Anti-lock structure for roller shaft section of embossing machine

Abstract

The utility model discloses an anti-lock structure for a roller shaft section of an embossing machine, which is characterized in that a stepped central hole 2 is formed in the center of a roller 1 of the embossing machine, a rotating shaft 3 is assembled, and pressure bearings 4 are mounted at two ends of the rotating shaft 3. The pressure bearing is composed of a metal base layer 41 and a polymer outer layer 42, a plurality of rolling shafts 43 are evenly distributed on the circumference of the outer layer, and a radial gap of 0.5-1.5 mm is formed between a rotating shaft and a center hole, so that sliding friction is converted into rolling friction, thermal expansion and cold contraction are buffered, and locking is prevented. The spiral electric heating wire is arranged in the roller, the temperature is accurately controlled through the temperature control device, and the embossing quality is guaranteed. A nano ceramic coating, a rotating shaft nitriding hardened layer and a unique lubricating system on the surface of the rolling shaft greatly reduce abrasion and prolong the service life of equipment. 6-12 equal-angle internal thread mounting holes are formed in the rotating shaft, so that different embossing processes can be conveniently adapted. The utility model effectively solves the problem that the traditional shaft sleeve is easy to lock, obviously improves the running stability, embossing quality and equipment applicability of the embossing machine, and has great market application value.

Description

TECHNICAL FIELD

[0001] The utility model relates to embossing machine technical field, specifically point to a kind of embossing machine cylinder shaft section anti-lock structure. BACKGROUND

[0002] Embossing machine is widely used in packaging, printing, leather, plastic and other industries, for printing out decorative effect with specific pattern or texture on the surface of various materials. In the operation process of embossing machine, as a key component, the stable operation of its shaft section directly affects the embossing quality and the overall performance of the equipment.

[0003] In the existing embossing machine technology, the cylinder of many embossing machines needs to be heated to meet the needs of different materials and embossing processes. For example, in some plastic film embossing process, appropriate heating can make the plastic film more easily shaped and embossed, improving the clarity and quality of embossing. However, there are some defects in the design of traditional embossing machine cylinder. For example, in the case of common plate cylinder, the shaft head part on both sides of the cylinder originally adopts a shaft sleeve structure. When the cylinder works for a long time in a high-temperature environment, the shaft sleeve and the shaft are prone to fit too tightly due to the difference in thermal expansion coefficient, which may cause the shaft section to lock.

[0004] The locking of the shaft section not only makes the embossing machine unable to operate normally, interrupts the production process and affects the production efficiency, but also may cause serious damage to the equipment. Once locked, forced operation may cause shaft sleeve wear, shaft deformation or even breakage, resulting in high maintenance cost and long maintenance time. In addition, frequent equipment failure downtime will increase the production cost of enterprises and reduce the market competitiveness of products. Moreover, the traditional shaft sleeve structure performs poorly in heat conduction, which cannot effectively transfer the heat generated by the cylinder, affecting the consistency of embossing effect and possibly causing material scorching or embossing quality decline. In order to solve these problems, the industry has been seeking more effective solutions, and improving the structure of embossing machine cylinder shaft section has become a key direction. UTILITY MODEL CONTENTS

[0005] The utility model solves the above technical problems, provides a kind of embossing machine cylinder shaft section anti-lock structure, and the utility model aims at solving the problem that embossing machine cylinder shaft section is prone to lock in the working process, improves the working efficiency and reliability of embossing machine by the innovative design of cylinder shaft section structure.

[0006] To solve the above technical problems, the technical scheme provided by the utility model is as follows: 1. A kind of embossing machine cylinder shaft section anti-lock structure, including embossing machine cylinder, characterized by: the center of the embossing machine cylinder is provided with a stepped center hole, a rotating shaft is assembled in the center hole, and pressure bearings are arranged at both ends of the rotating shaft.

