Screen printing plate flushing equipment and using method thereof
Technical Field
The invention relates to flushing equipment, in particular to screen flushing equipment and a using method thereof.
Background
Screen printing is a printing technique that uses a screen as a medium to transfer ink to an object to be printed. This printing method can be applied to a wide variety of materials including paper, plastic, metal, glass, wood, fabric, etc., and can be used for printing on flat or irregular surfaces.
The screen printing plate is an important part in the screen printing process, when the screen printing plate is manufactured, a proper screen (usually made of nylon, polyester or other synthetic fibers) is selected, the photosensitive emulsion is coated on the screen, then a design pattern is placed on the screen, part of the photosensitive emulsion on the screen is covered by the pattern, then the photosensitive emulsion is cured by exposure, the photosensitive emulsion in the area, which is not covered by the pattern, on the screen is cured by exposure to light, the photosensitive emulsion in the area, which is not covered by the pattern, is not cured due to the fact that the photosensitive emulsion is not exposed to light, then the screen is washed, and the part, which is not exposed to light, on the washing, is washed away, so that an opening area which is consistent with the pattern is formed on the screen, and the screen printing plate is obtained.
When the screen is washed, the screen is usually washed through the nozzle before being placed on the nozzle, in the actual process, the impact force of water flow on the screen is difficult to control, the problem of overlarge water flow impact force is often caused, if the water flow impact force is overlarge, the screen is deformed and damaged, especially for finer screens, serious damage is caused, and the overlarge water flow impact can cause that a solidified emulsion layer is peeled off from the screen, so that the whole screen is invalid, plate making is needed again, and the time and the material cost are increased.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides screen printing plate flushing equipment and a using method thereof.
The screen plate flushing device comprises a water tank, a screen plate positioning part and a flushing part, wherein the screen plate positioning part comprises a fixed seat, a supporting frame and a positioning frame for placing a screen plate, the positioning frame is rotatably arranged in the supporting frame, a motor for driving the positioning frame to turn over is arranged on the supporting frame, a guide rod is arranged on one side of the supporting frame, a sliding hole corresponding to the guide rod is arranged on the fixed seat, the guide rod is in sliding fit with the sliding hole, a rack is arranged on one side of the supporting frame, a resistance adjusting part which is matched with the rack and is used for adjusting the moving resistance of the supporting frame is arranged on the fixed seat, the flushing part is arranged corresponding to the positioning frame, and the flushing part is used for flushing the screen plate placed in the positioning frame.
Preferably, the flushing part comprises a nozzle and a swinging device, wherein the nozzle is connected to the swinging device, and the swinging device drives the nozzle to swing up and down.
The drag force adjusting component comprises a gear and a shell, wherein a cavity is formed in the shell, a cam is rotatably arranged in the cavity, a cam surface is arranged in the circumferential direction of the cam, the cam surface comprises a plurality of wave crest portions, wave trough portions are arranged between adjacent wave crest portions, a guide hole is formed in one side of the cavity, a push rod is slidably arranged in the guide hole, one end of the push rod is in contact with the cam surface on the cam, an adjusting screw is connected to one end of the guide hole in a threaded manner, a push spring is arranged between the adjusting screw and the push rod, the gear is located outside the shell, the gear is connected with the cam through a connecting shaft, and the gear is meshed with the rack.
Preferably, a positioning groove is formed in the inner side of the positioning frame, the screen plate is placed in the positioning groove, a rotating shaft is arranged at the lower end of the positioning frame, a shaft hole is formed in the lower end of the supporting frame, the rotating shaft is connected in the shaft hole, and the upper end of the positioning frame is connected with an output shaft of the motor.
