CN215243793U

CN215243793U - UV printer

Info

Publication number: CN215243793U
Application number: CN202121816468.XU
Authority: CN
Inventors: 张波; 高梁伟
Original assignee: Guangzhou Jinghui Industry Co ltd
Current assignee: Guangzhou Jinghui Industry Co ltd
Priority date: 2021-08-04
Filing date: 2021-08-04
Publication date: 2021-12-21
Anticipated expiration: 2031-08-04

Abstract

A UV printer, comprising: the device comprises a left supporting frame, a right supporting frame, an unreeling device, a first air expansion shaft, a printing platform, a trolley beam, a spraying trolley and a winding device, wherein the left supporting frame and the right supporting frame are respectively arranged on the left side and the right side; the printing medium that the unwinding device unreeled reaches the winder through first physiosis axle, print platform in proper order and is rolled up by the winder, and torque motor, moment speed reducer are installed to first physiosis axle tip, and torque motor drives first physiosis axle through moment speed reducer and rotates. The cooperation of torque motor, moment speed reducer, physiosis axle to flexible soft material, it can maintain appropriate tensioning degree for flexible soft material has smooth face of being printed after getting into print platform, improves and prints precision and printing effect. The printer is suitable for printing of various hard, thick, flexible and flexible materials, realizes multiple purposes, and overcomes the defect that only special printers can be adopted for different materials in the prior art.

Description

UV printer

Technical Field

The invention relates to the technical field of printers, in particular to a UV printer.

Background

The UV printer is a high-tech plate-free full-color digital printer and is not limited by materials. The color photo-grade printing can be carried out on the surfaces of T-shirts, sliding doors, cabinet doors, sliding doors, glass, plates, various labels, crystals, PVC, acrylic, metal, plastics, stones, leather and the like. However, the existing UV printer still has certain limitations and defects when in use, for example, the traditional small UV printer is mainly applied to some hard paper materials, and for some flexible soft materials, printing is difficult or a good printing effect is difficult to achieve. If the flexible soft material is not tensioned, the surface is loose, the cloth arching condition is easy to occur, and the pattern cannot be accurately printed to the corresponding area; to the driving roller among the prior art, if utilize the printing platform around the driving roller rotational speed difference and this material of tensioning, then easily because of the tensioning excessively takes place to skid, arouse resilience and local arch, lead to printing the inequality, print the effect relatively poor. Therefore, there is a need in the art for a UV printer that can be used in multiple purposes, so as to achieve better printing effect for rigid paper materials, flexible materials, and the like.

Disclosure of Invention

The invention aims to overcome at least one defect of the prior art, and provides the UV printer which is suitable for printing various materials such as hard materials, flexible materials and the like, realizes multiple purposes, and improves the printing precision and the printing effect.

The invention adopts the technical scheme that the UV printer comprises: the device comprises a left supporting frame, a right supporting frame, an unreeling device, a first air expansion shaft, a printing platform, a trolley beam, a spraying trolley and a winding device, wherein the left supporting frame and the right supporting frame are respectively arranged on the left side and the right side; the printing medium that the unreeling device unreeled arrives the winder and is rolled up by the winder through first physiosis axle, print platform in proper order, torque motor, moment speed reducer are installed to first physiosis axle tip, torque motor passes through the rotation of the first physiosis axle of moment speed reducer drive. When the printing medium unreeled by the unreeling device passes through the first air inflation shaft, the first air inflation shaft inflates air to be attached to the printing medium, and a certain friction force is provided so that the printing medium does not slip; meanwhile, the first air expansion shaft is controlled by a torque motor and a torque reducer at the end part of the first air expansion shaft, the torque motor controls the first air expansion shaft to rotate through the torque reducer so as to send a roll, and simultaneously provides resistance opposite to the roll sending direction of a printing medium, so that the printing medium is tensioned at the input side, and the tension state can be maintained before and after the printing platform is input by matching with a winder at the rear side. And because the torque motor and the torque reducer are adopted for driving, the resistance can be adjusted, the tensioning degree of the printing medium can be maintained, the looseness or excessive tensioning is avoided, and the proper tensioning degree can be maintained for the flexible soft material, so that the flexible soft material has a smooth printed surface after entering the printing platform, and the printing precision and the printing effect are improved. Moreover, for a hard paper material or a thick printing material, the printing surface of the hard paper material or the thick printing material can be stretched, tensioned and laid flat by tensioning the hard paper material or the thick printing material through the first tensioning roller, so that the printing precision and the printing effect are improved. The UV printer can be suitable for printing of hard and thick materials and flexible and soft materials by utilizing the matching of the structure, realizes multiple purposes, and overcomes the defect that special printers are required to be adopted for various materials in the prior art. Further, the flexible soft material is a flexible soft material, such as a flexible cloth. And this application UV printer simple structure, stability, easy to maintain.

Further, the device also comprises a torque controller which is used for controlling the torque of the first air expansion shaft in the rotating process through a torque motor and a speed reducer. Further, the torque controller adjusts in real time according to the torque of the first inflation shaft to maintain a relatively constant material tension.