[0007] The pressure bearing comprises a metal base layer and a polymer outer layer, a plurality of rollers 43 are uniformly distributed in the circumferential direction of the outer layer, and a radial gap of 0.5-1.5 mm is formed between the rotating shaft and the central hole.

[0008] In addition, the anti-lock structure of the cylinder shaft section of the embossing machine according to the above-mentioned utility model can have the following additional technical features:

[0009] The cylinder of the embossing machine is internally embedded with spiral electric heating wires, the electric heating wires are connected with a temperature control device through wires, and the temperature control device is provided with a temperature sensor and a PID adjustment module.

[0010] Further, the rollers 43 are uniformly distributed along the circumference of the pressure bearing and are arranged horizontally, and each roller 43 is provided with a nanometer ceramic coating on the surface.

[0011] Further, 6-12 equiangular mounting holes are arranged on the rotating shaft, the mounting holes adopt an internal thread structure, and the hole depth is 1 / 3-1 / 2 of the diameter of the rotating shaft.

[0012] Further, a graphite lubricating layer is arranged between the base layer of the pressure bearing and the rotating shaft, an annular oil guide groove is arranged on the outer circumferential surface of the outer layer, and the oil guide groove is communicated with a lubricating system through a radial oil channel.

[0013] Further, the surface of the rotating shaft is subjected to nitriding treatment to form a hardened layer, the thickness of the hardened layer is 0.1-0.3 mm, and the surface hardness reaches HRC55-60.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] 1. By adopting the pressure bearing to replace the traditional shaft sleeve and uniquely designing the pressure bearing, including the combination of the metal base layer and the polymer outer layer, arranging the rollers and reasonably arranging the radial gap, the problem of shaft section locking caused by thermal expansion and friction is fundamentally solved, the running stability and reliability of the embossing machine are greatly improved, and the equipment downtime is reduced.

[0016] 2. The accurate temperature control system can ensure that the cylinder works at an appropriate temperature, the embossing process is more stable, the embossing effect is more clear and uniform, the problems of material burning or embossing quality decline caused by abnormal temperature are avoided, and the quality and market competitiveness of the product are improved.

[0017] 3. The nanometer ceramic coating on the surface of the roller, the nitriding hardened layer on the surface of the rotating shaft and the perfect lubricating system effectively reduce the wear between the components, prolong the service life of the pressure bearing, the rotating shaft and the entire embossing machine, and reduce the maintenance and replacement cost of the equipment.

[0018] 4. The mounting hole design on the shaft enables the embossing machine to conveniently install various auxiliary components, adapt to different embossing process requirements, and improve the versatility and flexibility of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structure diagram of the structure of the anti-lock structure of the embossing machine cylinder shaft section of the utility model.

[0020] Figure 2 is an explosion diagram of the anti-lock structure of the embossing machine cylinder shaft section of the utility model.

[0021] Figure 3 is a structure diagram of the pressure bearing of the anti-lock structure of the embossing machine cylinder shaft section of the utility model.

[0022] As shown in the figure: 1, embossing machine cylinder; 2, center hole; 3, shaft; 4, pressure bearing; 41, base layer; 42, outer layer; 43, roller; 5, mounting hole; 6, oil guide groove. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects of the utility model to be solved more clear and obvious, the utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and do not limit the utility model.

[0024] In the description of the utility model, it should be pointed out that, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; for ordinary skilled in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to the specific circumstances.

[0025] I. The working principle of the utility model:

[0026] The utility model provides a kind of structure of the anti-lock structure of the embossing machine cylinder shaft section, core component includes embossing machine cylinder 1. There is stepped center hole 2 in the center position of embossing machine cylinder 1, and shaft 3 is tightly fitted in the center hole 2. Shaft 3 is as the support and power transmission component of cylinder operation, and pressure bearing 4 is installed at its both ends, and this structure design is the key to solve the problem of shaft section lock of the utility model.

