Composite roll heating device

Abstract

The utility model relates to the technical field of film -coated iron production equipment, in order to solve the problem of low energy utilization rate of existing composite roller, disclose a kind of composite roller heating device, including rack, composite roller, arc closed shell and adjusting mechanism, the arc closed shell is located in the downside of composite roller, clearance is formed between the inner concave arc surface and roll surface, each is equipped with a piston in the cavity of both ends in shell, form sealed sliding pair, adjusting mechanism includes the piston rod and box connected with piston, the through-hole for heat conducting medium circulation is equipped in the inside of piston rod, the effective heating zone width formed between two pistons can be changed by driving piston sliding, make its accurate matching different width of the metal substrate to be processed, to realize on-demand local heating, the utility model effectively solves the problem of serious energy waste when wide composite roller heats narrow plate in prior art, significantly improves the thermal efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of coated iron production equipment, specifically to a composite roller heating device. Background Technology

[0002] Coated iron is a layered material made by laminating a plastic film to a metal substrate (such as tin-plated iron or chrome-plated iron) through hot pressing. It is widely used in packaging for food cans, chemical cans, and other products. Its core production process lies in the lamination step, which is typically completed by a composite roller system. This system generally includes a heated steel roller and a matching rubber roller. The metal substrate and the plastic film are pressed and heated at the gap formed between the heated steel roller and the rubber roller, thus achieving a strong lamination.

[0003] Currently, the composite rollers commonly used in the industry are integral heating rollers. These rollers have internal heat-conducting oil channels or electric heating elements, requiring uniform heating of the entire roller body during operation to ensure a stable and consistent working temperature on the roller surface. This structure is stable and reliable for the production of products with fixed widths. However, in actual production, to meet diverse customer needs, manufacturers need to frequently change the width of the metal substrates to be coated. When a narrower metal substrate is used with a wider composite roller, the composite roller only participates in the lamination process in the central area corresponding to the width of the metal substrate. Its sides (the areas outside the substrate width) are also heated to the working temperature but do not come into contact with any material or participate in any heat transfer process. This results in a significant amount of heat being directly lost to the surrounding environment through radiation and convection, causing serious energy waste.

[0004] Therefore, those skilled in the art urgently need a new composite roller technology solution that can solve the energy waste problem during the alternating production of wide and narrow plates, and significantly improve energy utilization efficiency while ensuring film coating quality. Utility Model Content

[0005] To address the aforementioned technical deficiencies, this invention provides a composite roller heating device that enables the heating area of ​​the composite roller to be matched with metal substrates of different widths.

[0006] This utility model discloses a composite roller heating device, including a frame, a composite roller, an arc-shaped sealed housing, and an adjustment mechanism. The composite roller is rotatably mounted on the frame. The arc-shaped sealed housing faces the lower side of the composite roller with its concave arc surface and is fixed to the frame by a mounting bracket. A gap is left between the arc-shaped sealed housing and the roller surface of the composite roller. The adjustment mechanism includes a piston, a piston rod, and a housing. Each end of the arc-shaped sealed housing has a piston in its internal cavity. The shape of the piston matches the shape of the inner cavity of the housing to form a sealing sliding pair. Several first through holes are evenly opened on the end faces of the two ends of the arc-shaped sealed housing. A second through hole is provided on the piston corresponding to the position of the first through hole. One end of the piston rod passes through the first through hole and is sealed and fixed in the second through hole. A third through hole is provided inside the piston rod along its central axis. The other end of the piston rod passes through a fourth through hole provided on the frame and is provided at the end of the housing. A material pipe is provided on the housing.

[0007] The principle of the above scheme is that the device sets up an arc-shaped sealed shell under the composite roller, which exchanges heat with the roller surface. By adjusting the mechanism, the pistons in the two cavities at both ends of the shell can be moved towards or away from each other, thereby changing the width of the effective heating zone enclosed between the two pistons. Subsequently, the heat-conducting medium circulates in the sealed cavity of this specific width, accurately transferring heat to the corresponding area on the composite roller that is in contact with the substrate, while stopping the heating of the roller surface area outside the substrate width. This fundamentally avoids the ineffective heat loss when a wide roller heats a narrow plate, achieving the purpose of heating on demand and saving energy.

[0008] To enhance energy efficiency, the outer side of the curved, sealed shell is covered with a heat insulation layer.

[0009] To effectively fix the piston after adjusting its position, the piston rod is provided with external threads, and nuts are provided on the piston rods on both sides of the fourth through hole. After the piston position is adjusted, tighten the nuts on the piston rods on both sides of the fourth through hole to fix the piston rod.

