CN112829439A

CN112829439A - Silk-screen printing equipment for tubular workpiece

Info

Publication number: CN112829439A
Application number: CN202110007780.2A
Authority: CN
Inventors: 张顺康
Original assignee: Nanjing Kamanqi Engineering Technology Co ltd
Current assignee: Nanjing Kamanqi Engineering Technology Co ltd
Priority date: 2021-01-05
Filing date: 2021-01-05
Publication date: 2021-05-25

Abstract

The invention relates to a silk-screen device for tubular workpieces, which comprises a base, a driving mechanism, a liquid injection mechanism and a limiting clamping mechanism, wherein the silk-screen device for tubular workpieces realizes the reciprocating movement of a movable rod through the driving mechanism, the movable rod drives the liquid injection mechanism to inject ink on a screen plate, the limiting clamping mechanism clamps the workpieces, and the movable rod drives the limiting clamping mechanism to move, so that the silk-screen printing is carried out on the outer walls of the workpieces. The service life of otter board has been improved, compares with current fixture, and this mechanism adopts flexible centre gripping, realizes the protection to the work piece.

Description

Silk-screen printing equipment for tubular workpiece

Technical Field

The invention relates to a silk-screen printing device for tubular workpieces.

Background

The silk screen printing refers to that a silk screen is used as a plate base, and a silk screen printing plate with pictures and texts is manufactured by a photosensitive plate making method, wherein the silk screen printing plate comprises five major elements: the screen printing plate comprises a screen printing plate body, a scraper plate, ink, a printing table and a printing stock, and printing is carried out by utilizing the basic principle that meshes of image-text parts of the screen printing plate body can be permeated by the ink and meshes of non-image-text parts can not be permeated by the ink. When printing, ink is poured into one end of the screen printing plate, a scraper plate is used for applying a certain pressure to the ink position on the screen printing plate, meanwhile, the scraper plate moves towards the other end of the screen printing plate at a constant speed, and the ink is extruded onto a printing stock from meshes of the image-text part by the scraper plate in the moving process.

The existing silk-screen printing equipment generally adopts rigid clamping for clamping workpieces, is easy to scratch the surfaces of the workpieces and even damages the workpieces, and generally needs a plurality of output ends for driving the addition of printing ink, the transmission of the workpieces and the printing, thereby consuming larger energy.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to overcome the defects of the prior art, the screen printing equipment for the tubular workpiece is provided.

The technical scheme adopted by the invention for solving the technical problems is as follows: a silk-screen printing device for tubular workpieces comprises a base, a support rod, a cross rod, a screen plate, a driving mechanism, a liquid injection mechanism and a limiting clamping mechanism, wherein the cross rod is arranged above the base through the support rod;

the driving mechanism comprises a motor, a driving shaft, a half gear, a first rotating gear, a fixed shaft, a wire coil, a pull rope, a moving rod and a first spring, wherein the motor is horizontally arranged on a support rod, the driving shaft is arranged on the motor, the half gear is sleeved on the driving shaft, the half gear is connected with the driving shaft in a key mode, the fixed shaft is arranged on one side of the driving shaft, the fixed shaft is parallel to the driving shaft, the first rotating gear is sleeved on the fixed shaft and connected with the fixed shaft in a key mode, the first rotating gear is meshed with the half gear, the wire coil is sleeved on the fixed shaft, the wire coil is connected with the fixed shaft in a key mode, the moving rod is arranged between a transverse rod and a base, sliding grooves are formed in the transverse rod and the base, two ends of the moving rod are respectively located in two sliding grooves, the moving, the other end of the pull rope is connected with the moving rod, the pull rope is wound on the wire coil, the first spring is arranged in the sliding groove, one end of the first spring can be connected with the moving rod, and the other end of the first spring is connected with the sliding groove;

