Printing rubber roller preheating device

Abstract

The utility model provides a printing rubber covered roller preheating device which comprises a hollow rubber covered roller, a heating resistor is installed in the hollow rubber covered roller, end rings are arranged at the two ends of the hollow rubber covered roller, the two ends of the heating resistor are connected with two conductive discs in an inserted mode respectively, and the two ends of the hollow rubber covered roller are each provided with two symmetrically-arranged inserting grooves. Inserting blocks are inserted into the inserting grooves, threaded holes are formed in one side face of each inserting block, two penetrating holes matched with the threaded holes are formed in one side face of each end ring, screws are inserted into the penetrating holes, and one ends of the screws extend into the hollow rubber roller and are connected into the threaded holes in a threaded mode. The rubber covered roller has the advantages that the whole rubber covered roller does not need to be replaced when threads of the threaded holes matched with the screws are damaged, and replacement cost of parts is reduced.

Description

Technical Field

[0001] The utility model relates to a preheating device for a printing rubber roller, belonging to the technical field of printing. Background Art

[0002] When the gravure printing production line of paper runs in winter, at the start, due to the low temperature, the rubber roller is hard, resulting in problems such as the rubber roller not being pressed firmly and paper breakage. Therefore, it is necessary to preheat the rubber roller. Using a heating resistance channel to generate heat to heat the rubber roller is one of the common ways to preheat the rubber roller. Among them, the heating resistance is installed inside the rubber roller. To facilitate the disassembly and assembly of the heating resistance, end rings need to be installed at both ends of the rubber roller using screws. Threaded holes matching the screws need to be opened on the rubber roller. During the process of disassembling and assembling the screws, the threads of the threaded holes machined on the rubber roller may be damaged due to excessive torque or other reasons, resulting in the end ring not being able to be assembled with the rubber roller smoothly, and the need to replace the rubber roller, leading to a high cost of replacing parts. Content of the Utility Model

[0003] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a preheating device for a printing rubber roller to solve the problems raised in the above background art. When the threads of the threaded holes matching the screws are damaged in the utility model, it is not necessary to replace the entire rubber roller, reducing the cost of replacing parts.

[0004] To achieve the above purpose, the utility model is realized through the following technical solutions: A preheating device for a printing rubber roller includes a hollow rubber roller. A heating resistance is installed inside the hollow rubber roller. End rings are provided at both ends of the hollow rubber roller. A conductive disk is installed inside the end ring. The two ends of the heating resistance are respectively inserted into the two conductive disks. Two symmetrically arranged slots are opened at both ends of the hollow rubber roller. An insert block is inserted into the slot. A threaded hole is opened on one side of the insert block. Two through holes matching the threaded hole are opened on one side of the end ring. A screw is inserted into the through hole. One end of the screw extends into the hollow rubber roller and is threadedly connected to the threaded hole.

[0005] Furthermore, an insulating ring is installed between the conductive disk and the end ring. The insulating ring is fixedly connected to the conductive disk and the end ring. A blind hole is formed by the depression on the side of the conductive disk facing away from the hollow rubber roller. An insulating sleeve is installed in the blind hole. A support shaft is fixedly connected inside the insulating sleeve. A bearing is sleeved at the end of the support shaft away from the conductive disk. The bearing is fixed in a round hole. The round hole is opened on one side of the support.

[0006] Furthermore, the thickness of the insert block is less than the width of the slot. Two support plates are fixedly connected to the side of the insert block close to the screw. The ends of the support plates away from the insert block are in contact with the inner wall of the slot. The two support plates are symmetrically arranged with respect to the threaded hole.

[0007] Further, a first arc surface is machined on one side of the insertion block located outside the slot, a second arc surface is machined on one side of the support plate located outside the slot, and the radian of the first arc surface and the radian of the second arc surface are the same as the radian of the outer surface of the hollow rubber roller.

