Polyurethane glue roller

Abstract

The utility model discloses a polyurethane glue roller, including roll core and rubber bush, the rubber bush lateral wall fixedly connected with polyurethane glue layer, the lateral wall fixedly connected with the seal ring of roll core, the rear side of seal ring is equipped with a plurality of recesses along the circumference, the front end of rubber bush is equipped with with a plurality of connecting blocks of a plurality of recesses one -to -one insertion along the circumference, the lateral wall of recess is equipped with the sliding slot, the sliding connection of sliding slot has the abutting block, the connecting block is equipped with inclined plane no.

Description

Technical Field

[0001] This utility model relates to the field of polyurethane roller technology, and specifically to a polyurethane roller. Background Technology

[0002] Polyurethane rollers are parts and equipment used in printing. They have sufficient surface viscosity to ensure good ink transfer and ink adhesion during the printing process, and their good ink affinity ensures high-quality printing.

[0003] As prior art, Chinese patent CN218171788U proposes a polyurethane roller with good sealing performance, including a roller core and a rubber sleeve. A sealing ring is fixedly connected to the side wall of the roller core, and a groove is formed on the side wall of the sealing ring. A sealing plate is slidably connected to the inner wall of the groove, and a first airbag is fixedly connected to the inner wall of the groove. An annular groove is formed on the side wall of the roller core, and a second airbag is fixedly connected to the inner wall of the annular groove. The first airbag is connected to the second airbag through an air supply pipe.

[0004] However, this technical solution still has the following problems in use: the airbag reliability is poor; the first and second airbags rely on air pressure changes to achieve sealing, and after long-term use, they may age, leak, or rupture, leading to seal failure; the structure is relatively complex, requiring the simultaneous operation of multiple components such as the locking rod, threaded rod, and spring to fix the rubber sleeve, making the installation and disassembly process cumbersome and increasing maintenance costs; the locking rod and the locking slot require precise alignment, and improper operation can easily lead to component wear or misalignment; the spring is prone to fatigue after long-term use, resulting in a decrease in rebound force and affecting the smoothness of disassembly. Therefore, there is still room for improvement. Summary of the Invention

[0005] The purpose of this invention is to provide a polyurethane roller to solve the problems mentioned in the background section.

[0006] To solve the above technical problems, this utility model adopts the following technical solution: a polyurethane roller, including a roller core and a rubber sleeve, wherein a polyurethane adhesive layer is fixedly connected to the side wall of the rubber sleeve, a sealing ring is fixedly connected to the side wall of the roller core, a plurality of grooves are provided circumferentially on the rear side of the sealing ring, a plurality of connecting blocks are provided circumferentially on the front end of the rubber sleeve, which are inserted into the plurality of grooves one by one, a sliding groove is provided on the side wall of the groove, a pressing block is slidably connected in the sliding groove, the connecting block is provided with a first inclined surface, and the pressing block is provided with a second inclined surface that can abut against the first inclined surface; it also includes an adjustment structure for adjusting the pressing block to move away from or closer to the connecting block, a first sealing strip is provided on the rear inner wall of the rubber sleeve, and a second sealing strip is provided on the rear outer wall of the roller core that can seal against the first sealing strip.

[0007] Using the above technical solution, during installation, the rubber sleeve is placed on the roller core, and the connecting block at the front end of the rubber sleeve is inserted into the groove of the sealing ring. Then, the adjusting structure controls the pressure block to move towards the connecting block. When the first inclined plane and the second inclined plane abut and press together, the connecting block is subjected to a forward thrust, allowing the rubber sleeve to fit tightly against the sealing ring, thus preventing dust from entering between the sealing ring and the rubber sleeve. Both the first sealing strip and the second sealing strip are elastic. At this time, the first sealing strip and the second sealing strip are aligned and fit tightly against each other through elasticity, thus preventing dust from entering between the sealing ring and the roller core.

[0008] As a further optimization of this utility model, the adjustment structure includes a screw hole that radially penetrates the side wall of the sealing ring and communicates with the groove, and a screw rod that is threaded into the screw hole. The inner end of the screw rod is rotatably connected to the pressing block, and the outer end extends out of the sliding groove.

[0009] Using the above technical solution, the rotating screw moves in conjunction with the screw hole thread, thereby causing the pressure block to slide closer to or away from the connecting block in the groove.

[0010] As a further optimization of this utility model, the end faces of both the first sealing strip and the second sealing strip are set to be toothed and interlocked with each other.

[0011] Using the above technical solution, when the sealing rubber sleeve is subjected to a forward thrust, the toothed surfaces of sealing strip one and sealing strip two generate a certain static friction force between them, which can make them fit more tightly.

[0012] As a further optimization of this utility model, the inner wall of the groove is provided with a magnet, and the connecting block is provided with a magnet that can be attracted to the magnet.

[0013] Using the above technical solution, when the connecting block is inserted into the groove, magnet one and magnet two are magnetically attracted, allowing them to be precisely aligned, making the operation faster.

[0014] As a further optimization of this utility model, a knob is provided at the outer end of the screw.

[0015] The beneficial effects of this utility model are as follows: by adjusting the structure, the pressing block moves toward the connecting block. When the first inclined surface and the second inclined surface abut and press together, the connecting block is subjected to a forward thrust, which allows the rubber sleeve to fit tightly with the sealing ring, thereby preventing dust from entering between the sealing ring and the rubber sleeve.