[0010] The composite roller heating device obtained by this utility model has the following advantages: it achieves precise matching between the heating area of ​​the composite roller and metal substrates of different widths by adjusting the width of the effective heating zone inside the arc-shaped sealed shell through an adjustable piston, thus achieving "on-demand heating" and fundamentally eliminating the ineffective heat loss in the non-working areas on both sides when a wide roller processes a narrow plate. On this basis, by covering the outside of the arc-shaped sealed shell with a heat insulation layer, the heat loss from the heating chamber to the outside is further blocked. With these two measures combined, the thermal efficiency of the entire heating system is significantly improved, energy waste is minimized, and it is also conducive to maintaining the stability of the roller surface working temperature and improving the uniformity of the coating quality. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top view of the present invention; Figure 3 This utility model Figure 2 Sectional view of AA. Detailed Implementation

[0012] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0013] Example 1: like Figure 1 , 2 As shown in Figure 3, this utility model discloses a composite roller heating device, including a frame 1, a composite roller 9, an arc-shaped sealed housing 8, and an adjustment mechanism. The composite roller 9 is rotatably mounted on the frame 1. The arc-shaped sealed housing 8, with its concave arc-shaped surface facing the lower side of the composite roller 9, is fixed to the frame 1 by a mounting bracket 6. A gap is left between the arc-shaped sealed housing 8 and the roller surface of the composite roller 9. The outer side of the arc-shaped sealed housing 8 is covered with a heat insulation layer 7. The adjustment mechanism includes a piston 10, a piston rod 3, and a housing 4. A piston 10 is provided in the internal cavity at each end of the arc-shaped sealed housing 8. The shape of 0 matches the shape of the inner cavity of the housing to form a sealing sliding pair. Several first through holes are evenly opened on the two end faces of the arc-shaped sealed housing 8. The piston 10 is provided with a second through hole corresponding to the position of the first through hole. One end of the piston rod 3 passes through the first through hole and is sealed and fixed in the second through hole. A third through hole is provided inside the piston rod 3 along its central axis. The other end of the piston rod 3 passes through the fourth through hole provided on the frame 1 and is provided with a box 4 at the end. A material pipe 5 is provided on the box 4. The piston rod 3 is provided with external threads. Nuts 2 are provided on the piston rod 3 on both sides of the fourth through hole.

[0014] The principle of the above scheme is that the device has an arc-shaped sealed shell 8 set below the composite roller 9, which exchanges heat with the roller surface; by adjusting the mechanism, the pistons 10 in the two cavities at both ends of the shell 8 can move synchronously towards or away from each other, thereby changing the width of the effective heating zone enclosed between the two pistons 10; after the position of the pistons 10 is adjusted, the nuts 2 on the piston rods 3 on both sides of the fourth through hole can be tightened to fix the piston rods 3. Subsequently, the high-temperature heat transfer medium enters the box 4 through the material pipe 5 on one side of the box 4, and is continuously injected between the two pistons 10 through the third through hole inside the piston rod 3. Inside the sealed heating chamber, heat energy is efficiently transferred to the corresponding roller surface area of ​​the composite roller 9, and finally flows out from the piston rod on the other side and from the material pipe of the box on that side. After being heated by the circulating heating equipment, the heat transfer medium re-enters from the material pipe 5 on the other side, so that the heat transfer medium circulates in the sealed chamber of a specific width, accurately transferring heat to the corresponding area of ​​the composite roller 9 that contacts the substrate. Heating is stopped for the roller surface area outside the width of the substrate, thus fundamentally avoiding the ineffective heat loss when the wide roller heats the narrow plate, achieving the purpose of heating on demand and saving energy.

Claims

1. A composite roller heating device, characterized in that: The device includes a frame, a composite roller, an arc-shaped sealed housing, and an adjustment mechanism. The composite roller is rotatably mounted on the frame. The arc-shaped sealed housing, with its concave arc surface facing the lower side of the composite roller, is fixed to the frame by a mounting bracket. A gap is left between the arc-shaped sealed housing and the roller surface of the composite roller. The adjustment mechanism includes a piston, a piston rod, and a housing. Each end of the arc-shaped sealed housing has a piston in its internal cavity. The shape of the piston matches the shape of the inner cavity of the housing to form a sealing sliding pair. Several first through holes are evenly opened on the end faces of the arc-shaped sealed housing. A second through hole is provided on the piston corresponding to the position of the first through hole. One end of the piston rod passes through the first through hole and is sealed and fixed in the second through hole. A third through hole is provided inside the piston rod along its central axis. The other end of the piston rod passes through a fourth through hole provided on the frame and is provided at the end with a housing. A material pipe is provided on the housing.

2. The composite roller heating device according to claim 1, characterized in that: The outer side of the arc-shaped sealed shell is covered with a heat insulation layer.

3. A composite roller heating device according to claim 1 or 2, characterized in that: The piston rod is provided with external threads, and nuts are provided on the piston rod on both sides of the fourth through hole.

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