Further, still include: the lamp box comprises a first support rod, a second support rod, a first guide rod, a lamp box and a second guide rod, wherein the first support rod and the second support rod are arranged on the front side, and the first guide rod, the lamp box and the second guide rod are arranged on the rear side; the first supporting rod and the second supporting rod are arranged below the unreeling device and jointly support the printing medium coiled material, and the printing medium unreeled by the unreeling device sequentially passes through the first inflatable shaft, the printing platform, the first guide rod, the lamp box upper portion and the second guide rod to reach the reeling device and be reeled by the reeling device. When the printing medium coiled material is larger and heavier, the first supporting rod and the second supporting rod can provide certain support, so that the phenomenon that the printing medium coiled material causes overlarge burden on the unreeling device is avoided, and the service life of the unreeling device is prolonged. The first guide rod and the second guide rod are arranged on the rear side, namely the output side of the printing platform, so that the guide transition to the unreeling device is facilitated, and the tensioning effect of the printing medium is maintained in the process. The arrangement of the lamp box facilitates the observation of the printing effect aiming at some internal light materials.

Further, the lamp box comprises a light emitting surface facing the rear side, and the distance between the light emitting surface and a plane formed by the first guide rod and the second guide rod is 6-10 cm. When the upward distance of the light-emitting surface is too close to the printing medium, the irradiation brightness of the printing medium is higher, and the white ink printing pattern is not easy to observe; and too far away, the brightness is darker, and the dark pattern is not easy to observe. The image of the printing medium can be observed properly when the image is arranged at 6-10 cm.

Furthermore, the diameters of the first guide rod and the second guide rod are 5 cm-8 cm.

And the printed printing medium sequentially passes through the transition guide rod, the first guide rod, the upper part of the lamp box and the second guide rod to reach the winder and be wound by the winder. The transition guide rod is arranged to facilitate the drawing of the printing medium onto the first guide rod and the second guide rod so as to pass through the upper part of the lamp box to be irradiated.

Further, the printing platform front side still is fixed with into cloth platform, it is the arc structure to advance the cloth platform, and one end and printing platform parallel and level, other end downwardly extending form the cambered surface, and the printing medium that the unreeling device unreeled arrives printing platform through first physiosis axle, advance cloth platform. Through the cloth feeding platform, the printing medium can smoothly enter the printing platform, and the material can be tensioned and protected from being abraded before entering the printing platform.

Furthermore, the printing platform comprises a pinch roller area arranged on one side where the printing medium enters and an inkjet area arranged on the other side, and the pinch roller area is provided with a plurality of through holes; a cloth feeding shaft is arranged below the printing platform, a plurality of cloth feeding wheels with positions corresponding to the positions of the through holes in the pinch roller area are sleeved outside the cloth feeding shaft, and the tops of the cloth feeding wheels are exposed in the through holes in the corresponding positions in the pinch roller area; the printing platform top is equipped with the pinch roller module, the pinch roller module is including being fixed in a plurality of pinch rollers on the dolly roof beam, and the cylinder of pinch roller and the cylinder laminating of walking in the through-hole of corresponding position on the platform main part and taking turns. The pinch roller area and the spray painting area can be different areas of an integrally formed platform, and can also be two independent platform plates which are connected with each other to form a complete platform main body. The pinch roller area is provided with a plurality of through holes, the through holes are rectangular through holes and are evenly distributed on the platform along the length direction of the platform. The cloth walking shaft is arranged below the pressing wheel area of the platform main body, a plurality of cloth walking wheels are sleeved outside the cloth walking shaft, and the cloth walking wheels rotate around the axis of the cloth walking shaft under the driving of the cloth walking shaft. The cloth-moving shaft is sleeved with cloth-moving wheels with the number less than or equal to that of the through holes in the pinch roller area, at least each cloth-moving wheel is provided with a through hole at a corresponding position in the longitudinal direction, and the tops of the cloth-moving wheels can be exposed in the through holes at the corresponding positions because the cloth-moving shaft is positioned below the pinch roller area of the platform main body. The pressing wheel module comprises a plurality of pressing wheels, the pressing wheels are respectively fixed on the trolley beam through a support, the support comprises a paper pressing shaft and a main support for fixing the paper pressing shaft, and the pressing wheels are sleeved on the paper pressing shaft; the pressing wheel is a cylindrical body with an axis parallel to the horizontal plane and elasticity, and is rotatably fixed on a bracket of the pressing wheel, and the axis of the pressing wheel is parallel to the axis of the cloth moving wheel. The number of the pressing wheels is the same as that of the cloth conveying wheels, and each pressing wheel corresponds to the position of the cloth conveying wheel in the longitudinal direction one by one and is mutually attached. When the pressing wheel is contacted with the cloth moving wheel, the cylindrical surface at the bottom of the pressing wheel is in extrusion contact with the cylindrical surface at the top of the cloth moving wheel in the through hole. The platen drive can improve the compatibility of materials and achieve the effect of conveying various types of recording media. The function of a large rubber roller in the prior art is realized by utilizing the cloth feeding shaft, the industrial-grade requirement is realized by using a smaller mechanical structure, the cost is lower, the deformation is not easy, and the using effect is better.