[0008] Further, shielding rings are sleeved on both ends of the hollow rubber roller. Both ends of the shielding ring are larger than the width of the slot. Threaded holes are formed on the outer surface of the shielding ring and are arranged along the advancing direction of the shielding ring. Positioning bolts for restricting the relative position between the shielding ring and the hollow rubber roller are threadedly connected in the threaded holes.

[0009] Further, the support plate and the insertion block are of an integrally formed structure. The support plate and the insertion block are arranged perpendicular to each other, and the length of the support plate is equal to the width of the slot between the thicknesses of the insertion blocks.

[0010] Advantages of the utility model:

[0011] 1. Threaded holes matching with screws are machined on the insertion blocks, and the insertion blocks are inserted into the slots on the hollow rubber roller to complete the assembly of the insertion blocks and the hollow rubber roller. Then the screws pass through the through holes on the end rings and are screwed into the threaded holes to complete the fixation of the relative positions of the end rings, the insertion blocks and the hollow rubber roller. When the threads in the threaded holes are damaged due to excessive torque or other applications, only the insertion blocks need to be replaced, without replacing the whole hollow rubber roller, reducing the cost of replacing parts.

[0012] 2. When the insertion blocks are inserted into the slots, the two support plates on the insertion blocks are in contact with the inner wall of the slots. Then, under the action of the two support plates, there is a gap between the insertion block and one inner wall of the slot. When the head of the screw becomes weak due to oxidation in a high-temperature environment for a long time and cannot be clamped by a wrench, the rod part of the screw is cut off by using the space formed by the two support plates and the insertion block to complete the separation of the screw and the insertion block, facilitating the removal of the end ring to repair or replace the heating resistor without damaging the end ring and the hollow rubber roller.

[0013] 3. After the insertion blocks and the hollow rubber roller are assembled, shielding rings are sleeved on both ends of the hollow rubber roller. The slots are shielded by the shielding rings, so that the heating resistor is in a closed space, preventing the heating resistor from oxidizing too fast during the heating process due to excessive oxygen in the hollow rubber roller, and playing a role in protecting the heating resistor. Description of the drawings

[0014] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, purposes and advantages of the utility model will become more obvious:

[0015] Figure 1 It is a schematic structural diagram of a printing rubber roller preheating device of the utility model;

[0016] Figure 2Schematic diagram of the assembly of the conductive disk, heating resistor and end ring in a preheating device for a printing rubber roller of the present utility model;

[0017] Figure 3 Schematic diagram of the assembly of the support shaft, conductive disk and end ring in a preheating device for a printing rubber roller of the present utility model;

[0018] Figure 4 Schematic diagram of the assembly of the end ring and the hollow rubber roller in a preheating device for a printing rubber roller of the present utility model;

[0019] Figure 5 Three-dimensional view of the hollow rubber roller in a preheating device for a printing rubber roller of the present utility model;

[0020] Figure 6 Schematic diagram of the assembly of the support plate and the insertion block in a preheating device for a printing rubber roller of the present utility model;

[0021] Figure 7 Three-dimensional view of the shielding ring in a preheating device for a printing rubber roller of the present utility model;

[0022] Figure 8 Three-dimensional view of the support in a preheating device for a printing rubber roller of the present utility model;

[0023] In the figure: 1 - hollow rubber roller, 2 - positioning bolt, 3 - shielding ring, 4 - support, 5 - bearing, 6 - support shaft, 7 - end ring, 8 - screw, 9 - heating resistor, 10 - perforation, 11 - insulating sleeve, 12 - conductive disk, 13 - insulating ring, 14 - slot, 15 - insertion block, 16 - threaded hole, 17 - support plate, 18 - first arc surface, 19 - second arc surface, 20 - screw hole. Detailed implementation manners

[0024] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with the detailed implementation manners.

