A relief printing device

Abstract

The application discloses a relief printing device and belongs to the technical field of paper printing, which comprises a mounting frame, a printing roller rotatably mounted on the mounting frame, a roller ink roller arranged on one side of the printing roller, an abutting roller arranged on the other side of the printing roller, a ink transmission roller arranged between the roller ink roller and the printing roller, the ink transmission roller capable of abutting against the roller ink roller and the printing roller, a driving mechanism for driving the roller ink roller and the ink transmission roller to rotate mounted on the mounting frame, a jacking piece for jacking up the ink transmission roller mounted on the mounting frame, a jacking track for sliding cooperation with the ink transmission roller formed on the mounting frame, and a first accommodating groove for clamping cooperation with a rotating shaft of the ink transmission roller formed on an end of the jacking track close to the printing roller. The application has the effect of reducing environmental pollution caused by ink.

Description

TECHNICAL FIELD

[0001] The present application relates to the paper printing technical field, especially to a relief printing device. BACKGROUND

[0002] The relief printing machine is a kind of printing equipment that transfers ink to the surface of paper or other materials through a relief plate. With the development of science and technology, the relief printing machine has gradually evolved from traditional letterpress printing to digital printing using electronic engraving and laser plate making.

[0003] Currently, in the existing relief printing machine, when the printing roller is damaged, the operator needs to remove the ink box and the printing roller at the same time, and then disassemble the printing roller in the ink box and replace the new printing roller.

[0004] According to the above related technology, the inventor believes that when the operator replaces the printing roller, the ink box needs to be disassembled together, which is time-consuming and laborious, and ink splashing may occur during the replacement process. SUMMARY

[0005] In order to reduce the pollution of ink to the environment, the present application provides a relief printing device.

[0006] The relief printing device provided by the present application adopts the following technical scheme:

[0007] A relief printing device, comprising a mounting frame, a printing roller rotatably mounted on the mounting frame, a roller ink roller arranged on one side of the printing roller, an abutting roller arranged on the other side of the printing roller, a transmission roller arranged between the roller ink roller and the printing roller, the transmission roller being capable of abutting with the roller ink roller, the transmission roller being capable of abutting with the printing roller, a driving mechanism mounted on the mounting frame for driving the roller ink roller and the transmission roller to rotate, a jacking piece mounted on the mounting frame for jacking up the transmission roller, a jacking track provided on the mounting frame for sliding cooperation with the transmission roller, and a first accommodating groove provided on the end portion of the jacking track close to the printing roller for clamping cooperation with the rotating shaft of the transmission roller.

[0008] By adopting the above technical scheme, when the printing roller needs to be replaced, the operator lowers the height of the transmission roller by using the jacking piece, so that the transmission roller leaves the first accommodating groove, the transmission roller moves away from the printing roller along the jacking track, then the operator disassembles and replaces the printing roller, and the ink moves away from the printing roller, thereby preventing the ink from splashing during the replacement process and reducing the pollution of the ink to the environment.

[0009] Preferably, the jacking piece comprises a jacking cylinder mounted on the mounting frame, and a jacking block fixedly connected to the piston rod of the jacking cylinder, the jacking block being capable of abutting with the rotating shaft of the transmission roller.

[0010] By adopting the technical scheme, the operator drives the lifting block to move by using the lifting cylinder, the lifting block drives the rotating shaft of the transmission roller to move along the lifting track, so that the rotating shaft of the ink transmission roller enters the first accommodating groove, and then the operator can conveniently install the ink transmission roller.

[0011] Preferably, rotating wheels are rotatably installed at both ends of the top surface of the lifting block, and the side of the rotating wheels close to each other can abut against the rotating shaft of the ink transmission roller.

[0012] By adopting the technical scheme, the rotating shaft of the ink transmission roller can be clamped between the two rotating wheels, and the rotation of the rotating wheels reduces the friction between the rotating shaft of the ink transmission roller and the lifting block, preventing the rotating shaft of the ink transmission roller from being worn.

[0013] Preferably, an ink cartridge body is slidably arranged on the mounting frame, an accommodating cavity for accommodating the ink roller and the ink transmission roller is formed in the ink cartridge body, a bearing is fixedly sleeved on the rotating shaft of the ink roller, a second accommodating groove for clamping the bearing is formed in the inner wall of the accommodating cavity, a clamping piece for fixing the bearing is arranged on the ink cartridge body, and a third accommodating groove for clamping the rotating shaft of the ink transmission roller is formed in the inner wall of the accommodating cavity.