Preferably, the upper end of the positioning frame is provided with a plunger hole, a plunger is arranged in the plunger hole, a first liquid medium cavity is formed between the plunger and the lower end of the plunger hole, and a first reset spring is arranged between the plunger and the lower end of the plunger hole; the two sides of the positioning frame are respectively provided with a cylinder body, a piston is arranged in the cylinder body, one end of the cylinder body, which is close to the positioning frame, is provided with an end plate, a second reset spring is arranged between the end plate and the piston, a second liquid medium cavity is formed between the piston and one end, which is far away from the end plate, of the cylinder body, a piston rod is connected to the piston, the piston rod penetrates through the end plate, the front end of the piston rod is provided with a movable limiting block, the inner side of the positioning frame is provided with a avoiding cavity for accommodating the movable limiting block, the positioning frame is provided with a liquid medium channel, one end of the liquid medium channel is communicated with the first liquid medium cavity, the other end of the liquid medium channel is connected with a liquid guide tube, one end, which is far away from the liquid medium channel, is communicated with the second liquid medium cavity, liquid medium is filled in the first liquid medium cavity and the second liquid medium cavity, a transmission ring corresponding to the plunger is arranged on the support frame, the transmission ring is fixedly connected with the support frame, the lower end of the transmission ring is provided with a contour surface, the contour surface is arranged on the piston rod, the contour surface comprises a plane area and a concave area, the upper end of the plunger is contacted with the contour surface, when the positioning frame is in an initial state, the positioning groove on the positioning frame faces the flushing part, and the concave area on the contour surface.
Preferably, the upper end of the plunger is provided with a roller.
Preferably, the liquid medium is hydraulic oil.
The using method of the screen printing plate flushing equipment comprises the following specific steps:
The method comprises the steps of firstly, placing a screen plate to be washed into a positioning groove on a positioning frame, enabling one side of the screen plate to face a washing part, washing one side of the screen plate through the washing part, moving the screen plate and a support frame away from the washing part under the action of water flow impact when the water flow impact force of the washing part on the screen plate is larger than the moving resistance of a support frame, and gradually reducing the water flow impact force of the screen plate and the moving resistance of the support frame along with the increase of the distance between the screen plate and the washing part in the moving process of the screen plate until the water flow impact force and the moving resistance of the support frame are balanced, so that the screen plate reaches a balance position;
the method comprises the steps of flushing one side of a screen plate by a flushing part, closing the flushing part, driving a positioning frame to rotate 180 degrees by a motor to turn over the screen plate, moving the upper end of a plunger from a concave area on a profile surface to a plane area on the profile surface in the process of turning over the screen plate, and enabling the plunger to move downwards, so that liquid medium in a first liquid medium cavity enters a second liquid medium cavity through a liquid medium channel and a liquid guide tube, pushing a piston to move, and enabling a movable limiting block to extend out of an avoidance cavity and prop against two sides of the screen plate;
The third step is that the motor drives the positioning frame to rotate 180 degrees to turn over the screen, the upper end of the plunger moves from a plane area on the profile surface to a concave area on the profile surface in the process of turning over the screen, at the moment, the plunger moves upwards under the action of the first reset spring, so that liquid medium in the second liquid medium cavity flows back into the first liquid medium cavity through the liquid medium channel and the liquid guide pipe, the movable limiting block loosens the screen and retracts the screen into the avoiding cavity, and the screen after washing is taken down from the positioning frame.
The invention has the beneficial effects that the deformation and damage of the screen mesh caused by overlarge water flow impact force can be effectively avoided by controlling the water flow impact force of the screen mesh in the flushing process, and the failure of the whole screen mesh caused by the peeling of the solidified photosensitive emulsion layer from the screen mesh due to the overlarge water flow impact is also avoided.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of the screen positioning member.
Fig. 3 is a schematic structural diagram of the positioning frame.
Fig. 4 is a side view of the positioning frame.
Fig. 5 is a cross-sectional view taken along the direction A-A in fig. 4.
Fig. 6 is an enlarged view of the portion D in fig. 5.
Fig. 7 is a sectional view in the direction B-B of fig. 4.
Fig. 8 is a cross-sectional view taken along the direction E-E in fig. 7.
Fig. 9 is a schematic structural view of the drive ring.
Fig. 10 is a schematic structural view of the resistance adjusting member.
Fig. 11 is a cross-sectional view of the resistance adjustment member.
In the figure, 1, a water tank, 2, a fixed seat, 3, a supporting frame, 4, a positioning frame, 4a, a positioning groove, 4b, a avoiding cavity, 4c, a liquid medium channel, 4d, a plunger hole, 5, a guide rod, 6, a resistance adjusting component, 6a, a gear, 6b, a shell, 6c, an adjusting screw, 6d, a connecting shaft, 6e, a cam, 6f, a guide hole, 6g, a push rod, 6h, a push spring, 7, a rack, 8, a motor, 9, a nozzle, 10, a swinging device, 12, a transmission ring, 12a, a plane area, 12b, a concave area, 13, a rotating shaft, 14, a plunger, 15, a cylinder body, 15a, a second liquid medium cavity, 16, a catheter, 18, a roller, 19, a first return spring, 20, a movable limiting block, 21, a piston, 22, a piston rod, 23, an end plate, 24 and a second return spring.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, fall within the scope of protection of the invention.
