Separating device for upper die and lower die

Abstract

The utility model relates to an upper and lower die separation device. The eccentric shaft is a stepped shaft and comprises a main shaft section and an eccentric section, the axis of the main shaft section is parallel to the axis of the eccentric section, and a gap exists between the two axes; the lower die is arranged on the main shaft section in a sleeving mode, and the lower die can rotate relative to the main shaft section with the axis of the main shaft section as the rotating center; the upper die is positioned above the lower die; and the deviation assembly is in transmission connection with the eccentric section, and under the driving of the deviation assembly, the eccentric shaft rotates with the axis of the eccentric section as the rotating center, so that the lower die deviates relative to the upper die, the lower die is far away from the upper die, and therefore the situation that when no product exists in the conveying unit, patterns of the lower die and the upper die are subjected to transfer printing mutually, and then subsequent transfer printing is affected is avoided.

Description

Technical Field

[0001] The present application relates to the field of transfer technology, and in particular to an upper and lower mold separation device. Background Art

[0002] Lid printing machine, for lids made of plastic used in daily life, the outer surface of lunch boxes usually needs to be printed for beauty. The entire printing process of the automatic printing production line includes: cup feeding, flame, printing, curing, defective product detection, and finished product delivery.

[0003] At present, the fast-moving consumer beverage packaging industry is dominated by plastic caps. With the gradual development of the market and the changes in demand, the requirements for cap printing machines are getting higher and higher. In the process of changes in external demand, the shortcomings and defects of the cap printing equipment in the current market are revealed.

[0004] The printing process of the existing transfer equipment is that when the printing rubber adhered to the surface of the upper mold on the transfer roller passes through the printing plate roller one by one, each rubber blanket begins to receive the monochrome image on the printing plate, and the monochrome image is added to the image that has been transferred to the printing rubber, and finally a complete, multi-color image is formed on each printing rubber. When the complete printing pattern is obtained on the rubber blanket, the product will be located between the upper mold and the lower mold, and the complete pattern will be transferred to the product through extrusion on the outer surfaces of the upper and lower molds.

[0005] When there is no product in the conveying unit, the printing unit of the transfer equipment continues to print. The impact of this is that the ink attached to the rubber cloth on the upper mold of the transfer equipment will contaminate the lower mold. As we all know, ink has a strong adhesion ability, and because of its unique chemical properties, the ink is difficult to clean, and the ink will solidify quickly in a short time, causing the lower mold to adhere to the ink. When the conveying unit correctly conveys the lid next time, the ink on the lower mold will contact the inner surface of the lid, causing contamination of the inner surface of the lid. Most of the cups printed by the existing transfer equipment on the market are food-grade plastic lids. The ink will harm human health after being consumed by the human body. And if you want to clean the ink on the mold, you need to remove the lower mold and clean it with a special cleaning agent, which is time-consuming and labor-intensive, resulting in reduced production efficiency and difficulty in meeting the existing market environment. Utility Model Content

[0006] In order to solve the above technical problems, this application provides the following technical solutions:

[0007] The present application provides an upper and lower mold separation device, comprising:

[0008] Bracket;

[0009] The eccentric shaft is a stepped shaft, and the eccentric shaft includes a main shaft section and an eccentric section. The axis of the main shaft section is parallel to the axis of the eccentric section, and there is a gap between the two axes.

[0010] A lower die is sleeved on the main shaft section, and the lower die can rotate relative to the main shaft section with the axis of the main shaft section as the rotation center;

[0011] an upper die, the upper die being located above the lower die; and

[0012] The offset component is transmission-connected with the eccentric section. Driven by the offset component, the eccentric shaft rotates with the axis of the eccentric section as the rotation center, so that the lower die is offset relative to the upper die.

[0013] In one embodiment, the bracket includes a first side plate and a second side plate that are spaced apart from each other, the eccentric shaft is mounted on the first side plate and the second side plate, and the offset assembly is mounted on the first side plate or the second side plate.