[0014] By adopting the technical scheme, the operator puts the ink roller into the ink cartridge body, then fixes the ink roller by using the clamping piece, puts the ink transmission roller into the ink cartridge body, and makes the rotating shaft of the ink transmission roller enter the third accommodating groove, pushes the ink cartridge body to make the rotating shaft of the ink transmission roller enter the lifting track, then drives the rotating shaft of the ink transmission roller to reach the position of the first accommodating groove by using the lifting cylinder, and then pushes the ink cartridge body to make the rotating shaft of the ink transmission roller enter the first accommodating groove, thereby facilitating the operator to use the printing equipment; when the printing roller needs to be replaced, the operator pulls the ink cartridge body, the movement of the ink cartridge body makes the side wall of the third accommodating groove drive the rotating shaft of the ink transmission roller away from the first accommodating groove, thereby facilitating the operator to replace the ink transmission roller and the ink roller, and the arrangement of the ink cartridge body prevents ink leakage and reduces the pollution of the environment by ink.

[0015] Preferably, the clamping piece comprises a fixed screw penetrating through the ink cartridge body and a fixed disc fixedly connected to the end of the fixed screw penetrating out of the ink cartridge body, the fixed screw is in threaded cooperation with the ink cartridge body, the end of the fixed screw away from the knob can penetrate into the second accommodating groove, and the fixed screw can abut against the bearing.

[0016] By adopting the technical scheme, the operator rotates the fixed disc, the rotation of the fixed disc drives the rotation of the fixed screw, and the rotation of the fixed screw makes the fixed screw abut against the bearing, thereby facilitating the operator to fix the ink roller.

[0017] Preferably, the second accommodating groove is fixedly connected with an abutting block on the inner wall of the fixed screw, an abutting rod is slidably arranged on the abutting block, an abutting sliding groove is formed on the abutting block for sliding cooperation with the abutting rod, and an abutting spring is fixedly connected with the abutting rod, and the end of the abutting spring away from the abutting rod is fixedly connected with the inner end surface of the abutting sliding groove.

[0018] By adopting the above technical scheme, the operator rotates the fixed disc, the fixed disc drives the fixed screw to abut against the bearing, the bearing drives the abutting rod to move, the movement of the abutting rod causes the abutting spring to be in a compressed state, so that the abutting rod abuts against the bearing under the action of the abutting spring.

[0019] Preferably, the ink cartridge body is fixedly connected with a positioning block, a limiting plate is slidably sleeved on the positioning block, a limiting sliding groove is formed on the limiting plate for sliding cooperation with the positioning block, and the positioning block is provided with a positioning assembly for fixing the limiting plate.

[0020] By adopting the above technical scheme, the operator moves the limiting plate, the movement of the limiting plate causes the limiting plate to close the second accommodating groove, then the operator fixes the limiting plate by using the positioning assembly, thereby locking the bearing on the ink roller, and the operator can conveniently install and dismount the ink roller.

[0021] Preferably, the positioning assembly comprises a positioning screw rod penetrating through the positioning block, a positioning disc sleeved on the positioning screw rod, and a knob fixedly connected with the positioning screw rod and penetrating out of the positioning block, one side of the positioning disc can abut against the limiting plate, and the other side of the positioning disc can abut against the knob.

[0022] By adopting the above technical scheme, the operator rotates the knob, the rotation of the knob drives the positioning screw rod to rotate, the rotation of the positioning screw rod causes the knob to drive the positioning disc to abut against the limiting plate, thereby fixing the limiting plate, and the operator can conveniently dismount and install the ink roller.

[0023] Preferably, the mounting frame is fixedly connected with a supporting plate, an ink cartridge base is slidably arranged on the supporting plate, the ink cartridge body is slidably arranged on the ink cartridge base, a dovetail block is mounted on the bottom surface of the ink cartridge base, and a first dovetail groove is formed on the supporting plate for sliding cooperation with the dovetail block.

[0024] By adopting the above technical scheme, the operator pulls the ink cartridge body, the ink cartridge body drives the dovetail block to slide on the first dovetail groove, thereby facilitating the operator to pull out the ink cartridge body to replace the ink roller and the ink transmission roller.

[0025] Preferably, a second dovetail groove is formed on the ink cartridge base for sliding cooperation with the dovetail block.

