CN111890783A - Dampening mechanism of offset printing equipment and printing machine - Google Patents
Dampening mechanism of offset printing equipment and printing machine Download PDFInfo
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- CN111890783A CN111890783A CN202010686508.7A CN202010686508A CN111890783A CN 111890783 A CN111890783 A CN 111890783A CN 202010686508 A CN202010686508 A CN 202010686508A CN 111890783 A CN111890783 A CN 111890783A
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- frame body
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- 238000007645 offset printing Methods 0.000 title claims abstract description 37
- 238000007639 printing Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 118
- 230000000694 effects Effects 0.000 claims abstract description 21
- 238000009434 installation Methods 0.000 claims description 29
- 239000007788 liquid Substances 0.000 claims description 27
- 230000005540 biological transmission Effects 0.000 claims description 25
- 239000004065 semiconductor Substances 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 5
- 239000011324 bead Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims 2
- 238000005057 refrigeration Methods 0.000 description 14
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 10
- 235000017491 Bambusa tulda Nutrition 0.000 description 10
- 241001330002 Bambuseae Species 0.000 description 10
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 10
- 239000011425 bamboo Substances 0.000 description 10
- 238000005259 measurement Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F7/00—Rotary lithographic machines
- B41F7/20—Details
- B41F7/24—Damping devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F7/00—Rotary lithographic machines
- B41F7/02—Rotary lithographic machines for offset printing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rotary Presses (AREA)
Abstract
The invention relates to the field of offset printing equipment, in particular to a dampening mechanism and a printing machine of offset printing equipment, which comprise a part of mounting frame bodies, wherein a plate cylinder, a dampening roller, a water homogenizing roller, a metering roller and a water tank roller are horizontally and rotatably arranged between the mounting frame bodies; the invention can increase the effect of dampening on the plate cylinder, can change the thickness of the water film, achieves the purpose of adapting to different offset printing requirements, and can avoid the influence on the environment, thereby further ensuring the offset printing effect.
Description
Technical Field
The invention relates to the field of offset printing equipment, in particular to a dampening mechanism of offset printing equipment and a printing machine.
Background
Offset printing equipment is lithographic printing machine's one kind, on printing picture and text printed on blanket cylinder from the printing plate earlier during the printing, then by blanket cylinder rendition to the paper on, utilize blanket cylinder's self elasticity to guarantee the printing definition, the printing effect is higher, before carrying out the offset printing, often need to carry out the operation of dampening to a version section of thick bamboo, because the pattern part on a version section of thick bamboo is the material that repels water, and the blank part is hydrophilic material, can effectively avoid printing ink to be infected with in the blank part after dampening, guarantee the definition of offset printing.
But current offset printing water film thickness can't adjust, under the circumstances such as changing the version section of thick bamboo, the condition that the effect of dampening reduces appears easily, and direct water film is dampened simultaneously and is appeared the inhomogeneous condition of dampening easily, and current offset printing equipment can't avoid to the influence of environment moreover.
Chinese patent application No.: CN 201910339973.0; the dampening mechanism comprises a water body wallboard, a dampening roller frame is arranged on the water body wallboard, the dampening roller frame is arranged on the water body wallboard in a reciprocating mode, a roller frame moving transmission device is arranged between the dampening roller frame and the water body wallboard, a dampening roller shaft is connected onto the dampening roller frame, a dampening roller is arranged on the dampening roller shaft, rolling pillows are further arranged on the dampening roller shaft, and the rolling pillows are located on two sides of the dampening roller.
This solution has the following drawbacks:
1. this scheme will be followed the water roller and the direct counterbalance of water roller, and it is relatively poor to the effect of catching water of a version section of thick bamboo to catch water the roller, adjusts simultaneously that the water roller position changes its and the pressure between the water roller and controls the water film thickness, leads to the contact effect difference between water roller and the version section of thick bamboo easily, influences the effect of catching water.
2. The scheme does not consider the influence of the environment on the dampening solution, and the dampening effect is easily reduced under some environments.
