A sealed heating roller and a manufacturing method thereof

Abstract

The present application relates to heat transfer printing machine technical field, especially to a kind of sealed heating roller and its manufacturing method, including roller, at least one circular is provided in roller, at most four vacuum inner cylinders of cross section are sector, vacuum inner cylinder is evenly distributed along the circumferential direction, at least four groups of heating pipes are installed in roller, heating pipe is installed at the gap between vacuum inner cylinder and vacuum inner cylinder.This application roller is sealed as a whole, uses heating pipe to heat the heat conducting oil in the interior, avoids contact with air, prevents carbon deposition, coking from happening;The design of four vacuum inner cylinders reduces the amount of heat conducting oil, saves cost, at the same time because the amount of heat conducting oil is less, it has the advantages of fast heating and low energy consumption, so that only four heating pipes can meet the heating demand, so that the number of electric heating pipe is less, cost is further reduced, and the probability of roller oil penetration is also reduced;The design of four vacuum inner cylinders can also reduce the sealed roller.

Description

Technical Field

[0001] This invention relates to the field of heat transfer printing machine technology, and in particular to a sealed roller and a method for manufacturing a sealed heating roller. Background Technology

[0002] Roller-type heat transfer printing machines are high-efficiency printing equipment for textiles, non-woven fabrics, chemical fibers, and webbing. They utilize heated rollers to bond textiles, non-woven fabrics, chemical fibers, and webbing with transfer printing paper or transfer paper for printing sublimation patterns. Through the heat-pressing action of a high-temperature resistant blanket and the heated rollers, the pattern on the transfer printing paper or transfer paper for printing sublimation patterns is transferred onto the textiles, non-woven fabrics, chemical fibers, and webbing, thereby achieving the purpose of transfer printing.

[0003] Traditional heated rollers, such as the vacuum-filled oil heat transfer device and method for avoiding carbon buildup and coking in roller heat transfer machines disclosed in patent number CN110077103A, include a frame, a roller, and an oil tank. Both the roller and the oil tank are mounted on the frame, with the lowest point of the oil tank higher than the highest point of the roller. A rotary joint is located at one end of the roller, and an oil guide pipe connects the oil tank and the rotary joint. An oil layer is present inside the roller, and a vacuum layer is located within the oil layer. An electric heating element is installed within the oil layer. A first exhaust port communicating with the oil layer is located near the top of one end of the roller, and a second exhaust port communicating with the vacuum layer is located near the bottom of one end of the roller. This invention allows the roller to be filled with oil through the oil tank, and air can be completely discharged through the first exhaust port on the roller. When the electric heating element heats the heat-conducting oil in the oil layer, the heat-conducting oil inside the roller is completely isolated from air, thus preventing carbon buildup and coking.

[0004] However, this patent requires the oil tank and oil guide pipe to be placed next to the roller, which increases the size of the equipment. Furthermore, during operation, the heat transfer oil in the roller will be transferred to the oil tank during the heating process, which may cause burns if the operator accidentally touches the oil tank. Summary of the Invention

[0005] The purpose of this invention is to provide a sealed roller and its manufacturing method to solve the technical problems of complex structure, large footprint and high risk of heat transfer rollers in the prior art.

[0006] The present invention provides a sealed roller, comprising a roller, wherein the roller has four fan-shaped vacuum inner cylinders inside, the four vacuum inner cylinders being evenly distributed along the circumference, and four heating tubes being installed inside the roller, the heating tubes being installed in the gaps between the vacuum inner cylinders.

[0007] Furthermore, sensors are installed on the heating tubes located inside the roller.

[0008] A sealed heating roller and its manufacturing method include the following steps:

[0009] (a) Install the heating tube inside the roller and fix the four vacuum inner cylinders inside the roller.

[0010] (ii) Calculate the total amount of heat transfer oil to be injected into the roller based on the coefficient of thermal expansion of the heat transfer oil after heating, and inject a fixed amount of heat transfer oil into the roller.

[0011] (iii) Remove excess air from inside the roller.

[0012] (iv) Start the heating element.

[0013] (v) Sensors monitor the oil loss situation inside the roller.

[0014] Furthermore, the amount of heat transfer oil injected is equal to the volume of the roller (1) minus the volume of the vacuum inner cylinder (2) divided by the expansion coefficient of the heat transfer oil.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] Firstly, the roller is completely sealed, and a heating tube is used to heat the internal heat transfer oil, thus avoiding contact with air and preventing carbon buildup and coking. Secondly, this invention calculates the total amount of heat transfer oil to be injected into the roller based on the coefficient of thermal expansion of the oil after heating, and injects a fixed amount of heat transfer oil into the roller while reserving space for expansion. When this invention is put into use, the heat transfer oil inside the roller expands after heating and fills the entire roller, allowing the heat transfer oil to evenly transfer heat to the roller. This effectively solves the technical problems of complex structure, large footprint, and high risk associated with existing heat transfer rollers.

[0017] Secondly, the design of four vacuum inner cylinders reduces the amount of heat transfer oil used, saving costs. At the same time, because of the small amount of heat transfer oil used, it has the advantages of fast heating and low energy consumption. As a result, only four heating tubes are needed to meet the heating requirements, which reduces the number of electric heating tubes, further reducing costs, and also reducing the chance of oil leakage from the rollers.

[0018] Thirdly, the design of four vacuum inner cylinders can reduce the overall weight of the sealed roller, reduce the load on the drive motor, and make the roller structure more stable.