[0026] By adopting the above technical scheme, the use of the second dovetail groove increases the distance of the ink box body extraction, thereby making it more convenient for the operator to replace the ink roller and the ink transfer roller.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. When the printing roller needs to be replaced, the operator lowers the height of the ink transfer roller by using the jacking member, so that the ink transfer roller leaves the first containing groove, the ink transfer roller moves away from the printing roller along the jacking track, then the operator disassembles and replaces the printing roller, and the ink moves away from the printing roller, thereby preventing the ink from splashing during the replacement process and reducing the pollution of the environment by the ink.

[0029] 2. The operator places the rolling roller into the ink box body, then fixes the rolling roller by using the clamping member, places the ink transfer roller into the ink box body, and the rotating shaft of the ink transfer roller enters the third containing groove, then pushes the ink box body so that the rotating shaft of the ink transfer roller enters the jacking track, and then uses the jacking cylinder to drive the rotating shaft of the ink transfer roller to the position of the first containing groove, and then pushes the ink box body so that the rotating shaft of the ink transfer roller enters the first containing groove, thereby facilitating the operator to use the printing equipment; when the printing roller needs to be replaced, the operator pulls the ink box body, and the movement of the ink box body causes the side wall of the third containing groove to drive the rotating shaft of the ink transfer roller away from the first containing groove, thereby facilitating the operator to replace the ink transfer roller and the ink roller, and the setting of the ink box body prevents the ink from leaking, thereby reducing the pollution of the environment by the ink.

[0030] 3. The operator pulls the ink box body, and the ink box body drives the dovetail block to slide on the first dovetail groove, thereby facilitating the operator to extract the ink box body to replace the ink roller and the ink transfer roller. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structure schematic view of a letterpress printing device of an embodiment of the present application.

[0032] Figure 2 is Figure 1 is an enlarged schematic view of position A in FIG. 1.

[0033] Figure 3 is a schematic view of the internal structure of the abutting block of an embodiment of the present application.

[0034] Figure 4 is a schematic view of the internal structure of the positioning block of an embodiment of the present application.

[0035] Figure 5 is Figure 1 is an enlarged schematic view of position B in FIG. 1.

[0036] MARKED FOR REFERENCE:

[0037] 1, mounting frame; 11, printing roller; 12, ink roller; 13, abutting roller; 14, ink transmission roller; 15, driving mechanism; 16, jacking track; 17, first containing groove; 2, jacking piece; 21, jacking cylinder; 22, jacking block; 23, rotating wheel; 3, ink box body; 31, containing cavity; 32, bearing; 33, second containing groove; 34, third containing groove; 35, support plate; 36, ink box base; 37, dovetail block; 38, first dovetail groove; 39, second dovetail groove; 4, clamping piece; 41, fixed screw rod; 42, fixed disc; 43, abutting block; 44, abutting rod; 45, abutting sliding groove; 46, abutting spring; 47, positioning block; 48, limiting plate; 49, limiting sliding groove; 5, positioning assembly; 51, positioning screw rod; 52, positioning disc; 53, knob. DETAILED DESCRIPTION

[0038] The following will be described in detail with reference to the accompanying drawings Figures 1-5 The application is further described in detail.

[0039] The embodiment of the application discloses a relief printing device. Referring to Figure 1 , the relief printing device comprises a mounting frame 1, the mounting frame 1 is vertically arranged, a printing roller 11 is arranged on the top of the mounting frame 1, the printing roller 11 is horizontally arranged, and the printing roller 11 is rotationally arranged on the mounting frame 1. An abutting roller 13 is arranged on one side of the mounting frame 1, the abutting roller 13 is horizontally arranged, the abutting roller 13 is rotationally arranged on the mounting frame 1, and the abutting roller 13 can abut against the printing roller 11.

[0040] Referring to Figure 1 , a support plate 35 is arranged on the side, away from the abutting roller 13, of the mounting frame 1, the support plate 35 is in a rectangular plate shape, the support plate 35 is horizontally arranged, and an ink box base 36 is slidingly arranged on the support plate 35. The ink box base 36 is horizontally arranged, a dovetail block 37 is arranged on the bottom surface of the ink box base 36, and a second dovetail groove 39 is arranged on the ink box base 36 and used for sliding cooperation with the dovetail block 37. The dovetail block 37 is horizontally arranged, the dovetail block 37 is slidingly arranged on the support plate 35, a first dovetail groove 38 is arranged on the support plate 35 and used for sliding cooperation with the dovetail block 37. An operator pulls the ink box body 3, the ink box body 3 drives the dovetail block 37 to slide on the first dovetail groove 38, and the use of the second dovetail groove 39 increases the distance at which the ink box body 3 is pulled out, thereby facilitating the operator to pull out the ink box body 3 to replace the ink roller 12 and the ink transmission roller 14.

