Pressure detection system of printing machine

Abstract

The utility model discloses a pressure detection system of a printing machine, which is characterized in that a fixing frame is arranged on a back plate, and the pressure detection system can be fixed with the printing machine through the fixing frame and used as auxiliary equipment of the printing machine; a switch and a pressing air cylinder are arranged between the back plate and the front cover, an extrusion device is arranged at the force application end of the pressing air cylinder, a pressing measuring scale is arranged in cooperation with the extrusion device, and the force application end of the pressing measuring scale is arranged on the extrusion device; a feeding port is formed in the bottom of the back plate, the extrusion device and the downward pressing measuring ruler are both arranged on the upper portion of the feeding port, when a paperboard is tested, detection numerical values are determined according to the strength and the thickness of the paperboard, detection is more accurate, the thickness of the paperboard is simply measured, the strength of the paperboard is included in the detection range, and the detection accuracy is improved. The test data is more accurate, the test mode is automatic, the test is more concise, and the efficiency is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of printing equipment, and in particular relates to a pressure detection system for a printing press. Background Art

[0002] As is known to all, in order to improve printing efficiency and ensure printing quality, printing equipment is usually equipped with cardboard detection equipment, the purpose of which is to test the thickness of the cardboard and avoid damage to the cardboard during printing.

[0003] The existing detection method is probe detection, which applies force to the cardboard by driving the cylinder downward. When the pressure reaches a certain level, the cylinder stops running to measure the pressure of the probe. The thickness of the cardboard is obtained by reading the pressure. However, this detection method has the following technical problems:

[0004] 1. When the probe is pressed down, the area where the probe squeezes the cardboard is limited. Especially when testing corrugated paper, the maximum force strength of each part of the cardboard is uneven. Simply testing the cardboard thickness by pressing the probe down will lead to inaccurate detection due to uneven force on the cardboard.

[0005] 2. The existing detection method is single-point detection. Detecting only a single point will lead to inaccurate detection data. If the data is superimposed after multi-point detection, it will increase the difficulty of detection, which is ultimately not conducive to rapid detection by the user unit.

[0006] 3. The existing detection equipment is separated from the printing equipment, and it is impossible to perform thickness detection in time before printing, which affects the detection efficiency.

[0007] In view of the shortcomings of the existing technology, as technicians in this industry, it is urgent to improve the existing cardboard testing equipment to avoid the occurrence of the above problems. Summary of the Invention

[0008] In order to overcome the shortcomings of the existing technology, the utility model provides a printing press pressure detection system, which combines multiple detection devices to perform multi-point joint detection on the cardboard, thereby maximizing the detection accuracy and laying a good foundation for improving the printing quality of the cardboard.

[0009] A printing press pressure detection system includes a back plate and a front cover, wherein a fixing frame is provided on the back plate and can be fixed to the outside through the fixing frame;

[0010] A switch and a downward pressure cylinder are provided between the back plate and the front cover. An extrusion device is provided on the force-applying end of the downward pressure cylinder. A downward pressure measuring ruler is provided in conjunction with the extrusion device. The force-applying end of the downward pressure measuring ruler is provided on the extrusion device. A feed port is provided at the bottom of the back plate. The extrusion device and the downward pressure measuring ruler are both provided on the upper part of the feed port.

[0011] A horizontal fixing plate is provided between the back plate and the front cover, and the downward pressure cylinder and the downward pressure measuring ruler are fixed on the horizontal fixing plate.

[0012] The switch is a photoelectric switch, which is fixed on a horizontal fixed plate and arranged vertically toward the feed port.

[0013] The bottom surface of the extrusion device is a plane or an arc surface, and a fixing hole is provided on the extrusion device to be connected and fixed to the force-applying end of the downward pressure cylinder.

[0014] The downward pressure measuring ruler is fixed on the vertical seat through a slider, and the bottom end of the downward pressure measuring ruler is locked and fixed to the extrusion device.

[0015] The downward pressure measuring ruler is arranged on the driving end of the linkage cylinder, the downward pressure measuring ruler is supported on the extrusion device, and the linkage cylinder is linked with the downward pressure cylinder.

[0016] There are two linkage cylinders which are symmetrically arranged on the left and right sides of the extrusion device, and can realize the force extrusion of the extrusion device in a symmetrical and balanced manner.

[0017] A horizontal fixing plate is welded on the back plate, an inclined material guide plate is provided at the bottom of the back plate, and a material feed port is provided between the inclined material guide plate and the bottom of the front cover.

