Screen tensile testing machine

Abstract

The utility model discloses a screen stretching testing machine, and belongs to the technical field of screen stretching. The device mainly comprises a rack; two groups of support plates; two groups of guide rods are connected between the two groups of mounting plates, and sliding blocks are mounted on the guide rods in a sliding manner; a screw rod is mounted between the two groups of mounting plates through bearings, a driving part is mounted on one group of mounting plates, and the output end of the driving part is connected with the screw rod; a fixing plate is connected between the two sets of sliding blocks, a rotating rod is rotationally installed between the inner walls of the fixing plate, a rotating plate is installed on the rotating rod, a cleaning brush is installed on the rotating plate, and a sponge plate is installed on the rotating plate; a gear is installed on the rotating rod, an air cylinder is installed on the supporting plate, and a rack is installed at the output end of the air cylinder. According to the screen tensile testing machine, through the arrangement of the lead screw, the sliding block, the driving piece, the rotating rod, the gear, the fixed plate, the rotating plate, the cleaning brush, the sponge plate, the supporting rod, the clamping rod, the air cylinder and the rack, cleaning operation before screen tensile detection is achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of screen stretching, in particular to a screen stretching testing machine. BACKGROUND

[0002] The screen is also known as a silk screen printing plate, which is the core tool of silk screen printing. The screen is mainly composed of a silk screen, a screen frame and a photosensitive glue or a photosensitive film. The silk screen is the main part of the screen and plays a supporting role for ink and pattern formation. The silk screen material usually includes polyester silk screen, nylon silk screen and stainless steel silk screen. The screen frame is used to fix the silk screen and is generally made of wood, metal or plastic. The photosensitive glue or photosensitive film is coated on the silk screen and forms a printing pattern through exposure and development processes.

[0003] Screen stretching test is an important method for evaluating the mechanical properties of the screen, especially the tensile strength and elasticity of the screen silk screen part. Through the stretching test, it can be known whether the strength of the screen silk screen meets the printing requirements. In the silk screen printing process, the silk screen needs to bear a certain tension to maintain a tight state to ensure that the ink can uniformly pass through the silk screen to form a clear pattern. If the tensile strength of the silk screen is insufficient, the silk screen may relax and deform during printing, thereby affecting the printing precision and quality.

[0004] For example, the patent with publication number CN220322960U specifically discloses a material stretching testing machine, which comprises a base, a moving cross beam, a control box, a clamp, a stretching screw rod, a pressure sensor, a U-shaped frame, a mounting plate and a clamp. Thus, the two ends of the safety belt can be fixed conveniently and safely without winding around the clamp, thereby improving the efficiency of the safety belt stretching test.

[0005] The above-mentioned patent lacks cleaning before stretching the screen. If there are impurities on the surface of the screen, the tension data recorded by the tension sensor will fluctuate when the screen slides locally due to uneven friction during the stretching process. For example, in an ideal case without impurity interference, the tension increases uniformly, and the stress-strain curve changes regularly. However, with impurities, sudden tension drop may occur, causing deviation in stress calculation. Therefore, a screen stretching testing machine needs to be designed to solve the above-mentioned problems.

[0006] It should be noted that the above information disclosed in the background section of the present application is only used to understand the background technology of the concept of the present application, and therefore, it can contain information that does not constitute prior art. SUMMARY

[0007] Based on the above problems existing in the prior art, the problem to be solved by the present application is to provide a screen stretching testing machine, which solves the problem that the screen lacks cleaning before stretching in the above-mentioned patent, and if there is impurity on the surface of the screen, the tension data recorded by the tension sensor will fluctuate when the screen locally slides due to uneven friction during the stretching process. For example, in an ideal case without impurity interference, the tension is uniformly increased, and the stress-strain curve changes regularly. However, when there is impurity, sudden tension drop may occur, causing deviation in stress calculation.

[0008] The technical scheme adopted by the present application to solve the technical problem is a screen stretching testing machine, mainly comprising: a rack; two groups of support plates mounted on the rack; two groups of mounting plates mounted on the support plates, two groups of guide rods connected between the two groups of mounting plates, and sliding blocks slidingly mounted on the guide rods; a lead screw bearing-mounted between the two groups of mounting plates, the sliding blocks being in transmission connection with the lead screw; a driving member mounted on one of the mounting plates, the output end of the driving member being connected with the lead screw; a fixed plate connected between the two groups of sliding blocks, a rotating rod rotatably mounted between the inner walls of the fixed plate, a rotating plate mounted on the rotating rod, a cleaning brush mounted on the rotating plate, and a sponge plate mounted on the rotating plate; a gear mounted on the rotating rod; and a rack mounted on the support plate, the output end of the air cylinder being provided with the rack.