[0025] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 8, the present utility model provides a technical solution: a printing rubber roller preheating device, which includes a hollow rubber roller 1. A heating resistor 9 is installed inside the hollow rubber roller 1. End rings 7 are provided at both ends of the hollow rubber roller 1. A conductive disk 12 is installed inside the end ring 7. Two ends of the heating resistor 9 are respectively inserted into the two conductive disks 12. An insulating ring 13 is installed between the conductive disk 12 and the end ring 7. The insulating ring 13 is fixedly connected to the conductive disk 12 and the end ring 7. A blind hole is formed by the depression on the side of the conductive disk 12 facing away from the hollow rubber roller 1. An insulating sleeve 11 is installed inside the blind hole. A support shaft 6 is fixedly connected inside the insulating sleeve 11. A bearing 5 is sleeved on the end of the support shaft 6 away from the conductive disk 12. The bearing 5 is fixed inside a round opening. The round opening is formed on one side surface of a support 4. The bearing 5 realizes the rotational connection between the support shaft 6 and the support 4. When a conductive head electrically connected to an external power source contacts the conductive disk 12, when the hollow rubber roller 1 rotates driven by an external device, relative sliding occurs between the conductive head and the conductive disk 12, which is beneficial to keep the heating resistor 9 always electrically connected to the external power source. When the heating resistor 9 is powered on, heat is generated, thereby preheating the hollow rubber roller 1.

[0026] Refer to Figures 1-6 , two symmetrically arranged slots 14 are opened at both ends of the hollow rubber roller 1. Plug blocks 15 are inserted into the slots 14. A threaded hole 16 is opened on one side surface of the plug block 15. Two through holes 10 matching the threaded hole 16 are opened on one side surface of the end ring 7. Screws 8 are inserted into the through holes 10. One end of the screw 8 extends into the hollow rubber roller 1 and is threadedly connected to the threaded hole 16. The threaded hole 16 matching the screw 8 is processed on the plug block 15, so that the plug block 15 is inserted into the slot 14 on the hollow rubber roller 1 to complete the assembly of the plug block 15 and the hollow rubber roller 1. Then the screw 8 is screwed into the threaded hole 16 after passing through the through hole 10 on the end ring 7 to complete the fixation of the relative positions of the end ring 7, the plug block 15 and the hollow rubber roller 1. When the thread in the threaded hole 16 is damaged due to excessive torque or other reasons during use, only the plug block 15 needs to be replaced, without replacing the entire hollow rubber roller 1, reducing the cost of replacing parts.

[0027] Refer to Figures 4-6, the thickness of the inserted block 15 is less than the width of the slot 14. Two support plates 17 are fixedly connected to the side of the inserted block 15 close to the screw 8. The support plates 17 and the inserted block 15 are of an integrally formed structure, and the support plates 17 and the inserted block 15 are arranged perpendicular to each other. The end of the support plate 17 away from the inserted block 15 is in contact with the inner wall of the slot 14. The two support plates 17 are symmetrically arranged with respect to the threaded hole 16. The length of the support plate 17 is equal to the width of the slot 14 between the thickness of the inserted block 15. When the inserted block 15 is inserted into the slot 14, the two support plates 17 on the inserted block 15 are in contact with the inner wall of the slot 14. Then, under the action of the two support plates 17, there is a gap between the inserted block 15 and the inner wall of the slot 14. When the head of the screw 8 becomes weakened due to oxidation in a high-temperature environment for a long time and cannot engage the wrench, the rod portion of the screw 8 is cut off by the space formed by the two support plates 17 and the inserted block 15, completing the separation of the screw 8 from the inserted block 15, which facilitates the removal of the end ring 7 without damaging the end ring 7 and the hollow rubber roller 1 to repair or replace the heating resistor 9.