[0027] The pressure bearing 4 adopts an innovative structural design, which is composed of a metal base layer 41 and a polymer outer layer 42. In the circumferential direction of the polymer outer layer 42, a plurality of rollers 43 are uniformly distributed. The metal base layer 41 can provide sufficient strength and rigidity to support the axial and radial pressure during the operation of the roller. The polymer outer layer 42 has good wear resistance and self-lubricating properties, reducing friction with the rollers 43 and other components. The design of the rollers 43 allows the pressure bearing to convert sliding friction between the roller and the shaft into rolling friction during operation, greatly reducing friction. When the embossing machine roller operates, the rotation of the roller drives the rotation of the outer layer 42 of the pressure bearing, and the rollers 43 roll between them, allowing the shaft 3 to operate relatively smoothly and effectively avoiding the occurrence of seizure. At the same time, a radial gap of 0.5-1.5mm is designed between the shaft 3 and the center hole 2. The existence of this gap provides a certain buffer space for the shaft section during thermal expansion and contraction. When the roller works in a high temperature environment and expands due to heat, the shaft section has enough space to expand and will not be too tight due to expansion, further ensuring that the shaft section will not seize.

[0028] In order to meet the needs of the embossing machine roller for different temperatures, a spiral electric heating wire is embedded inside the embossing machine roller 1. The spiral design allows the electric heating wire to heat the roller more evenly, ensuring the consistency of the roller surface temperature. The electric heating wire is connected to a temperature control device through a wire. The temperature control device integrates a temperature sensor and a PID adjustment module. The temperature sensor monitors the temperature of the roller in real time and feeds back the temperature signal to the PID adjustment module. The PID adjustment module automatically adjusts the heating power of the electric heating wire according to the preset temperature value and the feedback actual temperature value. When the actual temperature is lower than the preset temperature, the PID adjustment module increases the heating power to make the electric heating wire generate more heat; when the actual temperature is higher than the preset temperature, the PID adjustment module reduces the heating power to reduce heat generation. Through this precise temperature control method, not only can the strict requirements of different embossing processes on temperature be met, but also the abnormal thermal expansion and contraction of the shaft section caused by excessive high or low temperature can be avoided, thereby indirectly ensuring the stable operation of the shaft section and preventing the occurrence of seizure.

[0029] The rolling shafts 43 are evenly distributed along the circumference of the pressure bearing 4 and arranged horizontally. This even distribution and horizontal arrangement can make the pressure bearing bear the pressure of the roller more evenly in each direction, ensuring the stability of the roller operation. The surface of each rolling shaft 43 is provided with a nano ceramic coating, which has extremely high hardness, good wear resistance and self-lubricating property. During the rolling process of the rolling shaft 43, the nano ceramic coating can effectively resist wear and tear, prolong the service life of the rolling shaft, and further reduce the friction coefficient between the rolling shaft and other components, reduce energy loss and improve the working efficiency of the pressure bearing. From multiple aspects, it synergistically acts to prevent the occurrence of the shaft segment locking phenomenon.

[0030] The rotating shaft 3 is provided with 6-12 equiangularly distributed mounting holes 5, which are internally threaded structures with a hole depth of 1 / 3-1 / 2 of the diameter of the rotating shaft. These mounting holes 5 are mainly used to install other auxiliary components. For example, in some special embossing processes, specific clamps or transmission devices may need to be installed, which can be conveniently and firmly installed through these mounting holes. At the same time, the equiangular distribution design ensures the dynamic balance of the rotating shaft during operation after installing auxiliary components, avoids vibration caused by uneven local weight, and further affects the normal operation of the shaft segment and causes locking problems.