[0018] The beneficial effects of the utility model are as follows: the utility model comprises a back plate and a front cover, a fixing frame is provided on the back plate, which can be fixed to the printing press through the fixing frame and used as an auxiliary equipment of the printing press; a switch and a downward pressure cylinder are provided between the back plate and the front cover, a squeezing device is provided on the force-applying end of the downward pressure cylinder, a downward pressure measuring ruler is provided in conjunction with the squeezing device, and a force-applying end of the downward pressure measuring ruler is provided on the squeezing device; a feed port is provided at the bottom of the back plate, and the squeezing device and the downward pressure measuring ruler are both provided on the upper part of the feed port. When testing the cardboard, the detection value is determined according to the strength and thickness of the cardboard, and the detection is more accurate. It is not just a simple measurement of the cardboard thickness. The cardboard strength is included in the detection range, and the test data is more accurate. The testing method is automated, simpler, and more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of Example 1 of the utility model;

[0020] Figure 2 This is a schematic diagram of the main structure of Example 2 of the present utility model;

[0021] Figure 3 This is a schematic diagram of the main structure of Example 3 of the present utility model;

[0022] Figure 4This is a side view of the structure of the utility model;

[0023] Figure 5 It is a schematic diagram of the side structure of the rear cover;

[0024] Figure 6 This is a schematic diagram of the main structure of the rear cover;

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the extrusion device;

[0026] In the accompanying drawings, 1. fixing frame, 2. back plate, 21. vertical plate, 22. horizontal fixing plate, 23. feed port, 24. test area, 25. inclined guide plate, 3. photoelectric switch, 4. downward pressure cylinder, 5. extrusion device, 51. arc surface, 52. fixing hole, 53. threaded hole, 6. vertical seat, 7. downward pressure measuring ruler, 71. scale, 72. end of measuring ruler, 8. linkage cylinder, 81. guide head, 82. locking nut, 9. front cover, 91. bending fixing part. DETAILED DESCRIPTION

[0027] Referring to the accompanying drawings, the utility model discloses a printing press pressure detection system, which includes a back plate 2 and a front cover 9. A fixing frame 1 is provided on the back plate 2. The device can be fixed to the outside through the fixing frame 1. The outside mentioned here is the printing press. The device can be directly fixed on the printing press and used as a supporting device of the printing press.

[0028] Example 1: The present invention comprises a switch and a pressure cylinder 4 disposed between the back panel 2 and the front cover 9. A horizontal fixing plate 22 is disposed between the back panel 2 and the front cover 9, and the horizontal fixing plate 22 is welded to the back panel 2 and the front cover 9. A pressure cylinder 4 and a pressure measuring scale 7 are fixed to the horizontal fixing plate 22. The pressure measuring scale 7 is provided with a scale 71, and when measuring the thickness of the cardboard, the scale value can be read by comparing the appearance. Of course, in currently available equipment, the expansion and contraction of the pressure measuring scale 7 can be monitored by displacement, and the pressure measuring scale value can be recorded in an external PLC, which is then calculated and sent to an external switchboard for display.

[0029] The force-applying end of the downward pressure cylinder 4 is provided with an extrusion device 5, and a downward pressure measuring ruler is provided in conjunction with the extrusion device 5. The bottom surface of the extrusion device 5 is a flat surface or an arc surface. In this embodiment, Figure 7 As shown, the extrusion device 5 is provided with a semi-cylindrical structure, and a fixing hole 52 is provided on the extrusion device to be connected and fixed to the force-applying end of the downward pressure cylinder 4. Figure 1 As shown, the force-applying end of the downward pressure measuring ruler 7 extends into the extrusion device 5 through the guide head 82 and is fixed to the extrusion device 5 through the locking nut 82.

[0030] In this embodiment, the downward pressure measuring ruler 7 is fixed to the vertical seat 6 via a slider 61 , and the bottom end of the downward pressure measuring ruler 7 is locked and fixed to the extrusion device 5 to form a whole and complete linkage.

[0031] like Figure 4 、 5 As shown in Figure 6, the back panel 2 is formed by bending a plate, and the test area 24, the inclined guide plate 25 and the vertical plate 21 are formed by bending. The horizontal fixing plate 22 is first welded to the back panel 2, and then the front cover 9 is buckled onto the back panel 2. The front cover 9 is welded to the horizontal fixing plate 22, and a bending fixing portion 91 is provided on the top of the front cover 9 to lock it into one with the vertical plate 21.

[0032] A feed port 23 is provided at the bottom of the back plate 2 , and the extrusion device 5 and the downward pressure measuring ruler 7 are both provided above the feed port 23 . After the cardboard is inserted from the feed port 23 , the cardboard falls flat onto the test area 24 .

[0033] In the present invention, a switch is provided between the back plate 2 and the front cover 9. Such a switch may be a mechanical switch, which realizes the drive switch control of the extrusion device 5 and the downward pressure measuring ruler 7 by contacting the cardboard, or a photoelectric switch. In this embodiment, the switch adopts a photoelectric switch 3, which is also fixed on the horizontal fixed plate 22 and arranged toward the feed port 23.

