Printing machine scraper

Abstract

The printing machine scraper comprises a scraper rest body and a sliding shaft, a mounting slope is arranged on the side, facing the working direction, of the scraper rest body, and a scraper body is arranged on the section, close to the surface of a workpiece, of the mounting slope; pressure frames are arranged on the two end faces, in the length direction of the tool rest body, of the tool rest body in a sliding mode. The sliding direction of the pressure frame is consistent with the width direction of the mounting slope; the sliding shaft is positioned on one side of the scraper towards the knife rest main body moving direction; two ends of the sliding shaft are respectively connected with the pressure frames on the two end surfaces; a solder paste check block is arranged on the sliding shaft in a sliding manner, and one side of the solder paste check block abuts against the scraper; a first elastic piece is arranged on the tool rest body, the first elastic piece elastically abuts against the pressure frame so that the pressure frame can have the trend of moving towards the surface of the workpiece along the installation inclined face, when the tool rest faces the workpieces of different sizes, the positions of the solder paste check blocks on the sliding shaft can be adjusted, scrapers of specific sizes corresponding to the different workpieces can be simulated, and the tool rest can be conveniently used. And the solder paste waste phenomenon caused by frequent scraper replacement is avoided.

Description

Technical Field

[0001] The present application relates to the field of surface mounting technology, and in particular to a scraper for a printing machine. Background Art

[0002] Solder paste is widely used as a core auxiliary material in the electronics industry.

[0003] During the manufacturing process, the scraper length required for each product is optimally 2cm longer than the product being produced (the amount of solder paste added is just right, and there is no risk of scrapping the solder paste due to excessive exposure time due to adding too much solder paste). In reality, there are almost no scrapers that are completely compatible with the products being produced. They are all universal models, such as 250mm, 280mm, 300mm and 350mm. If the product length is 200mm, you need to choose a 250mm scraper to use with it. Therefore, in the existing model, it is usually necessary to replace the corresponding scraper for different products, resulting in low work efficiency and the solder paste on the scraper is easily wasted after replacement. Utility Model Content

[0004] The purpose of the present application is to provide a printing machine scraper to solve the problem that in the traditional mode, the scraper needs to be frequently replaced for different products, resulting in waste of solder paste and low work efficiency.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] A printing machine scraper comprises a tool holder body and a sliding shaft, wherein the tool holder body is provided with a mounting bevel on one side facing the working direction, and a scraper is provided at a section of the mounting bevel close to the workpiece surface; pressure frames are slidably provided on both end faces of the tool holder body along its own length direction; the sliding direction of the pressure frame is consistent with the width of the mounting bevel; the length direction of the sliding shaft is parallel to the length direction of the tool holder body, and the sliding shaft is located on the side of the scraper toward the movement direction of the tool holder body; the two ends of the sliding shaft are respectively connected to the pressure frames on the two end faces; a solder paste stopper is slidably provided on the sliding shaft, and one side of the solder paste stopper abuts against the scraper; a first elastic member is provided on the tool holder body, and the first elastic member elastically abuts against the pressure frame, so that the pressure frame has a tendency to move along the mounting bevel toward the workpiece surface.

[0007] Furthermore, a first sliding groove is provided on the end surface of the tool holder body, and the pressure frame includes a sliding rod, which is slidably arranged in the first sliding groove; a mounting hole is provided in the first sliding groove, and the end of the mounting hole facing away from the first sliding groove is connected to the outside of the first sliding groove, and a screw is screwed on the end of the mounting hole away from the first sliding groove; the first elastic member is located in the mounting hole, and one end of the first elastic member abuts against the screw, and the other end abuts against the side wall of the sliding rod.

[0008] Further, the pressure frame includes a connecting handle, one end of the connecting handle is connected to the sliding rod, and a second sliding groove is provided on the side of the connecting handle connected to the sliding rod away from the end of the sliding rod, the length direction of the second sliding groove is perpendicular to the mounting inclined surface, and a sliding block is provided at the end of the sliding shaft, and the sliding block is slidably matched with the second sliding groove; a connecting hole is provided on the end surface of the end of the connecting handle away from the sliding rod, the connecting hole is connected with the second sliding groove, a top screw is screwed in the connecting hole, and a second elastic member is provided in the connecting hole, one end of the second elastic member abuts the sliding block, and the other end abuts the top screw.