[0014] In one embodiment, the eccentric segment includes a first eccentric segment and a second eccentric segment, the first eccentric segment and the second eccentric segment are respectively arranged at two ends of the main shaft segment, and the axis of the first eccentric segment and the axis of the second eccentric segment are on the same straight line.

[0015] In one embodiment, the main shaft section includes a first main shaft section and a second main shaft section connected to each other, and the lower mold is sleeved on the first main shaft section and the second main shaft section at the same time.

[0016] In one embodiment, the first main shaft section and the second main shaft section are stepped, the diameter of the first main shaft section is larger than the diameter of the second main shaft section, the lower die and the first main shaft section are clearance-matched, and a bearing is provided in the clearance between the lower die and the second main shaft section.

[0017] In one embodiment, the offset assembly includes: a driving unit and a connecting unit, wherein the power output end of the driving unit is connected to the connecting unit, and the eccentric section is fixedly connected to the connecting unit, and the driving unit pushes the connecting unit so that the connecting unit rotates with the axis of the eccentric section as the rotation center.

[0018] In one embodiment, the connecting unit is provided with an axial hole, the axial hole includes a main hole and a key hole that are connected to each other, and the main hole is used to install the eccentric section;

[0019] A keyway is provided on the surface of the eccentric section, a limit key is embedded in the keyway, and the limit key is matched and installed in the key hole, so that the connecting unit drives the eccentric shaft to rotate.

[0020] In one embodiment, the shaft hole further includes a notch, one end of the notch is connected to the shaft hole, and the other end of the notch extends to a side surface of the connecting unit;

[0021] The connection unit is provided with a clamping screw which is threadedly connected to the connection unit and passes through two groove walls which are arranged opposite to each other. By adjusting the clamping screw, the elastic connection unit is deformed and the inner wall of the main hole clamps the eccentric section.

[0022] In one embodiment, the driving unit is a cylinder, and the offset assembly further includes a buffer unit connected to the connecting unit.

[0023] In one embodiment, the distance from the installation position of the connecting unit and the driving unit to the axis of the eccentric segment is smaller than the distance from the installation position of the connecting unit and the buffer unit to the axis of the eccentric segment.

[0024] This application has at least the following beneficial effects:

[0025] In the present application, the eccentric shaft is driven to rotate by the offset assembly, thereby driving the lower mold to deviate in a straight line direction, so that the lower mold is separated from the upper mold and moved closer. When there is a lack of product on the conveying unit, the lower mold can be kept away from the upper mold to prevent ink from adhering to the lower mold, avoiding the need to remove the lower mold for cleaning, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of an upper and lower mold separation device provided in an embodiment of the present application at a first viewing angle.

[0027] Figure 2 A schematic diagram of an upper and lower mold separation device provided in an embodiment of the present application at a second viewing angle.

[0028] Figure 3 for Figure 2 A local enlarged schematic diagram of point A in the middle.

[0029] Figure 4 A schematic diagram of an eccentric shaft provided in accordance with an embodiment of the present application.

[0030] Figure 5 A schematic diagram of a connection unit provided in an embodiment of the present application.

[0031] Figure 6 A partial structural schematic diagram of an offset assembly provided in one embodiment of the present application.

[0032] Figure 7 A front view of a lower mold and an eccentric shaft provided in one embodiment of the present application.

[0033] Reference numerals:

[0034] 10. Offset components;

[0035] 11. Driving unit; 12. Fixing seat; 13. Connecting unit; 14. Buffering unit; 15. Adjusting unit; 16. Locking unit; 17. Pressure detecting unit;

[0036] 111, cylinder; 112, power output end;

[0037] 131, first mounting hole; 132, shaft hole; 133, second mounting hole; 134, clamping screw;

[0038] 1321, main hole; 1322, key hole; 1323, notch;

[0039] 151, knob;

[0040] 21. Upper die; 22. Lower die; 23. Eccentric shaft; 24. Bearing; 25. Limit key;

[0041] 221, stamping block; 222, sleeve; 223, fixing block;

[0042] 231, first main shaft section; 232, second main shaft section; 233, first eccentric section; 234, second eccentric section;

[0043] 2331, keyway;