the liquid injection mechanism comprises a box body, a rolling component and a liquid injection component, the box body is arranged on a cross rod, the rolling component is arranged on a moving rod and comprises a limiting block, a limiting shaft, a roller and a second spring, the moving rod is provided with a limiting groove, the limiting block is positioned in the limiting groove, the limiting block is in sliding connection with the limiting groove, the limiting shaft is arranged on the limiting block, the roller is sleeved on the limiting shaft and is connected with the limiting shaft, the second spring is arranged in the limiting groove, one end of the second spring is connected with the limiting groove, the other end of the second spring is connected with the limiting block, the liquid injection component comprises a sleeve, a piston rod, a third spring, a liquid inlet pipe, a liquid outlet pipe and a nozzle, the sleeve is arranged on a support rod, one end of the piston rod is positioned in the sleeve, and the other end of the piston rod extends out of the sleeve, the piston of the piston rod is hermetically connected with the sleeve, one end of the piston rod, which is positioned outside the sleeve, is connected with the moving rod, the third spring is arranged in the sleeve, one end of the third spring is connected with the sleeve, the other end of the third spring is connected with the piston of the piston rod, the liquid inlet pipe and the liquid outlet pipe are both arranged at the top of the sleeve, the sleeve is communicated with the interior of the box body through the liquid inlet pipe, the nozzle is arranged on the moving rod and is opposite to the screen plate, and the nozzle is communicated with the interior of the sleeve through the liquid outlet pipe;

the limiting and clamping mechanism comprises a limiting component and a clamping component, the limiting component comprises a fixed block, a positioning shaft, a fourth spring, a second rotary gear, a rack, a first magnet and a second magnet, the movable rod is provided with a positioning groove, the positioning block is positioned in the positioning groove, the positioning block is in sliding connection with the positioning groove, the positioning shaft is arranged on the positioning block, the fourth spring is arranged in the positioning groove, one end of the fourth spring is connected with the positioning groove, the other end of the fourth spring is connected with the positioning block, the fixed block is arranged between the base and the screen plate, the positioning shaft is abutted against the fixed block, the second rotary gear is sleeved on the positioning shaft, the second rotary gear is in key connection with the positioning shaft, the rack is arranged on one side of the second rotary gear, the rack is parallel to the second rotary gear, and the rack is meshed with the second rotary gear, the first magnet is arranged on the positioning block, the second magnet is arranged on the base, the second magnet is arranged at one end, far away from the moving rod, of the base, the second magnet is arranged under the fixed block and corresponds to the first magnet, the second magnet is attracted with the first magnet, the clamping assembly is arranged on the positioning shaft and comprises four clamping units, the included angle formed by two adjacent clamping units is 90 degrees, each clamping unit comprises a fixed pipe, a push rod, a clamping block and a fifth spring, the fixed pipe is arranged on the positioning shaft, one end of the push rod is arranged in the fixed pipe, the other end of the push rod extends out of the fixed pipe, the push rod is connected with the fixed pipe in a sliding mode, the fifth spring is arranged in the fixed pipe, one end of the fifth spring is connected with the fixed pipe, and the other end of the fifth spring is connected with the push rod, the clamping block is arranged at one end, located outside the fixed pipe, of the push rod, the section of the clamping block is arc-shaped, and the circle center of the arc-shaped section of the clamping block is located on the axis of the positioning shaft.

In order to realize automatic control, a PLC is arranged on the base, and the motor is electrically connected with the PLC.

In order to reduce friction, the locating shaft is provided with a pulley at one end abutted against the fixed block, and the pulley is connected with the fixed block in a rolling manner.

In order to enable the ink to only have an inlet pipe to enter the sleeve and then flow out of the outlet pipe, a one-way valve is arranged at the joint of the inlet pipe and the sleeve, and a one-way valve is arranged at the joint of the outlet pipe and the sleeve.

For carrying out better spacing to the removal of stopper, the both sides of stopper are equipped with the slider, the limiting groove is equipped with the bar groove, the slider is located the bar inslot, slider and bar groove sliding connection.

In order to better limit the movement of the positioning block, the two sides of the positioning block are provided with a position moving block, a position moving groove is arranged in the positioning groove, the position moving block is positioned in the position moving groove, and the position moving block is connected with the position moving groove in a sliding mode.

For better printing, the second spring is in a compressed state.

For better printing, the fourth spring is in a compressed state.

In order to facilitate the movement of the positioning shaft, chamfers are arranged at two ends of the fixing block.

In order to enable the liquid outlet pipe to move, the liquid outlet pipe is a hose.