[0009] Furthermore, the sliding shaft is provided with a limiting ring groove, the number of the limiting ring grooves is multiple, and the multiple limiting ring grooves are arranged at intervals along the axial direction of the sliding shaft.

[0010] Furthermore, a stop bar is provided on the outer peripheral wall of the sliding shaft, and the length direction of the stop bar is consistent with the length direction of the sliding shaft; the number of the stop bars is three, and the three stop bars are arranged at intervals along the circumference of the sliding shaft.

[0011] Furthermore, a mounting groove is provided at a section of the mounting inclined surface away from the workpiece surface, a gear is rotatably provided at the bottom of the mounting groove, a first rack and a second rack are slidably provided in the mounting groove, the first rack and the second rack are both meshed with the gear, the first rack is located on a side of the gear in the mounting groove close to the workpiece surface, and the second rack is located on a side of the gear in the mounting groove away from the workpiece surface; the first rack and the second rack are both slidably arranged along the length direction of the tool holder body; a plurality of clamping holes are provided on the first rack and the second rack at intervals along their respective length directions.

[0012] Furthermore, both of the two solder paste stoppers are provided with plugging holes, in which plugging rods are slidably plugged, and the plugging rods are plugged and matched with the clamping holes.

[0013] The beneficial effects of the present application are as follows: in the present application, when facing workpieces of different sizes, the position of the solder paste stopper on the sliding shaft can be adjusted to simulate scrapers of specific sizes corresponding to different workpieces, thereby avoiding the waste of solder paste caused by frequent replacement of scrapers, and also improving work efficiency; in addition, when the scraper is working, the solder paste stopper is tightly abutted against the scraper and the mounting bevel to ensure that the solder paste seeps out from the gap between the two; at the same time, the elastic effect of the first elastic member on the pressure frame makes the solder paste stopper adaptively and tightly abut the surface of the workpiece no matter what kind of up and down movement it faces, thereby avoiding the failure of the solder paste between the solder paste stopper and the workpiece surface, affecting the working effect of the scraper. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of this application;

[0015] Figure 2 yes Figure 1 A partial enlarged schematic diagram in the middle;

[0016] Figure 3 yes Figure 1 A partial enlarged schematic diagram of point B in the middle;

[0017] Figure 4 yes Figure 1 A partial enlarged schematic diagram of point C in the middle;

[0018] Figure 5 It is a cross-sectional view of the mounting hole in this application.

[0019] The names corresponding to the marks in the figure are:

[0020] 1. Tool holder body; 10. Mounting block; 11. First sliding groove; 12. Mounting hole; 120. First elastic member; 2. Sliding shaft; 20. Limiting ring groove; 21. Stop strip; 3. Scraper; 40. Connecting handle; 400. Second sliding groove; 41. Sliding rod; 42. Sliding block; 420. Second elastic member; 421. Connecting hole; 5. Solder paste stopper; 50. Plug rod; 6. Mounting groove; 60. Second rack; 61. First rack; 62. Gear; 7. Snap-in hole. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0022] like Figure 1-5 As shown, a printing machine scraper 3 includes a tool holder body 1 and a sliding shaft 2. A mounting bevel is provided on the side of the tool holder body 1 facing the working direction, and a scraper 3 is provided on a section of the mounting bevel close to the workpiece surface; pressure frames are slidably provided on both end faces of the tool holder body 1 along its own length direction; the sliding direction of the pressure frame is consistent with the width of the mounting bevel.

[0023] The tool holder body 1 has a certain length, and a mounting block 10 is provided on the top of the tool holder body 1 for connection with a printing press.

[0024] The side facing the working direction refers to the side in which the entire scraper 3 moves forward during operation; a section of the installation slope close to the workpiece surface is a section relatively close to the bottom of the entire installation slope. Specifically, a sinking groove is provided on this section, and the scraper 3 is installed in the sinking groove to ensure that a side wall of the scraper 3 facing the direction of movement after installation is completed is coplanar with the installation slope.

[0025] There are two pressure racks in total, which are respectively located on the two end faces of the tool holder body 1 in the length direction.