[0041] Referring to Figure 1 , Figure 2The ink cartridge body 3 is arranged on the ink cartridge base 36, and the ink cartridge body 3 is horizontally arranged and slidably arranged on the ink cartridge base 36. The ink cartridge body 3 is provided with a rolling ink roller 12 and a ink transferring roller 14. The ink cartridge body 3 is provided with a containing cavity 31 for containing the rolling ink roller 12 and the ink transferring roller 14. The rolling ink roller 12 is horizontally arranged in the ink cartridge body 3. A bearing 32 is fixedly arranged on a rotating shaft of the rolling ink roller 12. The ink cartridge body 3 is provided with a second containing groove 33 for clamping the bearing 32.

[0042] With reference to Figure 1 , Figure 2 The ink cartridge body 3 is provided with a clamping piece 4 for fixing the rolling ink roller 12. The clamping piece 4 comprises a fixed screw rod 41 and a fixed disc 42. The fixed screw rod 41 is horizontally arranged and penetrates the ink cartridge body 3. The fixed screw rod 41 is in threaded connection with the ink cartridge body 3. The end of the fixed screw rod 41 penetrating into the second containing groove 33 can abut against the bearing 32. The fixed disc 42 is vertically arranged and arranged on the end of the fixed screw rod 41 away from the bearing 32. The fixed disc 42 is fixedly connected with the fixed screw rod 41. The operator rotates the fixed disc 42. The fixed disc 42 drives the fixed screw rod 41 to rotate. The rotation of the fixed screw rod 41 makes the fixed screw rod 41 abut against the bearing 32, thereby facilitating the operator to fix the rolling ink roller 12.

[0043] With reference to Figure 2 , Figure 3 The side wall of the second containing groove 33 is provided with an abutting block 43. The abutting block 43 is arranged on the side of the bearing 32 away from the fixed screw rod 41. The abutting block 43 is fixedly connected with the inner wall of the second containing groove 33. The abutting block 43 is provided with an abutting rod 44. The abutting rod 44 is slidably arranged on the abutting block 43. The abutting block 43 is provided with an abutting sliding groove 45 for slidingly connecting with the abutting rod 44. The abutting rod 44 is provided with an abutting spring 46. The abutting spring 46 is horizontally arranged. One end of the abutting spring 46 is fixedly connected with the abutting rod 44. The other end of the abutting spring 46 is fixedly connected with the inner end face of the abutting sliding groove 45. The operator rotates the fixed disc 42. The fixed disc 42 drives the fixed screw rod 41 to abut against the bearing 32. The bearing 32 drives the abutting rod 44 to move. The movement of the abutting rod 44 makes the abutting spring 46 in a compressed state, thereby making the abutting rod 44 abut against the bearing 32 under the action of the abutting spring 46.

[0044] With reference to Figure 2 , Figure 4The limiting plate 48 is arranged on the ink cartridge body 3, the limiting plate 48 is horizontally arranged, the limiting plate 48 is arranged on the opening of the second accommodating groove 33, and the limiting plate 48 can abut against the top of the bearing 32. The positioning block 47 is arranged on the ink cartridge body 3, the positioning block 47 is in a rectangular block shape, the positioning block 47 is horizontally arranged, and the positioning block 47 is fixedly connected with the ink cartridge body 3. The positioning block 47 is slidably arranged on the limiting plate 48, the limiting plate 48 is provided with a limiting sliding groove 49, and the inner wall of the limiting sliding groove 49 is in sliding fit with the side wall of the positioning block 47.

[0045] With reference to Figure 2 , Figure 4 The positioning block 47 is provided with a positioning assembly 5 for fixing the limiting plate 48, the positioning assembly 5 comprises a positioning screw 51, a positioning disc 52 and a knob 53. The positioning screw 51 is vertically arranged, the positioning screw 51 is arranged on the positioning block 47 in a threaded manner, the positioning disc 52 is horizontally arranged, the positioning disc 52 is sleeved on the positioning screw 51, and the positioning disc 52 can abut against the limiting plate 48. The knob 53 is fixedly connected to the end of the positioning screw 51 away from the positioning block 47, and the side wall of the positioning disc 52 away from the limiting plate 48 can abut against the knob 53.

