A heating device for PP sheet and rolling roller

Abstract

This utility model relates to a heating device for PP sheets and rolling rollers, belonging to the technical field of PP sheet processing equipment. The heating device includes three layers of aluminum alloy plates, a ceramic heating rod, a cooling fan, a temperature sensing probe, and an electrical control box. The three layers of aluminum alloy plates are fixedly connected by bolts. The ceramic heating rod, cooling fan, and temperature sensing probe are all mounted on the aluminum alloy plates, and the ceramic heating rod is electrically connected to the electrical control box. Based on the parameters provided by the temperature sensing probe, the electrical control box dynamically adjusts the heating power of the ceramic heating rod according to the set temperature parameters. Simultaneously, it can coordinate the heat dissipation efficiency of the cooling fan, ensuring that the contact surface temperature remains stable within the required process range.

Description

Technical Field

[0001] This utility model relates to the technical field of PP sheet processing equipment, and in particular to a heating device for PP sheets and rolling rollers. Background Technology

[0002] In the composite processing of PP sheets and PP honeycomb core materials, the bonding devices of existing composite equipment have several technical defects. First, the 500mm cooling distance during the transfer of the PP sheet from the extrusion die exit to the pressing roller causes a drop in sheet temperature, affecting bonding performance. Second, the composite device lacks an effective heating medium, resulting in insufficient surface temperature of the pressing roller. When the PP sheet comes into contact with the honeycomb core material, the temperature drops sharply, preventing the two materials from effectively bonding. Furthermore, the negative pressure adsorption design of the PP honeycomb roller carries away some heat from the honeycomb core material, further weakening the bonding strength. The excessive wrap angle between the PP honeycomb core material and the roller also causes a continuous temperature drop during the material's residence on the roller surface. These technical defects directly lead to quality problems such as delamination, bulging, and hollowing in the composite products, severely impacting the production yield. Although existing equipment has undergone multiple adjustments, it still cannot meet production requirements, necessitating the development of a heating device for PP sheets and the pressing roller to solve these technical problems. Utility Model Content

[0003] This utility model provides a heating device for PP sheets and rolling rollers, which adopts the following technical solution: the heating device includes three layers of aluminum alloy plates, a ceramic heating rod, a cooling fan, a temperature sensing probe, and an electrical control box; the three layers of aluminum alloy plates are fixedly connected by bolts, the ceramic heating rod, the cooling fan, and the temperature sensing probe are all mounted on the aluminum alloy plates, and the ceramic heating rod, the cooling fan, and the temperature sensing probe are all electrically connected to the electrical control box.

[0004] Furthermore, all three aluminum alloy plates are semi-circular aluminum alloy plates, and the three aluminum alloy plates include a first aluminum alloy plate, a second aluminum alloy plate, and a third aluminum alloy plate.

[0005] Furthermore, the ceramic heating rod consists of three rods, which are welded and fixed to the second aluminum alloy plate. The conversion of electrical energy into heat energy is achieved through an electrical control box, and the heating temperature range is 130-160℃.

[0006] Furthermore, insulation cotton is sandwiched between the second and third aluminum alloy plates, and the cooling fan is installed on the first aluminum alloy plate to control the heat dissipation rate of the heating device.

[0007] Furthermore, the inner diameter of the first layer of aluminum alloy plate is 5mm larger than that of the rolling roller.

[0008] Furthermore, the first aluminum alloy plate has a length of 1720mm and a width of 410mm; the second aluminum alloy plate has a length of 1752mm and a width of 474mm; and the third aluminum alloy plate has a length of 1770mm and a width of 516mm.

[0009] Furthermore, the heating device is provided with a roller shaft hole for connecting to the roller.

[0010] Furthermore, the ceramic heating rod has a diameter of 30 mm.