[0044] 30. Bracket;

[0045] 31. First side panel; 32. Second side panel. DETAILED DESCRIPTION

[0046] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0047] In the description of the present application, it should be understood that if the terms "length", "width", "thickness", "up", "down", "vertical", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0048] In addition, if the terms "first", "second", and "third" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0050] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0051] It should be noted that if an element is referred to as being "fixed to" or "disposed on" or "set on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0052] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0053] Reference Figure 1 , 2As shown, in some embodiments of the present application, an upper and lower mold separation device is provided, comprising: an offset assembly 10, an upper mold 21, a lower mold 22, an eccentric shaft 23 and a bracket 30. The lower mold 22 is mounted on the eccentric shaft 23, and the offset assembly 10 drives the eccentric shaft 23 to rotate.

[0054] The bracket 30 is a bearing device of the upper and lower mold separation device, and at least the offset assembly 10 and the eccentric shaft 23 are installed on the bracket 30 .

[0055] The eccentric shaft 23 is a stepped shaft, and includes a main shaft section and an eccentric section. The axis of the main shaft section and the axis of the eccentric section are not in the same straight line. Specifically, the axis of the main shaft section is parallel to the axis of the eccentric section and there is a gap between the two axes.

[0056] The upper die 21 is located above the lower die 22, and a gap is provided between the upper die 21 and the lower die 22 for the workpiece to pass through. The lower die 22 is sleeved on the main shaft section, and the lower die 22 can rotate relative to the main shaft section with the axis of the main shaft section as the rotation center. In the normal pattern transfer printing process, the workpiece is transferred to the gap between the upper die 21 and the lower die 22 on the transmission unit. Since the upper die 21 and the lower die 22 rotate toward each other, when the workpiece passes through the gap between the upper die 21 and the lower die 22, the workpiece is subjected to the friction force of the upper die 21 and the lower die 22. Under the influence of the rotation force of the upper die 21 and the lower die 22, the workpiece continuously moves forward, and as the upper die 21 and the lower die 22 roll on the workpiece, the pattern on the upper die 21 will be imprinted on the surface of the workpiece.

[0057] More specifically, combined with Figure 7 As shown, the lower mold 22 includes a plurality of stamping blocks 221 and a sleeve 222. The plurality of stamping blocks 221 are evenly distributed on the side of the sleeve 222 in the circumferential direction. The sleeve 222 is used to sleeve the eccentric shaft 23, and the sleeve 222 can rotate relative to the eccentric shaft 23. That is, the lower mold 22 completes a pad printing cycle of a workpiece in the time it takes to rotate one stamping block 221. If a workpiece is missing in the transmission unit, that is, in the next pad printing cycle, no workpiece passes through the gap between the upper mold 21 and the lower mold 22, the ink forming the pattern on the upper mold 21 will be transferred to the lower mold 22. In order to avoid the ink transferred to the lower mold 22 being transferred to the workpiece again, it is necessary to stop the transfer equipment to clean the lower mold 22, which affects the work efficiency.

[0058] The lower mold 22 also includes a fixing block 223, through which the stamping block 221 is connected to the sleeve 222. Exemplarily, there are two stamping blocks 221, which are symmetrically arranged around the axis of the sleeve 222. The lower mold 22 completes a pad printing cycle of a workpiece in the time it takes to rotate 180°.

[0059] In this solution, the offset assembly 10 is connected to the eccentric section in a transmission manner. Under the drive of the offset assembly 10, the eccentric shaft 23 rotates with the axis of the eccentric section as the rotation center, so that the lower mold 22 is offset relative to the upper mold 21. A detector is also provided on the transmission unit, and the detector is electrically connected to the offset assembly 10. The detector is used to detect whether the workpiece is missing from the transmission unit. When the detector detects that the workpiece is missing from the transmission unit, the detector controls the offset assembly 10 to drive the eccentric shaft 23 to rotate, so that the lower mold 22 is away from the upper mold 21.