[0028] Refer to Figure 1 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , a first arc surface 18 is machined on the surface of the inserted block 15 outside the slot 14, and a second arc surface 19 is machined on the surface of the support plate 17 outside the slot 14. The radian of the first arc surface 18 and the radian of the second arc surface 19 are the same as the radian of the outer surface of the hollow rubber roller 1. The design of the first arc surface 18 and the second arc surface 19 facilitates the movement of the shielding ring 3 to the slot 14. Shielding rings 3 are sleeved on both ends of the hollow rubber roller 1. The two ends of the shielding ring 3 are larger than the width of the slot 14. A threaded hole 20 is opened on the outer surface of the shielding ring 3. The threaded hole 20 is arranged along the advancing direction of the shielding ring 3. A positioning bolt 2 for restricting the relative position between the shielding ring 3 and the hollow rubber roller 1 is threadedly connected in the threaded hole 20. After the inserted block 15 and the hollow rubber roller 1 are assembled, shielding rings 3 are sleeved on both ends of the hollow rubber roller 1. The slot 14 is shielded by the shielding ring 3, and then the relative position between the shielding ring 3 and the hollow rubber roller 1 is restricted by the positioning bolt 2, so that the heating resistor 9 is in a closed space, preventing the heating resistor 9 from oxidizing too quickly during the heating process due to excessive oxygen in the hollow rubber roller 1, and playing a role in protecting the heating resistor 9.

[0029] Although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A printing rubber roller preheating device, comprising a hollow rubber roller (1), characterized in that: A heating resistor (9) is installed in the hollow rubber roller (1). Both ends of the hollow rubber roller (1) are provided with end rings (7). A conductive disk (12) is installed in the end rings (7). The two ends of the heating resistor (9) are respectively plugged into the two conductive disks (12). Both ends of the hollow rubber roller (1) are provided with two symmetrically arranged slots (14). An insert block (15) is inserted in the slot (14). A threaded hole (16) is provided on one side of the insert block (15). Two through holes (10) matching the threaded holes (16) are provided on one side of the end ring (7). A screw (8) is inserted in the through hole (10). One end of the screw (8) extends into the hollow rubber roller (1) and is threadedly connected in the threaded hole (16).

2. A printing rubber roller preheating device according to claim 1, characterized in that: An insulating ring (13) is installed between the conductive disk (12) and the end ring (7), and the insulating ring (13) is connected and fixed to the conductive disk (12) and the end ring (7). The side of the conductive disk (12) facing away from the hollow rubber roller (1) is recessed to form a blind hole, and an insulating sleeve (11) is installed in the blind hole. A support shaft (6) is connected and fixed in the insulating sleeve (11). A bearing (5) is sleeved on the end of the support shaft (6) away from the conductive disk (12), and the bearing (5) is fixed in a circular opening, and the circular opening is opened on a side surface of the support (4).

3. A printing rubber roller preheating device according to claim 1, characterized in that: The thickness of the insert block (15) is smaller than the width of the slot (14); one side of the insert block (15) close to the screw (8) is connected and fixed with two support plates (17); one end of the support plate (17) away from the insert block (15) contacts the inner wall of the slot (14); and the two support plates (17) are symmetrically arranged about the threaded hole (16).

4. A printing rubber roller preheating device according to claim 3, characterized in that: A first arcuate surface (18) is processed on one side of the insert block (15) located outside the slot (14), and a second arcuate surface (19) is processed on one side of the support plate (17) located outside the slot (14). The curvature of the first arcuate surface (18) and the curvature of the second arcuate surface (19) are the same as the curvature of the outer surface of the hollow rubber roller (1).

5. A printing rubber roller preheating device according to claim 4, characterized in that: Both ends of the hollow rubber roller (1) are sleeved with shielding rings (3), the two ends of the shielding ring (3) are larger than the width of the slot (14), the outer surface of the shielding ring (3) is provided with screw holes (20), the screw holes (20) are arranged along the moving direction of the shielding ring (3), and the inner threads of the screw holes (20) are connected with positioning bolts (2) for limiting the relative position of the shielding ring (3) and the hollow rubber roller (1).

6. A printing rubber roller preheating device according to claim 3, characterized in that: The support plate (17) and the insert block (15) are an integrally formed structure; the support plate (17) and the insert block (15) are arranged perpendicular to each other; the length of the support plate (17) and the thickness of the insert block (15) are equal to the width of the slot (14).

Images