[0011] In summary, this utility model has the following beneficial technical effects:

[0012] 1. This utility model provides a heating device for PP sheets and rolling rollers, and its three-layer aluminum alloy plate structure. The heating device includes three layers of aluminum alloy plates, a ceramic heating rod, a cooling fan, a temperature sensing probe, and an electrical control box. The three layers of aluminum alloy plates are fixedly connected by bolts. The ceramic heating rod, the cooling fan, and the temperature sensing probe are all mounted on the aluminum alloy plates. The ceramic heating rod, the temperature sensing probe, and the cooling fan are all electrically connected to the electrical control box. The electrical control box controls the heating power of the ceramic heating rod and the heat dissipation power of the cooling fan to achieve precise temperature control. This effectively solves the problem of poor adhesion caused by temperature drop during the transmission of PP sheets. It has the advantages of maintaining stable heating temperature, improving the bonding quality of PP sheets and honeycomb core materials, and reducing delamination and hollow defects. Attached Figure Description

[0013] Figure 1 This is a top view of the present invention;

[0014] Figure 2 This is a schematic diagram of the end structure of this utility model.

[0015] Explanation of reference numerals in the attached diagram: 1. First layer aluminum alloy plate; 2. Second layer aluminum alloy plate; 3. Third layer aluminum alloy plate; 4. Ceramic heating rod; 5. Cooling fan; 6. Temperature sensing probe; 7. Bolt; 8. Roller shaft hole. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings.

[0017] like Figure 1 and Figure 2A specific embodiment of a heating device for PP sheets and rolling mills is shown. The heating device includes three layers of aluminum alloy plates, a ceramic heating rod 4, a cooling fan 5, a temperature sensing probe 6, and an electrical control box. The heating device is provided with a rolling mill shaft hole 8 for connecting the rolling mill. The three layers of aluminum alloy plates are fixedly connected by bolts 7. The ceramic heating rod 4, the cooling fan 5, and the temperature sensing probe 6 are all mounted on the aluminum alloy plates. The ceramic heating rod 4, the cooling fan 5, and the temperature sensing probe 6 are all electrically connected to the electrical control box.

[0018] Specifically, the roller shaft hole 8 refers to the through hole that penetrates the main structure of the heating device. It can be implemented by adopting a circular hole structure that matches the outer diameter of the roller, and is used to realize the axial assembly and positioning of the heating device and the roller.

[0019] Specifically, the three-layer aluminum alloy plate can be achieved by stacking aluminum alloy plates of different sizes and connecting them with bolts 7 to form a stable heat conduction carrier. The ceramic heating rod 4 directly contacts the aluminum alloy plate to transfer heat. The cooling fan 5 forms a directional airflow channel for heat dissipation through rectangular holes formed in the aluminum alloy plate. The temperature sensing probe 6 is a temperature detection device that monitors the temperature of the contact area in real time. The electrical control box is the temperature control system, which can adjust the heating power and cooling fan speed based on sensor data.

[0020] Specifically, three layers of aluminum alloy plates are mechanically connected to form a stable support structure, providing a mounting base for the heating elements. The ceramic heating rod 4 is in close contact with the aluminum alloy plates, converting electrical energy into heat energy and conducting it to the contact surface of the rolling roller. The cooling fan 5 forms an airflow channel through the rectangular holes in the aluminum alloy plates, activating forced cooling when the temperature exceeds a set threshold. A temperature sensing probe 6 collects real-time contact surface temperature data and transmits it to the electrical control box to form a closed-loop control circuit. The electrical control box dynamically adjusts the heating power of the ceramic heating rod 4 according to the set temperature parameters, while simultaneously coordinating the operating frequency of the cooling fan 5 to stabilize the contact surface temperature within the required process range.

[0021] Specifically, the ceramic heating rod 4 has a diameter of 30mm. The 30mm diameter ensures that the contact area between the ceramic heating rod 4 and the aluminum alloy plate is suitable, which avoids heat accumulation and local overheating, while maintaining heat transfer efficiency.

[0022] Specifically, the three aluminum alloy plates are all semi-circular aluminum alloy plates, and the three aluminum alloy plates include a first aluminum alloy plate 1, a second aluminum alloy plate 2, and a third aluminum alloy plate 3.

[0023] Specifically, the inner diameter of the first layer aluminum alloy plate 1 is 5mm larger than that of the rolling roller to ensure that the rolling roller is not interfered with by the structure during rotation. The first layer aluminum alloy plate 1 is 1720mm long and 410mm wide; the second layer aluminum alloy plate 2 is 1752mm long and 474mm wide; and the third layer aluminum alloy plate 3 is 1770mm long and 516mm wide.