[0031] In order to further reduce friction and improve the operation performance of the shaft segment, a graphite lubricating layer is provided between the base layer 41 of the pressure bearing 4 and the rotating shaft 3. Graphite has good lubricating properties and can form a lubricating film between the base layer 41 and the rotating shaft 3, reducing direct friction between the two. In addition, an annular oil guide groove 6 is provided on the outer circumferential surface of the outer layer 42, which is in communication with the lubricating system through a radial oil channel. The lubricating system delivers lubricating oil to the annular oil guide groove 6 through the radial oil channel. After the distribution of the lubricating oil in the oil guide groove, the rolling shaft 43 and the contact parts of the outer layer 42 and other components can be lubricated, further improving the lubricating effect of the pressure bearing, reducing friction and wear, providing more reliable protection for the stable operation of the shaft segment, and effectively preventing the occurrence of the locking phenomenon.

[0032] The surface of the rotating shaft 3 is treated by nitriding to form a hardened layer with a thickness of 0.1-0.3mm and a surface hardness of HRC55-60. Nitriding treatment can significantly improve the hardness and wear resistance of the surface of the rotating shaft. During the operation of the embossing machine, the rotating shaft bears a large pressure and friction force. The hardened layer after nitriding treatment can effectively resist wear and tear, prolong the service life of the rotating shaft. At the same time, the high surface hardness can also ensure that the rotating shaft is not easy to deform during long-time operation, maintain good matching precision, ensure the stable operation of the shaft segment, and prevent the locking problem caused by the wear or deformation of the rotating shaft.

[0033] II. Embodiment

[0034] In the installation of the pressure bearing 4, first of all, the base layer 41 of metal material is assembled with the rotating shaft 3, ensuring that the graphite lubricating layer between the base layer 41 and the rotating shaft 3 is evenly coated and has consistent thickness. Then the polymer outer layer 42 with the rolling shaft 43 is installed on the base layer 41, so that the rolling shaft 43 is evenly distributed in the circumferential direction. During installation, the installation accuracy of the pressure bearing must be strictly controlled to ensure its coaxiality with the rotating shaft 3, with an error of within ±0.05 mm. After installation, the pressure bearing is subjected to preliminary rotation test to ensure that the rolling shaft 43 can roll smoothly without jamming.

[0035] The rotating shaft 3 with the assembled pressure bearing 4 is installed into the stepped center hole 2 of the embossing machine cylinder 1. During installation, the radial clearance between the rotating shaft 3 and the center hole 2 must be uniform, with a clearance value controlled within the range of 0.5-1.5 mm. Special measuring tools such as feeler gauges can be used to measure the radial clearance at multiple points to ensure that the clearance meets the design requirements. After installation, the cylinder is subjected to trial operation to check whether the rotation of the cylinder is smooth and whether there is abnormal vibration or noise.

[0036] The spiral electric heating wire is tightly embedded inside the embossing machine cylinder 1 according to the design requirements, ensuring that the spiral spacing of the electric heating wire is uniform and in good contact with the inner wall of the cylinder. Then the wires connecting the electric heating wire and the temperature control device are connected firmly, without short circuit or open circuit. The preset temperature value is set in the temperature control device, for example, for a certain plastic film embossing process, the preset temperature is 120°C. The temperature control device and the electric heating wire are turned on, and the cylinder starts to heat, and the temperature change of the cylinder is monitored in real time through the temperature sensor. The adjustment of the heating power of the electric heating wire by the PID adjustment module is observed to ensure that the temperature can be stabilized near the preset value with a fluctuation range of within ±2°C.

[0037] The rolling shaft 43 is regularly checked to observe the wear of the nano ceramic coating. If slight wear of the coating is found, it can be repaired through professional coating repair process; if the wear is serious, the rolling shaft needs to be replaced in time. At the same time, the working condition of the lubrication system is regularly checked to ensure that the supply of lubricating oil is sufficient and that there is no blockage in the annular oil guide groove 6 and the radial oil channel. Every certain working time, for example, 500 hours, the lubrication system is cleaned and the lubricating oil is replaced to ensure good lubrication effect.

