Packaging box offset press with automatic pressure adjusting function

Abstract

The utility model relates to the technical field of packing box offset presses, in particular to a packing box offset press with an automatic pressure adjusting function, which comprises an offset press body, through grooves are arranged on two sides of the offset press body, and an impression cylinder capable of moving along the length direction of the offset press body is further arranged on the offset press body. A drying assembly used for drying printing ink on a packaging box is further arranged in the offset press body, a pressure adjusting assembly used for driving the impression cylinder to move is further arranged on the offset press body, the pressure adjusting assembly comprises a sliding piece capable of sliding in the through groove, and the sliding piece is movably connected with the impression cylinder. The pressure adjusting assembly further comprises a supporting block, the rotary driving piece is adopted to enable the lead screw to rotate, then the impression cylinder is made to move, the pressure is detected in real time in cooperation with the pressure sensor, adjustment is conducted according to the pressure value, and the problem that a traditional structure is low in precision is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of carton offset printing machines, and particularly relates to a carton offset printing machine with an automatic pressure regulating function. Background Art

[0002] An offset printing machine is a printing device, also known as a lithographic printing press. It uses a rubber blanket or rubber plate to transfer ink to the printing plate, and then transfers the image to paper or other printing materials. Offset printing machines are usually used for large-scale printing production, such as books, magazines, leaflets, etc. It has the characteristics of high speed, high efficiency and high quality, and is a commonly used printing device in the printing industry. The principle of the offset printing machine is that the water roller first wets the printing plate, and a water film is formed in the blank area to repel the ink. The ink roller transfers the ink to the graphic area of the printing plate. The graphics on the printing plate are indirectly transferred to the printing substrate (paper, plastic, etc.) through the rubber blanket cylinder (intermediate medium) to complete the printing.

[0003] Chinese Patent CN214267001U discloses a highly adaptable offset printing machine, which includes a chassis. Inside the chassis, there is a rubber blanket cylinder and a pressure cylinder that abuts against the rubber blanket cylinder. The pressure cylinder includes a core shaft and a cylinder body coaxially arranged on the core shaft. Arc-shaped guide grooves are opened on the opposite side plates of the chassis, and the center of the arc-shaped guide grooves falls on the axis of the rubber blanket cylinder. The end of the core shaft passes through the arc-shaped guide groove and exits from the side plate of the chassis. A swing arm that can swing around the axis of the rubber blanket cylinder is rotatably connected to the outer wall of the chassis, and the end of the core shaft extending out of the chassis is rotatably connected to the swing arm. The core shaft is connected to a power mechanism for driving the core shaft to rotate, and the swing arm is connected to a driving mechanism for driving the swing arm to swing. This patent drives the belt to rotate through a motor and moves through the swing arm, and then makes the pressure cylinder move, thereby adjusting the printing pressure.

[0004] In this prior art, the belt is driven by a motor to rotate and moves through the swing arm, and then the pressure cylinder moves, thereby adjusting the printing pressure. However, the movement mode of the motor driving the swing arm through the belt is affected by factors such as belt wear, elongation, and slippage between the belt and the pulley, resulting in relatively low movement accuracy. The transmission structure is relatively complex, including multiple mechanical components and connection points, increasing the overall complexity and failure rate of the equipment. This complex structure not only increases the maintenance cost of the equipment, but also is prone to problems such as wear and looseness during long-term operation, further affecting the stability and reliability of the printing operation. Content of the Utility Model

[0005] The purpose of the present utility model is to provide a box offset printing machine with an automatic pressure adjustment function. A rotating driving member is used to rotate a lead screw, thereby moving an impression cylinder, and cooperating with a pressure sensor to detect the pressure in real time and adjust according to the pressure value, solving the problem of low precision of the traditional structure.

[0006] To solve the problems of the existing technology, the present utility model provides a box offset printing machine with an automatic pressure adjustment function, including an offset printing machine body. At both ends of the offset printing machine body, a plate cylinder is rotatably arranged. Directly below the plate cylinder, a blanket cylinder that can contact the plate cylinder is also rotatably arranged. On the offset printing machine body, a guide roller for guiding the box is also arranged. Through grooves are opened on both sides of the offset printing machine body. The offset printing machine body also includes an impression cylinder that can move along the length direction of the offset printing machine body. A drying component for drying the ink on the box is also arranged in the offset printing machine body. A pressure adjustment component for driving the impression cylinder to move is also arranged on the offset printing machine body. The pressure adjustment component includes a sliding member that can slide in the through groove, and the sliding member is movably connected to the impression cylinder. The pressure adjustment component also includes a support block, and a pressure sensor for detecting pressure is arranged between the support block and the sliding member. The pressure adjustment component also includes a linear driving mechanism for moving the sliding member. The linear driving mechanism includes a moving member that can move along the length direction of the offset printing machine body, and a buffer structure is arranged between the moving member and the support block.