[0019] Fourth, the heating tube is equipped with a sensor to monitor the oil loss in the roller. When the heating oil in the roller is lost to a predetermined value, the temperature change of the heating tube triggers the sensor to remind the operator to replace the equipment. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the first structure in which the heating tube is installed in the roller in this invention;

[0023] Figure 3 This is a schematic diagram of the second structure in which the heating tube is installed in the roller in this invention;

[0024] Reference numerals: Roller 1, Vacuum inner cylinder 2, Heating tube 3. Detailed Implementation

[0025] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0027] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] Example 1:

[0031] A sealed roller 1 has four fan-shaped vacuum inner cylinders 2 inside the roller 1. The four vacuum inner cylinders 2 are evenly distributed along the circumference. Four heating tubes 3 are installed inside the roller 1 and are installed in the gap between the vacuum inner cylinders 2.

[0032] The roller 1 of the present invention is completely sealed, and the heating tube 3 is used to heat the internal heat transfer oil, thus avoiding contact with air and preventing carbon buildup and coking. At the same time, because the heat transfer oil will expand after heating, it does not need to be filled to the top. A certain space can be reserved according to the expansion coefficient of the heat transfer oil, and the expanded heat transfer oil after heating can fill the roller 1.

[0033] The design of the four vacuum inner cylinders 2 in this invention reduces the amount of heat transfer oil used, saving costs. At the same time, because of the small amount of heat transfer oil used, it has the advantages of fast heating and low energy consumption. As a result, only four heating tubes 3 are needed to meet the heating requirements, which reduces the number of electric heating tubes 3 and further reduces costs. In addition, the more electric heating tubes 3 there are, the more sealing installation points are required. The reduction in the number of electric heating tubes 3 also reduces the probability of oil leakage from the roller 1.

[0034] The design of the four vacuum inner cylinders 2 in this invention can also reduce the overall weight of the sealed roller 1, reduce the load on the drive motor, and make the roller 1 itself more stable.

[0035] Example 2:

[0036] A sensor is installed on the heating tube 3 located inside the roller 1 in this invention.

[0037] The heating tube 3 is equipped with a sensor to monitor the oil loss in the roller 1. When the heating oil in the roller 1 is lost to a predetermined value, the temperature change of the heating tube 3 triggers the sensor to remind the operator to replace the equipment.

[0038] A method for manufacturing a sealed heating roller includes the following steps:

[0039] (i) The heating tube 3 is installed inside the roller 1. During operation, the heating tube 3 can heat the heat transfer oil inside the roller 1, so that the heat transfer oil can transfer heat energy. The four vacuum inner cylinders 2 are fixed inside the roller 1. The four vacuum inner cylinders 2 can reduce the amount of heat transfer oil used, thereby reducing the production cost of the present invention. At the same time, since the amount of heat transfer oil used is small, the overall heating speed of the heat transfer oil is accelerated, thereby reducing the energy consumption of the present invention.

[0040] (ii) Calculate the total amount of heat transfer oil to be injected into roller 1 based on the coefficient of thermal expansion of the heat transfer oil after heating. Inject a fixed amount of heat transfer oil into roller 1. While injecting the heat transfer oil, reserve expansion space for the heat transfer oil. When the present invention is put into use, the heat transfer oil inside roller 1 expands after heating and fills the entire roller 1, so that the heat transfer oil can evenly transfer heat to roller 1 to achieve heat transfer. At the same time, the reserved expansion space can prevent the expansion of the heat transfer oil after heating from releasing expansion force on roller 1, causing roller 1 to deform and affecting the service life of roller 1.

[0041] (iii) Remove excess air from inside roller 1 to prevent excessive air pressure in roller 1 from affecting the thermal expansion coefficient of the heat transfer oil, so that the heat transfer oil inside roller 1 cannot fill the entire inside of roller 1 after expansion, ultimately affecting the heat transfer effect.

[0042] (iv) Start the heating tube 3 to heat the heat transfer oil inside the roller 1. The heat transfer oil inside the roller expands continuously during the heating process, so that the volume of the heat transfer oil just fills the entire inside of the roller 1.

[0043] (v) The loss of oil in roller 1 is monitored by a sensor. When the heating oil in roller 1 is lost to a predetermined value, the temperature change of heating tube 3 triggers the sensor to remind the operator to replace the equipment.

[0044] Preferably, the amount of heat transfer oil injected is equal to the volume of roller 1 minus the volume of vacuum inner cylinder 2, divided by the expansion coefficient of the heat transfer oil.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealed heating roller, characterized in that: The roller (1) includes four fan-shaped vacuum inner cylinders (2) inside the roller (1). The four vacuum inner cylinders (2) are evenly distributed along the circumference. Four heating tubes (3) are installed inside the roller (1). The heating tubes (3) are installed in the gap between two adjacent vacuum inner cylinders (2). Heat transfer oil is added to the roller (1). The volume of the heat transfer oil is equal to the volume of the roller (1) minus the volume of the vacuum inner cylinders (2) divided by the expansion coefficient of the heat transfer oil after heating. Excess air inside the roller (1) is removed.

2. The sealed heating roller according to claim 1, characterized in that: A sensor is installed on the heating tube (3) located inside the roller (1).

3. A method for manufacturing a sealed heating roller based on claim 2, characterized in that, Includes the following steps: (a) Install the heating tube (3) inside the roller (1) and fix the four vacuum inner cylinders (2) inside the roller (1); (ii) Calculate the total amount of heat transfer oil to be injected into the roller (1) based on the coefficient of thermal expansion of the heat transfer oil after heating, and inject a fixed amount of heat transfer oil into the roller (1). (iii) Remove excess air from inside the roller (1); (iv) Start the heating element (3); (v) The sensor monitors the oil loss in the roller (1).

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