The silk-screen printing device for the tubular workpiece has the advantages that the reciprocating movement of the moving rod is realized through the driving mechanism, the liquid injection mechanism is driven by the moving rod to inject ink into the screen plate, the workpiece is clamped through the limiting clamping mechanism, and the limiting clamping mechanism is driven by the moving rod to move, so that the outer wall of the workpiece is subjected to silk-screen printing, compared with the existing silk-screen printing device, the silk-screen printing device realizes the online supplement of the ink and the online silk-screen printing of the workpiece through the linkage of the driving mechanism, the liquid injection mechanism and the limiting clamping mechanism, adopts a pure mechanical structure, improves the stability and the service life of the device, compared with the existing liquid injection mechanism, the silk-screen printing device rolls the ink uniformly through the roller, improves the silk-screen printing effect, adopts flexible pressure, improves the service life of the screen plate, and compared with the existing clamping mechanism, the silk-screen printing device adopts flexible clamping, and the workpiece is protected.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural diagram of a screen printing apparatus for tubular workpieces according to the present invention;

FIG. 2 is a schematic structural diagram of a driving mechanism of the screen printing apparatus for tubular workpieces according to the present invention;

FIG. 3 is a schematic view of a connecting structure of a moving rod and a cross rod of the screen printing device for tubular workpieces of the present invention;

FIG. 4 is a schematic structural diagram of a liquid injection mechanism of the screen printing device for tubular workpieces, provided by the invention;

FIG. 5 is a schematic structural diagram of a clamping assembly of the screen printing device for tubular workpieces according to the present invention;

FIG. 6 is a schematic structural diagram of a limiting assembly of the screen printing device for tubular workpieces, provided by the invention;

FIG. 7 is a schematic structural diagram of a limiting assembly of the screen printing device for tubular workpieces, provided by the invention;

in the figure: 1. the automatic feeding device comprises a base, a support rod 2, a cross rod 3, a screen plate 4, a motor 5, a driving shaft 6, a half gear 7, a half gear 8, a first rotating gear 9, a fixed shaft 9, a wire coil 10, a pull rope 11, a moving rod 12, a first spring 13, a box 14, a limiting block 15, a limiting shaft 16, a roller 17, a second spring 18, a sleeve 19, a piston rod 20, a piston rod 21, a third spring 22, a liquid inlet pipe 23, a liquid outlet pipe 24, a nozzle 25, a fixed block 26, a positioning shaft 27, a fourth spring 28, a second rotating gear 29, a rack 30, a rack 31, a first magnet 32, a second magnet 33, a fixed pipe 34, a push rod 35, a clamping block 36, a fifth spring, a sliding block 37 and a walking block 38.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1, a screen printing device for tubular workpieces comprises a base 1, a support rod 2, a cross rod 3, a screen plate 4, a driving mechanism, a liquid injection mechanism and a limiting clamping mechanism, wherein the cross rod 3 is arranged above the base 1 through the support rod 2, the screen plate 4 is arranged on the support rod 2, the driving mechanism is arranged on the support rod 2, the liquid injection mechanism is arranged on the cross rod 3, and the limiting clamping mechanism is arranged on the base 1;

when the device uses, operation actuating mechanism, actuating mechanism drive annotates the liquid mechanism operation, sprays printing ink on otter board 4, presss from both sides tightly the work piece through spacing fixture, moves through the spacing fixture of actuating mechanism drive to make the work piece remove, thereby carry out the silk screen printing to the outside of work piece.

As shown in fig. 2-3, the driving mechanism includes a motor 5, a driving shaft 6, a half gear 7, a first rotating gear 8, a fixed shaft 9, a wire coil 10, a pulling rope 11, a moving rod 12 and a first spring 13, the motor 5 is horizontally disposed on the supporting rod 2, the driving shaft 6 is mounted on the motor 5, the half gear 7 is sleeved on the driving shaft 6, the half gear 7 is in key connection with the driving shaft 6, the fixed shaft 9 is disposed on one side of the driving shaft 6, the fixed shaft 9 is parallel to the driving shaft 6, the first rotating gear 8 is sleeved on the fixed shaft 9, the first rotating gear 8 is in key connection with the fixed shaft 9, the first rotating gear 8 is meshed with the half gear 7, the wire coil 10 is sleeved on the fixed shaft 9, the wire coil 10 is in key connection with the fixed shaft 9, the moving rod 12 is disposed between the cross rod 3 and the base 1, chutes are disposed, the two ends of the moving rod 12 are respectively positioned in the two sliding grooves, the moving rod 12 is connected with the sliding grooves in a sliding manner, one end of the pull rope 11 is connected with the wire coil 10, the other end of the pull rope 11 is connected with the moving rod 12, the pull rope 11 is wound on the wire coil 10, the first spring 13 is arranged in the sliding grooves, one end of the first spring 13 can be connected with the moving rod 12, and the other end of the first spring 13 is connected with the sliding grooves;