[0046] The operator moves the limiting plate 48, the limiting plate 48 is moved to close the second accommodating groove 33, then the operator rotates the knob 53, the knob 53 drives the positioning screw 51 to rotate, the positioning screw 51 is rotated to drive the positioning disc 52 to abut against the limiting plate 48, so that the bearing 32 on the ink roller 12 is locked, and the operator can conveniently install and disassemble the ink roller 12.

[0047] With reference to Figure 1 , Figure 5 The ink transfer roller 14 is horizontally arranged, the ink transfer roller 14 is arranged between the ink roller 12 and the printing roller 11, the ink transfer roller 14 is arranged in the ink cartridge body 3, and the inner wall of the accommodating cavity 31 is provided with a third accommodating groove 34 for clamping fit with the rotating shaft of the ink transfer roller 14. The installation frame 1 is provided with a driving mechanism 15 for driving the ink roller 12 and the ink transfer roller 14 to rotate, the installation frame 1 is provided with a jacking piece 2 for jacking up the ink transfer roller 14, and the jacking piece 2 comprises a jacking cylinder 21 and a jacking block 22. The jacking cylinder 21 is installed in the installation frame 1. The jacking block 22 is horizontally arranged, the jacking block 22 is arranged on the piston rod of the jacking cylinder 21, and the jacking block 22 is fixedly connected with the piston rod of the jacking cylinder 21.

[0048] With reference to Figure 1 , Figure 5The top surface of the jacking block 22 is rotatably provided with rotating wheels 23 at both ends, and the side of the rotating wheels 23 close to each other can abut against the rotating shaft of the ink transmission roller 14. The mounting frame 1 is provided with a jacking track 16 for sliding cooperation with the ink transmission roller 14, and the end of the jacking track 16 close to the printing roller 11 is provided with a first accommodating groove 17 for clamping cooperation with the rotating shaft of the ink transmission roller 14.

[0049] When the printing roller 11 needs to be replaced, the operator lowers the height of the ink transmission roller 14 by using the jacking part 2, so that the ink transmission roller 14 is away from the first accommodating groove 17, and the ink transmission roller 14 is away from the printing roller 11 along the jacking track 16, then the operator disassembles and replaces the printing roller 11, and the ink is away from the printing roller 11, thereby preventing the ink from splashing during the replacement process, and reducing the pollution of the ink to the environment.

[0050] The implementation principle of the relief printing device in the embodiment of the application is as follows: the operator puts the rolling roller into the ink box body 3, then the operator rotates the fixed disc 42, the fixed disc 42 drives the fixed screw 41 to rotate, the fixed screw 41 drives the bearing 32 to abut tightly under the action of the abutting spring 46, then the operator moves the limiting plate 48, the movement of the limiting plate 48 makes the limiting plate 48 close the second accommodating groove 33, the operator rotates the knob 53 to drive the positioning screw 51 to rotate, the rotation of the positioning screw 51 makes the knob 53 drive the positioning disc 52 to abut tightly with the limiting plate 48, so as to lock the bearing 32 on the ink roller 12.

[0051] The operator puts the ink transmission roller 14 into the ink box body 3, the rotating shaft of the ink transmission roller 14 enters the third accommodating groove 34, the operator pushes the ink box body 3, so that the rotating shaft of the ink transmission roller 14 enters the jacking track 16, then the operator drives the rotating shaft of the ink transmission roller 14 to reach the position of the first accommodating groove 17 by using the jacking cylinder 21, then the operator pushes the ink box body 3, so that the rotating shaft of the ink transmission roller 14 enters the first accommodating groove 17, thereby facilitating the operator to use the printing equipment.

[0052] When the printing roller 11 needs to be replaced, the operator pulls the ink box body 3, the movement of the ink box body 3 makes the side wall of the third accommodating groove 34 drive the rotating shaft of the ink transmission roller 14 to be away from the first accommodating groove 17, then the operator drives the rotating shaft of the ink transmission roller 14 to fall into the third accommodating groove 34 along the jacking track 16 by using the jacking cylinder 21, then the operator pulls the ink box body 3, so that the ink transmission roller 14 and the ink roller 12 extend out of the mounting frame 1, thereby facilitating the operator to replace the ink transmission roller 14 and the ink roller 12, and the setting of the ink box body 3 prevents the ink from leaking, thereby reducing the pollution of the ink to the environment.