It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present invention.
It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.
As shown in figures 1 to 11, the screen flushing equipment comprises a water tank 1, a screen positioning part and a flushing part, wherein the screen positioning part comprises a fixed seat 2, a supporting frame 3 and a positioning frame 4 for placing a screen, the positioning frame 4 is rotatably arranged in the supporting frame 3, a motor 8 for driving the positioning frame 4 to turn over is arranged on the supporting frame 3, a guide rod 5 is arranged on one side of the supporting frame 3, a sliding hole corresponding to the guide rod 5 is arranged on the fixed seat 2, the guide rod 5 is in sliding fit with the sliding hole, a rack 7 is arranged on one side of the supporting frame 3, a resistance adjusting part 6 which is matched with the rack 7 and used for adjusting the moving resistance of the supporting frame 3 is arranged on the fixed seat 2, the flushing part is correspondingly arranged with the positioning frame 4, and the flushing part is used for flushing the screen placed in the positioning frame 4.
In the invention, the screen positioning component is arranged in the water tank 1, and the shape of the positioning frame 4 is matched with that of the screen. The rack 7 is parallel to the guide bar 5. Four guide rods 5 are arranged on one side of the support frame 3, and stable movement of the support frame 3 in the horizontal direction is guaranteed through four guide wire rods. The flushing member is capable of generating a water jet and flushing the screen surface. When the screen printing plate is washed, the supporting frame 3 is moved to a position close to the washing part, the screen printing plate is placed in the positioning frame 4, then the washing part is started to wash the screen printing plate through the washing part, if the water flow impact force of the washing part on the screen printing plate is larger than the moving resistance of the supporting frame 3 in the washing process, the screen printing plate and the supporting frame move towards a direction far away from the washing part under the water flow impact action, the water flow impact force born by the screen printing plate is gradually reduced along with the increase of the distance between the screen printing plate and the washing part in the moving process of the screen printing plate until the water flow impact force is balanced with the moving resistance of the supporting frame 3, the screen printing plate reaches an equilibrium position, the screen printing plate is stabilized at the position at the moment, and the water flow impact force born by the screen printing plate is consistent with the moving resistance of the supporting frame 3 at the moment, so that the moving resistance of the supporting frame 3 is adjusted through the resistance adjusting part 6, and the water flow impact force born by the screen printing plate in the washing process can be adjusted. According to the invention, the deformation and damage of the screen mesh caused by the overlarge water flow impact force can be effectively avoided by controlling the water flow impact force of the screen mesh in the flushing process, and the failure of the whole screen mesh caused by the peeling of the solidified photosensitive emulsion layer from the screen mesh due to the overlarge water flow impact is also avoided.
In this embodiment, the positioning frame 4 and the supporting frame 3 are both rectangular frame structures.
The flushing part comprises a nozzle 9 and a swinging device 10, wherein the nozzle 9 is connected to the swinging device 10, and the swinging device 10 drives the nozzle 9 to swing up and down. The nozzle 9 is connected with a water supply device through a water pipe, a booster pump is arranged on the water supply device, and water flow with certain pressure is sprayed outwards through the nozzle 9 to flush the screen. In this embodiment, the nozzle is a flat nozzle, and is driven to swing up and down within a certain angle range by the swinging device 10, so as to cover the screen surface of the whole screen.