[0009] Further, long grooves are formed in the support plates for the movement of the sliding blocks, and the sliding blocks extend into the long grooves.

[0010] Further, two groups of support rods are mounted on the fixed plate, a clamping rod is mounted on the rotating rod, and a clamping groove is formed in the clamping rod.

[0011] Further, a magnet is mounted at the contact position of the clamping rod and the clamping groove.

[0012] Further, a clamp mechanism is mounted on the rack, the clamp mechanism comprising a fixed clamp block mounted on the rack, a clamping surface being formed on the fixed clamp block, a mounting seat being mounted on the fixed clamp block, a threaded rod being threadedly connected to the mounting seat, and a movable clamp block being bearing-connected to one end of the threaded rod.

[0013] The screen stretching testing machine provided by the present application realizes cleaning operation before screen stretching detection through the arrangement of the support plates, the mounting plates, the lead screw, the sliding blocks, the driving member, the rotating rod, the gear, the fixed plate, the rotating plate, the cleaning brush, the sponge plate, the support rods, the clamping rod, the clamping groove, the air cylinder and the rack, thereby improving the accuracy of screen stretching detection.

[0014] In addition to the above-described objects, features and advantages, the present application has other objects, features and advantages. The present application will become more fully understood from the following detailed description, taken in conjunction with the accompanying drawings, wherein: BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings are included to provide a further understanding of the present application, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present application and, together with the description, serve to explain the present application.

[0016] In the drawings:

[0017] Figure 1 It is a schematic diagram of the whole screen stretching testing machine in the present application;

[0018] Figure 2 It is an exploded view of Figure 1 ;

[0019] Figure 3 It is an enlarged view of point A of Figure 2 ;

[0020] Figure 4 It is an enlarged view of point B of Figure 2 ;

[0021] In the drawings, various reference numerals refer to various identical or similar parts.

[0022] 1, frame; 11, guide column; 12, top plate; 13, hydraulic cylinder; 14, moving cross beam; 2, clamp mechanism; 21, fixed clamp block; 22, mounting seat; 23, screw rod; 24, moving clamp block; 3, cleaning mechanism; 31, support plate; 32, mounting plate; 33, guide rod; 34, screw rod; 35, sliding block; 36, driving member; 37, rotating rod; 38, gear; 39, fixed plate; 310, rotating plate; 311, cleaning brush; 312, sponge plate; 313, support rod; 314, clamping rod; 315, clamping groove; 316, air cylinder; 317, rack. DETAILED DESCRIPTION

[0023] It should be noted that the embodiments and features in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0024] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present application.

[0025] As Figures 1-4 shown, the present application provides a screen tensile testing machine, which comprises a frame 1, four sets of guide columns 11 are installed on the frame 1, a top plate 12 is connected between the guide columns 11, a hydraulic cylinder 13 is fixedly installed on the top plate 12, and a moving cross beam 14 is fixedly installed on the telescopic end of the hydraulic cylinder 13, which is suitable for moving up and down with the telescopic end of the hydraulic cylinder 13;

[0026] A clamping mechanism 2 is installed on one side of the moving cross beam 14 close to the frame 1 and on the frame 1, which comprises a fixed clamping block 21 fixedly installed on the moving cross beam 14 and the frame 1, a clamping surface is included on the fixed clamping block 21, a mounting seat 22 is fixedly installed on the fixed clamping block 21, a screw rod 23 is threadedly connected to the mounting seat 22, and a moving clamping block 24 is bearing-connected to one end of the screw rod 23;

[0027] When the screw rod 23 is rotated, the screw rod 23 will move axially relative to the mounting seat 22, and as the screw rod 23 is rotated, the moving clamping block 24 gradually approaches the fixed clamping block 21, and finally the screen sample is tightly clamped between the two, ensuring that the screen sample will not loosen or slip during the subsequent stretching process, so that the tension can effectively act on the sample;

[0028] After the screen sample is clamped, the hydraulic cylinder 13 is started, and the telescopic end of the hydraulic cylinder 13 starts to stretch, so the moving cross beam 14 will move with the telescopic end of the hydraulic cylinder 13 since the moving cross beam 14 is fixedly installed on the telescopic end of the hydraulic cylinder 13. Four sets of guide columns 11 are installed on the frame 1, which guide the movement of the moving cross beam 14 and ensure that the moving cross beam 14 can only move linearly up and down along the guide columns 11;