The cloth pressing device comprises a trolley beam, a connecting rod, a secondary cloth pressing wheel and a regulating support, wherein the sliding rail is arranged on the trolley beam, the connecting rod is connected with the sliding rail and moves along the sliding rail, the length direction of the secondary cloth pressing wheel is consistent with the feeding direction of the printing platform, the length direction of the sliding rail is consistent with the length direction of the trolley beam, one end of the connecting rod is connected with the sliding rail in a sliding mode, the other end of the connecting rod is connected with the secondary cloth pressing wheel through the regulating support, the secondary cloth pressing wheel reciprocates along the connecting rod in the length direction of the sliding rail, the regulating support is used for lifting the secondary cloth pressing wheel when the connecting rod moves from the outer side to the inner side, and the secondary cloth pressing wheel is put down to press cloth when the connecting rod moves from the inner side to the outer side and the secondary cloth pressing wheel is above a printing medium. The existing printing equipment generally presses cloth on a printing medium in a feeding direction so as to be close to the surface of a printing platform when entering the printing platform, and thus, the printing equipment is convenient to print accurately. However, in the case of the stretchable soft material, since it has flexibility and stretchability, it is stretchable in a transverse direction perpendicular to a feeding direction in addition to the feeding direction, and therefore, there is a possibility that the stretchable soft material is warped in the transverse direction. For this reason, the present application is provided with a transverse cloth pressing unit in addition to the above-described pressing roller, which presses the cloth downward and moves outward when the sub-cloth pressing wheel travels over the printing medium, thereby tensioning the printing material in the transverse direction. And because of adopting the wheel-shaped structure, the printing material is stretched outwards in a mode of rolling on a plane, so that the condition of over-tension can not be generated. Thereby playing a good role in transversely tensioning the printing material. The flexible soft material maintains the tensioned state in the longitudinal direction and the transverse direction in cooperation with the tensioning in the feeding direction (the longitudinal direction). Based on entering the printing area under the state, cloth arching and bulging caused by elasticity in the longitudinal direction and the transverse direction can be effectively avoided, and therefore the printing effect is remarkably improved. When the printing medium walks to expect to move to the position of horizontal compress unit effect, the connecting rod carries out reciprocating motion along dolly roof beam length direction this moment, and presses the inferior compress wheel through the alignment jig towards the removal in-process in the outside by the inboard to the tensioning to the outside, by the outside towards the inboard removal in-process, for avoiding to arch up the printing material to the inboard, lift the inferior compress wheel through the alignment jig in order to avoid with the direct contact of printing medium.

Further, the left side and the right side comprise a plurality of transverse cloth pressing units, and the plurality of transverse cloth pressing units are arranged on the pressing wheel area and between the cloth conveying wheel and the printing area. Namely, the left and right transverse cloth pressing units are symmetrically used for transversely tensioning from the left side and the right side respectively, so that the tensioning effect is better. And a plurality of horizontal compress units are arranged on the pinch roller area and between the cloth travelling wheel and the printing area, so that the interference to other compress structures and printing structures can be effectively avoided.

Further, the adjusting bracket is driven by the motor to lift the secondary cloth pressing wheel or put down the secondary cloth pressing wheel.

Furthermore, a plurality of negative pressure holes are uniformly distributed on the spray painting area, and the negative pressure holes are directly or indirectly connected with a negative pressure device.

Furthermore, a negative pressure containing cavity cover body buckled on the lower surface of the printing area is arranged below the printing area, a vent hole is formed in the negative pressure containing cavity cover body and communicated with the negative pressure hole, and the vent hole is connected with a negative pressure device. Further, the negative pressure device is a negative pressure fan.

Further, install one-level ink horn, ink pump on the left branch strut, be equipped with the second grade ink horn on the spray carriage, install the shower nozzle of china ink bag, install the negative pressure case on the right branch strut, the one-level ink horn is through supplying china ink pipe and second grade ink horn intercommunication, and the one-level ink horn receives the drive of ink pump to supply china ink to the second grade ink horn through supplying china ink pipe, and the second grade ink horn is connected with the negative pressure case and receives the interior ink liquid level of negative pressure case control second grade ink horn, the second grade ink horn communicates with the china ink bag of installing on the shower nozzle, china ink bag and shower nozzle orifice intercommunication. When bubbles exist in the ink path from the first-level ink box to the second-level ink box, the bubbles cannot directly enter the spray head, so that the problems of line breaking and the like caused by the bubbles can be effectively avoided, and the space which is not completely full of ink liquid is formed inside the second-level ink box, so that the effects of buffering and reducing the bubbles on the ink path from the first-level ink box to the second-level ink box can be achieved. The problem of resistance and the like caused by long path from the first-level ink box to the spray head can be avoided by matching the first-level ink box, the ink pump and the second-level ink box, and the ink supply is smooth, so that the printing effect is improved. The secondary ink box is also connected with a negative pressure box, and the liquid level state in the secondary ink box is controlled through the negative pressure box, so that the stability of supplying ink to the ink bag and the jet orifice on the nozzle is maintained.

Further, the negative pressure box is a double-way negative pressure box, a first negative pressure pump, a second negative pressure pump and a control module are arranged in the negative pressure box, the power of the first negative pressure pump is smaller than that of the second negative pressure pump, the first negative pressure pump and the second negative pressure pump are connected with the second-stage ink box through negative pressure pipes with the same diameter, and the first negative pressure pump and the second negative pressure pump are controlled by the control module to be opened and closed. Through the negative pressure pumps with different powers, the negative pressure degree in the secondary ink box can be accurately adjusted, so that the liquid level can be accurately controlled, and the ink supply is more continuous and stable. The negative pressure pipe is a hose structure for connecting the negative pressure pump and the secondary ink box.