Disclosure of Invention
The invention aims to provide a dampening mechanism of offset printing equipment and a printing machine.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an offset printing equipment's mechanism of dampening, includes the part installation support body, the level is rotated between the installation support body and is set up a version section of thick bamboo, dampening roller, even water roller, measurement roller and basin roller, a version section of thick bamboo offsets with dampening roller, even water roller sets up at dampening roller downside and offsets with dampening roller, the measurement roller sets up the one side of keeping away from a version section of thick bamboo at dampening roller and offsets with dampening roller, the basin roller sets up one side of keeping away from the water roller at the measurement roller and offsets with the measurement roller, the basin roller passes through position control subassembly and is connected with the installation support body, the fixed reservoir that sets up of basin roller downside, and the basin roller extends to in the reservoir, be equipped with temperature control assembly in the reservoir, a version section of thick bamboo, dampening roller and even water roller are connected through first drive assembly, dampening roller, measurement roller and basin roller pass through the second drive assembly and connect.
Furthermore, the position control assembly comprises two threaded rods which are symmetrically arranged at two sides of the mounting frame body, the two ends of the threaded rod are rotatably connected with fixed seats, the four fixed seats are fixedly connected with the mounting frame body, the two sides of the mounting frame body are respectively provided with a strip-shaped opening corresponding to the threaded rod, the two ends of the flume roller are respectively rotatably sleeved with a moving block, the two moving blocks are respectively connected with the mounting frame body in a sliding manner, the two moving blocks are respectively sleeved on the two threaded rods in a threaded manner, the installation support body middle level rotates and is equipped with the transfer line, the transfer line both ends run through the installation support body both sides respectively and rotate respectively and be connected with two drive bevel gear, two threaded rod lower extreme all runs through the fixing base and coaxial fixedly connected with driven bevel gear, two the drive bevel gear is connected with two driven bevel gear meshing respectively, the coaxial fixedly connected with turning handle of one end wherein of transfer line.
Further, the temperature control subassembly is including the fixed semiconductor refrigeration piece that sets up terminal surface under the reservoir, the liquid storage tank bottom is equipped with a plurality of conducting strips, and is a plurality of the conducting strip all runs through the reservoir and offsets with the semiconductor refrigeration piece, liquid storage tank bottom fixedly connected with circle piece, the symmetry runs through on the circle piece and sets up two first conducting blocks, the fixed electric actuator that is equipped with in liquid storage tank bottom, the coaxial fixedly connected with turning block of electric actuator output, the turning block offsets with the circle piece, the symmetry runs through on the turning block and sets up two second conducting blocks, two first conducting block is connected with the positive negative pole electricity of semiconductor refrigeration piece respectively, two the second conducting block is connected with external power source's positive negative pole electricity respectively.
Further, even water roller includes reciprocal lead screw, reciprocal lead screw both ends all are rotated with the installation support body and are connected, the removal body of rod has been cup jointed to the screw thread on the reciprocal lead screw, it is equipped with the effect roll body to rotate the cover on the removal body of rod, reciprocal lead screw bilateral symmetry is provided with two gag lever posts, the gag lever post both ends all with installation support body fixed connection, the removal body of rod slip cover is established on two gag lever posts.
Further, first drive assembly is including setting up the first gear in installation support body one side, version section of thick bamboo axis one end run through the installation support body and with the coaxial fixed connection of first gear, installation support body one side is rotated and is equipped with the second gear, second gear and first gear engagement, the first sprocket of coaxial fixedly connected with on the terminal surface of installation support body is kept away from to the second gear, water roller axis one end is run through installation support body and coaxial fixedly connected with second sprocket, reciprocal lead screw one end is run through installation support body and coaxial fixedly connected with third sprocket, first sprocket, second sprocket and third sprocket pass through chain drive and connect.
Furthermore, the second transmission assembly comprises a third gear which is rotatably arranged on one side of the installation frame body, one end of a middle shaft of the metering roller penetrates through the installation frame body and is coaxially and fixedly connected with the third gear, a fourth gear is coaxially and fixedly connected with a second chain wheel and is meshed with the third gear, a fifth gear is rotatably arranged on one side of the installation frame body and is meshed with the third gear, a first belt wheel is coaxially and fixedly connected onto the end face, far away from the installation frame body, of the fifth gear, one end of the middle shaft of the water tank roller extends to one side of the installation frame body and is coaxially and fixedly connected with a second belt wheel, and the second belt wheel is in transmission connection with the first belt wheel through a belt.
Further, the first gear diameter is larger than the second gear diameter.
Further, the diameter of the third gear is larger than that of the fourth gear, and the diameter of the third gear is equal to that of the fifth gear.