the motor 5 is operated, the motor 5 drives the driving shaft 6 to rotate, the driving shaft 6 drives the half gear 7 to rotate, when the half gear 7 is meshed with the first rotating gear 8, the half gear 7 drives the first rotating gear 8 to rotate, the first rotating gear 8 drives the fixed shaft 9 to rotate, the fixed shaft 9 drives the wire coil 10 to rotate, thereby winding the pulling rope 11 around the wire coil 10, so that the pulling rope 11 pulls the moving rod 12 to move, wherein both ends of the moving rod 12 are respectively positioned in the two sliding grooves, so that the moving rod 12 can only move along the axial direction of the chute, thereby limiting the movement of the moving rod 12, the moving rod 12 moves to drive the first spring 13 to stretch, the restoring force of the first spring 13 generates pulling force on the moving rod 12, when the half gear 7 is not meshed with the first rotating gear 8, the movable rod 12 is driven to move reversely by the restoring force of the first spring 13, and returns to the original position.

As shown in fig. 4, the liquid injection mechanism includes a box 14, a rolling assembly and a liquid injection assembly, the box 14 is disposed on the cross bar 3, the rolling assembly is disposed on the moving bar 12, the rolling assembly includes a limiting block 15, a limiting shaft 16, a roller 17 and a second spring 18, the moving bar 12 is provided with a limiting groove, the limiting block 15 is located in the limiting groove, the limiting block 15 is slidably connected with the limiting groove, the limiting shaft 16 is disposed on the limiting block 15, the roller 17 is sleeved on the limiting shaft 16, the roller 17 is connected with the limiting shaft 16 in a key manner, the second spring 18 is disposed in the limiting groove, one end of the second spring 18 is connected with the limiting groove, the other end of the second spring 18 is connected with the limiting block 15, the liquid injection assembly includes a sleeve 19, a piston rod 20, a third spring 21, a liquid inlet pipe 22, a liquid outlet pipe 23 and a nozzle 24, the sleeve 19 is disposed on the supporting rod 2, one end of the piston rod 20 is positioned in the sleeve 19, the other end of the piston rod 20 extends out of the sleeve 19, the piston of the piston rod 20 is hermetically connected with the sleeve 19, one end of the piston rod 20, which is positioned outside the sleeve 19, is connected with the moving rod 12, the third spring 21 is arranged in the sleeve 19, one end of the third spring 21 is connected with the sleeve 19, the other end of the third spring 21 is connected with the piston of the piston rod 20, the liquid inlet pipe 22 and the liquid outlet pipe 23 are both arranged at the top of the sleeve 19, the sleeve 19 is communicated with the interior of the box body 14 through the liquid inlet pipe 22, the nozzle 24 is arranged on the moving rod 12, the nozzle 24 is arranged right opposite to the screen plate 4, and the nozzle 24 is communicated with the interior of the sleeve 19 through the liquid outlet;

when the moving rod 12 moves towards the sleeve 19, the moving rod 12 presses the piston rod 20 to move, so that the space of the sealed cavity formed by the piston rod 20 and the sleeve 19 is reduced, ink in the sealed cavity flows into the nozzle 24 through the liquid outlet pipe 23 and is then ejected through the nozzle 24, the ink ejected from the nozzle 24 falls on the screen plate 4, at the moment, the second spring 18 is in a compressed state, the restoring force of the second spring 18 generates thrust on the limiting block 15 to generate thrust on the limiting shaft 16 for the limiting block 15, the limiting shaft 16 generates thrust on the roller 17 to enable the roller 17 to be attached to the screen plate 4, along with the movement of the moving rod 12, the moving rod 12 drives the limiting block 15 to move, the limiting block 15 drives the limiting shaft 16 to move, the limiting shaft 16 drives the roller 17 to move, so that the ink on the screen plate 4 is uniformly rolled through the roller 17, when the moving rod 12 moves reversely, the moving rod 12, thereby increasing the space of the sealed cavity, leading the ink in the box body 14 to flow into the sealed cavity through the liquid inlet pipe 22, and realizing the filling of the ink.

Here, the restoring force of the second spring 18 is used to generate a pushing force on the roller 17, so that the pressure generated by the roller 17 on the screen plate 4 is flexible, the abrasion of the screen plate 4 is reduced, and the screen plate 4 is protected.