Further, a positive pressure pump is further arranged in the negative pressure box, the positive pressure pump is connected with the secondary ink box through a positive pressure pipe and used for being matched with the first negative pressure pump and the second negative pressure pump to control the ink liquid level in the secondary ink box, and the positive pressure pump is controlled by the control module to be opened and closed. When the negative pressure in the secondary ink box is larger, the positive pressure is provided to be favorable for returning to the required negative pressure state so as to continuously and stably supply ink. The positive pressure pipe is a hose structure for connecting the positive pressure pump and the secondary ink box.

Furthermore, a liquid level switch is arranged on the secondary ink box, and the control module receives a liquid level switch signal and responds. The liquid level in the secondary ink box is determined according to the state of the liquid level switch, so that negative pressure required in the secondary ink box at the moment is provided.

Furthermore, a waste ink tank is installed on the right support frame, the spray truck is located above the waste ink tank when moving to the right side, a waste ink outflow hole is formed in the bottom of the waste ink tank, and the waste ink outflow hole is communicated with a waste ink bottle placed on the right support frame below the waste ink outflow hole.

Furthermore, the first-stage ink box is lower than the second-stage ink box and is lower than or flush with the spray hole of the spray head.

Furthermore, the unreeling device is a double-power paper feeder arranged above the first supporting rod and the second supporting rod.

Further, the winder is a second inflatable shaft. Furthermore, a high-voltage servo motor and a planetary reducer are mounted at the end part of the second inflatable shaft, and the high-voltage servo motor drives the second inflatable shaft to rotate through the planetary reducer. Through the second physiosis axle, be convenient for cooperate unreel ware, first physiosis axle to provide the tension of printing platform front and back side to maintain print media's tensioning degree, play the effect of tightening print media always. The adoption physiosis axle is favorable to laminating chucking printing medium, avoids skidding, control tensioning degree.

Another object of the present invention is to provide a printing method, which uses the above-mentioned UV printer to print, and includes the following steps: the printing medium unreeled by the unreeling device sequentially passes through the first air expansion shaft and the printing platform to reach the reeling device;

a1, starting a printer, unwinding by an unwinding device, winding by a winding device, and enabling an area to be subjected to inkjet printing on a printing medium to reach a first inflatable shaft;

a2, providing resistance opposite to the moving direction for the area to be sprayed and painted while the first air expansion shaft rotates to send the roll, and moving the area to be sprayed and painted to the surface of the printing platform in a tensioning manner;

a3, printing the printing medium moved to the surface of the printing platform by a nozzle on the spray carriage, continuously tensioning the area to be sprayed and printed, and rolling by a rolling device after printing.

Furthermore, the printing platform comprises a pinch roller area arranged on one side where the printing medium enters and an inkjet area arranged on the other side, and the pinch roller area is provided with a plurality of through holes; a cloth feeding shaft is arranged below the printing platform, a plurality of cloth feeding wheels with positions corresponding to the positions of the through holes in the pinch roller area are sleeved outside the cloth feeding shaft, and the tops of the cloth feeding wheels are exposed in the through holes in the corresponding positions in the pinch roller area; a pinch roller module is arranged above the printing platform and comprises a plurality of pinch rollers fixed on a trolley beam, and the cylindrical surfaces of the pinch rollers are attached to the cylindrical surfaces of the cloth feeding wheels in the through holes at the corresponding positions on the platform main body;

the UV printer further comprises: the cloth pressing device comprises a trolley beam, a connecting rod, a secondary cloth pressing wheel and a transverse cloth pressing unit, wherein the sliding rail is arranged on the trolley beam, the connecting rod is connected with the sliding rail and moves along the sliding rail, the length direction of the secondary cloth pressing wheel is consistent with the length direction of the trolley beam, one end of the connecting rod is connected with the sliding rail in a sliding mode, the other end of the connecting rod is connected with the secondary cloth pressing wheel through an adjusting support, the secondary cloth pressing wheel moves back and forth along the length direction of the sliding rail along with the connecting rod, the adjusting support is used for lifting the secondary cloth pressing wheel when the connecting rod moves from the outer side to the inner side, and the secondary cloth pressing wheel is put down to press cloth when the connecting rod moves from the inner side to the outer side and the secondary cloth pressing wheel is above a printing medium;

the method comprises the following specific steps:

the printing medium unreeled by the unreeling device sequentially passes through the first air expansion shaft and the printing platform to reach the reeling device;

a2, providing resistance opposite to the moving direction for the area to be subjected to inkjet printing while the first air expansion shaft rotates to send the roll, tensioning and moving the area to be subjected to inkjet printing of the printing medium, and enabling the area to be subjected to inkjet printing of the printing medium to enter a pinch roller area of the printing platform;

a3, treat that the air brushing region moves to the in-process in the printing region in the pinch roller region, the pinch roller with walk the cloth wheel cooperation and treat the regional compress of air brushing in being fore-and-aft printing medium moving direction, simultaneously, receive the compress and the tensioning of inferior compress wheel on horizontal when treating the air brushing region through inferior compress wheel, treat that the air brushing region gets into print platform printing area after longitudinal, horizontal compress, the nozzle on the dolly prints to the printing medium that moves to printing region, treats that the air brushing region lasts the tensioning and is printed to after printing the completion through the rolling up ware rolling.