Further, the working steps of the dampening mechanism and the printing machine of the offset printing equipment are as follows:
a) the plate cylinder rotates, a first gear on the plate cylinder rotates, and the first gear is meshed with a second gear to drive the second gear to rotate, the second gear drives a first chain wheel to rotate when rotating, then the first chain wheel drives a second chain wheel and a third chain wheel to rotate through a chain, so that the rotation actions of the water roller and the reciprocating screw rod are realized, and the rotation directions of the water roller and the reciprocating screw rod are opposite to those of the plate cylinder;
b) the fourth gear is driven to rotate when the dampening roller rotates, the fourth gear is meshed with the third gear, meanwhile, the fifth gear is driven to rotate by the meshing effect of the third gear, the metering roller rotates when the third gear rotates, the rotating direction of the metering roller is opposite to that of the dampening roller, the fifth gear drives the first belt wheel to rotate, the first belt wheel drives the second belt wheel to rotate through the belt, the rotating action of the water tank roller is realized, and the rotating direction of the water tank roller is opposite to that of the metering roller;
c) when the water tank roller rotates, fountain solution in the liquid storage tank is wrapped and clamped and is transmitted to the metering roller, the metering roller transmits the fountain solution to the dampening roller, the rotation speed of the dampening roller is higher than that of the metering roller, a rubbing effect is generated on a contact surface, a water film formed by the fountain solution is rubbed into a fine water bead shape, at the moment, the water homogenizing roller can be driven to reciprocate in the horizontal direction due to the rotation effect of the reciprocating screw rod, so that the water film uniformly covers the dampening roller, and then the dampening roller transmits the water film to the plate cylinder, and dampening action is completed;
d) the distance between the metering roller and the water tank roller can control the thickness of a water film, when the thickness of the water film needs to be adjusted, the rotating handle can be rotated to drive the transmission rod to rotate, so that the two driving bevel gears are driven to rotate, the two driving bevel gears respectively drive the two driven bevel gears to rotate, the two threaded rods are driven to rotate, the two moving blocks are driven to move, and finally the purpose of adjusting the distance between the metering roller and the water tank roller is achieved;
e) because the rubbing action between the dampening roller and the metering roller can generate larger heat and the cooling state of the fountain solution needs to be ensured, the fountain solution can be refrigerated all the time through the semiconductor refrigerating sheet at the bottom of the liquid storage tank; when the weather is too cold, the dampening solution is required to be ensured not to be frozen, the rotating block can be driven to rotate through the electric actuator, the two second conductive blocks and the two first conductive blocks replace abutting objects, so that the anode and the cathode of the semiconductor refrigeration piece are reversely connected with the anode and the cathode of the power supply, the semiconductor refrigeration piece can perform heating at the moment, and the dampening solution is prevented from being frozen.
A printing machine comprises an offset printing unit, and the offset printing unit comprises the dampening mechanism of the offset printing equipment.
The invention has the beneficial effects that: the device can control the thickness of the water film covered on the dampening roller through the design of the metering roller, thereby adapting to different dampening requirements, further rubbing and leveling the water film, and further increasing the dampening efficiency and effect; the device can change the distance between the metering roller and the water tank roller, so that the thickness of the water film is controlled, different water-sticking requirements are met, the adaptability is high, and the market prospect is wide; the device has still set up the subassembly of control fountain solution temperature, has played the accuse temperature effect to the fountain solution, guarantees the cooling effect of fountain solution when the high temperature, guarantees the mobile state of fountain solution when the temperature is low excessively to guarantee the effect of dampening.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below.
FIG. 1 is a schematic left side view of a three-dimensional structure according to the present invention;
FIG. 2 is a schematic diagram of a right side perspective view of the present invention;
FIG. 3 is a schematic bottom perspective view of the present invention;
FIG. 4 is an exploded view of the interior of the mounting bracket of the present invention;
FIG. 5 is a schematic perspective view of a temperature control assembly according to the present invention;
FIG. 6 is a schematic perspective view of a position control assembly according to the present invention;
FIG. 7 is a schematic perspective view of a water distribution roller according to the present invention.
In the figure:
the device comprises a mounting frame body 1, a plate cylinder 2, a water feeding roller 3, a water homogenizing roller 4, a metering roller 5, a water tank roller 6, a liquid storage tank 7, a fixed seat 8, a moving block 9, a driving rod 10, a driving bevel gear 11, a driven bevel gear 12, a rotating handle 13, a semiconductor refrigerating sheet 14, a round block 15, a first conductive block 16, a rotating block 17, a second conductive block 18, a reciprocating screw rod 19, a moving rod body 20, an action roller body 21, a limiting rod 22, a first gear 23, a second gear 24, a first chain wheel 25, a second chain wheel 26, a third chain wheel 27, a third gear 28, a fourth gear 29, a fifth gear 30, a first belt wheel 31, a second belt wheel 32, a threaded rod 33 and an electric actuator 34.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some components of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product.