[0024] Specifically, all three aluminum alloy plates are semi-circular, with the curvature of the plate matching the outer diameter of the rolling roller, thereby increasing the contact area and reducing heat transfer loss.

[0025] In other preferred embodiments, there are three ceramic heating rods 4, which are welded and fixed to the second layer of aluminum alloy plate 2 respectively. The conversion of electrical energy into heat energy is realized through the electrical control box, and the heating temperature range is 130-160℃.

[0026] Specifically, three ceramic heating rods 4 are welded to the second aluminum alloy plate 2 at equal intervals to ensure a uniform heat field distribution on the surface of the second aluminum alloy plate 2 and to form a stable heat conduction interface. The electrical control box adjusts the current intensity input to the ceramic heating rods 4 based on the feedback signal from the temperature sensing probe to maintain their operating temperature within the range of 130-160℃.

[0027] In other preferred embodiments, insulation cotton is sandwiched between the second aluminum alloy plate 2 and the third aluminum alloy plate 3, and the cooling fan 5 is installed on the first aluminum alloy plate 1 to control the heat dissipation rate of the heating device.

[0028] Specifically, insulation cotton is sandwiched between the second aluminum alloy plate 2 and the third aluminum alloy plate 3, forming a barrier layer against the heat generated by the ceramic heating rod 4. This slows down the rate at which heat is conducted through the aluminum alloy plate to the external structure, maintaining a stable surface temperature of the second aluminum alloy plate 2. The cooling fan 5 draws in external air through a rectangular hole (60mm long, 30mm wide). The airflow through the rectangular hole is limited by its cross-sectional size, resulting in a specific flow velocity. By adjusting the operating power of the cooling fan 5, the heat dissipation intensity can be changed, thereby precisely controlling the degree of heat accumulation inside the aluminum alloy plate and preventing material deformation or equipment malfunction due to excessive temperature.

[0029] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A heating device for PP sheets and rolling mills, characterized in that, The heating device includes three layers of aluminum alloy plates, a ceramic heating rod, a cooling fan, a temperature sensing probe, and an electrical control box. The three layers of aluminum alloy plates are fixedly connected by bolts. The ceramic heating rod, the cooling fan, and the temperature sensing probe are all mounted on the aluminum alloy plates. The ceramic heating rod, the cooling fan, and the temperature sensing probe are all electrically connected to the electrical control box.

2. The heating device for PP sheets and rolling rollers according to claim 1, characterized in that, The three-layer aluminum alloy plate is a semi-circular aluminum alloy plate, and the three-layer aluminum alloy plate includes a first layer aluminum alloy plate, a second layer aluminum alloy plate and a third layer aluminum alloy plate.

3. A heating device for PP sheets and rolling mills according to claim 2, characterized in that, The ceramic heating rod consists of three rods, which are welded and fixed to the second layer of aluminum alloy plate. The conversion of electrical energy into heat energy is achieved through an electrical control box, and the heating temperature range is 130-160℃.

4. A heating device for PP sheets and rolling mills according to claim 2, characterized in that, Insulation cotton is sandwiched between the second and third aluminum alloy plates, and the cooling fan is installed on the first aluminum alloy plate to control the heat dissipation rate of the heating device.

5. A heating device for PP sheets and rolling rollers according to claim 2, characterized in that, The inner diameter of the first layer of aluminum alloy plate is 5mm larger than that of the rolling roller.

6. A heating device for PP sheets and rolling rollers according to claim 2, characterized in that, The first layer of aluminum alloy plate has a length of 1720mm and a width of 410mm; the second layer of aluminum alloy plate has a length of 1752mm and a width of 474mm; and the third layer of aluminum alloy plate has a length of 1770mm and a width of 516mm.

7. A heating device for PP sheets and rolling mills according to claim 1, characterized in that, The heating device is provided with a roller shaft hole for connecting to the roller.

8. A heating device for PP sheets and rolling mills according to claim 1, characterized in that, The ceramic heating rod has a diameter of 30 mm.

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