Compared with the prior art, the invention has the beneficial effects that: through the cooperation of the first inflatable shaft, the torque motor and the torque reducer, resistance opposite to the roll feeding direction of the printing medium is provided while the roll is fed, so that the printing medium is tensioned at the input side, and the tension state can be maintained before and after the printing platform is input by matching with the winder at the rear side. Through torque motor, torque reducer's resistance adjustable characteristic, can avoid lax or excessive tensioning, to flexible soft material, it can maintain appropriate tensioning degree to have smooth printed surface after making flexible soft material get into print platform, improve and print the precision and print the effect. Moreover, for a hard paper material or a thick printing material, the printing surface of the hard paper material or the thick printing material can be stretched, tensioned and laid flat by tensioning the hard paper material or the thick printing material through the first tensioning roller, so that the printing precision and the printing effect are improved. The UV printer can be suitable for printing of hard and thick materials and flexible and soft materials by utilizing the matching of the structure, realizes multiple purposes, and overcomes the defect that special printers are required to be adopted for various materials in the prior art. And this application UV printer simple structure, stability, easy to maintain.

Drawings

Fig. 1 is a schematic structural diagram (one) of embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram (ii) of embodiment 1 of the present invention.

Fig. 3 is a schematic structural diagram (iii) of embodiment 1 of the present invention.

Fig. 4 is a schematic structural diagram (iv) of embodiment 1 of the present invention.

Fig. 5 is a schematic structural diagram (v) of embodiment 1 of the present invention.

Fig. 6 is a schematic structural diagram (vi) of embodiment 1 of the present invention.

Fig. 7 is a schematic structural diagram (vii) of embodiment 1 of the present invention.

Description of the drawings: the UV printer comprises a UV printer 100, a left support frame 101, a right support frame 102, a trolley beam 103, a spray truck 104, an unreeling device 105, a first support rod 106, a second support rod 107, a first air expansion shaft 108, a torque motor 1081, a torque reducer 1082, a torque controller 1083, a printing platform 109, a cloth feeding platform 1091, a through hole 1092, a cloth walking shaft 1093, a cloth walking wheel 1094, a pressing wheel 1095, a secondary cloth pressing wheel 1096, an adjusting bracket 1097, a negative pressure hole 1098, a transition guide rod 110, a first guide rod 111, a light box 112, a light emitting surface 1121, a second guide rod 113, a reeling device 114, a primary ink box 200, an ink pump 201, a secondary ink box 202, a spray head 203, a negative pressure box 204, a waste ink tank 205 and a waste ink bottle 206.

Detailed Description

The drawings are only for purposes of illustration and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Example 1

As shown in fig. 1, 2, 3, and 4, the present embodiment discloses a UV printer 100 including: the device comprises a left support frame 101, a right support frame 102, a first support rod 106, a second support rod 107, an unreeling device 105 and a first air expansion shaft 108, wherein the left support frame and the right support frame are respectively arranged on the left side and the right side, the first support rod 106, the second support rod 107, the unreeling device 105 and the first air expansion shaft 108 are arranged on the front side, a printing platform 109 arranged on the middle side, a trolley beam 103 and a spraying trolley 104 arranged above the printing platform 109, and a transition guide rod 110, a first guide rod 111, a lamp box 112, a second guide rod 113 and a winder 114 are arranged on the rear side; the first support rod 106 and the second support rod 107 are arranged below the unreeling device 105 and support the printing medium coiled material together, the printing medium unreeled by the unreeling device 105 reaches the printing platform 109 through the first inflatable shaft 108, and the printed printing medium sequentially passes through the transition guide rod 110, the first guide rod 111, the upper part of the light box 112 and the second guide rod 113 to reach the reeling device 114 and is reeled by the reeling device 114;

as shown in fig. 5, specifically, a torque motor 1081 and a torque reducer 1082 are mounted at an end of the first inflation shaft 108, and the torque motor 1081 drives the first inflation shaft 108 to rotate via the torque reducer 1082. In this embodiment, a torque controller 1083 is further disposed at an end of the first inflatable shaft 108 of the UV printer 100, and is configured to control a torque of the first inflatable shaft 108 during rotation through a torque motor 1081 and a speed reducer. The torque controller 1083 adjusts in real time the torque of the first inflation shaft 108 to maintain a relatively constant material tension.

Specifically, in this embodiment, the unreeling device 105 is a dual-power paper feeder disposed above the first support rod 106 and the second support rod 107; the winder 114 is the second physiosis axle, and high-pressure servo motor, planetary reducer are installed to the tip of second physiosis axle, high-pressure servo motor drives the rotation of second physiosis axle through planetary reducer.

As shown in fig. 1, 2, and 3, in order to facilitate observation of the printing effect of the internal light material, in the embodiment, a light box 112 is provided, where the light box 112 includes a light emitting surface 1121 facing the rear side, diameters of the first guide rod 111 and the second guide rod 113 are 5cm to 8cm, and a distance between the light emitting surface 1121 of the light box 112 and a plane formed by the first guide rod 111 and the second guide rod 113 is 6 cm to 10 cm. .

As shown in fig. 5, in order to enable the printing medium on the first air-expanding shaft 108 to smoothly enter the printing platform 109, in this embodiment, a cloth feeding platform 1091 is further fixed on the front side of the printing platform 109, the cloth feeding platform 1091 is of an arc structure, one end of the cloth feeding platform 1091 is flush with the printing platform 109, and the printing medium unreeled by the unreeling device 105 reaches the printing platform 109 through the first air-expanding shaft 108 and the cloth feeding platform 1091.