Referring to fig. 1, 2, 3 and 4, the dampening mechanism of an offset printing apparatus includes a part of mounting frame bodies 1, a plate cylinder 2, a dampening roller 3, a water-homogenizing roller 4, a metering roller 5 and a water tank roller 6 are horizontally rotatably arranged between the mounting frame bodies 1, and can be disassembled and rotated to complete dampening operation, the plate cylinder 2 abuts against the dampening roller 3, the water-homogenizing roller 4 is arranged at the lower side of the dampening roller 3 and abuts against the dampening roller 3, the metering roller 5 is arranged at one side of the dampening roller 3 far away from the plate cylinder 2 and abuts against the dampening roller 3, the water tank roller 6 is arranged at one side of the metering roller 5 far away from the dampening roller 3 and abuts against the metering roller 5, the dampening roller 6 stains dampening liquid and transmits the dampening liquid to the metering roller 5, the metering roller 5 transmits the formed water film to the dampening roller 3, the dampening roller 3 is uniform through the water-homogenizing roller 4, and then the dampening roller 3 performs dampening operation on the plate cylinder 2, the water tank roller 6 is connected with the mounting frame body 1 through a position control assembly, the position of the water tank roller 6 can be changed, so that the distance between the water tank roller 6 and the metering roller 5 is controlled, the thickness of a water film is changed, a liquid storage tank 7 is fixedly arranged on the lower side of the water tank roller 6, the water tank roller 6 extends into the liquid storage tank 7, a temperature control assembly is arranged in the liquid storage tank 7, the temperature of fountain solution is controlled, the plate cylinder 2, the dampening roller 3 and the water homogenizing roller 4 are connected through a first transmission assembly, the dampening roller 3, the metering roller 5 and the water tank roller 6 are connected through a second transmission assembly, synchronous rotation can be achieved, synchronism is guaranteed, and meanwhile, the whole action can be achieved only through one driving structure;
as shown in fig. 1, 2 and 6, the position control assembly comprises two threaded rods 33 symmetrically arranged on two sides of an installation frame body 1, two ends of each threaded rod 33 are rotatably connected with a fixed seat 8, four fixed seats 8 are fixedly connected with the installation frame body 1, two sides of the installation frame body 1 are respectively provided with a strip-shaped opening corresponding to the position of the threaded rod 33, two ends of a sink roller 6 are rotatably sleeved with a movable block 9, the two movable blocks 9 are respectively connected with the installation frame body 1 in a sliding manner, the two movable blocks 9 are respectively in threaded sleeve connection with the two threaded rods 33, the threaded rods 33 can drive the movable blocks 9 to move by rotating, a transmission rod 10 is horizontally rotated in the installation frame body 1, two ends of the transmission rod 10 respectively penetrate through two sides of the installation frame body 1 and are respectively and rotatably connected with two driving bevel gears 11, the lower ends of the two threaded rods 33 respectively penetrate through the fixed seats 8 and are coaxially, one end of the transmission rod 10 is coaxially and fixedly connected with a rotating handle 13, and the transmission rod 10 can be driven to rotate by rotating the rotating handle 13, so that the two driving bevel gears 11 are driven to rotate, the two driven bevel gears 12 are driven, and the rotation of the two threaded rods 33 is realized;
as shown in fig. 3 and 5, the temperature control assembly includes a semiconductor refrigeration sheet 14 fixedly disposed on the lower end surface of the liquid storage tank 7, and by adopting the prior art, the refrigeration operation can be performed to ensure the cooling of the fountain solution, the bottom of the liquid storage tank 7 is provided with a plurality of heat conduction sheets, the plurality of heat conduction sheets all penetrate through the liquid storage tank and abut against the semiconductor refrigeration sheet 14, so as to increase the heat transfer efficiency, the bottom of the liquid storage tank 7 is fixedly connected with a round block 15, two first conductive blocks 16 symmetrically penetrate through the round block 15, the bottom of the liquid storage tank 7 is fixedly provided with an electric actuator 34, the output end of the electric actuator 34 is coaxially and fixedly connected with a rotating block 17, the rotating block 17 abuts against the round block 15, two second conductive blocks 18 symmetrically penetrate through the rotating block 17, the two first conductive blocks 16 are respectively electrically connected with the positive and negative electrodes of the semiconductor refrigeration sheet 14, the semiconductor refrigeration piece 14 can be electrified, meanwhile, when the electric actuator 34 works, the rotating block 17 can rotate, the object of the two first conductive blocks 16 and the two second conductive blocks 18 which are abutted against each other is changed, the connection sequence of the semiconductor refrigeration piece 14 and the anode and the cathode of an external power supply is changed, the semiconductor refrigeration piece 14 is enabled to heat, and the fact that the fountain solution cannot be frozen when the temperature is low is guaranteed.