[0060] Specifically, the maximum offset of the lower die 22 relative to the upper die 21 is consistent with the gap between the axis of the main shaft section and the axis of the eccentric section, and the specific maximum offset is 0.6mm-1.35mm. The eccentric shaft 23 is used to convert the rotary motion into the linear motion of the lower die 22, so as to achieve the displacement of the lower die 22, prevent the lower die 22 from adhering to the ink of the upper die 21, avoid removing the lower die 22 to remove the ink, and improve production efficiency.

[0061] Furthermore, the bracket 30 includes a first side plate 31 and a second side plate 32 which are spaced apart from each other, the eccentric shaft 23 is mounted on the first side plate 31 and the second side plate 32 , and the offset assembly 10 is mounted on the first side plate 31 or the second side plate 32 .

[0062] The eccentric shaft 23 is mounted on the first side plate 31 and the second side plate 32 , and can share the weight of the lower mold 22 to the first side plate 31 and the second side plate 32 , so as to improve the service life of the eccentric shaft 23 , the first side plate 31 and the second side plate 32 .

[0063] At the same time, combined with Figure 3 , 4 As shown, the eccentric segment includes a first eccentric segment 233 and a second eccentric segment 234, which are respectively arranged at two ends of the main shaft segment, and the axis of the first eccentric segment 233 and the axis of the second eccentric segment 234 are on the same straight line. The first eccentric segment 233 and the second eccentric segment 234 are respectively connected to the first side plate 31 and the second side plate 32. Exemplarily, the offset assembly 10 is connected to the first eccentric segment 233, the offset assembly 10 is installed on the first side plate 31, and the offset assembly 10 and the lower mold 22 are respectively arranged on both sides of the first side plate 31. The offset assembly 10 drives the eccentric shaft 23 to rotate by rotating the first eccentric segment 233. When the main shaft segment rotates, the lower mold 22 is driven to deviate.

[0064] In this solution, the main shaft section includes a first main shaft section 231 and a second main shaft section 232 connected to each other. The lower die 22 is sleeved on the main shaft section. Specifically, the lower die 22 is sleeved on the first main shaft section 231 and the second main shaft section 232 at the same time.

[0065] The eccentric shaft 23 has a first eccentric section 233, a second main shaft section 232, a first main shaft section 231 and a second eccentric section 234 which are connected in sequence, and the diameters of the two adjacent shaft sections are different, so that the eccentric shaft 23 is in a step shape. Among them, the diameter of the first main shaft section 231 is larger than the diameter of the second main shaft section 232, the lower die 22 and the first main shaft section 231 are arranged with clearance, and a bearing 24 is arranged in the clearance between the lower die 22 and the second main shaft section 232 to reduce the friction generated by the rotation of the lower die 22 relative to the eccentric shaft 23.

[0066] refer to Figure 1 , 6 As shown, in some embodiments of the present application, the offset assembly 10 includes: a driving unit 11, a connecting unit 13, a power output end 112 of the driving unit 11 is connected to the connecting unit 13, and the eccentric segment is fixedly connected to the connecting unit 13, and the driving unit 11 pushes the connecting unit 13, so that the connecting unit 13 rotates with the axis of the eccentric segment as the rotation center. The rotation of the connecting unit 13 can also drive the eccentric shaft 23 to rotate, so that the lower mold 22 is offset.

[0067] Specifically, combined Figure 5 As shown, the connection unit 13 is provided with a first mounting hole 131 and an axial hole 132. The first mounting hole 131 and the axial hole 132 penetrate the two opposite side surfaces of the connection unit 13. The first mounting hole 131 is used to connect the power output end 112 of the drive unit 11, and the axial hole 132 is used to connect the eccentric section. Among them, the axial hole 132 includes a main hole 1321 and a key hole 1322 that are connected to each other. The main hole 1321 is used to install the eccentric section. A key groove 2331 is opened on the surface of the eccentric section. The key groove 2331 is embedded with a limit key 25. The limit key 25 is installed in the key hole 1322. The relative position of the eccentric shaft 23 and the connection unit 13 is limited by the limit key 25, so that the connection unit 13 drives the eccentric shaft 23 to rotate.