[0053] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A letterpress printing apparatus, comprising a mounting frame (1), characterized in that: A printing roller (11) is rotatably mounted on the mounting frame (1). An ink roller (12) is provided on one side of the printing roller (11), and an abutment roller (13) is provided on the other side of the printing roller (11). An ink transfer roller (14) is provided between the ink roller (12) and the printing roller (11). The ink transfer roller (14) can abut against the ink roller (12) and the printing roller (11). A useful... The drive mechanism (15) that drives the ink roller (12) and the ink transfer roller (14) to rotate is provided. A lifting member (2) for lifting the ink transfer roller (14) is installed on the mounting frame (1). A lifting track (16) for sliding cooperation with the ink transfer roller (14) is provided on the mounting frame (1). A first receiving groove (17) for engaging with the rotating shaft of the ink transfer roller (14) is provided on the end of the lifting track (16) near the printing roller (11). The lifting component (2) includes a lifting cylinder (21) mounted on the mounting frame (1) and a lifting block (22) fixedly connected to the piston rod of the lifting cylinder (21). The lifting block (22) can abut against the rotating shaft of the ink transfer roller (14). The mounting bracket (1) is slidably mounted on an ink cartridge body (3). The ink cartridge body (3) has a receiving cavity (31) for accommodating the ink roller (12) and the ink transfer roller (14). A bearing (32) is fixedly sleeved on the rotating shaft of the ink roller (12). A second receiving groove (33) for engaging with the bearing (32) is provided on the inner wall of the receiving cavity (31). A clamping member (4) for fixing the bearing (32) is provided on the ink cartridge body (3). A third receiving groove (34) for engaging with the rotating shaft of the ink transfer roller (14) is provided on the inner wall of the receiving cavity (31).

2. The letterpress printing apparatus according to claim 1, characterized in that: The top surface of the lifting block (22) is rotatably mounted with rotating wheels (23) at both ends, and the side of the rotating wheels (23) that is close to each other can abut against the rotating shaft of the ink transfer roller (14).

3. The letterpress printing apparatus according to claim 1, characterized in that: The clamping member (4) includes a fixing screw (41) passing through the ink cartridge body (3) and a fixing disc (42) fixedly connected to the fixing screw (41) extending out of the end of the ink cartridge body (3). The fixing screw (41) is threadedly engaged with the ink cartridge body (3). The end of the fixing screw (41) away from the fixing disc (42) can be inserted into the second receiving groove (33). The fixing screw (41) can abut against the bearing (32).

4. The letterpress printing apparatus according to claim 3, characterized in that: An abutment block (43) is fixedly connected to the inner wall of the second receiving groove (33) away from the fixing screw (41). An abutment rod (44) is slidably passed through the abutment block (43). An abutment groove (45) is provided on the abutment block (43) for sliding cooperation with the abutment rod (44). An abutment spring (46) is fixedly connected to the abutment rod (44). The end of the abutment spring (46) away from the abutment rod (44) is fixedly connected to the inner end face of the abutment groove (45).

5. The letterpress printing apparatus according to claim 4, characterized in that: A positioning block (47) is fixedly connected to the ink cartridge body (3). A limiting plate (48) is slidably sleeved on the positioning block (47). A limiting groove (49) is provided on the limiting plate (48) for sliding cooperation with the positioning block (47). The positioning block (47) is provided with a positioning component (5) for fixing the limiting plate (48).

6. The letterpress printing apparatus according to claim 5, characterized in that: The positioning component (5) includes a positioning screw (51) passing through the positioning block (47), a positioning disc (52) sleeved on the positioning screw (51), and a knob (53) fixedly connected to the positioning screw (51) passing through the positioning block (47). One side of the positioning disc (52) can abut against the limiting plate (48), and the other side of the positioning disc (52) can abut against the knob (53).

7. The letterpress printing apparatus according to claim 1, characterized in that: A support plate (35) is fixedly connected to the mounting bracket (1). An ink cartridge base (36) is slidably disposed on the support plate (35). The ink cartridge body (3) is slidably disposed on the ink cartridge base (36). A dovetail block (37) is installed on the bottom surface of the ink cartridge base (36). A first dovetail groove (38) is provided on the support plate (35) for sliding cooperation with the dovetail block (37).

8. The letterpress printing apparatus according to claim 7, characterized in that: The ink cartridge base (36) is provided with a second dovetail groove (39) for sliding and engaging with the dovetail block (37).

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