[0026] The length direction of the installation bevel is consistent with the length direction of the tool holder body 1, and the width direction of the installation bevel is the direction of one side of the installation bevel from the top to the bottom.

[0027] The length direction of the sliding shaft 2 is parallel to the length direction of the tool holder body 1, and the sliding shaft 2 is located on the side of the scraper 3 moving toward the tool holder body 1; the two ends of the sliding shaft 2 are respectively connected to the pressure frames on the two end surfaces; a solder paste stopper 5 is slidably provided on the sliding shaft 2, and one side of the solder paste stopper 5 abuts against the scraper 3.

[0028] The sliding shaft 2 is connected to the pressure frame, and the solder paste stopper 5 is located on the sliding shaft 2. When the pressure frame slides, the solder paste stopper 5 moves synchronously with the pressure frame.

[0029] The solder paste stopper 5 is in close contact with the scraper 3 and the mounting bevel to ensure that the solder paste seeps out from the gap between the two.

[0030] A first elastic member 120 is disposed on the tool holder body 1 , and the first elastic member 120 elastically abuts against the pressure frame, so that the pressure frame has a tendency to move along the installation inclined surface toward the surface of the workpiece.

[0031] When the scraper 3 is working, the fluctuation caused by the feedback from the workpiece surface will be reflected by the up and down movement of the solder paste stopper 5 along the mounting slope. In order to simultaneously ensure that the solder paste stopper 5 can also have a tight abutment with the workpiece surface, the elastic effect of the first elastic member 120 on the pressure frame makes the solder paste stopper 5 adaptively and tightly abut the workpiece surface no matter what kind of up and down movement it faces, thereby avoiding the failure of the solder paste between the solder paste stopper 5 and the workpiece surface, affecting the working effect of the scraper 3.

[0032] Therefore, when facing workpieces of different sizes, the position of the solder paste stopper 5 on the sliding shaft 2 can be adjusted to simulate the scraper 3 of the specific size corresponding to the different workpieces, thereby avoiding the waste of solder paste caused by frequent replacement of the scraper 3 and improving work efficiency.

[0033] In some further embodiments, the end surface of the tool holder body 1 is provided with a first sliding groove 11, and the pressure frame includes a sliding rod 41, which is slidably arranged in the first sliding groove 11; a mounting hole 12 is provided in the first sliding groove 11, and the end of the mounting hole 12 facing away from the first sliding groove 11 is connected to the outside of the first sliding groove 11, and a screw is optionally provided at the end of the mounting hole 12 away from the first sliding groove 11; the first elastic member 120 is located in the mounting hole 12, one end of the first elastic member 120 abuts against the screw, and the other end abuts against the side wall of the sliding rod 41.

[0034] Specifically, the first elastic frame is arranged in the mounting hole 12, and under the action of the sliding rod 41 and the screw, the first elastic member 120 is in a compressed state, so that the pressure frame always has a tendency to move obliquely downward.

[0035] In other embodiments, the first elastic member 120 may be a spring.

[0036] In some further embodiments, the pressure frame includes a connecting handle 40, one end of which is connected to the sliding rod 41, and a second sliding groove 400 is provided at one end away from the sliding rod 41 and on the side where the connecting handle 40 is connected to the sliding rod 41. The second sliding groove 400 is vertically installed with an inclined surface in the length direction, and a sliding block 42 is provided at the end of the sliding shaft 2, and the sliding block 42 is slidably matched with the second sliding groove 400; a connecting hole 421 is provided on the end surface of the end of the connecting handle 40 away from the sliding rod 41, and the connecting hole 421 is connected to the second sliding groove 400, and a top screw is screwed in the connecting hole 421, and a second elastic member 420 is provided in the connecting hole 421, and one end of the second elastic member 420 abuts against the sliding block 42, and the other end abuts against the top screw.

[0037] Exemplarily, the function of the second elastic member 420 is similar to that of the first elastic member 120, and is used to produce an elastic effect on the sliding shaft 2, so that the sliding shaft 2 has a tendency to approach the mounting bevel and the scraper 3, thereby ensuring that during the operation, the solder paste stopper 5 provided on the sliding shaft 2 can adaptively and elastically abut the mounting bevel and the scraper 3 to ensure sealing.