As shown in fig. 4 and 7, the water homogenizing roller 4 comprises a reciprocating screw rod 19, two ends of the reciprocating screw rod 19 are rotatably connected with the installation frame body 1, a movable rod body 20 is sleeved on the reciprocating screw rod 19 in a threaded manner, an action roller body 21 is arranged on the movable rod body 20 in a rotating manner, two limiting rods 22 are symmetrically arranged on two sides of the reciprocating screw rod 19, two ends of each limiting rod 22 are fixedly connected with the installation frame body 1, the movable rod body 20 is sleeved on the two limiting rods 22 in a sliding manner, the two limiting rods 22 play a limiting role in limiting the movable rod body 20, and when the reciprocating screw rod 19 rotates, the movable rod body 20 is driven to reciprocate, so that the reciprocating motion of the water homogenizing roller 4 is realized, the water homogenizing roller is enabled to act on the water roller 3, and the water.
As shown in fig. 1, the first transmission assembly includes a first gear 23 disposed on one side of the mounting frame body 1, one end of a middle shaft of the plate cylinder 2 penetrates through the mounting frame body 1 and is coaxially and fixedly connected with the first gear 23, one side of the mounting frame body 1 rotates to be provided with a second gear 24, the second gear 24 is meshed with the first gear 23, the second gear 24 is far away from a first chain wheel 25 of the coaxial fixedly connected with on the end surface of the mounting frame body 1, one end of a middle shaft of the dampening roller 3 penetrates through the mounting frame body 1 and is coaxially and fixedly connected with a second chain wheel 26, one end of the reciprocating screw rod 19 penetrates through the mounting frame body 1 and is coaxially and fixedly connected with a third chain wheel 27, the first chain wheel 25, the second chain wheel 26 and the third chain wheel 27 are connected through chain transmission, the dampening roller 3 and the reciprocating screw rod 19 are synchronously actuated when the plate cylinder 2.
As shown in fig. 1, the second transmission assembly includes a third gear 28 rotatably disposed on one side of the mounting frame body 1, one end of a central axis of the metering roller 5 penetrates through the mounting frame body 1 and is coaxially and fixedly connected with the third gear 28, a second sprocket 26 is coaxially and fixedly connected with a fourth gear 29, the fourth gear 29 is engaged with the third gear 28, one side of the mounting frame body 1 is rotatably disposed with a fifth gear 30, the fifth gear 30 is engaged with the third gear 28, a first belt pulley 31 is coaxially and fixedly connected to an end surface of the fifth gear 30 far away from the mounting frame body 1, one end of the central axis of the water tank roller 6 extends to one side of the mounting frame body 1 and is coaxially and fixedly connected with a second belt pulley 32, the second belt pulley 32 is in transmission connection with the first belt pulley 31 through a belt, the metering roller 5 and the water tank roller 6 are synchronously driven when the water application roller 3 rotates, the rotation directions of the metering roller 5 and the water application roller 3 are opposite, the normal work of the whole is ensured.
As shown in figure 1, the diameter of the first gear 23 is larger than that of the second gear 24, and the water application roller 3 and the plate cylinder 2 have the same angular speed, so that the dampening effect is ensured.
As shown in fig. 1, the diameter of the third gear 28 is larger than that of the fourth gear 29, so that a twisting action is generated between the dampening roller 3 and the metering roller 5, the water film is twisted into fine water particles, and a subsequent dampening effect is ensured, and the diameter of the third gear 28 is equal to that of the fifth gear 30, so that the metering roller 5 and the water tank roller 6 synchronously rotate in a fitting manner.