[0068] Furthermore, the shaft hole 132 further includes a notch 1323, one end of the notch 1323 is connected to the shaft hole 132, and the other end extends to a side surface of the connection unit 13. The connection unit 13 is provided with a clamping screw 134, which is threadedly connected to the connection unit 13 and passes through two oppositely arranged groove walls of the notch 1323. By adjusting the clamping screw 134, the elastic connection unit 13 is deformed, and the inner wall of the main hole 1321 clamps the eccentric section.

[0069] In this solution, by adjusting the clamping screw 134, the inner wall of the main hole 1321 is clamped to the eccentric segment, so that the main hole 1321 is suitable for eccentric shafts 23 of different diameters. The connecting unit 13 can be suitable for various types of transfer devices.

[0070] Furthermore, the driving unit 11 is a cylinder 111, the offset assembly 10 further includes a buffer unit 14, the connecting unit 13 is further provided with a second mounting hole 132, and the buffer unit 14 is connected to the connecting unit 13 through the second mounting hole 132. During the resetting process, the buffer unit 14 can drive the connecting unit 13 to return to the position between the cylinder 111 and the connecting unit 13, so as to ensure the accuracy of the resetting of the connecting unit 13.

[0071] At the same time, the buffer unit 14 is a hydraulic buffer, which can smoothly bring the connecting unit 13 back to the position before the push during the recovery process, thereby reducing the vibration generated by the cylinder 111 during the repetitive process to increase the service life of the equipment.

[0072] The distance between the installation position of the connecting unit 13 and the driving unit 11 and the axis O of the eccentric segment is smaller than the distance between the installation position of the connecting unit 13 and the buffer unit 14 and the axis O of the eccentric segment. That is, the force arm from the buffer unit 14 to the axis O of the eccentric segment is greater than the force arm of the driving unit 11 pushing the connecting unit 13, and thus the pulling force F required for the buffer unit 14 to reset is 2 Smaller than the thrust F of the drive unit 11 1 The buffer unit 14 can reset the connection unit 13 with less effort.

[0073] Furthermore, the offset assembly 10 further includes an adjustment unit 15, a locking unit 16 and a pressure detection unit 17. The adjustment unit 15 is connected to the buffer unit 14 through the locking unit 16, and the pressure of the lower die 22 on the workpiece can be adjusted according to the knob 151 on the adjustment unit 15. Specifically, the total length of the buffer unit 14, the adjustment unit 15 and the locking unit 16 can be adjusted by the adjustment unit 15, so as to control the rotation angle of the connection unit 13, and then control the relative position relationship between the lower die 22 and the upper die 21, so as to adjust the extrusion force of the lower die 22 and the upper die 21 on the workpiece.

[0074] In order to prevent the driving unit 11 from interfering with the rotation angle of the connecting unit 13, the offset assembly 10 includes a fixing seat 12, and the fixing seat 12 is fixedly mounted on the bracket 30. The power output end 111 of the driving unit 11 is pivotally connected to the connecting unit 13, and the fixing end of the driving unit 11 is pivotally connected to the fixing seat 12, so that at the rotation angle of the connecting unit 13, the driving unit 11 moves relative to the connecting unit 13 and the bracket 30 to meet the position of the connecting unit 13 after rotation.

[0075] like Figure 2As shown, in order to conveniently observe the extrusion force of the lower die 22 and the upper die 21 on the workpiece, the pressure detection unit 17 is located below the connection unit 13, and the pressure detection unit 17 is connected to the connection unit 13, and the pressure applied to the pressure detection unit 17 by the rotation of the connection unit 13 is converted into the extrusion force of the lower die 22 and the upper die 21 on the workpiece. Among them, the pressure detection unit 17 is a micrometer, and the pressure applied to the pressure detection unit 17 by the connection unit 13 can display a specific value on the micrometer, so as to achieve the purpose of accurately adjusting the extrusion force of the lower die 22 and the upper die 21 on the workpiece.

[0076] The above embodiments are used to further illustrate the present application, but the present application is not limited to these specific implementations. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be understood to be within the scope of protection of the present application.