[0034] With the above structure, after a cardboard is inserted through the cardboard feed port 23, it falls flat onto the test area 24. At this time, the photoelectric switch 3 senses the cardboard and generates a signal to drive the downward pressure cylinder 4 to move. The downward pressure cylinder 4 drives the squeezing device 5 to press downward as a whole. Because the squeezing device 5 is a semi-cylindrical structure with an arc-shaped bottom surface, the cardboard can be squeezed as a whole when squeezing, resulting in a large squeezing area. The contact surface with the cardboard is the arc surface, which prevents single-point damage. The bottom end of the downward pressure measuring ruler 7 does not directly contact the cardboard. Instead, it contacts the cardboard through the force exerted by the squeezing device 5 and is combined with data compensation. The obtained test results are accurate. After the squeezing action stops, the value of the downward pressure measuring ruler 7 is recorded by the external PLC, calculated and sent to the external switchboard for display. The downward pressure cylinder 4 moves upward, and the alarm device is activated for 3 seconds to indicate that the test is complete. This detection method is determined based on the strength and thickness of the cardboard, and the detection is more accurate. It is not just a simple measurement of the cardboard thickness. It includes the cardboard strength in the detection range, resulting in more accurate test data. The test method is automated, simpler, and more efficient.

[0035] Example 2:

[0036] On the basis of Example 1, Figure 2As shown, the utility model also can set down press measuring scale 7 on the drive end of linkage cylinder 8, linkage cylinder 8 is fixed on vertical seat 6, linkage cylinder 8 is linked with down press cylinder 4 through control valve, the measuring scale end head 72 of down press measuring scale 7 bottom is on extrusion device 5, when installing and fixing, down press measuring scale 7 need not be locked on extrusion device 5.

[0037] Through the above structure setting, when paperboard is inserted from the feed port 23, the paperboard directly lays and falls into the test area 24, at this time, the photoelectric switch 3 is inducted and moves through the signal driving down press cylinder 4, the down press cylinder 4 drives the extrusion device 5 to press down as a whole, because the extrusion device 5 is a semicylindrical structure, its bottom surface is arc-shaped, when extruding the paperboard, the paperboard can be extruded as a whole, the extrusion area is large, the bottom end of the down press measuring scale 7 does not directly contact the paperboard, it contacts the paperboard through the force extrusion device 5 and combines data compensation, the obtained test effect is accurate, after the extrusion action stops, the down press measuring scale value is recorded by the external PLC, after operation, the external main machine is pushed, the down press cylinder 4 moves upward, the alarm device is started for 3 seconds to remind the detection completion, this detection mode is determined according to the paperboard strength and thickness, and the detection is more accurate, not only the paperboard thickness is simply measured, the paperboard strength is included in the detection range, the higher the paperboard strength is, the closer the machine pressure value is to the paperboard thickness value, otherwise, the paperboard strength is low, the machine pressure value is far from the paperboard thickness value, this test data is more accurate, the test mode is automatically carried out, and it is more simple and efficient.

[0038] Example 3:

[0039] The measuring mode of the above example 2 is in operation, the measuring scale end head 72 at the bottom end of the down press measuring scale 7 is extruded with the side top surface of the extrusion device 5, which can cause the one-side extrusion force of the extrusion device 5 to be too large, and there is a risk of left-right deviation of test data, in order to improve the above problems, such as Figure 3 As shown, the linkage cylinder 8 is two and symmetrically arranged on the left and right sides of the extrusion device 5, and can symmetrically and equally extrude the extrusion device 5. In this way, the extrusion device 5 is prevented from being unbalanced, and the paperboard test is prevented from being inaccurate.

Claims

1. A printing press pressure detection system, characterized in that: It includes a back plate and a front cover, and the back plate is provided with a fixing frame, which can be fixed to the outside through the fixing frame; A switch and a downward pressure cylinder are provided between the back plate and the front cover. An extrusion device is provided on the force-applying end of the downward pressure cylinder. A downward pressure measuring ruler is provided in conjunction with the extrusion device. The force-applying end of the downward pressure measuring ruler is provided on the extrusion device. A feed port is provided at the bottom of the back plate. The extrusion device and the downward pressure measuring ruler are both provided on the upper part of the feed port.

2. The printing press pressure detection system according to claim 1, wherein: A horizontal fixing plate is provided between the back plate and the front cover, and the downward pressure cylinder and the downward pressure measuring ruler are fixed on the horizontal fixing plate.

3. The printing press pressure detection system according to claim 1, wherein: The switch is a photoelectric switch, which is fixed on a horizontal fixed plate and arranged vertically toward the feed port.

4. The printing press pressure detection system according to claim 1, wherein: The bottom surface of the extrusion device is a plane or an arc surface, and a fixing hole is provided on the extrusion device to be connected and fixed to the force-applying end of the downward pressure cylinder.

5. The printing press pressure detection system according to claim 1, wherein: The downward pressure measuring ruler is fixed on the vertical seat through a slider, and the bottom end of the downward pressure measuring ruler is locked and fixed to the extrusion device.

6. The printing press pressure detection system according to claim 1, wherein: The downward pressure measuring ruler is arranged on the driving end of the linkage cylinder, the downward pressure measuring ruler is supported on the extrusion device, and the linkage cylinder is linked with the downward pressure cylinder.

7. The printing press pressure detection system according to claim 6, wherein: There are two linkage cylinders which are symmetrically arranged on the left and right sides of the extrusion device.

8. The printing press pressure detection system according to claim 1, wherein: A horizontal fixing plate is welded on the back plate, an inclined material guide plate is provided at the bottom of the back plate, and a material feed port is provided between the inclined material guide plate and the bottom of the front cover.

Images