Here, the one-way valve on the liquid inlet pipe 22 can only feed liquid but not discharge liquid, and the one-way valve on the liquid outlet pipe 23 can only discharge liquid but not feed liquid, so that the ink in the box body 14 can only pass through the liquid inlet pipe 22 to enter the sleeve 19, and then the liquid outlet pipe 23 flows out.

Stopper 15 removes drive slider 37 here and removes, and slider 37 is located the bar inslot to make slider 37 can only remove along the axis direction in bar groove, thereby carry out spacingly to slider 37's removal, thereby carry out better spacing to stopper 15's removal.

As shown in fig. 5-7, the limiting and clamping mechanism includes a limiting component and a clamping component, the limiting component includes a fixed block 25, a positioning block 26, a positioning shaft 27, a fourth spring 28, a second rotating gear 29, a rack 30, a first magnet 31 and a second magnet 32, the moving rod 12 is provided with a positioning slot, the positioning block 26 is located in the positioning slot, the positioning block 26 is slidably connected with the positioning slot, the positioning shaft 27 is disposed on the positioning block 26, the fourth spring 28 is disposed in the positioning slot, one end of the fourth spring 28 is connected with the positioning slot, the other end of the fourth spring 28 is connected with the positioning block 26, the fixed block 25 is disposed between the base 1 and the screen plate 4, the positioning shaft 27 abuts against the fixed block 25, the second rotating gear 29 is sleeved on the positioning shaft 27, the second rotating gear 29 is connected with the positioning shaft 27, the rack 30 is disposed on one side of the second rotating gear 29, the rack 30 is parallel to the second rotating gear 29, the rack 30 is meshed with the second rotating gear 29, the first magnet 31 is arranged on the positioning block 26, the second magnet 32 is arranged on the base 1, the second magnet 32 is arranged at one end, far away from the moving rod 12, of the base 1, the second magnet 32 is arranged under the fixing block 25, the second magnet and the first magnet 31 are correspondingly arranged, the second magnet 32 and the first magnet 31 are attracted, the clamping assembly is arranged on the positioning shaft 27 and comprises four clamping units, an included angle formed by two adjacent clamping units is 90 degrees, each clamping unit comprises a fixing pipe 33, a push rod 34, a clamping block 35 and a fifth spring 36, the fixing pipe 33 is arranged on the positioning shaft 27, one end of the push rod 34 is arranged in the fixing pipe 33, and the other end of the push rod 34 extends out of the fixing pipe 33, the push rod 34 is connected with the fixed pipe 33 in a sliding mode, the fifth spring 36 is arranged in the fixed pipe 33, one end of the fifth spring 36 is connected with the fixed pipe 33, the other end of the fifth spring 36 is connected with the push rod 34, the clamping block 35 is arranged at one end, located outside the fixed pipe 33, of the push rod 34, the cross section of the clamping block 35 is arc-shaped, and the circle center of the arc-shaped cross section of the clamping block 35 is located on the axis of the positioning shaft 27.

Pressing the clamping blocks 35 downwards to enable the clamping blocks 35 to approach each other, so that the clamping blocks 35 can be plugged into the sleeve 19 to sleeve the workpiece on the clamping blocks 35, then releasing the hand, at the moment, the fifth spring 36 is in a compressed state, the restoring force of the fifth spring 36 generates outward thrust on the push rod 34, the push rod 34 generates outward thrust on the clamping blocks 35, so that the clamping blocks 35 are abutted against the inner wall of the workpiece, so as to clamp the inner wall of the workpiece, at the moment, the fourth spring 28 is in a compressed state, the restoring force of the fourth spring 28 generates outward thrust on the positioning block 26, the outward thrust on the positioning shaft 26 generates outward thrust on the positioning shaft 27, the outward thrust on the positioning shaft 27 generates outward thrust on the second rotating gear 29, so that the second rotating gear 29 is meshed with the rack 30, along with the movement of the moving rod 12, the moving rod 12 drives the positioning block 26 to move, the positioning block 26 drives the positioning shaft 27 to move, the positioning shaft 27 drives the second rotating gear 29 to move, when the second rotating gear 29 is meshed with the rack 30, the second rotating gear 29 rotates, the second rotating gear 29 drives the positioning shaft 27 to rotate, the positioning shaft 27 drives the fixing pipe 33 to rotate, the fixing pipe 33 drives the push rod 34 to rotate, the push rod 34 drives the clamping block 35 to rotate, and under the action of friction force, the clamping block 35 drives the workpiece to rotate, so that the outer wall of the workpiece rotates on the screen plate 4, and the outer wall of the whole workpiece is printed.