As shown in fig. 4, in this embodiment, the printing platform 109 includes a pinch roller area disposed on one side of the printing medium entering and an inkjet area disposed on the other side, and the pinch roller area is provided with a plurality of through holes 1092; a cloth feeding shaft 1093 is arranged below the printing platform 109, a plurality of cloth feeding wheels 1094 corresponding to the positions of the through holes 1092 in the pinch roller area are sleeved on the cloth feeding shaft 1093, and the tops of the cloth feeding wheels 1094 are exposed in the through holes 1092 corresponding to the positions in the pinch roller area; a pinch roller module is arranged above the printing platform 109 and comprises a plurality of pinch rollers 1095 fixed on the trolley beam 103, and the cylindrical surface of the pinch rollers 1095 is attached to the cylindrical surface of the cloth feeding wheel 1094 in the through hole 1092 at the corresponding position on the platform main body. Cloth pressing in the feeding direction and before printing is realized through a pressing wheel 1095.

Meanwhile, in order to further improve the printing effect, as shown in fig. 7, the present embodiment is further provided with a transverse cloth pressing unit, the transverse cloth pressing unit includes a slide rail mounted on the car beam 103, a connecting rod connected to the slide rail and moving along the slide rail, and a secondary cloth pressing wheel 1096 whose length direction is consistent with the feeding direction on the printing platform 109, the length direction of the slide rail is consistent with the length direction of the car beam 103, one end of the connecting rod is slidably connected to the slide rail, the other end of the connecting rod is connected to the secondary cloth pressing wheel 1096 through an adjusting bracket 1097, the secondary cloth pressing wheel 1096 reciprocates in the length direction of the slide rail along with the connecting rod, the adjusting bracket 1097 is used for lifting the secondary cloth pressing wheel 1096 when the connecting rod moves from the outside to the inside, and the secondary cloth pressing wheel 1096 is lowered to press the cloth when the connecting rod moves from the inside to the outside and the secondary cloth pressing wheel 1096 is above the printing medium. The transverse cloth pressing unit is used for tensioning the printing medium in the horizontal and vertical feeding direction. In addition to providing a single transverse cloth pressing unit, a plurality of transverse cloth pressing units may be provided on both the left and right sides, and the plurality of transverse cloth pressing units are arranged on the region of pinch roller 1095, between feed roller 1094 and the printing region. Namely, the left and right transverse cloth pressing units are symmetrically used for transversely tensioning from the left side and the right side respectively, so that the tensioning effect is better. And a plurality of horizontal compress units are arranged on the region of the pinch roller 1095 and between the cloth walking wheel 1094 and the printing region, so that the interference to other compress structures and printing structures can be effectively avoided. Specifically, the adjusting bracket 1097 is driven by a motor to raise the secondary cloth pressing wheel 1096 or lower the secondary cloth pressing wheel 1096.

As shown in fig. 4, in this embodiment, a plurality of negative pressure holes 1098 are uniformly distributed on the inkjet area, and the negative pressure holes 1098 are directly or indirectly connected to a negative pressure device. Specifically, the lower part of the painting area is provided with a negative pressure containing cavity cover body buckled on the lower surface of the painting area, the negative pressure containing cavity cover body is provided with a vent hole, and the vent hole is connected with a negative pressure device. The negative pressure device is a negative pressure fan.

For the ink supply system, as shown in fig. 3 and 4, a first-stage ink cartridge 200 and an ink pump 201 are installed on a left support frame 101 of the printer of this embodiment, a second-stage ink cartridge 202 and a nozzle 203 with an ink bag are installed on a carriage 104, a negative pressure tank 204 is installed on a right support frame 102, the first-stage ink cartridge 200 is communicated with the second-stage ink cartridge 202 through an ink supply pipe, the first-stage ink cartridge 200 is driven by the ink pump 201 to supply ink to the second-stage ink cartridge 202 through the ink supply pipe, the second-stage ink cartridge 202 is connected with the negative pressure tank 204 and the negative pressure tank 204 controls the ink level in the second-stage ink cartridge 202, the second-stage ink cartridge 202 is communicated with the ink bag installed on the nozzle 203, and the ink bag is communicated with a nozzle of the nozzle 203. When bubbles exist in the ink paths from the first-stage ink box 200 to the second-stage ink box 202, the bubbles cannot directly enter the spray head 203, so that the problems of printing disconnection and the like caused by the bubbles can be effectively avoided, and the space which is not completely filled with ink liquid inside the second-stage ink box 202 can also play the effects of buffering and reducing the bubbles in the ink paths from the first-stage ink box 200 to the second-stage ink box 202. The problem of resistance caused by too long a path from the primary ink box 200 to the spray head 203 can be avoided through the secondary ink box 202, and the ink supply is ensured to be smooth, so that the printing effect is improved. The secondary ink box 202 is also connected with a negative pressure box 204, and the liquid level state in the secondary ink box 202 is controlled through the negative pressure box 204, so that the stability of supplying ink to an ink bag and an orifice of the spray head 203 is maintained. For more convenient structural arrangement and ink supply control, the primary ink tank 200 is lower than the secondary ink tank 202 and is lower than or flush with the nozzle holes of the head 203 in the present embodiment.