[0038] In addition, under the action of the second elastic member 420, when the operator adjusts the solder paste stopper 5, the solder paste stopper 5 can be appropriately moved away from the mounting bevel and the scraper 3. After the adjustment is completed, the second elastic member 420 is used to achieve tightness, thereby avoiding wear on the solder paste stopper 5 or the mounting bevel and the scraper 3 caused by mechanical contact.

[0039] In some other embodiments, the second elastic member 420 may be a second spring.

[0040] In some further embodiments, a limiting ring groove 20 is provided on the sliding shaft 2 , and the number of the limiting ring grooves 20 is multiple, and the multiple limiting ring grooves 20 are arranged at intervals along the axial direction of the sliding shaft 2 .

[0041] The limiting ring groove 20 is mainly used to increase the friction between the solder paste stopper 5 and the sliding shaft 2 so as to limit the axial movement of the solder paste stopper 5 along the sliding shaft 2 in a non-adjusted state as much as possible.

[0042] In some further embodiments, a stop bar 21 is provided on the outer peripheral wall of the sliding shaft 2, and the length direction of the stop bar 21 is consistent with the length direction of the sliding shaft 2; the number of the stop bars 21 is three, and the three stop bars 21 are arranged at intervals along the circumference of the sliding shaft 2.

[0043] The anti-rotation strip 21 is mainly used to prevent the solder paste stopper 5 sleeved on the sliding shaft 2 from rotating around the sliding shaft 2 to ensure that the solder paste stopper 5 abuts against the mounting bevel and the scraper 3 .

[0044] In some further embodiments, a mounting groove 6 is provided at a section of the mounting inclined surface away from the workpiece surface, a gear 62 is rotatably provided at the bottom of the mounting groove 6, a first rack 61 and a second rack 60 are slidably provided in the mounting groove 6, the first rack 61 and the second rack 60 are both meshed with the gear 62, the first rack 61 is located on the side of the gear 62 in the mounting groove 6 close to the workpiece surface, and the second rack 60 is located on the side of the gear 62 in the mounting groove 6 away from the workpiece surface; the first rack 61 and the second rack 60 are both slidably arranged along the length direction of the tool holder body 1; a plurality of snap-in holes 7 are provided on the first rack 61 and the second rack 60 at intervals along their respective length directions.

[0045] The first rack gear 61 and the second rack gear 60 are respectively located at the upper and lower sides of the gear 62 , and the first rack gear 61 and the second rack gear 60 are symmetrical with respect to the center of the gear 62 .

[0046] In some other embodiments, when the entire device is observed from a perspective perpendicular to the mounting slope, the first rack 61 is relatively located at the lower left of the mounting slot 6, and the second rack 60 is relatively located at the upper right.

[0047] In addition, in some other preferred embodiments, when the left end of the first rack 61 abuts against the left side of the mounting groove 6, the right end of the first rack 61 can still mesh with the gear 62, that is, the length of the first rack 61 should satisfy that any tooth on the first rack 61 can mesh with the gear 62 as much as possible; when the right end of the second rack 60 abuts against the right side of the mounting groove 6, the left end of the second rack 60 can still mesh with the gear 62, that is, the length of the second rack 60 should satisfy that any tooth on the second rack 60 can mesh with the gear 62 as much as possible.

[0048] In some further embodiments, both solder paste stoppers 5 are provided with plugging holes, in which plugging rods 50 are slidably plugged, and the plugging rods 50 are plugged and matched with the clamping holes 7 .

[0049] When the plug-in rods 50 in the two solder paste blocks 5 are pressed and plugged into the corresponding snap-in holes 7 on the first rack 61 and the second rack 60, moving any one of the solder paste blocks 5 can realize the synchronous movement of the two solder paste blocks 5. In addition, if the two solder paste blocks 5 are at the same position away from the gear 62 when plugged in, the two solder paste blocks 5 can be synchronously centered at the same time, which reduces the adjustment steps and improves efficiency.

[0050] It should be pointed out that the first rack 61 and the second rack 60 in the mounting groove 6 can slide smoothly due to the limitation of the design size.

[0051] In some other embodiments, a cover plate may be provided at the opening of the mounting slot 6. Of course, a narrow slot hole for accommodating the plug-in rod 50 is correspondingly provided on the cover plate, and the number is preferably two.

[0052] Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field belong to the protection scope of the present application.