Here, when the moving rod 12 moves toward the supporting rod 2, the positioning shaft 27 is located above the fixed block 25, and when the positioning shaft 27 moves to the other end of the fixed block 25 along with the movement of the positioning shaft 27, the first magnet 31 and the second magnet 32 are aligned at this time, the second magnet 32 generates attraction to the first magnet 31, so that the first magnet 31 moves toward the second magnet 32, so that the positioning block 26 moves toward the second magnet 32, so that the positioning shaft 27 moves below the fixed block 25, so that the clamping component on the positioning shaft 27 moves downward, so that the workpiece moves downward and is disengaged from the screen plate 4, and along with the reverse movement of the moving rod 12, the positioning shaft 27 moves in the reverse direction, so that the positioning shaft 27 moves below the fixed block 25 to the initial position, and at this time, the workpiece and the screen plate 4 are kept disengaged, when the moving rod 12 moves to the initial position, the first magnet 31 is not attracted by the second magnet 32, and the positioning block 26 moves upward to return to the initial position under the action of the restoring force of the fourth spring 28, so that the positioning shaft 27 moves to above the fixing block 25 again, and the second rotating gear 29 is engaged with the rack 30 again.

Here, the fifth springs 36 have the same elasticity, so that the pushing force on the clamping blocks 35 is kept the same, the axis of the workpiece is kept coaxial with the positioning shaft 27, the centering of the workpiece is realized, the outer wall of the workpiece is kept in the same abutting state with the screen 4, and the printing effect is improved.

Here, the positioning block 26 moves to drive the moving block 38 to move, and the moving block 38 is located in the moving groove, so that the movement of the moving block 38 is limited, and the movement of the positioning block 26 is better limited.

In order to realize automatic control, the base 1 is provided with a PLC, and the motor 5 is electrically connected with the PLC.

In order to reduce friction, a pulley is arranged at one end of the positioning shaft 27, which abuts against the fixed block 25, and the pulley is connected with the fixed block 25 in a rolling manner.

In order to enable the ink to only enter the sleeve 19 through the liquid inlet pipe 22 and then flow out from the liquid outlet pipe 23, a one-way valve is arranged at the joint of the liquid inlet pipe 22 and the sleeve 19, and a one-way valve is arranged at the joint of the liquid outlet pipe 23 and the sleeve 19.

For carrying out better spacing to the removal of stopper 15, the both sides of stopper 15 are equipped with slider 37, the spacing inslot is equipped with the bar groove, slider 37 is located the bar inslot, slider 37 and bar groove sliding connection.

In order to better limit the movement of the positioning block 26, the positioning blocks 38 are arranged on two sides of the positioning block 26, a positioning groove is formed in the positioning groove, the positioning blocks 38 are located in the positioning groove, and the positioning blocks 38 are connected with the positioning groove in a sliding mode.

For better printing, the second spring 18 is in a compressed state.

For better printing, the fourth spring 28 is in a compressed state.

In order to facilitate the movement of the positioning shaft 27, chamfers are arranged at both ends of the fixing block 25.

In order to enable the outlet pipe 23 to be movable, the outlet pipe 23 is a hose.

When the device is used, the driving mechanism is operated to realize the reciprocating movement of the moving rod 12, the liquid injection assembly is driven to operate by the movement of the moving rod 12, ink is sucked into the sleeve 19 and then sprayed on the screen plate 4, the ink on the screen plate 4 is rolled by the rolling assembly, the ink is uniformly distributed on the screen plate 4 to realize better printing effect, meanwhile, the restoring force of the second spring 18 generates thrust on the roller 17 to keep flexible pressure between the roller and the screen plate 4, the screen plate 4 is protected, the service life of the screen plate 4 is prolonged, the workpiece is centered and clamped by the clamping assembly, the abutting part of the workpiece and the screen plate 4 is uniformly kept, so that the printing effect is improved, meanwhile, the flexible clamping is adopted, the inner wall of the workpiece is prevented from being damaged by rigid clamping, the workpiece is protected, the movement of the clamping assembly is limited by the limiting assembly, through the rotation of second commentaries on classics gear 29 for work piece rotary motion makes the outer wall of work piece can both support with otter board 4 and lean on, thereby prints the outer wall of whole work piece, and after the printing was accomplished, through the suction of second magnet 32 and first magnet 31, makes work piece and otter board 4 break away from, then replies initial position, avoids the printing ink on the otter board 4 to cause the pollution to the work piece.