[0007] Preferably, the buffer structure includes a slide bar installed on the support block, and one end of the slide bar is slidably arranged in the moving member. A spring is sleeved outside the slide bar. One end of the spring is connected to the support block, and the other end of the spring is connected to the moving member.

[0008] Preferably, a slide rail is arranged along the length direction in the through groove, and a chute that cooperates with the slide rail is also opened on the sliding member, and the sliding member can slide on the slide rail.

[0009] Preferably, the linear driving mechanism also includes a bearing seat fixed on the offset printing machine body, and a lead screw is rotatably arranged on the bearing seat. The lead screw is arranged along the length direction of the offset printing machine body. The lead screw is threadedly connected to the moving member. The linear driving mechanism also includes a rotating driving member for driving the lead screw to rotate, and the output end of the rotating driving member is connected to the lead screw.

[0010] Preferably, the drying component includes an air outlet fixed inside the offset printing machine body, and a plurality of ventilation grooves are distributed along the length direction at the bottom of the air outlet. A sleeve is also arranged at the top of the air outlet, and a blower for allowing air to enter the air outlet is arranged inside the sleeve.

[0011] Preferably, a heating component for heating air is further provided inside the drying component, and a temperature sensor for detecting the temperature inside the air outlet device is also provided inside the drying component.

[0012] Preferably, a filter element for filtering dust is further provided inside the sleeve, and the filter element is detachably arranged in the sleeve.

[0013] The beneficial effects of this application compared with the prior art are as follows:

[0014] 1. In this application, a through groove is opened on the offset printing press body, and a slide rail is arranged in the through groove. The sliding part can slide on the slide rail, and a pressure sensor for detecting pressure is integrated on the sliding part. When the impression cylinder presses the packaging box against the blanket cylinder, the pressure sensor will detect the pressure between the impression cylinder and the blanket cylinder. After the control system in the offset printing press receives the pressure signal, it will start the rotary drive part to rotate the lead screw, thereby precisely adjusting the distance between the impression cylinder and the blanket cylinder. This mechanism realizes the automatic adjustment of the printing pressure, ensures the stability of the printing quality, and significantly reduces the errors caused by human factors;

[0015] 2. In addition, this application also provides a support block and a moving part. The sliding rod in the support block can smoothly move in the moving part, and a spring is sleeved on the sliding rod. The function of the spring is to effectively buffer the impact force between the impression cylinder and the blanket cylinder when adjusting the impression cylinder, preventing the internal pressure sensor from being damaged by excessive impact force;

[0016] 3. In order to accelerate the drying process of the ink on the packaging box, this application also provides an air outlet device. Multiple ventilation grooves are equipped at the bottom of the air outlet device to ensure that the hot air can be evenly dispersed onto the packaging box. When the packaging box passes by the air outlet device during the conveying process, the hot air can quickly dry the ink on the packaging box. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of a packaging box offset printing press with an automatic pressure adjustment function according to the present utility model;

[0018] Figure 2 is a three-dimensional schematic diagram of the pressure adjustment component and the drying component of a packaging box offset printing press with an automatic pressure adjustment function according to the present utility model;

[0019] Figure 3 is a three-dimensional structural schematic diagram of the pressure adjustment component of a packaging box offset printing press with an automatic pressure adjustment function according to the present utility model;

[0020] Figure 4 is a three-dimensional structural schematic diagram of the drying component of a packaging box offset printing press with an automatic pressure adjustment function according to the present utility model;

[0021] Figure 5 It is a first exploded structural schematic diagram of a drying component of a box offset printing machine with an automatic pressure adjustment function of the present utility model;

[0022] Figure 6 It is a second exploded structural schematic diagram of a drying component of a box offset printing machine with an automatic pressure adjustment function of the present utility model.