Specifically, the resistance adjusting component 6 comprises a gear 6a and a shell 6b, a cavity is formed in the shell 6b, a cam 6e is rotatably arranged in the cavity, a cam 6e surface is arranged on the cam 6e in the circumferential direction, the cam 6e surface comprises a plurality of wave crest parts, wave trough parts are arranged between every two adjacent wave crest parts, a guide hole 6f is formed in one side of the cavity, a push rod 6g is slidably arranged in the guide hole 6f, one end of the push rod 6g is in contact with the cam 6e surface on the cam 6e, an adjusting screw 6c is connected with one end of the guide hole 6f in a threaded manner, a pressing spring 6h is arranged between the adjusting screw 6c and the push rod 6g, the gear 6a is located outside the shell 6b, the gear 6a is connected with the cam 6e through a connecting shaft 6d, and the gear 6a is meshed with the rack 7. The guide hole 6f is provided along the radial direction of the cam 6e, and one end of the ejector pin 6g near the cam 6e is arc-shaped. When the cam 6e rotates, the ejector rod 6g moves along the cam 6e surface on the cam 6e, the ejector rod 6g sequentially passes through the crest and trough on the cam 6e surface, a certain resistance is caused to the rotation of the cam 6e and the gear 6a by the existence of the ejector rod 6g, and a certain resistance is caused to the movement of the rack 7 due to the meshing of the gear 6a and the rack 7, so that a certain resistance is caused to the movement of the support frame 3, when the adjusting screw 6c is rotated, the compression amount of the ejection spring 6h can be changed, so that the ejection force of the ejector rod 6g on the cam 6e surface is adjusted, the rotation resistance of the cam 6e and the gear 6a is adjusted, and finally the movement resistance of the support frame 3 is adjusted.
The inner side of the positioning frame 4 is provided with a positioning groove 4a, the screen is placed in the positioning groove 4a, the lower end of the positioning frame 4 is provided with a rotating shaft 13, the lower end of the supporting frame 3 is provided with a shaft hole, the rotating shaft 13 is connected in the shaft hole, and the upper end of the positioning frame 4 is connected with an output shaft of the motor 8.
Further, a plunger hole 4d is formed in the upper end of the positioning frame 4, a plunger 14 is arranged in the plunger hole 4d, a first liquid medium cavity is formed between the plunger 14 and the lower end of the plunger hole 4d, and a first reset spring 19 is arranged between the plunger 14 and the lower end of the plunger hole 4 d; the two sides of the positioning frame 4 are respectively provided with a cylinder body 15, a piston 21 is arranged in the cylinder body 15, one end, close to the positioning frame 4, of the cylinder body 15 is provided with an end plate 23, a second return spring 24 is arranged between the end plate 23 and the piston 21, a second liquid medium cavity 15a is formed between the piston 21 and one end, far away from the end plate 23, of the cylinder body 15, a piston rod 22 is connected to the piston 21, the piston rod 22 penetrates through the end plate 23, the front end of the piston rod 22 is provided with a movable limiting block 20, the inner side of the positioning frame 4 is provided with a avoiding cavity 4b for accommodating the movable limiting block 20, the positioning frame 4 is provided with a liquid medium channel 4c, one end of the liquid medium channel 4c is communicated with the first liquid medium cavity, the other end of the liquid medium channel 4c is connected with a liquid guide tube 16, one end, far away from the liquid medium channel 4c, of the liquid medium cavity 15a is communicated with the second liquid medium cavity 15a, liquid medium is filled in the first liquid medium cavity 15a and the second liquid medium cavity 15a, a driving ring 12 corresponding to the plunger 14 is arranged on the supporting frame 3, the driving ring 12 is fixedly connected with the supporting frame, the lower end of the driving ring 12 is provided with the driving ring, the driving ring 12 is provided with a contour surface, the contour surface comprises a plane area 12a and the upper end of the contour surface 12b is in contact with the contour surface of the contour surface 14 b, and the contour surface is in the concave area 14 b, and is in contact with the contour surface of the initial contour surface 4b, and the contour surface is positioned on the initial contour surface 4, and the contour surface is positioned on the contour surface 4, and the initial surface is in the contour surface is positioned on the upper surface 4 and the initial surface and the surface is in the depression surface 4 is in the surface is in the position in the surface is in the surface and in the contact.