For the pressure of more accurate control ink to shower nozzle 203, negative pressure tank 204 adopts double-circuit negative pressure tank 204, is equipped with first negative pressure pump, second negative pressure pump, control module in, first negative pressure pump power is less than second negative pressure pump power, first negative pressure pump, second negative pressure pump all are connected with second grade ink horn 202 through the negative pressure pipe of same diameter, and first negative pressure pump, second negative pressure pump are controlled by control module and are opened and close. Through the negative pressure pumps with different powers, the negative pressure degree in the secondary ink box 202 can be accurately adjusted, so that the liquid level can be accurately controlled, and the ink supply is more continuous and stable. Besides negative pressure, a positive pressure pump can be arranged in the negative pressure tank 204 and is connected with the secondary ink box 202 through a positive pressure pipe and used for being matched with the first negative pressure pump and the second negative pressure pump to control the ink liquid level in the secondary ink box 202, and the positive pressure pump is controlled by the control module to be opened and closed. When the negative pressure in the secondary ink tank 202 is large, the positive pressure is provided to return to the negative pressure state required to continue stable ink supply. Specifically, in this embodiment, the secondary ink cartridge 202 is provided with a liquid level switch, and the control module receives a signal of the liquid level switch and responds. That is, the liquid level in the secondary ink tank 202 is determined according to the state of the liquid level switch, so as to provide the negative pressure required in the secondary ink tank 202 at the moment.

The ink pump 201 drives the ink from the first-stage ink box 200 to the second-stage ink box 202, the liquid level in the second-stage ink box 202 of the second-stage ink box 202 is controlled through a liquid level switch and a negative pressure box 204 so as to accurately control the pressure of the ink to the spray head 203, and the second-stage ink box 202 is directly connected with the spray hole through an ink bag. Compared with the traditional siphon, the ink pump 201 supplies ink to the secondary ink box 202 without considering the resistance generated in the ink path process in the siphon process; compare in the condition that prior art one-level ink horn 200 bubble directly gets into the ink sac with shower nozzle 203 zonulae occludens and then get into the orifice and produce the broken string (because the ink sac, the ink sac volume is very little in the integral type structure of shower nozzle 203, in the printing process, the bubble will reach the orifice immediately after getting into the ink sac, can't obtain the buffering), this application ink gets into the ink sac direct with shower nozzle 203 orifice through second grade ink horn 202 earlier, utilize second grade ink horn 202 to provide the buffering on the ink road, can avoid the influence of the interior bubble of one-level ink horn 200.

In order to collect waste ink during printing by using the ink supply system, as shown in fig. 4, the right support frame 102 of this embodiment is provided with a waste ink tank 205, the carriage 104 is located above the waste ink tank 205 when moving to the right side, a waste ink outlet is formed at the bottom of the waste ink tank 205, and the waste ink outlet is communicated with a waste ink bottle 206 placed below the right support frame 102.

Example 2

The embodiment discloses a printing method, which adopts the UV printer 100 of the embodiment 1 to print, and the specific steps include:

the printing medium unreeled by the unreeling device 105 sequentially passes through the first expansion shaft 108 and the printing platform 109 to reach the reeling device 114;

a1, starting the printer, unwinding by the unwinding device 105, winding by the winding device 114, and enabling the area to be subjected to inkjet printing on the printing medium to reach the first air expansion shaft 108;

a2, the first air inflation shaft 108 rotates to feed the roll, and simultaneously provides resistance opposite to the moving direction for the area to be sprayed, and the area to be sprayed moves to the surface of the printing platform 109 in a tensioning mode;

a3, the nozzle 203 on the spray carriage 104 prints the printing medium moving to the surface of the printing platform 109, the area to be sprayed is continuously tensioned and printed, and the area is rolled up by the rolling device 114 after printing.

More specifically, the printing platform 109 comprises a pinch roller area arranged on one side where the printing medium enters and an inkjet area arranged on the other side, and the pinch roller area is provided with a plurality of through holes 1092; a cloth feeding shaft is arranged below the printing platform 109, a plurality of cloth feeding wheels 1094 corresponding to the positions of the through holes 1092 in the pinch roller area are sleeved outside the cloth feeding shaft 1093, and the tops of the cloth feeding wheels 1094 are exposed in the through holes 1092 corresponding to the positions in the pinch roller area; a pinch roller module is arranged above the printing platform 109, the pinch roller module comprises a plurality of pinch rollers 1095 fixed on the trolley beam 103, and the cylindrical surface of the pinch rollers 1095 is attached to the cylindrical surface of a cloth travelling wheel 1094 in a through hole 1092 at the corresponding position on the platform main body;

the UV printer 100 further includes: the cloth pressing device further comprises a transverse cloth pressing unit, wherein the transverse cloth pressing unit comprises a sliding rail, a connecting rod and a secondary cloth pressing wheel 1096, the sliding rail is mounted on the trolley beam 103, the connecting rod is connected with the sliding rail and moves along the sliding rail, the length direction of the secondary cloth pressing wheel 1096 is consistent with the feeding direction of the printing platform 109, the length direction of the sliding rail is consistent with the length direction of the trolley beam 103, one end of the connecting rod is connected with the sliding rail in a sliding mode, the other end of the connecting rod is connected with the secondary cloth pressing wheel 1096 through an adjusting support 1097, the secondary cloth pressing wheel 1096 reciprocates along the length direction of the sliding rail along with the connecting rod, the adjusting support 1097 is used for lifting the secondary cloth pressing wheel 1096 when the connecting rod moves from the outer side to the inner side, and the secondary cloth pressing wheel 1096 is put down to press cloth when the connecting rod moves from the inner side to the outer side and the secondary cloth pressing wheel 1096 is above a printing medium;