[0023] The reference numerals in the figure are: 1, offset printing machine body; 11, plate cylinder; 12, blanket cylinder; 13, impression cylinder; 14, through groove; 141, slide rail; 2, drying component; 21, air outlet; 211, sleeve; 212, filter element; 213, fan; 3, pressure adjustment component; 31, sliding member; 311, pressure sensor; 312, support block; 313, slide bar; 3131, spring; 32, linear drive mechanism; 321, bearing seat; 322, lead screw; 323, rotary drive member; 324, moving member. Specific embodiments

[0024] In order to further understand the features, technical means, and specific purposes and functions achieved by the present utility model, the present utility model will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] Referring to Figures 1 - 6 As shown, the present utility model provides a box offset printing machine with an automatic pressure adjustment function, including an offset printing machine body 1. Plate cylinders 11 are rotatably arranged at both ends of the offset printing machine body 1. A blanket cylinder 12 that can contact the plate cylinder 11 is also rotatably arranged directly below the plate cylinder 11. Guide rollers for guiding the box are also arranged on the offset printing machine body 1. Through grooves 14 are also opened on both sides of the offset printing machine body 1. The offset printing machine body 1 also includes an impression cylinder 13 that can move along the length direction of the offset printing machine body 1. A drying component 2 for drying the ink on the box is also arranged in the offset printing machine body 1. A pressure adjustment component 3 for driving the impression cylinder 13 to move is also arranged on the offset printing machine body 1. The pressure adjustment component 3 includes a sliding member 31 that can slide in the through groove 14, and the sliding member 31 is movably connected to the impression cylinder 13. The pressure adjustment component 3 also includes a support block 312. A pressure sensor 311 for detecting pressure is also arranged between the support block 312 and the sliding member 31. The pressure adjustment component 3 also includes a linear drive mechanism 32 that can move the sliding member 31. The linear drive mechanism 32 includes a moving member 324 that can move along the length direction of the offset printing machine body 1, and a buffer structure is also arranged between the moving member 324 and the support block 312.

[0026] When the packaging box enters the printing area, the ink on the plate cylinder 11 is transferred to the blanket cylinder 12, and then the blanket cylinder 12 transfers the ink to the packaging box. At this time, the pressure sensor 311 detects the pressure between the impression cylinder 13 and the blanket cylinder 12 and feeds back a signal to the control system. If the pressure does not meet the preset value, the control system of the offset printing machine activates the linear drive mechanism 32 to drive the slider 31 to slide in the through slot 14, thereby adjusting the position of the impression cylinder 13 until the pressure reaches the preset value. At the same time, the drying assembly 2 dries the ink on the packaging box to ensure the printing quality. During the whole process, the buffer structure protects the pressure sensor 311 from damage.

[0027] The buffer structure includes a slide bar 313 installed on the support block 312, and one end of the slide bar 313 is slidably arranged in the moving part 324. A spring 3131 is sleeved outside the slide bar 313. One end of the spring 3131 is connected to the support block 312, and the other end of the spring 3131 is connected to the moving part 324.

[0028] A slide rail 141 is arranged along the length direction in the through slot 14, and a chute that cooperates with the slide rail 141 is also formed on the slider 31, and the slider 31 can slide on the slide rail 141. The linear drive mechanism 32 further includes a bearing seat 321 fixed on the offset printing machine body 1, and a lead screw 322 is rotatably arranged on the bearing seat 321. The lead screw 322 is arranged along the length direction of the offset printing machine body 1. The lead screw 322 is threadedly connected to the moving part 324. The linear drive mechanism 32 further includes a rotary drive part 323 for driving the lead screw 322 to rotate, and the output end of the rotary drive part 323 is connected to the lead screw 322.

[0029] During the working process, when it is necessary to adjust the position of the impression cylinder 13, the control system of the offset printing machine activates the rotary drive part 323 to drive the lead screw 322 to rotate. Since the lead screw 322 is threadedly connected to the moving part 324, the moving part 324 moves along its length direction as the lead screw 322 rotates. At the same time, the slider 31 also slides smoothly along with the movement of the moving part 324 under the cooperation of the slide rail 141 and the chute. Finally, when the moving part 324 moves to the target position, the position of the impression cylinder 13 is also adjusted accordingly, thus achieving precise control of the printing pressure.

[0030] The drying assembly 2 includes an air outlet 21 fixed inside the offset printing machine body 1, and a plurality of ventilation slots are distributed along the length direction at the bottom of the air outlet 21. The design of the ventilation slots enables the hot air to evenly blow on the packaging box, improving the drying efficiency. A sleeve 211 is further arranged at the top of the air outlet 21, and a blower 213 for allowing air to enter the air outlet 21 is arranged inside the sleeve 211.