When the screen is placed, the positioning frame 4 is in an initial state, the screen is directly placed into the positioning groove 4a at the inner side of the positioning frame 4, then the flushing part is directly opened to flush the screen, and when the side of the screen is flushed, the screen is firmly fixed in the positioning frame 4 under the impact force of water flow, and at the moment, even if no fixing measures are taken for the screen, the screen can be stably placed in the positioning frame 4. When the positioning frame 4 rotates 180 degrees and washes the other side of the screen, in the process of turning over the screen, the upper end of the plunger 14 moves from the concave area 12b on the profile surface to the plane area 12a on the profile surface, so that the plunger 14 moves downwards, the liquid medium in the first liquid medium cavity enters the second liquid medium cavity 15a through the liquid medium channel 4c and the liquid guide tube 16, the piston 21 is pushed to move, the movable limiting block 20 extends out of the avoiding cavity 4b and abuts against two sides of the screen, the screen is tightly abutted by the movable limiting block 20, the screen can be stably fixed in the positioning frame 4 against the impact of water flow, when the screen is turned over again 180 degrees, the upper end of the plunger 14 moves from the plane area 12a on the profile surface to the concave area 12b on the profile surface, and the plunger 14 moves upwards under the action of the first reset spring 19, so that the liquid medium in the second liquid medium cavity 15a flows back into the first liquid medium cavity through the liquid medium channel 4c and the liquid guide tube 16, the movable limiting block 20 is abutted against the impact of water flow, and the screen can be stably fixed in the positioning frame 4b, and the screen can be withdrawn from the lower side of the screen 4.
According to the invention, after the screen is placed in the positioning frame 4, manual operation is not required to fix the screen, the screen can be automatically fixed and clamped in the process of turning and flushing, and can be automatically loosened from the positioning frame 4 when turning again, manual operation is not required in the process, the screen is directly placed in the positioning frame 4 before flushing, and the screen is directly taken off from the positioning frame 4 after flushing, so that flushing operation of the screen is facilitated.
In this embodiment, the cross section of the movable limiting block 20 is a right trapezoid, and a pressing inclined plane is disposed on the movable limiting block. When the movable limiting block is used for fixing the screen, the jacking inclined plane on the movable positioning plate is contacted with the hard outer frame body of the screen, and partial pressure towards the bottom of the positioning groove 4a is generated on the screen through the jacking inclined plane.
The upper end of the plunger 14 is provided with a roller 18. By providing the roller 18 at the upper end of the plunger 14, the roller 18 reduces frictional resistance between the upper end of the plunger 14 and the contoured surface.
In this embodiment, hydraulic oil is used as the liquid medium.
The using method of the screen printing plate flushing equipment comprises the following specific steps:
The method comprises the steps of placing a screen plate to be washed into a positioning groove 4a on a positioning frame 4, enabling one side of the screen plate to face a washing component, washing one side of the screen plate through the washing component, moving the screen plate and a supporting frame in a direction away from the washing component under the action of water flow impact when the water flow impact force of the washing component on the screen plate is larger than the moving resistance of the supporting frame 3, and gradually reducing the water flow impact force of the screen plate along with the increase of the distance between the screen plate and the washing component in the moving process of the screen plate until the water flow impact force is balanced with the moving resistance of the supporting frame 3, so that the screen plate reaches an equilibrium position.
The second step is that after the flushing part is used for flushing one side of the screen, the flushing part is closed, the motor 8 drives the positioning frame 4 to rotate 180 degrees to enable the screen to be turned over, in the process of turning over the screen, the upper end of the plunger 14 moves from the concave area 12b on the profile surface to the plane area 12a on the profile surface, the plunger 14 moves downwards, so that liquid medium in the first liquid medium cavity enters the second liquid medium cavity 15a through the liquid medium channel 4c and the liquid guide tube 16, the piston 21 is pushed to move, the movable limiting block 20 extends out of the avoidance cavity 4b and pushes against two sides of the screen, after the screen is turned over, the flushing part is opened and the other side of the screen is flushed, and after flushing is completed, the flushing part is closed.
The third step is that the motor 8 drives the positioning frame 4 to rotate 180 degrees to turn over the screen, the upper end of the plunger 14 moves from the plane area 12a on the profile surface to the concave area 12b on the profile surface in the process of turning over the screen, the plunger 14 moves upwards under the action of the first reset spring 19 at this time, so that the liquid medium in the second liquid medium cavity 15a flows back to the first liquid medium cavity through the liquid medium channel 4c and the liquid guide tube 16, the movable limiting block 20 loosens the screen and retracts the screen into the avoiding cavity 4b, and the screen after washing is taken down from the positioning frame 4.
The present application is not limited to the above-mentioned preferred embodiments, and any person who can obtain other various products under the teaching of the present application can make any changes in shape or structure, and all the technical solutions that are the same or similar to the present application fall within the scope of the present application.