The working steps of the dampening mechanism of the offset printing equipment are as follows:
a) the plate cylinder 2 rotates, the first gear 23 on the plate cylinder 2 rotates, the first gear 23 is meshed with the second gear 24, so that the second gear 24 is driven to rotate, the second gear 24 drives the first chain wheel 25 to rotate when rotating, then the first chain wheel 25 drives the second chain wheel 26 and the third chain wheel 27 to rotate through a chain, the rotation actions of the water roller 3 and the reciprocating screw rod 19 are realized, and the rotation directions of the water roller 3 and the reciprocating screw rod 19 are opposite to that of the plate cylinder 2;
b) the fourth gear 29 is driven to rotate when the dampening roller 3 rotates, because the fourth gear 29 is meshed with the third gear 28, meanwhile, the third gear 28 drives the fifth gear 30 to rotate because of the meshing effect, the metering roller 5 rotates when the third gear 28 rotates, the rotating direction of the metering roller 5 is opposite to that of the dampening roller 3, the fifth gear 30 rotates to drive the first belt pulley 31 to rotate, the first belt pulley 31 drives the second belt pulley 32 to rotate through a belt, the rotating action of the water tank roller 6 is realized, and the rotating direction of the water tank roller 6 is opposite to that of the metering roller 5;
c) when the water tank roller 6 rotates, the fountain solution in the liquid storage tank 7 is wrapped and clamped and is transmitted to the metering roller 5, the metering roller 5 transmits the fountain solution to the dampening roller 3, the rotating speed of the dampening roller 3 is higher than that of the metering roller 5, a rubbing effect is generated on a contact surface, a water film formed by the fountain solution is rubbed into fine water bead shapes, at the moment, the water homogenizing roller 4 can be driven to reciprocate in the horizontal direction due to the rotating action of the reciprocating screw rod 19, so that the water film uniformly covers the dampening roller 3, and then the dampening roller 3 transmits the water film to the plate cylinder 2, and dampening action is completed;
d) the distance between the metering roll 5 and the water tank roll 6 can control the thickness of a water film, when the thickness of the water film needs to be adjusted, the rotating handle 13 can be rotated to drive the transmission rod 10 to rotate, so that the two driving bevel gears 11 are driven to rotate, the two driving bevel gears 11 respectively drive the two driven bevel gears 12 to rotate, the two threaded rods 33 are driven to rotate, the two moving blocks 9 are driven to move, and finally the purpose of adjusting the distance between the metering roll 5 and the water tank roll 6 is achieved;
e) because the rubbing action between the dampening roller 3 and the metering roller 5 can generate larger heat, the cooling state of the fountain solution needs to be ensured, and the semiconductor refrigerating sheet 14 at the bottom of the liquid storage tank 7 can always refrigerate the fountain solution; when the weather is too cold, it is required to ensure that the fountain solution cannot be frozen, at this time, the electric actuator 34 can drive the rotating block 17 to rotate, the two second conductive blocks 18 and the two first conductive blocks 16 replace abutting objects, so that the anode and the cathode of the semiconductor refrigeration sheet 14 are reversely connected with the anode and the cathode of the power supply, and at this time, the semiconductor refrigeration sheet 14 can be heated to avoid the fountain solution from being frozen.
A printing machine comprises an offset printing unit, and the offset printing unit comprises the dampening mechanism of the offset printing equipment.
Claims (10)
1. The dampening mechanism of the offset printing equipment is characterized by comprising a partial installation frame body (1), wherein a plate cylinder (2), a dampening roller (3), a water homogenizing roller (4), a metering roller (5) and a water tank roller (6) are horizontally and rotatably arranged between the installation frame body (1), the plate cylinder (2) is abutted against the dampening roller (3), the water homogenizing roller (4) is arranged on the lower side of the water roller (3) and is abutted against the water roller (3), the metering roller (5) is arranged on one side of the water roller (3) far away from the plate cylinder (2) and is abutted against the water roller (3), the water tank roller (6) is arranged on one side of the metering roller (5) far away from the water roller (3) and is abutted against the metering roller (5), the water tank roller (6) is connected with the installation frame body (1) through a position control assembly, a liquid storage tank (7) is fixedly arranged on the lower side of the water tank roller (6), and the water tank roller (6) extends into the liquid storage tank (7), the plate cylinder (2), the dampening roller (3) and the water homogenizing roller (4) are connected through a first transmission assembly, and the dampening roller (3), the metering roller (5) and the water tank roller (6) are connected through a second transmission assembly.