Claims

1. An upper and lower mold separation device, characterized in that: include: Bracket (30); An eccentric shaft (23), wherein the eccentric shaft (23) is a stepped shaft, and comprises a main shaft section and an eccentric section, wherein the axis of the main shaft section is parallel to the axis of the eccentric section and there is a gap between the two axes; A lower die (22), the lower die (22) being sleeved on the main shaft section, and the lower die (22) being capable of rotating relative to the main shaft section with the axis of the main shaft section as the rotation center; An upper mold (21), the upper mold (21) being located above the lower mold (22); as well as An offset component (10) is in transmission connection with the eccentric segment. Driven by the offset component (10), the eccentric shaft (23) rotates with the axis of the eccentric segment as the rotation center, so that the lower mold (22) is offset relative to the upper mold (21).

2. The upper and lower mold separation device according to claim 1, characterized in that: The bracket (30) comprises a first side plate (31) and a second side plate (32) which are spaced apart from each other, the eccentric shaft (23) is mounted on the first side plate (31) and the second side plate (32), and the offset assembly (10) is mounted on the first side plate (31) or the second side plate (32).

3. The upper and lower mold separation device according to claim 2, characterized in that: The eccentric section comprises a first eccentric section (233) and a second eccentric section (234); the first eccentric section (233) and the second eccentric section (234) are respectively arranged at two ends of the main shaft section; the axis of the first eccentric section (233) and the axis of the second eccentric section (234) are on the same straight line.

4. The upper and lower mold separation device according to claim 1, characterized in that: The main shaft section comprises a first main shaft section (231) and a second main shaft section (232) which are connected to each other, and the lower mold (22) is sleeved on the first main shaft section (231) and the second main shaft section (232) at the same time.

5. The upper and lower mold separation device according to claim 4, characterized in that: The first main shaft section (231) and the second main shaft section (232) are in a step shape, the diameter of the first main shaft section (231) is larger than the diameter of the second main shaft section (232), the lower die (22) and the first main shaft section (231) are arranged with a clearance fit, and a bearing (24) is arranged in the clearance between the lower die (22) and the second main shaft section (232).

6. The upper and lower mold separation device according to any one of claims 1 to 5, characterized in that: The offset assembly (10) comprises: a drive unit (11) and a connection unit (13); a power output end (112) of the drive unit (11) is connected to the connection unit (13), and the eccentric segment is fixedly connected to the connection unit (13); the drive unit (11) pushes the connection unit (13) so that the connection unit (13) rotates with the axis of the eccentric segment as the rotation center.

7. The upper and lower mold separation device according to claim 6, characterized in that: The connecting unit (13) is provided with an axial hole (132), the axial hole (132) comprising a main hole (1321) and a key hole (1322) which are connected to each other, and the main hole (1321) is used to install the eccentric section; A key groove (2331) is provided on the surface of the eccentric section, a limit key (25) is embedded in the key groove (2331), and the limit key (25) is installed in the key hole (1322) so that the connecting unit (13) drives the eccentric shaft (23) to rotate.

8. The upper and lower mold separation device according to claim 7, characterized in that: The shaft hole (132) further comprises a notch (1323), one end of the notch (1323) is connected to the shaft hole (132), and the other end of the notch (1323) extends to a side surface of the connecting unit (13); The connection unit (13) is provided with a clamping screw (134), which is threadedly connected to the connection unit (13) and passes through two oppositely arranged groove walls of the groove (1323). By adjusting the clamping screw (134), the elastic connection unit (13) is deformed and the inner wall of the main hole (1321) clamps the eccentric segment.

9. The upper and lower mold separation device according to claim 6, characterized in that: The driving unit (11) is a cylinder (111), and the offset assembly (10) further comprises a buffer unit (14), wherein the buffer unit (14) is connected to the connecting unit (13).

10. The upper and lower mold separation device according to claim 9, characterized in that: The distance from the installation position of the connection unit (13) and the drive unit (11) to the axis center of the eccentric segment is smaller than the distance from the installation position of the connection unit (13) and the buffer unit (14) to the axis center of the eccentric segment.

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