[0031] Inside the drying assembly 2, there is also a heating assembly for heating air. The heating assembly is responsible for heating the inhaled air to an appropriate temperature to dry the ink on the packaging box. The heating assembly can use heating elements such as resistance wires and heating sheets. And inside the drying assembly 2, there is also a temperature sensor for detecting the temperature inside the air outlet 21. Inside the sleeve 211, there is also a filter element 212 for filtering dust, and the filter element 212 is detachably arranged in the sleeve 211. The temperature sensor can monitor the temperature in the air outlet 21 in real time and feedback the signal to the control system of the offset printing machine. The control system of the offset printing machine adjusts the heating power of the heating assembly according to the feedback signal of the temperature sensor to ensure the stability and accuracy of the drying temperature.

[0032] The drying assembly 2 sucks in air through the blower 213, filters it through the filter element 212, sends it to the heating assembly for heating, and finally evenly blows it on the packaging box through the ventilation slots of the air outlet 21 to achieve drying of the ink.

[0033] The above embodiments only represent one or several implementation manners of the present utility model, and the description is relatively specific and detailed, but it should not be construed as a limitation to the scope of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the appended claims.

Claims

1. A carton offset printing machine with an automatic pressure adjustment function, comprising an offset printing machine body (1). At both ends of the offset printing machine body (1), a plate cylinder (11) is rotatably arranged. Directly below the plate cylinder (11), a blanket cylinder (12) that can contact the plate cylinder (11) is also rotatably arranged. The offset printing machine body (1) is also provided with guide rollers for guiding the carton. It is characterized in that: On both sides of the offset printing press body (1), through grooves (14) are also provided. The offset printing press body (1) further includes an impression cylinder (13) capable of moving along the length direction of the offset printing press body (1). A drying component (2) for drying the ink on the packaging box is also arranged in the offset printing press body (1). A pressure regulating component (3) for driving the movement of the impression cylinder (13) is also arranged on the offset printing press body (1). The pressure regulating component (3) includes a sliding member (31) capable of sliding in the through groove (14), and the sliding member (31) is movably connected to the impression cylinder (13). The pressure regulating component (3) further includes a support block (312). A pressure sensor (311) capable of detecting pressure is arranged between the support block (312) and the sliding member (31). The pressure regulating component (3) further includes a linear driving mechanism (32) capable of moving the sliding member (31). The linear driving mechanism (32) includes a moving member (324) capable of moving along the length direction of the offset printing press body (1), and a buffer structure is also arranged between the moving member (324) and the support block (312).

2. The offset printing machine for packaging boxes with an automatic pressure adjustment function according to claim 1, characterized in that: The buffer structure includes a sliding rod (313) installed on the support block (312). One end of the sliding rod (313) is slidably arranged in the moving member (324). A spring (3131) is sleeved outside the sliding rod (313). One end of the spring (3131) is connected to the support block (312), and the other end of the spring (3131) is connected to the moving member (324).

3. A carton offset printing machine with an automatic pressure adjustment function according to claim 1, characterized in that: A slide rail (141) is arranged along the length direction in the through groove (14). A chute cooperating with the slide rail (141) is also provided on the sliding member (31), and the sliding member (31) can slide on the slide rail (141).

4. A carton offset printing machine with an automatic pressure adjustment function according to claim 2, characterized in that: The linear driving mechanism (32) further includes a bearing seat (321) fixed on the offset printing press body (1). A lead screw (322) is rotatably arranged on the bearing seat (321). The lead screw (322) is arranged along the length direction of the offset printing press body (1). The lead screw (322) is threadedly connected to the moving member (324). The linear driving mechanism (32) further includes a rotary driving member (323) for driving the rotation of the lead screw (322). The output end of the rotary driving member (323) is connected to the lead screw (322).

5. A carton offset printing machine with an automatic pressure adjustment function according to claim 1, characterized in that: The drying component (2) includes an air outlet device (21) fixed inside the offset printing press body (1). A plurality of ventilation grooves are distributed along the length direction at the bottom of the air outlet device (21). A sleeve (211) is also arranged at the top of the air outlet device (21). A blower (213) for allowing air to enter the air outlet device (21) is arranged inside the sleeve (211).

6. The offset printing machine for packaging boxes with an automatic pressure adjustment function according to claim 5, characterized in that: A heating component for heating air is also arranged inside the drying component (2), and a temperature sensor for detecting the temperature inside the air outlet device (21) is also arranged inside the drying component (2).

7. A carton offset printing machine with an automatic pressure adjustment function according to claim 6, characterized in that: A filter element (212) for filtering dust is also arranged inside the sleeve (211), and the filter element (212) is detachably arranged in the sleeve (211).

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