2. The dampening mechanism of the offset printing device according to claim 1, wherein the position control assembly comprises two threaded rods (33) symmetrically arranged on two sides of the mounting frame body (1), two ends of each threaded rod (33) are rotatably connected with the fixed seats (8), four fixed seats (8) are fixedly connected with the mounting frame body (1), two sides of the mounting frame body (1) are respectively provided with a strip-shaped opening corresponding to the threaded rod (33), two ends of the flume roller (6) are respectively rotatably sleeved with the movable blocks (9), two movable blocks (9) are respectively connected with the mounting frame body (1) in a sliding manner, two movable blocks (9) are respectively sleeved on the two threaded rods (33) in a threaded manner, the mounting frame body (1) is horizontally rotatably provided with the transmission rod (10), two ends of the transmission rod (10) respectively penetrate through two sides of the mounting frame body (1) and are respectively rotatably connected with two driving bevel gears (11), the lower ends of the two threaded rods (33) penetrate through the fixed seat (8) and are coaxially and fixedly connected with the driven bevel gears (12), the two driving bevel gears (11) are respectively meshed with the two driven bevel gears (12) and are connected with the transmission rod (10) through the rotating handle (13) in a coaxial and fixed mode at one end.
3. The dampening mechanism of the offset printing equipment according to claim 1, wherein the temperature control assembly comprises a semiconductor chilling plate (14) fixedly arranged on the lower end surface of the liquid storage tank (7), the bottom of the liquid storage tank (7) is provided with a plurality of heat conducting plates, the plurality of heat conducting plates penetrate through the liquid storage tank and abut against the semiconductor chilling plate (14), the bottom of the liquid storage tank (7) is fixedly connected with a round block (15), the round block (15) is symmetrically provided with two first conductive blocks (16) in a penetrating manner, the bottom of the liquid storage tank (7) is fixedly provided with an electric actuator (34), the output end of the electric actuator (34) is coaxially and fixedly connected with a rotating block (17), the rotating block (17) abuts against the round block (15), the rotating block (17) is symmetrically provided with two second conductive blocks (18) in a penetrating manner, and the two first conductive blocks (16) are respectively electrically connected with the positive electrode and the negative electrode of the semiconductor chilling plate (14), the two second conductive blocks (18) are respectively electrically connected with the positive electrode and the negative electrode of an external power supply.
4. The dampening mechanism of the offset printing equipment according to claim 1, wherein the water homogenizing roller (4) comprises a reciprocating screw rod (19), both ends of the reciprocating screw rod (19) are rotatably connected with the mounting frame body (1), a moving rod body (20) is sleeved on the reciprocating screw rod (19) in a threaded manner, an acting roller body (21) is arranged on the moving rod body (20) in a rotating manner, two limiting rods (22) are symmetrically arranged on both sides of the reciprocating screw rod (19), both ends of each limiting rod (22) are fixedly connected with the mounting frame body (1), and the moving rod body (20) is slidably sleeved on the two limiting rods (22).
5. The dampening mechanism of the offset printing device according to claim 4, wherein the first transmission assembly comprises a first gear (23) arranged on one side of the mounting frame body (1), one end of a center shaft of the plate cylinder (2) penetrates through the mounting frame body (1) and is coaxially and fixedly connected with the first gear (23), one side of the mounting frame body (1) is rotatably provided with a second gear (24), the second gear (24) is meshed with the first gear (23), a first chain wheel (25) is coaxially and fixedly connected to an end surface, far away from the mounting frame body (1), of the second gear (24), one end of a center shaft of the dampening roller (3) penetrates through the mounting frame body (1) and is coaxially and fixedly connected with a second chain wheel (26), one end of the reciprocating lead screw (19) penetrates through the mounting frame body (1) and is coaxially and fixedly connected with a third chain wheel (27), the first chain wheel (25), The second chain wheel (26) and the third chain wheel (27) are connected through chain transmission.
6. The dampening mechanism of the offset printing equipment according to claim 5, wherein the second transmission assembly comprises a third gear (28) rotatably disposed on one side of the mounting frame body (1), one end of a central shaft of the metering roller (5) penetrates through the mounting frame body (1) and is coaxially and fixedly connected with the third gear (28), the second chain wheel (26) is coaxially and fixedly connected with a fourth gear (29), the fourth gear (29) is meshed with the third gear (28), one side of the mounting frame body (1) is rotatably disposed with a fifth gear (30), the fifth gear (30) is meshed with the third gear (28), a first belt wheel (31) is coaxially and fixedly connected to an end surface of the fifth gear (30) far away from the mounting frame body (1), one end of the central shaft of the water tank roller (6) extends to one side of the mounting frame body (1) and is coaxially and fixedly connected with a second belt wheel (32), the second belt wheel (32) is in transmission connection with the first belt wheel (31) through a belt.