[0029] When the moving cross beam 14 moves upward (or downward) under the drive of the hydraulic cylinder 13, since the two ends of the screen sample are fixed in the clamping mechanism 2 on the moving cross beam 14 and the clamping mechanism 2 on the frame 1 respectively, the screen sample will be elongated, thereby realizing the stretching process of the screen sample. During the entire stretching process, the guide columns 11 ensure the stability of the movement direction of the moving cross beam 14, so that the tension direction is always along the axial direction of the screen sample, avoiding the generation of lateral force to affect the accuracy of the test results, so that the tensile properties of the screen can be evaluated by measuring various parameters during the stretching process;

[0030] A cleaning mechanism 3 is installed on the frame 1. The cleaning mechanism 3 includes two sets of support plates 31 fixedly installed on the frame 1. A moving unit is installed on the support plates 31. The moving unit includes two sets of mounting plates 32 fixedly installed on the support plates 31. Two sets of guide rods 33 are fixedly connected between the two sets of mounting plates 32. A sliding block 35 is slidably installed on the guide rod 33. The sliding block 35 can move along the straight line direction of the guide rod 33.

[0031] A lead screw 34 is mounted on a bearing between two sets of mounting plates 32. The sliding block 35 is connected to the lead screw 34 in a transmission manner. A drive component 36 is fixedly mounted on one set of mounting plates 32. The drive component 36 can be a motor. The output end of the drive component 36 is connected to the lead screw 34. At the same time, a long groove (not shown in the figure) is opened on the support plate 31 for the sliding block 35 to move. The sliding block 35 extends into the long groove.

[0032] When the drive unit 36 ​​(motor) starts, the lead screw 34 also rotates. Since the lead screw 34 and the sliding block 35 are connected by a transmission, the sliding block 35 will move along the axial direction of the lead screw 34 during its rotation, according to the transmission principle of the lead screw 34. At the same time, the guide rod 33 guides and restricts the movement of the sliding block 35, ensuring that the sliding block 35 can only move smoothly along the straight line of the guide rod 33, and preventing it from deviating or wobbling during the movement.

[0033] A fixed plate 39 is connected between two sets of sliding blocks 35. A rotating rod 37 is rotatably installed between the inner walls of the fixed plate 39. A rotating plate 310 is fixedly installed on the rotating rod 37. A cleaning brush 311 is fixedly installed on the rotating plate 310 near one end. A sponge plate 312 is fixedly installed on the rotating plate 310 near the other end.

[0034] A gear 38 is fixedly installed on the rotating rod 37. A cylinder 316 is fixedly installed on the support plate 31 near the gear 38. A rack 317 is fixedly installed at the output end of the cylinder 316. The rack 317 consists of a large section of smooth surface and a small section of tooth block. In the initial state, the gear 38 is located at the smooth surface of the rack 317.

[0035] Two sets of support rods 313 are fixedly installed on the fixed plate 39, and a locking rod 314 is fixedly installed on the rotating rod 37. The locking rod 314 has a slot 315 that is adapted to the top of the rotating rod 37. The locking rod 314 is adapted to rotate with the rotating rod 37 so that the locking rod 314 is engaged with the support rod 313 through the slot 315 to support the rotating rod 37, so that the cleaning brush 311 and the sponge plate 312 are placed horizontally, and the cleaning brush 311 contacts the screen surface first.

[0036] The magnet installed at the contact position of the clamping rod 314 and the clamping slot 315 makes the cleaning brush 311 and the sponge plate 312 horizontally placed stable;

[0037] In the initial state, the rotating rod 37 is matched with the supporting rod 313 through the fixed clamping rod 314 and the opened clamping slot 315. The clamping rod 314 is clamped on the supporting rod 313, and the magnet is installed at the contact position of the clamping rod 314 and the clamping slot 315. These magnets attract each other, providing additional attractive force for the rotating rod 37, so that the clamping rod 314 is more firmly clamped on the supporting rod 313. The action of this magnetic force ensures the stable support of the rotating rod 37, and further ensures that the rotating plate 310 installed on the rotating rod 37 is in a stable horizontal state, so that the cleaning brush 311 and the sponge plate 312 are horizontally placed. At the same time, since the cleaning brush 311 first contacts the screen surface, it can uniformly contact the screen surface in this stable horizontal state, preparing for the subsequent cleaning work. Moreover, the gear 38 is located at the smooth surface position of the rack 317, so that the gear 38 will not mesh with the toothed block part of the rack 317, and the rotating rod 37 is not affected by the rack 317, ensuring the stability of the initial static state of the entire cleaning mechanism 3.