the method comprises the following specific steps:

a2 and a first air expansion shaft 108 rotate to feed rolls, and simultaneously provide resistance opposite to the moving direction for an area to be subjected to inkjet printing, the area to be subjected to inkjet printing is tensioned to move, and the area to be subjected to inkjet printing of a printing medium enters a pinch roller area of a printing platform 109;

a3, in the process that a to-be-painted area moves to a printing area in a pinch roller 1095 area, the pinch roller 1095 and a cloth feeding wheel 1094 are matched to compress the to-be-painted area in the longitudinal printing medium moving direction, meanwhile, the to-be-painted area is pressed and tensioned in the transverse direction by a secondary cloth pressing wheel 1096 when passing through the secondary cloth pressing wheel 1096, the to-be-painted area enters the printing area of a printing platform 109 after being pressed in the longitudinal direction and the transverse direction, a spray head 203 on a trolley prints the printing medium moving to the printing area, the to-be-painted area is continuously tensioned and printed, and the to-be-painted area is wound by a winding device 114 after printing is completed.

It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention claims should be included in the protection scope of the present invention claims.

Claims

1. A UV printer, comprising: the device comprises a left supporting frame, a right supporting frame, an unreeling device, a first air expansion shaft, a printing platform, a trolley beam, a spraying trolley and a winding device, wherein the left supporting frame and the right supporting frame are respectively arranged on the left side and the right side; the printing medium that the unreeling device unreeled arrives the winder and is rolled up by the winder through first physiosis axle, print platform in proper order, torque motor, moment speed reducer are installed to first physiosis axle tip, torque motor passes through the rotation of the first physiosis axle of moment speed reducer drive.

2. The UV printer of claim 1, further comprising: the lamp box comprises a first support rod, a second support rod, a first guide rod, a lamp box and a second guide rod, wherein the first support rod and the second support rod are arranged on the front side, and the first guide rod, the lamp box and the second guide rod are arranged on the rear side; the first supporting rod and the second supporting rod are arranged below the unreeling device and jointly support the printing medium coiled material, and the printing medium unreeled by the unreeling device sequentially passes through the first inflatable shaft, the printing platform, the first guide rod, the lamp box upper portion and the second guide rod to reach the reeling device and be reeled by the reeling device.

3. The UV printer of claim 1, wherein the printing platform comprises a pinch roller area arranged on one side of the printing medium entering and an inkjet area arranged on the other side, and the pinch roller area is provided with a plurality of through holes; a cloth feeding shaft is arranged below the printing platform, a plurality of cloth feeding wheels with positions corresponding to the positions of the through holes in the pinch roller area are sleeved outside the cloth feeding shaft, and the tops of the cloth feeding wheels are exposed in the through holes in the corresponding positions in the pinch roller area; the printing platform top is equipped with the pinch roller module, the pinch roller module is including being fixed in a plurality of pinch rollers on the dolly roof beam, and the cylinder of pinch roller and the cylinder laminating of walking in the through-hole of corresponding position on the platform main part and taking turns.

4. The UV printer of claim 1, wherein the left support frame is provided with a first ink tank and an ink pump, the carriage is provided with a second ink tank and a nozzle provided with an ink bag, the right support frame is provided with a negative pressure tank, the first ink tank is communicated with the second ink tank through an ink supply pipe, the first ink tank is driven by the ink pump to supply ink to the second ink tank through the ink supply pipe, the second ink tank is connected with the negative pressure tank and is controlled by the negative pressure tank to control the ink level in the second ink tank, the second ink tank is communicated with the ink bag arranged on the nozzle, and the ink bag is communicated with the nozzle hole.

5. The UV printer according to claim 4, wherein the negative pressure tank is a two-way negative pressure tank, a first negative pressure pump, a second negative pressure pump and a control module are arranged in the negative pressure tank, the power of the first negative pressure pump is smaller than that of the second negative pressure pump, the first negative pressure pump and the second negative pressure pump are both connected with the second-stage ink box through negative pressure pipes with the same diameter, and the first negative pressure pump and the second negative pressure pump are controlled by the control module to be opened and closed.

6. The UV printer of claim 5, wherein the secondary ink tank has a level switch disposed thereon, and the control module receives and responds to the level switch signal.

7. The UV printer of claim 4, wherein the right support frame is provided with a waste ink tank, the carriage is located above the waste ink tank when moving to the right, a waste ink outlet is formed at the bottom of the waste ink tank, and the waste ink outlet is communicated with a waste ink bottle placed below the right support frame.

8. The UV printer of any one of claims 1-7, wherein the unreeling device is a dual-power paper feeder disposed above the first support bar and the second support bar.

9. The UV printer of any one of claims 1-7, wherein the winder is a second air shaft.

10. The UV printer of any one of claims 1 to 7, wherein a plurality of negative pressure holes are distributed on the printing platform, and a negative pressure device is directly or indirectly connected to the negative pressure holes.