[0016] Both sealing strip one and sealing strip two are elastic. At this time, sealing strip one and sealing strip two are aligned and fit together tightly through elasticity, thereby preventing dust from entering between the sealing ring and the roller core. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 for Figure 1 Enlarged view on the left side of the middle section;

[0019] Figure 3 for Figure 1 The enlarged diagram on the right side of the image.

[0020] The labels in the diagram mean: 11. Roller core; 12. Sealing ring; 13. Rubber sleeve; 14. Polyurethane adhesive layer; 2. Connecting block; 21. Inclined surface one; 3. Slide groove; 31. Pressing block; 311. Inclined surface two; 4. Screw hole; 41. Screw; 411. Knob; 51. Magnet one; 52. Magnet two; 61. Sealing strip one; 62. Sealing strip two. Detailed Implementation

[0021] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0022] See appendix Figure 1-3 The present embodiment of the present utility model further includes: a polyurethane roller, comprising a roller core 11 and a rubber sleeve 13, wherein a polyurethane adhesive layer 14 is fixedly connected to the side wall of the rubber sleeve 13, and a sealing ring 12 is fixedly connected to the side wall of the roller core 11.

[0023] The rear side of the sealing ring 12 is provided with several grooves along the circumference. The front end of the rubber sleeve 13 is provided with several connecting blocks 2 that are inserted into the grooves one by one. The side wall of the groove is provided with a sliding groove 3. A pressing block 31 is slidably connected in the sliding groove 3. The connecting block 2 is provided with a first inclined surface 21. The pressing block 31 is provided with a second inclined surface 311 that can abut against the first inclined surface 21.

[0024] It also includes an adjustment structure for adjusting the pressure block 31 to move away from or closer to the connecting block 2. Specifically, the adjustment structure includes a screw hole 4 that radially penetrates the side wall of the sealing ring 12 and communicates with the groove, and a screw 41 that is threaded into the screw hole 4. The inner end of the screw 41 is rotatably connected to the pressure block 31, and the outer end extends out of the slide groove 3. Furthermore, the outer end of the screw 41 is provided with a knob 411.

[0025] Furthermore, the inner rear wall of the rubber sleeve 13 is provided with a sealing strip 61, and the outer rear wall of the roller core 11 is provided with a sealing strip 62 that can seal with the sealing strip 61.

[0026] Furthermore, the inner wall of the groove is provided with a magnet 51, and the connecting block 2 is provided with a magnet 52 that can be attracted to the magnet 51.

[0027] The principle of this utility model is as follows: During installation, the rubber sleeve 13 is put on the roller core 11, and the connecting block 2 at the front end of the rubber sleeve 13 is inserted into the groove of the sealing ring 12. At the same time, the magnet 1 51 and the magnet 2 52 are attracted by magnetism, so that the two can be precisely aligned, making the operation faster.

[0028] Next, the screw 41 is rotated by the knob 411. The screw 41 moves in the threaded engagement with the screw hole 4, thereby driving the pressure block 31 to slide closer to or away from the connecting block 2 in the slide groove 3. When the inclined surface 21 and the inclined surface 311 abut and press together, the connecting block 2 is subjected to a forward thrust, which allows the rubber sleeve 13 to fit tightly with the sealing ring 12, thereby preventing dust from entering between the sealing ring 12 and the rubber sleeve 13. Both the sealing strip 61 and the sealing strip 62 are elastic. At this time, the sealing strip 61 and the sealing strip 62 are aligned and fit tightly with each other through elasticity, thereby preventing dust from entering between the sealing ring 12 and the roller core 11. While the sealing rubber sleeve 13 is subjected to a forward thrust, the toothed surfaces of the sealing strip 61 and the sealing strip 62 generate a certain static friction force, which can make them fit even tighter.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. A polyurethane roller, comprising a roller core (11) and a rubber sleeve (13), wherein a polyurethane adhesive layer (14) is fixedly connected to the side wall of the rubber sleeve (13), and a sealing ring (12) is fixedly connected to the side wall of the roller core (11), characterized in that, The sealing ring (12) has several grooves circumferentially arranged on its rear side. The front end of the rubber sleeve (13) has several connecting blocks (2) circumferentially arranged to be inserted into the grooves one by one. The side wall of the groove has a sliding groove (3). A pressing block (31) is slidably connected in the sliding groove (3). The connecting block (2) has a first inclined surface (21). The pressing block (31) has a second inclined surface (311) that can abut against the first inclined surface (21). The sealing ring (12) also includes an adjustment structure for adjusting the pressing block (31) to move away from or closer to the connecting block (2). The inner rear wall of the rubber sleeve (13) has a first sealing strip (61). The outer rear wall of the roller core (11) has a second sealing strip (62) that can seal against the first sealing strip (61).

2. The polyurethane roller according to claim 1, characterized in that, The adjustment structure includes a screw hole (4) that radially penetrates the side wall of the sealing ring (12) and communicates with the groove, and a screw (41) that is threaded into the screw hole (4). The inner end of the screw (41) is rotatably connected to the pressing block (31), and the outer end extends out of the slide groove (3).

3. A polyurethane roller according to claim 1, characterized in that, The end faces of the first sealing strip (61) and the second sealing strip (62) are both toothed and interlocked.

4. A polyurethane roller according to claim 1, characterized in that, The inner wall of the groove is provided with a magnet (51), and the connecting block (2) is provided with a magnet (52) that can be attracted to the magnet (51).

5. A polyurethane roller according to claim 2, characterized in that, The outer end of the screw (41) is provided with a knob (411).

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