[0038] When the driving member 36 (such as a motor) drives the screw rod 34 to rotate, the sliding block 35 will move linearly along the guide rod 33. Since the fixed plate 39 is connected between the two groups of sliding blocks 35, the fixed plate 39 will move along the guide rod 33 together with the sliding blocks 35. Since the rotating rod 37 is installed between the inner walls of the fixed plate 39, the rotating plate 310 is fixed on the rotating rod 37, and the cleaning brush 311 and the sponge plate 312 are installed on the rotating plate 310, so the cleaning brush 311 and the sponge plate 312 will move in the horizontal direction with the movement of the sliding block 35.

[0039] During the horizontal movement, the cleaning brush 311 will clean the screen surface. The cleaning brush 311 uses the characteristics of its bristles to brush off the dust, debris and other impurities on the screen surface, so that they are separated from the screen surface. Through the continuous movement of the sliding block 35, the cleaning brush 311 will sweep through different areas of the screen surface, achieving the preliminary cleaning of the screen.

[0040] When the cleaning brush 311 moves to the top end close to the screen with the sliding block 35, the gear 38 fixedly installed on the rotating rod 37 engages with the tooth block on the rack 317 and rotates 180 degrees, at this time, the sponge plate 312 rotates horizontally with the cleaning brush 311, so that the sponge plate 312 is in contact with the surface of the screen, at the same time, the rotating rod 37 synchronously drives the clamping rod 314 to rotate, so that the magnet at the contact position of the clamping slot 315 and the top end of the supporting rod 313 is attracted to each other, generating additional attractive force, enhancing the clamping effect of the clamping rod 314 and the supporting rod 313, providing stable support for the rotating rod 37, at this time, the cleaning agent can be sprayed on the sponge plate 312, and then the air cylinder 316 is started. The output end of the air cylinder 316 pushes the rack 317 to move, so that the tooth block on the rack 317 is away from the gear 38, and then the driving part 36 is started again to drive the screw rod 34 to rotate, so as to drive the sliding block 35 to indirectly drive the sponge plate 312 to wipe the surface of the screen, realizing that when the driving part 36 drives the rotating rod 37 to move upward, the cleaning brush 311 is in contact with the screen to clean the surface, and when the driving part 36 drives the rotating rod 37 to move downward, the sponge plate 312 is in contact with the screen to wipe the surface, so as to remove the dust particles, oil stains or other small impurities remaining on the surface of the screen.

[0041] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A screen tensile tester characterized by: Include: Frame (1); Two groups of support plates (31) are installed on the frame (1); Two groups of mounting plates (32) are installed on the support plates (31), and two groups of guide rods (33) are connected between the two groups of mounting plates (32), and the sliding blocks (35) are slidingly installed on the guide rods (33); The lead screw (34) is bearing mounted between the two groups of mounting plates (32), the sliding block (35) is in driving connection with the lead screw (34), one group of mounting plates (32) is provided with a driving member (36), and the output end of the driving member (36) is connected with the lead screw (34); Two groups of the sliding block (35) are connected with the fixed plate (39), the rotating rod (37) is rotatably installed between the inner walls of the fixed plate (39), the rotating plate (310) is installed on the rotating rod (37), the cleaning brush (311) is installed on the rotating plate (310), and the sponge plate (312) is installed on the rotating plate (310); The rotating rod (37) is provided with a gear (38), and the support plate (31) is provided with a pneumatic cylinder (316), and the pneumatic cylinder (316) is provided with a rack (317).

2. A screen tensile testing machine according to claim 1, characterized in that: The support plate (31) is provided with a long slot for the movement of the sliding block (35), and the sliding block (35) extends into the long slot.

3. A screen tensile testing machine according to claim 2, wherein: The fixed plate (39) is provided with two groups of supporting rods (313), the rotating rod (37) is provided with a clamping rod (314), and the clamping rod (314) is provided with a clamping groove (315).

4. A screen tensile testing machine according to claim 3, wherein: The contact position of the clamping rod (314) and the clamping groove (315) is provided with a magnet.

5. An apparatus according to claim 4, wherein: The frame (1) is provided with a clamp mechanism (2), the clamp mechanism (2) comprises a fixed clamp block (21) installed on the frame (1), the fixed clamp block (21) comprises a clamping surface, the fixed clamp block (21) is provided with a mounting seat (22), the mounting seat (22) is provided with a screw rod (23), one end of the screw rod (23) is bearing connected with a movable clamp block (24).

Images