Heating barrel of transfer machine

Abstract

The invention provides a heating barrel of a transfer machine. A barrel body of the heating barrel of the transfer machine successively comprises a first shell, a tin alloy layer, a second shell, a heating layer, a third shell, an insulating layer and a fourth shell from outside to inside; a through hole which penetrates through the barrel body is formed in the center of the barrel body; aluminumalloy end caps are arranged on two sides of the barrel body; a bearing hole is formed in the center of each end cap; two ends of the first shell, two ends of the second shell, two ends of the third shell and two ends of the fourth shell are separately welded to the aluminum alloy end caps; the heating layer comprises a plurality of heating tubes and heat-conduction oil; the heating tubes are uniformly distributed in the heating layer; and two ends of each heating tube are separately fixed to the aluminum alloy end caps. The temperature of the surface of the heating barrel of the transfer machine can be maintained between 180 DEG C and 183 DEG C for a long time, the heating barrel of the transfer machine is suitable for optimal heat transfer printing temperatures of most of heat transfer printing products, is high in heating speed, uniform in heating, continuous and abundant in heat source, good in constant temperature property, safe to use and low in heat loss, resists slight shock, can also work normally even at low temperature, and is suitable for various heat transfer 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. 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 the transfer printing machine , Th...

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Problems solved by technology

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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