is a new printing process in recent years. The printing method of this process is divided into two parts: transfer film printing and transfer processing. Press) to transfer the exquisite pattern on the transfer film to the surface of the product. The printed pattern is rich in layers, bright in color, ever-changing, small in color difference, and good in reproducibility. It can meet the requirements of the designer and is suitable for mass production. [0003] When the transfer printing machine is working, it is heated by the heating element, and the heat is transferred to the surface of the outer cylinder. After the cylinder rotates, the color of the transfer paper can be transferred to the printing target. Therefore, for...

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Problems solved by technology

[0003] When the transfer printing machine is working, it is heated by the heating element, and the heat is transferred to the surface of the outer cylinder. After the cylinder rotates, the color of the transfer paper can be transferred to the printing target. Therefore, for the transfer printing machine , the performance of the heating cylinder has an important impact on the transfer effect; some current thermal transfer inks are more sensitive to temperature, and when the transfer temperature is not uniform, the transfer pattern is prone to color difference

The heating cylinder of the transfer printing machine that is common in the market is a closed cylinder, the two ends of the cover are connected with the cylinder body by electric welding, the center of the end cover has a bearing hole, and the straight heating tube is erected in the middle of the cylinder through the bearing hole. There are many deficiencies in the actual use of the printing machine heating cylinder, which are manifested in: 1) The straight heating tube erected in the middle of the cylinder is far away from the surface of the cylinder, and the heat transfer rate of the air is relatively slow, which is difficult for large-volume heating cylinders. Generally speaking, the heating time is long, which takes about one hour. When the surface of the heating cylinder reaches the required temperature, due to the long distance of the heat source, it cannot achieve immediate constant temperature or cooling. This kind of heating cylinder with slow heating and cooling is not suitable for small Large-scale production; 2) The two ends of the cylinder with a certain thickness consume more heat energy during the heating process, which also leads to a large temperature difference between the two ends and the middle of the heating cylinder, uneven heating, and different surface temperatures of the cylinder body. The transfer product has serious color difference; at the same time, the surface temperature of the cylinder body is different, which will cause hot tear or cold tear treatment, and the surface of the layer is easy to tear and damage; 3) limited by the area of ​​the bearing hole, the number of heat pipes that can be erected is small , generally no more than 5 pieces. Therefore, in order to obtain the high temperature required by the surface of the cylinder, the heating tube heated in the middle has a large power. Because the distance between the heating tube and the surface of the cylinder is long, its constant temperature is difficult to control. Usually It cannot work normally when the ambient temperature is below 0°C

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