[0038] When auxiliary components need to be installed, appropriate bolts or connecting pieces are selected according to the installation requirements of the auxiliary components. After the bolts are inserted through the installation holes of the auxiliary components, they are screwed into the corresponding installation holes 5 on the rotating shaft 3, and the torque wrench is used to tighten them according to the specified torque value to ensure that the auxiliary components are installed firmly. After installation, the embossing machine is again subjected to trial operation to check the operation of the equipment after the installation of the auxiliary components, ensuring that there is no abnormal vibration or other problems.

[0039] In the nitriding treatment of the rotating shaft 3, first, the rotating shaft is cleaned and degreased to remove the oil stains and impurities on the surface. Then the rotating shaft is put into the nitriding furnace and treated according to the predetermined nitriding process parameters. The nitriding temperature is generally controlled between 500-600℃, and the nitriding time is determined according to the required hardening layer thickness, for example, for a hardening layer thickness of 0.1-0.3mm, the nitriding time is 8-12 hours. During the nitriding process, the gas flow and pressure in the furnace must be strictly controlled to ensure the consistency of the nitriding effect. After the nitriding treatment is completed, the hardening layer on the surface of the rotating shaft is detected for hardness and thickness to ensure that the hardening layer thickness is between 0.1-0.3mm and the surface hardness reaches HRC55-60.

[0040] Through the detailed operation and maintenance of the above specific embodiments, the advantages of the anti-lock structure of the embossing machine roller shaft segment can be fully utilized, the working efficiency and product quality of the embossing machine are improved, and significant economic benefits are brought to the enterprise.

[0041] The above describes the utility model and its implementation mode, this kind of description has no limit, and the embodiment shown in the drawing is only one of the utility model, the actual structure is not limited to this. In general, if the ordinary skilled in the art is inspired, without departing from the utility model creation tenet, does not create the structure mode and the embodiment similar to this technical scheme without the creative design, all should belong to the protection scope of the utility model.

Claims

1. A structure for preventing the locking of the shaft section of the cylinder of a embosser, comprising an embosser cylinder (1), characterized in that: The embossing machine roller is provided with a stepped center hole (2) in the center, and a rotating shaft (3) is arranged in the center hole, and pressure bearings (4) are arranged at both ends of the rotating shaft (3); The pressure bearing (4) comprises a base layer (41) made of metal and a polymer outer layer (42), a plurality of rollers (43) are uniformly distributed in the circumferential direction of the outer layer (42), and a radial gap of 0.5-1.5mm is formed between the rotating shaft (3) and the center hole (2).

2. The anti-lock structure of a cylinder shaft section of a embossing machine according to claim 1, wherein: The embossing machine roller (1) is internally embedded with a spiral electric heating wire, the electric heating wire is connected with a temperature control device through a wire, and the temperature control device is provided with a temperature sensor and a PID adjustment module.

3. The anti-lock structure of a cylinder shaft section of a embossing machine according to claim 1, wherein: The rollers (43) are uniformly distributed along the circumference of the pressure bearing (4) and arranged horizontally, and each roller (43) is provided with a nano ceramic coating on the surface.

4. The anti-lock structure for a cylinder shaft section of a coining press according to claim 1, wherein: The rotating shaft (3) is provided with 6-12 equiangularly distributed mounting holes (5), the mounting holes (5) adopt an internal thread structure, and the hole depth is 1 / 3-1 / 2 of the diameter of the rotating shaft.

5. The anti-lock structure for a cylinder shaft section of a coining press according to claim 1, wherein: A graphite lubricating layer is arranged between the base layer (41) of the pressure bearing (4) and the rotating shaft (3), an annular oil guide groove (6) is arranged on the outer circumferential surface of the outer layer (42), and the oil guide groove (6) is communicated with a lubricating system through a radial oil channel.

6. The anti-lock structure for a cylinder shaft section of a coining press according to claim 1, wherein: The surface of the rotating shaft (3) is subjected to nitriding treatment to form a hardened layer, the thickness of the hardened layer is 0.1-0.3mm, and the surface hardness reaches HRC55-60.

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