Compared with the prior art, the silk-screen printing device for the tubular workpiece realizes the reciprocating movement of the movable rod 12 through the driving mechanism, the movable rod 12 drives the liquid injection mechanism to inject the printing ink on the screen plate 4, the workpiece is clamped through the limiting clamping mechanism, and the movable rod 12 drives the limiting clamping mechanism to move, so that the silk-screen printing is carried out on the outer wall of the workpiece, compared with the prior silk-screen printing device, the silk-screen printing device realizes the online supplement of the printing ink and the online silk-screen printing of the workpiece through the linkage of the driving mechanism, the liquid injection mechanism and the limiting clamping mechanism, adopts a pure mechanical structure, improves the stability and the service life of the device, compared with the prior liquid injection mechanism, the silk-screen printing device rolls the printing ink uniformly through the roller 17, improves the silk-screen printing effect, adopts flexible pressure, improves the service life of the screen plate 4, compared with the prior clamping mechanism, the silk-screen printing device adopts flexible clamping, and the workpiece is protected.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The screen printing equipment for the tubular workpieces is characterized by comprising a base (1), a support rod (2), a cross rod (3), a screen plate (4), a driving mechanism, a liquid injection mechanism and a limiting and clamping mechanism, wherein the cross rod (3) is arranged above the base (1) through the support rod (2), the screen plate (4) is arranged on the support rod (2), the driving mechanism is arranged on the support rod (2), the liquid injection mechanism is arranged on the cross rod (3), and the limiting and clamping mechanism is arranged on the base (1);

the driving mechanism comprises a motor (5), a driving shaft (6), a half gear (7), a first rotating gear (8), a fixed shaft (9), a wire coil (10), a pull rope (11), a moving rod (12) and a first spring (13), wherein the motor (5) is horizontally arranged on a support rod (2), the driving shaft (6) is installed on the motor (5), the half gear (7) is sleeved on the driving shaft (6), the half gear (7) is in key connection with the driving shaft (6), the fixed shaft (9) is arranged on one side of the driving shaft (6), the fixed shaft (9) is parallel to the driving shaft (6), the first rotating gear (8) is sleeved on the fixed shaft (9), the first rotating gear (8) is in key connection with the fixed shaft (9), the first rotating gear (8) is meshed with the half gear (7), the wire coil (10) is sleeved on the fixed shaft (9), the wire coil (10) is in key connection with the fixed shaft (9), the moving rod (12) is arranged between the cross rod (3) and the base (1), sliding grooves are formed in the cross rod (3) and the base (1), two ends of the moving rod (12) are respectively located in the two sliding grooves, the moving rod (12) is in sliding connection with the sliding grooves, one end of the pull rope (11) is connected with the wire coil (10), the other end of the pull rope (11) is connected with the moving rod (12), the pull rope (11) is wound on the wire coil (10), the first spring (13) is arranged in the sliding grooves, one end of the first spring (13) can be connected with the moving rod (12), and the other end of the first spring (13) is connected with the sliding grooves;

annotate liquid mechanism and include box (14), roll extrusion subassembly and annotate liquid subassembly, box (14) set up on horizontal pole (3), the roll extrusion subassembly sets up on carriage release lever (12), the roll extrusion subassembly includes stopper (15), spacing axle (16), cylinder (17) and second spring (18), be equipped with the spacing groove on carriage release lever (12), stopper (15) are located the spacing inslot, stopper (15) and spacing groove sliding connection, spacing axle (16) set up on stopper (15), cylinder (17) cover is established on spacing axle (16), cylinder (17) and spacing axle (16) key-type connection, second spring (18) set up at the spacing inslot, the one end and the spacing groove of second spring (18) are connected, the other end and the stopper (15) of second spring (18) are connected, the subassembly includes sleeve pipe (19), The piston rod (20), the third spring (21), the liquid inlet pipe (22), the liquid outlet pipe (23) and the nozzle (24), the sleeve (19) is arranged on the support rod (2), one end of the piston rod (20) is located in the sleeve (19), the other end of the piston rod (20) extends out of the sleeve (19), the piston of the piston rod (20) is connected with the sleeve (19) in a sealing manner, one end, located outside the sleeve (19), of the piston rod (20) is connected with the moving rod (12), the third spring (21) is arranged in the sleeve (19), one end of the third spring (21) is connected with the sleeve (19), the other end of the third spring (21) is connected with the piston of the piston rod (20), the liquid inlet pipe (22) and the liquid outlet pipe (23) are both arranged at the top of the sleeve (19), and the sleeve (19) is communicated with the interior of the box body (14) through the liquid inlet pipe (22), the nozzle (24) is arranged on the moving rod (12), the nozzle (24) is arranged opposite to the screen plate (4), and the nozzle (24) is communicated with the interior of the sleeve (19) through a liquid outlet pipe (23);