Claims

1. A printing machine scraper, characterized in that: The tool holder body (1) comprises a tool holder main body (1) and a sliding shaft (2); a mounting bevel is provided on one side of the tool holder main body (1) facing the working direction, and a scraper (3) is provided on a section of the mounting bevel close to the workpiece surface; a pressure frame is slidably provided on both end faces of the tool holder main body (1) along its length direction; the sliding direction of the pressure frame is consistent with the width direction of the mounting bevel; the length direction of the sliding shaft (2) is parallel to the length direction of the tool holder main body (1), and the sliding shaft (2) is located on the side of the scraper (3) facing the movement direction of the tool holder main body (1); the two ends of the sliding shaft (2) are respectively connected to the pressure frames on the two end faces; a solder paste stopper (5) is slidably provided on the sliding shaft (2), and one side of the solder paste stopper (5) abuts against the scraper (3); a first elastic member (120) is provided on the tool holder main body (1), and the first elastic member (120) elastically abuts against the pressure frame, so that the pressure frame has a tendency to move along the mounting bevel toward the workpiece surface.

2. The printing machine scraper according to claim 1, characterized in that: The end surface of the tool holder body (1) is provided with a first sliding groove (11), and the pressure frame includes a sliding rod (41), and the sliding rod (41) is slidably arranged in the first sliding groove (11); a mounting hole (12) is provided in the first sliding groove (11), and the end of the mounting hole (12) facing away from the first sliding groove (11) is connected to the outside of the first sliding groove (11), and a screw is screwed on the end of the mounting hole (12) away from the first sliding groove (11); the first elastic member (120) is located in the mounting hole (12), one end of the first elastic member (120) abuts against the screw, and the other end abuts against the side wall of the sliding rod (41).

3. The printing machine scraper according to claim 2, characterized in that: The pressure frame comprises a connecting handle (40), one end of the connecting handle (40) is connected to the sliding rod (41), a second sliding groove (400) is provided at one end away from the sliding rod (41) and located on the side where the connecting handle (40) is connected to the sliding rod (41), the length direction of the second sliding groove (400) is perpendicular to the mounting inclined surface, a sliding block (42) is provided at the end of the sliding shaft (2), and the sliding block (42) is slidably matched with the second sliding groove (400); a connecting hole (421) is provided on the end surface of one end of the connecting handle (40) away from the sliding rod (41), the connecting hole (421) is connected with the second sliding groove (400), a top screw is screwed into the connecting hole (421), a second elastic member (420) is provided in the connecting hole (421), one end of the second elastic member (420) abuts against the sliding block (42), and the other end abuts against the top screw.

4. The printing machine scraper according to claim 1, characterized in that: The sliding shaft (2) is provided with a limiting ring groove (20), the limiting ring groove (20) is in plurality, and the plurality of limiting ring grooves (20) are arranged at intervals along the axial direction of the sliding shaft (2).

5. The printing machine scraper according to claim 1, characterized in that: A stop bar (21) is provided on the outer peripheral wall of the sliding shaft (2), and the length direction of the stop bar (21) is consistent with the length direction of the sliding shaft (2); the number of the stop bars (21) is three, and the three stop bars (21) are arranged at intervals along the circumference of the sliding shaft (2).

6. The printing machine scraper according to claim 1, characterized in that: A mounting groove (6) is provided at a section of the mounting inclined surface away from the workpiece surface, a gear (62) is rotatably provided at the bottom of the mounting groove (6), a first rack (61) and a second rack (60) are slidably provided in the mounting groove (6), the first rack (61) and the second rack (60) are both meshed with the gear (62), the first rack (61) is located on a side of the gear (62) in the mounting groove (6) close to the workpiece surface, and the second rack (60) is located on a side of the gear (62) in the mounting groove (6) away from the workpiece surface; the first rack (61) and the second rack (60) are both slidably provided along the length direction of the tool holder body (1); a plurality of snap-in holes (7) are provided on the first rack (61) and the second rack (60) at intervals along their respective length directions.

7. The printing machine scraper according to claim 6, characterized in that: Both solder paste stoppers (5) are provided with a plug-in hole, in which a plug-in rod (50) is slidably plugged, and the plug-in rod (50) is plug-fitted with the clamping hole (7).

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