7. The dampening mechanism of an offset printing apparatus according to claim 5, wherein the diameter of the first gear (23) is larger than the diameter of the second gear (24).
8. The dampening mechanism of an offset printing apparatus according to claim 6, wherein the diameter of the third gear (28) is larger than the diameter of the fourth gear (29), and the diameter of the third gear (28) is equal to the diameter of the fifth gear (30).
9. The dampening mechanism of the offset printing equipment according to claim 1, wherein the dampening mechanism of the offset printing equipment and the printing machine work by the following specific steps:
a) the plate cylinder (2) rotates, the first gear (23) on the plate cylinder (2) rotates, the first gear (23) is meshed with the second gear (24), so that the second gear (24) is driven to rotate, the second gear (24) drives the first chain wheel (25) to rotate when rotating, then the first chain wheel (25) drives the second chain wheel (26) and the third chain wheel (27) to rotate through a chain, the rotating actions of the water roller (3) and the reciprocating screw rod (19) are realized, and the rotating directions of the water roller (3) and the reciprocating screw rod (19) are opposite to that of the plate cylinder (2);
b) the water feeding roller (3) drives the fourth gear (29) to rotate when rotating, because the fourth gear (29) is meshed with the third gear (28), meanwhile, the third gear (28) drives the fifth gear (30) to rotate due to the meshing effect, the third gear (28) enables the metering roller (5) to rotate when rotating, the rotating directions of the metering roller (5) and the water feeding roller (3) are opposite, the fifth gear (30) rotates to drive the first belt wheel (31) to rotate, the first belt wheel (31) drives the second belt wheel (32) to rotate through a belt, the rotating action of the water tank roller (6) is realized, and the rotating direction of the water tank roller (6) is opposite to that of the metering roller (5);
c) when the water tank roller (6) rotates, fountain solution in the liquid storage tank (7) is wrapped and clamped and is transmitted to the metering roller (5), the metering roller (5) transmits the fountain solution to the dampening roller (3), the rotating speed of the dampening roller (3) is higher than that of the metering roller (5), a rubbing effect is generated on a contact surface, a water film formed by the fountain solution is rubbed into fine water bead shapes, at the moment, the water homogenizing roller (4) can be driven to reciprocate in the horizontal direction under the rotating action of the reciprocating screw rod (19), so that the water film uniformly covers the dampening roller (3), and then the dampening roller (3) transmits the water film to the plate cylinder (2), so that dampening action is completed;
d) the distance between the metering roll (5) and the water tank roll (6) can control the thickness of a water film, when the thickness of the water film needs to be adjusted, the rotating handle (13) is rotated to drive the transmission rod (10) to rotate, so that the two driving bevel gears (11) are driven to rotate, the two driving bevel gears (11) respectively drive the two driven bevel gears (12) to rotate, the two threaded rods (33) are driven to rotate, the two moving blocks (9) are driven to move, and finally the purpose of adjusting the distance between the metering roll (5) and the water tank roll (6) is achieved;
e) because the rubbing action between the dampening roller (3) and the metering roller (5) can generate larger heat and the cooling state of the dampening solution needs to be ensured, the dampening solution can be refrigerated all the time through the semiconductor refrigerating sheet (14) at the bottom of the liquid storage tank (7); when the weather is too cold, the dampening solution is required to be ensured not to be frozen, the rotating block (17) can be driven to rotate by the electric actuator (34), the two second conductive blocks (18) and the two first conductive blocks (16) are replaced with abutting objects, so that the anode and the cathode of the semiconductor refrigerating sheet (14) are reversely connected with the anode and the cathode of the power supply, and the semiconductor refrigerating sheet (14) can be used for heating to avoid the dampening solution from being frozen.
10. A printing machine comprises an offset printing unit, and is characterized in that: the offset printing unit comprising a dampening mechanism of the offset printing apparatus as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010686508.7A CN111890783A (en) | 2020-07-16 | 2020-07-16 | Dampening mechanism of offset printing equipment and printing machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010686508.7A CN111890783A (en) | 2020-07-16 | 2020-07-16 | Dampening mechanism of offset printing equipment and printing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112659728A (en) * | 2020-12-16 | 2021-04-16 | 武汉工程大学 | High-efficient vertical type two-sided screen printing mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112659728A (en) * | 2020-12-16 | 2021-04-16 | 武汉工程大学 | High-efficient vertical type two-sided screen printing mechanism |
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