the limiting clamping mechanism comprises a limiting component and a clamping component, the limiting component comprises a fixed block (25), a positioning block (26), a positioning shaft (27), a fourth spring (28), a second rotating gear (29), a rack (30), a first magnet (31) and a second magnet (32), a positioning groove is formed in the moving rod (12), the positioning block (26) is located in the positioning groove, the positioning block (26) is in sliding connection with the positioning groove, the positioning shaft (27) is arranged on the positioning block (26), the fourth spring (28) is arranged in the positioning groove, one end of the fourth spring (28) is connected with the positioning groove, the other end of the fourth spring (28) is connected with the positioning block (26), the fixed block (25) is arranged between the base (1) and the screen plate (4), the positioning shaft (27) is abutted against the fixed block (25), the second rotating gear (29) is sleeved on the positioning shaft (27), second changes gear (29) and location axle (27) key-type connection, rack (30) set up the one side that second changes gear (29), rack (30) are changeed gear (29) with the second and are parallel, rack (30) change gear (29) meshing with the second, first magnet (31) set up on locating piece (26), second magnet (32) set up on base (1), second magnet (32) are located base (1) and keep away from the one end of carriage release lever (12), second magnet (32) are located fixed block (25) under, second magnet and first magnet (31) correspond the setting, second magnet (32) and first magnet (31) attract each other, the centre gripping subassembly sets up on location axle (27), the centre gripping subassembly includes four centre gripping units, and the contained angle that two adjacent centre gripping units formed is 90, the centre gripping unit is including fixed pipe (33), push rod (34), clamp splice (35) and fifth spring (36), fixed pipe (33) sets up on location axle (27), the one end of push rod (34) is located fixed pipe (33), outside fixed pipe (33) were stretched out to the other end of push rod (34), push rod (34) and fixed pipe (33) sliding connection, fifth spring (36) set up in fixed pipe (33), the one end and the fixed pipe (33) of fifth spring (36) are connected, the other end and the push rod (34) of fifth spring (36) are connected, clamp splice (35) set up the one end that is located fixed pipe (33) outside push rod (34), the cross-section of clamp splice (35) is the arc, the centre of a circle of the arc cross-section of clamp splice (35) is located the axis of location axle (27).

2. The screen printing apparatus for tubular workpieces according to claim 1, wherein the base (1) is provided with a PLC, and the motor (5) is electrically connected to the PLC.

3. The screen printing device for tubular workpieces according to claim 1, wherein the end of the positioning shaft (27) abutting against the fixed block (25) is provided with a pulley, and the pulley is in rolling connection with the fixed block (25).

4. The screen printing apparatus for tubular workpieces according to claim 1, wherein the connection of the liquid inlet pipe (22) and the sleeve (19) is provided with a one-way valve, and the connection of the liquid outlet pipe (23) and the sleeve (19) is provided with a one-way valve.

5. The screen printing device for tubular workpieces according to claim 1, wherein two sides of the limiting block (15) are provided with sliding blocks (37), a strip-shaped groove is formed in the limiting groove, the sliding blocks (37) are located in the strip-shaped groove, and the sliding blocks (37) are slidably connected with the strip-shaped groove.

6. The screen printing device for tubular workpieces according to claim 1, wherein the positioning blocks (26) are provided with positioning blocks (38) on two sides, positioning grooves are formed in the positioning grooves, the positioning blocks (38) are located in the positioning grooves, and the positioning blocks (38) are connected with the positioning grooves in a sliding manner.

7. Screen printing device for tubular workpieces according to claim 1, characterised in that said second spring (18) is in compression.

8. Screen printing device for tubular workpieces according to claim 1, characterised in that said fourth spring (28) is in compression.

9. The screen printing device for tubular workpieces according to claim 1, wherein the fixed block (25) is chamfered at both ends.

10. Silkscreen apparatus for tubular workpieces according to claim 1, characterized in that said outlet pipe (23) is a hose.